WO2019164084A1 - 냉장고 - Google Patents
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- Publication number
- WO2019164084A1 WO2019164084A1 PCT/KR2018/012711 KR2018012711W WO2019164084A1 WO 2019164084 A1 WO2019164084 A1 WO 2019164084A1 KR 2018012711 W KR2018012711 W KR 2018012711W WO 2019164084 A1 WO2019164084 A1 WO 2019164084A1
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- WO
- WIPO (PCT)
- Prior art keywords
- flow path
- bypass flow
- sensor
- evaporator
- bypass
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
- F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
- F25D17/06—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
- F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
- F25D17/06—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation
- F25D17/062—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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
- F25D21/002—Defroster control
- F25D21/006—Defroster control with electronic control circuits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
- F25D21/02—Detecting the presence of frost or condensate
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
- F25D21/06—Removing frost
- F25D21/08—Removing frost by electric heating
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- 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
- F25D2317/067—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 air ducts
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D2500/00—Problems to be solved
- F25D2500/02—Geometry problems
Definitions
- the present specification relates to a refrigerator.
- a refrigerator is a home appliance that can store an object such as food at a low temperature in a storage compartment provided in a cabinet. Since the storage compartment is surrounded by a heat insulating wall, the interior of the storage compartment may be maintained at a temperature lower than an external temperature.
- the storage compartment may be divided into a refrigerating compartment or a freezing compartment according to the temperature band of the storage compartment.
- the refrigerator may include an evaporator for supplying cold air to the storage compartment.
- the air in the storage compartment flows to the space where the evaporator is located and is cooled in a heat exchange process with the evaporator, and the cooled air is supplied to the storage compartment again.
- frost acts as a flow resistance of air
- the refrigerator further includes defrosting means for defrosting the evaporator.
- the defrost cycle is adjusted using the cumulative operating time of the compressor and the outside air temperature.
- the amount of implantation of the evaporator may be large or small.
- the disadvantage of determining the defrosting cycle is not reflected in the various environments. have.
- the cooling performance is deteriorated because the defrosting does not start despite a large amount of defrosting, or the defrosting starts even though the defrosting amount is small, resulting in an increase in power consumption due to unnecessary defrosting.
- the present invention provides a refrigerator capable of determining whether defrosting operation is performed using a parameter that depends on the amount of implantation of the evaporator.
- the present invention provides a refrigerator capable of accurately determining a defrosting necessary time according to the amount of implantation of the evaporator by using a bypass flow path for detecting an implantation.
- the present invention provides a refrigerator capable of minimizing the length of a flow path for detecting an idea.
- the present invention provides a refrigerator capable of accurately determining a defrosting point even when a precision of a sensor used for determining a defrosting point is low.
- the present invention provides a refrigerator in which frost is prevented from being generated around a sensor for sensing an idea.
- the present invention provides a refrigerator in which liquid is prevented from flowing into a bypass flow path for detecting an idea.
- the refrigerator for solving the said subject is provided with the cold air duct inside the inner case which forms a storage chamber, and a cold air duct forms a heat exchange space with an inner case.
- An evaporator is positioned in the heat exchange space, a bypass passage having a recessed shape is formed in the cold air duct, and a sensor is disposed in the bypass passage.
- the senor has a different output value according to the flow rate of the air flowing through the bypass flow path, the defrosting necessary time of the evaporator may be determined using the output value of the sensor.
- the refrigerator of the present embodiment includes defrosting means for removing frost generated on the surface of the evaporator; And a controller for controlling the defrosting means based on an output value of the sensor, and when it is determined that defrosting is necessary, the controller may operate the defrosting means.
- the senor may include a heating element, a sensing element for sensing a temperature of the heating element, and a sensor PC in which the heating element and the sensing element are installed.
- the sensor may further include a sensor housing surrounding the heating element, the sensing element, and the sensor PC.
- the refrigerator may further include a flow channel cover covering the bypass flow path to partition the bypass flow path from the heat exchange space.
- the cold air duct includes a vertically extending surface which is a surface on which the bypass flow path is formed, and the flow path cover extends from the cover plate and the cover plate to cover the bypass flow path.
- the bypass flow path may extend in a straight line shape in the up and down direction so that the length of the bypass flow path is minimized.
- the barrier which is drawn out of the bypass flow passage may include a rear barrier continuously extending from the cover plate and positioned adjacent to the evaporator, a plurality of side barriers extending from left and right spaces apart from the rear barrier, and the plurality of barriers. And a front barrier that is connected to the side barrier and spaced apart from the rear barrier and positioned opposite the evaporator with respect to the rear barrier.
- the cold air duct may further include an inclined surface extending inclined at the end of the upper and lower extension surface, and guides air to the evaporator side.
- the barrier may include a slot to allow air flowing along the inclined surface to flow to the evaporator side.
- the slot provides a passage of air and may be formed in the rear barrier as an example.
- the senor may be disposed to be spaced apart from the bottom wall of the bypass flow path and the flow path cover to prevent frost from being generated around the sensor in the bypass flow path.
- the senor may be disposed to be spaced apart from an inlet and an outlet of the bypass flow path, and may be positioned at a point that bisects the distance between the bottom wall and the cover plate in the bypass flow path.
- the bypass flow path is formed in a vertical direction with the cold air inflow hole formed in the cold air duct so that the air discharged from the outlet of the bypass flow path is prevented from being affected by the flow rate of the air flowing into the cold air inflow hole. It may be arranged to overlap.
- outlet of the bypass passage may be located in an outer region of the restricted region having a diameter larger than that of the blowing fan based on the center of the blowing fan provided in the cold air duct.
- a blocking rib may be provided above the bypass flow path in the cold air duct.
- the left and right minimum lengths of the blocking ribs may be larger than the left and right minimum widths of the bypass flow path, and the entire left and right sides of the bypass flow path may be disposed to overlap the blocking ribs in the vertical direction.
- the defrosting necessary time is determined by using a sensor whose output value varies according to the amount of implantation of the evaporator in the bypass passage, there is an advantage in that the defrosting necessary time can be accurately determined.
- bypass passage extends in a straight line shape in the vertical direction from the cold air duct, there is an advantage that the length of the bypass passage can be minimized.
- the senor since the sensor is located at a point where the influence of the flow change amount is small in the bypass flow path, and is located in the central area of the flow path in the full flow development area, the detection accuracy of the sensor can be improved.
- the senor since the sensor is disposed spaced apart from the bottom of the bypass flow path and the flow path cover, frost is prevented from being generated around the sensor.
- the flow path cover includes a barrier that protrudes outward of the bypass flow path, the flow rate of the bypass flow path before the formation is minimized, and thus the determination accuracy of the defrost need time by the sensor may be improved.
- the blocking rib is provided above the bypass flow passage, it is possible to prevent the liquid from flowing into the bypass flow passage.
- FIG. 1 is a longitudinal sectional view schematically showing the configuration of a refrigerator according to one embodiment of the present invention
- Figure 2 is a perspective view of the cold air duct according to an embodiment of the present invention.
- FIG. 3 is an exploded perspective view showing a state in which a flow path cover and a sensor are separated from a cold air duct;
- FIG. 4 is a diagram showing air flow in a heat exchange space and a bypass flow path before and after implantation of an evaporator
- FIG. 5 is a view schematically showing a state where a sensor is disposed in a bypass flow path.
- FIG. 6 illustrates a sensor according to an embodiment of the present invention.
- FIG. 7 is a diagram showing thermal flow around a sensor according to the flow rate of air flowing through a bypass flow path.
- FIG. 10 is a view showing the flow of air in the state in which the sensor is installed in the bypass flow path.
- FIG 11 is a view showing the arrangement of the bypass flow path and the flow path cover in the cold air duct according to an embodiment of the present invention.
- FIG. 12 is an enlarged view showing ribs for preventing a bypass flow path and defrost water inflow according to an embodiment of the present invention
- FIG. 13 is a view showing a barrier of the flow path cover according to an embodiment of the present invention.
- FIG. 14 is a view showing an amount of change in temperature detected by a sensor according to the protruding length of the barrier.
- FIG. 15 is a sectional view of the barrier taken along the line A-A of FIG. 13; FIG.
- FIG. 16 shows a change in air flow with and without slots in the barrier.
- FIG. 17 is a view illustrating an amount of change in temperature sensed by a sensor according to a length of a slot formed in a barrier.
- FIG. 19 is a control block diagram of a refrigerator according to one embodiment of the present invention.
- first, second, A, B, (a), and (b) may be used. These terms are only for distinguishing the components from other components, and the nature, order or order of the components are not limited by the terms. If a component is described as being “connected”, “coupled” or “connected” to another component, that component may be directly connected or connected to that other component, but between components It will be understood that may be “connected”, “coupled” or “connected”.
- FIG. 1 is a vertical cross-sectional view schematically showing the configuration of a refrigerator according to an embodiment of the present invention
- Figure 2 is a perspective view of a cold air duct according to an embodiment of the present invention
- Figure 3 is a flow path cover and sensor in the cold air duct An exploded perspective view showing the separated state.
- the refrigerator 1 may include an inner case 12 forming a storage compartment 11.
- the storage compartment 11 may include one or more of a refrigerating compartment and a refrigerating compartment.
- a cold air duct 20 is formed in the rear space of the storage compartment 11 to form a flow path through which cold air supplied to the storage compartment 11 flows.
- an evaporator 30 is disposed between the cold air duct 20 and the rear wall 13 of the inner case 12. That is, a heat exchange space 222 in which the evaporator 30 is disposed is defined between the cold air duct 20 and the rear wall 13.
- the air in the storage compartment 11 flows into the heat exchange space 222 between the cold air duct 20 and the rear wall 13 of the inner case 12 to exchange heat with the evaporator 30, and the cold air After flowing inside the duct 20, it is supplied to the storage chamber 11.
- the cold air duct 20 may include, but is not limited to, a first duct 210 and a second duct 220 coupled to a rear surface of the first duct 210.
- the front surface of the first duct 210 faces the storage chamber 11, and the rear surface of the first duct 220 faces the rear wall 13 of the inner case 12.
- a cold air passage 212 may be formed between the first duct 210 and the second duct 220 in a state in which the first duct 210 and the second duct 220 are coupled to each other.
- a cold air inlet hole 221 may be formed in the second duct 220, and a cold air discharge hole 211 may be formed in the first duct 210.
- the cold air passage 212 may be provided with a blowing fan (not shown). Therefore, when the blowing fan is rotated, air passing through the evaporator 13 flows into the cold air flow path 212 through the cold air inlet hole 221, and the storage chamber 11 through the cold air discharge hole 211. To be discharged.
- the evaporator 30 may be located between the cold air duct 20 and the rear wall 13, and the evaporator 30 may be located below the cold air inlet hole 221.
- the air of the storage chamber 11 is introduced into the cold air inlet hole 221 after the heat exchange with the evaporator 30 while rising.
- the defrosting necessary time of the evaporator 30 may be determined by using a parameter that changes according to the amount of implantation of the evaporator 30.
- the cold air duct 20 allows at least a part of the air for flowing through the heat exchange space 222 to be bypassed, and an idea of defrosting to determine a defrosting time point using a sensor whose output is different according to the flow rate of the air. It may further include.
- the implantation detecting means may include a bypass passage 230 for bypassing at least a portion of the heat exchange space 222 and a sensor 270 positioned on the bypass passage 230. .
- bypass flow path 230 may be formed to be recessed in the first duct 210.
- bypass flow path 230 may be provided in the second duct 220.
- the bypass flow path 230 may be formed as a portion of the first duct 210 or the second duct 220 is recessed in a direction away from the evaporator 30.
- the bypass flow path 230 may extend in the vertical direction from the cold air duct 20.
- the bypass flow path 230 may face the evaporator 30 within a left and right width range of the evaporator 30 so that the air in the heat exchange space 222 may be bypassed to the bypass flow path 230. Can be arranged.
- the implantation detecting means may further include a flow path cover 260 for allowing the bypass flow path 230 to be partitioned from the heat exchange space 222.
- the flow path cover 260 may be coupled to the cold air duct 20 and may cover at least a portion of the bypass flow path 230 extending upward and downward.
- the flow path cover 260 may include a cover plate 261, an upper extension part 262 extending from an upper side of the cover plate 261, and a barrier 263 provided below the cover plate 261. Can be. A detailed shape of the flow path cover 260 will be described later with reference to the drawings.
- FIG. 4 is a diagram showing air flow in a heat exchange space and a bypass flow path before and after implantation of an evaporator.
- FIG. 4 (a) shows the air flow before implantation
- FIG. 4 (b) shows the air flow after implantation.
- this embodiment for example, it is assumed that after the defrosting operation is completed, the state before the implantation.
- the flow rate (or flow rate) of air flowing through the bypass flow path 230 varies according to the amount of implantation of the evaporator 30.
- the sensor 270 the output value is changed according to the change in the flow rate of the air flowing through the bypass flow path 230, it can be determined whether or not defrosting based on the change in the output value.
- FIG. 5 is a view schematically showing a state in which a sensor is disposed in the bypass flow passage
- FIG. 6 is a view showing a sensor according to an embodiment of the present invention
- FIG. 7 is a flow rate of air flowing through the bypass flow passage.
- Figure is a view showing the heat flow around the sensor according.
- the senor 270 may be disposed at a point in the bypass flow path 230. Accordingly, the sensor 270 may be in contact with air flowing along the bypass flow path 230, and the output value may be changed in response to a change in the flow rate of air.
- the sensor 270 may be disposed at a position spaced apart from each of the inlet 231 and the outlet 232 of the bypass flow path 230. A detailed position of the sensor 270 in the bypass flow path 230 will be described later with reference to the drawings.
- the sensor 270 may face the evaporator 30 within a left and right width range of the evaporator 30.
- the sensor 270 may be, for example, a heating temperature sensor.
- the sensor 270 includes a sensor PC 272, a heating element 273 installed in the sensor PC 272, and a temperature of the heating element 273 installed in the sensor PC 272. It may include a sensing element 274 for sensing.
- the heat generating element 273 may be a resistor that generates heat when a current is applied.
- the sensing element 274 may sense the temperature of the heating element 273.
- the sensor PC 272 may have a temperature detected by the sensing element 274 in the off state of the heating element 273, and a temperature detected by the sensing element 274 in the on state of the heating element 273. You can judge the difference.
- the sensor PC 271 may determine whether a temperature difference value (eg, a maximum value) of an on / off state of the heating element 273 is equal to or less than a reference difference value.
- a temperature difference value eg, a maximum value
- the temperature detected by the sensing element 274 is lower than the temperature sensed by the sensing element 274 when the amount of implantation of the evaporator 30 is small.
- a difference between a temperature detected by the sensing element 274 while the heating element 273 is turned on and a temperature detected by the sensing element 274 when the heating element 273 is turned off If it is less than the reference temperature difference, it may be determined that defrost is necessary.
- the sensor 270 detects a change in the temperature of the heating element 273 that is varied by the air whose flow rate is variable according to the amount of implantation, and thus defrosting according to the amount of implantation of the evaporator 30. Accurately determine the time required.
- the sensor 270 is a sensor housing 271 such that air flowing through the bypass flow path 230 is prevented from directly contacting the sensor PC 272, the heating element 273, and the temperature sensor 274. It may further include.
- the wire connected to the sensor PCB 271 may be drawn out, and the opened portion may be covered by the cover part.
- the sensor housing 271 may surround the sensor PC 272, the heating element 273, and the temperature sensor 274.
- FIG. 8 is a diagram showing the position of the sensor on the bypass flow path
- FIG. 9 is a view showing the air flow pattern in the bypass flow path
- FIG. 10 is a view showing the flow of air in the state where the sensor is installed in the bypass flow path.
- the flow path cover 260 may cover a portion of the bypass flow path 230 in the vertical direction.
- the air flows along the region of the bypass passage 230 where the passage cover 260 exists (which is a region partitioned from the heat exchange space).
- the senor 270 may be spaced apart from the inlet 231 and the outlet 232 of the bypass flow path 230.
- the sensor 270 may be disposed at a location that is less affected by the flow change of air flowing through the bypass flow path 230.
- the senor 270 is located at least 6Dg (or 6 * diameter diameter) at an inlet of the bypass flow path 230 (actually, a lower end portion of the flow path cover 260) (hereinafter referred to as “inlet reference”). Location ").
- the senor 270 is at least 3Dg (or 3 * diameter diameter) spaced apart from the exit of the bypass flow path 230 (actually, the upper end of the flow path cover 260) (hereinafter referred to as “outlet reference position”). It can be arranged in).
- the sensor 270 when air flows along the bypass flow path 230, the sensor 270 is installed at a position where the flow change is small to reduce the detection error.
- the senor 270 may be located within a range between the inlet reference position and the outlet reference position. The sensor 270 may be located closer to the outlet reference position than to the inlet reference position. Thus, the sensor 270 may be located closer to the outlet 232 than the inlet 231 in the bypass flow path 230.
- the sensing accuracy of the sensor 270 can be improved.
- the air becomes a fully developed flow form as it moves away from the inlet 231 in the bypass flow path 230.
- the sensor 270 Since the sensor 270 is very sensitive to the change in the flow of air, when the sensor 270 is positioned at the center of the bypass flow path 230 at the point where the fully developed flow is formed, the air in the sensor 270 It is possible to accurately detect the change in flow.
- the senor 270 may be installed in the central region of the bypass flow path 230.
- the center area of the bypass flow path 230 is an area including a point that bisects the bottom wall 236 of the portion recessed in the bypass flow path 230 and the flow path cover 260. That is, a part of the sensor 270 may be located at a point bisecting the bottom wall 236 of the portion recessed in the bypass flow path 230 and the flow path cover 260.
- the sensor 270 may be spaced apart from the bottom wall 236 of the bypass flow path 230 and the flow path cover 260. Accordingly, some of the air in the bypass flow path 230 flows through the space between the bottom wall 236 and the sensor 270, and another part of the air flows between the sensor 270 and the flow path cover 260. It can flow.
- the senor 270 may be installed in the central region of the flow path at the point where the change of air flow is minimal in the bypass flow path 230 and at the point where the complete development flow flows, so that the detection accuracy may be improved.
- This arrangement allows the sensor 270 to respond sensitively to changes in the flow of air due to the high and low amount of implantation. That is, the amount of temperature change detected by the sensor 270 may be increased.
- the temperature sensing precision of the sensor 270 itself is related to price, even when the sensor 270 having a low precision and a relatively low price is used, it is possible to determine the defrosting necessary time.
- FIG. 11 is a view illustrating an arrangement of a bypass flow path and a flow path cover in a cold air duct according to an embodiment of the present invention.
- the lower end portion 260a of the flow passage cover 260 may be positioned at a height similar to the lower end of the evaporator 30 or lower than the lower end of the evaporator 30.
- the blowing fan since the blowing fan is located in the cold air duct 20, when the blowing fan is rotated, the air inlet hole 221 of the cold air duct 20 becomes a low pressure region.
- the lower side of the evaporator 30 is a high pressure region and the upper side of the evaporator 30 is a low pressure region based on the evaporator 30. .
- the upper end portion 260b of the flow path cover 260 may be located in the low pressure region.
- the upper end portion 260b of the flow path cover 260 may be located higher than the evaporator 30. Therefore, the air discharged from the bypass flow path 230 may be less affected by the air passing through the evaporator 30.
- the bypass flow path 230 may be disposed so as not to overlap the air flow hole 221 in the vertical direction. This is to prevent the air at the outlet 232 of the bypass flow path 230 from being affected by the air flowing into the air flow hole 221.
- the outlet 232 of the bypass flow path 230 may be located lower than the center C of the blowing fan. In addition, the outlet 232 of the bypass flow path 230 may be located lower than the lowest point of the air flow hole (221).
- the diameter of the air flow hole 221 is D1 and the diameter of the blowing fan is D2.
- the diameter D2 of the blowing fan may be larger than the diameter D1 of the air flow hole 221.
- a restricted area having a diameter D3 larger than the diameter D2 of the blower fan may be set based on the center C of the blower fan, and the outlet 232 of the bypass flow path 230 is the restricted area having a diameter D3. It may be located in the outer region of the.
- bypass flow path 230 may extend in a straight line shape in a vertical direction in an area outside the restriction area.
- the diameter D3 may be set to more than 1.5 times the diameter of the blowing fan.
- the flow velocity of air in the region having the diameter D3 is high due to the high flow velocity of the air flow hole 221.
- the bypass flow path 230 while reducing the length of the bypass flow path 230, the bypass flow path 230 in a straight form so that the flow rate around the air flow hole 221 is not affected by the fast air.
- the outlet 232 may be located outside of the restriction area.
- FIG. 12 is an enlarged view illustrating ribs for preventing a bypass flow path and defrost water inflow according to an embodiment of the present invention.
- the sensor 270 and the bypass flow path 230 are formed in the bypass flow path 230. In the flow path between the walls of the capillary phenomenon may occur.
- the senor 270 may be spaced apart from the bottom wall 236 of the bypass flow path 230 and the flow path cover 260 to prevent in-flow implantation.
- the senor 270 may be designed to be spaced apart from each of the bottom wall 236 and the flow path cover 260 by 1.5 mm or more (which may be referred to as a “minimum separation distance”).
- the depth D of the bypass flow path 230 may be equal to or greater than (2 * minimum separation distance) and the thickness of the sensor 270.
- the left and right widths W of the bypass flow path 230 may be larger than the depth D.
- the left and right widths W of the bypass flow path 230 are formed larger than the depth D, when the air flows through the bypass flow path 230, the contact area between the air and the sensor 270 is increased. As a result, the amount of change in temperature detected by the sensor 270 may be increased.
- the cold air duct 20 may be provided with a blocking rib 240 for preventing a liquid such as defrost water or moisture formed during the defrosting process from being introduced into the bypass flow path 230.
- the blocking rib 240 may be located above the outlet 232 of the bypass flow path 230.
- the blocking rib 240 may have a shape of a protrusion protruding from the cold air duct 20.
- the blocking rib 240 spreads the falling liquid to the left and right to prevent the inflow into the bypass flow path 230.
- the blocking rib 240 may be formed in a straight line shape from side to side, or may be formed in a rounded shape so as to be convex upward.
- the blocking ribs 240 may be disposed to overlap the entire left and right sides of the bypass flow path 230 in an up and down direction, and may be formed such that a minimum left and right lengths are larger than the left and right widths of the bypass flow path 230.
- the left and right minimum lengths of the blocking rib 240 are the bypass flow path 230. It may be set to less than twice the width (W) of the left and right.
- the length of the blocking rib 240 may be reduced.
- the defrost water flows over the blocking rib 240 and passes through the bypass flow path. There is a fear of entering into (230).
- the blocking rib 240 may be spaced apart from the bypass flow path 230 in the vertical direction, and the maximum separation distance may be set within a left and right width (W) range of the bypass flow path 230.
- the cold air duct 20 may further include a sensor installation groove 235 recessed to install the sensor 270.
- the cold air duct 20 includes a bottom wall 236 and both side walls 233 and 234 for forming the bypass flow path 230, and the sensor installation groove 235 includes both side walls 233, 234).
- the sensor 270 may be spaced apart from the bottom wall 236 and the flow channel cover 260 by a minimum separation distance as described above.
- FIG. 13 is a view illustrating a barrier of a flow path cover according to an exemplary embodiment of the present disclosure
- FIG. 14 is a diagram illustrating a change in temperature detected by a sensor according to a protruding length of the barrier
- FIG. 15 is along AA of FIG. 13. It is sectional drawing of the incision barrier.
- Figure 16 is a view showing a change in the flow of air with or without a slot in the barrier
- Figure 17 is a view showing the amount of change in temperature detected by the sensor according to the length of the slot formed in the barrier.
- FIG. 18 is a view showing the flow of air introduced into the heat exchange space of the present invention.
- the flow path cover 260 may include a cover plate 261, an upper extension 262, and a barrier 263.
- the cover plate 261 covers the bypass flow path 230 and may be formed in a thin plate shape.
- the cover plate 261 may cover the bypass flow path 230 in a state spaced apart from the bottom wall 236.
- a mounting groove 235a for mounting the cover plate 261 may be vertically long.
- the outer surface of the cover plate 261 may form a surface that is substantially continuous with the cold air duct 20.
- the upper extension part 262 may also cover a portion of the bypass flow path 230, and may extend inclined at a predetermined angle from the cover plate 261.
- the upper extension portion 262 is configured to be inclined to extend from the cover plate 261 correspondingly as a portion of the cold air duct 20 (hereinafter referred to as “upward inclined portion”) is inclined.
- the upper extension portion 262 may be omitted so that the cover plate 261 may be formed in a straight line shape.
- the upper extension 262 covers only a part of the bypass flow path 230. Thus, a portion of the bypass flow path 230 is exposed to the outside to become the outlet 232.
- a portion of the barrier 263 is positioned outside the bypass flow path 230 while the cover plate 261 covers the bypass flow path 230.
- the barrier 263 may protrude downward from the vertically extending surface 227 of the cold air duct 20.
- a part of the barrier 263 is located in the bypass flow path 230, and the other part protrudes downward from the bypass flow path 230.
- the barrier 263 may include a rear barrier 267 positioned close to the evaporator 30, a front barrier 264 spaced apart from the front of the rear barrier 267, and the front barrier ( 264 and a plurality of side barriers 265 and 266 connecting the rear barrier 267.
- the plurality of side barriers 265 and 266 may be spaced apart in the left and right directions. Although not limited, the plurality of side barriers 265 and 266 may be disposed in parallel.
- the back barrier 267 is a wall formed continuously with the cover plate 261.
- the plurality of side barriers 265 and 266 are walls extending forward from the back barrier 267.
- the front barrier 264 is a wall connecting front ends of the plurality of side barriers 265 and 266.
- the front barrier 264 is located opposite the evaporator 30 with respect to the rear barrier 267.
- a guide flow path 268 that guides air to the bypass flow path 230 is formed in the barrier 263 by the front barrier 264, the plurality of side barriers 265 and 266, and the rear barrier 267. Is formed.
- the guide passage 268 is a passage communicating with the bypass passage 230 outside the bypass passage 230.
- the guide flow path 268 also serves as a bypass flow path.
- the vertically extending surface 227 on which the bypass flow path 230 is formed may be a substantially vertical surface.
- the bypass passage 230 may extend in a straight line shape in the vertical direction on the vertical extension surface 227.
- the cold air duct 20 may further include an inclined surface 228 extending from a lower end of the upper and lower extending surfaces 227.
- the inclined surface 228 may extend downwardly as the distance from the evaporator 30 increases.
- the inclined surface 228 is a surface for guiding the air in the storage chamber 11 to the heat exchange space 222.
- the air in the storage compartment 11 may flow upwardly inclined by the inclined surface 228 when viewed from the side of the heat exchange space 222.
- the barrier 263 may serve to limit the inflow of air introduced into the heat exchange space 222 into the bypass flow path 230 when the amount of implantation of the evaporator 30 is small. have.
- the barrier 230 may serve to effectively guide the air introduced into the heat exchange space 222 to the bypass flow path 230 when the amount of implantation of the evaporator 30 is large.
- the detection accuracy of the sensor 270 may be improved by the barrier 263.
- the flow rate of the air is large according to a large amount or a small amount of the amount of implantation of the evaporator 30, the amount of change in temperature sensed by the sensor 270 is increased, so that the determination of the defrosting necessary time may be accurate.
- the lower end portion of the upper and lower extension surfaces 227 (the boundary between the upper and lower extension surfaces 227 and the inclined surface 228) is extended from the lower end portion 227 to the bypass flow path 230 along the protruding length of the barrier 263.
- the flow rate of the incoming air can vary.
- the horizontal axis shows the protruding length of the barrier
- the vertical axis shows the magnitude of the change amount between the temperature before implantation and the temperature after implantation.
- the temperature variation range of the sensor 270 eg, the difference between the highest temperature and the lowest temperature
- the bypass flow path Since the flow rate of air flowing through the 230 is large, the temperature change range of the sensor 270 is large.
- the amount of change of the temperature of the sensor 270 before implantation and the temperature of the sensor 270 after implantation is reduced.
- the protruding length of the barrier 263 becomes too long, the flow rate of air flowing into the bypass flow path 230 is reduced not only before the implantation but also after the implantation, and thus the temperature of the sensor 270 before the implantation is implanted. The change amount of the temperature of the sensor 270 afterwards becomes small.
- the protruding length of the barrier 230 may be set to a value of 10 mm or more and 17 mm or less so that the temperature change amount before and after implantation in the sensor 270 may be greater than or equal to the reference variation.
- the lower end of the barrier 263 may be arranged horizontally.
- the front barrier 264 and the plurality of side barriers 265 and 266 may be located on substantially the same horizontal plane.
- the air in the storage compartment 11 flows upwardly inclined along the inclined surface 228, so that the air passing the front barrier 264 among the inclined air flows through the rear barrier ( When hitting 267, air does not flow to the evaporator 30 and flows to the bypass flow path 230.
- the flow rate of the air flowing in the bypass flow path 230 must be minimum to increase the accuracy of the defrosting time determination.
- a slot 269 may be formed in the rear barrier 267 to provide a passage of air so that air passing through the lower end of the front barrier 264 may flow directly to the evaporator 30.
- the air that hits the front barrier 264 flows along the plurality of side barriers 265 and 266 and then flows toward the rear barrier 267.
- the flow rate of air actually flowing into the bypass flow path 230 includes at least a flow rate of air directly flowing into the guide flow path 268 of the barrier 263 and a circumference of the barrier 263. It may be determined by the flow rate of the air flowing into the barrier 263 along the slot 269 after flowing along.
- the flow rate of air flowing into the bypass flow path 230 is large, and the slot 269 is lengthened. The flow rate of air flowing into the bypass flow path 230 is reduced.
- the length of the slot 269 may be set to 4 mm or more and 9 mm or less so that the flow rate of air flowing into the bypass flow path 230 before implantation is minimized.
- the length of the slot 269 may be designed to be in the range of 1/5 to 1/2 of the protruding length of the barrier 263.
- FIG. 19 is a control block diagram of a refrigerator according to one embodiment of the present invention.
- the refrigerator 1 includes a defrosting means 50 that operates for defrosting the evaporator 30, and a controller 40 that controls the defrosting means 50. ) May be further included.
- the defrosting means 50 may include, for example, a heater. When the heater is turned on, heat generated by the heater is transferred to the evaporator 30 to melt frost generated on the surface of the evaporator 30.
- the controller 40 may control the heating element 273 of the sensor 270 to be turned on at a predetermined cycle.
- the heating element 273 may be in an on state for a predetermined time, and the sensing element 274 may sense a temperature of the heating element 273.
- the heating element 274 may be turned off, and the sensing element 274 may sense the temperature of the turned off heating element 273.
- the sensor PC 272 may determine whether the maximum value of the temperature difference value of the on / off state of the heat generating element 273 is equal to or less than the reference difference value.
- the defrosting means 50 is turned on by the controller 40. Can be.
- the sensor PC 272 determines whether the temperature difference value of the on / off state of the heating element 273 is equal to or less than a reference difference value.
- the control unit 40 determines that the heating element ( It may be determined whether the temperature difference value in the on / off state of 273 is equal to or less than the reference difference value, and the defrosting means 50 may be controlled according to the determination result.
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- Engineering & Computer Science (AREA)
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- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Defrosting Systems (AREA)
- Air-Conditioning For Vehicles (AREA)
- Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
- Measuring Volume Flow (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
Abstract
Description
Claims (20)
- 저장실을 형성하는 인너 케이스;상기 저장실 내에서 공기의 유동을 안내하며 상기 인너 케이스와 함께 열교환 공간을 형성하는 냉기 덕트;상기 인너 케이스와 상기 냉기 덕트 사이의 열교환 공간에 위치되는 증발기;상기 냉기 덕트에서 함몰된 형태로 배치되며, 공기가 상기 증발기를 바이패스하여 유동하도록 하는 바이패스 유로;상기 바이패스 유로 내에 배치되며, 상기 바이패스 유로를 유동하는 공기의 유량에 따라 출력 값이 다른 센서;상기 증발기의 표면에 생성된 성에를 제거하기 위한 제상 수단; 및상기 센서의 출력 값에 기초하여 상기 제상 수단을 제어하는 제어부를 포함하는 냉장고.
- 제 1 항에 있어서,상기 센서는, 발열 소자와,상기 발열 소자의 온도를 감지하는 감지 소자와,상기 발열 소자 및 상기 감지 소자가 설치되는 센서 피씨비를 포함하는 냉장고.
- 제 2 항에 있어서,상기 발열 소자가 온된 상태에서 상기 감지 소자에서 감지되는 온도와 상기 발열 소자가 오프된 상태에서 상기 감지 소자에서 감지되는 온도의 차이값이 기준 온도값 이하인 경우에, 상기 제어부는 상기 제상 수단을 작동시키는 냉장고.
- 제 2 항에 있어서,상기 센서는, 상기 발열 소자와, 감지 소자 및 상기 센서 피씨비를 둘러싸는 센서 하우징을 더 포함하는 냉장고.
- 제 1 항에 있어서,상기 바이패스 유로를 상기 열교환 공간과 구획하기 위하여 상기 바이패스 유로를 커버하는 유로 커버를 더 포함하는 냉장고.
- 제 5 항에 있어서,상기 냉기 덕트는, 상기 바이패스 유로가 형성되는 면인 상하 연장면을 포함하고,상기 유로 커버는, 상기 바이패스 유로를 커버하는 커버 플레이트와,상기 커버 플레이트에서 연장되며, 상기 커버 플레이트가 상기 바이패스 유로를 커버한 상태에서 상하 연장면에서 하방으로 돌출되는 배리어를 포함하는 냉장고.
- 제 6 항에 있어서,상기 상하 연장면에서 상기 바이패스 유로는 상하 방향으로 직선 형태로 연장되는 냉장고.
- 제 6 항에 있어서,상기 배리어는, 상기 커버 플레이트에서 연속적으로 연장되며 상기 증발기와 인접하게 위치되는 후면 배리어와,상기 후면 배리어에서 연장되며 좌우로 이격되는 복수의 측면 배리어와,상기 복수의 측면 배리어를 연결하며, 상기 후면 배리어와 이격되고 상기 후면 배리어를 기준으로 상기 증발기의 반대편에 위치되는 전면 배리어를 더 포함하는 냉장고.
- 제 8 항에 있어서,상기 배리어의 하면은 개구되며,상기 후면 배리어, 상기 복수의 측면 배리어 및 상기 후면 배리어는 공기를 상기 바이패스 유로로 안내하기 위한 안내 유로를 형성하는 냉장고.
- 제 8 항에 있어서,상기 냉기 덕트는, 상기 상하 연장면의 단부에서 경사지게 연장되며 공기를 상기 증발기 측으로 안내하는 경사면을 더 포함하고,상기 후면 배리어에는 상기 경사면을 따라 유동하는 공기가 상기 증발기 측으로 유동되도록 하기 위한 통로를 형성하는 슬롯이 구비되는 냉장고.
- 제 5 항에 있어서,상기 냉기 덕트는, 상기 바이패스 유로를 형성하기 위한 바닥벽 및 양측벽을 포함하고,상기 유로 커버는 상기 바닥벽과 이격된 상태에서 상기 바이패스 유로를 커버하는 커버 플레이트를 포함하고,상기 센서는, 상기 바이패스 유로에서 상기 바닥벽 및 상기 커버 플레이트와 이격되도록 배치되는 냉장고.
- 제 11 항에 있어서,상기 센서는, 상기 바이패스 유로의 입구 및 출구와 이격되도록 배치되며,상기 센서의 일부는 바이패스 유로에서 상기 바닥벽과 상기 커버 플레이트 간의 거리를 이등분하는 지점에 위치되는 냉장고.
- 제 12 항에 있어서,상기 센서는 상기 바이패스 유로의 입구 보다 출구에 가깝게 위치되는 냉장고.
- 제 5 항에 있어서,상기 바이패스 유로 및 상기 유로 커버의 적어도 일부는 상기 증발기의 좌우 폭 범위 내에서 상기 증발기와 마주보도록 배치되는 냉장고.
- 제 5 항에 있어서,상기 냉기 덕트의 내부에는 송풍팬이 배치되고,상기 냉기 덕트에는 냉기가 유입되기 위한 냉기 유입홀이 형성되며,상기 바이패스 유로는 상기 냉기 유입홀과 상하 방향으로 미중첩되도록 배치되는 냉장고.
- 제 15 항에 있어서,상기 바이패스 유로의 출구는 상기 송풍팬의 중심을 기준으로 상기 송풍팬 보다 큰 직경을 가지는 제한 영역의 외측 영역에 위치되는 냉장고.
- 제 16 항에 있어서,상기 바이패스 유로의 출구는 상기 증발기의 상단 보다 높게 위치되는 냉장고.
- 제 16 항에 있어서,상기 제한 영역의 직경은, 상기 송풍팬의 직경의 1.5배 이상인 냉장고.
- 제 1 항에 있어서,상기 냉기 덕트에서 상기 바이패스 유로의 상방에는 상기 바이패스 유로로 액체가 유입되는 것을 차단하기 위한 차단 리브가 형성되는 냉장고.
- 제 19 항에 있어서,상기 차단 리브의 좌우 최소 길이는 상기 바이패스 유로의 좌우 최소 폭 보다 크게 형성되며,상기 바이패스 유로의 좌우 전체는 상기 차단 리브와 상하 방향으로 중첩되도록 배치되는 냉장고.
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2018409749A AU2018409749B2 (en) | 2018-02-23 | 2018-10-25 | Refrigerator |
EP18906880.2A EP3757487A4 (en) | 2018-02-23 | 2018-10-25 | FRIDGE |
CN201880088953.4A CN111771092B (zh) | 2018-02-23 | 2018-10-25 | 冰箱 |
CN202210300871.XA CN114674108B (zh) | 2018-02-23 | 2018-10-25 | 冰箱 |
US16/991,479 US20200370815A1 (en) | 2018-02-23 | 2020-08-12 | Refrigerator |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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KR10-2018-0021938 | 2018-02-23 | ||
KR1020180021938A KR102627972B1 (ko) | 2018-02-23 | 2018-02-23 | 냉장고 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US16/991,479 Continuation US20200370815A1 (en) | 2018-02-23 | 2020-08-12 | Refrigerator |
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WO2019164084A1 true WO2019164084A1 (ko) | 2019-08-29 |
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PCT/KR2018/012711 WO2019164084A1 (ko) | 2018-02-23 | 2018-10-25 | 냉장고 |
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US (1) | US20200370815A1 (ko) |
EP (1) | EP3757487A4 (ko) |
KR (1) | KR102627972B1 (ko) |
CN (2) | CN114674108B (ko) |
AU (1) | AU2018409749B2 (ko) |
WO (1) | WO2019164084A1 (ko) |
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US20230288123A1 (en) | 2020-08-06 | 2023-09-14 | Lg Electronics Inc. | Refrigerator |
KR20220018176A (ko) | 2020-08-06 | 2022-02-15 | 엘지전자 주식회사 | 냉장고 |
KR20220018177A (ko) | 2020-08-06 | 2022-02-15 | 엘지전자 주식회사 | 냉장고 |
KR20220018175A (ko) | 2020-08-06 | 2022-02-15 | 엘지전자 주식회사 | 냉장고 |
KR20220018181A (ko) | 2020-08-06 | 2022-02-15 | 엘지전자 주식회사 | 냉장고 |
KR20220018180A (ko) | 2020-08-06 | 2022-02-15 | 엘지전자 주식회사 | 냉장고 |
KR20220018179A (ko) | 2020-08-06 | 2022-02-15 | 엘지전자 주식회사 | 냉장고 |
KR20220018182A (ko) | 2020-08-06 | 2022-02-15 | 엘지전자 주식회사 | 냉장고 |
KR20230000232A (ko) * | 2021-06-24 | 2023-01-02 | 엘지전자 주식회사 | 냉장고 |
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CN105865128B (zh) * | 2016-04-20 | 2018-08-28 | 合肥华凌股份有限公司 | 一种冰箱送风系统、方法及冰箱 |
-
2018
- 2018-02-23 KR KR1020180021938A patent/KR102627972B1/ko active IP Right Grant
- 2018-10-25 EP EP18906880.2A patent/EP3757487A4/en active Pending
- 2018-10-25 WO PCT/KR2018/012711 patent/WO2019164084A1/ko unknown
- 2018-10-25 AU AU2018409749A patent/AU2018409749B2/en active Active
- 2018-10-25 CN CN202210300871.XA patent/CN114674108B/zh active Active
- 2018-10-25 CN CN201880088953.4A patent/CN111771092B/zh active Active
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2020
- 2020-08-12 US US16/991,479 patent/US20200370815A1/en not_active Abandoned
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN112066623A (zh) * | 2020-08-27 | 2020-12-11 | 西安交通大学 | 一种风冷冰箱变加热功率除霜装置与控制方法 |
Also Published As
Publication number | Publication date |
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EP3757487A1 (en) | 2020-12-30 |
CN114674108A (zh) | 2022-06-28 |
AU2018409749A1 (en) | 2020-09-10 |
CN114674108B (zh) | 2023-12-15 |
EP3757487A4 (en) | 2021-11-10 |
CN111771092A (zh) | 2020-10-13 |
KR102627972B1 (ko) | 2024-01-23 |
KR20190101669A (ko) | 2019-09-02 |
US20200370815A1 (en) | 2020-11-26 |
CN111771092B (zh) | 2022-04-15 |
AU2018409749B2 (en) | 2022-07-28 |
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