An assembled wavelength conversion device

Abstract

The present invention provides an assembled wavelength conversion device, which includes a refrigeration box, a fan, a cylinder body, a first end cover and a transparent second end cover. A closed space is formed among the first end cover, the second end cover and the cylinder body. A clamping cavity is arranged inside the cylinder wall of the cylinder body, and a plurality of air outlet holes communicated with the clamping cavity are arranged on the inner side wall of the cylinder body; A ring body is arranged inside the first end cover, and an annular channel is formed between the ring body and the inner side wall of the first end cover, and the annular channel is communicated with the clamping cavity; A exhaust pipe is communicated in the middle of the end face of the first end cover, and the exhaust pipe is communicated with an extraction pipe through a rotary joint. The other end of the extraction pipe is connected with a fluorescent color wheel, and the fluorescent color wheel is driven by a motor. Suction holes are arranged on the side wall of the extraction pipe; An air inlet pipe communicated with the annular channel is arranged on the outer end face of the first end cover; The fan, the refrigeration box, the clamping cavity and the closed space form a circulating air duct; It has an assembled structure, which is convenient for disassembly and assembly, convenient for the maintenance or replacement of internal parts, and can dissipate heat from internal components, prolonging the service life of the equipment.

Description

Technical Field

[0001] The present invention relates to the field of wavelength conversion devices for projection equipment, and more specifically, to an assembled wavelength conversion device. Background Art

[0002] The fluorescent color wheel is an important optical element in projection equipment, which is used for the excitation and emission of light. However, since the conversion efficiency of the fluorescent material is often not higher than 80%, and in many cases it is about 50%, a large amount of heat will be generated when the fluorescent material emits light. As a result, the fluorescent material and even the entire color wheel will be heated up, and finally reach thermal equilibrium. As the light intensity and light power of the excitation light increase, the temperature of the color wheel at thermal equilibrium will become higher and higher. For example, when the light power of the excitation light reaches 30W, the temperature of the fluorescent material will be higher than 120°C, and the heat of the fluorescent material will be transferred to the substrate and the driving device at the same time, resulting in an increase in the temperature of the substrate and the driving device.

[0003] However, there is an upper limit to the operating temperature of the driving device. Generally speaking, this upper limit is about 85°C. Exceeding this upper limit will significantly reduce the service life of the driving device. For example, in an open 25°C environment, the operating temperature of the motor of the color wheel is 41.5°C, so the life of the motor can exceed 20,000 hours; while in a closed 25°C environment, the operating temperature of the motor of the color wheel will exceed 100°C, so the service life of the motor will be significantly reduced, thus seriously affecting the service life of the entire light source. Therefore, in order to ensure the service life of the entire light source, in the prior art, the color wheel operates in an open environment; however, since the operating environment of the color wheel is open, dust will affect the service life of the motor and the light-emitting efficiency of the fluorescent material, thereby reducing the service life and light-emitting efficiency of the entire light source. Therefore, the dust-proof and heat-dissipation problems of the color wheel have become a pair of contradictory problems that cannot be taken into account at the same time. Summary of the Invention

[0004] In order to overcome the defects of the prior art, the technical problem to be solved by the present invention is to provide an assembled wavelength conversion device, which has a novel structure, is an assembled structure, is convenient for disassembly and assembly, is convenient for overhauling or replacing internal parts, and can perform air-cooled heat dissipation on internal components, thereby extending the service life of the equipment.

[0005] To achieve this purpose, the present invention adopts the following technical solutions:

[0006] The present invention provides an assembled wavelength conversion device, which includes a cylinder body with open ends, a first end cover and a second end cover threadedly connected to both ends of the cylinder body. A closed space is formed between the first end cover, the second end cover and the cylinder body, and the second end cover is a transparent structure; a clamping cavity is arranged inside the cylinder wall of the cylinder body. One end of the clamping cavity away from the second end cover extends to the end of the cylinder body and is connected to the outside. A plurality of air outlet holes are arranged on the inner side wall of the cylinder body, and the air outlet holes are communicated with the clamping cavity; a ring body is fixedly arranged inside the first end cover. An annular channel is formed between the outer wall of the ring body and the inner side wall of the first end cover. When the first end cover is matched with the cylinder body, the annular channel is communicated with the clamping cavity; a exhaust pipe is communicated in the middle of the end face of the first end cover. The inner end of the exhaust pipe is communicated with an air extraction pipe through a rotary joint. The other end of the air extraction pipe is fixedly connected to the middle of a fluorescent color wheel. The fluorescent color wheel is driven by a motor. An air suction hole communicated with the inside of the air extraction pipe is arranged on the side wall of the air extraction pipe; an air inlet pipe is arranged on the outer end face of the first end cover, and the air inlet pipe is communicated with the annular channel; a refrigeration box and a blower are installed on the outer end face of the first end cover. The air inlet of the blower is communicated with the exhaust pipe through a first pipeline, the air outlet of the blower is communicated with the air inlet of the refrigeration box through a second pipeline, and the air outlet of the refrigeration box is communicated with the air inlet pipe through a third pipeline.

[0007] In a preferred technical solution of the present invention, a mounting plate is fixedly arranged on the inner end face of the first end cover. At least two bearing seats are installed on one side of the mounting plate close to the exhaust pipe. The air extraction pipe passes through the two bearing seats; the motor is installed on the mounting plate. A first gear is fixedly arranged on the output shaft of the motor. A second gear is fixedly arranged on the outer wall of the air extraction pipe. The first gear and the second gear are meshed and driven.

[0008] In a preferred technical solution of the present invention, the air suction hole is located on the side wall of the air extraction pipe close to the fluorescent color wheel.

[0009] In a preferred technical solution of the present invention, a plurality of heat dissipation columns are fixedly arranged on the end face of the fluorescent color wheel close to the air extraction pipe. The heat dissipation columns are made of graphene.

[0010] In a preferred technical solution of the present invention, a plurality of support blocks are fixedly arranged on the inner wall of the open end of the clamping cavity. The plurality of support blocks are distributed in a circumferential array around the axis of the cylinder body.

[0011] In a preferred technical solution of the present invention, a plurality of mounting supports are fixedly arranged on the outer wall end face of the first end cover for mounting the refrigeration box and the blower.

[0012] In a preferred technical solution of the present invention, the refrigeration box includes a box body and refrigeration sheets fixedly installed on two opposite inner walls of the box body. A plurality of heat conduction sheets are arranged between the two refrigeration sheets, and two ends of each heat conduction sheet are respectively in contact with and abutted against the refrigerating surfaces of the refrigeration sheets; the air flow entering the interior of the box body passes through the heat conduction sheets and then is discharged from the air outlet.

[0013] The beneficial effects of the present invention are as follows:

[0014] An assembled wavelength conversion device provided by the present invention has a novel structure. The cylindrical body is in threaded connection and cooperation with the first end cover and the second end cover, which is convenient for disassembly and assembly, and facilitates the maintenance or replacement of internal components such as motors, fluorescent color wheels, and exhaust pipes; moreover, a closed circulation air duct is formed among the closed space, the clamping cavity, the air outlet holes, the exhaust pipe, the air suction holes, the fan, and the refrigeration box, preventing the exchange of air with the outside and reducing the entry of dust; the refrigerated air flow can also be sent into the closed space to dissipate heat from the internal motor and fluorescent color wheel. The air flow after absorbing heat is then discharged through the exhaust pipe, extending the residence time of the supplied refrigerated air flow in the closed space, fully absorbing heat, thereby completing air-cooled heat dissipation and extending the service life of the equipment. Description of the Drawings

[0015] Figure 1 is a schematic structural diagram of an assembled wavelength conversion device provided in a specific embodiment of the present invention;

[0016] Figure 2 is a three-dimensional structural diagram of the cylindrical body provided in a specific embodiment of the present invention;

[0017] Figure 3 is a first-angle three-dimensional structural diagram of the first end cover provided in a specific embodiment of the present invention;

[0018] Figure 4 is a second-angle three-dimensional structural diagram of the first end cover provided in a specific embodiment of the present invention;

[0019] Figure 5 is a schematic diagram of the installation positions of the first end cover, the refrigeration box, and the fan provided in a specific embodiment of the present invention;

[0020] Figure 6 is a three-dimensional structural diagram of the second end cover provided in a specific embodiment of the present invention;

[0021] Figure 7 is a schematic diagram of the internal structure of the refrigeration box provided in a specific embodiment of the present invention.

[0022] In the figure:

[0023] 100, Cylinder body; 110, Clamping cavity; 120, Air outlet hole; 130, Support block; 200, First end cover; 210, Ring body; 220, Annular channel; 230, Exhaust pipe; 240, Intake pipe; 250, Mounting plate; 260, Bearing seat; 270, Mounting fulcrum; 300, Second end cover; 410, Rotary joint; 420, Suction pipe; 421, Suction hole; 422, Second gear; 430, Fluorescent color wheel; 431, Heat dissipation column; 440, Motor; 441, First gear; 500, Refrigeration box; 510, Box body; 520, Refrigeration sheet; 530, Heat conducting sheet; 600, Fan; 710, First pipe; 720, Second pipe; 730, Third pipe. Detailed implementation mode

[0024] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings and through specific implementation modes.

[0025] As Figures 1 to 6 shown, in a specific embodiment of the present invention, an assembled wavelength conversion device is disclosed, including a cylinder body 100 with both ends open, a first end cover 200 and a second end cover 300 threadedly connected to both ends of the cylinder body 100. A closed space is formed between the first end cover 200, the second end cover 300 and the cylinder body 100, and the second end cover 300 is a transparent structure; As Figure 2 shown, a clamping cavity 110 is provided inside the cylinder wall of the cylinder body 100. One end of the clamping cavity 110 away from the second end cover 300 extends to the end of the cylinder body 100 and is connected to the outside. A plurality of air outlet holes 120 are provided on the inner side wall of the cylinder body 100, and the air outlet holes 120 are communicated with the clamping cavity 110; As Figure 3 , Figure 4 shown, a ring body 210 is fixedly provided inside the first end cover 200. An annular channel 220 is formed between the outer wall of the ring body 210 and the inner side wall of the first end cover 200. When the first end cover 200 is matched with the cylinder body 100, the annular channel 220 is communicated with the clamping cavity 110; A middle part of the end face of the first end cover 200 is communicated with an exhaust pipe 230. The inner end of the exhaust pipe 230 is communicated with a suction pipe 420 through a rotary joint 410. The other end of the suction pipe 420 is fixedly connected to the middle part of a fluorescent color wheel 430. The fluorescent color wheel 430 is driven by a motor 440. A suction hole 421 communicated with the inside of the suction pipe 420 is provided on the side wall of the suction pipe 420; An intake pipe 240 is provided on the outer end face of the first end cover 200, and the intake pipe 240 is communicated with the annular channel 220; As Figure 5As shown, a refrigeration box 500 and a fan 600 are installed on the outer end face of the first end cover 200. The air inlet of the fan 600 is communicated with the exhaust pipe 230 through a first pipeline 710. The air outlet of the fan 600 is communicated with the air inlet of the refrigeration box 500 through a second pipeline 720. The air outlet of the refrigeration box 500 is communicated with the intake pipe 240 through a third pipeline 730.

[0026] The above-mentioned assembled wavelength conversion device has a novel structure. The cylinder body 100 is in threaded connection and cooperation with the first end cover 200 and the second end cover 300, which is convenient for disassembly and assembly, and is convenient for overhauling or replacing components such as the internal motor 440, fluorescent color wheel 430, and exhaust pipe 420. Moreover, a closed circulation air duct is formed among the closed space, the clamping cavity 110, the air outlet hole 120, the exhaust pipe 420, the air suction hole 421, the fan 600, and the refrigeration box 500, preventing the exchange of external air flow and reducing the entry of dust. The cooled air flow can also be sent into the closed space to dissipate heat from the internal motor 440 and fluorescent color wheel 430. The air flow after absorbing heat is then discharged through the exhaust pipe 420, extending the residence time of the supplied refrigerated air flow in the closed space, fully absorbing heat, thereby completing air-cooled heat dissipation and extending the service life of the equipment.

[0027] Furthermore, an installation plate 250 is fixedly arranged on the inner end face of the first end cover 200. At least two bearing seats 260 are installed on one side of the installation plate 250 close to the exhaust pipe 240. The exhaust pipe 420 passes through the two bearing seats 260. The motor 440 is installed on the installation plate 250. A first gear 441 is fixedly arranged on the output shaft of the motor 440. A second gear 422 is fixedly arranged on the outer wall of the exhaust pipe 420. The first gear 441 is in meshing transmission with the second gear 422. This structural design can facilitate the installation of the exhaust pipe 420, fluorescent color wheel 430, and motor 440, with a compact structure. After installation, the fluorescent color wheel 430, exhaust pipe 420, and motor 440 can rotate with the rotation of the first end cover 200 and can become an assembled module, which is convenient for installation and cooperation with the cylinder body 100.

[0028] Furthermore, the air suction hole 421 is located on the side wall of one end of the exhaust pipe 420 close to the fluorescent color wheel 430. This structural design can further limit the flow of air flow, enabling the cooled air flow to better pass through the fluorescent color wheel 430 and the motor 440 and finally converge at the exhaust pipe 420.

[0029] Furthermore, a plurality of heat dissipation columns 431 are fixedly arranged on the end face of the fluorescent color wheel 430 close to the exhaust pipe 420. The heat dissipation columns 431 are made of graphene. This structural design can increase the heat dissipation area of the fluorescent color wheel 430 and further accelerate heat dissipation and cooling.

[0030] Further, a plurality of support blocks 130 are fixedly provided on the inner wall of the open end of the clamping cavity 110, and the plurality of support blocks 130 are circumferentially arranged around the axis of the cylinder 100; this structural design can enhance the overall structural strength of the cylinder 100 and prevent the opening of the clamping cavity 110 from collapsing.

[0031] Further, a plurality of mounting fulcrums 270 are fixedly provided on the outer wall end face of the first end cover 200 for mounting the refrigeration box 500 and the blower 600.

[0032] Further, as Figure 7 shown, the refrigeration box 500 includes a box body 510 and refrigeration fins 520 fixedly installed on two opposite inner walls of the box body 510. A plurality of heat conduction fins 530 are provided between the two refrigeration fins 520, and both ends of the heat conduction fins 530 are in contact and abutted against the refrigerating surfaces of the refrigeration fins 520; the air flow entering the interior of the box body 510 is discharged from the air outlet after passing through the heat conduction fins 530; this structural design can improve the efficiency of heat exchange and accelerate the cooling of the air flow.

[0033] The present invention is described by way of preferred embodiments. Those skilled in the art will appreciate that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of the present invention. The present invention is not limited by the specific embodiments disclosed herein, and other embodiments falling within the scope of the claims of this application belong to the scope of protection of the present invention.

Claims

1. An assembled wavelength conversion device, characterized in that: it includes a cylinder body (100) with both ends open, a first end cover (200) and a second end cover (300) threadedly connected to both ends of the cylinder body (100). A closed space is formed between the first end cover (200), the second end cover (300) and the cylinder body (100), and the second end cover (300) is a transparent structure; a clamping cavity (110) is provided in the cylinder wall of the cylinder body (100). One end of the clamping cavity (110) away from the second end cover (300) extends to the end of the cylinder body (100) and is connected to the outside. A plurality of air outlet holes (120) are provided on the inner side wall of the cylinder body (100), and the air outlet holes (120) are communicated with the clamping cavity (110); a ring body (210) is fixedly provided in the first end cover (200). An annular channel (220) is formed between the outer wall of the ring body (210) and the inner side wall of the first end cover (200). When the first end cover (200) is matched with the cylinder body (100), the annular channel (220) is communicated with the clamping cavity (110); A discharge pipe (230) is communicated in the middle of the end face of the first end cover (200). The inner end of the discharge pipe (230) is communicated with an air extraction pipe (420) through a rotary joint (410). The other end of the air extraction pipe (420) is fixedly connected to the middle of a fluorescent color wheel (430). The fluorescent color wheel (430) is driven by a motor (440). An air suction hole (421) communicated with the inside of the air extraction pipe (420) is provided on the side wall of the air extraction pipe (420); An air inlet pipe (240) is provided on the outer end face of the first end cover (200), and the air inlet pipe (240) is communicated with the annular channel (220); A refrigeration box (500) and a fan (600) are installed on the outer end face of the first end cover (200). The air inlet of the fan (600) is communicated with the discharge pipe (230) through a first pipe (710), the air outlet of the fan (600) is communicated with the air inlet of the refrigeration box (500) through a second pipe (720), and the air outlet of the refrigeration box (500) is communicated with the air inlet pipe (240) through a third pipe (730); an installation plate (250) is fixedly provided on the inner end face of the first end cover (200). At least two bearing seats (260) are installed on one side of the installation plate (250) close to the discharge pipe (230). The air extraction pipe (420) passes through the two bearing seats (260); The motor (440) is installed on the installation plate (250). A first gear (441) is fixedly provided on the output shaft of the motor (440). A second gear (422) is fixedly provided on the outer wall of the air extraction pipe (420). The first gear (441) is meshed with the second gear (422) for transmission; the air suction hole (421) is located on the side wall of the air extraction pipe (420) close to the fluorescent color wheel (430).

2. The assembled wavelength conversion device according to claim 1, It is characterized in that: On the end face of the fluorescent color wheel (430) close to the exhaust pipe (420), a plurality of heat dissipation columns (431) are fixedly arranged, and the heat dissipation columns (431) are made of graphene.

3. An assembled wavelength conversion device according to claim 1, It is characterized in that: On the inner wall of the open end of the clamping cavity (110), a plurality of support blocks (130) are fixedly arranged, and the plurality of support blocks (130) are arranged in a circumferential array around the axis of the cylinder body (100).

4. An assembled wavelength conversion device according to claim 1, It is characterized in that: On the outer wall end face of the first end cover (200), a plurality of installation fulcrums (270) are fixedly arranged for installing the refrigeration box (500) and the fan (600).

5. An assembled wavelength conversion device according to claim 1, It is characterized in that: The refrigeration box (500) includes a box body (510) and refrigeration sheets (520) fixedly installed on two opposite inner walls of the box body (510). A plurality of heat conduction sheets (530) are arranged between the two refrigeration sheets (520), and two ends of the heat conduction sheets (530) are respectively in contact with and abutted against the refrigerating surfaces of the refrigeration sheets (520); the air flow entering the inside of the box body (510) passes through the heat conduction sheets (530) and then is discharged from the air outlet.

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