Intelligent fluorescent wheel heat dissipation system

Abstract

The utility model discloses an intelligent fluorescent wheel heat dissipation system which comprises a fluorescent wheel assembly and a heat dissipation shell, the fluorescent wheel assembly comprises a fluorescent wheel and a driving motor, an active heat dissipation device is arranged in the heat dissipation shell, a light source assembly and an infrared temperature measurement probe are arranged on the same side of the fluorescent wheel, and the infrared temperature measurement probe is aligned to a position A on the fluorescent wheel. The incident light of the light source assembly is aligned with the position B on the fluorescent wheel, the radial distances from the position A and the position B to the rotation center of the fluorescent wheel are the same, and the infrared temperature measurement probe, the active heat dissipation device and the light source assembly are electrically connected to the same control system; the control system regulates and controls the heat dissipation power of the active heat dissipation device and the illumination intensity of the light source assembly through a PID algorithm based on the temperature detected by the infrared temperature measurement probe so as to maintain the fluorescent wheel to operate within a preset temperature range. The fluorescent wheel temperature measuring device has the advantages of being capable of accurately and sensitively measuring the surface temperature of the fluorescent wheel and effectively controlling the temperature of the fluorescent wheel.

Description

TECHNICAL FIELD

[0001] The utility model relates to laser projector technical field especially relates to an intelligent fluorescent wheel heat dissipation system. BACKGROUND

[0002] In the laser projector, the fluorescent wheel as an important laser wavelength conversion element, its performance directly influences the color performance and service life of the projector. However, the fluorescent wheel needs to bear more heat in the working process. The excessively high temperature can cause the fluorescent powder efficiency of the fluorescent wheel to decline, even burn out, thereby causing the failure of the whole projector.

[0003] Specifically, the fluorescent wheel is usually coated with a layer of fluorescent powder on the surface of the metal disc. When the blue laser irradiates on the fluorescent powder, different waveband light can be excited. At present, the blue light excitation mainly produces yellow light and green light. Since the projector needs three primary colors (red, green and blue), the red light needs to be intercepted from the yellow light. In the process of converting the blue light into yellow light, a large amount of heat will be generated on the surface of the fluorescent wheel, which needs to be dissipated in time, and the temperature of the surface of the fluorescent wheel needs to be accurately controlled to ensure its normal work.

[0004] Among them, accurately detecting the temperature of the fluorescent wheel is the key step to realize efficient heat dissipation and temperature control. At present, the traditional temperature measurement method is to use a temperature probe to be attached and installed on the rotating shaft of the fluorescent wheel. However, the fluorescent wheel rotates at high speed, and a high-temperature annular belt will be formed at the light spot position of the fluorescent powder area, that is, the heat is concentrated on the annular belt. Since the temperature probe is installed on the rotating shaft, it cannot directly measure the temperature of the high-temperature annular belt, so this contact type temperature measurement method is not accurate and sensitive enough, and cannot reflect the real temperature distribution on the surface of the fluorescent wheel in time.

[0005] Therefore, it is necessary to further improve and perfect the prior art to overcome these shortcomings, and the utility model is made based on this situation. UTILITY MODEL CONTENT

[0006] The utility model aims at overcoming the shortcomings of the prior art, and provides an intelligent fluorescent wheel heat dissipation system which can accurately and sensitively measure the surface temperature of the fluorescent wheel and effectively control the temperature of the fluorescent wheel.

[0007] The utility model is realized through the following technical solutions:

[0008] To solve the above technical problems, the utility model provides a kind of intelligent fluorescent wheel heat dissipation system, including fluorescent wheel component and the heat dissipation shell covering fluorescent wheel component, the fluorescent wheel component includes fluorescent wheel and the drive motor of driving its rotation, the heat dissipation shell is equipped with active heat dissipation device, the same side of the fluorescent wheel is equipped with light source component and the infrared temperature measurement probe for temperature measurement, the infrared temperature measurement probe measures the local temperature of fluorescent wheel by non-contact mode, the infrared temperature measurement probe is aimed at position A on fluorescent wheel, the light of light source component incidence is aimed at position B on fluorescent wheel, the radial distance of position A and position B to fluorescent wheel rotation center is same and is R, the infrared temperature measurement probe, active heat dissipation device and light source component are electrically connected on the same control system;The control system is based on the temperature detected by infrared temperature measurement probe, adjusts the heat dissipation power of active heat dissipation device and the illumination intensity of light source component by PID algorithm, to maintain fluorescent wheel in the preset temperature range operation.

[0009] In order to further solve the technical problems to be solved by the utility model, in the intelligent fluorescent wheel heat dissipation system provided by the utility model, the active heat dissipation device includes heat collecting fins in the inner cavity of the heat dissipation shell, heat dissipation fins on the outer wall of the heat dissipation shell, and heat exchange pipelines connected between the two.

[0010] In order to further solve the technical problems to be solved by the utility model, in the intelligent fluorescent wheel heat dissipation system provided by the utility model, the heat exchange pipeline includes copper pipes or aluminum pipes and cooling liquid inside.

[0011] In order to further solve the technical problems to be solved by the utility model, in the intelligent fluorescent wheel heat dissipation system provided by the utility model, the wavelength of light converted by the fluorescent wheel is not more than 700 nm.

[0012] In order to further solve the technical problems to be solved by the utility model, in the intelligent fluorescent wheel heat dissipation system provided by the utility model, the light source component includes laser light source and lens assembly.

[0013] Compared with the prior art, the utility model has the following advantages:

[0014] The intelligent fluorescent wheel heat dissipation system adopts non-contact infrared temperature measurement technology to accurately monitor the temperature of the heat concentration ring of the high-speed rotating fluorescent wheel, and combines with the intelligent control system to adjust the operating state of the heat dissipation device and the light source component in real time, realizes accurate control of the temperature of the fluorescent wheel, effectively avoids the error and hysteresis caused by the traditional contact temperature measurement method, significantly improves the heat dissipation efficiency and temperature control accuracy, and thus ensures the stable operation of the projector and prolongs its service life. BRIEF DESCRIPTION OF DRAWINGS

[0015] The utility model discloses a sectional view schematic diagram as shown in the figure, and the specific implementation mode of the utility model will be further explained in detail below, wherein:

[0016] Fig. 1 The utility model discloses a sectional view schematic diagram as shown in the figure, and the specific implementation mode of the utility model will be further explained in detail below, wherein:

[0017] Fig. 2 The utility model discloses a sectional view schematic diagram as shown in the figure, and the specific implementation mode of the utility model will be further explained in detail below, wherein: Specific implementation mode

[0018] In order to make the technical personnel of the prior art better understand the technical scheme of the utility model, the utility model will be further explained in detail below with the drawings and specific implementation mode. It should be understood that the specific embodiment described here is only used to explain the utility model, and is not used to limit the utility model.

[0019] As Figs. 1-2 The utility model discloses a kind of intelligent fluorescent wheel heat dissipation systems, including fluorescent wheel component 1 and cover fluorescent wheel component 1's heat dissipation shell 2. The inner cavity of heat dissipation shell 2 is preferably closed cavity, to reduce the influence of external environment to fluorescent wheel component 1, improve heat dissipation efficiency.

[0020] The fluorescent wheel component 1 includes fluorescent wheel 11 (discoid) and the driving motor 12 of the rotation of it is driven.

[0021] The heat dissipation shell 2 is equipped with active heat dissipation device 3, the same side of the fluorescent wheel 11 is equipped with light source component 4 and the infrared temperature measurement probe 5 for temperature measurement. The infrared temperature measurement probe 5 measures the local temperature of fluorescent wheel 11 by non-contact mode. In working process, fluorescent wheel 11 is high-speed rotation, and a high-temperature annular zone is formed at the position of fluorescent powder area light spot. Infrared temperature measurement probe 5 is aligned with high-temperature annular zone, utilizes infrared imaging principle, and the infrared radiation of high-temperature annular zone is converted into electrical signal, and then converted into temperature value, to realize the purpose of non-contact temperature measurement to the working area of fluorescent wheel 11.

[0022] As Fig. 1 As shown in the figure, the infrared temperature measurement probe 5 is aligned with position A on fluorescent wheel 11, and the light of light source component 4 is aligned with position B (that is, high-temperature annular zone) on fluorescent wheel 11. The radial distance of position A and position B to the rotation center of fluorescent wheel 11 is same and is R. Position A and position B are different, which can avoid the light of infrared temperature measurement probe 5 and light source component 4 from interfering with each other, to ensure the accuracy of temperature measurement.

[0023] The infrared temperature measurement probe 5, the active heat dissipation device 3 and the light source assembly 4 are electrically connected to the same control system. The control system controls the heat dissipation power of the active heat dissipation device 3 and the light intensity of the light source assembly 4 based on the temperature detected by the infrared temperature measurement probe 5, so as to maintain the operation of the fluorescent wheel 11 within the preset temperature range, thereby ensuring the stable operation of the projector.

[0024] Further, the active heat dissipation device 3 includes heat collecting fins 31 located in the inner cavity of the heat dissipation shell 2, heat dissipation fins 32 located on the outer wall of the heat dissipation shell 2, and heat exchange pipelines 33 connected between the heat collecting fins 31 and the heat dissipation fins 32. The heat dissipation fins 32 are provided with a heat dissipation fan 34, and the heat dissipation fan 34 is electrically connected to the control system. The specific structure of the heat collecting fins 31 and the heat dissipation fins 32 can be a multi-layer plate structure to increase the heat dissipation area.

[0025] Further, the heat exchange pipelines 33 include copper pipes or aluminum pipes and cooling liquid located in the pipes. The specific shape of the heat exchange pipelines 33 can be a serpentine pipe to increase the heat exchange area.

[0026] Further, the wavelength of the light converted by the fluorescent wheel 11 is not more than 700 nm, and the energy is very low, so as to avoid significant influence on the measurement accuracy of the infrared temperature measurement probe 5. This is because the light wavelength below 700 nm does not overlap with the working wavelength range of the infrared temperature measurement probe 5, so as not to interfere with each other, that is, the wavelength of the infrared temperature sensor (i.e. the infrared temperature measurement probe 5) avoids the light emitting wavelength of the fluorescent wheel, and the signal-to-noise ratio is improved.

[0027] Further, the light source assembly 4 includes a laser light source 41 and a lens assembly 42 (convex lens, concave lens or lens array). Of course, as shown in the complete projector light path, in addition to the laser light source 41 and the lens assembly 42, a dichroic sheet, a light guide pipe, a light machine imaging system and the like are also included, and these components are all prior art, which will not be described here. Fig. 2

[0028] Working principle: in work, the driving motor 12 drives the fluorescent wheel 11 to rotate at high speed, and the blue light emitted by the laser light source 41 is focused on the fluorescent wheel 11 through the lens assembly 42 to excite the fluorescent powder to generate yellow light, but a high temperature ring will be generated. The infrared temperature measurement probe 5 monitors the temperature of the high temperature ring of the fluorescent wheel 11 in real time, and transmits the temperature data to the control system. The control system adjusts the rotating speed of the heat dissipation fan 34 and the power of the laser light source 41 according to the temperature data, so as to maintain the operation of the fluorescent wheel 11 within the preset temperature range. The heat exchange pipelines 33 transfer the heat collected by the heat collecting fins 31 to the heat dissipation fins 32, and the heat is dissipated to the air through the heat dissipation fan 34.

[0029] ​Through the above embodiment description, it can be seen that the utility model can realize accurate temperature measurement and effective heat dissipation of the fluorescent wheel 11, thereby ensuring stable operation of the projector.

Claims

1. A smart fluorescent wheel heat dissipation system, characterized in that: The device includes a fluorescent wheel assembly (1) and a heat dissipation housing (2) covering the fluorescent wheel assembly (1). The fluorescent wheel assembly (1) includes a fluorescent wheel (11) and a drive motor (12) for driving its rotation. An active heat dissipation device (3) is provided inside the heat dissipation housing (2). A light source assembly (4) and an infrared temperature probe (5) for temperature measurement are provided on the same side of the fluorescent wheel (11). The infrared temperature probe (5) measures the local temperature of the fluorescent wheel (11) in a non-contact manner. The infrared temperature probe (5) is aligned with a position on the fluorescent wheel (11). A. The light incident from the light source component (4) is aligned with position B on the fluorescent wheel (11). The radial distances from position A and position B to the rotation center of the fluorescent wheel (11) are the same and are both R. The infrared temperature probe (5), the active heat dissipation device (3) and the light source component (4) are electrically connected to the same control system. Based on the temperature detected by the infrared temperature probe (5), the control system uses a PID algorithm to regulate the heat dissipation power of the active heat dissipation device (3) and the light intensity of the light source component (4) to maintain the fluorescent wheel (11) within the preset temperature range.

2. The intelligent fluorescent wheel heat dissipation system according to claim 1, characterized in that: The active heat dissipation device (3) includes heat collection fins (31) located in the inner cavity of the heat dissipation shell (2), heat dissipation fins (32) located on the outer wall of the heat dissipation shell (2), and heat exchange pipes (33) connecting the two. The heat dissipation fins (32) are provided with a cooling fan (34), and the cooling fan (34) is electrically connected to the control system.

3. The intelligent fluorescent wheel heat dissipation system according to claim 2, characterized in that: The heat exchange pipeline (33) includes copper or aluminum tubes and coolant located inside them.

4. The intelligent fluorescent wheel heat dissipation system according to claim 1, characterized in that: The wavelength of light converted by the fluorescent wheel (11) does not exceed 700 nm.

5. The intelligent fluorescent wheel heat dissipation system according to claim 1, characterized in that: The light source assembly (4) includes a laser light source (41) and a lens assembly (42).

Images