Reflector heat dissipation mechanism and laser projector

Abstract

The invention relates to the technical field of reflecting mirror heat dissipation, and discloses a reflecting mirror heat dissipation mechanism and a laser projector, the reflecting mirror heat dissipation mechanism comprises a light source machine body, the light source machine body comprises a machine shell and a light path system arranged in the machine shell, and the light path system comprises a reflecting mirror body installed in the machine shell through a fixing base; the fixing seat is provided with a heat dissipation assembly used for conducting heat dissipation on the reflector body. The heat dissipation assembly comprises a heat conduction plate arranged on the fixing seat, multiple sets of heat conduction cavities formed in the heat conduction plate, first S-shaped pipe fittings arranged among the multiple sets of heat conduction cavities in a penetrating mode, multiple sets of fins fixed to the heat conduction plate and second S-shaped pipe fittings arranged among the multiple sets of fins in a penetrating mode. According to the reflector heat dissipation mechanism, through the design of the multiple sets of heat dissipation parts, cooling liquid can sequentially pass through the parallel section, the inclined section, the convex section and the backflow section, and after the cooling liquid is subjected to heat dissipation through the parallel section, cooling is achieved through the convex section by means of cooperation of the heat dissipation cover and the heat conduction cover.

Description

Technical Field

[0001] The present invention relates to the technical field of heat dissipation of reflectors, and in particular to a heat dissipation mechanism of a reflector and a laser projector. Background Art

[0002] In a laser projector, the reflector plays a vital role. The working principle of the projector is generally as follows: the light emitted by the light source passes through the optical path system, including reflectors, lenses and other optical components, and is finally focused on the screen to form a clear image. The main function of the reflector is to efficiently reflect light to ensure that the light can be accurately transmitted to the projection lens and finally reach the screen.

[0003] The heat dissipation structure of the projector and the projector disclosed in the existing publication number CN115016210A include a shell; air inlets and air outlets are respectively opened on both sides of the shell, and filters are respectively installed inside them, an air inlet sleeve is connected to the inner wall of the shell, a motor and fan blades are arranged inside the air inlet sleeve, a baffle is arranged on the top surface of the air inlet sleeve, an automatic blocking component is arranged on the inner wall of the air inlet sleeve, and a nozzle is arranged at one end of the air inlet sleeve close to the air inlet. Although the above technical scheme can control the operation of the electromagnet so that the electromagnet repels the baffle, drives the baffle to slide from the sliding cavity into the air inlet sleeve, and blocks the outer end of the air inlet sleeve, and at the same time controls the automatic blocking component to block the inner end of the air inlet sleeve at the same time, so that the fan blades can push the airflow in the closed air inlet sleeve to flow out from the nozzle, and blow off the impurities on the surface of the filter, which can have a "backwashing" effect on the filter.

[0004] However, in the prior art, reflectors themselves usually do not generate heat because their main function is to reflect light rather than convert or absorb electrical energy. However, in actual use, the reflectors will be exposed to strong light from the light source, especially in the case of high-power light sources such as high-pressure mercury lamps or lasers. The temperature of the reflector surface may increase significantly, and the temperature increase has a negative impact on the performance and life of the reflector. In particular, for reflectors using metal coatings or film layers, excessively high temperatures may cause the coating to deform or be damaged, thereby affecting the reflection efficiency and even causing the reflector to fail. With current technology, projectors usually solve the temperature problem of the reflector by directly using fans for heat dissipation. The fan takes away the heat from the reflector surface by forced air flow, thereby reducing its temperature. However, fan heat dissipation mainly relies on air flow to take away the heat. However, in some cases, such as when the light source power is extremely high or the optical path system is compactly designed, the heat dissipation effect of the fan may be insufficient, resulting in the reflector surface temperature still being high, affecting the overall optical performance. Therefore, a new reflector heat dissipation mechanism and laser projector are needed to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to provide a reflector heat dissipation mechanism and a laser projector to solve the problem proposed in the above background technology that the reflector is irradiated by strong light emitted by the light source, resulting in a significant increase in surface temperature. Excessive temperature may cause deformation or damage to the reflector coating, thereby affecting the reflection efficiency.

[0006] The present invention provides a reflector heat dissipation mechanism and a laser projector, which adopt the following technical solutions:

[0007] A reflector heat dissipation mechanism comprises a light source body, the light source body comprises a housing and an optical path system arranged in the housing, the optical path system comprises a reflector body mounted in the housing through a fixing seat, the fixing seat is provided with a heat dissipation component for dissipating heat from the reflector body, the heat dissipation component comprises a heat conduction plate arranged on the fixing seat, a plurality of heat conduction cavities provided in the heat conduction plate, a first S-shaped pipe member passing between the plurality of heat conduction cavities, a plurality of fins fixed on the heat conduction plate, and a second S-shaped pipe member passing between the plurality of fins;

[0008] The first S-shaped pipes each include multiple groups of heat dissipation parts, the multiple groups of heat dissipation parts are connected through each other, the heat dissipation parts each include a parallel section, an inclined section, a convex section and a reflux section, the parallel section, the inclined section, the convex section and the reflux section are connected through each other, the convex section extends to the outside of the heat conduction plate, a heat dissipation cover is fixedly provided outside the heat conduction plate, and multiple groups of heat conduction covers for cooling the convex section are provided inside the heat dissipation cover;

[0009] The heat conductive covers are vertically distributed in the heat dissipation cover, and a plurality of ventilation slots are provided on the heat dissipation cover. Each group of the heat conductive covers is respectively covered outside a plurality of vertically distributed convex sections, and a plurality of grooves matching the convex sections are provided in each group of the heat conductive covers, and a plurality of ventilation holes are provided in each group of the grooves.

[0010] Furthermore, the housing is also provided with a water cooling assembly, which includes a water pump fixedly arranged outside the housing, a circulating water tank, and a diverter box fixed on a fixed seat, the extraction end of the water pump is arranged in the circulating water tank, a liquid infusion pipe is connected between the water outlet end of the water pump and the diverter box, and the diverter box is provided with a first liquid outlet and a second liquid outlet;

[0011] Among them, one end of the first S-shaped pipe fitting is connected to the first liquid outlet, and the other end of the first S-shaped pipe fitting is connected to the circulating water tank. One end of the second S-shaped pipe fitting is connected to the second liquid outlet, and the other end of the second S-shaped pipe fitting is connected to the circulating water tank.

[0012] Furthermore, a switching mechanism for switching between the first liquid outlet and the second liquid outlet is provided in the diverter box, and the switching mechanism includes a main shaft rotatably arranged in the diverter box, a connecting plate fixed on the main shaft, a slide groove provided at both ends of the connecting plate, a slider slidably connected in each group of slide grooves, a connecting frame fixedly connected to each group of sliders, and a water blocking plate fixedly connected to each group of connecting frames;

[0013] The two groups of water blocking plates are respectively located at the first liquid outlet and the second liquid outlet. When the connecting plate is in an inclined state, one group of water blocking plates is away from the first liquid outlet, and the other group of water blocking plates is close to the second liquid outlet.

[0014] Furthermore, the main shaft is provided with a driving mechanism, which includes a gear fixed on the main shaft, a rack plate meshing with the gear, a connecting rod fixedly connected to the rack plate, a spring provided on the connecting rod, and a trigger member provided on the reflector body;

[0015] The trigger component includes a heat-conducting seat installed on the reflector body, a groove opened on the heat-conducting seat, a first metal sheet fixed in the groove, and a second metal sheet fixedly fitted to the first metal sheet. One end of the connecting rod passes through the outside of the infusion tube and slides in contact with the surface of the second metal sheet.

[0016] Furthermore, a disc is fixed on the connecting rod, and two ends of the spring are respectively fixed on the end surface of the disc and the outer wall of the shunt box.

[0017] Furthermore, both sides of each group of water blocking plates are provided with limiting plates, and the limiting plates are fixed in the diversion box.

[0018] Furthermore, the multiple groups of fins are evenly distributed vertically, and the multiple groups of fins are all in contact with the back side of the reflector body.

[0019] Furthermore, a sealing gasket is provided on one side of each group of water blocking plates away from the connecting frame.

[0020] Furthermore, bending pieces are provided between the two sides of the heat conducting plate and the fixing seat respectively, the bending piece and the heat conducting plate are detachably connected via a first bolt, and the bending piece and the fixing seat are detachably connected via a second bolt.

[0021] A laser projector includes the reflector heat dissipation mechanism, a light rod body connected to a light source body for decomposing and processing the light of the light source, a reflective body connected to the light rod body for guiding the processed light, and a lens assembly arranged on the reflective body for focusing and amplifying the light beam and then projecting it onto a projection screen.

[0022] Beneficial effects of the present invention:

[0023] 1. A heat dissipation component and a water cooling component are provided, fins are used to conduct heat to the reflector body, and the heat dissipation of the reflector body is achieved through the coolant flowing through the first S-shaped pipe. Through the design of multiple heat dissipation parts, the coolant can pass through the parallel section, the inclined section, the convex section and the reflux section in sequence. After the coolant is dissipated once through the parallel section, it can be cooled through the convex section by using the cooperation of the heat dissipation cover and the heat conductive cover, which helps to improve the uniformity of heat dissipation, avoid local overheating, and reduce temperature gradients. At the same time, the design of the parallel section, the inclined section, the convex section and the reflux section can effectively alleviate the stress generated during the flow of the coolant, reduce the risk of deformation or rupture of the cooling liquid pipeline, and thus improve the durability and reliability of the cooling liquid pipeline.

[0024] 2. By providing a switching mechanism and a driving mechanism, when the coolant enters the first S-shaped pipe fitting through the first liquid outlet for heat dissipation, the flow path length of the coolant can be increased, so that the coolant can dissipate heat for the reflector body in sections. When the temperature of the reflector body is too high, the different thermal expansion coefficients of the first metal sheet and the second metal sheet can be used to control the main shaft to drive the connecting plate to rotate, thereby switching the use of the first liquid outlet and the second liquid outlet, so that the coolant enters the second S-shaped pipe fitting through the second liquid outlet, can flow quickly, and then take away the heat of the reflector body, thereby improving the heat dissipation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0026] Figure 2 It is a schematic diagram of the three-dimensional structure of the light source body, heat dissipation component and water cooling component of the present invention;

[0027] Figure 3 It is a schematic diagram of the three-dimensional structure of the reflector body, the fixing seat, the heat dissipation assembly, the shunt box, the infusion tube, the first liquid outlet and the second liquid outlet of the present invention;

[0028] Figure 4 It is a schematic diagram of the three-dimensional structure of the reflector body, the fixing seat and the heat dissipation assembly of the present invention;

[0029] Figure 5 It is a schematic diagram of the three-dimensional structure of the first S-shaped pipe fitting of the present invention;

[0030] Figure 6 It is a schematic diagram of the top view of the heat dissipation part of the present invention;

[0031] Figure 7 It is a schematic diagram of the three-dimensional structure of the reflector body, the fixing seat, the fins and the second S-shaped pipe of the present invention;

[0032] Figure 8It is a schematic diagram of the top view of the heat conducting plate, the heat conducting cavity, the fins, the second S-shaped pipe, the heat dissipation cover and the heat conducting cover of the present invention;

[0033] Fig. 9 It is a schematic diagram of the three-dimensional structure of the heat dissipation cover and the heat conductive cover of the present invention;

[0034] Fig.10 It is a schematic cross-sectional view of the three-dimensional structure of the reflector body, the fixing seat, the switching mechanism and the driving mechanism of the present invention;

[0035] Fig.11 It is a schematic diagram of a top view of the structure section of the reflector body, the fixing seat and the diverter box of the present invention;

[0036] Fig.12 It is a three-dimensional structural schematic diagram of the rack plate, connecting rod and trigger member of the present invention;

[0037] Fig.13 It is a schematic diagram of the bending state of the three-dimensional structure of the trigger member of the present invention.

[0038] In the figure:

[0039] 1. Light source body; 11. Housing; 12. Reflector body; 13. Fixing seat; 2. Light rod body; 3. Reflector body; 4. Lens assembly; 5. Heat dissipation assembly; 51. Heat conduction plate; 511. Bending piece; 512. First bolt; 513. Second bolt; 52. Heat conduction cavity; 53. First S-shaped pipe fitting; 531. Heat dissipation part; 5311. Parallel section; 5312. Inclined section; 5313. Convex section; 5314. Reflux section; 54. Fins; 55. Second S-shaped pipe fitting; 56. Heat dissipation cover; 561. Ventilation slot; 57. Heat conduction cover; 571. Groove; 572 , ventilation hole; 6, water cooling component; 61, water pump; 62, circulating water tank; 63, shunt box; 64, infusion tube; 65, first liquid outlet; 66, second liquid outlet; 7, switching mechanism; 71, main shaft; 72, connecting plate; 73, slide groove; 74, slider; 75, connecting frame; 76, water blocking plate; 761, sealing gasket; 77, limit plate; 8, driving mechanism; 81, gear; 82, rack plate; 83, connecting rod; 831, disc; 84, spring; 85, trigger; 851, thermal seat; 852, slot; 853, first metal sheet; 854, second metal sheet. DETAILED DESCRIPTION

[0040] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0041] Reference Figure 1-Figure 2The present application provides a reflector heat dissipation mechanism, including a light source body 1, the light source body 1 including a housing 11 and an optical path system arranged in the housing 11, the optical path system including a reflector body 12 installed in the housing 11 through a fixing seat 13, a heat dissipation component 5 for dissipating heat from the reflector body 12 is arranged on the fixing seat 13, because the reflector will be irradiated by strong light emitted by the light source, especially in the case of a high-power light source such as a high-pressure mercury lamp or a laser, the temperature of the reflector surface may be significantly increased, therefore, the heat dissipation component 5 is arranged at the two groups of reflector bodies 12 closest to the light source;

[0042] Specifically, refer to Figure 3-Figure 8 The heat dissipation assembly 5 includes a heat conducting plate 51 disposed on the fixing seat 13, a plurality of heat conducting cavities 52 provided in the heat conducting plate 51, a first S-shaped pipe 53 passing through the plurality of heat conducting cavities 52, a plurality of fins 54 fixed on the heat conducting plate 51, and a second S-shaped pipe 55 passing through the plurality of fins 54, the plurality of fins 54 are evenly distributed vertically, the plurality of fins 54 are all in contact with the back of the reflector body 12, the fins 54 are used to conduct heat to the reflector body 12, so that heat is introduced into the heat conducting cavity 52 through the fins 54, and then heat is dissipated through the coolant flowing through the first S-shaped pipe 53;

[0043] It is worth noting that the first S-shaped pipe 53 includes a plurality of heat dissipation parts 531, and the plurality of heat dissipation parts 531 are connected to each other. The heat dissipation parts 531 include a parallel section 5311, an inclined section 5312, a convex section 5313 and a return section 5314. The parallel section 5311, the inclined section 5312, the convex section 5313 and the return section 5314 are connected to each other. The convex section 5313 extends to the outside of the heat conducting plate 51. A heat dissipation cover 56 is fixed to the outside of the heat conducting plate 51. A plurality of heat-conducting covers 57 for cooling the convex section 5313 are arranged in the cover 56. The coolant flows into the parallel section 5311 to absorb the heat of the reflector body 12. The coolant enters the convex section 5313 through the inclined section 5312. The convex section 5313 penetrates to the outside of the heat-conducting plate 51. Therefore, the coolant is cooled in the convex section 5313. Then, the coolant enters the next parallel section 5311 through the reflux section 5314 again to absorb the heat of the reflector body 12.

[0044] Through the design of multiple groups of heat dissipation parts 531, the coolant can pass through the parallel section 5311, the inclined section 5312, the convex section 5313 and the reflux section 5314 in sequence to achieve multiple heat dissipation and cooling cycles, thereby improving the stable temperature of the reflector body 12 under long-term high-power working conditions, reducing temperature gradients, and improving heat dissipation effects. At the same time, the design of the parallel section 5311, the inclined section 5312, the convex section 5313 and the reflux section 5314 can effectively alleviate the stress generated during the flow of the coolant, reduce the risk of deformation or rupture of the cooling liquid pipeline, and thereby improve the durability and reliability of the equipment.

[0045] Specifically, refer to Fig. 9 The heat-conducting cover 57 is vertically distributed in the heat dissipation cover 56, and a plurality of ventilation grooves 561 are provided on the heat dissipation cover 56. Each group of heat-conducting covers 57 is respectively provided outside the plurality of convex sections 5313 vertically distributed. A plurality of grooves 571 matching the convex sections 5313 are provided in each group of heat-conducting covers 57, and a plurality of ventilation holes 572 are provided in each group of grooves 571. By providing the grooves 571 matching the convex sections 5313, the heat of the coolant entering the convex sections 5313 can be effectively transferred, and the ventilation grooves 561 and ventilation holes 572 can accelerate the transfer of heat to the outside. At the same time, a plurality of hole grooves for ventilation and heat dissipation are provided on the housing 11.

[0046] Further, see Figure 4 Bending pieces 511 are respectively provided between the two sides of the heat conducting plate 51 and the fixing seat 13. The bending piece 511 and the heat conducting plate 51 are detachably connected by a first bolt 512, and the bending piece 511 and the fixing seat 13 are detachably connected by a second bolt 513. With the cooperation of the bending piece 511, the first bolt 512 and the second bolt 513, the heat dissipation assembly 5 can be conveniently installed as a whole on the fixing seat 13 to dissipate heat for the reflector body 12.

[0047] The housing 11 is also provided with a water cooling assembly 6;

[0048] Specifically, refer to Figure 2-Figure 4The water cooling assembly 6 includes a water pump 61 fixedly arranged outside the housing 11, a circulating water tank 62, and a diverter box 63 fixed on the fixing seat 13. The extraction end of the water pump 61 is arranged in the circulating water tank 62. The water pump 61 is a double-outlet water pump. The double water outlet ends of the water pump 61 are respectively connected to the diverter box 63 through a liquid infusion pipe 64. The diverter box 63 is provided with a first liquid outlet 65 and a second liquid outlet 66. One end of the first S-shaped pipe fitting 53 is connected to the first liquid outlet 65, the other end of the first S-shaped pipe fitting 53 is connected to the circulating water tank 62, and one end of the second S-shaped pipe fitting 55 is connected to the second liquid outlet 66. The other end of the second S-shaped pipe fitting 55 is through-connected with the circulating water tank 62, and the coolant in the circulating water tank 62 is extracted by the water pump 61, and then transmitted to the diversion box 63 through the infusion tube 64, and then enters the first S-shaped pipe fitting 53 or the second S-shaped pipe fitting 55 through the first liquid outlet 65 or the second liquid outlet 66 to dissipate the heat of the reflector body 12, wherein the other ends of the first S-shaped pipe fitting 53 and the second S-shaped pipe fitting 55 can be through-connected with the circulating water tank 62 through an external hose, and the coolant after heat dissipation returns to the circulating water tank 62 again, thereby realizing the circulation of the coolant.

[0049] A switching mechanism 7 for switching between the first liquid outlet 65 and the second liquid outlet 66 is provided in the diverter box 63;

[0050] Specifically, refer to Figure 10-11 The switching mechanism 7 includes a main shaft 71 rotatably arranged in the shunt box 63, a connecting plate 72 fixed on the main shaft 71, slide grooves 73 provided at both ends of the connecting plate 72, sliders 74 slidably connected to each group of slide grooves 73, a connecting frame 75 fixedly connected to each group of sliders 74, and a water blocking plate 76 fixedly connected to each group of connecting frames 75. The main shaft 71 is rotatably connected to the shunt box 63 through a bearing;

[0051] The two groups of water blocking plates 76 are respectively located at the first liquid outlet 65 and the second liquid outlet 66 . When the connecting plate 72 is in an inclined state, one group of water blocking plates 76 is away from the first liquid outlet 65 , and the other group of water blocking plates 76 is attached to the second liquid outlet 66 .

[0052] Through the above-mentioned structure cooperation, the main shaft 71 is controlled to rotate. When the connecting plate 72 is tilted at a certain angle, through the sliding cooperation between the slide groove 73 and the slider 74, a group of water blocking plates 76 can be controlled to move away from the first liquid outlet 65, so that the coolant enters the first S-shaped pipe 53 through the first liquid outlet 65 to achieve heat dissipation of the reflector body 12. At the same time, another group of water blocking plates 76 is controlled to approach the second liquid outlet 66 and fit the second liquid outlet 66, so that the coolant does not flow out through the second liquid outlet 66. When the connecting plate 72 rotates in the opposite direction at a certain angle, the use of the first liquid outlet 65 and the second liquid outlet 66 can be switched.

[0053] It should be noted that when the coolant enters the first S-shaped pipe fitting 53 through the first liquid outlet 65 for heat dissipation, the flow path length of the coolant can be increased, so that the coolant can dissipate heat for the reflector body 12 in sections, and after the coolant dissipates heat once through the parallel section 5311, it can be cooled through the convex section 5313, which helps to improve the uniformity of heat dissipation, avoid local overheating, and reduce temperature gradients. At the same time, it has the advantage of protecting the first S-shaped pipe fitting 53. When the temperature of the reflector body 12 is too high, the use of the first liquid outlet 65 and the second liquid outlet 66 can be switched so that the coolant enters the second S-shaped pipe fitting 55 through the second liquid outlet 66, so that the coolant can quickly pass through the second S-shaped pipe fitting 55, thereby quickly taking away the heat of the reflector body 12 and improving the heat dissipation efficiency.

[0054] Furthermore, a driving mechanism 8 is provided on the main shaft 71;

[0055] Specifically, refer to Figure 10-13 The driving mechanism 8 includes a gear 81 fixed on the main shaft 71, a rack plate 82 meshing with the gear 81, a connecting rod 83 fixedly connected to the rack plate 82, a spring 84 arranged on the connecting rod 83, and a trigger member 85 arranged on the reflector body 12;

[0056] The trigger member 85 includes a heat-conducting seat 851 installed on the reflector body 12, a slot 852 provided on the heat-conducting seat 851, a first metal sheet 853 fixed in the slot 852, and a second metal sheet 854 fixedly fitted with the first metal sheet 853. The end of the connecting rod 83 away from the rack plate 82 passes through the outside of the infusion tube 64 and is in sliding contact with the surface of the second metal sheet 854. The first metal sheet 853 can be a copper sheet and the second metal sheet 854 can be a stainless steel sheet. When the reflector body 12 is overheated due to long-term high-power operation, the heat will be transferred to the first metal sheet 853 on the heat-conducting seat 851. After the first metal sheet 853 absorbs the heat, the temperature gradually rises. Since the thermal expansion coefficients of the first metal sheet 853 and the second metal sheet 854 are different, when the first metal sheet 853 is a copper sheet and the second metal sheet 854 is a stainless steel sheet, the heat of the stainless steel sheet The expansion coefficient is relatively low, while the thermal expansion coefficient of the copper sheet is relatively high. Since the first metal sheet 853 part which is a copper sheet has good thermal conductivity, it is heated quickly and the temperature rises quickly, while the second metal sheet 854 part which is a stainless steel sheet has a lower thermal expansion coefficient and heats up relatively slowly. Therefore, when the reflector body 12 is overheated due to long-term high-power operation, the first metal sheet 853 part which is a copper sheet will expand more, while the second metal sheet 854 part which is a stainless steel sheet will expand less. Due to the uneven thermal expansion, stress will be generated in the metal sheets, causing bending, that is, the first metal sheet 853 and the second metal sheet 854 will bend toward the connecting rod 83, and then push the connecting rod 83, so that the connecting rod 83 drives the rack plate 82 to move, and the meshing of the rack plate 82 and the gear 81 is used to control the rotation of the main shaft 71, and then switch the use between the first liquid outlet 65 and the second liquid outlet 66.

[0057] A disc 831 is fixed on the connecting rod 83, and the two ends of the spring 84 are respectively fixed to the end surface of the disc 831 and the outer wall of the shunt box 63. Through the setting of the spring 84, after the temperature of the reflector body 12 is normal and the first metal sheet 853 and the second metal sheet 854 are reset, the two groups of water blocking plates 76 can be controlled to reset, that is, one group of water blocking plates 76 is controlled to be away from the first liquid outlet 65, so that the coolant enters the first S-shaped pipe fitting 53 through the first liquid outlet 65 to achieve heat dissipation of the reflector body 12, and the other group of water blocking plates 76 is close to the second liquid outlet 66 and fits at the second liquid outlet 66, so that the coolant does not flow out through the second liquid outlet 66, thereby protecting the first S-shaped pipe fitting 53 and the second S-shaped pipe fitting 55.

[0058] Among them, both sides of each set of water blocking plates 76 are provided with limit plates 77, and the limit plates 77 are fixed in the diversion box 63. The two sides of the water blocking plates 76 are in sliding contact with the inner side of the limit plates 77. The setting of the limit plates 77 serves the purpose of limiting and guiding the water blocking plates 76.

[0059] A sealing gasket 761 is provided on one side of each set of water blocking plates 76 away from the connecting frame 75 , and the sealing gasket 761 is provided to achieve a sealing effect.

[0060] The working principle of a heat dissipation mechanism for a reflector is as follows: during use, first, by starting the water pump 61, the water pump 61 extracts the coolant in the circulating water tank 62, and then the coolant enters the infusion pipe 64 through the water outlet end of the water pump 61 and is transported to the shunt box 63. At this time, since the temperature of the reflector body 12 is normal, the first metal sheet 853 and the second metal sheet 854 are in the slot 852, and at the same time, the connecting plate 72 is rotated by a certain angle under the elastic stretching of the spring 84. By utilizing the sliding cooperation between the slide groove 73 and the slider 74, one group of water blocking plates 76 is controlled to be away from the first liquid outlet 65, and the other group of water blocking plates 76 is controlled to be close to the second liquid outlet 66 and attached to the second liquid outlet 66. Therefore, when the coolant is transported to the shunt box 63, the coolant enters the first S-shaped pipe 53 through the first liquid outlet 65 to achieve heat dissipation of the reflector body 12;

[0061] Since the fins 54 are used to conduct heat to the reflector body 12, the heat generated by the reflector body 12 is introduced into the heat conduction cavity 52 through the fins 54. When the coolant flows into the parallel section 5311, the heat of the reflector body 12 is absorbed. When the coolant continues to flow and enters the convex section 5313 through the inclined section 5312, the heat in the coolant entering the convex section 5313 is transferred through the groove 571 opened on the heat conductive cover 57. Then, the heat transfer is accelerated through the ventilation grooves 561 and the ventilation holes 572. At the same time, the multiple groups of holes and grooves opened on the casing 11 are used to transfer the heat to the outside. Then, as the coolant flows, the coolant after heat dissipation returns to the circulating water tank 62 through the hose again, thereby realizing the circulation of the coolant and the protection of the coolant pipeline.

[0062] When the reflector body 12 is overheated due to long-term high-power operation, the first metal sheet 853, which is a copper sheet, will expand more, while the second metal sheet 854, which is a stainless steel sheet, will expand less. Due to the uneven thermal expansion, stress will be generated in the metal sheets, thereby causing bending, that is, the first metal sheet 853 and the second metal sheet 854 will bend toward the connecting rod 83, and then push the connecting rod 83, and at the same time squeeze the spring 84, so that the connecting rod 83 drives the rack plate 82 to move. When the rack plate 82 moves, the control gear 81 drives the main shaft 71 to rotate. At this time, the connecting plate 72 rotates at a certain angle. The first liquid outlet 65 is reversed, and the sliding groove 73 and the slider 74 are slidably matched to control a group of water blocking plates 76 that were originally far away from the first liquid outlet 65 to approach the first liquid outlet 65 and fit the first liquid outlet 65, so that the coolant no longer continues to enter the first S-shaped pipe 53 through the first liquid outlet 65, and the other group of water blocking plates 76 that were originally fitted at the second liquid outlet 66 is away from the second liquid outlet 66. At this time, the coolant enters the second S-shaped pipe 55 through the second liquid outlet 66, and the coolant quickly takes away the heat of the reflector body 12 through the second S-shaped pipe 55, thereby improving the heat dissipation efficiency.

[0063] Reference Figure 1 The present application also provides a laser projector, including a reflector heat dissipation mechanism, and also includes a light rod body 2 connected to a light source body 1 for decomposing and processing the light of the light source, a reflective body 3 connected to the light rod body 2 for guiding the processed light, and a lens assembly 4 arranged on the reflective body 3 for focusing and amplifying the light beam and then projecting it onto a projection screen;

[0064] Among them, the light source body 1 is the core component of the projection, which is mainly responsible for generating the laser light source. The laser light source is reflected multiple times by the reflector body 12 to ensure that the light is effectively guided and enters the light stick body 2;

[0065] The light rod body 2 is responsible for receiving the light from the light source body 1, decomposing and modulating the light through optical elements (liquid crystal display LCD or DLP chip), and converting the input laser light signal into an image with color information;

[0066] The reflective body 3 is responsible for guiding and processing the image light output from the light stick body 2. The reflective body 3 is connected to the light stick body 2 and can be used to further focus and direct the light through a lens or an optical element.

[0067] The lens assembly 4 disposed on the reflective body 3 is responsible for focusing and amplifying the processed light beam, and finally projects the formed image onto the projection screen.

[0068] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A reflector heat dissipation mechanism, comprising a light source body (1), the light source body (1) comprising a housing (11) and an optical path system arranged in the housing (11), the optical path system comprising a reflector body (12) mounted in the housing (11) via a fixing seat (13), characterized in that: The fixing seat (13) is provided with a heat dissipation assembly (5) for dissipating heat from the reflector body (12), the heat dissipation assembly (5) comprising a heat conduction plate (51) provided on the fixing seat (13), a plurality of heat conduction cavities (52) provided in the heat conduction plate (51), a first S-shaped pipe member (53) passing between the plurality of heat conduction cavities (52), a plurality of fins (54) fixed on the heat conduction plate (51), and a second S-shaped pipe member (55) passing between the plurality of fins (54); The first S-shaped pipe member (53) comprises a plurality of heat dissipation parts (531), the plurality of heat dissipation parts (531) are connected to each other, the heat dissipation parts (531) comprise a parallel section (5311), an inclined section (5312), a convex section (5313) and a return section (5314), the parallel section (5311), the inclined section (5312), the convex section (5313) and the return section (5314) are connected to each other, the convex section (5313) extends to the outside of the heat conducting plate (51), a heat dissipation cover (56) is fixedly provided outside the heat conducting plate (51), and a plurality of heat conducting covers (57) for cooling the convex section (5313) are provided inside the heat dissipation cover (56); The heat-conducting covers (57) are vertically distributed inside the heat-dissipating cover (56), and a plurality of ventilation slots (561) are provided on the heat-dissipating cover (56). Each group of the heat-conducting covers (57) is respectively provided outside a plurality of vertically distributed convex sections (5313), and a plurality of grooves (571) matching the convex sections (5313) are provided inside each group of the heat-conducting covers (57), and a plurality of ventilation holes (572) are provided inside each group of the grooves (571).

2. The reflector heat dissipation mechanism according to claim 1, characterized in that: The housing (11) is also provided with a water cooling assembly (6), the water cooling assembly (6) comprising a water pump (61) fixedly arranged outside the housing (11), a circulating water tank (62), and a diverter box (63) fixed on a fixing seat (13); the extraction end of the water pump (61) is arranged in the circulating water tank (62); a liquid infusion pipe (64) is connected between the water outlet end of the water pump (61) and the diverter box (63); and a first liquid outlet (65) and a second liquid outlet (66) are provided on the diverter box (63); One end of the first S-shaped pipe fitting (53) is connected to the first liquid outlet (65), and the other end of the first S-shaped pipe fitting (53) is connected to the circulating water tank (62). One end of the second S-shaped pipe fitting (55) is connected to the second liquid outlet (66), and the other end of the second S-shaped pipe fitting (55) is connected to the circulating water tank (62).

3. The reflector heat dissipation mechanism according to claim 2, characterized in that: The diverter box (63) is provided with a switching mechanism (7) for switching between the first liquid outlet (65) and the second liquid outlet (66), the switching mechanism (7) comprising a main shaft (71) rotatably arranged in the diverter box (63), a connecting plate (72) fixed on the main shaft (71), sliding grooves (73) provided at both ends of the connecting plate (72), a slider (74) slidably connected in each group of the sliding grooves (73), a connecting frame (75) fixedly connected to each group of the sliders (74), and a water blocking plate (76) fixedly connected to each group of the connecting frame (75); The two groups of water blocking plates (76) are respectively located at the first liquid outlet (65) and the second liquid outlet (66); when the connecting plate (72) is in an inclined state, one group of water blocking plates (76) is away from the first liquid outlet (65), and the other group of water blocking plates (76) is in contact with the second liquid outlet (66).

4. The reflector heat dissipation mechanism according to claim 3, characterized in that: The main shaft (71) is provided with a driving mechanism (8), the driving mechanism (8) comprising a gear (81) fixed on the main shaft (71), a rack plate (82) meshing with the gear (81), a connecting rod (83) fixedly connected to the rack plate (82), a spring (84) provided on the connecting rod (83), and a trigger member (85) provided on the reflector body (12); The trigger member (85) comprises a heat-conducting seat (851) mounted on the reflector body (12), a slot (852) provided on the heat-conducting seat (851), a first metal sheet (853) fixed in the slot (852), and a second metal sheet (854) fixedly fitted to the first metal sheet (853); one end of the connecting rod (83) passes through the outside of the infusion tube (64) and is in sliding contact with the surface of the second metal sheet (854).

5. The reflector heat dissipation mechanism according to claim 4, characterized in that: A disc (831) is fixed on the connecting rod (83), and two ends of the spring (84) are respectively fixed on the end surface of the disc (831) and the outer wall of the diverter box (63).

6. The reflector heat dissipation mechanism according to claim 3, characterized in that: Limiting plates (77) are provided on both sides of each group of water blocking plates (76), and the limiting plates (77) are fixed in the diversion box (63).

7. The reflector heat dissipation mechanism according to claim 1, characterized in that: The multiple groups of fins (54) are evenly distributed vertically, and the multiple groups of fins (54) are all in contact with the back side of the reflector body (12).

8. The reflector heat dissipation mechanism according to claim 3, characterized in that: A sealing gasket (761) is provided on one side of each group of water blocking plates (76) away from the connecting frame (75).

9. The reflector heat dissipation mechanism according to claim 1, characterized in that: Bending pieces (511) are respectively provided between the two sides of the heat conducting plate (51) and the fixing seat (13); the bending piece (511) and the heat conducting plate (51) are detachably connected via a first bolt (512); and the bending piece (511) and the fixing seat (13) are detachably connected via a second bolt (513).

10. A laser projector, comprising the reflector heat dissipation mechanism according to any one of claims 1 to 9, characterized in that: It also includes a light rod body (2) connected to the light source body (1) and used for decomposing and processing the light of the light source, a reflective body (3) connected to the light rod body (2) and used for guiding the processed light, and a lens assembly (4) arranged on the reflective body (3) and used for focusing and magnifying the light beam and then projecting it onto a projection screen.

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