Lighting device

Abstract

Lighting device with a housing (2) defining a cooling chamber (200) and comprising a water inlet (24) and a water outlet (25) to connect the cooling chamber (200) to the outside world, a flow guidance unit (3) arranged in the cooling chamber (200), and a light emission module (4) connected to an outer surface of the housing (2), characterized in that: The flow control unit (3) comprises a flow control column (31) which is connected to the housing (2) and to the water inlet (24), and at least one flow control or guide hole (32) is provided in the flow control column (31), wherein the flow control unit (3) and the housing (2) together form a flow control or guide channel (26) between them, wherein the at least one flow control hole (32), the water inlet (24) and the water outlet (25) are connected to the flow control channel (26), wherein the water inlet (24) is configured to allow the entry of a fluid into the flow control column (31), and wherein the at least one flow control opening (32) is configured to allow the fluid to flow from the flow control column (31) into the flow control channel (26) to exit the housing. (2) to exit through the water outlet (25).

Description

[0001] The present disclosure relates to a lighting device, in particular a lighting device with light-emitting diodes.

[0002] Filming or other large-format photography requires shooting in various scenes. To perfectly depict the scene / atmosphere desired by the photographer, the "light source" plays a crucial role. However, natural ambient light often fails to meet the necessary standards due to the influence of time of day, season, or the requirements of the scene's color. Therefore, high-intensity light sources capable of simulating different color temperatures are indispensable tools for large-format photography. Hydrargyrum medium-pressure iodide lamps (HMI lamps) are frequently used in film and photography due to their high light intensity and stable light supply. However, their high light intensity comes at the cost of high energy consumption and high operating temperature. Furthermore, HMI lamps contain halogen gas, raising safety concerns when replacing them.

[0003] To solve the aforementioned problems, an LED lamp, as described in US Publication No. 20220136690 A1 (“LED Lamp with Integrated Heat Dissipation”), uses an 80-watt LED lamp matched to a lens design and incorporates a heat dissipation housing selected from an integrated cold-formed aluminum part or an integrated ceramic part. This improves the strength of the heat dissipation housing and prevents it from being easily damaged. This achieves the goal of replacing a 1000-watt halogen lamp.

[0004] Currently, the search for a lighting device that can replace HMI lamps and has good heat dissipation is a crucial development direction in the field of photographic technology.

[0005] Therefore, one objective of the present disclosure is to provide a lighting device that has low energy consumption and good heat dissipation.

[0006] According to this disclosure, the lighting device comprises a housing, a flow guidance unit, and a light-emitting module. The housing defines a cooling chamber and includes a water inlet and a water outlet to connect the cooling chamber to the outside world. The flow guidance unit is arranged within the cooling chamber and comprises a flow guidance column connected to the housing and to the water inlet, as well as at least one flow guidance orifice provided in the flow guidance column. The flow guidance unit and the housing together define an intermediate flow guidance channel. The at least one flow guidance chamber, the water inlet, and the water outlet are connected to the flow guidance channel. The water inlet is configured to allow the entry of a liquid into the flow guidance column.The at least one flow guidance chamber is configured to allow the flow of liquid from the flow guidance column into the flow guidance channel, from where it is discharged through the water outlet from the housing. The light-emitting module is connected to an outer surface of the housing.

[0007] Further features and advantages of the present disclosure will become clear in the following detailed description of the embodiments with reference to the accompanying drawings. It should be noted that various features may not be drawn to scale. Fig. Figure 1 is a perspective view of a lighting device according to the first embodiment of the present disclosure. Fig. Figure 2 is a sectional view of the first embodiment. Fig. 3 is a view similar to Fig. Figure 2, however, shows how liquid flows inside the lighting device of the first embodiment. Fig. Figure 4 is a perspective view of a lighting device according to the second embodiment of the present disclosure. Fig. Figure 5 is a sectional view of the second embodiment. Fig. Figure 6 is a schematic top view of the second embodiment. Fig. Figure 7 is an enlarged perspective view of a flow guidance column of the second embodiment. Fig. 8 is a view similar to Fig. Figure 5, however, shows how liquid flows inside the lighting device of the second embodiment. Fig. Figure 9 is a perspective view of a lighting device according to the third embodiment of the present disclosure. Fig. Figure 10 is a sectional view of the third embodiment. Fig. Figure 11 is a schematic top view of the third embodiment. Fig. Figure 12 is another sectional view of the third embodiment, showing how fluid flows within the lighting device of the third embodiment. Fig. Figure 13 is a sectional view of a lighting device according to the fourth embodiment of the present disclosure. Fig. Figure 14 is another sectional view of the fourth embodiment, illustrating how fluid flows within the lighting device of the fourth embodiment.

[0008] Before the present disclosure is described in more detail, it should be noted that, where it has been deemed appropriate, reference numerals or end parts of reference numerals have been repeated in the figures to indicate corresponding or analogous elements which may optionally have similar properties.

[0009] The relevant technical content, features, and effects of this disclosure are clearly presented in the following detailed description of the embodiments with reference to the drawings. Furthermore, it should be noted that the drawings of this disclosure serve only to show the relative relationship between the structures and / or positions of the components and do not refer to the actual dimensions of the components.

[0010] With reference to the Fig. 1, Fig. 2 to Fig. 3 comprises a lighting device according to the first embodiment of the present disclosure, a housing 2, a flow guide unit 3 and a light emission module 4.

[0011] The housing 2 comprises a copper enclosure wall 21, a base 22, and a top cover 23, each connected to two opposite ends 21 of the enclosure, a water inlet 24, and a water outlet 25. The enclosure wall 21 is a polyhedron with three to ten faces. In this embodiment, the enclosure wall 21 is hexahedral. The base 22, the top cover 23, and the enclosure wall 21 together define a cooling chamber 200.The base 22 comprises a base section 221, a circumferential section 222 extending upwards from a circumference of the base section 221, a plurality of spaced-apart receiving grooves 223 extending inwards from an outer surface of the circumferential section 222 and from an upper end of the circumferential section 222 to the lower section 221, and an engagement groove 224 extending inwards from a top surface of the circumferential section 222 to insert and secure the enclosing wall 21 therein. The water inlet 24 is located in a central section of the base 22 and extends through the base section 221. In this embodiment, the water outlet 25 is formed in the circumferential section 222 and extends through it to connect the cooling chamber 200 to the outside world.

[0012] The flow guidance unit 3 comprises a flow guidance column 31 and a flow guidance opening 32. The flow guidance unit 3 and the housing 2 together form a flow guidance channel 26 between them. The flow guidance channel opening 32, the water inlet 24, and the water outlet 25 are connected to the flow guidance channel 26. The flow guidance column 31 has a flow guidance section 311, which is connected to the bottom section 221 and extends upwards from it; a flow guide element 312, which is connected to a side of the flow guide section 311 that is opposite the lower section 221 and adjoins the upper cover 23; and a flow guide channel 313, which extends through the flow guide section 311 and the flow guide element 312.The flow guidance channel 313 has one end that is connected to the water inlet 24, and the other end that is connected to the flow guidance opening 32.

[0013] The flow guide element 312 can be cylindrical or polyhedral. In this embodiment, the flow guide element 312 is a polyhedron, and the number of faces of the flow guide element 312 corresponds to the number of faces of the surrounding wall 21. The flow guide element 312 has an inner surrounding surface 314 that surrounds an axis (X) and part of the flow guide channel 313, as well as a widening section 315 that extends from an upper circumference of the inner surrounding surface 314 to a top surface of the flow guide element 312 and adjoins the upper cover 23. The widening section 315 defines the flow guide opening 32. As shown in Fig. As shown in Figure 2, the shell length (A) of the flow guide element 312 is greater than the shell length (B) of the flow guide section 311. It should be noted that either the base seat 22 or the flow guide section 311 can have a thread, and the other part, i.e., either the base seat 22 or the flow guide section 311, can have a groove for detachable engagement with the thread, so that the flow guide section 311 can be detachably connected to the base seat 22.

[0014] The upper cover 23 has a flow guide block 231 that projects into the cooling chamber 200 and faces the flow guide opening 32, so that a gap is formed between the flow guide block 231 and an opening wall of the flow guide opening 32. Furthermore, the flow guide block 231 has a shape that tapers from an inner surface of the upper cover 23 towards the flow guide opening 32 in order to guide a fluid so that it exits the gap between the flow guide block 231 and the opening wall of the flow guide opening 32. In this embodiment, the flow guide block 231 is shown by way of example with a shape that tapers from the inner surface of the upper cover 23 towards the flow guide opening 32, but is not limited to this.

[0015] The light emission module 4 comprises at least one light emission unit 41 connected to an outer surface of the surrounding wall 21 and a light emission source electrically connected to an external power source (not shown). In particular, the light emission unit 41 can be a chip-on-board light-emitting diode (COB) or a surface-mounted light-emitting diode (SMD). Since the structure and material of the light emission unit 41 are known to those skilled in the art and do not constitute important features of this disclosure, a detailed description of the light emission unit 41 is omitted here. In this embodiment, the light emission module 4 comprises six light emission units 41, each connected to six surfaces of the surrounding wall 21, and suitable for photographic illumination, which is given here as an example but is not limited to this in actual implementation.

[0016] The lighting device of the first embodiment utilizes the configuration of the flow control unit 3 to allow a cooling fluid, entering the flow control channel 313 through the water inlet 24, to flow through the gap between the flow control block 231 and the wall of the flow control hole 32 into the flow control channel 26. This allows the heat emitted by the light emission units 41, arranged on the surrounding wall 21, during light emission to be absorbed by the fluid, whereupon the fluid exits the flow control channel 26 and the housing 2 through the water outlet 25. A flow path (F) of the fluid within the lighting device of this embodiment is defined in Fig. Figure 3 shows that the continuous flow of fluid for the continuous removal of the heat emitted by the light emission units 41 can achieve the effects of preventing heat accumulation and facilitating heat dissipation, thereby extending the lifetime of the lighting device of this disclosure.

[0017] Furthermore, the wires of each lighting unit 41 are arranged and bundled in a corresponding slot 223 and electrically connected to an adapter (not shown) which has an adapter pin set. This allows the lighting device of this disclosure to meet the lighting requirements of various operating environments. For example, if a daytime scene is to be simulated during photography and the operating environment requires the use of an HMI lamp, the adapter pin set of the adapter can, but is not limited to, conform to the specifications of the G22 lamp holder. The adapter pin set of the adapter can also conform to the specifications of various lamp holders, such as G24, E12, E14, E27, E40, etc.

[0018] With reference to the Fig. 4, Fig. 5, Fig. 6, Fig. 7 to Fig. 8 The second embodiment of the lighting device of this disclosure has a substantially identical structure to the first embodiment, but differs from the first embodiment in that the water outlet 25 of the housing 2 of the lighting device of the second embodiment is formed in and extends through the upper cover 23, and the upper cover 23 does not have a flow guide block 231 (see Fig. 2) Furthermore, the housing 2 of the second embodiment comprises two connecting elements 27, each connected to the water inlet 24 and the water outlet 25. The connecting elements 27 are configured to be attached to water pipes (not shown) to direct the flow of liquid into and out of the cooling chamber 200 of the housing 2. It should be noted that the housing 2 of the first embodiment can also have the connecting elements 27.

[0019] Furthermore, the structure of the flow guidance unit 3 of the second embodiment differs from that of the first embodiment. In this embodiment, the flow guidance column 31 of the flow guidance unit 3 comprises a solid flow guidance element 312 as well as a lower flow guidance section (311a) and an upper flow guidance section (311b), which are hollow. The lower and upper flow guidance sections (311a, 311b) each extend from two opposite ends of the flow guidance column 31 towards the base 22 and the upper cover 23, and the lower flow guidance section (311a) and the upper flow guidance section (311b) each abut the base 22 and the upper cover 23. The lower flow guidance section (311a) corresponds in position to and is connected with the water inlet 24.The upper flow guide section (311b) corresponds in position to the water outlet 25 and is connected to it. In this embodiment, the flow guide unit 3 has a plurality of flow guide holes 32, which are provided in the lower and upper flow guide sections (311a, 311b). As in the . Fig. 6 and Fig. As shown in Figure 7, each of the lower and upper flow conduit sections (311a, 311b) has four flow conduit holes 32 spaced at an angle to each other and extending axially.

[0020] In this embodiment, the fluid enters the lower flow guide section (311a) through the water inlet 24 and flows through the flow guide holes 32 in the lower flow guide section (311a) into the flow guide channel 26. From the flow guide channel 26, the fluid flows through the flow guide holes 32 in the upper flow guide section (311b) and out of the housing 2 through the water outlet 25. A flow path (F) of the fluid within the lighting device of this embodiment is defined in Fig. 8 shown.

[0021] The lighting device of the second embodiment utilizes the configuration of the flow control unit 3 to allow a cooling fluid to enter the lower flow control section (311a) of the flow control unit 3 through the water inlet 24 and then flow through the flow control holes 32 in the lower flow control section (311a) into the flow control channel 26. This allows the heat emitted by the light emission units 41 arranged on the surrounding wall 21 during light emission to be absorbed by the fluid, and the fluid flows out of the flow control channel 26 through the flow control holes 32 in the upper flow control section (311b) and out of the housing 2 through the water outlet 25.Since the fluid flows directly through the flow guidance channel 26 and carries away the heat emitted by the light emission units 41, the effects of preventing heat accumulation and facilitating heat dissipation can be achieved in a similar manner, thereby extending the lifetime of the lighting device of this disclosure.

[0022] With reference to the Fig. 9, Fig. 10, Fig. 11 to Fig. 12 The third embodiment of the lighting device of this disclosure has a substantially identical structure to the first embodiment, but differs from the first embodiment in that the water outlet 25 of the housing 2 of the lighting device of the second embodiment is formed in the bottom section 221 of the base seat 22 and extends through it and adjoins the water inlet 24. In addition, the flow guide unit 3 comprises six projecting ribs 33. Each projecting rib 33 extends outwards from a junction of two adjacent surfaces of the flow guide element 312 and abuts a junction of two corresponding adjacent surfaces of the surrounding wall 21, as shown in Fig. Figure 11 shows that the flow guidance opening 32 is axially aligned with the flow guidance channel 313.

[0023] The lighting device of the third embodiment uses the projecting ribs 33 to direct the cooling fluid exiting the flow guide opening 32 to the flow guide channel 26. This allows the heat emitted by the light emission units 41 arranged on the surrounding wall 21 during light emission to be absorbed by the fluid, and the fluid flows out of the housing 2 through the water outlet 25. A flow path (F) of the fluid within the lighting device of this embodiment is shown in Fig. Figure 12 shows that the flow guide element 312 is brought into contact with the surrounding wall 21 via the projecting ribs 33 to increase the heat conduction area, and the fluid that carries away the heat emitted by the light emission units 41 similarly achieves the effects of preventing heat accumulation and facilitating heat dissipation, thereby extending the service life of the lighting device of this disclosure.

[0024] With reference to the Fig. 13 and Fig. 14 The fourth embodiment of the lighting device of this disclosure has a similar structure to the third embodiment and comprises the housing 2, the flow guide unit 3, and the light emission module 4. The difference between the fourth embodiment and the third embodiment is that the housing 2 further comprises a partition 28 extending from the surrounding wall 21 to the flow guide openings 32 and adjoining the flow guide column 31. The partition 28 is provided with a plurality of water openings 29.

[0025] A flow path (F) of the fluid within the lighting device of this embodiment is in Fig.Figure 14 shows the following embodiment. In this embodiment, the fluid enters through the water inlet 24, flows upwards through the flow guide openings 32, and flows out of the flow guide unit 3. The fluid then flows out of the housing 2 through the water openings 29 and the water outlet 25. Therefore, the heat emitted by the light emission module 4 can be absorbed by the fluid.

[0026] In summary, the lighting device of this disclosure utilizes the structural configuration of the flow guide unit 3 in combination with the copper material of the surrounding wall 21 of the housing 2 to conduct the heat emitted by the light emission units 41 during operation to the surrounding wall 21 of the flow guide unit 3. This heat is then absorbed by the surrounding wall 21 through the fluid flowing through the cooling chamber 200, which is then discharged through the water outlet 25. This prevents heat buildup inside the housing 2 and facilitates heat dissipation, thereby extending the service life of the lighting device of this disclosure. Therefore, the objective of this disclosure can indeed be achieved.

[0027] In the description above, numerous specific details have been provided for explanatory purposes, in order to convey a thorough understanding of the embodiment(s). However, it is obvious to a person skilled in the art that one or more other embodiments can be realized without some of these specific details. It should also be noted that the reference in this description to "an embodiment," "an embodiment with an ordinal number," etc., means that a particular feature, structure, or property may be included in the implementation of the disclosure.It should also be noted that in the description, various features are sometimes combined in a single embodiment, figure, or description to streamline the disclosure and facilitate understanding of various inventive aspects; this does not mean that each of these features must be implemented in conjunction with all the other features. In other words, in any described embodiment, if the implementation of one or more features or specific details does not interfere with the implementation of one or more other features or specific details, that one or more features may be selected and implemented alone, without the other one or more features or specific details.It should also be noted that one or more features or specific details from one embodiment may be implemented together with one or more features or specific details from another embodiment in the implementation of the disclosure.

Claims

[1] Lighting device comprising a housing (2) defining a cooling chamber (200) and comprising a water inlet (24) and a water outlet (25) to connect the cooling chamber (200) to the outside world, a flow guide unit (3) arranged in the cooling chamber (200), and a light emission module (4) connected to an outer surface of the housing (2), characterized by , that: The flow control unit (3) comprises a flow control column (31) which is connected to the housing (2) and to the water inlet (24), and at least one flow control or guide hole (32) is provided in the flow control column (31), wherein the flow control unit (3) and the housing (2) together form a flow control or guide channel (26) between them, wherein the at least one flow control hole (32), the water inlet (24) and the water outlet (25) are connected to the flow control channel (26), wherein the water inlet (24) is configured to allow the entry of a fluid into the flow control column (31), and wherein the at least one flow control opening (32) is configured to allow the fluid to flow from the flow control column (31) into the flow control channel (26) to exit the housing. (2) to exit through the water outlet (25). [2] Lighting device according to claim 1, characterized by , that the housing (2) comprises an enclosure wall (21) and a base seat (22) as well as a top cover (23), each of which is connected to two opposite ends of the enclosure wall (21), and characterized by , that the bottom seat (22), the upper cover (23) and the surrounding wall (21) together form the cooling chamber (200), wherein the water inlet (24) is formed in the bottom seat (22) and the flow guide column (31) is connected to the bottom seat (22) and is in contact with the water inlet (24). [3] Lighting device according to claim 2, characterized by, that the base seat (22) has a base section (221) and a circumferential section (222) extending upwards from a circumference of the base section (221), wherein the flow guidance unit (3) has a flow guidance hole (32), wherein the water inlet (24) extends through the lower section (221), the water outlet (25) is formed in and extends through one of the parts, namely the circumferential section (222) or the lower section (221), the flow guidance column (31) is connected to the lower section (221) and extends upwards from it towards the upper cover (23), wherein the flow guidance column (31) has a flow guide or-guide channel (313) extending along its length, wherein the flow guide channel (313) has one end connected to the water inlet (24) and the other end connected to the flow guide channel opening (32), wherein the water inlet (24) is configured to allow the fluid to enter the flow guide channel (313), and the flow guide channel opening (32) is configured to direct the fluid from the flow guide channel (313) into the flow guide channel (26) to direct it out of the housing (2) through the water outlet (25). [4] Lighting device according to claim 3, characterized by, that the flow guidance column (31) has a flow guide section (311) connected to the base seat (22) and a flow guide element (312) connected to a side of the flow guide section (311) opposite the base seat (22) and adjacent to the upper cover (23), wherein the flow guide channel (313) extends through the flow guide section (311) and the flow guide element (312) to communicate with the flow guide opening (32) and the water inlet (24), wherein the flow guide element (312) has an inner circumferential surface (314) surrounding an axis (X) and a portion of the flow guide channel (313), wherein an apothem (A) of the flow guide element (312) is larger than an apothem (B) of the flow conduit section (311) [5] Lighting device according to claim 4, characterized by, that the water outlet (25) is formed in and extends through the peripheral circumferential section (222), and the flow guide element (312) further comprises a flared section (315) extending from an upper circumference of the inner surrounding surface (314) to a top surface of the flow guide element (312) adjacent to the upper cover (23), and defining the flow guide opening (32). [6] Lighting device according to claim 4, characterized by , that the water outlet (25) is formed in the bottom section (221) and extends through it, and that the flow guidance opening (32) is axially aligned with the flow guidance channel (313). [7] Lighting device according to any one of claims 4 to 6, characterized by, that both the surrounding wall (21) and the flow guide element (312) are a polyhedron and the number of surfaces of the flow guide element (312) corresponds to the number of surfaces of the surrounding wall (21). [8] Lighting device according to claim 7, characterized by , that the flow guidance unit (3) further comprises a plurality of projecting ribs (33), each of the projecting ribs (33) extending outwards from a junction of two adjacent surfaces of the flow guidance element (312) and bearing against a junction of two corresponding adjacent surfaces of the enclosure wall (21). [9] Lighting device according to claim 4, characterized by , that either the base seat (22) or the flow line section (311) has a thread and the other the base seat (22) and the flow line section (311) has a groove for releasable engagement with the thread. [10] Lighting device according to claim 2, wherein the upper cover (23) has a flow guide block (231) which projects into the cooling chamber (200) and faces the flow guide opening (32), so that a gap is formed between the flow guide block (231) and an opening wall of the flow guide opening (32), and the bottom seat (22) has an engagement groove (224) for inserting and securing the surrounding wall (21) therein. [11] Lighting device according to claim 2, characterized by, that the water outlet (25) is formed in the upper cover (23) and extends through it, wherein the flow guide column (31) has a solid flow guide element (312) and a lower flow guide section (311a) and an upper flow guide section (311b) which are hollow, wherein the lower flow guide section (311a) and the upper flow guide section (311b) each extend from two opposite ends of the flow guide column (31) towards the base (22) and the upper cover (23) and the lower flow guide section (311a) and the upper flow guide section (311b) each bear against the base (22) and the upper cover (23), wherein the lower flow guide section (311a) corresponds in its position to the water inlet (24) and is connected to the water inlet (24),wherein the upper flow guide section (311b) corresponds in its position to the water outlet (25) and is connected to the water outlet (25), wherein the flow guide unit (3) comprises a plurality of flow guide holes (32) provided in the lower flow guide section (311a) and the upper flow guide section (311b), wherein the lower flow guide section (311a) is configured to guide the fluid entering the water inlet (24) such that it flows through at least one of the flow guide holes (32) in the lower flow guide section (311a) into the flow guide channel (26), wherein the upper flow guide section (311b) is configured to direct the fluid from the flow guide channel (26) through at least one of the flow guide holes (32) in the upper flow guide section (311b) to the water outlet (25) and from the housing (2) through the water outlet (25) directs. [12] Lighting device according to claim 11, characterized by, that the flow guide element (312) is a polyhedron and a generatrix (A) of the flow guide element (312) is larger than a generatrix (B) of each of the upper flow guide sections (311b) and the lower flow guide sections (311a). [13] Lighting device according to claim 2, characterized by , that the enclosure wall (21) is a polyhedron and is made of copper, wherein the light emission module (4) comprises at least one light emission unit (41) which is arranged on an outer surface of the enclosure wall (21). [14] Lighting device according to claim 13, characterized by , that the at least one light emission unit (41) is either a chip-on-board light-emitting diode or a surface-mounted light-emitting diode.

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