JP2015040634A - Vacuum heat insulation material and refrigerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a refrigerator capable of enhancing a cover ratio by a vacuum heat insulation material with respect to an adiabatic wall without inhibiting foaming of foamed polyurethane foam.SOLUTION: A refrigerator includes piping 15 for heat radiation of an inner wall surface of an outer box 14; and a foamed heat insulation material 21 and a vacuum heat insulation material 19 in space formed between the outer box 14 and an inner box 17. The vacuum heat insulation material 19 has: a core material including a plurality of layers of fiber assemblies 22; and an outer packing material 23 which accommodates the core material and which is decompressed inside. The vacuum heat insulation material 19 includes: a first groove 19a which is formed by changing lamination thickness of the fiber assemblies 22; and a second groove 19b formed by pressing the outer packing material 23 which is decompressed inside. The first groove 19a is located at a thin wall portion where the thickness of the foamed heat insulation material 21 becomes thin.

Description

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

  As prior art of a refrigerator provided with a vacuum heat insulating material, for example, Japanese Patent Application Laid-Open No. 2012-82854 (Patent Document 1), Japanese Patent No. 454526 (Patent Document 2) and the like can be cited.

  Patent Document 1 discloses a refrigerator equipped with a vacuum heat insulating material in which a recess for housing a heat radiating pipe is formed by pressing with a mold.

  Further, Patent Document 2 discloses a refrigerator in which a groove portion is provided in a vacuum heat insulating material facing the heat radiating pipe, and the heat radiating pipe is positioned in the groove portion.

JP 2012-82594 A Japanese Patent No. 4545126

  However, in the configuration of Patent Document 1, the core material is a three-layer laminate other than the heat radiating pipe, whereas the heat radiating pipe portion is a two-layer laminate. Therefore, the heat radiating pipe portion becomes thinner than the other portions, and the heat insulating performance may be lowered.

Moreover, in the structure of patent document 2, the convex part is formed in the part facing a groove part.
Therefore, if the vacuum insulation material is attached to the outer box and the space between the outer box and the inner box is filled with the foam insulation material and foamed, the foam insulation material is used in the part where the space between the outer box and the inner box is narrowed. The unfilled portion is formed, and the heat insulation performance is lowered.

  Then, this invention provides the vacuum heat insulating material and refrigerator which can expand the installation area of a vacuum heat insulating material so that the flow at the time of foaming of a foam heat insulating material may not be inhibited.

  In order to solve the above problems, for example, the configuration described in the claims is adopted. The present application includes a plurality of means for solving the above-mentioned problems. To give an example, foaming in a space formed between the outer box and the inner box and a heat radiation pipe on the inner wall surface of the outer box. A heat insulating material and a vacuum heat insulating material, and the vacuum heat insulating material includes a core material including a plurality of layers of fiber assemblies, and an outer packaging material in which the core material is housed and the inside is decompressed, The vacuum heat insulating material includes a first groove formed by changing a lamination thickness of the fiber assembly, and a second groove formed by pressing the outer packaging material whose pressure is reduced inside, the first groove The groove is located in a thin wall portion where the thickness of the foamed heat insulating material is reduced.

  ADVANTAGE OF THE INVENTION According to this invention, the vacuum heat insulating material and refrigerator which can expand the installation area of a vacuum heat insulating material can be provided so that the flow at the time of foaming of a foam heat insulating material may not be inhibited.

  Problems, configurations, and effects other than those described above will be clarified by the following description of embodiments.

It is a front view of the refrigerator which concerns on the Example of this invention. It is AA sectional drawing of FIG. It is a figure explaining the piping for thermal radiation arrange | positioned at the outer case which concerns on the Example of this invention. It is sectional drawing of the refrigerator which has arrange | positioned the vacuum heat insulating material which concerns on the Example of this invention. It is a partially expanded sectional view of FIG. 6 is a partially enlarged cross-sectional view of a heat insulating wall according to Example 2. FIG. 6 is a partial enlarged cross-sectional view of a heat insulating wall according to Example 3. FIG.

  Hereinafter, an embodiment of the present invention will be described with reference to FIGS.

  FIG. 1 is a front view of a refrigerator according to an embodiment of the present invention. 2 is a cross-sectional view taken along the line AA in FIG.

  In FIG. 1, the refrigerator main body 1 is arranged as a storage room in the order of a refrigerator room 2, an ice making room 3, a second freezing room 4 side by side with the ice making room 3, a first freezing room 5, and a vegetable room 6. Yes. Each of these storage chambers is provided with doors 2a, 3a, 4a, 5a, 6a for closing the front opening. The left and right refrigeration room doors 2a that close the front opening of the refrigeration room 2 are French doors that are individually pivotably held by hinges 2b and open and close. The other doors 3a, 4a, 5a, 6a are drawer-type doors that move in the front-rear direction and close the openings of the storage chambers.

  In FIG. 2, a cooler chamber 7 is formed inside the refrigerator main body 1, and a cooler 8 is accommodated in the cooler chamber 7. A machine room 10 is provided at a position facing the back side of the vegetable room 6 and separated from the heat insulation wall 9, and a compressor 11 is installed in the machine room 10. Although the compressor 11 and the cooler 8 are not shown, a condenser and a capillary tube are sequentially connected by a refrigerant pipe to constitute a refrigeration cycle.

  A cool air circulation fan 12 is disposed above the cooler 8. The cold air circulation fan 12 is for forcedly circulating the cold air cooled by the cooler 8 to the refrigerator compartment 2, the ice making chamber 3, the second freezer compartment 4, the first freezer compartment 5, and the vegetable compartment 6 for cooling. It is. A damper 13 is attached to the downstream side of the cool air circulation fan 12. The damper 13 is for distributing the cold air blown out by the cold air circulation fan 12 to each storage chamber. The operation of the damper 13 is controlled using an output from an operation board (not shown) as an input.

  The front surface of the refrigerator compartment 2 is closed with a refrigerator compartment door 2a. The front surface of the ice making chamber 3 is closed by an ice making door 3a. As shown in FIG. 1, the front surface of the second freezer compartment 4 is closed with a second freezer compartment door 4a. The front surface of the first freezer compartment 5 is closed with a first freezer compartment door 5a. The front surface of the vegetable compartment 6 is closed with a vegetable compartment door 6a. Note that the layout of the storage room and the door is not limited to this, and appropriate addition, deletion, and conversion such as change of the revolving door and drawer door, change of the storage temperature zone, change of the number of storage rooms, and the like are possible.

  FIG. 3 is a view for explaining a heat radiating pipe disposed in the outer box according to the embodiment of the present invention. FIG. 4 is a cross-sectional view of a refrigerator equipped with a vacuum heat insulating material according to an embodiment of the present invention.

  FIG. 3 shows the arrangement of the heat dissipating pipes arranged in the left outer box when the refrigerator is viewed from the front, but the heat dissipating pipes arranged in the right outer box are the same as the left outer box. Description of the right outer box is omitted because of the arrangement form.

  In FIG. 3, the outer box 14 is formed by bending an iron plate. On the inner surface of the outer box 14, a heat dissipation pipe 15 for the condenser is an adhesive tape 16 (in this embodiment, an adhesive tape is used, but the present invention is not limited to this, and an adhesive such as hot melt may be used. Is good). This heat radiating pipe 15 is arranged in parallel with a first heat radiating pipe 15a on the front opening side of the refrigerator body 1, a second heat radiating pipe 15b at the center, and a third heat radiating pipe 15c on the back side. Has been. These first to third heat radiation pipes 15a, 15b, 15c are formed by bending one heat radiation pipe 15 in a meandering manner.

  In FIG. 4, a space 18 is formed between an outer box 14 and an inner box 17 that form the refrigerator main body 1. First to third heat radiation pipes 15a, 15b, and 15c are attached to the inner wall surface of the outer box 14 in the form as shown in FIG. These first to third heat radiation pipes 15 a, 15 b and 15 c are covered with a first vacuum heat insulating material 19. The first to third heat radiation pipes 15 a, 15 b, 15 c and the first vacuum heat insulating material 19 are disposed in the space 18.

  The first vacuum heat insulating material 19 is formed with first to third grooves (or recesses) 19a, 19b, 19c. A first heat radiation pipe 15a is accommodated in the first groove 19a. A second heat radiation pipe 15b is accommodated in the second groove 19b. A third heat radiating pipe 15c is accommodated in the third groove 19c.

  A second vacuum heat insulating material 20 is accommodated in a space 18 on the back side constituting the refrigerator main body 1. The second vacuum heat insulating material 20 is attached to the outer box 12 on the back side by hot melt (not shown).

  Thus, after the 1st and 2nd vacuum heat insulating materials 19 and 20 are affixed on the outer case 12, the foam heat insulating material which makes a foam polyurethane foam an example in the space 18 between the outer case 14 and the inner case 17 is shown. 21 is filled.

  Next, FIG. 5 is a partially enlarged sectional view of FIG. In addition, although only the 1st groove | channel and the 2nd groove | channel are in the vacuum heat insulating material shown in FIG. 5, since the 2nd groove | channel and the 3rd groove | channel are the same, the 3rd groove | channel is abbreviate | omitted.

  In FIG. 5, a first vacuum heat insulating material 19 and a foam heat insulating material 21 are loaded in a space 18 formed between the outer box 14 and the inner box 17. This first vacuum heat insulating material 19 is a core material 22 such as glass wool (which is a raw fiber of a fiber assembly such as glass wool, hereinafter referred to as a fiber assembly 22) and an outer covering material 23 having an adsorbent and a bag-like gas barrier layer ( In the following, it is put in the outer packaging material 23) and the outer packaging material 23 is sealed in a vacuum.

  The fiber assembly 22 includes three layers of a first fiber assembly 22a, a second fiber assembly 22b, and a third fiber assembly 22c. It doesn't matter) The first fiber assembly 22a and the second fiber assembly 22b have the same width. In contrast, the third fiber assembly 22c is shorter in width than the first and second fiber assemblies 22a and 22b. The second groove 19b and the third groove 19c (shown in FIG. 4) are formed by pressing the evacuated first vacuum heat insulating material 19 with a mold. The heat radiating pipe 15b is located in the second groove 19b, and the third heat radiating pipe 15c (shown in FIG. 4) is located in the third groove 19c (shown in FIG. 4).

  Since the 1st groove | channel 19a adjoins to the front-surface opening part of the refrigerator main body 1, and is located in the thin wall part of a heat insulation box, it cannot make it thick like the 2nd and 3rd groove | channels 19b and 19c. Therefore, the first groove 19a according to the present embodiment is not a groove formed by pressing with a mold, and the width of the third fiber assembly 22c is set to the first and second fibers so as to avoid the first heat radiation pipe 15a. It is shorter than the aggregates 22a and 22b, and is stored in the outer packaging material 23 and evacuated. That is, the core material has a plurality of fiber assemblies 22, and the first groove 19 a is formed by making a part of the fiber assemblies 22 shorter than the width of the other fiber assemblies 22.

  That is, in this embodiment, when the first vacuum heat insulating material 19 is pressed to form the second groove 19b, a corrugated convex portion 22d protruding in the direction of the inner box 17 is formed on the opposite side of the second groove 19b. Therefore, even if the second and third grooves 19b and 19c (shown in FIG. 4) are formed, the three layers of the raw cotton 19 are maintained. On the other hand, since the first groove 19a is formed by shortening the first raw cotton 19a, the first groove 19a becomes the first raw cotton 19 of two layers due to a step. Therefore, in the present embodiment, since the first groove 19a can be made thin, it is possible to prevent the first groove 19a portion from inhibiting the rising of the foam heat insulating material 21.

Here, the procedure from the installation of the vacuum heat insulating material to the injection and foaming of the foam heat insulating material will be described below.
(1) A raw cotton roll (glass wool roll) is prepared.
(2) A rectangular raw cotton having a predetermined size is cut or trimmed from the raw cotton roll.
(3) The cut raw cotton is laminated in a plurality of stages (the thickness in the laminated state is about 300 mm) and the adsorbent is sprayed between the raw cottons.
(4) The laminated original surface is inserted into a polyethylene bag and the bag is sealed in a state compressed to about 50 mm. At this time, in order to form the first groove 19a, the third fiber assembly 22c has a shorter width than other raw cotton.
(5) After the sealed bag is inserted into the outer packaging material, a part of the bag is cut to interrupt the compressed state of the raw cotton, and then vacuuming is performed in the outer packaging material.
(6) The outer packaging material that has been vacuumed is sealed (sealed), and the first groove is formed by vacuuming.
(7) Bending or ear-folding the seal portions on the four sides of the outer packaging material that has been sealed to complete the vacuum heat insulating material.
(8) The completed vacuum heat insulating material is pressed with a mold to form second and third grooves.
(9) A vacuum heat insulating material is affixed to the inner surface of the outer box while disposing the heat radiation pipe in the first to third grooves.
(10) Lay down with the back surface of the heat insulation box facing up, and inject foamed heat insulating material from the hole on the back surface to foam.

  As described above, according to the present embodiment, the heat radiation pipe 15 on the inner wall surface of the outer box 14, the foam heat insulating material 21 and the vacuum heat insulating material 19 in the space formed between the outer box 14 and the inner box 15, The vacuum heat insulating material 19 includes a core material including a plurality of layers of fiber assemblies 22 and an outer packaging material 23 in which the core material is housed and the inside is decompressed. The first groove 19a includes a first groove 19a formed by changing the stacking thickness of the aggregate 22, and a second groove 19b formed by pressing the outer packaging material 23 whose inside has been decompressed. The material 21 is located in a thin wall portion where the thickness is reduced. Thereby, the refrigerator which has high heat insulation performance can be provided. Moreover, since a vacuum heat insulating material can be arrange | positioned also to the groove | channel located in the thin part of a heat insulation box, the coverage with the vacuum heat insulating material with respect to a heat insulation box increases, and it can aim at the improvement of heat insulation performance.

  In addition, as shown in FIG. 5, the 2nd groove | channel 19b (width A dimension) formed by pressing the vacuum heat insulating material 19 with a metal mold | die, and the convex part formed in the other side of this 2nd groove | channel 19b The dimensional relationship with 22d (width B dimension) is A> B. Thereby, the width | variety of the 2nd groove | channel 19b can be ensured widely, and positioning of the piping 15 for heat radiation becomes easy.

  FIG. 6 is a partially enlarged cross-sectional view of a heat insulating wall according to the second embodiment.

  In FIG. 6, a first vacuum heat insulating material 19 and a foam heat insulating material 21 are loaded in a space 18 formed between the outer box 14 and the inner box 17. The vacuum heat insulating material 19 is obtained by placing a core material 22 and an adsorbent in a bag-like outer packaging material 23 and sealing the outer packaging material 23 with a vacuum.

  The fiber assembly 22 includes three layers of a first fiber assembly 22a, a second fiber assembly 22b, and a third fiber assembly 22c. The second fiber assembly 22b has a longer width than the first fiber assembly 22a and the third fiber assembly 22c, and the third fiber assembly 22c has a shorter width than the first fiber assembly 22a. ing. The second groove 19b and the third groove 19c (shown in FIG. 4) are formed by pressing the evacuated first vacuum heat insulating material 19 with a mold. The second heat radiating pipe 15b is located in the second groove 19b, and the third heat radiating pipe 15c (shown in FIG. 4) is located in the third groove 19c (shown in FIG. 4).

  The first groove 19a in which the first heat radiation pipe 15a is located is close to the front opening of the refrigerator body 1 and is located in the thin wall portion of the heat insulation box, so that the second and third grooves 19b and 19c Can not be so thick. Therefore, in this embodiment, the width of the third fiber assembly 22c is set to be larger than that of the first and second fiber assemblies 22a and 22b so as to avoid the first heat radiating pipe 15a instead of the groove due to pressing in the mold. And the second fiber assembly 22b is made longer than the first fiber assembly 22a, accommodated in the outer packaging material 23, and formed into a first groove 19a formed by evacuation.

  That is, in this embodiment, when the first vacuum heat insulating material 19 is pressed to form the second groove 19b, a corrugated convex portion 22d protruding in the direction of the inner box 17 is formed on the opposite side of the second groove 19b. Therefore, even if the second and third grooves 19b and 19c are formed, the three layers of the raw cotton 19 are maintained. Further, the first groove 19a is formed by a step because the third fiber assembly 22c is formed shorter than the first fiber assembly 22a and the second fiber assembly 22b.

  On the other hand, by making the first fiber assembly 22a shorter than the second fiber assembly 22b, a wider foaming path on the back side of the first groove 19a is secured. For this reason, the foam heat insulating material 21 does not hinder rising due to foaming and can rise smoothly. Further, as shown in FIG. 6, it is possible to further lengthen the second fiber assembly 22b by making the foaming path wider, and in that case, the coverage of the vacuum heat insulating material to the heat insulating wall is increased. be able to.

  FIG. 7 is a partially enlarged cross-sectional view of a heat insulating wall according to the third embodiment.

  In FIG. 7, a first vacuum heat insulating material 19 and a foam heat insulating material 21 are loaded in a space 18 formed between the outer box 14 and the inner box 17. The vacuum heat insulating material 19 is obtained by placing a core material 22 and an adsorbent in a bag-like outer packaging material 23 and sealing the outer packaging material 23 with a vacuum.

  The fiber assembly 22 includes three layers of a first fiber assembly 22a, a second fiber assembly 22b, and a third fiber assembly 22c. The first fiber assembly 22a and the second fiber assembly 22b have the same width. On the other hand, the third fiber assembly 22c is shorter in width than the first and second fiber assemblies 22a and 22b. The second groove 19b and the third groove 19c (shown in FIG. 4) are formed by pressing the evacuated first vacuum heat insulating material 19 with a mold. The second heat radiating pipe 15b is located in the second groove 19b, and the third heat radiating pipe 15c (shown in FIG. 4) is located in the third groove 19c (shown in FIG. 4).

  Since the 1st groove | channel 19a adjoins to the front-surface opening part of the refrigerator main body 1, and is located in the thin wall part of a heat insulation box, it cannot make it thick like the 2nd and 3rd groove | channels 19b and 19c. Therefore, in this embodiment, the width of the third fiber assembly 22c is set to be larger than that of the first and second fiber assemblies 22a and 22b so as to avoid the first heat radiating pipe 15a instead of the groove due to pressing in the mold. The first groove 19a is formed by shortening the length and storing the outer packaging material 23 in a vacuum. Further, a bent portion 19d bent in the direction of the outer box 14 is formed at the tip end portions (near the front opening of the heat insulating box) of the first and second fiber assemblies 22a and 22b.

  That is, in this embodiment, when the vacuum heat insulating material 19 is pressed to form the second groove 19b, a corrugated convex portion 22d protruding in the direction of the inner box 17 is formed on the opposite side of the second groove 19b. Even if the second and third grooves 19b and 19c are formed, the three layers of the raw cotton 19 are maintained. On the other hand, since the first groove 19a is formed by shortening the third raw cotton 19c, it is formed by a step. Accordingly, the first groove 19a can be thinned.

  In addition, since the tip of the first vacuum heat insulating material 19 is a bent portion 19d bent in the direction of the outer box 14, a wider foaming path on the back side of the first groove 19a is secured, and the foam heat insulating material 21 rises. There is no inhibition.

  As described above, according to the present invention, not only can the coverage of the vacuum heat insulating material to the outer box be improved by the combined use of the groove due to the pressing of the mold and the groove due to the removal of the raw cotton, but also the foaming rise of the foamed polyurethane foam by the groove can be achieved. It was able to prevent obstruction.

  In addition, this invention is not limited to an above-described Example, Various modifications are included. For example, the above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described. Also, a part of the configuration of one embodiment can be replaced with the configuration of another embodiment. Further, it is possible to add, delete, and replace other configurations for a part of the configuration of each embodiment.

DESCRIPTION OF SYMBOLS 1 ... Refrigerator main body 9 ... Heat insulation wall 14 ... Outer box 15 ... Radiation piping 15a ... 1st radiation pipe 15b ... 2nd radiation pipe 15c ... 3rd radiation pipe 16 ... Adhesive tape 17 ... Inner box 18 ... Space 19 ... Vacuum heat insulating material 19a ... First groove 19b ... Second groove 19c ... Third groove 19d ... Bending part 20 ... Vacuum heat insulating material 21 ... Foam heat insulating material 22 ... Fiber assembly 22a ... First fiber Aggregate 22b ... second fiber aggregate 22c ... third fiber aggregate 22d ... convex portion 23 ... outer packaging material

Claims (5)

A heat dissipating pipe on the inner wall surface of the outer box, and a foam heat insulating material and a vacuum heat insulating material in a space formed between the outer box and the inner box,
The vacuum heat insulating material has a core material including a plurality of layers of fiber aggregates, and an outer packaging material in which the core material is stored and the inside is decompressed,
The vacuum heat insulating material includes a first groove formed by changing a laminated thickness of the fiber assembly, and a second groove formed by pressing the outer packaging material whose pressure is reduced inside, the first groove The refrigerator is characterized in that the groove is located in a thin wall portion where the thickness of the foam insulation becomes thin. The refrigerator according to claim 1,
The core material has a multi-layer fiber assembly,
The refrigerator is characterized in that the first groove is formed by making a part of the fiber assemblies shorter than the width of the other fiber assemblies. The refrigerator according to claim 1,
The said core material has a fiber assembly of at least 3 layers, The intermediate | middle layer among the said fiber assembly is a refrigerator characterized by the width | variety being longer than another layer. The refrigerator according to claim 1,
The refrigerator is characterized in that an end portion of the vacuum heat insulating material has a bent portion in the first groove direction. A core material including a plurality of layers of fiber assemblies, and an outer packaging material in which the core material is stored and the inside is decompressed,
The vacuum heat insulating material characterized by including the 1st groove | channel formed by changing the lamination | stacking thickness of the said fiber assembly, and the 2nd groove | channel formed by pressing the said outer packaging material which pressure-reduced the inside.