JP2012063039A - Refrigerator - Google Patents

Abstract

A refrigerator capable of reducing the risk of damaging the outer packaging material of the vacuum heat insulating material when arranging the vacuum heat insulating material on the inner surface of the outer box and sufficiently filling the heat insulating partition wall with the foam heat insulating material. provide.
The refrigerator 1 according to the present invention is arranged inside the outer box 19 when the vacuum heat insulating material 21 is arranged so as to cover the heat radiating pipe 20 extending on the inner surface of the side plate 11 as the outer box 19. An edge of the end recess 22a of the vacuum heat insulating material 21 covering the heat radiating pipe 20 disposed closest to the flange portion 19b of the outer box 19 that locks the inner box 18 is formed in the heat insulating partition wall 60. It is located in the projection surface of the communication port 61 (foaming heat insulating material intake port).
[Selection] Figure 16

Description

  The present invention relates to a refrigerator provided with a vacuum heat insulating material.

Conventionally, from the viewpoint of preventing global warming and the like, energy saving is also required in refrigerators for the purpose of reducing CO ₂ emissions.
For this reason, commercial refrigerators are used in combination with a hard urethane foam (foamed heat insulating material) that foams a vacuum heat insulating material with excellent heat insulating performance at the manufacturing site.

  Although this vacuum heat insulating material has a heat insulating performance of 10 times or more as compared with the foam heat insulating material to be foamed at the manufacturing site, the outer covering material covering the outside is an aluminum vapor deposition film and is easily damaged. There is also a difficulty that the material is depressurized to make the inside vacuum, and hardened because atmospheric pressure is applied to the outer surface.

Therefore, it has been difficult to apply the vacuum heat insulating material to a refrigerator such as a refrigerator in terms of workability.
That is, even if the vacuum heat insulating material is applied to the side plate or the back plate forming the refrigerator outer box, a recess (groove) for escaping the heat radiating pipe must be made on the vacuum heat insulating material side using a jig or the like. Also, if it is near the flange on the opening side (door side) of the outer box that locks the inner box, it will continue to the flange because it is necessary to prevent the vacuum heat insulating material from contacting the locking part that follows the flange. In order to separate the locking part and the vacuum heat insulating material, the heat radiation pipe cannot be covered with the vacuum heat insulating material unless the heat radiation pipe is separated to some extent from the flange part of the outer box in relation to the recess of the vacuum heat insulating material. It has become.

For example, a conventional vacuum heat insulating material has a recess (a groove having an opening of 50 mm and a depth of 5 mm) that houses a heat radiating pipe (for example, a diameter of 4.0 mm) on the vacuum heat insulating material side as disclosed in Patent Document 1. have.
The recess of the vacuum heat insulating material is formed by covering a core material such as a fiber material with an outer packaging material, sealing the interior by reducing the pressure, and then pressing the outer packaging material by press molding.
And when installing this vacuum heat insulating material on the side plate of the refrigerator, etc., cover the heat radiation pipe previously arranged on the side surface plate with the recess formed in the vacuum heat insulating material, and cover the vacuum heat insulating material with hot melt. It is attached to the inner surface (insulating material side) such as a side plate so that there is no gap.
Note that hot melt is used to join the vacuum heat insulating material to the side plate, etc. If there is a gap between the vacuum heat insulating material and the side plate, etc. when filling the foam heat insulating material, the stock solution of the foam heat insulating material enters this gap. Foaming and deforming the side plate or the like, or the end of the vacuum insulation material is peeled off from the side plate of the outer box and the foam insulation material does not interfere with the flow of the foam insulation material It is for doing so.

On the other hand, conventionally, a refrigerator is known in which a heat insulating partition wall in a refrigerator is filled with a foam heat insulating material (see, for example, Patent Document 2).
Next, FIG. 17 to be referred to is a partially enlarged sectional view showing a partially enlarged longitudinal section of a heat insulating partition wall in a conventional refrigerator. FIG. 18 is a partially enlarged cross-sectional view showing a partially enlarged cross section of a heat insulating partition wall in a conventional refrigerator, and a communication port for taking in a foam heat insulating material that expands by foaming into the heat insulating partition wall; It is a figure which shows the positional relationship with a vacuum heat insulating material.
In addition, the front (door side) of the refrigerator is partially shown on the left side of FIG. 17 and the inner side of the refrigerator is partially shown on the right side of FIG. Moreover, the up-down direction of the paper surface of FIG. 17 is matched with the up-down direction of the refrigerator.

  FIG. 18 shows a state in which the refrigerator is arranged so that the opening side of the refrigerator (the front side of the refrigerator to which the door is attached) faces downward in the vertical direction in order to fill the heat insulating partition wall with the foam insulation. The front side of the refrigerator is partially shown on the lower side of the page of FIG. 18, and the upper side of the page of FIG. 18 is made to coincide with the rear side of the refrigerator. In addition, the outside of the refrigerator is partially shown on the left side of FIG. 18 through the side plate of the refrigerator, and the inside of the refrigerator is partially shown on the right side of the page through the side plate of the refrigerator.

As shown in FIG. 17, the heat insulating partition wall 60 is formed of a substantially plate body in which the foamed heat insulating material 17 is filled in the hollow portion inside. The heat insulating partition wall 60 partitions the refrigerator 100 in the vertical direction to insulate the refrigerator compartment 2 and the freezer compartment 3 from heat.
In FIG. 17, reference numeral 5 denotes a lower end portion of a double door (refrigeration chamber door) for closing the front opening of the refrigerator compartment 2, and reference numeral 6 denotes a drawer for closing the front opening of the freezer compartment 3. Reference numeral 20 denotes an upper end portion of the door (freezer compartment door), and reference numeral 20 denotes a heat radiating pipe extending in the width direction of the refrigerator 100 (perpendicular to the paper surface of FIG. 17) along the front end surface of the heat insulating partition wall 60. is there. Reference numeral 33 denotes a packing that seals between the front end face of the heat insulating partition wall 60 and the doors 5 and 6 when the doors 5 and 6 are closed. An opening for incorporating the foam insulation 17 will be described in more detail below with reference to FIG.

  As shown in FIG. 18, the heat insulating partition wall 60 has an opening 60 a on its side surface that communicates with a heat insulating space 63 formed between the outer box 19 and the inner box 18 of the refrigerator 100. An opening 18b is formed in the inner box 18 at a position corresponding to the opening 60a. That is, the uncured foam heat insulating material 17 is put into the heat insulating partition wall 60 through the openings 18b and 60a (hereinafter, the openings 18b and 60a are collectively referred to as the communication port 61) as described below. It comes to capture.

  The refrigerator 100 is arranged so that the front end face of the heat insulating partition wall 60 faces downward in the vertical direction, and a urethane foam stock solution (raw material solution of the foam heat insulating material 17) is introduced into the heat insulating space 63 from a predetermined inlet (not shown). When injected, this urethane foam stock solution forms a urethane foam stock solution 56 a in the vicinity of the flange portion 19 b that becomes the joint between the outer box 19 and the inner box 18. The urethane foam stock solution foams and the uncured foam heat insulating material 17 rises in the heat insulating space 63, and the uncured foam heat insulating material 17 is connected to the inside of the heat insulating partition wall 60 through the communication port 61. It is taken in and spreads. Thereafter, the uncured foam heat insulating material 17 filled inside the heat insulating space 63 and the heat insulating partition wall 60 is cured, whereby the foam heat insulating material 17 made of a hard urethane foam is formed.

The front end of the communication port 61 is normally set to a position (position offset upward in FIG. 18) that is retreated by a dimension of about 30 to 40 mm (indicated by W5 in FIG. 18) from the front end surface of the heat insulating partition wall 60. Yes.
Incidentally, in FIG. 18, reference numeral 20 denotes a heat radiating pipe extending so as to meander along the inner surface of the side plate 11 constituting the outer box 19, reference numeral 56 denotes a vacuum heat insulating material, and reference numeral 22 denotes , A recess (groove) formed in the vacuum heat insulating material 56 so that the heat radiating pipe 20 is received and accommodated in the vacuum heat insulating material 56, reference numeral 59 is a convex portion of the vacuum heat insulating material 56, and reference numeral 19b is It is a flange portion for locking the inner box 18 and the front plate 62 forming the front end face of the heat insulating partition wall 60 to the outer box 19.

The heat radiating pipe 20 shown in FIG. 18 is arranged so as to meander on the inner surface of the side plate 11 so as to be bent back multiple times, and is disposed closest to the flange portion 19b, and is arranged in the vertical direction of the refrigerator 1 (in FIG. 18). Only the straight pipe portion extending in the direction perpendicular to the paper surface is shown.
The portion of the heat radiating pipe 20 arranged closest to the flange portion 19b has a function as a condenser of the refrigeration cycle, and the flange portion 19b is cooled and condensed through the inner box 18 having a low temperature in the refrigerator 1. And has a function to prevent by the dissipated heat.

Japanese Patent No. 3456988 JP 2004-225946 A

However, in the conventional vacuum heat insulating material 56, as described above, the recess 22 (groove) for receiving the heat radiating pipe 20 is formed by press molding. Therefore, when forming the recess 22, the outer packaging material of the vacuum heat insulating material 56 is used. The amount of deformation (elongation amount) may increase and damage the outer packaging material. Therefore, in the conventional vacuum heat insulating material 56, in order to prevent damage to the outer packaging material, the length L3 of the convex portion 59 for forming the outermost recess 22 (groove) is set to 30 as shown in FIG. By making the length approximately ˜40 mm, the deformation amount of the outer packaging material at the time of press molding is reduced (so that the deformation amount can be absorbed).
However, in the conventional vacuum heat insulating material 56, when the length L3 of the convex portion 59 is increased, the tip of the convex portion 59 is moved to the flange portion 19b (particularly, the locking portion 55k between the inner box 18 and the outer box 19). ) Will cause a new problem of damaging the outer packaging material.

Further, when the heat radiating pipe 20 portion disposed closest to the flange portion 19b is brought close to the flange portion 19b to prevent condensation efficiently, the tip of the convex portion 59 approaches the urethane foam stock solution reservoir 56a. And since the plate | board thickness (thickness of the convex part 59) of a vacuum heat insulating material is 10-15 mm normally, since the width | variety of the heat insulation space 63 is 20-30 mm, the front-end | tip of the convex part 59 is urethane. If it is too close to the foam stock solution reservoir 56a, the tip of the convex portion 59 closes the upper half of the urethane foam stock solution reservoir 56a. As a result, when the uncured foam heat insulating material 17 formed by foaming of the urethane foam stock solution in the urethane foam stock solution 56a tries to expand upward above the heat insulating space 63, the tip of the convex portion 59 is uncured. This prevents the upward expansion of the foam heat insulating material 17.
Therefore, in the structure of the refrigerator 100 having the conventional vacuum heat insulating material 56, the uncured foam heat insulating material 17 is not efficiently taken into the heat insulating partition wall 60 through the communication port 61, and the heat insulating partition wall 60. In some cases, the foam insulation 17 is not sufficiently filled therein.

  Therefore, the problem of the present invention is that the risk of damaging the outer packaging material of the vacuum heat insulating material when the vacuum heat insulating material is arranged on the inner surface of the outer box is reduced, and the heat insulating partition wall is sufficiently filled with the foam heat insulating material. It is to provide a refrigerator that can.

The present inventors, unlike a conventional manufacturing method by press forming of a vacuum heat insulating material, etc., even if the bank portion is not ensured long at the end of the vacuum heat insulating material, and even if the bank portion is not formed, The present inventors have found a manufacturing method that can reduce the risk of damage to the outer packaging material due to the deformation amount (elongation amount) of the outer packaging material at the time of manufacture, and reached the present invention.
That is, according to the present invention for solving the above-described problems, the inner box disposed inside the outer box is locked via the flange portion formed in the opening of the outer box, and along the inner surface of the outer box. A heat insulating partition wall that covers the extended heat radiating pipe with a vacuum heat insulating material, fills the heat insulating space between the outer box and the inner box with a foam heat insulating material, and partitions the inner space of the inner box In the refrigerator filled with foam insulation, the end recess of the vacuum insulation covering the heat radiating pipe portion arranged closest to the flange portion has a concave shape with the outside open. Provided along the edge of the vacuum heat insulating material, the edge of the end recess on the flange part side is formed on the heat insulating partition wall so as to communicate with the heat insulating space and the heat insulating partition wall. It is located in the projection plane of the foam insulation inlet To.

  According to the present invention, when the vacuum heat insulating material is disposed on the inner surface of the outer box, the risk of damaging the outer packaging material of the vacuum heat insulating material is reduced, and the heat insulating partition wall can be sufficiently filled with the foam heat insulating material. The refrigerator which can be provided can be provided.

The perspective view which looked at the refrigerator of embodiment which concerns on this invention from diagonally forward. AA sectional view taken on the line AA of FIG. The perspective view which shows the foaming method of the foam heat insulating material of the refrigerator of embodiment. BB sectional drawing of the refrigerator of FIG. (A) is the front view which looked at the heat radiating pipe attached to the side plate of embodiment, and the vacuum heat insulating material from the outer side of the refrigerator, (b) is CC sectional view taken on the line of (a), (c) is (a). DD sectional view taken on the line. Sectional drawing which shows the manufacturing process of the core material of the vacuum heat insulating material of embodiment over time. Sectional drawing which shows the process of accommodating the core material of embodiment in an outer packaging material, and manufacturing a vacuum heat insulating material with time. The P section enlarged view of FIG. 4 which shows the groove pitch provided in the vacuum heat insulating material of embodiment. The figure which shows the temperature characteristic of the vacuum heat insulating material for selecting the groove pitch of FIG. The principal part enlarged view of the P section of FIG. 4 which shows an example which applied the result of FIG. 8, FIG. The rear perspective view which looked at the refrigerator of the deformation | transformation form from diagonally back upper side. (a) is a rear perspective view of a vacuum heat insulating material used in the refrigerator of the modified form shown in FIG. 11, (b) is a cross-sectional view taken along the line GG of (a), and (c) is an H- H line sectional drawing. The EE sectional view taken on the line of FIG. FF sectional view taken on the line of FIG. (a) is an enlarged view showing the Q portion of FIG. 13 in an enlarged manner, and (b) is a Q portion of FIG. 13 when a vacuum heat insulating material provided with a bent portion without forming end recesses on both sides is used. The enlarged view which expands and shows. It is a partial expanded sectional view which expands and shows the cross section of the heat insulation partition wall in the refrigerator of an embodiment partially, Comprising: The communicating port for taking in the foam insulation which expands by foaming in a heat insulation partition wall, and a vacuum heat insulating material FIG. It is a partial expanded sectional view which expands and shows the longitudinal cross-section of the heat insulation partition wall in the conventional refrigerator partially. It is the partial expanded sectional view which expands and shows the transverse cross section of the heat insulation partition wall in the conventional refrigerator partially, Comprising: The communicating port for taking in the foam insulation which expands and expands in a heat insulation partition wall, and a vacuum heat insulating material, It is a figure which shows these positional relationships.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
The refrigerator of the present invention is an outer box that locks an inner box arranged inside an outer box when the vacuum heat insulating material is arranged to cover a heat radiating pipe extending on the inner surface of a side plate as an outer box. The edge of the end recess of the vacuum heat insulating material covering the heat radiating pipe portion that is disposed closest to the flange portion of the heat insulating pipe is the foam heat insulating material inlet formed in the heat insulating partition wall. Its main feature is that it is located within the projection plane.
Below, after demonstrating the whole structure of the refrigerator of this invention first, it demonstrates in detail, mainly referring FIG.

FIG. 1 is a perspective view of a refrigerator 1 according to an embodiment of the present invention as viewed obliquely from the front, and FIG. 2 is a cross-sectional view taken along line AA in FIG.
The refrigerator 1 includes a refrigerator main body 1H that stores stored items such as refrigerated and frozen foods, and a plurality of doors (5, 6 (6a, 6b, 6c) that open and close the front opening 1H1 (see FIG. 2) of the refrigerator main body 1H. ), 7).

The refrigerator main body 1H has a refrigerator compartment 2, a freezer compartment 3 including an ice making compartment 3a, a first freezer compartment 3b, and a second freezer compartment 3c, and a vegetable compartment 4 from above. Each front opening 1H1 in which these chambers are opened is provided with a door.
Incidentally, as shown in FIG. 2, at least the space between the refrigerator compartment 2 and the freezer compartment 3 and between the freezer compartment 3 and the vegetable compartment 4 are thermally insulated by heat insulating partition walls 60 and 60 described in detail later. ing.
The refrigerator compartment door 5 is a door that opens and closes the refrigerator compartment 2, and is composed of two doors of a double door type. The freezer compartment door 6 is a door that opens and closes the freezer compartment 3, and includes three drawer-type doors, that is, an ice making compartment door 6a, a first freezer compartment door 6b, and a second freezer compartment door 6c. The lowermost vegetable compartment door 7 is a door that opens and closes the vegetable compartment 4, and is a drawer-type door.
The drawer-type door is a door that is pulled out together with a storage case in which stored items are stored.

A cooler 8 is installed in the cooler chamber 9 shown in FIG. 2, and the cooler 8, the compressor 10, the following condenser, a capillary tube, and the like constitute a refrigeration cycle.
Here, in the refrigerator 1, as a condenser, a heat radiating pipe through which the refrigerant flows is attached to the inner side of the side plate 11 and the rear plate 12 (the side of the foam heat insulating material 17) constituting the outer shell of the refrigerator main body 1H. The heat is dissipated instead of the condenser. Isobutane (R600a) is used as the refrigerant. Although other refrigerants may be used as the refrigerant, isobutane is preferably used as the refrigerant because it has advantages such as not destroying the ozone layer when discarded and having a low global warming potential.

The cold air cooled by the cooler 8 of the refrigeration cycle is forcedly circulated to the refrigerator compartment 2, the freezer compartments 3 (3a, 3b, 3c), the vegetable compartment 4 and the like by the internal cold air circulation fan 13. The refrigerator compartment 2 and the vegetable compartment 4 are opened and closed with a damper thermostat against the cold air, and the freezer compartment 3 is cooled to a set temperature by a temperature controller (thermostat) or the like.
The internal temperature of the refrigerator 1 is controlled by the control board 14 provided on the upper rear side of the refrigerator body 1H.

Next, a method for foaming the foam heat insulating material (urethane foam) 17 into the refrigerator 1 will be described. However, the filling of the foam heat insulating material 17 into the heat insulating partition wall 60 (see FIG. 16) described later will be described in more detail after the description here.
As shown in FIG. 2, the refrigerator box 15 constituting the refrigerator body 1H includes an outer box 19 that forms an outer shell having a side plate 11, a back plate 12, and the like, and an inner box 18 in which stored items such as food are stored. Prepare.

FIG. 3 is a perspective view showing a foaming method of the foam heat insulating material of the refrigerator.
As shown in FIG. 3, when the urethane foam stock solution is injected into the refrigerator box 15, that is, the space between the outer box 19 and the inner box 18 (heat insulating space), the back plate 12 of the refrigerator box 15 is placed upward. The refrigerator box 15 is set in a foaming apparatus (not shown) so as to be positioned, and the urethane foam stock solution is injected from the inlet 16 (16a, 16b).
Incidentally, the urethane foam undiluted solution is foamed and cured to become the foam heat insulating material 17, and the polyether polyol has a foaming agent such as cyclopentane and water, and further an auxiliary agent such as a catalyst and a foam stabilizer. A liquid obtained by mixing a premixed liquid and an isocyanate liquid.

The injected urethane foam undiluted solution wraps around the entire opening edge side between the outer box 19 and the inner box 18 of the refrigerator box 15, and then starts to foam, and is a refrigerator composed of the inner box 18 and the outer box 19. The space of the box 15 is filled and filled.
Under the present circumstances, the vacuum heat insulating materials 21 and 31 of the postscript are temporarily fixed to the outer box 19 side beforehand by hot melt, a sealing material, etc., and the filling of the foam heat insulating material 17 by foaming of the outer box 19 of the refrigerator box 15 is carried out. It is fixed inside (foam insulation 17 side).

The refrigerator box 15 will be described below.
As described above, the refrigerator box 15 is composed of an inner box 18 constituting each room for storing stored items such as the refrigerator compartment 2 and the freezer compartment 3, an outer side plate 11 and a rear plate 12 constituting the outer shell. It is configured by foaming and filling the foam heat insulating material 17 in the space between the box 19.

FIG. 4 is a cross-sectional view of the refrigerator 1 in FIG.
The side plate 11, the back plate 12, etc. constituting the outer box 19 are made of a thin steel plate having a thickness of about 0.4 to 0.5 mm.
On the side plate 11 and the back plate 12, a heat radiating pipe 20 that functions as a condenser of the refrigeration cycle is fixed (at a pitch) with an aluminum tape or the like with a spacing of W1. The diameter of the heat radiating pipe 20 is about 4.0 to 5.0 mm.

On the front opening 1H1 side of the refrigerator box 15, an R bent portion (inner box locking portion) 19 a of a locking portion for locking the inner box 18 to the outer box 19 is formed in the outer box 19.
The R bent portion 19a of the locking portion of the outer box 19 elastically deforms the locked portion 18a of the inner box 18 and is sandwiched between the flange portion 19b, so that the outer box 19 and the inner box 18 are attached. It has been.
The heat radiating pipe 20 near the R-bending portion 19a of the outer box 19 heats the R-bending portion 19a, and the vicinity of the flange portion 19b following the R-bending portion 19a is engaged by the locked portion 18a of the inner box 18 that is sandwiched during the cooling operation. Through this, it is cooled down to a temperature below the dew point temperature to prevent condensation.

As shown in FIG. 4, the vacuum heat insulating materials 21, 31 are, for example, four continuous heat radiating pipes 20 (diameter 4..., Previously attached to the side plate 11, the back plate 12, etc. with an aluminum tape or the like. 0 mm) has recesses (22, 22a, 22b) and recesses (32, 32a, 32b, 32c).
The vacuum heat insulating materials 21 and 31 are respectively provided with the heat dissipating pipe 20 attached to the side plate 11 and the back plate 12 with a spacing (pitch) of W1 as a recess (22, 22a, 22b) and a recess (32, 32a, 32b, 32c) is affixed to the side plate 11 and the back plate 12 using hot melt, adhesive tape, or the like.

The foam heat insulating material 17 is filled in a space formed between the outer box 19 and the inner box 18 after the heat radiation pipe 20 and the vacuum heat insulating materials 21 and 31 are attached to the side plate 11 or the back plate 12. .
Therefore, attachment of the vacuum heat insulating materials 21 and 31 to the side plate 11 or the back plate 12 is performed by the foam heat insulating material 17 between the side plate 11 and the vacuum heat insulating material 21, and the back plate 12 and the vacuum heat insulating material 31. It is necessary to fix so as not to invade between.

FIG. 5 is a view showing a state in which the heat radiating pipe 20 and the vacuum heat insulating material 21 are attached to the side plate 11 of the refrigerator 1 shown in FIGS. 1 and 4, and (a) is the heat radiating pipe 20 attached to the side plate 11, It is the front view which looked at the vacuum heat insulating material 21 from the outer side of the refrigerator 1, (b) is CC sectional view taken on the line of (a), (c) is DD sectional view taken on the line of (a). .
The vacuum heat insulating material 21 has a recess 22 and end recesses 22a and 22b for accommodating a heat radiating pipe 20 made of, for example, a copper pipe having a diameter of 4.0 mm.

The recesses 22 and the end recesses 22a are formed in a plurality of rows in the vertical direction of the vacuum heat insulating material 21 and with a center line spacing of W1. In other words, the central recess 22 and the end recess 22a on the end side of the vacuum heat insulating material 21 are attached to the inner surface 11n of the side plate 11 with a W1 dimension and an interval of 180 to 220 mm. The pipe 20 is covered.
The recess 22 has an indented shape (concave shape) with rising wall portions on both the left and right sides covering the heat radiating pipe 20, its depth dimension D1 is about 5 mm, and its width dimension L3 is 40 to 40. 60 mm.

That is, the width dimension L3 of the recess 22 is a manufacturing error in making the recess 22, an installation error in attaching the vacuum heat insulating material 21 to the side plate 11, and the heat radiating pipe 20 slightly on the plane of the side plate 11. Even if it is bent or there is an error in attaching the heat radiating pipe 20 to the side plate 11, the heat radiating pipe 20 can be accommodated.
In addition, the depth dimension D1 of the recess 22 is such that when the vacuum heat insulating material 21 is attached to the side surface plate 11, the heat radiating pipe 20 is pressed against the side surface plate 11, causing a pressing impression on the side surface plate 11, or the vacuum heat insulating material 21. The outer packaging material 24 is designed to have a diameter equal to or greater than the diameter of the heat radiating pipe 20, for example, 5.0 mm so as not to be damaged.

On the other hand, among the grooves formed in a plurality of rows in parallel with the vacuum heat insulating material 21 shown in FIG. 5A, the end recesses 22a of the grooves provided along the left and right ends of the vacuum heat insulating material 21 are the recesses 22. In this way, the heat radiation pipe 20 is surrounded by an L-shaped cross section that is provided along the edge of the vacuum heat insulating material 21 instead of the groove shape having the rising wall portions on both the left and right sides so as to surround the heat radiating pipe 20. It has a concave shape.
The depth dimension D1 of the end recess 22a is 5.0 mm, similar to the recess 22, and the width dimension L4 in the short direction of the end recess 22a is 40, similar to the L3 dimension of the recess 22. It is about ~ 60mm.

  This is because when a plurality of rows of grooves are formed in the vacuum heat insulating material 21, the groove at the end is an end concave portion having an L-shaped cross section that opens outward along the edge of the vacuum heat insulating material 21. This is because the location 22a is easier to form than a simple concave shape. Further, by using the end recess 22a that is open to the outside, the work of bending the heat radiating pipe 20, the work of installing the heat radiating pipe 20 in the end recess 22a, or the machine room 29 (see FIG. 2) side. Easy to pull out.

  Furthermore, the shape of the groove located along the left and right ends (both left and right edges) of the vacuum heat insulating material 21 is configured to be outwardly open like the end recess 22a, so that the convexity of the conventional vacuum heat insulating material is increased. Since the portion 59 (see FIG. 16) is eliminated, when the vacuum heat insulating material 21 is attached to the side plate 11, the heat radiating pipe 20 on the side plate 11 is connected to the front opening 1H1 side of the refrigerator box 15. It can be arranged close to the R-bending portion 19a.

Further, the upper and lower ends of the vacuum heat insulating material 21 have end recesses 22b in consideration of the ease of manufacturing and the ease of storing the heat radiating pipe 20 as described above. Similarly to the end recess 22a, the end recess 22b does not have a groove shape having rising wall portions on both the left and right sides so as to surround the heat radiating pipe 20 like the recess 22, but at the edge of the vacuum heat insulating material 21. A concave shape that forms an L-shaped cross-section with the outer side open. The end recess 22b has a dimension L5 in the longitudinal direction of the vacuum heat insulating material 21 of about 40 to 80 mm.
In other words, in the end recess 22b where the outside is opened, the heat radiating pipe 20 can be freely moved outward and arranged in a free path. For example, it can be arranged in a U-shape as shown in FIG.

<Manufacture of vacuum heat insulating material 21>
Next, the manufacturing method of the vacuum heat insulating material 21 is demonstrated using FIG. 6, FIG. 6 is a cross-sectional view showing the manufacturing process of the core material 23 of the vacuum heat insulating material 21 over time, and FIG. 7 shows the process of manufacturing the vacuum heat insulating material 21 by housing the core material 23 in the outer packaging material 24 over time. FIG. 6 and 7, the horizontal lines inside the laminated body 25 (25a, 25b, 25c) in the core member 23 indicate the direction of the fibers, and the pitch indicates the change in thickness is ignored. .
As shown in FIG. 7C, the vacuum heat insulating material 21 includes an inner core member 23 and an outer outer packaging material 24 made of a metal foil laminate film having a plastic layer for heat welding. The

The inner core member 23 includes an inorganic fiber laminate 25 (25a, 25b, 25c) (see FIG. 6A) and an inner bag 26 that covers the laminate 25.
The laminated body 25 is generally made of natural fibers such as glass wool, glass fiber, alumina fiber, silica-alumina fiber, or cotton. And the inner bag 26 which covers the laminated body 25 is comprised from the flexible polyethylene film etc. with a thickness of 20 micrometers.

  The reason why a flexible film having a thickness of 20 μm is used for the inner bag 26 is that when the inside of the inner bag 26 is compressed, a space is created between the film and the end of the laminate 25 due to the flexibility of the film. This is so that there is no such thing. Further, since the inner bag 26 has flexibility, the size of the foreign matter mixed into the laminated body 25 is absorbed in the welded portion of the opening of the outer packaging material 24 and the inner bag 26 is not torn, so that the foreign matter can be encased. This is so as not to protrude from the material 24.

  When manufacturing the core material 23, the inorganic fiber prepared beforehand is compressed with a press machine, and then cut into a laminate 25 (25a, 25b, 25c) having a predetermined size. And the laminated body 25 (25a, 25b, 25c) cut | disconnected by this compression is accommodated in the inner bag 26 (refer FIG.6 (b)). And the core 25 is made by compressing the laminated body 25 accommodated in the inner bag 26 by the press machine 27, and sealing the opening part of the inner bag 26 by heat welding using the heat welding machine 27y (FIG. 6 (c)).

Hereafter, the manufacturing process of the vacuum heat insulating material 21 is demonstrated in detail using FIG. 6, FIG.
First, as shown in FIG. 6A, after drying the inorganic fibers of the raw cotton, it is cut into laminates 25a, 25b, 25c having a predetermined size and laminated in three stages.
Here, the laminated body 25a is formed to include a laminated body 25a1, a laminated body 25a2, and a laminated body 25a3.

  And in order to make the recess 22 (refer FIG.5 (b)) of the vacuum heat insulating material 21, gap | interval 22 'is each provided between the laminated body 25a1 and the laminated body 25a2, and between the laminated body 25a2 and the laminated body 25a3. In addition, in order to make the end recess 22a (see FIG. 5B) of the vacuum heat insulating material 21, the laminated body 25a1 takes a gap 22a 'from the edge of the laminated body 25b, and the laminated body 25a3 The laminates 25a1, 25a2, and 25a3 are respectively disposed on the laminate 25b with a gap 22a 'from the edge of the laminate 25b.

That is, the laminated body 25a (25a1, 25a2, 25a3) is cut with a predetermined width dimension, and each of them is placed on the laminated body 25b with a gap 22 'and a gap 22a' having predetermined dimensions, and then Through the steps (FIGS. 6B to 7C), the recess 22 and the end recess 22a are formed. The end recess 22b of the vacuum heat insulating material 21 is formed in the same manner.
Each of the stacked bodies 25a, 25b, and 25c has a thickness of, for example, approximately 100 mm. The stacked bodies 25a, 25b, and 25c have a thickness of approximately 300 mm in total. That is, the inorganic fiber laminate 25 (25a, 25b, 25c) has a total thickness of about 300 mm before being compressed to form the core member 23.

  Subsequently, as shown in FIG. 6 (b), the laminated bodies 25a, 25b, 25c cut to a predetermined size are removed from the opening of the inner bag 26 (on the right side of FIG. 6 (b)). ) As shown by the white arrow. At this time, since the laminated bodies 25a, 25b, and 25c do not contain a binder (curing agent), they have flexibility, and are deformed along the shape of the inner bag 26, and the corners are rounded. . At this time, since the laminated bodies 25a, 25b, and 25c are not pressed, the entire laminated bodies 25a, 25b, and 25c have a thickness of about 300 mm.

  Next, as shown in FIG. 6 (c), the laminated body 25 (25a, 25b, 25c) housed in the inner bag 26 is compressed as indicated by the white arrow with the press machine 27 under a predetermined reduced pressure, The laminates 25a, 25b, and 25c having a total thickness of about 300 mm are compressed to a total thickness of about 10 to 15 mm. That is, the core material 23 is compressed from the original thickness in the thickness direction to, for example, about 1 / 25th by the press machine 27, and the thickness becomes about 10 to 15 mm. At this time, an adsorbent (not shown) that adsorbs gas, moisture and the like is placed in the inner bag 26. That is, by utilizing the fact that the laminated body 25a is compressed to have a thickness of about 5 mm, the portions corresponding to the recesses 22, the end recesses 22a, and the end recesses 22b described above are shown in FIG. The laminated bodies 25a1, 25a2, and 25a3 are divided as shown in c).

And the opening part 26c of the inner bag 26 is heat-welded with the welding machine 27y, and is sealed. Also in this process, the laminated body 25 has a shape with rounded corners along the shape of the inner bag 26 and constitutes the core member 23. Then, when the press machine 27 is opened, the thickness of the core member 23 is restored from 10 to 15 mm to about 30 mm.
With the core material 23 manufactured in this manner, the subsequent process, that is, the process of storing the core material 23 in the outer packaging material 24 and performing the decompression process is not performed. Storage becomes possible, and the laminated body 25 does not move in the inner bag 26 during storage. Moreover, since the opening part 26c of the inner bag 26 is heat-welded, dust does not enter the inner bag 26 from the outside.

Next, as shown in FIG. 7A, the core material 23 housed in the outer packaging material 24 covering the vacuum heat insulating material 21 is compressed and compressed using the press machine 127 and the pressure reducing device in FIG. 7B. Prior to the decompression step, part of the inner bag 26 is broken to form the inner bag breaking portion 26b. When the inner bag breaking portion 26b is formed, air enters the core member 23 from the inner bag breaking portion 26b, and the thickness of the core member 23 increases.
By forming the inner bag breaking portion 26b, the laminated body 25 including the inner bag 26 in the vacuum chamber shown in FIG. 7B is smoothly decompressed and compressed to a predetermined thickness.

Specifically, as shown in FIG. 7 (b), the core material 23 in which the inner bag breaking portion 26b is formed and the outer packaging material 24 covering the core material 23 are placed between the press machines 127 in the vacuum chamber C. The pressure is reduced and vacuumed while being pressed to a thickness of about 50 mm by a press 127 so that the shape does not collapse.
When the inside of the outer packaging material 24 in the vacuum chamber C is in a vacuum state, the ear portion 24 a of the outer packaging material 24 is welded by the welding machine 127.
At this time, the ear portion 26a of the inner bag 26 overlaps the ear portion 24a of the outer packaging material 24, and the ear portion 24a of the outer packaging material 24 has a quadruple structure.

Here, the outer packaging material 24 has a laminate structure, and the inside thereof is a plastic layer of a heat-welded layer. For example, it is formed of a synthetic resin material such as a low density polyethylene film, a chain-like low density polyethylene film, or a high density polyethylene film. Therefore, the compatibility with the polyethylene film of the inner bag 26 is good, and the four-part heat welding of the ear part 24a of the outer packaging material 24 is possible, and the heat-welded part is integrated.
Therefore, even if dust adheres to the opening 24c (see FIG. 7A) of the outer packaging material 24 when the laminated body 25 of the core material 23 is stored, the opening 24c is an inner material as described above. Due to the presence of the bag 26, foreign matter such as dust can be prevented from projecting to the surface of the outer packaging material 24, and the ear portion 24 a of the outer packaging material 24 can be reliably welded and sealed.

In this way, when the vacuum heat insulating material 21 to which the ears 24a of FIG. 7B are welded is placed under atmospheric pressure, atmospheric pressure is applied to the vacuum heat insulating material 21 having a thickness of about 50 mm, and the air is crushed instantaneously, and FIG. ) Gaps 22 'and 22a' on the opposite side to the vacuum heat insulating material 21 having a thickness of about 15 mm in which a recess 22 and an end recess 22a shown in FIG.
Here, when the vacuum heat insulating material 21 to which the ear portion 24a of FIG. 7B is welded is at atmospheric pressure, the frictional force between the laminated bodies 25a1, 25a2, 25a3 and the inner bag 26 between the gaps 22 ′, 22a ′. Also, the frictional force between the inner bag 26 and the outer packaging material 24 at the location facing the laminates 25a1, 25a2, 25a3 is excessive because it partially works at the location facing the laminates 25a1, 25a2, 25a3. .

On the other hand, the frictional force between the laminated body 25c opposite to the gaps 22 ′ and 22a ′ and the inner bag 26 and the frictional force between the inner bag 26 and the outer packaging material 24 at the locations facing the laminated body 25c Since there is no ', 22a', it works equally weakly compared with the side where the gaps 22 ', 22a' are present.
Therefore, the inner bag 26, the outer packaging material 24, and the laminated bodies 25b and 25c facing the laminated body 25c on the opposite side of the gaps 22 ′ and 22a ′ are entirely pulled into the gaps 22 ′ and 22a ′. A recess 22 and an end recess 22a are formed on the opposite side of 'and 22a'.
The end recess 22b is formed in the same manner as the end recess 22a.
In this way, the outer packaging material 24 on the opposite side of the gaps 22 ′ and 22a ′ (see FIG. 7B) is partially pulled from the opposite side gaps 22 ′ and 22a ′ in a uniform wide area. Therefore, the deterioration of the gas barrier property of the outer packaging material 24 is suppressed.

In order to further suppress the deterioration of the gas barrier property of the outer packaging material 24, the following measures can be taken.
Before the decompression step of FIG. 7B or before the frictional resistance between the members of the laminate 25 and the inner bag 26 and the inner bag 26 and the outer packaging material 24 from the start of the decompression to the middle of the decompression is increased, From the outside of the outer packaging material 24, the surface of the flat core material 23 is finally recessed to form a recess (22, 22a, 22b (see FIGS. 5A and 5C)) and the recess. The position where (22, 22a, 22b) is formed is extruded by a partially projecting die of the press 127 with a dimension smaller than the depth of the final recess (22, 22a, 22b).

  Thereby, before the pressure reduction process proceeds to some extent and the friction resistance between the laminated body 25 and the inner bag 26 and between the inner bag 26 and the outer packaging material 24 becomes large, the outer packaging material 24 is previously recessed. 22a, 22b)), the sliding position of the gas barrier layer of the outer packaging material 24 can be prevented or suppressed. As described above, before the pressure reducing step or after the start of pressure reduction until the middle of pressure reduction, before the frictional resistance between the members of the laminated body 25, the inner bag 26, and the outer packaging material 24 is increased, from the outside of the outer packaging material 24. Then, the outer packaging material 2 is slid so as not to be stretched by extruding a dimension smaller than the depth of the final recess (22, 22a, 22b). This makes it possible to form the recesses (22, 22a, 22b) in the decompression step without substantially performing a press molding process using a mold as in the prior art.

  As described above, according to the present invention, the shape of the vacuum heat insulating material 21 can be changed to a shape suitable for the purpose in order to ensure the distance from the component without substantially requiring a press molding process using a mold. The vacuum heat insulating material 21 can be provided with reduced heat insulation performance and improved productivity without lowering the heat resistance.

  Although the vacuum heat insulating material 21 after the welding and sealing steps shown in FIG. 7 (c) is not shown in the figure, the ear portion 26a of the inner bag 26 and the ear portion 24a of the outer packaging material 24 are finally vacuumed based on their roots. The heat insulating material 21 is bent to the center of the surface opposite to the side where the recesses (22, 22a, 22b) are formed, and shaped and fixed with an adhesive tape, an adhesive, or the like (not shown). The vacuum heat insulating material 21 (31) is attached to the inside of the side plate 11 (see FIG. 4) or the back plate 12.

With this configuration, the depths of the recesses 22, the end recesses 22a, and the end recesses 22b formed after the vacuum heat insulating material 21 is molded (see FIG. 7C) are the laminates before the compression process. It can be freely changed according to the thickness of 25a (25a1, 25a2, 25a3).
The width of the recess 22, the end recess 22a, and the end recess 22b in the short direction is a place where a plurality of cut laminates 25a (25a1, 25a2, 25a3) are installed on the laminate 25b. It can be easily adjusted by changing.
As described above, the vacuum heat insulating material 21 of the present embodiment is different from the conventional in that the recess 22, the end recess 22a, and the end recess 22b in which the heat radiating pipe 20 is accommodated. Alternatively, the outer packaging material 24 or the like is not forcibly stretched using a jig or the like.

As described above, since the laminated body 25a (25a1, 25a2, 25a3) shown in FIG. 6A is divided with a predetermined interval (gap 22 ', 22a'), the core material 23 is provided in the outer packaging material 24. When the pressure is reduced after storage, as shown in FIG. 7C, a recess 22 and an end recess 22a (22b) are formed corresponding to the gaps 22 'and 22a', respectively. Note that a slight dent may occur on the opposite side of the recess 22 and the end recess 22a (22b) in the vacuum heat insulating material 21 (the side of the gaps 22 ′ and 22a ′ in FIG. 7B). There is almost no effect on the heat insulation performance.
In addition, although the case where each thickness dimension of laminated body 25a, 25b, 25c was about 100 mm was illustrated, it is an example and it cannot be overemphasized that each thickness dimension of laminated body 25a, 25b, 25c can be selected arbitrarily.

<Dimension W1 between heat radiation pipes 20>
Next, using FIGS. 8, 9, and 10, the dimension between the heat radiating pipes 20 (see FIGS. 4 and 5A) arranged in parallel to the side plate 11 is W1 (for example, 200 mm). Explain why.
FIG. 8 is an enlarged view of part P in FIG. 4 showing the groove pitch provided in the vacuum heat insulating material 21. FIG. 9 is a diagram showing temperature characteristics of the vacuum heat insulating material for selecting the groove pitch in FIG. FIG. 10 is an enlarged view of the main part of the P part in FIG. 4 showing an example to which the results of FIGS. 8 and 9 are applied.

As shown in FIG. 8, the heat radiating pipe 20 is substantially fixed to the inner surface 11 n of the side plate 11 with an aluminum tape 28 having a thickness of about 40 to 50 μm. As described above, the side plate 11 is a steel plate having a thickness of about 0.4 mm to 0.5 mm.
And although not shown in figure, the vacuum heat insulating material 21 is being fixed to the inner surface 11n of the side plate 11 with the hot melt, the adhesive agent, etc.

The R-bending portion 19a of the outer box 19 is elastically deformed so that the locked portion 18a of the inner box 18 is sandwiched between a flange portion 19b that is an outer plate facing the door in the outer box 19 and the inner box 18 is covered. The locking portion 18a is airtightly locked with the flange portion 19b.
Here, the R-bending portion 19a of the outer box 19 is formed by bending a steel plate forming the side plate 11 from the side plate 11 to form a flange portion 19b and folding back the flange portion 19b. The R bent portion 19a may be formed separately from the flange portion 19b and the side plate 11, and may be formed by welding to the flange portion 19b.

Since the vacuum heat insulating material 21 is disposed in the vicinity of the R-bent portion 19a of the outer box 19, the vacuum heat insulating material is different from the conventional concave portion having convex wall portions on the left and right sides in order to clear the dimensional constraints. An end portion 21 is formed as an indented end recess 22a that is opened outward so as to form an L-shaped cross section.
Similarly to the end recess 22a, the end recess 22b shown in FIG. 5A is also provided along the edge of the vacuum heat insulating material 21 and has a concave shape with the outside open.
The reason why the end recess 22a is formed in the vacuum heat insulating material 21 and the heat radiating pipe 20 is brought close to the flange portion 19b on the outer box 19 side will be described below.

  In order to seal the interior space of the refrigerator 1 from the interior 1n inside the inner box 18 through the packing 33 (see FIG. 10) for sealing with the outer box 19 provided on the doors 5, 6, and 7. There are heat leakage due to heat conduction and heat leakage due to heat conduction through the flange portion 19b with which the packing 33 from the inside 1n contacts. For this reason, a dew phenomenon may occur near the flange portion 19b at a location where the temperature drops below the dew point due to a temperature difference between the inside 1n and the outside 1g (see FIG. 8). In order to prevent this, the heat of the heat radiating pipe 20 is heated to be higher than the dew point temperature to prevent dew condensation.

  For this purpose, the end recess 22a of the vacuum heat insulating material 21 is provided, and the end recess 22a is provided in a concave shape with the outer side opened to the edge of the vacuum heat insulating material 21, thereby Therefore, the heat radiating pipe 20 covered with the end recess 22a can be disposed close to the flange portion 19b. Thereby, an effective dew countermeasure can be achieved.

Next, the temperature relationship between the heat radiating pipe 20 attached to the side plate 11 with the aluminum tape 28 shown in FIG. 8 and the side plate 11 will be described.
Generally, the side plate 11 has a depth dimension of 500 to 600 mm and a height dimension of 1700 to 1850 mm when the refrigerator has an internal volume of 450 liters or more.

  As shown in FIG. 8, the vacuum heat insulating material 21 attached to the side plate 11 is provided with two concave recesses 22 with a dimension W1 interval (for example, 200 mm pitch), and two end recesses 22a. (See FIG. 4). In the heat radiating pipe 20 in the end recess 22a, the dimension W2 to the point A of the end surface (flange portion 19b) of the side plate 11 is set to about 50 mm (40 to 70 mm). This is because heat of the heat radiating pipe 20 is transmitted to the flange portion 19b, the temperature is raised higher than the dew point temperature, and countermeasures for dew condensation occurring in the flange portion 19b are taken.

  FIG. 9 is a graph obtained by measuring the surface temperature of the side plate 11, the vertical axis indicates the temperature (° C.) of the measurement point, and the horizontal axis is the refrigerator from the point A of the side plate 11 (see FIG. 8). 1 shows the distance in the depth direction 1 (the back side direction of the refrigerator 1 in FIG. 1). In addition, the outside (1g) temperature at the time of a measurement is 30 degreeC, and the refrigerator 1 is a normal driving | running state.

The measurement points are S1 and S2 shown in FIG. In addition, since the temperature characteristic similar to S1 and S2 part was shown, the temperature characteristic regarding S1 part is demonstrated using FIG. 9 here.
In addition, the W1 and W2 dimensions in the depth direction of the refrigerator 1 that indicate the positions where the heat radiating pipes 20 are disposed on the side plate 11 are 50 mm in the W2 dimension and 200 mm in the W1 dimension.
Furthermore, the aluminum tape 28 having a thickness of 50 μm and a width of 40 mm was used for attaching the heat radiating pipe 20 to the side plate 11 (steel plate having a thickness of 0.45 mm).

As shown in FIG. 9, the measurement result under this measurement condition was found that the temperature at the point A was about 33 ° C. due to the temperature effect of the heat radiating pipe 20 and exceeded the dew point temperature when the humidity was 90%.
That is, by setting the distance W2 between the point A and the heat radiating pipe 20 closest to the point A to 50 mm, the temperature at the point A can be about 33 ° C., which is higher than the condensation temperature. Can be prevented.

Further, the intermediate temperature of the dimension W1 between the heat radiating pipe 20 and the heat radiating pipe 20 arranged adjacent to the heat radiating pipe 20 closest to the point A is substantially the same temperature (about 30 ° C.) as the outside temperature (30 ° C.). ° C).
That is, when the heat radiating pipes 20 are arranged at intervals of about 200 mm, the adjacent heat radiating pipes 20 can efficiently radiate heat without being affected by the mutual heat.

As described above, since the concave end portion 22a having an open outer shape is used, the conventional convex portion 59 shown in FIGS. 16 and 18 is not required, so that the heat radiating pipe 20 is formed in the flange portion 19b. While being able to arrange | position close, the thermal radiation pipe 20 can be covered with the edge part recess 22a of the vacuum heat insulating material 21. FIG.
Here, when the position of the heat radiating pipe 20 near the flange portion 19b is the same as the conventional one, the convex portion 59 (see FIG. 18) of the vacuum heat insulating material hits the R-bending portion 19a. It was difficult to cover the nearby heat radiating pipe 20. Therefore, the size of the vacuum heat insulating material has to be reduced to expose the heat radiating pipe 20 near the flange portion 19b.

  However, the vacuum heat insulating material 21 having the same position as the conventional position near the flange portion 19b is formed in the vacuum heat insulating material 21 near the flange portion 19b by forming a concave end recess 22a that is open to the outside. It became possible to cover with. Thus, since the vacuum heat insulating material 21 can be enlarged as compared with the conventional case, the coverage of the vacuum heat insulating material 21 covering the surface of the outer box 19 with which the foam heat insulating material 17 contacts can be improved.

  In this embodiment, the W2 dimension is 50 mm and the W1 dimension is 200 mm. However, if the W2 dimension is 40 mm to 70 mm, the temperature at the point A can be secured at 30 ° C. or more, and measures to prevent condensation are taken. it can. That is, in FIG. 9, when W2 is 40 mm, the temperature of the flange portion 19b is about 33.5 ° C., which is higher than the outside temperature of 30 ° C., and when W2 is 70 mm, the temperature of the flange portion 19b is outside the chamber. The temperature is about 30 ° C. or higher with respect to 30 ° C. Thereby, it is possible to sufficiently take measures against condensation on the flange portion 19b.

  If the W2 dimension is less than 40 mm, too much heat is generated from the heat radiating pipe 20 and adversely affects the cooling effect in the cabinet. On the other hand, if the W2 dimension is larger than 70 mm, the heat from the heat radiating pipe 20 is insufficient and the temperature of the flange portion 19b increases. There is an increased possibility of dew condensation. Therefore, the W2 dimension is desirably 40 mm to 70 mm.

  If the W1 dimension is 180 mm to 220 mm, as shown in FIG. 9, the surface temperature of the intermediate point between the heat radiating pipes 20 is lower than the outside temperature of 30 ° C., and a distance that can sufficiently radiate heat is secured. it can. That is, if the W1 dimension is 180 to 220 mm, the surface temperature of the intermediate point between the heat radiating pipes 20 is equal to or less than the outside temperature 30 ° C., and efficient heat radiation can be performed.

When the W1 dimension is less than 180 mm, the heat radiating pipe 20 cannot be efficiently radiated due to the influence of the heat of the adjacent radiating pipe 20, while when the W1 dimension is larger than 220 mm, the length of the radiating pipe 20 is long. Therefore, efficient heat dissipation cannot be performed.
Therefore, by setting the W1 dimension to 180 to 220 mm, the adjacent heat radiating pipes 20 do not interfere with each other and can efficiently perform a heat radiating action, which is most desirable.

<Vacuum insulation material 31 in a modified form attached to the back plate 12>
Next, a modified vacuum heat insulating material 31 attached to the back plate 12 will be described.
Specifically, using FIG. 11 to FIG. 14, the cover rate of the modified vacuum heat insulating material 31 attached to the back plate 12 (the ratio of the vacuum heat insulating material 31 covering the surface of the outer box 19 with which the foam heat insulating material 17 contacts). ), A configuration of the vacuum heat insulating material 31 in a deformed form that avoids the stock solution inlet 16 of the foamed heat insulating material 17, and a drawn portion 20d of the heat radiating pipe 20 and a vacuum heat insulating material 31 in a deformed form. The relationship with the grooves (recess 32, end recess 32a, 32b, 32c) will be described.

FIG. 11 is a rear perspective view of the modified refrigerator 1 as viewed from the obliquely rear upper side, and FIG. 12A is a rear perspective view of the vacuum heat insulating material 31 used in the modified refrigerator 1 shown in FIG. 12 (b) is a cross-sectional view taken along line GG in FIG. 12 (a), and FIG. 12 (c) is a cross-sectional view taken along line HH in FIG. 12 (a).
13 is a cross-sectional view taken along line EE in FIG.

As shown in FIGS. 11 and 13, a meandering heat radiating pipe 20 is attached to the surface of the back plate 12 on the side of the foam heat insulating material 17 with an aluminum tape 28 (see FIG. 8). Heat is transmitted to the back plate 12, and the heat radiating pipe 20 plays a role of radiating heat using the back plate 12 in the same manner as the condenser.
In order to insulate the heat released from the heat radiating pipe 20 from the inside 1n, a vacuum heat insulating material 31 is attached to the back plate 12 so as to cover the heat radiating pipe 20 attached to the back plate 12.

Specifically, as shown in FIG. 11, a heat radiating pipe 20 is attached in a meandering manner with an aluminum tape 28 (see FIG. 8) or the like on a back plate 12 made of a thin steel plate. Each of the drawer portions 20 d of the heat radiating pipe 20 is returned to the machine room 29 side, for example, and is connected to the piping (not shown) of the refrigeration cycle in the machine room 29.
And the back plate 12 to which the heat radiating pipe 20 is attached is utilized to the maximum as a heat radiator. As shown in FIG. 11, since the heat radiating pipe 20 is attached to a large area of the back plate 12, the vacuum heat insulating material 31 shown in FIG. 12 is approximately the same size as the back plate 12 to which the heat radiating pipe 20 is attached. Is formed.

The vacuum heat insulating material 31 is manufactured in a shape that avoids the lower inlet 16a among the plurality of inlets 16 (16a, 16b) provided on the back plate 12.
As shown in FIG. 12 (a), the vacuum heat insulating material 31 has a substantially hexagonal shape having notched portions 31a at the left and right lower portions. The conventional vacuum heat insulating material is generally made in a rectangular shape, but the vacuum heat insulating material 31 of the present embodiment is provided with notches 31a that avoid the two lower inlets 16a (see FIG. 11). The vacuum heat insulating material 31 is extended to the lower part of the lower inlet 16a. Thereby, the coverage of the vacuum heat insulating material 31 with respect to the outer case 19 of the refrigerator 1 is improved.

  If further explained, when the urethane foam stock solution of the foam heat insulating material 17 is filled in the heat insulating space between the inner box 18 and the outer box 19, as shown in FIG. Set in a foaming device (not shown) and insert the nozzles into the upper and lower injection ports 16b, 16a to inject the urethane stock solution. There is.

  Therefore, as shown in FIG. 11, the shape of the vacuum heat insulating material 31 at the left and right corners on the machine chamber 29 side below the vacuum heat insulating material 31, that is, the vacuum heat insulating material 31 in the vicinity of the two lower inlets 16a is cut out. Since the cutout portion 31a is provided, the vacuum heat insulating material 31 has a substantially hexagonal shape with two sides increased from the conventional square vacuum heat insulating material 56 (see FIG. 17).

In addition, unlike FIG. 11, you may arrange | position the drawer | drawing-out part 20d of the thermal radiation pipe 20 so that it may overlap to the lowest end of the vacuum heat insulating material 31. FIG.
The vacuum heat insulating material 31 shown in FIG. 12 has a bent portion 31b that covers the rising portion 12b that constitutes the expanded portion 12a (see FIG. 13) of the expanded portion provided to increase the internal volume of the back plate 12. .

  Furthermore, the vacuum heat insulating material 31 has a recess 32 (see FIGS. 12 (a) and 12 (b)) that houses the straight portion 20c (see FIG. 11) of the heat radiating pipe 20 attached to the back plate 12 at the center thereof. It has an end recess 32a (see FIGS. 12 (a) and 12 (b)) for accommodating the side straight portions 20b (see FIG. 11) on both sides of the heat radiating pipe 20. In addition, on the upper and lower outer peripheral portions of the vacuum heat insulating material 31, end recesses 32b and 32c (FIG. 12 (a)) for accommodating the U-turn portions 20a (see FIG. 11) of the bent portions of the heat radiating pipe 20, respectively. , (C)) is formed in the same shape as the end recess 32a.

The end recesses 32a, 32b, and 32c of the groove of the vacuum heat insulating material 31 are provided with rising wall portions on both the left and right sides so as to surround the heat radiating pipe 20 like the recess 32, similarly to the end recess 22a. It is not the groove shape which it has, but it is provided along the edge of the vacuum heat insulating material 31, and it is set as the concave shape of the cross-sectional L-shape which the outer side was open | released.
The recess 32 and the end recesses 32a, 32b, and 32c that can accommodate the heat radiation pipe 20 in the vacuum heat insulating material 31 are made in the same manner as the recess 22 and the end recess 22a shown in FIGS. .

As shown in FIG. 13, the recess 32 in the center of the vacuum heat insulating material 31 can accommodate the straight portion 20 c of the heat radiating pipe 20 having a diameter of 4.0 mm, for example.
End recesses 32b and 32c at the upper and lower outer peripheral portions of the vacuum heat insulating material 31 are not concave recesses 32 but L-shaped grooves without the convex portions 59 shown in FIG. Similarly to the end recess 22a shown in FIG. 5 (b), for example, the U-turn portion 20a of the heat radiating pipe 20 having a diameter of 4.0 mm can be stored in the same manner as the end recess 22b in FIG. Here, the end recesses 32a on both sides have a ridge line 31r disposed on the inner side of the ridge line 12r of the back plate 12 so that the vacuum heat insulating material 31 is attached to the back plate 12 without being lifted up. It is formed by bending toward.

The end recesses 32a on both sides of the vacuum heat insulating material 31 are not concave recesses 32 but L-shaped grooves without the convex portions 59 shown in FIG. 18, and are shown in FIG. 5 (b). Similar to the end recess 22a shown, for example, the side straight portion 20b of the heat radiating pipe 20 having a diameter of 4.0 mm can be accommodated as shown in FIG.
As shown in FIG.12 (b), the width dimension L3 of the recess 32 is made 40-60 mm.
The vacuum heat insulating material 31 covers the heat radiating pipe 20 with the recess 32 and the end recesses 32a, 32b, and 32c, and is fixed to the back plate 12 using hot melt.
As shown in FIG. 11, the vacuum heat insulating material 31 has a size almost equal to the surface area of the back plate 12, and the end recess 32 a has a shape in which the outer side of the edge of the vacuum heat insulating material 31 is opened. Therefore, the drawer portion 20 d of the heat radiating pipe 20 can be guided to the machine room 29.

That is, the lead-out portion 20d of the heat radiating pipe 20 does not have the convex portion 59 shown in FIG. Can be placed in
In the case of the refrigerator 1 of the present embodiment, the drawing portion 20d of the heat radiating pipe 20 can be drawn out of the projection surface of the vacuum heat insulating material 31 from the cutout portion 31a.

  Once the drawing portion 20d of the heat radiating pipe 20 is pulled out of the projection surface of the vacuum heat insulating material 31, it can be easily bent as shown in FIG. can do.

14 is a cross-sectional view taken along line FF in FIG.
Similarly to FIG. 8, the heat radiating pipes 20 (20b, 20c) attached to the back plate 12 shown in FIG. 13 also secure the interval (pitch) of the distance (W1) where the heat radiation from each heat radiating pipe 20 is saturated. Has been placed.

The vacuum heat insulating material 31 covers the heat radiating pipe 20 formed with the curved portion attached to the back plate 12 or the like with the recess 32 and the end recesses 32a, 32b, and 32c, and as shown in FIG. Using the recess 32a (see FIG. 12A), the drawer portion 20d of the heat radiating pipe 20 can be pulled out from the heat insulating space between the outer box 19 and the inner box 18 filled with the foam heat insulating material 17 into the machine room 29. It is configured as follows.
As described above, as shown in FIG. 12, the vacuum heat insulating material 31 has the cutout portion 31a at a location including the end recess 32a around the lower inlet 16a. Therefore, the heat radiating pipe 20 can be drawn out of the projection surface of the vacuum heat insulating material 21 on the same plane at the notch 31a.

  In other words, the lead portion 20 d of the heat radiating pipe 20 is not covered with the vacuum heat insulating material 31. The lead part 20d that is not covered with the vacuum heat insulating material 31 is located on the same plane as the other part of the heat radiating pipe 20, and the recess 32 and the end recessed parts 32a, 32b of the vacuum heat insulating material 31 that accommodates this. , 32c are also located on substantially the same plane. In this manner, the drawn portion 20b of the heat radiating pipe 20 is smoothly drawn out of the projection surface of the vacuum heat insulating material 31 without being obstructed by the conventional convex portion 59 shown in FIG. can do.

Accordingly, the heat radiating pipe 20 including the U-turn portion 20a of the meandering heat radiating pipe 20 can be covered by the recess 32 and the end recesses 32a, 32b, and 32c of the vacuum heat insulating material 31.
In addition, the heat radiating pipe 20 can be drawn out from the end recess 32a of the L-shaped groove having a concave cross section in which the outside of the vacuum heat insulating material 31 is opened.
Further, since the heat radiating pipe 20 can be disposed so as to be widened with respect to the side plate 11 and the back plate 12, the heat radiating areas of the side plate 11 and the back plate 12 can be maximized. Thereby, the side plate 11 and the back plate 12 can be efficiently used as a radiator.

In other words, the area of the vacuum heat insulating material 31 can be increased by providing the end recesses 32a, 32b, and 32c of the L-shaped groove.
Thereby, since most of the heat radiating pipe 20 is covered with the vacuum heat insulating materials 21 and 31, and the heat of the heat radiating pipe 20 is insulated, the refrigerator 1 that does not affect the heat of the heat radiating pipe 20 on the inside 1n is obtained.

FIG. 15 (a) is an enlarged view showing the Q portion of FIG. 13 in an enlarged manner, and FIG. 15 (b) is a vacuum heat insulation provided with bent portions 31b ′ without forming the end recesses 32a on both sides. It is an enlarged view which expands and shows the Q section of FIG. 13 at the time of using material 31 '. In the vacuum heat insulating material 31 ′, the end recesses 32 b and 32 c shown in FIG. 12A are formed in the same manner as the vacuum heat insulating material 31.
15 (a) and 15 (b), the hot melt 30 is applied to the back plate 12 with a thickness of 0.5 to 2.0 mm, and the vacuum heat insulating materials 31 and 31 'are connected to the back plate 12 through the hot melt 30. Attached to the face plate 12. That is, the hot melt 30 is an adhesive for attaching the vacuum heat insulating materials 31 and 31 ′ to the back plate 12.

  Since the back plate 12 is provided with a bulge portion 12a protruding rearward at the rear portion, the back plate 12 has a rising portion 12b for forming the bulge portion 12a. Note that the inflated portion 12a has a flat planar portion 12c formed to protrude rearward.

The vacuum heat insulating materials 31 and 31 ′ are provided so as to overlap the flat portion 12 c and the rising portion 12 b of the back plate 12.
Specifically, a bent portion 31b (see FIG. 12A) and a bent portion 31b ′ covering the flat surface portion 12c and the rising portion 12b of the back plate 12 are provided at both side ends of the vacuum heat insulating materials 31 and 31 ′. It has been.

The back plate 12 has a dimension as designed because an iron plate having a thin plate thickness is molded. However, the shape of the vacuum heat insulating materials 31 and 31 'is difficult to make according to the designed dimensions. In particular, the angle R1 of the bending portions 31b and 31b ′ formed using a bending jig is difficult to form.
Therefore, in the refrigerator 1, as shown in FIG. 15A, the end recess 32a of the vacuum heat insulating material 31 is bent to form a bent portion 31b, and the ridge line 31r on the vacuum heat insulating material 31 side is formed. It is shifted inward with respect to the ridge line 12r on the back plate 12 side. As a result, the vacuum heat insulating material 31 is affixed to the back plate 12 without being lifted, and the bent portion 31b is brought into contact with the rising portion 12b so that the bent portion 31b and the flat portion 12c of the back plate 12 are raised. A closed space is formed with 12b.

Similarly, as shown in FIG. 15B, both end portions of the vacuum heat insulating material 31 ′ are bent to form bent portions 31b ′, and the ridge line 31r ′ on the vacuum heat insulating material 31 ′ side is changed to the ridge line on the back plate 12 side. 12r is provided so as to be shifted inward with respect to 12r. As a result, the vacuum heat insulating material 31 ′ is affixed to the back plate 12 without being lifted, and the bent portion 31 b ′ and the flat portion 12 c of the back plate 12 are brought into contact with the rising portion 12 b. A closed space is formed by the rising portion 12b.
Then, the tips of the bent portions 31b and 31b ′ are bonded to the rising portion 12b with the hot melt 30 so that the bent portions 31b and 31b ′ of the vacuum heat insulating materials 31 and 31 ′ are filled with the foam heat insulating material 17, The foam heat insulating material 17 is prevented from entering between the vacuum heat insulating materials 31 and 31 ′ and the back plate 12 to deform the vacuum heat insulating materials 31 and 31 ′.

  The heat radiating pipe 20 attached to the side end portion of the back plate 12 is a closed space formed by the rising portion 12b of the back plate 12 and the bent portions 31b and 31b 'of the vacuum heat insulating materials 31 and 31' (FIG. 15A). A closed space formed by the back plate 12 and the end recess 32a of the vacuum heat insulating material 31, or the back plate 12 shown in FIG. 15B and the left and right end portions of the vacuum heat insulating material 31 '. (Closed space). In other words, since the heat radiating pipe 20 is located on the ridge line 12r between the flat surface portion 12c and the rising portion 12b of the back plate 12, the disposing work of the heat radiating pipe 20 becomes easy.

  Further, the bending of the vacuum heat insulating materials 31 and 31 'is facilitated because it is not necessary to adjust the angle. Further, regarding the arrangement of the vacuum heat insulating materials 31 and 31 ′ on the back plate 12, the flat surface portion 31p (see FIG. 15A) and the flat surface portion 31p ′ (see FIG. 15B) of the vacuum heat insulating materials 31 and 31 ′. Since it is only necessary to match the flat portion 12c of the back plate 12 with reference to FIG.

  Further, since the rising portion 12b of the back plate 12 and the tip portions of the bent portions 31b and 31b ′ of the vacuum heat insulating materials 31 and 31 ′ are bonded and sealed with an adhesive, a closed space for housing the heat radiating pipe 20 (FIG. 15). A closed space formed by the back plate 12 and the end recess 32a of the vacuum heat insulating material 31 shown in (a), or bending of the left and right ends of the back plate 12 and the vacuum heat insulating material 31 'shown in FIG. It is possible to prevent the foam heat insulating material from entering the closed space formed with the portion 31b ′ and to deform and open the tip portions of the vacuum heat insulating materials 31 and 31 ′.

  In the present embodiment, the case where the tips of the bent portions 31b and 31b ′ of the vacuum heat insulating materials 31 and 31 ′ are bonded to the rising portion 12b of the back plate 12 with an adhesive is exemplified, but aluminum is used instead of bonding. It may be sealed and attached with a tape or the like, and if the tips of the bent portions 31 b and 31 b ′ of the vacuum heat insulating materials 31 and 31 ′ are sealed and attached to the rising portion 12 b of the back plate 12, the attachment mode is particularly limited. They can be selected as appropriate.

<Insulation partition wall 60>
As shown in FIG. 2, the heat insulating partition wall 60 partitions the internal space of the inner box 18 in the vertical direction, thereby partitioning the refrigerator compartment 2 and the freezer compartment 3 as described above, as well as the freezer compartment 3 and the vegetables. The chamber 4 is thermally insulated.
Incidentally, the heat insulating partition wall 60 disposed between the refrigerator compartment 2 and the freezer compartment 3 is formed to be thicker than the heat insulating partition wall 60 disposed between the freezer compartment 3 and the vegetable compartment 4. However, in the following, the heat insulating partition wall 60 disposed between the refrigerator compartment 2 and the freezer compartment 3 will be described as an example.

The heat insulating partition wall 60 in the present embodiment is obtained by filling the hollow heat insulating material 17 in the hollow portion of a substantially rectangular plate body in plan view.
FIG. 16 referred to next is a partially enlarged cross-sectional view showing a partially enlarged cross section of the heat insulating partition wall in the refrigerator of the embodiment, and takes in the foam heat insulating material that expands by foaming into the heat insulating partition wall. It is a figure which shows the positional relationship of the communicating port for and a vacuum heat insulating material.
In addition, this FIG. 16 is the elements on larger scale corresponding to FIG. 18 which showed the conventional refrigerator. Therefore, FIG. 16 shows a state in which the refrigerator 1 is arranged so that the opening side of the refrigerator 1 (the front side of the refrigerator 1) faces downward in the vertical direction in order to fill the heat insulating partition wall 60 with the foam heat insulating material 17. 16, the front side of the refrigerator 1 is partially shown on the lower side of the sheet of FIG. 16, and the upper side of the sheet of FIG. Further, the outside of the refrigerator 1 is partially shown on the left side of FIG. 16 via the side plate 11 of the refrigerator 1, and the inside of the refrigerator 1 is partially shown on the right side of the page via the side plate 11 of the refrigerator 1. Is shown.

  In FIG. 16, reference numeral 1 denotes a refrigerator, reference numeral 20 denotes a heat radiating pipe extending so as to meander along the inner surface of the side plate 11 constituting the outer box 19, and reference numeral 21 denotes a vacuum heat insulating material. The reference numeral 22a is the above-described end recess formed in the vacuum heat insulating material 21, and the reference numeral 19b is an inner box 18 and a front plate 62 that forms the front end face of the heat insulating partition wall 60. It is the flange part latched on.

  The heat radiating pipe 20 shown in FIG. 16 is arranged on the inner surface of the side plate 11 so as to meander and fold back a plurality of times, and is disposed closest to the flange portion 19b. Only the straight pipe portion extending in the direction perpendicular to the paper surface is shown.

  As described above, the portion of the heat radiating pipe 20 disposed closest to the flange portion 19b cools the flange portion 19b through the function as a condenser of the refrigeration cycle and the inner box 18 that is low in the refrigerator 1. It has a function of preventing condensation due to the dissipated heat. In the present embodiment, the “radiating pipe 20 portion disposed closest to the flange portion 19b” is disposed at a distance W2 (for example, about 40 to 70 mm) from the flange portion 19b, and prevents condensation near the flange portion 19b. Is done efficiently.

As shown in FIG. 16, the outer side surface of the heat insulating partition wall 60 communicates with the hollow portion and the heat insulating space 63 formed between the outer box 19 and the inner box 18 of the refrigerator 1. A communication port 61 is formed. The communication port 61 corresponds to a “foam heat insulating material intake port” in the claims.
The end edge on the flange 19 b side of the end recess 22 a in the vacuum heat insulating material 21 is located in the projection plane of the communication port 61.

  In addition, the front end of the communication port 61 in this embodiment is usually at a position retracted from the front end surface of the heat insulating partition wall 60 by a distance of about 30 to 40 mm (indicated by W5 in FIG. 16) (above the paper surface in FIG. 16). (Offset position). That is, the communication port 61 is disposed adjacent to the flange portion 19b so that the communication port 61 is positioned in the vicinity of the flange portion 19b. Moreover, it is desirable to set the width L8 in the front-rear direction of the communication port 61 to about 30 to 50 mm.

  In the present invention, “the end edge of the end recess 22a on the flange 19b side is located in the projection plane of the communication port 61” means that the end in the depth direction (front-rear direction) in FIG. It means that the end edge of the concave portion 22a on the flange portion 19b side may be slightly shifted from the width L8 of the communication port 61 within the equivalent range.

  According to the refrigerator 1 in the positional relationship between the edge of the end recess 22a on the flange portion 19b side and the communication port 61 as described above, the front end surface of the heat insulating partition wall 60 is vertical as shown in FIG. When the urethane foam stock solution is injected from the inlets 16 and 16a (see FIG. 3), the urethane foam stock solution is divided into the outer box 19 and the inner box 18 in the same manner as described above. A urethane foam stock solution reservoir 56a is formed in the vicinity of the flange portion 19b serving as a joint portion. The urethane foam stock solution foams and the uncured foam heat insulating material 17 rises in the heat insulating space 63.

  At this time, the uncured foam heat insulating material 17 is not hindered from rising of the uncured foam heat insulating material 17 by the convex portion 59 unlike the conventional vacuum heat insulating material 56 shown in FIG. The front end portion (the lower portion of the drawing in FIG. 16) of the vacuum heat insulating material 21 in the present embodiment without the convex portion 59 functions as a guide for the flow of the uncured foam heat insulating material 17, whereby the uncured foam heat insulating material. The material 17 is efficiently taken in and spreads inside the heat insulating partition wall 60 through the communication port 61.

As mentioned above, according to the structure of the refrigerator 1 of this embodiment, there exists the following effect.
According to the refrigerator 1, when the uncured foam heat insulating material 17 moves up the heat insulating space 63, unlike the conventional vacuum heat insulating material 56 (see FIG. 18), the urethane is placed above the urethane foam stock solution reservoir 56a. A space necessary for foaming the foam stock solution can be provided. Moreover, the flow direction of the foam heat insulating material 17 can be changed toward the communication port 61 by guiding the flow of the uncured foam heat insulating material 17 in which the front end portion of the vacuum heat insulating material 21 rises. As a result, according to the refrigerator 1, it is possible to fill the heat insulating partition wall 60 with the sufficient foam heat insulating material 17.

  Further, according to the refrigerator 1, since the communication port 61 is provided adjacent to the flange portion 19b, the uncured foam heat insulating material 17 formed by foaming in the urethane foam stock solution reservoir 56a is more efficiently communicated. It is taken into the heat insulating partition wall 60 from the mouth 61.

  Further, according to the refrigerator 1, the end recess 22 a and the recess 22 provided in the vacuum heat insulating material 21 reduce the thickness of the core member 23 disposed in the outer packaging material 24 according to the diameter of the heat radiating pipe 20. Therefore, as in a conventional vacuum heat insulating material manufacturing method (see, for example, Patent Document 1), a press-molding method is applied to the vacuum heat insulating material 56 (see FIG. 18) to form a recess 57 ( Unlike what formed FIG. 18), the deformation amount of the outer packaging material 24 is small. Therefore, damage to the outer packaging material 24 of the vacuum heat insulating material 21 is prevented.

  Further, according to the refrigerator 1, the outer casing 19 includes the recesses (22, 32, 32 ′) and the end recesses (22 a, 32 a, 32 b, 32 c) provided in the vacuum heat insulating materials 21, 31, 31 ′. The heat radiating pipe 20 provided in the Specifically, the heat radiating pipe 20 disposed in the vicinity of the flange portion 19 b is covered with the end recess 22 a, and the heat radiating pipe 20 disposed adjacent to the end recess 22 a is covered with the recess 22.

  The dimension W1 between the heat radiating pipes 20 is set to 180 mm to 220 mm, which is the shortest distance at which the heat radiating saturation distance is ensured, and the dimension W2 between the heat radiating pipe 20 disposed in the end recess 22a and the flange part 19b is set. 40 mm to 70 mm, in which dew can be prevented and the heat from the heat radiating pipe 20 is not adversely affected.

  Therefore, the adjacent heat radiating pipes 20 do not interfere with each other due to thermal interference with the inside 1n. Moreover, since there is no conventional convex part 59 (refer FIG. 16) in the edge part of the vacuum heat insulating materials 21, 31, and 31 ', the heat radiating pipe 20 is expanded widely on the back plate 12 and the side plate 11, respectively, The side plate 11 can be sufficiently utilized as a radiator for the heat radiating pipe 20. Moreover, since the distance between the heat radiating pipe 20 and the flange part 19b can be made appropriate, the effect of preventing dew condensation can be obtained.

In addition, the distance between the R-bending portion 19a (inner box locking portion) formed on the back side of the flange portion 19b and the end of the end recess 22a on the vacuum heat insulating material 21 side is separated by 10 mm or more. 21 and the width dimension L3 of the recess 22 and the width dimension L4 in the short direction of the end recess 22a were 40 to 60 mm, respectively.
Therefore, when the vacuum heat insulating material 21 is attached to the side plate 11, the vacuum heat insulating material 21 does not come into contact with the R-bending portion 19a and is damaged, and the heat radiating pipe 20 disposed in the end recess 22a. The dimension W2 (40 mm to 70 mm) between the flange portion 19b and the flange portion 19b can be easily secured.

  Further, the vacuum heat insulating material 31 attached to the back plate 12 is formed with L-shaped end recesses 32a, 32b, and 32c over the entire outer peripheral edge thereof. Therefore, compared to the conventional vacuum heat insulating material having a groove for accommodating the heat radiating pipe in a meandering manner, it is easy to form the recess 32 for accommodating the heat radiating pipe 20 and the end recesses 32a, 32b, 32c. Even if the shape of the 20 U-turn portions 20a or the drawer portion 20b is deformed, the vacuum heat insulating material 31 can be allowed to be stored in the end recesses 32a, 32b, and 32c. Moreover, the installation work of the heat radiating pipe 20 is easy, and workability can be improved.

In addition, the recess 22 and the end recess 22a provided in the vacuum heat insulating material 21 and the recesses 32 and 32 'and the end recesses 32a, 32b and 32c provided in the vacuum heat insulating materials 31 and 31' are respectively cores. It can be formed by changing the lamination thickness of the laminated body of inorganic fibers housed in the materials 23, 33 and the like.
Therefore, the recess 22 and the end recess 22a of the vacuum heat insulating material 21 for housing the heat radiating pipe 20, and the recesses 32 and 32 'and the end recesses 32a, 32b and 32c of the vacuum heat insulating materials 31 and 31'. The conventional equipment or jig or the like is no longer necessary to make the outer peripheral material 24, because the recesses 22, 32, 32 ', etc. are not formed in the process of bending or stretching the vacuum heat insulating materials 21, 31. 34 damage can be suppressed.

  Note that the end recess 22a of the vacuum heat insulating material 21 and the end recesses 32a, 32b, 32c of the vacuum heat insulating material 31 are provided along the edge of the vacuum heat insulating material, and have a concave shape with the outside open. As long as the shape covers the heat radiating pipe 20, any shape other than the L shape illustrated may be used. Similarly, the recess 22 of the vacuum heat insulating material 21 and the recesses 32 and 32 ′ of the vacuum heat insulating materials 31 and 31 ′ may have any shape other than the illustrated shape as long as it is a concave shape covering the heat radiating pipe 20. .

  Further, the depth of the recess 22 and the end recesses 22a and 22b provided in the vacuum heat insulating material 21 exemplified in the embodiment, and the depth of the recesses 32 and 32 'provided in the vacuum heat insulating materials 31 and 31'. The numerical values such as the dimensions, the depth dimensions of the end recesses 32a, 32b, and 32c, the diameter of the heat radiating pipe 20, and the like are merely examples, and can be appropriately selected within the range in which the present invention is established.

DESCRIPTION OF SYMBOLS 1 Refrigerator 5 Refrigeration room door 11 Side plate 12 Back plate 12b Standing part (bending part)
12c Flat part (rear part of back plate)
18 Inner box 19 Outer box 19a R bent part (inner box locking part)
19b Flange part 20 Radiation pipe 20a U-turn part (radiation pipe arranged on the edge side)
20c Straight line part (center side heat dissipation pipe)
21 Vacuum insulation 22 Recess 22a End recess 23 Core 25 Laminated body (raw cotton)
31 Vacuum insulation (vacuum insulation)
31b Bent part (tip part of end recess)
32 recesses 32a, 32b, 32c end recesses 60 heat insulation partition wall 61 communication port (foam heat insulating material intake port)
63 Thermal insulation space

Claims (3)

An inner box disposed inside the outer box is locked via a flange portion formed in the opening of the outer box, and a heat insulating pipe extending along the inner surface of the outer box is provided with a vacuum heat insulating material. A refrigerator in which a heat insulating space between the outer box and the inner box is filled with a foam heat insulating material, and a heat insulating partition wall that partitions the inner space of the inner box is filled with the foam heat insulating material. In
The end recess of the vacuum heat insulating material that covers the heat radiating pipe portion that is arranged closest to the flange portion is provided along the edge of the vacuum heat insulating material with a concave shape that is open to the outside,
An end edge of the end recess on the flange portion side is located in a projection plane of a foam heat insulating material intake formed in the heat insulating partition wall so as to communicate with the heat insulating space and the heat insulating partition wall. A refrigerator characterized by having. In the refrigerator according to claim 1,
The said heat insulating foam intake is formed in the said heat insulation partition wall so that the said flange part may be adjoined, The refrigerator characterized by the above-mentioned. In the refrigerator according to claim 1,
The vacuum heat insulating material is formed of a core material and an outer packaging material for decompressing and packaging the core material,
In the vacuum heat insulating material, in addition to the end recess, a recess covering and covering the heat radiating pipe is further formed on the surface facing the inner surface of the outer box,
The refrigerator, wherein the end recess and the recess are formed by reducing the thickness of the core according to the diameter of the heat radiating pipe.

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