WO2020119550A1 - 冰箱 - Google Patents

冰箱 Download PDF

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Publication number
WO2020119550A1
WO2020119550A1 PCT/CN2019/123013 CN2019123013W WO2020119550A1 WO 2020119550 A1 WO2020119550 A1 WO 2020119550A1 CN 2019123013 W CN2019123013 W CN 2019123013W WO 2020119550 A1 WO2020119550 A1 WO 2020119550A1
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WO
WIPO (PCT)
Prior art keywords
fan
fan cover
opening
action
motor
Prior art date
Application number
PCT/CN2019/123013
Other languages
English (en)
French (fr)
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 CN201980028126.0A priority Critical patent/CN112262289B/zh
Priority to EP19895386.1A priority patent/EP3896369B1/de
Publication of WO2020119550A1 publication Critical patent/WO2020119550A1/zh

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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
    • F25B2500/00—Problems to be solved
    • F25B2500/12—Sound
    • 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. 14 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. 15.
  • 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. 14, 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 fan cover 110 opens the opening 106
  • the fan cover 110 moves forward by the driving force of the motor.
  • the front end of the fan cover 110 comes into contact with other members, a large operation sound is generated along with the contact.
  • an overstep operation may be performed to further rotate the motor after the rear end of the fan cover 110 abuts the partition wall 105.
  • the components arranged around the fan cover 110 resonate with the motor, and there is a problem that a large noise is generated. This problem may also occur when the fan cover 110 is opened.
  • An object of the present invention is to provide a refrigerator capable of reducing the operation sound generated by the opening and closing operation of the fan cover.
  • the present invention provides a refrigerator including: a cooler of a freezing loop that cools air supplied to a storage room via an air path; a cooling room equipped with the cooler, And form an air supply port connected to the storage room; a fan that sends the air supplied from the air supply port toward the storage room; a shielding device that at least partially blocks the air supply port; and a control device , Which controls the operation of the freezing loop, the fan, and the shielding device, the shielding device has: a fan cover that covers the fan from the outside of 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, the control device rotates the drive shaft in one direction , So that the fan cover approaches the fan, and performs a closing action to close the air path, and the control device rotates the drive shaft in the other direction to move the fan cover away from the fan , An opening action to open the air path is performed, and the control
  • the refrigerator of the present invention when the closing operation or opening operation of the fan cover is performed, by performing the mute operation during the termination thereof, the noise generated from the shielding device can be reduced.
  • the mute action is an action to reduce the rotation speed of the motor.
  • the refrigerator of the present invention by reducing the rotation speed of the motor during the termination period, the noise generated from the shielding device can be reduced.
  • the rotation speed of the electric motor is made to be less than half of the normal opening and closing operation.
  • the noise generated from the shielding device can be further reduced.
  • the mute operation is an operation to intermittently rotate the motor.
  • the refrigerator of the present invention when the closing operation or the opening operation of the fan cover is performed, by intermittently operating the rotation of the motor during its termination, the noise generated from the shielding device can be reduced.
  • the control device makes the rotation speed of the motor at a low speed during the termination of the closing action or the opening action to realize the mute action, and performs the initial action At this time, during the termination of the closing operation or the opening operation, the motor is intermittently rotated to realize the mute operation.
  • the refrigerator of the present invention when the fan cover is opened and closed during the normal cooling operation of the refrigerator, by making the motor at a low speed during the termination period, the noise generated from the shielding device can be reduced.
  • the initial operation for detecting the position of the fan cover is performed, during the termination of the closing operation or the opening operation, by intermittently rotating the motor, the operating sound accompanying the initial operation is reduced.
  • the beneficial effect of the present invention is that when the refrigerator of the present invention performs the closing operation or opening operation of the fan cover, by performing the mute operation during its termination, the noise generated from the shielding device can be reduced.
  • 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.
  • 9(A) is a cross-sectional view of the opening operation of the shielding device.
  • 9(B) is a cross-sectional view of the closing operation of the shielding device.
  • FIG. 10 is a graph showing the relationship between the number of steps and the rotational speed of the motor when the low-speed operation is performed as the silent operation during the opening and closing operation of the shielding device of the refrigerator of the present invention.
  • FIGS. 11(A) to 11(B) are graphs of characteristics when an intermittent motion is performed as a silent motion during opening and closing operations of the shutter of the refrigerator of the present invention, where FIG. 11(A) shows the number of steps and the rotation of the motor For the relationship of speed, FIG. 11(B) shows the relationship between the elapsed time and the rotation speed of the motor.
  • FIG. 12(A) to 12(B) are graphs of the effect of the shielding device of the present invention, wherein FIG. 12(A) shows the magnitude of the action sound following the overstepping motion of the shielding device according to the comparative example. 12(B) shows the magnitude of the action sound following the overstepping action of the masking device.
  • FIGS. 13(A) to 13(B) are graphs of the effect of the shielding device of the present invention, wherein FIG. 13(A) is a graph of magnitudes of operating sounds following opening and closing operations of the shielding device according to the comparative example.
  • FIG. 13(B) is a graph showing the magnitude of the operating sound with the opening and closing operation of the shielding device.
  • FIG. 14 is a side cross-sectional view of a conventional refrigerator in the background art.
  • 15 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 a heat-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 constitutes a vapor compression type 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 constitutes a vapor compression type 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 a state where the fan cover 61 is opened
  • FIG. 5 shows a 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 below the cooler 42 as a defrosting unit that melts and removes frost adhering 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 and at least partially covers the fan 50 and the air supply opening 36.
  • 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 disposed in front of the blower 36.
  • the fan cover 61 is driven by a drive shaft 62 provided on the partition member 45 side and moves in the front-rear direction. Specifically, in the opening operation, the motor 93 and the drive shaft 62 rotate in one direction based on an instruction of the control device 70 described later, so that the fan cover 61 moves away from the fan 50, that is, forward. As a result, the air outlet 36 is not blocked, and 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 motor 93 and the drive shaft 62 rotate in the other direction based on the instruction of the control device 70 described later, so that the fan cover 61 moves toward the fan 50, that is, backward.
  • the air outlet 36 is blocked, and the air passage through which cold air flows in the upper freezing compartment 15 and the like is blocked.
  • the cold air is sent out to the refrigerator compartment 13 through the refrigerator compartment air supply passage 24.
  • 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. As a result, the inside of the cooling chamber 23 becomes warm, and the frost attached 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.
  • 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 near 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.
  • a substantially cylindrical guide pin 66 that slidably supports the fan cover 61 in the front-rear direction is formed on the support base 63.
  • 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 in the fan cover 61.
  • 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. On the outer surface of the trunk portion 621, a screw thread (not shown) is formed in a spiral shape. The thread of the trunk 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.
  • the shaft support portion 86 supporting the base 63 incorporates a motor 93 (not shown). Based on the driving force of the motor 93, the drive shaft 62 rotates at a predetermined angle. When the drive shaft 62 is rotated in one direction, the fan cover 61 approaches the fan 50, and as shown in FIG. 5, the air passage is closed. On the other hand, if the motor rotates the drive shaft 62 in the other direction, the fan cover 61 moves away from the fan 50 and, as shown in FIG. 4, the air path is opened.
  • 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 vortex 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 operating 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 an 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.
  • FIG. 8 is a flowchart showing the method for controlling the opening and closing of the fan cover 61.
  • 9(A) is a cross-sectional view showing the shielding device 60 at the end of the opening operation
  • FIG. 9(B) is a cross-sectional view showing the shielding device 60 at the end of the closing operation.
  • FIG. 10 is a graph showing the relationship between the number of steps of the motor 93 and the rotation speed.
  • FIG. 11(A) is a graph showing the number of steps and the number of rotations of the motor 93 when the fan cover 61 is opened and closed.
  • FIG. 11(B) is a graph showing the relationship between the operation time and the number of rotations of the motor 93 in the intermittent operation.
  • the mute operation is performed during the termination of the closing operation of the fan cover 61.
  • the termination period refers to the period from immediately before the fan cover 61 comes into contact with other members during the opening and closing operation of the fan cover 61 until the motor 93 stops.
  • the termination period refers to the period from immediately before the fan cover 61 comes into contact with other members to the end of the overstepping operation.
  • steps 0 to 1750 are the period during which the normal opening and closing operation is performed
  • steps 1751 to 1940 are the termination period.
  • the mute operation there are a low-speed operation described later with reference to FIG. 10 and an intermittent operation described later with reference to FIGS. 11(A) and 11(B).
  • the operation sound accompanying the rotation of the motor 93 can be reduced, and the discomfort felt by the user can be reduced.
  • step S10 the control device 70 determines whether the fan cover 61 is performing an opening operation or a closing operation. If the fan cover 61 is performing an opening operation or a closing operation, that is, YES in step S10, the control device 70 shifts to step S11. On the other hand, if the fan cover 61 does not perform the opening operation or the closing operation, that is, NO in step S10, the control device 70 ends without performing the mute operation.
  • step S11 the control device 70 determines whether the normal cooling operation is being performed.
  • the normal cooling operation refers to, referring to FIG. 2, based on an instruction from the control device 70, the air in the cooling chamber 23 cooled by the cooler 42 is sent to each storage room by the fan 50 to cool each storage room Action to a given cooling temperature range.
  • step S11 If the normal cooling operation is being executed, that is, YES in step S11, the control device 70 shifts to step S12. On the other hand, if the normal cooling operation is not performed, that is, NO in step S11, the control device 70 shifts to step S16.
  • control device 70 performs a low-speed operation as the above-mentioned mute operation.
  • step S12 by rotating the motor 93 at a normal speed, the fan cover 61 is moved at a relatively high speed.
  • the opening and closing operation of the fan cover 61 includes a normal opening and closing operation and a low-speed operation during the termination period.
  • the normal opening and closing operation in step S12 is, for example, an operation during a period from 0 steps to 1750 steps, and the number of rotations of the motor 93 is set to 500 PPS.
  • step S13 the control device 70 determines whether the fan cover 61 has reached the end period. Specifically, referring to FIG. 10, if the number of steps of the motor 93 reaches 1750 steps, the control device 70 determines that the fan cover 61 has reached the end period. On the other hand, if the number of steps of the motor 93 is 1750 or less, the control device 70 determines that the fan cover 61 has not reached the end period.
  • step S13 If the fan cover 61 reaches the termination period, that is, step S13 is YES, the control device 70 shifts to step S14. On the other hand, if the fan cover 61 has not reached the end period, that is, NO in step S13, the control device 70 returns to step S12, rotates the motor 93 at the normal speed, and continues the normal opening and closing operation of the fan cover 61 .
  • step S14 during the termination of the opening and closing operation, the motor 93 is rotated at a low speed.
  • the low-speed operation as a silent operation here is, for example, an operation in the period from step 1751 to step 1940.
  • the rotation speed of the motor 93 in the low-speed operation is set to be equal to or less than half of the rotation speed of the motor 93 in the normal opening and closing operation, for example, 250 PPS.
  • step S15 the control device 70 determines whether the opening operation or closing operation of the fan cover 61 has ended.
  • the step S15 will be described with reference to FIG. 9.
  • the screw groove of the fan cover 61 moves to the end of the thread of the drive shaft 62, and the opening operation is ended.
  • the air path communicating from the fan 50 to the freezer compartment 141 is not closed by the fan cover 61, but is opened.
  • the closing operation is completed by bringing the rear end portion of the fan cover 61 into contact with the partition member 35.
  • the air passage communicating with the fan 50 to the freezer compartment 141 is closed by the fan cover 61.
  • step S15 When the fan cover 61 is in contact with other members, that is, YES in step S15, the control device 70 stops the motor 93 and ends the opening and closing operation of the fan cover 61. On the other hand, if the fan cover 61 is not in contact with other members, that is, NO in step S15, the control device 70 returns to step S14, rotates the motor 93 at a low speed, and continues the opening and closing operation of the fan cover 61.
  • the fan cover 61 comes into contact with other members, for example, when the step 1840 is reached.
  • the control device 70 performs the mute operation while opening and closing the fan cover 61.
  • the control device 70 executes an overstepping operation that further rotates the motor 93 in the same direction as before with the fan cover 61 in contact with other members.
  • the control device 70 stops the motor 93.
  • steps S16 to S20 an intermittent action is performed as the above-mentioned mute action.
  • step S16 the control device 70 determines whether the initial operation has been performed.
  • the initial operation refers to an operation of recognizing the position of the fan cover 61 by moving the fan cover 61 to the front end or the rear end with reference to FIG. 5.
  • the initial action is performed when the refrigerator 10 is turned on, for example.
  • step S16 If the initial action has been performed, that is, YES in step S16, the control device 70 shifts to step S17. On the other hand, if the initial operation is not performed, that is, NO in step S16, the control device 70 ends the operation.
  • step S17 by rotating the motor 93 at a normal speed, the fan cover 61 is moved at a relatively high speed.
  • the number of rotations of the motor 93 is set to 500 PPS.
  • step S18 the control device 70 determines whether the fan cover 61 has reached the end period. Specifically, referring to FIG. 11(A), if the number of steps of the motor 93 reaches 1750 steps, the control device 70 determines that the motor 93 has reached the end period.
  • step S18 If the fan cover 61 reaches the termination period, that is, YES in step S18, the control device 70 shifts to step S19. On the other hand, if the fan cover 61 has not reached the end period, that is, NO in step S18, the control device 70 returns to step S17, rotates the motor 93 at the normal speed, and continues the normal opening and closing operation of the fan cover 61 .
  • step S19 during the termination of the opening and closing operation, the motor 93 is intermittently rotated.
  • the intermittent operation will be described with reference to FIGS. 11(A) and 11(B).
  • the normal opening and closing operation is performed from step 0 to step 1750, and the intermittent operation is performed from step 1751 to step 1940.
  • the motor 93 is intermittently rotated at predetermined time intervals. Specifically, after rotating the motor 93 at 500 PPS for 10 steps, the motor 93 is stopped for 10 msec. In step S19, this intermittent operation is repeated. By performing this intermittent operation, the situation in which the fan cover 61 and its surrounding members resonate due to the vibration generated from the motor 93 is suppressed, and the generation of a large operating sound can be suppressed.
  • step S20 the control device 70 determines whether the opening operation or closing operation of the fan cover 61 has ended. In step S20, the same operation as step S15 described above is performed.
  • step S20 When the opening operation or closing operation of the fan cover 61 is completed, that is, YES in step S20, the control device 70 stops the motor 93 and ends the opening and closing operation of the fan cover 61. On the other hand, if the opening operation or closing operation of the fan cover 61 is not completed, that is, NO in step S20, the control device 70 returns to step S19, and the motor 93 is intermittently rotated to continue the opening and closing operation of the fan cover 61 .
  • FIGS. 12(A) and 12(B) the horizontal axis represents the elapsed time, and the vertical axis represents the magnitude of the operation sound. Furthermore, in FIGS. 12(A) and 12(B), the magnitude of the operating sound measured in the rear is indicated by a solid line, and the magnitude of the operating sound measured in the front is indicated by a broken line.
  • FIG. 12(A) shows the action sound generated when the overstep action is performed without performing the mute action. From this figure, it is clear that with the super-step action, a maximum of about 35 dB of action sound is generated.
  • FIG. 12(B) shows a case where an overstepping motion is performed as an intermittent motion as the above-mentioned mute motion. From this figure, it is clear that with the superstep action, a maximum of about 25dB of action sound is generated.
  • FIG. 13(A) shows the operation from the shielding device 60 when the above-mentioned mute operation is not performed, that is, when the rotation speed of the motor 93 is not reduced during the termination of the opening and closing operation of the fan cover 61 sound.
  • FIG. 13(B) shows the operation sound generated from the shielding device 60 when the low-speed operation or the intermittent operation is performed during the termination of the opening and closing operation of the fan cover 61.
  • the shielding device 60 continuously performs opening and closing operations, and the operation sound generated by the opening and closing operations in the vicinity of the shielding device 60 is measured.
  • the horizontal axis represents the elapsed time
  • the vertical axis represents the magnitude of the operation sound generated from the shielding device 60.
  • the operation sound becomes the maximum value at the end of the opening and closing operation, and specifically, the operation sound of 50 dB to 60 dB is generated.
  • the peak of the generated sound is surrounded by a dotted circle.
  • the maximum value of the operating sound generated from the shielding device 60 of the present invention is 40 dB to 50 dB.
  • the operating sound is reduced.
  • it is considered that the reason is that during the termination of the opening and closing operation, by performing the mute operation, the resonance phenomenon between the motor and the surrounding components is prevented.
  • step S15 and step S20 if the fan cover 61 is in contact with other members, the opening and closing operation is ended. However, after the fan cover 61 is in contact with other members, the motor 93 may be further rotated. Super step action. By performing this super-step action, the opening and closing action can be performed more reliably. Thereby, the air passage can be reliably opened and closed during the normal cooling operation, and the initial position of the fan cover 61 can be accurately detected during the initial operation.
  • the low-speed operation is performed as the silent operation
  • the intermittent operation is performed as the silent operation.

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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)
PCT/CN2019/123013 2018-12-10 2019-12-04 冰箱 WO2020119550A1 (zh)

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JP3572186B2 (ja) * 1997-12-01 2004-09-29 三菱電機株式会社 冷蔵庫のダンパー制御装置
JP2011058684A (ja) * 2009-09-09 2011-03-24 Hitachi Appliances Inc ダンパ装置およびダンパ装置を備えた冷蔵庫
KR101595521B1 (ko) * 2012-08-10 2016-02-18 히타치 어플라이언스 가부시키가이샤 문 개방 장치 및 냉장고
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JP6723499B2 (ja) * 2015-12-17 2020-07-15 青島海爾股▲フン▼有限公司 冷蔵庫
JP6889463B2 (ja) 2016-12-06 2021-06-18 アクア株式会社 冷蔵庫
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JPH05264155A (ja) * 1992-03-24 1993-10-12 Mitsubishi Electric Corp 冷蔵庫の制御装置
JP2013002664A (ja) 2011-06-14 2013-01-07 Hitachi Appliances Inc 冷蔵庫
CN104879984A (zh) * 2015-05-21 2015-09-02 青岛海尔股份有限公司 冰箱
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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JP2023073505A (ja) 2023-05-25
JP7495164B2 (ja) 2024-06-04
EP3896369A1 (de) 2021-10-20
CN112262289B (zh) 2023-01-20
JP2020094709A (ja) 2020-06-18

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