WO2012043229A1 - Dispositif de commande pour appareil frigorifique - Google Patents

Dispositif de commande pour appareil frigorifique Download PDF

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Publication number
WO2012043229A1
WO2012043229A1 PCT/JP2011/070948 JP2011070948W WO2012043229A1 WO 2012043229 A1 WO2012043229 A1 WO 2012043229A1 JP 2011070948 W JP2011070948 W JP 2011070948W WO 2012043229 A1 WO2012043229 A1 WO 2012043229A1
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WO
WIPO (PCT)
Prior art keywords
temperature
showcase
control unit
low pressure
time
Prior art date
Application number
PCT/JP2011/070948
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English (en)
Japanese (ja)
Inventor
木村　幸嗣
員史 西川
淳 大内
Original Assignee
三洋電機株式会社
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Publication of WO2012043229A1 publication Critical patent/WO2012043229A1/fr

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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
    • 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
    • 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
    • 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
    • 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
    • F25B49/027—Condenser 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
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B5/00—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity
    • F25B5/02—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity arranged in parallel
    • 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
    • F25B2400/07—Details of compressors or related parts
    • F25B2400/075—Details of compressors or related parts with parallel compressors
    • 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
    • F25B2600/01—Timing
    • 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
    • F25B2600/026—Compressor control by controlling unloaders
    • F25B2600/0261—Compressor control by controlling unloaders external to the compressor
    • 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
    • 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
    • F25B2600/2511—Evaporator distribution valves
    • 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
    • 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
    • F25B2700/195—Pressures of the condenser
    • 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
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2700/00—Means for sensing or measuring; Sensors therefor
    • F25D2700/12—Sensors measuring the inside temperature
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Definitions

  • the present invention relates to a control device for refrigeration equipment that controls refrigeration equipment, and more particularly to a control device for refrigeration equipment including an ice regenerator.
  • a cooling system including a showcase installed in a store such as a supermarket and a cooling device such as a refrigerator connected to the showcase is known.
  • These refrigeration systems generally constitute a refrigeration cycle in which a refrigerant circulates by connecting a compressor, a condenser, an evaporator, and the like in a circular manner by refrigerant piping or the like.
  • control of the operation and stop of these compressors, condensers, showcases and other refrigeration equipment is performed by adjusting the pressure of the refrigerant obtained from the sensor connected to the input / output port of each equipment, the cold air discharge temperature of the showcase, etc. This is done by transmitting control data to the refrigeration equipment based on the physical characteristics.
  • This control data is generally set to be suitable for situations where the most cooling capacity is required in the summer, and the cooling capacity tends to be excessive in the winter season when high cooling capacity is not required. It was in.
  • the present invention has been made in view of such circumstances, and an object of the present invention is to provide a control device that stabilizes the cooling capacity of the refrigeration equipment including the ice heat storage section.
  • a certain aspect of the present invention is a control device for a cooling device including an ice regenerator.
  • This apparatus includes a control unit that controls the operation capacity of the refrigeration equipment by changing control data set in the refrigeration equipment.
  • the control unit makes the operating capacity of the refrigeration equipment higher than that at the time.
  • the cooling system 100 suppresses insufficient cooling of the showcase and the like by increasing the cooling capacity of the cooling system in advance before the ice making operation of the ice heat storage unit at night or the like.
  • FIG. 1 is a diagram schematically showing the configuration of the cooling system 100.
  • the refrigeration system 100 includes a condenser 10, a showcase 20, a refrigerator 18, a showcase controller 32, a condenser controller 34, a compressor controller 36, a refrigerant pipe 16, an integrated controller 30, and an ice heat storage unit 42.
  • the showcase 20 further includes a first solenoid valve 24a and a second solenoid valve 24b collectively referred to as an electromagnetic valve 24, a first expansion valve 26a and a second expansion valve 26b collectively referred to as an expansion valve 26, a discharge temperature.
  • the ice heat storage unit 42 includes an ice heat storage unit 44, a third electromagnetic valve 24c, a third expansion valve 26c, a first temperature sensor 39a on the refrigerant pipe, and a second temperature sensor 39b on the refrigerant pipe.
  • the third solenoid valve 24c and the third expansion valve 26c are collectively referred to as the solenoid valve 24 and the expansion valve 26 of the showcase 20, respectively, and the first temperature sensor 39a on the medium pipe and the refrigerant pipe on the refrigerant pipe.
  • the second temperature sensor 39b is collectively referred to as the temperature sensor 39 on the refrigerant pipe.
  • the refrigerator 18 further includes a first compressor 14a, a second compressor 14b, and a third compressor 14c, which are collectively referred to as the compressor 14, and a first unloader 22a, a second compressor, which are collectively referred to as an unloader 22.
  • An unloader 22b, a third unloader 23c, and a low pressure sensor 40 are included.
  • cooling equipment devices constituting a refrigeration cycle in which a compressor, a condenser, an evaporator, and the like are annularly connected by a refrigerant pipe or the like to circulate the refrigerant may be collectively referred to as “cooling equipment”.
  • the refrigeration equipment includes equipment having a refrigerant circuit such as refrigeration equipment, refrigeration equipment, and air conditioning equipment.
  • the cooling system 100 is installed in a store such as a supermarket.
  • an integrated controller 30 to be described later monitors and controls the operation of the refrigeration system, thereby comprehensively controlling the refrigeration system 100. Therefore, the integrated controller 30 operates as a control device that controls the cooling system 100.
  • a refrigerant circulation circuit is configured by connecting a cooling device such as the compressor 14, the condenser 10, and the showcase 20 and the ice regenerator 44 through the refrigerant pipe 16.
  • the high-temperature and high-pressure refrigerant compressed by the compressor 14 releases heat in the condenser 10 and condenses.
  • the condensed refrigerant is vaporized in the expansion valve 26 in response to opening and closing of the electromagnetic valve 24, it takes away the amount of heat such as ambient air as heat of vaporization.
  • the cooled air is blown out from the discharge unit (not shown) as cold air to cool the inside of the showcase 20.
  • the discharge temperature sensor 38 detects the temperature of the cold air blown from the discharge unit.
  • the refrigerant that has passed through the expansion valve 26 becomes a low-temperature and low-pressure gas.
  • the low pressure sensor 40 detects the refrigerant pressure at this time.
  • the compressor 14 compresses the low-temperature and low-pressure refrigerant to bring the refrigerant into a high-temperature and high-pressure state.
  • a refrigeration cycle is configured by repeating the above.
  • the unloader 22 has a function of reducing the pressure of the refrigerant compressed by the compressor 14.
  • a compressor controller 36, a condenser controller 34, and a showcase controller 32 are connected to the compressor 14, the condenser 10, and the showcase 20 by a control signal transmission line, respectively, and their operations are controlled.
  • the compressor controller 36, the condenser controller 34, and the showcase controller 32 are further connected to the integrated controller 30.
  • the integrated controller 30 controls the operations of the cooling system 100 as a whole by controlling the operations of the compressor controller 36, the condenser controller 34, and the showcase controller 32.
  • the showcase controller 32 is based on the deviation temperature between the actual cold air temperature detected by the discharge temperature sensor 38 and the set temperature of the cold air set as an appropriate value as the temperature of the discharged cold air. Is controlled to open and close and the refrigerant is supplied to the evaporator 28 to cool the inside of the showcase cabinet. Specifically, an upper limit temperature higher than the set temperature is set, and when the temperature in the showcase chamber reaches the upper limit temperature, the solenoid valve 24 is opened and the solenoid valve is closed at the set temperature. To do. Thereby, the discharge temperature of cold air is brought close to the set temperature.
  • the integrated controller 30 sets the cold air set temperature in the showcase controller 32.
  • the condenser controller 34 is an appropriate value as the pressure of the refrigerant immediately after the outlet of the condenser detected by a pressure sensor (not shown) provided in the condenser 10 and the pressure of the refrigerant exiting the condenser set from the integrated controller 30.
  • the rotational speed of the fan of the condenser (not shown) is changed based on the deviation pressure from the pressure set as (hereinafter referred to as “high pressure set value”).
  • the fan speed is increased to cool the refrigerant, and if the pressure detected by the sensor is lower than the high pressure set value, the fan The cooling speed of the refrigerant is lowered to lower the cooling capacity of the refrigerant, and the detected pressure and the pressure set value are brought closer to each other.
  • the operating capacity of the compressor 14 is controlled by the compressor controller 36 at a predetermined cycle based on the low pressure set value.
  • the predetermined cycle is a control cycle determined as a cycle in which the compressor controller 36 controls the operation capability of the compressor 14 based on the low pressure set value, and is, for example, 1 second.
  • the “low pressure set value” is a reference value for changing the operation capacity of the compressor, and specifically includes two threshold values of “cut-in value” and “cut-out value”.
  • the operation of the compressor is restarted when the refrigerant pressure acquired by the low-pressure sensor 40 is equal to or higher than the “cut-in value”, and the operation of the compressor is stopped when the pressure is equal to or lower than the “cut-out value”.
  • the compressor controller 36 controls the operation capability of the compressor 14 according to the low pressure set value.
  • the low pressure set value is variably set by the integrated controller 30 according to the temperature state in the showcase cabinet.
  • the ice heat storage unit 42 has two operation states of a heat storage operation and a heat dissipation operation.
  • FIG. 1 shows a refrigeration circuit during heat storage.
  • the ice heat storage unit 42 stores ice in the ice heat storage unit 44 by the heat of vaporization of the low-temperature refrigerant that has passed through the third expansion valve 26c during the heat storage operation.
  • the ice heat storage unit 42 uses a refrigerant pipe (not shown) in a heat exchange unit (not shown) connected between the condenser 10 and the showcase 20 using an antifreeze liquid pipe (not shown) during a heat radiation operation.
  • the refrigerant in 16 is cooled. Thereby, the cooling efficiency of the showcase 20 is improved.
  • the ice heat storage unit 42 performs a heat storage operation during a low power cost time period such as at night (for example, from 9:30 pm to 7:30 am on the next day), and dissipates heat during other time periods. Thereby, while suppressing the peak value of the electric power use in the daytime, the power cost can also be suppressed.
  • FIG. 2 is a diagram schematically illustrating a functional configuration of the integrated controller 30 according to the embodiment.
  • the integrated controller 30 includes a control unit 46, a database 48, and an acquisition unit 50.
  • the database 48 stores the operation schedule of the ice heat storage unit 42.
  • the cool air stored in the ice regenerator 44 is radiated from 7:30 am to 9:30 pm, from 9:30 pm to 7:30 am on the next day, The ice regenerator 44 stores heat.
  • the control unit 46 sets the control data set by the refrigeration equipment administrator via the acquisition unit 50 in the refrigeration equipment such as the showcase controller 32, the condenser controller 34, or the compressor controller 36. Control the operating capacity of refrigeration equipment. When no control data is input from the manager of the refrigeration equipment, standard control data stored in advance in the database 48 is set in the refrigeration equipment.
  • FIG. 2 shows a functional configuration for realizing the integrated controller 30 according to the embodiment, and other configurations are omitted.
  • each element described as a functional block for performing various processes can be configured by a CPU (Central Processing Unit), main memory, and other LSI (Large Scale Integration) in hardware.
  • CPU Central Processing Unit
  • main memory main memory
  • LSI Large Scale Integration
  • software it is realized by a program loaded in the main memory. Therefore, it is understood by those skilled in the art that these functional blocks can be realized in various forms by hardware only, software only, or a combination thereof, and is not limited to any one.
  • control unit 46 Details of the control by the control unit 46 will be described with reference to the drawings.
  • FIG. 3 is a diagram exemplifying a temperature transition 52 in the store of the showcase 20, a set temperature 54 in the store of the showcase 20, a change 56 in the low pressure set value, and a lower limit 58 of the low pressure set value.
  • the ice heat storage unit 42 radiates the ice regenerator 44 from the ice making end time T1 (7:30 am) to the ice making start time T2 (9:30 pm), and the other time.
  • the belt stores heat in the ice regenerator 44.
  • the internal temperature of the showcase 20 is stable because the ice regenerator 44 is not making ice. Further, during this period, heat is dissipated from the ice heat storage, and the inside of the showcase 20 is sufficiently cooled together with the refrigerant supplied from the refrigerator. Thereby, the integrated controller 30 determines that the inside of the showcase 20 is sufficiently cooled, and the low pressure set value is set high. As a result, the low-pressure set value is slightly changed, but its behavior is stable.
  • the refrigerant circulating in the refrigerant pipe 16 also has a cooling capacity sufficient to keep the temperature in the cabinet of the showcase 20 stable.
  • the ice heat storage unit 42 starts ice making.
  • the refrigerant circulating in the refrigerant pipe 16 may only have a cooling capacity necessary for maintaining the set temperature 54 in the storage of the showcase 20. Therefore, in such a case, when the ice heat storage unit 42 starts making ice, the cold air is used for heat exchange with the ice heat storage device 44, and therefore, a refrigerant having a temperature necessary to maintain the temperature in the cabinet of the showcase 20 Is not supplied, and the internal temperature rises rapidly. This makes it impossible to keep the temperature inside the showcase 20 stable.
  • the showcase controller 32 notifies the integrated controller 30 when the temperature in the cabinet of the showcase 20 rises.
  • the integrated controller 30 instructs the compressor controller 36 to lower the low pressure set value to the low pressure set lower limit value of the refrigerator 18 in order to lower the temperature inside the showcase 20.
  • the “low pressure setting lower limit value” is the lowest value among the low pressure setting values that can be set for the refrigerator.
  • the temperature inside the showcase 20 it takes time for the temperature inside the showcase 20 to change after the low-pressure set value of the refrigerator 18 is lowered, and the rise in the temperature inside the showcase 20 does not stop immediately. For this reason, the temperature in the cabinet of the showcase 20 continues to be higher than the set temperature 54. As the refrigerator 18 operates at a high rate, the temperature inside the storage case of the showcase 20 eventually becomes a normal state that settles near the set temperature 54 and then stabilizes.
  • the ice heat storage unit existing on the refrigerant pipe 16 other than the showcase 20 is changed.
  • the refrigeration equipment such as 42 starts operating, the temperature inside the showcase 20 is affected.
  • the low pressure set value of the refrigerator 18 is lowered after the temperature in the storehouse of the showcase 20 rises, the temperature in the storecase of the showcase 20 falls into a state higher than the set temperature 54. It is difficult to prevent.
  • the control unit 46 performs control so that the operating capacity of the refrigeration equipment after that time is higher than the operating capacity of the refrigeration equipment at that time after the predetermined time before the ice regenerator 44 starts to store heat. To do. More specifically, the control unit 46 sets the set temperature 54 after that time at a time before the ice heat accumulator 44 starts to store heat lower than the set temperature 54 at that time.
  • the “predetermined time” is a preparatory period for increasing the operation capacity of the refrigeration equipment in advance in anticipation of additional operation of the refrigeration equipment, and is, for example, 3 hours 30 minutes.
  • the predetermined time is stored in the database 48 in advance. The initial value for the predetermined time can be arbitrarily set by the administrator.
  • FIG. 4 is a diagram illustrating an example of a temperature transition 52 in the showcase 20 and a set temperature 54 in the showcase 20.
  • the set temperature 54 in the cabinet of the showcase 20 is set low at a preparation start time T3 that is a time before the ice making start time T2 of the ice heat storage section 42, and preparation for ice making is started.
  • T3 preparation start time
  • T2 preparation start time
  • the control unit 46 acquires the ice making start time T2 of the ice heat storage unit 42 from the operation schedule of the ice heat storage unit 42 acquired from the database 48.
  • the control unit 46 also obtains a preparation period for increasing the operation capacity of the refrigeration equipment from the database 48, and determines a time period during which the interior of the showcase 20 is supercooled.
  • the control unit 46 obtains the time from a timer (not shown), obtains the temperature set to supercool the interior of the showcase 20 when the preparation start time T3 is reached, and the showcase controller 32. Set to.
  • the temperature set to supercool the inside of the showcase 20 is a temperature lower than the set inside temperature before the preparation start time T3.
  • the control unit 46 sets the set temperature during the supercooling control state to 0 degrees.
  • This temperature may be acquired from the administrator of the refrigeration equipment via the acquisition unit 50, or a value stored in the database 48 in advance may be acquired.
  • the temperature in the cabinet of the showcase 20 is in a supercooled state. For this reason, even if the temperature in the storehouse of the showcase 20 rises when the ice heat storage unit 42 starts to store heat, the temperature in the storecase of the showcase 20 before the start of heat storage is in a supercooled state, so the normal state Lower temperature is maintained. Therefore, the temperature in the cabinet of the showcase 20 can be kept low for a period required for the compressor controller 36 to increase the cooling capacity of the entire refrigeration equipment by lowering the low pressure set value of the refrigerator 18.
  • the set temperature 54 is restored. This may be returned to the supercooled temperature at once, or may be returned in multiple times (for example, divided into 5 times and raised 5 times in total).
  • FIG. 5 is a diagram illustrating an example of the temperature transition 52 in the showcase 20 and the set temperature 54 in the showcase 20.
  • FIG. 5 shows that, after the preparation start time T3, after the ice making start time T2 at which the ice heat storage unit 42 starts to store heat even though the control unit 46 has lowered the set temperature 54 in the showcase 20 chamber, An example in which the temperature inside the case 20 has risen and the inside has become a high temperature state is shown.
  • the database 48 includes the temperature transition 52 in the storage of the showcase 20 acquired via the discharge temperature sensor 38 in the supercooled state and the period immediately after the ice heat storage operation (for example, 1 hour),
  • the preset temperature 54 is stored in association with each other.
  • the temperature data is not stored in the database 48 during the defrosting operation and until the showcase 20 returns to the normal cooling state immediately after the defrosting operation.
  • the control unit 46 refers to the database 48 based on the set temperature 54 acquired from the administrator via the acquiring unit 50, acquires the past temperature transition in the warehouse at the set temperature 54, and indicates the temperature transition.
  • the temperature exceeds a predetermined temperature
  • the temperature is corrected and set to a temperature lower than the set temperature 54 acquired by the acquisition unit 50.
  • the “predetermined temperature” is a temperature at which the showcase 20 is appropriately cooled in order to store a product or the like stored in the cabinet, and is a temperature that varies depending on what is stored.
  • the control unit 46 sets a longer preparatory period for increasing the operating capacity of the refrigeration equipment instead of or in addition to setting the set temperature 54 to a lower temperature. Thereby, even when a sufficient effect cannot be obtained due to the change of the set temperature, the integrated controller 30 can prevent the internal temperature of the showcase 20 from rising more than necessary by resetting the next set temperature. it can.
  • the control unit 46 also refers to the database 48 based on the set temperature 54 acquired from the administrator via the acquisition unit 50, acquires the past temperature transition in the warehouse at the set temperature 54, and When the temperature shown is equal to or lower than the predetermined temperature, the temperature is corrected and set to a temperature higher than the set temperature 54 acquired by the acquisition unit 50. Instead of setting the set temperature 54 to a higher temperature, or in addition to that, the control unit 46 sets a short preparation period for increasing the operating capability of the cooling equipment. Thereby, cost, such as electric power required in order to make the inside of the store
  • FIG. 7 is a flowchart for explaining the processing flow of the integrated controller 30 according to the embodiment. The processing in this flowchart starts when the integrated controller 30 is activated.
  • the control unit 46 waits without special processing before the preparation start time T3 (N in S1). When the preparation start time T3 is reached (Y in S1), the control unit 46 obtains a temperature that is set to bring the interior of the showcase 20 into a supercooled state (S2).
  • the control unit 46 refers to the database 48 based on the acquired set temperature, and acquires a history of temperature transitions in the past at the set temperature (S3).
  • the set temperature needs to be corrected, for example, when the acquired temperature transition exceeds a predetermined temperature (Y in S4), the control unit 46 corrects the set temperature (S5).
  • the control unit 46 does not correct the set temperature.
  • the control unit 46 sets a preset temperature lower than the preset temperature before the preparation start time T3 by setting the preset temperature in the showcase controller 32 (S6). Until the ice making start time T2 is reached (N in S7), the set temperature is lower than the set temperature before the preparation start time T3, and the inside of the showcase 20 is supercooled. When the ice making start time T2 is reached (Y in S7), the control unit 46 returns the set temperature to the set temperature before the preparation start time T3 (S8).
  • the control unit 46 lowers the set temperature in the storage of the showcase 20 when the preparation start time T3 for bringing the inside of the storage of the showcase 20 into a supercooled state, and puts the inside of the storage into a supercooled state. Thereafter, after the ice making start time T2, the set temperature in the showcase 20 is restored.
  • the cooling capacity of the refrigeration equipment including the ice heat storage section can be stabilized.
  • control data is the low pressure of the refrigerant circulating in the cooling system 100. It may be a set value. This case will be described below.
  • FIG. 8 is a diagram showing another example of the temperature transition 52 in the showcase store, the set temperature 54 in the showcase store, the change 56 in the low pressure set value, and the lower limit 58 of the low pressure set value.
  • the control unit 46 instructs the compressor controller 36 to lower the low pressure set value of the refrigerator 18 to the lower limit 58 of the low pressure set value at a time T4 immediately before the ice making start time T2 (for example, 10 minutes before). Instruct.
  • the refrigerant necessary for the ice making operation by the ice heat storage unit 42 and maintaining the temperature in the showcase 20 after the ice making start time T2 is prepared.
  • the temperature transition 52 in the showcase 20 acquired via the discharge temperature sensor 38 in the database 48 and the low pressure at that time are obtained.
  • the control unit 46 refers to the database 48 based on the low pressure setting value acquired from the administrator via the acquisition unit 50, acquires the past temperature transition in the warehouse at the low pressure setting value, and indicates the temperature transition When the temperature is higher than a predetermined temperature, it may be corrected and set to a low pressure set value lower than the low pressure set value acquired by the acquisition unit 50.
  • control unit 46 acquires the temperature transition in the past warehouse at the low pressure set value by referring to the database 48 based on the low pressure set value acquired from the administrator via the acquisition unit 50, and the temperature When the temperature indicated by the transition is equal to or lower than the predetermined temperature, the temperature may be corrected and set to a temperature higher than the low pressure set value acquired by the acquisition unit 50.
  • control unit 46 has described the case where the ice making start time T2 and the preparation start time T3 are acquired by referring to the database 48.
  • the administrator uses a user interface such as a controller (not shown).
  • the control unit 46 may be notified. Thereby, the ice making schedule of the ice heat storage unit 42 can be flexibly changed.
  • control unit 46 may determine when the ice heat storage unit 42 is radiating heat or storing heat from the information of the temperature sensor 39 on the refrigerant pipe installed in the ice heat storage unit 42. Thereby, since the ice making start time T2 of the ice heat storage unit 42 can be automatically determined, it is possible to automatically take measures such as rapidly reducing the low pressure set value of the refrigerator 18 to the lower limit 58 of the low pressure set value. .
  • the ice making start time T ⁇ b> 2 may be automatically acquired via a communication device (not shown) attached to the ice heat storage unit 42.
  • the preparation start time T3 is determined with the ice making start time T2 as a starting point.
  • the preparation start time T3 is determined and the preparation is started, and the temperature in the cabinet of the showcase 20 is the target at the time of overcooling.
  • the ice heat storage unit 42 may start heat storage by ice making. In this case, it is advantageous in that the interior of the showcase 20 can be surely brought into a supercooled state.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)

Abstract

La présente invention concerne un dispositif de commande stabilisant la capacité de réfrigération d'un appareil frigorifique comportant une unité de stockage thermique de la glace. L'invention concerne plus particulièrement un dispositif de commande d'appareil frigorifique comprenant, d'une part une unité de stockage thermique de la glace, qui stocke de l'air froid en fabricant de la glace, et d'autre part une unité de commande (46), qui commande les possibilités fonctionnelles de l'appareil frigorifique en modifiant les données de commande qui sont définies pour l'appareil frigorifique. À un instant prédéterminé avant le début du stockage de chaleur par l'unité de stockage thermique de la glace, l'unité de commande (46) établit, après l'instant considéré, les possibilités fonctionnelles de l'appareil frigorifique à une valeur supérieure aux possibilités fonctionnelles de l'appareil frigorifique à l'instant considéré.
PCT/JP2011/070948 2010-09-30 2011-09-14 Dispositif de commande pour appareil frigorifique WO2012043229A1 (fr)

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JP2010-221082 2010-09-30
JP2010221082A JP2013253706A (ja) 2010-09-30 2010-09-30 冷設機器の制御装置

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WO2012043229A1 true WO2012043229A1 (fr) 2012-04-05

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016073281A1 (fr) 2014-11-07 2016-05-12 Emerson Climate Technologies, Inc. Régulation de pression de tête

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220268504A1 (en) * 2021-02-23 2022-08-25 True Manufacturing Co., Ltd. Ice maker

Citations (7)

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Publication number Priority date Publication date Assignee Title
JPH01244255A (ja) * 1988-03-23 1989-09-28 Daikin Ind Ltd 蓄熱式空気調和装置
JPH07318184A (ja) * 1994-05-23 1995-12-08 Matsushita Electric Ind Co Ltd 空気調和機
JPH0960929A (ja) * 1995-08-22 1997-03-04 Hitachi Ltd 氷蓄熱装置
JPH10122608A (ja) * 1996-10-15 1998-05-15 Nakano Refrigerators Co Ltd 冷凍・冷蔵設備の氷蓄熱装置とその制御方法
JPH11281275A (ja) * 1998-03-27 1999-10-15 Sanyo Electric Co Ltd 氷蓄熱システム
JP2001124419A (ja) * 1999-10-26 2001-05-11 Mitsubishi Electric Corp 蓄熱式冷却装置
JP2010071599A (ja) * 2008-09-22 2010-04-02 Sanyo Electric Co Ltd 氷蓄熱システム

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01244255A (ja) * 1988-03-23 1989-09-28 Daikin Ind Ltd 蓄熱式空気調和装置
JPH07318184A (ja) * 1994-05-23 1995-12-08 Matsushita Electric Ind Co Ltd 空気調和機
JPH0960929A (ja) * 1995-08-22 1997-03-04 Hitachi Ltd 氷蓄熱装置
JPH10122608A (ja) * 1996-10-15 1998-05-15 Nakano Refrigerators Co Ltd 冷凍・冷蔵設備の氷蓄熱装置とその制御方法
JPH11281275A (ja) * 1998-03-27 1999-10-15 Sanyo Electric Co Ltd 氷蓄熱システム
JP2001124419A (ja) * 1999-10-26 2001-05-11 Mitsubishi Electric Corp 蓄熱式冷却装置
JP2010071599A (ja) * 2008-09-22 2010-04-02 Sanyo Electric Co Ltd 氷蓄熱システム

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016073281A1 (fr) 2014-11-07 2016-05-12 Emerson Climate Technologies, Inc. Régulation de pression de tête
EP3227620A4 (fr) * 2014-11-07 2018-08-29 Emerson Climate Technologies, Inc. Régulation de pression de tête

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