JP3823993B2 - refrigerator - Google Patents

Description

  The present invention relates to a refrigerator in which a compressor is loaded on the top surface.

  In recent years, refrigerators are required to be more energy-saving from the viewpoint of protecting the global environment, and to be improved in usability and storage.

  In the conventional refrigerator of this type, for the purpose of increasing the storage capacity of the storage room arranged at the bottom, a recessed part that is recessed so that the back of the uppermost part of the storage room of the heat insulation box is lowered. The method of providing the component apparatus of a refrigerating cycle in the recessed part and taking it was taken (for example, refer patent document 1).

  FIG. 5 shows a configuration of a conventional refrigerator described in Patent Document 1. As shown in FIG.

  As shown in FIG. 5, the heat insulating box 1 includes a refrigerator compartment 2, a freezer compartment 3, and a vegetable compartment 4 in order from the top, and a refrigerator compartment rotary door 5 is provided at the front opening of the refrigerator compartment 2. . In addition, the freezer compartment 3 and the vegetable compartment 4 located in the lower part from the center of the heat insulation box 1 are a drawer-type freezer compartment drawer door 6 and a vegetable compartment drawer door 7 that can be easily taken out in consideration of storability and usability. Is provided. A plurality of storage shelves 8 are provided inside the refrigerator compartment 2, and a storage container 9 having an open top surface is attached to the freezer compartment 3 and the vegetable compartment 4. The storage container 9 is supported by a roller (not shown) so as to be movable in the front-rear direction by a roller.

  The recessed part 10 provided in the heat insulation box 1 is a place where the top back part over the outer box upper surface 11 and the outer box back surface 12 is recessed so that the uppermost back part of the refrigerator compartment 2 is lowered. The left and right sides of the recess 10 are closed by the left and right walls of the heat insulation box 1 and open upward and to the back. It is covered with the recessed part cover 15 which consists of these. In addition, the dent cover 15 is detachably fixed to the heat insulating box 1 with screws or the like.

  The compressor 16 and the condenser 17 which are components of the refrigeration cycle are disposed so as to be accommodated in the recess 10 together with the machine room fan 18, and are covered with the recess cover 15. Further, the upper plate 13 and the back plate 14 of the recess cover 15 are provided with a plurality of ventilation holes 19 for heat dissipation.

  Moreover, the evaporator 20 which is a component of the refrigeration cycle is disposed with a cooling fan 21 at the back of the freezer compartment 2, and the vegetable compartment 4 which is the lowest storage compartment is deeply configured.

Thereby, compared with what accommodates the compressor 16 and the condenser 17 in the back lower part of the heat insulation box 1, the internal volume of the vegetable compartment 4 can be enlarged and comprised deeply.
JP 2001-99552 A

  However, the above-described conventional configuration has a problem in that appearance deformation occurs on the left and right walls of the heat insulating box corresponding to the recessed portion of the heat insulating box. This is because when heat insulation box is integrally foamed to form a heat insulator, the inner pressure during foaming tends to expand and the outer part of the heat insulation box tends to expand, but foam pressure is applied to the outer part of the heat insulation box. If there is a part that is not made a part, an appearance deformation occurs due to a pressure difference. For example, when foaming is performed from the side wall surface of the heat insulating box, first, the foam material flows into the entire side wall surface, and foaming is performed. In particular, the foam material flows into the side wall surface around the recess where the compressor is accommodated. After that, the foam material flows in the vertical direction from the side wall surface to the bottom surface of the recess or the inside of the front side wall. Thus, the location where the foaming material flows in the direction perpendicular to the side wall surface is less likely to be subjected to foaming pressure and tends to be easily deformed such as a dent. This deformation was very inconspicuous when the compressor was in the lower part, but even if it was a slight deformation, it became a very conspicuous problem when the compressor was arranged at the top of the heat insulation box. .

  Furthermore, when the right and left walls of the recess have a rectangular shape protruding without fixing two sides, the rigidity is weak and deformation such as warping is often caused.

  In addition, such a problem is not limited to the heat insulating body in which the left and right walls of the heat insulating box and the recessed portion are integrally foamed, and even when the assembly is performed after foaming the heat insulating box and the recessed portion separately, In the case of a complicated shape such as a part, it is difficult to strictly manage the dimensional accuracy after heat insulation foaming, and it is particularly easy to be deformed around the connecting part.

  This invention solves the said conventional subject, and it aims at providing the refrigerator which prevented the external appearance deformation | transformation of the right-and-left wall surface of a heat insulation box.

In order to solve the above-described conventional problems, the refrigerator of the present invention includes a heat insulating box that partitions the inside of the cabinet with a heat insulating wall formed of a foam heat insulating body, and a recessed portion provided at the rear of the top surface of the heat insulating box. And a compressor disposed in the recess , the foam insulation is foam-filled on the left and right wall surfaces of the recess, and the heat insulation box is seen from the side. The projection surface onto the side wall surface of the body includes at least a projection portion of the joint portion where the heat insulation wall on the front surface side of the heat insulation box body of the recess portion and the heat insulation wall on the bottom surface side of the recess portion are joined. A vacuum heat insulating material is provided in the foamed heat insulating material on the side wall surface of the heat insulating box body including the right and left wall surfaces of the recessed portion so as to straddle the projected portion of the internal space and the projected portion of the inner space of the heat insulating box body. It is characterized by being buried .

  Thereby, when integrally foaming the side wall and the recessed portion of the heat insulating box, the foaming pressure of the heat insulating material to be foam-filled is uniformly applied to the left and right wall surfaces, so that deformation such as wrinkles does not occur. Furthermore, since the structure composed of the outer box and the inner box is reinforced by the vacuum heat insulating material, deformation such as warpage can be prevented on the left and right wall surfaces of the heat insulating box.

  Moreover, when assembling after foaming the side wall and the recessed part of the heat insulation box separately, the rigidity is increased by embedding a vacuum heat insulating material around the connection surface with the recessed part of the side wall of the heat insulation box. Deformation such as warpage can be prevented on the left and right wall surfaces of the box.

  In addition, highly insulating the left and right wall surfaces of the part where the compressor is installed is a factor that causes a rise in the temperature of the compressor, but with the top surface arrangement in which the top surface direction of the compressor does not need to be covered with the heat insulating wall. It is possible because it is.

  The refrigerator according to the present invention eliminates the storage space in the upper and rear part which is difficult to use without reducing the internal volume, increases the storage amount of the easy-to-use lower drawer storage room, and prevents deformation of the left and right wall surfaces. This improves the appearance and appearance quality.

According to the first aspect of the present invention, there is provided a heat-insulating box body that partitions the interior with a heat-insulating wall formed of a foam heat-insulating body, a recessed portion provided at the rear of the top surface of the heat-insulating box body, and the recessed portion. The left and right wall surfaces of the recessed portion is filled with the foam insulation, and projected onto the side wall surface of the heat insulation box when the heat insulation box is viewed from the side. The projection portion of the internal space of the recess portion, including at least a projection portion of a joint portion where the heat insulation wall on the front side of the heat insulation box body of the recess portion and the heat insulation wall on the bottom surface side of the recess portion are joined. A vacuum heat insulating material is embedded in the foamed heat insulating material on the side wall surface of the heat insulating box body including the left and right wall surfaces of the recessed portion so as to straddle the projected portion of the inner space of the heat insulating box body. .

  As a result, the foaming pressure of the heat insulating body to be foam-filled is uniformly applied to the left and right wall surfaces, so that deformation such as wrinkles does not occur. Furthermore, since the structure composed of the outer box and the inner box is reinforced by the vacuum heat insulating material, deformation such as warpage can be prevented on the left and right wall surfaces of the recess.

  In addition, highly insulating the left and right wall surfaces of the part where the compressor is installed is a factor that causes a rise in the temperature of the compressor, but with the top surface arrangement in which the top surface direction of the compressor does not need to be covered with the heat insulating wall. It is possible because it is.

  Further, since the left and right wall surfaces are made of a heat insulating material filled with foam, vibration propagation can be attenuated, and noise generated from the compressor can also be attenuated. Furthermore, the multilayer of the vacuum heat insulating material and the foam-filled heat insulating material enables vibration and noise attenuation at a wider frequency than a single material.

  In addition, since vacuum insulation material with higher heat insulation performance than foam-filled insulation is used, energy saving is improved without increasing the internal volume by increasing the wall thickness, etc. is there.

  Moreover, in addition to the invention of Claim 1, the invention of Claim 2 is a foam of the said heat insulating body, after the said vacuum heat insulating material is coat | covered including the wall surface of 80% or more of the said heat insulation box side wall. Filling is performed.

  Accordingly, the vacuum heat insulating material can be attached to the entire wall surface in accordance with the rectangular shape of the left and right wall surfaces, and a large area can be covered without using an irregularly shaped vacuum heat insulating material in which the corner portion is cut. Covering the wall with a large piece of vacuum heat insulating material has a small heat loss due to heat conduction along the surface of the vacuum heat insulating material, and has a large energy saving effect. In addition, it is of course less expensive than a plurality of vacuum insulation materials. Furthermore, the number of steps is small compared to the use of an unusual vacuum heat insulating material, which is advantageous in terms of yield and management.

  Further, since the left and right wall surfaces can be largely covered, the structural strength of the entire left and right wall surfaces can be improved, and deformation such as warpage can be prevented.

The invention described in claim 3 is characterized in that, in addition to the invention described in claim 1 or 2, the vacuum heat insulating material embedded in the left and right wall surfaces is adhered and adhered to the outer box with an adhesive member. So
In addition to the thickness of the vacuum heat insulating material, foam filling of the heat insulating material only needs to be considered on one side of the vacuum heat insulating material, so that the left and right wall surfaces can be made thinner as compared with the case where it is arranged in the middle part. The width of the recess where the compressor is installed is the length obtained by subtracting the thickness of the left and right wall surfaces from the width of the heat insulation box. Therefore, to realize a type with a small installation width space, thinning the left and right wall surfaces is a part This is very advantageous in terms of storage.

  The invention according to claim 4 is characterized in that, in addition to the invention according to claims 1 to 3, the vacuum heat insulating material is formed by covering a sheet-like inorganic fiber aggregate with a gas barrier film and reducing the pressure inside. Therefore, it is possible to construct a thin vacuum insulating material with good flatness, which is advantageous for application to a heat insulating box having a relatively thin heat insulating wall.

  In addition, since it is in the form of a sheet, a plurality of thin sheets can be formed as necessary, and the thickness can be accommodated as needed, so that it is easy to cope with a thinner vacuum heat insulating material.

  Further, since inorganic fibers are used, gas generation with time in the vacuum heat insulating material is small, and the long-term reliability of the heat insulating box is improved.

(Embodiment 1)
1 is a schematic cross-sectional view of a refrigerator according to Embodiment 1 of the present invention, FIG. 2 is a cross-sectional view of a vacuum heat insulating material, and FIG. 3 is a schematic component development view of a heat insulating box. FIG. 4 is a surface development view excluding the front door portion of the refrigerator. In addition, the same code | symbol is attached | subjected about the same structure as background art.

  1 to 4, the heat insulation box 1 is divided into a plurality of heat insulation sections, and has a structure in which the upper part is a rotary door type and the lower part is a drawer type. From the top, there are a refrigerator room 2, a drawer-type switching chamber 29 and an ice making room 30, and a drawer-type vegetable room 4 and a drawer-type freezer room 3. The internal spaces of the refrigerator compartment 2, the switching chamber 29, the ice making chamber 30, the drawer-type vegetable compartment 4, the drawer-type freezer compartment 3, and the like are the space 1a inside the heat insulating box 1 inside. Each heat insulation section is provided with a heat insulation door via a gasket 31. From the top are the refrigerating room rotary door 5, the switching room drawer door 32, the ice making room drawer door 33, the vegetable room drawer door 7, and the freezer compartment drawer door 6.

  The refrigerator compartment revolving door 5 is provided with a door pocket 34 as a storage space, and a plurality of storage shelves 8 are provided in the cabinet. A storage case 35 is provided at the bottom of the refrigerator compartment 2.

  The heat insulating box 1 is a heat insulating wall formed by injecting a heat insulating body 24 that is foam-filled into a space formed by an inner box 22 in which a resin body such as ABS is vacuum-formed and an outer box 23 using a metal material such as a pre-coated steel plate. It has. As the heat insulator 24, for example, a hard urethane foam, a phenol foam, a styrene foam, or the like is used. Use of hydrocarbon-based cyclopentane as the foaming material is better from the viewpoint of preventing global warming.

  Further, a vacuum heat insulating material 25 is adhered and adhered to the space formed by the inner box 22 and the outer box 23 before foaming using an adhesive member (not shown) on the outer box side or the inner box side.

  This vacuum heat insulating material 25 is formed on the side wall surface of the heat insulating box 1 of the joint portion 10c where the heat insulating wall 10a on the bottom surface side of the recessed portion 10 and the heat insulating wall 10b on the front surface side of the heat insulating box body are joined. The side of the heat insulation box 1 that includes at least the projection part 10d and extends over the projection part 10f onto the side wall surface of the internal space 10e of the recess 10 and the projection part 1b onto the side wall surface of the space 1a inside the heat insulation box 1 A vacuum heat insulating material is embedded in an area of 80% or more, which is almost the entire wall surface.

  Further, the vacuum heat insulating material 25 is required to have a thin planar shape in order to be disposed in the wall thickness space of the heat insulating box 1. Further, an adhesive member such as hot melt is applied to the entire surface of the vacuum heat insulating material 25 so that air does not enter the bonded portion. The vacuum heat insulating material 25 having a heat insulating performance 5 to 20 times that of the heat insulating body 24 is foamed integrally with the heat insulating body 24 to constitute the heat insulating box 1 to improve performance.

  The vacuum heat insulating material 25 is composed of a ceramic fiber molded body 26 which is a sheet-like inorganic fiber aggregate and a gas barrier film 27 made of a plurality of materials covering the periphery thereof, and has a planar shape formed by decompressing the inside. It is a heat insulating material. The gas barrier film 27 maintains the reduced pressure state by welding the welded portion 28 after the pressure reduction. Since the film end portion requiring the welded portion 28 is longer than the other side, it is folded and fixed with an adhesive member (not shown).

  Further, the thickness of the sheet-like ceramic fiber molded body 26 can be easily changed by using a plurality of laminated layers having a predetermined thickness.

  Further, as shown in FIG. 3, the outer box 23 of the heat insulating box 1 has a shell 36, a bottom panel 37, a back panel 38, and a dent recessed at the rear of the top surface, the top surface of which is cut off and the steel plate is U-bent. The machine room panel 39 constituting the part 10 is assembled with a sealing property secured. The machine room panel 39 is formed by drawing a steel plate, and the corner portion 40 has an R shape for improving workability. The R shape secures a flow path at the branching or joining portion of the heat insulating body 24 to be foam-filled to improve fluidity, and can prevent generation of voids due to insufficient filling.

  The machine room panel 39 has the deepest arrangement part of the compressor 16 and a shape in which the restriction is shallower toward the left and right ends. Is improved.

  Further, the machine room panel 39 is provided with a plurality of air vent holes (not shown) on each surface, so that generation and deformation of voids due to residual air can be prevented.

  Since the machine room panel 39 is drawn, it is advantageous in terms of man-hours because it requires fewer sealing portions for foam filling, and if the same shape is formed by two parts of bent sheet metal, the cost of the drawing die is low. In addition, it is possible to improve the dimensional accuracy and finish without wrinkling.

  Further, the inner box 22 is slightly smaller than the outer box 23, and the rear back portion is recessed inward, and the space in which the heat insulating body 24 is foam-filled by being incorporated in the outer box 23 is a heat insulating box body. 1 is formed. Therefore, the left and right portions of the machine room panel 39 are also filled with the heat insulator 24 to form heat insulating walls.

  At this time, the vacuum heat insulating material 25 is attached to the outer box 23 or the inner box 22 and is assembled before foaming and filling the heat insulating body 24. An integral heat insulation wall is constructed to improve the performance.

  Next, the attachment position of the vacuum heat insulating material 25 will be described with reference to FIG. In FIG. 4, each surface of the heat insulation box 1 is unfolded, and a back surface is shown at the center, a top surface at the top, a bottom surface at the bottom, and side surfaces on the left and right. Moreover, the part corresponding to the left and right wall surface 42 of the recessed part 10 in the left and right wall surface 41 which is a side wall of the heat insulation box 1 is shown by the oblique line part. Here, the rectangular shape including the projection part 10d on the side wall surface of the joint part 10c where the heat insulation wall 10a on the bottom surface side of the recessed part 10 and the heat insulation wall 10b on the front surface side of the heat insulation box are joined, which is the most conspicuous part. The vacuum heat insulating material 25 is embedded in the left and right wall surfaces 41 of the heat insulating box 1 and is covered so as to include almost the entire portion corresponding to the left and right wall surfaces 42 of the recess 10. A vacuum heat insulating material 25 having an entire surface coated with an adhesive member such as hot melt is adhered and fixed to the shell 36 of the outer box 23 from the inside. The rectangular vacuum heat insulating material 25 can be affixed to the left and right wall surfaces 41 in a large area, and energy saving can be achieved at a lower cost compared to improving the covering area with a plurality of sheets or improving the covering area with an irregular shape. . Thus, since the vacuum heat insulating material 25 is coat | covered to the area | region of 80% or more of the left-right wall surface 41 of the heat insulation box 1, the rigidity of the left-right wall surface 41 can be improved significantly, Appearance deformation can be prevented.

  Further, in order to save energy, the heat insulating performance can be improved by attaching the vacuum heat insulating material 25 to the back panel 38, the bottom panel 37, or the like.

  Next, the temperature setting and cooling method of each heat insulation section will be described. The refrigerator compartment 2 is normally set at 1 to 5 ° C. with the lower limit of the temperature at which it is not frozen for refrigerated storage. Further, the storage case 35 is set at a relatively low temperature, for example, −3 to 1 ° C. for improving the freshness of meat fish and the like. The vegetable room 4 is often set to a temperature setting of 2 ° C. to 7 ° C., which is the same as or slightly higher than that of the refrigerator room 2. It is possible to maintain the freshness of leafy vegetables for a longer period as the temperature drops.

  The switching chamber 29 can change the temperature setting according to the user's setting, and can be set to a predetermined temperature setting from the freezer compartment temperature zone to the refrigeration and vegetable compartment temperature zones. The ice making chamber 30 is an independent ice storage chamber, and includes an automatic ice making device (not shown) and automatically produces and stores ice. Although it is a freezing temperature zone for storing ice, it can also be set at a freezing temperature of −18 ° C. to −10 ° C., which is relatively higher than the freezing temperature zone for the purpose of storing ice.

  The freezer compartment 3 is normally set at −22 to −18 ° C. for frozen storage, but may be set at a low temperature of −30 or −25 ° C., for example, to improve the frozen storage state.

  Each chamber is divided by a heat insulating wall in order to efficiently maintain different temperature settings. However, as a method of improving the heat insulating performance at a low cost, it is possible to perform foam filling together with the heat insulating body 24. Compared to the use of a heat insulating member such as polystyrene foam, the heat insulating performance can be increased by about twice, and the storage volume can be increased by thinning the partition.

  The refrigeration cycle is configured by connecting the compressor 16 disposed in the recess 10, a condenser (not shown), a capillary as a decompressor, and an evaporator 20 in an annular shape. The evaporator 20 performs forced convection heat exchange with a cooling fan 21. The condenser (not shown) may be forcibly air-cooled using a fan, may be a natural air-cooled type that is affixed to the inside of the outer box 23 with good heat transfer, or may be arranged in a partition between the heat insulating doors in each room. A pipe for installing and preventing drip-proofing may be combined.

  In addition, by using a flow path control means such as an electric three-way valve, a plurality of evaporators are used properly according to the partition configuration and temperature setting configuration, a plurality of capillaries are switched, and a gas cut is performed while the compressor 16 is stopped. Energy savings.

  Moreover, the evaporator 20 which is a component apparatus of a refrigerating cycle is provided in the back part of the vegetable compartment 4 located in the lowermost freezer compartment 3 and the middle stage with the cooling fan 21. FIG.

  The operation of the refrigeration cycle configured as described above will be described. The cooling operation is started by a signal from a control board (not shown) according to the set temperature in the cabinet. The high-temperature and high-pressure refrigerant discharged by the operation of the compressor 16 dissipates heat in the condenser and is condensed and liquefied, and is decompressed by the capillary to become a low-temperature and low-pressure liquid refrigerant and reaches the evaporator 20.

  By the operation of the cooling fan 21, heat is exchanged with the air in the cabinet, and the refrigerant in the evaporator 20 is evaporated. Each room is cooled by distributing low-temperature cold air with a damper (not shown). When a plurality of evaporators or decompressors are used, the refrigerant is supplied to the necessary evaporator 20 by the flow path control means. The refrigerant exiting the evaporator 20 is sucked into the compressor 16. Thus, the inside of the cabinet is cooled by repeating the cycle operation.

  When the cooling operation is performed, a temperature difference occurs inside and outside the heat insulating box 1. Since the heat insulator 24 also shrinks at a low temperature, a stress that causes external deformation is generated. A portion where the heat insulating wall is in perpendicular contact with the left and right wall surfaces 41 as a place where a large stress is generated. For example, the partition part of the heat insulating compartment that has been integrally foamed is a part that comes into contact with the left and right side surfaces 41, and the part that contacts the heat insulating walls on the front and bottom surfaces of the recess 10 and the left and right side surfaces 41. This part is stressed so as to dent the left and right wall surfaces 41 due to the shrinkage of the heat insulating wall. However, since the vacuum heat insulating material 25 is attached to the outer box 23 so as to cover this part, a local force is applied to the shell 36. Can be prevented from working and deforming.

  Further, the left and right wall surfaces 42 of the recess 10 are in contact with the machine room where the inside of the heat insulator 24 is higher than the ambient temperature, and the shrinkage is clearly different from other parts of the left and right wall surfaces 41. However, since the left and right wall surfaces 42 of the recessed portion 10 are covered with the vacuum heat insulating material 25, the left and right wall surfaces 42 are reinforced, and the resistance to deformation is increased, so that deformation can be prevented.

  In addition, since the heat insulator 24 is integrally foam-filled up to the left and right wall surfaces 42 of the recess 10 even during foam filling, a uniform foaming pressure is applied to the left and right wall surfaces 41 of the heat insulation box 1, so that wrinkles, etc. There is no deformation.

  Note that highly insulating the left and right wall surfaces 42 of the recess 10 in which the compressor 16 is disposed causes the temperature of the compressor 16 to rise, but the top surface direction of the compressor 16 is not covered with the heat insulating wall. This is possible because of the top surface layout.

  Furthermore, noise and vibration generated by the operation of the refrigeration cycle are also constituted by the heat insulating body 24 and the vacuum heat insulating material 25 in which the left and right wall surfaces 42 of the recessed portion 10 in which the compressor 16 is disposed are filled with foam. It is possible to attenuate the propagation of noise vibration by significantly improving the rigidity of the foam structure of the foam, and furthermore, the noise of a wider frequency than that of a single material due to the multilayer of the vacuum heat insulating material 25 and the heat insulating body 24. Vibration damping is possible.

  In addition, the condenser of the refrigeration cycle is composed of the heat insulator 24 and the vacuum heat insulating material 25 even on the left and right wall surfaces of the condenser installation place that is generated when the cover is attached by placing it in a place where the top of the refrigerator is recessed. By doing so, the same effect can be obtained.

  In addition, even if the recessed portion 10 in which the compressor 16 is disposed reaches not only the back of the top surface of the heat insulating box 1 but also the front surface, the same effect can be obtained by embedding the vacuum heat insulating material 25 in the side wall. can get.

  In addition, in this Embodiment, although the vacuum heat insulating material 25 is embed | buried in the area | region of 80% or more of a side wall surface, the heat insulation wall 10a by the side of the bottom face of the recessed part 10 which is a part where deformation | transformation is most conspicuous, and the heat insulation box front surface By embedding a vacuum heat insulating material in a portion including at least the projection part 10d on the side wall surface of the joint part 10c to which the side heat insulation wall 10b is joined, deformation of the upper part of the side wall can be prevented. In this way, when the insulating body is foamed and filled after the vacuum heat insulating material is embedded, the foaming pressure of the insulating material to be foam-filled is uniformly left and right wall surfaces when the side wall and the recessed portion of the heat insulating box are integrally foamed. To prevent deformation such as wrinkles. Furthermore, since the structure composed of the outer box and the inner box is reinforced by the vacuum heat insulating material, deformation such as warpage can be prevented on the left and right wall surfaces of the heat insulating box.

  Moreover, when assembling after foaming the side wall and the recessed part of a heat insulation box separately, it joins with the heat insulation wall 10b of the heat insulation box front side which is a connection surface with the recessed part of the side wall of a heat insulation box. By embedding a vacuum heat insulating material around the projection portion 10d on the side wall of the heat insulating box 1 of the portion 10c, rigidity is increased, and deformation such as warpage can be prevented on the left and right wall surfaces of the heat insulating box.

  As described above, the refrigerator of the present invention eliminates the upper and lower storage spaces that are difficult to use without reducing the internal volume, increases the storage capacity of the easy-to-use lower drawer-type storage chamber, In addition to ensuring sufficient internal volume and depth of the lowermost storage room to prevent appearance deformation and improve appearance and appearance quality, it is possible to reduce the depth of the back of the top of the chamber, It can also be applied to commercial refrigerators and refrigeration equipment such as freezers and showcases.

Schematic sectional view of the refrigerator in the first embodiment of the present invention. Sectional drawing of the vacuum heat insulating material in Embodiment 1 of this invention Schematic component development view of a heat insulation box in Embodiment 1 of the present invention Plane development view excluding the front door portion of the refrigerator in the first embodiment of the present invention. Schematic sectional view of a conventional refrigerator

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Heat insulation box 1a Inside space of heat insulation box 1b Projection part to side wall surface of space inside heat insulation box 2 Refrigerating room (upper storage room)
3 Freezing room (lower storage room)
4 Vegetable room (lower storage room)
5 Refrigerating room revolving door 6 Freezing room drawer door 7 Vegetable room drawer door 10 Recessed portion 10a Insulating wall on the bottom side of the recessed portion 10b Insulating wall on the front side of the heat insulating box body of the recessed portion 10c Joint portion 10d Projecting the joint portion to the side wall surface Projected portion 10e Internal space of the recessed portion 10f Projected portion on the side wall surface of the inner space of the recessed portion 16 Compressor 20 Evaporator 21 Cooling fan 22 Inner box 23 Outer box 24 Heat insulator 25 Vacuum heat insulating material 26 Sheet-like inorganic fiber assembly Body 27 Gas barrier film 28 Welding part 29 Switching room (lower storage room)
30 Ice making room (lower storage room)
36 Shell 39 Machine room panel 41 Left and right wall surface of heat insulation box 42 Left and right wall surface of recess

Claims (4)

What was provided with the heat insulation box which divides and forms the inside with the heat insulation wall formed with the foam heat insulation, the dent part provided in the top back of the heat insulation box, and the compressor arranged in the dent part The left and right wall surfaces of the recess are filled with the foam insulation, and the heat insulation of the recess is projected on the side wall surface of the heat insulation box viewed from the side. Projection of the projection part of the interior space of the recess and the interior space of the insulation box including at least the projection part of the joint part where the heat insulation wall on the front side of the box and the heat insulation wall on the bottom side of the recess are joined The refrigerator which embedded the vacuum heat insulating material in the said foam heat insulation of the side wall surface of the said heat insulation box including the right and left wall surface of the said recessed part so that it might straddle a part.   The refrigerator according to claim 1, wherein the heat insulating body is filled with foam after the vacuum heat insulating material is covered including a wall surface of 80% or more of the side wall surface of the heat insulating box.   The refrigerator according to claim 1 or 2, wherein the vacuum heat insulating material embedded in the left and right wall surfaces is adhered and adhered to the outer box with an adhesive member.   The refrigerator according to any one of claims 1 to 3, wherein the vacuum heat insulating material is obtained by covering a sheet-like inorganic fiber aggregate with a gas barrier film and depressurizing the inside.

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