Heat dissipation module and projection device

Abstract

The invention provides a heat dissipation module which is used for dissipating heat of a rotating piece. The rotating piece rotates with a first axis as a rotating shaft. The heat dissipation module comprises at least one first fan and a heat dissipation assembly. The at least one first fan is arranged on one side of the rotating part and comprises a first fan air outlet. The first fan air outlet faces the rotating part, and first airflow generated by the at least one first fan flows to the rotating part from the first fan air outlet. The heat dissipation assembly comprises an air inlet guide pipe, a plurality of inner guide pipes and at least one air outlet guide pipe. The inner guide pipes are communicated with the air inlet guide pipe and at least one air outlet guide pipe, and at least one air outlet guide pipe corresponds to at least one first fan. An air inlet guide pipe of the heat dissipation assembly is arranged corresponding to the rotating tangential direction of the rotating part, and the rotating tangential direction is perpendicular to the first axis, so that heat dissipation is conducted.

Description

Technical Field

[0001] The present invention relates to a heat dissipation module and a projection device provided with the heat dissipation module. Background Art

[0002] In current projection devices, the heat dissipation method for rotating components (such as a fluorescent color wheel, a color filter wheel, or a light diffusing wheel, etc.) located on the optical path is, for example, to provide a cooling air flow to the rotating component through a fan for temperature reduction. However, since the rotating component shares space with other components (such as an optical engine), the air flow with high thermal energy after heat exchange with the rotating component will affect other components, and the air flow with high thermal energy is not easily discharged. In addition, the rotation direction of the rotating component also affects the heat dissipation effect of the rotating component.

[0003] The "Background Art" paragraph is only used to help understand the content of the present invention. Therefore, the content disclosed in the "Background Art" paragraph may include some content that does not constitute the prior art known to those skilled in the art. The content disclosed in the "Background Art" paragraph does not represent that the problems to be solved by the content or one or more embodiments of the present invention were known or recognized by those skilled in the art before the filing of the present invention application. Summary of the Invention

[0004] The present invention provides a heat dissipation module and a projection device, which can effectively dissipate heat.

[0005] Other objects and advantages of the present invention can be further understood from the technical features disclosed in the present invention.

[0006] To achieve one or part or all of the above objects or other objects, a heat dissipation module according to an embodiment of the present invention includes at least one first fan and a heat dissipation component. The heat dissipation module is used to dissipate heat from a rotating component, and the rotating component rotates with a first axis as the rotation axis. At least one first fan is disposed on one side of the rotating component and includes a first fan air outlet. The first fan air outlet faces the rotating component, and the first air flow generated by at least one first fan flows from the first fan air outlet to the rotating component. The heat dissipation component includes an air inlet duct, a plurality of internal ducts, and at least one air outlet duct. The plurality of internal ducts are communicated with the air inlet duct and at least one air outlet duct, and at least one air outlet duct corresponds to at least one first fan. The air inlet duct of the heat dissipation component is disposed corresponding to the rotation tangent direction of the rotating component, and the rotation tangent direction is perpendicular to the first axis.

[0007] To achieve one or part or all of the above - mentioned purposes or other purposes, a projection device according to an embodiment of the present invention includes an illumination system, a light valve, and a lens module. The illumination system is used to provide an illumination beam and includes a light source module, a heat dissipation module, and a rotating member. The light source module is used to provide a light beam, and the rotating member is disposed on at least a part of the transmission path of the light beam. The rotating member rotates about a first axis, and the illumination beam includes at least a part of the light beam. The heat dissipation module is used to dissipate heat from the rotating member, and the heat dissipation module includes at least one first fan and a heat dissipation component. At least one first fan is disposed on one side of the rotating member and includes a first fan air outlet, and the first fan air outlet faces the rotating member. The first air flow generated by at least one first fan flows from the first fan air outlet to the rotating member. The heat dissipation component includes an air inlet duct, a plurality of inner ducts, and at least one air outlet duct, and the plurality of inner ducts communicate with the air inlet duct and at least one air outlet duct. At least one air outlet duct corresponds to at least one first fan. Among them, the air inlet duct of the heat dissipation component is disposed corresponding to the rotational tangent direction of the rotating member, and the rotational tangent direction is perpendicular to the first axis. The light valve is disposed on the transmission path of the illumination beam and is used to convert the illumination beam into an image beam. The lens module is disposed on the transmission path of the image beam and is used to project the image beam out.

[0008] Based on the above, the heat dissipation module of the present invention can dissipate heat from the rotating member through the heat dissipation component and the first fan. The first fan generates a first air flow to cool the rotating member. The air inlet duct of the heat dissipation component corresponds to the rotational tangent direction of the rotating member. Thus, the rotating member can guide the first air flow into the heat dissipation component to cool the first air flow, thereby improving the heat dissipation efficiency of the heat dissipation module and the projection device.

[0009] To make the above - mentioned features and advantages of the present invention more obvious and understandable, specific embodiments are hereinafter given and detailed descriptions are made in conjunction with the accompanying drawings as follows.

[0010] List of Reference Numerals

[0011] A1, A1’: First air flow

[0012] A11, A11’: First cooling air flow

[0013] A12, A12’: First hot air flow

[0014] A2: Second air flow

[0015] A3: Auxiliary air flow

[0016] D1, D2: Distance

[0017] E1, E2, E3, E4: Edge position

[0018] G, G1, G2: Gap

[0019] H1, H2, H3: Length

[0020] L1: First axis

[0021] L2: Second axis

[0022] L3: Third axis

[0023] L4: Extension axis

[0024] P1: First space

[0025] P11: First sub - space

[0026] P12: Second sub - space

[0027] P2, P2’: Second space

[0028] R1, R2: Rotational tangent direction

[0029] S1, S2: Side

[0030] S3, S4: Side

[0031] S5, S6: End

[0032] V1, V2, V3, V4: Tangent direction

[0033] X - Y - Z: Cartesian coordinates

[0034] 100: Projection device

[0035] 101: Lighting system

[0036] 110: Light source module

[0037] 120: Light valve

[0038] 130: Lens module

[0039] 140: Rotating part

[0040] 142: Center

[0041] 150: Motor

[0042] 200, 200a, 200b, 200c, 200d: Heat dissipation module

[0043] 210, 210a, 210b, 210c, 210d: Housing

[0044] 211, 211a, 211b, 211c: First housing

[0045] 212: Partition board

[0046] 213: Fan opening

[0047] 214: First opening

[0048] 215: Second opening

[0049] 216, 216a, 216d: Second housing

[0050] 217: Air guide channel

[0051] 220: Auxiliary fan

[0052] 230, 230a, 230b: First fan

[0053] 232, 232a, 232b: First fan air outlet

[0054] 234, 234a, 234b: First fan air inlet

[0055] 240, 240a, 240b, 240c, 240d: Heat dissipation component

[0056] 241, 241a, 241b, 241c, 241d: Air inlet duct 242, 242a, 242b: Inner duct

[0057] 243, 243a, 243b, 243c, 243d, 243d’: Air outlet duct

[0058] 244: Fin

[0059] 245, 245b, 245c: Body

[0060] 246: Main duct

[0061] 247: Branch duct

[0062] 250: Second fan

[0063] 252: Second fan air outlet

[0064] 254: Second fan air inlet

[0065] 300: Illumination beam

[0066] 400: Image beam. Description of the drawings

[0067] Figure 1 is a block diagram of a projection device according to an embodiment of the present invention.

[0068] Figure 2 is Figure 1 a schematic diagram of the heat dissipation module.

[0069] Figure 3 is Figure 2Schematic diagram of the heat dissipation component.

[0070] Figure 4 is Figure 2 Top view of the heat dissipation module of.

[0071] Figure 5 is Figure 2 Side view of the heat dissipation module of.

[0072] Figure 6 is Figure 1 Schematic diagram of the housing of.

[0073] Figure 7 Schematic diagram of the rotating part and the heat dissipation component according to another embodiment of the present invention.

[0074] Figure 8 Schematic diagram of the heat dissipation module according to another embodiment of the present invention.

[0075] Figure 9 is Figure 8 Schematic diagram of the heat dissipation component of.

[0076] Figure 10 is Figure 8 Top view of the heat dissipation module of.

[0077] Figure 11 is Figure 8 Side view of the heat dissipation module of.

[0078] Figure 12 is Figure 8 Schematic diagram of the housing of.

[0079] Figure 13 Schematic diagram of the heat dissipation module according to another embodiment of the present invention.

[0080] Figure 14 Schematic diagram of the heat dissipation module according to another embodiment of the present invention.

[0081] Figure 15 is Figure 14 Side view of the heat dissipation module of. Detailed implementation

[0082] Regarding the foregoing and other technical contents, features and effects of the present invention, they will be clearly presented in the following detailed description of a preferred embodiment with reference to the views. The directional terms (such as: up, down, left, right, front or back, etc.) mentioned in the following embodiments are only for reference to the directions of the attached views. Therefore, the directional terms used are for illustration and not for limiting the present invention.

[0083] Figure 1 Block diagram of a projection device according to an embodiment of the present invention. Figure 2 isFigure 1 Schematic diagram of the heat dissipation module. Figure 3 is Figure 2 Schematic diagram of the heat dissipation component. Figure 4 is Figure 2 Top view of the heat dissipation module. Figure 5 is Figure 2 Side view of the heat dissipation module. Figure 6 is Figure 1 Schematic diagram of the housing. Cartesian coordinates X - Y - Z are provided here for ease of describing components. Please also refer to Figures 1 to 6 , the projection device 100 includes an illumination system 101, a light valve 120, and a lens module 130. The illumination system 101 is used to provide an illumination beam 300 and includes a light source module 110, a rotating member 140, and a heat dissipation module 200. The light source module 110 is used to provide a light beam. The rotating member 140 is disposed on the transmission path of at least part of the light beam, wherein the illumination beam 300 includes at least part of the light beam. The light valve 120 is disposed on the transmission path of the illumination beam 300 from the illumination system 101 to convert the illumination beam 300 into an image beam 400. The lens module 130 is disposed on the transmission path of the image beam 400 to project the image beam 400 out of the projection device 100. The heat dissipation module 200 is used to dissipate heat from the rotating member 140. The rotating member 140 of this embodiment is, for example, a phosphor wheel, a filter wheel, or a diffuser wheel, but is not limited thereto. The rotating member 140 rotates about a first axis L1, and the first axis L1 is parallel to the Y - axis.

[0084] The light source module 110 may include, for example, a light-emitting diode (LED) element or a laser diode (LD) element, and may be a single light-emitting element or an array of light-emitting elements. The light valve 120 includes, for example, a liquid crystal on silicon (LCoS) panel, a digital micro-mirror device (DMD), or the like, which is one of the reflective light modulators. In some embodiments, the light valve 120 may also include a transparent liquid crystal panel, an electro-optical modulator, a magneto-optic modulator, an acousto-optic modulator (AOM), or the like, which is one of the transmissive light modulators. The present invention does not limit the type and the kind of the light valve 120. Since the illumination light beams 300 of different colors are irradiated on the light valve 120, the light valve 120 can sequentially convert the illumination light beams 300 of different colors into image light beams 400 and transmit them to the lens module 130. Therefore, the image light beams 400 converted by the light valve 120 are projected out of the projection device 100 to form an image, so as to be a color image. The detailed steps and implementation manners of the method for the light valve 120 to convert the illumination light beams 300 into image light beams 400 can be sufficiently taught, suggested, and implemented by the common general knowledge in the technical field, and thus will not be described in detail. In this embodiment, the number of the light valves 120 is one, for example, the projection device 100 using a single digital micro-mirror device, but in other embodiments, it may be multiple, and the present invention is not limited thereto.

[0085] The lens module 130 includes, for example, a combination of one or more optical lenses with refractive powers, such as various combinations of non-planar lenses, such as biconcave lenses, biconvex lenses, convex-concave lenses, concave-convex lenses, plano-convex lenses, and plano-concave lenses. In one embodiment, the lens module 130 may further include a planar, concave, or convex optical lens for projecting the image light beam 400 onto a projection target (for example, a wall or a projection screen). The present invention does not limit the type and the kind of the lens module 130.

[0086] Such as Figures 1 to 4As shown, the heat dissipation module 200 includes at least one first fan 230 and a heat dissipation component 240. In this embodiment, the number of the first fans 230 is one, but it is not limited thereto. The first fan 230 is disposed on one side S1 of the rotating member 140 and includes a first fan air outlet 232. The first fan 230 is used to generate a first air flow A1. The first air flow A1 with lower heat energy flows from the first fan air outlet 232 to the rotating member 140 to perform heat exchange with the rotating member 140. The heat dissipation component 240 receives the first air flow A1 with higher heat energy after heat exchange with the rotating member 140. The first air flow A1 performs heat exchange in and / or with the external environment of the heat dissipation component 240 to cool the first air flow A1. The cooled first air flow A1 returns to the first fan 230. The first air flow A1 completes one cooling cycle.

[0087] The heat dissipation module 200 can continuously cool the rotating member 140 through the circulation of the first air flow A1. The entire heat dissipation module 200 can dissipate heat from the rotating member 140, and the hot air flow after heat exchange with the first air flow A1 can be directly discharged from the heat dissipation module 200 and the projection device 100, so as to improve the heat dissipation efficiency of the heat dissipation module 200 and the projection device 100, and enable the heat dissipation module 200 to maintain a compact configuration, thereby reducing the volume of the heat dissipation module 200.

[0088] In one embodiment, the heat dissipation component 240 includes an air inlet duct 241, a plurality of internal ducts 242, and at least one air outlet duct 243. These internal ducts 242 communicate with the air inlet duct 241 and the at least one air outlet duct 243. The at least one air outlet duct 243 corresponds to the at least one first fan 230. In this embodiment, the number of the air outlet ducts 243 is one, but it is not limited thereto. As Figure 3 and Figure 4 shown in the embodiment, the heat dissipation component 240 further includes a body 245 and a plurality of fins 244. The internal ducts 242 extend along a second axis L2. The second axis L2 is parallel to the first axis L1 (i.e., parallel to the Y axis). The air inlet duct 241 and the air outlet duct 243 are connected to the body 245, and the internal ducts 242 and the fins 244 are disposed inside the body 245. In other embodiments, the internal ducts 242 extend along a second axis, and the second axis L2 may not be parallel to the first axis L1. For example, there is an angle greater than 0° and less than 90° between the second axis and the first axis L1. The present invention is not limited thereto.

[0089] In this embodiment, the cross-sectional shape of the internal duct 242 perpendicular to the second axis L2 is rectangular, and the internal duct 242 is specifically a flat tube, so that these internal ducts 242 can be compactly arranged to improve the space utilization rate of the heat dissipation component 240. As Figure 3As shown, these inner ducts 242 extend along the second axis L2 and are arranged along the third axis L3, and one end opening of each of these inner ducts 242 communicates with the air inlet duct 241, and the other end opening communicates with the air outlet duct 243. These fins 244 of the heat dissipation component 240 are connected between any two adjacent inner ducts among these inner ducts 242 and are located between the inner ducts 242 and the body 245. The first air flow A1 flows in the inner ducts 242, and heat exchange is performed with the external environment through the inner ducts 242 and the fins 244. The fins 244 are used to increase the heat dissipation area of the inner ducts 242 to improve the heat dissipation efficiency of the heat dissipation component 240 for the first air flow A1.

[0090] As Figure 3 and Figure 4 As shown, at least a part of the first air flow A1 is guided into the body 245 of the heat dissipation component 240 through the air inlet duct 241 by the rotating member 140, flows through the plurality of inner ducts 242, and then flows to the air outlet duct 243. The first air flow A1 leaves the heat dissipation component 240 from the corresponding air outlet duct 243. The air outlet duct 243 is arranged corresponding to the first fan air inlet 234 of the first fan 230. The first fan 230 is located between the air inlet duct 241 and the air outlet duct 243 and is configured on at least a part of the flow path of the first air flow A1 between the air inlet duct 241 and the air outlet duct 243.

[0091] Please continue to refer to Figure 3 and Figure 4 As shown, the heat dissipation module 200 further includes a housing 210. Optionally, the heat dissipation module 200 of this embodiment includes an auxiliary fan 220. The auxiliary fan 220 and the housing 210 are respectively arranged on opposite sides S3 and S4 of the heat dissipation component 240. The auxiliary fan 220 can be used to generate an auxiliary air flow A3 to dissipate heat from the inner ducts 242 and the fins 244 of the heat dissipation component 240, thereby further cooling the first air flow A1. The auxiliary air flow A3 is driven by the auxiliary fan 220 and passes through the gaps between adjacent fins among these fins 244 along the third axis L3, and heat exchange is performed with the first air flow A1 flowing in the inner ducts 242. The auxiliary air flow A3 with high heat energy after heat exchange leaves the projection device 100 (heat dissipation module 200) in a direction away from the rotating member 140. The auxiliary air flow A3 moves along the third axis L3 through the gaps between these fins 244. The third axis L3 is parallel to the X-axis, and the second axis L2 is perpendicular to the third axis L3. The auxiliary fan 220 is, for example, a heat dissipation fan with the model number 9225, but is not limited thereto.

[0092] As Figure 2 and Figure 4As shown, the housing 210 of the heat dissipation module 200 includes a first space P1 and a second space P2. The rotating member 140 can rotate about the first axis L1 and is located in the first space P1 and the second space P2 of the housing 210. The first fan 230 is disposed in the first space P1 of the housing 210, and the first fan air outlet 232 of the first fan 230 faces the rotating member 140. The heat dissipation component 240 is disposed outside the housing 210. The air inlet duct 241 and the air outlet duct 243 of the heat dissipation component 240 are connected between the body 245 of the heat dissipation component 240 and the housing 210, and communicate with the first space P1 of the housing 210 through the air inlet duct 241 and the air outlet duct 243. There is a gap G between the body 245 of the heat dissipation component 240 and the housing 210, and the side of the body 245 facing the gap G can be regarded as the air inlet of the auxiliary air flow A3. By driving of the auxiliary fan 220, the auxiliary air flow A3 flows into the gap G between the body 245 and the housing 210, and flows from the body 245 towards the auxiliary fan 220.

[0093] The housing 210 specifically includes a first housing 211 and a second housing 216. In this embodiment, the first housing 211 and the second housing 216 are arranged along the Z-axis for example, and the first housing 211 and the second housing 216 form the first space P1 and the second space P2 after being assembled. The first housing 211 defines the first space P1, and the second housing 216 defines the second space P2. The first fan 230 is disposed in the first housing 211, and the rotating member 140 is located in the first housing 211 and the second housing 216. The housing 210 and the air inlet duct 241, the inner duct 242 and the air outlet duct 243 of the heat dissipation component 240 form a sealed space to prevent the first air flow A1 from escaping to the outside and reducing the heat dissipation efficiency of the heat dissipation module 200.

[0094] As Figures 2 to 6As shown, the first housing 211 of the housing 210 includes at least one partition 212, at least one first opening 214, and a second opening 215. By means of the partition 212, at least one first sub-space P11 and a second sub-space P12 are separated from the first space P1. The number of the first openings 214 in this embodiment corresponds to the number of the air outlet ducts 243 and is one, and the number of the partitions 212 is one to separate out one first sub-space P11, but it is not limited thereto. The first opening 214 in this embodiment corresponds to the first sub-space P11, and the second opening 215 corresponds to the second sub-space P12. The partition 212 includes a fan opening 213. The first fan 230 is located in the first sub-space P11, and a part of the rotating member 140 is located in the second sub-space P12. The fan opening 213 corresponds to the first fan air outlet 232 of the first fan 230. The air outlet duct 243 of the heat dissipation assembly 240 is connected to the first opening 214 of the first housing 211, and the air inlet duct 241 of the heat dissipation assembly 240 is connected to the second opening 215 of the first housing 211. Through the above configuration, the heat dissipation assembly 240 is communicated with the first space P1 of the first housing 211.

[0095] As Figure 5 shown, the first space P1 defined by the first housing 211 of the housing 210 in this embodiment is located above the second space P2 defined by the second housing 216 in the Z-axis direction, but it is not limited thereto. The air inlet duct 241 of the heat dissipation assembly 240 corresponds to the outer peripheral edge of the rotating member 140. The relative positions of the first space P1 and the second space P2 of the housing 210 and the setting position of the air inlet duct 241 are related to the rotation tangent direction R1 of the rotating member 140, which will be further described below.

[0096] Please continue to refer to Figure 5 in combination with Figures 2 to 4 , when the rotating member 140 rotates with the first axis L1 (parallel to the Y axis) as the rotation axis, any edge position on the outer peripheral edge of the rotating member 140 ( Figure 5 illustrated by four edge positions E1, E2, E3, and E4) respectively has tangent directions V1, V2, V3, and V4 corresponding to the rotation of the rotating member 140 on the rotation tangent of the rotating member 140. In this embodiment, the air inlet duct 241 of the heat dissipation assembly 240 is arranged corresponding to the rotation tangent direction R1 of the rotating member 140, and the rotation tangent direction R1 is perpendicular to the first axis L1. The first fan air outlet 232 is configured to correspond to the edge position adjacent to the outer peripheral edge of the rotating member 140. For example, the current Figure 4 presented edge position E1, and the first air flow A1 from the first fan air outlet 232 flows towards the heat dissipation assembly 240 along the rotation tangent direction R1.

[0097] Since the rotating member 140 rotates, the four exemplary edge positions E1, E2, E3, and E4 will successively pass through the first fan air outlet 232. In this embodiment, the current Figure 5 presented edge position E1 is taken as an example, and the following will continue to describe with the Figure 5 presented drawing. Therefore, the air inlet duct 241 of the heat dissipation component 240 is arranged corresponding to the rotation tangent direction R1 to ensure that most of the first air flow A1 can be guided by the rotating member 140 along the rotation tangent direction R1 and flow into the air inlet duct 241, and then flow into the heat dissipation component 240 through the air inlet duct 241. The rotation tangent direction R1 faces the air inlet duct 241 of the heat dissipation component 240. In this embodiment, the rotation tangent direction R1 is described as being parallel to the third axis L3 (X-axis).

[0098] Please continue to refer to Figure 5 , when the rotating member 140 of this embodiment rotates clockwise with the first axis L1 (parallel to the Y-axis) as the rotation axis, for example Figure 5 the tangent direction V1 of the currently presented edge position E1 is parallel to the third axis L3 (parallel to the X-axis) and faces the heat dissipation component 240, and is the rotation tangent direction R1. Figure 5 The space where the currently presented edge position E1 is located is the first space P1 of the housing 210. The air inlet duct 241 corresponds to the position of the currently Figure 5 presented rotation tangent direction R1. Figure 5 The orthographic projection of the presented edge position E1 on the heat dissipation component 240 overlaps the air inlet duct 241. In an embodiment, the length H1 (as Figure 3 ) of the air inlet duct 241 along the extension axis L4 is designed to be equal to the radius of the rotating member 140, whereby most of the first air flow A1 can be guided by the rotating member 140 along the rotation tangent direction R1 and flow into the air inlet duct 241 to obtain a better air flow guiding effect, but it is not limited thereto. The extension axis L4 is parallel to the Z-axis and perpendicular to the first axis L1, and the extension axis L4 is perpendicular to the normal direction of the air inlet surface of the air inlet duct 241.

[0099] Figure 4 The flow direction of the first air flow A1 is schematically shown by an arrow to detail the cooling cycle process of the first air flow A1. As Figure 4 shown, since the rotating member 140 is located on at least part of the light beam transmission path (refer to Figure 1), so a large amount of thermal energy will accumulate under continuous beam irradiation and can be regarded as a heat source. The first air flow A1 with relatively small thermal energy generated from the first air outlet 232 of the first fan 230 is defined as the first cooling air flow A11. The first cooling air flow A11 (the first air flow A1 with relatively small thermal energy) can exchange heat with the rotating member 140 to cool the rotating member 140. The first air flow A1 with relatively large thermal energy after heat exchange is defined as the first hot air flow A12. The first hot air flow A12 (the first air flow A1 with relatively large thermal energy) is guided by the rotating member 140 through the air inlet duct 241 and enters the main body 245 of the heat dissipation component 240, and flows towards these internal ducts 242 (such as Figure 3 ). Figure 3 The flow of the first hot air flow A12 in the two internal ducts 242 is schematically illustrated by three arrows, but is not limited thereto. The first hot air flow A12 can flow in all the internal ducts 242.

[0100] Such as Figure 3 and Figure 4 shown, during the process of the first hot air flow A12 (the first air flow A1) flowing in the internal duct 242, when the first hot air A12 flows through the internal duct 242, heat can be dissipated by means of the fins 244, and the auxiliary air flow A3 flows through the fins 244 for heat exchange. The auxiliary air flow A3 with thermal energy after heat exchange flows in a direction away from the heat dissipation module 200. And the first air flow A1 with relatively small thermal energy after heat exchange leaves the heat dissipation component 240 from the air outlet duct 243, thus forming the first cooling air flow A11. At least part of the first cooling air flow A11 enters the first air inlet 234 of the first fan 230. Then, the first cooling air flow A11 (the first air flow A1) is blown out from the first air outlet 232 again. Thus, the heat dissipation module 200 completes a cooling cycle. The first air flow A1 can continuously dissipate heat from the rotating member 140 through this heat dissipation cycle.

[0101] Figure 7 is a schematic diagram of a rotating member and a heat dissipation component according to another embodiment of the present invention. The heat dissipation module 200a of this embodiment is similar to the previous embodiment, and the difference between the two is that the rotating member 140 of this embodiment rotates in a counterclockwise direction with the first axis L1 (parallel to the Y axis) as the rotation axis. At this time, the first air outlet (not shown) is configured to correspond to an edge position adjacent to the outer periphery of the rotating member 140, such as the current Figure 7 presented edge position E3, and the first air flow A1 from the first air outlet flows along the rotation tangent direction R2 towards the air inlet duct 241a of the heat dissipation component 240a. Taking Figure 7 the presented edge position E3 as an example, the tangent direction V3 of the edge position E3 is parallel to the X axis and faces the heat dissipation component 240a. The first space P1 defined by the first housing 211a of the housing 210a corresponds to the currentFigure 7 In the presented edge position E3, the first space P1 is located below the second space P2 defined by the second housing 216a in the Z-axis direction (i.e., parallel to the extending axis L4). The air inlet duct 241a of the heat dissipation assembly 240a corresponds to the outer peripheral edge of the rotating member 140. For example, Figure 7 the presented edge position E3.

[0102] In this embodiment, the length H2 of the air inlet duct 241a along the extending axis L4 is greater than the radius of the rotating member 140 and less than the diameter of the rotating member 140. The outer peripheral edge of the rotating member 140, for example, Figure 7 the presented edge position E3's positive projection on the heat dissipation assembly 240a along the X-axis overlaps with the air inlet duct 241a. Thus, it can be seen that the setting manner of the housing 210a and the setting manner of the air inlet duct 241a of the heat dissipation assembly 240a can change with the rotation direction of the rotating member 140. The heat dissipation module 200a of this embodiment has the same effect as the previous embodiment and will not be elaborated here.

[0103] Figure 8 is a schematic diagram of a heat dissipation module according to another embodiment of the present invention. Figure 9 is Figure 8 a schematic diagram of the heat dissipation assembly. Figure 10 is Figure 8 a top view of the heat dissipation module. Figure 11 is Figure 8 a side view of the heat dissipation module. Figure 12 is Figure 8 a schematic diagram of the housing. Please also refer to Figures 8 to 12 , in this embodiment, the number of the first fans 230a and 230b of the heat dissipation module 200b is two. The two first fans 230a and 230b are arranged on the opposite sides S1 and S2 of the rotating member 140. The number of the air outlet ducts 243a and 243b of the heat dissipation assembly 240b is two, and the air inlet duct 241b is located between the two air outlet ducts 243a and 243b. A part of the inner duct 242a is communicated with the air outlet duct 243a and the air inlet duct 241b, and another part of the inner duct 242a is communicated with the air outlet duct 243b and the air inlet duct 241b.

[0104] As Figures 10 to 12As shown, the number of first openings 214 of the first housing 211b of the housing 210b is two, and the number of partition plates 212 is two. The two partition plates 212 partition two first sub-spaces P11 and a second sub-space P12. The second sub-space P12 is located between the two first sub-spaces P11, and the second opening 215 is located between the two first openings 214. There is a distance D1 between the body 245b of the heat dissipation component 240b and the housing 210b, and the size of the gap G1 between the body 245b and the housing 210b depends on the distance D1. The length H3 of the air inlet duct 241b of the heat dissipation component 240b on the Z axis is greater than the diameter of the rotating member 140, and the positive projection of the center 142 of the rotating member 140 on the heat dissipation component 240b along the X axis overlaps with the air inlet duct 241b. In an embodiment not shown, the length of the air inlet duct 241b on the Z axis may be equal to the diameter of the rotating member 140.

[0105] As Figure 9 and Figure 10 shown, the two first fan air inlets 234a, 234b of the two first fans 230a, 230b are respectively arranged corresponding to the two air outlet ducts 243a, 243b. The position of the first fan air outlet 232a of the first fan 230a is opposite to the position of the first fan air outlet 232b of the first fan 230b. The two first fans 230a, 230b respectively generate two first airflows A1, A1' (first cooling airflows A11, A11') to dissipate heat from the rotating member 140.

[0106] Figure 9 and Figure 10 The flow directions of the two first airflows A1, A1' are schematically shown by arrows. After the two first cooling airflows A11, A11' respectively exchange heat with the rotating member 140, corresponding two first hot airflows A12, A12' are formed. The two first hot airflows A12, A12' are guided by the rotating member 140 and enter the heat dissipation component 240b from the air inlet channel 241b. The first hot airflow A12 is dissipated heat through the heat dissipation component 240b to form the first cooling airflow A11. The first cooling airflow A11 leaves the heat dissipation component 240b from the air outlet duct 243a and enters the first fan air inlet 234a of the first fan 230a. The first hot airflow A12' is dissipated heat through the heat dissipation component 240b to form the first cooling airflow A11'. The first cooling airflow A11' leaves the heat dissipation component 240b from the air outlet duct 243b and enters the first fan air inlet 234b of the first fan 230b. The heat dissipation module 200b of this embodiment has similar effects to the foregoing embodiment and will not be elaborated here.

[0107] In the existing heat dissipation module, two fans are arranged on both sides of the rotating member to cool the rotating member. When the rotating member rotates at 7200 rpm, when the rotating member rotates clockwise, the temperatures of the two airflows generated by the two fans can be between 45 °C and 50 °C. The rotating member can be cooled to about 302 °C. When the rotating member rotates counterclockwise, the temperatures of the two airflows generated by the two fans can be between 45 °C and 55 °C. The rotating member can be cooled to about 268 °C.

[0108] When using the heat dissipation module 200b of the present embodiment to dissipate heat from the rotating member 140 rotating at 7200 rpm, the temperatures of the two first cooling airflows A11, A11' generated by the two first fans 230a, 230b can be between 35 °C and 42 °C, and the rotating member 140 can be cooled to 248 °C through the heat dissipation module 200b. The orthographic projections of the edge positions E1, E3 of the rotating member 140 presented in this embodiment on the heat dissipation component 240b are located on the air inlet duct 241b, that is, when the rotating member 140 rotates counterclockwise (currently Figure 11 presented as rotating clockwise), the rotating member 140 can still be cooled to 249 °C through the heat dissipation module 200b. The temperatures of the two first cooling airflows A11, A11' generated by the two first fans 230a, 230b can be between 34 °C and 40 °C.

[0109] It can be seen from this that compared with the existing heat dissipation module, the heat dissipation module 200b of the present embodiment can more effectively reduce the temperatures of the first cooling airflows A11, A11' generated by the first fans 230a, 230b, and can more effectively cool the rotating member 140.

[0110] In addition, the heat dissipation module 200b of the present embodiment may further include the auxiliary fan 220 of the foregoing Figure 4 embodiment (not shown in Figures 8 to 12 ). Figure 4The auxiliary fan 220 and the housing 210b of this embodiment are located on the opposite sides S3 and S4 of the heat dissipation component 240b. When the auxiliary fan 220 is provided and the rotational speed of the rotating member 140 is 14,400 rpm, when the rotating member 140 rotates clockwise, the temperatures of the two first cooling airflows A11 and A11' generated by the two first fans 230a and 230b of the heat dissipation module 200b can be between 35 degrees Celsius and 42 degrees Celsius, and the rotating member 140 can be cooled to approximately 208 degrees Celsius through the heat dissipation module 200b. When the rotating member 140 rotates counterclockwise, the temperatures of the two first cooling airflows A11 and A11' generated by the two first fans 230a and 230b can be between 35 degrees Celsius and 42 degrees Celsius, and the rotating member 140 can be cooled to approximately 218 degrees Celsius through the heat dissipation module 200b. Thus, it can be seen that the temperature of the first airflows A1 and A1' and the rotating member 140 can be more effectively reduced by the auxiliary fan 220.

[0111] Figure 13 is a schematic diagram of a heat dissipation module according to another embodiment of the present invention. Please also refer to Figure 10 and Figure 13 , the heat dissipation module 200c of this embodiment is similar to the previous embodiment. The difference between the two is that the number of air outlet ducts 243c of the heat dissipation component 240c of this embodiment is one, and the number of first openings 214 of the housing 210c (the first housing 211c) is two. The air outlet duct 243c and the air inlet duct 241c are located at the opposite ends S5 and S6 of the heat dissipation component 240c. The air inlet duct 241c communicates with the second opening 215, and the air outlet duct 243c communicates with the two first openings 214.

[0112] Specifically, the air outlet duct 243c of this embodiment includes a main duct 246 and two branch ducts 247. One end of the main duct 246 is connected to the two branch ducts 247, and the other end of the main duct 246 is connected to the main body 245c of the heat dissipation component 240c. The air outlet duct 243c is, for example, in a Y shape. The two branch ducts 247 are respectively connected to the two first openings 214. The distance D2 between the main body 245c of the heat dissipation component 240c and the housing 210c is greater than the distance D1 between the heat dissipation component 240b and the housing 210b of the previous embodiment. By this means, the size of the air inlet (gap G2) of the auxiliary airflow A3 can be increased to improve the flow rate of the auxiliary airflow A3, and thus improve the heat dissipation efficiency of the heat dissipation module 200c. The heat dissipation module 200c of this embodiment has a similar effect to the previous embodiment and will not be elaborated here.

[0113] Figure 14 is a schematic diagram of a heat dissipation module according to another embodiment of the present invention. Figure 15 is Figure 14 a side view of the heat dissipation module. Please also refer to Figure 10 andFigure 14 , the heat dissipation module 200d of this embodiment is similar to the foregoing embodiment. The difference between the two is that the heat dissipation module 240d of this embodiment further includes a second fan 250, and the second fan 250 is disposed in the second space P2' (the second housing 216d) of the housing 210d. The two first fan air outlets 232a and 232b of the two first fans 230a and 230b are at least partially misaligned along the Y-axis.

[0114] As Figure 14 and Figure 15 shown, the first fan air outlet 232a of the first fan 230a corresponds to the edge position of the rotating member 140, for example Figure 15 the edge position E1 presented, and the first fan air outlet 232b of the first fan 230b corresponds to the center 142 of the rotating member 140. Specifically, the first fan air outlet 232b corresponds to the motor 150 of the projection device 100. The motor 150 is disposed in the housing 210d and connected to the center 142 of the rotating member 140. The motor 150 is used to drive the rotating member 140 to rotate. The first fan 230b can be used to dissipate heat from the motor 150.

[0115] The second fan 250 includes a second fan air inlet 254 and a second fan air outlet 252. The second fan 250 is used to generate a second air flow A2. The housing 210d includes a wind guiding channel 217. The wind guiding channel 217 is used to guide the second air flow A2 flowing out from the second fan air outlet 252. The wind guiding channel 217 corresponds to the second fan 250 and is disposed in the second housing 216d (the second space P2'). The second fan air outlet 252 is connected to the wind guiding channel 217. The second air flow A2 generated by the second fan 250 flows out from the second fan air outlet 252 and is guided by the wind guiding channel 217 to the edge position of the rotating member 140, for example Figure 15 the edge position E4 presented, to perform heat exchange with the rotating member 140.

[0116] As Figure 14 and Figure 15 shown, the second air flow A2 with less heat energy performs heat exchange with the rotating member 140. Due to the configuration of the housing 210d and the rotation of the rotating member 140, part of the second air flow A2 is guided to the air inlet duct 241d of the heat dissipation component 240d and flows into the heat dissipation component 240d for heat dissipation. The second air flow A2 flowing into the heat dissipation component 240d can be regarded as part of the first hot air flows A12 and A12'. After the first hot air flows A12 and A12' perform heat exchange with the heat dissipation component 240d to form the first cooling air flows A11 and A11', the first cooling air flows A11 and A11' leave the heat dissipation component 240d from the air outlet ducts 243d and 243d'.

[0117] Please continue to refer toFigure 14 and Figure 15 In this embodiment, the first subspace P11 is in communication with the second space P2'. Therefore, when the first cooling air flow A11' flows into the first space P1 (the first subspace P11) from the air outlet duct 243d', a part of the first cooling air flow A11' enters the first fan 230b, and a part of the first cooling air flow A11' flows into the second space P2' and enters the second fan 250 from the second fan air inlet 254. Thus, the second air flow A2 completes a cooling cycle. The heat dissipation module 200d of this embodiment has similar effects to the foregoing embodiments and will not be elaborated herein.

[0118] In summary, the heat dissipation module and the projection device of the embodiments of the present invention have at least one of the following advantages: The heat dissipation module can dissipate heat from the rotating member through the heat dissipation component and the first fan. The first fan generates a first air flow to cool the rotating member. The air inlet duct of the heat dissipation component corresponds to the tangential direction of the rotation of the rotating member. Thereby, the rotating member can guide the first air flow into the heat dissipation component to cool the first air flow, thereby improving the heat dissipation efficiency of the heat dissipation module and the projection device.

[0119] The above are only the preferred embodiments of the present invention, and the scope of implementation of the present invention cannot be limited thereby. That is, all simple equivalent changes and modifications made in accordance with the claims of the present invention and the specification of the present invention are still within the scope covered by the patent of the present invention. In addition, any embodiment or claim of the present invention does not have to achieve all the purposes, advantages or features disclosed in the present invention. In addition, the abstract of the specification and the title of the invention are only used to assist in the retrieval of patent documents and do not limit the scope of rights of the present invention. In addition, the terms "first", "second", etc. mentioned in this specification or claims are only used to name elements or distinguish different embodiments or scopes, and do not limit the upper or lower limits of the number of elements.

Claims

1. A heat dissipation module for dissipating heat from a rotating member, the rotating member rotating about a first axis. Characterized in that: The heat dissipation module includes at least one first fan and a heat dissipation component, wherein: The at least one first fan is disposed on one side of the rotating member and includes a first fan air outlet facing the rotating member, and a first air flow generated by the at least one first fan flows from the first fan air outlet to the rotating member; and The heat dissipation component includes an air inlet duct, a plurality of inner ducts and at least one air outlet duct, the plurality of inner ducts communicate with the air inlet duct and the at least one air outlet duct, and the at least one air outlet duct corresponds to the at least one first fan. Wherein, the air inlet duct of the heat dissipation component is disposed corresponding to the tangential direction of rotation of the rotating member, and the tangential direction of rotation is perpendicular to the first axis.

2. The heat dissipation module according to claim 1, Characterized in that: Each of the at least one first fan includes a first fan air inlet, at least a part of the first air flow is guided by the rotating member into the heat dissipation component through the air inlet duct, leaves the heat dissipation component from the corresponding at least one air outlet duct, so as to form a first cooling air flow, and at least a part of the first cooling air flow enters the first fan air inlet.

3. The heat dissipation module according to claim 1, Characterized in that: The length of the air inlet duct along the extension axis is greater than or equal to the radius of the rotating member, and the extension axis is perpendicular to the first axis and the normal direction of the air inlet surface of the air inlet duct.

4. The heat dissipation module according to claim 1, Characterized in that: The orthographic projection of the center of the rotating member on the heat dissipation component is located in the air inlet duct.

5. The heat dissipation module according to claim 1, Characterized in that: The number of the at least one first fan is two, the number of the at least one air outlet duct is two, the two first fans are disposed on opposite sides of the rotating member, the air inlet duct is located between the two air outlet ducts, and the two first fans respectively correspond to the two air outlet ducts.

6. The heat dissipation module according to claim 1, Characterized in that: The heat dissipation module further includes a housing, the housing includes a first space, the rotating member is located in the housing, the at least one first fan is disposed in the first space of the housing, and the heat dissipation component is disposed outside the housing and communicates with the housing.

7. The heat dissipation module according to claim 6, Characterized in that: The heat dissipation module further includes a second fan, the housing further includes a second space, the second fan is disposed in the second space of the housing, the second fan includes a second fan air outlet, and a second air flow generated by the second fan flows from the second fan air outlet to the rotating member.

8. The heat dissipation module according to claim 6, Characterized in that: The heat dissipation component further includes a plurality of fins, the plurality of fins being connected between adjacent ones of the plurality of inner ducts to assist air flow through the gaps between the adjacent ones of the plurality of fins, and the heat dissipation module further includes an auxiliary fan, the auxiliary fan and the housing being respectively disposed on opposite sides of the heat dissipation component, and the auxiliary fan being located on the moving path of the auxiliary air flow.

9. The heat dissipation module according to claim 1, wherein, the heat dissipation module further includes a housing, the housing including a first housing and a second housing, the first housing including a first space, the second housing including a second space, the first space including at least one first sub-space and a second sub-space, the first housing including at least one partition, the at least one partition including a fan opening and being located at the boundary between the at least one first sub-space and the second sub-space, the at least one first fan being located in the at least one first sub-space, and a part of the rotating member being located in the second sub-space, the fan opening corresponding to the air outlet of the first fan.

10. The heat dissipation module according to claim 9, wherein, the first housing includes at least one first opening and a second opening, the at least one first opening corresponding to the at least one first sub-space, the second opening corresponding to the second sub-space, the at least one first opening being connected to the at least one air outlet duct, and the second opening being connected to the air inlet duct.

11. The heat dissipation module according to claim 9, wherein, the first housing includes two first openings and a second opening, the number of the at least one air outlet duct being one, the second opening being located between the two first openings, the air outlet duct and the air inlet duct being located at opposite ends of the heat dissipation component, the air inlet duct being in communication with the second opening, and the air outlet duct being in communication with the two first openings.

12. A projection device, wherein, the projection device includes an illumination system, a light valve, and a lens module, wherein: the illumination system is configured to provide an illumination beam, the illumination system including a light source module, a heat dissipation module, and a rotating member, the light source module being configured to provide a beam, the rotating member being disposed on at least part of the transmission path of the beam, the rotating member rotating about a first axis, the illumination beam including at least part of the beam, the heat dissipation module being configured to dissipate heat from the rotating member, the heat dissipation module including at least one first fan and a heat dissipation component, wherein: the at least one first fan is disposed on one side of the rotating member and includes a first fan air outlet, the first fan air outlet facing the rotating member, and the first air flow generated by the at least one first fan flows from the first fan air outlet to the rotating member; and The heat dissipation component includes an air inlet duct, a plurality of internal ducts, and at least one air outlet duct. The plurality of internal ducts communicate with the air inlet duct and the at least one air outlet duct. The at least one air outlet duct corresponds to the at least one first fan. Wherein, the air inlet duct of the heat dissipation component is arranged corresponding to the rotational tangent direction of the rotating member, and the rotational tangent direction is perpendicular to the first axis; The light valve is disposed on the transmission path of the illumination beam to convert the illumination beam into an image beam; The lens module is disposed on the transmission path of the image beam to project the image beam.

13. The projection device according to claim 12, wherein, Each of the at least one first fan includes a first fan air inlet. At least part of the first air flow is guided into the heat dissipation component through the rotating member by the air inlet duct, leaves the heat dissipation component from the corresponding at least one air outlet duct, so as to form a first cooling air flow, and at least part of the first cooling air flow enters the first fan air inlet.

14. The projection device according to claim 12, wherein, The length of the air inlet duct along the extension axis is greater than or equal to the radius of the rotating member, and the extension axis is perpendicular to the first axis and the normal direction of the air inlet surface of the air inlet duct.

15. The projection device according to claim 12, wherein, The projection of the center of the rotating member on the heat dissipation component is located in the air inlet duct.

16. The projection device according to claim 12, wherein, The number of the at least one first fan is two, the number of the at least one air outlet duct is two, the two first fans are arranged on opposite sides of the rotating member, the air inlet duct is located between the two air outlet ducts, and the two first fans respectively correspond to the two air outlet ducts.

17. The projection device according to claim 12, wherein, The heat dissipation module further includes a housing. The housing includes a first space. The rotating member is located inside the housing. The at least one first fan is arranged in the first space of the housing, and the heat dissipation component is arranged outside the housing and communicates with the housing.

18. The projection device according to claim 17, wherein, The heat dissipation module further includes a second fan. The housing further includes a second space. The second fan is arranged in the second space of the housing. The second fan includes a second fan air outlet, and the second air flow generated by the second fan flows from the second fan air outlet to the rotating member.

19. The projection device according to claim 17, wherein, The heat dissipation component further includes a plurality of fins. The plurality of fins are connected between adjacent ones of the plurality of internal ducts to assist the air flow through the gaps between the adjacent plurality of fins. And the heat dissipation module further includes an auxiliary fan. The auxiliary fan and the housing are respectively arranged on opposite sides of the heat dissipation component, and the auxiliary fan is located on the moving path of the auxiliary air flow.

20. The projection device according to claim 12, wherein, the heat dissipation module further includes a housing, the housing includes a first housing and a second housing, the first housing includes a first space, the second housing includes a second space, the first space includes at least one first sub-space and a second sub-space, the first housing includes at least one partition, the at least one partition includes a fan opening and is located at the boundary between the at least one first sub-space and the second sub-space, the at least one first fan is located in the at least one first sub-space, a part of the rotating member is located in the second sub-space, and the fan opening corresponds to the air outlet of the first fan.

21. The projection device according to claim 20, wherein, the first housing includes at least one first opening and a second opening, the at least one first opening corresponds to the at least one first sub-space, the second opening corresponds to the second sub-space, the at least one first opening is connected to the at least one air outlet duct, and the second opening is connected to the air inlet duct.

22. The projection device according to claim 20, wherein, the first housing includes two first openings and a second opening, the number of the at least one air outlet duct is one, the second opening is located between the two first openings, the air outlet duct and the air inlet duct are located at opposite ends of the heat dissipation component, the air inlet duct communicates with the second opening, and the air outlet duct communicates with the two first openings.

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