JP6113612B2 - Vacuum heat insulating material and refrigerator using the same - Google Patents

Description

  The present invention relates to a refrigerator that refrigerates or freezes foods and beverages, and particularly relates to a vacuum heat insulating material housed in a heat insulating box and a refrigerator filled with polyurethane foam by fixing the vacuum heat insulating material in the heat insulating box. is there.

As a social effort to prevent global warming, energy conservation is being promoted in various fields in order to control carbon dioxide (CO ₂ ) emissions. For example, even in recent refrigerators that are electrical products, particularly refrigerator-related home appliances, refrigerators with improved heat insulation performance have become mainstream from the viewpoint of reducing power consumption. For that purpose, a structure in which the cool air inside the refrigerator does not escape to the outside of the refrigerator is indispensable.

  A refrigerator is comprised by the heat insulation box which is a refrigerator main body, and the door which opens and closes the front opening part of the storage chamber provided in the heat insulation box. In order to prevent the cold air inside the refrigerator from escaping to the outside of the refrigerator, it is effective to improve the heat insulation performance of the heat insulation box and the heat insulation door. For this reason, polyurethane foam is filled in the heat insulation box and the heat insulation door, and a vacuum heat insulating material is disposed inside the polyurethane foam to suppress heat transfer.

  Generally, the refrigerator heat insulation box is composed of an outer box made of iron plate and an inner box made of synthetic resin, and the space between the outer box and the inner box is a vacuum insulation fixed to the inner wall of the outer box. A heat insulating material using polyurethane foam having bubbles is filled so as to cover the material. This polyurethane foam is obtained by reacting a polyol component and an isocyanate component in the presence of a foaming agent, a reaction catalyst, and a foam stabilizer.

  By the way, the refrigerating cycle mounted in a refrigerator is connected by piping in order of a compressor, a condenser, a capillary tube, and an evaporator. In this refrigeration cycle, since the refrigerant discharged from the compressor is hot, it needs to be cooled and condensed (liquefied). In general refrigerators, heat radiation piping connected to the condenser is formed by bending an iron plate. The outer box is fixed in close contact with the inner surface of the outer box, and the outer box is used as a heat sink for the heat radiating pipe.

  As an example in which the heat radiation pipe connected to such a condenser is fixed to the inner surface of the outer box, Japanese Patent Application Laid-Open No. 2008-64323 (Patent Document 1), Japanese Patent Application Laid-Open No. 2012-82954 (Patent Document 2), etc. Are known. In these patent documents, a vacuum heat insulating material is put in close contact with the heat radiating pipe, and polyurethane foam is filled from above.

  Patent Document 1 discloses that the thickness of the vacuum heat insulating material is uniformly formed by forming a convex portion having a width wider than the housing groove on the back surface side of the housing groove in which the heat radiating pipe is housed. . For this reason, it is disclosed that the inclination angle of the convex portion is made smaller than the inclination angle of the housing groove to ensure the thickness. Moreover, in patent document 2, a fiber laminated body is piled up so that the accommodation groove | channel which accommodates heat radiating piping may be formed on a fiber laminated body, and it accommodates in the surface of an outer packaging material by vacuuming after accommodating in an outer packaging material in this state It is disclosed that the formation of the groove prevents the core material from being cut by press working and the heat insulation performance from being deteriorated.

JP 2008-64323 A JP 2012-82594 A

  By the way, in the heat insulation box containing the heat insulating material using both the vacuum heat insulating material and the urethane foam, when attaching the vacuum heat insulating material to the inner surface of the side wall of the outer box where the heat radiating pipe is disposed, The inner packaging material made of glass wool or the like needs to be provided with a housing groove processed in accordance with the arrangement shape of the heat radiating pipe. This inner packaging material is an aggregate of inorganic fibers that are made of glass or the like and melted into fiber, and is white wool (hereinafter referred to as raw cotton) that does not contain a binder (binder) and does not contain a binder. It has a certain degree of flexibility.

  Then, as a housing groove that matches the arrangement shape of the heat radiating pipe, for example, as disclosed in Patent Document 2, another sheet having a shape that avoids the heat radiating pipe on the raw cotton that is a base fabric formed by stacking two raw cottons. A storage groove for storing heat-dissipating piping was made by overlapping the raw cotton. In the vacuum heat insulating material having such a structure, the region other than the region (accommodating groove) in which the heat radiating pipe is accommodated is three layers of raw cotton, whereas the region in which the heat radiating pipe is accommodated is two layers of raw cotton. Therefore, the area for housing the heat radiating pipe is a vacuum heat insulating material thinner than the other areas. For this reason, the heat | fever of the piping for heat radiation penetrate | invades in the store | warehouse | chamber through the area | region in which the two layers of heat radiation piping are accommodated, and there existed a subject that the heat insulation performance fell.

  From such a viewpoint, the present inventors formed a housing groove for housing the heat radiation pipe described in Patent Documents 1 and 2 in the vacuum heat insulating material to cover the heat radiation pipe, The heat leakage was observed. That is, the thickness is uniform in the vacuum heat insulating material in which the raw cotton layer is partially thinned as in Patent Document 1 and the housing groove is formed, and in the portion facing the heat radiation pipe of the vacuum heat insulating material as in Patent Document 2. The heat insulation performance was confirmed using a vacuum heat insulating material in which a housing groove was formed using a mold.

  As a result, when the raw cotton in the housing groove part is thinner than the raw cotton in other parts as in Patent Document 1, the heat insulating performance is inferior, and the thickness of the raw cotton in the housing groove part facing the heat radiation pipe as in Patent Document 2 However, it was found that those having a thickness substantially equal to the thickness of the other portions have good heat insulation performance. Therefore, it is more advantageous from the viewpoint of heat insulation performance to use the vacuum heat insulating material having the configuration as in Patent Document 2. However, in the vacuum heat insulating material having the structure shown in Patent Document 2, it has been found that the following problems are newly developed when actually employed as a product.

  The housing groove for housing the heat radiation pipe is wide in range with respect to the size and shape of the heat radiation pipe due to variations in manufacturing dimensions, assembly work, or the layout shape of the heat radiation pipe. It is necessary to form an accommodation groove having a dimensional margin. On the other hand, in the case where the housing groove having a dimensional allowance is not formed, there is a possibility that the area other than the housing groove interferes with the heat radiation pipe and the polyurethane foam is not filled as designed.

  In this way, when the housing groove has a dimensional allowance with respect to the heat radiation pipe, a relatively large gap is formed between the housing groove of the vacuum heat insulating material, the inner wall surface of the outer box, and the heat radiation pipe. In this state, filling and foaming of urethane foam are performed.

  And when such a large gap exists, air remains in the gap, or polyurethane foam enters and heat transfer occurs through a path different from that of the vacuum heat insulating material, so that the heat insulation performance is significantly reduced. It may occur.

  Also, in some cases, polyurethane foam intrudes and foams (expands), causing the vacuum heat insulating material to deviate from a predetermined fixed position, and the deterioration of the heat dissipation performance from the heat dissipation piping by the outer box due to the presence of polyurethane foam. It may occur. In any case, if a relatively large gap is formed between the housing groove of the vacuum heat insulating material, the inner wall surface of the outer box, and the heat radiating pipe, one or more problems as described above may occur, which is an undesirable effect. Will come to give.

  Therefore, it can be seen that in order to make this large gap as small as possible, it is only necessary to deform the vacuum heat insulating material having flexibility so that the housing groove is brought close to the heat radiation pipe. However, when forming a housing groove having a dimensional allowance over a wide range with respect to the size and shape of the heat radiating pipe, the configuration described in Patent Document 2 has a new as described below. Challenges emerge.

  That is, the thickness of the cross section of the region where the receiving groove is formed has substantially the same thickness as the thickness of the cross section of the other region, and the angle of the side wall forming the receiving groove is the convex portion of the region facing the receiving groove Since the angle of the side wall forming the wall is larger, the rigidity of the housing groove is increased and the structure is difficult to be deformed. For this reason, when fixing the vacuum insulation material or foaming the polyurethane foam, if the vacuum insulation material is deformed so as to eliminate the gap with a strong force (large load), the outer packaging material and the core material around the accommodation groove will be damaged. There is a risk of deteriorating the insulation performance.

  An object of the present invention is to provide a vacuum heat insulating material that secures heat insulating performance without reducing the layer of raw cotton and has improved adhesion to the inner wall surface of the heat radiating pipe and outer box, and a refrigerator using the same. is there.

  A feature of the present invention is that a housing groove for housing the heat radiation pipe is formed on one surface of the outer packaging material that houses the laminated raw cotton, and a raised portion corresponding to the housing groove is formed on the other surface, and the width of the housing groove is increased. The width of the side wall constituting the housing groove is made smaller than the width of the raised part and the slope of the side wall constituting the raised part is made smaller.

  According to the present invention, since the raw cotton layer is not reduced, the heat insulating performance is ensured, and the vicinity of the housing groove is easily deformed, so that the heat insulating piping of the vacuum heat insulating material and the adhesion to the inner wall surface of the outer box are improved. Will be able to.

It is a front view of the refrigerator with which this invention is applied. It is sectional drawing which shows the longitudinal cross-section of the refrigerator shown in FIG. It is a block diagram which shows the piping for thermal radiation arrange | positioned in the outer box of a heat insulation box. It is sectional drawing at the time of attaching the vacuum heat insulating material which becomes the 1st Embodiment of this invention to piping for thermal radiation. It is sectional drawing at the time of attaching a vacuum heat insulating material to the inner wall face of an outer box in order to demonstrate the view of this invention. It is a front view at the time of attaching the vacuum heat insulating material which becomes the 2nd Embodiment of this invention to a heat-generating electrical component. It is sectional drawing at the time of attaching the vacuum heat insulating material which becomes 2nd Embodiment shown in FIG. 6 to a heat-generating electrical component. FIG. 8 is a cross-sectional perspective view of the embodiment shown in FIG. 7. It is a section perspective view showing the modification of a 2nd embodiment.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. However, the present invention is not limited to the following embodiments, and various modifications and application examples are included in the technical concept of the present invention. Is also included in the range.

  Before describing specific embodiments of the present invention, the configuration of an intercooled refrigerator (hereinafter simply referred to as a refrigerator) to which the present invention is applied will be described with reference to FIGS. 1 and 2.

  FIG. 1 is a front external view of the refrigerator, and FIG. 2 is a cross-sectional view showing a longitudinal cross section of FIG. In FIG. 2, the cross section of the ice making chamber is not shown.

  1 and 2, the refrigerator 1 includes a refrigerator room 2, an ice making room 3, an upper freezer room 4, a lower freezer room 5, and a vegetable room 6 from above. Here, the ice making chamber 3 and the upper freezer compartment 4 are provided side by side between the refrigerator compartment 2 and the lower freezer compartment 5. As an example, the refrigerating room 2 is a storage room having a refrigeration temperature range of about + 3 ° C. and the vegetable room 6 is a refrigerating temperature zone of about + 3 ° C. to + 7 ° C. Further, the ice making room 3, the upper freezing room 4, and the lower freezing room 5 are storage rooms in a freezing temperature zone of approximately −18 ° C.

  The refrigerating room 2 is provided with a folding door (so-called French type) refrigerating room doors 2a and 2b divided into left and right sides on the front side. The ice making room 3, the upper freezing room 4, the lower freezing room 5, and the vegetable room 6 are each provided with a drawer type ice making room door 3a, an upper freezing room door 4a, a lower freezing room door 5a, and a vegetable room door 6a.

  In addition, a packing (not shown) with magnets built in along the outer edge of each door is provided on the surface of each door on the storage room side. When each door is closed, the outside of the refrigerator formed of an iron plate is provided. It is set as the structure which closely_contact | adheres to the flange of a box and each partition iron plate mentioned later, and the penetration | invasion of the external air into a storage chamber, and the leak of the cold air from a storage chamber.

  Here, as shown in FIG. 2, the machine room 11 is formed in the lower part of the refrigerator main body 10, and the compressor 12 is incorporated in this. The cooler housing chamber 13 and the machine chamber 11 are communicated with each other by a drain passage 14 so that condensed water can be discharged.

  As shown in FIG. 2, the outside of the refrigerator body 10 and the inside of the refrigerator are separated by a heat insulating box 15 formed by filling a foam heat insulating material (foamed polyurethane) between the inner box and the outer box. Yes. Further, the heat insulating box 15 of the refrigerator body 10 has a plurality of vacuum heat insulating materials 16 mounted thereon. The refrigerator body 10 is divided into a refrigerator compartment 2, an upper freezer compartment 4, and an ice making chamber 3 (see FIG. 1, the ice making chamber 3 is not shown in FIG. 2) by an upper heat insulating partition wall 17. A lower freezer compartment 5 and a vegetable compartment 6 are partitioned by a wall 18.

  In addition, a horizontal partition is provided in the upper part of the lower freezer compartment 5. The horizontal partitioning part partitions the ice making room 3 and the upper freezing room 4 and the lower freezing room 5 in the vertical direction. Moreover, the vertical partition part which partitions off between the ice-making room 3 and the upper freezer compartment 4 in the left-right direction is provided in the upper part of the horizontal partition part.

  A horizontal partition part contacts the packing (not shown) provided in the surface at the side of the storage room of the lower freezer compartment door 5a with the front surface of the lower heat insulation partition wall 18, and the front surface of the left and right side walls. Packings (not shown) provided on the storage room side surfaces of the ice making room door 3a and the upper freezing room door 4a are in contact with the horizontal partition, the vertical partition, the upper heat insulating partition wall 51, and the front surfaces of the left and right side walls of the refrigerator body 1. Thus, the movement of cold air between each storage room and each door is suppressed.

  As shown in FIG. 2, the upper freezer compartment 4, the lower freezer compartment 5, and the vegetable compartment 6 are attached with doors 4a, 5a, 6a provided in front of the respective storage compartments. The upper freezer compartment 4 accommodates and arranges an upper frozen storage container 41, and the lower freezer compartment 5 accommodates and arranges an upper frozen storage container 61 and a lower frozen storage container 62. Furthermore, the vegetable compartment 6 accommodates and arranges an upper vegetable storage container 71 and a lower vegetable storage container 72.

  Then, the ice making room door 3a, the upper freezing room door 4a, the lower freezing room door 5a, and the vegetable room door 6a are each put on a handle portion (not shown) and pulled out to the front side, thereby making an ice making storage container 3b (not shown). ), The upper frozen storage container 41, the lower frozen storage container 62, and the lower vegetable storage container 72 can be pulled out.

  More specifically, the lower refrigerated storage container 62 has a support arm 5d attached to the box inside the freezer compartment door, and a flange portion on the upper side of the lower refrigerated storage container 62 is suspended. Only the container 62 is withdrawn. The upper frozen storage container 61 is placed on an uneven portion (not shown) formed on the side wall of the freezer compartment 5 and is slidable in the front-rear direction.

  Similarly, the lower vegetable storage container 72 has a flange portion suspended on a support arm 6d attached to the inner box of the vegetable compartment door 6a, and the upper vegetable storage container 71 is placed on the uneven portion of the side wall of the vegetable compartment. In addition, the vegetable room 6 is provided with an electric heater 6C fixed to the heat insulating box 15, and a temperature suitable for storing vegetables so that the temperature of the vegetable room 6 is not overcooled by the electric heater 6C. It is trying to become. The electric heater 6C may be provided if necessary, but in the present embodiment, the electric heater 6C is provided so that vegetables can be stored better.

  Next, the cooling method of the refrigerator of this embodiment is demonstrated. A refrigerator housing chamber 13 is formed in the refrigerator main body 1, and a cooler 19 is provided therein as a cooling means. The cooler 19 (for example, a fin tube heat exchanger) is provided in a cooler housing chamber 13 provided at the back of the lower freezer compartment 5. A blower 20 (a propeller fan as an example) is provided as a blowing means in the cooler accommodating chamber 13 and above the cooler 19.

  Air cooled by heat exchange in the cooler 19 (hereinafter, low-temperature air heat-exchanged by the cooler 19 is referred to as “cold air”) is sent by the blower 20 to the refrigerator compartment air duct 21, the freezer compartment air duct 22, and It is sent to each storage room of the refrigeration room 2, the ice making room 3, the upper freezing room 4, the lower freezing room 5, and the vegetable room 6 through an ice making room air duct (not shown).

  The blast to each storage room is sent to the first blast control means (hereinafter referred to as the refrigeration room damper 23) for controlling the amount of air sent to the refrigeration room 2 in the refrigeration temperature zone, and to the freezer compartments 4 and 5 in the freezing temperature zone. It is controlled by second air flow control means (hereinafter referred to as freezer compartment damper 24) that controls the air flow. Incidentally, the air ducts to the refrigerator compartment 2, the ice making room 3, the upper freezer room 4, the lower freezer room 5, and the vegetable room 6 are arranged on the back side of each storage room of the refrigerator body 1 as shown by broken lines in FIG. Is provided. Specifically, when the refrigerator compartment damper 23 is in the open state and the freezer compartment damper 24 is in the closed state, the cold air is sent to the refrigerator compartment 2 from the outlets 25 provided in multiple stages via the refrigerator compartment air duct 21.

  The cold air that has cooled the refrigerator compartment 2 is provided on the lower right rear side of the lower heat insulating partition wall 18 from the refrigerator compartment return port 26 provided in the lower part of the refrigerator compartment 2 through the refrigerator compartment-vegetable compartment communication duct 27. The air is blown from the vegetable room outlet 28 to the vegetable room 6. The return cold air from the vegetable compartment 6 passes from the vegetable compartment return duct inlet 29 provided in front of the lower part of the lower heat insulating partition wall 18 through the vegetable compartment return duct 30 and from the vegetable compartment return duct outlet to the lower part of the cooler housing chamber 13. Return to. In addition, it is good also as a structure which returns to the lower right part seeing from the upper surface of the cooler storage chamber 12 in FIG. 3, without connecting the refrigerator compartment-vegetable compartment communication duct 27 to the vegetable compartment 6 as another structure. As an example in this case, a vegetable room air duct is arranged at the front projection position of the refrigerator compartment-vegetable room communication duct 27, and the cold air heat-exchanged by the cooler 19 is directly blown from the vegetable room outlet 28 to the vegetable room 6. Will come to do.

  Although not shown in detail in the figure, the refrigeration cycle mounted in the refrigerator is connected by piping in the order of the compressor, the condenser, the capillary tube, and the evaporator. In this refrigeration cycle, since the refrigerant discharged from the compressor is high temperature, it needs to be cooled and condensed (liquefied), and the inner surface of the outer box formed by folding a steel plate by a heat radiation pipe connected to one condenser The outer box is used as a heat radiating plate for heat radiating piping.

  FIG. 3 shows a mounting example of the heat radiation pipe fixed to the inner wall surface of the outer box 15A. In FIG. 3, the outer box 15A is formed by bending a steel plate. On the inner surface of the outer box 15A, the heat radiation pipes 80 and 81 of the condenser are adhesive tape (in this embodiment, the 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). The heat radiation pipes 80 and 81 are provided at least on both side surfaces and the back surface of the refrigerator body 10. For example, the heat radiation pipes 80 provided on both side surfaces are arranged in parallel with a first heat radiation pipe 80A on the front opening side, a second heat radiation pipe 80B in the center, and a third heat radiation pipe 80C on the back side. These are formed by meandering and bending a single heat radiation pipe 80.

  As shown in FIG. 3, the heat radiating pipe 80 (indicated by a thick broken line in FIG. 3) is between the both sides of the heat insulating box 15 and the inner box of the outer box 15A constituting the ceiling surface. It arrange | positions so that the inner wall face of 15A may be touched. Since the outer box 15A is made of a steel plate, heat is favorably radiated from the outer surface of the outer box 15A to the outside air. Further, the heat radiation pipe 81 (indicated by a thin dotted line in FIG. 3) is disposed between the outer box 15A and the inner box on the back surface of the heat insulating box 15 so as to be in contact with the surface of the outer box 15A. . The back surface of the heat insulation box 15 is installed so as to be close to or in contact with a wall of a kitchen or the like at the time of installation.

  Next, the first embodiment of the present invention in the refrigerator configured as described above will be described with reference to FIGS. Here, FIG. 4 shows a cross-section obtained by cutting off the front opening side of one side wall of the heat insulating box 15.

  As shown in FIG. 4, a heat insulating space 82 is formed between the outer box 15 </ b> A and the inner box 15 </ b> B forming the refrigerator main body 10. The heat radiating pipes 80A and 80B are attached and fixed to the inner wall surface of the outer box 15A in the arrangement shape shown in FIG. Here, the heat radiating pipe 80C is not shown. The heat radiating pipes 80 </ b> A and 80 </ b> B are covered with the vacuum heat insulating material 16, and the heat radiating pipes 80 </ b> A and 80 </ b> B and the vacuum heat insulating material 16 are disposed in the heat insulating space 82.

  In addition, housing grooves 83A and 83B for housing the heat radiation pipes 80A and 80B are formed on the outer surface 16A of the vacuum heat insulating material 16 facing the inner wall surface of the outer box 15A. Of course, an accommodation groove 83C for accommodating the heat radiation pipe 80C is also provided.

  On the other hand, a raised portion 84B is formed on the inner side surface 16B opposite to the outer side surface 16A facing the inner wall surface of the outer box 15A of the vacuum heat insulating material 16 so as to correspond to the formation region of the housing groove 83B. Similarly, a raised portion 84C is formed so as to correspond to a formation region of a housing groove 83C (not shown). However, the raised portion is not formed in the portion corresponding to the formation region of the accommodation groove 83A. The details of the receiving groove 83 and the raised portion 84 will be described with reference to FIG.

  The vacuum heat insulating material 16 is obtained by storing raw cotton and a getter agent (drying agent) in an outer packaging material made of a bag-shaped metal foil, and reducing the pressure inside the outer packaging material and sealing it to form a plate. In this embodiment, the raw cotton is composed of three layers of a first raw cotton 85A, a second raw cotton 85B, and a third raw cotton 85C from the side close to the inner wall surface of the outer box 15A. However, the present invention is not limited to this, and the number of layers other than three layers may be used.

  Here, in this embodiment, the length in the width direction of the first raw cotton 85A on the side close to the inner wall surface of the outer box 15A is shorter than the second and third raw cotton 85B and 85C, and this portion is used to store the housing groove 83A. To form. That is, as shown in FIG. 4, the front opening side of the heat insulation box 15 is thin. This is because the front opening side of the inner box 15B is enlarged so that food can be taken out and stored easily. For this reason, since the thickness of the front opening side of the heat insulation box 15 is reduced, the housing groove 83A for housing the first heat radiation pipe 80A on the front opening side, and the raised portion 84A corresponding thereto, When formed from three layers of raw cotton 85A, 85B, 85C like the other accommodating groove 83B, raised portion 84B, accommodating groove 83C, raised portion 84C, the gap between the vacuum heat insulating material 16 and the inner box 15B is shortened, This is because the fluidity of the polyurethane foam 86 may be adversely affected.

  Therefore, in this embodiment, the first heat radiating pipe 80A on the front opening side uses the raw cotton 85B and the raw cotton 85C, and the first heat radiating pipe 80A on the front opening side is accommodated in a portion where the raw cotton 85A is shortened. A groove 83A is formed, and the raised portion 84C is omitted. As a result, a sufficient gap between the vacuum heat insulating material 16 and the inner box 15B can be secured, and the fluidity of the polyurethane foam is not adversely affected.

  Of course, the housing groove 83A for housing the first heat radiating pipe 80A on the front opening side, and the raised portions corresponding to the housing grooves 83A, the other housing grooves 83B, the raised portions 84B, the housing grooves 83C, and the raised portions 84C are three. It is obvious that it is not necessary to adopt such a configuration even if the layers are formed from the raw cottons 85A, 85B and 85C as long as the flowability of the polyurethane foam is not adversely affected.

  And the method of forming the accommodation grooves 83B and 83C and the raised portions 84B and 84C in the vacuum heat insulating material 16 that is sealed and formed into a plate shape after decompressing the outer packaging material can be performed as follows. For example, the vacuum heat insulating material 16 completed by evacuation is pressed by an upper mold and a lower mold. That is, the upper mold is provided with projections that form the receiving grooves 83B and 83C, and the lower mold is provided with grooves that form the raised portions 84B and 84C so as to face the projections. Therefore, by holding the vacuum heat insulating material 16 between the upper mold and the lower mold and pressing them, the housing grooves 83B and 83C and the raised portions 84B and 84C having a desired shape can be obtained.

  Although the above description was about the vacuum heat insulating material used for the both sides | surfaces of the heat insulation box 15, since it is the same also about a back surface, description is abbreviate | omitted. The same applies to the following.

  Next, the accommodating portions 83B and 83C and the raised portions 84B and 84C will be described in detail with reference to FIG. 5. In FIG. 5, the accommodating portion 83B and the raised portions 84B will be described as representatives. In FIG. 5, a heat radiating pipe 80B is in contact with and fixed to the inner wall surface of the outer box 15A so that heat can be transferred. A vacuum heat insulating material 16 is fixed to the inner wall surface of the outer box 15A so as to cover the heat radiation pipe 80B. In this fixing method, double-sided tape is used to bond the vacuum heat insulating material 16 and the inner wall surface of the outer box 15A.

  A housing groove 83B for housing the heat radiating pipe 80B is formed on the outer surface 16A of the vacuum heat insulating material 16 facing the inner wall surface of the outer box 15A. The housing groove 83B includes an upper wall portion 83B-U and side wall portions 83B-S formed on both sides of the upper wall portion 83B-U. The housing groove 83B is formed continuously along the heat radiation pipe 80B.

  On the other hand, a raised portion 84B is formed on the inner side surface 16B opposite to the outer side surface 16A facing the inner wall surface of the outer box 15A of the vacuum heat insulating material 16 so as to correspond to the formation region of the housing groove 83B. The raised portion 84B includes an upper surface portion 84B-U and side wall portions 84B-S formed on both sides of the upper surface portion 84B-U. This raised portion 84B is also formed continuously along the heat radiation pipe 80B. Such an accommodation groove 83B and the raised portion 84B can be formed by pressing as described above.

  In this embodiment, the relationship between the slope of the side wall portion 83B-S of the housing groove 83B, the slope of the side wall portion 84B-S of the raised portion 84B, and the starting point of these slopes has an important meaning. As described above, on the premise that heat insulation performance is ensured without reducing the raw cotton layer, the vicinity of the housing groove 83B is formed into a shape that can be easily deformed, and the vacuum heat insulating material 16 is used as the inner wall surface of the heat radiating pipe 80B or the outer box 15A. The aim of the present embodiment is to deform it so that it is in close contact with.

  For this reason, in the present embodiment, first, the point P where the side wall 83B-S rises from the outer surface 16A facing the inner wall surface of the outer box 15A of the vacuum heat insulating material 16, and the side wall 83B-S is the upper wall 83B-. That is, the rising point S of the side wall 84B-S of the raised portion 84B is located in the region R between the end points Q that end at U. In the present embodiment, the end point T where the side wall portion 84B-S ends at the upper surface portion 84B-U of the raised portion 84B is also formed so as to be located in the region R.

  That is, the raised portion 84 </ b> B is included in the projection region obtained by projecting the formation region of the housing groove 83 </ b> B onto the inner side surface 16 </ b> B of the vacuum heat insulating material 16. That is, the width between the rising start points S where the side wall portions 84B-S on both sides of the raised portion 84B rise within the width between the rising start points P where the side wall portions 83B-S on both sides of the housing groove 83B rise. It is configured to be included.

  In addition, the rising start point S of the side wall portion 84B-S of the raised portion 84B is located in the region R where the gradient of the side wall portion 83B-S of the accommodation groove 83B exists. Accordingly, the distance between the rising start point S of the side wall portion 84B-S and the slope portion of the side wall portion 83B-S of the accommodation groove 83B is shorter than other regions, and deformation can be easily caused.

  Furthermore, in this embodiment, the side wall portion 84B-S of the raised portion 84B rises and the starting point S is determined so as to be near the center of the region R where the gradient of the side wall portion 83B-S of the receiving groove 83B exists. Yes. As described above, when the rising start point S of the side wall portion 84B-S is located near the center of the region R, the side wall portion 83B-S of the housing groove 83B is formed by the load applied to the vicinity of the rising start point S. It becomes easy to deform | transform toward the inner wall part of this, and the piping 80B for heat radiation, and it becomes possible to improve adhesiveness further.

  Second, the inclination angle θ1 of the side wall 83B-S of the housing groove 83B is made smaller than the inclination angle θ2 of the side wall 84B-S of the raised portion 84B. As described above, when the inclination angle θ2 of the side wall 84B-S of the raised portion 84B is increased, the side wall 84B-S of the raised portion 84B is subjected to a load from the upper side (load from the raised portion 84B toward the housing groove 83B). On the other hand, the rigidity is increased. On the other hand, since the inclination angle θ1 of the side wall 83B-S of the housing groove 83B is small, the side wall 83B-S of the housing groove 83B has a small rigidity and is easily deformed with respect to the load from above.

  In this embodiment, the inclination angle θ1 of the side wall portion 83B-S of the receiving groove 83B is set to 30 °, and the inclination angle θ2 of the side wall portion 84B-S of the raised portion 84B is set to 60 °, and press working is performed. I try to get this angle. This angle can be set to an appropriate value by adjusting the angle between the groove portion of the lower mold and the convex portion of the upper mold.

  Therefore, in order to enhance the adhesion of the vacuum heat insulating material 16, the side wall portion 84B-S of the raised portion 84B is rigid with respect to the load applied to the raised portion 84B when the vacuum heat insulating material 16 is attached or when polyurethane foam is foamed. Since the side wall 83B-S of the housing groove 83B is small in rigidity and easily deformed, the housing groove 83B can be easily deformed without applying a large load.

  As described above, the vacuum heat insulating material 16 in which the slope of the side wall 83B-S of the accommodation groove 83B, the slope of the side wall 84B-S of the raised portion 84B, and the start point of both slopes is determined is used. By this, heat insulation performance can be ensured without reducing the layer of raw cotton, and further, the vicinity of the housing groove 83B can be easily deformed so that the vacuum heat material 16 is in close contact with the heat radiating pipe 80B and the inner wall surface of the outer box 15A. Can be transformed into

  For example, let us consider a case where polyurethane foam is injected and foamed from an injection hole on the back surface with the back surface of the heat insulation box facing upward. Foaming pressure acts on the raised portions 84B of the vacuum heat insulating material 16 when foaming the polyurethane foam.

  Due to the foaming pressure, the distance between the rising start point S of the side wall portion 84B-S and the slope portion of the side wall portion 83B-S of the receiving groove 83B is shorter than the other regions, so that deformation occurs from the thin portion as a starting point. Further, since the side wall 83B-S of the housing groove 83B is small in rigidity and easily deformed with respect to the side wall 84B-S of the raised portion 84B, the housing groove 83B can be easily deformed.

  By these mutual actions, the vicinity of the housing groove 83B of the vacuum heat insulating material 16 can be pressed against the heat radiating pipe 80B and the inner wall surface of the outer box 15A without requiring a large load to be deformed. As a result, the adhesion between the vacuum heat insulating material 16 and the heat radiation pipe 80B and the inner wall surface of the outer box 15A can be enhanced. Further, since a large load is not applied, damage to the vacuum heat insulating material 16 can be prevented.

  Although the above description is a case where the vacuum heat insulating material 16 is deformed when foaming the polyurethane foam, the vacuum heat insulating material 16 may be manually deformed when the vacuum heat insulating material 16 is fixed to the inner wall surface of the outer box 15A. Similar actions and effects can be obtained.

  In addition, if the deformability is further increased by using raw cotton having low rigidity, the adhesion can be further increased. This is advantageous when the shape of other peripheral parts including the heat radiating pipe is complicated and it is difficult to obtain adhesion.

  As described above, according to the present embodiment, heat insulation performance can be ensured without reducing the raw cotton layer, and the vicinity of the housing groove is easily deformed, so that the heat radiation pipe of the vacuum heat insulating material or the inner wall surface of the outer box can be obtained. It becomes possible to improve the adhesion.

  Furthermore, air can remain in the gap between the vacuum heat insulating material and the heat radiating pipe, and the polyurethane foam can be prevented from entering and the heat insulation performance from being lowered, and the urethane foam can penetrate and expand (expand). The displacement of the vacuum heat insulating material due to this can be suppressed.

  Note that this embodiment is more advantageous when the heat dissipating pipes are arranged in a complicated arrangement shape. In the case where it is difficult to form the housing groove that traces the arrangement shape of the heat radiating pipe in the vacuum heat insulating material, the conventional method forms the groove in a wide range including a portion where the heat radiating pipe is not installed. For this reason, the clearance gap which forms an accommodation groove becomes large in proportion to the length of piping, and it is possible that heat insulation performance deteriorates.

  On the other hand, in this embodiment, since the vicinity of the housing groove is easily deformed without applying a large load, it is possible to follow the arrangement shape of the heat radiating pipe and closely adhere to the heat radiating pipe and the inner wall surface of the outer box. it can. For this reason, while improving the heat dissipation from an outer box, the freedom degree of arrangement | positioning shape of the piping for thermal radiation can be made high, and high heat insulation performance can be acquired now.

  Furthermore, since the heat insulation performance can be improved when viewed as a refrigerator, a structure in which the cool air inside the refrigerator does not escape to the outside of the refrigerator can be obtained, and it can be expected that the power consumption is reduced.

  Next, a second embodiment of the present invention will be described with reference to FIGS. In the first embodiment, the heat radiating pipes 80 and 81 are covered with the vacuum heat insulating material 16, but in this embodiment, not the heat radiating pipes 80 and 81 but heat generating electric parts or electronic parts (hereinafter, summarized). The heat generating component is fixed to the inner wall surface of the outer box 15A to radiate heat. Of course, the vacuum heat insulating material 16 is attached so as to cover the heat generating component in order to improve the heat insulating performance. Further, the accommodating portion 88 and the raised portion 89 of the vacuum heat insulating material 16 that accommodates the heat-generating component are basically determined in the shape shown in FIG.

  6 to 8, the heat generating component 86 is fixed in contact with the inner wall surface of the outer box 15A so that heat can be transferred. The vacuum heat insulating material 16 is positioned around the heat generating component 86 so as to cover the heat generating component 86 from the entire periphery. Further, a gas vent hole 87 is communicated with the heat generating component 86, and this has a function of venting the accommodating portion 88 when filling the polyurethane foam. The outer side surface 16A and the inner side surface 16B of the vacuum heat insulating material 16 have functions similar to those of the receiving groove 83 and the raised portion 84 as described in the first embodiment, and the received portion 88 and the raised shape having a rectangular shape when viewed from above. A portion 89 is formed.

  The accommodating portion 88 includes an upper wall portion 88-U and side wall portions 88-S formed on the four sides of the upper wall portion 88-U. On the other hand, a raised portion 89 is formed so as to correspond to the region where the accommodating portion 88 is formed. The raised portion 89 includes an upper surface portion 89-U and side wall portions 89-S formed on the four sides of the upper surface portion 89-U. 5 shows the housing groove 83 along the heat radiating pipes 80 and 81, but in this embodiment, the housing groove 88 includes the heat generating component 86 because it is the heat generating component 86. Therefore, the raised portion 89 is present in the projection area where the accommodating portion 88 is projected onto the inner surface of the vacuum heat insulating material 16. Since the relationship between the accommodating portion 88 and the raised portion 89, and the operation and effect thereof are the same as those shown in FIG. 5, the description thereof is omitted here.

  FIG. 9 shows a modification of the above-described second embodiment. The shape of the accommodating portion 88 and the raised portion 89 of the second embodiment is rectangular when viewed from the top, whereas in this modification, the shape viewed from the top is circular. Alternatively, the difference is that an oval accommodating portion 90 and a raised portion 91 are formed.

  In FIG. 9, the outer side surface 16A and the inner side surface 16B of the vacuum heat insulating material 16 have the same functions as the receiving groove 83 and the raised portion 84 as described in the first embodiment, and the shape seen from the upper surface is circular, or An elliptical accommodating portion 90 and a raised portion 91 are formed. Since the configuration other than this is basically the same as that of the first embodiment and the second embodiment, the description of the operation and effect is omitted.

  As described above, according to the present invention, the housing groove for housing the heat radiating pipe is formed on one surface of the outer packaging material housing the laminated raw cotton, and the raised portion corresponding to the housing groove is formed on the other surface, The width of the receiving groove is formed larger than the width of the raised portion, and the slope of the side wall constituting the receiving groove is formed smaller than the slope of the side wall constituting the raised portion. According to this, since the layer of raw cotton is not reduced, heat insulation performance is ensured, and the vicinity of the housing groove is easily deformed, so that the heat insulation piping of the vacuum heat insulating material and the adhesion to the inner wall surface of the outer box are improved. Will be able to.

  Further, as in the second embodiment, similar effects can be obtained even when applied to a heat generating component instead of the heat radiating pipe.

  DESCRIPTION OF SYMBOLS 10 ... Refrigerator main body, 2 ... Cold storage room, 3 ... Ice making room, 4 ... Upper freezing room, 5 ... Lower freezing room, 6 ... Vegetable room, 12 ... Cooler storage room, 15 ... Heat insulation box, 15A ... Outer box, DESCRIPTION OF SYMBOLS 16 ... Vacuum heat insulating material, 19 ... Cooler, 18 ... Heat insulation partition wall, 20 ... Air blower, 80, 81 ... Radiation piping, 82 ... Heat insulation space, 83A, 83B ... Accommodating groove, 83B-U ... Upper wall part, 83 -S ... sidewall portion, 84 ... raised portion, 84B-U ... upper surface portion, 84-S ... sidewall portion, 85 ... raw cotton.

Claims (6)

In the vacuum heat insulating material obtained by laminating raw cotton with heat insulation properties and decompressing it after storing it in the outer packaging material,
A rising start point P where a housing groove for housing a heat radiation pipe is formed on one surface of the vacuum heat insulating material and a raised portion corresponding to the housing groove is formed on the other surface, and side walls on both sides of the housing groove rise. in width between said with width between the rise start point S where the side walls on either side of the raised portion rises is included, with respect to the slope of the sidewall constituting the ridges, the receiving groove vacuum heat insulating material, characterized in that so as to reduce a gradient of the side wall constituting. The vacuum heat insulating material according to claim 1,
A vacuum heat insulation characterized in that a rising start point S of the side wall formed in the raised portion is located in a region where the side wall formed in the housing groove is projected onto the other surface of the vacuum heat insulating material. Wood. The vacuum heat insulating material according to claim 2,
The vacuum heat insulating material, wherein an end point of the side wall formed in the raised portion is located in a region where the side wall formed in the housing groove is projected onto the other surface of the vacuum heat insulating material. In the heat insulating space between the outer box and the inner box forming the heat insulating box body, the heat radiating pipe is fixed in close contact with the inner wall surface of the outer box, and the vacuum heat insulating material is attached to the outer box so as to cover the heat radiating pipe In a refrigerator that is fixed to the inner wall surface and filled with polyurethane foam in the heat insulating space,
The vacuum heat insulating material is obtained by laminating raw cotton with heat insulating properties, storing the outer cotton in an outer packaging material, and then reducing the pressure, and further housing a heat radiation pipe on one surface of the vacuum heat insulating material. And a ridge corresponding to the accommodation groove is formed on the other surface, and the side walls on both sides of the accommodation groove are on both sides of the ridge within a width between rising start points P. with width is included between the rise start point S of the side wall rises, relative to the slope of the sidewall constituting the ridges, together with the slope to the reduced form of the side wall constituting the housing groove,
Refrigerator, characterized in that the yield capacity groove of the vacuum heat insulating material is filled with the polyurethane foam was fixed so as to cover the heat radiation pipe. The refrigerator according to claim 4,
The heat radiating pipe is fixed while meandering on both side surfaces of the outer box, and the housing groove of the vacuum heat insulating material corresponding to the heat radiating pipe on the front opening side of the outer box is a laminate of the raw cotton. The refrigerator is characterized in that the number of sheets is reduced and the raised portion is not formed. In the vacuum heat insulating material according to any one of claims 1 to 5, or a refrigerator,
A vacuum heat insulating material or a refrigerator, wherein an electric component or an electronic component that generates heat is housed in the housing groove of the vacuum heat insulating material instead of the heat radiating pipe.

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