Light mixer and lighting equipment thereof

Abstract

The utility model discloses a light mixer and lighting equipment thereof, which comprises a light mixer body, and a light mixing cavity is arranged in the light mixer body; the light mixer body is sleeved with the support, and the inner wall of the support is connected with the outer wall of the light mixer body; the fairing is arranged outside the support in a sleeving mode, a gap is formed between the inner wall of the fairing and the outer wall of the light mixer body and comprises a fairing channel distributed in the height direction of the fairing, and the two ends of the gap communicate with the outside; a plurality of heat dissipation fins are arranged on the outer wall of the support and located in the flow guide channel. The lighting equipment comprises a light source assembly and the light mixer, the light source assembly is connected with the support. According to the utility model, the plurality of radiating fins are arranged in the flow guide channel formed between the bracket and the flow guide cover, and the plurality of radiating fins are matched with fluid convection to realize heat dissipation, so that the heat dissipation performance is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lighting heat exchange, in particular to a light mixer and lighting equipment thereof. Background Art

[0002] Nowadays, with the continuous development of the photography lighting industry, the performance of products is also constantly improving. However, as the performance improves, the total power is also increasing accordingly, which will inevitably cause the operating temperature of the LED chip to rise. The performance of LED chips is greatly affected by temperature, and its performance will decrease as the temperature rises. Therefore, in the face of increasing power density, in order to ensure the stability of its light effect, the heat dissipation path performance of the light source chip must also be improved simultaneously.

[0003] At present, most photography lamps use light mixers to improve the performance of the light source. While improving the light parameters, the light mixer also causes it to be directly irradiated by light, and the light energy is converted into heat energy, causing its temperature to rise sharply. When the total power is low, this situation is not obvious, but now the continuous increase in total power causes its temperature to even exceed the limit temperature of related materials nearby, and in turn heats the light source chip, causing its temperature to continue to rise.

[0004] Therefore, how to improve heat transfer and dissipate heat is a problem that needs to be solved at present. Utility Model Content

[0005] In order to overcome at least one defect of the above-mentioned prior art, the utility model provides a light mixer and a lighting device thereof, which can form a guide channel between a bracket outside the light mixer body and a guide cover, and set a plurality of heat dissipation fins in the guide channel, so as to achieve heat dissipation by combining the plurality of heat dissipation fins with fluid convection, thereby improving the heat dissipation performance.

[0006] The technical solution adopted by the utility model to solve the problem is: a light mixer, comprising:

[0007] A light mixer body, wherein a light mixing cavity is provided in the light mixer body, and the light mixing cavity is used to reflect the light emitted by the light source to mix the light;

[0008] A bracket, wherein the bracket is sleeved outside the light mixer body, and the inner wall of the bracket is connected to the outer wall of the light mixer body;

[0009] A guide cover is sleeved outside the bracket, a gap is formed between the inner wall of the guide cover and the outer wall of the mixer body, the gap includes a guide channel distributed along the height direction of the guide cover, and both ends of the gap are connected to the outside; a plurality of heat dissipation fins are provided on the outer wall of the bracket, and the heat dissipation fins are located in the guide channel.

[0010] Furthermore, the bracket comprises a bracket base and a bracket tube which are connected to each other, and the bracket base is arranged around the outer circumference of the bottom end of the bracket tube;

[0011] The deflector cover comprises a deflector sleeve and a deflector chassis which are connected to each other, and the deflector chassis is arranged around the outer peripheral edge of the bottom end of the deflector sleeve;

[0012] The gap also includes a convection gap distributed along the width direction of the guide chassis, the convection gap is formed between the inner wall of the guide chassis and the outer wall of the bracket base, the guide channel is formed between the inner wall of the guide sleeve and the outer wall of the bracket tube, and the convection gap and the guide channel are interconnected.

[0013] Furthermore, a heat sink is provided in the convection interval, and the heat sink is in contact with the bracket base.

[0014] Furthermore, the heat sink comprises a heat sink chassis and a plurality of heat sink pins, the heat sink chassis is mounted on the bracket base, and the plurality of heat sink pins are arranged on a side of the heat sink chassis away from the bracket base.

[0015] Furthermore, the guide chassis is provided with a positioning column, the bracket base is provided with a positioning hole, and the positioning column is correspondingly inserted into the positioning hole.

[0016] Furthermore, the distance from the inner wall of the guide sleeve to the outer wall of the bracket tube along the width direction of the guide chassis gradually decreases from an end close to the guide chassis to an end far away from the guide chassis.

[0017] Furthermore, a plurality of the heat dissipation fins are distributed in an array on the outer wall of the bracket tube along the circumferential direction of the bracket tube.

[0018] Furthermore, the inner wall of the bracket is connected to the outer wall of the light mixer body via a heat conducting layer.

[0019] Furthermore, the cross-sectional shape of the light mixer body is a polygon.

[0020] A lighting device comprises a light source substrate and the light mixer; a light source is arranged on the light source substrate, and the light mixer is installed on the light source substrate, and the light source is located in the light mixer.

[0021] In summary, the utility model has the following technical effects:

[0022] When the light mixer body generates heat due to light mixing, since the light mixer body and the bracket are connected to each other, the heat in the light mixer body can be transferred to the inner wall of the bracket, and then transferred to the multiple heat dissipation fins on the outer wall of the bracket. A guide cover is also provided outside the bracket. Since a gap is formed between the inner wall of the guide cover and the outer wall of the light mixer body, both ends of the gap are connected to the outside, and the gap includes a guide channel distributed along the height direction of the guide cover, a chimney effect can be formed between the gaps to enhance the convection phenomenon between the gaps, and since the heat dissipation fins are arranged between the guide channels, the heat conduction and heat dissipation effect of the heat can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the heat exchanger of the utility model;

[0024] Figure 2 It is a cross-sectional view of the heat exchanger of the utility model;

[0025] Figure 3 This is a schematic diagram of the exploded structure of the heat exchanger of the utility model;

[0026] Figure 4 It is a structural schematic diagram of a support of a heat exchanger of the utility model;

[0027] Figure 5 It is a schematic structural diagram of the heat dissipation element of the heat exchanger of the utility model.

[0028] Among them, the meanings of the figure numbers are as follows: 10, bracket; 11, bracket tube; 12, bracket base; 13, light mixer body; 131, light mixing cavity; 20, guide cover; 21, guide sleeve; 22, guide chassis; 30, heat dissipation fins; 40, heat dissipation element; 41, heat dissipation chassis; 42, heat dissipation needle; 50, guide channel; 60, convection spacer; 70, light source substrate. DETAILED DESCRIPTION

[0029] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0030] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0032] See also Figure 1-Figure 5 The utility model discloses a light mixer, including a light mixer body 13, a bracket 10 and a flow guide cover 20. The light mixer body 13 is provided with a light mixing cavity 131. The bracket 10 is mounted on the light mixer body, and the inner wall of the bracket 10 is connected to the outer wall of the light mixer body. The flow guide cover 20 can be mounted outside the bracket 10, and a gap is formed between the inner wall of the flow guide cover 20 and the outer wall of the bracket 10, and the gap includes a gap along the height direction of the flow guide cover 20 (such as Figure 2 The guide channel 50 is distributed in the Z direction as shown, and both ends of the gap are connected to the outside.

[0033] Specifically, heat dissipation fins 30 are provided in the guide channel 50 , and the heat dissipation fins 30 are located in the guide channel 50 , so that the heat dissipation fins can absorb the heat in the light mixing cavity 131 of the light mixer body 13 and guide it out through the guide channel 50 .

[0034] On the basis of the above structure, when using the light mixer of the utility model, the light mixer can be used for lighting equipment such as lighting lamps and photographic lights. When in use, the light source of the lighting equipment can be connected to the bracket 10, and the light source can correspond to the mixing cavity 131 of the bracket 10. The mixing cavity 131 guides the light out, so that the heat generated by the light source module can be concentrated in the mixing cavity 131.

[0035] When the light source module of the lighting device is working, since the light source module corresponds to the light mixing cavity 131, the light generated by the light source module can be mixed under the action of the light mixing cavity 131 of the light mixer body 13, and the generated heat can be concentrated in the light mixing cavity 131. Since there is a gap between the bracket connected to the light mixer body and the air guide cover, the multiple heat dissipation fins 30 in the gap can absorb the heat in the light mixing cavity 131, and the heat absorbed by the heat dissipation fins 30 can be concentrated in the air guide channel 50. Both ends of the air guide channel 50 are directly connected to the outside, so a chimney effect can be formed, and natural air convection is used to achieve heat exchange, which can effectively improve the air convection heat exchange rate on the heat transfer path, thereby minimizing the heat of the light mixing cavity 131, and then the heat generated by the light source module can be quickly taken away.

[0036] Compared with directly setting a heat sink structure on the bracket 10, the heat absorbed by the heat sink cannot be taken away in time. In this embodiment, one end of the guide channel 50 is used to introduce external airflow, and the other end is used to guide the internal airflow out, so as to achieve convection heat dissipation and improve the heat dissipation speed. In addition, compared with the prior art of achieving heat convection heat dissipation through a heat dissipation fan, the cost of the heat exchanger can be reduced, and the number of heat dissipation fans can be reduced, which will also reduce the volume of the heat exchanger.

[0037] Furthermore, the above-mentioned bracket 10 includes a bracket base 12 and a bracket tube 11. The bracket base 12 and the bracket tube 11 are connected to each other, and the bracket base 12 is arranged around the outer peripheral edge of the bottom end of the bracket tube 11, so that the bracket base 12 can be used as an assembly base for external equipment. For example, when the lighting equipment is dissipated, the light source module of the lighting equipment can be based on the bracket base 12 as the assembly base, with a larger assembly surface and a stable installation structure.

[0038] In addition, the above-mentioned light mixer body 13 is arranged in the support tube 11, and the guide cover 20 is arranged outside the support tube 11; the guide channel 50 is formed between the guide cover 20 and the support tube 11. In this way, the support tube 11 can gather heat, reduce the heat flow from straight up and down, and the side heat can enter the guide channel 50 formed by the guide cover 20 and the support tube 11, and the heat can be dissipated to the greatest extent. The heat of the concentrated guide channel 50 can be convectively discharged through the two ends of the guide channel 50, realizing natural heat dissipation and high heat dissipation speed.

[0039] More specifically, in order to better achieve gas convection in the guide channel 50 , the guide cover 20 includes a guide sleeve 21 and a guide chassis 22 . When the guide cover 20 is assembled with the bracket 10 , the guide chassis can be arranged around the outer periphery of the bottom end of the guide sleeve 21 .

[0040] Based on this structure, the above gap also includes the gap along the width direction of the guide chassis (such as Figure 2 That is, after the guide sleeve 21 is arranged outside the bracket tube 11, the inner wall of the guide chassis 22 can be spaced apart from the outer wall of the bracket base 12 to form the above-mentioned convection spacer 60, and the guide channel 50 is formed between the guide sleeve 21 and the bracket tube 11; the convection spacer 60 is connected with the end of the guide channel 50.

[0041] Based on this structure, when the heat of the guide channel 50 is dissipated, the convection interval 60 can also introduce external airflow, and the airflow enters through the convection interval 60 and is introduced into the guide channel 50, and then the heat in the guide channel 50 is dissipated through the other end of the guide channel 50. Since the guide cover 20 is formed by the guide sleeve 21 and the guide chassis 22, and the outer diameter of the guide chassis 22 is larger than the outer diameter of the guide sleeve 21, and then the guide chassis 22 is spaced from the bracket base 12 with a larger outer diameter, the convection interval 60 formed has a large introduction area, so that a larger amount of external air can be brought in to form convection, and the heat dissipation speed is faster.

[0042] Of course, on the basis of the structure without setting the guide chassis 22, the guide cover 20 can also be directly set outside the bracket tube 11. At this time, the guide channel 50 formed to introduce fluid is directly determined by the inner diameter of the interval between the guide cover 20 and the bracket tube 11. In order to achieve a large convection volume, the outer diameter of the guide cover 20 must be made larger, so that the overall volume of the heat exchanger is larger.

[0043] In addition, flow guide ports may be directly provided at the top and bottom of the bracket 10 or at the top and bottom of the flow guide cover 20 to achieve gas convection in the flow guide channel 50 to dissipate heat.

[0044] In order to further improve the heat exchange speed, a heat sink 40 can be arranged in the convection interval 60, and the heat sink 40 can be in contact with the bracket base 12, so that after the heat inside the light mixing cavity 131 is transferred to the guide channel 50, part of the heat will reach the convection interval 60, and the heat sink 40 in the convection interval 60 can transfer part of the heat to the air and dissipate part of the heat. At the same time, the convection interval 60 can also bring in external airflow to the bottom end of the guide channel 50, so that the heat inside the guide channel is dissipated through the top end of the guide channel 50, realizing heat convection, thereby improving the efficiency of natural convection heat exchange.

[0045] Furthermore, in this embodiment, the heat sink 40 includes a heat sink chassis 41 and a plurality of heat sink pins 42. The heat sink chassis 41 is mounted on the bracket base 12, and the plurality of heat sink pins 42 are disposed on the heat sink chassis 41. The heat sink chassis 41 and the heat sink pins 42 can both be made of aluminum material, and the heat sink 40 can be selected as a needle-type cold forged heat sink in the prior art. The heat sink chassis 41 can be attached to the bracket base 12. Since the bracket base 12 is the assembly base of the light source module of the lighting equipment, the heat sink chassis 41 can directly absorb the heat of the heat sink bracket base 12, and realize the thermal convection of heat and air with the plurality of heat sink pins 42, so that the heat exchange efficiency is high.

[0046] In addition, the heat dissipation pins 42 distributed at multiple intervals realize heat convection between heat and air, which can reduce the resistance of air flow compared to the heat sink, and more heat dissipation pins 42 structures can be distributed in the limited convection interval 60 space, so the heat exchange efficiency is better. In addition, the heat dissipation pins 42 with needle-shaped structures can contact the air in multiple directions compared to the sheet-shaped heat sink, so the heat exchange is greater.

[0047] Further, in order to facilitate the assembly of the guide chassis 22 and the bracket base 12, a positioning column can be provided on the guide chassis 22, and a positioning hole can be provided on the bracket base 12. The positioning column is correspondingly inserted into the positioning hole, and the bottom end of the positioning column is inserted into the positioning hole of the bracket base 12. With the positioning column as support, the guide chassis 22 and the bracket base 12 can be spaced to form the above-mentioned convection space 60. The above-mentioned positioning columns and positioning holes can be provided in plurality, and the plurality of positioning columns and the plurality of positioning holes are spaced and correspond to each other, so that the formed assembly structure is more stable.

[0048] Specifically, after the positioning column and the positioning hole are inserted and matched, they can be further fixed and assembled with structures such as screws or bolts to facilitate assembly and disassembly.

[0049] Furthermore, the distance from the inner wall of the guide sleeve 21 in this embodiment to the outer wall of the bracket tube 11 along the width direction of the guide chassis 22 gradually decreases from the end close to the guide chassis 22 to the end far away from the guide chassis 22. The guide channel 50 formed in this way has a larger diameter close to the guide chassis 22, while the space of the guide channel 50 away from the guide chassis 22 is smaller, that is, the guide channel is a tapered channel, which is more conducive to forming chimney efficiency, higher heat exchange efficiency, and better heat dissipation effect.

[0050] Specifically, in this embodiment, the inner diameter of the guide tube can be gradually reduced from one end close to the guide chassis 22 to the end away from the guide chassis 22, so as to form the above-mentioned tapered channel, or the inner diameter of the bracket sleeve can be set to gradually decrease from one end close to the guide chassis 22 to the end away from the guide chassis 22. In short, as long as the above-mentioned guide channel structure that gradually decreases from bottom to top can be formed.

[0051] Furthermore, a plurality of heat dissipation fins are provided on the outer wall of the bracket tube 11, and the plurality of heat dissipation fins are spaced in an array in the circumferential direction, so that the heat in the mixing cavity 13 can be transferred to the outside of the mixing cavity 13 and absorbed by the plurality of heat dissipation fins, and the heat is dissipated by the heat dissipation fins and guided into the guide channel 50, so that the heat dissipation effect is more uniform.

[0052] The heat dissipation fins are made of sheet aluminum material. The sheet structure has a larger heat dissipation surface and can absorb relatively more heat into the guide channel 50. The heat transfer efficiency is higher, which facilitates more heat to enter the guide channel 50 for heat convection and better heat exchange effect.

[0053] It should be noted that the above-mentioned multiple heat dissipation fins can also be arranged on the inner wall of the air duct 20. The specific connection method between the heat dissipation fins and the bracket 10 or the air duct 20 can be an integral molding method or a welding method.

[0054] Furthermore, the outer wall of the light mixer body 13 and the inner wall of the bracket 10 can be connected by a heat-conducting layer. When mixing light, the light of multiple LED chips of different colors of the light source assembly can enter the light-mixing cavity 131. The light mixing generates a large amount of heat. The heat-conducting layer can allow the heat inside the light-mixing cavity 131 to enter the guide channel 50 to a greater extent for heat exchange convection, so that a large amount of heat can be taken away, improving the heat exchange efficiency and heat dissipation performance. The heat-conducting material layer can be arranged between the light mixer body 13 and the bracket, absorbing heat at the light reflection position for effective heat transfer, effectively reducing the heat inside the light-mixing cavity 131, and effectively reducing the working heat of the light source assembly.

[0055] The specific thermal conductive material can be made of thermal conductive silicone, thermal conductive gasket, thermal conductive film and other materials used in the technology.

[0056] Furthermore, the cross-sectional shape of the light mixer body 13 is a polygon, so that the light mixing cavity 131 of the light mixer body 13 can form multiple light mixing surfaces to achieve a light mixing effect.

[0057] Embodiment 2,

[0058] A lighting device includes a light source assembly and the light mixer of Example 1. Specifically, the light source assembly can be connected to a bracket 10 and a light mixing cavity 131 is provided correspondingly, so that the light mixing cavity 131 is used to guide the light of the light source assembly to be mixed and then guided out.

[0059] Specifically, when the lighting device is working, since the light source module corresponds to the light mixing cavity 131, the light generated by the light source module can be mixed under the action of the light mixing cavity 131 of the light mixer body 13, and the generated heat can be concentrated in the light mixing cavity 131. Since there is a gap between the bracket connected to the light mixer body and the air guide cover, the multiple heat dissipation fins 30 in the gap can absorb the heat in the light mixing cavity 131, and the heat absorbed by the heat dissipation fins 30 can be concentrated in the air guide channel 50. Both ends of the air guide channel 50 are directly connected to the outside, so that a chimney effect can be formed, and natural air convection is used to achieve heat exchange, which can effectively improve the air convection heat exchange rate on the heat transfer path, thereby minimizing the heat of the light mixing cavity 131, and then the heat generated by the light source module can be quickly taken away.

[0060] Based on the structure that the bracket 10 has a bracket tube 11 and a bracket base 12, the guide cover 20 and the bracket tube 11 are surrounded by a guide sleeve 21 to form a guide channel 50, and the guide chassis 22 of the guide cover 20 and the bracket base 12 are spaced to form a convection gap 60, so that part of the heat in the mixing cavity 13 can be absorbed by the bracket base 12 and transferred to the air through the convection gap 60, and the other part is absorbed by the heat dissipation fins 30 in the guide channel 50 and enters the guide channel 50, and is taken away in a natural heat exchange manner. Therefore, the overall heat exchange efficiency is high, which effectively reduces the heat generated by the use of the lighting equipment and reduces the working heat of the light source assembly.

[0061] Furthermore, the light source assembly can be a light source substrate 70 and an LED chip structure of the prior art. When assembled, the light source substrate 70 is assembled with the bottom frame base of the bracket 10, and the LED chip can be bonded to the light source substrate 70. In this way, when the light source assembly is working, the heat generated by the LED chip can be transferred to the bracket base 12 of the bracket 10 through the light source substrate 70 for heat dissipation.

[0062] The technical means disclosed in the solution of the utility model are not limited to the technical means disclosed in the above-mentioned implementation mode, but also include technical solutions composed of any combination of the above technical features. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the utility model, and these improvements and modifications are also regarded as the protection scope of the utility model.

Claims

1. A light mixer, characterized in that: include: A light mixer body (13), wherein a light mixing cavity (131) is provided in the light mixer body (13), and the light mixing cavity (131) is used to reflect light emitted by the light source to mix light; A bracket (10), wherein the bracket (10) is sleeved outside the light mixer body (13), and the inner wall of the bracket (10) is connected to the outer wall of the light mixer body (13); A flow guide cover (20), the flow guide cover (20) being sleeved outside the bracket (10), a gap being formed between an inner wall of the flow guide cover (20) and an outer wall of the light mixer body (13), the gap comprising a flow guide channel (50) distributed along a height direction of the flow guide cover (20), and both ends of the gap being connected to the outside; A plurality of heat dissipation fins (30) are provided on the outer wall of the bracket (10), and the heat dissipation fins (30) are located in the guide channel (50).

2. The light mixer according to claim 1, characterized in that: The support (10) comprises a support base (12) and a support tube (11) which are connected to each other, and the support base (12) is arranged around the outer circumference of the bottom end of the support tube (11); The deflector cover (20) comprises a deflector sleeve (21) and a deflector chassis (22) which are connected to each other, and the deflector chassis (22) is arranged around the outer peripheral edge of the bottom end of the deflector sleeve (21); The gap further includes a convection spacer (60) distributed along the width direction of the guide chassis (22); the convection spacer (60) is formed between the inner wall of the guide chassis (22) and the outer wall of the bracket base (12); the guide channel (50) is formed between the inner wall of the guide sleeve (21) and the outer wall of the bracket tube (11); the convection spacer (60) and the guide channel (50) are interconnected.

3. The light mixer according to claim 2, characterized in that: A heat sink (40) is provided in the convection space (60), and the heat sink (40) is in contact with the bracket base (12).

4. The light mixer according to claim 3, characterized in that: The heat sink (40) comprises a heat sink chassis (41) and a plurality of heat sink pins (42); the heat sink chassis (41) is mounted on the bracket base (12); and the plurality of heat sink pins (42) are arranged on a side of the heat sink chassis (41) away from the bracket base (12).

5. The light mixer according to claim 3, characterized in that: The guide chassis (22) is provided with a positioning column, the support base (12) is provided with a positioning hole, and the positioning column is correspondingly inserted into the positioning hole.

6. The light mixer according to claim 2, characterized in that: The distance from the inner wall of the guide sleeve (21) to the outer wall of the support tube (11) along the width direction of the guide chassis (22) gradually decreases from an end close to the guide chassis (22) to an end far from the guide chassis (22).

7. The light mixer according to claim 2, characterized in that: The plurality of heat dissipation fins are distributed in an array on the outer wall of the support tube (11) along the circumferential direction of the support tube (11).

8. The light mixer according to any one of claims 1 to 7, characterized in that: The inner wall of the bracket (10) and the outer wall of the light mixer body (13) are connected via a heat-conducting layer.

9. The light mixer according to any one of claims 1 to 7, characterized in that: The cross-sectional shape of the light mixer body (13) is a polygon.

10. A lighting device, characterized in that: It comprises a light source substrate (70) and a light mixer according to any one of claims 1 to 9; a light source is arranged on the light source substrate (70), and the light mixer is mounted on the light source substrate (70), and the light source is located inside the light mixer.

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