A double-valve temperature control system with a cold storage function for a laser and a control method thereof

Abstract

The application discloses a double-valve temperature control system with a cold storage function for a laser device and a control method thereof. The double-valve temperature control system with the cold storage function for the laser device comprises a PID controller, a cold storage system and a temperature control adjustment system. A parameter input module is connected to an input end of the PID controller. The cold storage system is provided with a cold storage package. The cold storage system is used for cooling and cold storage of a cold carrier in the cold storage package. The temperature control adjustment system is used for adjusting the cooling flow and the opening of the cold carrier in the cold storage package to the target according to a target liquid supply temperature T1 set by the parameter input module, a collected liquid return temperature T2, a heat exchange liquid supply temperature T3 and a target liquid supply flow Q, and the calculation of the PID controller. According to the application, the cold storage function can be used to store cold energy under the condition of no cold energy demand, the configuration of the refrigeration system is reduced, and the volume and cost of the whole device are reduced. Through the cold supply adjustment, the liquid supply temperature can be stabilized within the target deviation in a short time, and the cold energy loss caused by the temperature overshoot is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of laser refrigeration temperature control, in particular to a double-valve temperature control system with cold storage function for laser and a control method thereof. BACKGROUND

[0002] Poor heat dissipation is one of the main reasons for temperature rise of the laser, and a large amount of heat is generated during the operation of the laser, which will lead to temperature rise and affect the normal operation of the laser if it cannot be dissipated in time.

[0003] Therefore, a large amount of cold source is provided in a short time to cool the laser and ensure the normal operation of the laser. However, providing instantaneous refrigeration capacity will result in a large configuration of the refrigeration system, high volume and cost, and cannot be truly applied to actual engineering. SUMMARY

[0004] This section aims to summarize some aspects of the embodiments of the present application and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract and title of the specification to avoid obscuring the purpose of this section, abstract and title, and such simplifications or omissions cannot be used to limit the scope of the present application.

[0005] Therefore, the purpose of the present application is to provide a double-valve temperature control system with cold storage function for laser and a control method thereof, which can directly remove the instantaneous heat generated during the operation of high-power equipment in a short time, and has simple configuration, low cost and high control precision.

[0006] To solve the above technical problems, according to one aspect of the present application, the present application provides the following technical scheme:

[0007] A double-valve temperature control system with cold storage function for laser, comprising:

[0008] A PID controller having a parameter input module connected to its input end;

[0009] A cold storage system having a cold storage pack, the cold storage system being used to cool and store the cold storage pack;

[0010] A temperature control adjustment system for adjusting the cooling flow and opening of the cold storage pack according to the target liquid supply temperature T1 set by the parameter input module, the collected liquid return temperature T2, the heat exchange liquid supply temperature T3 and the target liquid supply flow Q, and the calculation of the PID controller.

[0011] As a preferred scheme of the double-valve temperature control system with cold accumulation function for a laser, the cold accumulation system further comprises an evaporator arranged in the cold accumulation package, a compressor with an inlet end communicated with an outlet end of the evaporator, a condenser with an inlet end communicated with an outlet end of the compressor, a drying filter with one end communicated with the other end of the drying filter and the other end communicated with the inlet of the evaporator.

[0012] As a preferred scheme of the double-valve temperature control system with cold accumulation function for a laser, the temperature control and adjustment system comprises a first adjustment valve with one end communicated with the outlet of the cold accumulation package, a circulating pump with an inlet communicated with the other end of the first adjustment valve, a flow meter with one end communicated with the output of the circulating pump, a liquid supply pipeline with one end communicated with the other end of the flow meter and the other end connected to the target liquid supply inlet, and a liquid return pipeline with one end communicated with the target liquid return outlet and the other end communicated with the inlet of the cold accumulation package.

[0013] As a preferred scheme of the double-valve temperature control system with cold accumulation function for a laser, the liquid supply pipeline is provided with a liquid supply temperature sensor, the liquid return pipeline is provided with a liquid return temperature sensor, and the pipeline between the first adjustment valve and the cold accumulation package is provided with a heat exchange liquid supply temperature sensor.

[0014] The pipeline between the first adjustment valve and the circulating pump is provided with an auxiliary pipeline communicated with the liquid return pipeline, and the auxiliary pipeline is provided with a second adjustment valve.

[0015] The PID controller outputs the initial cooling supply opening percentage X1 and X2 of the first adjustment valve and the second adjustment valve according to the target liquid supply temperature T1 set by the parameter input module, the collected liquid return temperature T2 and the heat exchange liquid supply temperature T3, and the calculation.

[0016] X1 = (T1-T2) / (T3-T2), X2 = 1-X1.

[0017] As a preferred scheme of the double-valve temperature control system with cold accumulation function for a laser, the PID controller is electrically connected to the first adjustment valve, the circulating pump, the flow meter, the liquid supply temperature sensor, the liquid return temperature sensor and the heat exchange liquid supply temperature sensor, respectively.

[0018] As a preferred scheme of the double-valve temperature control system with cold accumulation function for a laser, the temperature control and adjustment system further comprises an electric heater arranged between the circulating pump and the flow meter, and the PID controller is electrically connected to the electric heater.

[0019] A control method of a double-valve temperature control system with cold accumulation function for a laser, the specific steps are as follows:

[0020] S1, the cold storage mode: the first regulating valve opening 100%, the second regulating valve is closed, the circulating pump low frequency circulation, the compressor of the cold storage system is started, the refrigerant is cooled in the condenser, the electronic expansion valve is adjusted according to the superheat, the throttled refrigerant is cooled in the evaporator to cool the cold storage pack, and the cold storage is carried out;

[0021] S2, the cooling mode: according to the parameter input module, the target liquid supply flow Q is set, the frequency of the circulating pump is calculated through the PID controller, the liquid supply flow is guaranteed, the target liquid supply temperature T1 set by the parameter input module, the collected liquid return temperature T2 and the heat exchange liquid supply temperature T3 are calculated through the PID controller, and the initial cooling opening percentage X1 and X2 of the first regulating valve and the second regulating valve in the cooling mode are outputted, when the absolute value of the deviation of the actual liquid supply temperature T4 and the target liquid supply temperature T1, that is, |T4-T1|≤1, the PID autonomous adjustment mode is entered, and when the cooling mode is finished, the cold storage pack temperature rises, and the cold storage is re-entered;

[0022] S3, the heating mode: when heating is needed, the opening of the electric heater is calculated according to the target liquid supply temperature T1 set by the parameter input module.

[0023] Compared with the prior art, the application has the beneficial effects that:

[0024] 1. Through cold storage, cold energy can be stored in the absence of cold energy demand, the configuration of the refrigeration system is reduced, and the volume and cost of the entire device are reduced;

[0025] 2. Through cooling adjustment, the initial opening is given through calculation, a large amount of low-temperature cold source can be supplied instantaneously and mixed with hot fluid, the liquid supply temperature can be stabilized within the target deviation in a short time, and the loss of cold energy caused by temperature overshoot is avoided;

[0026] 3. Through PID control switching, the opening of the first regulating valve and the second regulating valve is adjusted, the proportion of cold and hot fluid is adjusted, and the liquid supply temperature is stabilized within the deviation;

[0027] 4. In the case of low temperature heating, the opening of the electric heater can be adjusted through PID, and stable heating mode temperature control can be provided. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical scheme of the embodiments of the application, the application will be described in detail below in combination with the drawings and detailed embodiments. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor. Among them:

[0029] Figure 1 Figure 1 is a schematic diagram of the overall structure of a double-valve temperature control system with a cold storage function for a laser according to the present application. DETAILED DESCRIPTION

[0030] In order to make the above objectives, features and advantages of the present application more apparent, specific embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0031] Secondly, the present application is described in detail in combination with the schematic diagram. In the detailed description of the embodiments of the present application, the cross-sectional view of the device structure will be partially enlarged without the general proportion for the convenience of description, and the schematic diagram is only an example which should not limit the scope of protection of the present application. In addition, the three-dimensional spatial dimensions including length, width and depth should be included in the actual manufacture.

[0032] In order to make the objectives, technical solutions and advantages of the present application more apparent, the embodiments of the present application will be described in further detail below in combination with the accompanying drawings.

[0033] The present application provides a double-valve temperature control system with a cold storage function for a laser and a control method thereof. The cold storage capacity can directly remove the instantaneous heat generated during the operation of high-power equipment in a very short time, and the configuration is simple, the cost is low, and the control precision is high.

[0034] Figure 1 Figure 1 is a schematic diagram of the overall structure of a double-valve temperature control system with a cold storage function for a laser according to the present application. Figure 1 The double-valve temperature control system with a cold storage function for a laser according to the present embodiment includes a PID controller 100, a cold storage system 200 and a temperature control adjustment system 300.

[0035] The PID controller 100 is electrically connected with a parameter input module 110 connected to the input end of the PID controller 100 for manual input of parameters, and is electrically connected with a first adjustment valve 310, a circulating pump 320, a flow meter 330, a liquid supply temperature sensor 340a, a liquid return temperature sensor 350a and a heat exchange liquid supply temperature sensor 360.

[0036] The cold storage system 200 has a cold storage pack 210, and is used for cooling and storing cold in the cold storage pack 210. Specifically, the cold storage system 200 further comprises an evaporator 220 arranged in the cold storage pack 210, a compressor 230 having an inlet end communicated with an outlet end of the evaporator 220, a condenser 240 having an inlet end communicated with an outlet end of the compressor 230, a drying filter 250 having one end communicated with an outlet end of the condenser 240, an electronic expansion valve 260 having one end communicated with another end of the drying filter 250 and another end communicated with an inlet of the evaporator 220. In specific use, the compressor 230 of the cold storage system 200 is turned on, the refrigerant is radiated in the condenser 240, the electronic expansion valve 260 is adjusted according to the superheat degree, and the throttled refrigerant is used to cool and store the cold storage pack 210.

[0037] The temperature control system 300 is used for adjusting the cooling flow and opening degree of the cold storage pack 210 according to the target liquid supply temperature T1 set by the parameter input module 110, the collected liquid return temperature T2, the heat exchange liquid supply temperature T3 and the target liquid supply flow Q, and the calculation of the PID controller 100. Specifically, the temperature control system 300 comprises a first regulating valve 310 having one end communicated with an outlet of the cold storage pack 210, a circulating pump 320 having an inlet communicated with another end of the first regulating valve 310, a flow meter 330 having one end communicated with an output of the circulating pump 320, a liquid supply pipeline 340 having one end communicated with another end of the flow meter 330 and another end connected to a target liquid supply inlet, and a liquid return pipeline 350 having one end communicated with a target liquid return outlet and another end communicated with an inlet of the cold storage pack 210.

[0038] The liquid supply pipeline 340 is provided with a liquid supply temperature sensor 340a, the liquid return pipeline 350 is provided with a liquid return temperature sensor 350a, and the pipeline between the first regulating valve 310 and the cold storage pack 210 has a heat exchange liquid supply temperature sensor 360.

[0039] The pipeline between the first regulating valve 310 and the circulating pump 320 is provided with an auxiliary pipeline H communicated with the liquid return pipeline 350, and the auxiliary pipeline H is provided with a second regulating valve 370.

[0040] The PID controller 100 outputs the initial cooling opening percentage X1 and X2 of the first regulating valve 310 and the second regulating valve 370 according to the target liquid supply temperature T1 set by the parameter input module 110, the collected liquid return temperature T2 and the heat exchange liquid supply temperature T3, and the calculation.

[0041] X1 = T1-T2 / T3-T2, X2 = 1-X1.

[0042] The temperature control system 300 further comprises an electric heater 380 arranged between the circulating pump 320 and the flow meter 330, and the PID controller 100 is electrically connected with the electric heater 380.

[0043] In combination Figure 1 The control method of the dual-valve temperature control system with cold storage function for the laser device according to the embodiment is as follows:

[0044] S1, cold storage mode: the first regulating valve 310 is fully opened, the second regulating valve 370 is closed, the circulating pump 320 is operated at a low frequency, the compressor 230 of the cold storage system 200 is turned on, the refrigerant is cooled in the condenser 240, the electronic expansion valve 260 is adjusted according to the superheat degree, and the throttled refrigerant is used to cool the cold storage medium in the cold storage pack 210 in the evaporator 220 to perform cold storage.

[0045] S2, cooling supply mode: the target liquid supply flow rate Q is set by the parameter input module 110, the frequency of the circulating pump 320 is calculated by the PID controller 100 to ensure the liquid supply flow rate, the target liquid supply temperature T1, the collected return liquid temperature T2 and the heat exchange liquid supply temperature T3 are set by the parameter input module 110, and the initial cooling supply opening percentage X1 and X2 of the first regulating valve 310 and the second regulating valve 370 are calculated by the PID controller 100, when the absolute value of the deviation between the actual liquid supply temperature T4 and the target liquid supply temperature T1, i.e., |T4-T1|≤1, the PID autonomous adjustment mode is entered, and when the cooling supply mode is ended, the temperature of the cold storage pack 210 rises and the cold storage is re-entered.

[0046] S3, heating mode: when heating is needed, the opening of the electric heater 380 is calculated by the PID controller 100 according to the target liquid supply temperature T1 set by the parameter input module 110.

[0047] Although the present application has been described with reference to the embodiments above, various improvements can be made thereto and equivalent replacements can be made to the components thereof without departing from the scope of the present application. In particular, each feature disclosed in the embodiments of the present application can be combined with any other feature disclosed in the embodiments of the present application, as long as there is no structural conflict. The combinations of the features are not exhaustively described in the present specification only for the purpose of saving space and resources. Therefore, the present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A double-valve temperature control system with a cold storage function for a laser, characterized by, The utility model relates to a temperature control system of cold storage system, including: PID controller (100) is connected with parameter input module (110) to the input end; Cold storage system (200) has cold storage pack (210), and the cold storage system (200) is used to cool the cold carrier in cold storage pack (210) and carries out cold storage; Temperature control system (300) is used for adjusting the cooling flow and opening of the cold carrier in cold storage pack (210) according to the target liquid supply temperature T1 set by parameter input module (110), the collected liquid return temperature T2, heat exchange liquid supply temperature T3 and target liquid supply flow Q and the calculation of PID controller (100); The temperature control system (300) includes first regulating valve (310) with one end communicating with the outlet of cold storage pack (210), circulating pump (320) with the inlet communicating with the other end of first regulating valve (310), flowmeter (330) with one end communicating with the output of circulating pump (320), liquid supply pipeline (340) with one end communicating with the other end of flowmeter (330) and the other end connected to the target liquid inlet and liquid return pipeline (350) with one end communicating with the target liquid return outlet and the other end communicating with the inlet of cold storage pack (210); The liquid supply pipeline (340) is provided with liquid supply temperature sensor (340a), the liquid return pipeline (350) is provided with liquid return temperature sensor (350a), and the pipeline between the first regulating valve (310) and the cold storage pack (210) has heat exchange liquid supply temperature sensor (360); The pipeline between the first regulating valve (310) and the circulating pump (320) is provided with auxiliary pipeline (H) communicating with the liquid return pipeline (350), and the auxiliary pipeline (H) is provided with second regulating valve (370); The PID controller (100) outputs the initial cooling opening percentage X1 and X2 of the first regulating valve (310) and the second regulating valve (370) according to the target liquid supply temperature T1 set by the parameter input module (110), the collected liquid return temperature T2 and the heat exchange liquid supply temperature T3 after calculation. Wherein, X1= (T1-T2) / (T3-T2), X2=1-X1.

2. The dual valve temperature control system with cold storage function for a laser according to claim 1, wherein The cold storage system (200) further includes an evaporator (220) arranged in the cold storage pack (210), a compressor (230) with an inlet end communicating with an outlet end of the evaporator (220), a condenser (240) with an inlet end communicating with an outlet end of the compressor (230), a drying filter (250) with one end communicating with the other end of the drying filter (250) and the other end communicating with the inlet of the evaporator (220).

3. The dual valve temperature control system with cold storage function for a laser as claimed in claim 1, wherein The PID controller (100) is electrically connected with the first regulating valve (310), the circulating pump (320), the flowmeter (330), the liquid supply temperature sensor (340a), the liquid return temperature sensor (350a) and the heat exchange liquid supply temperature sensor (360).

4. The dual valve temperature control system with cold storage function for a laser as claimed in claim 1, wherein The temperature control system (300) further comprises an electric heater (380) arranged between the circulating pump (320) and the flow meter (330), and the PID controller (100) is electrically connected with the electric heater (380).

5. A control method of a dual valve temperature control system with a cold accumulation function for a laser as claimed in any one of claims 1 to 4, characterized by, The specific steps are as follows: S1, cold storage mode: the first regulating valve (310) is opened by 100%, the second regulating valve (370) is closed, the circulating pump (320) is circulated at a low frequency, the compressor (230) of the cold storage system (200) is started, the refrigerant is cooled in the condenser (240), the electronic expansion valve (260) is adjusted according to the superheat degree, the throttled refrigerant is cooled in the evaporator (220) to cool the cold storage medium in the cold storage bag (210), and cold storage is performed; S2, cooling supply mode: according to the target liquid supply flow Q set by the parameter input module (110), the frequency of the circulating pump (320) is calculated by the PID controller (100) to ensure the liquid supply flow, according to the target liquid supply temperature T1 set by the parameter input module (110), the collected return liquid temperature T2 and the heat exchange liquid supply temperature T3, the initial cooling supply opening percentage X1 and X2 of the first regulating valve (310) and the second regulating valve (370) are calculated by the PID controller (100), when the absolute value of the deviation between the actual liquid supply temperature T4 and the target liquid supply temperature T1, that is, |T4-T1|≤1, the PID autonomous adjustment mode is entered, and when the cooling supply mode is ended, the temperature of the cold storage bag (210) rises, and the cold storage is re-entered; S3, heating mode: when heating is needed, according to the target liquid supply temperature T1 set by the parameter input module (110), the opening of the electric heater (380) is calculated by the PID controller (100).

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