WO2022014450A1 - チラー - Google Patents
チラー Download PDFInfo
- Publication number
- WO2022014450A1 WO2022014450A1 PCT/JP2021/025707 JP2021025707W WO2022014450A1 WO 2022014450 A1 WO2022014450 A1 WO 2022014450A1 JP 2021025707 W JP2021025707 W JP 2021025707W WO 2022014450 A1 WO2022014450 A1 WO 2022014450A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- coolant
- refrigerant
- heat exchanger
- temperature
- line
- Prior art date
Links
- 239000002826 coolant Substances 0.000 claims abstract description 245
- 238000005057 refrigeration Methods 0.000 claims abstract description 20
- 239000003507 refrigerant Substances 0.000 claims description 190
- 238000001914 filtration Methods 0.000 claims description 19
- 239000000110 cooling liquid Substances 0.000 claims description 13
- 239000007788 liquid Substances 0.000 claims description 10
- 239000003990 capacitor Substances 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 2
- 238000001816 cooling Methods 0.000 abstract description 17
- 230000007423 decrease Effects 0.000 description 12
- 239000000126 substance Substances 0.000 description 9
- 230000001276 controlling effect Effects 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000007654 immersion Methods 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
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- 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
- F25B6/00—Compression machines, plants or systems, with several condenser circuits
- F25B6/02—Compression machines, plants or systems, with several condenser circuits arranged in parallel
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/70—Auxiliary operations or equipment
- B23K26/702—Auxiliary equipment
- B23K26/703—Cooling arrangements
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- 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
- F25B25/00—Machines, plants or systems, using a combination of modes of operation covered by two or more of the groups F25B1/00 - F25B23/00
- F25B25/005—Machines, plants or systems, using a combination of modes of operation covered by two or more of the groups F25B1/00 - F25B23/00 using primary and secondary systems
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- 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
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
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- 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
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
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- 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
- F25B2339/00—Details of evaporators; Details of condensers
- F25B2339/04—Details of condensers
- F25B2339/047—Water-cooled condensers
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- 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
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/04—Refrigeration circuit bypassing means
- F25B2400/0403—Refrigeration circuit bypassing means for the condenser
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- 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
- F25B2600/00—Control issues
- F25B2600/02—Compressor control
- F25B2600/025—Compressor control by controlling speed
- F25B2600/0253—Compressor control by controlling speed with variable speed
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- 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
- F25B2600/00—Control issues
- F25B2600/11—Fan speed control
- F25B2600/111—Fan speed control of condenser fans
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- 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
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
- F25B2600/2501—Bypass valves
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- 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
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/19—Pressures
- F25B2700/193—Pressures of the compressor
- F25B2700/1933—Suction pressures
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- 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
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
- F25B2700/2115—Temperatures of a compressor or the drive means therefor
- F25B2700/21151—Temperatures of a compressor or the drive means therefor at the suction side of the compressor
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- 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
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
- F25B2700/2115—Temperatures of a compressor or the drive means therefor
- F25B2700/21152—Temperatures of a compressor or the drive means therefor at the discharge side of the compressor
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- 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
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
- F25B2700/2116—Temperatures of a condenser
- F25B2700/21163—Temperatures of a condenser of the refrigerant at the outlet of the condenser
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- 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
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/385—Dispositions with two or more expansion means arranged in parallel on a refrigerant line leading to the same evaporator
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- 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
Definitions
- the present invention relates to a chiller that keeps the temperature of the load constant by supplying a temperature-controlled coolant to the load, and more particularly, to a chiller that can keep the temperature of a plurality of loads constant. Is.
- a chiller that keeps the temperature of the plurality of loads constant by supplying the temperature-adjusted coolant to the plurality of loads is known as disclosed in Patent Document 1-Patent Document 3 and the like.
- the chiller (first chiller) disclosed in Patent Document 1 includes one refrigeration circuit, two coolant circuits that separately supply coolant to two loads, and two coolant circuits and a refrigeration circuit. It has two heat exchangers that are connected individually, one heat exchanger regulates the temperature of the coolant in one coolant circuit, and the other heat exchanger regulates the temperature of the coolant in the other coolant circuit. Is to adjust.
- This first chiller adjusts the temperature of the coolant in the two coolant circuits separately by the two heat exchangers, so it can handle two loads with different temperatures.
- this first chiller is costly because the two coolant circuits each have their own tank and pump, and the two coolant circuits and the refrigeration circuit are housed in one casing. In that case, there was a problem that the chiller became large.
- the chillers (second and third chillers) disclosed in Patent Documents 2 and 3 have one tank, one pump, and a plurality of coolant circuits, and one pump.
- the coolant discharged from is distributed and supplied to a plurality of coolant circuits, and this coolant circuit is configured to cool a plurality of loads by using one tank and one pump. Therefore, it can be made smaller than the first chiller.
- the second and third chillers distribute and supply the cooling liquid whose temperature is adjusted by one heat exchanger to a plurality of cooling liquid circuits, they can handle a plurality of loads having different temperatures. Can't.
- the technical object of the present invention is to provide a chiller having a rational structure, which is smaller in size than a conventional chiller, is cost-effective and energy-saving, and can handle a plurality of loads having different temperatures. It is in.
- the chiller of the present invention has one tank for accommodating the coolant, one pump for discharging the coolant in the tank, and a plurality of chillers by dividing the coolant discharged by the pump. It has a plurality of coolant circuits that are individually supplied to the load and a refrigeration circuit that adjusts the temperature of the coolant by heat exchange between the coolant and the refrigerant.
- the plurality of coolant circuits are interconnected via individual heat exchangers whose heat exchange capacity can be individually controlled, and the plurality of coolant circuits have a first coolant circuit for cooling the first load and a temperature different from that of the first load.
- the first heat exchanger which has a second coolant circuit for cooling the second load and connects the first coolant circuit and the refrigeration circuit, returns from the first load and the second load to the tank.
- the second heat exchanger that adjusts the temperature of the coolant and connects the second coolant circuit and the refrigeration circuit is characterized in that the temperature of the coolant supplied from the tank to the second load is adjusted. do.
- the first coolant circuit has a first supply pipeline that sends the coolant discharged from the pump to the first load at the first set temperature, which is the temperature in the tank, and the first load. It has a first return line for returning the coolant from the tank to the tank, and the first heat exchanger is connected to the first return line, whereby the first return line is cooled.
- the liquid flows into the tank after being adjusted to the first set temperature by the first heat exchanger, and the second coolant circuit branches from the first supply pipeline to the second heat exchanger.
- a branch pipeline connected to, a second supply pipeline that sends the coolant adjusted to the second set temperature by the second heat exchanger to the second load, and a coolant from the second load to the tank. It has a second return line to return, and the second return line is connected to the first return line, whereby the coolant in the second return line is the first return line. It may be configured to join the coolant in the road.
- a pressure adjusting valve is connected to the second supply pipe, and the pressure adjusting valve applies the pressure of the coolant flowing through the second coolant circuit to the pressure of the coolant flowing through the first coolant circuit. Set the pressure different from the pressure.
- the first coolant circuit is provided with a filtration pipe connecting the first supply pipe and the first return pipe, and the electric conduction of the coolant is provided in the filter pipe.
- a DI filter for adjusting the rate and a solenoid valve for opening and closing the filtration pipe are connected, and the electric conductivity of the coolant flowing through the first return pipe is measured in the first return pipe to measure the electromagnetic.
- a DI sensor that opens and closes the valve may be connected.
- the filtration line is closer to the first load than the position where the branch line of the first supply line branches, and the position where the second return line of the first return line joins. It is desirable that the position near the first heat exchanger is connected to each other.
- the refrigerating circuit includes a first refrigerant line connecting the outlet of the compressor and the inlet of the condenser, and a second refrigerant line connecting the outlet of the capacitor and the inlet of the first heat exchanger.
- a third refrigerant line connecting the outlet of the first heat exchanger and the inlet of the compressor, a fourth refrigerant line connecting the first refrigerant line and the inlet of the second heat exchanger, and the first. 2 It has a fifth refrigerant pipeline connecting the outlet of the heat exchanger and the inlet of the first heat exchanger, and a sixth refrigerant pipeline connecting the fourth refrigerant pipeline and the fifth refrigerant pipeline.
- a first expansion valve is connected to the second refrigerant line
- a second expansion valve is connected to the fifth refrigerant line
- a third expansion valve is connected to the sixth refrigerant line.
- the refrigerating circuit has a first refrigerant pipe connecting the outlet of the compressor and the inlet of the condenser, and a second refrigerant pipe connecting the outlet of the condenser and the inlet of the first heat exchanger.
- It has a pipeline and a seventh refrigerant pipeline branched from the sixth refrigerant pipeline and connected to the inlet of the second heat exchanger, and a first expansion valve is connected to the second refrigerant pipeline.
- the second expansion valve may be connected to the third refrigerant pipe
- the third expansion valve may be connected to the sixth refrigerant pipe
- the fourth expansion valve may be connected to the seventh refrigerant pipe.
- the chiller of the present invention distributes and supplies the coolant to a plurality of coolant circuits by one tank and one pump, and each coolant circuit is an individual heat exchanger whose heat exchange capacity can be individually controlled. Because the temperature of the coolant is adjusted to different set temperatures, it is smaller, lower cost, and energy-saving compared to known chillers that have multiple coolant circuits each with dedicated tanks and pumps. It is a thing.
- the chiller C1 of the first embodiment shown in FIG. 1 maintains a constant temperature by cooling two loads W1 and W2 having different temperatures with a coolant, and one tank 1 containing the coolant and one tank 1 containing the coolant are used.
- One pump 2 that discharges the coolant in the tank 1, and two coolant circuits 3 and 4 that separately supply the coolant discharged from the pump 2 to the two loads W1 and W2.
- One refrigerating circuit 5 that adjusts the temperature of the coolant of the two coolant circuits 3 and 4 to a set temperature, and two heats that individually connect the refrigerating circuit 5 and the two coolant circuits 3 and 4. It has exchangers 6 and 7 and a control device 8 that controls the entire chiller. In this embodiment, pure water is used as the cooling liquid.
- one of the first load W1 is a laser oscillator in a laser welding apparatus and is a low temperature load
- the other second load W2 is a probe that irradiates a laser beam. Therefore, the load is higher than that of the laser oscillator.
- the first coolant circuit 3 cools the first load W1
- the second coolant circuit 4 cools the second load W2.
- the first heat exchanger 6 connects the first coolant circuit 3 and the refrigerating circuit 5, and the second coolant circuit 4 and the refrigerating circuit 5 are connected to each other.
- the second heat exchanger 7 is connected to the 5.
- the temperature of the coolant supplied to the first load W1 is set to the optimum temperature in the range of 10-30 ° C, preferably in the range of 15-25 ° C.
- the flow rate of the coolant is set to the optimum flow rate in the range of 20-80 L / min.
- the temperature of the coolant supplied to the second load W2 is set to the optimum temperature in the range of 10-50 ° C, preferably 20-40 ° C.
- the flow rate of the coolant is set to the optimum flow rate in the range of 2-10 L / min.
- the set temperature of the coolant supplied to the second load W2 needs to be equal to or higher than the set temperature of the coolant supplied to the first load W1.
- the refrigerating circuit 5, one tank 1, one pump 2, and two coolant circuits 3 and 4 are housed inside one housing 9, and the two loads W1 and W2 are said to be the same. It is arranged outside the housing 9. Then, on the outer surface of the housing 9, the supply side load connection port 10 and the return side load connection port 11 for connecting the first load W1 to the first coolant circuit 3 and the second load W2 are provided. A supply-side load connection port 12 and a return-side load connection port 13 for connecting to the second coolant circuit 4 are provided, respectively.
- the refrigerating circuit 5 compresses a gaseous refrigerant into a high-temperature and high-pressure gaseous refrigerant, and cools the high-temperature and high-pressure gaseous refrigerant sent from the compressor 15 into a low-temperature and high-pressure liquid refrigerant. It has a condenser 16.
- the condenser 16 is an air-cooled condenser 16 in which the refrigerant is cooled by a fan 17 driven by the electric motor 17a, and the electric motor 17a and the compressor 15 are electrically connected to the control device 8 and the control device is connected to the control device 8.
- the inverter in 8 By controlling the inverter in 8, the respective rotation speeds, outputs, and the like are controlled.
- the capacitor 16 may be water-cooled.
- the refrigerating circuit 5 includes a first refrigerant line 21 connecting the outlet 15a of the compressor 15 and the inlet 16a of the condenser 16, the outlet 16b of the condenser 16 and the inlet 6a of the first heat exchanger 6.
- a second refrigerant line 22 connecting the first refrigerant line 22 and a third refrigerant line 23 connecting the outlet 6b of the first heat exchanger 6 and the inlet 15b of the compressor 15, the first refrigerant line 21 and the second heat.
- a fourth refrigerant line 24 connecting the inlet 7a of the exchanger 7, a fifth refrigerant line 25 connecting the outlet 7b of the second heat exchanger 7 and the inlet 6a of the first heat exchanger 6, and the above.
- the first heat exchanger 6 and the second heat exchanger 7 have a refrigerant flow unit 6A and 7A through which the refrigerant flows and a coolant flow unit 6B and 7B through which the coolant flows, and the refrigerant flow unit 6A , 7A and the coolant flowing through the coolant flow units 6B and 7B exchange heat. Therefore, in the refrigeration circuit 5, the inlets of the first heat exchanger 6 and the second heat exchanger 7 are the inlets 6a and 7a of the refrigerant flow units 6A and 7A, and the first heat exchanger 6 The outlets of the second heat exchanger 7 are the outlets 6b and 7b of the refrigerant flow units 6A and 7A.
- the inlets of the first heat exchanger 6 and the second heat exchanger 7 are the inlets 6c and 7c of the coolant flow units 6B and 7B. Therefore, the outlets of the first heat exchanger 6 and the second heat exchanger 7 are the outlets 6d and 7d of the coolant flow units 6B and 7B.
- the first expansion valve 27, the second expansion valve 28, and the third expansion valve 29 are electronic expansion valves whose opening degree can be arbitrarily adjusted by a stepping motor, and these expansion valves are electrically connected to the control device 8. It is connected, and the opening degree of each expansion valve 27, 28, 29 is controlled by this control device 8.
- a first refrigerant temperature sensor 30 that detects the temperature of the refrigerant discharged from the compressor 15 is connected to the first refrigerant line 21, and the condenser 16 and the first are connected to the second refrigerant line 22.
- a refrigerant filter 31 for removing foreign matter in the refrigerant and a first refrigerant pressure sensor 32 for detecting the pressure of the refrigerant are connected to a position between the expansion valve 27, and the third refrigerant pipeline 23 is connected to the third refrigerant pipeline 23.
- a second refrigerant pressure sensor 33 that detects the pressure of the refrigerant returning from the first heat exchanger 6 to the compressor 15 and a second refrigerant temperature sensor 34 that detects the temperature of the refrigerant are connected.
- the refrigerant temperature sensors 30 and 34 and the refrigerant pressure sensors 32 and 33 are electrically connected to the control device 8, and based on the measured refrigerant temperature and refrigerant pressure, the control device 8 causes the compressor 15 and the like. The rotation speed and output of the fan 17 are controlled.
- the first coolant circuit 3 includes a first supply pipe line 40 connecting the discharge port 2a of the pump 2 and the supply side load connection port 10, the return side load connection port 11, and the first heat exchanger 6. It has a first return pipe 41 connecting the inlet 6c of the first heat exchanger 6 and an inflow pipe 42 connecting the outlet 6d of the first heat exchanger 6 and the tank 1.
- the coolant discharged from the tank 1 by the pump 2 remains at the first set temperature, which is the temperature in the tank 1, through the first supply pipe 40. It is supplied to the 1 load W1 and cools the 1st load W1.
- the cooling liquid whose temperature has been raised by cooling the first load W1 is sent to the first heat exchanger 6 through the first return pipe line 41, and the temperature is adjusted by the first heat exchanger 6. After returning to the first set temperature, the liquid flows into the tank 1 from the inflow pipe 42.
- a first temperature sensor 43 for detecting the temperature of the coolant supplied to the first load W1 and a pressure sensor 44 for detecting the pressure of the coolant are connected to the first supply pipeline 40, and the first is described.
- a second temperature sensor 45 that detects the temperature of the coolant returning from the first load W1 to the tank 1 is connected to the return pipeline 41.
- the first temperature sensor 43, the second temperature sensor 45, and the pressure sensor 44 are electrically connected to the control device 8 to the temperature of the coolant measured by the first temperature sensor 43 and the second temperature sensor 45. Based on this, the control device 8 adjusts the opening degrees of the expansion valves 27, 28, 29 to control the heat exchange capacity of the first heat exchanger 6, and the coolant measured by the pressure sensor 44.
- the pump 2 is controlled by the control device 8 based on the pressure of the above.
- the member with the reference numeral 46 in the figure is a level switch for detecting the liquid level of the coolant inside the tank 1, and the member with the reference numeral 47 is a drain discharge pipe. Further, the pump 2 is a non-immersion type pump installed outside the tank 1.
- the second coolant circuit 4 has a branch pipeline 50 branched from the first supply pipeline 40 of the first coolant circuit 3 and connected to the inlet 7c of the second heat exchanger 7.
- the second supply pipe 51 connecting the outlet 7d of the second heat exchanger 7 and the supply side load connection port 12, the return side load connection port 13, and the first return pipe 41 of the first coolant circuit 3 It has a second return pipeline 52 that connects to and.
- the position where the second return pipe 52 is connected to the first return pipe 41 is a position on the upstream side (closer to the return side load connection port 11) than the position where the second temperature sensor 45 is provided. be.
- the coolant discharged by the pump 2 is sent to the second heat exchanger 7 through the branch pipeline 50, and is sent to the second heat exchanger 7 by the second heat exchanger 7.
- the second load W2 After being adjusted to a second set temperature different from the first set temperature, it is sent to the second load W2 through the second supply pipeline 51 to cool the second load W2.
- the cooling liquid raised by cooling the second load W2 flows into the first return pipe 41 from the second return pipe 52, and flows through the first return pipe 41.
- the temperature is adjusted by the first heat exchanger 6 and returned to the first set temperature, and then the tank 1 is sent from the inflow pipe 42. Inflow to.
- the set temperature (second set temperature) of the coolant in the second coolant circuit 4 is set to the coolant in the first coolant circuit 3. It is higher than the temperature (first set temperature). Therefore, the second heat exchanger 7 heats the coolant sent from the tank 1 via the first coolant circuit 3 and the branch pipeline 50 while maintaining the first set temperature. 2 The temperature is raised to the set temperature. Therefore, it can be said that the second heat exchanger 7 is a heat exchanger for heating.
- a third temperature sensor 53 that detects the temperature of the coolant supplied to the second load W2 and a pressure adjusting valve 54 that changes the pressure of the coolant are connected in series.
- the third temperature sensor 53 and the pressure regulating valve 54 are electrically connected to the control device 8, and the second expansion in the control device 8 is based on the temperature of the coolant measured by the third temperature sensor 53.
- the pressure adjusting valve in the control device 8 is used.
- the pressure adjusting valve 54 may be a manually operated valve.
- the first coolant circuit 3 is provided with a filtration pipe line 60 for purifying the coolant whose purity has decreased due to an increase in ionic substances.
- One end of the filtration pipe 60 is connected to a position on the downstream side (closer to the first load W1) of the first supply pipe 40 from the position where the branch pipe 50 branches, and the other of the filtration pipe 60. The end is connected to a position on the downstream side (closer to the first heat exchanger 6) of the first return pipe 41 from the position to which the second return pipe 52 is connected.
- a DI filter 61 for removing an ionic substance and a solenoid valve 62 for opening and closing the filtration pipe 60 are connected in series to the filtration pipe 60.
- a DI sensor 63 for measuring the electric conductivity of the coolant is connected to the confluence of the filtration pipe 60 and the first return pipe 41.
- the DI filter 61 adsorbs an ionic substance in the coolant to the resin surface by ion exchange and removes the DI filter 61, and is detachably connected to the filter connecting portions 64 and 65 formed in the filtration pipe line 60. Has been done.
- the DI filter 61 may be disposed inside the housing 9 or may be disposed outside the housing 9.
- the solenoid valve 62 and the DI sensor 63 are electrically connected to the control device 8, and the solenoid valve 62 is controlled to open / close by the control device 8 according to the electrical conductivity measured by the DI sensor 63. Will be done.
- the filtration pipe line 60 operates as follows. That is, when the electric conductivity of the coolant in the first return pipe 41 measured by the DI sensor 63 is higher than the reference value due to the increase in the ionic substance, the coolant recirculates. The electrical conductivity of the coolant in the tank 1 is also high. Therefore, the solenoid valve 62 is opened by the control device 8, and the coolant of the first supply pipe 40 flows into the filtration pipe 60, so that the ionic substance in the coolant is removed by the DI filter 61. The purified and purified coolant is sent to the tank 1 through the first return pipe 41. By continuing this operation, the coolant in the tank 1 is purified. As a result, the coolant of the first coolant circuit 3 and the coolant of the second coolant circuit 4 can always be kept at the same purity (liquid quality).
- the chiller C1 of the first embodiment operates as follows.
- the high-temperature and high-pressure gaseous refrigerant discharged from the compressor 15 is cooled by the condenser 16 to become a low-temperature and high-pressure liquid refrigerant, and then first expanded from the second refrigerant conduit 22. It is sent to the first heat exchanger 6 through the valve 27, and after exchanging heat with the coolant of the first coolant circuit 3 in the first heat exchanger 6, the coolant is cooled to the first set temperature, and then the first 3 Return to the compressor 15 through the refrigerant conduit 23.
- the second heat exchanger 7 describes the above.
- the gaseous refrigerant is condensed by heating the coolant in the second heat exchanger 7, and then expanded by the second expansion valve 28, so that the temperature is further lowered.
- a part of the high-temperature and high-pressure gaseous refrigerant discharged from the compressor 15 is sent from the sixth refrigerant pipe 26 to the first heat exchanger 6 via the third expansion valve 29, and the second one. 1 Used for adjusting the temperature of the refrigerant flowing into the heat exchanger 6.
- the first coolant circuit 3 After the coolant in the tank 1 adjusted to the first set temperature is discharged from the pump 2, the first set temperature is reached through the first supply pipe 40. It is sent to the first load W1 as it is, and the first load W1 is cooled. The cooling liquid raised by cooling the first load W1 is sent to the first heat exchanger 6 through the first return pipe 41, and is adjusted to the first set temperature by the first heat exchanger 6. After that, it flows into the tank 1 from the inflow pipe 42.
- the temperature of the coolant is constantly measured by the first temperature sensor 43 and the second temperature sensor 45, and based on the measured temperature of the coolant, the control device 8 determines the first expansion valve 27 and the second expansion valve 27 of the refrigeration circuit 5. By controlling the opening degree of the 3 expansion valve 29, the temperature of the coolant is adjusted to the first set temperature.
- the opening degree of the first expansion valve 27 in the refrigerating circuit 5 is expanded to increase the flow rate of the low temperature refrigerant, and the opening degree of the third expansion valve 29 is decreased to reduce the flow rate of the high temperature refrigerant. ..
- the temperature of the refrigerant flowing into the first heat exchanger 6 decreases and the cooling capacity of the first heat exchanger 6 increases, so that the coolant is cooled and the temperature becomes the first set temperature. It will be adjusted.
- the temperature of the coolant is lower than the first set temperature, it is necessary to heat the coolant with the first heat exchanger 6 to raise the temperature, so that the first expansion valve 27 As the opening degree decreases and the flow rate of the low temperature refrigerant decreases, the opening degree of the third expansion valve 29 increases and the flow rate of the high temperature refrigerant increases. As a result, the temperature of the refrigerant flowing into the first heat exchanger 6 rises, the cooling liquid is heated by the heated refrigerant, and the temperature is adjusted to the first set temperature.
- the second coolant circuit 4 a part of the coolant discharged from the pump 2 at the first set temperature flows into the second heat exchanger 7 through the branch pipeline 50, and the second heat. It is heated by exchanging heat with a high-temperature and high-pressure gaseous refrigerant in the exchanger 7, adjusted to a second set temperature higher than the first set temperature, and then sent to the second load W2 through the second supply pipeline 51.
- the second load W2 is cooled.
- the coolant whose temperature has been raised by cooling the second load W2 flows from the second return pipe 52 into the first return pipe 41, and is from the first load W1 flowing through the first return pipe 41. After merging with the coolant and being sent to the first heat exchanger 6, the temperature is adjusted by the first heat exchanger 6 to return to the first set temperature, and then the water flows into the tank 1 from the inflow pipe 42. do.
- the temperature of the coolant supplied to the second load W2 is constantly measured by the third temperature sensor 53 connected to the second supply pipeline 51, and the refrigeration circuit is performed by the control device 8 based on the measured temperature. By controlling the opening degree of the second expansion valve 28 of 5, the temperature of the coolant is adjusted to the second set temperature.
- the temperature of the coolant flowing through the second supply pipeline 51 is higher than the second set temperature, it is necessary to lower the temperature of the coolant, so that the opening degree of the second expansion valve 28 in the refrigeration circuit 5 is open.
- the heating capacity of the second heat exchanger 7 is reduced by reducing or closing the temperature, and as a result, the temperature of the coolant is lowered and adjusted to the second set temperature.
- the solenoid valve 62 is opened, the filtration line 60 is opened, and the coolant flows through the filtration line 60, so that the ionic substance in the coolant is removed by the DI filter 61.
- a part of the coolant may be allowed to flow through the filtration pipe 60 to be filtered, or the load may be stopped from being cooled and the entire coolant may be filtered. It can also be flowed through the conduit 60 for filtration.
- FIG. 2 shows the chiller C2 of the second embodiment.
- the difference between the chiller C2 and the chiller C1 of the first embodiment is the configuration of the refrigerating circuit 5A, the configurations of the first coolant circuit 3 and the second coolant circuit 4, and the first heat exchanger 6 and the first.
- the configuration of the two heat exchangers 7 is the same as that of the chiller of the first embodiment. Therefore, in the following description, the configuration of the refrigerating circuit 5A will be described, and the first coolant circuit 3 and the second coolant circuit 4 and the first heat exchanger 6 and the second heat exchanger 7 will be described. , The same reference numerals as those used in the first embodiment are added, and the description thereof will be omitted.
- the refrigerating circuit 5A connects the first refrigerant line 72 connecting the outlet 70a of the compressor 70 and the inlet 71a of the condenser 71, and the outlet 71b of the condenser 71 and the inlet 6a of the first heat exchanger 6.
- It has a fourth refrigerant line 75 connecting the inlet 70b of the compressor 70 and a fifth refrigerant line 76 connecting the outlet 7b of the second heat exchanger 7 and the fourth refrigerant line 75. ..
- the first expansion valve 77 is connected to the position of the second refrigerant pipe 73 closer to the first heat exchanger 6 than the position where the third refrigerant pipe 74 branches, and the third refrigerant pipe 74 is connected.
- the second expansion valve 78 is connected to the.
- the sixth refrigerant line 79 branching from the first refrigerant line 72 is located in the second refrigerant line 73 at a position closer to the inlet 6a of the first heat exchanger 6 than the first expansion valve 77.
- a third expansion valve 80 is connected to the sixth refrigerant line 79, and a seventh refrigerant line 81 branching from the sixth refrigerant line 79 is connected to the third refrigerant line 74.
- the second expansion valve 78 is connected at a position closer to the inlet 7a of the second heat exchanger 7, and the fourth expansion valve 82 is connected to the seventh refrigerant pipeline 81.
- a first refrigerant temperature sensor 83 that detects the temperature of the refrigerant discharged from the compressor 70 is connected to the first refrigerant line 72, and flows out from the condenser 71 to the second refrigerant line 73.
- a refrigerant filter 84 that removes foreign matter in the refrigerant and a first refrigerant pressure sensor 85 that detects the pressure of the refrigerant are connected, and the first heat exchanger 6 and the second heat exchanger 6 are connected to the fourth refrigerant pipeline 75.
- a second refrigerant pressure sensor 86 that detects the pressure of the refrigerant returning from the heat exchanger 7 to the compressor 70 and a second refrigerant temperature sensor 87 that detects the temperature of the refrigerant are connected.
- the chiller of the second embodiment operates as follows.
- the high-temperature and high-pressure gaseous refrigerant discharged from the compressor 70 is cooled by the condenser 71 to become a low-temperature and high-pressure liquid refrigerant, and then first expanded from the second refrigerant pipeline 73.
- the first heat exchanger 6 is sent from the third refrigerant pipe 74 to the second heat exchanger 7 through the second expansion valve 78, and at the same time, the first heat exchanger 6 is used to send the first heat exchanger.
- the coolant is heat-exchanged with the coolant of the coolant circuit 3 to adjust the coolant to the first set temperature, and the second heat exchanger 7 exchanges heat with the coolant of the second coolant circuit 4 to cool the coolant. Adjust the liquid to the second set temperature. Then, the refrigerant exiting the first heat exchanger 6 and the second heat exchanger 7 returns to the inlet 70b of the compressor 70 through the fourth refrigerant pipe 75 and the fifth refrigerant pipe 76.
- a part of the high-temperature and high-pressure gaseous refrigerant discharged from the compressor 70 is sent to the first heat exchanger 6 via the sixth refrigerant conduit 79 and the third expansion valve 80, and is also said. It is sent to the second heat exchanger 7 via the seventh refrigerant pipe 81 and the fourth expansion valve 82, and is used for adjusting the temperature of the refrigerant flowing into each of the heat exchangers 6 and 7.
- the first coolant circuit 3 after the coolant in the tank 1 adjusted to the first set temperature is discharged from the pump 2, the first set temperature is reached through the first supply pipe 40. It is sent to the first load W1 as it is, and the first load W1 is cooled. The cooling liquid raised by cooling the first load W1 is sent to the first heat exchanger 6 through the first return pipe line 41, and returns to the first set temperature by the first heat exchanger 6. After that, it flows into the tank 1 from the inflow pipe 42.
- the temperature of the coolant is constantly measured by the first temperature sensor 43 and the second temperature sensor 45, and based on the measured temperature of the coolant, the control device 8 determines the first expansion valve 77 and the first expansion valve 77 of the refrigeration circuit 5A. By controlling the opening degree of the 3 expansion valve 80, the temperature of the coolant is adjusted to the first set temperature.
- the opening degree of the first expansion valve 77 in the refrigerating circuit 5A increases to increase the flow rate of the low temperature refrigerant, and the opening degree of the third expansion valve 80 decreases to reduce the flow rate of the high temperature refrigerant.
- the temperature of the refrigerant flowing into the first heat exchanger 6 decreases and the cooling capacity of the first heat exchanger 6 increases, so that the coolant is cooled and the temperature becomes the first set temperature. It will be adjusted.
- the opening degree of the third expansion valve 80 increases and the flow rate of the high temperature refrigerant increases.
- the temperature of the refrigerant flowing into the first heat exchanger 6 rises, the cooling liquid is heated by the heated refrigerant, and the temperature is adjusted to the first set temperature.
- the second coolant circuit 4 a part of the coolant discharged from the pump 2 at the first set temperature flows into the second heat exchanger 7 through the branch pipeline 50, and the second heat.
- the temperature is raised by exchanging heat with the refrigerant in the exchanger 7, adjusted to a second set temperature higher than the first set temperature, and then sent to the second load W2 through the second supply pipeline 51. 2 Cool the load W2.
- the cooling liquid whose temperature has been raised by cooling the second load W2 flows from the second return pipe line 52 into the first return pipe line 41, merges with the cooling liquid from the first load W1, and is said to be the first. 1 It is sent to the heat exchanger 6, the temperature is adjusted by the first heat exchanger 6 and returned to the first set temperature, and then the liquid flows into the tank 1 from the inflow pipe 42.
- the temperature of the coolant supplied to the second load W2 is constantly measured by the third temperature sensor 53 connected to the second supply pipeline 51, and the refrigeration circuit is performed by the control device 8 based on the measured temperature.
- the control device 8 By controlling the opening degrees of the second expansion valve 78 and the fourth expansion valve 82 of 5A, the temperature of the coolant is adjusted to the second set temperature.
- the opening degree of the second expansion valve 78 in the refrigerating circuit 5A increases to increase the flow rate of the low temperature refrigerant, and the opening degree of the fourth expansion valve 82 decreases to reduce the flow rate of the high temperature refrigerant.
- the temperature of the refrigerant flowing into the second heat exchanger 7 decreases and the cooling capacity of the second heat exchanger 7 increases, so that the coolant is cooled and the temperature reaches the second set temperature. It will be adjusted.
- the second expansion valve 78 As the opening degree decreases and the flow rate of the low temperature refrigerant decreases, the opening degree of the fourth expansion valve 82 increases and the flow rate of the high temperature refrigerant increases. As a result, the temperature of the refrigerant flowing into the second heat exchanger 7 rises, the cooling liquid is heated by the raised refrigerant, and the temperature is adjusted to the second set temperature.
- the ionic substance in the coolant increases and the purity of the coolant decreases, the ionic substance is removed by the action of the DI filter 61 as in the case of the first embodiment. The same is true.
- the chiller C1 of the first embodiment and the chiller C2 of the second embodiment have two coolant circuits 3 and 4, respectively, but the chiller of the present invention has three or more coolant circuits. Can be done. For example, having one said first coolant circuit 3 and two or more said second coolant circuits 4 may also have two or more said first coolant circuits 3 and one said second coolant circuit 4. It is also possible to have two or more of the first coolant circuits 3 and two or more of the second coolant circuits 4.
- the first coolant circuit 3 and the first expansion valve 27 and the third expansion valve 29 are provided.
- the included refrigerant circuit unit 5a may be connected to each other in parallel with the circuit components connected to each other by the first heat exchanger 6, and when two or more of the second coolant circuits 4 are provided.
- the second coolant circuit 4 and the refrigerant circuit unit 5b including the second expansion valve 28 may connect circuit components connected to each other by the second heat exchanger 7 in parallel with each other. ..
- the first coolant circuit 3 and the first expansion valve 77 and the third expansion valve 80 are included.
- the refrigerant circuit unit 5a and the circuit components connected to each other by the first heat exchanger 6 may be connected in parallel to each other, and when two or more of the second coolant circuits 4 are provided, the second coolant circuit 4 may be provided.
- the second coolant circuit 4 and the refrigerant circuit unit 5b including the second expansion valve 78 and the fourth expansion valve 82 parallel the circuit components connected to each other by the second heat exchanger 7. Just connect to.
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Abstract
Description
しかしながら、この第2及び第3のチラーは、1つの熱交換器で温度調整した冷却液を複数の冷却液回路に分散して供給するようにしているため、温度の異なる複数の負荷に対応することができない。
また、前記2つの冷却液回路3,4のうち、第1負荷W1を冷却するのが第1冷却液回路3であり、第2負荷W2を冷却するのが第2冷却液回路4である。
さらに、前記2つの熱交換器6,7のうち、前記第1冷却液回路3と冷凍回路5とを接続するのが第1熱交換器6であり、前記第2冷却液回路4と冷凍回路5とを接続するのが第2熱交換器7である。
一方、前記第2冷却液回路4において、前記第2負荷W2に供給される冷却液の温度は、10-50℃の範囲、好ましくは20-40℃の範囲で、最適の温度に設定され、冷却液の流量は、2-10L/minの範囲で最適の流量に設定される。但し、第2負荷W2に供給される冷却液の設定温度は、第1負荷W1に供給される冷却液の設定温度に比べ、同等以上であることが必要である。
これにより、前記第1冷却液回路3において、前記タンク1からポンプ2で吐出された冷却液は、前記タンク1内での温度である第1設定温度のまま前記第1供給管路40を通じて第1負荷W1に供給され、前記第1負荷W1を冷却する。そして、この第1負荷W1を冷却することにより昇温した冷却液は、前記第1戻り管路41を通じて前記第1熱交換器6に送られ、この第1熱交換器6で温度調整されて第1設定温度に戻されたあと、前記流入管路42からタンク1に流入する。
前記第1温度センサ43、第2温度センサ45、及び圧力センサ44は、前記制御装置8に電気的に接続され、前記第1温度センサ43及び第2温度センサ45が測定した冷却液の温度に基づいて、前記制御装置8で前記膨張弁27,28,29の開度が調整されることにより、前記第1熱交換器6の熱交換能力が制御され、前記圧力センサ44が測定した冷却液の圧力に基づいて、前記制御装置8で前記ポンプ2が制御される。
また、前記ポンプ2は、前記タンク1の外部に設置される非浸漬式のポンプである。
前記第3温度センサ53及び圧力調整弁54は、前記制御装置8に電気的に接続され、前記第3温度センサ53が測定した冷却液の温度に基づいて、前記制御装置8で前記第2膨張弁28の開度が調整されることにより、前記第2熱交換器7の熱交換能力が制御される。また、前記第2供給管路51を流れる冷却液の圧力を前記第1供給管路40を流れる冷却液の圧力と異なる圧力にする必要がある場合には、前記制御装置8で前記圧力調整弁54が制御される。しかし、前記圧力調整弁54は、手動操作式の弁であっても良い。
前記冷凍回路5において、前記圧縮機15から吐出された高温高圧のガス状冷媒は、前記コンデンサ16で冷却されて低温高圧の液状冷媒になったあと、前記第2冷媒管路22から第1膨張弁27を通じて第1熱交換器6に送られ、該第1熱交換器6で前記第1冷却液回路3の冷却液と熱交換して該冷却液を第1設定温度に冷却したあと、第3冷媒管路23を通じて前記圧縮機15に戻る。
前記第1負荷W1を冷却することにより昇温した冷却液は、第1戻り管路41を通じて前記第1熱交換器6に送られ、該第1熱交換器6で前記第1設定温度に調整されたあと、前記流入管路42から前記タンク1に流入する。
このとき、前記負荷の冷却を続けながら、前記冷却液の一部を前記濾過管路60に流して濾過するようにすることも、前記負荷の冷却を停止し、前記冷却液の全部を前記濾過管路60に流して濾過するようにすることもできる。
そこで、以下の説明においては、前記冷凍回路5Aの構成について説明し、前記第1冷却液回路3及び第2冷却液回路4と、前記第1熱交換器6及び第2熱交換器7については、第1実施形態で用いた符号と同一の符号を付してその説明は省略する。
前記冷凍回路5Aにおいて、前記圧縮機70から吐出された高温高圧のガス状冷媒は、前記コンデンサ71で冷却されて低温高圧の液状冷媒になったあと、前記第2冷媒管路73から第1膨張弁77を通じて第1熱交換器6に送られると同時に、前記第3冷媒管路74から第2膨張弁78を通じて第2熱交換器7に送られ、前記第1熱交換器6で前記第1冷却液回路3の冷却液と熱交換して該冷却液を第1設定温度に調整すると共に、前記第2熱交換器7で前記第2冷却液回路4の冷却液と熱交換して該冷却液を第2設定温度に調整する。そして、前記第1熱交換器6及び第2熱交換器7を出た冷媒は、第4冷媒管路75及び第5冷媒管路76を通って圧縮機70の入口70bに戻る。
前記第1負荷W1を冷却することにより昇温した冷却液は、第1戻り管路41を通じて前記第1熱交換器6に送られ、該第1熱交換器6で前記第1設定温度に戻されたあと、前記流入管路42から前記タンク1に流入する。
W1 第1負荷
W2 第2負荷
1 タンク
2 ポンプ
3 第1冷却液回路
4 第2冷却液回路
5,5A 冷凍回路
6 第1熱交換器
6a,6c 入口
6b,6d 出口
7 第2熱交換器
7a,7c 入口
7b,7d 出口
8 制御装置
15,70 圧縮機
15a,70a 出口
15b,70b 入口
16,71 コンデンサ
16a,71a 入口
16b,71b 出口
21,72 第1冷媒管路
22,73 第2冷媒管路
23,74 第3冷媒管路
24,75 第4冷媒管路
25,76 第5冷媒管路
26,79 第6冷媒管路
27,77 第1膨張弁
28,78 第2膨張弁
29,80 第3膨張弁
40 第1供給管路
41 第1戻り管路
50 分岐管路
51 第2供給管路
52 第2戻り管路
54 圧力調整弁
60 濾過管路
61 DIフィルタ
62 電磁弁
63 DIセンサ
81 第7冷媒管路
82 第4膨張弁
Claims (7)
- 冷却液を収容する1つのタンクと、該タンク内の冷却液を吐出する1つのポンプと、該ポンプが吐出する冷却液を分流して複数の負荷に個別に供給する複数の冷却液回路と、前記冷却液の温度を該冷却液と冷媒との熱交換により調整する冷凍回路とを有し、
前記複数の冷却液回路と冷凍回路とは、熱交換能力を個々に制御可能な個別の熱交換器を介して相互に接続され、
前記複数の冷却液回路は、第1負荷を冷却する第1冷却液回路と、該第1負荷と異なる温度の第2負荷を冷却する第2冷却液回路とを有し、
前記第1冷却液回路と冷凍回路とを接続する第1熱交換器は、前記第1負荷及び第2負荷から前記タンクに戻る冷却液の温度を調整し、
前記第2冷却液回路と冷凍回路とを接続する第2熱交換器は、前記タンクから前記第2負荷に供給される冷却液の温度を調整する、
ことを特徴とするチラー。 - 前記第1冷却液回路は、前記ポンプから吐出された冷却液を、タンク内での温度である第1設定温度のまま第1負荷に送る第1供給管路と、第1負荷からの冷却液を前記タンクに戻す第1戻り管路とを有していて、該第1戻り管路に前記第1熱交換器が接続されており、それによって該第1戻り管路の冷却液は、前記第1熱交換器で前記第1設定温度に調整されたあと前記タンクに流入し、
前記第2冷却液回路は、前記第1供給管路から分岐して前記第2熱交換器に接続された分岐管路と、前記第2熱交換器で第2設定温度に調整された冷却液を第2負荷に送る第2供給管路と、第2負荷からの冷却液を前記タンクに戻す第2戻り管路とを有していて、該第2戻り管路は前記第1戻り管路に接続されており、それによって該第2戻り管路の冷却液は、前記第1戻り管路の冷却液に合流する、
ことを特徴とする請求項1に記載のチラー。 - 前記第2供給管路に圧力調整弁が接続され、該圧力調整弁は、前記第2冷却液回路を流れる冷却液の圧力を前記第1冷却液回路を流れる冷却液の圧力とは異なる圧力にすることを特徴とする請求項2に記載のチラー。
- 前記第1冷却液回路に、前記第1供給管路と第1戻り管路とを接続する濾過管路が設けられ、該濾過管路に、前記冷却液の電気伝導率を調整するDIフィルタと、該濾過管路を開閉する電磁弁とが接続され、
前記第1戻り管路に、該第1戻管路を流れる冷却液の電気伝導率を測定して前記電磁弁を開閉させるDIセンサが接続されている、
ことを特徴とする請求項2又は3に記載のチラー。 - 前記濾過管路は、前記第1供給管路の前記分岐管路が分岐する位置よりも第1負荷寄りの位置と、前記第1戻り管路の前記第2戻り管路が合流する位置よりも第1熱交換器寄りの位置とを、相互に接続していることを特徴とする請求項4に記載のチラー。
- 前記冷凍回路は、圧縮機の出口とコンデンサの入口とを結ぶ第1冷媒管路と、該コンデンサの出口と前記第1熱交換器の入口とを結ぶ第2冷媒管路と、前記第1熱交換器の出口と前記圧縮機の入口を結ぶ第3冷媒管路と、前記第1冷媒管路と前記第2熱交換器の入口とを結ぶ第4冷媒管路と、前記第2熱交換器の出口と前記第1熱交換器の入口とを結ぶ第5冷媒管路と、前記第4冷媒管路と該第5冷媒管路とを結ぶ第6冷媒管路とを有し、
前記第2冷媒管路に第1膨張弁が接続され、前記第5冷媒管路に第2膨張弁が接続され、前記第6冷媒管路に第3膨張弁が接続されている、
ことを特徴とする請求項1から5の何れかに記載のチラー。 - 前記冷凍回路は、圧縮機の出口とコンデンサの入口とを結ぶ第1冷媒管路と、該コンデンサの出口と前記第1熱交換器の入口とを結ぶ第2冷媒管路と、該第2冷媒管路と前記第2熱交換器の入口とを結ぶ第3冷媒管路と、前記第1熱交換器の出口と前記圧縮機の入口を結ぶ第4冷媒管路と、前記第2熱交換器の出口と前記第4冷媒管路とを結ぶ第5冷媒管路と、前記第1冷媒管路から分岐して前記第1熱交換器の入口に接続された第6冷媒管路と、該第6冷媒管路から分岐して前記第2熱交換器の入口に接続された第7冷媒管路とを有し、
前記第2冷媒管路に第1膨張弁が接続され、前記第3冷媒管路に第2膨張弁が接続され、前記第6冷媒管路に第3膨張弁が接続され、前記第7冷媒管路に第4膨張弁が接続されている、
ことを特徴とする請求項1から5の何れかに記載のチラー。
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KR20230039635A (ko) | 2023-03-21 |
US20240011681A1 (en) | 2024-01-11 |
MX2023000762A (es) | 2023-02-13 |
EP4184079A1 (en) | 2023-05-24 |
JP7559394B2 (ja) | 2024-10-02 |
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CN116194723A (zh) | 2023-05-30 |
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