JP2015064134A - Refrigerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a novel refrigerator capable of suppressing polyurethane foam from entering a storage groove formed by the vacuum insulation material and an inner wall surface of an outer case for storing a radiation piping element.SOLUTION: A storage groove storing a radiation piping element is formed in an end surface portion of a vacuum insulation material, and the end surface portion is fixedly attached to an inner wall surface of an outer case so as to surround the radiation piping element. Since the end surface portion of the vacuum insulation material is fixedly attached to the inner wall surface of the outer case so as to surround the radiation piping element, it is possible to suppress polyurethane foam from entering the storage groove storing the radiation piping element and to improve the heat insulation performance of the vacuum insulation material.

Description

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

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.

  Examples of the heat radiation pipe connected to such a condenser fixed to the inner wall surface of the outer box and covered with a vacuum heat insulating material are disclosed in Japanese Patent Application Laid-Open No. 2008-64323 (Patent Document 1) and Japanese Patent Application Laid-Open No. 2012-82954. The gazette (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, the heat radiating piping is arranged between the outer box and the inner box that constitute both side surfaces and the ceiling surface of the heat insulating box, and is in contact with the inner wall surface of the outer box. Since the outer box is made of a steel plate, heat is favorably radiated from the outer surface of the outer box to the outside air. That is, the heat radiating pipe is formed so as to meander in the vertical direction from the near side where the front opening of the heat insulating box is located to the far side, and is arranged so as to contact the inner wall surface of the outer box.

  Generally, the end face portion of the vacuum heat insulating material covering the heat radiation pipe located on the front opening portion side of the storage chamber of the heat insulation box is configured as shown in FIG. In FIG. 8, the vacuum heat insulating material 16 is disposed in the heat insulating space 82 formed by the outer box 15A and the inner box 15B constituting the heat insulating box, and the polyurethane foam is filled between the vacuum heat insulating material 16 and the inner box 15B. It is what is done. The heat radiating pipe 80 </ b> A on the front opening side of the heat insulating box is covered with the end face portion 16 </ b> C of the vacuum heat insulating material 16.

  And the method of forming the accommodation groove | channel of the piping 80A for heat radiation in the vacuum heat insulating material 16 can be performed as follows. For example, the vacuum heat insulating material 16 completed by being evacuated as disclosed in Patent Document 1 is pressed by an upper die and a lower die. That is, the upper mold is provided with a convex part that forms a housing groove for accommodating the heat radiation pipe, and the lower mold is provided with a groove part that forms a raised part so as to face the convex part. Therefore, by holding the vacuum heat insulating material 16 between the upper mold and the lower mold and pressing the vacuum insulating material 16, it is possible to obtain a housing groove and a raised portion having a desired shape. However, if the housing groove for accommodating the heat radiation pipe 80A on the front opening side and the raised portion corresponding to this are formed in the end face portion 16C of the vacuum heat insulating material 16, the space between the raised portion of the vacuum heat insulating material 16 and the inner box 15B is formed. There is a possibility that the gap between the two becomes shorter and adversely affects the fluidity of the polyurethane foam. This is because the inner box 15B is inclined toward the front opening side.

  Therefore, as can be seen from FIG. 8, the vacuum heat insulating material 16 is formed of, for example, three layers of raw cotton 85A, 85B, 85C, and the end face portion 16C is omitted from the raw cotton 85A and has a thickness from three layers to two layers. The housing groove 83A is formed by being shortened. And this raw cotton has the structure which heat-dissipates piping 80A in the housing groove 83A of the two-layer part, and insulates it with the vacuum heat insulating material 16 so that the heat | fever from the heat-radiating piping 80A may not penetrate | invade into a store | warehouse | chamber. That is, the end surface portion 16C of the vacuum heat insulating material 16 is not formed with a raised portion corresponding to the housing groove 83A for housing the heat radiation pipe 80A, and the end surface portion 16C of the vacuum heat insulating material 16 and the inner wall surface of the outer box 15A are in contact with each other. It was designed to be opened without doing so.

  For this reason, when the polyurethane foam is filled, the polyurethane foam penetrates between the end face portion 16C of the vacuum heat insulating material 16 and the inner wall surface of the outer box 15A from this open portion, and the vacuum heat insulating material 16 contacts the inner wall surface of the outer box 15A. A phenomenon occurs in which the heat dissipation efficiency is lowered due to the decrease in surface adhesion. Alternatively, by surrounding the heat radiation pipe 80A with polyurethane foam having a higher thermal conductivity than the vacuum heat insulating material 16, the heat from the heat radiation pipe 80A is transferred into the cabinet through the polyurethane foam. Occur. In any case, when polyurethane foam invades from this open part, it has an undesirable adverse effect on the heat insulating performance of the vacuum heat insulating material.

  An object of the present invention is to provide a novel refrigerator in which polyurethane foam does not enter the housing groove of the heat radiation pipe formed by the vacuum heat insulating material and the inner wall surface of the outer box from the end surface portion of the vacuum heat insulating material. is there.

  A feature of the present invention is that a housing groove for housing a heat radiation pipe is formed in an end surface portion of the vacuum heat insulating material, and the end surface portion is closely attached to and fixed to the inner wall surface of the outer box so as to surround the heat radiation pipe. .

  According to the present invention, the end face of the vacuum heat insulating material surrounds the heat radiating pipe so as to be in close contact with and fixed to the inner wall surface of the outer box. The heat insulating performance of the heat insulating material can be improved.

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 an expanded sectional view of the M section shown in FIG. It is an expanded sectional view of the N section shown in FIG. It is sectional drawing at the time of attaching the vacuum heat insulating material which becomes the 2nd Embodiment of this invention to piping for thermal radiation. It is sectional drawing at the time of attaching the conventional vacuum heat insulating material to piping for thermal radiation.

  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 refrigeration 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. To come.

  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 radiating pipes 80 provided on both side surfaces are arranged in parallel with a first heat radiating pipe 80A on the front opening side, a second heat radiating pipe 80B on the center, and a third heat radiating pipe 80C on the back side. They are arranged in the vertical direction, and these are formed by meandering and bending one heat radiating pipe 80.

  As shown in FIG. 3, the heat radiating pipe 80 (indicated by a thick broken line in FIG. 3) is between the outer box 15 </ b> A and the inner box that constitute both side surfaces and the ceiling surface of the heat insulating box 15, and 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 arranged between the outer box 15A and the inner box on the back surface of the heat insulation box 15 and in contact with the inner wall surface of the outer box 15A. ing. 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, a first embodiment of the present invention in the refrigerator configured as described above will be described with reference to FIGS. 4, 5, and 6. Here, FIG. 4 shows a cross section obtained by cutting off the front opening side of one side wall of the heat insulation 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 portion of the heat radiation pipe 80C is not shown because it has the same configuration as the heat radiation pipe 80B. 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. Details of the accommodation groove 83B and the raised portion 84B relating to the M portion in FIG. 4 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 to increase the size of the front opening side of the inner box 15B so that food can be taken out and stored easily. For this reason, since the front opening side of the heat insulation box 15 is provided with an inclination in the inner box 15B and has a small thickness, the housing groove 83A for housing the first heat radiation pipe 80A on the front opening side, and When the raised portion corresponding to this is formed from three layers of raw cotton 85A, 85B, 85C like the other containing groove 83B, raised portion 84B, containing groove 83C, raised portion 84C, the vacuum heat insulating material 16 and the inner box 15B This is because the gap between the two may be shortened and may adversely affect the fluidity of the polyurethane foam 86.

  Therefore, in this embodiment, in the region of the end face portion 16C of the vacuum heat insulating material 16, the first raw cotton 85A is omitted, and only the second raw cotton 85B and the third raw cotton 85C are used for the first heat radiation on the front opening side. The housing groove 83A for housing the piping 80A for use is formed, and the raised portion 84C for forming the groove housing groove 83A 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. Further, the end face portion 16C of the vacuum heat insulating material 16 is closely attached and fixed to the inner wall surface of the outer box 15A by an adhesive tape, hot melt or the like. The details of the accommodation groove 83A relating to the N portion in FIG. 4 will be described with reference to FIG.

  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. In addition, about the accommodating part 83A, since the raw cotton 85A is abbreviate | omitted and the accommodation groove | channel 83A is formed, the formation of the accommodation groove | channel by press work is not performed. However, only the housing groove 83A may be formed by pressing. In this case, a raised portion that may hinder fluidity is not formed.

  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. It is designed to be deformed so as to be closely attached to.

  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 closely attached to the inner wall surface of the heat radiating pipe 80B or 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.

  Next, the accommodating part 83A formed in the end surface part 16c of the vacuum heat insulating material 16 will be described in detail with reference to FIG. In FIG. 6, the heat radiating pipe 80A is fixed to the inner wall surface of the outer box 15A so as to be able to transfer heat. 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 80A. 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.

  In the vacuum heat insulating material 16, 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 cut shorter than the second and third raw cotton 85B and 85C. Therefore, the end surface portion 16C of the vacuum heat insulating material 16 forms the accommodating groove 83A in the two layers of raw cotton region portions.

  As described above, the thickness of the front opening side of the heat insulating box 15 is small. For this reason, the housing groove 83A for housing the first heat radiating pipe 80A on the front opening side and the raised portion 84A corresponding to this are replaced with the other housing groove 83B, the raised portion 84B, the housing groove 83C, and the raised portion 84C. Thus, if it forms from three layers of raw cotton 85A, 85B, 85C, the clearance gap between the vacuum heat insulating material 16 and the inner case 15B will become short, and there exists a possibility of having a bad influence on the fluidity | liquidity of the polyurethane foam 86. FIG.

  Therefore, in the present embodiment, in the region of the end face portion 16C of the vacuum heat insulating material 16, the raw cotton 85A is omitted, and the housing groove 83A for housing the first heat radiating pipe 80A on the front opening side by the raw cotton 85B and the raw cotton 85C is provided. The raised portion 84C for forming the groove accommodating groove 83A 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.

  Further, the end face portion 16C of the vacuum heat insulating material 16 is adhered and fixed to the inner wall surface of the outer box 15A by an adhesive tape, hot melt or the like. The end surface portion 16C is bent toward the outer box 15A with respect to the point X where the heat radiating pipe 80A is located, and the end surface portion 16C continues from the point X to the inclined portion 16D and the fixed portion 16E. Is formed. Therefore, the fluidity of the polyurethane foam can be further improved by increasing the distance between the inner box 15B, the inclined portion 16D, and the fixed portion 16E in the end surface portion 16c of the vacuum heat insulating material 16.

  Further, since the end face portion 16C of the vacuum heat insulating material 16 is closely attached and fixed by the fixing portion 16E, the polyurethane foam that has passed through the gap between the inner box 15B, the inclined portion 16D, and the fixing portion 16E is fixed by the fixing portion 16E. The flow into the accommodation groove 80A is prevented, and the space formed by the outer box 15A, the inner box 15B, and the end face portion 16C of the vacuum heat insulating material 16 can be uniformly filled with polyurethane foam.

  As a matter of course, the polyurethane foam does not flow into the accommodation groove 80A due to the presence of the fixing portion 16E. For this reason, polyurethane foam permeates between the end face portion 16C of the vacuum heat insulating material 16 and the inner wall surface of the outer box 15A, and the heat radiation is caused by lowering the adhesion between the contact surfaces of the vacuum heat insulating material 16 and the inner wall surface of the outer box 15A. There is no problem of generating a phenomenon that causes a decrease in efficiency. Similarly, by surrounding the heat radiating pipe 80A with polyurethane foam having higher thermal conductivity than the vacuum heat insulating material 16, the heat from the heat radiating pipe 80A is transferred to the interior through the polyurethane foam. It is a thing which does not produce.

  Here, the first raw cotton 85A is made of a raw material having a strong rigidity, and the second raw cotton 85B and the third raw cotton 85C are made of a raw material having a weak rigidity, so that the first raw cotton 85A is closely attached and fixed to the inner wall surface of the outer box 15A. The workability at the time is improved, and the end face portion 16c can be fixed to the inner wall surface of the outer box 15A along the shape of the heat radiating pipe 80A, so that the adhesion of the vacuum heat insulating material 16 can be improved.

  As described above, according to the present embodiment, the polyurethane foam penetrates into the housing portion of the heat radiating pipe by fixing the end face portion of the vacuum heat insulating material to the inner wall surface of the outer box so as to surround the heat radiating pipe. It can suppress and can improve the heat insulation performance of a vacuum heat insulating material.

  Moreover, by using together with the structure shown in FIG. 5, it becomes possible to improve the adhesiveness between the vacuum heat insulating material, the heat radiation pipe and the inner wall surface of the outer box. By adopting such a configuration, it can be expected that the overall heat insulating performance of the vacuum heat insulating material 16 is improved.

  Next, a second embodiment of the present invention will be described with reference to FIG. In the first embodiment, the end face portion 16C of the vacuum heat insulating material 16 has two layers, but in the present embodiment, a housing groove 83A is formed by forming a two-layer region and a three-layer region.

  In FIG. 7, in the vacuum heat insulating material 16, 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 cut shorter than the second and third raw cotton 85B and 85C. Therefore, the end surface portion 16C of the vacuum heat insulating material 16 forms the accommodating groove 83A in the two layers of raw cotton region portions.

  In addition, the fourth raw cotton 85D is laminated on the tip end side of the end face portion 16C of the vacuum heat insulating material 16, so that the end face portion 16C has the first raw cotton 85A, the second raw cotton 85B, the third raw cotton 85D. 3 layers of raw cotton 85C, 2 layers of second raw cotton 85B, 2 layers of 3rd raw cotton 85C, 3 layers of 2nd raw cotton 85B, 3rd raw cotton 85C, 4th raw cotton 85D As a result, the housing groove 83A is formed in a two-layer region. And the fixing | fixed part 16E consisting of the area | region of three layers by raw cotton 85B, 85C, 85D is closely_contact | adhered and fixed to the inner wall face of 15 A of outer boxes.

  The vacuum heat insulating material 16 having such a configuration can be manufactured by combining a region where raw cotton is laminated in three layers and a region where raw cotton is laminated in two layers along the shape of the heat radiation pipe 80.

  Also in this embodiment, in the region of the end face portion 16C of the vacuum heat insulating material 16, the first raw cotton 85A is omitted, and only the second raw cotton 85B and the third raw cotton 85C are used for the first heat radiation on the front opening side. An accommodation groove 83A for accommodating the pipe 80A is formed, and a raised portion for forming the groove accommodation groove 83A 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.

  Further, the fixing portion 16E composed of three layers of raw cotton 85B, 85C, 85D on the end face portion 16C of the vacuum heat insulating material 16 is closely attached and fixed to the inner wall surface of the outer box 15A by an adhesive tape, hot melt or the like. Therefore, the polyurethane foam that has passed through the gap between the inner box 15B and the vacuum heat insulating material 16 is prevented from flowing into the housing groove 80A by the fixing portion 16E, and the outer box 15A, the inner box 15B, and the vacuum heat insulating material 16 It becomes possible to uniformly fill the polyurethane foam into the space formed by the end face portion 16C.

  Since polyurethane foam does not flow into the accommodating groove 80A, the polyurethane foam enters between the end face portion 16C of the vacuum heat insulating material 16 and the inner wall surface of the outer box 15A, and the inner wall surface of the vacuum heat insulating material 16 and the outer box 15A. There is no problem that a phenomenon in which the heat dissipation efficiency is lowered due to the lowering of the adhesiveness of the contact surface. Similarly, by surrounding the heat radiating pipe 80A with polyurethane foam having higher thermal conductivity than the vacuum heat insulating material 16, the heat from the heat radiating pipe 80A is transferred to the interior through the polyurethane foam. It is a thing which does not produce.

  In the embodiment described above, an example in which the heat radiation pipe is covered with the vacuum heat insulating material has been described. It is something that can be done.

  As described above, according to the present invention, the housing groove for housing the heat radiating pipe is formed in the end face portion of the vacuum heat insulating material, and the end face portion is closely fixed to the inner wall surface of the outer box so as to surround the heat radiating pipe. Because it is configured, the end face of the vacuum heat insulating material surrounds the heat radiating pipe and is firmly fixed to the inner wall surface of the outer box, so that the polyurethane foam can be prevented from entering the housing part of the heat radiating pipe, and the vacuum heat insulating material It becomes possible to improve the heat insulation performance.

  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, 16C ... End surface part, 16D ... Inclined part, 16E ... Fixed part, 19 ... Cooling device, 18 ... Heat insulation partition wall, 20 ... Fan, 80, 81 ... Piping for heat radiation, 82 ... Heat insulation space, 83A 83B ... accommodating groove, 83B-U ... upper wall portion, 83-S ... side wall portion, 84 ... raised portion, 84B-U ... upper surface portion, 84-S ... side wall portion, 85A, 85B, 85C, 85D ... raw cotton.

Claims (5)

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 having heat insulation properties, storing the raw cotton in an outer packaging material, and reducing the pressure, and providing a heat radiating pipe on one surface of the end surface portion of the vacuum heat insulating material. The housing groove is formed, and the end surface portion of the vacuum heat insulating material is closely fixed to the inner wall surface of the outer box so as to surround the heat radiating pipe by the end surface portion of the vacuum heat insulating material. A refrigerator filled with the polyurethane foam. The refrigerator according to claim 1,
The heat radiating pipe is fixed to both side surfaces of the outer box while meandering, and the housing groove in the end surface corresponding to the heat radiating pipe on the front opening side of the outer box is the number of stacked raw cottons. Refrigerator characterized by being formed by being reduced. The refrigerator according to claim 1,
The heat radiating pipe is fixed to both side surfaces of the outer box while meandering, and the housing groove in the end surface corresponding to the heat radiating pipe on the front opening side of the outer box is the number of stacked raw cottons. The refrigerator is characterized in that the end surface portion is provided with an inclined portion in which the distance between the inner box and the end surface portion is increased. The refrigerator according to claim 1,
The heat radiating pipe is fixed to both side surfaces of the outer box while meandering, and the housing groove in the end surface corresponding to the heat radiating pipe on the front opening side of the outer box is the number of stacked raw cottons. A refrigerator characterized in that it is formed by a region having a small number of laminated raw cottons formed between regions having a large amount. 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. Forming a receiving groove and a raised portion corresponding to the receiving groove on the other surface, and forming the width of the receiving groove larger than the width of the raised portion, and against the slope of the side wall constituting the raised portion In addition, the side wall constituting the housing groove is formed with a small gradient, and the housing groove for housing the heat radiation pipe is formed on one surface of the end surface portion of the vacuum heat insulating material, and the end surface portion of the vacuum heat insulating material is formed. The refrigerator is characterized in that the end surface portion of the vacuum heat insulating material is closely fixed to the inner wall surface of the outer box so as to surround the heat radiating pipe, and the polyurethane foam is filled in this state.

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