WO2018121061A1 - Procédé et dispositif de commande d'un système de réfrigération à changement de phase au moyen d'une source de lumière à semi-conducteurs émettant de la lumière, et dispositif de projection - Google Patents

Procédé et dispositif de commande d'un système de réfrigération à changement de phase au moyen d'une source de lumière à semi-conducteurs émettant de la lumière, et dispositif de projection Download PDF

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Publication number
WO2018121061A1
WO2018121061A1 PCT/CN2017/109327 CN2017109327W WO2018121061A1 WO 2018121061 A1 WO2018121061 A1 WO 2018121061A1 CN 2017109327 W CN2017109327 W CN 2017109327W WO 2018121061 A1 WO2018121061 A1 WO 2018121061A1
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WIPO (PCT)
Prior art keywords
light source
refrigeration system
empirical formula
solid
heat consumption
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PCT/CN2017/109327
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English (en)
Chinese (zh)
Inventor
谭大治
胡飞
李屹
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深圳市光峰光电技术有限公司
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Publication of WO2018121061A1 publication Critical patent/WO2018121061A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/51—Cooling arrangements using condensation or evaporation of a fluid, e.g. heat pipes
    • F21V29/52—Cooling arrangements using condensation or evaporation of a fluid, e.g. heat pipes electrically powered, e.g. refrigeration systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • F25B49/022—Compressor control arrangements
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/16—Cooling; Preventing overheating
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L23/00—Details of semiconductor or other solid state devices
    • H01L23/34—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements
    • H01L23/42—Fillings or auxiliary members in containers or encapsulations selected or arranged to facilitate heating or cooling
    • H01L23/427—Cooling by change of state, e.g. use of heat pipes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/02—Constructional details
    • H01S3/04—Arrangements for thermal management
    • H01S3/042—Arrangements for thermal management for solid state lasers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S5/00—Semiconductor lasers
    • H01S5/02—Structural details or components not essential to laser action
    • H01S5/024—Arrangements for thermal management
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Definitions

  • the present invention relates to the field of control technologies, and in particular, to a solid-state illumination source phase change refrigeration system control method
  • the lifetime and reliability of a laser source in a solid-state light source is directly related to the operating temperature of the laser. The higher the temperature, the faster the laser output power is attenuated and the less reliable.
  • the phase-change refrigeration system uses the heat absorption of the refrigerant phase change process. And the exotherm completes the refrigeration cycle, which cools the evaporator temperature at which the laser is mounted to below ambient temperature.
  • a phase change refrigeration system in which a laser module is directly cooled by an evaporator is used to detect a temperature of a temperature measurement point set on an evaporator or a laser module, and a PID (Proportion-I) is applied according to a temperature change of the temperature measurement point.
  • PID Proportion-I
  • the control method adjusts the system cooling capacity to keep the temperature of the temperature measurement point at the set value. This method is simple in control and wide in applicability. However, the thermal load of the concentrated heat source of the laser module, especially the temperature change response of the high-power concentrated heat load, is not sensitive enough.
  • the temperature control point The temperature fluctuates greatly before stabilization. This temperature fluctuation is caused by the aforementioned control method gradually adjusting the cooling capacity according to the temperature change of the temperature control point, and the heat load of the heat source is abrupt, and the cooling capacity and the heat load are before the temperature is stable. Mismatches result in large temperature fluctuations that adversely affect the reliability of the laser.
  • the main object of the present invention is to provide a solid-state light source phase change refrigeration system control method, device and projection device, through the relationship between the light source heat consumption and the parameters of the refrigeration system to quickly adjust the refrigeration system, and then to the refrigeration The system performs fine adjustment to solve the problem of the cooling capacity of the refrigeration system caused by the sudden change of the heat consumption of the light source, and ensures the stability of the temperature control of the light source.
  • a control method for a solid-state light source phase change refrigeration system provided by the present invention includes:
  • the refrigeration system is finely adjusted by a closed loop control method.
  • the method further includes: determining whether the magnitude of the heat consumption change of the light source is greater than or equal to a preset threshold; if yes, according to the first The empirical formula calculates the parameters of the refrigeration system. If not, the refrigeration system is finely adjusted by a closed-loop control method.
  • the heat consumption of the light source is calculated by a source current, and the parameter of the refrigeration system is a compressor speed
  • the first empirical formula between obtaining the heat consumption of the light source and the parameters of the refrigeration system is specifically: obtaining a second empirical formula between the current of the light source and the rotational speed of the compressor.
  • the determining whether the heat consumption change direction of the light source is greater than or equal to a preset threshold; if yes, calculating the cooling system parameter according to the first empirical formula is:
  • the method further includes:
  • the closed loop control method includes: a PID control method, a fuzzy control, a predictive control, and a robust control.
  • a solid state light source phase change refrigeration system control apparatus including:
  • a formula acquisition module configured to obtain a first empirical formula between a heat consumption of the light source and a parameter of the refrigeration system
  • a calculation module configured to calculate the refrigeration according to the first empirical formula when the solid state light source is operated System parameters
  • a quick adjustment module configured to quickly adjust the refrigeration system by using the refrigeration system parameters
  • a fine adjustment module is configured to finely adjust the refrigeration system by a closed loop control method after a quick adjustment of the refrigeration system or when the magnitude of the heat loss of the light source is less than a preset threshold.
  • the method further includes:
  • the determining module is configured to determine whether the magnitude of the heat loss change of the light source is greater than or equal to a preset threshold; if yes, the calculating module calculates the cooling system parameter according to the first empirical formula.
  • the heat consumption of the light source is calculated by a light source current
  • the refrigeration system parameter is a compressor speed
  • the formula obtaining module comprises: a second formula acquiring unit, configured to obtain a light source current and a compressor speed The second empirical formula between.
  • the determining module includes:
  • a light source heat loss obtaining unit configured to pre-acquire the light source heat consumption data corresponding to the work of the solid-state light source
  • a current average obtaining unit configured to calculate the preset interval according to the heat consumption data of the light source Average value of the source current
  • a current determining unit configured to determine whether a variation amplitude of the average value of the light source current is greater than or equal to a preset current change amplitude threshold
  • calculation module is further configured to:
  • the fast adjustment module is specifically:
  • the cooling system is rapidly adjusted by the compressor rotation speed at the initial engraving of the preset inter-segment;
  • the fine adjustment module is specifically:
  • the refrigeration system is finely adjusted by a PID control method.
  • a projection apparatus comprising the above-described solid-state light source phase change refrigeration system control apparatus.
  • the present invention provides a solid-state light source phase change refrigeration system control method, apparatus and projection apparatus, the method comprising: obtaining a first empirical formula between the heat consumption of the light source and the parameters of the refrigeration system; Source working, calculating a refrigeration system parameter according to the first empirical formula; rapidly adjusting the refrigeration system by the refrigeration system parameter; finely adjusting the refrigeration system by a closed loop control method, and the invention uses the heat consumption of the light source
  • the relationship between the parameters of the refrigeration system is quickly adjusted to the refrigeration system, and then the refrigeration system is finely adjusted to solve the problem of the cooling capacity of the refrigeration system caused by the sudden change of the heat consumption of the light source, and the stability of the temperature control of the light source is ensured.
  • FIG. 1 is a flow chart of a method for controlling a phase change refrigeration system of a solid state light source according to a first embodiment of the present invention.
  • FIG. 2 is a flow chart of a method for controlling a phase change refrigeration system of a solid state light source according to a second embodiment of the present invention.
  • FIG. 3 is a schematic diagram of a function of a solid-state light-emitting source phase change refrigeration system according to a second embodiment of the present invention.
  • FIG. 4 is a second solid-state light source phase change refrigeration system control method according to Embodiment 2 of the present invention.
  • FIG. 5 is a diagram showing an example of a solid-state illuminating light source current change with a turn-to-turn relationship according to a second embodiment of the present invention
  • FIG. 6 is a schematic diagram of a solid-state illuminating light source phase change refrigeration system according to a third embodiment of the present invention
  • An exemplary structural block diagram of the device
  • FIG. 7 is a block diagram showing an exemplary structure of a control device for a phase change refrigeration system of a solid state light source according to Embodiment 4 of the present invention.
  • FIG. 8 is a block diagram showing an exemplary structure of a control device for a phase change refrigeration system of a solid state light source according to a fourth embodiment of the present invention.
  • a solid-state light source phase change refrigeration system control method includes
  • the refrigeration system is rapidly adjusted by the relationship between the heat consumption of the light source and the parameters of the refrigeration system, and then the refrigeration system is finely adjusted to solve the refrigeration system refrigeration caused by the sudden change of the heat consumption of the light source.
  • the problem of lag ensures the stability of the temperature control of the light source.
  • the solid-state light-emitting source includes a laser and a light-emitting diode, and the control method of the phase-change refrigeration system of the solid-state light source is described in detail below by taking a laser light source as an example.
  • a laser refrigeration system using phase change refrigeration includes: a laser light source 1, a compressor 2, a condenser 3, a throttling device 4, and a laser light source 1, and compression
  • the connecting line 5 between the machine 2, the condenser 3, and the throttle device 4 is connected to each other.
  • the laser source comprises at least one laser assembly 11, 12, each laser assembly comprising a laser module 112 and a water cooled plate 111.
  • the laser module is fixedly mounted on the cold plate, and the mounting interface should be filled with a material with high thermal conductivity (such as thermal grease, graphite sheet, etc.) to reduce the contact thermal resistance.
  • the refrigerant flows through the cold plate flow path and undergoes a phase change endotherm, taking away the heat generated by the laser.
  • the refrigerant shown in FIG. 3 flows through the laser light source 1 and is heated and vaporized. After passing through the compressor 2, it becomes a high-pressure superheated steam, which is liquefied by the condenser 3 to become a high-pressure liquid, and then throttled by the throttling device 4, and the pressure is increased. Reduce to low temperature and low pressure wet steam and re-enter light source 1.
  • the cold plate included in the light source system is used as the evaporator of the phase change cooling system, and the refrigerant flows through the cold plate only to undergo phase change endotherm, and the temperature is substantially constant, so that the temperature of each cold plate in the light source can be kept substantially the same.
  • the refrigeration system adjusts the cooling capacity of the system according to the temperature fed back by the temperature measuring point 113 through a PID control method or other closed-loop control method to keep the temperature of the temperature measuring point stable.
  • the PID controller gradually adjusts the cooling capacity according to the temperature of the read temperature control point, resulting in the cooling capacity.
  • the change lags behind the change of the heat load, the temperature of the temperature control point is stable and long, and there is a large fluctuation before the stabilization, which has an adverse effect on the reliability of the laser.
  • the light source control program adjusts the current of the laser light source, which is one of the heat consumption parameters of the light source, according to the required brightness, as the control device that performs the above control method according to the adjusted laser light.
  • the first empirical formula between the source current and the parameters of the refrigeration system the refrigeration system is quickly adjusted by the parameters of the refrigeration system, and the refrigeration system is finely adjusted by the closed-loop control method, thereby overcoming the change of the thermal load of the laser module.
  • the temperature control point brought by the large change is stable and long-lasting, and has a large fluctuation before the temperature is stabilized, which ensures the reliability of the laser.
  • a solid state light source phase change refrigeration system control method includes
  • step S20 when the solid-state light source is working, determine whether the heat source change amplitude is greater than or equal to a preset threshold; if yes, proceed to step S30, and if not, proceed to step S50;
  • S50 Perform fine adjustment on the refrigeration system by a closed loop control method.
  • the refrigeration system is rapidly adjusted by the relationship between the heat consumption of the light source and the parameters of the refrigeration system, and then the refrigeration system is finely adjusted to solve the refrigeration system refrigeration caused by the sudden change of the heat consumption of the light source.
  • the problem of lag ensures the stability of the temperature control of the light source.
  • the solid-state light-emitting source includes a laser and a light-emitting diode.
  • the laser light source is taken as an example to describe the control method of the solid-state light source phase change refrigeration system.
  • a laser refrigeration system using phase change refrigeration includes: a laser light source 1, a compressor 2, a condenser 3, a throttling device 4, and a laser light source 1, and compression
  • the connecting line 5 between the machine 2, the condenser 3, and the throttle device 4 is connected to each other.
  • the laser source comprises at least one laser component 11, 12, each
  • the laser assembly includes a laser module 112 and a water cooled plate 111.
  • the laser module is fixedly mounted on the cold plate, and the mounting interface should be filled with a material with high thermal conductivity (such as thermal grease, graphite sheet, etc.) to reduce the contact thermal resistance.
  • the refrigerant flows through the cold plate flow path to undergo phase change endotherm, taking away the heat generated by the laser.
  • the refrigerant shown in FIG. 3 flows through the laser light source 1 and is heated and vaporized. After passing through the compressor 2, it becomes a high-pressure superheated steam, which is liquefied by the condenser 3 to become a high-pressure liquid, and then throttled by the throttling device 4, and the pressure is increased. Reduce to low temperature and low pressure wet steam and re-enter light source 1.
  • the cold plate included in the light source system is used as the evaporator of the phase change cooling system.
  • the refrigerant flows through the cold plate only to undergo phase change endotherm, and the temperature is basically unchanged, so that the temperature of each cold plate in the light source can be kept substantially the same.
  • the cold plate or laser module in Fig. 3 is provided with a temperature measuring point 113.
  • the cooling system adjusts the cooling capacity of the system according to the temperature fed back by the temperature measuring point 113 through a PID control method or other closed loop control method to keep the temperature of the temperature measuring point stable.
  • the PID controller gradually adjusts the cooling capacity according to the temperature of the read temperature control point, resulting in the cooling capacity.
  • the change lags behind the change of the heat load, the temperature of the temperature control point is stable and long, and there is a large fluctuation before the stabilization, which has an adverse effect on the reliability of the laser.
  • the heat consumption of the light source is calculated by a laser current
  • the parameter of the refrigeration system is a compressor speed
  • the first empirical formula between the heat consumption of the light source and the parameters of the refrigeration system is specifically: A second empirical formula between the laser current and the compressor speed is obtained, and the variation of the heat consumption of the light source can be calculated by the heat consumption of the light source.
  • the heat consumption of the light source may also be related to voltage and junction temperature
  • the refrigeration system parameters may also be related to the speed of the condenser fan. These parameters may also represent the heat consumption of the light source and the parameters of the refrigeration system. Participate in the calculation.
  • the laser refrigeration system in FIG. 3 adds a temperature measurement point 6 of an ambient temperature, and sets the ambient temperature Ta, the heat consumption of the laser module! 5 .
  • the fan speed of the refrigeration system condenser and the throttle device parameters remain unchanged, and the system cooling capacity is regulated by the speed RS of the compressor.
  • the relationship between the required speed RS of the compressor and the ambient temperature Ta and the heat consumption P of the laser module can be obtained in order to control the temperature of the laser module to TO:
  • Equation 1 Equation 1
  • the refrigeration system control program calls the PID program to adjust the temperature of the temperature control point.
  • the light source control program adjusts the laser current I ⁇ according to the desired brightness
  • the current value is fed back to the refrigeration system control program.
  • the refrigeration system control program receives the current value change, it will pause the PID program, directly calculate and set the required compressor speed according to the second empirical formula, and then restart the PID program to finely adjust the temperature of the temperature control point.
  • the heat consumption of the laser module is small, and the PID control program can quickly adapt to a small change of the heat load and maintain the temperature of the temperature control point.
  • the compressor speed is reset every time the current I changes. That is, when the heat consumption of the light source changes by less than the preset threshold, the process proceeds to step S50, and the refrigeration system is finely adjusted by the closed loop control method.
  • the preset threshold is a user-defined change amplitude value, for example, the preset threshold is 10%, and when the heat consumption of the light source changes by 10% or more, the step is entered. S30, if no, proceed to step S50.
  • the laser light source is generally used for the projector to work, the output brightness of the light source needs to be adjusted with the projection screen, and the adjustment range is large, and after the projection image is known in advance, the image of the projector can be used.
  • the processing program analyzes the projection content in advance, divides the working time of the laser light source into a predetermined number of inter-turn segments, determines the projection brightness required for different engravings, obtains the heat consumption data of the light source, and feeds back to the light source control program.
  • the light source control program calculates the average value of the laser current in each preset interval according to the heat consumption data of the light source. Therefore, as shown in FIG. 4, taking a certain preset interval as an example, the laser light source changes.
  • the refrigeration system control method is specifically:
  • the method further includes:
  • the closed loop control method includes: a PID control method, a fuzzy control, a predictive control, and a robust control.
  • tl -t 4 four preset inter-segments can be irregularly divided according to the current size, try to make the division point of the inter-turn segment in the current jump engraving, in order to facilitate the stable operation of the refrigeration system.
  • the image processing program analyzes the projection content in advance, and can determine that the current variation in a certain period is small, and mark the inter-turn as one In the inter-turn section, the compressor speed in this inter-turn section is set by the average current value, and the length of each inter-turn section is not required to be consistent.
  • the preset inter-segment can satisfy the following conditions:
  • the inter-segment is divided: the target is to make adjacent
  • the mean current of the interval is the largest, for example, t ⁇ four inter-segments are divided.
  • the average currents of the four inter-turns are represented as II, 12, 13, and 14, respectively.
  • a solid state light source phase change refrigeration system control device includes
  • the formula acquisition module 1 is configured to obtain a first empirical formula between the heat consumption of the light source and the parameters of the refrigeration system;
  • the calculation module 2 is configured to: when the solid-state illumination source operates, calculate according to the first empirical formula Obtaining refrigeration system parameters;
  • a quick adjustment module 3 configured to quickly adjust a refrigeration system by using the refrigeration system parameters
  • Fine adjustment module 4 for after the rapid adjustment of the refrigeration system or when the heat consumption of the light source changes Less than a preset threshold ⁇ , the refrigeration system is finely adjusted by a closed loop control method.
  • the refrigeration system is rapidly adjusted by the relationship between the heat consumption of the light source and the parameters of the refrigeration system, and then the refrigeration system is finely adjusted to solve the lag of the refrigeration system caused by the sudden change in the heat consumption of the light source.
  • the problem is to ensure the stability of the temperature control of the light source.
  • the solid-state light-emitting source includes a laser and a diode, and the method for controlling the phase-change refrigeration system of the solid-state light source is described in detail below by taking a laser source as an example.
  • a laser refrigeration system using phase change refrigeration includes: a laser light source 1, a compressor 2, a condenser 3, a throttling device 4, and a laser light source 1, and compression
  • the connecting line 5 between the machine 2, the condenser 3, and the throttle device 4 is connected to each other.
  • the laser source comprises at least one laser assembly 11, 12, each laser assembly being comprised of a laser module 112 and a water cooled plate 111.
  • the laser module is fixedly mounted on a cold plate, and the mounting interface should be filled with a material with high thermal conductivity (such as thermal grease, graphite sheet, etc.) to reduce contact thermal resistance.
  • the refrigerant flows through the cold plate flow path to undergo phase change endotherm, taking away the heat generated by the laser.
  • the refrigerant shown in FIG. 3 flows through the laser light source 1 and is heated and vaporized. After passing through the compressor 2, it becomes a high-pressure superheated steam, which is liquefied by the condenser 3 to become a high-pressure liquid, and then throttled by the throttling device 4, and the pressure is increased. Reduce to low temperature and low pressure wet steam and re-enter light source 1.
  • the cold plate included in the light source system is used as the evaporator of the phase change cooling system.
  • the refrigerant flows through the cold plate only to undergo phase change endotherm, and the temperature is basically unchanged, so that the temperature of each cold plate in the light source can be kept substantially the same.
  • the cold plate or laser module in Fig. 3 is provided with a temperature measuring point 113, and the refrigeration system adjusts the cooling capacity of the system according to the temperature feedback of 113 by the PID control method or other closed loop control method to keep the temperature of the temperature measuring point stable.
  • the PID controller gradually adjusts the cooling capacity according to the temperature of the read temperature control point, resulting in the cooling capacity.
  • the change lags behind the change of the heat load, the temperature of the temperature control point is stable and long, and there is a large fluctuation before the stabilization, which has an adverse effect on the reliability of the laser.
  • the light source control program adjusts the current of the laser light source as one of the heat consumption parameters of the light source according to the required brightness, and the formula of the control device of the phase change refrigeration system of the solid state light source is obtained.
  • the module obtains the first empirical formula between the current of the laser light source and the parameters of the refrigeration system, and firstly uses the rapid adjustment module to quickly adjust the refrigeration system through the parameters of the refrigeration system, and then finely adjusts the refrigeration system through the closed-loop control method by using the fine adjustment module. Adjust, so that you can overcome The thermal load of the optical module changes, especially when the temperature is constant, and the temperature of the temperature control point is long, and the fluctuation of the temperature before the temperature is stable, which ensures the reliability of the laser.
  • a solid-state light source phase change refrigeration system control device includes
  • the formula obtaining module 10 is configured to obtain a first empirical formula between the heat consumption of the light source and the parameters of the refrigeration system; [0118] the determining module 20 is configured to determine whether the heat consumption of the light source is greater than the magnitude of the heat consumption of the solid state light source Equal to a preset threshold;
  • the calculating module 30 is configured to calculate a cooling system parameter according to the first empirical formula when a heat consumption of the light source is greater than or equal to a preset threshold value;
  • a quick adjustment module 40 configured to quickly adjust the refrigeration system by using the refrigeration system parameters
  • the fine adjustment module 50 is configured to finely adjust the refrigeration system by a closed loop control method after the quick adjustment of the refrigeration system or when the magnitude of the heat loss of the light source is less than a preset threshold.
  • the refrigeration system is quickly adjusted by the relationship between the heat consumption of the light source and the parameters of the refrigeration system, and then the refrigeration system is finely adjusted to solve the lag of the refrigeration system caused by the sudden change in heat consumption of the light source.
  • the problem is to ensure the stability of the temperature control of the light source.
  • the solid-state light-emitting source includes a laser and a diode, and the method for controlling the phase-change refrigeration system of the solid-state light source is described in detail below by taking a laser source as an example.
  • a laser refrigeration system using phase change refrigeration includes: a laser light source 1, a compressor 2, a condenser 3, a throttling device 4, and a laser light source 1, and compression
  • the connecting line 5 between the machine 2, the condenser 3, and the throttle device 4 is connected to each other.
  • the laser source comprises at least one laser assembly 11, 12, each laser assembly being comprised of a laser module 112 and a water cooled plate 111.
  • the laser module is fixedly mounted on a cold plate, and the mounting interface should be filled with a material with high thermal conductivity (such as thermal grease, graphite sheet, etc.) to reduce contact thermal resistance.
  • the refrigerant flows through the cold plate flow path to undergo phase change endotherm, taking away the heat generated by the laser.
  • the refrigerant shown in FIG. 3 flows through the laser light source 1 and is heated and vaporized. After passing through the compressor 2, it becomes a high-pressure superheated steam, which is liquefied by the condenser 3 to become a high-pressure liquid, and then throttled by the throttling device 4, and the pressure is increased. Reduce to low temperature and low pressure wet steam and re-enter light source 1.
  • the cold plate included in the light source system is used as a phase change cooling system In the evaporator, the refrigerant flows through the cold plate only to undergo phase change endotherm, and the temperature is substantially constant, so that the temperature of each cold plate in the light source can be kept substantially the same.
  • the cold plate or laser module in FIG. 3 is arranged with a temperature measuring point 113.
  • the refrigeration system adjusts the cooling capacity of the system according to the temperature feedback of 113 by the PID control method or other closed-loop control method to keep the temperature of the temperature measuring point stable.
  • the PID controller gradually adjusts the cooling capacity according to the temperature of the read temperature control point, resulting in the cooling capacity.
  • the change lags behind the change of the heat load, the temperature of the temperature control point is stable and long, and there is a large fluctuation before the stabilization, which has an adverse effect on the reliability of the laser.
  • the heat consumption of the light source is calculated by a laser current
  • the parameter of the refrigeration system is a compressor speed
  • the first empirical formula between the heat consumption of the light source and the parameters of the refrigeration system is specifically: A second empirical formula between the laser current and the compressor speed is obtained.
  • the heat consumption of the light source may also be related to voltage and junction temperature
  • the refrigeration system parameters may also be related to the speed of the condenser fan. These parameters may also represent the heat consumption of the light source and the parameters of the refrigeration system. Participate in the calculation.
  • the laser refrigeration system in FIG. 3 adds a temperature measurement point 6 of an ambient temperature, and sets the ambient temperature Ta, the heat consumption of the laser module! 5 .
  • the fan speed of the refrigeration system condenser and the throttle device parameters remain unchanged, and the system cooling capacity is regulated by the speed RS of the compressor.
  • the relationship between the required speed RS of the compressor and the ambient temperature Ta and the heat consumption P of the laser module can be obtained in order to control the temperature of the laser module to TO:
  • Equation 1 can also be expressed as:
  • the refrigeration system control program calls the PID program to adjust the temperature of the temperature control point.
  • the light source control program adjusts the laser current I ⁇ according to the desired brightness
  • the current value is fed back to the refrigeration system control program.
  • the refrigeration system control program receives the current value change, it will pause the PID program, directly calculate and set the required compressor speed according to the second empirical formula, and then Restart the PID program to fine-tune the temperature of the temperature control point.
  • the PID control program can quickly adapt to small changes in the thermal load and keep the temperature at the temperature control point stable. There is no need for the current I to reset the compressor speed every time. That is, when the heat consumption of the light source is less than a preset threshold, the process proceeds to step S50, and the refrigeration system is finely adjusted by a closed loop control method.
  • the laser light source is generally used for the operation of the projector, and the output brightness of the light source needs to be adjusted with the projection screen, and the adjustment range is large.
  • the image of the projector can be used.
  • the processing program analyzes the projection content in advance, divides the working time of the laser light source into a predetermined number of inter-turn segments, determines the projection brightness required for different engravings, obtains the heat consumption data of the light source, and feeds back to the light source control program.
  • the light source control program calculates the average value of the laser current in each preset interval based on the heat loss data of the light source.
  • the determining module 20 includes
  • the light source heat loss obtaining unit 21 is configured to pre-acquire the light source heat consumption data corresponding to the work of the solid state light source
  • the current average value obtaining unit 22 is configured to calculate an average value of the laser current in the preset inter-turn interval according to the heat consumption data of the light source;
  • the current determining unit 23 is configured to determine whether a variation amplitude of the average value of the laser current is greater than or equal to a preset current variation amplitude threshold;
  • calculation module is further configured to:
  • the compressor speed is calculated according to the second empirical formula.
  • the fast adjustment module is specifically:
  • the fine adjustment module is specifically:
  • the refrigeration system is finely adjusted by a PID control method.
  • the closed loop control method includes: a PID control method, a fuzzy control, a predictive control, and a robust control.
  • FIG. 5 is an exemplary diagram of a current of a laser light source undergoing a certain projection picture as a function of time.
  • the four preset inter-segments can be irregularly divided according to the current magnitude, so as to make the division point of the inter-turn segment in the current jump engraving, so as to facilitate the stable operation of the refrigeration system.
  • the image processing program analyzes the projection content in advance, and can determine that the current variation in a certain period is small, and the period is marked as one In the inter-segment section, the compressor speed in the inter-segment section is set by the average current value, and the length of each inter-turn section is not required to be uniform.
  • a projection device includes a solid-state light source phase change refrigeration system control device according to the third embodiment or the fourth embodiment, in addition to the conventional function module of the projection device, The relationship between the consumption and the parameters of the refrigeration system is quickly adjusted, and then the refrigeration system is finely adjusted to solve the problem of the cooling capacity of the refrigeration system caused by the sudden change of the heat consumption of the light source, and the stability of the temperature control of the light source is ensured. , improving the user experience of the projection device.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Thermal Sciences (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Mechanical Engineering (AREA)
  • Optics & Photonics (AREA)
  • Plasma & Fusion (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)
  • Semiconductor Lasers (AREA)

Abstract

L'invention concerne un procédé et un dispositif de commande d'un système de réfrigération à changement de phase au moyen d'une source de lumière à semi-conducteurs émettant de la lumière, et un dispositif de projection, qui se rapportent au domaine technique de la commande. Le procédé consiste : à acquérir une première formule empirique entre la perte de chaleur d'une source de lumière et un paramètre de système de réfrigération (S1) ; lorsqu'une source de lumière à semi-conducteurs émettant de la lumière fonctionne, à effectuer un calcul selon la première formule empirique pour obtenir le paramètre de système de réfrigération (S2) ; à régler rapidement le système de réfrigération par l'intermédiaire du paramètre de système de réfrigération (S3) ; et à régler finement le système de réfrigération par l'intermédiaire d'un procédé de commande en boucle fermée (S4). En effectuant un réglage rapide sur un système de réfrigération par l'intermédiaire d'une relation entre la perte de chaleur d'une source de lumière et un paramètre de système de réfrigération, puis en effectuant un réglage fin sur le système de réfrigération, le problème de l'hystérésis de capacité de réfrigération du système de réfrigération, provoqué par un changement brusque de la perte de chaleur de la source de lumière, est résolu, et la stabilité de la régulation de température de la source de lumière est garantie.
PCT/CN2017/109327 2016-12-30 2017-11-03 Procédé et dispositif de commande d'un système de réfrigération à changement de phase au moyen d'une source de lumière à semi-conducteurs émettant de la lumière, et dispositif de projection WO2018121061A1 (fr)

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