Projection equipment

Abstract

The utility model provides projection equipment, and relates to the technical field of optical equipment. The projection equipment not only can realize good sealing performance, but also can improve the heat dissipation efficiency. The projection equipment comprises a ray machine shell, a ray machine assembly and a first heat dissipation assembly, wherein the ray machine shell is enclosed to form a closed cavity and is provided with a first opening, and the closed cavity is communicated with the outside of the ray machine shell through the first opening; at least one part of the ray machine assembly is positioned in the closed cavity and is used for generating projection rays; one part of the first heat dissipation assembly is installed in the closed cavity, and the other part of the first heat dissipation assembly extends to the outside of the ray machine shell through the first opening.

Description

Technical Field

[0001] The present application relates to the technical field of optical equipment, and in particular to a projection device. Background Art

[0002] Projection equipment is increasingly used, and there are more and more types of projection equipment, such as transmissive projectors and reflective projectors. However, no matter what type of projector, it will generate heat during operation, especially the optical and mechanical part of the projector used to generate the projection light.

[0003] In the related art, a semi-enclosed heat dissipation method is used for the optical and mechanical parts of the projector, which has a high heat dissipation efficiency but a poor dustproof effect. Therefore, a projector device with both high heat dissipation efficiency and good sealing is needed. Utility Model Content

[0004] The present application provides a projection device that can achieve good sealing and improve heat dissipation efficiency.

[0005] The projection device provided in the present application includes: an optical machine housing, an optical machine component and a first heat dissipation component; wherein the optical machine housing encloses a closed cavity and has a first opening, and the first opening connects the closed cavity with the outside of the optical machine housing; at least a portion of the optical machine component is located in the closed cavity and is used to generate projection light; a portion of the first heat dissipation component is installed in the closed cavity, and the other portion extends to the outside of the optical machine housing through the first opening, and the first heat dissipation component is sealed to the edge of the first opening on the optical machine housing, and the first heat dissipation component is used to transfer the heat generated by the optical machine component in the closed cavity to the outside of the optical machine housing.

[0006] The projection device provided by the present application, because the optical machine housing is set to have a structure with a closed cavity and a first opening, at least the part of the optical machine component that generates the projection light can be installed in the closed cavity. And a part of the first heat dissipation component is installed in the closed cavity, so that the other part of the first heat dissipation component extends from the first opening on the optical machine housing to the outside of the optical machine housing, and the first heat dissipation component is sealed and connected to the edge of the first opening on the optical machine housing. In this way, the heat generated by the optical machine component in the closed cavity can be transferred to the outside of the optical machine housing through the first heat dissipation component, thereby improving the heat dissipation efficiency of the optical machine component, which is beneficial to improving the heat dissipation efficiency of the projection device, and can also improve the sealing of the optical machine component, which is beneficial to reducing the influence of dust and the like on the optical machine component and the projection light. Therefore, the projection device provided by the present application can not only achieve good sealing of the optical machine component, but also improve the heat dissipation efficiency of the optical machine component.

[0007] In one possible implementation of the present application, the optical machine housing also has a second opening connected to the closed cavity; the optical machine component includes an imaging component and a light source component, the imaging component and the light source component are relatively arranged at the second opening, and the imaging component is located in the closed cavity, the light source component is located outside the optical machine housing, and the light source component is sealed and connected to the edge of the second opening on the optical machine housing, and the illumination light generated by the light source component is transmitted to the imaging component through the second opening.

[0008] In the technical solution of the present application, since the imaging component is arranged in the closed cavity and the light source component is arranged outside the optical machine housing, the light source component can be in direct contact with the air outside the optical machine housing, which can not only improve the heat dissipation efficiency of the light source component, but also help to reduce the heat generated by the optical machine component in the closed cavity. At the same time, the light source component is sealed and connected to the edge of the second opening on the optical machine housing, so that the closed cavity can maintain good sealing, which is conducive to reducing the influence of dust and the like on the projection light generated by the imaging component and the optical machine component.

[0009] In one possible implementation of the present application, the first heat dissipation component includes a first airflow generator and a first heat conductor; a portion of the first heat conductor is located in the closed cavity and is adjacent to the imaging component, and the other portion extends to the outside of the optical machine housing through the first opening, and the first heat conductor is sealed and connected to the edge of the first opening on the optical machine housing; the first airflow generator is installed in the closed cavity and is located on the side of the first heat conductor away from the imaging component, and the first airflow generator is used to form a first heat dissipation airflow that flows through the first heat conductor and the imaging component in sequence.

[0010] In the technical solution of the present application, since the edge of the first opening of the optical machine housing is sealed and connected to the first heat-conducting member, the heat in the closed cavity can be absorbed by the first heat-conducting member and the heat can be transferred to the outside of the optical machine housing. In addition, a first airflow generator is arranged in the closed cavity, and the airflow velocity in the closed cavity can be accelerated by the first airflow generator, so that a first heat dissipation airflow flowing through the first heat-conducting member and the imaging component is formed in the closed cavity, thereby improving the heat exchange efficiency between the first heat-conducting member and the imaging component and the gas in the closed cavity, and further improving the heat dissipation efficiency of the first heat-conducting member to the closed cavity.

[0011] In a possible implementation of the present application, the closed cavity also has a reflow channel, which extends along the arrangement direction of the first airflow generator, the first heat conductor and the imaging component, and is located between the cavity wall of the closed cavity and the first airflow generator, the first heat conductor and the imaging component; the air inlet of the first airflow generator faces one end of the reflow channel, the air outlet of the first airflow generator faces the first heat conductor, and the imaging component has a heat dissipation duct; wherein the first heat dissipation airflow flows through the heat dissipation duct and then enters the end of the reflow channel away from the air inlet.

[0012] In the technical solution of the present application, since a reflow channel is provided in the closed cavity, after the first heat dissipation airflow flows through the imaging component, it can quickly enter the air inlet of the first airflow generator through the reflow channel, thereby accelerating the circulation speed of the first heat dissipation airflow in the closed cavity, and further improving the heat dissipation efficiency of the imaging component.

[0013] In one possible implementation of the present application, the first heat conductive component includes a heat transfer structure, an internal heat dissipation structure and an external heat dissipation structure, the internal heat dissipation structure is at least partially located in the closed cavity, the external heat dissipation structure is at least partially located outside the optical machine housing, the internal heat dissipation structure and the external heat dissipation structure are connected through a heat transfer structure, and the heat transfer structure includes at least one of the following: a semiconductor refrigerator, a heat pipe, thermal grease and a thermal pad.

[0014] In the technical solution of the present application, since the first heat-conducting component includes a heat transfer structure, an internal heat dissipation structure and an external heat dissipation structure, the heat transfer structure can adopt at least one of a semiconductor refrigerator, a heat pipe, thermal grease and a thermal pad, and the internal heat dissipation structure and the external heat dissipation structure can select aluminum extrusion or heat dissipation fins, etc., which can provide more options for the manufacture of projection equipment, so that the manufacturing cost of the projection equipment can be reduced while meeting the heat dissipation requirements.

[0015] In one possible implementation of the present application, the projection device also includes a second airflow generator and a second heat conductor; a portion of the second heat conductor is adjacent to a portion of the first heat dissipation assembly located outside the optical machine housing, and another portion is connected to a portion of the optical machine assembly located outside the optical machine housing; the second airflow generator and the second heat conductor are arranged correspondingly to form a second heat dissipation airflow, and the second heat dissipation airflow flows through the second heat conductor, the portion of the first heat dissipation assembly located outside the optical machine housing, and the portion of the optical machine assembly located outside the optical machine housing.

[0016] In the technical solution of the present application, since another part of the second heat-conducting member is connected to the part of the optical-mechanical assembly located outside the optical-mechanical housing, the heat generated by the part of the optical-mechanical assembly located outside the optical-mechanical housing can be absorbed and transferred by the second heat-conducting member, which is conducive to improving the heat dissipation efficiency of the part of the optical-mechanical assembly located outside the optical-mechanical housing. In addition, a part of the second heat-conducting member can be connected to the part of the first heat-dissipating assembly located outside the optical-mechanical housing, or a part of the second heat-conducting member can be adjacent to the part of the first heat-dissipating assembly located outside the optical-mechanical housing with a gap, which can not only increase the surface area of ​​the second heat-conducting member, but also reduce the volume of the projection device through a reasonable structure. At the same time, a second airflow generator is provided, so that the second heat dissipation airflow generated by the second airflow generator flows through the second heat-conducting member, the part of the first heat-dissipating assembly located outside the optical-mechanical housing, and the part of the optical-mechanical assembly located outside the optical-mechanical housing, which can improve the heat exchange efficiency between the second heat-conducting member and the part of the optical-mechanical assembly located outside the optical-mechanical housing and the air, and can improve the heat exchange efficiency between the part of the first heat-dissipating assembly located outside the optical-mechanical housing and the air, thereby improving the heat dissipation efficiency of the entire projection device.

[0017] In one possible implementation of the present application, the projection device includes two second airflow generators, one second airflow generator is located on a side of the second heat-conducting member away from a portion of the optomechanical assembly located outside the optomechanical housing, and the other second airflow generator is located on a side of the portion of the optomechanical assembly located outside the optomechanical housing away from the second heat-conducting member; wherein the directions of the airflows generated by the two second airflow generators are consistent.

[0018] In the technical solution of the present application, since two second airflow generators are provided in the projection device, and the two second airflow generators are respectively arranged on both sides of the device with higher heat in the projection device, the flow speed of the air outside the optical machine housing in the projection device can be accelerated by blowing air through one second airflow generator and inhaling air through the other second airflow generator, thereby improving the heat exchange efficiency between the device with higher heat in the projection device and the air, and further improving the heat dissipation efficiency of the projection device.

[0019] In one possible implementation of the present application, the projection device further includes a control component, which is located outside the optical machine housing and adjacent to the second heat conductor, and is used to control the operating state of the projection device, and the second heat dissipation airflow can flow through the control component.

[0020] In the technical solution of the present application, since the control component is arranged outside the optical machine housing and in the area adjacent to the second heat conductor, the second heat dissipation airflow generated by the second airflow generator can also flow through the control component, thereby improving the heat dissipation efficiency of the control component.

[0021] In one possible implementation of the present application, the optical machine housing also has a third opening connected to the closed cavity; the projection device also includes a lens assembly sealed and mounted on the third opening, the lens assembly is located on the transmission path of the projection light generated by the optical machine assembly, and the axis of the lens assembly is parallel to the flow direction of the second heat dissipation airflow.

[0022] In the technical solution of the present application, since the lens assembly is sealed and connected to the optical machine housing, the risk of dust entering the closed cavity can be reduced. And the axis of the lens assembly is parallel to the flow direction of the second heat dissipation airflow, which can reduce the size of the projection device along the extension direction of the optical machine assembly.

[0023] In one possible implementation of the present application, the projection device also includes a fixed cylinder having a heat dissipation hole; one end of the fixed cylinder is connected to the edge of a second opening on the optical machine housing, and a portion of the optical machine assembly located outside the optical machine housing is arranged in the fixed cylinder; and a second heat dissipation airflow flows through the portion of the optical machine assembly located outside the optical machine housing through the heat dissipation hole.

[0024] In the technical solution of the present application, since a fixing cylinder is provided on the optical machine housing, the light source assembly in the optical machine assembly can be mounted on the optical machine housing through the fixing cylinder. In addition, a heat dissipation hole is provided on the fixing cylinder, so that the second heat dissipation airflow can flow through the light concentrator and the light source assembly through the heat dissipation hole to improve the heat dissipation efficiency of the light concentrator and the light source assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic diagram of the structure of the projection device provided in this application;

[0026] Figure 2 Schematic diagram of the internal structure of the projection device provided for this application Figure 1 ;

[0027] Figure 3 Schematic diagram of the internal structure of the projection device provided for this application Figure 2 ;

[0028] Figure 4 Schematic diagram of the internal structure of the projection device provided for this application Figure 3 .

[0029] Description of reference numerals:

[0030] 1-optical machine housing; 11-enclosed cavity; 12-third opening; 13-return channel; 14-partition; 15-fixed cylinder; 151-heat dissipation hole; 2-optical machine assembly; 21-imaging assembly; 22-light source assembly; 23-focusing element; 3-first heat dissipation assembly; 31-first airflow generator; 32-first heat conducting element; 321-heat transfer structure; 322-internal heat dissipation structure; 323-external heat dissipation structure; 4-second heat dissipation assembly; 41-second airflow generator; 42-second heat conducting element; 5-control assembly; 6-lens assembly; 7-speaker; 8-housing; 9-reflecting element; Q1-first heat dissipation airflow; Q2-second heat dissipation airflow. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the specific technical solution of the present application will be further described in detail below in conjunction with the drawings in the embodiments of the present application. The following embodiments are used to illustrate the present application, but are not used to limit the scope of the present application.

[0032] In the embodiments of the present application, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present application, unless otherwise specified, "multiple" means two or more.

[0033] In addition, in the embodiments of the present application, directional terms such as "up", "down", "left" and "right" are defined relative to the orientation of the components in the drawings. It should be understood that these directional terms are relative concepts. They are used for relative description and clarification, and they may change accordingly according to the changes in the orientation of the components in the drawings.

[0034] In the embodiments of the present application, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium.

[0035] In the embodiments of the present application, the terms "include", "comprises" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0036] In the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0037] The working principle of the projection device is to irradiate light onto the display element of the image to generate an image, which is then projected through the lens. The optical machine part used to generate the projection light in the projection device will generate heat during operation, and at least the optical machine part needs to be cooled and cooled. In addition, the optical machine part will generate projection light. In order to improve the stability of the projection light transmission and reduce the impact of dust and other factors on the projection light transmission, the optical machine part needs to be sealed. However, the sealing and heat dissipation of the optical machine part are contradictory, that is, when the optical machine part is completely sealed, the heat dissipation of the optical machine part will be affected, reducing the heat dissipation effect. Therefore, a projection device is needed that can achieve good sealing and improve heat dissipation efficiency.

[0038] The present application embodiment provides a projection device, referring to Figure 1 , Figure 2 , Figure 3 and Figure 4 , Figure 1 shows a schematic diagram of the structure of the projection device provided by the present application, Figure 2 , Figure 3 and Figure 4 All of them show schematic diagrams of the internal structure of the projection device provided by the present application. The projection device provided by the embodiment of the present application includes: an optical machine housing 1, an optical machine component 2 and a first heat dissipation component 3; wherein the optical machine housing 1 encloses a closed cavity 11 and has a first opening, and the first opening connects the closed cavity 11 with the outside of the optical machine housing 1; at least a part of the optical machine component 2 is located in the closed cavity 11, and is used to generate projection light; a part of the first heat dissipation component 3 is installed in the closed cavity 11, and the other part extends to the outside of the optical machine housing 1 through the first opening, and the first heat dissipation component 3 is sealed and connected to the edge of the first opening on the optical machine housing 1, and the first heat dissipation component 3 is used to transfer the heat generated by the optical machine component 2 in the closed cavity 11 to the outside of the optical machine housing 1.

[0039] In the present application embodiment, Figure 1 As shown, a shell 8 may be provided for the projection device, the shell 8 having a cavity, and a shell wall of the shell 8 having some through holes, for example, a projection hole for transmitting projection light, a heat dissipation port for the flow of heat dissipation airflow, etc. Each component in the projection device may be installed in the cavity of the shell 8, with the lens facing the projection hole, and the heat dissipation component facing the heat dissipation port.

[0040] In the embodiment of the present application, the optical-mechanical component 2 can generate projection light. For example, the optical-mechanical component 2 includes an imaging component 21 for generating an image and a light source component 22 for providing illumination light. Figure 2 and Figure 3 As shown, an optical-mechanical housing 1 may be provided in the projection device, so that the optical-mechanical assembly 2 may be installed through the optical-mechanical housing 1 and at least a portion of the optical-mechanical assembly 2 may be sealed.

[0041] Exemplarily, the optical machine housing 1 may be configured as a box-shaped structure having a closed cavity 11, and at least one opening may be provided on the optical machine housing 1. For example, the spatial structure of the closed cavity 11 may be provided according to the structure of the devices and other devices installed in the closed cavity 11 of the optical machine housing 1 in the optical machine assembly 2, as well as the space occupied, etc. The optical machine assembly 2 may be installed entirely in the closed cavity 11, or a portion of the optical machine assembly 2 may be installed in the closed cavity 11, and the other portion may be installed outside the optical machine housing 1. In this way, the heat generated by the optical machine assembly 2 during operation will heat the closed cavity 11, thereby increasing the temperature in the closed cavity 11.

[0042] In the embodiment of the present application, a first heat dissipation component 3 may be provided in the projection device to dissipate heat from a portion of the optical-mechanical component 2 located in the closed cavity 11 through the first heat dissipation component 3. Figure 3 and Figure 4 As shown, a through hole serving as a first opening may be provided on the shell wall of the optical machine housing 1 , and the first opening may connect the inside of the closed cavity 11 with the outside of the optical machine housing 1 .

[0043] Exemplarily, a part of the first heat dissipation component 3 can be arranged in the closed cavity 11, and the other part can be arranged outside the optical machine housing 1, that is, the first heat dissipation component 3 is inserted into the first opening. And the first heat dissipation component 3 can be sealed and connected to the edge part of the first opening on the optical machine housing 1. In this way, the closed cavity 11 in the optical machine housing 1 can maintain good sealing. At the same time, the heat in the closed cavity 11 can be absorbed by the part of the first heat dissipation component 3 located in the closed cavity 11, and the heat absorbed by the first heat dissipation component 3 located outside the optical machine housing 1 can be dissipated to the air outside the optical machine housing 1, so that the closed cavity 11 can be cooled and the optical machine component 2 can be cooled and cooled.

[0044] The projection device provided in the embodiment of the present application, because the optical machine housing 1 is set to have a structure with a closed cavity 11 and a first opening, at least the part of the optical machine component 2 that generates the projection light can be installed in the closed cavity 11. And a part of the first heat dissipation component 3 is installed in the closed cavity 11, so that the other part of the first heat dissipation component 3 extends from the first opening on the optical machine housing 1 to the outside of the optical machine housing 1, and the first heat dissipation component 3 is sealed and connected to the edge of the first opening on the optical machine housing 1. In this way, the heat generated by the optical machine component 2 in the closed cavity 11 can be transferred to the outside of the optical machine housing 1 through the first heat dissipation component 3, so that the heat dissipation efficiency of the optical machine component 2 can be improved, which is conducive to improving the heat dissipation efficiency of the projection device, and the sealing of the optical machine component 2 can be improved, which is conducive to reducing the influence of dust and the like on the optical machine component 2 and the projection light. Therefore, the projection device provided in the present application can not only achieve good sealing of the optical machine component 2, but also improve the heat dissipation efficiency of the optical machine component 2.

[0045] In some possible embodiments of the present application, the optical machine housing 1 also has a second opening connected to the closed cavity 11; the optical machine component 2 includes an imaging component 21 and a light source component 22, and the imaging component 21 and the light source component 22 are relatively arranged at the second opening, and the imaging component 21 is located in the closed cavity 11, and the light source component 22 is located outside the optical machine housing 1, and the light source component 22 is sealed and connected to the edge of the second opening on the optical machine housing 1, and the illumination light generated by the light source component 22 is transmitted to the imaging component 21 through the second opening.

[0046] In the present application embodiment, Figure 2 and Figure 3 As shown, the optical-mechanical assembly 2 includes an imaging assembly 21 and a light source assembly 22. The imaging assembly 21 can generate an image, for example, the imaging assembly 21 can use a liquid crystal display, a digital micromirror device (DMD), etc. The light source assembly 22 can generate light with higher brightness, for example, the light source assembly 22 can use an incandescent lamp, a xenon lamp, or a light-emitting diode (LED), etc.

[0047] Exemplarily, a second opening may be provided on the optical machine housing 1, for example, a through hole serving as the second opening may be provided on the same housing wall as the first opening on the optical machine housing 1, and the second opening may be adjacent to the first opening. Then, the imaging assembly 21 may be provided at the second opening in the closed cavity 11, and the light source assembly 22 may be provided at a position adjacent to the second opening outside the optical machine housing 1, so that the illumination light generated by the light source assembly 22 may be transmitted to the imaging assembly 21 through the second opening.

[0048] Another example, you can Figure 3As shown, a condenser 23 can also be provided in the optical machine assembly 2. For example, the condenser 23 can be provided as a cylindrical structure, such as a cylindrical shape that is approximately a quadrangular pyramid. One end of the condenser 23 can be sealed to the light source assembly 22, and the other end of the condenser 23 can be sealed to the edge of the second opening on the optical machine housing 1, so that the light source assembly 22 can be sealed to the edge of the second opening on the optical machine housing 1. For example, the sealed connection can be achieved by bonding. In this way, under the restriction of the condenser 23, the illumination light generated by the light source assembly 22 can be transmitted to the imaging assembly 21 as completely as possible.

[0049] In the above embodiment, since the imaging component 21 is arranged in the closed cavity 11 and the light source component 22 is arranged outside the optical machine housing 1, the light source component 22 can be directly in contact with the air outside the optical machine housing 1, which can not only improve the heat dissipation efficiency of the light source component 22, but also help to reduce the heat generated by the optical machine component 2 in the closed cavity 11. At the same time, the light source component 22 is sealed and connected to the edge of the second opening on the optical machine housing 1, so that the closed cavity 11 can maintain good sealing, which is conducive to reducing the influence of dust and the like on the projection light generated by the imaging component 21 and the optical machine component 2.

[0050] In some possible embodiments of the present application, Figure 3 and Figure 4 As shown, the first heat dissipation component 3 includes a first airflow generator 31 and a first heat conductor 32; a portion of the first heat conductor 32 is located in the closed cavity 11 and is adjacent to the imaging component 21, and the other portion extends to the outside of the optical machine housing 1 through the first opening, and the first heat conductor 32 is sealed and connected to the edge of the first opening on the optical machine housing 1; the first airflow generator 31 is installed in the closed cavity 11 and is located on the side of the first heat conductor 32 away from the imaging component 21, and the first airflow generator 31 is used to form a first heat dissipation airflow Q1 that flows through the first heat conductor 32 and the imaging component 21 in sequence.

[0051] In the embodiment of the present application, the first heat dissipation component 3 can be configured to include a first airflow generator 31 and a first heat conductor 32. The first heat conductor 32 absorbs and transfers the heat in the closed cavity 11, while the first airflow generator 31 accelerates the flow rate of the airflow in the closed cavity 11.

[0052] Exemplarily, the first heat-conducting member 32 may be a device of an integrated structure. Part of the first heat-conducting member 32 may be disposed in the closed cavity 11, and another part of the first heat-conducting member 32 may be disposed outside the optical machine housing 1, that is, the first heat-conducting member 32 is inserted into the first opening on the optical machine housing 1, and at the same time, the first heat-conducting member 32 is sealed and connected to the edge of the first opening on the optical machine housing 1. For example, the part of the first heat-conducting member 32 located in the closed cavity 11 is adjacent to the imaging component 21 with a gap, or the part of the first heat-conducting member 32 located in the closed cavity 11 is in contact with the imaging component 21, so that the heat generated by the imaging component 21 can be quickly transferred to the first heat-conducting member 32. In this way, the first heat-conducting member 32 can absorb the heat in the closed cavity 11 and transfer the heat to the outside of the optical machine housing 1. For example, the first heat-conducting member 32 may be a semiconductor refrigerator, a heat pipe, aluminum extrusion, etc.

[0053] In another example, the first airflow generator 31 can be a fan, and the first airflow generator 31 can be installed in the closed cavity 11, and the first airflow generator 31 can be installed on the side of the first heat-conducting member 32 away from the imaging assembly 21, and the first airflow generator 31, the first heat-conducting member 32 and the imaging assembly 21 are arranged in sequence. In this way, when the first airflow generator 31 is in operation, the generated first heat dissipation airflow Q1 can flow through the first heat-conducting member 32 and the imaging assembly 21 in sequence.

[0054] In the above embodiment, since the edge of the first opening of the optical machine housing 1 is sealed and connected with the first heat-conducting member 32, the heat in the closed cavity 11 can be absorbed by the first heat-conducting member 32, and the heat can be transferred to the outside of the optical machine housing 1. In addition, a first airflow generator 31 is arranged in the closed cavity 11, and the airflow velocity in the closed cavity 11 can be accelerated by the first airflow generator 31, so that a first heat dissipation airflow Q1 flowing through the first heat-conducting member 32 and the imaging component 21 is formed in the closed cavity 11, thereby improving the heat exchange efficiency between the first heat-conducting member 32 and the imaging component 21 and the gas in the closed cavity 11, and further improving the heat dissipation efficiency of the first heat-conducting member 32 to the closed cavity 11.

[0055] In some possible embodiments of the present application, Figure 4 As shown, the closed cavity 11 also has a return channel 13 (such as the area enclosed by the dotted box in the figure), and the return channel 13 extends along the arrangement direction of the first airflow generator 31, the first heat conductor 32 and the imaging component 21, and is located between the cavity wall of the closed cavity 11 and the first airflow generator 31, the first heat conductor 32, and the imaging component 21; the air inlet of the first airflow generator 31 faces one end of the return channel 13, and the air outlet of the first airflow generator 31 faces the first heat conductor 32, and the imaging component 21 has a heat dissipation duct; wherein, the first heat dissipation airflow Q1 flows through the heat dissipation duct and then enters the end of the return channel 13 away from the air inlet.

[0056] In the embodiment of the present application, a reflux channel 13 may be provided in the closed cavity 11 to guide the first heat dissipation airflow Q1 to circulate in the closed cavity 11 .

[0057] Exemplarily, the space of the closed cavity 11 can be set to be larger than the space required for installing the first airflow generator 31, the first heat conductor 32 and the imaging assembly 21. For example, the first airflow generator 31, the first heat conductor 32 and the imaging assembly 21 are all installed on the same side of the closed cavity 11, and there is a gap between the other side of the closed cavity 11 and the first airflow generator 31, the first heat conductor 32 and the imaging assembly 21. Then, the gap between the cavity wall of the closed cavity 11 and the first airflow generator 31, the first heat conductor 32 and the imaging assembly 21 can be used as the return channel 13, and the gap extends along the arrangement direction of the first airflow generator 31, the first heat conductor 32 and the imaging assembly 21. Figure 3 As shown, a partition 14 is arranged in the closed cavity 11 , and the partition 14 extends along the arrangement direction of the first airflow generator 31 , the first heat conductor 32 and the imaging assembly 21 . The partition 14 can isolate the reflux channel 13 from the first heat conductor 32 and the imaging assembly 21 .

[0058] In another example, the first airflow generator 31 may be a centrifugal fan, with the air outlet of the centrifugal fan facing the first heat conducting member 32, and the air inlet of the centrifugal fan facing one end of the return channel 13. A heat dissipation air duct may be provided on the imaging component 21 to increase the contact area between the imaging component 21 and the first heat dissipation airflow Q1. Figure 4 As shown, the first heat dissipation airflow Q1 generated by the centrifugal fan flows through the first heat conductor 32, then flows through the heat dissipation air duct on the imaging component 21, and then, under the restriction of the shell wall of the closed cavity 11, the first heat dissipation airflow Q1 enters the return channel 13, and finally reaches the air inlet of the centrifugal fan.

[0059] In the above embodiment, since a reflow channel 13 is provided in the closed cavity 11, after the first heat dissipation airflow Q1 flows through the imaging component 21, it can quickly enter the air inlet of the first airflow generator 31 through the reflow channel 13, thereby accelerating the circulation speed of the first heat dissipation airflow Q1 in the closed cavity 11, and further improving the heat dissipation efficiency of the imaging component 21.

[0060] In some possible embodiments of the present application, Figure 3As shown, the first heat-conducting member 32 includes a heat transfer structure 321, an internal heat dissipation structure 322 and an external heat dissipation structure 323. The internal heat dissipation structure 322 is at least partially located in the closed cavity 11, and the external heat dissipation structure 323 is at least partially located outside the optical machine housing 1. The internal heat dissipation structure 322 and the external heat dissipation structure 323 are connected through the heat transfer structure 321. The heat transfer structure 321 includes at least one of the following: a semiconductor refrigerator (Thermoelectric cooler, TEC), a heat pipe, thermal grease and a thermal pad.

[0061] In the embodiment of the present application, the structural type of the first heat conducting member 32 can be selected according to the actual working condition of the projection device, so that the projection device has a heat dissipation solution with a better cost.

[0062] Exemplarily, the first heat conducting member 32 may be provided as a split structure including a heat transfer structure 321, an internal heat dissipation structure 322, and an external heat dissipation structure 323. For example, the internal heat dissipation structure 322 may be provided on the heat transfer structure 321 at one end close to the closed cavity 11, and the internal heat dissipation structure 322 abuts against the heat transfer structure 321 to increase the surface area of ​​the portion of the first heat conducting member 32 located in the closed cavity 11. The internal heat dissipation structure 322 may be completely located in the closed cavity 11; or a portion of the internal heat dissipation structure 322 may be located in the closed cavity 11, and another portion of the internal heat dissipation structure 322 may be located in the first opening, or may extend from the first opening to the outside of the optical machine housing 1.

[0063] Alternatively, an external heat dissipation structure 323 may be provided on the end of the heat transfer structure 321 away from the closed cavity 11, and the external heat dissipation structure 323 abuts against the heat transfer structure 321 to increase the surface area of ​​the portion of the first heat conductor 32 located outside the optical machine housing 1. The heat transfer structure 321 may be entirely or partially located outside the closed cavity 11, and in this case, the external heat dissipation structure 323 may be completely located outside the optical machine housing 1. In the case where both the heat transfer structure 321 and the internal heat dissipation structure 322 are completely located in the closed cavity 11, a portion of the external heat dissipation structure 323 may be located in the first opening, or a portion of the external heat dissipation structure 323 may pass through the first opening and be located in the closed cavity 11. For example, both the internal heat dissipation structure 322 and the external heat dissipation structure 323 may be heat dissipation fins or aluminum extrusions.

[0064] In another example, the heat transfer structure 321 may be any one or more of TEC, heat pipe, thermal grease and thermal pad. For example, the cold end of the TEC is arranged in the closed cavity 11, the hot end of the TEC is arranged outside the optical machine housing 1, and the TEC is sealed and connected to the edge of the first opening on the optical machine housing 1. One end of the heat pipe may be arranged in the closed cavity 11, and the other end of the heat pipe may be extended to the outside of the optical machine housing 1 through the first opening.

[0065] In another example, when at least part of the internal heat dissipation structure 322 is disposed in the closed cavity 11, or at least part of the external heat dissipation structure 323 is disposed outside the optical machine housing 1, the internal heat dissipation structure 322 and the external heat dissipation structure 323 can be connected by thermal grease or thermal pads. Both thermal grease and thermal pads are high-performance gap-filling thermal conductive materials with good viscosity, flexibility, compression performance and excellent thermal conductivity. The thermal transfer efficiency of the internal heat dissipation structure 322 and the external heat dissipation structure 323 can be improved by thermal grease or thermal pads.

[0066] In the above embodiment, since the first heat conducting member 32 includes a heat transfer structure 321, an internal heat dissipation structure 322 and an external heat dissipation structure 323, the heat transfer structure 321 can adopt at least one of a semiconductor cooler, a heat pipe, thermal grease and a thermal pad, and the internal heat dissipation structure 322 and the external heat dissipation structure 323 can select aluminum extrusion or heat dissipation fins, etc., which can provide more options for the manufacture of the projection device, so that the projection device can reduce the manufacturing cost while meeting the heat dissipation requirements.

[0067] In some possible embodiments of the present application, Figure 2 , Figure 3 and Figure 4 As shown, the projection device also includes a second airflow generator 41 and a second heat conductor 42; a portion of the second heat conductor 42 is adjacent to a portion of the first heat dissipation component 3 located outside the optical machine housing 1, and the other portion is connected to a portion of the optical machine component 2 located outside the optical machine housing 1; the second airflow generator 41 and the second heat conductor 42 are correspondingly arranged to form a second heat dissipation airflow Q2, and the second heat dissipation airflow Q2 flows through the second heat conductor 42, the portion of the first heat dissipation component 3 located outside the optical machine housing 1, and the portion of the optical machine component 2 located outside the optical machine housing 1.

[0068] In the embodiment of the present application, a second heat dissipation component 4 may be provided in the projection device to dissipate heat and cool down the components located outside the optical machine housing 1 in the projection device through the second heat dissipation component 4. For example, the second heat dissipation component 4 may be provided in a structural form including a second airflow generator 41 and a second heat conductor 42.

[0069] Exemplarily, a part of the second heat-conducting member 42 can be connected to the part of the optical-mechanical assembly 2 located outside the optical-mechanical housing 1, that is, a part of the second heat-conducting member 42 is connected to the light source assembly 22, so that the heat generated by the light source assembly 22 is absorbed by the second heat-conducting member 42, thereby reducing the temperature of the light source assembly 22. Another part of the second heat-conducting member 42 can be arranged adjacent to the part of the first heat-dissipating assembly 3 located outside the optical-mechanical housing 1, that is, another part of the second heat-conducting member 42 is overlapped with the external heat-dissipating structure 323. For example, both parts of the second heat-conducting member 42 can adopt heat-dissipating fins, and the two parts of the heat-dissipating fins are connected by a heat pipe. In this way, not only the surface area of ​​the second heat-conducting member 42 can be increased, but also the length of the projection device in the extension direction of the optical-mechanical assembly 2 can be reduced, which is conducive to reducing the overall volume of the projection device.

[0070] In another example, the second airflow generator 41 may be disposed adjacent to the second heat conducting member 42, for example, the second airflow generator 41 may be disposed on a side of the external heat dissipation structure 323 away from the light source assembly 22. Figure 4 As shown, the second heat dissipation airflow Q2 generated by the second airflow generator 41 can flow through the external heat dissipation structure 323, the second heat conducting member 42, the light focusing member 23 and the light source assembly 22. The second airflow generator 41 can be an axial flow fan.

[0071] In the above embodiment, since another part of the second heat-conducting member 42 is connected to the part of the optical-mechanical assembly 2 located outside the optical-mechanical housing 1, the heat generated by the part of the optical-mechanical assembly 2 located outside the optical-mechanical housing 1 can be absorbed and transferred by the second heat-conducting member 42, which is conducive to improving the heat dissipation efficiency of the part of the optical-mechanical assembly 2 located outside the optical-mechanical housing 1. In addition, a part of the second heat-conducting member 42 can be connected to the part of the first heat dissipating assembly 3 located outside the optical-mechanical housing 1, or a part of the second heat-conducting member 42 can be adjacent to the part of the first heat dissipating assembly 3 located outside the optical-mechanical housing 1 with a gap, which can not only increase the surface area of ​​the second heat-conducting member 42, but also reduce the volume of the projection device through reasonable structural arrangement. At the same time, a second airflow generator 41 is provided to make the second heat dissipation airflow Q2 generated by the second airflow generator 41 flow through the second heat-conducting member 42, the portion of the first heat dissipating component 3 located outside the optical machine housing 1, and the portion of the optical machine component 2 located outside the optical machine housing 1. This can improve the heat exchange efficiency between the second heat-conducting member 42 and the portion of the optical machine component 2 located outside the optical machine housing 1 and the air, and can also improve the heat exchange efficiency between the portion of the first heat dissipating component 3 located outside the optical machine housing 1 and the air, thereby improving the overall heat dissipation efficiency of the projection device.

[0072] In some possible embodiments of the present application, the projection device includes two second airflow generators 41, one second airflow generator 41 is located on a side of the second heat-conducting member 42 away from a portion of the optical-mechanical assembly 2 located outside the optical-mechanical housing 1, and the other second airflow generator 41 is located on a side of the portion of the optical-mechanical assembly 2 located outside the optical-mechanical housing 1 away from the second heat-conducting member 42; wherein the directions of the airflows generated by the two second airflow generators 41 are consistent.

[0073] In the present application embodiment, Figure 2 , Figure 3 and Figure 4 As shown, two second airflow generators 41 may be provided in the projection device to increase the exchange rate between the air in the housing 8 of the projection device and the outside air.

[0074] Exemplarily, two axial flow fans serving as the second airflow generator 41 may be arranged along the arrangement direction of the first heat conducting member 32 and the light concentrating member 23. For example, one axial flow fan is arranged on the side of the second heat conducting member 42 and the external heat dissipation structure 323 away from the light source assembly 22, and the other axial flow fan is arranged on the side of the light source assembly 22 away from the external heat dissipation structure 323. The two axial flow fans are arranged in the same direction, that is, the directions of the airflows generated by the two axial flow fans are consistent.

[0075] In the above embodiment, since two second airflow generators 41 are provided in the projection device, and the two second airflow generators 41 are respectively provided on both sides of the device with higher heat in the projection device, the flow speed of the air outside the optical machine housing 1 in the projection device can be accelerated by blowing air through one second airflow generator 41 and inhaling air through the other second airflow generator 41, thereby improving the heat exchange efficiency between the device with higher heat in the projection device and the air, and further improving the heat dissipation efficiency of the projection device.

[0076] In some possible embodiments of the present application, Figure 2 , Figure 3 and Figure 4 As shown, the projection device further includes a control component 5 , which is located outside the optical machine housing 1 and adjacent to the second heat-conducting member 42 , and is used to control the operating state of the projection device. The second heat dissipation airflow Q2 can flow through the control component 5 .

[0077] In the embodiment of the present application, the control component 5 in the projection device can be arranged outside the optical machine housing 1, and the control component 5 can be electrically connected to various devices in the projection device, so as to control the operation state of the projection device through the control component 5, such as controlling the projection device to start, shut down, play video, audio, etc. The control component 5 may include a circuit board and electrical components arranged on the circuit board.

[0078] For example, the control assembly 5 can be arranged at one side of the housing 8 along the arrangement direction of the two second airflow generators 41, such as being located adjacent to the second heat conducting member 42. In this way, the second heat dissipating airflow Q2 generated by the second airflow generator 41 can also flow through the control assembly 5.

[0079] In the above embodiment, since the control component 5 is arranged outside the optical machine housing 1 and in the area adjacent to the second heat conductor 42, the second heat dissipation airflow Q2 generated by the second airflow generator 41 can also flow through the control component 5, thereby improving the heat dissipation efficiency of the control component 5.

[0080] In some possible embodiments of the present application, Figure 2 , Figure 3 and Figure 4 As shown, the optical machine housing 1 also has a third opening 12 connected to the closed cavity 11; the projection device also includes a lens assembly 6 sealed and mounted on the third opening 12, the lens assembly 6 is located on the transmission path of the projection light generated by the optical machine assembly 2, and the axis of the lens assembly 6 is parallel to the flow direction of the second heat dissipation airflow Q2.

[0081] In the present application embodiment, Figure 2 As shown, a third opening 12 can be set on the optical machine housing 1, and the third opening 12 can be set as a through hole matching the lens assembly 6. The lens assembly 6 can be fixedly connected to the edge of the third opening 12 on the optical machine housing 1, and the lens assembly 6 and the optical machine housing 1 can be sealed.

[0082] For example, Figure 4 As shown, the lens assembly 6 can be arranged to be parallel or nearly parallel to the flow direction of the second heat dissipation airflow Q2. A reflector 9 can be arranged in the optical machine housing 1. For example, the reflector 9 can be a plane mirror, so that the reflector 9 can change the transmission direction of the projection light generated by the optical machine assembly 2 so that the projection light can be transmitted to the lens assembly 6.

[0083] As another example, an audio component may be disposed on the optical machine housing 1 , for example, the audio component may be fixedly disposed on the optical machine housing 1 at a position adjacent to the lens assembly 6 , so as to generate sound through the audio component.

[0084] In the above embodiment, since the lens assembly 6 is sealed and connected to the optical machine housing 1, the risk of dust entering the closed cavity 11 can be reduced. And the axis of the lens assembly 6 is parallel to the flow direction of the second heat dissipation airflow Q2, so the size of the projection device along the extension direction of the optical machine assembly 2 can be reduced.

[0085] In some possible embodiments of the present application, Figure 2 and Figure 4As shown, the projection device also includes a fixed cylinder 15, which has a heat dissipation hole 151; one end of the fixed cylinder 15 is connected to the edge of the second opening on the optical machine housing 1, and the part of the optical machine component 2 located outside the optical machine housing 1 is arranged in the fixed cylinder 15; the second heat dissipation airflow Q2 flows through the part of the optical machine component 2 located outside the optical machine housing 1 through the heat dissipation hole 151.

[0086] In the embodiment of the present application, in order to facilitate the installation of the light source assembly 22 , a fixing tube 15 may be provided on the optical machine housing 1 , so that the light source assembly 22 can be installed through the fixing tube 15 .

[0087] Exemplarily, the fixed tube 15 can be set as a tubular structure matching the focusing piece 23, and the fixed tube 15 can be sleeved outside the focusing piece 23, and one end of the fixed tube 15 can be fixedly connected to the optical machine housing 1, and the light source assembly 22 can be fixedly installed on the end of the fixed tube 15 away from the optical machine housing 1.

[0088] In another example, a plurality of heat dissipation holes 151 may be provided on the fixing tube 15 to connect the inside of the fixing tube 15 with the outside of the fixing tube 15. In this way, the second heat dissipation airflow Q2 may flow through the heat dissipation holes 151 through the light collecting member 23 and the light source assembly 22.

[0089] In the above embodiment, since the fixing cylinder 15 is provided on the optical machine housing 1, the light source assembly 22 in the optical machine assembly 2 can be installed on the optical machine housing 1 through the fixing cylinder 15. In addition, the heat dissipation hole 151 is provided on the fixing cylinder 15, so that the second heat dissipation airflow Q2 can flow through the light concentrator 23 and the light source assembly 22 through the heat dissipation hole 151 to improve the heat dissipation efficiency of the light concentrator 23 and the light source assembly 22.

[0090] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application is described in detail with reference to the above embodiments, a person skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some or all of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way.

Claims

1. A projection device, characterized in that: include: An optical machine housing (1), the optical machine housing (1) encloses a closed cavity (11) and has a first opening, the first opening connecting the closed cavity (11) with the outside of the optical machine housing (1); an optical-mechanical component (2), at least a portion of which is located in the closed cavity (11) and is used to generate projection light; A first heat dissipation component (3), a portion of which is installed in the closed cavity (11), and another portion of which extends to the outside of the optical machine housing (1) through the first opening, and the first heat dissipation component (3) is sealed to the edge of the first opening on the optical machine housing (1), and the first heat dissipation component (3) is used to transfer heat generated by the optical machine component (2) in the closed cavity (11) to the outside of the optical machine housing (1).

2. The projection device according to claim 1, characterized in that: The optical machine housing (1) also has a second opening connected to the closed cavity (11); the optical machine component (2) comprises an imaging component (21) and a light source component (22); the imaging component (21) and the light source component (22) are arranged relatively at the second opening, and the imaging component (21) is located in the closed cavity (11); the light source component (22) is located outside the optical machine housing (1); and the light source component (22) is sealed to the edge of the second opening on the optical machine housing (1); and the illumination light generated by the light source component (22) is transmitted to the imaging component (21) through the second opening.

3. The projection device according to claim 2, characterized in that: The first heat dissipation component (3) comprises a first airflow generator (31) and a first heat-conducting member (32); a portion of the first heat-conducting member (32) is located in the closed cavity (11) and is adjacent to the imaging component (21), and another portion extends to the outside of the optical machine housing (1) through the first opening, and the first heat-conducting member (32) is sealed to the edge of the first opening on the optical machine housing (1); the first airflow generator (31) is installed in the closed cavity (11) and is located on a side of the first heat-conducting member (32) away from the imaging component (21), and the first airflow generator (31) is used to form a first heat dissipation airflow that flows through the first heat-conducting member (32) and the imaging component (21) in sequence.

4. The projection device according to claim 3, characterized in that: The closed cavity (11) also has a return channel (13), and the return channel (13) extends along the arrangement direction of the first airflow generator (31), the first heat-conducting component (32) and the imaging component (21), and is located between the cavity wall of the closed cavity (11) and the first airflow generator (31), the first heat-conducting component (32) and the imaging component (21); the air inlet of the first airflow generator (31) faces one end of the return channel (13), and the air outlet of the first airflow generator (31) faces the first heat-conducting component (32), and the imaging component (21) has a heat dissipation duct; wherein, after the first heat dissipation airflow flows through the heat dissipation duct, it enters the end of the return channel (13) away from the air inlet.

5. The projection device according to claim 3, characterized in that: The first heat-conducting member (32) comprises a heat transfer structure (321), an internal heat dissipation structure (322) and an external heat dissipation structure (323); the internal heat dissipation structure (322) is at least partially located in the closed cavity (11); the external heat dissipation structure (323) is at least partially located outside the optical machine housing (1); the internal heat dissipation structure (322) and the external heat dissipation structure (323) are connected via the heat transfer structure (321); the heat transfer structure (321) comprises at least one of the following: a semiconductor refrigerator, a heat pipe, thermal grease and a thermal pad.

6. The projection device according to any one of claims 1 to 5, characterized in that: The optical machine housing (1) further comprises a second airflow generator (41) and a second heat-conducting member (42); a portion of the second heat-conducting member (42) is adjacent to a portion of the first heat-dissipating assembly (3) located outside the optical machine housing (1), and another portion is connected to a portion of the optical machine housing (2) located outside the optical machine housing (1); the second airflow generator (41) and the second heat-conducting member (42) are arranged correspondingly to form a second heat-dissipating airflow, the second heat-dissipating airflow flowing through the second heat-conducting member (42), a portion of the first heat-dissipating assembly (3) located outside the optical machine housing (1), and a portion of the optical machine housing (2) located outside the optical machine housing (1).

7. The projection device according to claim 6, characterized in that: The invention comprises two second airflow generators (41), one of the second airflow generators (41) being located on a side of the second heat-conducting member (42) away from a portion of the optical-mechanical assembly (2) located outside the optical-mechanical housing (1), and the other second airflow generator (41) being located on a side of a portion of the optical-mechanical assembly (2) located outside the optical-mechanical housing (1) away from the second heat-conducting member (42); wherein the directions of the airflows generated by the two second airflow generators (41) are consistent.

8. The projection device according to claim 6, characterized in that: It also includes a control component (5), which is located outside the optical machine housing (1) and adjacent to the second heat-conducting member (42) and is used to control the operating state of the projection device. The second heat dissipation airflow can flow through the control component (5).

9. The projection device according to claim 6, characterized in that: The optical machine housing (1) also has a third opening (12) connected to the closed cavity (11); the projection device also includes a lens assembly (6) sealed and mounted on the third opening (12), the lens assembly (6) being located on the transmission path of the projection light generated by the optical machine assembly (2), and the axis of the lens assembly (6) is parallel to the flow direction of the second heat dissipation airflow.

10. The projection device according to claim 6, characterized in that: The invention also comprises a fixing tube (15), wherein the fixing tube (15) has a heat dissipation hole (151); one end of the fixing tube (15) is connected to the edge of a second opening on the optical machine housing (1); a portion of the optical machine assembly (2) located outside the optical machine housing (1) is arranged in the fixing tube (15); and the second heat dissipation airflow flows through the portion of the optical machine assembly (2) located outside the optical machine housing (1) through the heat dissipation hole (151).

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