WO2023287031A1 - Réfrigérateur et procédé de commande de fonctionnement s'y rapportant - Google Patents

Réfrigérateur et procédé de commande de fonctionnement s'y rapportant Download PDF

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Publication number
WO2023287031A1
WO2023287031A1 PCT/KR2022/008420 KR2022008420W WO2023287031A1 WO 2023287031 A1 WO2023287031 A1 WO 2023287031A1 KR 2022008420 W KR2022008420 W KR 2022008420W WO 2023287031 A1 WO2023287031 A1 WO 2023287031A1
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WO
WIPO (PCT)
Prior art keywords
evaporator
refrigerant
storage compartment
cooling
temperature
Prior art date
Application number
PCT/KR2022/008420
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English (en)
Korean (ko)
Inventor
김호산
Original Assignee
엘지전자 주식회사
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Publication of WO2023287031A1 publication Critical patent/WO2023287031A1/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
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
    • F25D21/06—Removing frost
    • 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
    • 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
    • F25B41/37—Capillary tubes
    • 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
    • F25B41/40—Fluid line 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
    • F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
    • F25B47/02—Defrosting cycles
    • 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
    • F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
    • F25B47/02—Defrosting cycles
    • F25B47/022—Defrosting cycles hot gas defrosting
    • 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
    • F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
    • F25D11/02—Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures
    • 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
    • F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
    • F25D11/02—Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures
    • F25D11/022—Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures with two or more evaporators
    • 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
    • F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
    • 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
    • F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
    • F25D21/002—Defroster control
    • F25D21/004—Control mechanisms
    • 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
    • F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
    • F25D21/06—Removing frost
    • F25D21/08—Removing frost by electric heating
    • 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
    • F25B2400/0409—Refrigeration circuit bypassing means for the 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
    • F25B2500/00—Problems to be solved
    • F25B2500/28—Means for preventing liquid refrigerant entering into 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
    • F25B2600/02—Compressor control
    • F25B2600/025—Compressor control by controlling speed
    • F25B2600/0251—Compressor control by controlling speed with on-off operation
    • 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
    • F25B2600/11—Fan speed control
    • F25B2600/112—Fan speed control of evaporator 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
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/21—Temperatures
    • F25B2700/2104—Temperatures of an indoor room or compartment

Definitions

  • the present invention relates to a refrigerator configured to selectively provide heat to three or more evaporators using a hot gas flow path and an operation control method thereof.
  • a refrigerator is a home appliance provided to store various foods for a long time with cool air generated by using circulation of a refrigerant according to a refrigerating cycle.
  • one or a plurality of storage compartments for storing storage objects are partitioned from each other and provided.
  • the storage chamber receives cold air generated by a refrigeration system including a compressor, a condenser, an expander, and an evaporator, and is maintained within a set temperature range.
  • a refrigerator in which a single compressor selectively supplies refrigerant to a plurality of evaporators has a problem in that a defrost operation for each evaporator takes a long time.
  • defrosting of another evaporator is also performed during an operation for defrosting one evaporator, power consumption is inevitably high due to frequent defrosting operations.
  • each evaporator of the refrigerator has a defrosting structure using a heater, uniform defrosting is not performed, and more heat is required than necessary, causing problems such as increased power consumption and deterioration of stored food due to an increase in temperature in the refrigerator. .
  • the high-temperature refrigerant compressed by the compressor flows into the evaporator for the freezer compartment without passing through the expander for the freezer compartment, so that the evaporator for the freezer compartment can be defrosted.
  • the refrigerant passing through the freezing compartment evaporator sequentially passes through the refrigerating compartment expander and the refrigerating compartment evaporator, and then cools the refrigerating compartment evaporator while being returned to the compressor. Because of this, it is possible to cool the refrigerating compartment during defrosting of the evaporator for the freezing compartment, and thus the temperature of the refrigerating compartment can be prevented from rising due to the defrosting operation of the evaporator for the freezing compartment.
  • the prior art 5 or 6 described above has a problem in that the refrigerating compartment is excessively cooled during defrosting of the evaporator for the freezing compartment.
  • prior art 5 or prior art 6 has a disadvantage in that it takes longer to defrost than a method using a heating heat source as much as power consumption is reduced.
  • the refrigerant flowing directly through the condenser into the evaporator of the other storage compartment and the refrigerant flowing into the evaporator of the other storage compartment after passing through the condenser and one evaporator have different pressures and temperatures. For this reason, a difference in heat exchange performance due to a difference in decompression in the process of passing through the same expander inevitably occurs, and even if it passes through the evaporator, a state in which it is not completely vaporized occurs, resulting in poor operation of the compressor or damage to the compressor.
  • the present invention was made to solve various problems according to the prior art described above.
  • One object of the present invention is to adjust the physical properties of a refrigerant flowing to another evaporator after heating an evaporator during an operation of providing heat to one evaporator to suit the characteristics of another evaporator. In this way, compression defects caused in the process of being returned to the compressor after passing through the evaporator and being recompressed can be prevented.
  • Another object of the present invention is to solve the problem of excessive cooling of the third storage compartment while allowing the second evaporator to be sufficiently defrosted while the second evaporator is being defrosted.
  • Another object of the present invention is to prevent overcooling of the third storage compartment during the second heat exchange operation even when the room temperature is in the low temperature range that can affect the temperature of the refrigerating compartment.
  • a first storage compartment cooled with air cooled by passing through the first evaporator
  • a second storage compartment cooled with air cooled by passing through the second evaporator
  • cooled air passing through the third evaporator It may be configured to include a third storage chamber cooled by.
  • a first cooling passage branching from the outlet passage of the condenser and guiding the refrigerant to pass through the first expander and the first evaporator may be included.
  • a second cooling passage branching from the outlet passage of the condenser and guiding the refrigerant to pass through the second expander and passing through the second evaporator may be included.
  • a third cooling passage branching from the outlet passage of the condenser and guiding the refrigerant to pass through the third expander and the third evaporator may be included.
  • a first hot gas flow path branched from any one cooling flow path and guiding the refrigerant to sequentially pass through the first evaporator and the second evaporator may be included.
  • a second hot gas flow path branched from any one cooling flow path and guiding the refrigerant to sequentially pass through the second evaporator and the third evaporator may be included.
  • a first passage switching valve may be provided at a portion branched from the outlet passage of the condenser to the first cooling passage, the second cooling passage, and the third cooling passage and switch the flow of the refrigerant.
  • a second flow path switching valve may be provided at a portion branched from any one cooling flow path into the first hot gas flow path and the second hot gas flow path and switch the flow of the refrigerant.
  • the first hot gas flow path may be provided with a first property control unit for adjusting the property of the refrigerant passing through the first evaporator and flowing into the second evaporator.
  • a second property control unit may be provided in the second hot gas passage to adjust the property of the refrigerant passing through the second evaporator and flowing into the third evaporator.
  • the first cooling passage may be formed such that the refrigerant passing through the first evaporator passes through the second evaporator without passing through the second expander.
  • the first physical property control unit may be formed to provide flow resistance different from that of the second expander.
  • the second property control unit may be formed to provide flow resistance different from that of the third expander.
  • the first hot gas flow path may be formed so that the refrigerant passing through the first evaporator does not pass through the second expander but passes through the first physical property controller and then passes through the second evaporator.
  • the second hot gas flow path may be formed so that the refrigerant passing through the second evaporator does not pass through the third expander, but passes through the second property control unit and then passes through the third evaporator.
  • the first storage compartment can be maintained at the same or higher temperature than the second storage compartment.
  • the first storage compartment can be maintained at a lower temperature than the third storage compartment.
  • the first storage compartment and the second storage compartment may be set to be maintained at a freezing temperature
  • the third storage compartment may be set to be maintained at a refrigerating temperature
  • the first heat exchanger heats the first evaporator with the refrigerant flowing along the first hot gas flow path and cools the second evaporator while passing through the second evaporator in a state in which physical properties are adjusted. Driving may be involved.
  • the second heat exchanger heats the second evaporator with the refrigerant flowing along the second hot gas flow path, and then cools the third evaporator while passing through the third evaporator in a state in which physical properties are adjusted. Driving may be involved.
  • a first heating process of supplying heat to the first evaporator may be performed while the first heating heat source generates heat during the first heat exchange operation.
  • a second heating process of supplying heat to the second evaporator may be performed while the second heating heat source generates heat during the second heat exchange operation.
  • the second heat generation process may be performed prior to the second heat exchange operation.
  • the second heating process may end when the second evaporator reaches the second set temperature.
  • the second heat exchange operation may end when the second evaporator reaches the second set temperature.
  • the second heat exchange operation may be terminated when the third storage compartment reaches the lower limit reference temperature (NT3-Diff) set based on the set reference temperature (NT3).
  • the cooling fan may be controlled to stop during at least one heat exchange operation among each heat exchange operation.
  • the operation control method of the refrigerator according to the present invention configured as described above provides the following effects.
  • a physical property control unit is provided in each hot gas flow path. Accordingly, the refrigerant heated in one evaporator along the hot gas flow path is provided to the other evaporator after its physical properties are adjusted to suit the characteristics of the other evaporator. Accordingly, compression failure of the refrigerant or damage to the compressor caused by the process of being returned to the compressor after passing through the corresponding evaporator and being recompressed can be prevented.
  • the second evaporator operates to provide heat in consideration of the temperature of the third storage compartment. Accordingly, while the second evaporator can be smoothly defrosted, the problem of excessive cooling of the third storage compartment is solved.
  • each heat exchange operation is performed in consideration of the temperature of the storage compartment to be cooled even when the room temperature is in the low temperature range that can affect the temperature of the refrigerator compartment. Accordingly, overcooling of each storage compartment can be prevented.
  • FIG. 1 is a state diagram showing the front appearance of a refrigerator according to an embodiment of the present invention.
  • FIG. 2 is a state diagram showing the internal structure of a refrigerator according to an embodiment of the present invention.
  • FIG. 3 is a state diagram showing a refrigeration system including a hot gas flow path of a refrigerator according to an embodiment of the present invention.
  • FIG. 4 is a perspective view showing a state in which a hot gas flow path and a heating source are installed in a first evaporator of a refrigerator according to an embodiment of the present invention
  • FIG. 5 is a side view showing a state in which a hot gas flow path and a heating source are installed in a first evaporator of a refrigerator according to an embodiment of the present invention
  • FIG. 6 is a flowchart showing a control process during a first cooling operation of a refrigerator according to an embodiment of the present invention.
  • FIG. 7 is a state diagram of a refrigeration system showing a flow of refrigerant during a first cooling operation of a refrigerator according to an embodiment of the present invention
  • FIG. 8 is a flowchart illustrating a control process during a second cooling operation of a refrigerator according to an embodiment of the present invention.
  • FIG. 9 is a state diagram of a refrigeration system showing a flow of refrigerant during a second cooling operation of a refrigerator according to an embodiment of the present invention.
  • FIG. 10 is a flowchart illustrating a control process during a third cooling operation of a refrigerator according to an embodiment of the present invention.
  • FIG. 11 is a state diagram of a refrigeration system showing a flow of refrigerant during a third cooling operation of a refrigerator according to an embodiment of the present invention.
  • FIG. 12 is a flowchart illustrating a control process during a first heat exchange operation of a refrigerator according to an embodiment of the present invention.
  • FIG. 13 is a state diagram of a refrigeration system showing a flow of refrigerant during a first heat exchange operation of a refrigerator according to an embodiment of the present invention
  • FIG. 14 is a flowchart illustrating a control process during a second heat exchange operation of a refrigerator according to an embodiment of the present invention.
  • 15 is a state diagram of a refrigeration system showing a flow of refrigerant during a second heat exchange operation of a refrigerator according to an embodiment of the present invention.
  • the present invention is a refrigerator and an operation control method thereof configured to perform a cooling operation or a heat exchange operation while selectively supplying refrigerant to three or more evaporators with one compressor.
  • FIGS. 1 to 15 A preferred embodiment of the refrigerator and its operation control method of the present invention will be described with reference to FIGS. 1 to 15 attached.
  • each direction mentioned in the description of the installation position of each component takes an installation state in actual use (the same state as in the illustrated embodiment) as an example.
  • FIG. 1 is a state diagram showing a front appearance of a refrigerator according to an embodiment of the present invention
  • FIG. 2 is a state diagram showing an internal structure of a refrigerator according to an embodiment of the present invention.
  • a refrigerator according to an embodiment of the present invention has a refrigerator body 100 providing at least one or more storage compartments.
  • the storage compartment may include a first storage compartment 101, a second storage compartment 102, and a third storage compartment 103 as a storage space for storing stored goods.
  • the first storage compartment 101, the second storage compartment 102, and the third storage compartment 103 can be opened and closed by the first door 110, the second door 120, and the third door 130, respectively.
  • the three storage compartments may be simultaneously opened and closed with one door, or each storage compartment 101 , 102 , and 103 may be partially opened and closed with two or more doors.
  • two third doors 130 opening and closing the third storage compartment 103 may be provided.
  • Each of the storage compartments 101, 102, and 103 is operated to maintain the set reference temperatures NT1, NT2, and NT3 during each cooling operation.
  • the set reference temperatures NT1, NT2, and NT3 of each of the storage compartments 101, 102, and 103 may be set to the same temperature or different temperatures.
  • the third storage compartment 103 may be set to be maintained at a refrigerating temperature.
  • the first storage compartment 101 and the second storage compartment 102 may be used as a freezing compartment, and the third storage compartment 103 may be used as a refrigerating compartment.
  • the first storage compartment 101 and the second storage compartment 102 may be maintained at a lower temperature than the third storage compartment 103 .
  • the first storage compartment 101 may be set to be maintained at a temperature different from that of the second storage compartment 102 or set to be maintained at the same temperature.
  • the set reference temperatures NT1, NT2, and NT3 may be set by a user.
  • arbitrarily designated temperatures are used as the set reference temperatures (NT1, NT2, NT3).
  • each of the storage chambers 101, 102, and 103 described above has an upper limit reference temperature (NT1+Diff, NT2+Diff, NT3+Diff) of the set reference temperature (NT1, NT2, NT3) or a lower limit reference temperature (NT1-Diff, NT2- Depending on Diff,NT3-Diff), cold air is supplied or stopped.
  • each of the storage compartments 101, 102, and 103 exceeds the upper limit reference temperatures (NT1+Diff, NT2+Diff, and NT3+Diff) during each cooling operation, cold air is supplied to the corresponding storage compartments 101, 102, and 103.
  • the temperatures of the storage compartments 101, 102, and 103 are lower than the lower limit reference temperatures (NT1-Diff, NT2-Diff, NT3-Diff)
  • the supply of cold air is stopped.
  • each of the storage compartments 101, 102, and 103 can be maintained at the respective set reference temperatures NT1, NT2, and NT3.
  • reference numeral 281 denotes a first grill assembly that guides the flow of cold air into the first storage compartment.
  • Reference numeral 282 denotes a second grill assembly that guides the flow of cold air into the second storage compartment.
  • Reference numeral 283 denotes a third grill assembly that guides the flow of cold air into the third storage compartment.
  • the refrigerator main body 100 or each of the grill assemblies may include a temperature sensor for measuring the internal temperature of each storage compartment 101, 102, and 103 or a temperature sensor (not shown) for measuring the indoor temperature.
  • a refrigerator according to an embodiment of the present invention has a refrigeration system.
  • the refrigeration system supplies cold air capable of maintaining each of the storage compartments 101 , 102 , and 103 at set reference temperatures NT1 , NT2 , and NT3 .
  • the refrigeration system may include a compressor (Comp) 210.
  • Comp compressor
  • the compressor 210 compresses the refrigerant.
  • the compressor 210 may be located in the refrigerator body 100 .
  • the compressor 210 may be located in the machine room 104 in the refrigerator body 100 .
  • a recovery passage 211 may be connected to the compressor 210 .
  • the recovery passage 211 guides the suction flow of the refrigerant recovered to the compressor 210 .
  • the recovery passage 211 may be formed of a pipe.
  • the recovery passage 211 may be formed to recover refrigerant that has passed through each of the evaporators 251 and 252 and then provide the refrigerant to the compressor 210 .
  • two or more recovery passages 211 may be provided in plurality and connected individually or in plurality to each passage.
  • the refrigeration system may include a condenser 220 .
  • the condenser 220 condenses the refrigerant compressed in the compressor 210 .
  • the condenser 220 may be located within the refrigerator body 100 .
  • the condenser 220 may be located in the machine room 104 in the refrigerator body 100 .
  • a cooling fan (C-Fan) 221 may be provided inside the machine room 104 where the condenser 220 is located. By driving the cooling fan 221 , indoor air may exchange heat with the refrigerant passing through the condenser 220 .
  • An outlet passage 222 is connected to the outlet side of the refrigerant of the condenser 220 , and the refrigerant passing through the condenser 220 flows out to the outlet passage 222 .
  • the refrigeration system is provided with an expander.
  • the expander may include at least one of a first expander 231 , a second expander 232 , and a third expander 233 .
  • the expander includes all of the first expander 231, the second expander 232, and the third expander 233.
  • the first expander 231 , the second expander 232 , and the third expander 233 depressurize the refrigerant condensed in the condenser 220 . Accordingly, the refrigerant passing through each of the expanders 231, 232, and 233 is expanded.
  • the first expander 231 , the second expander 232 , and the third expander 233 are connected to receive refrigerant from the outlet passage 222 .
  • the first expander 231 depressurizes the refrigerant flowing into the first evaporator 251 after passing through the condenser 220 .
  • the second expander 232 depressurizes the refrigerant flowing into the second evaporator 252 after passing through the condenser 220 .
  • the third expander 233 depressurizes the refrigerant flowing into the third evaporator 253 after passing through the condenser 220 .
  • the refrigeration system may include a first evaporator 251 .
  • the refrigerant reduced in pressure in the first expander 231 passes through the first evaporator 251 .
  • the first evaporator 251 may exchange heat with the air in the first storage compartment 101 flowing by the driving of the F1-Fan 281a for the first storage compartment.
  • the first evaporator 251 may be located behind the first storage chamber 101 .
  • the refrigeration system may include a second evaporator 252 .
  • the refrigerant depressurized by the second expander 232 passes through the second evaporator 252 .
  • the second evaporator 252 may exchange heat with the air in the second storage compartment 102 flowing by the driving of the F2-Fan 282a for the second storage compartment.
  • the second evaporator 252 may be located behind the second storage chamber 102 .
  • the refrigeration system may include a third evaporator 253.
  • the refrigerant depressurized by the third expander 233 passes through the third evaporator 253 .
  • the third evaporator 253 may exchange heat with the air in the third storage compartment 103 flowing by the driving of the R-Fan 283a for the third storage compartment.
  • the third evaporator 253 may be located behind the third storage chamber 103 .
  • the refrigeration system may include a first cooling passage (F1-Path) 201 .
  • the first cooling passage 201 is branched from the outlet passage 222 and is provided to guide the flow of refrigerant recovered to the compressor 210 through the first expander 231 and the first evaporator 251 . That is, the first cooling passage 201 may be a refrigerant flow path for cooling operation of the first storage chamber 101 .
  • the first cooling passage 201 may be formed such that the refrigerant passing through the first evaporator 251 is returned to the compressor 210 after passing through the second evaporator 252 .
  • the first cooling passage 201 may pass through the second evaporator 252 without passing through the second expander 232 .
  • the refrigeration system may include a second cooling path (F2-Path) 202 .
  • the second cooling passage 202 is branched from the outlet passage 222 and is provided to guide the flow of refrigerant recovered to the compressor 210 through the second expander 232 and the second evaporator 252 . That is, the second cooling passage 202 may be a refrigerant flow path for cooling operation of the second storage chamber 102 .
  • the second cooling passage 202 may be connected to a conduit through which a flow of refrigerant is guided to the second evaporator 252 via the first evaporator 251 .
  • a check valve (not shown) for preventing the refrigerant from flowing back may be installed at a connection portion of a conduit through which the flow of refrigerant is guided from the second cooling passage 202 to the second evaporator 252 via the first evaporator. there is.
  • the refrigeration system may include a third cooling path (R-Path) 203 .
  • the third cooling passage 203 is branched from the outlet passage 222 and is provided to guide the flow of refrigerant recovered to the compressor 210 through the third expander 233 and the third evaporator 253. That is, the third cooling passage 203 may be a refrigerant flow path for the cooling operation of the third storage compartment 103 .
  • the refrigeration system may include a first hot gas path (H1-Path) 321 .
  • the first hot gas passage 321 may be formed to provide high-temperature heat to a place where heat is needed.
  • the first hot gas passage 321 may be formed to guide the high-temperature refrigerant (hot gas) compressed by the compressor 210 . That is, the refrigerant guided by the first hot gas flow path 321 provides heat.
  • the first hot gas passage 321 is branched from at least one of the cooling passages 201, 202, and 203 so that the refrigerant supplied from the outlet passage 222 does not pass through the first expander 231 and the first evaporator 251 It can be formed to pass through.
  • the first hot gas flow path 321 is formed so that the high-temperature refrigerant compressed by the compressor 210 passes through the condenser 220 and then passes through the first evaporator 251 to heat the corresponding first evaporator 251. It can be.
  • the first hot gas passage 321 may be formed such that the refrigerant passing through the first evaporator 251 additionally passes through the second evaporator 252 .
  • the first hot gas passage 321 may be formed so as not to pass through the second expander 232 . This is shown in the attached Figure 13.
  • the refrigeration system may include a second hot gas path (H2-Path) 322 .
  • H2-Path second hot gas path
  • the second hot gas passage 322 is branched from at least one of the cooling passages 201 , 202 , and 203 so that the refrigerant supplied from the outlet passage 222 does not pass through the second expander 232 and passes through the second evaporator 252 . It can be formed to pass through.
  • the second hot gas flow path 322 is formed so that the high-temperature refrigerant compressed by the compressor 210 passes through the condenser 220 and then passes through the second evaporator 252 to heat the corresponding second evaporator 252. It can be.
  • the second hot gas passage 322 may be formed such that the refrigerant passing through the second evaporator 252 additionally passes through the third evaporator 253 . At this time, the second hot gas passage 322 may be formed so as not to pass through the third expander 233 . This is the same as the attached figure 15.
  • the refrigeration system may include a first physical property controller 271 .
  • the first property control unit 271 provides resistance to the flow of the refrigerant flowing into the second evaporator 252 after passing through the first evaporator 251 under the guidance of the first hot gas flow path 321 . That is, resistance is provided to the flow of the refrigerant so that the physical properties of the refrigerant are adjusted (changed).
  • the physical properties of the refrigerant may include any one of temperature, flow rate, and flow rate of the refrigerant.
  • the first property control unit 271 is formed as a conduit through which the refrigerant can flow.
  • the first property control unit 271 may be connected to the first hot gas flow path 321 . That is, while the refrigerant condensed and liquefied while passing through the first evaporator 251 passes through the first physical property controller 271, its physical properties are adjusted. Thus, the refrigerant can be easily exchanged in the second evaporator 252 . In addition, problems affecting the operation reliability of the compressor 210 due to excessive liquefaction of the refrigerant recovered to the compressor 210 after passing through the second evaporator 252 can be prevented.
  • the first property control unit 271 may be formed to provide different flow resistance from that of the second expander 232 .
  • the resistance may be designed in consideration of the passage length of the first property control unit 271, the pressure in the passage, and the density of the refrigerant in the passage. For example, the resistance may be adjusted by changing at least one factor among the length of the flow path, the pressure within the flow path, and the density of the refrigerant within the flow path of the first property control unit 271 .
  • the refrigerant flowing into the second evaporator 252 along the second hot gas passage 322 may be reduced by the first physical property controller 271 .
  • the first physical property controller 271 may be formed to have a different diameter or a different length from that of the second expander 232 .
  • the first property control unit 271 may have the same diameter as the second expander 232 but may have a different length. That is, the lengths of the first property control unit 271 and the second expander 232 may be formed to be different so that the physical properties of each other may be different. For example, the first physical property adjusting unit 271 may be shorter than the second expander 232 . In this case, since the first property control unit 271 and the second expander 232 have the same diameter, they have the advantage that they can be used in common.
  • the first property control unit 271 may be formed to have the same length as the second expander 232 but have different pipe diameters.
  • the first property control unit 271 may have a larger pipe diameter than the second expander 232 .
  • the refrigeration system may include a second property control unit 272 .
  • the second property control unit 272 is formed to provide resistance to the flow of the refrigerant.
  • the refrigerant flows into the third evaporator 253 after passing through the second evaporator 252 under the guidance of the second hot gas flow path 322 . That is, resistance is provided to the flow of the refrigerant so that the physical properties of the refrigerant are adjusted (changed).
  • the physical properties of the refrigerant may include any one of temperature, flow rate, and flow rate of the refrigerant.
  • the second property control unit 272 may be connected to the second hot gas flow path 322 while being formed as a conduit through which the refrigerant flows.
  • the second property control unit 272 may be formed to provide a flow resistance different from that of the third expander 233 .
  • the resistance may be designed in consideration of at least one of the passage length of the second property control unit 272, the pressure in the passage, and the density of the refrigerant in the passage. That is, the resistance may be adjusted by changing at least one of the flow path length, the pressure within the flow path, and the density of the refrigerant within the flow path of the second property control unit 272 .
  • the refrigerant flowing to the third evaporator 253 along the second hot gas passage 322 and the third evaporator 253 along the third cooling passage 203 due to the design change of the second property control unit 272 it is possible to reduce the difference in physical properties of the refrigerant that flows.
  • the second property control unit 272 may have the same diameter as the third expander 233 but may have a different length.
  • the lengths of the second property control unit 272 and the third expander 233 may be formed to be different so that the physical properties of each other may be different.
  • the second property control unit 272 may be shorter than the third expander 233 .
  • the second property control unit 272 may be formed to have the same length as the third expander 233 but have different pipe diameters.
  • the second property control unit 272 may have a larger pipe diameter than the third expander 233 .
  • the refrigeration system may include a first flow path conversion valve 331.
  • the first flow passage switching valve 331 is opened so that the refrigerant introduced from the outlet passage 222 is supplied to at least one of the cooling passages 201, 202, and 203, or the refrigerant is not supplied to at least one of the cooling passages 201, 202, and 203. You can block it from happening.
  • the first passage switching valve 331 may be installed at a connection between the outlet passage 222, the first cooling passage 201, the second cooling passage 202, and the third cooling passage 203.
  • the refrigeration system may include a second flow path conversion valve 332 .
  • the second flow path switching valve 332 is opened so that the refrigerant introduced from the outlet flow path 222 is supplied to at least one hot gas flow path 321 and 322, or the refrigerant flows into at least one hot gas flow path 321 and 322. supply can be blocked.
  • the second flow path switching valve 332 may be installed at a portion branched from any one cooling flow path through the outlet flow path 222 to the first hot gas flow path 321 and the second hot gas flow path 322.
  • Any one of the cooling passages may be, for example, the first cooling passage 201 .
  • the refrigerator according to the embodiment of the present invention may further include heating heat sources 311 and 312 .
  • the heating heat sources 311 and 312 are heat sources that provide high-temperature heat together with the respective hot gas passages 321 and 322 .
  • the heat provided by the heating heat sources 311 and 312 or the hot gas passages 321 and 322 may be used in various ways.
  • heat provided by the heating heat sources 311 and 312 or heat provided by the first hot gas flow path 321 may be used to defrost the first evaporator 251 .
  • heat provided by the second hot gas flow path 322 may be used.
  • the heating heat sources 311 and 312 may be formed of a sheath heater (Sheath HTR) that generates heat by power supply.
  • Sheath HTR sheath heater
  • the heating heat sources 311 and 312 may include a first heating heat source 311 for heating the first evaporator 251 and a second heating heat source 312 for heating the second evaporator 252 .
  • Each of the heating heat sources 311 and 312 may be provided at an adjacent part of the first evaporator 251 and the second evaporator 252 .
  • each of the heating heat sources 311 and 312 when the first evaporator 251 or the second evaporator 252 is installed in an upright state, each of the heating heat sources 311 and 312 is connected to the first evaporator 251 or , may be located at the lower part of the second evaporator 252.
  • each of the heating heat sources 311 and 312 may be spaced apart from the lowermost heat exchange fins 251a and 252a of the first evaporator 251 or the second evaporator 252 .
  • a heating heat source may be additionally provided to the third evaporator 253 .
  • a separate heating heat source is not required because it is maintained at a temperature at which frost does not occur much. That is, frosting of the third evaporator 253 can be prevented or defrosted by blowing the air in the third storage compartment to the third evaporator 253 .
  • the operation for each situation is performed by a controller (not shown) provided for operation of the refrigerator.
  • a controller not shown
  • the operation for each situation is a control means on a network connected by wired or wireless communication (eg, a home network, an online service server, etc.) ) can also be performed.
  • the operation of the refrigerator for each situation may include a cooling operation (S100).
  • This cooling operation (S100) is performed in the first storage compartment 101, the second storage compartment 102, and the third storage compartment 103 based on the set reference temperatures (NT1, NT2, and NT3) for each storage compartment 101, 102, and 103. That is, based on the set reference temperature (NT1, NT2, NT3) for each storage room (101, 102, 103), the upper limit reference temperature (NT1+Diff, NT2+Diff, NT3+Diff) and the lower limit reference temperature (NT1-Diff, NT2-Diff, Cooling operation (S100) is performed by supplying cold air (S111, S121, S131) or stopping supplying cold air (S112, S122, S132) according to NT3-Diff.
  • the compressor 210 of the refrigeration system and the blowing fan 281a for the first storage compartment are operated.
  • the first flow path switching valve 331 is operated so that the refrigerant flows through the first cooling flow path 201.
  • the second flow path switching valve 332 operates to block the first hot gas flow path 321 and the second hot gas flow path 322.
  • the refrigerant compressed by the operation of the compressor 210 is condensed while passing through the condenser 220 . While the condensed refrigerant flows along the first cooling passage 201 and passes through the first expander 231, it is reduced in pressure and expanded. The expanded refrigerant passes through the first evaporator 251, exchanges heat with air flowing around it, and is returned to the compressor 210 to be compressed. The refrigerant that has passed through the first evaporator 252 is returned to the compressor 210 after additionally passing through the second evaporator 252, or the refrigerant that has passed through the first evaporator 252 is transferred to the second evaporator ( 252 and may be returned directly to compressor 210.
  • the blowing fan 281a for the first storage compartment is operated.
  • the air in the first storage compartment 101 passes through the first evaporator 251 and is supplied into the first storage compartment 101, repeating a circulation operation.
  • the air exchanges heat with the first evaporator 251 and is supplied into the first storage compartment 101 at a lower temperature to lower the temperature F1 in the first storage compartment 101 .
  • the compressor 210 of the refrigeration system and the blowing fan 282a for the second storage compartment are operated.
  • the first flow path switching valve 331 is operated so that the refrigerant flows through the second cooling flow path 202.
  • the second flow path switching valve 332 operates to block the first hot gas flow path 321 and the second hot gas flow path 322.
  • the refrigerant compressed by the operation of the compressor 210 is condensed while passing through the condenser 220 .
  • the condensed refrigerant is reduced in pressure and expanded while passing through the second expander 232 while flowing along the second cooling passage 202 .
  • the expanded refrigerant passes through the second evaporator 252, exchanges heat with air flowing around the refrigerant, flows into the compressor 210, and repeats a circular operation in which it is compressed.
  • the blowing fan 282a for the second storage compartment is operated.
  • the air in the second storage compartment 102 passes through the second evaporator 252 and is supplied into the second storage compartment 102, repeating a circulation operation.
  • the air exchanges heat with the second evaporator 252 and is supplied into the second storage compartment 102 at a lower temperature to lower the second storage compartment temperature F2.
  • the compressor 210 and the blowing fan 283a for the third storage compartment are operated.
  • the first flow path switching valve 331 is operated so that the refrigerant flows through the third cooling flow path 203.
  • the second flow path switching valve 332 operates to block the first hot gas flow path 321 and the second hot gas flow path 322.
  • the refrigerant compressed by the operation of the compressor 210 is condensed while passing through the condenser 220 .
  • the condensed refrigerant is reduced in pressure and expanded while passing through the third expander 233 while flowing along the third cooling passage 203 .
  • the expanded refrigerant passes through the third evaporator 253, exchanges heat with air flowing around the refrigerant, flows into the compressor 210, and repeats a circular operation in which it is compressed.
  • the blowing fan 283a for the third storage compartment is operated.
  • the air in the third storage compartment 103 passes through the third evaporator 253 and is supplied into the third storage compartment 103, repeating a circulation operation.
  • the air exchanges heat with the third evaporator 253 and is supplied into the third storage compartment 103 at a lower temperature to lower the temperature R of the third storage compartment.
  • the internal temperatures (F1, F2, R) of the first storage chamber 101, the second storage chamber 102, and the third storage chamber 103 together are higher than the dissatisfied temperatures (NT1+Diff, NT2+Diff, NT3+Diff). high temperature), it may be operated so that cold air is preferentially supplied to one storage compartment and then operated to supply cold air to another storage compartment.
  • cold air is preferentially supplied to the third storage compartment 103 to satisfy the temperature (upper limit reference temperature (NT1 + Diff, NT2 + Diff, NT3 + Diff) and lower limit reference temperature (NT1-Diff, NT2-Diff, NT3-Diff)
  • the third storage compartment 103 is a storage compartment maintained at room temperature, so the stored goods stored in the corresponding storage compartment 103 may be sensitive to temperature changes. Accordingly, when two or more storage chambers including the third storage chamber are at an unsatisfactory temperature at the same time, it is preferable to first perform the cooling operation from the third storage chamber 103 and then perform the cooling operation of the other storage chamber.
  • operation of the refrigerator for each situation may include a first heat exchange operation (S150).
  • the first heat exchange operation (S150) is an operation for providing heat to the first evaporator 251 while the cooling operation (S100) is being performed.
  • the first heat exchange operation (S150) may be performed to defrost the first evaporator 251.
  • the first heat exchange operation (S150) may be performed when the operating conditions are satisfied.
  • the operating condition may be determined to be satisfied when an operation to cool the second storage compartment 102 while heating the first storage compartment 101 is required.
  • the temperature of each storage compartment is checked (S151) to check whether the start condition of the first heat exchange operation is satisfied.
  • the refrigerator temperature F2 of the second storage compartment 102 is higher than the set reference temperature NT2 and the refrigerator temperature F1 of the first storage compartment 101 is lower than the set reference temperature NT1. In this case, it may be determined that the start condition of the first heat exchange operation (S150) is satisfied.
  • the first heat exchange operation starts (S153).
  • the compressor 210 When the first heat exchange operation starts, the compressor 210 is operated.
  • the first flow path switching valve 331 operates to cut off the supply of refrigerant to the respective cooling flow paths 201, 202, and 203.
  • the second flow path switching valve 332 When the first heat exchange operation starts, the second flow path switching valve 332 is operated so that the first hot gas flow path 321 is opened. Even if the first heat exchange operation starts, the cooling fan 221 is controlled not to operate.
  • the refrigerant compressed by the operation of the compressor 210 is not condensed in the process of passing through the condenser 220, flows along the first hot gas flow path 321, and then passes through the first evaporator 251.
  • the first evaporator 251 is heated.
  • the refrigerant that has passed through the first evaporator 251 flows into the second evaporator 252 after its physical properties are adjusted in the first physical property controller 271 .
  • the refrigerant flowing into the second evaporator 252 passes through the second evaporator 252 and then flows into the compressor 210 to be compressed, repeating a circular operation.
  • the blowing fan 282a for the second storage compartment may be operated.
  • the air cooled while passing through the second evaporator 102 is provided to the second storage compartment 102 to lower the temperature F2 in the second storage compartment 102 . That is, while the first evaporator 251 is heated by the first heat exchange operation, the temperature of the second storage chamber 102 gradually decreases.
  • a first heating process of providing heat to the first evaporator 251 while generating heat from the first heating heat source 311 may be performed.
  • the first evaporator 251 can shorten the time required to reach a desired temperature (eg, defrost completion temperature) by providing additional heat generated by the first heating heat source 311 .
  • the first heating source 311 may be controlled to generate heat (S152) when the second evaporator temperature FD2 is higher than the second storage compartment temperature F2.
  • the second storage compartment 102 reaches the lower limit reference temperature (NT2-Diff) to achieve a satisfactory temperature, or the first storage compartment 101 reaches the upper limit reference temperature (NT1+diff) to achieve a dissatisfied temperature.
  • the first heat exchange operation ends.
  • the first heating source 311 stops generating heat when the temperature FD1 of the first evaporator 251 reaches the set first set temperature X1 (S154).
  • the second heat exchange operation (S160) may be included in the operation of the refrigerator for each situation.
  • the second heat exchange operation (S160) is an operation for providing heat to the second evaporator 252 while the cooling operation (S100) is being performed.
  • the second heat exchange operation (S160) may be performed to defrost the second evaporator 252.
  • the second heat exchange operation (S160) checks the temperature of each storage compartment (S161) so that the temperature of the third storage compartment 103 is higher than the set reference temperature (NT3) and the internal temperature of the second storage compartment 102 (F2) If is lower than the set reference temperature (NT2), it can be determined that the starting condition is satisfied.
  • the third storage compartment 103 has a temperature higher than the upper limit reference temperature (NT3+Diff) and the refrigerator internal temperature (F2) of the second storage compartment 102 is lower than the lower limit reference temperature (NT2-Diff), It may be determined that the start condition of the second heat exchange operation is satisfied.
  • the compressor 210 when the second heat exchange operation starts, the compressor 210 is operated.
  • the first flow path switching valve 331 When the second heat exchange operation starts, the first flow path switching valve 331 is operated to cut off the refrigerant supply to the respective cooling flow paths 201, 202, and 203.
  • the second flow path switching valve 332 When the second heat exchange operation starts, the second flow path switching valve 332 operates to open the second hot gas flow path 322 . Even if the second heat exchange operation starts, the cooling fan 221 is controlled not to operate.
  • the refrigerant compressed by the operation of the compressor 210 is not condensed while passing through the condenser 220, flows along the second hot gas flow path 322, and then passes through the second evaporator 252.
  • the second evaporator 252 is heated.
  • the refrigerant that has passed through the second evaporator 252 flows into the third evaporator 253 after its physical properties are adjusted in the second physical property controller 272 .
  • the refrigerant passes through the third evaporator 253, flows into the compressor 210, and repeats a circular operation in which it is compressed.
  • the blowing fan 283a for the third storage compartment may be operated.
  • the air cooled while passing through the third evaporator 253 is provided to the third storage compartment 103 to lower the temperature F3 in the third storage compartment 103 . That is, while the second evaporator 252 is heated by the second heat exchange operation, the temperature of the third storage chamber 103 gradually decreases.
  • a second heat generation process may be performed in which heat is supplied to the second evaporator 252 while the second heating heat source 312 generates heat. That is, the second evaporator 252 can shorten the time required to reach a desired temperature (eg, defrost completion temperature) by providing additional heat generated by the second heating heat source 312 .
  • the second heating source 312 may be controlled to generate heat (S152) when the second evaporator temperature FD2 is higher than the second storage compartment temperature F2.
  • the second heating process is controlled to take precedence over the second heat exchange operation when the room temperature (RT) is within the temperature range within the second storage compartment 102 or below during the normal cooling operation (S100).
  • S100 normal cooling operation
  • the room temperature (RT) is low, the room temperature (RT) is low until the refrigerant passing through the second evaporator 252 through the condenser 220 after being compressed in the compressor 210 is sufficiently repetitively circulated.
  • the third storage compartment 103 reaches the lower limit reference temperature (NT3-Diff) to achieve a satisfactory temperature, or the second storage compartment 102 reaches the upper limit reference temperature (NT2+diff) to achieve an unsatisfactory temperature
  • the second heat exchange operation may end.
  • the second heating source 312 is operated to stop generating heat (S164) when the temperature FD2 of the second evaporator 252 reaches the set second set temperature X2.
  • physical property control units 271 and 272 are provided in each hot gas flow path 321 and 322. Accordingly, the refrigerant heated in one of the evaporators 251 and 252 along the hot gas passages 321 and 322 is supplied to the other evaporator 252 and 253 after the physical properties are adjusted to suit the characteristics of the other evaporator 252 and 253. Accordingly, compression failure of the refrigerant or damage to the compressor caused in the process of being returned to the compressor 210 after passing through the corresponding evaporators 252 and 253 and being recompressed can be prevented.
  • operation for providing heat of the second evaporator 253 is controlled in consideration of the temperature of the third storage compartment 103 . Accordingly, while the second evaporator 253 can be smoothly defrosted, the problem of excessive cooling of the third storage chamber 103 is solved.
  • each heat exchange operation is performed in consideration of the temperature of the storage compartments 101, 102, and 103 to be cooled, even when the room temperature is in a low temperature range that can affect the temperature of the refrigerator compartment. Accordingly, overcooling of each of the storage compartments 101, 102, and 103 can be prevented.

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

Abstract

Les objectifs d'un réfrigérateur et un procédé de commande de fonctionnement s'y rapportant, de la présente invention, visent à, simultanément, fournir au moins trois voies de refroidissement et au moins deux voies de gaz chaud et empêcher un refroidissement excessif de l'une des chambres de stockage, généré lorsque de la chaleur est fournie à au moins un évaporateur parmi au moins trois évaporateurs au moyen des voies de gaz chaud.
PCT/KR2022/008420 2021-07-12 2022-06-14 Réfrigérateur et procédé de commande de fonctionnement s'y rapportant WO2023287031A1 (fr)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007071438A (ja) * 2005-09-06 2007-03-22 Denso Corp 冷凍車用の冷凍サイクル装置
JP2013019598A (ja) * 2011-07-12 2013-01-31 Hitachi Appliances Inc 冷蔵庫
KR101573538B1 (ko) * 2009-02-11 2015-12-02 엘지전자 주식회사 냉장고 제어방법
KR20170013767A (ko) * 2015-07-28 2017-02-07 엘지전자 주식회사 냉장고
KR20190070778A (ko) * 2017-12-13 2019-06-21 엘지전자 주식회사 냉장고

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20100034442A (ko) 2008-09-24 2010-04-01 엘지전자 주식회사 냉장고의 제어 방법
KR102359300B1 (ko) 2015-07-28 2022-02-08 엘지전자 주식회사 냉장고

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007071438A (ja) * 2005-09-06 2007-03-22 Denso Corp 冷凍車用の冷凍サイクル装置
KR101573538B1 (ko) * 2009-02-11 2015-12-02 엘지전자 주식회사 냉장고 제어방법
JP2013019598A (ja) * 2011-07-12 2013-01-31 Hitachi Appliances Inc 冷蔵庫
KR20170013767A (ko) * 2015-07-28 2017-02-07 엘지전자 주식회사 냉장고
KR20190070778A (ko) * 2017-12-13 2019-06-21 엘지전자 주식회사 냉장고

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