US20130340469A1 - Refrigerator - Google Patents

Refrigerator Download PDF

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Publication number
US20130340469A1
US20130340469A1 US13/924,187 US201313924187A US2013340469A1 US 20130340469 A1 US20130340469 A1 US 20130340469A1 US 201313924187 A US201313924187 A US 201313924187A US 2013340469 A1 US2013340469 A1 US 2013340469A1
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United States
Prior art keywords
heat exchanger
exchanger unit
unit
refrigerant
refrigerator
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Abandoned
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US13/924,187
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English (en)
Inventor
Seongjae KIM
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LG Electronics Inc
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LG Electronics Inc
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Assigned to LG ELECTRONICS INC. reassignment LG ELECTRONICS INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KIM, SEONGJAE
Publication of US20130340469A1 publication Critical patent/US20130340469A1/en
Abandoned legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
    • F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
    • F25D17/06—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation
    • F25D17/08—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation using ducts
    • 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
    • F25B1/00—Compression machines, plants or systems with non-reversible cycle
    • F25B1/10—Compression machines, plants or systems with non-reversible cycle with multi-stage compression
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
    • F25B47/02—Defrosting cycles
    • F25B47/022—Defrosting cycles hot gas defrosting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B5/00—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B5/00—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity
    • F25B5/02—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity arranged in parallel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • 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
    • F25D21/10—Removing frost by spraying with fluid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/04—Refrigeration circuit bypassing means
    • F25B2400/0403—Refrigeration circuit bypassing means for the condenser
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/04—Refrigeration circuit bypassing means
    • F25B2400/0411—Refrigeration circuit bypassing means for the expansion valve or capillary tube

Definitions

  • the present invention relates to refrigerators, and more particularly, to a refrigerator which can reduce power consumption of the refrigerator at the time of defrosting an evaporator.
  • the refrigerator used for frozen or refrigerated storage of food, is provided with a case which forms partitioned spaces defining a freezing chamber and a refrigerating chamber.
  • the refrigerator includes a compressor, a condenser, an evaporator, a capillary tube, and so on for forming a refrigerating cycle to lower temperatures of the freezing chamber and the refrigerating chamber.
  • the refrigerator performs refrigerating operation with a refrigerating cycle in which low temperature and low pressure gaseous refrigerant is compressed to high temperature and high pressure gaseous refrigerant by the compressor, the high temperature and high pressure gaseous compressed refrigerant is turned to high pressure liquid refrigerant as the high temperature and high pressure gaseous refrigerant passes through the condenser, the high pressure liquid refrigerant undergoes temperature and pressure drops as the high pressure liquid refrigerant passes through a capillary tube, and the refrigerant having the temperature and pressure dropped thus cools down air around the evaporator as the refrigerant is turned to low temperature and low pressure gaseous refrigerant while absorbing heat from the air around the evaporator.
  • a heater adjacent to the evaporator is used to defrost the evaporator.
  • defrosting using the heater causes a problem in that power consumption of the heater increases refrigerator power consumption.
  • the heater is operated excessively to introduce the heat from the heater to the refrigerating chamber or the freezing chamber, it is necessary to drive the compressor again for running the refrigerating cycle to once again reduce the temperature in the refrigerating chamber or the freezing temperature, which requires consumption of additional energy.
  • an object of the present invention is to provide a refrigerator which has no heater for defrosting the evaporator.
  • Another object of the present invention is, to provide a refrigerator which can reduce power consumption of the refrigerator in defrosting, more particularly, to provide a refrigerator which enables to run a refrigerating cycle by using energy consumed for defrosting.
  • a refrigerator includes a compressor unit for compressing refrigerant, a condensing unit for passing the refrigerant compressed thus, and a first heat exchanger unit and a second heat exchanger unit each for making heat exchange as the refrigerant passes therethrough, wherein, if a defrosting mode is performed for one of the first heat exchanger unit and a second heat exchanger unit, the refrigerant compressed at the compressor unit is supplied to one of the first heat exchanger unit and the second heat exchanger unit, and then the refrigerant is supplied to the other one of the first heat exchanger unit and the second heat exchanger unit after the refrigerant is passed through an expansion valve.
  • heat can be supplied to the first heat exchanger unit by the refrigerant, and cold can be supplied to the second heat exchanger.
  • heat can be supplied to the second heat exchanger unit by the refrigerant, and the cold can be supplied to the first heat exchanger.
  • the refrigerant can pass through an expansion valve between the first heat exchanger unit and the second heat exchanger unit.
  • one of the first heat exchanger unit and the second heat exchanger unit can become a high temperature part having a relatively high temperature, and the other one of the first heat exchanger unit and the second heat exchanger unit can become a low temperature part having a relatively low temperature.
  • the refrigerant which does not pass through the condensing unit can pass through one of the first heat exchanger unit and the second heat exchanger unit.
  • the refrigerant passed through the condensing unit can be introduced to the first heat exchanger unit after passing through the expansion valve.
  • the refrigerant passed through the condensing unit can be introduced to the second heat exchanger unit after passing through the expansion valve.
  • the refrigerant can be introduced to one of the first heat exchanger unit and the second heat exchanger unit selectively after the refrigerant passes through the condensing unit.
  • the first heat exchanger unit can be provided for supplying the cold to a refrigerating chamber
  • the second heat exchanger unit can be provided for supplying the cold to a freezing chamber
  • the compressor unit can include a first compressor unit for supplying the refrigerant to the first heat exchanger unit in the cold supply mode, and a second compressor unit for supplying the refrigerant to the second heat exchanger unit.
  • the second compressor unit can supply the refrigerant in order of the first heat exchanger unit and the second heat exchanger unit, and, in the defrosting mode on the second heat exchanger unit, the first compressor unit can supply the refrigerant in order of the second heat exchanger unit and the first heat exchanger unit.
  • the second heat exchanger unit can be provided with a cold accumulation unit having a phase change material placed therein, and the cold accumulation unit can be provided to supplement the cold to the freezing chamber or the refrigerating chamber.
  • FIG. 1 illustrates a diagram showing a state where a cold supply mode is performed in accordance with an exemplary embodiment of the present invention
  • FIG. 2 illustrates a diagram showing a state for implementing a defrosting mode of a second heat exchanger unit in FIG. 1 is performed
  • FIG. 3 illustrates a diagram showing a state for implementing a defrosting mode of a first heat exchanger unit in FIG. 1 is performed
  • FIG. 4 illustrates a diagram showing a state where a cold supply mode is performed in accordance with another exemplary embodiment of the present invention
  • FIG. 5 illustrates a diagram showing a state for implementing a defrosting mode of a second heat exchanger unit in FIG. 4 is performed
  • FIG. 6 illustrates a diagram showing a state for implementing a defrosting mode of a first heat exchanger unit in FIG. 4 is performed.
  • FIG. 7 illustrates a diagram showing a state where a cold supply mode is performed in accordance with another exemplary embodiment of the present invention.
  • a word of “cold” used in this specification as a noun has a meaning opposite to a word of “heat” used as a noun which means warmth or hotness.
  • FIG. 1 illustrates a diagram showing a state where a cold supply mode is performed in accordance with an exemplary embodiment of the present invention.
  • the refrigerator includes a compressor unit 10 for compressing the refrigerant, a condensing unit 20 for passing the compressed refrigerant, and a first heat exchanger unit 24 and a second heat exchanger unit 28 for making heat exchange as the refrigerant passes therethrough.
  • a plurality of pipelines connect various valves, the condensing unit 20 , the compressor unit 10 , the first heat exchanger unit 24 , and the second heat exchanger unit 28 to allow movement of refrigerant.
  • the compressor unit 10 may include a first compressor unit 12 for supplying the refrigerant to the first heat exchanger unit 24 and a second compressor unit 14 for supplying the refrigerant to the second heat exchanger unit 28 in a cold supply mode.
  • the cold supply mode is a regular refrigerator operation state in which the cold is supplied to an inside of the refrigerator through the first heat exchanger unit 24 or the second heat exchanger unit 28 .
  • the cold is supplied to the inside of the refrigerator through the first heat exchanger unit 24
  • the cold is supplied to the inside of the refrigerator through the second heat exchanger unit 28 .
  • the first heat exchanger unit 24 may be provided to supply the cold to the refrigerating chamber, and the second heat exchanger unit 28 may be provided to supply the cold to the freezing chamber. That is, the refrigerating chamber may be cooled by the cold supplied from the first heat exchanger unit 24 , and the freezing chamber may be cooled by the cold supplied from the second heat exchanger unit 28 .
  • the first heat exchanger unit 24 may be an element matched to a refrigerating chamber evaporator and the second heat exchanger unit 28 may be an element matched to a freezing chamber evaporator.
  • the first compressor unit 12 may be driven when the cold is supplied to the refrigerating chamber evaporator, which is the first heat exchanger unit 24
  • the second compressor unit 14 may be driven when the cold is supplied to the freezing chamber evaporator, which is the second heat exchanger unit 28 .
  • a system for implementing a cold supply mode in which the cold is supplied to the refrigerating chamber will be described. If the refrigerant is compressed by the first compressor unit 12 , the refrigerant is guided to the condensing unit 20 by a first three-way valve 30 . Heat exchange of the refrigerant occurs at the condensing unit 20 . Then, the refrigerant may pass through an expansion valve 22 for the first heat exchanger unit by the second three-way valve 32 , and be guided to the first heat exchanger unit 24 . That is, since heat exchange occurs at the first heat exchanger unit 24 , the cold can be supplied to the refrigerating chamber through the first heat exchanger unit 24 . The refrigerant passing through the first heat exchanger unit 24 may be guided to the first compressor unit 12 to implement the refrigerating cycle.
  • the cold supply mode in which the cold is supplied to the refrigerating chamber has a concept the same with the cold supply mode of the first heat exchanger unit 24 .
  • the refrigerant passing through the condensing unit 20 is introduced to the first heat exchanger unit 24 after the refrigerant passes through the expansion valve 22 for the first heat exchanger unit.
  • the compressed refrigerant can pass the first compressor unit 12 without any change.
  • the compressed refrigerant at the second compressor unit 14 may be further compressed at the first compressor unit 12 .
  • a compression load on the second compressor unit 14 can be reduced.
  • the refrigerant is compressed at the second compressor unit 14 and the first compressor unit 12 , a compression performance can be improved.
  • the refrigerant passes through the condensing unit 20 by the first three-way valve 30 .
  • the refrigerant may be guided to the expansion valve 26 for the second heat exchanger unit and forwarded to the second heat exchanger unit 28 by the second three-way valve 32 . Since heat exchange occurs at the second heat exchanger unit 28 , the cold can be supplied to the freezing chamber.
  • the refrigerant passing through the second heat exchanger unit 28 may be guided to the second compressor unit 14 again to implement the refrigerating cycle.
  • the cold supply mode in which the cold is supplied to the freezing chamber has a concept the same with the cold supply mode of the second heat exchanger unit 28 .
  • the refrigerant passing through the condensing unit 20 is introduced to the second heat exchanger unit 28 after the refrigerant passes through an expansion valve 26 for the second heat exchanger unit.
  • the cold can be supplied to the freezing chamber or the refrigerating chamber by the second three-way valve 32 .
  • the refrigerant passing through the compressor unit 10 may be introduced to any one of the first heat exchanger unit 24 or the second heat exchanger unit 28 after the refrigerant passes through the condensing unit 20 , selectively.
  • FIG. 2 illustrates a diagram showing a state for implementing a defrosting mode of a second heat exchanger unit according to the exemplary embodiment shown in FIG. 1 .
  • defrosting of the second heat exchanger unit 28 can be performed.
  • the first compressor unit 12 is put into operation to compress the refrigerant.
  • the compressed refrigerant is guided to the second heat exchanger unit 28 through the first three-way valve 30 .
  • a pipeline is connected between the first three-way valve 30 and the second heat exchanger unit 28 .
  • the refrigerant guided to the second compressor unit 28 After passing through the first three-way valve, the refrigerant guided to the second compressor unit 28 is at a relatively high temperature because the refrigerant does not pass through the expansion valve before the refrigerant passes through the second heat exchanger unit 28 . Since the refrigerant compressed at the first compressor unit 12 has a reduced volume, the refrigerant has an increased temperature. Therefore, as heat is supplied to the second heat exchanger unit 28 , the second heat exchanger unit 28 can be heated to a relatively high temperature. As a result, ice stuck to the second heat exchanger unit 28 can be melted to defrost the second heat exchanger unit 28 .
  • the refrigerant passing through the second heat exchanger unit 28 is guided to the first heat exchanger unit 24 after passing through a check valve 36 .
  • the refrigerant passes the expansion valve 22 for the first heat exchanger unit before the refrigerant passes through the first heat exchanger unit 24 . Therefore, the refrigerant is changed at the expansion valve 22 for the first heat exchanger unit to enable the refrigerant to supply the cold to the first heat exchanger unit 24 .
  • the refrigerant can cool the refrigerating chamber connected to the first heat exchanger unit 24 as the refrigerant passes through the first heat exchanger unit 24 .
  • the refrigerator of the present invention puts the first compressor unit 12 into operation to compress the refrigerant for defrosting the second heat exchanger unit 28 .
  • the cold is supplied to the first heat exchanger unit 24 by using the compressed refrigerant, a space in communication with the first heat exchanger unit 24 can be cooled.
  • the refrigerator of the present invention utilizes energy for defrosting the second heat exchanger unit 28 for implementing the refrigerating cycle of the first heat exchanger unit 24 , energy efficiency can be improved.
  • the refrigerator of this exemplary embodiment can use the energy, not only for defrosting, but also for supplying the cold to other parts.
  • the second heat exchanger unit 28 becomes a relatively high temperature part.
  • FIG. 3 illustrates a diagram showing a state for implementing a defrosting mode of a first heat exchanger unit in FIG. 1 is performed.
  • defrosting of the first heat exchanger unit 24 can be performed.
  • the second compressor unit 14 is put into operation to compress the refrigerant.
  • the compressed refrigerant is not passed through the first compressor unit 12 , but is guided to the first heat exchanger unit 24 . Since the first compressor unit 12 is not in operation, the refrigerant compressed at the second compressor unit 14 cannot pass the first compressor unit 12 , but can move to the first heat exchanger unit 24 .
  • the refrigerant guided to the first heat exchanger unit 24 is at a relatively high temperature state because the refrigerant does not pass through the expansion valve before the refrigerant passes through the first heat exchanger unit 24 . Since the refrigerant compressed at the first compressor unit 12 has a reduced volume, the refrigerant has an increased temperature. Therefore, as heat is supplied to the first heat exchanger unit 24 , the first heat exchanger unit 24 can be heated to a relatively high temperature. As a result, ice stuck to the first heat exchanger unit 24 may be melted to defrost the first heat exchanger unit 24 .
  • the refrigerant passing through the first heat exchanger unit 24 is guided to the second heat exchanger unit 28 .
  • the refrigerant passes through a first two-way valve 34 mounted to a pipeline which is connected between the first heat exchanger unit 24 and the expansion valve 26 for the second heat exchanger unit.
  • the first two-way valve 34 opens a flow passage for the refrigerant to pass through.
  • the refrigerant passes through the expansion valve 26 for the second heat exchanger unit before the refrigerant passes through the second heat exchanger unit 28 . Therefore, the refrigerant is changed at the expansion valve 26 for the second heat exchanger unit for the refrigerant to supply the cold to the second heat exchanger unit 28 .
  • the refrigerant can cool down the freezing chamber connected to the second heat exchanger unit 28 as the refrigerant passes through the second heat exchanger unit 28 .
  • the refrigerator according to this exemplary embodiment puts the second compressor unit 14 into operation to compress the refrigerant for defrosting the first heat exchanger unit 24 .
  • the cold is supplied to the second heat exchanger unit 28 by using the compressed refrigerant, a space in communication with the second heat exchanger unit 28 can be cooled.
  • the refrigerator of the present invention utilizes energy for defrosting the first heat exchanger unit 24 for implementing the refrigerating cycle on the second heat exchanger unit 28 , energy efficiency can be improved.
  • the refrigerator of this exemplary embodiment can use the energy, not only for defrosting, but also for supplying the cold to other parts.
  • the first heat exchanger unit 24 becomes a relatively high temperature part.
  • the refrigerator of this exemplary embodiment can supply the cold from the first heat exchanger unit 24 or the second heat exchanger unit 28 to which the refrigerant is introduced after the refrigerant passes through the relevant expansion valve.
  • the refrigerator of the present invention can defrost the first heat exchanger unit 24 or the second heat exchanger unit 28 .
  • FIG. 4 illustrates a diagram showing a state where a cold supply mode is performed in accordance with another exemplary embodiment of the present invention.
  • the refrigerator in accordance with this second exemplary embodiment is different from the first exemplary embodiment described above because only a single compressor unit is provided.
  • a plurality of valves are provided in a system that is different from the system according to the first exemplary embodiment; however, the systems are similar in that the various valves and elements are connected with pipelines through which the refrigerant can move.
  • a cold supply mode will be described, in which the cold is supplied to the first heat exchanger unit 24 .
  • the refrigerant compressed by the compressor unit 10 is guided to the condensing unit 20 through a four-way change over valve 40 .
  • the refrigerant is guided to the first heat exchanger unit 24 through a third three-way valve 42 .
  • the refrigerant passes through the expansion valve 22 for the first heat exchanger unit before the refrigerant moves to the first heat exchanger unit 24 . According to this, the cold can be supplied to an inside of the refrigerator through the first heat exchanger unit 24 .
  • the refrigerant passing through the first heat exchanger unit 24 is guided to the compressor unit 10 through a second two-way valve 44 .
  • the second two-way valve 44 opens a flow passage of a pipeline connected between the first heat exchanger unit 24 and the compressor unit 10 .
  • a third two-way valve 48 connected between the compressor unit 10 and the second heat exchanger unit 28 closes a passage of a pipeline. According to this, the refrigerant is not guided to the pipeline having the third two-way valve 48 mounted thereto, but guided to the compressor unit 10 to provide a refrigerating cycle.
  • a cold supply mode in which the cold is supplied to the second heat exchanger unit 28 .
  • the refrigerant compressed by the compressor unit 10 is guided to the condensing unit 20 through the four-way change over valve 40 .
  • the refrigerant is guided to the second heat exchanger unit 28 through the third three-way valve 42 .
  • the refrigerant passes through the expansion valve 26 for the second heat exchanger unit before the refrigerant moves to the second heat exchanger unit 28 . According to this, the cold can be supplied to an inside of the refrigerator through the second heat exchanger unit 28 .
  • the refrigerant passing through the second heat exchanger unit 28 thus is guided to the compressor unit 10 through the third two-way valve 48 .
  • the third two-way valve 48 opens a flow passage of a pipeline connected between the second heat exchanger unit 28 and the compressor unit 10 .
  • the second two-way valve 44 connected between the compressor unit 10 and the first heat exchanger unit 24 closes a passage of a pipeline. According to this, the refrigerant is not guided to the pipeline having the second two-way valve 44 mounted thereto, but guided to the compressor unit 10 to embody a refrigerating cycle, finally.
  • a fourth two-way valve 46 mounted to a pipeline connected between the first heat exchanger unit 24 and the expansion valve 26 for the second heat exchanger unit closes a flow passage of the pipeline.
  • FIG. 5 illustrates a diagram showing a state for implementing a defrosting mode of a second heat exchanger unit in FIG. 4 is performed.
  • the refrigerant compressed at the compressor unit 10 is guided to the second heat exchanger unit 28 after passing through the four-way change over valve 40 .
  • the refrigerant does not pass through the expansion valve 26 for the second heat exchanger unit and the condensing unit 20 before the refrigerant is guided to the second heat exchanger unit 28 . Since the refrigerant compressed at the compressor unit 10 moves, the second heat exchanger unit 28 , having heat transferred thereto, can be heated to a high temperature, relatively.
  • the refrigerant is guided to a pipeline having a check valve 49 mounted thereto.
  • the third two-way valve 48 mounted to the pipeline connected between the second heat exchanger unit 28 and the compressor unit 10 closes the flow passage, the refrigerant is not guided to the pipeline having the third two-way valve 48 mounted thereto.
  • the refrigerant After passing through the check valve 49 , the refrigerant is guided to the first heat exchanger unit 24 through the expansion valve 22 for the first heat exchanger. In this case, since the refrigerant emits the cold, the first heat exchanger unit 24 can supply the cold. Since the second two-way valve 44 opens a flow passage, the refrigerant is guided to the compressor unit 10 after passing through the second two-way valve 44 . Opposite to this, since the third two-way valve 48 is arranged to close the flow passage, the refrigerant is not guided to the third two-way valve 48 , but is lead to the compressor unit 10 . Similar to above, the fourth two-way valve 46 mounted to a pipeline connected between the first heat exchanger unit 24 and the expansion valve 26 for the second heat exchanger unit closes the flow passage for preventing the refrigerant from flowing to the pipeline.
  • the first heat exchanger unit 24 becomes the low temperature part since the first heat exchanger unit 24 has a relatively low temperature. Therefore, ice and the like stuck to the second heat exchanger unit 28 can be removed.
  • the compressor unit 10 In order to defrost the second heat exchanger unit 28 , the compressor unit 10 is put into operation, and, the cold can be supplied to the first heat exchanger unit 24 by using the refrigerant compressed by the compressor unit 10 . According to this, energy efficiency can be improved.
  • FIG. 6 illustrates a diagram showing a state for implementing a defrosting mode of a first heat exchanger unit in FIG. 4 is performed.
  • the refrigerant compressed by the compressor unit 10 is guided to the first heat exchanger unit 24 by the four-way change over valve 40 .
  • the refrigerant does not pass through the condensing unit 20 or the expansion valve 22 for the first heat exchanger unit before the refrigerant is guided to the first heat exchanger unit 24 .
  • the second two-way valve 44 mounted to the pipeline connected between the first heat exchanger unit 24 and the compressor unit 10 closes the flow passage.
  • the fourth two-way valve 46 mounted to the pipeline connected between the first heat exchanger unit 24 and the expansion valve 26 for the second heat exchanger unit opens the flow passage. According to this, the refrigerant is guided, not to pass through the second two way valve 44 , but to pass the fourth two-way valve 46 .
  • the refrigerant After passing through the expansion valve 26 for the second heat exchanger unit, the refrigerant is guided to the second heat exchanger unit 28 .
  • the third two-way valve 48 connected between the compressor unit 10 and the second heat exchanger unit 28 opens the third two-way valve 48 .
  • the refrigerant passing through the second heat exchanger unit 28 is guided to the compressor unit 10 through the pipeline having the third two-way valve 48 mounted thereto.
  • the second heat exchanger unit 28 becomes the low temperature part since the second heat exchanger unit 28 has a relatively low temperature. Therefore, ice and the like stuck to the first heat exchanger unit 24 can be removed.
  • the compressor unit 10 In order to defrost the first heat exchanger unit 24 , the compressor unit 10 is put into operation, and, the cold can be supplied to the second heat exchanger unit 28 by using the refrigerant compressed by the compressor unit 10 . According to this, energy efficiency can be improved.
  • FIG. 7 illustrates a diagram showing a state where a cold supply mode is performed in accordance with another exemplary embodiment of the present invention.
  • the refrigerator in accordance with another exemplary embodiment of the present invention in FIG. 7 includes a cold accumulation unit 60 in the second heat exchanger unit 28 .
  • the cold accumulation unit 60 may have a PCM (Phase Change Material) placed therein.
  • the PCM has a phase changing from liquid to gas, from solid to gas, or from gas to solid at a certain temperature. Even though a material shows no temperature change at a melting point or a boiling point, since the material absorbs or discharges much energy for changing the state of the material, the PCM can be used for storage of energy within a particular temperature range.
  • a cold supply mode for supplying the cold to the first heat exchanger unit 24 will be described.
  • the compressor unit 10 is put into operation to compress the refrigerant, and the compressed refrigerant is guided to the condensing unit 20 through a fourth three-way valve 50 .
  • the refrigerant is guided to the first heat exchanger unit 24 to supply the cold thereto.
  • the refrigerant is guided to the compressor unit 10 through a fifth three-way valve 52 to embody the refrigerating cycle.
  • the compressor unit 10 is put into operation to compress the refrigerant, and the compressed refrigerant is guided to the condensing unit 20 through the fourth three-way valve 50 . Then, the refrigerant is guided to the first heat exchanger unit 24 after passing through the expansion valve 22 for the first heat exchanger unit to supply the cold thereto. Then, after passing through the fifth three-way valve 52 , the refrigerant is guided to the expansion valve 26 for the second heat exchanger unit. After passing through the expansion valve 26 for the second heat exchanger unit, the refrigerant moves to the second heat exchanger unit 28 . Therefore, the refrigerant supplies the cold to the second heat exchanger unit 28 , too.
  • the second heat exchanger unit 28 since the second heat exchanger unit 28 is in contact with the cold accumulation unit 60 , the cold can be accumulated at the cold accumulation unit 60 .
  • the cold accumulation unit 60 may be provided to the freezing chamber or the refrigerating chamber.
  • the second heat exchanger unit 28 may be mounted to the refrigerating chamber, to supply the cold to the refrigerating chamber.
  • the first heat exchanger unit 24 may be mounted to the freezing chamber for supplying the cold to the freezing chamber. Since the cold accumulation unit 60 is mounted to the refrigerating chamber, if the refrigerating cycle is not in operation by the compressor unit 10 , the cold accumulated at the cold accumulation unit 60 may be supplied to the refrigerating chamber.
  • the cold accumulation unit 60 may be provided to the freezing chamber.
  • the second heat exchanger unit 28 supplies the cold to the cold accumulation unit 60 for storage of the cold therein.
  • the first heat exchanger unit 24 may be mounted, to the refrigerating chamber for supplying the cold to the refrigerating chamber, or to the freezing chamber for supplying the cold to the freezing chamber.
  • the cold accumulation unit 60 is mounted to the freezing chamber, if the refrigerating cycle is not in operation by the compressor unit 10 , the cold accumulated at the cold accumulation unit 60 may be supplied to the freezing chamber.
  • a defrosting mode of the first heat exchanger unit 24 in accordance with another exemplary embodiment of the present invention will be described.
  • the refrigerant compressed by the compressor unit 10 is guided to the first heat exchanger unit 24 through the fourth three-way valve 50 .
  • the refrigerant guided to the first heat exchanger unit 24 does not pass through the condensing unit 20 and the expansion valve 22 for the first heat exchanger unit.
  • the first heat exchanger unit 24 may form the high temperature part which has a relatively high temperature.
  • the defrosting on the first heat exchanger unit 24 can be achieved.
  • the refrigerant passing through the first heat exchanger unit 24 is guided to the expansion valve 26 for the second heat exchanger unit through the fifth three-way valve 52 . Then, the refrigerant may be guided to the second heat exchanger unit 28 to supply the cold to the second heat exchanger unit 28 . In this case, since the refrigerant supplies the cold to the second heat exchanger unit 28 , the second heat exchanger unit 28 can form the low temperature part which has a relatively low temperature.
  • the refrigerator of the present invention can reduce power consumed during defrosting of the evaporator.
  • the refrigerator of the present invention can improve energy efficiency of the refrigerator because a refrigerating cycle can be embodied by utilizing energy consumed for performing the defrosting.
  • the refrigerator of the present invention permits to supply the cold to one of the refrigerating chamber and the freezing chamber while defrosting the other one of the refrigerating chamber and the freezing chamber.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Defrosting Systems (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
US13/924,187 2012-06-22 2013-06-21 Refrigerator Abandoned US20130340469A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020120067111A KR101962129B1 (ko) 2012-06-22 2012-06-22 냉장고
KR10-2012-0067111 2012-06-22

Publications (1)

Publication Number Publication Date
US20130340469A1 true US20130340469A1 (en) 2013-12-26

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US13/924,187 Abandoned US20130340469A1 (en) 2012-06-22 2013-06-21 Refrigerator

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US (1) US20130340469A1 (ko)
EP (1) EP2677252B1 (ko)
KR (1) KR101962129B1 (ko)

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US20180010825A1 (en) * 2015-01-23 2018-01-11 Lg Electronics Inc. Refrigerator
CN113189829A (zh) * 2020-01-29 2021-07-30 精工爱普生株式会社 投影仪
JP2021117454A (ja) * 2020-01-29 2021-08-10 セイコーエプソン株式会社 プロジェクター
CN115540408A (zh) * 2021-06-30 2022-12-30 青岛海尔电冰箱有限公司 用于冷藏冷冻装置的制冷系统及冷藏冷冻装置
WO2024131041A1 (zh) * 2022-12-20 2024-06-27 青岛海尔空调器有限总公司 换热系统、空调和冷藏一体机及其控制方法、控制装置

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KR102298724B1 (ko) * 2014-05-19 2021-09-06 주식회사 대창 제빙기 및 그 제어 방법
KR20160011001A (ko) 2014-07-21 2016-01-29 엘지전자 주식회사 냉장고 및 그 제어방법
EP3175184B1 (en) * 2014-07-31 2018-03-21 Arçelik Anonim Sirketi Refrigeration appliance having freezer evaporator defrost circuit
KR102518478B1 (ko) * 2016-01-05 2023-04-06 엘지전자 주식회사 냉장고
EP3225941A1 (en) * 2016-03-31 2017-10-04 Mitsubishi Electric Corporation Heat pump system with rapid defrosting mode
TR201612430A2 (tr) * 2016-09-02 2018-03-21 Arcelik As Portati̇f i̇kli̇mlendi̇rme ci̇hazi
KR102439937B1 (ko) * 2020-11-13 2022-09-02 조병재 냉동탑차용 샌드위치 축냉 패널 냉동기

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US10330351B2 (en) * 2015-01-23 2019-06-25 Lg Electronics Inc. Refrigerator
CN113189829A (zh) * 2020-01-29 2021-07-30 精工爱普生株式会社 投影仪
JP2021117453A (ja) * 2020-01-29 2021-08-10 セイコーエプソン株式会社 プロジェクター
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CN115540408A (zh) * 2021-06-30 2022-12-30 青岛海尔电冰箱有限公司 用于冷藏冷冻装置的制冷系统及冷藏冷冻装置
WO2023273740A1 (zh) * 2021-06-30 2023-01-05 青岛海尔电冰箱有限公司 用于冷藏冷冻装置的制冷系统及冷藏冷冻装置
WO2024131041A1 (zh) * 2022-12-20 2024-06-27 青岛海尔空调器有限总公司 换热系统、空调和冷藏一体机及其控制方法、控制装置

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KR101962129B1 (ko) 2019-07-17
EP2677252B1 (en) 2022-09-21
KR20140000368A (ko) 2014-01-03
EP2677252A1 (en) 2013-12-25

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