WO2023287037A1 - Procédé de commande de fonctionnement de réfrigérateur - Google Patents

Procédé de commande de fonctionnement de réfrigérateur Download PDF

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Publication number
WO2023287037A1
WO2023287037A1 PCT/KR2022/008432 KR2022008432W WO2023287037A1 WO 2023287037 A1 WO2023287037 A1 WO 2023287037A1 KR 2022008432 W KR2022008432 W KR 2022008432W WO 2023287037 A1 WO2023287037 A1 WO 2023287037A1
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WO
WIPO (PCT)
Prior art keywords
storage compartment
heat
temperature
evaporator
refrigerator
Prior art date
Application number
PCT/KR2022/008432
Other languages
English (en)
Korean (ko)
Inventor
김호산
Original Assignee
엘지전자 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from KR1020210090871A external-priority patent/KR20230010387A/ko
Priority claimed from KR1020210090864A external-priority patent/KR20230010380A/ko
Application filed by 엘지전자 주식회사 filed Critical 엘지전자 주식회사
Publication of WO2023287037A1 publication Critical patent/WO2023287037A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • 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
    • 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
    • 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
    • F25D21/06—Removing frost
    • F25D21/08—Removing frost by electric heating

Definitions

  • the present invention relates to a method for controlling the operation of a refrigerator that provides heat to an evaporator using a heating heat source and a hot gas flow path.
  • 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.
  • each storage compartment passes through an evaporator, and in the process, moisture contained in the cold air is deposited on the surface of the evaporator to form frost.
  • frost formed on the surface of the evaporator gradually accumulates and affects the flow of cold air passing through the evaporator. That is, as the flow of cold air passing through the evaporator worsens in proportion to the amount of frost, the heat exchange efficiency decreases.
  • the evaporator is operated for defrosting (defrosting operation) when a predetermined time elapses after operating the refrigerator or when conditions for the defrosting operation are satisfied.
  • the defrosting operation is performed using one or a plurality of defrost heaters installed in the evaporator, and when the defrosting operation is performed by the heat generated by these defrost heaters, the cooling operation for each storage compartment is stopped.
  • a defrost method using a defrost heater does not perform uniform defrost and requires more heating than necessary, which causes an increase in the temperature in the refrigerator, which adversely affects food stored in the storage compartment.
  • Prior Document 1 is applied only to a refrigerator in which a single compressor performs a cooling operation for one evaporator, and cannot be applied to a refrigerator in which a single compressor performs a cooling operation for two or more evaporators. .
  • the defrosting operation of the evaporator according to Prior Documents 2 and 3 should be operated in a manner capable of achieving a short operating time and minimum temperature rise in order to maintain freshness of food in the refrigerator and minimize power consumption.
  • an operation to lower the temperature of the refrigerating compartment and the freezing compartment is performed in order to maintain the freshness of the food in the refrigerator.
  • a deep cooling process for cooling each storage compartment is performed in consideration of the fact that the temperature of each storage compartment increases during the defrosting operation.
  • the refrigerating compartment reaches the excessive cooling temperature more quickly in the process of defrosting the evaporator for the freezing compartment using hot gas, causing damage to food stored in the refrigerating compartment.
  • the defrosting operation is terminated in a state in which this is not completely performed.
  • the defrosting time of the freezer compartment evaporator is longer than when the room temperature is high due to the influence of the room temperature.
  • the heat exchange efficiency of the refrigeration cycle decreases, and the temperature of the hot gas does not reach a sufficiently high temperature, so it takes a long time to defrost the evaporator for the freezer compartment.
  • the cooling power generated by the pre-defrost operation is no longer used and discarded as soon as the pre-defrost operation ends, resulting in unnecessary power consumption.
  • An object of the present invention is to prevent overcooling of the refrigerating compartment during the heat supply operation by maintaining the temperature of the refrigerating compartment sufficiently high before the heat supply operation is performed.
  • Another object of the present invention is to maintain the temperature of the refrigerating compartment within a range that does not affect food regardless of whether the heat supply operation is performed, before or after the heat supply operation is performed.
  • Another object of the present invention is to provide sufficient heat to an evaporator for a freezer compartment through a heat supply operation even when the room temperature is low.
  • An object of the present invention is to provide sufficient hot gas to the first evaporator quickly when the heat supply operation is performed.
  • An object of the present invention is to reduce the internal temperature of the freezing chamber as much as possible before the heat supply operation is performed.
  • Another object of the present invention is to reduce the operating time for heating the first evaporator.
  • a heat supply operation performed before a heat supply operation in which heat is supplied to the first evaporator may be included.
  • hot gas generated by the operation of the refrigerating cycle may be used for the heat supply operation.
  • hot gas is used to heat the first evaporator, and the refrigerant heat-exchanged while passing through the first evaporator cools the second evaporator.
  • the heat transfer operation may be performed from when the general cooling operation ends until the heat supply operation is performed.
  • the heat transfer operation may include a deep cooling process of cooling the first storage compartment.
  • the heat supply process may include a pause process in which the compressor is stopped until the heat supply operation is performed after the deep cooling process is finished.
  • heat when the heat supply operation is performed, heat may be supplied to the second storage compartment while the auxiliary heat source is operated.
  • the auxiliary heat source may include at least one heat source provided to increase or prevent a decrease in the temperature in the second storage compartment.
  • the auxiliary heat source may include at least one heat source located on an adjacent wall surface of the second storage compartment or a door for the second storage compartment.
  • the auxiliary heat source can generate heat with maximum output during the heat supply operation.
  • the auxiliary heat source may stop supplying heat when the end condition of the heat supply operation is satisfied.
  • the auxiliary heat source may stop supplying heat when the internal temperature of the second storage chamber reaches an excessive temperature.
  • the transient temperature at which heat supply from the auxiliary heat source is stopped may be higher than the first set reference temperature NT21 for the second storage compartment.
  • the transient temperature at which heat supply from the auxiliary heat source is stopped may be a temperature equal to or higher than the upper limit reference temperature (NT21 + Diff) of the second storage compartment.
  • a cold air blocking process may be performed in which the supply of cold air into the second storage compartment is blocked.
  • the cold air blocking process may be performed by stopping the compressor, stopping the blowing fan for the second storage compartment, or blocking the flow of refrigerant to the second evaporator.
  • the first storage compartment may be cooled up to the second lower limit reference temperature (NT12-Diff).
  • the second set reference temperatures NT12 and NT22 may be set to different temperatures from the first set reference temperatures NT11 and NT21.
  • the second set reference temperatures NT12 and NT22 may be set to a lower temperature than the first set reference temperatures NT11 and NT21.
  • the auxiliary heat source when the room temperature is higher than the reference temperature range, the auxiliary heat source may be controlled not to operate during the heat transfer operation.
  • the heat supply operation may include a heating process of heating the first evaporator by generating heat from a heating heat source.
  • the blower fan for the first storage compartment can be operated from the deep cooling process until the heating heat source generates heat.
  • the speed of the blowing fan for the first storage compartment may be increased from when the compressor is stopped until the heating heat source generates heat.
  • the heat transfer operation is performed at the second upper limit reference temperature (NT12 + Diff, NT12 + Diff, NT22+Diff) and the second lower limit reference temperatures (NT12-Diff, NT22-Diff), cooling may be performed while supplying cold air.
  • the first set reference temperatures NT11 and NT21 of the normal cooling operation may be set to different temperatures from the second set reference temperatures NT12 and NT22 of the heat transfer operation.
  • the second set reference temperatures NT12 and NT22 of the heat supply operation may be set to a lower temperature than the first set reference temperatures NT11 and NT21 of the normal cooling operation.
  • the first upper limit reference temperature (NT11 + Diff, NT21 + Diff) of the general cooling operation is the same as the second upper limit reference temperature (NT12 + Diff, NT22 + Diff) of the heat transfer operation. Can be set to different temperatures.
  • the second upper limit reference temperature (NT12 + Diff, NT22 + Diff) of the heat supply operation is higher than the first upper limit reference temperature (NT11 + Diff, NT21 + Diff) of the general cooling operation. It can be set to a lower temperature.
  • the first lower limit reference temperatures (NT11-Diff, NT21-Diff) of the general cooling operation are the same as the second lower limit reference temperatures (NT12-Diff, NT22-Diff) of the heat transfer operation. Can be set to different temperatures.
  • the second lower limit reference temperatures (NT12-Diff, NT22-Diff) of the heat supply operation are higher than the first lower limit reference temperatures (NT11-Diff, NT21-Diff) of the general cooling operation. It can be set to a lower temperature.
  • the internal temperature of the second storage compartment checked after the heat supply operation is completed may be excluded from the conditions for the cooling operation of the second storage compartment until the heat supply operation is performed.
  • the internal temperature of the second storage chamber may be controlled not to be measured until the heat supply operation is performed after the heat supply operation is finished.
  • a process of supplying cold air to the second storage compartment may be simultaneously performed.
  • the heat supply operation may include a heating process of heating the first evaporator.
  • the heat generation process may be performed when heat supply conditions for heating the first evaporator are satisfied after the heat supply operation of each storage compartment starts.
  • the heating process may be performed by supplying power to a heating heat source.
  • the heat supply operation may include a heat exchange process of heating the first evaporator and simultaneously cooling the second evaporator.
  • the heat exchange process may be performed while the high-temperature refrigerant compressed by the compressor is guided to flow sequentially through the first evaporator and the second evaporator along the hot gas flow path.
  • the operation control method of the refrigerator of the present invention after the heat supply operation of each storage compartment is started, it can be performed when hot gas supply conditions are satisfied.
  • hot gas supply conditions in the heat exchange process may include a case where a set time elapses after the heat transfer operation of each storage compartment is completed.
  • hot gas supply conditions in the heat exchange process may include a case where a set time elapses after power is supplied to the heating heat source.
  • hot gas supply conditions in the heat exchange process may include a case where the first evaporator temperature satisfies the set first temperature range after the heat transfer operation of each storage compartment is completed.
  • the compressor may be stopped when the heat supply operation is finished, and then operated again when the hot gas supply condition is satisfied.
  • the blower fan for the first storage compartment may be operated from when cold air is supplied to the first storage compartment for heat transfer operation until the heating heat source generates heat.
  • the temperature of the second storage compartment can be increased to the maximum due to the heat generated by the auxiliary heat source.
  • the temperature of the second storage compartment is prevented from excessively dropping during the heat supply operation.
  • the first storage compartment is cooled down to the second lower limit reference temperature (NT12-Diff) during the deep cooling process, even if the temperature of the first evaporator increases due to the heat supply operation, the first storage compartment An excessive increase in temperature is prevented.
  • N12-Diff second lower limit reference temperature
  • the blowing fan for the first storage compartment is operated until the heating heat source generates heat for the heat supply operation, the first storage compartment is cooled as much as possible before the heat supply operation.
  • the high-temperature refrigerant is rapidly and sufficiently supplied to the first evaporator when the heat exchange process of the heat supply operation is performed.
  • FIG. 1 is a state diagram showing the front appearance of a refrigerator according to an embodiment of the present invention.
  • Figure 2 is a state diagram showing the appearance of the rear side of the refrigerator according to an embodiment of the present invention
  • FIG. 3 is a state diagram showing the internal structure of a refrigerator according to an embodiment of the present invention.
  • FIG. 4 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. 5 is a perspective view illustrating 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 side view illustrating 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. 7 is a state diagram showing an operating state of each component during operation of a refrigerator according to an embodiment of the present invention.
  • FIGS. 8 to 10 are state diagrams illustrating the flow of refrigerant during a cooling operation of each storage compartment of a refrigerator according to an embodiment of the present invention.
  • FIG. 11 is a flowchart of a heat transfer operation of a refrigerator according to an embodiment of the present invention.
  • FIG. 13 is a state diagram illustrating a flow of refrigerant during a heat supply operation of a refrigerator according to an embodiment of the present invention
  • FIG. 14 is a flow chart for a temperature return operation of a refrigerator according to an embodiment of the present invention
  • 15 is a graph showing the temperature difference between the refrigerant inlet and the refrigerant outlet of the second evaporator when the cooling operation of the second storage compartment is performed before the heat supply operation of the refrigerator.
  • 16 is a graph showing the temperature difference between the refrigerant inlet and the refrigerant outlet of the second evaporator when the cooling operation of the second storage chamber is not performed before the heat supply operation of the refrigerator is performed.
  • 17 is a state diagram showing an operating state of each component during operation of a refrigerator according to another embodiment of the present invention.
  • FIG. 18 is a flow chart during a heat transfer operation of a refrigerator according to another embodiment of the present invention.
  • FIG. 19 is a flow chart during a heat supply operation of a refrigerator according to another embodiment of the present invention.
  • FIGS. 1 to 19 a preferred embodiment of the refrigerator of the present invention will be described with reference to FIGS. 1 to 19 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.
  • the refrigerator operation control method includes a heat transfer operation control method for preventing excessive cooling of the second storage compartment 102 during the heat supply operation of the refrigerator using the hot gas flow path 320. do. That is, excessive cooling of the second storage compartment 102 during the heat supply operation is prevented by raising the temperature of the second storage compartment 102 as much as possible before performing the heat supply operation.
  • 1 is a front side appearance of a refrigerator according to an embodiment of the present invention.
  • 2 is a rear side appearance of a refrigerator according to an embodiment of the present invention.
  • 3 is an internal structure of a refrigerator according to an embodiment of the present invention.
  • a refrigerator may include a refrigerator body 100 providing at least one or more storage compartments.
  • the storage compartment may include a first storage compartment 101 and a second storage compartment 102 as a storage space for storing stored goods.
  • the first storage compartment 101 or the second storage compartment 102 may be provided in plurality, or a separate storage compartment may be additionally provided.
  • the first storage compartment 101 and the second storage compartment 102 can be opened and closed by the first door 110 and the second door 120, respectively.
  • Each of the first door 110 and the second door 120 may be provided alone, or may be provided in a plurality of two or more.
  • Each of the storage chambers 101 and 102 has a first upper limit reference temperature (NT11+Diff, NT21+Diff) and a first lower limit reference temperature (NT11-Diff) set based on the first set reference temperature (NT11, NT21) by normal cooling operation. , NT21-Diff).
  • the first set reference temperature NT11 of the first storage chamber 101 may be a temperature sufficient to freeze stored goods.
  • the first set reference temperature NT11 may be set to a temperature of 0°C or less and -24°C or more.
  • the first set reference temperature NT21 of the second storage chamber 102 may be a temperature at which the stored goods are not frozen.
  • the first set reference temperature NT21 may be set to a temperature below 32°C and above 0°C.
  • the first set reference temperatures NT11 and NT21 may be set by a user. When the user does not set the first set reference temperature (NT11, NT21), an arbitrarily designated temperature is used as the first set reference temperature (NT11, NT21).
  • Each of the storage compartments 101 and 102 is supplied with cold air or stopped supplying cold air according to the upper limit or lower limit of the first set reference temperatures NT11 and NT21.
  • first upper limit reference temperature NT11 + Diff, NT21 + Diff
  • cold air is supplied to the corresponding storage compartments 101 and 102 .
  • the temperatures of the storage chambers 101 and 102 are lower than the first lower limit reference temperatures NT11-Diff and NT21-Diff, the supply of cold air is stopped.
  • each of the storage chambers 101 and 102 can be maintained at a temperature between the first upper limit reference temperature (NT11+Diff, NT21+Diff) and the first lower limit reference temperature (NT11-Diff, NT21-Diff).
  • the refrigerator according to the embodiment of the present invention is configured to include an auxiliary heat source 340 .
  • the auxiliary heat source 340 is a heat source other than the purpose of directly heating the first evaporator 250, and may include any heat source capable of increasing the internal temperature of the second storage compartment 102 or preventing a decrease thereof. .
  • the auxiliary heat source 340 may include at least one heat source located on an adjacent wall surface of the second storage compartment 102 or the door 120 for the second storage compartment.
  • the auxiliary heat source 340 may include a heat source positioned on a pillar supporting the door 120 for the second storage compartment.
  • the auxiliary heat source 340 is a refrigerator having a home-bar (a structure in which a hot/cold water dispenser or an ice maker is provided) on the door 120 for the second storage compartment
  • the heat source used in the home-bar may be included.
  • the auxiliary heat source 340 may include a heat source provided to prevent frost from forming along the edge of the door 120 for the second storage compartment.
  • the auxiliary heat source 340 may be a heat source that can affect the second storage compartment while generating heat by operation like a lamp, rather than a heat source for heating.
  • the auxiliary heat source 340 may be configured to enable output variation. For example, heat can be generated with maximum output during the heat supply operation.
  • a refrigerator includes a refrigeration system.
  • the refrigeration system may supply cold air capable of maintaining the respective storage compartments 101 and 102 at the first set reference temperatures NT11 and NT21.
  • the refrigeration system may include a compressor 210 for compressing refrigerant.
  • the compressor 210 may be located in the machine room 103 in the refrigerator body 100 .
  • a recovery passage 211 may be connected to the compressor 210 .
  • the recovery passage 211 guides the flow of the refrigerant recovered to the compressor 210 .
  • the recovery passage 211 is formed to receive refrigerant passing through each passage (eg, a first refrigerant passage and a second refrigerant passage, or a hot gas passage, etc.) and guide it to the compressor 210 .
  • each passage eg, a first refrigerant passage and a second refrigerant passage, or a hot gas passage, etc.
  • 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 in which refrigerant is condensed.
  • the condenser 220 condenses the refrigerant compressed in the compressor 210 .
  • the condenser 220 may be located in the machine room 103 in the refrigerator body 100 .
  • a cooling fan (C-Fan) 221 may be provided adjacent to the condenser 220 .
  • the cooling fan 221 may be provided in the machine room 103 .
  • the refrigerant passing inside the condenser 220 by the operation of the cooling fan 221 may exchange heat with air passing outside the condenser 220 .
  • the cooling fan 221 is not operated, the refrigerant passing through the condenser 220 is maintained at a high temperature.
  • the cooling fan 221 may be configured to interlock with the operation of the compressor 210 . That is, when the compressor 210 operates, the cooling fan 221 may also operate. In another preset situation, the cooling fan 221 may be set to stop even when the compressor 210 operates.
  • the refrigeration system may include a first expander 230 and a second expander 240 that depressurize and expand the refrigerant condensed in the condenser 220 .
  • the first expander 230 is provided to depressurize the refrigerant flowing into the first evaporator 250 after passing through the condenser 220 .
  • the second expander 240 is provided to depressurize the refrigerant flowing into the second evaporator 260 after passing through the condenser 220 .
  • the refrigeration system may include a first evaporator 250 and a second evaporator 260 .
  • the refrigerant reduced in pressure in the first expander 230 exchanges heat with air (cold air) flowing in the first storage chamber 101 while passing through the first evaporator 250 .
  • the refrigerant reduced in pressure in the second expander 240 exchanges heat with air (cold air) flowing in the second storage chamber 102 while passing through the second evaporator 260 .
  • the first evaporator 250 may be located in the first storage chamber 101 . Although not shown, the first evaporator 250 may be located in a location other than the first storage chamber 101 .
  • the air flowing by the driving of the F-Fan 281 for the first storage compartment undergoes heat exchange.
  • the second evaporator 260 may be located in the second storage chamber 102 . Although not shown, the second evaporator 260 may be located in a location other than the second storage chamber 102 .
  • the air flowing by the driving of the R-Fan 291 for the second storage compartment undergoes heat exchange.
  • the refrigeration system may include a first refrigerant flow path (F-Path) 201.
  • F-Path refrigerant flow path
  • the first refrigerant passage 201 passes through the first expander 230 and guides the flow of the refrigerant supplied to the first evaporator 250 .
  • the refrigeration system may include a second refrigerant flow path (R-Path) 202 .
  • the second refrigerant passage 202 passes through the second expander 240 and guides the flow of refrigerant provided to the second evaporator 260 .
  • the refrigeration system may include a physical property control unit 270.
  • the physical property controller 270 provides resistance to the flow of the refrigerant flowing through the hot gas flow path 320 to the second evaporator 260 through the first evaporator 250 . That is, resistance is provided to the flow of the refrigerant provided to the second evaporator 250 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 refrigerant condensed and liquefied while passing through the first evaporator 250 has physical properties in a state where it can be heat exchanged in the second evaporator 260 while passing through the property control unit 270 . Accordingly, a problem in which operation reliability of the compressor 210 is deteriorated due to excessive liquefaction of the refrigerant returned to the compressor 210 after passing through the second evaporator 260 can be prevented.
  • the resistance provided by the above-described physical property adjusting unit 270 may be formed differently from the resistance provided by the second expander 240 . Accordingly, a difference in physical properties between the refrigerant passing through the first evaporator 250 and flowing into the second evaporator 260 and the refrigerant flowing directly into the second evaporator 260 without passing through the first evaporator 250 can be reduced.
  • the physical property control unit 270 may be designed in consideration of the flow path length, the pressure within the flow path, and the density of the refrigerant within the flow path. That is, the resistance may be adjusted by changing at least one of the flow path length of the material property controller 270, the pressure within the flow path, and the density of the refrigerant within the flow path.
  • the physical property control unit 270 may be formed with a different diameter or a different length from that of the second expander 240 . Through this, the refrigerant flowing into the second evaporator 260 after the physical properties are adjusted in the physical property controller 270 can be made substantially similar to or identical to the physical properties of the refrigerant that has passed through the second expander 240 .
  • the physical property control unit 270 may have the same diameter as the second expander 240 and may have a different length.
  • the physical property control unit 270 may be shorter than the second expander 240 .
  • the physical property control unit 270 and the second expander 240 have the advantage that they can be used in common if they have the same diameter.
  • the physical property control unit 270 may be formed to have the same length as the second expander 240 and have a different diameter.
  • the material property control unit 270 may have a larger pipe diameter than the second expander 240 .
  • the refrigeration system may include a flow path conversion valve 330.
  • the refrigerant passing through the condenser 220 may be guided along the discharge passage 203 .
  • the first refrigerant passage 201, the second refrigerant passage 202, and the hot gas passage 320 may be formed to be branched from the discharge passage 203, respectively.
  • the flow path conversion valve 330 may be installed at a portion where each flow path 201 , 202 , and 320 is branched from the discharge flow path 203 . That is, the refrigerant flowing into the discharge passage 203 by the operation of the flow path switching valve 330 is transferred to either the first refrigerant flow path 201, the second refrigerant flow path 202, or the hot gas flow path 320. It was made available to the euro.
  • At least one flow path conversion valve 330 may be provided.
  • the flow path conversion valve 330 may be formed as a 4-way valve.
  • the flow path switching valve 330 may include at least one 3-way valve, check valve, or solenoid valve.
  • the refrigeration system may include a hot gas flow path (H-Path) 320.
  • H-Path hot gas flow path
  • the hot gas flow path 320 provides high-temperature heat to a place where heat is needed.
  • the hot gas passage 320 may be formed to guide the refrigerant (hot gas) compressed by the compressor 210 and passing through the condenser 220 . That is, the hot gas (high-temperature refrigerant) guided by the hot gas passage 320 provides heat.
  • the hot gas passage 320 is formed to guide the flow of a refrigerant (hot gas) separately from the first refrigerant passage 201 and the second refrigerant passage 202 .
  • the hot gas passage 320 is connected to the discharge passage 203, and the hot gas (high temperature refrigerant) guided to the discharge passage 203 is directed to the first evaporator 250 without passing through the first expander 230. After being provided, it may pass through the first evaporator 250 and be provided to the second evaporator 260 . That is, the high-temperature refrigerant compressed in the compressor 210 by the hot gas flow path 320 can heat the first evaporator 250 while passing through the first evaporator 250 .
  • the hot gas passage 320 includes a first pass 321 from the passage switching valve 330 to the first evaporator 250 .
  • the first pass 321 may be formed to have the same diameter as the discharge passage 203 extending from the condenser 220 to the passage conversion valve 330 . As a result, common use of the discharge passage 203 and the first pass 321 is possible.
  • the hot gas flow path 320 includes a second pass 322 passing through the first evaporator 250 .
  • the second pass 322 may be formed to contact the heat exchange pins 251 through a pipe expansion operation after penetrating through each of the heat exchange pins 251 constituting the first evaporator 250 . As a result, the hot gas passing through the second pass 322 can smoothly remove the frost frozen in the first evaporator 250 .
  • the hot gas flow path 320 includes a third pass 323 from the second pass 322 to the physical property adjusting unit 270 .
  • the third pass 323 may be formed to have the same diameter as the first pass 321 .
  • the refrigeration system may include a guide passage 350.
  • the guide passage 350 guides the refrigerant flowing into the second evaporator 260 via the second expander 240 or the property control unit 270 .
  • the refrigerant passing through the second expander 240 or the property control unit 270 passes through the guide passage 350 or is mixed with each other in the guide passage 350 and then flows into the second evaporator 260. It can be. As a result, the deviation between the physical properties of the refrigerant passing through the second expander 240 and flowing into the second evaporator 260 and the physical properties of the refrigerant flowing into the second evaporator 260 through the property adjusting unit 270 can be reduced. .
  • the refrigerator according to the embodiment of the present invention may include a heating source 310 .
  • the heating heat source 310 is a heat source that provides high-temperature heat together with the hot gas flow path 320 .
  • Heat provided by the heating heat source 310 or the hot gas flow path 320 may be used in various ways. For example, heat provided by the heating heat source 310 or heat provided by the hot gas flow path 320 may be used to defrost the first evaporator 250 .
  • the heating heat source 310 may be formed of a sheath heater (Sheath HTR) that generates heat by power supply.
  • Sheath HTR sheath heater
  • the heating heat source 310 may be provided at any one adjacent part of the first evaporator 250 .
  • the heating heat source 310 may be located at the bottom of the heat exchange fin 251 of the lowest row constituting the first evaporator 250 . This is the same as the attached Figures 5 and 6.
  • the heating heat source 310 may be positioned to be spaced apart from the heat exchange fin 251 of the lowermost row constituting the first evaporator 250 . Thus, the heat generated by the heat generated by the heating heat source 310 may heat the first evaporator 250 while flowing upward.
  • reference numeral 280 denotes a first grill assembly that guides the flow of cold air into the first storage compartment.
  • reference numeral 290 denotes a second grill assembly that guides the flow of cold air into the second storage compartment.
  • the control unit may be a controller provided in the refrigerator or a control means (eg, a home network, an online service server, etc.) on a network connected to remotely control the controller of the refrigerator.
  • a control means eg, a home network, an online service server, etc.
  • the operation for each situation may include a general cooling operation (S100).
  • This general cooling operation (S100) is an operation for cooling the first storage compartment 101 and the second storage compartment 102 according to the respective first set reference temperatures NT11 and NT21. 8 is a flowchart showing the process of the general cooling operation (S100).
  • the first upper limit reference temperature (NT11+Diff, NT21+Diff) or the first lower limit reference temperature (NT11-Diff, NT21-Diff) cold air is supplied (S121, S131) or cold air supply is stopped (S122, S132), and a general cooling operation (S100) is performed.
  • the internal temperature of the first storage compartment 101 exceeds the first upper limit reference temperature (NT11 + Diff) and reaches an unsatisfactory temperature
  • cold air is supplied to the first storage compartment 101 (S131).
  • the internal temperature of the first storage compartment 101 reaches the first lower limit reference temperature (NT11-Diff)
  • the supply of cold air to the first storage compartment 101 is stopped (S132).
  • the compressor 210 and the cooling fan (C-Fan) 221 are operated.
  • the flow path switching valve 330 is operated so that the refrigerant flows through the first refrigerant flow path 201. This is the same as the attached figure 9.
  • the refrigerant compressed by the operation of the compressor 210 is condensed while passing through the condenser 220, and the condensed refrigerant is reduced in pressure and expanded while passing through the first expander 230.
  • the refrigerant expanded in the first expander 230 exchanges heat with air passing through the first evaporator 250 while passing through the first evaporator 250 .
  • the refrigerant heat-exchanged in the first evaporator 250 is returned to the compressor 210 through the return passage 211 and then compressed, repeating a circular operation.
  • the blowing fan 281 for the first storage compartment is operated.
  • the air in the first storage compartment 101 passes through the first evaporator 250 and is re-supplied into the first storage compartment 101, repeating a circulation operation.
  • the air in the first storage compartment 101 exchanges heat with the first evaporator 250 while passing through the first storage compartment 250, and is supplied into the first storage compartment 101 at a lower temperature, and the first storage compartment 101 ) lower the temperature inside.
  • the compressor 210 and the cooling fan (C-Fan) 221 are operated.
  • the flow path switching valve 330 is operated so that cold air flows through the second refrigerant flow path 202 .
  • the compressor 210 When the compressor 210 is operated, the refrigerant is compressed, and the compressed refrigerant is condensed while passing through the condenser 220 .
  • the condensed refrigerant is reduced in pressure and expanded while passing through the second expander 240 .
  • the refrigerant passes through the second evaporator 260, exchanges heat with air flowing around the refrigerant, flows into the compressor 210 along the return passage 211, and repeats a circulation operation in which it is compressed. This is shown in the attached figure 10.
  • the blowing fan 291 for the second storage compartment is operated.
  • the air in the second storage compartment 102 passes through the second evaporator 260 and is re-supplied into the second storage compartment 102 to repeat the circulation operation.
  • the air exchanges heat with the second evaporator 260 while passing through the second evaporator 260 and is supplied into the second storage compartment 102 at a lower temperature, thereby reducing the temperature R in the second storage compartment 102. lower it
  • the internal temperature (F, R) of the first storage compartment 101 and the second storage compartment 102 together can form a dissatisfaction temperature (temperature higher than the first upper limit reference temperature (NT11 + Diff, NT21 + Diff)).
  • the operation may be performed 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 second storage compartment 102 to satisfy a temperature (between the first upper limit reference temperature (NT11+Diff, NT21+Diff) and the first lower limit reference temperature (NT11-Diff, NT21-Diff)).
  • a temperature between the first upper limit reference temperature (NT11+Diff, NT21+Diff) and the first lower limit reference temperature (NT11-Diff, NT21-Diff)
  • it may be operated so that cold air is supplied to the first storage compartment 101 .
  • the second storage compartment 102 is a storage compartment maintained at room temperature, the stored goods stored in the corresponding storage compartment 102 may be sensitive to temperature changes.
  • the operation of the refrigerator for each situation may include a heat transfer operation (S210).
  • the heat supply operation (S210) is performed before the heat supply operation (S220) when the start condition of the heat supply operation (S220) is satisfied during the normal cooling operation (S100).
  • the heat transfer operation (S210) may be performed to sequentially cool the first storage compartment 101 and the second storage compartment 102 (S211 and S212).
  • the heat supply operation (S220) is performed by performing the heat supply operation (S210) It is to cool each storage chamber (101, 102). This is shown in the attached figure 11.
  • the storage compartments 101 and 102 are operated to cool down to the second lower limit reference temperature (NT12-Diff, NT22-Diff) set based on the second set reference temperature (NT12, NT22). It can be.
  • the second set reference temperatures NT12 and NT22 may be set to different temperatures from the first set reference temperatures NT11 and NT21.
  • the second set reference temperatures NT12 and NT22 may be set to a lower temperature than the first set reference temperatures NT11 and NT21.
  • the second lower limit reference temperatures NT12-Diff and NT22-Diff may also be set to a lower temperature than the first lower limit reference temperatures NT11-Diff and NT21-Diff.
  • the second set reference temperature (NT12, NT22) is set to be the same as the first set reference temperature (NT11, NT21), and the first lower limit reference temperature (NT11-Diff, NT21-Diff) is the second lower limit reference temperature. It may be set to a temperature different from (NT12-Diff, NT22-Diff). Even in this case, the second lower limit reference temperatures NT12-Diff and NT22-Diff may be set to a lower temperature than the first lower limit reference temperatures NT11-Diff and NT21-Diff.
  • the second refrigerant passage 202 and the first refrigerant passage 201 are sequentially opened or closed by the operation of the passage switching valve 330.
  • the compressor 210 and the cooling fan 221 continue to operate.
  • the blower fan 291 for the second storage compartment and the blower fan 281 for the first storage compartment are sequentially operated.
  • the refrigerant flows into the first refrigerant passage 201 by the operation of the flow path switching valve 330.
  • the compressor 210 and the cooling fan 221 are operated.
  • the blowing fan 281 for the first storage compartment may be operated.
  • the refrigerant flows into the second refrigerant flow path 202 by the operation of the flow path switching valve 330.
  • the compressor 210 and the cooling fan 221 are operated.
  • the blowing fan 291 for the second storage compartment may be operated.
  • the heat transfer operation (S210) may be operated such that the second storage compartment 102 is preferentially cooled and then the first storage compartment 101 is cooled. That is, since the temperature of the second storage compartment 102 gradually decreases during the heat supply operation (S220), the second storage compartment 102 is cooled before the first storage compartment 101, and during the heat supply operation (S220), the first storage compartment ( 101) to reduce the temperature drop.
  • the pump may be controlled to be down. That is, when the heat transfer operation (S210) ends and the flow path switching valve 330 is operated to block the flow of refrigerant to the respective flow paths 201 and 202, the compressor 210 is additionally operated for a predetermined time. Accordingly, the refrigerant collected in the second evaporator 260 may be recovered to the compressor 210 . Accordingly, when the heat exchange process of the heat supply operation (S220) is performed, the high-temperature refrigerant can be rapidly supplied to the first evaporator 250 and supplied in a sufficient amount.
  • a pause process (S216) is performed for a predetermined time until the heat supply operation (S220) is performed. That is, excessive continuous operation of the compressor 210 can be prevented by the pause process (S216). This is as shown in the attached FIGS. 7, 11 and 12.
  • the pause process (S216) may be set by time.
  • the compressor 210 may be stopped for a set time after the heat supply operation (S210) is completed.
  • the pause process (S216) may be set to a longer time than the minimum pause time of the compressor 210.
  • the pause process may be set to 3 minutes.
  • the first storage compartment blower fan 281 sets the temperature of the first evaporator (FD) to the first storage compartment temperature (F) from when cold air is supplied to the first storage compartment (101). It can be operated until reaching
  • the blowing fan 281 for the first storage compartment is additionally operated until the heat supply operation (S220) is performed.
  • the temperature of the first evaporator 250 rises rapidly, and the time for heating the first evaporator 250 during the heat supply operation (S220) can be shortened.
  • the blowing fan 281 for the first storage compartment 281 has completed the cooling of the first storage compartment 101 (S213) and the heating condition of the heating heat source 310 is higher after the compressor 210 is stopped than before the compressor 210 is stopped. Until it is satisfied, it may be rotated at a higher speed (S214).
  • the second storage compartment 102 is circulated after the heat transfer operation (S210) by controlling the rotation to be faster than the rotation speed during the heat transfer operation (S210). This is to maximize the flow rate. Accordingly, it is possible to shorten the time required for the first evaporator temperature FD to become equal to the first storage compartment temperature F.
  • the cooling of the first storage compartment 101 is completed (S213) and the rotational speed of the first storage compartment fan 281 before the compressor 210 is stopped cools the first storage compartment 101 during the normal cooling operation (S100). It may be set to be slower than or equal to the rotation speed performed to do so.
  • the supply of cold air to the second storage compartment 102 may be blocked until the heat supply operation (S220) is performed after the heat supply operation (S210) is finished. That is, even if the temperature in the second storage compartment 102 reaches the dissatisfied region during the rest process (S216) before the heat supply operation (S220) after the heat transfer operation (S210), the cooling operation of the second storage compartment (102) not carried out Accordingly, during the heat supply operation (S220), overcooling of the second storage compartment 102 can be prevented.
  • a method of blocking the cold air supply (or a method of not performing a cooling operation) may be provided in various ways.
  • the second storage compartment temperature (R) checked before the heat supply operation (S220) is performed may be excluded from the conditions for the cooling operation of the second storage compartment (102).
  • the second storage room temperature (R) is an unsatisfactory temperature (temperature exceeding the second upper limit reference temperature (NT22 + diff)). Even if it is, the cooling operation of the second storage chamber 102 is not performed. As a result, supply of cold air to the second storage compartment 102 may be blocked.
  • the compressor 210 may be controlled to stop until the heat supply operation (S220) is performed. As a result, supply of cold air to the second storage compartment 102 may be blocked.
  • the second storage compartment temperature (R) is not measured until the heat supply operation (S220) is performed. As a result, supply of cold air to the second storage compartment 102 may be blocked.
  • the flow path switching valve 330 may be controlled so that the refrigerant supply flowing to the second evaporator 260 is blocked until the heat supply operation (S220) is performed. there is. As a result, supply of cold air to the second storage compartment 102 may be blocked.
  • the blower fan 291 for the second storage compartment may be controlled to stop after the heat supply operation ( S210 ) ends until the heat supply operation ( S220 ) is performed. As a result, supply of cold air to the second storage compartment 102 may be blocked.
  • the operation of the refrigerator for each situation may include a heat supply operation (S220).
  • the heat supply operation (S220) may be an operation to provide heat for heating the first evaporator (250).
  • the heat supply operation (S220) may be used to defrost frost generated on the surface of the first evaporator 250.
  • the heat supply operation (S220) will be described with reference to FIGS. 12 and 13 attached.
  • the heat supply operation (S220) may be performed when the operation conditions are satisfied.
  • the defrosting operation of the first evaporator 250 when the defrosting operation of the first evaporator 250 is required, it may be determined that the operating condition of the heat supply operation (S220) is satisfied.
  • the defrosting operation checks the amount or flow rate of cold air passing through the first evaporator 250, checks whether the cumulative operation time of the compressor 210 has elapsed, It is possible to determine whether operation is necessary by checking whether the temperature is maintained at the unsatisfactory temperature.
  • the heat supply operation (S220) may be performed after the heat supply operation (S210) is performed first. .
  • the heat supply operation (S220) may include a heating process of providing heat to the first evaporator 250 using the heating heat source 310.
  • the heating process may be performed when the heating conditions for heating the first evaporator 250 are satisfied after the heat supply operation (S210) of each storage chamber 101 or 102 starts. That is, the first evaporator 250 is heated by generating heat from the heating source 310 only when the heating condition is satisfied.
  • An exothermic condition of the exothermic process may be set by time. For example, it may be determined that the heating condition is satisfied when a set time elapses after the heat supply operation (S210) ends.
  • the heating condition of the heating process is set to temperature. That is, by setting the heating condition to temperature, it is possible to accurately respond to changes in various surrounding environments.
  • the heating condition is set to temperature
  • the first evaporator temperature (FD) is checked (S221), and if the first evaporator temperature (FD) is equal to or higher than the first storage compartment temperature (F), it is determined that the heating condition is satisfied. . That is, when the temperature of the first evaporator (FD) gradually rises during the heat transfer operation or after the heat transfer operation is completed and becomes equal to or higher than the temperature (F) of the first storage compartment, it is determined that the heating condition is satisfied and the heating heat source ( 310) generates heat (S222).
  • the first evaporator temperature FD may include the temperature of the outlet side of the refrigerant or the temperature of the outlet side of the cold air of the first evaporator 250 .
  • the time set in the pause process (S216) may be disregarded. That is, even before the time set for the pause process (S216) elapses, if the heating condition of the heating heat source 310 is satisfied, the heating heat source 310 can be controlled to generate heat.
  • the heat supply operation (S220) may include a heat exchange process of providing heat to the first evaporator 250 using circulation of the refrigerant.
  • the first evaporator 250 may be heated and the second evaporator 260 may be operated to be cooled (S223). That is, it is possible to supply cold air to the second storage chamber 102 while performing the defrosting operation of the first evaporator 250 by the heat exchange process.
  • the temperature F of the first storage compartment may increase, while the temperature R of the second storage compartment may decrease.
  • This heat exchange process may be performed by supplying cool air to the hot gas flow path 320 . That is, the high-temperature refrigerant compressed by the operation of the compressor 210 flows along the condenser 220, the discharge passage 203, and the hot gas passage 320, and then passes through the first expander 230 to the first evaporator. While flowing to 250, the first evaporator 250 is heated. Subsequently, the refrigerant heated in the first evaporator 250 is depressurized through the physical property control unit 270 and then heat-exchanged while passing through the second evaporator 260 to cool the second evaporator 260 .
  • the blowing fan 291 for the second storage compartment is operated. Accordingly, the refrigerant depressurized after passing through the physical property control unit 270 exchanges heat with the air in the second storage chamber 102 while passing through the second evaporator 260 . The air is provided back into the second storage compartment 102 to lower the temperature in the second storage compartment 102 .
  • the heat exchange process by the refrigerant may be performed prior to the exothermic process or performed later than the exothermic process according to the room temperature.
  • the heating process may be performed prior to the heat exchange process.
  • the low temperature temperature range may be a temperature range lower than a preset reference temperature range. Even when the room temperature is within the reference temperature range, the heating process may be performed prior to the heat exchange process.
  • the first evaporator 250 is first heated with the heating heat source 310, and then the first evaporator 250 is heated using a high-temperature refrigerant ( 250) may be desirable.
  • the effect of the room temperature on the first evaporator 250 is insignificant. For this reason, heating the periphery of the first evaporator 250 using the heating heat source 310 and then heating the first evaporator 250 using hot gas shortens the defrosting time of the first evaporator 250.
  • the reference temperature range may be set to an average indoor temperature range in spring and autumn, or may be a temperature considering other indoor conditions.
  • the high-temperature temperature range may be set as an average indoor temperature range in summer or may be a temperature considering other indoor conditions.
  • the heat exchange process is preferably performed when the hot gas supply condition of each storage compartment 101 or 102 is satisfied. That is, when the heat supply operation (S210) ends, the compressor 210 is stopped, and then the compressor 210 is restarted when the hot gas supply condition is satisfied.
  • These hot gas supply conditions may include various cases.
  • the hot gas supply condition may include a case where a set time elapses after power is supplied to the heating heat source 310 . For example, when 10 minutes have elapsed after supplying power to the heating heat source 310, it is determined that the hot gas supply condition is satisfied and the heat exchange process is performed.
  • the high-temperature refrigerant is supplied along the hot gas flow path 320 to the first evaporator ( 250) can be further heated.
  • the hot gas supply condition may include a case where a set time elapses after the heat supply operation of each storage chamber 101 or 102 is finished. That is, when a set time elapses after the heat supply operation (S210) ends, it may be determined that the hot gas supply condition is satisfied.
  • the first evaporator temperature (FD) reaches the set second temperature (X2) (FD ⁇ X2). °C) may be included. That is, when the first evaporator temperature (FD) reaches the set second temperature (X2) after the heat supply operation (S210) ends, it can be determined that the hot gas supply condition is satisfied.
  • the second temperature X2 may be a temperature higher than the first storage compartment temperature F and lower than the first temperature X1 at which heat generation of the heating heat source 310 is terminated.
  • the first temperature (X1) is the first evaporator temperature (FD) at the time when the heat generation of the heating heat source 310 is set to end.
  • the second temperature (X2) when the second temperature (X2) is set to the first temperature (X1) at which the heat generation of the heating heat source 310 is terminated, heating by heat from the heating heat source 310 and heating using hot gas are not simultaneously performed. may not be Considering this, the second temperature (X2) may be set to a lower temperature than the first temperature (X1) at which heat generation of the heating heat source 310 is terminated.
  • the heat generation termination condition is a condition for terminating heat generation of the heating heat source 310 and may include a case where the first evaporator temperature FD satisfies the preset first temperature X1. That is, when the first evaporator temperature (FD) reaches the first temperature (X1), it is determined that the heat generation termination condition is satisfied, and the power supplied to the heating source 310 is cut off (S224).
  • the first temperature X1 may be a temperature considering the temperature rise of the first storage chamber 101 .
  • the first temperature X1 may be set to 5°C.
  • the first temperature X1 may be equal to or higher than the second temperature X2 for confirming the satisfaction of the hot gas supply condition.
  • the heat exchange termination condition is a condition in which the supply of hot gas (refrigerant) is terminated, and may actually be a condition in which the heat supply operation (S220) for heating the first evaporator 250 is terminated.
  • These heat exchange termination conditions may include a case where the second storage chamber 102 reaches a satisfactory temperature. That is, since the second storage compartment 102 is a storage compartment for refrigerated storage, damage such as freezing of stored items may occur when the temperature drops excessively.
  • the satisfactory temperature is a temperature equal to or less than the lower limit reference temperature (NT2-Diff) set based on the set reference temperature (NT2) of the second storage compartment (102). That is, when the temperature R of the second storage compartment reaches the lower limit reference temperature (NT2-Diff) or becomes lower than the lower limit reference temperature (NT2-Diff), the supply of refrigerant to the hot gas flow path 320 is cut off.
  • N2-Diff lower limit reference temperature
  • the blowing fan 291 for the second storage compartment may be controlled to stop. That is, by delaying the time for the second storage chamber 102 to reach a satisfactory temperature, it is possible to secure time for the first evaporator 250 to be sufficiently heated.
  • the heat exchange termination condition may be determined based on the entire operation time of the heat supply operation (S220).
  • the supply of refrigerant to the hot gas flow path 320 may be cut off and the heat exchange process may be ended (S225).
  • the blowing fan 291 for the second storage compartment may be stopped.
  • the compressor 210 may be additionally operated for a certain period of time and then stopped.
  • the compressor 210 by performing a pump down operation in which the compressor 210 is additionally operated while the flow of the refrigerant is blocked, the refrigerant in the hot gas flow path 320 passes through the compressor 210 and then enters the flow path switching valve 330. let's get together Accordingly, when the compressor 310 is restarted after stopping, the refrigerant supply to the evaporators 250 and 260 can be quickly and sufficiently performed without time delay.
  • operation of the refrigerator for each situation may include a temperature return operation (S230).
  • the temperature return operation (S230) is an operation for cooling the first storage chamber 101, which has been raised by heating of the first evaporator 250, to a satisfactory range.
  • the temperature return operation (S230) may be performed at the end of the heat supply operation (S220).
  • the temperature return operation (S230) may be performed after a pause process (S231) for a set time (eg, 3 minutes) when performed at the end of the heat supply operation (S220). That is, after the pause process (S231) is performed, an operation for cooling the first storage compartment 101 is performed.
  • the blowing fan 281 for the first storage compartment may be controlled to rotate (S233).
  • the blowing fan 281 for the first storage compartment may be controlled to operate from when the first evaporator temperature FD becomes lower than the first storage compartment temperature F.
  • the cooling operation of the first storage compartment 101 ends.
  • the second storage compartment 102 and the first storage compartment 101 alternately perform the cooling operation, and then return to normal cooling operation (S100).
  • the cooling operation of the second storage compartment 102 is omitted during the heat transfer operation (S210).
  • the heat transfer operation (S210) may include a deep cooling process of cooling the first storage compartment 101. In the deep cooling process, an operation for cooling the second storage compartment 102 is not performed.
  • the deep cooling process may be performed immediately after the normal cooling operation (S100) is stopped or after a certain period of time has elapsed.
  • the normal cooling operation ends. After that, a deep cooling process for cooling the first storage chamber 101 is performed immediately or after a certain period of time has elapsed.
  • the temperature of the first storage compartment 101 is increased, and thus the food stored in the first storage compartment 101 can receive heat.
  • the first storage chamber 101 is cooled (S218) by a deep cooling process before performing the heat supply operation (S220).
  • the first refrigerant passage 201 is opened by the operation of the passage switching valve 330.
  • the compressor 210 and the cooling fan 221 are operated, and the blowing fan 281 for the first storage compartment is operated.
  • the first storage chamber 101 may be operated to cool down to a second lower limit reference temperature (NT12-Diff) set based on the second set reference temperature (NT12).
  • NT12-Diff second lower limit reference temperature
  • the second set reference temperature NT12 may be set to a different temperature from the first set reference temperature NT11.
  • the second set reference temperature NT12 may be set to a lower temperature than the first set reference temperature NT11.
  • the second lower limit reference temperature NT12-Diff may also be set to a lower temperature than the first lower limit reference temperature NT11-Diff.
  • the second set reference temperature NT12 is set equal to the first set reference temperature NT11, and the first lower limit reference temperature NT11-Diff is a temperature different from the second lower limit reference temperature NT12-Diff. may be set to Even in this case, the second lower limit reference temperature NT12-Diff may be set to a temperature lower than the first lower limit reference temperature NT11-Diff.
  • the deep cooling process ends when the temperature (F) of the first storage compartment 101 reaches the second lower limit reference temperature (NT12-Diff) (S219).
  • the heat supply operation (S210) may include a heat supply process by the auxiliary heat source 340.
  • the auxiliary heat source 340 provides heat to the second storage compartment 102 while being turned on (S217) during the heat supply operation (S210). That is, in the process of supplying heat by the auxiliary heat source 340, the temperature of the second storage compartment 102 can be increased as much as possible until the heat supply operation (S220) is performed. Accordingly, a problem in which the temperature of the second storage compartment is excessively lowered during the heat supply operation (S220) can be prevented.
  • auxiliary heat source 340 may or may not be performed based on room temperature (RT).
  • the auxiliary heat source may be controlled not to operate in the reference temperature range or a temperature range higher than the reference temperature range.
  • the control unit may continuously acquire the room temperature (RT), and the acquired room temperature (RT) determines whether or not to generate heat from the auxiliary heat source 340 when the condition of the heat supply operation (S220) is satisfied during the normal cooling operation.
  • the auxiliary heat source 340 may be operated from when the normal cooling operation (S100) is stopped and the heat transfer operation (S220) starts.
  • the auxiliary heat source 340 is turned ON (S217) (refer to FIG. 18) from when the heat supply operation (S210) starts when the condition of the heat supply operation (S220) is satisfied during the normal cooling operation (S100). Accordingly, the heat supply operation (S220) can be started with the temperature R of the second storage compartment maximally increased, and excessive drop in temperature of the second storage compartment 102 can be prevented during the heat supply operation.
  • the auxiliary heat source 340 may be controlled to stop supplying heat (S227) (see FIG. 19) when the end condition of the heat supply operation (S220) is satisfied. That is, the auxiliary heat source 340 may be controlled to continuously provide heat even during the heat supply operation. Accordingly, even when the indoor temperature is low, it is possible to prevent a phenomenon in which the temperature R of the second storage compartment is excessively lowered or the heating effect of the first evaporator 250 by the hot gas is lowered during the heat supply operation (S220).
  • the auxiliary heat source 340 may generate heat with maximum output during the heat supply operation (S210). That is, while the auxiliary heat source 340 generates heat with maximum output, the temperature of the second storage compartment 102 can be increased to the maximum. Thus, excessive drop in temperature of the second storage compartment 102 during the heat supply operation can be prevented.
  • the auxiliary heat source 340 may generate heat with a maximum output during the heat supply operation (S220) or with an output lower than the maximum output.
  • auxiliary heat source 340 is used to prevent freezing in a specific part or configuration, even when operated at maximum output, the temperature of the second storage compartment 102 does not rise rapidly or rise to an excessive temperature.
  • the second storage chamber 102 may rise to a temperature at which deterioration of stored food may be concerned. For example, when high-temperature food is put into the second storage compartment 102, the temperature inside the second storage compartment 102 may increase excessively even though the room temperature is low.
  • the auxiliary heat source 340 may stop supplying heat when the internal temperature of the second storage compartment 102 reaches an excessive temperature.
  • a cold air blocking process may be performed in which the supply of cold air into the second storage compartment 102 is blocked. That is, even if heat is provided to the second storage compartment 102, a decrease in heating effect due to the supply of cold air can be prevented.
  • This cold air blocking process may be performed by stopping the operation of the blowing fan 291 for the second storage compartment or by blocking the flow of refrigerant to the second evaporator 260 .
  • the refrigerator of the present invention can be implemented in various forms not shown unlike the above-described embodiments.
  • heat generated by the refrigerant (hot gas) flowing through the hot gas flow path 320 may be used for other purposes than the defrosting operation of the first evaporator 250 .
  • the hot gas flow path 320 may be used for heating a part requiring heat (eg, an ice maker for ice removal, a door to prevent frost formation, and a storage compartment 101 or 102 to prevent overcooling).
  • a part requiring heat eg, an ice maker for ice removal, a door to prevent frost formation, and a storage compartment 101 or 102 to prevent overcooling.
  • the hot gas flow path 320 is not divided into the first pass 321, the second pass 322, and the third pass 323, but has the same outer diameter (or inner diameter). Can be formed into a conduit.
  • the flow path switching valve 330 may be operated to simultaneously open two or more flow paths.
  • first refrigerant passage 201 and the hot gas passage 320, the second refrigerant passage 202 and the hot gas passage 320, or the first refrigerant passage 201 and the second refrigerant passage 202 may flow while being opened at the same time.
  • the refrigerator of the present invention may be formed such that the hot gas flow path 320 is branched from the flow path between the compressor 210 and the condenser 220 . That is, the high-temperature refrigerant passing through the compressor 210 may be formed so as to pass directly through the first evaporator 250 without passing through the condenser 220 and the first expander 230 by the hot gas flow path 320. will be.

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Abstract

Un procédé de commande de fonctionnement de réfrigérateur selon la présente invention comprend un procédé de commande destiné à, pendant une opération de fourniture de chaleur du réfrigérateur à l'aide d'un trajet d'écoulement de gaz chaud, empêcher le sur-refroidissement d'un second compartiment de stockage, qui est provoqué lorsque la température intérieure est à un état de basse température. En d'autres termes, lorsque la température intérieure est à un état de basse température, la température du second compartiment de stockage peut être augmentée au maximum avant la réalisation de l'opération de fourniture de chaleur.
PCT/KR2022/008432 2021-07-12 2022-06-14 Procédé de commande de fonctionnement de réfrigérateur WO2023287037A1 (fr)

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KR1020210090871A KR20230010387A (ko) 2021-07-12 2021-07-12 냉장고의 운전 제어방법
KR10-2021-0090871 2021-07-12
KR1020210090864A KR20230010380A (ko) 2021-07-12 2021-07-12 냉장고의 운전 제어방법
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4043144A (en) * 1976-06-17 1977-08-23 Dole Refrigerating Company Hot gas defrost system
KR20130088914A (ko) * 2012-01-31 2013-08-09 엘지전자 주식회사 냉장고 및 그 제상 운전 방법
KR20170013767A (ko) * 2015-07-28 2017-02-07 엘지전자 주식회사 냉장고
KR102065492B1 (ko) * 2018-12-05 2020-01-13 (주)에이씨알텍 이동식 냉장고
WO2020175831A1 (fr) * 2019-02-28 2020-09-03 엘지전자 주식회사 Procédé de commande de réfrigérateur

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4043144A (en) * 1976-06-17 1977-08-23 Dole Refrigerating Company Hot gas defrost system
KR20130088914A (ko) * 2012-01-31 2013-08-09 엘지전자 주식회사 냉장고 및 그 제상 운전 방법
KR20170013767A (ko) * 2015-07-28 2017-02-07 엘지전자 주식회사 냉장고
KR102065492B1 (ko) * 2018-12-05 2020-01-13 (주)에이씨알텍 이동식 냉장고
WO2020175831A1 (fr) * 2019-02-28 2020-09-03 엘지전자 주식회사 Procédé de commande de réfrigérateur

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