Dual-pump temperature control system with cold accumulation function for laser and control method thereofTechnical Field
The invention relates to the technical field of laser refrigeration temperature control, in particular to a double-pump temperature control system with a cold accumulation function for a laser and a control method thereof.
Background
Poor heat dissipation is one of the main causes of the laser temperature rise. The laser can produce a large amount of heat in the course of working, if can't distribute in time, will lead to the temperature to rise, influence the normal work of laser.
Therefore, a large amount of cold sources are provided in a short time to cool the laser, so that the normal operation of the laser is ensured. However, by providing instantaneous refrigeration capacity, the configuration of the refrigeration system is relatively large, and the volume and cost are relatively high, so that the refrigeration system cannot be truly applied to practical engineering.
Disclosure of Invention
This section is intended to outline some aspects of embodiments of the application and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section as well as in the description of the application and in the title of the application, which may not be used to limit the scope of the application.
Therefore, the invention aims to provide the double-pump temperature control system with the cold accumulation function for the laser and the control method thereof, the accumulated cold can directly take away the instant heat generated by the high-power equipment in a short time, and the system has the advantages of simple configuration, low cost and high control precision.
In order to solve the technical problems, according to one aspect of the present invention, the following technical solutions are provided:
a dual pump temperature control system with cold accumulation function for laser comprises:
The input end of the PID controller is connected with a parameter input module;
the cold accumulation/heat system comprises a cold accumulation package, a cold/heat exchange component for cooling the secondary refrigerant in the cold accumulation package to accumulate cold or heat the secondary refrigerant to accumulate heat, and an internal circulation pump for inputting the secondary refrigerant in the cold accumulation package into the cold/heat exchange component to perform cold/heat exchange;
The temperature control and adjustment system is used for carrying out liquid supply cooling or liquid supply heating on the target after being controlled and adjusted by the PID controller according to the target liquid supply parameters set by the parameter input module;
the liquid in the temperature control and regulation system and the secondary refrigerant in the cold accumulation bag perform cold/heat exchange in the cold accumulation/heat system, and then supply liquid for cooling or supply liquid for heating up the target.
As a preferable scheme of the dual-pump temperature control system with cold storage function for a laser of the invention, wherein the cold/heat exchange component comprises a compressor, a four-way valve with an inlet communicated with an outlet end of the compressor, a condenser with one end communicated with a first outlet end of the four-way valve, an electronic expansion valve with one end communicated with the other end of the condenser, a first evaporator and a second evaporator;
The first refrigerating medium communication port of the first evaporator is communicated with the outlet end of the internal circulating pump, the second refrigerating medium communication port of the first evaporator is communicated with the third refrigerating medium communication port of the second evaporator, the first refrigerating medium communication port of the first evaporator is communicated with the second outlet end of the four-way valve, and the second refrigerating medium port of the first evaporator is communicated with the other end of the electronic expansion valve;
the fourth secondary refrigerant communication port of the second evaporator is communicated with the secondary refrigerant inlet of the cold accumulation bag;
And the third outlet of the four-way valve is communicated with the inlet of the compressor through a pipeline.
As a preferable mode of the dual pump temperature control system with cold storage function for a laser according to the invention, the cold/heat exchange assembly further comprises a dry filter between the electronic expansion valve and the condenser.
As a preferable scheme of the dual-pump temperature control system with cold accumulation function for the laser, the temperature control and adjustment system comprises an external circulation pump, a flowmeter, a liquid supply pipeline and a liquid return pipeline, wherein the input end of the external circulation pump is communicated with an exchange liquid circulation outlet of a second evaporator, one end of the flowmeter is communicated with the output end of the external circulation pump, one end of the flowmeter is communicated with the other end of the flowmeter, the other end of the liquid supply pipeline is connected to a target liquid supply inlet, and one end of the liquid return pipeline is communicated with a target liquid return outlet, and the other end of the liquid return pipeline is communicated with the exchange liquid circulation inlet of the second evaporator;
Wherein, be connected with the solenoid valve between feed liquid pipeline and the return liquid pipeline.
As an optimal scheme of the double-pump temperature control system with the cold accumulation function for the laser, the invention is characterized in that a liquid supply temperature sensor is arranged on the liquid supply pipeline, and a liquid return temperature sensor is arranged on the liquid return pipeline;
the PID controller is electrically connected with the internal circulation pump, the external circulation pump, the flowmeter, the liquid supply temperature sensor and the liquid return temperature sensor respectively.
As an optimal scheme of the double-pump temperature control system with the cold accumulation function for the laser, the cold accumulation bag is provided with a cold accumulation bag temperature sensor which is electrically connected with a PID controller.
A control method of a double-pump temperature control system with a cold accumulation function for a laser comprises the following specific steps:
S1, a cold accumulation mode, namely starting an internal circulation pump to circulate, continuously conveying the secondary refrigerant in a cold accumulation bag into a first evaporator, starting a compressor, compressing the refrigerant by the compressor, changing the refrigerant into high-temperature and high-pressure gaseous refrigerant, enabling the gaseous refrigerant to enter a condenser to dissipate heat through a four-way valve, enabling the refrigerant to flow to an electronic expansion valve through a drying filter after heat dissipation, enabling the throttled refrigerant to exchange heat with the secondary refrigerant in the first evaporator, cooling the secondary refrigerant, enabling the cooled secondary refrigerant to return to the cold accumulation bag through a second evaporator, and enabling the refrigerant after heat absorption to return to the compressor to complete the cold accumulation cycle;
S2, a cooling mode, namely setting target liquid supply flow Q according to a parameter input module, outputting the frequency of an external circulating pump through calculation of a PID controller, guaranteeing the liquid supply flow, and according to the target liquid supply temperature T1 set by the parameter input module and the actual liquid supply temperature T3 acquired by a liquid supply temperature sensor, outputting the frequency of an internal circulating pump through calculation of the PID controller, continuously conveying the secondary refrigerant in a cold storage bag into a first evaporator at the moment, then enabling the secondary refrigerant to enter into a second evaporator to exchange with exchange liquid, continuously conveying the carried cold after exchange liquid exchanges with the secondary refrigerant through the external circulating pump, sequentially passing through a flowmeter and a liquid supply pipeline, cooling the target, then re-entering into the second evaporator through a liquid return pipeline, continuously exchanging heat with the secondary refrigerant, re-flowing back into the bag, and after the cooling mode is finished, raising the temperature of the cold storage bag, re-entering, wherein the initial opening percentage X1 of the internal circulating pump is input by the parameter input module, and the temperature T3 is equal to or less than or equal to the absolute value T1, namely, and the absolute temperature of the secondary cooling is equal to or less than or equal to 1;
S3, a heat supply mode: when heating is needed, an internal circulation pump is started, the refrigerating medium in the cold storage bag is continuously conveyed into the first evaporator, meanwhile, a compressor is started, a four-way valve is used for switching the internal flow direction, high-temperature and high-pressure refrigerating medium enters the first evaporator through reversing of the four-way valve and exchanges heat with the refrigerating medium, the circulating refrigerating medium is heated, after heat dissipation, the refrigerating medium enters an electronic expansion valve for throttling, the throttled refrigerating medium enters a condenser for absorbing heat, the refrigerant after absorbing heat returns to the compressor to complete heat supply circulation, meanwhile, a target liquid supply flow Q is set according to a parameter input module, the frequency of an external circulation pump is output, the liquid supply flow is guaranteed, the frequency of the internal circulation pump is output according to the target liquid supply temperature T1 set by the parameter input module and the liquid return temperature T2 collected by a liquid return temperature sensor through calculating of the PID controller, at the moment, the refrigerating medium carrying heat after the first evaporator exchanges heat with the refrigerating medium enters the second evaporator and exchanges heat with the exchanging liquid, the refrigerating medium carries heat and then carries out heat through the external circulation pump and the pipeline and returns to the refrigerating medium through the second evaporator and the heat-carrying medium in turn, and the refrigerating medium continuously flows back to the refrigerating medium after the refrigerating medium flows into the second evaporator and the refrigerating medium through the second evaporator and the heat-circulation flow again, and the refrigerating medium continuously flows into the refrigerating medium after the refrigerating medium and the refrigerating medium continuously flows through the refrigerating medium through the second circulation.
Compared with the prior art, the invention has the following beneficial effects:
1. Through cold accumulation, the cold energy can be stored under the condition of no cold energy demand, and the circulation efficiency is higher through plate change forced convection circulation. ;
2. By setting the opening of the initial internal circulation pump, a large amount of low-temperature cold sources and hot fluid can be instantaneously supplied for heat exchange, the liquid supply temperature is stabilized within the target deviation in a short time, and the cold energy loss caused by temperature overshoot is avoided;
3. the circulation quantity of the cold fluid is regulated by PID control regulation, so that the temperature of the liquid supply can be ensured to be stable within the deviation.
4. In the case of low temperature requiring heating, the heat source can be provided by switching the refrigerant circulation system and the refrigerant system, so that the efficiency is high compared with electric heating.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following detailed description of the embodiments of the present invention will be given with reference to the accompanying drawings, which are to be understood as merely some embodiments of the present invention, and from which other drawings can be obtained by those skilled in the art without inventive faculty. Wherein:
Fig. 1 is a schematic structural diagram of a dual pump temperature control system with cold accumulation function for a laser according to the present invention.
Detailed Description
In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to the appended drawings.
Next, the present invention will be described in detail with reference to the drawings, wherein the sectional view of the device structure is not partially enlarged to general scale for the convenience of description, and the drawings are only examples, which should not limit the scope of the present invention. In addition, the three-dimensional dimensions of length, width and depth should be included in actual fabrication.
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.
The invention provides a double-pump temperature control system with a cold accumulation function for a laser and a control method thereof, wherein the accumulated cold can directly take away the instantaneous heat generated during the operation of high-power equipment in a very short time, and the system has the advantages of simple configuration, low cost and high control precision.
Example 1
A dual pump temperature control system with cold accumulation function for laser comprises:
the input end of the PID controller 100 is connected with a parameter input module 110 for manually inputting initial parameter conditions.
The cold/heat system 200 includes a cold storage pack 210, a cold/heat exchange assembly for cooling a coolant in the cold storage pack 210 to cool or heat the coolant to store heat, and an internal circulation pump 220 for inputting the coolant in the cold storage pack 210 into the cold/heat exchange assembly to perform cold/heat exchange, and in this embodiment, the cold/heat exchange assembly includes a compressor 230, a four-way valve 240 having an inlet in communication with an outlet end of the compressor 230, a condenser 250 having one end in communication with a first outlet end of the four-way valve 240, an electronic expansion valve 260 having one end in communication with the other end of the condenser 250, a first evaporator 270, and a second evaporator 280, wherein a first coolant communication port 270a of the first evaporator 270 is in communication with an outlet end of the internal circulation pump 220, a second coolant communication port 270b of the first evaporator 270 is in communication with a third coolant communication port 280a of the second evaporator 280, the first refrigerant communication port 270c of the first evaporator 270 is communicated with the second outlet end of the four-way valve 240, the second refrigerant port 270d of the first evaporator 270 is communicated with the other end of the electronic expansion valve 260, the fourth refrigerant communication port 280b of the second evaporator 280 is communicated with the refrigerant inlet of the cold storage pack 210, the third outlet of the four-way valve 240 is communicated with the inlet of the compressor 230 through a pipeline, preferably, the cold/heat exchange assembly further comprises a drier-filter 290 positioned between the electronic expansion valve 260 and the condenser 250, in particular use, the internal circulation pump 220 is started to circulate, the refrigerant in the cold storage pack 210 is continuously conveyed into the first evaporator 270, meanwhile, the compressor 230 is started, the refrigerant is changed into high-temperature and high-pressure gaseous refrigerant after being compressed by the compressor 230, the refrigerant is cooled by the four-way valve 240 and enters the condenser 250, after heat dissipation, the heat is throttled by the drying filter 290 to the electronic expansion valve 260, the throttled refrigerant exchanges heat with the secondary refrigerant in the first evaporator 270, the secondary refrigerant is cooled, the cooled secondary refrigerant returns to the cold storage package 210 through the second evaporator 280 to store the cold, and the heat-absorbed refrigerant returns to the compressor 230 to complete the cold storage cycle, and preferably, the cold storage package 210 is provided with a cold storage package temperature sensor 210a electrically connected with the PID controller 100.
The temperature control and regulation system 300 is used for performing liquid supply cooling or liquid supply heating on a target according to the target liquid supply parameter set by the parameter input module 110 and is controlled and regulated by the PID controller 100, wherein the liquid in the temperature control and regulation system 300 and the coolant in the cold storage bag 210 perform liquid supply cooling or liquid supply heating on the target after the cold/heat exchange of the cold/heat system 200, specifically, the temperature control and regulation system 300 comprises an external circulation pump 310 with an input end communicated with an exchange liquid circulation outlet 280c of the second evaporator 280, a flowmeter 320 with one end communicated with an output end of the external circulation pump 310, a liquid supply pipeline 330 with one end communicated with the other end of the flowmeter 320, and a liquid return pipeline 340 with one end communicated with a target liquid return outlet and the other end communicated with an exchange liquid circulation inlet 280c of the second evaporator 280, the liquid supply pipeline 330 is provided with a liquid supply temperature sensor 330a, the liquid return pipeline 340 is provided with a liquid return temperature sensor 340a, wherein the PID controller 100 is respectively and electrically connected with the internal circulation pump 220, the external circulation pump 310, the flowmeter 320, the liquid supply temperature sensor 330a and the liquid return temperature sensor 340a, when the liquid supply pipeline 330 is particularly used, the exchange liquid is continuously conveyed by the external circulation pump 310 after being exchanged with the refrigerating medium, the exchange liquid is sequentially conveyed by the flowmeter 320 and the liquid supply pipeline 330 to cool/heat the target, then the temperature is reduced/heated, the exchange liquid is re-conveyed into the second evaporator 280 through the liquid return pipeline 350 to be continuously exchanged with the refrigerating medium, an electromagnetic valve 350 is connected between the liquid supply pipeline 330 and the liquid return pipeline 340, when the target is heated or cooled, the liquid flowing out through the liquid return pipeline 340 enters the liquid supply pipeline 330 through the electromagnetic valve 350 to be mixed with the liquid in the liquid supply pipeline 330, a more refined regulated feed line 330 supplies the target amount of cooling or heat.
Example 2
The invention also provides a control method of the double-pump temperature control system with the cold accumulation function for the laser, which comprises the following specific steps:
S1, a cold accumulation mode, in which an internal circulation pump 220 is started to circulate, the secondary refrigerant in a cold accumulation bag 210 is continuously conveyed into a first evaporator 270, meanwhile, a compressor 230 is started, the refrigerant is compressed by the compressor 230 and then becomes high-temperature and high-pressure gaseous refrigerant, the gaseous refrigerant enters a condenser 250 through a four-way valve 240 to dissipate heat, the heat is dissipated and then is throttled by an electronic expansion valve 260 through a drying filter 290, the throttled refrigerant exchanges heat with the secondary refrigerant in the first evaporator 270 to cool the secondary refrigerant, the cooled secondary refrigerant returns to the cold accumulation bag 210 through a second evaporator 280 to cool, and the refrigerant after heat absorption returns to the compressor 230 to complete the cold accumulation cycle;
S2, a cooling mode, namely setting a target liquid supply flow Q according to a parameter input module 110, outputting the frequency of an external circulation pump 310 through calculation of a PID controller 100, guaranteeing the liquid supply flow, continuously conveying the secondary refrigerant in a cold storage packet 210 into a first evaporator 270 at the moment, then exchanging the secondary refrigerant into a second evaporator 280, continuously conveying the secondary refrigerant after exchanging the secondary refrigerant with the exchange liquid, cooling and cooling the target after continuously conveying the cold carrying quantity through the external circulation pump 310 through a flowmeter 320 and a liquid supply pipeline 330, then re-entering the secondary refrigerant into a second evaporator 280 through a liquid return pipeline 340, continuously performing heat exchange with the secondary refrigerant, and re-refluxing the secondary refrigerant after exchanging the secondary refrigerant into the cold storage packet 210 through the liquid return pipeline 330, wherein the temperature of the cold storage packet 210 is continuously increased, the secondary refrigerant is re-entered into the cold storage packet (210), the initial temperature of the secondary refrigerant is equal to or less than or equal to the absolute value of the primary cooling pump (T1) is equal to or less than or equal to the absolute value of the PID 1, and the absolute value of the primary cooling temperature of the primary cooling pump (T1) is equal to or less than or equal to the absolute value of 1 is controlled by the PID 1, and the absolute value of the temperature of the primary cooling 1 is equal to the absolute value of the temperature 1;
And S3, in a heat supply mode, when heating and temperature rising are needed, the internal circulation pump 220 is started, the refrigerating medium in the cold storage bag 210 is continuously conveyed into the first evaporator 270, meanwhile, the compressor 230 is started, the four-way valve 240 is switched to flow in the internal direction, the high-temperature and high-pressure refrigerating medium enters the first evaporator 270 through the reversing of the four-way valve 240 to exchange heat with the refrigerating medium, the circulating refrigerating medium is heated, after the refrigerating medium dissipates heat, the electronic expansion valve 260 throttles, the throttled refrigerating medium enters the condenser 250 to absorb heat, the heat-absorbed refrigerating medium returns to the compressor 230 to complete heat supply circulation, meanwhile, the target fluid supply quantity Q is set according to the parameter input module 110, the frequency of the external circulation pump 310 is output, the fluid supply quantity is ensured, the target fluid supply temperature T1 set according to the parameter input module 110 and the fluid return temperature T2 collected by the fluid temperature sensor 350a are output, at this time, the frequency of the internal circulation pump 220 is output, after the refrigerating medium 280 which is subjected to heat exchange between the first evaporator 270 and the high-temperature is throttled, the refrigerating medium enters the second evaporator 280 to exchange heat with the refrigerating medium, the second evaporator 280 is subjected to heat exchange heat with the refrigerating medium, the refrigerating medium is subjected to heat exchange with the second fluid through the second fluid and the refrigerating medium flow meter and the refrigerating medium is continuously conveyed to the heat exchange fluid through the second fluid flow meter and the refrigerating medium through the second circulation pump 320 to the pipeline and the refrigerating medium to be continuously exchanged with the refrigerating medium after the refrigerating medium is subjected to heat exchange with the refrigerating medium through the refrigerating medium flow through the second fluid and the refrigerating medium flow circulation pipeline 320.
Although the invention has been described hereinabove with reference to embodiments, various modifications thereof may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the features of the disclosed embodiments may be combined with each other in any manner as long as there is no structural conflict, and the exhaustive description of these combinations is not given in this specification merely for the sake of omitting the descriptions and saving resources. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.