WO2017069386A1 - 제상 장치 및 이를 구비하는 냉장고 - Google Patents
제상 장치 및 이를 구비하는 냉장고 Download PDFInfo
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- WO2017069386A1 WO2017069386A1 PCT/KR2016/008436 KR2016008436W WO2017069386A1 WO 2017069386 A1 WO2017069386 A1 WO 2017069386A1 KR 2016008436 W KR2016008436 W KR 2016008436W WO 2017069386 A1 WO2017069386 A1 WO 2017069386A1
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- heater
- case
- heater case
- heat
- heating unit
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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
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B39/00—Evaporators; Condensers
- F25B39/02—Evaporators
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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
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
- F25B47/02—Defrosting cycles
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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
- F25D21/12—Removing frost by hot-fluid circulating system separate from the refrigerant system
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
- F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
- F28D15/0208—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes using moving tubes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
- F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
- F28D15/0266—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes with separate evaporating and condensing chambers connected by at least one conduit; Loop-type heat pipes; with multiple or common evaporating or condensing chambers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/0008—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one medium being in heat conductive contact with the conduits for the other medium
- F28D7/0016—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one medium being in heat conductive contact with the conduits for the other medium the conduits for one medium or the conduits for both media being bent
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
- F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
- F28F1/40—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only inside the tubular element
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
- F28F19/006—Preventing deposits of ice
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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
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/01—Heaters
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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
- F25D21/04—Preventing the formation of frost or condensate
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
- F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
- F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
- F28D1/047—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being bent, e.g. in a serpentine or zig-zag
- F28D1/0477—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being bent, e.g. in a serpentine or zig-zag the conduits being bent in a serpentine or zig-zag
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
- F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
- F28D2015/0216—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes having particular orientation, e.g. slanted, or being orientation-independent
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
- F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
- F28F1/24—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely
Definitions
- the present invention relates to a defrosting apparatus for removing frost on the evaporator provided in the refrigeration cycle, and a refrigerator having the same.
- the evaporator provided in the refrigerating cycle lowers the ambient temperature by using cold air generated by circulation of the refrigerant flowing through the cooling tube. In this process, when a temperature difference with the ambient air occurs, a phenomenon occurs in which water in the air is condensed and frozen on the surface of the cooling tube.
- a defrosting operation for removing frost formed on an evaporator As a defrosting operation for removing frost formed on an evaporator, a defrosting method using an electric heater is conventionally used.
- the heat pipe type defrosting apparatus of the "evaporator" patent has a configuration in which the heater is vertically disposed along the up and down direction of the evaporator, and the working liquid is filled only at the bottom of the heater.
- the defrosting apparatus of the said structure can raise evaporation rate by rapid heating, there exists a danger of overheating of a heater.
- the heater has a structure accommodated inside the heat pipe, high temperature heat may be concentrated in the heat pipe, thereby shortening the life of the heater and causing a sealing problem of the heater.
- An object of the present invention is to provide a defrosting device of a new structure that can be manufactured at a lower cost, the power consumed during defrosting can be reduced, and the maintenance is easy.
- Another object of the present invention is to provide a defrosting device that can improve the heat transfer performance of the heater and can improve the reliability by preventing overheating of the heater.
- Another object of the present invention is to provide a defrosting device that can prevent the operating liquid from contacting the heater.
- Still another object of the present invention is to provide a structure in which a heating unit is vertically disposed along a vertical direction of an evaporator, and in which a defrost of a lower cooling tube of the evaporator can be smoothly performed.
- the defrosting apparatus of the present invention the heating unit provided in the evaporator; And at least a portion of which is connected to the inlet and the outlet of the heating unit, respectively, and at least a portion of which is disposed adjacent to the cooling tube so as to radiate heat to the cooling tube of the evaporator by a high temperature working liquid that is heated and conveyed by the heating unit.
- the heating unit comprises a heater case having an empty space therein and each having the inlet and the outlet at positions spaced apart from each other along a longitudinal direction; And a heater attached to an outer surface of the heater case and configured to heat the working liquid in the heater case.
- the heater may be a plate heater having a plate shape.
- the heater may include a base plate formed of a ceramic material and attached to an outer surface of the heater case; A heating wire formed on the base plate and configured to generate heat when power is applied; And a terminal provided in the base plate and configured to electrically connect the heating wire and the power.
- the heater case is divided into an active heating unit corresponding to a portion where the heating wire is disposed, and a passive heating unit corresponding to a portion where the heating wire is not disposed, and the working liquid returned through the inlet after moving the heat pipe.
- the inlet is formed in the passive heating section to prevent this reheating and backflow.
- the heating wire extends from one point between the inlet and the outlet toward the outlet.
- the present invention discloses a first to fourth embodiments of the defrosting device based on the above structure.
- the heater may be attached to the bottom of the heater case.
- Both sides of the heater case may be provided with first and second extension pins extending downward from the bottom surface to cover both side surfaces of the heater attached to the bottom surface, respectively.
- a sealing member is filled in the recessed space formed by the back of the heater and the recessed space formed by the first and second extension fins to cover the heater.
- An insulating material is interposed between the rear surface of the heater and the sealing member.
- a thermal conductive adhesive is interposed between the heater case and the heater.
- the heater case may include a main case having an empty space therein and having an open shape at both ends thereof and having the heater attached to a bottom surface thereof; And a first cover and a second cover which are mounted to cover the open ends of the main case, respectively.
- At least one of the first and second covers may extend downward from a bottom surface of the main case to surround the heater together with the first and second extension pins.
- the outlet is connected to one ends of the first and second heat pipes, respectively.
- a first outlet and a second outlet wherein the inlet includes a first inlet and a second inlet connected to the other ends of the first and second heat pipes, respectively.
- the first and second outlets may be formed at both sides of the main case, or may be formed in parallel with each other on the first cover.
- the first and second inlets may be formed at both sides of the main case, or may be formed in parallel with each other on the second cover.
- the outer fin may be formed on the other outer surface of the heater case is not attached to the heater protruding.
- the heater may be attached to the bottom surface of the heater case, and the outer fin may be formed on the top surface of the heater case.
- the outer fin may be provided in plural, and may be formed to extend along the longitudinal direction or the width direction of the heater case at predetermined intervals from each other.
- the separation interval is set equal to the width of the outer pin or wider than the width of the outer pin.
- the outer fin may be provided in plural, and may be arranged at predetermined intervals along the length direction and the width direction of the heater case to form a matrix.
- the first and second outlets are formed on both sides adjacent to one end of the main case, respectively, and the first and second inlets are respectively formed on both sides adjacent to the other end of the main case. Protrudingly formed on both outer surfaces of the main case, respectively, and may be formed to extend between the first inlet and the first outlet and between the second inlet and the second outlet.
- the outer pin may protrude from an outer surface of at least one of the first and second covers.
- the inner fin may be formed on the inner inner surface of the outer surface to which the heater is attached.
- the heater may be attached to an outer bottom surface of the heater case, and the inner fin may protrude from an inner bottom surface of the heater case.
- the inner fin is formed to protrude to a length less than 1/2 of the inner height of the heater case.
- the inner fin may be provided in plural, and may be formed to extend along the longitudinal direction of the heater case at predetermined intervals from each other.
- An interval between the inner wall of the heater case and the inner fin adjacent to the inner wall is formed to be one or more times two times or less than the width of the inner fin.
- a spacing interval between the plurality of inner pins is formed to be one or more times two times or less than a width of the inner pins.
- the first and second outlets are formed on both sides adjacent to one end of the main case, respectively, and the first and second inlets are respectively formed on both sides adjacent to the other end of the main case. It may be formed to extend between the first inlet and the first outlet and between the second inlet and the second outlet.
- the lead wire is configured to extend outwardly from one end of the heater adjacent to the outside of the evaporator.
- the lead wire is configured to extend outward from the left end of the heater adjacent to the left side of the evaporator.
- the terminal connected to the lead wire is located at the left end of the heater.
- the lead wire is configured to extend outward from the right end of the heater adjacent to the right side of the evaporator.
- a right end of the heater is disposed between the inlet and the outlet of the heater case, and the terminal connected to the lead wire is located between the inlet and the outlet adjacent to the inlet of the heater case.
- the outlet may be formed at a position spaced apart from the front end of the heater case at a predetermined interval so that a part of the working fluid stays at the front end of the heater case and contacts the heater.
- the inner diameter of the return portion of the heat pipe connected to the inlet of the heater case may be formed larger than 5mm and smaller than 7mm.
- the heater case is disposed such that the inlet end has an angle range of -90 ° to 2 ° with respect to the outlet end.
- the return portion may be disposed in parallel with the heater case or extend below the heater case, and is connected to the outlet of the heater case
- the inlet of the heat pipe may be disposed in parallel with the heater case or extend upward from the heater case.
- the heater case is disposed vertically along the up and down direction on the outside of the support provided on one side of the evaporator, the heater is located lower than the surface of the working fluid filled in the heater case when the working fluid is all liquid state It is composed.
- the heater may be attached to a surface opposite to one surface of the heater case facing the support.
- the heat pipes are repeatedly bent in a zigzag form to form a plurality of rows, and the spacing between the rows arranged at the bottom of the heat pipe is narrower than the spacing between the rows arranged at the top.
- the spacing between the rows arranged in the lower part of the first heat pipe in front of the evaporator is formed to be narrower than the spacing of the rows arranged in the upper part, and the spacing between the rows arranged in the upper part of the second heat pipe behind the evaporator is It may be formed narrower than the interval of each column disposed in the lower portion.
- the spacing between the rows arranged under the first heat pipe in front of the evaporator is wider than the spacing between the rows arranged above, and between the rows arranged above the second heat pipe behind the evaporator.
- the gap may be wider than the gap of each column disposed below.
- the heat pipe is connected to the outlet of the heating unit, the evaporator is disposed to correspond to the cooling tube to transfer heat to the cooling tube; And a condensation unit extending from the evaporation unit and disposed below the lowest row of the cooling tube and connected to the inlet of the heating unit.
- the lower end of the heating unit may be disposed adjacent to the lowest heat cooling tube.
- At least a portion of the heating unit may be disposed below the lowest heat cooling tube.
- the heater is attached to the outer surface of the heater case is configured to heat the working fluid in the heater case, it is easy to maintain and maintain the heater in the event of failure of the heater compared to the structure in which the heater is accommodated inside the heater case.
- a plate-shaped ceramic heater is applied as the heater, it is possible to implement a high efficiency defrosting device at a lower cost.
- the outer fin when the outer fin is formed on the outer surface of the heater case, the outer area of the heater case is increased, thereby improving heat exchange efficiency between the surrounding cold air and the heater case.
- the defrosting apparatus when the internal fin is formed in the heater case, the contact area with the working fluid filled in the heater case is increased, and the amount of heat transfer transferred from the heater to the working fluid may be increased. In addition, the total volume of the heater case is increased, so that the heat capacity that can receive heat in the heater case is increased, thereby receiving more heat generated by the heater. As a result, the defrosting performance can be improved.
- a heater is attached to the bottom of the heater case, and first and second extension pins are formed extending from the bottom to the bottom of the heater case, respectively, on both sides of the heater case.
- the return portion connected to the inlet of the heating unit may have an inner diameter larger than 5mm and smaller than 7mm. In this case, the returned working fluid may be smoothly introduced into the heater case, and backflow of the reheated working fluid may be prevented.
- connection structure between the heating unit and the heat pipe which the working fluid is easy to flow, it is reheated by the heater and prevents the backflow of the reheated working fluid to increase the lifting force in the gas state.
- a structure that can smoothly form the flow of the working fluid discharged with it can be implemented.
- the defrosting apparatus in which the heating unit is disposed vertically along the up and down direction of the evaporator, when the low temperature condensation portion of the heat pipe is disposed at least two rows below the lowest heat of the evaporator, only the high temperature evaporation portion is provided. Since the defrost of the evaporator is used, the defrosting on the lower cooling pipe can be performed smoothly.
- At least a part of the heating unit may be disposed below the evaporator, and preferably, the lower end of the heating unit may be positioned adjacent to the lowest row horizontal pipe of the heating unit. In this case, the filling amount of the working liquid may be reduced, and thus the temperature of the lowest heat horizontal pipe of the heat pipe may be raised to a level capable of defrosting.
- FIG. 1 is a longitudinal sectional view schematically showing the configuration of a refrigerator according to one embodiment of the present invention
- FIG. 2 and 3 are a front view and a perspective view showing a first embodiment of a defrost apparatus applied to the refrigerator of FIG.
- FIG. 4 is an exploded perspective view showing an example of the heating unit shown in FIG.
- FIG. 5 is a cross-sectional view taken along the longitudinal direction of the heating unit shown in FIG.
- FIG. 6 is a conceptual diagram of the heater shown in FIG.
- FIG. 7 to 9 are exploded perspective views showing examples in which the positions where the outlet and the inlet are formed in the heating unit shown in FIG. 4 are modified.
- 10 and 11 are conceptual views for explaining the circulation of the working liquid in the state before and after the operation of the heater.
- FIG. 12 is a cross-sectional view of another example of the heating unit illustrated in FIG. 3 taken along a width direction;
- FIG. 13 and 14 are conceptual views showing examples in which the shape of the outer fins is deformed in the heating unit illustrated in FIG. 12.
- 15 and 16 are cross-sectional views taken along the width direction and the length direction of another example of the heating unit shown in FIG. 3.
- 17 is a cross-sectional view showing an example in which the formation position of the inner fin is modified in the heating unit shown in FIG.
- FIG. 18 is a cross-sectional view illustrating another example of the heating unit illustrated in FIG. 3.
- 19 and 20 are conceptual diagrams for explaining the connection structure of the lead wire according to the position of the heating unit.
- 21A to 21C are graphs showing a change in temperature of the heater according to the inner diameter of the return unit shown in FIG. 4 in a freezing condition.
- FIG. 22 conceptually illustrates the flow of fluid in the return portion of FIG. 21C condition
- 23 is a graph showing the temperature change of each row of the heater case and the heat pipe according to the angle in which the inlet end of the heater case is inclined with respect to the outlet end.
- 24 to 26 are longitudinal cross-sectional views illustrating a modification of the connection structure between the heating unit and the heat pipe in the heating unit applied to FIGS. 19 to 20.
- 27 and 28 are a front view and a perspective view showing a second embodiment of the defrost apparatus applied to the refrigerator of FIG.
- FIG. 29 is a conceptual view illustrating a third embodiment in which a width between an upper row and a lower row of a heat pipe is different in a defrosting apparatus applied to the refrigerator of FIG. 1.
- FIG. 30 and 31 are conceptual views illustrating a modification of the defrosting apparatus shown in FIG. 29.
- 32 and 33 are a front view and a perspective view showing a fourth embodiment of a defrost apparatus applied to the refrigerator of FIG.
- 34 and 35 are front and perspective views showing an example in which the formation position of the heating unit is modified in the defrosting apparatus shown in FIGS. 32 and 33.
- FIG. 1 is a longitudinal sectional view schematically showing a configuration of a refrigerator 100 according to an embodiment of the present invention.
- the refrigerator 100 is a device for low temperature storage of food stored therein by using cold air generated by a refrigeration cycle in which compression, condensation, expansion, and evaporation processes are continuously performed.
- the refrigerator body 110 has a storage space for storing food therein.
- the storage space may be separated by the partition wall 111 and may be divided into a refrigerating chamber 112 and a freezing chamber 113 according to a set temperature.
- the freezer compartment 113 shows a top mount type refrigerator in which the freezer compartment 113 is disposed, but the present invention is not limited thereto.
- the present invention is also applied to a side by side type refrigerator in which the refrigerating compartment and the freezing compartment are arranged left and right, a bottom freezer type refrigerator in which a refrigerating compartment is provided at an upper portion and a freezing compartment at a lower portion thereof. Can be.
- a door is connected to the refrigerator main body 110 to open and close the front opening of the refrigerator main body 110.
- the refrigerator compartment door 114 and the freezer compartment door 115 are configured to open and close front portions of the refrigerator compartment 112 and the freezer compartment 113, respectively.
- the door may be variously configured as a rotatable door rotatably connected to the refrigerator main body 110, a drawer-type door connected to the refrigerator main body 110 to be slidably movable.
- the refrigerator main body 110 includes at least one storage unit 180 (eg, a shelf 181, a tray 182, a basket 183, etc.) for efficient utilization of the internal storage space.
- the shelf 181 and the tray 182 may be installed inside the refrigerator body 110
- the basket 183 may be installed inside the door 114 connected to the refrigerator body 110.
- the cooling chamber 116 is provided on the rear side of the freezing chamber 113, the evaporator 130 and the blowing fan 140.
- the partition 111 is provided with a refrigerating compartment return duct 111a and a freezing compartment return duct 111b for allowing the air in the refrigerating compartment 112 and the freezing compartment 113 to be sucked and returned to the cooling compartment 116.
- a cold air duct 150 is provided at the rear side of the refrigerating chamber 112 and communicates with the freezing chamber 113 and has a plurality of cold air discharging outlets 150a at the front side thereof.
- a machine room 117 is provided at the lower rear side of the refrigerator main body 110, and a compressor 160, a condenser (not shown), and the like are provided inside the machine room 117.
- the air in the refrigerating chamber 112 and the freezing chamber 113 is cooled by the blowing fan 140 of the cooling chamber 116 through the refrigerating chamber return duct 111a and the freezing chamber return duct 111b of the partition wall 111.
- 116 is sucked into the evaporator 130 and heat exchanged with the evaporator 130, and is repeatedly discharged to the refrigerating chamber 112 and the freezing chamber 113 through the cold air outlet 150a of the cold air duct 150.
- frost is implanted on the surface of the evaporator 130 by the temperature difference between the recirculated air re-introduced through the refrigerating compartment return duct 111a and the freezing compartment return duct 111b.
- the defrosting device 170 In order to remove the frost evaporator 130 is provided with a defrosting device 170, the water removed by the defrosting device 170, that is, the defrost water is the lower portion of the refrigerator main body 110 through the defrost water discharge pipe 118 It will be collected in the side water receiver (not shown).
- FIG. 2 and 3 are a front view and a perspective view showing a first embodiment of the defrosting device 170 applied to the refrigerator 100 of FIG.
- the evaporator 130 includes a cooling tube 131 (cooling pipe), a plurality of cooling fins 132, and supports 133 on both sides.
- the cooling tube 131 is repeatedly bent in a zigzag form to form a plurality of rows, and a refrigerant is filled therein.
- the cooling tube 131 may be formed of aluminum.
- the cooling pipe 131 may be configured by a combination of the horizontal pipe part and the bending pipe part.
- the horizontal pipes are arranged horizontally with each other up and down to form a row, and the horizontal pipes of each row are configured to pass through the cooling fins 132.
- the bending pipe part is configured to connect the ends of the upper horizontal pipe part and the end of the lower horizontal pipe part, respectively, to communicate with each other.
- the cooling tube 131 is supported through the support 133 provided on both sides of the evaporator 130. At this time, the bending pipe portion of the cooling pipe 131 is configured to connect the end of the upper horizontal pipe portion and the end of the lower horizontal pipe portion from the outside of the support 133.
- the first cooling tube 131 ′ and the second cooling tube 131 ′′ formed at the front and rear portions of the evaporator 130 so that the cooling tubes 131 form two rows, respectively.
- the front first cooling tube 131 ′ and the rear second cooling tube 131 ′′ are formed in the same shape, and thus the second cooling tube 131 ′′ is formed. It is covered by the first cooling tube 131 '.
- the present invention is not limited thereto.
- the first cooling tube 131 ′ at the front and the second cooling tube 131 ′′ at the rear may be formed in different shapes.
- the cooling tube 131 may be formed to form a single row. .
- a plurality of cooling fins 132 are spaced apart from each other at predetermined intervals along the extending direction of the cooling tube 131.
- the cooling fin 132 may be formed of a flat plate made of aluminum, and the cooling pipe 131 may be expanded in the state of being inserted into the insertion hole of the cooling fin 132 and may be firmly fitted into the insertion hole.
- a plurality of support 133 is provided on both sides of the evaporator 130, each is configured to support the cooling pipe 131 extending vertically along the vertical direction.
- the support 133 is formed with an insertion groove or an insertion hole into which the heat pipe 172, which will be described later, is inserted and fixed.
- the defrosting device 170 is installed in the evaporator 130 to remove frost generated in the evaporator 130.
- the defrosting device 170 includes a heating unit 171 and a heat pipe 172 (heat transfer pipe).
- the heating unit 171 is provided below the evaporator 130 and is electrically connected to a controller (not shown) and is configured to generate heat when receiving a driving signal from the controller. For example, the control unit applies a driving signal to the heating unit 171 at predetermined time intervals, or when the detected temperature of the cooling chamber 116 is lowered below a predetermined temperature, the control unit sends a driving signal to the heating unit 171. It may be configured to apply.
- the heat pipe 172 is connected to the heating unit 171 to form a closed loop flow path through which the working fluid F can circulate with the heating unit 171.
- the heat pipe 172 may be formed of aluminum.
- the heat pipe 172 may be composed of a first heat pipe 172 'and a second heat pipe 172 "disposed in two rows at the front part and the rear part of the evaporator 130.
- the first heat pipe 172 ' is disposed in front of the first cooling tube 131'
- the second heat pipe 172 " is disposed behind the second cooling tube 131", so as to form two rows.
- the formed structure is shown.
- the refrigerant As the working liquid (F), the refrigerant is present in the liquid phase under the refrigeration conditions of the refrigerator 100, and when heated, the refrigerant (for example, R-134a, R-600a, etc.) to change the phase to the gas phase to transport heat ) May be used.
- the refrigerant for example, R-134a, R-600a, etc.
- FIG. 4 is an exploded perspective view illustrating an example of the heating unit 171 illustrated in FIG. 3, and FIG. 5 is a cross-sectional view of the heating unit 171 illustrated in FIG. 4 along a length direction, and FIG. 6 is illustrated in FIG. 4. It is a conceptual diagram of the heater 171b shown.
- the heating unit 171 will be described in detail with reference to the drawings.
- the heating unit 171 includes a heater case 171a and a heater 171b.
- the heater case 171a has a hollow shape and is connected to both ends of the heat pipe 172 to form a closed loop flow path through which the working liquid F can circulate with the heat pipe 172.
- the heater case 171a may have a square pillar shape and may be formed of aluminum.
- the heater case 171a may be disposed at one side of the evaporator 130 where the accumulator 134 is located, the other side opposite thereto, or any point between the one side and the other side.
- the heater case 171a may be disposed adjacent to the lowest row of the cooling tube 131.
- the heater case 171a may be disposed at the same height as the lowest row of the cooling tube 131 or at a position lower than the lowest row of the cooling tube 131.
- the heater case 171a is located at a position lower than the lowest heat of the cooling tube 131 at one side of the evaporator 130 where the accumulator 134 is located, in parallel with the cooling tube 131. ) Is placed in the horizontal direction.
- Outlets 171c 'and 171c "and inlets 171d' and 171d" respectively connected to both ends of the heat pipe 172 are formed at both sides in the longitudinal direction of the heater case 171a.
- outlets 171c 'and 171c communicate with one end of the heat pipe 172 are formed at one side of the heater case 171a (for example, an outer circumferential surface adjacent to the front end of the heater case 171a).
- the outlets 171c 'and 171c mean openings through which the heating hydraulic fluid F is discharged to the heat pipe 172 by the heater 171b.
- inlets 171d 'and 171d "communicating with the other end of the heat pipe 172 are formed.
- 171d 'and 171d ′′ mean an opening through which the working liquid F condensed while passing through the heat pipe 172 is recovered to the heater case 171a.
- the heater 171b is attached to an outer surface of the heater case 171a and configured to generate heat when receiving a driving signal from the controller.
- the working fluid F in the heater case 171a receives heat by the heater 171b that generates heat and is heated to a high temperature.
- the heater 171b extends along one direction and is attached to an outer surface of the heater case 171a to have a shape extending along the longitudinal direction of the heater case 171a.
- a plate-shaped heater for example, a plate-shaped ceramic heater having a plate shape is used.
- the heater case 171a is formed in the shape of a square pipe having an empty space therein in the form of a square cross section, and the plate-shaped heater 171b is attached to the bottom surface of the heater case 171a.
- the structure in which the heater 171b is attached to the bottom surface of the heater case 171a is advantageous in generating propulsion force to the upper side in the heated working fluid F, and the defrosting water generated by the defrost The short can be prevented by not falling directly on 171b).
- a heater wire 171b2 (see FIG. 6) is formed in the heater 171b and is configured to generate heat when power is supplied. As shown in FIG. 5, the heater case 171a has passive heating corresponding to an active heating part (AHP) corresponding to a portion where the heating wire 171b2 is disposed and a portion where the heating wire 171b2 is not arranged. It is divided into a passive heating part (PHP). The active heating unit (AHP) and the passive heating unit (PHP) will be described later.
- the heat pipe 172 and the heater case 171a may be formed of the same material (for example, aluminum), and in this case, the heat pipe 172 is an outlet 171c ', 171c "of the heater case 171a. And inlets 171d 'and 171d ".
- the heater 171b is configured of a cartridge type and mounted inside the heater case 171a, for welding and sealing between the heater 171b and the heater case 171a, a copper material other than aluminum is used.
- the heater case 171a is used.
- the heat pipe 172 and the heater case 171a are formed of different materials (as in the above case, the heat pipe 172 is formed of an aluminum material and the heater case 171a is formed of a copper material).
- Case it is difficult to directly connect the heat pipe 172 to the outlets 171c ', 171c "and the inlets 171d', 171d” of the heater case 171a. Therefore, in order to connect them, the outlet pipes are formed at the outlets 171c 'and 171c "of the heater case 171a, and the recovery pipes are formed to be extended at the inlets 171d' and 171d", thereby providing a heat pipe 172.
- this process Is connected to the outlet pipe and the recovery pipe, this process requires a welding and sealing process.
- the heater case 171a may be formed of the same material as the heat pipe 172, the heat pipe 172 May be directly connected to the outlets 171c 'and 171c "and the inlets 171d' and 171d" of the heater case 171a.
- the working fluid F filled inside the heater case 171a by the heater 171b is heated to a high temperature
- the working fluid F flows due to the pressure difference to move the heat pipe 172. do.
- the high temperature working liquid F heated by the heater 171b and discharged to the outlets 171c 'and 171c ′′ heats the cooling pipe 131 of the evaporator 130 while moving the heat pipe 172.
- the working fluid F is gradually cooled through this heat exchange process and flows into the inlets 171d 'and 171d ′′.
- the cooled working fluid F is reheated by the heater 171b and then discharged to the outlets 171c 'and 171c "to repeat the above process.
- the defrosting of the cooling pipe 131 is performed by this circulation method. This is done.
- At least a part of the heat pipe 172 is disposed adjacent to the cooling tube 131 of the evaporator 130, and is heated at a high temperature by the heating unit 171. F) to transfer heat to the cooling tube 131 of the evaporator 130 to remove the frost.
- the heat pipe 172 may have a form (zigzag form) that is repeatedly bent like the cooling tube 131. To this end, the heat pipe 172 includes an extension part 172a and a heat dissipation part 172b.
- the extension part 172a forms a flow path for transferring the working liquid F heated by the heating unit 171 to the upper side of the evaporator 130.
- the extension part 172a is connected to the outlets 171c 'and 171c "of the heater case 171a provided at the bottom of the evaporator 130 and the heat dissipation part 172b provided at the upper part of the evaporator 130.
- the extension part 172a includes a vertical extension part extending upward of the evaporator 130.
- the vertical extension portion extends to an upper portion of the evaporator 130 in a state spaced apart from the support 133 on the outside of the support 133 provided on one side of the evaporator 130.
- the extension part 172a may further include a horizontal extension part according to the installation position of the heating unit 171.
- a horizontal extension portion for connecting the heating unit 171 and the vertical extension portion may be further provided.
- the heat dissipation part 172b is connected to the extension part 172a extending to the upper part of the evaporator 130 and extends in a zigzag form along the cooling tube 131 of the evaporator 130.
- the heat dissipation part 172b is composed of a combination of a plurality of horizontal pipes 172b 'constituting a heat and a connection pipe 172b "formed in a U-shaped pipe bent to connect them in a zigzag form.
- the extension portion 172a or the heat dissipation portion 172b may extend to a position adjacent to the accumulator 134 to remove frost accumulated on the accumulator 134.
- the vertical extension portion extends upward to a position adjacent to the accumulator 134 and then the cooling tube 131 is opened. It may be configured to be bent and extended downward toward the heat dissipation unit 172b.
- the heat dissipation part 172b is extended horizontally in connection with the vertical extension part and then extended upward toward the accumulator 134. May be extended downward to correspond to the cooling tube 131 again.
- the part connected to the outlets 171c 'and 171c "of the heater case 171a constitutes the inlet parts 172c' and 172c" into which the high temperature working fluid F flows, and the heater
- the portion connected to the inlets 171d 'and 171d "of the case 171a constitutes return parts 172d' and 172d" through which the cooled working fluid F is recovered.
- the working fluid F heated by the heater 171b is discharged to the inlets 172c 'and 172c "and transferred to the upper portion of the evaporator 130 through the extension 172a, and then radiates heat.
- Defrost is performed by transferring heat to the cooling pipe 131 while flowing along the portion 172b, and then returned through the return units 172d 'and 172d ", and are reheated by the heater 171b to heat the heat pipe 172. To form a circulation loop.
- the first and second heat pipes 172', 172" are inlet 171d of the heating unit 171. ', 171d ”) and outlets 171c' and 171c", respectively.
- the outlets 171c 'and 171c "of the heating unit 171 are composed of the first outlet 171c' and the second outlet 171c", and the first and second heat pipes 172 'and 172 ". Each end is connected to the first and second outlets 171c 'and 171c ", respectively.
- the working fluid F heated in the gas state by the heating unit 171 passes through the first and second heat pipes 172 ', through the first and second outlets 171c' and 171c ". 172 ") respectively.
- the first and second outlets 171c ′ and 171c ′′ may be formed at both sides of the outer circumference of the heater case 171a, or may be formed in parallel with the front end of the heater case 171a.
- first and second heat pipes 172 ', 172 connected to the first and second outlets 171c', 171c", respectively, is functionally (hot working fluid heated by the heater 171b) Part where F) flows in.
- the first and second inflow portions 172c 'and 172c may be understood.
- the inlets 171d 'and 171d "of the heating unit 171 are composed of a first inlet 171d' and a second inlet 171d", and the first and second heat pipes 172 'and 172 ". Each other end is connected to the first and second inlets 171d 'and 171d ", respectively.
- the working liquid F in the liquid state cooled while moving the respective heat pipes 172 is introduced into the heater case 171a through the first and second inlets 171d 'and 171d ". Inflow.
- the first and second inlets 171d 'and 171d ′′ may be formed at both outer circumferential sides of the heater case 171a, or may be formed in parallel to the rear end of the heater case 171a.
- first and second heat pipes 172 'and 172 connected to the first and second inlets 171d' and 171d", respectively, are functionally cooled (moving the respective heat pipes 172). Where the working fluid F in the liquid state is recovered] may be understood as the first and second return portions 172d 'and 172d ".
- the outlets 171c ′ and 171c ′′ of the heater case 171a may be formed at positions spaced apart from the front end of the heater case 171a by a predetermined distance.
- the front end of the heater case 171a may be understood to protrude forward through the outlets 171c 'and 171c ".
- the heating wire 171b2 of the heater 171b may extend from one point between the inlets 171d 'and 171d ′′ and the outlets 171c' and 171c ′′ to a position past the outlets 171c 'and 171c ′′. Accordingly, the outlets 171c 'and 171c "of the heater case 171a are positioned in the active heat generation unit AHP.
- part of the working fluid F stays at the front end of the heater case 171a (the space between the inner front end of the heater case 171a and the outlets 171c ', 171c ") of the heater 171b. It will prevent overheating.
- the working fluid F heated in the active heating unit AHP moves in the direction in which the working fluid F circulates, that is, toward the front end of the heater case 171a.
- a part is discharged to the branched outlets 171c 'and 171c ", but the other part passes through the outlets 171c' and 171c" and stays in a vortex at the front end of the heater case 171a.
- the heat pipe 172 may be configured to be accommodated between the plurality of cooling fins 132 fixed to each row of the cooling pipe 131. According to the above structure, the heat pipe 172 is arranged between the rows of the cooling tube 131. In this case, the heat pipe 172 may be configured to contact the cooling fins 132.
- the heat pipe 172 may be installed to pass through the plurality of cooling fins 132. That is, the heat pipe 172 is expanded in the state inserted into the insertion hole of the cooling fin 132 may be firmly fitted into the insertion hole. According to the above structure, the heat pipe 172 is disposed to correspond to the cooling tube 131.
- the heater 171b applied to the heating unit 171 of the present invention may be formed in a plate shape, and typically, a plate ceramic heater 171b may be used.
- the heater 171b may include a base plate 171b1, a heating wire 171b2, and a terminal 171b3.
- the base plate 171b1 is formed of a ceramic material and is formed in a plate shape extending in one direction.
- the base plate 171b1 is attached to the outer surface of the heater case 171a and is disposed along the longitudinal direction of the heater case 171a.
- the heating wire 171b2 is formed on the base plate 171b1, and the heating wire 171b2 is configured to generate heat when power is applied. With the base plate 171b1 attached to the outer surface of the heater case 171a, the heating wire 171b2 is disposed between the inlets 171d 'and 171d "and the outlets 171c' and 171c" of the heater case 171a. It extends from one point toward the exits 171c ', 171c ".
- the heating wire 171b2 may be formed by patterning a resistor (for example, a powder in which ruthenium and platinum are combined, tungsten, etc.) on the base plate 171b1 in a specific pattern.
- the heating wire 171b2 may extend along the longitudinal direction of the base plate 171b1.
- One side of the base plate 171b1 is provided with a terminal 171b3 configured to electrically connect the heating wire 171b2 and a power source, and a lead wire 173 electrically connected to the power source is connected to the terminal 171b3.
- the heater case 171a is partitioned into an active heating unit AHP corresponding to a portion where the heating wire 171b2 is disposed and a passive heating unit PHP corresponding to a portion where the heating wire 171b2 is not disposed.
- the active heating portion AHP is a portion directly heated by the heating wire 171b2, and the working fluid F in the liquid state is heated in the active heating portion AHP and phase-changed to a high temperature gas state.
- the outlets 171c ′ and 171c ′′ of the heater case 171a may be located in the active heating unit AHP or in front of the active heating unit AHP.
- the heating wires of the heater 171b may be provided.
- the portion in which the 171b2 is formed extends forward from below the outlets 171c 'and 171c "formed on the outer circumference of the heater case 171a. That is, in this embodiment, the outlets 171c 'and 171c "of the heater case 171a are located in the active heat generation unit AHP.
- the passive heating unit PHP is formed behind the active heating unit AHP.
- the passive heat generating unit (PHP) is not a portion directly heated by the heating wire (171b2) like the active heat generating unit (AHP), but is indirectly transferred to heat to a predetermined temperature level.
- the passive heating unit PHP may cause a predetermined temperature rise in the working liquid F in a liquid state, and does not have a high temperature enough to phase change the working liquid F into a gaseous state. That is, in terms of temperature, the active heat generating portion (AHP) forms a relatively high temperature portion, and the passive heat generating portion (PHP) forms a relatively low temperature portion.
- the recovered working fluid F is heated again to prevent the smooth flow back into the heater case 171a. May occur. This may interfere with the circulating flow of the working fluid F in the heat pipe 172, which may cause a problem that the heater 171b is overheated.
- the inlets 171d 'and 171d "of the heating unit 171 are formed in the passive heating unit PHP, so that the working fluid F returned after moving the heat pipe 172 is active. It is configured not to flow directly into the heating unit (AHP).
- the inlet 171d ', 171d “of the heating unit 171 is located in the passive heating part PHP, and the hydraulic fluid F returned after moving the heat pipe 172 is a passive heating part.
- the inlet 171d ', 171d “of the heating unit 171 is formed in the part in which the heating wire 171b2 is not arrange
- the passive heat generating portion PHP is related to the formation position of the heating wire 171b2. Therefore, unless the heating wire 171b2 is formed to extend to the inlets 171d 'and 171d "of the heating unit 171, the base plate 171b1 of the heater 171b corresponds to the inlet 171d' and 171d". It may be extended even. That is, the base plate 171b1 is disposed to cover most of the bottom surface of the heater case 171a, and the heating wire 171b2 is formed at a position outside the inlets 171d 'and 171d ′′, and thus the inlets 171d' and 171d ′′. Backflow of the working fluid F returned through the pump can be prevented.
- the heater case 171a includes a main case 171a1 and a first cover 171a2 and a second cover 171a3 coupled to both sides of the main case 171a1, respectively.
- the main case 171a1 has an empty space therein and has an open shape at both ends thereof.
- the main case 171a1 may be formed of aluminum.
- the main space 171a1 having a rectangular pillar shape is formed to have a rectangular cross-sectional shape and extend along one direction.
- the first and second covers 171a2 and 171a3 are mounted on both sides of the main case 171a1 so as to cover the opened both ends of the main case 171a1.
- the first and second covers 171a2 and 171a3 may be formed of the same aluminum material as the main case 171a1.
- outlets 171c 'and 171c "and the inlets 171d' and 171d” are respectively provided at positions spaced apart from each other along the longitudinal direction of the main case 171a1, and the outlets 171c 'and 171c ", respectively.
- Return units 172d 'and 172d are connected to each other.
- first outlet 171c 'and the first inlet 171d' are formed at positions spaced apart from each other along the longitudinal direction on one side of the main case 171a1, and on the other side facing the one surface.
- the second outlet 171c ′′ and the second inlet 171d ′′ are formed at positions spaced apart from each other along the longitudinal direction.
- first outlet 171c 'and the second outlet 171c may be disposed to face each other, and the first entrance 171d' and the second entrance 171d" may be disposed to face each other.
- At least one of the inlets 171d 'and 171d "and the outlets 171c' and 171c" may be formed in the first and / or second covers 171a2 and 171a3. The structure related to this will be described later in more detail.
- the heating unit 171 since the heating unit 171 is provided in the lower portion of the evaporator 130, defrost water generated due to the defrosting structure can flow down to the heating unit 171. Since the heater 171b provided in the heating unit 171 is an electronic component, a short may occur when the defrosting water contacts it. As such, the heating unit 171 of the present invention may have the following sealing structure in order to prevent moisture, including defrost water, from penetrating the heater 171b.
- a heater 171b is attached to the bottom of the main case 171a1, and first and second extension pins 171a1a and 171a1b are formed on both sides of the main case 171a1, respectively, extending downward from the bottom to be attached to the bottom. It is configured to cover the side of the heater 171b.
- the sealing member 171e covers the heater 171b in the recessed space R formed by the rear surface of the heater 171b and the first and second extension fins 171a1a and 171a1b.
- Silicon, urethane, epoxy, etc. may be used as the sealing member 171e.
- a liquid epoxy may be filled in the recessed space R to cover the heater 171b, and then may be cured to complete the sealing structure of the heater 171b.
- the first and second extension pins 171a1a and 171a1b function as sidewalls defining the recessed space R in which the sealing member 171e is filled.
- An insulating material 171f may be interposed between the rear surface of the heater 171b and the sealing member 171e. Mica sheets made of mica may be used as the insulating material 171f. Since the insulating material 171f is disposed on the rear surface of the heater 171b, heat transfer to the rear surface of the heater 171b may be restricted when the heating wire 171b2 generates heat due to application of power.
- a thermal conductive adhesive 171g may be interposed between the main case 171a1 and the heater 171b.
- the thermally conductive adhesive 171g transfers heat generated from the heater 171b to the main case 171a1 while attaching the heater 171b to the main case 171a1.
- heat resistant silicone that can withstand high temperatures may be used.
- At least one of the first and second covers 171a2 and 171a3 extends downward from the bottom surface of the main case 171a1, and together with the first and second extension fins 171a1a and 171a1b, the heater ( And may be configured to surround 171b. According to the above structure, filling of the sealing member 171e can be made easier.
- the first and second covers 171a2 and 171a3 may be formed.
- the cover corresponding to one side of the heater case 171a may be provided with a groove or a hole through which the lead wire 173 may pass even if the cover is not extended downward or is formed downward.
- the second cover 171a3 extends downward from the bottom of the main case 171a1, and the lead wire 173 extends toward the first cover 171a2.
- FIG. 7 to 9 are exploded perspective views illustrating examples in which the positions of the outlets 171c 'and 171c ′′ and the inlets 171d' and 171d ′′ of the heating unit 171 shown in FIG. 4 are modified.
- This modification differs only from the previous embodiment and the formation positions of the outlets 171c 'and 171c "and / or the inlets 171d' and 171d" of the heating unit 171, so that other configurations are not described above.
- Example configurations may be equally applicable.
- the inlet and the outlet of the heating unit 271 may be formed in the first and second covers 271a2 and 271a3, respectively.
- the first cover 271a2 is formed with the first and second outlets of the heating unit 271, and the first and second inlet portions 272c 'and 272c "connected to the first and second outlets, respectively.
- the first and second inlets of the heating unit 271 are formed together in the second cover 271a3 to connect the first and second inlets to the first and second inlets, respectively.
- Return units 272d 'and 272d may be arranged side by side.
- the outlet and the inlet of the heating unit 271 may be formed at both side surfaces of the main case 271a1, and may be formed in the first and second covers 271a2 and 271a3.
- combinations of the above structures are also possible.
- an outlet of the heating unit 371 may be formed in the main case 371a1, and an inlet of the heating unit 371 may be formed in the second cover 371a3.
- the first and second outlets of the heating unit 371 may be formed on both side surfaces of the main case 371a1 so as to face each other.
- the first cover and the second inlet of the heating unit 371 are formed in the second cover 371a3, and the first and second return portions 372d 'and 372d "respectively connected to the first and second inlets. Can be arranged side by side.
- the outlet of the heating unit 471 may be formed in the first cover 471a2, and the inlet of the heating unit 471 may be formed in the main case 471a1.
- the first cover and the second outlet of the heating unit 471 are formed in the second cover 471a3 so that the first and second inlets 472c 'and 472c "are connected to the first and second outlets, respectively.
- the first and second inlets of the heating unit 471 may be formed on both side surfaces of the main case 471a1 so as to face each other.
- 10 and 11 are conceptual views for explaining the circulation of the working liquid F in the state before and after the operation of the heater 171b.
- the working liquid F is placed in a liquid state, and is filled up to a predetermined row of the upper part based on the lowermost row of the heat pipe 172.
- the working fluid F may be filled up to the lower two rows of the heat pipe 172.
- the working liquid F in the heater case 171a is heated by the heater 171b.
- the working fluid F heated to a high temperature gas state F1 flows into the inlet portions 172c ′ and 172c ′′ of the heat pipe 172 and flows through the heat pipe 172.
- the heat dissipation is performed at 131.
- the working fluid F flows to the state F2 where liquid and gas coexist while losing heat during the heat dissipation process, and finally, the heat flow of the heat pipe 172 to the liquid state F3.
- the heating unit 171 flows into the heating unit 171.
- the working fluid F introduced into the heating unit 171 is reheated by the heater 171b, thereby repeating (circulating) the flow as described above, and in this process, heat is transferred to the evaporator 130, whereby the evaporator ( The frost accumulated in 130 is removed.
- the working fluid F flows due to the pressure difference generated by the heating unit 171 to rapidly circulate the heat pipe 172, so that the entire section of the heat pipe 172 reaches a stable operating temperature within a short time. This can be done, so that defrosting can be done quickly.
- the working fluid F flowing into the inlet portions 172c 'and 172c "has the highest temperature during the circulation process of the heat pipe 172 in the hot gas state F1.
- this hot gas state If convection of heat by the working fluid F placed in F1 is used, frost accumulated on the evaporator 130 can be removed more efficiently.
- the inlets 172c ′ and 172c ′′ may be disposed at a position that is relatively lower than the lowest heat or the lowest heat of the cooling pipe 131 provided in the evaporator 130.
- 172c ', 172c ") the high temperature working fluid F flowing through the heat transfer near the lowest heat of the cooling pipe 131, as well as the heat is raised to the cooling pipe 131 adjacent to the lowest heat Can be delivered.
- the working fluid F in order for the working fluid F to circulate the heat pipe 172 with such a phase change, the working fluid F must be filled in the heat pipe 172 in an appropriate amount.
- the temperature of some heat of the heat pipe 172 is at a stable operating temperature [50 ° or less]. (Frozen condition)] could not be reached. This decrease in temperature becomes more pronounced as the heat pipes 172 are closer to the return portions 172d 'and 172d ". This is because the working fluid F is excessive relative to the total volume of the heat pipes 172 and the heater case 171a. It can be seen that it means that the section in which the working liquid (F) flows into the liquid state increases.
- each column of the heat pipe 172 showed a higher temperature as it was closer to the inflow parts 172c 'and 172c ", and showed a lower temperature as it was closer to the return parts 172d' and 172d". .
- the difference between the temperature at the inlets 172c 'and 172c "(maximum temperature) and the temperature at the return parts 172d' and 172d" (minimum temperature) is also reduced. It was.
- the working fluid F is filled at 30% or more and 40% or less with respect to the total internal volume of the heat pipe 172 and the heater case 171a, and each defrosting is performed according to the heat transfer structure, stability, etc. of the defrosting device 170.
- the filling amount of the working fluid F optimized for each device 170 may be selected.
- FIG. 12 is a cross-sectional view of another example 571 of the heating unit 171 illustrated in FIG. 3, taken along a width direction.
- an outer fin 571a1c protrudes from an outer surface of the heater case for dissipating the heater case.
- the outer fins 571a1c may be integrally formed in the heater case as a protruding configuration in manufacturing the heater case (for example, extrusion of aluminum), or may be attached to the heater case by welding, adhesive, or the like as a separate configuration.
- the outer fins 571a1c are formed on the outer surface of the heater case, the outer area of the heater case is increased compared to the structure in which the outer fins 571a1c are not formed. As a result, heat exchange efficiency between the surrounding cold air and the heater case can be improved.
- the outer pin 571a1c may be formed on the top surface of the main case 571a1.
- the outer pins 571a1c may be provided in plural, and may be formed to extend along the longitudinal direction or the width direction of the main case 571a1 at predetermined intervals from each other.
- the outer pin 571a1c is shown extending along the longitudinal direction of the main case 571a1.
- the spacing between the plurality of outer pins 571a1c may be equal to the width of the outer pins 571a1c or wider than the width of the outer pins 571a1c. This is because when the separation distance between the plurality of outer pins 571a1c is narrower than the width of the outer pins 571a1c, the heat dissipation effect by the outer pins 571a1c is not large compared to the structure in which the outer fins 571a1c are not formed.
- the working fluids F are configured to be completely filled in the internal empty space of the main case 571a1. . This may be met if the heater case is provided at the bottom of the evaporator 130 and the working fluid F is filled at least 30% and at most 40% of the total internal volume of the heat pipe and the heater case as described above. have.
- FIG. 13 and 14 are conceptual views illustrating examples in which the shape of the external fins 571a1c is modified in the heating unit 571 illustrated in FIG. 12.
- the outer pins 671a1c may be formed not only on the upper surface of the main case 671a1 but also on other outer surfaces.
- the outer pins 671a1d may protrude from both outer surfaces of the main case 671a1, respectively.
- the outer fins 571a1d are the outlets 671c ', respectively. , 671c ′′) and the inlets 671d ′, 671d ′′.
- the outer pin 671a1e may protrude from an outer surface of at least one of the first and second covers 671a2 and 671a3.
- the outer fins 671a1e may have the first and second covers 671a2. , 671a3, the outlets 671c ′ and 671c ′′ and the inlets 671d ′ and 671d ′′ may protrude from the outer surface of the at least one cover that is not formed.
- the outer fin 771a1c may protrude in a protrusion form on the outer surface of the heater case 771a.
- the outer pins 771a1c may be provided in plural and may be disposed at predetermined intervals along the length direction and the width direction of the main case 771a1. Accordingly, the plurality of external pins 771a1c are arranged to form a matrix.
- a plurality of external pins 771a1c may be provided, and may have a shape protruding arbitrarily on an outer surface of the main case 771a1.
- the external area of the heater case by the external fin can be further increased.
- the heat exchange efficiency between the surrounding cold air and the heater case can be further improved, and the reliability and life of the heater can be further improved by preventing overheating of the heater.
- first and second extension pins described above may also be understood as a kind of external fins in that they are formed to protrude from the heater case. Therefore, the above effect can also be achieved by the first and second extension pins.
- 15 and 16 are cross-sectional views taken along the width direction and the length direction of another example 871 of the heating unit 171 illustrated in FIG. 3.
- an inner fin 871a1f is formed to protrude from the inside of the heater case for improving heat transfer performance of the heater 871b.
- the internal fins 871a1f may be integrally formed in the heater case (for example, extrusion molding of aluminum) as a protruding configuration in manufacturing the heater case, or may be attached to the heater case by welding, adhesive, or the like as a separate configuration.
- the contact area between the heater case and the working fluid F filled therein is increased, and the heat transfer from the heater 871b to the working fluid F is transferred.
- the amount can be increased.
- the total volume of the heater case is increased, so that the heat capacity that can receive heat in the heater case is increased, and thus it is possible to receive more heat generated by the heater 871b. As a result, the defrosting performance can be improved.
- the inner fin 871a1f protrudes from the inner surface of the main case 871a1 to the inner surface of the outer surface to which the heater 871b is attached.
- the heater 871b is attached to the outer bottom of the main case 871a1, and the inner fins 871a1f protrude from the inner bottom of the main case 871a1.
- the inner pins 871a1f may be formed to protrude to a length of 1/2 or less than an inner height of the main case 871a1.
- the working fluid F is prevented from flowing smoothly.
- the internal pins 871a1f may be provided in plural, and may be formed to extend along the longitudinal direction or the width direction of the main case 871a1 at predetermined intervals from each other. In this embodiment, it is shown that the internal pins 871a1f extend along the longitudinal direction of the main case 871a1. When the internal pins 871a1f are formed integrally with the main case 871a1 by extrusion molding of the main case 871a1, the internal pins 871a1f extend along the longitudinal direction of the main case 871a1. It has a structure.
- the spacing between the plurality of inner pins (871a1f) is preferably set to more than 1 times the width of the inner pins (871a1f). This is because when the separation distance between the plurality of inner pins 871a1f is narrower than the width of the inner pins 871a1f, the flow between the plurality of inner pins 871a1f is significantly reduced.
- the separation interval between the plurality of inner pins (871a1f) is set to less than twice the width of the inner pin (871a1f), the main case ( It is desirable to allow a large number of internal pins 871a1f to be provided in the 871a1.
- the interval between the inner wall of the main case 871a1 and the inner pins 871a1f adjacent to the inner wall is set to be one or more times two times or less than the width of the inner pins 871a1f.
- the working fluids F are configured to be completely filled in the inner empty space of the main case 871a1. . This may be met if the heater case is provided at the bottom of the evaporator 130 and the working fluid F is filled at least 30% and at most 40% of the total internal volume of the heat pipe and the heater case as described above. have.
- FIG. 17 is a cross-sectional view illustrating an example in which a formation position of an internal fin 971a1f is modified in the heating unit 971 illustrated in FIG. 16.
- the internal pins 871a1f extend along the longitudinal direction of the main case 871a1 from one end of the main case 871a1 to the other end.
- the outlets 871c " (opposite exit not shown) and the inlet 971d " (opposite entrance not shown) are provided along the longitudinal direction of the main case 871a1 on both sides of the main case 871a1, respectively.
- the inner pins 871a1f protrude to the height at which the inlet 871d "and the outlet 871c" are formed. Therefore, as shown in FIG. 16, the inner pins 871a1f are arranged to cover a part of the outlet 871c ′′ and the inlet 871d ′′ at predetermined intervals along the width direction of the main case 871a1. do.
- the structure of the inner pin (871a1f) is formed to protrude to a length less than 1/2 of the inner height of the main case (871a1), the inner wall of the main case (871a1) and the inner pin (871a1f) adjacent to the inner wall If the gap is formed more than one times the width of the inner fins 871a1f, the working fluid F does not have a great effect on being discharged through the outlet 871c "and recovered through the inlet 871d". It is true that there is some impact.
- an inner pin 971a1f protruding from the inner bottom of the main case 971a1 is provided between the inlet 971d "(the opposite side inlet not shown) and the outlet 971c" (the opposite side outlet not shown). It is showing that it was formed.
- the inner pin 971a1f does not cover the outlet 971c "and the inlet 971d" of the main case 971a1 along the width direction of the main case 971a1. Therefore, the working fluid F can be smoothly recovered through the inlet 971d ′′, and by the internal fins 971a1f when the recovered working fluid F is reheated by the heater 971b while flowing forward. More heat is received and the reheated working fluid F can be smoothly discharged through the outlet 971c ".
- FIG. 18 is a cross-sectional view illustrating another example 1071 of the heating unit 171 illustrated in FIG. 3.
- the structure illustrated in FIG. 18 may be understood as a combination of structures related to the outer pin and the inner pin described above. That is, an outer fin 1071a1c for projecting heat dissipation of the main case 1071a1 is formed on the outer surface of the main case 1071a1, and an inner fin for improving the heat transfer performance of the heater 1071b inside the main case 1071a1. 1071a1f is formed to protrude.
- frost formed on the evaporator 130 starts to be removed.
- the working fluid F is heated by the heater 171b and flows through the heat pipe 172.
- heat is radiated to the cooling pipe 131 of the evaporator 130, and the cooling pipe 131 From the frost to the implanted ice will melt.
- the frost to ice is changed to water, that is, defrost water due to defrosting to fall to the bottom of the evaporator 130, in some cases defrosting water may also fall on the heating unit 171 provided at the bottom of the evaporator (130).
- the heating wire 171b2 and the terminal 171b3 of the heater 171b and the lead wire 173 connected to the terminal 171b3 include a conductor, a short may occur when contacting the defrost water.
- the structure in which the heater 171b is attached to the bottom surface of the heater case 171a, the structure in which the sealing member 171e is disposed to cover the heater 171b, and the first and second sides of the heater case 171a are provided. And the second extension pins (171a1a, 171a1b) protrudingly formed to accommodate the heater 171b therein, the contact between the heater 171b and the defrost water can be prevented to a certain level.
- the lead wire 173 is exposed to the outside of the heater case 171a and has an extended form. Due to this configuration, when the defrost water flowing into the lead wire 173 is cooled after defrosting to generate frost or ice, the weight increases, thereby affecting contact with the terminal 171b3, or some defrost water leads to The wire 173 may flow into the heater 171b or the power supply side to cause a short.
- the heating unit 171 is disposed in a form extending along the left and right directions at one bottom of the evaporator 130.
- the heating unit 171 may be disposed to extend along the left and right directions of the evaporator 130 at the same height as the lowest row of the cooling tube 131 or lower than the lowest row of the cooling tube 131.
- the lead wire 173 connecting between the heater 171b and the power source is configured to extend outwardly from one end of the heater 171b adjacent to the outside of the evaporator 130. That is, the lead wire 173 is configured to extend toward the outside of the evaporator 130 and to be connected to the power source. According to the above structure, the area where the lead wire 173 is disposed below the evaporator 130 may be minimized, and thus the defrosting water may be minimized to the lead wire 173.
- FIG 19 illustrates that the heating unit 171 is disposed on the bottom left of the evaporator (130).
- the lead wire 173 is configured to extend outward from the left end of the heater 171b adjacent to the left side of the evaporator 130.
- the terminal 171b3 connected to the lead wire 173 is preferably located at the left end of the heater 171b.
- FIG. 20 illustrates that the heating unit 171 is disposed at the bottom right of the evaporator 130.
- the lead wire 173 is configured to extend outward from the right end of the heater 171b adjacent to the right side of the evaporator 130.
- the terminal 171b3 connected to the lead wire 173 is preferably located between the inlet and the outlet, adjacent to the inlet of the heater case 171a.
- the right end of the heater 171b is disposed between the inlet and the outlet of the heater case 171a so that the working fluid F recovered through the inlet located at the right end of the heater case 171a is not reheated and flowed back. It is desirable to be.
- the heating wire 171b2 is not disposed at the inlet of the heater case 171a, so that the inlet is located in the passive heating unit PHP.
- the returned working fluid F is immediately before flowing into the heater case 171a. At least once, the direction is changed, since the flow resistance is largely formed in the bent portion, so that backflow of the returned working fluid F can be prevented.
- the heater case 171a is horizontally disposed on the evaporator, but is not necessarily limited thereto.
- the heater case 171a may be disposed such that the inlet end is within an angle range of -90 ° to 2 ° with respect to the outlet end. This will be discussed in detail later.
- FIG. 21A to 21C are graphs showing the temperature change of the heater 171b for each inner diameter of the return units 172d 'and 172d ′′ shown in FIG. 4 under the freezing condition, and FIG. 22 is a return unit 172d' under the condition of FIG. 21C. 172d ”) conceptually illustrates the flow of fluid.
- FIG. 21A is a case where the inner diameters of the return parts 172d 'and 172d "are 4.75 mm
- FIG. 21B is a case where the inner diameters of the return parts 172d' and 172d" are 6.35 mm
- FIG. 21C is a return part 172d '. , 172d ") is 7.92mm.
- the appropriate amount of the working fluid F is set to 55g, 60g, and 65g, respectively, and the inner diameter heater 171b of the return parts 172d 'and 172d" is used. The temperature change of) was measured.
- the working fluid Fa introduced into the heater case 171a is reheated by the heater 171b to strongly flow in the heating unit 171, and the heated part of the working fluid Fb returns to the return unit 172d.
- 172d is discharged to the upper space, and as a result, a part of the working fluid Fb flows back to the return parts 172d' and 172d".
- the above phenomenon occurs as the inner diameters of the return parts 172d 'and 172d "are changed. Therefore, in order to prevent overheating of the heater 171b and backflow of the working liquid F, the inlet 171d' is prevented. , 171d ”) must be formed in the passive heat generating portion PHP, and the return portions 172d 'and 172d " must have appropriate inner diameters.
- the amount of the working fluid F used in the experiment is 55g, 60g, which is the total volume of the heat pipe 172 and the heater case 171a.
- the filling amount corresponds to 30-35%.
- the inner diameters of the return parts 172d 'and 172d may be formed to be larger than 5 mm and smaller than 7 mm.
- a commercial pipe having a 6.35 mm inner diameter within the above range is returned to the return parts 172d' and 172d". Can be used.
- a heater case 171a having a cross section having a width of 8 mm (height) x 13 mm (width) was used.
- the spec of the heater case 171a may be slightly different from the specification used for the experiment.
- the return parts 172d 'and 172d "have the same inner diameter condition as the return parts 172d' and 172d". Can be used.
- the working fluid F heated and evaporated by the heater 171b in the heater case 171a flows into the inlets 172c 'and 172c "of the heat pipe 172, and heat The working fluid F cooled while flowing through the pipe 172 is recovered into the heater case 171a through the return parts 172d 'and 172d ′′ of the heat pipe 172.
- the installation angle of the heater case 171a with respect to the heat pipe 172 plays an important role in whether the working fluid F is circulated. This will be described below in detail.
- TH is the temperature of the heater case 171a
- TL represents the temperature of the lowest heat of the heat radiating portion 172b of the heat pipe 172. Since the working fluid F is heated by the heater 171b to circulate the heat pipe 172 and then returned to the heater case 171a, the temperature TH of the heater case 171a is the highest, and the heat dissipation part ( The temperature TL of the lowest heat of 172b) is the lowest. Thus, it can be understood that the temperature of the remaining rows of heat pipe 172 is between TH and TL. In FIG. 23, only a temperature curve corresponding to TH and TL is shown as a leader line for convenience of description.
- 0 ° means that the heater case 171a is disposed horizontally in the evaporator 130, and a positive angle indicates that the inlet 171d 'and 171d' side ends of the heater case 171a have an outlet 171c '. , 171c ") side, and a negative (-) angle means that the inlet (171d ', 171d") end of the heater case 171a is the outlet (171c', 171c ") end. It means that arranged downward with respect to.
- the heater case 171a is disposed horizontally on the evaporator 130, or the ends of the inlet 171d ′ and 171d ′′ of the heater case 171a are exited.
- (171c ', 171c ") side is disposed downward (outlet 171c', 171c" side is formed at the same height as the inlet 171d ', 171d "side, or exit 171c', 171c" side )
- Side is formed at a position higher than the inlet (171d ', 171d ") side]
- the temperature of each row of the heater case 171a and the heat pipe 172 increases similarly with time, and after a certain time A stable operating temperature is reached. This means that the circulation of the working fluid F is made smoothly.
- the inlet (171d ', 171d ") side ends of the heater case 171a are disposed 2 ° upward with respect to the end of the outlet (171c', 171c") side (inlet (171d ', 171d ") side. 2 ° upwards with respect to the outlets 171c 'and 171c ", and did not show much difference from the preceding graphs.
- the inlet 171d 'and 171d "side end portions of the heater case 171a are disposed 4 ° or more upward with respect to the end portions of the outlet 171c' and 171c" side (the inlet 171d 'and 171d "side outlets ( 171c ', 171c ”) upwards with respect to the side), the working fluid F does not go down toward the inflow portions 172c', 172c", but rather through the return portions 172d ', 172d ". Since the reverse flow does not circulate, the temperature of the heater case 171a is continuously raised to overheat.
- the heater case 171a is arranged such that the end portions of the inlet portions 171d 'and 171d "have an angle range of -90 ° or more and 2 ° or less with respect to the ends of the outlets 171c' and 171c". It is desirable to be.
- FIG. 171 the connection structure between the heating unit 171 and the heat pipe 172 in which the working fluid F is easy to flow will be described in consideration of the rising characteristic of the heated working fluid F.
- FIGS. 24 to 26 are longitudinal cross-sectional views illustrating a modified example of a connection structure between the heating unit 171 and the heat pipe 172 in the heating unit 171 applied to FIGS. 19 to 20.
- the heating units 1171, 1271, and 1371 are briefly illustrated with only the heater cases 1171a, 1271a, and 1371a and the heaters 1171b, 1271b, and 1371b.
- the above-described detailed structures may be applied to the heating units 1171, 1271, and 1371.
- the heater cases 1171a, 1271a, and 1371a are described based on the horizontal arrangement of the evaporator, but the present invention is not limited thereto.
- the heater cases 1171a, 1271a, and 1371a have an inlet [1171d “, 1271d", 1371d “(opposite inlet not shown), and an outlet [1171c", 1271c ", 1371c” (opposite outlet not shown). )] May be arranged to have an angular range of -90 ° to 2 ° with respect to the side end portion.
- the inlet (1171d “, 1271d”, 1371d ”) and the outlet (1171c", 1271c “, 1371c”) are spaced apart at predetermined intervals along the longitudinal direction on both sides of the heater case (1171a, 1271a, 1371a)
- the present invention is not limited thereto.
- At least one of the inlet (1171d “, 1271d”, 1371d ") and outlet (1171c", 1271c ", 1371c" of the heating units (1171, 1271, 1371) is the end (preceding) of the heater case (1171a, 1271a, 1371a)
- FIGS. 7 to 9 The structure shown in FIGS. 7 to 9).
- the working fluid F is recovered through the inlets 1171d “, 1271d”, and 1371d ", and then reheated by the heaters 1171b, 1271b, and 1371b, and the outlets 1171c", 1271c ", and 1371c". To be discharged.
- the return portions 1172d “, 1272d”, and 1372d “(not shown) of the heat pipe are arranged in the heater case 1171a, 1271a, 1371a or parallel to or extending downwards (or extending downwards and bent horizontally below) of the heater cases 1171a, 1271a, and 1371a, inlet portions of the heat pipes 1172c “, 1272c", 1372c “(opposite side not shown)] is disposed in parallel with the heater cases 1171a, 1271a, 1371a or extends upward from the heater cases 1171a, 1271a, 1371a.
- the meaning of extending upwardly and / or downwardly includes not only extending vertically but also extending obliquely.
- both the return parts 1172d “, 1272d”, and 1372d “and the inflow parts 1172c", 1272c “, and 1372c” extend along the length direction of the heater cases 1171a, 1271a, and 1371a. Although it may be formed, only one of the return portion 1172d “, 1272d", and 1372d “and the inlet portion 1172c", 1272c “, and 1372c” from the viewpoint of the flow design in consideration of the lifting force of the working fluid F is provided. It is preferable to extend along the longitudinal direction of 171a).
- the return portion 1172d ′′ of the heat pipe extends along the longitudinal direction of the heater case 1171a, and the inlet portion 1172c ′′ of the heat pipe extends above the heater case 1171a. It is showing that it was formed.
- the return portion 1272d ′′ of the heat pipe is formed to extend below the heater case 1271a, and the inflow portions 1272c ′ and 1272c ′′ of the heat pipe are formed above the heater case 1271a. It is shown to be formed extending.
- inlet portions 1172c “ and 1272c " of the heat pipe are formed extending upwardly of the evaporator, as shown in FIG. 19, the heating unit 171 has a vertical extension of the heat pipe 172. It can be applied to a structure that is directly connected to the wealth. In this case, the lower end part of the vertical extension part constitutes inflow parts 1172c "and 1272c".
- the terminals (not shown) of the heaters 1171b and 1271b are adjacent to the outlets 1171c "and 1271c" of the heater cases 1171a and 1271a.
- lead wires 1173 and 1273 are connected to the terminal and configured to extend outwardly.
- the heater case 1171a Even when 1271a is disposed horizontally, the working fluid F heated by the heaters 1171b and 1271b can be smoothly discharged through the inlets 1172c ′′ and 1272c ′′.
- the structure shown in FIG. 25 has a structure in which the return portion 1272d "of the heat pipe 1272 extends below the heater case 1271a, so that the working fluid F is heated and has a lifting force.
- This structure is difficult to back flow to the return portion 1272d ".
- a more natural flow can be formed in which the heated working fluid F is discharged through the inlet portion 1272c " without a back flow to the return portion 1272d ".
- the return part 1372d ′′ of the heat pipe 1372 extends below the heater case 1372a, and the inflow part 1372c ′′ of the heat pipe 1372 is the heater case ( 1371a) is shown extending along the longitudinal direction.
- the heating unit 171 of the heat pipe 172 is formed in that the inlet portion 1372c ′′ of the heat pipe 1372 extends along the longitudinal direction of the heater case 1372a.
- the end portion of the horizontal extension portion constitutes the inlet portion 1372c ′′.
- a terminal (not shown) of the heater 1371b is formed between the inlet 1371d ′′ and the outlet 1372c ′′ of the heater case 1371a, and leads Wire 1373 is connected to the terminal and configured to extend outward.
- the heater case 1471a has an inlet (1471d ", opposite inlet not shown) side end at an angle of -90 ° with respect to the outlet (1471c", opposite outlet not shown) side, that is, the lower side of the evaporator 1430. It may be formed extending in the vertical direction toward the upper side.
- inlet (1471d ", opposite inlet not shown) side end at an angle of -90 ° with respect to the outlet (1471c", opposite outlet not shown) side, that is, the lower side of the evaporator 1430. It may be formed extending in the vertical direction toward the upper side.
- 27 and 28 are front and perspective views illustrating a second embodiment 1470 of the defrost apparatus 170 applied to the refrigerator 100 of FIG. 1.
- the heating unit 1471 may be disposed at one outer side of the defrosting device 1470.
- the heater case 1471a may be located outside the support 1433 provided at one side of the evaporator 1430, and may be formed to extend in a vertical direction from the lower side of the evaporator 1430 to the upper side.
- at least a part of the heater case 1471a may be disposed between the first cooling tube 1431 ′ and the second cooling tube 1431 ′′.
- the heater cases 1471a are respectively connected to the heat pipes 1472 to form a flow path through which the working liquid F can circulate.
- an outlet 1471c "and an inlet 1471d" are formed on the upper side and the lower side of the heater case 1471a, respectively.
- the outlet 1471c ′′ is connected with the extension of the heat pipe 1472, and the inlet 1471d ′′ is connected with the lowest row of the heat dissipation 1472b of the heat pipe 1472.
- the heater 1471b includes a plate heater 1471b extending along one direction, and is attached to an outer surface of the heater case 1471a and disposed vertically in the vertical direction of the evaporator 1430.
- the heating unit 1471 is briefly illustrated by using only the heater case 1471a and the heater 1471b for convenience of description.
- the heating unit 1471 may include the above-described detailed structure (a structure in which the first and second extension pins, the sealing member, the outer pin, the inner pin, etc. are formed).
- the heater 1471b is attached to one surface of the heater case 1471a facing outward. According to the arrangement, the defrost water generated due to the defrost can be prevented from contacting the heater 1471b to a certain level.
- the present invention is not limited thereto.
- the heater 1471b may be attached to the other surface of the heater case 1471a facing the support 133. However, in this case, it is preferable that a structure is provided to prevent contact between the heater 1471b and the defrost water.
- the external fin may protrude from the other surface of the heater case 1471a facing the support 133, and the internal fin may be formed.
- the silver may protrude from an inner inner surface of one surface to which the heater 1471b is attached.
- the heating wire 1471b2 of the heater 1471b extends toward the outlet 1471c "between the inlet 1471d” and the outlet 1471c ", and reheats the working fluid F recovered through the inlet 1471d". Is done.
- a terminal (not shown) of the heater 1471b may be formed at an end portion of the heater 1471b positioned between the inlet 1471d ′′ and the outlet 1471c ′′, and a lead wire 1473 may be connected to the terminal to form an evaporator ( It is configured to extend toward the lower side of 1430.
- the working fluid F is preferably filled higher than the top of the heater (1471b) extending in the vertical direction in the heater case (1471a). According to such a configuration, the defrosting operation can be performed safely without the heating unit 1471 being not overheated, and the continuous supply of the working fluid F in the gas state to the heat pipe 1472 can be made stable.
- FIG. 29 is a conceptual view illustrating a third embodiment 1570 in which a width between an upper row and a lower row of a heat pipe 1572 is different in a defrosting device 170 applied to the refrigerator 100 of FIG. 1.
- the defrost apparatus 1570 is shown from the front side (a) and the side surface (b).
- the front first cooling tube 1531 ′ is omitted so that the overall shape of the heat pipe 1572 is revealed.
- a portion of the rear second cooling tube 1531 ′′ does not appear to overlap with the heat pipe 1572, but referring to the arrangement of the cooling fins 1532 and FIG. 29 (b), the first and second cooling tubes
- the overall shape of the tubes 1531 ', 1531 "can be seen.
- the cooling tube 1531 and the heat pipe 1572 are repeatedly bent in a zigzag form to form a plurality of rows.
- the cooling pipe 1531 may be configured by a combination of the horizontal pipe portion and the bending pipe portion.
- the horizontal pipes are arranged horizontally with each other up and down and pass through the cooling fins 1532, and the bending pipes are configured to connect the ends of the upper horizontal pipes and the ends of the lower horizontal pipes, respectively.
- each column may be arranged at a predetermined interval.
- the heat pipe 1572 is disposed between the first cooling tube 1531 ′ and the second cooling tube 1531 ′′ to form a single row.
- the heat pipe 1572 is an extension portion 1572a and a heat dissipation portion ( 1572b)
- the description of the extension portion 1572a will be replaced with the description in the foregoing embodiment.
- the heat dissipation unit 1572b extends in a zigzag form along the cooling tube 1531 of the evaporator 1530 in the extension unit 1572a and is connected to the inlet of the heating unit 1571.
- the heat dissipation unit 1572b is composed of a combination of a plurality of horizontal tubes 1572b 'constituting a heat and a connecting tube 1572b ′′ formed in a U-shaped tube bent to connect them in a zigzag form.
- the spacing between the rows of the lower horizontal tubes 1572b ' may be narrower than the spacing between the rows of the upper horizontal tubes 1572b'. This is a design in consideration of the convection depending on the temperature of the working fluid F when the working fluid F circulates through the heat pipe 1572.
- the working fluid F introduced through the inlet of the heat pipe 1572 has the highest temperature during the circulation process of the heat pipe 1572 in a hot gas state. As shown, since the high temperature working liquid F is moved toward the cooling tube 1531 positioned at the upper portion, the high temperature heat is transferred to the wide region by convection around the upper cooling tube 1531.
- the working fluid (F) gradually flows in a state in which liquid and gas coexist while losing heat, and eventually flows into the return portion in a liquid state, where the heat is sufficient to defrost the cooling tube 1531. Although it is a temperature, the degree of heat transfer to the surroundings is inevitably lowered compared to the previous case.
- each row of the heat pipes 1572 close to the return portion (that is, the horizontal tube 1572b 'of the heat dissipation portion 1572b) has a narrower gap than that of the heat pipes 1572 positioned at the top thereof. Is placed.
- each row of the heat pipes 1572 positioned at the top may be arranged to correspond to the rows of adjacent cooling pipes 1531 with one row of the cooling pipes 1531 interposed therebetween, and the heat positioned at the bottom thereof.
- Each row of pipes 1572 may be disposed to correspond to each row of the cooling tube 1531.
- FIG. 30 and 31 are conceptual views illustrating a modified example 1670 of the defrosting apparatus 1570 illustrated in FIG. 29.
- the defrost apparatus 1670 is shown from the front side (a) and the side surface (b).
- the heat pipe 1652 consists of a first heat pipe 1672 'in front of the first cooling tube 1631' and a second heat pipe 1672 "behind the second cooling tube 1631". To form two rows.
- the second heat pipe 1672 ′′ does not appear to overlap with the first heat pipe 1672 ′. However, referring to FIG. 30B, the second heat pipe 1672 ′′ is shown. The overall form of the can be seen.
- the spacing between the rows of horizontal tubes 1672b 'disposed below the first and second heat pipes 1672' and 1672 is narrower than the spacing of the columns of the horizontal tubes 1672b 'disposed above.
- This is a design in consideration of the convection according to the temperature of the working fluid (F) when the working fluid (F) circulates through the heat pipe (1672), detailed description thereof will be replaced with the description of FIG. do.
- the spacing between the rows arranged under the first heat pipe 1772 ′ in front of the evaporator 1730 may be narrower than the spacing between the rows arranged above.
- the spacing between the rows arranged above the second heat pipe 1772 ′′ behind the evaporator 1730 may be narrower than the spacing between the rows arranged below.
- the temperature drop due to the wide interval of one heat pipe 1772 is made to be compensated by the temperature rise by the narrow interval of the other heat pipe 1772.
- the first and second heat pipes 1772 'and 1772 are shorter than the basic structure (the structure shown in FIG. 3), an efficient heat transfer structure to the cooling tube 1731 can be realized.
- the spacing between the rows arranged under the first heat pipe 1772 ′ in front of the evaporator 1730 may be wider than the spacing between the rows arranged above.
- the spacing between the rows arranged above the second heat pipe 1772 ′′ behind the evaporator 1730 may be wider than the spacing between the rows arranged below.
- FIG. 32 and 33 are front and perspective views illustrating a fourth embodiment 1870 of the defrosting device 170 applied to the refrigerator 100 of FIG. 1.
- a part of the cooling fins 1832 is omitted.
- a detailed configuration of the evaporator 1830 is shown in more detail in FIG.
- the heat pipe 1872 may be divided into a high temperature evaporation unit E and a low temperature condensation unit C in view of the state of the circulating working fluid F.
- the evaporator E is a portion in which the working liquid F is moved to a state containing a high temperature gas or a high temperature gas and a liquid, and has a temperature at which the cooling tube 1831 can be defrosted. Structurally, the evaporator E is connected to the outlet of the heating unit 1871 and is disposed to correspond to the cooling tube 131 of the evaporator 1830 to transfer heat to the cooling tube 1831 of the evaporator 1830. Is done.
- the condensation part C is a portion in which the working liquid F flows in a low temperature liquid state, and has a temperature lower than a temperature at which defrosting on the cooling tube 1831 may be performed. Therefore, even if the condensation part C is arrange
- the condensation part C is finally connected to the inlet of the heating unit 1187.
- the condensation unit (C) is adjacent to the lower cooling tube (1831). Will be deployed. This means that defrosting on the lower side cooling pipe 1831 cannot be performed smoothly.
- the condensation unit C extends from the evaporator E and is disposed below the lowest heat cooling tube 1831 a of the evaporator 1830.
- Condensation unit (C) is configured to include at least two horizontal pipes arranged below the lowest heat cooling tube (1831a).
- the heat pipe 1872 has two more rows below the lowest row of the cooling tubes 1831 of the evaporator 1830 to form the condensation unit (C).
- the lower end of the heating unit 1187 is disposed adjacent to the lowest heat cooling tube 1831a. Accordingly, the return portion of the heat pipe 1872 extends upwardly bent from the lowest row horizontal pipe of the condensation part C to the inlet of the heating unit 1871 so that the condensed working liquid F can be recovered. To form a flow path.
- 34 and 35 are front and perspective views showing an example 1970 in which the formation position of the heating unit 1971 is modified in the defrosting apparatus 1870 shown in FIGS. 32 and 33.
- At least a portion of the heating unit 1971 is disposed below the lowest thermal cooling tube 1931 of the evaporator 1930.
- the lower end of the heating unit 1971 may be located adjacent to the lowest heat horizontal pipe of the heat pipe 1972, and the upper end of the heating unit 1971 may be located in the lowest heat cooling tube 1931a of the evaporator 1930.
- Above the first cooling conduit 1931b (ie the second cooling conduit from below).
- the return portion connecting the lowest row horizontal pipe of the heat pipe 1972 and the inlet of the heating unit 1971 is formed shorter than the return portion of the previous embodiment.
- the return portion extends horizontally from the lowest row horizontal pipe of the heat pipe 1972 to heat the unit 1971.
- the heating unit 1971 is disposed adjacent to the lowest row horizontal pipe of the heat pipe 1972, the heater 1971b is operated with a smaller amount of the working fluid F than in the previous embodiment.
- (F) can be configured to be located below the water surface.
- the temperature of the lowest heat horizontal pipe of the heat pipe 1972 may be increased. This means that the lower temperature of the evaporator E rises as compared with the previous example.
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- Chemical & Material Sciences (AREA)
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Abstract
Description
Claims (15)
- 증발기에 구비되는 히팅 유닛; 및양단부가 상기 히팅 유닛의 입구와 출구에 각각 연결되고, 상기 히팅 유닛에 의해 가열되어 이송되는 고온의 작동액에 의해 상기 증발기의 냉각관에 방열하도록 적어도 일부가 상기 냉각관에 인접하게 배치되는 히트 파이프를 포함하며,상기 히팅 유닛은,내부에 빈 공간을 구비하고, 길이방향을 따라 상호 이격된 위치에 상기 입구와 상기 출구를 각각 구비하는 히터 케이스; 및상기 히터 케이스의 외부면에 부착되어 상기 히터 케이스 내의 작동액을 가열하도록 구성되는 히터를 포함하는 것을 특징으로 하는 제상 장치.
- 제1항에 있어서,상기 히터는,세라믹 재질로 형성되고, 상기 히터 케이스의 외부면에 부착되는 베이스 플레이트;상기 베이스 플레이트에 형성되며, 전원 인가시 발열하도록 구성되는 열선; 및상기 베이스 플레이트에 구비되어 상기 열선과 전원을 전기적으로 연결하도록 구성되는 터미널을 포함하는 것을 특징으로 하는 제상 장치.
- 제2항에 있어서,상기 히터 케이스는, 상기 열선이 배치되는 부분에 대응되는 능동발열부와, 상기 열선이 미배치되는 부분에 대응되는 수동발열부로 구획되고,상기 히트 파이프를 이동한 후 상기 입구를 통하여 리턴되는 작동액이 재가열되어 역류하는 것을 방지하도록, 상기 입구는 상기 수동발열부에 형성되는 것을 특징으로 하는 제상 장치.
- 제2항에 있어서,상기 열선은 상기 입구와 상기 출구 사이의 일 지점으로부터 상기 출구를 향하여 연장 형성되는 것을 특징으로 하는 제상 장치.
- 제1항에 있어서,상기 히터는 상기 히터 케이스의 저면에 부착되는 것을 특징으로 하는 제상 장치.
- 제5항에 있어서,상기 히터 케이스의 양측에는 각각 저면으로부터 하측으로 연장 형성되어 상기 저면에 부착된 히터의 양측면을 덮도록 구성되는 제1 및 제2연장핀이 구비되는 것을 특징으로 하는 제상 장치.
- 제6항에 있어서,상기 히터의 배면과 상기 제1 및 제2연장핀에 의해 형성되는 리세스된(recessed) 공간에는 실링부재가 상기 히터를 덮도록 충진되며,상기 히터의 배면과 상기 실링부재 사이에는 절연재가 개재되는 것을 특징으로 하는 제상 장치.
- 제6항에 있어서,상기 히터 케이스는,내부에 빈 공간을 구비하고, 양단부가 개구된 형태를 가지며, 저면에 상기 히터가 부착되는 메인 케이스; 및상기 메인 케이스의 개구된 양단부를 각각 덮도록 장착되는 제1커버와 제2커버를 포함하는 것을 특징으로 하는 제상 장치.
- 제1항에 있어서,상기 히터가 미부착된 상기 히터 케이스의 다른 외부면에는 외부핀이 돌출 형성되는 것을 특징으로 하는 제상 장치.
- 제9항에 있어서,상기 히터는 상기 히터 케이스의 저면에 부착되고,상기 외부핀은 상기 히터 케이스의 상면에 형성되는 것을 특징으로 하는 제상 장치.
- 제9항에 있어서,상기 외부핀은 복수 개로 구비되어, 상호 소정의 이격 간격을 두고 상기 히터 케이스의 길이방향 또는 폭방향을 따라 연장 형성되며,상기 이격 간격은 상기 외부핀의 폭과 같거나 상기 외부핀의 폭보다 넓게 설정되는 것을 특징으로 하는 제상 장치.
- 제1항에 있어서,상기 외부면 내측의 내부면에는 내부핀이 돌출 형성되는 것을 특징으로 하는 제상 장치.
- 제12항에 있어서,상기 히터는 상기 히터 케이스의 외부 저면에 부착되고,상기 내부핀은 상기 히터 케이스의 내부 저면으로부터 돌출 형성되는 것을 특징으로 하는 제상 장치.
- 제13항에 있어서,상기 내부핀은 상기 히터 케이스의 내부 높이 대비 1/2 이하의 길이로 돌출 형성되는 것을 특징으로 하는 제상 장치.
- 제13항에 있어서,상기 내부핀은 복수 개로 구비되어, 상호 소정의 이격 간격을 두고 상기 히터 케이스의 길이방향을 따라 연장 형성되며,상기 히터 케이스의 내측벽과 상기 내측벽에 인접한 상기 내부핀까지의 간격은 상기 내부핀의 폭 대비 1배 이상 2배 이하로 형성되고,상기 복수의 내부핀 상호 간의 이격 간격은 상기 내부핀의 폭 대비 1배 이상 2배 이하로 형성되는 것을 특징으로 하는 제상 장치.
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
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CN201680003731.9A CN107003060B (zh) | 2015-10-21 | 2016-08-01 | 除霜装置和具有该除霜装置的冰箱 |
JP2017520344A JP6484709B2 (ja) | 2015-10-21 | 2016-08-01 | 除霜装置及びそれを備える冷蔵庫 |
EP16857644.5A EP3367025B1 (en) | 2015-10-21 | 2016-08-01 | Defrosting device and refrigerator having same |
EP19211279.5A EP3708933A1 (en) | 2015-10-21 | 2016-08-01 | Defrosting device and refrigerator having the same |
US15/518,502 US10520240B2 (en) | 2015-10-21 | 2016-08-01 | Defrosting device and refrigerator having the same |
Applications Claiming Priority (6)
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KR1020150147011A KR102447835B1 (ko) | 2015-10-21 | 2015-10-21 | 제상 장치 및 이를 구비하는 냉장고 |
KR10-2015-0147011 | 2015-10-21 | ||
KR1020150147012A KR102447836B1 (ko) | 2015-10-21 | 2015-10-21 | 제상 장치 및 이를 구비하는 냉장고 |
KR10-2015-0147010 | 2015-10-21 | ||
KR1020150147010A KR102447834B1 (ko) | 2015-10-21 | 2015-10-21 | 제상 장치 및 이를 구비하는 냉장고 |
KR10-2015-0147012 | 2015-10-21 |
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US (1) | US10520240B2 (ko) |
EP (2) | EP3708933A1 (ko) |
JP (1) | JP6484709B2 (ko) |
CN (1) | CN107003060B (ko) |
WO (1) | WO2017069386A1 (ko) |
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CN108444169A (zh) * | 2018-04-02 | 2018-08-24 | 合肥美的电冰箱有限公司 | 排水器及冰箱 |
US11492126B2 (en) * | 2019-07-31 | 2022-11-08 | B/E Aerospace, Inc. | Restricted space air chiller |
CN112066769A (zh) * | 2020-09-17 | 2020-12-11 | 北京空间飞行器总体设计部 | 非均匀散热的冷凝器和环路热管 |
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Also Published As
Publication number | Publication date |
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CN107003060B (zh) | 2019-09-17 |
CN107003060A (zh) | 2017-08-01 |
US10520240B2 (en) | 2019-12-31 |
EP3367025A4 (en) | 2019-05-22 |
US20180283766A1 (en) | 2018-10-04 |
JP2017534830A (ja) | 2017-11-24 |
JP6484709B2 (ja) | 2019-03-13 |
EP3367025B1 (en) | 2020-03-11 |
EP3367025A1 (en) | 2018-08-29 |
EP3708933A1 (en) | 2020-09-16 |
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