Projection equipment and projection system

Abstract

The invention provides projection equipment and a projection system, and relates to the technical field of projection, and the projection equipment comprises a housing which is internally provided with a containing cavity and a first cavity, and the containing cavity and the first cavity are adjacently arranged and are separated from each other; a liquid inlet and a liquid outlet which are communicated with the first cavity are formed in the shell; the color wheel is located in the containing cavity and located on the side, close to the first cavity, of the containing cavity. The heat dissipation assembly is provided with a liquid inlet pipe and a liquid outlet pipe; the liquid inlet pipe is communicated with the liquid inlet, so that cooling liquid in the liquid inlet pipe flows into the first cavity through the liquid inlet; and the liquid outlet pipe is communicated with the liquid outlet, so that the cooling liquid in the first cavity flows into the liquid outlet pipe through the liquid outlet. According to the projection equipment and the projection system provided by the invention, the heat dissipation efficiency of the heat dissipation assembly on the color wheel can be improved.

Description

Technical Field

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

[0002] Projection equipment is increasingly being used in people's lives and work. Laser projection is gaining market share due to its wide color gamut, high brightness, and long lifespan. Laser projection equipment typically consists of a laser, a color wheel, and a DMD (Digital Micromirror Device). Laser light from the laser is directed toward the color wheel, which separates and filters the laser light and then directs it toward the DMD, which reflects the laser light to form a projected image.

[0003] The color wheel will generate heat after being irradiated by the laser. The temperature rise of the color wheel will affect the normal operation of the projection device. In the prior art, a heat dissipation component is often used to dissipate heat from the color wheel to ensure the normal operation of the projection device.

[0004] However, the existing heat dissipation assembly has low efficiency in dissipating heat from the color wheel. Summary of the Invention

[0005] In view of the above problems, the present application provides a projection device and a projection system, which can improve the efficiency of the heat dissipation component in dissipating heat from the color wheel.

[0006] In order to achieve the above objectives, this application provides the following technical solutions:

[0007] A first aspect of the present application provides a projection device, comprising:

[0008] The housing has an accommodating cavity and a first cavity inside the housing, the accommodating cavity and the first cavity are adjacently arranged and separated from each other; the housing is provided with a liquid inlet and a liquid outlet connected to the first cavity;

[0009] A color wheel is located in the accommodating cavity and on a side of the accommodating cavity close to the first cavity;

[0010] The heat dissipation component has a liquid inlet pipe and a liquid outlet pipe; the liquid inlet pipe is connected to the liquid inlet so that the coolant in the liquid inlet pipe flows into the first cavity through the liquid inlet; the liquid outlet pipe is connected to the liquid outlet so that the coolant in the first cavity flows into the liquid outlet pipe through the liquid outlet.

[0011] The beneficial effects of the present application are as follows: the heat of the color wheel can be transferred to the shell through the air, and the coolant in the heat dissipation component can flow through the first cavity in the shell, thereby taking away the heat from the shell, achieving the effect of indirectly cooling the color wheel; the thermal resistance on the entire heat transfer path is low, which can improve the efficiency of the heat dissipation component in dissipating heat to the color wheel.

[0012] In a possible implementation, the housing includes a first housing and a second housing connected to each other. The first housing and the second housing surround a receiving cavity, and the first cavity is located inside the first housing.

[0013] In a possible implementation, the accommodating cavity is concave, the first shell has a groove adapted to the accommodating cavity, and at least a portion of the color wheel is located in the groove.

[0014] In a possible implementation, along the thickness direction of the color wheel, part of the first cavity is disposed opposite to one side surface of the color wheel, and part of the first cavity is disposed opposite to the other side surface of the color wheel.

[0015] In one possible implementation, a partition is provided on the first shell and is located in the first cavity; the partition divides the first cavity into multiple sub-channels, one end of the sub-channel is connected to the liquid inlet, and the other end of the sub-channel is connected to the liquid inlet.

[0016] In a possible implementation, the projection device further includes a laser, which is located in the accommodating cavity, and the light emission direction of the laser is toward the color wheel;

[0017] The interior of the second shell has a second cavity, the accommodating cavity and the second cavity are adjacently arranged and separated from each other, and the laser is located on the side of the accommodating cavity close to the second cavity; the flow channel of the heat dissipation component passes through the second cavity, and the first cavity and the second cavity are arranged in series or in parallel in the flow channel of the heat dissipation component.

[0018] In a possible implementation, the first cavity and the second cavity are disposed adjacent to each other, and the two cooperate with each other and wrap at least a portion of the accommodating cavity.

[0019] In a possible implementation, the projection device further includes a cooling element, which is located outside the housing, and the laser is thermally connected to the cooling element.

[0020] In one possible implementation, the heat dissipation assembly also includes a driving member, a first fan and a water drain, wherein the end of the liquid inlet pipe away from the liquid inlet is connected to the internal cavity of the water drain, and the end of the liquid outlet pipe away from the liquid outlet is connected to the internal cavity of the water drain; the driving member is arranged on one of the liquid inlet pipe and the liquid outlet pipe; the water drain is located on the path of the airflow generated by the first fan.

[0021] In a possible implementation, the liquid inlet is located on top of the liquid outlet in the vertical direction;

[0022] And / or, the projection device further includes a control component, which is electrically connected to a driving component in the heat dissipation assembly, and the control component is used to control a working state of the driving component to adjust a flow direction of the coolant in the flow channel of the heat dissipation assembly.

[0023] A second aspect of the present application provides a projection device, comprising:

[0024] The housing, the accommodating cavity and the first cavity inside the housing are arranged adjacent to each other and separated from each other; the housing is used to provide a liquid inlet and a liquid outlet connected to the first cavity;

[0025] A color wheel is configured to be disposed in the accommodating cavity and is configured to be disposed on a side of the accommodating cavity close to the first cavity;

[0026] The heat dissipation component, the liquid inlet pipe of the heat dissipation component is used to be connected to the liquid inlet so that the coolant in the liquid inlet pipe flows into the first cavity through the liquid inlet; the liquid outlet pipe of the heat dissipation component is used to be connected to the liquid outlet so that the coolant in the first cavity flows into the liquid outlet pipe through the liquid outlet.

[0027] A third aspect of the present application provides a projection system, comprising a projection screen and a projection device according to any one of the above implementations, wherein the projection device is configured to project a projection image onto the projection screen.

[0028] When the projection device of the present application is in use, the coolant in the heat dissipation assembly can flow through the inside of the shell and directly exchange heat with the shell, reducing the thermal resistance on the heat transfer path, thereby improving the efficiency of the heat dissipation assembly in dissipating heat to the color wheel. In addition, since the color wheel is located on the side of the accommodating cavity close to the first cavity, the heat of the color wheel can be more efficiently transferred to the shell at the first cavity, and the heat is carried away by the coolant in the first cavity, thereby further improving the heat dissipation efficiency of the color wheel. In addition, since the coolant in the heat dissipation assembly flows through the first cavity located inside the shell, the first cavity becomes part of the flow channel on the heat dissipation assembly, and the integration between the heat dissipation assembly and the shell is improved, thereby making the projection device more compact and taking up less space.

[0029] The structure of the present application and its other inventive objectives and beneficial effects will be more clearly understood through the description of specific embodiments in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0031] Figure 1 A top view of some components inside the projection device provided in an embodiment of the present application;

[0032] Figure 2A three-dimensional diagram of some components inside the projection device provided in an embodiment of the present application;

[0033] Figure 3 for Figure 2 A view after removing the cooling element;

[0034] Figure 4 For Figure 3 The corresponding main view;

[0035] Figure 5 for Figure 4 Cross-sectional view at AA in the middle;

[0036] Figure 6 A three-dimensional view of a housing provided in an embodiment of the present application;

[0037] Figure 7 An exploded view of a housing provided in an embodiment of the present application;

[0038] Figure 8 A left side view of the color wheel and the first housing provided in an embodiment of the present application;

[0039] Figure 9 for Figure 8 Cross-sectional view at the middle BB;

[0040] Figure 10 A three-dimensional cross-sectional view of the color wheel and the first shell provided in an embodiment of the present application;

[0041] Figure 11 For Figure 5 another corresponding cross-sectional view;

[0042] Figure 12 A schematic diagram of the projection device provided in an embodiment of the present application projecting onto a projection screen.

[0043] Description of reference numerals:

[0044] 10-projection device; 100-housing;

[0045] 110-first shell; 111-first cavity;

[0046] 111A-sub-flow channel; 112-separator;

[0047] 113-groove; 120-second housing;

[0048] 121 - second cavity; 130 - accommodating cavity;

[0049] 140-liquid inlet; 150-liquid outlet;

[0050] 200-color wheel; 300-heat dissipation component;

[0051] 310-liquid inlet pipe; 320-liquid outlet pipe;

[0052] 330-driving member; 340-first fan;

[0053] 350-water pump; 400-laser;

[0054] 500-cooling element; 510-first heat dissipation fin;

[0055] 520-second fan; 600-DMD assembly;

[0056] 700-lens; 800-housing;

[0057] 910-Laser; 920-Heat conduction block;

[0058] 930-second heat sink; 20-projection screen. DETAILED DESCRIPTION

[0059] Laser projection equipment consists of a laser, a color wheel, and a DMD. Laser light from the laser is directed toward the color wheel, which separates and filters the laser light and directs it toward the DMD. The DMD reflects the laser light and directs it toward the projection screen, where it forms a projected image. During operation, the color wheel heats up after being irradiated by the laser light, and this increased temperature can affect the normal operation of the projection device.

[0060] In the prior art, a heat sink assembly is often used to dissipate heat from the color wheel to ensure proper operation of the projection device. For example, this assembly utilizes a metal module with high thermal conductivity to absorb heat from the surrounding housing of the fluorescent wheel and transfer the heat to heat sink fins. This heat is then dissipated by a fan, indirectly cooling the fluorescent wheel. However, when dissipating heat from the color wheel with this existing heat sink assembly, the thermal resistance along the heat transfer path is high, resulting in low heat dissipation efficiency.

[0061] Based on the above-mentioned problems, embodiments of the present application provide a projection device and a projection system. The projection system includes a projection device, a housing, a color wheel, and a heat dissipation assembly. The housing has a receiving cavity and a first cavity, the receiving cavity and the first cavity being adjacently arranged and separated from each other. The housing is provided with a liquid inlet and a liquid outlet connected to the first cavity. The color wheel is located in the receiving cavity and on a side of the receiving cavity adjacent to the first cavity. The heat dissipation assembly has a liquid inlet pipe connected to the liquid inlet so that coolant in the liquid inlet pipe flows into the first cavity through the liquid inlet. The heat dissipation assembly has a liquid outlet pipe connected to the liquid outlet so that coolant in the first cavity flows into the liquid outlet pipe through the liquid outlet. Thus, heat from the color wheel can be transferred to the housing through air, and coolant in the heat dissipation assembly can flow through the first cavity in the housing, thereby removing heat from the housing and achieving the effect of indirectly cooling the color wheel. The low thermal resistance along the entire heat transfer path can improve the efficiency of the heat dissipation assembly in dissipating heat from the color wheel.

[0062] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0063] The following specific embodiments are used to describe in detail the technical solution of the present application and how the technical solution of the present application solves the above technical problems. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments.

[0064] The following combination Figures 1 to 12 , the structure of the projection device and projection system provided in the embodiments of the present application is described in detail.

[0065] like Figures 1 to 5 As shown, the projection device 10 provided in this application includes:

[0066] The housing 100 has a housing chamber 130 and a first cavity 111 within it. The housing chamber 130 and the first cavity 111 are adjacently arranged and separated from each other. It should be noted that the housing chamber 130 and the first cavity 111 are both located within the housing 100 and can be separated by a plate within the housing 100. The two do not affect each other and the sealing of both is guaranteed. In addition, the housing 100 is provided with a liquid inlet 140 and a liquid outlet 150 connected to the first cavity 111, thereby facilitating the flow of liquid into the first cavity 111 through the liquid inlet 140 and the outflow of liquid in the first cavity 111 through the liquid outlet 150.

[0067] The color wheel 200 is located in the accommodating cavity 130 and is located on the side of the accommodating cavity 130 close to the first cavity 111. It should be noted that the color wheel 200 is connected to the color wheel motor, and the color wheel motor can drive the color wheel 200 to rotate. At the same time, the surface of the color wheel 200 is coated with fluorescent material. When the laser 910 emitted by the laser 400 is directed at the color wheel 200, the rotating color wheel 200 can separate and filter the laser 910. Since the color wheel 200 is irradiated by the laser 910 during operation, the color wheel 200 will generate heat after absorbing part of the laser 910.

[0068] The heat dissipation assembly 300 includes a liquid inlet pipe 310 and a liquid outlet pipe 320. The liquid inlet pipe 310 communicates with the liquid inlet port 140, allowing coolant in the liquid inlet pipe 310 to flow into the first cavity 111 through the liquid inlet port 140. The liquid outlet pipe 320 communicates with the liquid outlet port 150, allowing coolant in the first cavity 111 to flow into the liquid outlet pipe 320 through the liquid outlet port 150. Thus, coolant in the heat dissipation assembly 300 can flow into the first cavity 111 through the liquid inlet pipe 310, while coolant in the first cavity 111 can flow out through the liquid outlet pipe 320.

[0069] Thus, during use of the projection device 10 approved by the present application, the heat emitted by the color wheel 200 located in the accommodating cavity 130 can be transferred to the housing 100 through the air, and the housing 100 can indirectly absorb the heat of the color wheel 200; and the presence of the heat dissipation component 300 allows the coolant to flow through the first cavity 111 located inside the housing 100. Since the temperature of the coolant is lower than the temperature of the housing, the coolant can take away the heat of the housing 100, so that the housing 100 can continuously absorb the heat of the color wheel 200, thereby achieving the effect of dissipating heat from the color wheel 200.

[0070] It should be noted that the coolant in the heat dissipation assembly 300 of the present application can flow through the interior of the housing 100, directly exchanging heat with the housing 100. This reduces the thermal resistance along the entire heat transfer path, thereby improving the efficiency of the heat dissipation assembly 300 in dissipating heat from the color wheel 200. Furthermore, because the color wheel 200 is located on the side of the accommodating cavity 130 close to the first cavity 111, heat from the color wheel 200 can be more efficiently transferred to the housing 100 at the first cavity 111, and the heat is carried away by the coolant in the first cavity 111, further improving the heat dissipation efficiency of the color wheel 200.

[0071] In addition, since the cooling liquid in the heat dissipation assembly 300 flows through the first cavity 111 located inside the shell 100, the first cavity 111 becomes part of the flow channel on the heat dissipation assembly 300, and the integration between the heat dissipation assembly 300 and the shell 100 is improved, thereby making the projection device 10 more compact and occupying less space.

[0072] In the embodiments of this application, Figures 5 to 7 As shown, the housing 100 includes a first housing 110 and a second housing 120 connected to each other. The first housing 110 and the second housing 120 enclose a receiving cavity 130, with a first cavity 111 located within the first housing 110. It should be noted that when the first and second housings 110 and 120 are connected, recesses in the first housing 110 and / or the second housing 120 form the receiving cavity 130. The receiving cavity 130 and the first cavity 111 are separated by a plate on the first housing 110. This arrangement facilitates the installation of the color wheel 200 or other components within the receiving cavity 130 by disassembling and installing the first and second housings 110 and 120. Alternatively, the first and second housings 110 and 120 may be adhesively bonded, or they may be removably connected using detachable members, such as screws, bolts, or nuts.

[0073] For example, Figure 5 As shown, the accommodating cavity 130 is concave, and the first shell 110 has a groove 113 adapted to the accommodating cavity 130, and the accommodating cavity 130 can partially wrap the groove 113; in addition, at least part of the color wheel 200 is located in the groove 113, so that the accommodating cavity 130 can partially wrap the color wheel 200 located in the groove 113. With this arrangement, the color wheel 200 located in the groove 113 can quickly transfer heat to the groove wall of the groove 113 in multiple directions; and after the accommodating cavity 130 partially wraps the groove 113, the coolant in the accommodating cavity 130 can quickly absorb the heat at the groove wall of the groove 113, thereby further improving the heat dissipation efficiency of the color wheel 200. Specifically, as Figure 5 As shown, part of the color wheel 200 is located in the groove 113, and the other part is located outside the groove 113. It should be noted that when the first shell 110 and the second shell 120 are connected to each other, the groove 113 becomes a part of the accommodating cavity 130.

[0074] For example, Figure 5 and Figure 10 As shown, along the thickness direction of the color wheel 200, a portion of the first cavity 111 is disposed opposite one side of the color wheel 200, while a portion of the first cavity 111 is disposed opposite the other side of the color wheel 200. It should be noted that the color wheel 200 is sheet-shaped, and the two side surfaces of the color wheel 200 along the thickness direction are the primary heat-generating surfaces. When the first cavity 111 is disposed opposite the two side surfaces of the color wheel 200, the heat generated by the two side surfaces of the color wheel 200 can be quickly transferred to the first cavity 111 and carried away by the coolant, thereby further improving the heat dissipation efficiency of the color wheel 200.

[0075] For example, Figures 8 to 10 As shown, a partition 112 is provided on the first housing 110, and the partition 112 is located in the first cavity 111; the partition 112 divides the first cavity 111 into multiple sub-channels 111A, one end of each sub-channel 111A is connected to the liquid inlet 140, and the other end of each sub-channel 111A is connected to the liquid inlet 140. With this arrangement, after the partition 112 divides the first cavity 111 into multiple sub-channels 111A, the coolant flowing in from the liquid inlet 140 can flow into the multiple sub-channels 111A respectively, making the coolant more evenly distributed in the first cavity 111, thereby improving the cooling uniformity of the coolant on the first housing 110, and then improving the heat dissipation effect on the color wheel 200. Specifically, the partition 112 can be a partition plate. It should be noted that the sub-channels 111A and the liquid inlet 140 are connected, and the two can be directly connected, or the two can be indirectly connected through other channels.

[0076] In a specific embodiment, Figure 10 As shown, the partition 112 can separate the first cavity 111 into two sub-channels 111A that are connected to each other. The two sub-channels 111A are respectively arranged in a one-to-one correspondence with the surfaces of two different sides of the color wheel 200 along the thickness direction; and the liquid inlet 140 can be directly connected to the two sub-channels 111A at the same time, and the liquid outlet 150 is directly connected to one of the two sub-channels 111A.

[0077] In the embodiments of this application, Figure 11 As shown, the projection device 10 further includes a laser 400, which is located in the accommodating cavity 130. The laser 400 emits light in a direction toward the color wheel 200, and the laser light 910 emitted by the laser 400 can be directed toward the color wheel 200. Furthermore, the interior of the second housing 120 includes a second cavity 121. The accommodating cavity 130 and the second cavity 121 are adjacently disposed and separated from each other; specifically, the accommodating cavity 130 and the second cavity 121 are separated by a shell plate on the second housing 120. The laser 400 is located on a side of the accommodating cavity 130 near the second cavity 121. The flow path of the heat dissipation assembly 300 passes through the second cavity 121. Thus, the coolant of the heat dissipation assembly 300 can flow through the second cavity 121, and the heat generated during operation of the laser 400 can be transferred to the second housing 120. The coolant flowing in the second cavity 121 can quickly remove the heat from the second housing 120. Thus, the heat dissipation assembly 300 can cool the first housing 110 and the second housing 120 at the same time. Figure 5 As shown, the second housing 120 may not be provided with the second cavity 121 , and the heat dissipation assembly 300 only cools the first housing 110 .

[0078] In addition, the first cavity 111 and the second cavity 121 are arranged in series or in parallel in the flow channel of the heat dissipation assembly 300. When the first cavity 111 and the second cavity 121 are arranged in series in the flow channel of the heat dissipation assembly 300, the first cavity 111 and the second cavity 121 are connected by a pipeline, and the coolant can flow through the first cavity 111 and the second cavity 121 in sequence, or through the second cavity 121 and the first cavity 111 in sequence. When the first cavity 111 and the second cavity 121 are arranged in parallel in the flow channel of the heat dissipation assembly 300, the flow channel of the heat dissipation assembly 300 is divided into two parallel channels, one channel flows through the first cavity 111 and can cool the first shell 110, and the other channel flows through the second cavity 121 and can cool the second shell 120.

[0079] For example, Figure 11 As shown, the first cavity 111 and the second cavity 121 are disposed adjacent to each other, cooperating with each other and enclosing at least a portion of the accommodating cavity 130. Because the color wheel 200 and the laser 400 are located in the accommodating cavity 130, the heat from the color wheel 200 and the laser 400 can be transferred to the air in the accommodating cavity 130. Because the first cavity 111 and the second cavity 121 cooperate with each other and enclose the accommodating cavity 130, the coolant in the first cavity 111 and the second cavity 121 can quickly remove the heat from the air in the accommodating cavity 130, ensuring efficient heat dissipation for the color wheel 200 and the laser 400. Specifically, the first cavity 111 and the second cavity 121 cooperate with each other to enclose the entire accommodating cavity 130.

[0080] Further, such as Figure 2 and Figure 3 As shown, the projection device 10 further includes a cooling member 500, which is located outside the housing 100, and is thermally connected to the laser 400 and the cooling member 500. With this arrangement, the cooling member 500 can further dissipate heat from the laser 400, further ensuring the normal operation of the laser 400. Specifically, the cooling member 500 may include a first heat dissipating fin 510 and a second fan 520. The first heat dissipating fin 510 can be thermally connected to the laser 400 through a heat conducting block 920. The heat generated by the laser 400 can be transferred to the heat conducting block 920, and the heat conducting block 920 can transfer the heat to the first heat dissipating fin 510; the airflow generated by the second fan 520 can blow toward the first heat dissipating fin 510, so that the heat of the first heat dissipating fin 510 can be quickly transferred to the air outside the housing 100.

[0081] In the embodiments of this application, Figure 3 and Figure 4As shown, the heat dissipation assembly 300 also includes a driving member 330, a first fan 340 and a water drain 350. The end of the liquid inlet pipe 310 away from the liquid inlet 140 is connected to the internal cavity of the water drain 350, and the end of the liquid outlet pipe 320 away from the liquid outlet 150 is connected to the internal cavity of the water drain 350; the driving member 330 is arranged on one of the liquid inlet pipe 310 and the liquid outlet pipe 320; the water drain 350 is located on the path of the wind flow generated by the first fan 340, and the wind flow can pass through the water drain 350 and take away the heat of the water drain 350. Thus, driven by the driving member 330, the low-temperature coolant in the water row 350 can be input into the first cavity 111 through the liquid inlet pipe 310. The coolant in the first cavity 111 can absorb the heat of the housing 100, thereby achieving the effect of cooling the color wheel 200. Then, the coolant in the first cavity 111 that has absorbed the heat can flow back into the water row 350 through the liquid outlet pipe 320. The wind generated by the first fan 340 can remove the heat of the coolant in the water row 350. The cooled coolant is then continuously input into the first cavity 111 through the liquid inlet pipe 310. This cycle is repeated continuously, thereby continuously cooling the color wheel 200.

[0082] Specifically, the drive member 330 can be disposed on the liquid outlet pipe 320 and is a water pump capable of adjusting the flow direction of the water. The housing 100 is made of copper-aluminum, which has excellent thermal conductivity. The liquid inlet pipe 310 and the liquid outlet pipe 320 can be hoses, and the refrigerant can be a mixture of water and antifreeze. The water drain 350 is made of aluminum alloy and has multiple heat dissipation channels within it. The first fan 340 is disposed on one side of the water drain 350, and the airflow generated by the first fan 340 is blown toward the heat dissipation channels, thereby cooling the coolant within the water drain 350. In addition, the airflow generated by the first fan 340 can form an uneven pressure and velocity field within the projection device 10, carrying heat to the exterior of the projection device 10 through the air flow, thereby controlling the temperature of the entire projection device 10.

[0083] In the embodiments of this application, Figure 5 As shown, in the vertical direction, the liquid inlet 140 is located at the top of the liquid outlet 150; with this arrangement, the direction of gravity and the flow direction of the coolant in the first cavity 111 can be kept consistent, so that gravity can be used to accelerate the flow of the coolant in the first cavity 111, and the coolant can quickly take away the heat, thereby improving the heat dissipation efficiency.

[0084] In addition, the projection device 10 further includes a control unit, which may be a programmable logic controller. The control unit is electrically connected to the driver 330 in the heat dissipation assembly 300 and is configured to control the operating state of the driver 330 to adjust the flow direction of the coolant in the flow channel of the heat dissipation assembly 300. By controlling the driver 330 to change the flow direction of the coolant, the flow direction of the coolant in the first cavity 111 is aligned with the direction of gravity, thereby improving heat dissipation efficiency. It should be noted that the liquid inlet 140 and the liquid outlet 150 on the shell 100 can be converted into each other during use; for example, in one working scenario, the two openings on the shell 100 form the liquid inlet 140 and the liquid outlet 150 respectively. At this time, the upper opening of the two openings is the liquid inlet 140, and the lower opening is the liquid outlet 150, so as to ensure that the direction of gravity is consistent with the flow direction of the coolant in the first cavity 111; in another working scenario, when the projection device 10 is flipped in position, the opening originally as the liquid inlet is located at the bottom, and the opening originally as the liquid outlet is located at the top. At this time, the working state of the driving member 330 can be adjusted and the flow direction of the coolant can be changed, so that the original liquid inlet becomes the liquid outlet, and the original liquid outlet becomes the liquid inlet.

[0085] It should be noted that the control component can control the operating state of the driving component 330 based on the direction of gravity to ensure that the flow direction of the coolant in the first cavity 111 is consistent with the direction of gravity. Specifically, the direction of gravity can be determined by identifying the projection image of the projection device 10; alternatively, the projection device 10 can be provided with a gravity sensor to determine the direction of gravity.

[0086] In the embodiment of the present application, the projection device 10 further includes a DMD assembly 600 and a lens 700. The DMD assembly 600 includes a heat sink and a DMD chip, with the DMD chip being located within the heat sink. Thus, the laser light 910 emitted by the laser 400 is directed toward the color wheel 200. The color wheel 200 can separate and filter the laser light 910 and direct the laser light 910 toward the DMD chip. After the DMD chip reflects the laser light 910, the laser light 910 is directed through the lens 700 toward the projection screen 20. Furthermore, the projection device 10 further includes second heat sink fins 930. The second heat sink fins 930 are in contact with the heat sink, thereby forming a thermal connection. Heat generated by the DMD chip can be transferred to the heat sink through the air, and heat from the heat sink can be transferred to the second heat sink fins 930. Furthermore, the airflow direction of the first fan 340 is directed toward the water drain 350 as well as the second heat sink fins 930, thereby accelerating the heat dissipation and cooling of the second heat sink fins 930.

[0087] In addition, an embodiment of the present application further provides a projection device 10, including a shell 100, a color wheel 200 and a heat dissipation assembly 300; the accommodating chamber 130 and the first cavity 111 located inside the shell 100 are configured to be adjacently arranged and separated from each other, and the shell 100 is used to provide a liquid inlet 140 and a liquid outlet 150 connected to the first cavity 111; in addition, the color wheel 200 is configured to be arranged in the accommodating chamber 130, and is configured to be arranged on a side of the accommodating chamber 130 close to the first cavity 111; in addition, the liquid inlet pipe 310 of the heat dissipation assembly 300 is used to be connected to the liquid inlet 140 so that the coolant in the liquid inlet pipe 310 flows into the first cavity 111 through the liquid inlet 140; the liquid outlet pipe 320 of the heat dissipation assembly 300 is used to be connected to the liquid outlet 150 so that the coolant in the first cavity 111 flows into the liquid outlet pipe 320 through the liquid outlet 150. Thus, the coolant in the heat dissipation assembly 300 can flow through the first cavity 111 located inside the housing 100, and the coolant takes away the heat of the housing 100, so that the housing 100 can continuously absorb the heat of the color wheel 200, achieving the effect of efficient heat dissipation of the color wheel 200.

[0088] Based on the above embodiments, the present application further provides a projection system, including a projection screen 20 and the projection device 10 in any one of the above embodiments, wherein the projection device 10 is used to project a projection image onto the projection screen 20 .

[0089] Specifically, such as Figure 12 As shown, the projection device 10 has a housing 800, and the interior of the housing 800 has a receiving cavity, in which the housing 100, the color wheel 200, the heat dissipation component 300, the DMD component 600, and the lens 700 are all located. Figure 12 The figure also shows a scene diagram of the projection device 10 projecting onto the projection screen 20. The projection screen 20 is located diagonally above the projection device 10 and can be mounted on a flat mounting surface such as a wall to ensure the flatness of the projection screen 20. Thus, laser light 910 emitted by the laser 400 is directed toward the color wheel 200. The color wheel 200 is capable of color separation and filtering the laser light 910 and directing the laser light 910 toward the DMD chip in the DMD assembly 600. After the DMD chip reflects the laser light 910, the laser light 910 is directed toward the projection screen 20 through the lens 700, forming a projected image on the projection screen 20.

[0090] In the description of the present application, it should be understood that, in addition, the terms "including" and "having" and any variations thereof are intended to cover but not exclude inclusion. The orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "back", "left", "right", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In the description of the present application, it should be noted that, unless otherwise expressly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0091] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

[0092] For ease of explanation, the above description has been presented in conjunction with specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or to limit the embodiments to the specific forms disclosed above. Based on the above teachings, various modifications and variations are possible. The above embodiments have been selected and described to better explain the principles and practical applications, thereby enabling those skilled in the art to better utilize the embodiments and various variations of the embodiments suitable for specific use considerations.

Claims

1. A projection device, characterized in that: include: A housing, wherein the housing has an accommodating cavity and a first cavity therein, the accommodating cavity and the first cavity are adjacently arranged and separated from each other; the housing is provided with a liquid inlet and a liquid outlet communicated with the first cavity; a color wheel, the color wheel being located in the accommodating cavity and on a side of the accommodating cavity close to the first cavity; A heat dissipation component having a liquid inlet pipe and a liquid outlet pipe; the liquid inlet pipe is connected to the liquid inlet so that the coolant in the liquid inlet pipe flows into the first cavity through the liquid inlet; the liquid outlet pipe is connected to the liquid outlet so that the coolant in the first cavity flows into the liquid outlet pipe through the liquid outlet.

2. The projection device according to claim 1, wherein: The shell includes a first shell and a second shell connected to each other. The first shell and the second shell surround the accommodating cavity, and the first cavity is located inside the first shell.

3. The projection device according to claim 2, characterized in that The accommodating cavity is concave, and the first shell has a groove adapted to the accommodating cavity, and at least a portion of the color wheel is located in the groove; And / or, along the thickness direction of the color wheel, part of the first cavity is arranged opposite to one side surface of the color wheel, and part of the first cavity is arranged opposite to the other side surface of the color wheel.

4. The projection device according to claim 2, characterized in that A partition is provided on the first shell and is located in the first cavity; the partition divides the first cavity into a plurality of sub-channels, one end of each sub-channel is connected to the liquid inlet, and the other end of each sub-channel is connected to the liquid inlet.

5. The projection device according to any one of claims 2 to 4, characterized in that: It also includes a laser, the laser is located in the accommodating cavity, and the light emitting direction of the laser is toward the color wheel; The second housing has a second cavity inside, the accommodating cavity and the second cavity are adjacently arranged and separated from each other, and the laser is located on a side of the accommodating cavity close to the second cavity; The flow channel of the heat dissipation component passes through the second cavity, and the first cavity and the second cavity are arranged in series or in parallel in the flow channel of the heat dissipation component.

6. The projection device according to claim 5, characterized in that The first cavity and the second cavity are arranged adjacent to each other, cooperate with each other and wrap at least a portion of the accommodating cavity; And / or, the projection device further includes a cooling element, the cooling element is located outside the housing, and the laser is thermally connected to the cooling element.

7. The projection device according to any one of claims 1 to 4, characterized in that: The heat dissipation assembly also includes a driving member, a first fan and a water drain, wherein the end of the liquid inlet pipe away from the liquid inlet is connected to the internal cavity of the water drain, and the end of the liquid outlet pipe away from the liquid outlet is connected to the internal cavity of the water drain; the driving member is arranged on one of the liquid inlet pipe and the liquid outlet pipe; the water drain is located on the path of the airflow generated by the first fan.

8. The projection device according to any one of claims 1 to 4, characterized in that: In the vertical direction, the liquid inlet is located at the top of the liquid outlet; And / or, the projection device further includes a control component, which is electrically connected to a driving component in the heat dissipation component, and the control component is used to control the working state of the driving component to adjust the flow direction of the coolant in the flow channel of the heat dissipation component.

9. A projection device, characterized in that: include: A housing, wherein the accommodating cavity and the first cavity inside the housing are arranged adjacent to each other and separated from each other; the housing is used to provide a liquid inlet and a liquid outlet communicating with the first cavity; a color wheel, the color wheel being configured to be disposed in the accommodating cavity and being configured to be disposed on a side of the accommodating cavity close to the first cavity; The heat dissipation component has a liquid inlet pipe connected to the liquid inlet so that the coolant in the liquid inlet pipe flows into the first cavity through the liquid inlet; the liquid outlet pipe of the heat dissipation component is connected to the liquid outlet so that the coolant in the first cavity flows into the liquid outlet pipe through the liquid outlet.

10. A projection system, characterized in that: The invention comprises a projection screen and the projection device according to any one of claims 1 to 9, wherein the projection device is used to project a projection picture onto the projection screen.

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