JP2005180720A - Refrigerator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a refrigerator of which energy-saving effect is enhanced by not providing a radiator pipe, which becomes a heat load inside the refrigerator, at a front face opening part of the refrigerator. <P>SOLUTION: To restrict intrusion of heat load into the refrigerator, a front capacitor for dew condensation prevention is not provided at the front opening part of a refrigerator main body 17, heat load by the radiation pipe to inside of the refrigerator is eliminated and energy-saving effect is enhanced. In addition, as restriction of transmission of cool air in the refrigerator to a front panel is enabled and heat of outside of the refrigerator is conducted to a front face part 38 to raise its surface temperature by providing a protruding part 39, dew condensation can be prevented. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a heat insulating configuration around a partition body that partitions the inside of a refrigerator.

In recent years, refrigerators have been provided with at least two storage chambers such as a refrigerator and a freezer compartment, and a front plate is provided on the front face of a partition that partitions the storage compartments. As a conventional refrigerator of this type, there is a refrigerator in which the front plate surface is prevented from being exposed by heat conduction of a heat radiating pipe of a refrigeration cycle. (For example, see Patent Document 1)
Hereinafter, the conventional refrigerator will be described with reference to the drawings.

  FIG. 10 is a longitudinal sectional view of a conventional refrigerator. FIG. 11 is a perspective view of a refrigeration cycle piping of a conventional refrigerator. FIG. 12 is a cross-sectional view of a conventional refrigerator partition.

  In FIG. 10, the refrigerator main body 1 is divided into a drawer-type freezer compartment 4 in the center, a refrigerator compartment 5 in the upper part, and a drawer-type vegetable compartment 6 in the lower part by an upper partition 2 and a lower partition 3. Further, the freezer compartment 4 is formed as a two-stage drawer type freezer compartment by the central partition 7. The low temperature chamber 8 provided at the bottom of the refrigerator compartment 5 is maintained at a partial freezing temperature of about −3 ° C.

  In FIG. 11, the refrigeration cycle includes a compressor 9, a side condenser 10, a front condenser 11, and a capillary tube 12. The cool air cooled by the cooler 13 is blown into the chambers by the blower 14.

  Next, the structure inside the partition will be described taking the central partition 7 as an example. In FIG. 12, the front plate 15 has a U-shaped cross section in which bent portions are formed vertically, and the U-shaped inside. Is provided with a heat radiating pipe 16 forming a part of the front capacitor 11. The front plate 15 is made of a material having good thermal conductivity such as an iron plate, and is arranged in contact with the heat radiating pipe 16 so as to exchange heat. Moreover, 16a inserts the heat insulating material 16a, such as a polystyrene foam and a flexible foam, in the internal space of the partition body 7. FIG.

  About the refrigerator comprised as mentioned above, the operation | movement is demonstrated below. The refrigerant compressed by the compressor 9 enters the front condenser 11 through the side condenser 10 and is depressurized by the capillary tube 12 and is evaporated by the cooler 13.

  The cool air cooled by the cooler 13 is blown by the blower 14 to the freezer compartment 4, the refrigerator compartment 5, and the vegetable compartment 6 to cool each room to a predetermined temperature.

Here, the partition bodies 2, 3, 7 are easily cooled by the cooling action inside the cabinet, so that dew condensation is likely to occur. Is kept at a little lower than 40 ° C. to prevent the surface of the front plate 15 from being exposed.
Japanese Patent Laid-Open No. 7-180944

  However, in the above-described conventional configuration, the upper and lower end portions of the front plate 15 extend from the surface for securing the strength to the inside of the freezer compartment 4, and this extended portion is surrounded by the heat insulating material 16a, but the heat insulating material 16a. The heat insulation performance is not sufficiently high due to polystyrene foam, flexible foam, and the like, and voids are generated because it is not possible to have a close arrangement structure considering insertion workability. Therefore, a part of the heat radiation from the heat radiating pipe 16 easily enters the freezer compartment 4 as a heat load through both end portions of the front plate 15, resulting in a problem of reducing the efficiency of the refrigeration system of the refrigerator. On the other hand, the front plate 15 may be cooled and condensed by the cool air in the cabinet through both end portions of the front plate 15.

  Moreover, when a heat radiating pipe is abolished, there is a possibility that the surface temperature of the front plate decreases and sweats.

  Moreover, since the refrigerator with improved heat insulation has a low load, the operation rate is low. Since sweat prevention depends on the temperature of the pipe, if the operating rate is low, the effective operation time is short, and therefore it is difficult to prevent sweating.

  The present invention solves the conventional problems, prevents the temperature drop of the front plate of the partition body by improving the heat insulation of the partition plate and its surroundings, saves energy by eliminating the heat radiation pipe and reducing the heat load intrusion. Is intended. It also increases the temperature of the front plate surface and prevents sweating.

  In order to solve the above-described conventional problems, the refrigerator of the present invention is provided with the structural means for providing a separate protrusion on the partition and the means for forming the partition with resin. In addition to blocking transmission, it is possible to suppress the transfer of cool internal air to the front plate with a plastic resin material with low thermal conductivity. By compounding heat conductive materials, it is possible to conduct the heat effect outside the warehouse, prevent the surface temperature from deteriorating and prevent dew condensation.

  The refrigerator of the present invention suppresses heat conduction to the front plate of the cool air inside the cabinet, and at the same time, conducts the heat effect outside the cabinet without providing a heat radiating pipe, prevents deterioration of the surface temperature and prevents condensation. Therefore, heat intrusion into the cabinet can be suppressed and energy saving can be achieved.

  The invention according to claim 1 has at least two storage chambers, each of which has a door body that can be freely opened and closed at the front opening of the storage chamber, and a partition body that is provided on the front surface of the partition wall that partitions the storage chambers. Since the front surface of the partition is provided with a protrusion formed of a separate material having good heat conductivity, heat transfer between the partition and the protrusion can be cut off, so that the outside air It becomes easy to conduct heat to the front part of the partition body, the surface temperature of the front part of the partition body can be increased, and condensation can be prevented.

  The invention according to claim 2 has at least two storage chambers, and a partition formed of a resin on the front surface portion of the partition wall that partitions between the openable door body and the storage chamber at the front opening portion of the storage chamber. The plastic resin has a smaller heat capacity compared to metal, and the cold inside air against the surface of the front plate is provided by providing a body and providing a protrusion formed of a separate material with good thermal conductivity on the front surface of the partition. Since the influence is small and the influence of the cool air inside the warehouse on the front plate surface is small, the temperature drop on the front plate surface can be suppressed and condensation can be prevented. Even if no heat radiating pipe is installed, the surface temperature of the front part of the partition is increased by forming the protruding part with a material with good heat conductivity, making it easier for the outside air to conduct heat to the front part of the partition. And condensation can be prevented.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, the protrusion formed on the front surface of the partition body is vertically or vertically disposed between at least two door bodies facing the partition body and a gap between the door bodies. By having an extended surface sandwiched between the left and right, by projecting into the gap between the door body, the front surface of the projecting portion can be formed closer to the outside of the warehouse, so it is possible to pick up the thermal effect closer to the outside air temperature. Can conduct higher temperature on the front plate surface. Can prevent surface sweating.

  According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, the door body facing the partition body is provided with a seal member, and the seal member is disposed on the front surface of the partition body. The sealing performance can be improved by closing the gap in the vicinity of the seal portion by contacting the front portion so that the protrusion formed on the portion is sandwiched vertically or horizontally.

  The invention according to claim 5 is the invention according to any one of claims 1 to 4, wherein the front surface portion in contact with the sealing member having a magnetic body provided on the door facing the partition is Protruding parts made of good thermal conductivity are not formed, and the sealing surface is made of resin by disposing a magnetic material on the back of the sealing part of the front part made of resin. In addition to further suppressing the influence of cold air, it is possible to reliably seal the seal portion by incorporating a magnetic material.

  The invention according to claim 6 is the invention according to any one of claims 1 to 5, wherein the seal member is in contact with both the front surface of the partition body and the extended surface of the protruding portion, thereby Can be sealed, and the sealing performance can be further improved, so that heat penetration can be reduced.

  The invention according to claim 7 is the invention according to any one of claims 1 to 6, wherein the tip of the protruding portion does not protrude forward from the front surface of the door, so that the appearance quality is not lowered. Safety can be ensured without catching on the protruding portion.

  According to an eighth aspect of the invention, in the invention according to any one of the first to seventh aspects of the invention, the protrusion tip has a surface that is affected by heat outside the box by providing a flat portion. By doing, the thermal conductivity to a front part can be made high.

  The invention according to claim 9 is the invention according to any one of claims 1 to 7, wherein the tip of the projecting portion has a curved surface, so that appearance quality can be improved and contact has been made. It is also possible to ensure safety at times.

  The invention according to claim 10 is the invention according to any one of claims 1 to 9, wherein the tip of the protrusion is tapered to make the protrusion inconspicuous from the appearance of the front of the refrigerator. As a result, the design can be improved, and at the front part, heat can be conducted over a wide range, and sweating can be suppressed.

  According to an eleventh aspect of the present invention, in the invention according to any one of the first to tenth aspects of the present invention, the extended surface of the projecting portion has a structure for transferring heat over a wide range to the front surface portion by providing an inclination. It can be formed in a simpler shape.

  The invention according to a twelfth aspect is the invention according to any one of the first to eleventh aspects, wherein the heat generating heater is disposed in the projecting portion, so that the heat of the heat generating heater is utilized to control the outside air temperature. Regardless of the influence, the surface temperature of the front plate of the partition plate can be set to a high level so as not to sweat, and the heat effect of the heat generating heater in the storage chamber can be reduced by arranging the heat generating heater in the protruding portion. Further, as compared with a constant-temperature heat radiating pipe that cannot be temperature-controlled, it is only necessary to generate a heater having a required capacity only at a required outside air temperature, so that energy can be saved without using a wasteful electricity bill.

  A thirteenth aspect of the present invention is the invention according to any one of the first to twelfth aspects of the present invention, wherein the heat generating heater is disposed on the flat surface at the tip of the projecting portion, thereby utilizing the heat of the heat generating heater. In addition, the surface temperature of the front plate of the partition plate can be set high enough to prevent sweating regardless of the influence of the outside air temperature, and the heat effect of the heat generating heater in the storage chamber can be reduced by arranging the heat generating heater in the protruding portion. Further, as compared with a constant-temperature heat radiating pipe that cannot be temperature-controlled, it is only necessary to generate a heater having a required capacity only at a required outside air temperature, so that energy can be saved without using a wasteful electricity bill. Further, by installing the heater on the outside of the chamber as in the flat portion of the protruding portion, it is not necessary to allow extra heat generated from the heater to enter the chamber. Moreover, since the protrusion is made of a highly heat conductive material, it is easy to conduct heat at the tip of the heater to the front surface, and the heater capacity can be suppressed.

  The invention according to claim 14 is the invention according to any one of claims 1 to 13, wherein the inside of the partition body is filled with the hard urethane foam, so that the heat insulation into the interior can be enhanced. Since the amount of heat is not allowed to enter the cabinet, energy can be saved.

  The invention according to claim 15 is the invention according to any one of claims 1 to 14, wherein the refrigerant of the refrigerator is a flammable natural refrigerant, and the refrigerator according to the present invention is provided with a front condenser. Therefore, it is possible to provide a refrigerator that can reduce the system volume, reduce the amount of refrigerant, and increase the safety when refrigerant leaks.

  The invention according to claim 16 is the invention according to any one of claims 1 to 15, wherein the vacuum heat insulating material is disposed between the inner box and the outer box of the refrigerator, and is made of rigid urethane foam. By integrally foaming, the refrigerator in the present invention has a structure that suppresses the transmission of the cool air inside the cabinet to the front plate without arranging the front condenser, so that the operation rate of the refrigerator is reduced by the heat insulating performance of the vacuum heat insulating material. However, since the heat radiating pipe affected by the operation rate is not used as a sweat prevention means, the sweat can be stably prevented. Furthermore, since the vacuum heat insulating material has a heat insulation performance several times that of rigid urethane foam, it is possible to effectively prevent heat from entering the refrigerator cabinet, and to provide a refrigerator with high energy saving effect.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a front view of a refrigerator according to Embodiment 1 of the present invention. FIG. 2 is a longitudinal sectional view of the refrigerator according to the embodiment. FIG. 3 is a perspective view of the refrigeration cycle piping of the refrigerator according to the embodiment. FIG. 4 is a cross-sectional view of the refrigerator partition according to the embodiment.

  In FIG. 1 to FIG. 4, 17 is a refrigerator main body, and a refrigerator compartment 18, a vegetable compartment 19, an ice making room 20, a low temperature room 21, and a freezing room 22 are partitioned from above, and the ice making room 20 and the low temperature room 21 are sideways. Are lined up. The low greenhouse 21 may be a switching room that can control the temperature. 23 is a partition that partitions the refrigerator compartment 18 and the vegetable compartment 19 up and down, 24 is a partition that partitions the vegetable compartment 19 and the ice making compartment 20 and the low temperature compartment 21 up and down, and 25 is a partition that separates the ice making compartment 20 and the cold compartment 21 left and right. The partition body 26 is a partition body that partitions the ice making chamber 20, the low temperature chamber 21 and the freezing chamber 22 up and down.

  27 is a rotary door attached to the front opening of the refrigerator compartment 18 by a hinge, 28 is a pull-out door attached to the front opening of the vegetable compartment 19, 29 is a drawer door attached to the ice making compartment 20, and 30 is a low temperature. A door 31 attached to the chamber 21 is a drawer type door attached to the freezer compartment 22.

  32 is a cooler for the refrigeration cycle, 33 is a forced air blower provided above the cooler 32 and behind the freezer compartment 22, and 34 is an air path control means provided behind the vegetable compartment 19 and the low temperature compartment 21. And a damper (not shown) for adjusting the amount of cold air supplied to the refrigerator compartment 18, the vegetable compartment 19 and the low temperature compartment 21. The cool air cooled by the cooler 32 is blown into the chambers by the blower 33 and the air path control means 34.

  35 is a compressor of the refrigeration cycle, 36 is a side condenser, and 37 is a capillary tube. In the refrigerator according to the present embodiment, a front condenser for preventing sweating is not disposed in the front opening of the refrigerator main body 17 in order to suppress the heat load from entering the refrigerator.

  In FIG. 4, the partition part of the refrigerator compartment 18 and the vegetable compartment 19 is demonstrated typically.

  The partition body 23 is made of a plastic resin such as ABS or polypropylene, and is integrally molded up to the front surface portion 38. The front surface portion 38 is provided with a protruding portion 39 having a protruding shape that is molded as a separate member with a highly heat conductive material. The protrusion 39 protrudes into the gap 40 between the door bodies 27 and 28.

  The front end portion of the projecting portion 39 forms a flat portion 39 a and a curved surface portion 39 b, and is configured on the inner side of the front surfaces of the door bodies 27 and 28. The extension surface 41 of the protrusion 38 is formed in parallel with the door bodies 27 and 28.

  Reference numeral 42 denotes a hard urethane foam filled in the partition body 26. When the refrigerator body 17 is filled and foamed with the hard urethane foam, openings (not shown) are provided in fitting portions of the partition body 23 with the left and right refrigerator body 17; , The foam is filled in one piece.

  Reference numerals 43 and 44 denote gaskets as seal members, which have magnetic bodies 43a and 44a therein, and are disposed on the door bodies 27 and 28, respectively. The sealing members 43 and 44 are magnetically bonded to the inner surface of the front surface portion 38 of the partition portion 23 which is not formed with the protruding portion 39 made of a highly heat conductive material and is completely pressure-bonded.

  Further, the gaskets 43 and 44 have fin portions 43 a and 44 a, and are in contact with the extended surface 41 of the protruding portion 39.

  About the refrigerator comprised as mentioned above, the operation | movement is demonstrated below.

  The refrigerator 35, the vegetable room 21, the low temperature room 33, and the freezing room 22 are operated by the compressor 35, the side condenser 36, the capillary tube 37, the cooler 32, the blower 33, and the air path control means 34 that constitute the refrigeration cycle. It is cooled to a predetermined temperature. Here, in the refrigerator 17 of the present embodiment, a front capacitor for preventing sweating is not disposed in the front opening of the refrigerator main body 17 in order to suppress the heat load from entering the inside of the refrigerator, and the inside of the partition 23 is hard. Since the urethane foam 42 is filled, the heat load to the refrigerator cabinet due to the heat radiating pipe is eliminated, energy saving is enhanced, and the transmission of the cool air inside the cabinet to the front plate is suppressed by the hard urethane foam 42 having high heat insulation performance. Therefore, it is possible to prevent a decrease in the surface temperature of the front surface portion 38 and to prevent sweating of the front surface portion 38.

  Further, the partition body 23 is thermally conducted to the front surface portion 38 of the partition portion 23 by the protruding portion 39 formed of a good heat conductive material provided on the front surface portion 38, thereby increasing the temperature of the front surface portion 38 and preventing sweating. be able to.

  Moreover, by providing the flat part 39a at the tip part of the projecting part 39, it is easy to pick up the heat influence outside the warehouse, and the surface temperature of the front part 38 can be easily raised.

  Moreover, by providing the curved surface 39b at the tip of the protrusion 39, the appearance is improved and the safety is high.

  Further, by not projecting the front end portion of the protruding portion 39 from the doors 27 and 28, the appearance is improved and the safety is also improved.

  Moreover, the fin parts 43a and 44a are provided in the sealing members 43 and 44, and the sealing surface can be increased by bringing them into contact with the projecting portions 39, so that higher sealing performance can be ensured.

  Further, if the lower surface portion 27a and the upper surface portion 28a of the door bodies 27, 28 facing the front plate 38 are made of aluminum or steel plate which is a metal material having good heat conductivity, the heat of the outside air on the front surface of the door body is By the metal installed on the upper surface portion 28a and the lower surface portion 27a of the door bodies 27 and 28, the temperature of the front surface portion 39 can be appropriately increased and condensation can be prevented.

  In the present embodiment, the partition 23 has been described in the case where the refrigeration temperature zone of the refrigerator body 17 is divided up and down. However, the partition 23 has a two-stage freezer compartment and is applied to a partition that divides the freezing temperature zone up and down. May be. In this case, since the temperature difference from the surroundings is large, a greater energy saving effect can be obtained.

  The partition 26 is described as being integrally filled and foamed at the time of filling and foaming the rigid urethane foam of the refrigerator main body 17. However, the partition body 18 may be filled and foamed in advance with the rigid urethane foam and then incorporated into the refrigerator main body 17. In this case, since the hard urethane foam is surely filled in the partition body 18, high heat insulation can be stably obtained.

(Embodiment 2)
FIG. 5 is a cross-sectional view of a refrigerator partition according to Embodiment 2 of the present invention. In addition, about the same structure as Embodiment 1, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.

  The front surface portion 47 of the partition 23 is provided with a projecting portion 47 having a tapered tip with an extended surface 48 formed of an inclined surface, and a heater 50 is disposed inside the tip of the projecting portion 49.

  In the above-described configuration, the surface temperature can be increased by tapering the tip of the front end portion 47 by conducting heat outside the chamber over a wide area of the front surface portion 47 without reducing the appearance quality.

  In addition, the heater 50 discharged to the tip portion can prevent sweating more reliably than by the influence of the outside air temperature, and the heat effect on the interior is further reduced by the arrangement at the tip portion.

(Embodiment 3)
FIG. 6 is a longitudinal sectional view of the refrigerator according to the third embodiment. In addition, about the same structure as Embodiment 1, 2, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.

  In FIG. 6, 51 is a vacuum heat insulating material and is affixed to the outer box 52 of a refrigerator. The refrigerator of the present embodiment combines an outer box 52 and an inner box 53, and a rigid urethane foam 41 is foam-filled therebetween to form a casing having excellent heat insulation performance. In this embodiment, since the vacuum heat insulating material 51 is also provided on the rotary door 23 of the refrigerator compartment 20, the pull-out door 26 of the vegetable compartment 21, and the pull-out door 27 of the freezer compartment 22, the heat insulation performance is further improved. It is high.

  In the refrigerator of this embodiment, isobutane, which is a combustible natural refrigerant, is used as the refrigerant flowing in the refrigeration cycle formed by the cooler 32, the compressor 35, and the like.

  In the above configuration, the refrigerator of this embodiment uses a flammable natural refrigerant. However, since the refrigerator does not have a front condenser, the system volume is reduced and the amount of refrigerant is reduced. High safety. In addition, the use of natural refrigerants that have a small impact on global warming also gives consideration to the global environment.

  In addition, although the conventional refrigerator prevents sweating by the front capacitor for preventing sweating, if the operation rate of the refrigerator is reduced, the heat generation time is shortened and there is a risk of causing sweating. Since the refrigerator of this embodiment is excellent in heat insulation performance using the vacuum heat insulating material 51, the operation rate of the refrigerator is lowered. However, since the refrigerator has a structure that suppresses the transmission of the cool air inside the cabinet to the front plate, it can stably prevent sweating. Can do. Furthermore, since the vacuum heat insulating material has heat insulation performance several times that of rigid urethane foam, it can effectively prevent heat from entering the refrigerator cabinet, and has a high energy saving effect.

  In the present embodiment, the refrigerant flowing through the refrigeration cycle of the refrigerator is isobutane, which is a combustible natural refrigerant, but may be a fluorocarbon refrigerant such as HFC134a.

  As described above, the refrigerator according to the present invention suppresses the heat conduction of the cool air inside the cabinet to the front plate, and at the same time conducts the heat effect outside the cabinet without disposing the heat radiating pipe and prevents the surface temperature from deteriorating. Since dew condensation can be prevented, it can be applied to uses such as refrigeration equipment provided with a partition having a partition wall.

Front view of Embodiment 1 of a refrigerator according to the present invention Vertical sectional view of the refrigerator of the same embodiment Perspective view of the refrigeration cycle piping of the refrigerator of the same embodiment Sectional drawing of the partition of the refrigerator of the embodiment Sectional drawing of the partition of the refrigerator of Embodiment 2 of the refrigerator by this invention Longitudinal sectional view of Embodiment 3 of the refrigerator according to the present invention Vertical section of a conventional refrigerator Perspective view of conventional refrigerator refrigeration cycle piping Sectional view of a conventional refrigerator partition

Explanation of symbols

17 Refrigerator body 23 Partition 26 Refrigerating room door 27 Vegetable room door 38 Front part 39 Protruding part 40 Gap 41 Extension surface 42 Hard urethane foam 43, 44 Gaskets 43a, 44a Magnetic body 45, 46 Magnetic body 47 Front part 48 Extension Surface 49 Projection 50 Heater 51 Vacuum heat insulating material 52 Outer box 53 Inner box

Claims (16)

There are at least two storage chambers, a door body that can be freely opened and closed at the front opening portion of the storage chamber, and a partition body provided on the front surface portion of the partition wall that partitions the storage chambers, and a separate member on the front surface portion of the partition body A refrigerator provided with a protrusion formed of a good heat conductive material. A front surface portion of the partition body having at least two storage chambers, each provided with a door body that can be freely opened and closed at a front opening portion of the storage chamber and a partition body formed of resin on a front surface portion of a partition wall that partitions the storage chamber; A refrigerator having a protrusion formed of a good heat conductive material as a separate member. The projecting portion formed on the front surface of the partition has at least two doors facing the partition and an extended surface sandwiched vertically or horizontally between the gaps between the doors. The refrigerator described. The door body facing the partition is provided with a seal member having a magnetic body, and the seal member is in contact with the front surface portion so as to sandwich the protruding portion formed on the front surface portion of the partition body vertically and horizontally. The refrigerator according to any one of claims 1 to 3. The front part which the sealing member which has the magnetic body provided in the door opposite to the partition body comes into contact does not form a protruding part made of good heat conductivity, and the sealing part of the front part made of resin and The refrigerator according to any one of claims 1 to 4, wherein a magnetic body is disposed on a back surface of the opposing portion. The refrigerator according to any one of claims 1 to 5, wherein the seal member is in contact with both the front surface of the partition and the extended surface of the protrusion. The refrigerator tip according to any one of claims 1 to 6, wherein a tip of the protruding portion does not protrude in front of the front surface of the door. The refrigerator according to any one of claims 1 to 7, wherein a tip of the protruding portion is provided with a flat portion. The refrigerator according to any one of claims 1 to 7, wherein a tip of the protruding portion has a curved surface. The refrigerator according to any one of claims 1 to 9, wherein a tip of the protruding portion has a tapered shape. The refrigerator according to any one of claims 1 to 10, wherein the projecting portion extending surface is provided with an inclination. The refrigerator according to any one of claims 1 to 11, wherein a heating heater is disposed in the protruding portion. The refrigerator according to any one of claims 1 to 12, wherein a heating heater is disposed on a flat portion at a tip of the protruding portion. The refrigerator according to any one of claims 1 to 13, wherein the partition body is filled with hard urethane foam. The refrigerator according to any one of claims 1 to 14, wherein the refrigerant of the refrigerator is a flammable natural refrigerant. The refrigerator according to any one of claims 1 to 15, wherein the vacuum heat insulating material is disposed between an inner box and an outer box of the refrigerator and integrally foamed with rigid urethane foam.

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