CN102172800A - Cooling system and method for laser processing equipment capable of simultaneously providing cold water and warm water - Google Patents
Cooling system and method for laser processing equipment capable of simultaneously providing cold water and warm water Download PDFInfo
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Abstract
The invention relates to a cooling system and method for laser processing equipment capable of simultaneously providing cold water and warm water, wherein a cold water pump pumps water from a water storage tank into a cold water outlet pipeline; one part of the cold water in the cold water outlet pipeline is bypassed into the water storage tank through a filtering device, and the other part of the cold water cools a device in the laser processing equipment, which needs cooling, then flows back into a water-cooling medium heat exchanger, and finally returns to the water storage tank. A cooling medium circulating system is controlled by a controller according to the water temperature detected by a cold water temperature sensor so that the water temperature in the water storage tank is adjusted by the cooling medium circulating system; a warm water pump pumps the cold water from the water storage tank into a warm water outlet pipeline, and the controller starts an electric heater according to the water temperature detected by a warm water temperature sensor so that the cold water in the warm water outlet pipeline is heated into warm water; and through a warm water outlet, the warm water in the warm water outlet pipeline enters a device of the laser processing equipment, which needs warm water cooling.
Description
Technical field
The present invention relates to cooling system, relate in particular to the laser process equipment cooling system.
Background technology
It is reported that in laser process equipment, laser oscillator is the device that converts electrical energy into luminous energy, is lasing capital equipment, is the core component of laser process equipment.But its efficient that is converted to luminous energy is not high, and most of electric energy transforms for heat energy, and this takes away unnecessary heat to guarantee the oscillator operate as normal with regard to needing cooling water.Before the present invention makes, conventional laser process equipment cooling unit is formed a cooling cycle system by compressor, condenser system, evaporimeter, refrigeration annex and connecting line, form a cover backwater outlet pipeline system by water pump, water storage box and water lines annex, this unit can only provide a kind of 10 ℃ ± cold water of 1 ℃ (design temperature is adjustable) to laser process equipment.When the cold water of this low temperature enters into laser process equipment, the heat that laser oscillator produces is pulled away and is cooled off; But, in laser process equipment all the time with 10 ℃ ± 3 ℃ cold water circulation time, when the air dew point temperature is higher than water temperature, in laser process equipment, as producing " condensation " phenomenon in the laser-gathering cavity." condensation " appearance can cause the damage of some parts, causes power output to descend even can not bright dipping.At this moment, if replace entering circulation cooling in the laser process equipment, will effectively avoid the generation of the problems referred to above with warm water near environment temperature.China CN200910041959.9 patent of invention provides a kind of dual-temperature industrial handpiece Water Chilling Units, its warm water system does not have heater, and is uncontrollable when leaving water temperature is low, needs the user side load that water temperature is raise, do not have the water quality treating apparatus simultaneously, can't be used for laser process equipment.Laser process equipment needs extremely meticulous maintenance as a kind of precision and expensive advanced equipments of high grade and precision.And this invention patent when can make unit from the initial cold water that lower temperature is provided all the time of start-up phase, can provide the warm water that approaches environment temperature again, can be used as the supporting cooling system of large laser process equipment.
Summary of the invention
The object of the present invention is to provide laser process equipment that cold water and warm water can be provided simultaneously with cooling system and method, by ingenious formation systemic circulation pipeline, the two kinds of cold water that can regulate temperature can be provided simultaneously, cost is lower, control is simple, but control is flexible and precision is higher, can satisfy the cooling requirement of large laser process equipment.
The laser process equipment cooling system that different temperatures cooling water (warm water and cold water) is provided of the present invention, be characterized in, comprise coolant circulating system, water circulation system and controller, coolant circulating system is by compressor, condenser, water-refrigerant heat exchanger and throttling arrangement connect and compose by connecting line, water circulation system comprises the cold water water pump that is arranged in the cold water outlet pipeline, warm water water pump and water storage box in the water outlet pipe road, water enters in the cold water outlet pipeline in the cold water water pump suction water storage box, cold water part in the cold water outlet pipeline is gone in the water storage box by bypass through filter, another part cold water enters into laser process equipment the device that laser process equipment needs to cool off is cooled off, and then get back in water-refrigerant heat exchanger by the cold-water return mouth, turn back at last in the water storage box; The cold water temperature sensor is set in the cold water outlet pipeline, and the unlatching of coolant circulating system is controlled so that the water temperature in the water storage box is regulated by the refrigerant system according to the detected water temperature of cold water temperature sensor by controller; Cold water in the warm water water pump suction water storage box enters into the water outlet pipe road, also be provided with the warm water temperature sensor in the water outlet pipe road, electric heater and controlled valve, controller comes opening electric heater according to the detected water temperature of warm water temperature sensor, so that cold water is heated to form warm water in the water outlet pipe road, warm water in the water outlet pipe road enters into the device that needs the warm water cooling of laser process equipment by the warm water outlet, and then turn back to the warm water water return outlet, make warm water enter warm water pump entrance place again, thereby set up a closed-loop water system, make the cold water in the water storage box can not enter into this closed-loop water system again; Controller is also controlled valve in the water outlet pipe reason to destroy this closed-loop water system according to the detected water temperature of warm water temperature sensor, and then make part warm water bypass to water storage box, make the cold water in the water storage box replenish this closed-loop water system again, described warm water is meant that temperature is higher than the cooling water of described cold water.
The described laser process equipment cooling system that the different temperatures cooling water can be provided simultaneously, its further characteristics are that described filter is an ion interchange unit.
The described laser process equipment cooling system that the different temperatures cooling water can be provided simultaneously, its further characteristics be, water storage box has only one, and cold water outlet pipeline and water outlet pipe road are inlet and outlet system independently separately, do not disturb mutually.
The described laser process equipment cooling system that the different temperatures cooling water can be provided simultaneously, its further characteristics are that compressor is any in rotator type, piston type, vortex, the screw compressor.
The described laser process equipment cooling system that the different temperatures cooling water can be provided simultaneously, its further characteristics are that throttling arrangement is any in capillary, orifice plate, electric expansion valve or the heating power expansion valve.
The described laser process equipment cooling system that the different temperatures cooling water can be provided simultaneously, its further characteristics be, water-refrigerant heat exchanger is any in bushing type, shell-tube type, the board-like or finned heat exchanger.
The described laser process equipment cooling system that the different temperatures cooling water can be provided simultaneously is characterized in that, condenser is any in bushing type, shell-tube type, the board-like or finned heat exchanger.
Of the present inventionly utilize described laser process equipment to provide the method for different temperatures cooling water (warm water and cold water), characteristics to be with cooling system, suppose that the cold water leaving water temperature is set at a ℃, the warm water leaving water temperature is b ℃, may further comprise the steps:
A, unlatching cold water water pump, cold water circulates in the systemic circulation pipeline, and the water in the water storage box is sucked and enters into the cold water outlet pipeline, and a part of cold water is gone in the water storage box by bypass through the plasma switch, cold water is filtered, thereby satisfies laser process equipment to requirements in water quality; Part cold water enters by the cold water outlet pipeline and needs in the laser process equipment in the cooling device, and laser process equipment cooling back cold water temperature is risen, and gets back in water-refrigerant heat exchanger after getting back to by the cold-water return mouth, and then returns in the water storage box;
B, when the cold water temperature sensor detects the cold water leaving water temperature greater than a+c ℃, controller is promptly opened the coolant circulating system operation, in water-refrigerant heat exchanger, cold water and refrigerant carry out exchange heat, water temperature descends, overheated gas with low-temp low-pressure behind the refrigerant suction water inlet side heat enters in the compressor, the cold media gas that becomes HTHP after overcompression enters in the condenser, in condenser, refrigerant and environmental air other cooling mediums such as (or) water exchange heat and being cooled off, subcooled liquid with high pressure enters throttling arrangement, enter in water-refrigerant heat exchanger through the gas-liquid mixture refrigerant that becomes low-temp low-pressure after the throttling step-down, carry out exchange heat with cold water, finish a kind of refrigeration cycle, by continuous kind of refrigeration cycle, water temperature descends, reach at a ℃～a+c ℃ when the cold water temperature sensor detects leaving water temperature, coolant circulating system keeps operation;
C, when leaving water temperature reaches a ℃, controller stops coolant circulating system operation; Reach a+c ℃ when leaving water temperature rises, coolant circulating system reruns;
D, when laser process equipment need provide b ℃ warm water, open the warm water water pump, cold water in the water storage box enters the water outlet pipe road, when the warm water temperature sensor detects water temperature and is lower than design temperature b ℃, the controller opening electric heater, cold water is heated, water temperature rises, water enters into the laser aid that needs the warm water cooling by the pipeline of warm water outlet, and then turns back to the warm water water return outlet, enters warm water pump entrance place, thereby form a closed-loop water system, cold water in the water storage box can not enter into closed-loop water system, and warm water is in this closed circulation system, by absorbing the heat in electric heater and the laser aid, water temperature constantly rises, when the leaving water temperature of warm water reached design temperature b ℃, controller cut out electric heater, and system provides to laser process equipment with leaving water temperature b ℃ warm water;
E, constantly absorb heat in the laser process equipment when b ℃ warm water, water temperature rises, when water temperature rises to b+d ℃, the energising of hot water bypass solenoid valve is opened, and part hot water bypass is to water storage box, and closed-loop water system is destroyed, cold water in the water storage box replenishes in the closed-loop water system, water temperature continue to descend, and when water temperature drops to more than b ℃ less than b+d ℃ of setting value, forms this closed-loop water system again;
F, when warm water circulation several times water temperature rises to b+d ℃ again, repeating step E;
Wherein a, b, c, d are temperature value.
Description of drawings
Fig. 1 is the block diagram of coolant circulating system.
Fig. 2 is the block diagram of water circulation system.
The specific embodiment
As depicted in figs. 1 and 2, suppose that the cold water leaving water temperature is set at a ℃, control range is ± 1 ℃, and the warm water leaving water temperature is b ℃, and control range is ± 1 ℃, and laser process equipment is realized two kinds of leaving water temperatures in the following manner with cooling system (abbreviation unit).
Before start at first with all manual valve-openings of unit, open cold water water pump 6 then, water in the water storage box 5 is sucked the pipeline that enters into cooling water outlet, part cold water is gone in the water storage box 5 by bypass through plasma switch 10, cold water is filtered, thereby satisfies laser process equipment to requirements in water quality; Part cold water enters by outlet pipeline and needs in the cooling device in the laser process equipment, laser process equipment cooling back cold water temperature is risen,, get back in the unit cold-water return mouth by the chilled water system inlet, get back to then in water-refrigerant heat exchanger 4, and then return in the water storage box 5.
When cold water temperature sensor 11 detects the cold water leaving water temperature greater than a+1 ℃, controller is promptly opened coolant circulating system or refrigeration system operation as shown in Figure 1, compressor 1 starts, embodiment illustrates with finned heat exchanger shown in the figure, when condenser adopts finned heat exchanger, must dispose axial fan simultaneously, axial flow blower carries out start and stop control according to unit high-voltage operation pressure or speed change is regulated control, and axial flow blower is opened operation by high-pressure control in the condenser system 2.In water-refrigerant heat exchanger 4, cold water and refrigerant carry out exchange heat, and water temperature descends, and the overheated gas with low-temp low-pressure behind the refrigerant suction water inlet side heat enters in the compressor 1, and the cold media gas that becomes HTHP after overcompression enters in the condenser system 2.In condenser system 2, refrigerant and environmental air exchange heat and cooled off, subcooled liquid with high pressure enters throttling expansion mechanism or throttling arrangement 3, enter in water-refrigerant heat exchanger 4 through the gas-liquid mixture refrigerant that becomes low-temp low-pressure after the throttling step-down, carry out exchange heat with cold water, finish a kind of refrigeration cycle.By continuous kind of refrigeration cycle, water temperature descends, and reaches at a ℃～a+1 ℃ when cold water temperature sensor 11 detects leaving water temperature, and refrigeration system keeps operation; When leaving water temperature reached a ℃, controller stopped the refrigeration system operation, and compressor 1 and condenser 2 are out of service, and coolant circulating system stops circulation; Reach a+1 ℃ when leaving water temperature rises, coolant circulating system reruns.
When laser process equipment needs unit that b ℃ warm water is provided, open warm water water pump 7, cold water in the water storage box 5 enters the warm water export pipeline, when warm water temperature sensor 12 detects water temperature and is lower than design temperature b-1 ℃, controller opening electric heater 8, cold water is heated, water temperature rises, water enters into the laser aid that needs the warm water cooling by the pipeline of warm water outlet, and then turn back to warm water water return outlet (warm water inlet), enter warm water water pump 7 porch, thereby form a closed-loop water system, cold water in the water storage box can not enter into closed-loop water system (warm water side circulation line), for example utilizes the closure of respective valve in the controller control piper.Warm water is in this closed circulation system, by absorbing the heat in electric heater 8 and the laser aid, water temperature constantly rises, when leaving water temperature reaches design temperature b ℃, controller cuts out electrical heating 8, and system provides to laser process equipment with leaving water temperature b ℃ warm water.
When b ℃ warm water constantly absorbs heat in the laser process equipment, water temperature rises, when water temperature rises to b+3 ℃ (can require to adjust according to laser process equipment), 9 energisings of hot water bypass solenoid valve are opened, and part hot water bypass is to 5 li of water storage boxes, and closed system is destroyed, cold water in the water storage box replenishes in the warm water side circulation line, water temperature continues to descend, and when water temperature dropped to b+1 ℃, hot water bypass solenoid valve 9 was closed.When warm water circulation several times water temperature rises to b+3 ℃ again, repeat this control and can reduce water temperature.
Claims (8)
1. the laser process equipment cooling system of cold water and warm water can be provided simultaneously, it is characterized in that, comprise coolant circulating system, water circulation system and controller.Coolant circulating system is connected and composed by connecting line by compressor, condenser, water-refrigerant heat exchanger and throttling arrangement; Water circulation system comprises the controlled valve that warm water water pump, electric heater and the bypass in the water storage box that is arranged in the cold water outlet pipeline and cold water water pump, the water outlet pipe road used.Water enters in the cold water outlet pipeline in the cold water water pump suction water storage box, cold water part in the cold water outlet pipeline is gone in the water storage box by bypass through filter, another part cold water enters into laser process equipment the device that laser process equipment needs to cool off is cooled off, and then get back in water-refrigerant heat exchanger by the cold-water return mouth, turn back at last in the water storage box; The cold water temperature sensor is set in the cold water outlet pipeline, and the unlatching of coolant circulating system is controlled so that the water temperature in the water storage box is regulated by coolant circulating system according to the detected water temperature of cold water temperature sensor by controller; Cold water in the warm water water pump suction water storage box enters into the water outlet pipe road, also be provided with the warm water temperature sensor in the water outlet pipe road, controller comes opening electric heater according to the detected water temperature of warm water temperature sensor, so that cold water is heated to form warm water in the water outlet pipe road, warm water in the water outlet pipe road enters into the device that needs the warm water cooling of laser process equipment by the warm water outlet, and then turn back to the warm water water return outlet, make warm water enter warm water pump entrance place again, thereby set up a closed-loop water system, make the cold water in the water storage box can not enter into this closed-loop water system again; Controller is also controlled valve in the water outlet pipe reason to destroy this closed-loop water system according to the detected water temperature of warm water temperature sensor, and then make part warm water bypass to water storage box, make the cold water in the water storage box replenish this closed-loop water system again, described warm water is meant that temperature is higher than the cooling water of described cold water.
2. the laser process equipment cooling system that cold water and warm water can be provided simultaneously as claimed in claim 1 is characterized in that described filter is an ion interchange unit.
3. the laser process equipment cooling system that cold water and warm water can be provided simultaneously as claimed in claim 1 is characterized in that water storage box has only one, and cold water outlet pipeline and water outlet pipe road are inlet and outlet system independently separately, do not disturb mutually.
4. the laser process equipment cooling system that cold water and warm water can be provided simultaneously as claimed in claim 1 is characterized in that compressor is any in rotator type, piston type, vortex, the screw compressor.
5. the laser process equipment cooling system that cold water and warm water can be provided simultaneously as claimed in claim 1 is characterized in that throttling arrangement is any in capillary, orifice plate, electric expansion valve or the heating power expansion valve.
6. the laser process equipment cooling system that cold water and warm water can be provided simultaneously as claimed in claim 1 is characterized in that water-refrigerant heat exchanger is any in bushing type, shell-tube type, the plate type heat exchanger.
7. the laser process equipment cooling system that cold water and warm water can be provided simultaneously as claimed in claim 1 is characterized in that, condenser is any in bushing type, shell-tube type, the board-like or finned heat exchanger.
8. one kind is utilized laser process equipment as claimed in claim 1 to provide the method for cold water and warm water with cooling system, it is characterized in that suppose that the cold water leaving water temperature is set at a ℃, the warm water leaving water temperature is b ℃, may further comprise the steps:
A, unlatching cold water water pump, cold water circulates in the systemic circulation pipeline, and the water in the water storage box is sucked and enters into the cold water outlet pipeline, and a part of cold water is gone in the water storage box by bypass through the plasma switch, cold water is filtered, thereby satisfies laser process equipment to requirements in water quality; Part cold water enters by the cold water outlet pipeline and needs in the laser process equipment in the cooling device, and laser process equipment cooling back cold water temperature is risen, and gets back in water-refrigerant heat exchanger after getting back to by the cold-water return mouth, and then returns in the water storage box;
B, when the cold water temperature sensor detects the cold water leaving water temperature greater than a+c ℃, controller is promptly opened the coolant circulating system operation, in water-refrigerant heat exchanger, cold water and refrigerant carry out exchange heat, water temperature descends, overheated gas with low-temp low-pressure behind the refrigerant suction water inlet side heat enters in the compressor, the cold media gas that becomes HTHP after overcompression enters in the condenser, in condenser, refrigerant and environmental air or water or other cooling medium exchange heat and cooled off, subcooled liquid with high pressure enters throttling arrangement, enter in water-refrigerant heat exchanger through the gas-liquid mixture refrigerant that becomes low-temp low-pressure after the throttling step-down, carry out exchange heat with cold water, finish a kind of refrigeration cycle, by continuous kind of refrigeration cycle, water temperature descends, reach at a ℃～a+c ℃ when the cold water temperature sensor detects leaving water temperature, coolant circulating system keeps operation;
C, when leaving water temperature reaches a ℃, controller stops coolant circulating system operation; Reach a+c ℃ when leaving water temperature rises, coolant circulating system reruns;
D, when laser process equipment need provide b ℃ warm water, open the warm water water pump, cold water in the water storage box enters the water outlet pipe road, when the warm water temperature sensor detects water temperature and is lower than design temperature b ℃, the controller opening electric heater, cold water is heated, water temperature rises, water enters into the laser aid that needs the warm water cooling by the pipeline of warm water outlet, and then turns back to the warm water water return outlet, enters warm water pump entrance place, thereby form a closed-loop water system, cold water in the water storage box can not enter into closed-loop water system, and warm water is in this closed circulation system, by absorbing the heat in electric heater and the laser aid, water temperature constantly rises, when the leaving water temperature of warm water reached design temperature b ℃, controller cut out electric heater, and system provides to laser process equipment with leaving water temperature b ℃ warm water;
E, constantly absorb heat in the laser process equipment when b ℃ warm water, water temperature rises, when water temperature rises to b+d ℃, the energising of hot water bypass solenoid valve is opened, and part hot water bypass is to water storage box, and closed-loop water system is destroyed, cold water in the water storage box replenishes in the closed-loop water system, water temperature continue to descend, and when water temperature drops to more than b ℃ less than b+d ℃ of setting value, forms this closed-loop water system again;
F, when warm water circulation several times water temperature rises to b+d ℃ again, repeating step E;
Wherein a, b, c, d are temperature value.
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