WO2020136997A1 - Procédé de commande de fonctionnement pour machine à glaçons - Google Patents

Procédé de commande de fonctionnement pour machine à glaçons Download PDF

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Publication number
WO2020136997A1
WO2020136997A1 PCT/JP2019/033661 JP2019033661W WO2020136997A1 WO 2020136997 A1 WO2020136997 A1 WO 2020136997A1 JP 2019033661 W JP2019033661 W JP 2019033661W WO 2020136997 A1 WO2020136997 A1 WO 2020136997A1
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WO
WIPO (PCT)
Prior art keywords
ice
ice making
making machine
operation control
pressure
Prior art date
Application number
PCT/JP2019/033661
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English (en)
Japanese (ja)
Inventor
宏一 北
明裕 梶本
一彦 西原
孝将 伊東
裕司 山中
植野　武夫
Original Assignee
ダイキン工業株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ダイキン工業株式会社 filed Critical ダイキン工業株式会社
Priority to US17/417,816 priority Critical patent/US20220057130A1/en
Priority to EP19902266.6A priority patent/EP3904789B1/fr
Priority to CN201980085900.1A priority patent/CN113227681A/zh
Publication of WO2020136997A1 publication Critical patent/WO2020136997A1/fr

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Classifications

    • 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
    • F25C—PRODUCING, WORKING OR HANDLING ICE
    • F25C5/00—Working or handling ice
    • F25C5/02—Apparatus for disintegrating, removing or harvesting ice
    • F25C5/04—Apparatus for disintegrating, removing or harvesting ice without the use of saws
    • F25C5/12—Ice-shaving machines
    • 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
    • F25C—PRODUCING, WORKING OR HANDLING ICE
    • F25C1/00—Producing ice
    • F25C1/12—Producing ice by freezing water on cooled surfaces, e.g. to form slabs
    • F25C1/14—Producing ice by freezing water on cooled surfaces, e.g. to form slabs to form thin sheets which are removed by scraping or wedging, e.g. in the form of flakes
    • F25C1/145—Producing ice by freezing water on cooled surfaces, e.g. to form slabs to form thin sheets which are removed by scraping or wedging, e.g. in the form of flakes from the inner walls of cooled bodies
    • F25C1/147—Producing ice by freezing water on cooled surfaces, e.g. to form slabs to form thin sheets which are removed by scraping or wedging, e.g. in the form of flakes from the inner walls of cooled bodies by using augers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • F25B49/022—Compressor control arrangements
    • 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
    • F25C—PRODUCING, WORKING OR HANDLING ICE
    • F25C1/00—Producing ice
    • F25C1/12—Producing ice by freezing water on cooled surfaces, e.g. to form slabs
    • F25C1/14—Producing ice by freezing water on cooled surfaces, e.g. to form slabs to form thin sheets which are removed by scraping or wedging, e.g. in the form of flakes
    • F25C1/145—Producing ice by freezing water on cooled surfaces, e.g. to form slabs to form thin sheets which are removed by scraping or wedging, e.g. in the form of flakes from the inner walls of cooled bodies
    • 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
    • F25C—PRODUCING, WORKING OR HANDLING ICE
    • F25C2301/00—Special arrangements or features for producing ice
    • F25C2301/002—Producing ice slurries
    • 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
    • F25C—PRODUCING, WORKING OR HANDLING ICE
    • F25C2600/00—Control issues
    • F25C2600/04—Control means
    • 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
    • F25C—PRODUCING, WORKING OR HANDLING ICE
    • F25C2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25C2700/08—Power to drive the auger motor of an auger type ice making machine

Definitions

  • the present disclosure relates to an operation control method of an ice making machine. More specifically, the present invention relates to an operation control method for an ice maker that produces a sherbet-like ice slurry.
  • Sherbet-like ice slurry may be used to refrigerate fish.
  • a double-tube type ice making machine including an inner tube and an outer tube has been conventionally known (for example, refer to Patent Document 1).
  • An ice making system provided with such an ice making machine has a tank for containing a cooled medium such as seawater, and the cooled medium supplied from the tank to the inner pipe of the ice making machine is the outer pipe of the ice making machine. Ice slurry is generated by heat exchange with the refrigerant supplied to the annular space with the inner pipe, and the generated ice slurry is returned to the tank.
  • the ice filling rate IPF (Ice Packing Factor), which is the ratio of ice stored in the tank (ice/(ice+medium to be cooled)
  • IPF Ice Packing Factor
  • the amount of ice making in the tank is estimated using a water level sensor, an ultrasonic sensor, or the like provided in the tank, and the operation of the ice making machine is controlled based on the estimated amount of ice making.
  • the ice-making machine in the above-mentioned ice-making system controls the operation of the ice-making machine, which is an element on the equipment side, based on the operation command from the sensor attached to the tank, which is an element on the equipment side. Therefore, the reliability of the operation control of the ice making machine may be deteriorated due to the communication abnormality with the equipment side or the like.
  • the present disclosure aims to provide an operation control method for an ice maker that can improve the reliability of operation control.
  • the operation control method of the ice making machine according to the first aspect of the present disclosure (hereinafter, also simply referred to as “operation control method”) is (1) An operation control method for an ice maker, which cools a medium to be cooled by heat exchange with a refrigerant to generate ice, When the drive current of the ice scraper provided in the ice maker exceeds a first current value, the evaporation temperature of the refrigerant supplied to the ice maker is increased.
  • the operation of the ice making machine is controlled based on the current value of the ice scraping section of the ice making machine, which is an element on the device side. For this reason, problems such as communication abnormality with the equipment side as in the past do not occur, and reliability of operation control of the ice making machine can be improved.
  • the evaporation temperature can be raised stepwise according to the excess of the current.
  • the evaporation temperature of the ice scraping unit of the ice making machine step by step in accordance with the excess amount from the first current value, it is possible to suppress the ice production of the ice making machine stepwise.
  • the operation control method according to the second aspect of the present disclosure, (4) An operation control method for an ice maker, which cools a medium to be cooled by heat exchange with a refrigerant to generate ice, When the differential pressure between the pressure at the inlet of the medium to be cooled and the pressure at the outlet of the ice making machine exceeds a first pressure value, the evaporation temperature of the refrigerant supplied to the ice making machine is raised.
  • the operation of the ice making machine is controlled based on the pressure difference between the pressure at the inlet and the pressure at the outlet of the medium to be cooled in the ice making machine, which is an element on the device side. To do. For this reason, problems such as communication abnormality with the equipment side as in the past do not occur, and reliability of operation control of the ice making machine can be improved.
  • the evaporation temperature can be raised stepwise according to the excess of the differential pressure.
  • the evaporation temperature of the ice making machine is increased stepwise by increasing the evaporation temperature stepwise according to the excess of the differential pressure between the pressure at the inlet and the pressure at the outlet of the cooled medium in the ice making machine from the first pressure value.
  • the generation of ice can be suppressed in stages.
  • the operation of the ice making machine can be stopped when the differential pressure exceeds a second pressure value that is larger than the first pressure value.
  • FIG. 3 is a cross-sectional explanatory view of an ice scraping portion in the ice making machine shown in FIG. 2.
  • FIG. 2 It is a figure which shows the example of control of the evaporation temperature in the operation control method which concerns on 1st Embodiment. It is a graph explaining the behavior of the motor current by the operation control method according to the first embodiment. It is a figure which shows the example of control of the evaporation temperature in the operation control method which concerns on 2nd Embodiment.
  • FIG. 1 is a schematic configuration diagram of an ice making system A including an ice making machine 1 to which the operation control method of the present disclosure is applied
  • FIG. 2 is a side view of the ice making machine 1 shown in FIG. 1.
  • the ice making system A is a system in which sea water stored in a sea water tank, which will be described later, is used as a raw material to continuously generate ice slurry in the ice making machine 1, and the generated ice slurry is returned to the sea water tank.
  • the ice slurry refers to sherbet-like ice in which fine ice is turbid in water or an aqueous solution, and is also called slurry ice, ice slurry, slurry ice, sraf ice, or liquid ice.
  • the ice making system A can continuously generate an ice slurry based on seawater. Therefore, the ice making system A is installed in, for example, a fishing boat or a fishing port, and the ice slurry returned to the seawater tank is used for keeping cold fresh fish.
  • an amount of new seawater commensurate with the amount of ice slurry used (consumed) is replenished to the seawater tank by a replenishment pump (not shown).
  • the ice making system A uses seawater as a medium to be cooled, and in addition to the ice making machine 1 that constitutes the use side heat exchanger, a compressor 2, a heat source side heat exchanger 3, a four-way switching valve 4, a use side expansion valve 5, a heat source.
  • a side expansion valve 6, a superheater 7, a receiver 8, a seawater tank (storage tank) 9, and a pump 10 are provided.
  • the ice maker 1, the compressor 2, the heat source side heat exchanger 3, the four-way switching valve 4, the use side expansion valve 5, the heat source side expansion valve 6, the superheater 7, and the receiver 8 constitute a refrigeration apparatus, and these devices are provided.
  • the members are connected by pipes to form a refrigerant circuit.
  • the ice making machine 1, the seawater tank 9, and the pump 10 are also connected by pipes to form a seawater circulation path.
  • the ice making machine 1, the compressor 2, the heat source side heat exchanger 3, the four-way switching valve 4, the use side expansion valve 5, the heat source side expansion valve 6, the superheater 7, the receiver 8 and the like are device side elements.
  • the seawater tank 9, the pump 10, the piping, etc. are the equipment-side elements.
  • the ice making system A includes a control device 30.
  • the control device 30 includes a CPU and memories such as RAM and ROM.
  • the control device 30 realizes various controls relating to the operation of the ice making system A, including the operation control of the present disclosure, by the CPU executing the computer programs stored in the memory.
  • the four-way switching valve 4 is held in the state shown by the solid line in FIG.
  • the high-temperature and high-pressure gaseous refrigerant discharged from the compressor 2 flows through the four-way switching valve 4 into the heat source side heat exchanger 3 which functions as a condenser, and the blower fan 11 operates to exchange heat with the air to condense. Liquefy.
  • the liquefied refrigerant flows into the utilization side expansion valve 5 through the heat source side expansion valve 6 and the receiver 8 in the fully opened state.
  • the refrigerant is depressurized to a predetermined low pressure by the use-side expansion valve 5, and is supplied from an after-mentioned refrigerant inlet pipe into the annular space 14 between the inner pipe 12 and the outer pipe 13 forming the evaporator E of the ice making machine 1. To be done.
  • the refrigerant jetted into the annular space 14 exchanges heat with the seawater that has flowed into the inner pipe 12 by the pump 10 and evaporates.
  • the seawater cooled by the evaporation of the refrigerant flows out from the inner pipe 12 and returns to the seawater tank 8.
  • the refrigerant evaporated and vaporized by the ice maker 1 is sucked into the compressor 2.
  • the compressor 2 malfunctions due to a sudden increase in the pressure inside the compressor cylinder (liquid compression) and a decrease in the viscosity of the refrigerating machine oil.
  • the refrigerant that has left the ice making machine 1 is heated by the superheater 7 and returned to the compressor 2.
  • the superheater 7 is a double pipe type, and the refrigerant that has left the ice making machine 1 is superheated while passing through the space between the inner pipe and the outer pipe of the superheater 7 and returns to the compressor 2.
  • the ice making machine 1 cannot operate. In this case, a defrost operation (heating operation) is performed to melt the ice in the inner pipe 12.
  • the four-way switching valve 4 is held in the state shown by the broken line in FIG.
  • the high-temperature and high-pressure gaseous refrigerant discharged from the compressor 2 flows into the annular space 14 between the inner pipe 12 and the outer pipe 13 of the ice making machine 1 through the four-way switching valve 4, and the ice inside the inner pipe 12 is cooled. Condenses and liquefies by exchanging heat with seawater containing.
  • the liquefied refrigerant flows into the heat-source-side expansion valve 6 through the use-side expansion valve 5 and the receiver 8 in the fully opened state, is depressurized to a predetermined low pressure by the heat-source-side expansion valve 6, and heat-source-side heat exchange that functions as an evaporator Flows into the vessel 3.
  • the refrigerant flowing into the heat source side heat exchanger 3 functioning as an evaporator exchanges heat with air by the operation of the blower fan 11 to be vaporized, and is sucked into the compressor 2.
  • the ice maker 1 includes an evaporator E including an inner pipe 12 and an outer pipe 13, and an ice scraping portion described later, and the inner pipe 12 and the outer pipe 13 are arranged so that their respective axes are horizontal. It is a horizontal double-tube ice machine.
  • the evaporator E is a liquid-filled evaporator in which most of the annular space 14 between the inner pipe 12 and the outer pipe 13 is a liquid refrigerant, and can improve the heat exchange efficiency between the refrigerant and seawater.
  • the annular space 14 as the liquid refrigerant, it is possible to easily discharge the refrigerating machine oil in the full-fill type evaporator from the full-fill type evaporator, and the discharged refrigerating machine oil is compressed. By returning to, the lack of lubrication of the compressor 2 can be suppressed and the reliability can be improved.
  • the inner pipe 12 is an element through which seawater as a medium to be cooled passes, and is made of a metal material such as stainless steel or iron.
  • the inner pipe 12 has a cylindrical shape and is arranged inside the outer pipe 13. Both ends of the inner pipe 12 are closed, and an ice scraping portion 15 for scraping up the sherbet-like ice slurry generated on the inner peripheral surface of the inner pipe 12 and dispersing the ice slurry in the inner pipe 12 is arranged inside the inner pipe 12. It is set up.
  • a seawater inlet pipe 16 for supplying seawater into the inner pipe 12 is provided on one end side (the right side in FIG. 2) of the inner pipe 12 and the other end side (the left side in FIG. 2) of the inner pipe 12 in the axial direction. ) Is provided with a seawater outlet pipe 17 through which seawater is discharged from the inner pipe 12.
  • the outer tube 13 has a cylindrical shape, and like the inner tube 12, is made of a metal material such as stainless steel or iron.
  • a plurality of (three in the illustrated example) refrigerant inlet tubes 18 are provided in the lower part of the outer tube 13, and a plurality (two in the illustrated example) of the refrigerant outlet tubes 19 are provided in the upper part of the outer tube 13. ing.
  • a refrigerant supply port 20 for supplying the refrigerant into the annular space 14 is formed at the upper end of the refrigerant inlet pipe 18, and a refrigerant discharge port 21 for discharging the refrigerant in the annular space 14 is formed at the lower end of the refrigerant outlet pipe 19. .
  • the ice scraping unit 15 includes a rotating shaft 22, a support bar 23, a blade 24, and a motor 26.
  • the other end of the rotary shaft 22 in the axial direction is provided to extend outward from a flange 25 provided at the other end of the inner tube 12 in the axial direction, and is connected to a motor 26 that constitutes a drive unit that drives the rotary shaft 22. ..
  • the motor 26 includes an ammeter 31, and the drive current of the motor 26 detected by the ammeter 31 is transmitted to the control device 30.
  • Support bars 23 are provided upright on the circumferential surface of the rotary shaft 22 at predetermined intervals, and blades 24 are attached to the tips of the support bars 23.
  • the blade 24 is made of, for example, a strip-shaped member made of synthetic resin, and has a tapered side edge on the front side in the rotation direction.
  • the annular space 14 formed between the outer peripheral surface of the inner pipe 12 and the inner peripheral surface of the outer pipe 13 causes the refrigerant supply port 20 formed in the lower portion of the outer pipe 13 to reach the upper portion of the outer pipe 13.
  • a refrigerant path is formed to reach the formed refrigerant outlet 21.
  • FIG. 4 is a diagram showing an example of controlling the evaporation temperature in the operation control method according to the first embodiment.
  • the vertical axis represents the multiplying factor of the evaporation temperature of the refrigerant in the evaporator E and represents the ratio to the normal evaporation temperature described later.
  • the evaporation temperature is set to a normal set temperature t0 (for example, ⁇ 15° C.) until the current value detected by the ammeter 31 is 6A. Then, in the present embodiment, when the current value exceeds 6 A as the first current value, the evaporation temperature of the refrigerant supplied to the evaporator E is raised.
  • the evaporation temperature is set high stepwise according to the excess of the current. For example, if the current value is in the range of more than 6A and 7A or less, the operation is controlled so that the evaporation temperature becomes 0.9 times the normal evaporation temperature t0, and the current value further exceeds 7A and 8A or less. Within the range, the operation is controlled so that the evaporation temperature becomes 0.8 times the normal evaporation temperature t0. In this way, the amount of ice making of the ice making machine 1 is reduced by setting the evaporation temperature higher than the normal value in accordance with the increase of the current value.
  • the forced thermostat when the current value further increases and exceeds the second current value (11A in this example) which is larger than the first current value, the forced thermostat is turned off and the operation of the ice making machine 1 is stopped. That is, the operation of the compressor 2 is stopped and the circulation of the refrigerant in the refrigerant circuit is stopped. The operation of the ice scraping unit 15 is continued even when the forced thermostat is turned off.
  • the forced thermo-off when the current value of the motor 26 drops to a constant value, for example, 9 A, the forced thermo-off is released and the operation of the compressor 2 is restarted.
  • FIG. 5 is a graph illustrating the behavior of the current value when the operation control according to the first embodiment is performed and when the operation control is not performed (prior art).
  • the horizontal axis represents time (t) and the vertical axis represents the current value (A) of the motor 26 of the ice scraping unit 15.
  • the drive current of the motor 26 suddenly increases when the ice filling rate IPF increases with the passage of time and the amount of ice in the inner pipe 12 exceeds a certain amount.
  • the overcurrent protection device operates and the operation of the motor 26 is stopped.
  • the blade 24 of the ice scraping unit 15, the support bar 23, and the like may be damaged.
  • the current value of the motor 26 until the time t1 when the amount of ice in the inner pipe 12 becomes a constant amount is the same as that of the conventional technique. Current value gradually increases. However, as described above, the amount of ice making is reduced by setting the evaporation temperature higher than the normal value in accordance with the increase in the current value, so that the increase in the current value is slower than in the prior art. is there.
  • the operation of the ice making machine 1 is controlled based on the electric current value of the motor 26 of the ice scraping unit 15 of the ice making machine 1 which is an element on the device side. Therefore, the reliability of the operation control of the ice making machine 1 can be improved regardless of the occurrence of a problem such as a communication abnormality with the equipment side as in the related art. This can further reduce the risk of damage to the blade 24 of the ice scraping unit 15 and the support bar 23 due to excessive ice making, and improve the reliability of the ice making system A as a system.
  • the evaporation temperature is raised stepwise in accordance with the excess of the current from the first current value, whereby the ice production of the ice making machine 1 can be restrained stepwise.
  • the pressure of seawater in the seawater inlet pipe 16 and the seawater outlet pipe 17 of the ice making machine 1 is detected by the pressure sensors 32 and 33 (see FIG. 2), respectively, and the pressure sensor 32, 33 causes the control device 30 to operate.
  • the operation value of the ice making machine 1 is controlled by using the pressure value transmitted to the.
  • FIG. 6 is a diagram showing an example of controlling the evaporation temperature in the operation control method according to the second embodiment.
  • the vertical axis is the magnification of the evaporation temperature of the refrigerant in the evaporator E and represents the ratio to the normal evaporation temperature described later.
  • the pressure difference between the pressure of seawater in the seawater inlet pipe 16 detected by the pressure sensor 32 and the pressure of seawater in the seawater outlet pipe 17 detected by the pressure sensor 33 evaporates up to 0.03 MPa.
  • the temperature is set to a normal set temperature t0 (for example, -15°C).
  • the evaporation temperature of the refrigerant supplied to the evaporator E is raised. More specifically, in the present embodiment, the evaporation temperature is set high stepwise according to the excess of the differential pressure. For example, when the differential pressure is in the range of more than 0.03 MPa and 0.04 MPa or less, the operation is controlled so that the evaporation temperature becomes 0.9 times the normal evaporation temperature t0, and the differential pressure is further reduced to 0. When it is in the range of more than 04 MPa and 0.05 MPa or less, the operation is controlled so that the evaporation temperature becomes 0.8 times the normal evaporation temperature t0. In this way, the amount of ice making is reduced by setting the evaporation temperature higher than the normal value in accordance with the increase in the differential pressure.
  • the forced thermostat when the differential pressure further increases and exceeds the second pressure value which is larger than the first pressure value, the forced thermostat is turned off and the operation of the ice making machine 1 is stopped. That is, the operation of the compressor 2 is stopped and the circulation of the refrigerant in the refrigerant circuit is stopped. The operation of the ice scraping unit 15 is continued even when the forced thermostat is turned off. After the forced thermo-off, the forced thermo-off is released when the differential pressure drops to a constant value, for example, 0.06 MPa, and the operation of the compressor 2 is restarted.
  • a constant value for example, 0.06 MPa
  • the ice making machine 1 is based on the pressure difference between the pressure of the seawater (medium to be cooled) in the seawater inlet pipe 16 and the pressure of the seawater in the seawater outlet pipe 17 in the ice making machine 1, which is an element on the equipment side. Control the operation of. Therefore, the reliability of the operation control of the ice making machine 1 can be improved regardless of the occurrence of a problem such as a communication abnormality with the equipment side as in the related art. This can further reduce the risk of damage to the blade 24 of the ice scraping unit 15 and the support bar 23 due to excessive ice making, and improve the reliability of the ice making system A as a system.
  • the evaporation temperature is raised stepwise in accordance with the excess of the differential pressure from the first pressure value, whereby the ice production of the ice making machine 1 can be restrained stepwise. ..
  • the present disclosure is not limited to the embodiments described above, and various modifications can be made within the scope of the claims.
  • the first current value of the motor and the second current value larger than the first current value are 6A and 11A, respectively, but these are merely examples.
  • the present disclosure is not limited to these current values.
  • the first current value and the second current value can be appropriately selected based on the scale of the ice scraping unit, the characteristics of the motor, and the like.
  • the first pressure value and the second pressure value larger than the first pressure value are 0.03 MPa and 0.08 MPa, respectively.
  • the present disclosure is not limited to these pressure values.
  • the first pressure value and the second pressure value can be appropriately selected based on the scale of the ice scraping unit, the characteristics of the pump, and the like.
  • thermo-off when the current value of the motor drops to 9 A, the forced thermo-off is released and the operation of the compressor is restarted.
  • the selection is not limited, and can be appropriately selected based on the scale of the ice scraping unit, the characteristics of the motor, and the like.
  • second embodiment when the differential pressure at the inlet/outlet of the ice making machine decreases to 0.06 MPa, the forced thermo-off is released and the compressor operation is restarted.
  • the differential pressure is not limited to this, and can be appropriately selected based on the scale of the ice scraping unit, the characteristics of the pump, and the like.
  • the evaporation temperature is raised stepwise according to the excess of the current or the differential pressure, but it is also possible to raise the evaporation temperature linearly according to the excess. Further, in the above-described embodiment, the evaporation temperature is raised stepwise according to the excess of the current or the differential pressure. However, when the current or the differential pressure exceeds the first current value or the first pressure value, It is also possible to raise the evaporation temperature by a preset temperature.
  • the pressure sensor 32 for detecting the seawater pressure at the inlet of the ice making machine 1 is provided in the seawater inlet pipe 16, but this pressure sensor 32 is provided in the evaporator E. It suffices if the pressure of seawater before heat exchange with the refrigerant can be detected, and for example, it can be provided at a location S1 (inside the inner pipe 12) indicated by a two-dot chain line in FIG. The same applies to the pressure sensor 33 that detects the seawater pressure at the outlet of the ice maker 1, and the pressure sensor 33 may be provided, for example, at a location S2 (inside the inner pipe 12) indicated by a two-dot chain line in FIG. it can.
  • evaporator E a liquid-filled evaporator in which most of the annular space 14 between the inner pipe 12 and the outer pipe 13 is a liquid refrigerant has been exemplified. It is also possible to use an evaporator of the type in which the refrigerant is jetted by a nozzle into the annular space 14 between the outer tube 13 and the outer tube 13.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Production, Working, Storing, Or Distribution Of Ice (AREA)

Abstract

L'invention concerne un procédé de commande de fonctionnement pour une machine à glaçons (1) qui génère de la glace par refroidissement d'un milieu à refroidir par échange de chaleur avec un fluide frigorigène. Lorsque le courant d'entraînement d'une unité de raclage de glace (15) incluse dans la machine à glaçons (1) dépasse une première valeur de courant, la température d'évaporation du fluide frigorigène fourni à la machine à glaçons (1) est augmentée.
PCT/JP2019/033661 2018-12-27 2019-08-28 Procédé de commande de fonctionnement pour machine à glaçons WO2020136997A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US17/417,816 US20220057130A1 (en) 2018-12-27 2019-08-28 Method for controlling operation of ice-making machine
EP19902266.6A EP3904789B1 (fr) 2018-12-27 2019-08-28 Procédé de commande de fonctionnement pour machine à glaçons
CN201980085900.1A CN113227681A (zh) 2018-12-27 2019-08-28 制冰机的运转控制方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2018-245322 2018-12-27
JP2018245322A JP6760361B2 (ja) 2018-12-27 2018-12-27 製氷機の運転制御方法

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WO2020136997A1 true WO2020136997A1 (fr) 2020-07-02

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EP (1) EP3904789B1 (fr)
JP (1) JP6760361B2 (fr)
CN (1) CN113227681A (fr)
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CN113227681A (zh) 2021-08-06
JP6760361B2 (ja) 2020-09-23
EP3904789B1 (fr) 2023-04-26
US20220057130A1 (en) 2022-02-24
EP3904789A1 (fr) 2021-11-03
JP2020106212A (ja) 2020-07-09
EP3904789A4 (fr) 2022-03-09

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