WO2018076584A1 - 冰箱 - Google Patents

冰箱 Download PDF

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Publication number
WO2018076584A1
WO2018076584A1 PCT/CN2017/074590 CN2017074590W WO2018076584A1 WO 2018076584 A1 WO2018076584 A1 WO 2018076584A1 CN 2017074590 W CN2017074590 W CN 2017074590W WO 2018076584 A1 WO2018076584 A1 WO 2018076584A1
Authority
WO
WIPO (PCT)
Prior art keywords
evaporator
compartment
cooling
refrigerator
freezing
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/CN2017/074590
Other languages
English (en)
French (fr)
Inventor
馆野恭也
丰岛昌志
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Qingdao Haier Co Ltd
Haier Asla Co Ltd
Original Assignee
Qingdao Haier Co Ltd
Haier Asla Co Ltd
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
Application filed by Qingdao Haier Co Ltd, Haier Asla Co Ltd filed Critical Qingdao Haier Co Ltd
Priority to EP17864181.7A priority Critical patent/EP3531048A4/en
Priority to US16/344,358 priority patent/US11150006B2/en
Publication of WO2018076584A1 publication Critical patent/WO2018076584A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25DREFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D17/00Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
    • F25D17/04Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
    • F25D17/042Air treating means within refrigerated spaces
    • F25D17/045Air flow control arrangements
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B5/00Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25DREFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D17/00Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
    • F25D17/04Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
    • F25D17/06Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation
    • F25D17/062Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation in household refrigerators
    • F25D17/065Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation in household refrigerators with compartments at different temperatures
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25DREFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D19/00Arrangement or mounting of refrigeration units with respect to devices or objects to be refrigerated, e.g. infrared detectors
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25DREFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D19/00Arrangement or mounting of refrigeration units with respect to devices or objects to be refrigerated, e.g. infrared detectors
    • F25D19/003Arrangement or mounting of refrigeration units with respect to devices or objects to be refrigerated, e.g. infrared detectors with respect to movable containers
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25DREFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D21/00Defrosting; Preventing frosting; Removing condensed or defrost water
    • F25D21/002Defroster control
    • F25D21/004Control mechanisms
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25DREFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D21/00Defrosting; Preventing frosting; Removing condensed or defrost water
    • F25D21/04Preventing the formation of frost or condensate
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25DREFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D29/00Arrangement or mounting of control or safety devices
    • F25D29/003Arrangement or mounting of control or safety devices for movable devices
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2347/00Details for preventing or removing deposits or corrosion
    • F25B2347/02Details of defrosting cycles
    • F25B2347/021Alternate defrosting
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2400/00Component parts or details not otherwise provided for in this subclass
    • F25B2400/04Refrigeration circuit bypassing means
    • F25B2400/0409Refrigeration circuit bypassing means for evaporators
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00Control issues
    • F25B2600/25Control of valves
    • F25B2600/2511Evaporator distribution valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2700/00Sensing or detecting of parameters; Sensors therefor
    • F25B2700/15Power, e.g. by voltage or current
    • F25B2700/151Power, e.g. by voltage or current of the compressor motor
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25DREFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D11/00Self-contained movable devices, e.g. domestic refrigerators
    • F25D11/02Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures
    • F25D11/022Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures with two or more evaporators
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25DREFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2600/00Control issues
    • F25D2600/06Controlling according to a predetermined profile
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25DREFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2700/00Means for sensing or measuring; Sensors therefor
    • F25D2700/02Sensors detecting door opening
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25DREFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2700/00Means for sensing or measuring; Sensors therefor
    • F25D2700/12Sensors measuring the inside temperature
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25DREFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2700/00Means for sensing or measuring; Sensors therefor
    • F25D2700/12Sensors measuring the inside temperature
    • F25D2700/122Sensors measuring the inside temperature of freezer compartments
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25DREFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2700/00Means for sensing or measuring; Sensors therefor
    • F25D2700/14Sensors measuring the temperature outside the refrigerator or freezer

Definitions

  • the invention relates to a refrigerator which stores and stores foods in a storage room, and more particularly relates to a refrigerator having a forced circulation evaporator and a direct cooling evaporator.
  • a refrigerator that forcibly circulates air cooled by an evaporator in a storage chamber (for example, Japanese Laid-Open Patent Publication No. 2011-58689 (pages 6-7, 2).
  • the evaporator is disposed inside the cooling chamber spaced apart from the storage compartment, and the air cooled by the evaporator is sent out by the fan and supplied to the storage compartment through the supply duct.
  • the storage compartment is usually divided into a plurality of storage compartments such as a refrigerating compartment and a freezing compartment, and the amount of cold air supplied to each storage compartment is controlled by opening and closing a damper or the like provided on the supply duct. Further, in order to melt the frost on the evaporator, heating is performed by an electric heater or the like, or shutdown defrosting, hot air defrosting, or the like is performed.
  • the refrigerator of the above-described conventional technology can be further improved from the viewpoint of reducing energy consumption, achieving further energy saving, and maintaining food quality.
  • the conventional circulation type refrigerator has the following problems. That is: the amount of frost on the evaporator is large, and the number of defrosting increases. When the frost is applied to the defrosting melt evaporator, the use of an electric heater or the like causes power consumption. Further, as the defrosting increases, the temperature in the storage compartment rises, and the refrigeration load increases, resulting in an increase in the amount of power consumption for cooling the storage compartment. Therefore, in order to achieve energy saving, it is necessary to prevent frosting on the evaporator to reduce the number of times of defrosting operation.
  • a conventional direct-cooling type refrigerator has less frosting on the evaporator and a lower drying degree in the storage chamber than the forced circulation type refrigerator.
  • problems such as difficulty in defrosting the evaporator.
  • the evaporator in which the evaporator is provided on the inner wall of the storage compartment or inside, if the temperature of the evaporator is raised in order to melt the frost, it is easy to raise the temperature in the storage chamber. Therefore, the cooling load after defrosting increases, and the amount of power consumption also increases.
  • an electric heater or the like is required to prevent the defrosting water from being frozen again in the storage chamber.
  • Such an electric heater or the like for preventing freezing not only consumes electric power, but also increases the cooling load and increases the amount of electric power consumption by cooling.
  • an object of the present invention is to provide a refrigerator which is excellent in energy saving, can suppress drying of a storage compartment, reduce the number of defrosting, and reduce the amount of power consumption.
  • an embodiment of the present invention provides a refrigerator having: a storage compartment divided into at least a refrigerating compartment and a freezing compartment; and a first evaporator disposed in the cooling compartment, the cooling compartment Connecting to the storage chamber through a supply duct; a second evaporator disposed inside the freezing chamber; a switching valve for switching whether a refrigerant flows to a refrigerant passage connecting the second evaporator; Having the cooled air in the first evaporator flow from the cooling chamber to the storage compartment; a first air duct opener inserted into the supply air duct connected to the refrigerating compartment; A duct opener that is inserted into the supply duct connected to the freezing compartment.
  • the refrigerator has: a first refrigerant passage sequentially connecting the switching valve, a first adjusting unit, the first evaporator; and a second refrigerant passage, which are sequentially connected The switching valve, the second regulating unit, the second evaporator, and the first evaporator.
  • the switching valve is for connecting a refrigerant passage on a condenser outlet side to the first refrigerant passage or the second refrigerant passage.
  • the refrigerator has a load detecting unit for detecting the storage room refrigeration load, and switching the switching valve when a refrigeration load detected by the load detecting unit is less than a specific value.
  • the refrigerant is caused to flow to the second evaporator, and the freezing chamber is directly cooled.
  • the fan in the direct cooling operation of the freezer compartment, the fan is stopped and the second air duct opener is closed.
  • the fan in the direct cooling operation of the freezer compartment, the fan is stopped, and after the second air duct opener is closed for a given time, the fan is operated again to open The second air duct opener.
  • the present invention has the following beneficial technical effects:
  • a refrigerator comprising: a forced circulation type first evaporator disposed in a cooling chamber; a direct cooling type second evaporator disposed inside the freezing chamber; and a switching valve for switching a refrigerant passage; A duct opener is inserted into the supply duct connected to the refrigerating compartment; and the second duct opener is inserted into the supply duct connected to the freezing compartment.
  • the compressor is operated, and the second evaporator pair can be utilized without operating the fan. Cooling in the freezer.
  • the frosting on the first evaporator can be reduced, and the freezing chamber can be prevented from being excessively dried, so that the frequency of running the defrosting is reduced compared to the conventional forced circulation type refrigerator.
  • the power consumption of the fan can be reduced.
  • the switching valve to cause the refrigerant to flow to the first evaporator, and opening the second duct opener connected to the freezer compartment, the compressor and the fan are operated, and the first evaporator can be used to cool the freezer compartment.
  • the frost can be condensed on the first evaporator, thereby reducing the frost on the second evaporator, so that the number of defrosting of the second evaporator is reduced compared with the conventional direct cooling type refrigerator.
  • it is possible to suppress the increase in the temperature in the freezing chamber while reducing the amount of power consumption by the defrosting, and to maintain the quality of the food stored in the freezing compartment for a long period of time.
  • the cold room can be cooled by the melting heat of the first evaporator, and the cold room can be humidified by the moisture of the frost. In this way, it is possible to suppress the drying of the food in the refrigerating compartment while achieving energy-saving and high-efficiency cooling, thereby maintaining the quality of the food.
  • the refrigeration cycle is provided with: a first refrigerant passage, which is sequentially connected to the switching valve, the first regulating unit, and the first evaporator; and a second refrigerant passage, which is sequentially connected to the switching valve,
  • the second regulating unit, the second evaporator, and the first evaporator can switch the refrigerant passage on the outlet side of the condenser to be connected to one of the first refrigerant passage or the second refrigerant passage through the switching valve.
  • the switching valve By switching the switching valve to the first refrigerant passage, it is possible to cause the refrigerant to flow only to the first evaporator to perform the storage compartment cooling. That is, it is possible to cool the refrigerating compartment and the freezing compartment to a suitable temperature while preventing frosting on the second evaporator.
  • the first evaporator and the second evaporator can be connected in series, thereby utilizing the first direct cooling of the inside of the freezing chamber by the second evaporator, using the first The evaporator cools the circulating air and then dehumidifies it.
  • the first evaporator and the second evaporator while preventing condensation on the second evaporator, and to effectively cool the freezer compartment.
  • the refrigerant flowing out of the second evaporator flows to the first evaporator, so that the remaining liquid refrigerant can be stored in the first evaporator. In this way, it is possible to prevent the liquid refrigerant from flowing back to the compressor, and it is possible to reduce the internal volume of the accumulator or the like.
  • a refrigerator according to the present invention is provided with a load detecting unit for detecting a storage compartment refrigeration load, and when the refrigeration load detected by the load detecting unit is less than a specific value, switching the switching valve to cause the refrigerant to flow to the second evaporation Perform a direct cooling operation in the freezer compartment. In this way, it is possible to achieve efficient cooling of the freezer compartment by the second evaporator while preventing the freezer compartment from drying. In addition, it is possible to minimize frosting on the second evaporator.
  • the refrigerator in the direct cooling operation of the freezer compartment, by stopping the fan and closing the second duct opener, the forced circulation can be stopped, and only the second evaporator is used for the freezing compartment. In this way, more efficient cooling can be achieved while preventing the freezer from drying.
  • the refrigerator provided according to the present invention stops the fan in the direct cooling operation of the freezer compartment, and after a certain time elapses after the second air duct opener is closed, the fan is operated to open the second air duct opener.
  • the direct cooling operation of the freezer compartment air can be forcedly circulated between the freezing compartment and the cooling compartment, so that the frost is condensed on the first evaporator.
  • the frost is condensed on the first evaporator.
  • the moisture recovered by the first evaporator can be utilized in the humidifying operation of the refrigerating compartment.
  • FIG. 1 is a schematic structural view of a refrigerator according to an embodiment of the present invention.
  • FIG. 2 is a block diagram of a refrigerator control system shown in accordance with an embodiment of the present invention.
  • FIG. 3 is a control flow chart showing control of operation of a refrigerator according to an embodiment of the present invention.
  • FIG. 4 is a control flow chart showing control of operation of a refrigerator according to an embodiment of the present invention.
  • FIG. 5 is a control flow chart showing control of operation of a refrigerator according to an embodiment of the present invention.
  • FIG. 6 is a control flow chart showing control of operation of a refrigerator according to an embodiment of the present invention.
  • FIG. 7 is a control flow diagram showing control of operation of a refrigerator, in accordance with an embodiment of the present invention.
  • Fig. 1 is a schematic configuration diagram of a refrigerator 1 shown in accordance with the present embodiment.
  • a side cross-sectional view of the refrigerator 1 overlaps with a thumbnail of the refrigeration cycle 20.
  • the refrigerator 1 is mainly provided with a heat insulating box 2, and a storage compartment for storing food or the like is provided inside the heat insulating box 2.
  • the inside of the storage compartment is divided into two storage compartments having different storage temperatures, that is, the refrigerating compartment 3 in the refrigerating temperature range and the freezing compartment 4 in the freezing temperature domain.
  • the refrigerating compartment 3 is separated from the freezing compartment 4 located in the lower layer by a heat insulating partition wall 7.
  • the inside of the refrigerating compartment 3 and the freezing compartment 4 are provided with a shelf (not shown in the drawing) and a storage container (not shown) for storing foods and the like.
  • the structure of the heat insulating box 2 includes an outer box 2a made of a steel plate and having an opening at the front, and an inner box 2b made of synthetic resin and disposed in the outer box 2a with a gap therebetween.
  • the heat insulating material 2c is made of urethane foam, and is foamed and filled in a space between the outer casing 2a and the inner casing 2b.
  • An opening is provided in front of the heat insulating box 2, and the openings correspond to the refrigerating compartment 3 and the freezing compartment 4, respectively, and the tops 5 and 6 which are freely openable and closable are respectively provided.
  • a storage basket may be provided inside the boxes of the doors 5 and 6.
  • the refrigerator 1 is provided with a door opening and closing sensor 34 for detecting opening and closing of the doors 5, 6.
  • the storage compartment can be divided into finer partitions, for example, other storage compartments such as an ice making compartment and a fruit and vegetable compartment, and a plurality of doors are provided corresponding to the respective storage compartments. Further, a storage container or the like that can be pulled out integrally with each door may be provided in each storage chamber.
  • the rear surface and the top surface of the refrigerating compartment 3 form a supply duct 10 for introducing the air cooled by the first evaporator 22 described later into the interior of the refrigerating compartment 3.
  • the supply duct 10 refers to a space formed between the partition made of synthetic resin and the inner box 2b of the heat insulating box 2 which is formed on the back surface of the refrigerator compartment 3.
  • the partition body is provided with an air outlet for supplying cold air flowing into the supply duct 10 to the inside of the refrigerating compartment 3.
  • the back side of the freezing compartment 4 is provided with a supply duct 9 which is connected to the freezing compartment 4 and the supply duct 10.
  • a partition made of synthetic resin is interposed between the supply duct 9 and the freezing compartment 4.
  • the partition body is provided with an air outlet, from which the cold air flows to the freezing compartment 4, and the air outlet is provided with a freezing damper 12 (hereinafter referred to as "F damper 12") as a second duct opening and closing device.
  • F damper 12 freezing damper 12
  • a refrigerating damper 11 (hereinafter referred to as "R damper 11") as a first duct opening and closing device is provided on the supply duct 10 connected to the refrigerating compartment 3. That is, the supply duct 9 is connected to the supply duct 10 via the R damper 11.
  • the R damper 11 and the F damper 12 are an electric damper which is composed of a plate-like body and a drive motor, and the former is a shaft that can be freely rotated on one side to support the opening and closing cover.
  • the first air duct opener or the second air duct opener is not limited to these, and other types of opening and closing devices such as a sliding type opening and closing plate may be employed.
  • the F damper 12 By opening and closing the F damper 12, it is possible to adjust whether air flows from the supply duct 9 to the freezing compartment 4 or not.
  • the flow rate of the cold air supplied to the freezing compartment 4 can be adjusted by appropriately adjusting the opening and closing operation of the F damper 12.
  • the inside of the heat insulating box 2 is provided with a cooling chamber 8 which is spaced apart from the supply duct 9 by a separator made of synthetic resin.
  • the interior of the cooling chamber 8 is provided with a first evaporator 22 for cooling the air circulating inside the chamber. A detailed description of the first evaporator 22 will be described later.
  • a defrosting heater not shown in the drawing is provided as a defrosting unit for melting and removing the frost on the first evaporator 22. Further, a return port is provided below the cooling chamber 8 for returning air from the freezing chamber 4 to the cooling chamber 8.
  • the fan 13 is an axial fan having a rotatable propeller fan, a fan motor (not shown in the drawings), and a casing having a wind tunnel (not shown in the drawings).
  • the fan 13 may also employ, for example, a combination of a propeller fan and a motor without a bushing, and other types of fans such as a multi-blade fan.
  • a refrigerator compartment temperature sensor 18 (hereinafter referred to as “R sensor 18") is provided inside the refrigerator compartment 3 for detecting the temperature inside the refrigerator compartment 3.
  • a freezer compartment temperature sensor 19 is provided inside the freezing compartment 4 for detecting the temperature inside the freezing compartment 4 (hereinafter referred to as “F sensor 19").
  • the mounting position of the R sensor 18 and the F sensor 19 is not limited to the position shown in FIG.
  • the refrigerator 1 is further provided with an outside temperature sensor 33 for detecting the temperature outside the refrigerator.
  • the refrigerator 1 has a vapor compression refrigeration cycle 20 .
  • the refrigeration cycle 20 includes a compressor 21 for compressing the refrigerant, and a condenser 24 for compressing the high temperature and high pressure refrigerant to exchange heat with the outside air to condense the refrigerant.
  • a heat radiating fan (not shown) for supplying air to the compressor 21 and the condenser 24 and blowing air to the condenser 24 is disposed in a machine room located on the depth side below the refrigerator 1.
  • the refrigerant used in the refrigeration cycle 20 of the refrigerator 1 is isobutane. (R600a).
  • the refrigeration cycle 20 includes a first evaporator 22 disposed inside the cooling chamber 8 for performing forced circulation refrigeration, and a second evaporator 23 disposed inside the freezing chamber 4 for direct cooling Refrigeration.
  • the first evaporator 22 is, for example, a fin-and-tube heat exchanger in which the inside of the heat exchange tube is a refrigerant flow path.
  • the refrigerant flowing through the first evaporator 22 exchanges heat with the air flowing through the cooling chamber 8 and evaporates.
  • the air flowing through the cooling chamber 8 is cooled, and the cooled air is supplied to the refrigerating chamber 3 and the freezing chamber 4.
  • the first evaporator 22 may employ other types of heat exchangers, for example, heat exchangers using flat porous tubes and shaped tubes, and the like.
  • the second evaporator 23 may be a refrigerant flow path inside the heat exchange tube, and various heat exchangers such as a wire for promoting heat transfer and a fin tube may be provided outside the heat exchange tube.
  • the second evaporator 23 may be a so-called pressure-welded plate type heat exchanger in which a pair of steel sheets are bonded together to form a refrigerant flow path between the steel sheets. The refrigerant flowing through the second evaporator 23 exchanges heat with the air in the freezing compartment 4 and evaporates. In this way, the freezing compartment 4 is cooled.
  • the first evaporator 22 and the second evaporator 23 are respectively connected with a first adjusting unit 26 and a second adjusting unit 27 for compressing and expanding the high-pressure liquid refrigerant.
  • the upstream side of the first adjusting unit 26 and the second adjusting unit 27 is provided with a three-way valve 25 as a switching valve for switching the refrigerant passage, and selecting whether to cause the refrigerant to flow into the refrigerant passage connected to the second evaporator 23 (the Two refrigerant channels B).
  • the refrigeration cycle 20 includes a first refrigerant passage A that sequentially connects the three-way valve 25, the first regulator unit 26, the first evaporator 22, and a second refrigerant passage B that is sequentially connected to the three-way valve. 25.
  • the refrigerant passage on the outlet side of the condenser 24 can be connected to one side of the first refrigerant passage A or the second refrigerant passage B.
  • the three-way valve 25 may also close both the first refrigerant passage A and the second refrigerant passage B.
  • the first adjustment unit 26 and the second adjustment unit 27 may employ, for example, a capillary tube and an electronic expansion valve or the like.
  • an electronic expansion valve capable of completely closing the first adjustment unit 26 and the second adjustment unit 27 is employed, one of the first adjustment unit 26 and the second adjustment unit 27 may be selected to be placed in an open state, thereby The three-way valve 25 is omitted. That is, the electronic expansion valve as the first adjustment unit 26 and the second adjustment unit 27 can be utilized as a switching valve for switching the refrigerant passage. Further, an electromagnetic opening and closing valve or the like may be provided on each of the first refrigerant passage A and the second refrigerant passage B as a switching valve instead of the three-way valve 25.
  • FIG. 2 is a block diagram depicting a control system of the refrigerator 1. As shown in FIG. 2, the refrigerator 1 is provided with a control device 30 for controlling each component device.
  • the input side of the control device 30 is connected with an F sensor 19 for detecting the temperature of the freezing compartment 4 (refer to FIG. 1), an R sensor 18 for detecting the temperature of the refrigerating compartment 3 (refer to FIG. 1), and an operation panel 32 for the user.
  • F sensor 19 for detecting the temperature of the freezing compartment 4
  • R sensor 18 for detecting the temperature of the refrigerating compartment 3
  • operation panel 32 for the user.
  • Various set values are input; the outside temperature sensor 33 and the door opening and closing sensor 34.
  • the F sensor 19, the R sensor 18, the outside temperature sensor 33, and the door opening and closing sensor 34 are a type of load detecting unit of the control device 30 for detecting information required to calculate the cooling load. Further, as another load detecting means, the control device 30 also has a function of detecting the load (current, voltage) of the compressor 21.
  • the output side of the control device 30 is connected to an F damper 12, an R damper 11, a compressor 21, a fan 13, and a three-way valve 25.
  • the control device 30 is also connected with sensors and controlled devices not shown in other drawings.
  • the control device 30 performs a designation calculation based on the inputs of the F sensor 19, the R sensor 18, the operation panel 32, the outside temperature sensor 33, the door opening and closing sensor 34, and the like, thereby controlling the F damper 12, the R damper 11, the compressor 21, and the fan. 13 and three-way valve 25 and so on.
  • Fig. 3 is a flow chart for controlling the operation of the refrigerator 1, showing a control flow regarding the selection of the operation mode.
  • the control device 30 (refer to FIG. 2) is in the common high load mode M1, the energy saving mode M2, and the hybrid cooling mode. Select any mode in M3. Specifically, first, the control device 30 determines whether or not the necessary condition (S1) of the usual high load mode M1 is satisfied, and if the necessary condition is satisfied (S1: YES), the usual high load mode M1 is executed. If the necessary condition of the usual high load mode M1 is not satisfied (S1: NO), the control device 30 determines whether or not the energy saving mode M2 is executed (S2), and if the necessary condition of the energy saving mode M2 is satisfied (S2: YES), the energy saving is performed. Mode M2.
  • the control device 30 determines the mixed cooling mode M3 (S3). If the necessary condition is satisfied (S3: YES), the control device 30 selects the mixed cooling mode M3, and if the necessary condition is not satisfied (S3: NO), returns to step S1 and continues to select the operation mode.
  • the cooling load of the refrigerator 1 is employed as a standard for selecting an operation mode. That is, if the cooling load is greater than or equal to the specified standard value (first standard value) (S1: YES), the control device 30 executes the usual high load mode M1. Further, if the cooling load is smaller than the first standard value but greater than or equal to the specified standard value (second standard value) smaller than the first standard value (S2: YES), the control device 30 selects the energy saving mode M2. On the other hand, if the cooling load is smaller than the second standard value (S3: YES), the control device 30 selects the hybrid cooling mode M3.
  • first standard value specified standard value
  • second standard value specified standard value
  • the control device 30 selects the energy saving mode M2.
  • the control device 30 selects the hybrid cooling mode M3.
  • the cooling load value as a reference when the operation mode is selected is based on: the temperature of the refrigerating compartment 3 detected by the R sensor 18 shown in Fig. 1 or Fig. 2; the temperature of the freezing compartment 4 detected by the F sensor 19; and the temperature sensor outside the tank The detected outside temperature of the door; the opening and closing state of the doors 5 and 6 detected by the door opening and closing sensor 34; the load of the compressor 21; various setting values input through the operation panel 32, etc. . Further, the timer 31 of the control device 30, the learning function, and the like may be used to store the state of change of the cooling load, and the calculation of the predicted cooling load may be performed.
  • Fig. 4 is a flow chart for controlling the operation of the refrigerator 1, showing the control flow regarding the usual high load mode M1.
  • the cooled air in the first evaporator 22 shown in Fig. 1 is forcibly circulated to cool the refrigerating compartment 3 and the freezing compartment 4.
  • the F damper 12 is always opened, and the R damper 11 is opened and closed according to the temperature of the refrigerating compartment 3.
  • the control device 30 determines whether or not the cooling operation is performed by comparing the temperature in the freezing compartment 4 detected by the F sensor 19 with the specified set temperature TF (S10). .
  • the set temperature TF is a standard temperature for determining whether to start or end the refrigeration of the freezing compartment 4.
  • the set temperature TF term may be input as the designated set value F to be the standard for starting the freezing of the freezer compartment 4, or the predetermined set value F is input as the standard for ending the freezing of the freezer compartment 4.
  • the set value F is on and the set value F is a standard temperature determined according to the cooling load state and various setting values input through the operation panel 32 (refer to FIG. 2), and the value of the set value F is larger than the set value. F off.
  • the set value F is turned on and the set value F is turned off, which avoids frequent switching between the start of cooling and the stop of cooling, and achieves stable control.
  • step S10 if the temperature of the freezing compartment 4 is higher than the set temperature TF (S10: YES), the control device 30 inputs the set value F at the set temperature TF, and operates the compressor 21 and the fan 13, and the tee is turned The valve 25 is switched to the first refrigerant passage A, and the F damper 12 is opened (S11).
  • the refrigerant compressed by the compressor 21 into a high temperature and high pressure is exothermicly condensed in the condenser 24 (refer to FIG. 1), and then decompressed by the first regulating unit 26 (refer to FIG. 1), then compressed and expanded, and flows into the first Evaporator 22.
  • the first evaporator 22 the low-temperature liquid refrigerant evaporates, and the air in the cooling chamber 8 is cooled by heat exchange with the refrigerant. Thereafter, the cooled air is sent out by the blower 13 and supplied to the freezing compartment 4. Further, in step S11, by inputting the set value F off at the set temperature TF, it is possible to avoid the end of the cooling operation immediately after the compressor 21 and the fan 13 are operated.
  • control device 30 determines whether or not the refrigerator compartment 3 is to be cooled by comparing the temperature in the refrigerator compartment 3 detected by the R sensor 18 with the predetermined set temperature TR (S12).
  • the set temperature TR is a standard temperature for determining whether to start or end the refrigeration of the refrigerating compartment 3.
  • the set temperature value TR can be input as the standard for starting the refrigeration of the refrigerating compartment 3 or by inputting the designated set value R as the standard for ending the refrigerating compartment 3 cooling.
  • the set value R ON and the set value R are the standard temperatures determined according to the state of the cooling load and various setting values input through the operation panel 32, and the set value R is turned on more than the set value R.
  • the set value R is turned on and the set value R is set to set a certain value difference between the standard for starting the cooling and the standard for ending the cooling to avoid frequent repeated operation. Stop the action.
  • step S12 if the temperature of the refrigerating compartment 3 is higher than the set temperature TR (S12: YES), the control device 30 opens the R damper 11 and inputs the set value R to the set temperature TR term (S13). After the R damper 11 is opened, the cooled air in the first evaporator 22 flows into the refrigerating compartment 3, and the refrigerating compartment 3 is cooled. Further, when the set value R is input at the set temperature TR, the cooling of the refrigerating compartment 3 after the R damper 11 is opened can be prevented from being immediately ended, thereby preventing the R damper 11 from repeatedly repeating the opening and closing operation.
  • step S12 if the temperature of the refrigerating compartment 3 is lower than or equal to the set temperature TR (S12: NO), the control device 30 turns off the R damper 11, and inputs the set value R at the set temperature TR item. (S15). In this way, the supply of cold air to the refrigerating compartment is cut off. Further, the set temperature TR is set to be the standard temperature at which the cooling of the refrigerating compartment 3 is started, that is, the set value R is turned on.
  • step S10 if the temperature of the freezing compartment 4 is lower than or equal to the set temperature TF (S10: NO), the control device 30 inputs the set value F at the set temperature TF, and stops the compressor 21 and the fan. 13, the three-way valve 25 is closed, and the F-damper 12 is closed (S14). As a result, the cooling work will stop.
  • Fig. 5 is a flow chart for controlling the operation of the refrigerator 1, showing the control flow regarding the energy saving mode M2.
  • the cooled air in the first evaporator 22 shown in FIG. 1 is forcibly circulated to cool the refrigerating compartment 3 and the freezing compartment 4, and the R damper 11 and the F damper 12 are respectively cooled according to the refrigerating compartment 3 and The temperature of the chamber 4 is controlled to open and close.
  • the control device 30 (refer to FIG. 2) operates the compressor 21 and the blower 13, and switches the three-way valve 25 to the first refrigerant passage A (S20). In this way, the forced circulation refrigeration will be performed by the first evaporator 22.
  • the control device 30 determines whether or not the freezer compartment 4 is to be cooled by comparing the temperature in the freezer compartment 4 detected by the F sensor 19 with the set temperature TF (S21). If the temperature of the freezing compartment 4 is higher than the set temperature TF (S21: YES), the control device 30 opens the F damper 12 and inputs the set value F off at the set temperature TF. In this way, the cooled air in the first evaporator 22 will be supplied to the freezing compartment 4.
  • step S21 if the temperature of the freezing compartment 4 is lower than or equal to the set temperature TF (S21: NO), the control device 30 turns off the F damper 12, and inputs the set value F at the set temperature TF item ( S25). When the F damper 12 is closed, the refrigeration of the freezing compartment 4 is stopped.
  • the control device 30 determines the cumulative time during which the F-valve 12 is maintained in the open state (S23). Then, the control device 30 determines whether or not the accumulated time in which the F-valve 12 is maintained in the open state exceeds the F maximum cooling time (hereinafter referred to as "time Fmax") which is the designated upper limit value in which the F-valve 12 is maintained in the open state (S24).
  • time Fmax the F maximum cooling time
  • the control device 30 When the accumulated time in which the F damper 12 is maintained in the open state exceeds the time Fmax (S24: YES), the control device 30 turns off the F damper 12, and inputs the set value F at the set temperature TF (S25). After the F damper 12 is closed, the supply of cold air to the freezing compartment 4 will be stopped. In other words, when the accumulated time in which the F damper 12 is maintained in the open state exceeds the time Fmax, the control device 30 directly stops the freezing of the freezing compartment 4 regardless of the temperature of the freezing compartment 4, and switches to the next cooling operation.
  • step S1 when the accumulated time in which the F damper 12 is maintained in the open state does not exceed the time Fmax (S24: NO), the control device 30 returns to step S1 (refer to FIG. 3), and repeats the above-described control operation. That is, if the cooling load is equal (FIG. 3, S2: Yes), the temperature of the freezing compartment 4 is higher than the set temperature TF (S21: YES), and the freezing compartment 4 is continuously cooled by the forced circulation.
  • the control device 30 determines whether or not the refrigerating compartment 3 is to be cooled by comparing the temperature in the refrigerating compartment 3 detected by the R sensor 18 with the set temperature TR (S26). If the temperature of the refrigerating compartment 3 is higher than the set temperature TR (S26: YES), the control device 30 opens the R damper 11 and inputs the set value R at the set temperature TR item (S27). After the R damper 11 is opened, the air cooled in the first evaporator 22 flows into the refrigerating compartment 3, and the refrigerating compartment 3 is cooled.
  • control device 30 measures the cumulative time during which the R damper 11 is maintained in the open state (S28), and further determines whether the accumulated time exceeds the R maximum cooling time (hereinafter referred to as "time" at which the R upper limit of the damper 11 is maintained in the open state. Rmax”) (S29).
  • the control device 30 closes the R damper 11 (S30), maintains the accumulated time in which the R damper 11 is kept open, and maintains the F damper 12 in an open state. After the accumulated time is reset (S31), Returning to step S22, the F damper 12 is opened.
  • the control device 30 directly stops the cooling of the refrigerating compartment 3 regardless of the temperature of the refrigerating compartment 3, and switches to the freezing compartment 4 to perform cooling. In this way, the air cooled in the first evaporator 22 is alternately supplied to the refrigerating compartment 3 and the freezing compartment 4 in accordance with the designated time (time Fmax, time Rmax) by switching.
  • step S29 when the cumulative time in which the R damper 11 is maintained in the open state does not exceed the time Rmax (S29: NO), the control device 30 returns to the step S1, repeats the above-described control operation, and continues the refrigerating by the forced circulation. Room 3 performs refrigeration.
  • step S26 if the temperature of the refrigerating compartment 3 is lower than or equal to the set temperature TR (S26: NO), the control device 30 turns off the R damper 11, and inputs the set value R at the set temperature TR item (S32). In this way, the supply of cold air to the refrigerating compartment 3 will be cut off.
  • control device 30 compares the temperature in the freezing compartment 4 detected by the F sensor 19 with the set temperature TF (S33), and if the temperature of the freezing compartment 4 is higher than the set temperature TF (S33: YES), returns to In step S1, the above control action is repeated.
  • the control device 30 stops the compressor 21 and the blower 13, and closes the three-way valve 25. As a result, the cooling work will stop. Then, the control device 30 returns to the operation of step S1.
  • 6 and 7 are flowcharts for controlling the operation of the refrigerator 1, and show a control flow regarding the hybrid cooling mode M3.
  • forced circulation type cooling using the first evaporator 22 shown in Fig. 1 and direct cooling type cooling (freezer compartment direct cooling operation) using the second evaporator 23 are performed. That is, the refrigerating compartment 3 and the freezing compartment 4 are cooled by the first evaporator 22, and the freezing compartment 4 is cooled by the second evaporator 23.
  • the control device 30 operates the compressor 21 (S40), compares the temperature in the freezing compartment 4 detected by the F sensor 19 with the set temperature TF, and determines whether or not The freezing compartment 4 is to be cooled (S41).
  • the control device 30 switches the three-way valve 25 to the second refrigerant passage B, and inputs the set value F at the set temperature TF (S42). ).
  • the three-way valve 25 is switched to the second refrigerant passage B, and the refrigerant discharged from the condenser 24 (refer to FIG. 1) is depressurized by the second regulating unit 27 (refer to FIG. 1), and then flows into the second evaporator 23. In this way, the freezing chamber 4 is cooled by the second evaporator 23.
  • the refrigerant from the second evaporator 23 flows into the first evaporator 22, so that the remaining liquid refrigerant can be stored in the first evaporator 22. In this way, it is possible to prevent the liquid refrigerant from flowing back to the compressor 21.
  • control device 30 measures the time elapsed after the F-valve 12 is switched (S43), and further determines whether the time elapsed after the F-gate 12 is switched exceeds the specified standard value, that is, the time interval for switching the F-damper (hereinafter referred to as "time” t") (S44).
  • the control device 30 determines the opening and closing state of the F-damper 12 (S45), if the F-damper 12 is in the closed state (S45: Yes) Then, after the time elapsed after switching the F-damper 12 is reset, the fan 13 is operated at a low rotation speed, and the F-damper 12 is opened (S46).
  • the air of the freezing compartment 4 can be circulated to the cooling chamber 8 (refer to FIG. 1), so that the first evaporator 22 can be used for cooling.
  • the frost can be condensed on the first evaporator 22, thereby reducing the frost on the second evaporator 23.
  • the moisture recovered by the first evaporator 22 can be utilized for the humidifying operation of the refrigerating compartment 3.
  • step S45 when the F-damper 12 is in the open state (S45: NO), the control device 30 resets the time elapsed after switching the F-damper 12, stops the fan 13, and closes the F-damper 12 (S49). ). In this way, the freezing of the freezing compartment 4 by the first evaporator 22 is stopped, and the freezing compartment 4 is cooled only by the direct cooling refrigeration of the second evaporator 23. In this way, it is possible to achieve effective cooling while preventing excessive frosting on the first evaporator 22 and drying of the freezing compartment 4.
  • step S44 if the time elapsed after the F-valve 12 is switched has not reached the standard time t (S44: NO), the control device 30 maintains the opening and closing state of the F-damper 12 and the operating state of the blower 13.
  • the opening and closing of the F-damper 12 and the operation/stop operation of the blower 13 can be repeated according to the specified time t, thereby preventing the freezing compartment 4 from drying and reducing.
  • the first evaporator 22 and the second evaporator 23 are frosted to achieve energy saving.
  • step S47 measures the cumulative time during which the F-valve 12 is maintained in the open state, and further determines whether or not the accumulated time exceeds the time Fmax (S48).
  • the control device 30 returns to step S1 (refer to FIG. 3), and repeats the above-described control operation. That is, if the refrigeration load is equal (Fig. 3, S3: YES), the temperature of the freezing compartment 4 is higher than the set temperature TF (S41: YES), the direct cooling operation of the freezer compartment by the second evaporator 23 is continued.
  • step S48 when the accumulated time in which the F-valve 12 is maintained in the open state exceeds the time Fmax (S48: YES), or in step S41, the temperature of the freezing compartment 4 is lower than or equal to the set temperature TF (S41: No)
  • the control device 30 closes the F damper 12 as shown in FIG. 7, the three-way valve 25 is switched to the first refrigerant passage A. In this way, the supply of cold air to the freezing compartment 4 is stopped, while the direct cooling operation of the freezing compartment using the second evaporator 23 is stopped.
  • control device 30 inputs the set value F at the set temperature TF (S51), compares the temperature in the refrigerator compartment 3 detected by the R sensor 18 with the set temperature TR, and determines whether or not the refrigerator compartment 3 is to be cooled. (S52).
  • the control device 30 opens the R damper 11, operates the blower 13, and inputs the set value R at the set temperature TR (S53). As a result, the air cooled in the first evaporator 22 flows into the refrigerating chamber 3, and the refrigerating chamber 3 is cooled.
  • the control device 30 measures the cumulative time during which the R damper 11 is maintained in the open state (S54), and further determines whether or not the accumulated time exceeds the time Rmax (S55). When the accumulated time in which the R damper 11 is maintained in the open state exceeds the time Rmax (S55: YES), the control device 30 closes the R damper 11 (S56), and the cumulative time during which the R damper 11 is maintained in the open state and the accumulation of the F damper 12 in the open state are maintained. After the time and the time elapsed after switching the F-damper 12 is reset (S57), as shown in FIG. 6, the process returns to step 42, and the three-way valve 25 is switched to the second refrigerant passage B.
  • the switching is performed according to the designated time (time Fmax, time Rmax), and the forced circulation refrigeration of the refrigerating compartment 3 using the first evaporator 22 and the direct cooling of the freezing compartment 4 using the second evaporator 23 are alternately performed. .
  • step S55 when the cumulative time in which the R damper 11 is maintained in the open state does not exceed the time Rmax (S55: NO), the control device 30 returns to step S1 (refer to FIG. 3) and repeats In the above control operation, the refrigerating compartment 3 is continuously cooled by the forced circulation.
  • step S52 if the temperature of the refrigerating compartment 3 is lower than or equal to the set temperature TR (S52: NO), the control device 30 turns off the R damper 11, stops the fan 13, and inputs the set value at the set temperature TR item. R is on (S58). In this way, the supply of cold air to the refrigerating compartment 3 will be cut off.
  • control device 30 compares the temperature in the freezing compartment 4 detected by the F sensor 19 with the set temperature TF (S59), and if the temperature of the freezing compartment 4 is higher than the set temperature TF (S59: YES), returns to In step S1, the above control action is repeated.
  • the control device 30 stops the compressor 21 and closes the three-way valve 25. As a result, the cooling work will stop. Then, the control device 30 returns to the operation of step S1.
  • the refrigerator 1 it is possible to combine the forced circulation type cooling using the first evaporator 22 and the direct cooling type cooling using the second evaporator 23, thereby reducing the number of defrosting and further reducing the amount of power consumption. Further, it is possible to prevent the temperature change from being minimized while preventing the refrigerator compartment 3 and the freezing compartment 4 from being dried, so as to prevent deterioration of the quality of foods and the like stored in the storage compartment.
  • the compressor 21 is operated to cool the refrigerating compartment 3, and here, in a state where the compressor 21 is stopped, the fan 13 can be operated to open the R buffer 11, and the first evaporator can be utilized.
  • the cooling heat of the frosting chamber 3 is achieved by the heat of melting of the frost on the 22nd. In this way, it is possible to reduce the amount of power consumption by cooling and the amount of power consumed by defrosting, and to achieve better energy saving.
  • the inside of the refrigerating compartment 3 can be humidified by the moisture of the frost, thereby preventing the food in the refrigerating compartment 3 from drying and maintaining its quality.

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Abstract

一种冰箱具有:储藏室,至少划分为冷藏室(3)与冷冻室(4);第一蒸发器(22),设置于通过供应风道(9,10)与储藏室(3,4)连接的冷却室(8);第二蒸发器(23),设置于冷冻室(4)内部;切换阀(25),用于切换制冷剂是否流向连接于第二蒸发器(23)的制冷剂通道;风机(13),用于使第一蒸发器(22)冷却的空气由冷却室(8)流向储藏室(3,4);第一风道开合器(11),插入于连接冷藏室(3)的供应风道(9)中;第二风道开合器(12),插入于连接冷冻室(4)的供应风道(9)中。该冰箱能防止储藏室(3,4)干燥,减少除霜次数和电力消耗。

Description

冰箱
本申请要求了申请日为2016年10月24日,申请号为201610937560.9,发明名称为“冰箱”的中国专利申请的优先权,其全部内容通过引用结合在本申请中。
技术领域
本发明涉及一种冰箱,其在储藏室内制冷保存食品等,特别涉及一种具有强制循环式蒸发器与直冷式蒸发器的冰箱。
背景技术
传统冰箱中,有一种冰箱是将通过蒸发器得到冷却的空气强制循环于储藏室中(例如,专利文献日本特开2011-58689号公报(第6-7页、图2))。这种冰箱中,蒸发器设置在与储藏室相隔的冷却室内部,在该蒸发器得到冷却的空气利用风机送出,通过供应风道供应至储藏室内。储藏室通常会被划分为冷藏室与冷冻室等多个收纳室,向各收纳室供应的冷气量,通过开合设在供应风道上的风门等进行控制。此外,为了融化蒸发器上的凝霜,会利用电加热器等进行加热,或者进行停机除霜、热气除霜等。
另外,有一种熟知的直冷式冰箱,其不具有将冷气强制循环的风机,直接通过与蒸发器进行热交换后的冷气的自然对流来冷却储藏室内部(例如,专利文献日本特开2009-198079号公报(第3页、图1))。这种冰箱中,用于储藏室制冷的蒸发器设置在构成储藏室壁面的绝热箱体内部及储藏室内部。
但是,从减少能量消耗,实现进一步节能,以及保持食品品质方面考虑,上述传统技术的冰箱还可以有进一步的改进。
具体而言,如专利文献日本特开2011-58689号公报中所述,传统技术的强制循环式冰箱,存在如下问题。即:蒸发器上凝霜量较大,除霜次数增多。在运行除霜融化蒸发器上凝霜时,电加热器等的使用会带来电力消耗。另外,随着除霜,储藏室内的温度上升,使制冷负荷增大,导致用于冷却储藏室的电力消耗量增大。因此,为了实现节能,需要防止蒸发器上凝霜,以减少运行除霜的次数。
此外,强制循环式冰箱中,由于蒸发器上凝霜较多,抢走了储藏室内的大量水分,存在储藏室内过度干燥的问题。储藏室内过度干燥,会导致存放在该处的食品等干燥,形成所谓冻斑,致使食品的品质恶化,所以并非优选。
此外,如专利文献日本特开2009-198079号公报中所述,传统技术的直冷式冰箱,与强制循环式冰箱相比,蒸发器上的凝霜较少,储藏室内的干燥度较低。但是,存在蒸发器除霜困难等问题。
也就是说,在蒸发器设置在储藏室周壁或者内部的直冷式冰箱中,如果为了融化凝霜,使蒸发器的温度上升,则很容易使储藏室内的温度上升。因此,除霜后的制冷负荷增大,电力消耗量也随之增大。
此外,如果冷冻室内的温度上升,导致冷冻室内的温度变化增大,则冷冻保存的食品与周围空气之间的温度差会随之增大,造成水蒸汽压差,致使水分升华,从而使食品干燥,生成所谓冻斑。此外,还存在一种问题是,较大的温度变化会使食品解冻后再冻结,导致食品内部生成较大结冰,从而造成食品细胞遭到破坏。
另外,直冷式冰箱中,除了用于加热蒸发器的除霜用电加热器等外,还需要有电加热器等,用于防止除霜水在储藏室内再冻结。这种用于防冻结的电加热器等不仅消耗电力,还增大了制冷负荷,使制冷带来的电力消耗量增大。
发明内容
为至少解决上述技术问题之一,本发明的目的在于,提供一种冰箱,其节能性优良,能够抑制储藏室干燥,减少除霜次数,减少电力消耗量。
为实现所述发明目的之一,本发明一实施方式提供了一种冰箱,具有:储藏室,其至少划分为冷藏室与冷冻室;第一蒸发器,其设置于冷却室,所述冷却室通过供应风道与所述储藏室连接;第二蒸发器,其设置于所述冷冻室内部;切换阀,用于切换制冷剂是否流向连接所述第二蒸发器的制冷剂通道;风机,用于使所述第一蒸发器中得到冷却的空气由所述冷却室流向所述储藏室;第一风道开合器,其插入设置于连接所述冷藏室的所述供应风道中;第二风道开合器,其插入设置于连接所述冷冻室的所述供应风道中。
作为本发明一实施方式的进一步改进,所述冰箱具有:第一制冷剂通道,其依次连接所述切换阀、第一调节单元、所述第一蒸发器;第二制冷剂通道,其依次连接所述切换阀、第二调节单元、所述第二蒸发器、所述第一蒸发器。所述切换阀用于将冷凝器出口侧的制冷剂通道连接至所述第一制冷剂通道或者所述第二制冷剂通道。
作为本发明一实施方式的进一步改进,所述冰箱具有负荷检测单元,用于检测所述储藏室制冷负荷,当通过所述负荷检测单元检测得到的制冷负荷小于特定值时,切换所述切换阀,使制冷剂流向所述第二蒸发器,执行冷冻室直冷运行。
作为本发明一实施方式的进一步改进,在所述冷冻室直冷运行中,停止所述风机,关闭所述第二风道开合器。
作为本发明一实施方式的进一步改进,在所述冷冻室直冷运行中,停止所述风机,关闭所述第二风道开合器起经过给定的时间,则再运行所述风机,打开所述第二风道开合器。
与现有技术相比,本发明具有以下有益技术效果:
根据本发明提供的冰箱,其具有:强制循环式第一蒸发器,其设置于冷却室;直冷式第二蒸发器,其设置于冷冻室内部;切换阀,用于切换制冷剂通道;第一风道开合器,其插入设置于连接冷藏室的供应风道中;第二风道开合器,其插入设置于连接冷冻室的供应风道中。
这样一来,通过切换切换阀,分别开合第一风道开合器与第二风道开合器,可以实现对冷藏室的强制循环式制冷及对冷冻室执行强制循环式制冷与直冷式制冷之间的切换。其结果是,能够减少除霜次数,实现节能化。
具体而言,通过切换切换阀使制冷剂流向第二蒸发器,并关闭连接冷冻室的第二风道开合器,运行压缩机,可以在不运行风机的情况下,利用第二蒸发器对冷冻室内进行制冷。
这样一来,能够减少第一蒸发器上的凝霜,防止冷冻室过度干燥,从而使运行除霜的频率相比传统技术的强制循环式冰箱有所减少。其结果,能够在减少除霜带来的电力消耗量的同时,防止冷冻室内的食品干燥。而且能够减少风机的电力消耗量。
此外,通过切换切换阀使制冷剂流向第一蒸发器,并打开连接冷冻室的第二风道开合器,运行压缩机与风机,可以利用第一蒸发器对冷冻室内进行制冷。
这样一来,能够使霜凝在第一蒸发器上,从而减少第二蒸发器上的凝霜,使第二蒸发器的除霜次数相比传统技术的直冷式冰箱有所减少。其结果,能够在减少除霜带来的电力消耗量的同时,抑制冷冻室内的温度上升,使保存在冷冻室的食品品质长期保持良好状态。
此外,通过运行风机,打开第一风道开合器,可以利用第一蒸发器上凝霜的融化热进行冷藏室制冷,同时可以利用霜的水分对冷藏室内进行加湿。这样一来,能够在实现节能高效的制冷的同时,抑制冷藏室内食品干燥,从而保持食品的品质。
此外,根据本发明提供的冰箱,冷冻循环回路上设有:第一制冷剂通道,其依次连接切换阀、第一调节单元、第一蒸发器;第二制冷剂通道,其依次连接切换阀、第二调节单元、第二蒸发器、第一蒸发器,通过切换阀可以切换冷凝器出口侧的制冷剂通道,使其连接至第一制冷剂通道或者第二制冷剂通道中的一侧。
通过将切换阀切换至第一制冷剂通道,可以使制冷剂仅流向第一蒸发器,进行储藏室制冷。也就是说,能够在防止第二蒸发器上凝霜的同时,分别将冷藏室与冷冻室冷却至合适温度。
另一方面,通过将切换阀切换至第二制冷剂通道,可以使第一蒸发器与第二蒸发器串联连接,从而在利用第二蒸发器对冷冻室内部进行直接制冷的同时,利用第一蒸发器对循环空气进行冷却,再用于除湿。其结果,能够在防止第二蒸发器上凝霜的同时,将第一蒸发器与第二蒸发器两者结合,对冷冻室进行有效制冷。
此外,利用第二制冷剂通道时,由第二蒸发器流出的制冷剂会流向第一蒸发器,所以可以在第一蒸发器中储存剩余的液态制冷剂。这样一来,能够防止液态制冷剂回流至压缩机,从而能够减小储液器等的内容积。
此外,根据本发明提供的冰箱,其中设有负荷检测单元,用于检测储藏室制冷负荷,当通过负荷检测单元检测得到的制冷负荷小于特定值时,切换切换阀,使制冷剂流向第二蒸发器,执行冷冻室直冷运行。这样一来,能够在防止冷冻室干燥的同时,利用第二蒸发器对冷冻室实现高效制冷。此外,能够使第二蒸发器上尽少凝霜。
此外,根据本发明提供的冰箱,在冷冻室直冷运行中,通过停止风机,关闭第二风道开合器,可以停止强制循环,仅利用第二蒸发器进行冷冻室制冷。这样一来,能够在防止冷冻室干燥的同时,实现更有效的制冷。
此外,根据本发明提供的冰箱,其在冷冻室直冷运行中,停止风机,关闭第二风道开合器后经过给定的时间,再运行风机,打开第二风道开合器。这样一来,在冷冻室直冷运行中,可以使空气在冷冻室与冷却室之间强制循环,从而使霜凝在第一蒸发器上。其结果,能够防止第二蒸发器上凝霜。此外,通过第一蒸发器回收的水分,能够在冷藏室的加湿运行中加以利用。
附图说明
图1是根据本发明的实施例示出的冰箱概略结构图;
图2是根据本发明的实施例示出的冰箱控制系统的框图;
图3是根据本发明的实施例示出的控制冰箱运行的控制流程图;
图4是根据本发明的实施例示出的控制冰箱运行的控制流程图;
图5是根据本发明的实施例示出的控制冰箱运行的控制流程图;
图6是根据本发明的实施例示出的控制冰箱运行的控制流程图;
图7是根据本发明的实施例示出的控制冰箱运行的控制流程图。
具体实施方式
以下,结合附图,对根据本发明的实施例示出的冰箱进行详细说明。
图1是根据本实施例示出的冰箱1的概略结构图。图1中,冰箱1的侧剖面略图与冷冻循环回路20的略图重叠。如图1所示,冰箱1以绝热箱体2作为主体,该绝热箱体2的内部设有用于储藏食品等的储藏室。
储藏室内部划分为:保存温度各异的两个收纳室,也就是说,冷藏温度域的冷藏室3与冷冻温度域的冷冻室4。冷藏室3与位于其下层的冷冻室4之间隔有绝热分隔壁7。冷藏室3与冷冻室4的内部设有搁板(附图未标示)及收纳容器(附图未标示)等,用于存放食品等。
作为冰箱1的主体,绝热箱体2的结构包括:外箱2a,由钢板制成,前方设有开口;内箱2b,由合成树脂制成,设置于上述外箱2a内,与其留有空隙;绝热材料2c,由聚氨酯泡沫制成,发泡填充于上述外箱2a与内箱2b之间的空隙内。
绝热箱体2的前方设有开口,上述开口分别与冷藏室3及冷冻室4对应,其上分别设有可以自由开合的绝热门5、6。另外,门5、6的箱内侧可以设置收纳筐。此外,冰箱1设有门开合传感器34,用于检测门5、6的开合。
另外,储藏室可以做更细的划分,例如,设置制冰室及果蔬室等其他收纳室,并设置多个门分别对应于各收纳室。此外,还可以在各收纳室设置能够与各个门成一体拉出的收纳容器等。
冷藏室3的背面与顶面形成供应风道10,用于将下文所述被第一蒸发器22冷却的空气导入冷藏室3内部。供应风道10指的是夹在构成冷藏室3背面、由合成树脂制成的分隔体与绝热箱体2的内箱2b之间形成的空间。上述分隔体上设有出风口,用于将流入供应风道10内的冷气供应至冷藏室3的内部。
冷冻室4的背面设有供应风道9,其与冷冻室4和供应风道10相连。供应风道9与冷冻室4之间,隔有合成树脂制成的分隔体。此外,上述分隔体上设有出风口,冷气由这里流向冷冻室4,该出风口上设有作为第二风道开合器的冷冻风门12(以下称“F风门12”)。
此外,连接冷藏室3的供应风道10上设有作为第一风道开合器的冷藏风门11(以下称“R风门11”)。也就是说,供应风道9与供应风道10隔着R风门11相连。
R风门11与F风门12是一种电动风门,其由一种板状体和驱动电机构成,前者为一侧可自由旋转的轴支撑开合盖。还有,第一风道开合器或者第二风道开合器并不限于这些,也可以采用例如,滑动式开合板等其他形式的开合装置。
通过开合R风门11,可以调节空气由供应风道9流向供应风道10与否。此外,通过适当的调节R风门11的开合动作,可以调节向冷藏室3供应的冷气流量。
此外,通过开合F风门12,可以调节空气由供应风道9流向冷冻室4与否。通过适当的调节F风门12的开合动作,可以调节向冷冻室4供应的冷气流量。
供应风道9的深度侧,绝热箱2的内部设有冷却室8,其与供应风道9之间隔有合成树脂制成的分隔体。冷却室8的内部设有第一蒸发器22,用于冷却循环在室内的空气。关于第一蒸发器22的详细说明见后文。
此外,冷却室8的内部,第一蒸发器22的下方设有附图未标示的除霜加热器,其作为一种除霜单元,用于融化和清除第一蒸发器22上的凝霜。此外,冷却室8的下方设有回流口,用于使空气由冷冻室4回流至冷却室8。
冷却室8的上方设有一开口连接供应风道9作为送风口,该送风口上装有风机13,用于循环冷气。也就是说,风机13的作用是,使第一蒸发器22中得到冷却的空气由冷却室8流向储藏室。风机13是一种轴流风机,其具有:可旋转螺旋桨式风扇;风扇电机(附图未标示);具有风洞的套管(附图未标示)。另外,风机13还可以采用例如不具有套管的螺旋桨式风机与电机的组合以及多叶片式风扇等其他形式的风机。
冷藏室3的内部设有冷藏室温度传感器18(以下称“R传感器18”),用于检测冷藏室3内部的温度。冷冻室4的内部设有冷冻室温度传感器19,用于检测冷冻室4内部的温度(以下称“F传感器19”)。另外,R传感器18与F传感器19的安装位置不限于图1所示位置。此外,冰箱1还设有箱外温度传感器33,用于检测冰箱外部的温度。
作为制冷单元,冰箱1具有蒸汽压缩式冷冻循环回路20。冷冻循环回路20包括:压缩机21,用于压缩制冷剂;冷凝器24,压缩成高温高压的制冷剂在这里与箱外空气进行热交换,以使制冷剂凝结。用于向压缩机21与冷凝器24局部送风以及向冷凝器24送风的散热风扇(附图未标示)等设置在位于冰箱1下方深度侧的机械室中。另外,冰箱1的冷冻循环回路20中使用的制冷剂为异丁烷 (R600a)。
此外,冷冻循环回路20包括:第一蒸发器22,其设置于冷却室8内部,用于进行强制循环式制冷;第二蒸发器23,其设置于冷冻室4内部,用于进行直冷式制冷。
第一蒸发器22是:例如,以换热管内部为制冷剂流路的翅片管式热交换器。流经第一蒸发器22的制冷剂与流经冷却室8的空气进行热交换后蒸发。这样一来,流经冷却室8的空气会被冷却,得到冷却的该空气被供应至冷藏室3及冷冻室4。另外,第一蒸发器22可以采用其他形式的热交换器,例如,采用扁平多孔管及异形管的热交换器等。
第二蒸发器23可以采用例如,以换热管内部为制冷剂流路,换热管外部设有促进传热的金属丝以及翅片管等的各种热交换器。此外,第二蒸发器23也可以是,将一对钢板贴合在一起,在该钢板之间形成制冷剂流路的所谓压焊板式热交换器。流经第二蒸发器23的制冷剂与冷冻室4内的空气进行热交换后蒸发。这样一来,冷冻室4会得到冷却。
第一蒸发器22与第二蒸发器23上分别连接有第一调节单元26与第二调节单元27,用于使高压的液态制冷剂压缩膨胀。第一调节单元26与第二调节单元27的上游侧设有三通阀25,其作为切换阀,用于切换制冷剂通道,选择是否使制冷剂流入连接第二蒸发器23的制冷剂通道(第二制冷剂通道B)。
也就是说,冷冻循环回路20包括:第一制冷剂通道A,其依次连接三通阀25、第一调节单元26、第一蒸发器22;第二制冷剂通道B,其依次连接三通阀25、第二调节单元27、第二蒸发器23、第一蒸发器22。此外,通过切换三通阀25,可以将冷凝器24出口侧的制冷剂通道连接至第一制冷剂通道A或者第二制冷剂通道B的某一侧。另外,三通阀25也可以将第一制冷剂通道A与第二制冷剂通道B双双关闭。
这里,第一调节单元26与第二调节单元27可以采用例如,毛细管及电子膨胀阀等。当采用能够分别将第一调节单元26与第二调节单元27完全关闭的电子膨胀阀时,也可以在第一调节单元26与第二调节单元27中选择一个,将其置于敞开状态,从而省略三通阀25。也就是说,可以将作为第一调节单元26与第二调节单元27的电子膨胀阀,作为切换制冷剂通道的切换阀加以利用。此外,也可以在第一制冷剂通道A与第二制冷剂通道B上分别设置电磁开合阀等,作为代替三通阀25的切换阀。
图2是描述冰箱1控制系统的框图。如图2所示,冰箱1设有控制装置30,用于控制各组成设备。控制装置30作为一种控制单元,包含一种微型处理器,用于执行特定的运算,并具有计时器31,用于执行时间运算。
控制装置30的输入侧连接有:F传感器19,用于检测冷冻室4(参考图1)温度;R传感器18,用于检测冷藏室3(参考图1)温度;操作面板32,用于用户输入各种设定值;箱外温度传感器33及门开合传感器34。
F传感器19、R传感器18、箱外温度传感器33及门开合传感器34是控制装置30的一种负荷检测单元,用于检测运算制冷负荷所需的信息。此外,作为其他负荷检测单元,控制装置30还具有检测压缩机21负荷(电流、电压)的功能。
控制装置30的输出侧连接有:F风门12、R风门11、压缩机21、风机13及三通阀25。另外,控制装置30上还连接有其他附图未标示的传感器类及受控设备。
控制装置30根据F传感器19、R传感器18、操作面板32、箱外温度传感器33及门开合传感器34等的输入,执行指定运算,从而控制F风门12、R风门11、压缩机21、风机13及三通阀25等。
下面,参考图3至图7,对图1及图2所示冰箱1的控制动作进行详细说明。图3是控制冰箱1工作的流程图,示出了有关运行模式选择的控制流程。
如图3所示,控制装置30(参考图2)在常用高负荷模式M1、节能模式M2及混合制冷模式 M3中选择任意一种模式。具体而言,首先,控制装置30判断是否满足常用高负荷模式M1的必要条件(S1),如果满足必要条件(S1:是),则执行常用高负荷模式M1。如果不满足常用高负荷模式M1的必要条件(S1:否),则控制装置30进行是否执行节能模式M2的判断(S2),如果满足节能模式M2的必要条件(S2:是),则执行节能模式M2。另一方面,如果不满足节能模式M2的必要条件(S2:否),则控制装置30进行混合制冷模式M3的判别(S3)。如果满足必要条件(S3:是),则控制装置30选择混合制冷模式M3,如果不满足必要条件(S3:否),则返回步骤S1,继续选择运行模式。
这里,采用例如,冰箱1的制冷负荷作为选择运行模式的标准。也就是说,如果制冷负荷大于或等于指定标准值(第一标准值)(S1:是),则控制装置30执行常用高负荷模式M1。此外,如果制冷负荷比第一标准值还小,但大于或等于比第一标准值还小的指定标准值(第二标准值)(S2:是),则控制装置30选择节能模式M2。另一方面,如果制冷负荷比第二标准值还小(S3:是),则控制装置30选择混合制冷模式M3。
选择运行模式时作为参考的制冷负荷值根据:由图1或者图2所示R传感器18检测得到的冷藏室3的温度;由F传感器19检测得到的冷冻室4温度;由该箱外温度传感器33检测得到的箱外温度;由门开合传感器34检测得到的门5、6的开合状态;压缩机21的负荷;通过操作面板32输入的各种设定值等,执行特定运算得出。此外,也可以利用控制装置30的计时器31及学习功能等,存储制冷负荷的变化状态,执行预测制冷负荷的运算。
下面,对常用高负荷模式M1下的控制动作进行详细说明。图4是控制冰箱1工作的流程图,示出了有关常用高负荷模式M1的控制流程。
在常用高负荷模式M1下,在图1所示第一蒸发器22中得到冷却的空气被强制循环,用以冷却冷藏室3与冷冻室4。制冷时,F风门12始终打开,R风门11根据冷藏室3的温度进行开合控制。
具体而言,如图4所示,首先,控制装置30(参考图2)通过比较由F传感器19检测得到的冷冻室4内温度与指定的设定温度TF,判断是否执行制冷运行(S10)。
这里,设定温度TF是决定开始或者结束冷冻室4制冷的标准温度。详细来说,设定温度TF项可以输入指定的设定值F开作为开始冷冻室4制冷的标准,或者输入指定的设定值F关作为结束冷冻室4制冷的标准。设定值F开与设定值F关是根据制冷负荷状态及通过操作面板32(参考图2)输入的各种设定值等确定的标准温度,设定值F开的值大于设定值F关。对设定温度TF项,采用设定值F开与设定值F关,可以避免开始制冷与停止制冷间的频繁切换,实现稳定控制。
步骤S10中,如果冷冻室4的温度高于设定温度TF(S10:是),则控制装置30在设定温度TF项输入设定值F关,运行压缩机21与风机13,将三通阀25切换至第一制冷剂通道A,打开F风门12(S11)。
这样一来,被压缩机21压缩成高温高压的制冷剂在冷凝器24(参考图1)中放热凝结,然后经第一调节单元26(参考图1)减压后压缩膨胀,流入第一蒸发器22。在第一蒸发器22中,低温的液态制冷剂蒸发,冷却室8内的空气通过与该制冷剂的热交换得到冷却。此后,得到冷却的该空气被风机13送出,供应至冷冻室4。另外,在步骤S11中,通过在设定温度TF项输入设定值F关,可以避免运行压缩机21与风机13后制冷工作马上结束。
其次,控制装置30通过比较由R传感器18检测得到的冷藏室3内的温度与指定的设定温度TR,判断是否要对冷藏室3进行制冷(S12)。
这里,设定温度TR是决定开始或者结束冷藏室3制冷的标准温度。详细来说,设定温度TR项可以输入指定的设定值R开作为开始冷藏室3制冷的标准或者输入指定的设定值R关作为结束冷藏室3制冷的标准。设定值R开与设定值R关是根据制冷负荷的状态及通过操作面板32输入的各种设定值等决定的标准温度,设定值R开大于设定值R关。在设定温度TR项,采用设定值R开与设定值R关,是为了在开始制冷的标准与结束制冷的标准之间设定一定值差,以避免频繁的重复运行 停止动作。
在步骤S12中,如果冷藏室3的温度高于设定温度TR(S12:是),则控制装置30打开R风门11,在设定温度TR项输入设定值R关(S13)。打开R风门11后,在第一蒸发器22中得到冷却的空气流入冷藏室3,对冷藏室3进行制冷。另外,在设定温度TR项输入设定值R关,可以避免R风门11打开后对冷藏室3的制冷马上结束,从而避免R风门11频繁重复开合动作。
另一方面,在步骤S12中,如果冷藏室3的温度低于或等于设定温度TR(S12:否),则控制装置30关闭R风门11,在设定温度TR项输入设定值R开(S15)。这样一来,会切断对冷藏室内的冷气供应。此外,设定温度TR会被设定为开始对冷藏室3进行制冷的标准温度即设定值R开。
此外,在步骤S10中,如果冷冻室4的温度低于或等于设定温度TF(S10:否),则控制装置30在设定温度TF项输入设定值F开,停止压缩机21与风机13,关闭三通阀25,关闭F风门12(S14)。这样一来,制冷工作将停止。
下面,对节能模式M2下的控制动作进行详细说明。图5是控制冰箱1工作的流程图,示出了有关节能模式M2的控制流程。
在节能模式M2下,在图1所示第一蒸发器22中得到冷却的空气被强制循环,用以冷却冷藏室3与冷冻室4,R风门11与F风门12分别根据冷藏室3与冷冻室4的温度进行开合控制。
具体而言,如图5所示,首先,控制装置30(参考图2)运行压缩机21与风机13,将三通阀25切换至第一制冷剂通道A(S20)。这样一来,将利用第一蒸发器22进行强制循环式制冷。
然后,控制装置30通过比较由F传感器19检测得到的冷冻室4内温度与设定温度TF,判断是否要对冷冻室4进行制冷(S21)。如果冷冻室4的温度高于设定温度TF(S21:是),则控制装置30打开F风门12,在设定温度TF项输入设定值F关。这样一来,在第一蒸发器22中得到冷却的空气将供应至冷冻室4。
另一方面,在步骤S21中,如果冷冻室4温度低于或等于设定温度TF(S21:否),则控制装置30关闭F风门12,在设定温度TF项输入设定值F开(S25)。关闭F风门12后,冷冻室4的制冷将停止。
此外,当冷冻室4的温度高于设定温度TF(S21:是),且正在进行冷冻室4制冷时(S22),控制装置30会测定F风门12维持打开状态的累计时间(S23)。然后,控制装置30会判断F风门12维持打开状态的累计时间是否超过了F风门12维持打开状态的指定上限值即F最长制冷时间(以下称“时间Fmax”)(S24)。
当F风门12维持打开状态的累计时间超过时间Fmax时(S24:是),控制装置30将关闭F风门12,在设定温度TF项输入设定值F开(S25)。F风门12关闭后,将停止对冷冻室4供应冷气。也就是说,F风门12维持打开状态的累计时间一旦超过时间Fmax,控制装置30会不顾及冷冻室4的温度,直接停止冷冻室4制冷,切换至下一个制冷动作。
另一方面,当F风门12维持打开状态的累计时间不超过时间Fmax时(S24:否),控制装置30将返回步骤S1(参考图3),重复上述控制动作。也就是说,如果制冷负荷相等(图3、S2:是),冷冻室4的温度高于设定温度TF(S21:是),则利用强制循环继续对冷冻室4进行制冷。
其次,停止冷冻室4制冷后(S25),控制装置30会通过比较由R传感器18检测得到的冷藏室3内的温度与设定温度TR,判断是否要对冷藏室3进行制冷(S26)。如果冷藏室3的温度高于设定温度TR(S26:是),则控制装置30打开R风门11,在设定温度TR项输入设定值R关(S27)。R风门11打开后,在第一蒸发器22中得到冷却的空气将流入冷藏室3,对冷藏室3进行制冷。
然后,控制装置30会测定R风门11维持打开状态的累计时间(S28),进而判断该累计时间是否超过了R风门11维持打开状态的指定上限值即R最长制冷时间(以下称“时间Rmax”)(S29)。
当R风门11维持打开状态的累计时间超过时间Rmax时(S29:是),控制装置30会关闭R风门11(S30),将R风门11维持打开状态的累计时间及F风门12维持打开状态的累计时间重置后(S31), 返回至步骤S22,打开F风门12。
也就是说,R风门11维持打开状态的累计时间一旦超过时间Rmax,控制装置30会不顾及冷藏室3的温度,直接停止冷藏室3制冷,切换至冷冻室4制冷。这样一来,会通过切换,使在第一蒸发器22中得到冷却的空气根据指定的时间(时间Fmax、时间Rmax)交替供应至冷藏室3与冷冻室4。
另一方面,在步骤S29中,当R风门11维持打开状态的累计时间不超过时间Rmax时(S29:否),控制装置30将返回至步骤S1,重复上述控制动作,利用强制循环继续对冷藏室3进行制冷。
此外,在步骤S26中,如果冷藏室3的温度低于或等于设定温度TR(S26:否),则控制装置30关闭R风门11,在设定温度TR项输入设定值R开(S32)。这样一来,将切断对冷藏室3的冷气供应。
然后,控制装置30会比较由F传感器19检测得到的冷冻室4内的温度与设定温度TF(S33),如果冷冻室4的温度高于设定温度TF(S33:是),则返回至步骤S1,重复上述控制动作。
另一方面,如果冷冻室4的温度低于或等于设定温度TF(S33:否),则控制装置30停止压缩机21与风机13,关闭三通阀25。这样一来,制冷工作将停止。然后,控制装置30返回至步骤S1的动作。
下面,对混合制冷模式M3下的控制动作进行详细说明。图6及图7是控制冰箱1工作的流程图,示出了有关混合制冷模式M3的控制流程。
在混合制冷模式M3下,进行利用图1所示第一蒸发器22的强制循环式制冷与利用第二蒸发器23的直冷式制冷(冷冻室直冷运行)。也就是说,利用第一蒸发器22冷却冷藏室3与冷冻室4,利用第二蒸发器23冷却冷冻室4。
具体而言,如图6所示,首先,控制装置30(参考图2)运行压缩机21(S40),比较由F传感器19检测得到的冷冻室4内的温度与设定温度TF,判断是否要对冷冻室4进行制冷(S41)。
如果冷冻室4的温度高于设定温度TF(S41:是),则控制装置30将三通阀25切换至第二制冷剂通道B,在设定温度TF项输入设定值F关(S42)。将三通阀25切换至第二制冷剂通道B,由冷凝器24(参考图1)出来的制冷剂经第二调节单元27(参考图1)减压后,流入第二蒸发器23。这样一来,将利用第二蒸发器23对冷冻室4进行制冷。
另外,在使用第二制冷剂通道B时,由第二蒸发器23出来的制冷剂会流入第一蒸发器22,所以可以在第一蒸发器22中存储剩余的液态制冷剂。这样一来,能够防止液态制冷剂回流至压缩机21。
接着,控制装置30会测定切换F风门12后所经历的时间(S43),进而判断切换F风门12后所经历的时间是否超过了指定的标准值即切换F风门的时间间隔(以下称“时间t”)(S44)。
如果切换F风门12后所经历的时间达到了标准时间t(S44:是),则由控制装置30判断F风门12的开合状态(S45),如果F风门12处于关闭状态(S45:是),则将切换F风门12后所经历的时间重置后,以低转速运行风机13,打开F风门12(S46)。
这样一来,可以使冷冻室4的空气循环至冷却室8(参考图1),从而利用第一蒸发器22实现制冷。其结果,能够使霜凝在第一蒸发器22上,从而减少第二蒸发器23上的凝霜。此外,被第一蒸发器22回收的水分可以利用于冷藏室3的加湿运行。
另一方面,在步骤S45中,当F风门12处于打开状态时(S45:否),控制装置30会将切换F风门12后所经历的时间重置,停止风机13,关闭F风门12(S49)。这样一来,将停止利用第一蒸发器22进行冷冻室4制冷,冷冻室4仅靠第二蒸发器23的直冷式制冷实现冷却。这样一来,能够在防止第一蒸发器22上过度凝霜及冷冻室4干燥的同时,实现有效制冷。
此外,在步骤S44中,如果切换F风门12后所经历的时间未达到标准时间t(S44:否),则控制装置30会维持F风门12的开合状态及风机13的运行状态。
这样一来,在利用第二蒸发器23的冷冻室直冷运行中,可以根据指定的时间t,重复F风门12的开合及风机13的运行/停止动作,从而防止冷冻室4干燥,减少第一蒸发器22及第二蒸发器23上凝霜,实现节能。
其次,控制装置30进入步骤S47,测定F风门12维持打开状态的累计时间,进而测定该累计时间是否超过时间Fmax(S48)。当F风门12维持打开状态的累计时间未达到时间Fmax时(S48:否),控制装置30返回至步骤S1(参考图3),重复上述控制动作。也就是说,如果制冷负荷相等(图3、S3:是),冷冻室4的温度高于设定温度TF(S41:是),则继续进行利用第二蒸发器23的冷冻室直冷运行。
另一方面,在步骤S48中,F风门12维持打开状态的累计时间超过时间Fmax(S48:是)时,或者步骤S41中,冷冻室4的温度低于或等于设定温度TF(S41:否)时,控制装置30会如图7所示,关闭F风门12,将三通阀25切换至第一制冷剂通道A。这样一来,将停止对冷冻室4供应冷气,同时停止利用第二蒸发器23的冷冻室直冷运行。
接着,控制装置30在设定温度TF项输入设定值F开(S51),比较由R传感器18检测得到的冷藏室3内的温度与设定温度TR,判断是否要对冷藏室3进行制冷(S52)。
如果冷藏室3的温度高于设定温度TR(S52:是),则控制装置30打开R风门11,运行风机13,在设定温度TR项输入设定值R关(S53)。这样一来,在第一蒸发器22中得到冷却的空气将流入冷藏室3,对冷藏室3进行制冷。
然后,控制装置30测定R风门11维持打开状态的累计时间(S54),进而判断该累计时间是否超过了时间Rmax(S55)。当R风门11维持打开状态的累计时间超过时间Rmax时(S55:是),控制装置30关闭R风门11(S56),将R风门11维持打开状态的累计时间、F风门12维持打开状态的累计时间及切换F风门12后所经历的时间重置后(S57),如图6所示,返回至步骤42,将三通阀25切换至第二制冷剂通道B。
这样一来,会根据指定的时间(时间Fmax、时间Rmax)执行切换,交替进行利用第一蒸发器22的冷藏室3强制循环式制冷与利用第二蒸发器23的冷冻室4直冷式制冷。
另一方面,如图7所示,在步骤S55中,R风门11维持打开状态的累计时间不超过时间Rmax时(S55:否),控制装置30将返回至步骤S1(参考图3),重复上述控制动作,继续利用强制循环对冷藏室3进行制冷。
此外,在步骤S52中,如果冷藏室3的温度低于或等于设定温度TR(S52:否),则控制装置30关闭R风门11,停止风机13,在设定温度TR项输入设定值R开(S58)。这样一来,将切断对冷藏室3的冷气供应。
然后,控制装置30会比较由F传感器19检测得到的冷冻室4内的温度与设定温度TF(S59),如果冷冻室4的温度高于设定温度TF(S59:是),则返回至步骤S1,重复上述控制动作。
另一方面,如果冷冻室4的温度低于或等于设定温度TF(S59:否),则控制装置30停止压缩机21,关闭三通阀25。这样一来,制冷工作将停止。然后,控制装置30返回至步骤S1的动作。
如上所述,采用冰箱1,可以结合利用第一蒸发器22的强制循环式制冷与利用第二蒸发器23的直冷式制冷,减少除霜次数,进而减少电力消耗量。此外,能够在防止冷藏室3与冷冻室4干燥的同时,将温度变化降到最低,以防止存放在储藏室的食品等品质劣化。
另外,上述例子中,给出了运行压缩机21对冷藏室3进行制冷的例子,这里,还可以在停止压缩机21的状态下,运行风机13,打开R缓冲器11,利用第一蒸发器22上凝霜的融化热,实现冷藏室3的制冷。这样一来,能够减少制冷带来的电力消耗量与除霜带来的电力消耗量,实现更好的节能。此外,利用霜的水分可以对冷藏室3内进行加湿,从而防止冷藏室3内的食品干燥,保持其品质。
本发明并不限于上述实施例,可以在不脱离本发明主旨的范围内进行其他各种适当变更。

Claims (5)

  1. 一种冰箱,其特征在于,具有:
    储藏室,其至少划分为冷藏室与冷冻室;
    第一蒸发器,其设置于冷却室,所述冷却室通过供应风道与所述储藏室连接;
    第二蒸发器,其设置于所述冷冻室内部;
    切换阀,用于切换制冷剂是否流向连接所述第二蒸发器的制冷剂通道;
    风机,用于使所述第一蒸发器中得到冷却的空气由所述冷却室流向所述储藏室;
    第一风道开合器,其插入设置于连接所述冷藏室的所述供应风道中;以及
    第二风道开合器,其插入设置于连接所述冷冻室的所述供应风道中。
  2. 根据权利要求1所述的冰箱,其特征在于,具有:
    第一制冷剂通道,其依次连接所述切换阀、第一调节单元、所述第一蒸发器;以及
    第二制冷剂通道,其依次连接所述切换阀、第二调节单元、所述第二蒸发器、所述第一蒸发器,
    其中,所述切换阀用于将冷凝器出口侧的制冷剂通道连接至所述第一制冷剂通道或者所述第二制冷剂通道。
  3. 根据权利要求1或者2所述的冰箱,其特征在于,具有负荷检测单元,用于检测所述储藏室的制冷负荷,当通过所述负荷检测单元检测得到的制冷负荷小于特定值时,切换所述切换阀,使制冷剂流向所述第二蒸发器,执行冷冻室直冷运行。
  4. 根据权利要求3所述的冰箱,其特征在于,在所述冷冻室直冷运行中,停止所述风机,关闭所述第二风道开合器。
  5. 根据权利要求4所述的冰箱,其特征在于,在所述冷冻室直冷运行中,停止所述风机,关闭所述第二风道开合器起经过给定的时间,则运行所述风机,打开所述第二风道开合器。
PCT/CN2017/074590 2016-10-24 2017-02-23 冰箱 Ceased WO2018076584A1 (zh)

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