JP2013234809A - Refrigerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve a problem caused when a vacuum heat insulating material is bent and disposed in a bent part, wherein a gap passage in the bent part is narrowed so that the flow resistance of urethane is increased and a foaming agent is hardly filled in the entire refrigerator.SOLUTION: An L-shaped holding member 51 for holding a vacuum heat insulating material 52 with an enlarged thickness is provided in a bent part 48 of a casing 44 of a refrigerator 43. After the vacuum heat insulating material 52 is installed in the holding member 51, the urethane is filled between an inner box 45 and an outer case 46 by froth foaming. By this arrangement, the load bearing in the bent part is improved while enhancing the filling property of the urethane, and thereby the rigidity of the casing of the refrigerator can be enhanced.

Description

  The present invention relates to a refrigerator in which a vacuum heat insulating material is disposed at a bent portion of a refrigerator casing.

  Conventionally, there is a refrigerator of this type in which a deformation holding member is disposed between cores and the vacuum heat insulating material 30 is bent (see, for example, Patent Document 1).

  FIG. 3 shows a conventional refrigerator described in Patent Document 1. As shown in FIG. FIG. 4 is an enlarged cross-sectional view of a portion C in FIG. As shown in FIG. 3, the vacuum heat insulating material 30 is a vacuum heat insulating material disposed along the bent portion 24 of the heat insulating wall, and when installed on the inner box 21 side of the bent portion 24, the shape of the inner box 21. Is installed in close contact with the inner box 21. Further, when the vacuum heat insulating material 30 is installed on the outer box 23 side of the bent portion 24, it is installed along the shape of the outer box 23.

  The bent portion 24 of the heat insulating wall is a portion constituting a deformed portion of the heat insulating wall. And the deformation | transformation part which is an uneven | corrugated | grooved part etc. in the inner box 21 or the outer box 23 other than the bending part 24 which is a corner | angular part where the two surfaces in the inner box 21 or the outer box 23 cross | intersect the deformation | transformation part of the heat insulation wall. included.

  The vacuum heat insulating material 80 is a vacuum heat insulating material provided in the flat surface portion of the heat insulating wall, and is a vacuum heat insulating material provided in the heat insulating wall without bending the vacuum heat insulating material 30 and in a planar shape. . The end of the vacuum heat insulating material 80 installed along one surface (back surface) of the outer box 23 extends from the one surface (upper surface or bottom surface) of the inner box 21 along the other surface (back surface) via the bent portion 24. Polymerization occurs at the end of the heat insulating material 30 and the projection surface. With such a configuration, the installation area of the vacuum heat insulating materials 30 and 80 can be increased while ensuring the filling property of the foam heat insulating material 22, and the heat insulating performance can be improved. Next, the vacuum heat insulating material applied to the bending part 24 is demonstrated with reference to FIG.

  In FIG. 4, a vacuum heat insulating material 30 is a vacuum heat insulating material disposed so as to be in close contact with the inner box surface 21a along the shape of the inner box surface 21a of the bent portion 24 of the heat insulating wall. A core material 32 made of an inorganic fiber polymer not containing a binder is housed in a material 31 together with a deformation holding member 33 containing a getter agent that adsorbs a gas, and is vacuumed at a predetermined degree of vacuum. It is configured to be sealed.

  As the inorganic fiber polymer constituting the core material 32, a highly versatile polymer having an average fiber diameter of 3 μm to 5 μm is used, and the peak value of the fiber diameter distribution used for the conventional vacuum heat insulating material is 1 μm or less, and is 0.003. Compared with a super fine inorganic fiber of 1 μm or more, the fiber can be remarkably inexpensive and the bendability is remarkably good. As the core material 32, an organic fiber polymer may be used instead of the inorganic fiber polymer.

  When the vacuum heat insulating material 30 is manufactured, the vacuum heat insulating material 30 is manufactured in a substantially planar shape so that the productivity of the vacuum heat insulating material 30 itself can be improved. And when incorporating the vacuum heat insulating material 30 manufactured as a substantially planar shape into the box body 20 of the refrigerator, as described above, the vacuum heat insulation is performed so as to closely adhere to the shape of the inner box surface 21a of the bent portion 24. The material 30 is installed in a bent state.

Therefore, as shown in FIG. 4, the inorganic insulating fiber 30 can be bent so that the vacuum heat insulating material 30 manufactured as a substantially planar shape can be bent at a predetermined curved radius and a predetermined angle. Between the core material 32 formed of a polymer, a deformation holding member 33 formed of a fibrous mat made of a biodegradable material or a deformation holding formed by packing a powder made of a biodegradable material into a non-woven bag. A member 33 is interposed. By using a biodegradable material as the deformation holding member 33, it can be made environmentally friendly.

  A core member 32 having a predetermined thickness is formed of a plurality of layers 32a and 32b, and a deformation holding member 33 is installed between the plurality of layers 32a and 32b, whereby the vacuum heat insulating material 30 is formed into a predetermined curved surface. Even if it is bent at a predetermined angle with a radius, the inorganic fiber polymer constituting the layers 32a and 32b of the core material 32 is less damaged and the damage to the jacket material 31 due to the inorganic fiber polymer is reduced. It is configured as follows.

  That is, when the deformation holding member 33 is not installed between the core members 32, it is forcibly compressed at the inner surface radius portion of the core member 32, or is forcibly pulled at the outer surface radius portion of the core member 32. Since the force is received, the inorganic fiber polymer forming the core member 32 may be broken at a certain ratio.

  On the other hand, since the core material 32 is separated into the plurality of layers 32a and 32b by the deformation holding member 33, when the vacuum heat insulating material 30 is bent, the plurality of layers 32a or 32b bend independently. The amount of compression forcibly compressed in the inner radius portion or outer radius portion of the layer 32a is smaller than in the case where the deformation holding member 33 is not installed, or the inner radius portion or outer surface of the layer 32b. The amount that is forcibly pulled in the radius portion is smaller than that in the case where the deformation holding member 33 is not installed. Thus, the degree of destruction of the inorganic fiber polymer forming the layer 32a and the layer 32b is reduced, and the damage to the covering material 31 by the inorganic fiber polymer is reduced.

JP 2007-55973 A

  However, in the conventional configuration, when the vacuum heat insulating material is bent and disposed at the bent portion, the gap passage at the bent portion is narrowed, so that the flow resistance of urethane is increased and the foaming agent is difficult to fill the entire refrigerator. It had the problem that.

  The present invention solves the above-mentioned conventional problems, and provides a refrigerator having high load resistance at a bent portion without impairing the filling property of urethane even when a vacuum heat insulating material is disposed at the bent portion. With the goal.

  In order to solve the above-described conventional problems, the refrigerator of the present invention is a refrigerator in which a vacuum heat insulating material is disposed between an inner box and an outer box, and a holding member that holds the vacuum heat insulating material at a bent portion of the refrigerator housing. After disposing and installing the vacuum heat insulating material on the holding member, urethane filling by floss foaming is performed between the inner box and the outer box.

  As a result, since urethane is filled by floss foaming with good fluidity, even if the gap passage of the bent portion becomes narrow due to the arrangement of the vacuum heat insulating material, the urethane filling property is prevented from being lowered, and the L-shaped Since the vacuum heat insulating material is housed in the holding member, the load resistance at the bent portion is improved and the rigidity of the refrigerator casing is increased.

Since the refrigerator of the present invention is filled with urethane by froth foaming with good fluidity, even if the gap passage of the bent portion becomes narrow due to the arrangement of the vacuum heat insulating material, the filling property of urethane is prevented from being lowered. Since the vacuum heat insulating material is housed in the L-shaped holding member, the load resistance at the bent part is improved, the rigidity of the refrigerator case is increased, and the vibration sound caused by slight shaking of the refrigerator case is generated. Can be suppressed.

The longitudinal cross-sectional view of the refrigerator in Embodiment 1 of this invention Sectional drawing of the bent part periphery of the refrigerator in Embodiment 1 of this invention Longitudinal sectional view of a conventional vacuum heat insulating material and a refrigerator using the same Sectional drawing which expanded the bending part of the conventional refrigerator

  1st invention arrange | positions the holding member which hold | maintains a vacuum heat insulating material in the bending part of a refrigerator housing | casing in the refrigerator by which a vacuum heat insulating material is arrange | positioned between an inner box and an outer box, The said vacuum is set to the said holding member. After installing the heat insulating material, urethane filling is performed between the inner box and the outer box by froth foaming, and the urethane is filled by floss foaming with good fluidity. Even if it becomes narrow due to the arrangement of the material, it is possible to improve the heat insulation performance at the bent portion while preventing the filling property of urethane from being lowered, and the vacuum heat insulating material is housed in the L-shaped holding member Therefore, the load resistance at the bent part is improved compared to the case where the vacuum heat insulating material is arranged alone, the rigidity of the refrigerator case is increased, and the vibration noise caused by the slight shaking of the refrigerator case is suppressed. Can do.

  According to a second invention, in the first invention, the holding member is configured in an L shape, and the vacuum heat insulating material is inserted into the holding member, and the arrangement of the vacuum heat insulating material becomes very simple. The number of work steps associated with the placement of the vacuum heat insulating material can be greatly reduced.

  According to a third invention, in the first or second invention, the surface of the holding member positioned on the outer box side is subjected to a polishing treatment so that the foam material is easily filled. At this time, the urethane flowing along the surface of the holding member is easy to flow, and it is possible to prevent the filling property of the urethane from being lowered.

  According to a fourth invention, in any one of the first to third inventions, the holding member is made of a resin having a higher strength than the vacuum heat insulating material, and a vacuum heat insulating material having a large thickness at a bent portion. Even if it arrange | positions, the said holding member can maintain the intensity | strength of a refrigerator housing | casing.

  According to a fifth invention, in any one of the first to fourth inventions, the surface of the holding member located on the inner box side and the inner box are coupled with an adhesive member to improve the rigidity of the refrigerator casing. Thus, the weight of the mechanical parts constituting the refrigeration cycle installed in the machine room can be supported, and the sound vibration of the refrigerator casing caused by the compressor can be suppressed.

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

(Embodiment 1)
FIG. 1 is a longitudinal sectional view of a refrigerator in the first embodiment of the present invention. FIG. 2 shows a cross-sectional view around the bent portion of the refrigerator in the first embodiment of the present invention.

1 and FIG. 2, a storage room for the refrigerator 43 is constituted by a refrigerator room 40 for storing food in a refrigerator, a freezer room 41 for storing food in a frozen state, and a vegetable room 42 for storing food such as vegetables in a refrigerator. Yes. The housing 44 of the refrigerator 43 is configured by filling urethane foam between the inner box 45 and the outer box 46. Moreover, in order to improve the heat insulation performance of the refrigerator 43 between the inner box 45 and the outer box 46,
A vacuum insulation is provided. A bent portion 48 is provided on the upper rear surface of the housing 44 of the refrigerator 43, and a machine room 50 in which mechanical parts such as a compressor 49 are placed is disposed. An L-shaped holding member 51 is joined to the inner box 45 forming the bent portion 48 with an adhesive or the like, and the vacuum heat insulating material 52 is inserted into the holding member 51. As the material of the holding member 51, a specific resin that is not significantly inferior in heat insulation performance and strength is selected as compared with urethane foam. Further, the surface of the holding member 51 located on the outer box 46 side is subjected to a polishing process so as to be easily filled with urethane foam.

  About the refrigerator comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  First, the holding member 51 is provided in the inner box 45 of the portion where the bent portion 48 is formed, and the thick vacuum heat insulating material 52 is inserted into the holding member 51, so that it is placed on the upper portion of the bent portion 48. The load of the machine room 50 in which the mechanical parts such as the compressor 49 are disposed acts on the frame of the holding member 51 and does not directly act on the vacuum heat insulating material 52. Therefore, the thick vacuum heat insulating material 52 It is possible to prevent the deformation and breakage. Further, since the L-shaped holding member 51 disposed in the bent portion 48 is adhered and fixed to the surface in contact with the inner box 45 side by an adhesive member, the load of the machine chamber 50 acting on the vertically lower side is reduced to L It is arranged to be received not only on the lower surface but also on the rear surface of the letter-shaped holding member 51, and the inner box 45 is prevented from being bent by a load on the vertical lower side of the machine room 50. Further, since the urethane foam is filled between the inner box 45 and the outer box 46, the back surface of the L-shaped holding member 51 and the inner box 45 are firmly fixed, and the vertical of the machine chamber 50 acting on the holding member 51. It is possible to more firmly support the downward load.

  Moreover, since the method of inserting the vacuum heat insulating material 52 into the holding member 51 that has been previously formed with a resin in a predetermined structure is employed, the operation becomes very simple and the surface of the vacuum heat insulating material 52 lacking flatness and the internal Compared with the case where the box 45 is directly bonded, the bonded portion becomes stronger and the holding member 51 serves as a reinforcing member for the bent portion 48, so that the rigidity of the refrigerator 43 can be increased. The sound vibration of the compressor 49 in the machine room 50 is reduced by the holding member 51 having a function as a reinforcing member, and is difficult to transmit to the inner box 45.

  Further, since the L-shaped holding member 51 having the vacuum heat insulating material 52 built in the bent portion 48 is disposed, the gap passage between the bent portion 48 and the inner box 45 and the outer box 46 becomes narrower, but the fluidity is reduced. Since the filling of urethane is performed by good floss foaming, it is possible to prevent the filling failure where the urethane does not rotate, and to arrange the thick vacuum heat insulating material 52, and to improve the heat insulating performance of the refrigerator 43. be able to. And since the grinding | polishing process is performed so that the foam material may be easily filled in the surface located in the outer case 46 side of the holding member 51, it becomes possible for urethane to pass the surface of the holding member 51 smoothly. .

  As described above, in the present embodiment, in the refrigerator 43 in which the vacuum heat insulating material 52 is arranged between the inner box 45 and the outer box 46, the vacuum heat insulating material in which the thickness is increased in the bent portion 48 of the housing 44. An L-shaped holding member 51 for holding 52 is disposed, and after the vacuum heat insulating material 52 is installed on the holding member 51, urethane filling by floss foaming is performed between the inner box 45 and the outer box 46. Since the urethane is filled by floss foaming with good fluidity, even if the gap passage of the bent portion 48 becomes narrow due to the arrangement of the vacuum heat insulating material 52, it is possible to prevent the filling property of the urethane from being lowered. And since the vacuum heat insulating material 52 is accommodated in the L-shaped holding member 51, the load resistance at the bent portion 48 is improved, the rigidity of the casing 44 of the refrigerator 43 is increased, and the inside of the machine room 50 is increased. Generation of sound vibration caused by the compressor 49 can also be reduced.

As described above, the refrigerator according to the present invention can reduce the amount of heat entering the cabinet by disposing a thick vacuum heat insulating material at the bent portion, so that a large-sized refrigerator or showcase for business use. It can also be applied to other uses.

40 refrigerator compartment 41 freezer compartment 42 vegetable compartment 43 refrigerator 44 housing 45 inner box 46 outer box 48 bent portion 49 compressor 50 machine room 51 holding member 52 vacuum heat insulating material

Claims (5)

In the refrigerator in which the vacuum heat insulating material is disposed between the inner box and the outer box, after the holding member that holds the vacuum heat insulating material is disposed in the bent portion of the refrigerator case, and after the vacuum heat insulating material is installed on the holding member The refrigerator is filled with urethane by froth foaming between the inner box and the outer box. The refrigerator according to claim 1, wherein the holding member is configured in an L shape, and the vacuum heat insulating material is inserted into the holding member. The refrigerator according to claim 1 or 2, wherein a polishing process is performed so that a foam material is easily filled on a surface of the holding member located on the outer box side. The refrigerator according to any one of claims 1 to 3, wherein the holding member is made of a resin having higher strength than the vacuum heat insulating material. The surface of the holding member on the inner box side and the inner box are coupled with an adhesive member to improve the rigidity of the refrigerator casing. refrigerator.