WO2020119516A1 - Réfrigérateur - Google Patents

Réfrigérateur Download PDF

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Publication number
WO2020119516A1
WO2020119516A1 PCT/CN2019/122645 CN2019122645W WO2020119516A1 WO 2020119516 A1 WO2020119516 A1 WO 2020119516A1 CN 2019122645 W CN2019122645 W CN 2019122645W WO 2020119516 A1 WO2020119516 A1 WO 2020119516A1
Authority
WO
WIPO (PCT)
Prior art keywords
refrigerator
control device
compartment
fan
fan cover
Prior art date
Application number
PCT/CN2019/122645
Other languages
English (en)
Chinese (zh)
Inventor
舘野恭也
豊嶋昌志
小松肇
Original Assignee
青岛海尔电冰箱有限公司
海尔智家股份有限公司
Aqua株式会社
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 青岛海尔电冰箱有限公司, 海尔智家股份有限公司, Aqua株式会社 filed Critical 青岛海尔电冰箱有限公司
Priority to CN201980028195.1A priority Critical patent/CN112243481B/zh
Priority to EP19895186.5A priority patent/EP3896368B1/fr
Publication of WO2020119516A1 publication Critical patent/WO2020119516A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • 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
    • F25D17/062—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 in household refrigerators
    • F25D17/065—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 in household refrigerators with compartments at different temperatures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • 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
    • F25D17/042—Air treating means within refrigerated spaces
    • F25D17/045—Air flow control arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00—Control issues
    • F25B2600/02—Compressor control
    • F25B2600/025—Compressor control by controlling speed
    • F25B2600/0251—Compressor control by controlling speed with on-off operation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00—Control issues
    • F25B2600/11—Fan speed control
    • F25B2600/112—Fan speed control of evaporator fans
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2317/00—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass
    • F25D2317/06—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass with forced air circulation
    • F25D2317/068—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass with forced air circulation characterised by the fans
    • F25D2317/0681—Details thereof

Definitions

  • the present invention relates to a refrigerator that cools and stores foods and the like in a storage room, and in particular to a refrigerator that uses a shielding device to properly block an air path connected to the storage room.
  • Patent Document 1 a refrigerator that appropriately cools a plurality of storage compartments with one cooler is known.
  • Patent Literature 1 JP Patent Publication No. 2013-2664
  • FIG. 11 schematically shows the refrigerator 100 described in this document.
  • a refrigerator compartment 101 a freezer compartment 102, and a vegetable compartment 103 are formed from above.
  • a cooling compartment 104 accommodating the cooler 108 is formed, and on the partition wall 105 partitioning the cooling compartment 104 from the freezing compartment 102, an opening 106 for supplying cold air to each storage compartment is formed.
  • the opening 106 is provided with a blower fan 107 that sends out cool air, and a fan cover 110 that covers the blower fan 107 is located in the freezing compartment 102.
  • a damper 114 is provided in the middle of the air passage 109 through which cold air supplied to the refrigerator compartment 101 flows.
  • the fan cover 110 described above will be described in detail with reference to FIG. 12.
  • the fan cover 110 is formed with a recess 111 having a substantially quadrangular shape, and an opening 113 obtained by partially cutting away the upper portion of the recess 111.
  • the opening 113 of the fan cover 110 communicates with the air passage 109 on the side of the refrigerator body.
  • the refrigerator 100 configured as described above operates as follows. Referring to FIG. 11, first, when cooling both the refrigerator compartment 101 and the freezer compartment 102, the fan cover 110 is separated from the blower fan 107, the damper 114 is opened, and the blower fan 107 is rotated in this state. In this way, a part of the cold air cooled by the cooler 108 inside the cooling chamber 104 is sent to the freezing chamber 102 based on the blowing force of the blowing fan 107. In addition, the other part of the cold air is sent to the refrigerator compartment 101 via the air path 109, the air door 114, and the air path 109. Thereby, both the freezing compartment 102 and the refrigerating compartment 101 are cooled.
  • the blower fan 107 when cooling only the refrigerator compartment 101, the blower fan 107 is covered with the fan cover 110, the damper 114 is opened, and the cool air cooled by the cooler 108 is sent by the blower fan 107 in this state.
  • the fan cover 110 When the fan cover 110 is closed, the opening 113 formed in the upper part of the fan cover 110 communicates with the air passage 109.
  • the cold air sent by the blower fan 107 is supplied to the refrigerator compartment 101 through the opening 113, the damper 114, and the air passage 109.
  • the fan cover 110 in which the opening 113 is formed it is possible to appropriately cool a plurality of storage rooms with one cooler 108.
  • the refrigerator 100 described above when the high-temperature and high-humidity storage object such as a hot pot is stored in the refrigerator compartment 101, the moisture emitted from the storage object reaches the cooling chamber 104 via a return air path (not shown).
  • the fan cover 110 and the drive mechanism thereof are arranged in the closest vicinity of the cooling chamber 104. Therefore, if this moisture adheres to the drive mechanism that drives the fan cover 110 and freezes, the fan cover 110 cannot be opened and closed, and the opening and closing control of the air path of the fan cover 110 cannot be performed.
  • a heater is placed near the fan cover 110 for heating to prevent freezing of the fan cover 110, the structure of the refrigerator 100 becomes complicated and the manufacturing cost increases. Furthermore, since the heater consumes power, there is also a problem that the operating cost of the refrigerator 100 increases.
  • An object of the present invention is to provide a refrigerator capable of preventing freezing of a mechanism for driving a fan cover through simple control.
  • the present invention provides a refrigerator including: a cooler of a freezing loop that cools air supplied to a storage compartment via an air supply duct; the cooler is provided and formed with A cooling chamber of an air supply port connected to the storage room; a fan that blows the air supplied from the air supply port to the storage room; a shielding device at least partially blocking the air supply port; and controlling the freezing A control device for the operation of the loop, the fan, and the shielding device, the shielding device having: a fan cover that covers the fan from outside the cooling chamber; a drive shaft that drives the opening and closing of the fan cover; A screw mechanism formed between the drive shaft and the fan cover; and a motor that rotates the drive shaft, when the environment in the box of the storage room is given, the control device causes the The motor decelerates.
  • the refrigerator of the present invention when the storage compartment becomes a predetermined environment, by decelerating the motor that rotates the drive shaft, the torque of the motor can be increased, and the screw mechanism can be prevented from becoming stiff due to freezing.
  • the control device decelerates the motor according to the environment in the box of the storage compartment.
  • the motor is decelerated according to the environment of the storage compartment of the storage room only when the user opens and closes the door to put the storage items in the storage room, it is possible to prevent the failure of the refrigerator from being mistakenly detected as Changes in the environment inside the box.
  • the refrigerator further includes: a temperature sensor that measures the temperature of the storage compartment; and a timer that measures how long the freezing loop cools the storage compartment, measured in the temperature sensor
  • the control device changes the The motor decelerates.
  • the control device determines that the high temperature that has increased the temperature of the storage compartment is stored By reducing the speed of the motor to increase the torque, the drive shaft can be prevented from freezing.
  • control device decelerates the motor within two cycles after the completion of the defrosting process.
  • the refrigerator of the present invention although the operation sound is increased by decelerating the motor, by limiting the time for decelerating the motor, the time for generating noise can be shortened.
  • Fig. 1 is a front view of the refrigerator of the present invention.
  • FIG. 2 is a schematic cross-sectional view of the refrigerator of the present invention.
  • FIG. 3 is a schematic diagram of the air path of the refrigerator of the present invention.
  • FIG. 4 is a side cross-sectional view of the vicinity of the cooling chamber in a state where the fan cover of the refrigerator of the present invention is opened.
  • FIG. 5 is a side cross-sectional view of the vicinity of the cooling chamber in a state where the fan cover of the refrigerator of the present invention is closed.
  • FIG. 6 is an exploded perspective view of the shielding device of the refrigerator of the present invention.
  • FIG. 7 is a block diagram of the connection structure of the refrigerator of the present invention.
  • FIG. 8 is a flowchart of the operation method of the refrigerator of the present invention.
  • FIG. 10(A) to 10(C) are operation schematic diagrams of the refrigerator of the present invention, wherein FIG. 10(A) is a flowchart of step S20,
  • FIG. 10(B) is a diagram showing the situation from the start of the compressor to the next start in the abnormality detection period
  • FIG. 10(C) is a picture from the stop of the compressor to the next stop Diagram of the situation during anomaly detection.
  • FIG. 11 is a side cross-sectional view of a conventional refrigerator in the background art.
  • FIG. 12 is a perspective view of a fan cover used in a conventional refrigerator in the background art.
  • the refrigerator 10 according to the embodiment of the present invention will be described in detail based on the drawings.
  • the same members are given the same reference numerals in principle, and redundant explanations are omitted.
  • the directions of up, down, left, and right are used as appropriate, but left and right indicate left and right when the refrigerator 10 is viewed from the front.
  • FIG. 1 is a schematic front view showing a refrigerator 10 according to an embodiment of the present invention.
  • the refrigerator 10 according to the present embodiment includes a heat insulation box 12 as a main body, and a storage room for storing food and the like is formed inside the heat insulation box 12.
  • the uppermost layer is the refrigerating compartment 13
  • the lower left layer is the ice making compartment 14
  • the right side is the upper freezing compartment 15
  • the lowermost layer is the lower freezing compartment 16
  • the lowermost layer is the vegetable compartment 17.
  • the ice making compartment 14, the upper freezing compartment 15, and the lower freezing compartment 16 are all storage compartments in the freezing temperature range. In the following description, they may be collectively referred to as the freezer compartment 141 as appropriate.
  • the front opening of the heat insulation box 12 is provided with heat insulation doors 18 to 22 in an opening corresponding to each storage room so as to be openable and closable.
  • the heat insulation door 181 and the heat insulation door 182 divide and seal the front surface of the refrigerator compartment 13 and are rotatably supported by the heat insulation box 12.
  • the heat insulation door 19 to the heat insulation door 22 are integrally combined with the storage container, and are supported by the heat insulation box 12 so as to be able to be pulled out in front of the refrigerator 10.
  • the heat insulation door 19 closes the ice making compartment 14
  • the heat insulation door 20 closes the upper freezing room
  • the heat insulation door 21 closes the lower freezing room 16
  • the heat insulation door 22 closes the vegetable room 17.
  • the heat-insulating box 12 as the main body of the refrigerator 10 includes an outer box 121 made of a steel plate with a front opening, and an inner box made of synthetic resin that is arranged with a gap in the outer box 121 and has a front opening 122.
  • each of the above heat-insulating doors 18 and the like also have the same heat-insulating structure as the heat-insulating box 12.
  • the refrigerator compartment 13 and the freezer compartment 141 located at the lower layer thereof are partitioned by an insulating partition wall 38.
  • the ice making compartment 14 inside the freezing compartment 141 and the upper freezing compartment 15 are partitioned by a partition wall (not shown).
  • the cold air flow is freely communicated between the ice-making compartment 14 and the upper-layer freezing compartment 15 and the lower-layer freezing compartment 16 provided at the lower layer thereof.
  • the freezing compartment 141 and the vegetable compartment 17 are partitioned by the heat-insulating partition wall 39.
  • a refrigerating compartment air supply duct 24 partitioned by a partition member 37 made of synthetic resin and supplying cold air to the refrigerating compartment 13 is formed.
  • the partition member 37 is formed with an air outlet 27 for blowing cold air into the refrigerator compartment 13.
  • a refrigerator compartment damper 44 is provided in the refrigerator compartment air supply duct 24.
  • the refrigerator compartment damper 44 is an openable and closable damper driven by a motor or the like, and is used to control the flow rate of cold air supplied to the refrigerator compartment 13 to appropriately maintain the indoor temperature of the refrigerator compartment 13.
  • a freezer compartment air duct 25 for flowing cold air cooled by the cooler 42 to the freezer compartment 141.
  • a cooling chamber 23 is formed further behind the freezing-chamber air supply duct 25, and a cooler 42 as an evaporator for cooling the cold air circulating in the chamber is arranged inside.
  • the cooler 42 is connected to an expansion unit such as a compressor 41, a condenser (not shown), and a capillary (not shown) via a refrigerant pipe, and forms a vapor compression refrigeration cycle circuit.
  • an expansion unit such as a compressor 41, a condenser (not shown), and a capillary (not shown) via a refrigerant pipe, and forms a vapor compression refrigeration cycle circuit.
  • FIG. 3 is a front view showing the schematic configuration of the air supply duct of the refrigerator 10.
  • the refrigerator 10 includes a vegetable compartment air supply duct 26 that connects the refrigerator compartment 13 and the vegetable compartment 17.
  • the cold air supplied to the refrigerator compartment 13 flows into the vegetable compartment air supply duct 26 from the return air opening 31 formed in the lower portion of the refrigerator compartment 13, and is blown out from the air outlet 30 to be supplied to the vegetable compartment 17.
  • a return air port 34 connected to the lower part of the cooling chamber 23 is formed in the vegetable compartment 17, and cold air in the vegetable room 17 flows from the return air port 34 to the lower part of the cooling compartment 23.
  • FIG. 4 and 5 are side cross-sectional views showing the structure near the cooling chamber 23 of the refrigerator 10.
  • FIG. 4 shows the state where the fan cover 61 is opened
  • FIG. 5 shows the state where the fan cover 61 is closed.
  • the cooling chamber 23 is provided on the inner side of the heat insulation box 12 on the back side of the air-blowing passage 25 of the freezing chamber.
  • a partition member 35 made of synthetic resin is partitioned between the cooling chamber 23 and the freezer compartment air supply path 25 or the freezer compartment 141. That is, the cooling chamber 23 is a space formed by sandwiching the inner box 122 and the partition member 35.
  • the freezer compartment air duct 25 formed in front of the cooling compartment 23 is a space formed between the partition member 35 and the partition member 45 assembled in front of it, and serves as the supply air through which the cool air cooled by the cooler 42 flows road.
  • the upper part of the freezer compartment air supply path 25 is connected to the refrigerator compartment air supply path 24.
  • the partition member 45 is formed with an air outlet 28 that is an opening for blowing cold air into the freezing compartment 141.
  • a return air opening 33 for returning cold air from the freezing chamber 141 to the lower portion of the cooling chamber 23 is formed.
  • a defrost heater 43 is provided as a defrost unit that melts and removes frost attached to the cooler 42.
  • the defrost heater 43 is a resistance heating type heater.
  • the partition member 35 in the upper part of the cooling chamber 23 is formed with an air supply port 36 which is an opening connected to the air supply duct 25 of the freezing compartment.
  • a fan 50 for sending cold air to the freezer compartment 141 or the like is arranged in front of the air outlet 36.
  • the fan 50 is a centrifugal fan including a fan 52.
  • a shielding device 60 having a movable fan cover 61 is provided in front of the fan 50.
  • the fan cover 61 approaches the fan 50 from the side of the freezer compartment air supply path 25 to at least partially cover the fan 50 and the air supply opening 36.
  • the fan cover 61 is driven by the drive shaft 62 provided on the partition member 45 side and moves in the front-rear direction. As the fan cover 61 moves forward and separates from the fan 50, a cool air path is formed between the fan cover 61 and the partition member 45. Thereby, the cold air cooled by the cooler 42 is sent out by the fan 50, and is supplied to the refrigerator compartment 13, the freezing compartment 141, and the vegetable compartment 17.
  • the surface of the fan cover 61 facing the fan 50 is formed into a substantially concave shape. Thereby, the fan cover 61 can block the blower 36 without contacting the fan 52 of the blower 50 arranged in front of the blower 36.
  • the opening and closing operation of the above-mentioned shielding device 60 is controlled by a control device 70 described later. For example, during a defrosting operation for removing frost adhering to the cooler 42, as shown in FIG. 5, the fan cover 61 is closed.
  • the cold air sent by the fan 50 is sent to the refrigerator compartment 13, the freezing compartment 141, and the vegetable compartment 17.
  • the cold air after cooling the refrigerator compartment 13, the freezing compartment 141, and the vegetable compartment 17 is returned to the cooling compartment 23 via the return air path.
  • the moisture contained in the storage items stored in the refrigerator compartment 13, the freezer compartment 141, and the vegetable compartment 17 is returned to the cooling compartment 23 and adheres to the cooler 42 to frost. If this frost builds up, it will hinder the air supply and heat exchange in the cooling chamber 23, so the defrosting operation is performed.
  • the control device 70 described later stops the compressor 41 and the fan 50, closes the blower 36 with the fan cover 61, closes the refrigerator compartment damper 44, and energizes the defrosting heater 43.
  • the inside of the cooling chamber 23 becomes warm, and the frost adhered to the cooler 42 melts.
  • the control device 70 described later stops the energization of the defrosting heater 43, starts the compressor 41, and starts the cooling performed by the freezing circuit. Then, after detecting that the cooler 42 and the cooling chamber 23 are cooled to a predetermined temperature or after a predetermined time elapses in a timer or the like, the control device 70 opens the fan cover 61 and starts the fan 50 as shown in FIG. 4 Running. Thus, the cooling operation can be restarted.
  • the shielding device 60 since the shielding device 60 is disposed closest to the cooling chamber 23, if the above-mentioned moisture adheres to the shielding device 60, the driving mechanism of the shielding device 60 may freeze, and the opening and closing operation can no longer be performed. In this embodiment, as will be described later, in a situation where the driving mechanism of the shielding device 60 is more likely to freeze, the driving mechanism of the shielding device 60 is prevented from becoming difficult to operate by increasing the torque of the motor driving the shielding device 60 Situation.
  • FIG. 6 is an exploded perspective view of the shielding device 60 viewed from above the rear side.
  • the shielding device 60 includes a fan cover 61 that can open and close the fan 50 from the outside of the cooling chamber 23, a drive shaft 62 that drives the fan cover 61 to open and close from the opposite side of the cooling chamber 23, and a support base 63 It not only supports the fan 50, but also supports the fan cover 61 and the drive shaft 62 freely.
  • the shielding device 60 is disposed between the storage compartment side cover 64 which is a part of the partition member 45 partitioning the freezing compartment 141 and the cooling compartment side cover 69 which is a part of the partition member 35 partitioning the freezing compartment air supply duct 25 between.
  • the shielding device 60 is attached to the rear of the storage compartment side cover 64 that constitutes a part of the partition member 45.
  • a recess 65 that is recessed forward is formed behind the partition member 45, and the shielding device 60 is accommodated in the recess 65.
  • the fan cover 61 is a cover-shaped member capable of properly closing the fan 50, and has a main surface portion 80 and a side surface portion 81 that is erected rearward from the peripheral edge portion of the main surface portion 80.
  • the side portion 81 is erected from the side peripheral edge and the lower peripheral edge of the main surface portion 80, and the side portion 81 is not erected on the upper peripheral edge of the main surface portion 80.
  • An opening 82 is formed in the upper end portion of the fan cover 61.
  • a guide hole 67 fitted to a guide pin 66 of a support base 63 described later is disposed outside the side portion 81.
  • an opening 801 is formed in the vicinity of the center of the main surface 80 of the fan cover 61, and the opening 801 is a screw hole that penetrates a substantially circular shape and has a screw groove formed inside.
  • the support base 63 is formed with a substantially cylindrical guide pin 66 that slidably supports the fan cover 61 in the front-rear direction.
  • two guide pins 66 are provided, and each extends from the main surface of the support base 63 toward the rear substantially parallel to the rotation axis of the fan 52.
  • a guide hole 67 into which the guide pin 66 is slidably fitted is formed.
  • the fan support portion 77 has a cylindrical shape, and the rear end portion thereof penetrates the through-hole 78 formed in the main surface of the fan cover 61 and contacts the front surface of the flange portion 79 of the fan 50.
  • the fan support portion 77 and the flange portion 79 of the fan 50 are fastened by fastening means such as screws.
  • partition member support portions 76 are vertically erected from the lower portion of the main surface of the support base 63 toward the rear. The rear end of the partition member support portion 76 abuts on the cooling chamber side cover 69 of the partition member 35 and is fastened with screws or the like.
  • a drive shaft 62 for moving the fan cover 61 in the front-rear direction is attached to the support base 63.
  • the drive shaft 62 is rotatably supported by a shaft support portion 86 formed on the support base 63.
  • the drive shaft 62 has a trunk portion 621 formed in a cylindrical shape, and a screw thread (not shown) is spirally formed on the outer surface of the trunk portion 621.
  • the thread of the main portion 621 of the drive shaft 62 is screwed into the screw groove of the opening 801 of the fan cover 61. That is, a screw mechanism is formed between the fan cover 61 and the drive shaft 62.
  • a stepping motor (not shown) is built into the support base 63, and the drive shaft 62 rotates by a predetermined angle by the driving force of the stepping motor.
  • the fan 50 is provided at a position covering the air outlet 36, and is arranged on the front side of the air outlet 36, that is, the freezing compartment 141 side.
  • a centrifugal fan that sends cold air in a centrifugal direction can be used, and specifically, a turbo fan can be used.
  • the connection structure of the refrigerator 10 will be described with reference to the block diagram of FIG. 7.
  • the refrigerator 10 has a control device 70 as a CPU, a temperature sensor 91, a timer 92, a compressor 41, a fan 50, a motor 93, a refrigerator door 44 and a defrosting heater 43.
  • the temperature sensor 91 and the timer 92 are connected to the input side terminal of the control device 70.
  • the compressor 41, the fan 50, the motor 93, the refrigerator door 44, and the defrost heater 43 are connected to the output-side terminal of the control device 70.
  • the temperature sensor 91 is arranged inside the refrigerator compartment 13, the freezer compartment 141, and the vegetable compartment 17, respectively, and transmits information indicating the indoor temperature of each storage compartment to the control device 70.
  • the timer 92 measures the cooling time for cooling the refrigerator compartment 13, the freezing compartment 141, and the vegetable compartment 17, the operation time of the defrost heater 43, and the like, and transmits information indicating the time to the control device 70.
  • the compressor 41 compresses the refrigerant used in the refrigeration circuit as described above according to the instruction from the control device 70.
  • the fan 50 sends the cold air cooled by the cooler 42 of the freezing circuit to each storage room as described above according to the instruction from the control device 70.
  • the motor 93 rotates the drive shaft 62 of the shielding device 60 by a predetermined angle according to an instruction from the control device 70.
  • a stepping motor is used as the motor 93.
  • the refrigerating compartment damper 44 appropriately blocks the cold air sent to the refrigerating compartment ventilation air passage 24 in accordance with an instruction from the control device 70.
  • the defrost heater 43 is energized in accordance with an instruction from the control device 70 to warm the air inside the cooling chamber 23.
  • the high-temperature and humid storage object is stored in the refrigerator compartment 13.
  • the high-temperature and humid storage objects are hot pots and soups, for example.
  • the moisture emitted from the stored object with high temperature and high humidity reaches the cooling chamber 23 via the vegetable compartment supply air passage 26, the vegetable compartment 17, and the return air port 34.
  • the shielding device 60 is adjacent to the air outlet 36 of the cooling chamber 23, if this moisture adheres to the shielding device 60 and freezes, the opening and closing operation of the shielding device 60 may be hindered. Specifically, referring to FIG.
  • a screw mechanism composed of a screw formed around the trunk portion 621 of the drive shaft 62 and a screw groove formed in the opening 801 of the fan cover 61 may freeze and become rigid. Therefore, in the present embodiment, if a high-temperature and humid storage object is stored in the refrigerator compartment 13, this state is detected as an abnormal state, and the torque is increased by reducing the rotation speed of the motor driving the above-mentioned shielding device 60. To prevent the screw mechanism of the shielding device 60 from freezing and becoming rigid. The control method will be described in detail below.
  • step S10 the control device 70 determines whether the temperature inside the freezer compartment 141 measured by the temperature sensor 91 is -5°C or lower. If the temperature inside the freezer compartment 141 is -5°C or lower, that is, step S10 is YES, the control device 70 moves to step S11 described below to determine whether the refrigerator 10 is in an abnormal state. On the other hand, if the inside temperature of the freezer compartment 141 is higher than -5°C, that is, step S10 is NO, the control device 70 moves to step S31 and continues the freezer compartment 141 etc. by operating the compressor 41 Cooling operation.
  • step S11 it is determined whether the compressor 41 is in an ON state.
  • one cycle is passed to confirm whether the condition inside the refrigerator compartment 13 is abnormal.
  • the “one cycle” refers to the period from the power-on state of the compressor 41 to the next power-on state, or from the power-off (OFF) state of the compressor 41 to the next power-off state.
  • one cycle period is one hour, by ensuring the confirmation time for one cycle period, that is, one hour, it is possible to reliably detect the abnormal state, which is the state in which the high-temperature and humid storage object is placed in the refrigerator compartment 13.
  • step S11 When the compressor 41 is turned on, that is, when YES in step S11, the control device 70 moves to step S12, and determines whether the heat insulation door 18 is opened or closed. Since the user opens and closes the heat insulation door 18 when the user puts the stored object into the refrigerator compartment 13, by judging the opening and closing of the heat insulation door 18, it is possible to determine whether to put the stored object into the refrigerator compartment 13.
  • the control device 70 sets the flag F1 to 1 in step S13 .
  • the symbol F1 is a symbol indicating that the heat insulation door 18 is opened and closed when the compressor 41 is turned on.
  • the control device 70 does not set the flag F1 It becomes 1, keeps 0 unchanged, and moves to step S14.
  • step S14 the control device 70 determines whether the flag F2 is not set to 1.
  • the flag F2 is set to 1 when the heat insulation door 18 is opened and closed in the off state of the compressor 41, and is set to 0 when this is not the case.
  • the control device 70 performs abnormality detection until the next compressor 41 is turned off to the turned on state.
  • control device 70 does not continue to detect the abnormal state of the environment in the box after step S16, and returns to step S10.
  • step S15 the control device 70 determines whether the flag F1 is set to 1. If the flag F1 is set to 1, that is, in the case of YES in step S15, since the heat insulation door 18 is opened and closed, there is a possibility that there is a high-temperature stored object in the refrigerating compartment 13, and the transfer is performed Go to step S16. On the other hand, if the flag F1 is not set to 1, that is, in the case of NO in step S15, since the heat insulation door 18 is not opened or closed, there is no high-temperature stored object in the refrigerator compartment 13 and therefore Without detecting the abnormal state, it returns to step S10.
  • step S16 the control device 70 determines whether the temperature increase in the compartment of the refrigerator compartment 13 is 6°C or more before and after step S12, that is, before and after the heat insulation door 18 is opened and closed. If the temperature inside the refrigerator compartment 13 rises to 6° C. or higher, it can be determined that hot objects such as hot pots have been placed in the refrigerator compartment 13. If the temperature inside the refrigerator compartment 13 rises to 6° C. or higher, that is, if YES in step S16, the control device 70 detects an abnormal state in step S18. On the other hand, if the temperature increase in the refrigerator compartment 13 is less than 6°C, that is, if step S16 is NO, then the control device 70 moves to step S17.
  • step S17 the control device 70 determines whether the time for cooling operation of the refrigerator compartment 13 by operating the compressor 41 and the fan 50 has exceeded 30 minutes. By performing this determination, it can be determined that the high-temperature storage object is stored in the refrigerator compartment 13 and it takes a long time to cool it. If the operation time has passed 30 minutes or more, that is, if YES in step S17, the control device 70 determines that there is a high-temperature storage object in the refrigerator compartment 13, and detects an abnormal state in step S18.
  • step S17 if the operation time has not elapsed for more than 30 minutes, that is, if NO in step S17, it is determined that there is no high-temperature storage object in the refrigerator compartment 13, and an abnormal state is not detected, and the process moves to step S21.
  • step S11 is NO, that is, when the compressor 41 is off
  • the control device 70 moves to step S24, and when the compressor 41 is off, use The abnormal state is detected in the same manner as the above steps S12 to S17.
  • step S11 when the compressor 41 is in the off state, that is, in the case of NO in step S11, the control device 70 moves to step S24 to determine whether the heat insulation door 18 is opened or closed.
  • step S24 When there is a possibility that the storage door is put in the refrigerator compartment 13 due to the opening and closing of the heat insulation door 18, that is, in the case of YES in step S24, the control device 70 sets the flag F2 in step S25 to 1. On the other hand, when the heat insulation door 182 has not been opened and closed, that is, when the step S24 is NO, the storage device is not placed in the refrigerator compartment 13, so the control device 70 does not set the flag F2 It becomes 1, keeps 0 unchanged, and moves to step S26.
  • step S26 the control device 70 determines whether the flag F1 is not set to 1. As described above, the flag F1 is set to 1 when the heat insulating door 18 is opened and closed when the compressor 41 is turned on, and set to 0 when not.
  • step S26 When the flag F1 is not 1, that is, when the step S26 is YES, since one cycle of the compressor 41 has not passed, the process moves to step S27, and the abnormal state detection is continued.
  • the flag F1 in other words, in the case of “No” in step S26, it means that the heat insulation door 18 is opened and closed when the compressor 41 is turned on, so until the next time the compressor 41 Abnormality detection is performed from when the power-on state is reversed to the power-off state. Therefore, the control device 70 does not continue to detect the abnormal state after step S27, but moves to step S21. In this manner, the control device 70 detects an abnormal state from when the compressor 41 is turned on until it becomes the next turned-on state, or from when the compressor 41 is turned off until it becomes the next turned-off state.
  • step S27 the control device 70 determines whether the flag F2 is set to 1. If the flag F2 is set to 1, that is, in the case of YES in step S27, since the heat insulation door 18 is opened and closed, there is a possibility that there is a high-temperature stored object in the refrigerating compartment 13, so the process moves to Step S28. On the other hand, if the flag F2 is not set to 1, that is, in the case of “No” in step S27, since the heat insulation door 18 is not opened and closed, there will be no high-temperature stored objects in the refrigerator compartment 13, and therefore no The abnormal state is detected, and the process moves to step S21.
  • step S28 the control device 70 determines whether the temperature increase in the compartment of the refrigerator compartment 13 is 6°C or more before and after opening and closing the heat insulation door 18. If the temperature inside the refrigerator compartment 13 rises to 6° C. or higher, that is, if YES in step S28, the control device 70 detects an abnormal state in step S18. On the other hand, if the temperature increase in the refrigerator compartment 13 is less than 6°C, that is, if step S28 is NO, the control device 70 moves to step S29.
  • step S29 the control device 70 determines whether the time for cooling the refrigerator compartment 13 by operating the compressor 41 and the fan 50 has exceeded 30 minutes. If the operation time has elapsed for 30 minutes or more, that is, if YES in step S29, it is determined that there is a high-temperature storage object in the refrigerator compartment 13, and an abnormal state is detected in step S18. On the other hand, if the operation time has not elapsed for more than 30 minutes, that is, if NO in step S29, it is determined that there is no high-temperature storage object in the refrigerator compartment 13, and an abnormal state is not detected, and the process moves to step S21.
  • the control device 70 determines in step S19 whether or not the temperature inside the refrigerator compartment 13 has reached the shutdown point.
  • the shutdown point is the temperature at which the refrigerator compartment 13 is sufficiently cooled to stop the compressor 41 of the freezing circuit. If the temperature inside the refrigerator compartment 13 reaches the shutdown point, that is, in the case of YES in step S19, since the storage items stored in the refrigerator compartment 13 are sufficiently cooled, the control device 70 releases the abnormal state in step S20. Set the flag F1 to 0 and the flag F2 to 0. The method of resetting the flags F1 and F2 will be described later with reference to FIG. 10. On the other hand, if the temperature inside the refrigerator compartment 13 does not reach the shutdown point, that is, in the case of NO in step S19, the refrigerator compartment 13 is not sufficiently cooled, so the control device 70 returns to step S10 to continue cooling Run.
  • step S21 the control device 70 confirms whether or not it is within two cycles after performing the defrosting operation. If it is within two cycle periods, that is, if step S21 is YES, the control device 70 moves to step S22 in order to perform the operation at the time of abnormality. On the other hand, if it is not within two cycle periods, that is, if step S21 is "NO", the control device 70 does not perform an abnormal operation, and returns to step S10.
  • control device 70 can perform torque enhancement in step S23, which will be described later, for one continuous cycle or more. Therefore, the effect of preventing freezing of the drive shaft 62 and the fan cover 61 becomes greater.
  • step S23 the motor 93 is decelerated to prevent freezing, but if the motor 93 is decelerated, the motor noise becomes louder. For this reason, by limiting the period during which the motor 93 is decelerated to within two cycle periods, the time during which the motor sound becomes louder can be limited.
  • step S22 the control device 70 determines whether an abnormal state is detected in step S18 described above. If an abnormal state is detected, that is, if YES in step S22, the control device 70 moves to step S23. On the other hand, if an abnormal state is not detected, that is, if NO in step S22, the control device 70 moves to step S30.
  • step S23 the control device 70 decelerates the driving speed of the motor 93 that drives the opening and closing of the shielding device 60.
  • the control device 70 changes the drive speed of the motor 93 from 500 PPS to 150 PPS. In this way, it is possible to prevent the shielding device 60 from being inoperable due to the freezing described above.
  • a part of the water flowing inside the refrigerator 10 is stored between the trunk portion 621 of the drive shaft 62 shown in FIG. 6 and the opening portion 801 of the fan cover 61 due to the storage of the high-temperature and humid stored objects in the refrigerator compartment 13. . If the attached moisture freezes, the screw mechanism formed between the trunk portion 621 and the opening 801 becomes rigid. As a result, even if the motor 93 is rotated based on the instruction of the control device 70, the stiffened drive shaft 62 cannot be rotated, and there is a possibility that the fan cover 61 cannot be moved in the front-rear direction.
  • step S23 the control device 70 reduces the driving speed of the motor 93 of the stepping motor to 150 PPS.
  • FIG. 9 is a graph showing the relationship between the driving frequency of a stepping motor and torque.
  • the horizontal axis represents the driving frequency of the stepping motor
  • the vertical axis represents the torque of the stepping motor.
  • the drive frequency and torque have a negative correlation, and if the drive frequency is lowered, the torque becomes larger.
  • the torque of the motor 93 is increased from about 20N to about 30N.
  • the torque of the motor 93 can be increased by about 1.5 times. Therefore, referring to FIG. 6, even if a small amount of moisture exists between the trunk portion 621 of the drive shaft 62 and the opening 801 of the fan cover 61, the drive shaft 62 can be rotated with a large torque of the motor 93 to prevent driving The shaft 62 becomes rigid due to freezing.
  • step S22 if an abnormal state is not detected, that is, if NO in step S22, there is no possibility that the drive shaft 62 freezes, so the drive frequency of the motor 93 is maintained at high speed while maintaining 500 PPS.
  • FIG. 10(A) is a flowchart showing step S20 in detail
  • FIG. 10(B) is a diagram showing a case where an abnormality detection period is included from the start of the compressor 41 until the next start
  • FIG. 10(C) It is a diagram showing a case where the abnormality detection period is included from the stop of the compressor 41 until the next stop.
  • step S20 for resetting F1 and F2 includes steps S2001 to S2012.
  • step S2001 the control device 70 determines whether the compressor 41 is moved from the off state to the on state, that is, whether the compressor 41 is started. If the compressor 41 moves from the off state to the on state, that is, in the case of YES in step S2001, the control device 70 moves to step S2002. On the other hand, if the compressor 41 has not shifted from the off state to the on state, that is, in the case of NO in step S2001, the control device 70 moves to step S2007.
  • step S2002 the control device 70 determines whether F2 is set to 1. If F2 is set to 1, that is, if step S2002 is YES, the control device 70 moves to step S2003. On the other hand, if F2 is not set to 1, that is, if NO in step S2002, the control device 70 moves to step S21. As described above, the flag F2 is set to 1 when the heat insulating door 18 is opened and closed in the off state of the compressor 41, and is set to 0 when this is not the case.
  • step S2003 the control device 70 confirms whether the compressor power-on count is 1.
  • the compressor start-up count is a flag indicating that the compressor 41 starts after the user opens the door. If the compressor 41 is started after the user opens the door, the compressor power-on count is set to 1, otherwise, the compressor power-on count is set to 0. If the compressor start-up count is 1, that is, if step S2003 is YES, the control device 70 moves to step S2005. On the other hand, if the compressor power-on count is not 1, that is, if step S2003 is "NO", the control device 70 moves to step S2004.
  • step S2004 the control device 70 sets the compressor power-on count to 1.
  • step S2005 since the abnormality detection period ends, the control device 70 sets the compressor power-on count to 0. Furthermore, in step S2006, the control device 70 resets by setting F2 to 0.
  • step S2001 to step S2006 by performing step S2001 to step S2006, the period from the opening and closing of the heat insulation door 18 for the input of food materials until the activation of the compressor 41 twice can be used as the abnormality detection period.
  • step S2007 the control device 70 determines whether the compressor 41 has moved from the on state to the off state, that is, whether the compressor 41 has stopped. If the compressor 41 shifts from the power-on state to the power-off state, that is, a YES condition in step S2007, the control device 70 moves to step S2008. On the other hand, if the compressor 41 has not moved from the power-on state to the power-off state, that is, in the case of NO in step S2007, the control device 70 moves to step S21.
  • step S2008 the control device 70 determines whether F1 is set to 1. If F1 is set to 1, that is, if step S2008 is YES, the control device 70 moves to step S2009. On the other hand, if F1 is not set to 1, that is, if NO in step S2008, the control device 70 moves to step S21.
  • the mark F1 is a mark indicating that the heat insulating door 18 is opened and closed when the compressor 41 is turned on.
  • step S2009 the control device 70 determines whether the compressor shutdown count is 1.
  • the compressor shutdown count is a flag indicating that the compressor 41 stops (moves from the power-on state to the power-off state) after the user opens the heat insulation door 18. If the compressor 41 is stopped after the user opens the heat insulation door 18, the compressor shutdown count is set to 1, otherwise, the compressor shutdown count is set to 0. If the compressor shutdown count is 1, that is, if step S2009 is YES, the control device 70 moves to step S2011. On the other hand, if the compressor shutdown count is not 1, that is, if NO in step S2009, the control device 70 moves to step S2010.
  • step S2010 the control device 70 sets the compressor shutdown count to 1.
  • step S2011 since the abnormality detection period ends, the control device 70 sets the compressor shutdown count to 0. Further in step S2012, the control device 70 resets by setting F1 to 0.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)

Abstract

La présente invention concerne un réfrigérateur (10), comprenant : un refroidisseur (42) d'une boucle de refroidissement utilisée pour refroidir l'air fourni à une chambre de stockage au moyen d'un trajet d'air d'alimentation en air; une chambre de refroidissement (23) pourvue du refroidisseur (42) et formée avec un orifice d'alimentation en air relié à la chambre de stockage; un ventilateur (50) utilisé pour fournir l'air fourni par l'orifice d'alimentation en air (36) à la chambre de stockage; un dispositif de protection (60) bloquant au moins partiellement l'orifice d'alimentation en air (36); et un dispositif de commande (70). De plus, le dispositif de protection (60) comporte : un couvercle de ventilateur (61) recouvrant le ventilateur (50) depuis le côté externe de la chambre de refroidissement (23); un arbre d'entraînement (62) entraînant l'ouverture et la fermeture du couvercle de ventilateur (61); un mécanisme à vis formé entre l'arbre d'entraînement (62) et le couvercle de ventilateur (61); et un moteur électrique (93) permettant à l'arbre d'entraînement (62) de tourner. En outre, le dispositif de commande (70) permet au moteur électrique (93) de décélérer lorsque l'environnement dans le réfrigérateur de la chambre de stockage est prédéfini.
PCT/CN2019/122645 2018-12-10 2019-12-03 Réfrigérateur WO2020119516A1 (fr)

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CN104896828A (zh) * 2015-05-21 2015-09-09 青岛海尔股份有限公司 冰箱
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CN201973991U (zh) * 2011-01-12 2011-09-14 南京中竞科电子科技有限公司 一种节能型冰箱风门
JP2013002664A (ja) 2011-06-14 2013-01-07 Hitachi Appliances Inc 冷蔵庫
CN202204232U (zh) * 2011-07-21 2012-04-25 镇江市松协电器有限公司 电冰箱电动风门
CN104896828A (zh) * 2015-05-21 2015-09-09 青岛海尔股份有限公司 冰箱
CN106247741A (zh) * 2016-07-12 2016-12-21 青岛海尔股份有限公司 一种冰箱

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CN112243481A (zh) 2021-01-19
JP2020094710A (ja) 2020-06-18
EP3896368A4 (fr) 2022-02-09
EP3896368B1 (fr) 2023-08-16
EP3896368A1 (fr) 2021-10-20

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