WO2023287036A1 - Procédé de commande de fonctionnement pour réfrigérateur - Google Patents

Procédé de commande de fonctionnement pour réfrigérateur Download PDF

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Publication number
WO2023287036A1
WO2023287036A1 PCT/KR2022/008429 KR2022008429W WO2023287036A1 WO 2023287036 A1 WO2023287036 A1 WO 2023287036A1 KR 2022008429 W KR2022008429 W KR 2022008429W WO 2023287036 A1 WO2023287036 A1 WO 2023287036A1
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WO
WIPO (PCT)
Prior art keywords
temperature
heat
evaporator
storage compartment
refrigerator
Prior art date
Application number
PCT/KR2022/008429
Other languages
English (en)
Korean (ko)
Inventor
김호산
이호연
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 KR1020210090874A external-priority patent/KR20230010864A/ko
Priority claimed from KR1020210090866A external-priority patent/KR20230010382A/ko
Application filed by 엘지전자 주식회사 filed Critical 엘지전자 주식회사
Publication of WO2023287036A1 publication Critical patent/WO2023287036A1/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
    • 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 heating heat sources installed in the evaporator, and when the defrosting operation is performed by the heat generated by these heating heat sources, the cooling operation for each storage compartment is stopped.
  • the defrosting method using a heating heat source does not perform uniform defrosting and requires more heating than necessary, which causes an increase in the internal temperature of the refrigerator, which adversely affects foods 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 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 is inevitable.
  • An object of the present invention is to shorten the operating time for providing heat to an evaporator, thereby reducing the rise in temperature inside the furnace due to the heat supply.
  • Another object of the present invention is to improve the heating performance of the first evaporator by supplying the high-temperature refrigerant compressed in the compressor to the first evaporator in a state where the temperature drop is minimized.
  • Another object of the present invention is to quickly supply enough refrigerant to the first evaporator so that the first storage compartment can be quickly cooled when the heat supply operation is finished.
  • a general cooling operation in which cooling is performed while supplying cold air to each storage compartment, a heat supply operation in which heat is supplied to the first evaporator, and a heat supply operation performed before Heat transfer operation may be included.
  • the cooling fan provided to cool the condenser during the normal cooling operation and the heat supply operation can be controlled to be driven together with the operation of the compressor.
  • the cooling fan provided to cool the condenser may be controlled not to operate until the heat exchange process is completed even if the compressor is operated.
  • the heat supply operation may include a heating process in which the heating heat source generates heat.
  • the heat supply operation may include a heat exchange process in which heat is provided by hot gas (high-temperature refrigerant).
  • the heating process of the heat supply operation may be performed with priority over the heat exchange process.
  • the heat generation condition of the heat generation process may include a case where the temperature FD of the first evaporator is equal to or higher than the temperature F in the first storage compartment.
  • the temperature FD of the first evaporator may include the temperature of the refrigerant outlet side of the first evaporator.
  • the temperature FD of the first evaporator may include the cold air outflow side temperature of the first evaporator.
  • a stop process of stopping the operation of the compressor from the end of the heat supply operation until the start of the heat supply operation may be included.
  • supply of cold air to the second storage compartment may be cut off after the heat supply operation is finished until the heat supply operation is 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.
  • heat generation when the heating heat source satisfies the heat generation termination condition, heat generation may be stopped.
  • the heat generation termination condition may include a case where the temperature of the first evaporator reaches the set first temperature X1.
  • 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 can be performed while the high-temperature refrigerant compressed in the compressor through the hot gas flow path is guided to flow sequentially through the first evaporator and the second evaporator.
  • the refrigerant passing through the first evaporator during the heat exchange process may flow into the second evaporator after adjusting its physical properties.
  • the heat exchange process may be performed when the hot gas supply condition is satisfied after the heat transfer operation of each storage compartment is started.
  • 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.
  • the hot gas supply condition in the heat exchange process may include a case where the first evaporator temperature reaches the set second temperature X2 after the heat transfer operation of each storage compartment is completed.
  • the compressor may be stopped when the heat supply operation ends and then operated when the hot gas supply condition is satisfied.
  • the blowing fan for the first storage compartment for circulating cold air in the first storage compartment may be stopped.
  • the blowing fan for the second storage compartment for circulating cold air in the second storage compartment can be controlled to operate.
  • the heat exchange process of the heat supply operation may be terminated when the heat exchange termination condition is satisfied.
  • the heat exchange termination condition may include a case where the temperature of the first evaporator reaches the set first temperature X1.
  • the heat exchange termination condition may include a case where the temperature in the second storage chamber reaches a satisfactory temperature.
  • the satisfactory temperature may include a temperature equal to or less than the lower limit reference temperature set based on the set reference temperature of the second storage compartment.
  • the heat exchange termination condition may include a case where a set time elapses from when the heating heat source generates heat.
  • the compressor may be stopped when the heat exchange termination condition is satisfied.
  • the supply of refrigerant to the hot gas flow path may be cut off when the heat exchange termination condition is satisfied.
  • the refrigerator of the present invention provides heat to the first evaporator by generating heat from a heating source and supplying a high-temperature refrigerant (hot gas).
  • a heating source for supplying heat to the first evaporator using only hot gas.
  • the operation time required to provide heat can be shortened, the temperature rise of the first storage compartment can be reduced as much as possible, or the temperature recovery of the first storage compartment can be reduced as much as possible. power consumption can be reduced.
  • the compressor and the blowing fan for the second storage compartment operate together.
  • heat supply to the first evaporator using hot gas and cooling to the second storage compartment can be simultaneously performed.
  • the cooling fan is controlled to stop during the heat exchange process of the heat supply operation.
  • the high-temperature refrigerant compressed by the compressor is supplied to the first evaporator without a sudden drop in temperature to heat the first evaporator.
  • a pump down operation is performed in which the compressor continues to operate for a predetermined time while the flow path switching valve is closed.
  • the heat supply operation is terminated when the temperature R of the second storage compartment deviates from the satisfactory temperature.
  • overcooling of the second storage compartment caused by excessive cooling of the second evaporator can be prevented.
  • the refrigerator of the present invention preferentially heats the first evaporator when the heat generation condition of the heating source is satisfied even during the rest process after the heat supply operation and before the heat supply operation. Thus, the time for the heat supply operation is shortened.
  • the heating heat source when the first evaporator temperature (FD) is equal to the first storage compartment temperature (F), the heating heat source generates heat. This minimizes unnecessary power consumption.
  • 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 related to a heat supply 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 for each storage compartment of a refrigerator according to an embodiment of the present invention.
  • FIG. 11 is a flowchart illustrating a process of heat transfer operation of a refrigerator according to an embodiment of the present invention.
  • FIG. 12 is a flowchart illustrating a process during a heat supply operation of a refrigerator according to an embodiment of the present invention.
  • FIG. 13 is a flowchart illustrating another example of a process during a heat supply operation of a refrigerator according to an embodiment of the present invention.
  • FIG. 14 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
  • 15 is a flowchart illustrating a process of temperature return operation of a refrigerator according to an embodiment of the present invention.
  • FIGS. 1 to 15 a preferred embodiment of a refrigerator and an operation control method thereof according to 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.
  • 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.
  • the refrigerator according to the embodiment of the present invention can perform the heat supply operation (S220) by simultaneously using the heating heat source 310 and hot gas (high-temperature refrigerant).
  • S220 heat supply operation
  • hot gas high-temperature refrigerant
  • 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 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 of the first storage compartment 101 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 of the second storage compartment 102 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).
  • the supply of cold air to each of the storage compartments 101 and 102 is continued or stopped according to the upper or lower limit temperature of the first set reference temperatures NT11 or NT21.
  • the 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 compartments 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).
  • a refrigerator includes a refrigeration system.
  • the cold air that can be maintained at the first set reference temperatures NT11 and NT21 is supplied to each of the storage compartments 101 and 102 by the refrigeration system.
  • 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 that has passed through each passage (eg, a first passage and a second passage, or a hot gas passage, etc.) and guide it to the compressor 210 .
  • each passage eg, a first passage and a second 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 may be located in the machine room 103 in the refrigerator body 100 .
  • a cooling 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 cooling fan 221 may be controlled to stop during a heat supply operation in which heat is provided to the first evaporator 250 using a high-temperature refrigerant (hot gas). That is, in order to supply hot gas (high-temperature refrigerant) for providing heat to the first evaporator 250, the high-temperature refrigerant compressed in the compressor 210 is not condensed while passing through the condenser 220, but directly into the first evaporator. (250). To this end, during the heat supply operation, the cooling fan 221 may be controlled to stop even if the compressor 210 is operated.
  • a high-temperature refrigerant hot gas
  • 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 passes through the second evaporator 260 and exchanges heat with air (cold air) flowing in the second storage chamber 102 .
  • 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 passage 201.
  • 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 passage 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 into the second evaporator 260 via the first evaporator 250 through the hot gas flow path 320 . 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 property control 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 controller 270 may be provided as a pipe through which the refrigerant flows.
  • 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 of the flow paths 201 , 202 , and 320 are branched from the discharge flow path 203 . That is, the refrigerant flowing into the discharge passage 203 by the operation of the flow passage switching valve 330 is transferred to either the first refrigerant passage 201, the second refrigerant passage 202, or the hot gas passage 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 320 .
  • the hot gas flow path 320 provides high-temperature heat to a place where heat is needed.
  • the hot gas flow path 320 guides the high-temperature refrigerant (hot gas) compressed by the compressor 210 and passing through the condenser 220 (refrigerant that is not heat-exchanged). That is, the hot gas (high-temperature refrigerant) guided by the hot gas passage 320 provides high-temperature heat.
  • the hot gas passage 320 is formed to guide the refrigerant flow 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 passage 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 .
  • the heat provided by the heating heat source 310 or the hot gas flow path 320 may be used in various ways.
  • 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 located adjacent to either side 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 is an operation for cooling the first storage compartment 101 and the second storage compartment 102 according to the first set reference temperatures NT11 and NT21, respectively, as shown in the flowchart of FIG.
  • a general cooling operation is performed while cold air is supplied or the supply of cold air is stopped.
  • 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 blowing fan 281 for the first storage compartment 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.
  • a cooling fan (C-Fan) 221 is operated so that the refrigerant passing through the condenser 220 exchanges heat with air passing through the condenser 220 .
  • the refrigerant is condensed while the temperature is lowered while passing through the condenser 220 .
  • the blowing fan 281 for the first storage compartment is operating.
  • 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 exchanges heat with the first evaporator 250 while passing through the first evaporator 250 and is supplied into the first storage compartment 101 at a lower temperature to lower the temperature in the first storage compartment 101.
  • the compressor 210, the cooling fan 221, and the blowing fan 282 for the second storage compartment are operated.
  • the flow path switching valve 330 is operated so that cold air flows through the second refrigerant flow path 202 . This is the same as the attached figure 10.
  • 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 while passing through the second expander 240 by the guidance of the second refrigerant flow path 202. Inflated.
  • the refrigerant passes through the second evaporator 260, exchanges heat with air flowing around the refrigerant, flows into the compressor 210 through the return passage 211, and repeats a circulation operation in which it is compressed.
  • the cooling fan 221 operates so that the refrigerant passing through the condenser 220 exchanges heat with the air passing through the condenser 220 .
  • the refrigerant is condensed while the temperature is lowered while passing through the condenser 220 .
  • the blowing fan 291 for the second storage compartment is operating.
  • 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 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). That is, when the temperature of each of the storage compartments 101 and 102 is increased while the heat supply operation (S220) is being performed, the storage items in each of the storage compartments 101 and 102 may be adversely affected. Accordingly, the heat supply operation (S210) is performed before the heat supply operation (S220) is performed to sufficiently cool the storage compartments 101 and 102.
  • the heat transfer operation (S210) is performed to sequentially cool the first storage compartment 101 and the second storage compartment 102 (S211 and S212).
  • each of the storage compartments 101 and 102 is cooled (Deep cooling) can be operated.
  • the second set reference temperatures NT12 and NT22 may be set to temperatures different from the first set reference temperatures NT11 and NT21 during the normal cooling operation (S100).
  • 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 temperatures NT12 and NT22 may be set to the same temperature as the first set reference temperatures NT11 and NT21.
  • the first lower limit reference temperatures NT11-Diff and NT21-Diff may be set to different temperatures from the second lower limit reference temperatures NT12-Diff and NT22-Diff.
  • 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.
  • blowing fan 291 for the second storage compartment and the blowing fan 281 for the first storage compartment are sequentially operated.
  • the refrigerant flows into the first refrigerant passage 201 by the operation of the passage switching valve 330, and the compressor 210 and the cooling fan 221 And the blowing fan 281 for the first storage compartment is operated.
  • the refrigerant flows into the second refrigerant passage 202 by the operation of the flow path switching valve 330, and the compressor 210, the cooling fan 221, and the The blowing fan 291 for the second storage compartment is operated.
  • the heat transfer operation (S210) may be performed so that the second storage compartment 102 is first 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 in the heat transfer operation (S210).
  • the pump When the cooling of the first storage chamber 101 in the heat transfer operation (S210) is completed (S213), the pump may be controlled to be down. That is, when the cooling of the first storage compartment 101 is completed (S213) 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 certain period of time. Accordingly, the refrigerant collected in the second evaporator 260 may be recovered to the compressor 210 . Accordingly, when the heat exchange process (S223) 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 is prevented by providing the pause process (S216). This is the same as the attached FIGS. 7 and 11.
  • the pause process (S216) may be set by time. For example, after cooling of the first storage compartment 101 is completed (S213), a pause process (S216) may be performed for a predetermined time before the heat supply operation (S220) is performed.
  • 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 room blowing fan 281 supplies cold air to the first storage room 101 when the first evaporator temperature FD reaches the first storage room temperature F. It can operate until That is, when the temperature FD of the first evaporator reaches the temperature F of the first storage compartment, the blowing fan 281 for the first storage compartment is stopped (S215).
  • the blowing fan 281 for the first storage compartment generates heat from the heating heat source 310 after the compressor 210 is stopped, rather than before the compressor 210 is stopped when the cooling of the first storage compartment 101 is completed (S213). It may be rotated at a higher speed until the condition is satisfied (S214). That is, maximizing the flow rate circulating in the first storage chamber 101 after the compressor 210 is stopped until the heating heat source 310 is operated is advantageous in shortening the heating time (eg, the defrosting time of the first evaporator). Do.
  • the cooling of the first storage compartment 101 is completed (S213) and before the compressor 210 is stopped, the rotation speed of the blowing fan 281 for the first storage compartment is performed to cool the first storage compartment 101 during normal cooling operation. It may be set to be slower than or equal to the rotation speed to be set.
  • supply of cold air to the second storage chamber 102 may be blocked until the heat supply operation (S220) is performed after the heat supply operation (S210) is finished.
  • a method of blocking the cold air supply may be performed 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) is an operation that provides 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.
  • This heat supply operation (S220) may be performed when the operation conditions are satisfied. For example, 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 (S210) is performed first, and then the heat supply operation (S220) is performed. can be performed
  • 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 by supplying power to the heating heat source 310 when the heating condition for heating the first evaporator 250 is satisfied after the heat supply operation (S210) of each storage compartment 101 and 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 (deep cooling 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
  • a case where the first evaporator temperature (FD) is equal to or higher than the first storage compartment temperature (F) may be included. That is, during the heat transfer operation (S210) or after the heat transfer operation (S210) is completed, the first evaporator temperature (FD) is checked (S221) so that the first evaporator temperature (FD) is the first storage compartment temperature (F). If it is equal to or higher than ), it is determined that the heating condition is satisfied, and the heating heat source 310 heats up (ON) (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 heating heat source 310 When the heating heat source 310 generates heat (ON) by satisfying the heat generating condition described above, 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 minimum idle time of the compressor 210 does not elapse, heat generation of the heating source 310 is delayed until the minimum idle time has elapsed. It is preferable to set it so that it is. For example, if 2 minutes have not elapsed after the heat supply operation (S210) is finished, even if the first evaporator temperature (FD) reaches the first storage compartment temperature (F), the heating heat source 310 will not pass the 2 minutes. It can be set to delay heat generation until
  • the heat supply operation (S220) may include a heat exchange process of providing heat to the first evaporator 250 using circulation of the refrigerant.
  • heat can be provided up to a desired temperature more quickly than when heat is provided to the first evaporator 250 only with the heating heat source 310, resulting from the operation of the heating heat source 310. This is to reduce power consumption.
  • This heat exchange process is performed by operating the compressor 210 with the hot gas flow path 320 open after the pause process (S216) for a set time (eg, 3 minutes) is completed at the end of the heat transfer operation (S210). (S223). That is, the high-temperature refrigerant generated by the operation of the compressor 210 passes through the condenser 220 and flows along the hot gas flow path 320 to the first evaporator 250 without passing through the first expander 230. The first evaporator 250 is heated. The refrigerant heated in the first evaporator 250 is returned to the compressor 210 after passing through the second evaporator 260 in a reduced pressure state through the physical property control unit 270 .
  • the refrigerant passing through the discharge passage 203 of the condenser 220 is guided to flow along the hot gas passage 320 by the operation of the flow path switching valve 330.
  • the cooling fan 221 when the heat exchange process is performed, the cooling fan 221 is controlled not to operate despite the operation of the compressor 210 . At this time, the cooling fan 221 may be controlled not to be driven until the corresponding heat exchange process is completed.
  • the refrigerant compressed in the compressor 210 can be provided to the first evaporator 250 in a state in which the temperature does not decrease while passing through the condenser 220, and the first evaporator 250 converts the high-temperature refrigerant into can be heated.
  • the second storage compartment can be controlled to be cooled while heating the first evaporator 250 with hot gas (high-temperature refrigerant) as shown in the flowchart of FIG. 13 attached thereto. .
  • This can be performed by also operating the R-Fan 291 for the second storage compartment.
  • the refrigerant passing through the first evaporator 250 passes through the physical property control unit 270 and is decompressed, and then passes through the second evaporator 260. Heat is exchanged with the air in the second storage compartment 102.
  • the heat-exchanged air is provided to the second storage compartment 102 to lower the temperature in the second storage compartment 102 . That is, when the first evaporator 250 is heated by the heat exchange process, the second storage compartment 102 is cooled, so that the operation for cooling the second storage compartment 102 can be omitted when the heat supply operation is finished. As a result, the first storage compartment 101 can be quickly cooled, the time for cooling the first storage compartment 101 is shortened, and power consumption can be reduced.
  • the blowing fan 291 for the second storage compartment is stopped when the heating of the first evaporator 250 is finished.
  • the heat exchange process by the refrigerant (S223) may be performed prior to the heating process (S222) or later than the heating process (S222) 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 may be performed when the hot gas supply condition of each of the storage compartments 101 and 102 is satisfied. That is, the compressor 210 is restarted when the hot gas supply condition is satisfied after the heat supply operation (S210) is completed and the compressor 210 is stopped.
  • 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 may be determined that the hot gas supply condition is satisfied.
  • the heating heat source 310 when the heat of the heating heat source 310 affects the first evaporator 250, 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 ( S210 ) of each storage chamber ( 101 , 102 ) ends. 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, it can be determined that the hot gas supply condition is satisfied when the first evaporator temperature FD reaches the set second temperature X2 (FD ⁇ X2°C) after the heat transfer operation (S210) is finished.
  • 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 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 cooling fan 221 may be controlled to stop until the heat exchange process (S223) ends even if the compressor 210 is operated.
  • the temperature drop (heat loss) caused by the operation of the cooling fan 221 is prevented, so that the highest-temperature refrigerant is transferred to the first evaporator ( 250) so that it can be provided.
  • the blowing fan 281 for the first storage compartment may be controlled to stop. That is, it is to prevent the temperature rise of the first evaporator 250 from being slow due to the operation of the blowing fan 281 for the first storage compartment.
  • the blowing fan 291 for the second storage compartment may be controlled to operate. That is, when the refrigerant flows along the hot gas flow path 320, the cooling fan 291 for the second storage compartment is operated so that the cold air in the second storage compartment 102 passes through the second evaporator 260 and exchanges heat. . As a result, while heating the first evaporator 250 , a process of supplying cold air to the second storage chamber 102 can be simultaneously performed.
  • 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 reaches 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 end condition is satisfied, and the power supplied to the heating source 310 is cut off.
  • the first temperature X1 is a temperature in consideration of damage to stored objects due to a temperature rise of the first storage compartment 101, and may be set to, for example, 5°C.
  • the first temperature X1 described above 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 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 chamber 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 passage 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 heat exchange process may be terminated while the refrigerant supply to the hot gas flow path 320 is cut off.
  • the blowing fan 291 for the second storage compartment may be stopped.
  • the supply of refrigerant to the hot gas flow path 320 may be cut off when the compressor 210 is stopped.
  • the first evaporator 250 is in a high temperature state
  • the second evaporator 260 is in a low temperature state.
  • the heat exchange process is finished and the compressor 210 is stopped.
  • Refrigerant flows. Accordingly, when the refrigerant is supplied to the first evaporator 250 for the cooling operation of the first storage compartment 102 after the heat exchange process is finished, a delay in the flow of the refrigerant to the first evaporator 250 occurs, and consumption Efficiency decreases.
  • the refrigerant collected in the second evaporator 260 is recovered to the compressor 210 by performing a pump down operation (S226) to additionally operate the compressor 210 while the flow of the refrigerant is blocked. Accordingly, when the cooling operation for the first storage chamber 101 of the temperature return operation (S230) is performed, the high-temperature refrigerant can be quickly and sufficiently supplied to the first evaporator 250.
  • 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 compartment 101, the temperature of which has risen in the heat supply operation (S220), 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 flow path switching valve 330 is operated so that cold air flows through the first refrigerant flow path 201.
  • the compressor 210 and the cooling fan 221 operate together. As a result, a flow of refrigerant sequentially circulating through the compressor 210, the condenser 220, the first expander 230, and the first evaporator 250 is performed while cooling the first storage compartment 101.
  • the blowing fan 281 for the first storage compartment When the operation for cooling the first storage compartment 101 is performed, the blowing fan 281 for the first storage compartment may be operated.
  • the blowing fan 281 for the first storage compartment may be operated from when the first evaporator temperature (FD) becomes lower than the first storage compartment temperature (F). As a result, the temperature F of the first storage compartment may gradually decrease.
  • defrosting primary defrosting
  • the blowing fan 291 for the second storage compartment is maintained in an inoperative state.
  • the blowing fan 291 for the second storage compartment since the blowing fan 291 for the second storage compartment is not operated, the second evaporator 260 is naturally defrosted.
  • the operation of the blowing fan 291 for the second storage compartment may be stopped until the second evaporator temperature RD is equal to or higher than the first set temperature.
  • the first set temperature may be set to 3°C.
  • the flow path switching valve 330 is operated so that the second refrigerant flow path 202 is opened (refrigerant flows through the second refrigerant flow path), and the blowing fan 291 for the second storage compartment is operated. and the blowing fan 281 for the first storage compartment is stopped.
  • the pump-down (S235) may be performed for a predetermined time.
  • the refrigerator of the present invention provides heat to the first evaporator 250 by generating heat from the heating source 310 and supplying hot gas.
  • the operation time required to provide heat can be shortened and the temperature rise of the first storage compartment 101 can be reduced compared to the case of providing heat to the first evaporator 250 using only the high-temperature refrigerant.
  • the refrigerator of the present invention is controlled so that the cooling fan 221 is not driven during the heat exchange process (S223) of the heat supply operation (S220), the high-temperature refrigerant compressed by the compressor 210 does not rapidly decrease in temperature.
  • the evaporator 250 may be heated. As a result, the operating time of the heating heat source 310 is reduced, thereby reducing power consumption.
  • the compressor 210 is operated and the blowing fan 291 for the second storage compartment is controlled to operate at the same time, so that the first refrigerator using a high-temperature refrigerant is operated.
  • Heat supply to the evaporator 250 and cooling of the second storage chamber 102 can be performed simultaneously.
  • the flow path switching valve 330 is closed while the compressor 210 continues to operate for a certain period of time. Down) (S226) is performed. For this reason, when the heat exchange process (S223) of the heat supply operation (S220) is performed, the high-temperature refrigerant can be quickly and sufficiently supplied to the first evaporator (250).
  • the heat supply operation (S220) of cooling the second evaporator 260 while providing heat to the first evaporator 250 is terminated when the temperature of the second storage compartment 102 exceeds the desired temperature. Since it is controlled, overcooling of the second storage compartment 102 caused by excessive cooling of the second evaporator 260 can be prevented.
  • the refrigerator of the present invention operates the first evaporator 250 when the heating condition of the heating heat source 310 is satisfied even during the stop process (S216) before the heat supply operation (S220) after the heat supply operation (S210) is performed. Since it is made to heat first, it is possible to shorten the time for the entire heat supply operation (S220).
  • the heating condition of the heating heat source 310 includes a case where the first evaporator temperature FD is equal to the first storage compartment temperature F, the exact time of heat generation of the heating heat source 310 can be specified.
  • 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, ice-breaking of an ice maker, prevention of frost formation on a door, prevention of overcooling in each storage compartment 101, 102, etc.) can
  • the hot gas flow path 320 is not divided into a first pass 321, a second pass 322, and a third pass 323 and has the same outer diameter (or inner diameter). It can be formed as a single 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 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.

Abstract

Un réfrigérateur de la présente invention peut réaliser une opération de fourniture de chaleur par utilisation simultanée d'une source de chaleur de chauffage et d'un gaz chaud. La présente invention peut donc : économiser du temps de fonctionnement utilisé pour fournir de la chaleur; limiter l'augmentation de température dans une première chambre de stockage; et réduire la consommation d'énergie de récupération de température de la première chambre de stockage.
PCT/KR2022/008429 2021-07-12 2022-06-14 Procédé de commande de fonctionnement pour réfrigérateur WO2023287036A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR1020210090874A KR20230010864A (ko) 2021-07-12 2021-07-12 냉장고의 운전 제어방법
KR1020210090866A KR20230010382A (ko) 2021-07-12 2021-07-12 냉장고의 운전 제어방법
KR10-2021-0090866 2021-07-12
KR10-2021-0090874 2021-07-12

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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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