JP2019039665A - refrigerator - Google Patents

Abstract

To provide a refrigerator that comprises heat insulation walls having thicknesses depending on storage temperature zones of storage chambers, and has stable heat insulation performance.SOLUTION: A refrigerator according to an embodiment comprises a heat insulation box body including a plurality of storage chambers having different storage temperature zones, and vacuum heat insulation panels are used as heat insulation materials of heat insulation walls constituting the heat insulation box body. Out of the storage chambers, the thickness of heat insulation walls corresponding to storage chambers having a high storage temperature zone is different from the thickness of heat insulation walls corresponding to storage chambers having a low storage temperature zone.SELECTED DRAWING: Figure 1

Description

  This embodiment relates to a refrigerator.

  For example, a refrigerator for home use is generally provided with a storage room in a refrigeration temperature zone and a storage room in a freezing temperature zone. Moreover, in the heat insulation box of the refrigerator, as the heat insulating material for the heat insulating wall, a foam heat insulating material made of urethane foam and a vacuum heat insulating panel having better heat insulating performance than this foam heat insulating material are provided. Yes.

JP 2014-6039 A

  Of the heat insulating walls constituting the heat insulating box, for example, the thickness of the back wall of the storage room is basically the same for the part corresponding to the storage room in the refrigeration temperature zone and the part corresponding to the storage room in the freezing temperature zone. Met. For this reason, the subject that heat insulation performance required as a heat insulation wall cannot be ensured or it becomes thicker than necessary occurs.

  Therefore, in a refrigerator having a heat insulation box having a plurality of storage rooms with different storage temperature zones and using a vacuum heat insulation panel as a heat insulating material of the heat insulation wall constituting the heat insulation box, according to the storage temperature zone of the storage room A refrigerator with stable heat insulation performance is provided.

  The refrigerator according to the present embodiment includes a heat insulating box having a plurality of storage chambers having different storage temperature zones, and uses a vacuum heat insulating panel as a heat insulating material of a heat insulating wall constituting the heat insulating box. The thickness of the heat insulation wall corresponding to the storage room having a high storage temperature zone and the thickness of the heat insulation wall corresponding to the storage room having a low storage temperature zone are different.

Schematic longitudinal side view of the refrigerator of one embodiment Front view of heat insulation box Rear view of insulation box Vertical side view of heat insulation box The perspective view in the state which looked at the heat insulation box from the bottom side of the back Transverse plan view along line X6-X6 in FIG. Transverse plan view along line X7-X7 in FIG. Transverse plan view along line X8-X8 in FIG. Expanded cross-sectional plan view in the refrigerator compartment Expanded cross-sectional plan view in the freezer compartment Enlarged sectional view of the Y11 part of FIG. Perspective view of vacuum insulation panel for back wall Enlarged sectional view of the Y13 portion of FIG. Transverse plan view near the electrical wiring storage box Perspective view from the front side of a single electrical wiring storage box Perspective view of bottom plate and reinforcing plate Perspective view from the front side of the inner box Perspective view from the back side of the inner box Cross-sectional plan view of drainage fixing part Longitudinal side view showing the mounting part of the reinforcing plate for the freezer compartment Longitudinal side view showing how to install a reinforcing plate for a freezer compartment

Hereinafter, a refrigerator according to an embodiment will be described with reference to the drawings.
First, as shown in FIG. 1, the heat insulating box 1 of the refrigerator, which will be described in detail later, is a heat insulating material in which a heat insulating material is provided in a space portion between a steel plate outer box 2 and a synthetic resin inner box 3. It consists of walls and has a plurality of storage chambers inside. Specifically, as the storage room, a refrigeration room 4 and a vegetable room 5 are provided from the upper stage, and an ice making room 6 and a small freezer room 7 (see FIG. 2) are provided side by side on the lower side, and the main parts are provided below these. A freezer compartment 8 is provided. An automatic ice making device 9 is provided in the ice making chamber 6.

  The refrigerator compartment 4 and the vegetable compartment 5 are both storage compartments in a refrigeration temperature zone (for example, a positive temperature zone of 1 to 4 ° C.), and the space between them is partitioned up and down by a partition wall 10 made of synthetic resin. Yes. On the front surface of the refrigerator compartment 4, a hinged open / close type heat insulating door 4a is provided so as to be rotatable in the front-rear direction. A door pocket 4b is provided on the back surface of the heat insulating door 4a. A drawer-type heat insulating door 5 a is provided on the front surface of the vegetable room 5. The lower case 11 which comprises a storage container is connected with the back surface part of this heat insulation door 5a. An upper case 12 that is smaller than the lower case 11 is provided on the upper portion of the lower case 11. A chilled chamber 13 is provided in the lowermost part of the refrigerator compartment 4 (upper part of the partition wall 10). A chilled case 14 is provided in the chilled chamber 13 so that it can be taken in and out.

  The ice making room 6, the small freezer room 7, and the main freezer room 8 are all storage rooms in a freezing temperature zone (for example, a minus temperature zone of −10 to −20 ° C.). The vegetable compartment 5 in the refrigerated temperature zone and the ice making chamber 6 and the small freezer compartment 7 in the refrigeration temperature zone are partitioned vertically by a heat insulating partition wall 15. The heat insulating partition wall 15 is provided integrally with the heat insulating box 1. Therefore, the storage temperature zone differs between the storage room (refrigeration room 4, vegetable room 5) in the refrigeration temperature zone and the storage room (ice making room 6, small freezer room 7, main freezing room 8) in the freezing temperature zone. The space is partitioned vertically by a heat insulating partition wall 15. A drawer-type heat insulating door 6a is provided on the front surface of the ice making chamber 6, and an ice storage container 16 is connected to the back surface of the heat insulating door 6a. Although not shown, a drawer-type heat insulating door to which a storage container is connected is also provided on the front surface of the small freezer compartment 7. A drawer-type heat insulating door 8a is also provided on the front surface of the main freezer compartment 8, and a lower container 17 and an upper container 18 constituting a storage container are connected to the back surface of the heat insulating door 8a.

  In the heat insulation box 1, a refrigeration cycle for cooling each storage chamber described above is incorporated. This refrigeration cycle includes a refrigeration cooler 20 that cools the refrigerator compartment 4 and the vegetable compartment 5 that are storage compartments in a refrigeration temperature zone, an ice making compartment 6 that is a storage compartment in a refrigeration temperature zone, a small freezer compartment 7, and a main freezer. A refrigeration cooler 21 that cools the chamber 8 is included. A machine room 22 is provided on the back side of the lower end of the heat insulation box 1. In the machine room 22, a compressor 23 constituting a refrigeration cycle, a condenser (not shown), a cooling fan (not shown) for cooling them, a defrost water evaporating dish 24, and the like are disposed. ing.

  In the back of the storage room (the refrigeration room 4 and the vegetable room 5) of the refrigeration temperature zone in the heat insulation box 1, the refrigeration cooler 20 and the cold air generated by the refrigeration cooler 20 are stored in the refrigeration room 4 (and A cold air duct 26 for supplying the vegetable compartment 5) and a refrigeration side blower fan 27 for circulating the cold air are provided as follows. A refrigeration side cooler chamber 28 also serving as a blower duct is provided behind the chilled chamber 13 at the lowermost stage of the refrigeration chamber 4, and the refrigeration cooler 20 is disposed in the refrigeration side cooler chamber 28. Has been. A suction port 29 for sucking the air in the vegetable compartment 5 is provided in the lower part on the front side of the refrigeration cooler compartment 28. In the lower part of the rear side of the refrigeration side cooler chamber 28, a refrigeration side water receiving part 30 for receiving defrost water of the refrigeration cooler 20 is provided. The water received by the refrigeration side water receiving part 30 is led to the defrosted water evaporating dish 24 in the machine room 22 via the drainage hose 30a (see FIG. 18), and evaporates.

  A refrigeration side blower fan 27 is disposed behind the chilled chamber 13, and a blower duct 31 is provided. The blower duct 31 has a lower end communicating with the upper part of the refrigeration side cooler chamber 28 and an upper end communicating with the lower end of the cold air duct 26. The cold air duct 26 extends upward along the back surface of the refrigerator compartment 4, and is covered with a duct cover 32 from the front. The duct cover 32 is provided with a plurality of cold air outlets 33 for supplying cold air passing through the cold air duct 26 into the refrigerator compartment 4 and the chilled chamber 13. In addition, although not shown in the figure, communication ports for communicating the refrigerator compartment 4 and the vegetable compartment 5 are formed at the left and right corners of the rear part of the partition wall 10 constituting the bottom plate of the refrigerator compartment 4.

  In this configuration, when the refrigeration side blower fan 27 is driven, as shown by the arrow in FIG. 1, the air in the vegetable compartment 5 is sucked into the refrigeration cooler chamber 28 from the suction port 29 and sucked. Air is blown out to the air duct 31 side. The air blown to the air duct 31 side passes through the cold air duct 26 and is blown out from the plurality of cold air outlets 33 into the refrigerator compartment 4 and the chilled chamber 13. A part of the cold air blown into the refrigerator compartment 4 is also supplied into the vegetable compartment 5. Finally, circulation is performed in which the air is sucked into the air duct 31 through the refrigeration side cooler chamber 28. In this process, the air passing through the refrigerating-side cooler chamber 28 is cooled by the refrigerating cooler 20 to become cold air, and the cold air is supplied to the refrigerating chamber 4 and the vegetable chamber 5. 5 is cooled to a temperature in the refrigeration temperature zone.

  A refrigeration-side cooler chamber 35 that also serves as a blower duct is provided at the back of the storage compartment (the ice making chamber 6, the small freezer compartment 7, and the main freezer compartment 8) in the heat insulation box 1 in the freezing temperature zone. A refrigeration cooler 21 and a defrosting heater (not shown) are disposed below the refrigeration side cooler chamber 35. A refrigeration-side blower fan 36 is disposed in the upper part of the refrigeration-side cooler chamber 35. On the front side of the refrigeration side cooler chamber 35, a cold air outlet 37 is provided corresponding to each storage room (the ice making chamber 6, the small freezer compartment 7, and the main freezer compartment 8), and a suction port 38 is provided below. It has been.

  A drainage basin 39 is provided below the refrigeration cooler 21 for receiving defrost water when the refrigeration cooler 21 is defrosted. The drainage tub 39 communicates with the defrosted water evaporating dish 24 in the machine room 22 through a drain pipe 40 that penetrates the bottom heat insulating wall of the heat insulating box 1. Thereby, the defrost water received by the drainage basin 39 is also led to the defrost water evaporating dish 24 through the drain pipe 40 and is evaporated in the defrost water evaporating dish 24.

  In this configuration, when the refrigeration side blower fan 36 is driven, the cold air generated by the refrigeration cooler 21 is supplied from the cold air outlets 37 into the ice making chamber 6, the small freezer compartment 7, and the main freezer compartment 8. After that, circulation is performed such that the air is returned from the suction port 38 into the refrigeration side cooler chamber 35. Thereby, the ice making room 6, the small freezer room 7, and the main freezer room 8 are cooled to the temperature of the freezing temperature zone. In addition, the control apparatus 41 which controls the operation | movement of the said refrigerator is provided in the upper surface side of the heat insulation wall of the ceiling part in the heat insulation box 1. FIG.

  Next, a specific configuration of the heat insulating box 1 will be described with reference to FIGS. The heat insulation box 1 has a left side wall 43, a right side wall 44, a ceiling wall 45, a bottom wall 46, a back wall 47, and the heat insulation partition wall 15, and the front surface is open. These walls 43 to 47 and the heat insulating partition wall 15 constitute a heat insulating wall of the heat insulating box 1.

  The outer box 2 constituting the outer plate of the heat insulating box 1 is made of a steel plate and includes a left side plate 53, a right side plate 54, a top plate 55, a bottom plate 56, and a back plate 57, and the front surface is opened. In this case, the left side plate 53, the right side plate 54, and the top plate 55 are formed by bending one long steel plate into a substantially U shape. A crank-like bent portion 56 a for forming the machine chamber 22 is bent in the bottom plate 56. As shown in FIG. 16, a reinforcing plate 58 made of a metal plate is fixed to the bottom plate 56 by spot welding on both the left and right sides of the front portion and the left and right sides of the rear upper portion. Further, metal side reinforcing plates 59 (see FIG. 5) are also fixed to the left and right sides of the bottom plate 56 by spot welding.

  In the left side plate 53 and the right side plate 54, connecting pieces 53 a and 54 a (see FIGS. 6 to 8) projecting inward are formed at the front end portions, and the rear end portions are directed forward. Connection pieces 53b and 54b are formed. At the left and right ends of the back plate 57, connection pieces are formed which are inserted and engaged with the connection pieces 53b and 54b of the left side plate 53 and the right side plate 54. As shown in FIGS. 3 and 5, injection ports 60 for injecting a stock solution of foam heat insulating material to be described later are formed in the upper and lower portions of the left and right sides of the back plate 57. The injection ports 60 are formed at four locations. The back plate 57 is provided with a plurality of reinforcing molding portions 61 extending in the vertical direction.

  The inner box 3 constituting the inner plate of the heat insulating box 1 is made of synthetic resin and is integrally formed by a vacuum forming machine. The inner box 3 includes a left side plate 63, a right side plate 64, a ceiling plate 65, a bottom plate 66, and a back plate corresponding to the left side plate 53, the right side plate 54, the ceiling plate 55, the bottom plate 56, and the back plate 57 of the outer box 2. 67 and an intermediate partition portion 68 that forms the outer shell of the heat insulating partition wall 15. The front surface is open. A flange portion projecting sideways is formed at the peripheral edge portion of the front opening. The bottom plate 66 is formed with a bent portion 66a for forming the machine chamber 22 corresponding to the bent portion 56a in the bottom plate 56 of the outer box 2. The flange portions of the left side plate 63 and the right side plate 64 are inserted and engaged with the connecting pieces 53 a and 54 a of the left side plate 53 and the right side plate 54 in the outer box 2.

  As shown in FIGS. 6 to 8, in the left side wall 43, a vacuum heat insulating panel 70 and a foam heat insulating material 71 made of foamed urethane are provided as heat insulating materials. The vacuum heat insulation panel 70 extends in the vertical direction along the left side wall 43 and is adhered to the inner surface of the left side plate 53 of the outer box 2 with an adhesive. The foam heat insulating material 71 is provided between the vacuum heat insulating panel 70 and the left side plate 63 of the inner box 3 and around the vacuum heat insulating panel 70.

  In the right wall 44, a vacuum heat insulating panel 72 and a foam heat insulating material 71 are provided as heat insulating materials in the same manner as the left side wall 43. The vacuum heat insulation panel 72 extends in the vertical direction along the right side wall 44 and is bonded to the inner surface of the right side plate 54 of the outer box 2 with an adhesive. The foam heat insulating material 71 is provided between the vacuum heat insulating panel 72 and the right side plate 64 of the inner box 3 and around the vacuum heat insulating panel 72.

  As shown in FIGS. 1 and 4, in the ceiling wall 45, a vacuum heat insulating panel 73 and a foam heat insulating material 71 are also provided as heat insulating materials inside the ceiling wall 45. A part of the vacuum heat insulating panel 73 is bonded to the ceiling plate 65 of the inner box 3 with an adhesive. The foam heat insulating material 71 is provided between the vacuum heat insulating panel 73 and the top plate 55 of the outer box 2, between the vacuum heat insulating panel 73 and the ceiling plate 65 of the inner box 3, and around the vacuum heat insulating panel 73. .

  In the bottom wall 46, a vacuum heat insulating panel 74 and a foam heat insulating material 71 are also provided as heat insulating materials. The vacuum heat insulation panel 74 has an L shape when viewed from the side, and is adhered to the upper surface of the bottom plate 56 of the outer box 2 with an adhesive. The foam heat insulating material 71 is provided between the vacuum heat insulating panel 74 and the bottom plate 66 of the inner box 3, between the vacuum heat insulating panel 74 and the bottom plate 56 of the outer box 2, and around the vacuum heat insulating panel 74.

  In the back wall 47, a vacuum heat insulating panel 75 and a foam heat insulating material 71 are provided as heat insulating materials. The vacuum heat insulation panel 75 extends in the vertical direction along the back wall 47. In this back wall 47, the refrigeration temperature zone back wall 47a corresponding to the refrigeration chamber 4 and the vegetable compartment 5 which are storage compartments in the refrigeration temperature zone, the ice making chamber 6, the small freezer compartment 7 which is a storage compartment in the freezing temperature zone, and The thickness of the back wall 47b for the freezing temperature zone corresponding to the main freezer compartment 8 is different. In the back wall 47a for the refrigeration temperature zone, the heat insulating material between the back plate 57 of the outer box 2 and the back plate 67 of the inner box 3 is basically a vacuum heat insulating panel 75, and partially foamed as will be described later. The heat insulating material 71 has entered. In the back wall 47b for the freezing temperature zone, a vacuum heat insulating panel 75 and a foam heat insulating material 71 are basically used together as a heat insulating material between the back plate 57 of the outer box 2 and the back plate 67 of the inner box 3. The foam heat insulating material 71 is provided between the back plate 67 of the inner box 3 and the vacuum heat insulating panel 75.

  Thus, in the back wall 47, the back wall 47b for the refrigeration temperature zone uses the vacuum heat insulation panel 75 and the foam heat insulation material 71 in combination as the heat insulation material. The back wall 47a is thicker than the back wall 47a. Accordingly, as shown in FIG. 4, the depth dimension L1 of the refrigerator compartment 4 and the vegetable compartment 5 which are storage compartments in the refrigeration temperature zone is the ice making room 6, the small freezer compartment 7 and the main compartment which are storage compartments in the freezing temperature zone. It is set larger than the depth dimension L2 of the freezer compartment 8 (L1> L2). In the heat insulating partition wall 15, a foam heat insulating material 71 is filled in the middle partition portion 68 of the inner box 3 as a heat insulating material.

  Here, a filling method for filling each heat insulating wall of the heat insulating box 1 with the foam heat insulating material 71 will be briefly described. While combining the outer box 2 and the inner box 3, the vacuum heat insulation panels 70, 72, 73, 74, and 75 corresponding to each heat insulation wall are arranged. And the raw | natural solution of a foam heat insulating material is inject | poured from the four injection holes 60 formed in the backplate 57 of the outer box 2 used as an upper surface in the state which orient | assigned the heat insulation box 1 below. The injected undiluted solution flows down the space in the left and right side walls 43 and 44 and reaches the connecting portion at the front portion of the left side plate 53 and the left side plate 63 and the connecting portion at the front portion of the right side plate 54 and the right side plate 64. Then it foams and spreads to the surrounding space. The expanded foam heat insulating material 71 is spread and filled in the space of the left and right side walls 43, 44, the space of the ceiling wall 45, the space of the bottom wall 46, and the space of the heat insulating partition wall 15, and finally the back wall 47. It fills the space.

  At this time, chamfered portions 76 (see FIGS. 6 and 9) are formed at the corner portions of the left and right rear portions of the heat insulating box 1 so as to be positioned at the corners of the inner box 3 and to be gentler than an angle of 90 degrees. Has been. A chamfered portion 76 a having a different angle is also provided at the corner of the inner box 3. For this reason, the stock solution of the foam heat insulating material injected from the injection port 60 is easily guided to the space of the left side wall 43 and the right side wall 44 along the chamfered portions 76 and 76a. Moreover, in the corner part of the heat insulation box 1, the guide member 77 which has the inclined guide surface 77a is shown inside the injection | pouring destination of the injection port 60 near the bottom part of the said heat insulation box 1, as shown in FIG. Is arranged. By providing this guide member 77, the stock solution of the foam heat insulating material injected from the injection port 60 is easily guided to the space of the left side wall 43 and the right side wall 44, similarly to the chamfered portions 76 and 76 a.

  At the left and right rear corners of the heat insulation box 1, the corners 78 at the left and right ends of the back plate 57 of the outer box 2 are bent at approximately 90 degrees. Accordingly, in the left and right rear corners of the heat insulation box 1, the chamfered portions 76, 76a which are the corners of the inner box 3 and the corners 78 of the back plate 57 of the outer box 2 have different bending angles, The angle of the chamfered portions 76 and 76 a of the box 3 is formed more gently than the angle of the corner portion 78 of the outer box 2. In the left and right and upper and lower rear corners of the heat insulation box 1, there is no vacuum heat insulation panel, and the foam heat insulating material 71 is thick. Further, in the portion where the thickness of the foam heat insulating material 71 is particularly large, as shown in FIGS. 8 and 10, the vacuum heat insulating panel 75 and the foam heat insulating material 71 are wrapped.

  Flat portions are formed at the lower end portions of the left and right sides of the back plate 57 so as to be positioned outside the corner portions 78. The lower end portion of the back plate 57 is formed on the side reinforcing plate 59 using the flat portions. It is screwed with a screw 50 (see FIGS. 5 and 8).

  As shown in FIG. 2, the back plate 67 of the inner box 3 is provided with convex parts 79 for mounting components on the left and right sides of the upper part, as shown in FIG. Convex part 80 which continues to 79 and extends downward is provided. These convex portions 79 and 80 protrude forward, and an internal space portion is filled with a foam heat insulating material 71. These left and right convex portions 79 and 80 are L-shaped as a whole and have a form in which the left and right sides face each other. The hollow portion surrounded by the left and right convex portions 79 and 80 is the cold air duct 26. The left and right component mounting projections 79 are formed with mounting holes 79a for mounting components, and the duct cover 32 is mounted using the mounting holes 79a.

  The left and right convex portions 79 and 80 are positioned around the vacuum heat insulation panel 75 of the back wall 47. A plurality of gas vent holes 81 are formed in front of the convex portions 79 and 80. The gas vent hole 81 functions as a gas vent hole when the foam heat insulating material 71 is filled with foam. The part where the gas vent hole 81 is formed is a narrow part where the foam heat insulating material 71 enters and a dead end when the foam heat insulating material 71 is filled with foam. This vent hole 81 is closed with a sheet 82 as shown in FIG. 18 before filling with the foam heat insulating material 71. This sheet 82 has a function of blocking gas leakage, but blocking the leakage of the foam heat insulating material 71. Further, by sticking the sheet 82 to the back side of the convex portion 80, even if there is a flash generated when the convex portion 80 or the gas vent hole 81 is formed, the vacuum heat insulating panel 75 is damaged by the flash. There is a function to prevent.

  Further, in the back plate 67 of the inner box 3, two reinforcing molding portions 83 extending in the vertical direction are provided at a portion sandwiched between the left and right convex portions 79 and 80. The reinforcing molded portion 83 has a small forward projecting dimension, and does not contain the foam heat insulating material 71 on the back side, and is a space portion. In the state where the duct cover 32 is attached to the convex portion 79 for attaching components, the left and right convex portions 79 and 80 and the reinforcing molding portion 83 are covered with the duct cover 32 and cannot be seen from the front. It has become. In this case, the convex portions 79 and 80 also function as reinforcing molding portions. In addition, in the refrigeration temperature zone back wall 47a of the back wall 47, the back plate 67 of the inner box 3 and the vacuum heat insulation panel 75 are not bonded with an adhesive, and the back plate of the unbonded portion. 67 is covered with a duct cover 32 from the front.

  On the back surface of the back plate 67 in the inner box 3, as shown in FIG. 18, a sheet 84 is attached from the portion surrounded by the convex portions 79 and 80 to the lower side. This sheet 84 also has a function of preventing the vacuum heat insulation panel 75 from being damaged by the molding flash on the back plate 67 side.

  In the back wall 47, a connecting portion between the back wall 47 a for a refrigerated temperature zone without the foamed heat insulating material 71 and the thermal insulation partition wall 15 that is a boundary portion between the back wall 47 b for the frozen temperature zone with the foamed heat insulating material 71 is shown in FIG. As shown in FIGS. 1, 4, and 13, the back plate 67 of the inner box 3 is provided with an inclined portion 85 that is inclined in a forwardly lowered state, and the foam heat insulating material 71 enters the back side of the inclined portion 85. Yes. As shown in FIG. 18, a sheet 86 is pasted on the upper surface of the inclined portion 85 on the back surface of the back plate 57 of the inner box 3. This sheet 86 is for preventing the foam insulation 71 from entering between the back plate 57 and the vacuum insulation panel 75 when the foam insulation 71 is filled with foam.

  As shown in FIGS. 1, 4, 11, and 12, the vacuum heat insulation panel 75 of the back wall 47 is formed with a stepped portion 87 a extending in the width direction at the upper and lower ends on the back side, Two groove portions 87b extending in the vertical direction and communicating with the step portions 87a are formed, and a heat radiating pipe 88 is disposed in the step portions 87a and the groove portions 87b. By adopting such a configuration, it is not necessary to form a recess for radiating the heat radiating pipe 88 on the back plate 57 side of the outer box 3. In this case, the upper and lower step portions 87a are formed by thinning out the core material of the vacuum heat insulating panel 75, and the two groove portions 87b are formed in a concave shape by press molding with a roller. Two groove portions 89 extending in the vertical direction are also formed outside the vacuum heat insulation panel 70 on the left side wall 43 and the vacuum heat insulation panel 72 on the right side wall 44, and a heat radiating pipe 88 is also disposed in these groove portions 89. (See FIGS. 6 to 10).

  In the left side wall 43 and the right side wall 44, a plurality of shelf receiving projections 90 are provided on the left side plate 63 and the right side plate 64 of the inner box 3 so as to be positioned at portions corresponding to the refrigerator compartment 4. These shelf receiving projections 90 extend in the front-rear direction and are arranged in a plurality of stages in the vertical direction. Further, the left side plate 63 and the right side plate 64 of the inner box 3 are provided with reinforcing molding portions 91 that are positioned in front of portions corresponding to the refrigerator compartment 4 and extend in the vertical direction. The space on the back side of the shelf receiving convex portion 90 and the reinforcing molding portion 91 is also filled with the foam heat insulating material 71.

  As shown in FIG. 2, an electrical wiring storage box 93 is provided at the lower left corner of the heat insulating box 1 so as to be located in the lower back of the refrigerator compartment 4. The electrical wiring storage box 93 is attached to the inner box 3 before foam filling of the foam insulation 71, and after foam filling of the foam insulation 71, the back side of the electrical wiring storage box 93 is foamed as shown in FIG. It will be in the state covered with the heat insulating material 71. The electrical wiring storage box 93 stores electrical wiring of electrical components (not shown).

  In FIG. 1 and FIG. 2, the drainage tub 39 is disposed in the inner part of the main freezer compartment 8 so as to be positioned above the machine room 22. The drainage basin 39 is made of, for example, a synthetic resin and has a rectangular container shape that is long in the left-right direction. As shown in FIG. 19, the drainage basin 39 has pin-shaped fixing portions 94 that protrude sideways on the left and right sides. doing. The left side plate 63 and the right side plate 64 of the inner box 3 are provided with convex portions 95 that are located at portions corresponding to the drainage basin 39 and project to the drainage basin 39 side. A mounting hole 96 is formed on the surface. In the drainage basin 39, the left and right fixing portions 94 are inserted into the mounting holes 96 on the inner box 3 side before foaming and filling of the foam heat insulating material 71. At this time, in the state before foam filling of the foam heat insulating material 71, the inner box 3 can be sufficiently elastically deformed, so that the fixing portions 94 can be easily inserted into the mounting holes 96. Then, with the drainage basin 39 attached to the inner box 3, the foam basin 39 is foamed and filled into each heat insulation wall of the heat insulation box 1, so that the drainage basin 39 is connected to the heat insulation box 1 via the fixing portion 94. Between the left side wall 43 and the right side wall 44 in a fixed state.

  In the inner box 3, a reinforcing plate 98 made of synthetic resin is provided above the drainage basin 39. The reinforcing plate 98 is made of, for example, a synthetic resin, and as shown in FIGS. 20 and 21, a pin-shaped fixing portion 99 protruding upward is provided at the upper portion, and for example, two engaging claws 100 are integrally formed at the lower portion. Is provided. The reinforcing plate 98 is attached as follows.

  That is, before foaming and filling the foam heat insulating material 71, as shown in FIG. 21, the front ends of the two engaging claws 100 of the reinforcing plate 98 are connected to the rear wall 39a of the drainage basin 39 and the back plate of the inner box 3. 67 and is hooked on the flange 39b at the upper end of the rear wall 39a (see FIG. 20), and the upper portion of the reinforcing plate 98 is indicated by the arrow in FIG. Rotate backward as shown. Then, the upper fixing portion 99 is temporarily fixed by being inserted into an attachment hole 101 formed on the lower surface of the intermediate partition portion 68 of the inner box 3 that forms the outer shell of the heat insulating partition wall 15. Also in this state, the inner box 3 can be easily elastically deformed before foaming and filling the foam heat insulating material 71, so that the fixing portion 99 can be easily inserted into the mounting hole 101. In this state, the reinforcing plate 98 can be firmly attached to the inner box 3 by foaming and filling the foam heat insulating material 71 into the heat insulating box 1.

  Therefore, the reinforcing plate 98 is attached by being locked to the drainage basin 39. In this case, for attaching the reinforcing plate 98, it is necessary to provide the attachment hole 101 in the intermediate partition portion 68 of the inner box 3, but it is not necessary to provide the attachment hole in the back plate 67.

  As shown in FIGS. 17 and 18, the soft tape 103 is attached to a plurality of locations such as a portion corresponding to the partition portion of the storage chamber in the flange portion at the peripheral edge portion of the opening of the inner box 3. This soft tape 103 is for preventing the foam heat insulating material 71 from leaking to the outside in a state where the flange portion of the inner box 3 is connected to the connecting pieces 53a and 54a of the outer box 2. A refrigerant pipe 104 such as a suction pipe of a refrigeration cycle is disposed at the left and right corners of the heat insulation box 1.

When packing the refrigerator having the above-described configuration, although not illustrated, it is preferable to place a cushioning material on the upper surface of the control device 41 of the ceiling wall 45 in the heat insulating box 1 in the packing box.
According to the above-described embodiment, the following operational effects can be obtained.

  In a refrigerator including a heat insulating box 1 having a plurality of storage chambers having different storage temperature zones and using a vacuum heat insulating panel as a heat insulating material of the heat insulating wall constituting the heat insulation box 1, the storage temperature zone of the storage chamber is The thickness of the heat insulating wall corresponding to the high storage room is different from the thickness of the heat insulating wall corresponding to the storage room having a low storage temperature zone. Specifically, in the back wall 47 of the heat insulating box 1, the refrigeration temperature zone back wall 47 a corresponding to the refrigeration temperature zone storage compartment (refrigeration compartment 4, vegetable compartment 5) which is a storage compartment having a high storage temperature zone. The thickness is made thinner than the thickness of the back wall 47b for the freezing temperature zone corresponding to the freezing temperature zone storage room (the ice making room 6, the small freezing room 7, the main freezing room 8) which is a low temperature storage room. ing. In this case, the back wall 47a for the refrigeration temperature zone can basically ensure the heat insulating performance only by the vacuum heat insulating panel 75 as the heat insulating material, and can reduce the thickness. The back wall 47b for the freezing temperature zone uses the vacuum heat insulating panel 75 and the foam heat insulating material 71 together as the heat insulating material, and the heat insulating performance is ensured by the vacuum heat insulating panel 75 and the foam heat insulating material 71. Therefore, it is possible to provide a refrigerator including a heat insulating wall having a thickness corresponding to the storage temperature zone of the storage room and having stable heat insulating performance.

  Of the heat insulating wall in the heat insulating box 1, the part where the foam heat insulating material 71 is not used as the heat insulating material or the usage amount is small is for the refrigeration temperature zone which becomes the back wall of the storage room in the refrigeration temperature zone where the storage temperature zone is high. Used only on the back wall 47a. The back wall 47a for the refrigerated temperature zone can basically ensure heat insulation performance only with the vacuum heat insulation panel 75.

  A sheet 84 is provided between the back plate 67 of the inner box 3 and the vacuum heat insulation panel 75 in the back wall 47a for the refrigeration temperature zone in which the foam heat insulating material 71 is not used among the heat insulating walls. The back plate 67 of the inner box 3 is often provided with a projecting portion 79 for mounting components, and a flash during molding is likely to occur. When the back plate 67 and the vacuum heat insulation panel 75 are in direct contact, the vacuum heat insulation panel 75 may be damaged by the flash or the like, but by providing the sheet 84 between them, the vacuum heat insulation panel 75 is prevented from being damaged. it can.

A convex portion 79 for mounting components is provided on the back plate 67 of the inner box 3 which is the inner plate of the back wall 47. The duct cover 32 can be attached using this convex portion 79.
A gas vent hole 81 is provided in a narrow portion where the foamed heat insulating material 71 enters and a dead end in the back plate 67 serving as an inner plate of the back wall 47, and the gas vent hole 81 is provided as a breathable sheet 82. I tried to close it. Thereby, gas can be easily extracted from the gas vent hole 81 during foam filling of the foam heat insulating material 71, and foam filling of the foam heat insulating material 71 can be performed satisfactorily. Further, it is possible to prevent the vacuum heat insulating panel 75 from being damaged by the flash generated when the gas vent hole 81 is formed.

  The back plate 67 of the inner box 3 serving as the inner plate of the back wall 47 is provided with convex portions 79 and 80 projecting toward the storage chamber, and these convex portions 79 and 80 are located around the vacuum heat insulating panel 75. Yes. The foam heat insulating material 71 enters the back side of the convex portions 79 and 80, and the vacuum heat insulating panel 75 can be wrapped with the foam heat insulating material 71.

  The back plate 67 of the inner box 3 serving as the inner plate of the back wall 47 is provided with convex portions 79 and 80 projecting to the storage chamber side, and the hollow portion surrounded by the convex portions 79 and 80 is used as the cold air duct 26. . According to this, the cold air duct 26 can be formed satisfactorily.

  The depth dimension L1 of the storage room (refrigeration room 4, vegetable room 5) with a high storage temperature zone is larger than the depth dimension L2 of the storage room (ice-making room 6, small freezer room 7, main freezer compartment 8) with a low storage temperature zone. It is set long. According to this, it becomes possible to ensure a wide effective internal volume of the storage room having a high storage temperature zone.

  In the cool air duct 26 formed inside the heat insulation box 1, the cool air flowing through the cool air duct 26 is not allowed to flow to a portion where the vacuum heat insulation panel 75 does not exist. According to this, there is an advantage that the heat loss of the cold air passing through the cold air duct 26 can be reduced.

  On the back plate 67 of the inner box 3 which is the inner plate of the back wall 47, there is a back wall 47b for the freezing temperature zone in which there is the foam insulation 71 in the back wall 47 and a back wall 47a for the refrigeration temperature zone without the foam insulation 71. An inclined portion 85 is provided at the boundary portion. Accordingly, the foam heat insulating material 71 can easily enter the back side of the inclined portion 85, and the vacuum heat insulating panel 75 and the back plate 67 can be firmly connected by the foam heat insulating material 71. Further, when the inner box 3 is molded, the boundary portion is the inclined portion 85, so that the moldability can be improved as compared with the case where the boundary portion is a corner portion of approximately 90 degrees. Further, it is easy to stack the inner boxes 3 when stacking them, and the handleability can be improved.

  The back plate 67 of the inner box 3 and the vacuum heat insulation panel 75 at the boundary between the back wall 47b for the freezing temperature zone having the foam insulation 71 and the back wall 47a for the refrigerating temperature zone without the foam insulation 71 in the back wall 47. In between, the sheet | seat 86 which prevents the penetration | invasion of the foam heat insulating material 71 was provided. According to this, it can prevent that the back board 67 deform | transforms because the foam heat insulating material 71 permeates.

  The back plate 67 of the inner box 3 is provided with a reinforcing molding portion 83, and the left side plate 63 and the right side plate 64 are also provided with a reinforcing molding portion 91. According to this, it becomes possible to raise the intensity | strength of the synthetic resin back board 67, the left side board 63, and the right side board 64 by providing the shaping parts 83 and 91 for reinforcement. Since the duct cover 32 is provided on the back plate 67 as a cover for covering the reinforcing molding portion 83 from the front, the appearance can be improved.

  Among the heat insulating walls of the heat insulating box 1, the ceiling wall 45 is bonded to the ceiling plate 65 serving as the inner plate and the vacuum heat insulating panel 73 with an adhesive. According to this, peeling of the ceiling board 65 and the vacuum heat insulation panel 73 can be prevented. In the heat insulation wall of the heat insulation box 1, the back wall 47 a for the refrigeration temperature zone in which the space between the inner box 3 and the vacuum heat insulation panel 75 is not adhered with an adhesive is covered with the duct cover 32 from the storage room side. According to this, it becomes possible to improve the appearance by the duct cover 32.

  In each heat insulation wall in the heat insulation box 1, the foam heat insulation 71 exists so that the circumference | surroundings of the vacuum heat insulation panels 70, 72, 73, 74, and 75 may be enclosed. According to this, these vacuum heat insulation panels 70, 72, 73, 74, 75 can be protected by the foam heat insulating material 71.

  In the corner portion of the heat insulating box 1, the foam heat insulating material 71 is thick (see FIGS. 6 to 10). Since it is difficult to dispose a vacuum heat insulation panel at the corner portion of the heat insulation box 1, it is preferable that the heat insulation is mainly composed of the foam heat insulation 71. Moreover, in the heat insulation wall, the place where the vacuum heat insulation panel does not exist in the heat insulation material is mainly the foam heat insulation material 71, and the foam heat insulation material 71 is thick. In the heat insulating box 1, the portion where the foam heat insulating material 71 is thick is wrapped by the foam heat insulating material 71 and the vacuum heat insulating panel (see FIG. 10). According to this, the heat insulation performance improves further in the wrapped part.

  There is an electrical wiring storage box 93 at the corner of the heat insulation box 1. According to this, the corner portion can be effectively used. That is, since the wiring etc. are arranged in the space filled with the foam insulation 71, the vacuum insulation panel can be prevented from being damaged due to contact between the wiring etc. and the vacuum insulation panel, and the corner portion can be used. Therefore, the wiring process can be performed linearly in the vertical direction, so that the manufacturability is good.

  A heat radiating pipe 88 is arranged in a stepped portion 87a formed in the vacuum heat insulating panel 75 of the back wall 47 (see FIG. 11). According to this, when the heat radiating pipe 88 is arranged, it is possible to eliminate the need to form a recess for escaping the pipe on the back plate 57 side of the outer box 2.

  At the corner of the inner box 3 of the heat insulation box 1, chamfered portions 76 and 76 a for guiding the raw solution to the left side wall 43 and the right side wall 44 of the heat insulation box 1 when the raw solution of the foam heat insulating material 71 is injected are provided (see FIG. 6). According to this, the stock solution of the foam heat insulating material 71 can be satisfactorily guided to the left and right side walls 43 and 44, and the foam filling work of the foam heat insulating material 71 can be performed satisfactorily. In addition, a guide surface 77a for guiding the undiluted solution to the left side wall 43 and the right side wall 44 of the heat insulation box 1 is injected into the injection port 60 for injecting the undiluted solution of the foam insulation 71 at the corner portion of the heat insulation box 1. A guide member 77 is provided (see FIG. 8). Also by this, the stock solution of the foam heat insulating material 71 can be satisfactorily guided to the left and right side walls 43, 44, and the foam filling work of the foam heat insulating material 71 can be performed satisfactorily.

  In the corner portion of the heat insulating box 1, the angle of the chamfered portions 76 and 76 a that become the corner portion of the inner box 3 is formed more gently than the angle of the corner portion 78 that becomes the corner portion of the outer box 2, and the angles are different. Let According to this, it becomes possible to set the width dimension of the left-right direction of the vacuum heat insulation panel 75 in the back part wall 47 as large as possible.

  An injection port 60 for injecting a stock solution of the foam heat insulating material 71 was formed near the corner portion 78 of the back plate 57 in the heat insulating box 1. According to this, the stock solution of the foam heat insulating material 71 can be easily poured into the left and right side walls 43 and 44. The outside of the corner portion 78 of the back plate 57 in the heat insulation box 1 is formed flat, and the screw 50 is fixed using the flat portion. According to this, the back plate 57 can be firmly fixed. A soft tape 103 was provided at the connecting portion between the flange portion of the inner box 3 and the outer box 2 in the heat insulating box 1. Thereby, the foaming heat insulating material 71 can be prevented from leaking to the outside during the foam filling of the foaming heat insulating material 71.

  A metal reinforcing plate 58 and a side reinforcing plate 59 were fixed to the metal bottom plate 56 constituting the outer plate at the bottom of the heat insulating box 1 by spot welding. According to this, the bottom plate 56 can be reinforced and the fixing operation can be easily performed.

  A reinforcing plate 98 provided at the rear part of the storage room in the freezing temperature zone and a drainage basin 39 for receiving the defrost water of the refrigeration cooler 21 are provided, and the engaging claws 100 of the reinforcing plate 98 are connected to the rear wall 39a of the drainage basin 39. It was set as the structure fixedly locked to an edge part. According to this, the reinforcing plate 98 can be attached to the back plate 67 without providing a mounting hole in the back plate 67 of the inner box 3. Since the drainage basin 39 has protruding fixing portions 94 on both left and right side portions and is fixed to the left and right side walls 43 and 44 via the fixing portion 94, the drainage basin 39 is firmly attached to the heat insulating box 1. Can be attached.

(Other embodiments)
In the above-described embodiment, the thickness of the back wall 47a for the refrigeration temperature zone and the back wall 47b for the refrigeration temperature zone in the back wall 47 of the heat insulation walls of the heat insulation box 1 is not limited to this. For example, the left side wall 43 and the right side wall 44 may have different thicknesses.

  Further, in the back wall 47, a refrigeration temperature zone back wall 47a mainly composed of a vacuum heat insulation panel 75 as a heat insulation material, and a refrigeration temperature zone back wall 47b using both the vacuum heat insulation panel 75 and the foam heat insulation material 71 as heat insulation materials. Although the thickness is made different, the thickness of the vacuum heat insulating panel 75 can be made different between the refrigeration temperature zone back wall 47a and the refrigeration temperature zone back wall 47b.

In the above-described embodiment, an example in which two coolers, the refrigeration cooler 20 and the refrigeration cooler 21, are provided. However, the present invention is not limited to this, and one cooler may be used.
As described above, according to the refrigerator of the present embodiment, a heat insulating box having a plurality of storage chambers having different storage temperature zones is provided, and a vacuum heat insulating panel is used as a heat insulating material of a heat insulating wall constituting the heat insulating box. The thing of a structure can provide the refrigerator provided with the heat insulation wall of the thickness according to the storage temperature zone of a store room, and the heat insulation performance stabilized.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

  In the drawings, 1 is a heat insulating box, 2 is an outer box (outer plate), 3 is an inner box (inner plate), 4 is a refrigeration room (a storage room in a refrigeration temperature zone), and 5 is a vegetable room (a storage in a refrigeration temperature zone) Room), 6 is an ice making room (freezing temperature zone storage room), 7 is a small freezing room (freezing temperature zone storage room), 8 is a main freezing room (freezing temperature zone storage room), 15 is a heat insulating partition wall, 20 is a refrigeration cooler, 21 is a refrigeration cooler, 26 is a cold air duct, 32 is a duct cover (cover), 39 is a drain, 41 is a control device, 43 is a left side wall, 44 is a right side wall, and 45 is a ceiling. 46, a bottom wall, 47 a back wall, 47a a refrigeration temperature zone back wall, 47b a refrigeration temperature zone back wall, 50 screws, 53 a left side plate, 54 a right side plate, 55 a ceiling plate, 56 Is a bottom plate, 57 is a back plate, 58 is a reinforcing plate, 59 is a side reinforcing plate, 60 is an inlet, 63 is a left side plate, 64 is a right side plate, 65 is a ceiling plate, and 66 is a bottom , 67 is a back plate, 68 is an intermediate partition, 70 is a vacuum insulation panel, 71 is a foam insulation, 72, 73, 74, and 75 are vacuum insulation panels, 76 and 76a are chamfered portions, 77 is a guide member, and 77a is Guide surface, 78 is a corner, 79 is a convex part for mounting parts, 80 is a convex part, 81 is a vent hole, 82 is a sheet, 83 is a molded part for reinforcement, 84 is a sheet, 85 is an inclined part, 86 is Sheet, 87a is a stepped part, 87b is a groove part, 88 is a heat radiating pipe, 89 is a groove part, 90 is a convex part for shelf receiving, 91 is a molding part for reinforcement, 93 is an electric wiring storage box, 94 is a fixing part, 98 is reinforcement Reference numeral 99 denotes a fixing portion, 100 denotes an engaging claw, and 103 denotes a soft tape.

Claims (32)

In a refrigerator comprising a heat insulating box having a plurality of storage chambers with different storage temperature zones, and using a vacuum heat insulating panel as a heat insulating material of a heat insulating wall constituting the heat insulating box,
The refrigerator with which the thickness of the heat insulation wall corresponding to the storage room with a high storage temperature zone differs from the thickness of the heat insulation wall corresponding to the storage room with a low storage temperature zone among the said storage rooms.   The refrigerator according to claim 1, wherein a foam heat insulating material is also used as the heat insulating material of the heat insulating wall, and the thickness of the heat insulating wall is different between a place where the foam heat insulating material is present and a place where the foam heat insulating material is not present.   The portion of the heat insulation wall in which the foam heat insulating material is not used for the heat insulating material or the usage amount is small is used only for the heat insulating wall of the storage room having a high storage temperature zone. Refrigerator.   The refrigerator according to claim 2 or 3, wherein a portion of the heat insulating wall where no foam heat insulating material is used for the heat insulating material or a small amount of the heat insulating wall is used only for the back wall of the storage chamber.   The refrigerator as described in any one of Claim 1 to 4 which provided the sheet | seat between the inner plate by the side of the said storage chamber, and the said vacuum heat insulation panel in the part in which the foaming heat insulating material is not used among the said heat insulation walls.   The refrigerator according to any one of claims 1 to 5, wherein in the heat insulating box, an inner plate existing on the storage chamber side is provided with a convex part for mounting a component protruding to the storage chamber side.   A gas vent hole is provided in a narrow portion where the foamed heat insulating material enters and a dead end in the inner plate existing on the storage chamber side in the heat insulating box, and the gas vent hole is closed with a sheet. The refrigerator according to any one of 6.   In the said heat insulation box, the convex part which protrudes in the storage chamber side is provided in the inner plate which exists in the said storage chamber side, The said convex part is located in the circumference | surroundings of the said vacuum heat insulation panel. A refrigerator according to claim 1.   The inner plate existing on the storage chamber side in the heat insulation box is provided with a convex portion projecting toward the storage chamber side, and the hollow portion surrounded by the convex portion is a cold air duct. The refrigerator according to the item.   The refrigerator according to any one of claims 1 to 9, wherein a depth dimension of a storage room having a high storage temperature zone among the storage rooms is longer than a depth dimension of a storage room having a low storage temperature zone.   The refrigerator according to any one of claims 1 to 10, wherein in the cool air duct formed inside the heat insulating box, the cool air flowing through the cool air duct is not passed to a portion where the vacuum heat insulating panel does not exist.   The inner plate existing on the storage chamber side in the heat insulating box body is provided with an inclined portion located at a boundary portion between a place where the foamed heat insulating material is present and a place where there is no foam heat insulating material in the heat insulating wall. The refrigerator according to one item.   Prevents infiltration of the foam insulation between the inner plate present on the storage chamber side and the vacuum insulation panel at the boundary between the place where the foam insulation is present and the place where the foam insulation is present on the insulation wall of the heat insulation box. The refrigerator according to any one of claims 2 to 12, wherein a sheet is provided.   The refrigerator according to any one of claims 1 to 13, wherein an inner plate existing on the storage chamber side in the heat insulating box has a reinforcing molded part.   The refrigerator of Claim 14 which has a cover which covers the said shaping | molding part for reinforcement.   The refrigerator according to any one of claims 1 to 15, wherein an inner plate and the vacuum heat insulation panel existing on the storage chamber side of the heat insulation wall of the heat insulation box are bonded with an adhesive.   The part of the heat insulation wall of the heat insulation box, which is covered with a cover from the storage chamber side, is covered with an adhesive between the inner plate existing on the storage chamber side and the vacuum heat insulation panel. The refrigerator according to the item.   The refrigerator according to any one of claims 2 to 17, wherein a foam heat insulating material exists so as to surround the vacuum heat insulating panel.   The refrigerator according to any one of claims 2 to 18, wherein a foamed heat insulating material is thick at a corner portion of the heat insulating box.   The refrigerator according to any one of claims 2 to 19, wherein in the heat insulating box, a portion where the foam heat insulating material is thick is wrapped by the foam heat insulating material and the vacuum heat insulating panel.   The refrigerator according to any one of claims 1 to 20, wherein an electrical wiring storage box for storing electrical wiring exists in a corner portion of the heat insulating box.   The refrigerator as described in any one of Claim 1 to 21 which has arrange | positioned the thermal radiation pipe in the level | step-difference part formed in the said vacuum heat insulation panel.   The chamfering part which guides the undiluted | stock solution to the side wall of the said heat insulation box at the time of the injection | pouring of the undiluted solution of a foam heat insulating material was provided in the inner plate which exists in the said storage chamber side in the said heat insulation box. The refrigerator described.   24. The heat insulating box body according to any one of claims 2 to 23, wherein a guide member having a guide surface for guiding the raw solution to a side wall of the heat insulating box body is provided at an injection destination of an injection port for injecting a raw solution of foam heat insulating material. The refrigerator according to one item.   The refrigerator according to any one of claims 1 to 24, wherein an angle of the inner plate on the storage chamber side and an angle of the outer plate on the opposite side to the storage chamber are made different in a corner portion of the heat insulation box.   The refrigerator according to claim 25, wherein an angle of the inner plate is formed more gently than an angle of the outer plate at a corner portion of the heat insulating box.   The refrigerator according to claim 23 or 24, wherein an inlet for injecting a stock solution of foam heat insulating material is formed near a corner portion of the outer plate in the heat insulating box.   The refrigerator according to any one of claims 25 to 28, wherein an outer side of a corner portion of the outer plate in the heat insulating box is formed flat and is screwed using the flat portion.   The refrigerator according to any one of claims 1 to 28, wherein a soft tape is provided at a connection portion between the inner plate on the storage chamber side and the outer plate on the opposite side of the storage chamber in the heat insulation box.   The refrigerator as described in any one of Claim 1 to 29 which fixed the metal reinforcement board to the metal bottom board which comprises the outer plate | board of the bottom part of the said heat insulation box by spot welding. A reinforcing plate provided at the rear of the storage room having a low storage temperature zone among the storage rooms, and a drainage basin for receiving defrost water from the cooler,
The refrigerator according to any one of claims 1 to 30, wherein the reinforcing plate is locked and fixed to the drainage basin.   The refrigerator as described in any one of Claims 1-31 provided with the drainage tub which receives the defrost water of a cooler, and this drainage basin was fixed to the left and right side walls in the said heat insulation box through the fixing | fixed part.

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