WO2002073106A1 - Refrigerateur - Google Patents
Refrigerateur Download PDFInfo
- Publication number
- WO2002073106A1 WO2002073106A1 PCT/JP2002/002332 JP0202332W WO02073106A1 WO 2002073106 A1 WO2002073106 A1 WO 2002073106A1 JP 0202332 W JP0202332 W JP 0202332W WO 02073106 A1 WO02073106 A1 WO 02073106A1
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- WO
- WIPO (PCT)
- Prior art keywords
- evaporator
- glass tube
- refrigerator according
- heater
- refrigerator
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- 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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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/40—Heating elements having the shape of rods or tubes
- H05B3/42—Heating elements having the shape of rods or tubes non-flexible
- H05B3/44—Heating elements having the shape of rods or tubes non-flexible heating conductor arranged within rods or tubes of insulating material
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/40—Heating elements having the shape of rods or tubes
- H05B3/42—Heating elements having the shape of rods or tubes non-flexible
- H05B3/48—Heating elements having the shape of rods or tubes non-flexible heating conductor embedded in insulating material
- H05B3/50—Heating elements having the shape of rods or tubes non-flexible heating conductor embedded in insulating material heating conductor arranged in metal tubes, the radiating surface having heat-conducting fins
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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
- F25B2400/12—Inflammable refrigerants
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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
- F25D21/14—Collecting or removing condensed and defrost water; Drip trays
-
- 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
- F25D2400/00—General features of, or devices for refrigerators, cold rooms, ice-boxes, or for cooling or freezing apparatus not covered by any other subclass
- F25D2400/04—Refrigerators with a horizontal mullion
-
- 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
- F25D2400/00—General features of, or devices for refrigerators, cold rooms, ice-boxes, or for cooling or freezing apparatus not covered by any other subclass
- F25D2400/24—Protection against refrigerant explosions
Definitions
- FIG. 31 there are a freezer compartment 2 and a refrigerator compartment 3 inside the refrigerator body 1.
- the freezer compartment 2 and the refrigerator compartment 3 are separated by a partition wall 6.
- the freezer compartment 2 is provided with a freezer compartment door 4, and the refrigerator compartment 3 is provided with a refrigerator compartment door 5.
- the suction port 7 sucks the air in the freezer 2.
- the suction port 8 sucks the air in the refrigerator compartment 3.
- the discharge port 9 discharges the cold air into the freezing compartment 2.
- Fan 1 1 circulates cool air.
- the evaporator 10 and the freezer compartment 2 are separated by an evaporator partition wall 12.
- the glass tube for defrosting 15 is composed of a coil of nichrome wire covered with a glass tube.
- the refrigerant flows through the evaporator 10 and the evaporator 10 is cooled.
- the heated air in the cooling room 2 is sent from the suction port 7, and the heated air in the refrigerator room 3 is sent from the suction port 8 to the cooling room 20. So Then, the heated air is heat-exchanged and cooled by the evaporator 10, the cooling air is sent from the discharge port 9 into the freezing compartment 2, and from the freezing compartment 2 through the communication port (not shown). Send cool air to the refrigerator.
- the conventional configuration has the following problems in a refrigeration cycle using a flammable refrigerant. That is, since the flammable refrigerant has relatively large latent heat, defrosting is insufficient in the piping portion of the evaporator 10 where the flammable refrigerant accumulates, and frost remains. As a result, the remaining frost hinders heat transfer and causes uncooling.
- the refrigerator of the present invention solves the above-mentioned problems, and prevents the flammable refrigerant from igniting even if the flammable refrigerant is leaked in an environment where the flammable refrigerant leaks into the installation atmosphere of the defrosting means.
- An object of the present invention is to provide a refrigerator having a defrosting means capable of preventing uncooling due to the remainder.
- FIG. 1 is an explanatory diagram of a refrigeration cycle of a refrigerator according to a first embodiment of the present invention.
- Fig. 3 is a schematic diagram of the main parts of the refrigerator shown in Fig. 2.
- FIG. 5 is a longitudinal sectional view of a main part of a refrigerator according to a second embodiment of the present invention.
- FIG. 8 is a longitudinal sectional view of a main part of a refrigerator according to a fifth embodiment of the present invention.
- FIG. 9 is a longitudinal sectional view of a main part of a refrigerator according to a sixth embodiment of the present invention.
- FIG. 10 is a longitudinal sectional view of a principal part of a refrigerator according to a seventh embodiment of the present invention.
- FIG. 12 is a partial perspective view of a refrigerator according to a ninth embodiment of the present invention.
- Fig. 13 is a front view as seen from B shown in Fig. 12
- FIG. 20 is a partial perspective view of the evaporator and glass tube of the refrigerator according to the 12th embodiment of the present invention.
- Fig. 21 is a front view as viewed from the arrow F shown in Fig. 20.
- FIG. 22 is a partial perspective view of the evaporator and the glass tube heater of the refrigerator according to the thirteenth embodiment of the present invention.
- Figure 23 is an arrow view from G shown in Figure 22
- Figure 24 is an enlarged partial sectional view of the glass tube heater of the refrigerator shown in Figure 22
- FIG. 25 is a refrigeration cycle diagram of a refrigerator according to the 14th embodiment of the present invention.
- the refrigeration cycle 301 is configured by sequentially connecting a compressor 302, a condenser 303, a pressure reducing mechanism 300, and an evaporator 303.
- a flammable refrigerant is sealed in the refrigeration cycle 301.
- a defrosting means 307 is provided near the evaporator 306.
- FIG. 1 A specific configuration of a refrigerator having the refrigeration cycle shown in FIG. 1 will be described with reference to FIGS.
- the refrigerator in the first embodiment includes two glass tube heaters 19a and 19b as a specific example of the defrosting means shown in FIG.
- each heater is provided with a heater wire 24 made of a metal material, for example, nickel chromium, formed in a spiral shape in a glass tube 23.
- the lights 19 a and 19 b are arranged side by side below the evaporator 10.
- One heater 19 a is arranged near the lowest pipe 21 of the evaporator 10.
- the glass tube heaters 19a and 19b are collectively referred to as glass tube heaters. He said, 19.
- the cooling room 20 is equipped with an evaporator 10, a fan 11, a roof 16, a glass tube 19, and the like.
- the pair of holding parts 22 shown in FIG. 3 are provided at both ends of the heater 19, and integrally fix the heaters 19a and 19b.
- the fan 11 stops to remove the frost that has reached the evaporator 10, and the refrigerant circulation in the evaporator 10 stops. Thereafter, the glass tube heater 19 is energized, and the heat generated from the heater 19 removes frost that has reached the evaporator 10.
- the defrosting completion detecting means not shown
- the power supply to the heater 19 is stopped and the defrosting operation ends.
- the stoppage of the fan 11 causes the flammable refrigerant liquid in the evaporator 10 to collect in its lowest amount in the lowest pipe 21 of the evaporator 10 by its own weight. Then, by the operation of the first glass tube 19a, the combustible refrigerant having a large latent heat accumulated in the lowermost pipe 21 in a large amount evaporates in the pipe.
- the heater 19 a since the heater 19 a is located near the lowest pipe 21, the evaporation of a large amount of the flammable refrigerant accumulated inside the pipe below the evaporator 10 is promoted.
- the flammable refrigerant evaporated in this way moves as a high-temperature gas to the pipe above the evaporator 10.
- the high-temperature gas of the combustible refrigerant that has moved to the piping above the evaporator 10 is cooled and liquefied by the piping and fins because the piping above the evaporator 10 is cold due to frost. This high-temperature gas releases heat necessary for liquefaction to the frost above the evaporator 10 to perform defrosting.
- the flammable refrigerant has a large latent heat, a large amount of heat is radiated to the frost to liquefy, so that defrosting is promoted.
- the evaporator 10 is defrosted by the thermosyphon phenomenon.
- the direct heat received from the heater 19 also allows the evaporator 10 and its surrounding parts and As the frost on the walls melts and the surrounding air is heated and convected, defrosting of the entire evaporator 10 is performed.
- the second glass tube heater 19b is arranged below the evaporator 10 in parallel with the heater 19a, so that the input to each glass tube heater is smaller than in the past. can do.
- the surface temperature of the glass tube can be kept below the ignition temperature of the flammable refrigerant, for example, 460 ° C or less when isobutane is used as the flammable refrigerant.
- radiation is proportional to the surface area of the heating element. Therefore, when a plurality of light sources 19 are formed, the heat transfer to the evaporator 10 becomes faster because the surface area is increased as compared with the case where one light source 19 is formed.
- the defrost can be made uniform, the defrost efficiency can be improved, and no frost remains.
- the evaporator 10 and its surroundings are heated by the thermosyphon effect of the flammable refrigerant in the pipe and the direct heat reception of the plurality of heaters 19a and 19b. The whole is uniformly defrosted, the defrosting efficiency is improved, and no frost remains.
- the operation time of each heater 19a, 19b can be shortened.
- the refrigerator according to the first embodiment is provided with a plurality of glass tube heaters as defrosting means for defrosting the evaporator, so that the temperature at the time of energization in each glass tube heater is flammable.
- the temperature can be reduced so as to be lower than the ignition temperature of the refrigerant. That is, defrosting can be performed at a temperature lower than the ignition temperature of the flammable refrigerant while maintaining the defrosting ability at the same level as before. Therefore, even if defrosting is performed in an environment where the flammable refrigerant has leaked into the atmosphere in which the defroster is installed, it prevents ignition of the flammable refrigerant and prevents uncooling due to residual frost. can do. (Second embodiment)
- FIG. 5 is a longitudinal sectional view of a main part of a refrigerator according to a second embodiment of the present invention.
- the second embodiment differs from the first embodiment in the following points.
- a plurality of glass tube heaters are arranged at positions facing each other across the evaporator 10. That is, a first glass tube heater 25 a is installed below the evaporator 10, and a second glass tube heater 25 is installed above the evaporator 10. The heater 25 b is installed near the accumulator 18.
- the largest amount of the flammable refrigerant liquid in the evaporator 10 accumulates in the lowest pipe 21 of the evaporator 10 due to its own weight. Then, by the operation of the heater 25a, the refrigerant liquid near the lowest pipe evaporates in the pipe and moves to the pipe above the evaporator 10. The high-temperature gas of the flammable refrigerant that has moved to the upper piping is cooled and liquefied by the piping and fins. The high-temperature gas releases the heat necessary for the liquid to the frost formed on the upper part of the evaporator 10, thereby performing defrosting. Then, the liquefied refrigerant defrosts the entire evaporator by repeating the thermosiphon phenomenon returning to the lowest pipe 21 again.
- the plurality of glass tube heaters are arranged above and below the evaporator, which is a position facing each other across the evaporator. Can be efficiently heated. Since the calorific value of each glass tube heater can be reduced, the surface temperature can be kept below the ignition temperature of the flammable refrigerant. In addition, defrosting can be made uniform and defrosting efficiency improves, leading to energy savings. In addition, the accumulator placed above the evaporator can be reliably defrosted, and no frost remains.
- the second glass tube may be disposed in the vicinity. Furthermore, it is possible to install a glass tube over the evaporator opposite to the front and back of the evaporator. In this case, the defrost water of the evaporator 10 is supplied to the glass tube over 25a.
- the roof 16 can be omitted because it is not directly applied.
- FIG. 6 is a longitudinal sectional view of a main part of a refrigerator according to a third embodiment of the present invention.
- the third embodiment differs from the above embodiments in the following points.
- a first glass tube heater 26 a is provided below the evaporator 10, and a second glass tube heater 26 b is provided in the middle of the evaporator 10. The operation of the refrigerator configured as described above will be described.
- the heater 26b is energized while the heater 26b is energized.
- the heat generated by the current flow of 26a is mostly radiant heat and directly heats the evaporator 10.
- the air heated by the heat transfer from the glass tube surface of the heater 26a is warmed and moves upward along the evaporator 10 as a rising airflow.
- the temperature of the evaporator 10 and the frost adhering to the evaporator 10 is increased.
- the evaporator 10 is sequentially heated from the lower part to the upper part.
- the heater 26 b provided in the middle part of the evaporator 10 can heat a part where the temperature rises slowly from the middle part to the upper part of the evaporator 10.
- the upward heat of the radiant heat can directly heat the evaporator 10.
- the downward heat once hitting the tub 13 and being reflected, heats the evaporator 10.
- the heater 26 b is provided in the middle of the evaporator 10, so that the evaporator 10 can be directly heated in the vertical direction or the front-back direction. Therefore, since the defrosting of the evaporator can be performed quickly and uniformly, the surface temperature of the glass tube heater can be suppressed to the ignition temperature of the combustible refrigerant or lower.
- FIG. 7 is a longitudinal sectional view of a main part of a refrigerator according to a fourth embodiment of the present invention.
- the fourth embodiment differs from the above embodiments in the following points.
- the first glass tube heater 27 a is installed below the evaporator 10, while the second glass tube heater 27 b is installed either before or after the evaporator 10. .
- a notch 28 is provided in a part of the fin of the evaporator 10 for installing the heater 27 b. Further, the capacity of the heater 27a disposed below the evaporator 10 is set to be larger than that of the heater 27b disposed above it.
- the heater 27a and the heater 27b When the heater 27a and the heater 27b are energized during defrosting, the heater 27a provided below the evaporator 10 performs defrosting from the lower part of the evaporator 10.
- Evaporator to 10 The evaporator part, whose temperature rises slowly due to the thermosiphon effect in the evaporator 10, is heated by the heater 27b provided either before or after the evaporator 10 to efficiently remove frost adhering to the evaporator 10 be able to.
- the capacity of the heater 27a located below the evaporator 10 is set to be larger than that of the heater 27b located above it, so that the lower part of the evaporator where frost adheres the most is surely. Defrosting can be performed, and more efficient defrosting can be performed.
- the defrosting of the evaporator 10 can be performed more quickly and uniformly, so that the surface temperature of the glass tube heaters 27a and 27b can be suppressed to the ignition temperature of the combustible refrigerant or lower.
- the defrosting device even if defrosting is performed in an environment where the flammable refrigerant leaks into the atmosphere where the defrosting device is installed, it is possible to prevent the flammable refrigerant from igniting and prevent uncooling due to residual frost. .
- a notch 28 is provided in a part of the fin of the evaporator 10, and the heater 27 b disposed in front of or behind the evaporator 10 is arranged in the notch 28. Since it is installed, the ineffective space for installing the heater 27 b can be reduced.
- the defrosted water adhering to the evaporator 10 is less likely to be applied to the heater 27b.
- FIG. 8 is an enlarged view of a main part of a refrigerator according to a fifth embodiment of the present invention.
- the fifth embodiment differs from the above embodiments in the following points.
- a temperature sensor 29 detects the surface temperature of the glass tube heater 19.
- the control means 30 performs ON / OFF control of the voltage application to the heater 19.
- Heater wires 31 are provided inside the heater 19.
- the refrigerator configured as described above will be described.
- power is supplied to the heater wire 31 inside the heater 19.
- the temperature sensor 19 that detects the surface temperature of the glass tube and the control means 30 control ON / OFF of the voltage applied to the heater 19 to ensure that the surface temperature of the heater 19 is flammable.
- Defrosting is performed while controlling the temperature below the ignition temperature of the refrigerant.
- a flammable refrigerant R600a (isobutane) and the like are known, and its ignition temperature is 460 ° C, and the surface temperature of the heater 19 is lower than the ignition temperature of the flammable refrigerant, for example, 450 ° C.
- Defrosting is performed by controlling the energization time so as to keep the temperature at or below ° C.
- the flammable refrigerant leaks into the atmosphere where the defrosting unit is installed. Even if defrosting is performed in a degraded environment, ignition of the flammable refrigerant can be prevented.
- FIG. 9 is an enlarged view of a main part of a refrigerator according to a sixth embodiment of the present invention.
- the sixth embodiment differs from the above embodiments in the following points.
- the temperature sensor 29 detects the surface temperature of the glass tube heater 19.
- the control means 32 is a control means for controlling the applied voltage of the heater 19 in level.
- Heater wire 31 is provided inside the heater 19.
- the heater wire 31 inside the heater 19 is energized.
- the temperature sensor 29 for detecting the surface temperature of the glass tube and the control means 32 control the applied voltage to the heater 19 to control the surface temperature of the heater 19 to be lower than the ignition temperature of the flammable refrigerant. Defrosting is performed while doing so.
- a flammable refrigerant R600a (isobutane) and the like are known, and its ignition temperature is 460 ° C, and the surface temperature of the heater 19 is set to, for example, 45 ° C, which is lower than the ignition temperature of the flammable refrigerant. High / low control of applied voltage to keep below 0 ° C To perform defrost.
- the flammable refrigerant leaks into the atmosphere where the defrosting unit is installed. Even if defrosting is performed in a degraded environment, ignition of the flammable refrigerant can be prevented. Furthermore, by controlling the applied voltage level, the temperature change of the heating wire can be reduced, and disconnection can be prevented, so that ignition due to sparks generated at the time of disconnection can also be prevented.
- FIG. 10 is a sectional view of a main part of a refrigerator according to a seventh embodiment of the present invention.
- the refrigerator main body 101 includes an outer box 102, an inner box 103, and a rigid polyurethane foam insulation material 1 that is integrally filled and foamed between the outer box 102 and the inner box 103. 0 4.
- the refrigerator compartment 105 and the freezer compartment 106 are separated by a partition wall 107.
- the evaporator 108 is attached to the back of the freezer 106.
- the polystyrene foam 109 is arranged on the front of the evaporator 108 and insulates the room accommodating the evaporator 108 from the freezer compartment 106.
- a resin-molded decorative board 110 is attached to the outside of the polystyrene foam 109.
- the makeup plate 110 has a cool air outlet 111 formed in the body.
- a cool air suction port 112 is provided between the lower end face of the decorative plate 110 and the inner box 103.
- the fan motor 113 for stirring the cool air is attached to a part of the decorative board 110.
- the fan motor 113 discharges the cool air cooled by the evaporator 108 to the freezer room 106 and to a room (not shown) in another temperature zone.
- the defrost water tray 111 is located below the evaporator 108.
- the opening on the upper surface of the water tray 114 is slightly larger than the outer shape of the lower surface of the evaporator 108.
- the glass tube heater 115 is mounted between the evaporator 108 and the water tray 114.
- Evaporator 1 08 evaporation The pipe 1 16 and the fins 1 17 are fixed by press fitting or caulking.
- the evaporating dish 1 19 is disposed below the water receiving dish 1 14 and stores defrosted water dropped on the water receiving dish 1 14.
- the heat radiating pipe 120 is arranged in the evaporating dish 119, and heats and evaporates the defrost water accumulated in the evaporating dish 119.
- the outer wall of Hi-Ichi 115 and the end face of Fin 117 are always in contact.
- the fins 1 17 are constituted by continuous fins connected in the vertical direction. Also, a Ni-Cr line is used for the heater resistance wire of the heater 115.
- the cool air cooled by the evaporator 108 is discharged from the cool air outlet 111 by the fan motor 113, exchanges heat in the freezer 106, and evaporates from the cool air inlet 112. Return to 08.
- This circulation operation is repeated to cool the freezer compartment 106 to a predetermined temperature.
- part of the cool air cooled by the evaporator 108 is sent to a refrigerator room 105 or a room (not shown) in another temperature zone via a duct and a damper (not shown). They are cooled to a predetermined temperature.
- frost gradually adheres to the evaporator 108, and the heater 115 is periodically energized and defrosted before the flow of cool air is hindered by the frost.
- the defrosted water accumulates in the evaporating dish 1 19 via the water receiving dish 1 14 and is evaporated by the heat of the heat radiation pipe 120.
- the flammable refrigerant is sealed in a refrigeration cycle in which a compressor, a condenser, a pressure reducing mechanism, and an evaporator are sequentially connected. Since the heaters 115 and the ends of the fins 108 were brought into contact, in addition to defrosting using radiant heat from the heaters 115, defrosting by heat conduction from the heaters 115 The effect is added, and the defrosting efficiency is improved. At the same time, due to the heat radiation effect by the heat conduction to the fins 108, the surface temperature of the glass tube of the heater 115 can be lowered without changing the amount of heat generated from the heater 115.
- the surface temperature of It can be kept below the deposition temperature (for example, the ignition temperature of isobutane is 460 ° C). Therefore, even if the flammable refrigerant leaks into the storage, there is no risk of ignition.
- the fins 117 provided in the evaporator 108 are constituted by continuous fins that are continuous in the vertical direction, the heat radiation effect by heat conduction to the fins 117 is further enhanced, and the defrosting efficiency is improved. .
- the surface temperature of the heat exchanger 115 can be lowered without changing the heat generation amount, and the ignition temperature of the combustible refrigerant can be kept below the ignition temperature.
- the heater resistance wire of the heater 115 uses a Ni-Cr wire, even if the Hi-Isu wire is used at a low temperature, even if the temperature of the heater is low, it can be maintained at 470 ° C with Fe-Cr. The breakage of the heater wire can be prevented without causing the brittleness of the resistance wire for the night before and after.
- FIG. 11 is a sectional view of a main part of a refrigerator according to an eighth embodiment of the present invention.
- the eighth embodiment differs from the seventh embodiment in the following points.
- a plurality of fins 121 are formed in a semicircular notch along the outer wall of the glass tube heater 115.
- Part 1 2 2 is provided.
- the notch 1 2 2 is in continuous contact with the outer wall of the night 1 1 5.
- FIG. 12 is a partial perspective view of a refrigerator according to a ninth embodiment of the present invention
- FIG. 13 is a front view taken along the arrow B shown in FIG. 12
- FIG. 14 is a ninth embodiment of the present invention.
- Fig. 15 is a partial perspective view of another evaporator and a glass tube of the refrigerator, and Fig. 15 is a front view as viewed from an arrow C shown in Fig. 14.
- each fin 123 has an L-shaped bent portion 124 at the lower end of the fin.
- Each of the bent portions 124 is in contact with the outer wall of the glass tube heater 115.
- a gap 125 is provided between the end face of the bent portion 124 and the adjacent fin.
- each fin 1 26 has a semicircular cutout 127 along the outer wall of the glass tube 115 at the end. You may comprise so that it may have the bending part 128 bent in the shape. The operation of the refrigerator configured as described above will be described.
- each fin 1 2 3 is bent in an L-shape along the outer wall of the fin 1 1 5, so that the contact portion between each fin 1 2 3 and the heater 1 15 is It becomes linear and heat conduction efficiency can be improved. Further, since there is a gap 125 between the end face of the bent portion 124 and the adjacent fin, radiant heat from the heater 115 can be transmitted upward.
- each of the fins 126 has a notch 1 27 formed in a semicircular shape along the outer wall of the heater 115 at the end thereof. Since it has the bent portion 128 bent in a shape, the contact portion between each fin 123 and the heater 115 becomes planar, so that the heat conduction efficiency can be further improved.
- FIG. 16 is a partial perspective view of the evaporator and the glass tube heater of the refrigerator according to the tenth embodiment of the present invention
- FIG. 17 is a front view as viewed from an arrow D shown in FIG. .
- both ends of the glass tube heater 115 are fixed by fixing portions 129.
- the fixing portion 129 is formed by cutting out a part of a vertical flange 133 of a side plate 130 provided on a side surface of the evaporator. Then, the end of each fin 1 17 is in contact with the outer wall of the fin 1 15 while the fin 1 15 is fixed to the fixing portion 1 29.
- the fixing section 1 2 9 is formed by cutting out a part of the vertical flange 1 3 1 of the side plate 1 3 0 provided on the side of the evaporator. 15 does not fall down. Therefore, the assembling can be performed at a low cost without the need for a special fixing member, and the contact between the heater 115 and each of the fins 117 can be always maintained in a stable dimensional relationship, and stable heat conduction can be secured. As a result, the defrosting effect is improved, and the surface temperature of the heat exchanger 115 can be lowered without changing the calorific value, so that the ignition temperature of the combustible refrigerant can be kept below the ignition temperature.
- FIG. 18 is a partial perspective view of the evaporator and the glass tube heater of the refrigerator according to the eleventh embodiment of the present invention
- FIG. 19 is a front view as viewed from E in FIG.
- a shielding plate 13 2 is provided between the evaporator 108 and the glass tube heater 115.
- the fins 1 17 are arranged such that the upper surface of the shield plate 13 and the lower end 13 3 of each fin 1 17 are in contact with each other. Both ends 1 3 4 of the shielding plate 1 3 2 are integrally attached to both end fins 1 35 by caulking or the like.
- the heat generated by the heater 115 is transferred to the shield plate 132. Wrong. Since the upper surface of the shielding plate 13 and the lower end 13 of each fin 11 17 are in contact with each other, the heat of the heater 1 15 can be radiated to the fin 1 17 via the shielding plate 13 2. Therefore, the surface temperature of the heat exchanger 115 can be kept below the ignition temperature of the flammable refrigerant without changing the calorific value. Further, the defrosted water that has melted out of the evaporator 108 drops on the shielding plate 132. This shield plate prevents the defrost water from the evaporator from dropping directly onto the heater, and is generated when the defrost water touches the heater and evaporates rapidly. Sounds (such as jiyun, jiyun) can be prevented.
- FIG. 20 is a partial perspective view of the evaporator and the glass tube heater of the refrigerator according to the 12th embodiment of the present invention
- FIG. 21 is a front view seen from the arrow F shown in FIG. .
- each long fin 1336 has an L-shaped bent portion 138 at the lower end of the fin.
- Each bend 1338 is in contact with the outer wall of the glass tube heater 115.
- Each of the short fins 13 7 has a lower end face shorter than the long fins 13 6. The dimension a between the two long fins 13 6 is set wider than the dimension b between the long fin 13 6 and the short fin 13 7.
- each long fin 13 6 is bent in an L shape along the outer wall of the heater 11, the contact portion between each long fin 13 and 6 The heat transfer efficiency from the heater 1 15 to the long fins 13 6 can be improved.
- the length of the long fins 13 6 and short fins 13 7 that make up the evaporator is larger than that of the upper fin (a> b). Is not biased to the bottom. As a result, frost formation becomes uniform throughout the evaporator, and the defrost cycle can be set longer. As a result, there is an advantage that the amount of power consumption required for defrosting can be reduced and energy can be saved. (Third Embodiment)
- FIG. 22 is a partial perspective view of the evaporator and the glass tube heater of the refrigerator according to the thirteenth embodiment of the present invention
- FIG. 23 is a view seen from an arrow G shown in FIG.
- FIG. 2 is an enlarged partial sectional view of a glass tube heater of the refrigerator shown in FIG.
- the glass tube heater 1 39 having a double structure is constituted by an inner tube 140 and an outer tube 141.
- An outer tube 141 is arranged at a predetermined distance from an outer wall of the inner tube 140, and a resistance wire 144 is provided inside the inner tube 140. Then, both ends of both pipes are fixed integrally by caps 142 while maintaining predetermined dimensions.
- the outer tube 14 1 of the heater 13 9 and the lower end of each fin 11 17 are always in contact.
- the heater 139 When the heater 139 is energized, the heat generated from the resistance wire 144 is generated from the surface of the outer tube 141 from the inner tube 140 via the outer tube 141. At this time, the surface temperature of the outer tube 141 becomes lower than that of the inner tube 140 due to the heat insulation effect of the space between the inner tube 140 and the outer tube 141. Therefore, the defrosting effect is improved, and the surface temperature of the heater 115 can be reduced without changing the heat generation amount, and the ignition temperature of the combustible refrigerant can be maintained at or below.
- the end faces of the heat sinks 13 and 9 are fixed with the integrally molded caps 14 and 2, the gap size in the double glass tube can be secured correctly, the variation in the surface temperature of the glass tube can be reduced, and assembly is easy. Become.
- FIG. 25 is a refrigeration cycle diagram of a refrigerator according to a 14th embodiment of the present invention
- FIG. 26 is a partial sectional view of a glass tube heater of the refrigerator.
- the refrigeration cycle 201 is composed of a compressor 202, a condenser 203, An evaporator 204 and an evaporator 206 are sequentially connected to each other, and a flammable refrigerant is sealed therein.
- the glass tube 200 which is a defrosting means, is disposed below the evaporator 206 and periodically defrosts the frost attached to the evaporator 206.
- a sealing member 208 has an inner tube supporting portion 209 and an outer tube supporting portion 210 integrally formed of a rubber member, and an inner tube 2 serving as a glass tube having a multiplex structure. It supports the end of 11 and the end of outer tube 2 12 respectively.
- the heater wire 2 13 is made of a material such as iron-chromium or nickel-chromium, and is arranged inside the inner pipe 211 with a predetermined gap from the inner wall of the inner pipe 211.
- the connection part 214 crimps the heater wire 212 and the lead wire 215.
- the lead wire 215 is led out below the side surface of the sealing member 208 or outside from the bottom surface.
- FIG. 27 is a partial sectional view of another glass tube of the refrigerator according to the fourteenth embodiment of the present invention.
- the sealing member 2 16 has an inner tube supporting portion 2 17 and an outer tube supporting portion 2 18 integrally formed of a rubber member.
- the inner pipe support portion 217 is wrapped by the length c between the inner pipe 219 and the wrap portion 221 to support the inner pipe 219.
- the outer tube supporting portion 218 wraps the outer tube 222 and the wrap portion 222 for a length d to support the outer tube 220.
- the tip end surface 2 2 4 (I surface) of the wrap portion 2 22 is located outside the tip end surface 2 2 3 (H surface) of the wrap portion 2 21.
- the heater 207 is constituted by a glass tube having a multi-layer structure.
- the heating value of the heater 207 is the same as before, but the outer tube 2 is formed by the heat insulation effect of the space between the inner tube 211 and the outer tube 212.
- the surface temperature of 12 can be kept below the ignition temperature of the flammable refrigerant (for example, 450 ° C. for isobutane).
- the sealing member 208 is provided on the end face of the glass tube, the positioning of the double-structured glass tube is ensured, the gap size of the glass tube can be secured correctly, and the variation of the surface temperature of the glass tube can be reduced. Can be smaller. Further, the inner tube support portion 209 and the outer tube support portion 210 provided integrally with the sealing member 208 can suppress the inflow of outside air into the glass tube, and the flammable refrigerant is leaked by any chance. Even so, the possibility of ignition can be suppressed.
- the sealing member 2 16 has the inner tube supporting portion 2 17 and the outer tube supporting portion 2 18 integrally formed, so that the cost can be reduced and the dimensional variation during assembly is reduced. it can. Furthermore, the inner tube support 217 and the outer tube support 218 have wraps 221 and 222 at the ends of the outer wall of the glass tube, respectively, so that outside air can be prevented from flowing into the glass tube. It can be suppressed reliably.
- the inner tube 2 19 emits radiation.
- the radiated heat is less likely to be hindered by the outer tube support portion 218. This allows efficient defrosting, and facilitates insertion of the outer tube 220 into the sealing member 2 16, thereby improving assemblability.
- the sealing member is made of rubber in the fourteenth embodiment, the same effect can be obtained by using a heat-resistant material.
- FIG. 28 is a partial sectional view C of a glass tube heater of a refrigerator according to a fifteenth embodiment of the present invention.
- the sealing member 225 has an inner tube supporting portion 222 and an outer tube supporting portion 227 integrally formed of a rubber member.
- the inner pipe support 2 2 6 The wrap portion 230 wraps the length e to support the inner tube 228.
- Reference numeral 27 also wraps the outer tube 2 229 and the wrap portion 2 3 1 by the same length e to support the outer tube 229. Then, the tip surface 2 3 3 (J surface) of the wrap portion 2 3 1
- the inner tube 228 and the outer tube 229 have the same dimensions, and the glass tube end faces are located on the same plane (K plane). The operation of the refrigerator configured as described above will be described.
- the glass tube is composed of an inner tube 228 and an outer tube 229, and a wrapping end surface 233 of the outer tube supporting portion of the sealing member 225 and a wrapping end of the inner tube supporting portion.
- the surface 2 32 is located on the same plane.
- the inner tube support portion 226 and the outer tube support portion 227 are sealed with the same wrap margin, a sufficient wrap margin e can be secured for each tube, and the sealing performance inside and outside the glass tube is improved. It will be good. Therefore, the inflow of outside air into the glass tube can be reliably suppressed, and the possibility of ignition can be suppressed even if the flammable refrigerant leaks. Further, since the inner tube 228 and the outer tube 229 have the same dimensions, the manufacturing process of the glass tube is simplified, and the manufacturing of the glass tube is facilitated.
- FIG. 29 is a partial sectional view of the glass tube heater of the refrigerator according to the sixteenth embodiment of the present invention.
- the sealing member 234 is composed of a plurality of supporting members. That is, the sealing member 234 has the inner tube supporting member 235 and the outer tube supporting member 236 as separate structures.
- the inner pipe support portion 237 provided on the inner pipe support member 235 supports the outer wall end of the inner pipe 239.
- the outer tube support portion 238 provided on the outer tube support member 236 supports an outer wall end of the outer tube 240.
- the outer pipe support member 236 is press-fitted to a part of the outer shell of the inner pipe support member 235.
- the inner tube support member 235 is formed from a material having high heat resistance, and the outer tube support member 236 is more resistant than the inner tube support member 235. Molded from low heat material.
- the inner pipe supporting member 235 and the outer pipe supporting member 236 have a separate structure, so that different materials can be combined at the time of manufacturing. Design flexibility increases.
- the inner pipe support member 2 35 is formed from a material having high heat resistance, and the outer pipe support member 2 35
- the sealing member 36 is made of a material with lower heat resistance than the inner tube support member 235, so that the reliability of the sealing member is improved and the use of materials with high heat resistance, which is costly, is reduced. The cost of the sealing member can be reduced.
- FIG. 30 is a partial sectional view of a glass tube heater of a refrigerator according to a seventeenth embodiment of the present invention.
- Length of 4 4 and wrap portion 2 4 6 Wrap by f and support inner tube 2 4 4.
- the outer tube support portion 243 is wrapped by the length g in the outer tube 245 and the wrap portion 247 to support the outer tube 245.
- the (M surface) is located on the inner side than the distal end surface 248 (L surface) of the wrap portion 246 of the inner tube support portion 242.
- the glass tube heater is arranged such that the wrapped end surface 249 of the outer tube support portion 243 is positioned inside the wrapped end surface 248 of the inner tube support portion 242, the outer tube The lap allowance g of 5 can be sufficiently secured, and the sealing performance inside and outside the glass tube is improved. Therefore, the inflow of outside air into the glass tube can be reliably suppressed, making it flammable Even if the refrigerant leaks, the possibility of ignition can be suppressed.
- the wrap margin f of the wrap portion 246 of the inner tube support portion 242 can be made relatively small, the heat effect of the radiation from the heater wire 213 can be reduced.
- the rise in temperature of the inner tube support due to radiant heat can be suppressed. Therefore, the material of the sealing member 241 does not need to be specially made of a high heat-resistant grade, and cost can be reduced.
- the refrigerator of the present invention includes a plurality of glass tube heaters as defrosting means for an evaporator of a refrigeration cycle in which a flammable refrigerant is sealed. Then, the glass tube heater controls the energizing time or the applied voltage so as to be lower than the ignition temperature of the combustible coolant. Thereby, the ignition of the combustible refrigerant can be prevented, and the uncooled due to the remaining frost can be prevented. Also, the glass tube heater is brought into contact with the fins of the evaporator to lower the surface temperature of the glass tube heater. Further, the glass tube heater has a multi-layered structure, and a sealing member is provided on an end face. Thus, even if defrosting is performed in an environment where the flammable refrigerant has leaked, ignition can be prevented.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Defrosting Systems (AREA)
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP02705107A EP1369650B1 (en) | 2001-03-13 | 2002-03-13 | Refrigerator |
DE60232715T DE60232715D1 (de) | 2001-03-13 | 2002-03-13 | Kühlvorrichtung |
KR1020037011895A KR100600185B1 (ko) | 2001-03-13 | 2002-03-13 | 냉장고 |
HK05107788A HK1075696A1 (en) | 2001-03-13 | 2005-09-05 | Refrigerator |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2001069976A JP2002267331A (ja) | 2001-03-13 | 2001-03-13 | 冷蔵庫 |
JP2001-69976 | 2001-03-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2002073106A1 true WO2002073106A1 (fr) | 2002-09-19 |
Family
ID=18927930
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2002/002332 WO2002073106A1 (fr) | 2001-03-13 | 2002-03-13 | Refrigerateur |
Country Status (8)
Country | Link |
---|---|
EP (2) | EP1369650B1 (ja) |
JP (1) | JP2002267331A (ja) |
KR (1) | KR100600185B1 (ja) |
CN (3) | CN100439831C (ja) |
DE (1) | DE60232715D1 (ja) |
HK (1) | HK1075696A1 (ja) |
TW (1) | TW539838B (ja) |
WO (1) | WO2002073106A1 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2004055457A1 (ja) * | 2002-12-16 | 2004-07-01 | Matsushita Refrigeration Company | 除霜用ヒータとそれを用いた冷却装置 |
CN100362297C (zh) * | 2004-08-25 | 2008-01-16 | 日立空调·家用电器株式会社 | 冰箱 |
CN100400992C (zh) * | 2003-10-23 | 2008-07-09 | 松下电器产业株式会社 | 除霜加热器 |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3580307B2 (ja) * | 2003-02-20 | 2004-10-20 | 松下電器産業株式会社 | 除霜ヒーター |
JP2005134030A (ja) * | 2003-10-30 | 2005-05-26 | Matsushita Electric Ind Co Ltd | 冷蔵庫 |
JP2006343089A (ja) * | 2005-05-12 | 2006-12-21 | Matsushita Electric Ind Co Ltd | 除霜装置付き冷却器と除霜装置付き冷却器を備えた冷蔵庫 |
CN102317717B (zh) * | 2009-02-12 | 2013-10-09 | 松下电器产业株式会社 | 冰箱 |
JP5025689B2 (ja) * | 2009-06-26 | 2012-09-12 | 三菱電機株式会社 | 冷蔵庫 |
DE102010003833A1 (de) * | 2010-04-09 | 2011-10-13 | BSH Bosch und Siemens Hausgeräte GmbH | Abtauheizung für ein Kältegerät |
JP5868034B2 (ja) * | 2011-06-07 | 2016-02-24 | 株式会社東芝 | 冷蔵庫 |
JP6026966B2 (ja) * | 2013-06-28 | 2016-11-16 | アクア株式会社 | 冷蔵庫 |
JP5752199B2 (ja) * | 2013-09-13 | 2015-07-22 | 株式会社Uacj | 冷凍冷蔵庫の熱交換装置 |
CN103851851B (zh) * | 2013-11-07 | 2016-09-07 | 海信(山东)冰箱有限公司 | 一种带有加湿功能的风冷冰箱及其控制方法 |
KR101728388B1 (ko) * | 2014-12-15 | 2017-04-19 | 엘지전자 주식회사 | 제상장치를 구비한 냉장고 |
CN106247742B (zh) * | 2016-08-12 | 2018-09-18 | 长虹美菱股份有限公司 | 一种冰箱冷冻风扇化霜装置及其控制方法 |
KR102204008B1 (ko) * | 2016-11-30 | 2021-01-18 | 엘지전자 주식회사 | 냉장고 |
WO2020093114A1 (pt) * | 2018-11-07 | 2020-05-14 | Da Gragnano Bruno | Sistema e método automático para economia de energia de acordo com condições ambientes e outros parâmetros técnicos para ser utilizado em sistemas com resistências para aquecimento de vidros de expositores comerciais refrigerados ou congelados |
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JP2000121235A (ja) * | 1998-10-20 | 2000-04-28 | Matsushita Refrig Co Ltd | 冷蔵庫 |
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US4091637A (en) * | 1976-10-13 | 1978-05-30 | Mcquay-Perfex, Inc. | Electric defrost heater for fin and tube refrigeration heat exchanger |
JPS5828908B2 (ja) * | 1978-11-24 | 1983-06-18 | 株式会社東芝 | 冷蔵庫 |
JPS589911B2 (ja) * | 1978-11-29 | 1983-02-23 | 株式会社日立製作所 | 冷凍機用蒸発器 |
JPH06313664A (ja) * | 1993-04-28 | 1994-11-08 | Mitsubishi Electric Corp | 冷蔵庫の除霜用ヒータ |
JP3404299B2 (ja) * | 1998-10-20 | 2003-05-06 | 松下冷機株式会社 | 冷蔵庫 |
-
2001
- 2001-03-13 JP JP2001069976A patent/JP2002267331A/ja active Pending
-
2002
- 2002-03-12 TW TW091104619A patent/TW539838B/zh not_active IP Right Cessation
- 2002-03-13 KR KR1020037011895A patent/KR100600185B1/ko not_active IP Right Cessation
- 2002-03-13 CN CNB2006101592929A patent/CN100439831C/zh not_active Expired - Fee Related
- 2002-03-13 EP EP02705107A patent/EP1369650B1/en not_active Expired - Lifetime
- 2002-03-13 EP EP07001116.8A patent/EP1793186B1/en not_active Expired - Lifetime
- 2002-03-13 CN CNB2006101592948A patent/CN100513949C/zh not_active Expired - Fee Related
- 2002-03-13 CN CNB028065700A patent/CN1327177C/zh not_active Expired - Fee Related
- 2002-03-13 WO PCT/JP2002/002332 patent/WO2002073106A1/ja active Application Filing
- 2002-03-13 DE DE60232715T patent/DE60232715D1/de not_active Expired - Lifetime
-
2005
- 2005-09-05 HK HK05107788A patent/HK1075696A1/xx not_active IP Right Cessation
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JPS597383U (ja) * | 1982-07-05 | 1984-01-18 | 三菱電機株式会社 | 冷蔵庫 |
JPS5916971U (ja) * | 1982-07-22 | 1984-02-01 | 三菱電機株式会社 | 冷蔵庫 |
JPH0310185U (ja) * | 1989-06-14 | 1991-01-30 | ||
JPH0427372U (ja) * | 1990-06-26 | 1992-03-04 | ||
JPH11257831A (ja) * | 1998-03-13 | 1999-09-24 | Toshiba Corp | 冷蔵庫 |
JP2000121235A (ja) * | 1998-10-20 | 2000-04-28 | Matsushita Refrig Co Ltd | 冷蔵庫 |
JP2000266450A (ja) | 1999-03-18 | 2000-09-29 | Matsushita Refrig Co Ltd | 冷蔵庫 |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2004055457A1 (ja) * | 2002-12-16 | 2004-07-01 | Matsushita Refrigeration Company | 除霜用ヒータとそれを用いた冷却装置 |
CN100400992C (zh) * | 2003-10-23 | 2008-07-09 | 松下电器产业株式会社 | 除霜加热器 |
CN100362297C (zh) * | 2004-08-25 | 2008-01-16 | 日立空调·家用电器株式会社 | 冰箱 |
Also Published As
Publication number | Publication date |
---|---|
CN1940419A (zh) | 2007-04-04 |
CN1620585A (zh) | 2005-05-25 |
CN100439831C (zh) | 2008-12-03 |
EP1369650B1 (en) | 2009-06-24 |
EP1369650A1 (en) | 2003-12-10 |
EP1369650A4 (en) | 2006-04-26 |
EP1793186B1 (en) | 2015-09-09 |
EP1793186A3 (en) | 2012-06-13 |
CN1327177C (zh) | 2007-07-18 |
TW539838B (en) | 2003-07-01 |
CN100513949C (zh) | 2009-07-15 |
CN1945177A (zh) | 2007-04-11 |
KR100600185B1 (ko) | 2006-07-12 |
EP1793186A2 (en) | 2007-06-06 |
DE60232715D1 (de) | 2009-08-06 |
KR20030094279A (ko) | 2003-12-11 |
HK1075696A1 (en) | 2005-12-23 |
JP2002267331A (ja) | 2002-09-18 |
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