JP2019082325A - Heat insulation cabinet - Google Patents

Abstract

To provide a heat insulation cabinet capable of dispensing with bending of a vacuum heat insulation panel in a bent portion of a peripheral wall section, ensuring high reliability of heat insulation performance, and avoiding a cost increase.SOLUTION: A heat insulation cabinet (1) has a vacuum insulation panel (10) bonded to an inner skin (9) of a wall part (1b) adjacent to a back wall (1e). The vacuum insulation panel (10) is disposed such that an inwardly extending part (10a) is not in contact with the inner skin (9) and the outer skin (8). The volume of a space between the inner skin (9) and the inwardly extending part (10a) filled with a foam heat insulating material (7) whose flow is split by the inwardly extending part (10a) is smaller than the volume of a space between the outer skin (8) and the vacuum insulation panel (10) filled with the foam heat insulating material (7).SELECTED DRAWING: Figure 1

Description

  Embodiments of the present invention relate to thermal insulation cabinets.

  In recent years, for example, household refrigerators are tending to increase in capacity, and in order to realize this while suppressing an increase in external dimensions, the thickness of the peripheral wall of the heat insulation cabinet has been reduced. In this case, even with a peripheral wall with a small thickness, it is necessary to secure sufficient insulation performance in the cabinet, and for that reason, in addition to filling the foam insulation material, the vacuum insulation panel is used in the peripheral wall of the cabinet In some cases, the peripheral wall of the cabinet is configured only by filling a vacuum heat insulation panel (see, for example, Patent Documents 1 and 2).

  The vacuum insulation panel is made of, for example, glass wool which is a cotton-like thin glass fiber as a mat and used as a core material, and the core material is inserted into a gas barrier container made of aluminum foil and a synthetic resin laminated film, It is a panel that holds the inside of the container in a vacuum depressurized state by evacuating the air and closing the opening, and has thin and low thermal conductivity (high thermal insulation), so using it, it is thermally insulated High insulation performance can be obtained while reducing the thickness of the peripheral wall of the cabinet.

Patent No. 2728318 gazette Japanese Patent Laid-Open No. 6-147744

  The peripheral wall of the above-mentioned heat insulation cabinet has a bending part, for example, the part which two wall parts contact, such as a part which a ceiling wall part and a back wall part contact, is a bending part. If the vacuum heat insulation panel is disposed at this bent portion, it becomes necessary to bend the vacuum heat insulation panel, and the gas barrier container of the vacuum heat insulation panel is broken by the bending, and the reliability of the heat insulation performance is reduced. In addition, the bending of the vacuum heat insulation panel increases the number of man-hours, resulting in an increase in cost.

  Therefore, it is possible to provide a heat insulation cabinet which can obtain high reliability of heat insulation performance and can avoid cost increase by eliminating the need for bending the vacuum heat insulation panel at the bent portion of the peripheral wall portion.

  The heat insulation cabinet according to the present embodiment is a heat insulation cabinet in which a vacuum heat insulation panel is disposed on a peripheral wall to insulate heat, and a part of the peripheral wall is a back wall and is a peripheral wall In the wall adjacent to the back wall, a vacuum heat insulation panel is attached to the endothelium, and one end of the vacuum heat insulation panel is extended into a bent portion between the back wall and the back wall to form an extended portion The volume of the space between the spread portion and the endothelium, which is disposed in a state where the spread portion is not in contact with the endothelium and the shell, and is filled with the foamed insulation material diverted by the spread portion; It is characterized in that the volume of the space between the vacuum insulation panel filled with the foam insulation and the outer cover is increased.

Longitudinal side view of the whole heat insulation cabinet which shows 1st Embodiment Enlarged view of part II of Figure 1 Enlarged view of part III of FIG. 1 Perspective view of the whole insulation cabinet An exploded perspective view of the wall unit of the whole heat insulation cabinet 2 equivalent figure which shows 2nd Embodiment

Hereinafter, the first embodiment will be described with reference to FIGS. 1 to 5.
First, FIG. 4 schematically shows a heat insulation cabinet, particularly the heat insulation cabinet 1 of a refrigerator. In this case, as shown in FIG. 5, the heat insulation cabinet 1 has a peripheral wall, that is, a surrounding wall, a ceiling wall. A part 1a, a bottom wall 1b, a left side wall 1c, a right side wall 1d, and a back wall 1e are separately formed and joined, and the whole is shown in FIG. As shown, it has a substantially rectangular box-like shape having an opening 2 on the front surface, and has a storage chamber 3 connected to the opening on the inside. In the refrigerator, the storage room 3 is a cold storage room, a vegetable room, an ice making room, a freezing room and the like, and is divided into each room.

  Basically, as shown in FIG. 1, the ceiling wall portion 1 a has a vacuum heat insulation panel 6 attached to the outer surface of the endothelium 5 of the outer skin 4 and the endothelium 5 of the roof wall 1 a. It is disposed between the endothelium 5 and the shell 4 and is configured by filling the foam insulating material 7 in the remaining outer space between the endothelium 5 and the shell 4.

The bottom wall portion 1b also has a vacuum insulation panel 10 attached to the outer surface of the endothelium 9 of the outer skin 8 and the endothelium 9, and the vacuum insulation panel 10 is disposed between the endothelium 9 and the outer skin 8 In addition to the configuration, the remaining outside space between the endothelium 9 and the outer shell 8 is filled with the foam insulation material 7.
That is, the ceiling wall portion 1a and the bottom wall portion 1b constitute the heat insulating material to be filled as a vacuum heat insulation panel only.

On the other hand, the back wall 1e is configured by only arranging the vacuum heat insulation panel 13 between the outer skin 11 and the endothelium 12 of the back wall 1e. That is, the back wall portion 1 e is configured such that the heat insulating material to be filled is only the vacuum heat insulating panel.
Although not shown, the left side wall 1c has the same configuration as the back wall 1e, and the right side wall 1d also has the same configuration as the back wall 1e.

  Further, the outer shells (4, 8, 11) of the wall portions 1a to 1e correspond to the outer plates, for example, are made of metal such as steel plate, and the endothelium (5, 9, 12) corresponding to the inner plates is made of plastic, for example It is. Further, the respective endothelium (5, 9) of the ceiling wall 1a, the bottom wall 1b, the left side wall 1c, and the right side wall 1d among them are molded articles, and the endothelium 12 of the back wall 1e is a sheet. .

  The vacuum heat insulation panel (6, 10, 13) is made of the above-mentioned glass wool which is a cotton-like thin glass fiber, for example, as a mat material to make a core material, and this core material is made of a laminated film of aluminum foil and a synthetic resin. It is a panel which is held in a vacuum depressurized state by inserting the bag into a gas barrier container and evacuating the inside to close the opening, and the foam heat insulating material 7 is, for example, polyurethane foam.

Based on the above configuration, the wall portions 1a to 1e are joined at their respective end portions to compose the heat insulation cabinet 1. As a result, bent portions are formed in portions where the wall portions 1a to 1e are in contact with each other.
Here, FIG. 2 shows in detail the bending portion 14 formed in the portion where the ceiling wall portion 1a and the back wall portion 1e are in contact with each other, and a vacuum heat insulation panel is basically arranged in the bending portion 14 It is not provided and is filled with the foamed heat insulating material 7. That is, this bent portion 14 configures the heat insulating material to be filled as the foamed heat insulating material 7 only, and the thicknesses t ₁ and t ₂ are the thickness t ₃ of the ceiling wall 1 a and the thickness of the back wall 1 e as representatively shown in comparison with t ₄ being is made larger than the other wall portion 1 a to 1 e.

Also, in this case, the ceiling wall portion 1a is lower in the rear by one step, and the back wall portion 1e is lower in height than the ceiling wall portion 1a, and the ends thereof are joined to form the bent portion 14 upward and backward. The recess 15 is formed to open to the
The reference numeral 16 denotes an inlet for injection of foam insulation, and the inlet 16 is formed in the shell 4 of the upper portion of the bent portion 14 (upper portion of the front surface of the recess 15) corresponding to the rear of the ceiling wall 1a. The foam insulation 7 is filled from the bending portion 14 to the ceiling wall 1 a by injecting the foam insulation 7 from the injection head H of the injection machine as shown by the arrow A from here.

On the other hand, 17 indicates a flow straightening member, and the flow straightening member 17 is provided on the endothelium 5 at a position facing the injection port 16, and the flow of the foamed heat insulating material 7 injected from the injection port 16 is by proceeding divided against the rectifying member 17, the oriented as indicated by the arrow a _1, is intended to be oriented as indicated by the arrow a _2, thereby vacuum foamed insulating material 7 is injected in the ceiling wall portion 1a While being between the heat insulation panel 6 and the shell 4, it is in the bending portion 14 and is filled efficiently and completely.
Further, in this case, in the ceiling wall portion 1a, the vacuum insulation panels 6 are arranged to bear in a range L ₁ which is not NobeIri the bent portion 14.

  Furthermore, a protrusion 18 is formed at the end of the endothelium 5 of the bending portion 14. The projecting portion 18 obliquely extends rearward and downward from the end portion of the endothelium 5 of the bending portion 14 and further extends the distal end portion 18 a upward, and a wall connecting the projecting portion 18 to the bending portion 14 It is attached to the back wall 1e which is a section. In detail, the distal end portion 18a is in surface contact with the endothelium 12 of the back wall portion 1e via a thin seal member (not shown), and this portion is fastened with a fastening part (not shown) such as a screw.

  Incidentally, the connection between the outer skin 4 of the bending portion 14 and the outer skin 11 of the back wall portion 1e is the same thin seal as the end bending portion 11a of the outer skin 11 of the back wall portion 1e at the end 4a of the outer skin 4 of the bending portion 14 It is carried out by overlapping through a member (not shown) and fastening this portion with a fastening part (not shown) such as a screw.

  Further, a suction pipe 19 of the refrigeration cycle is internally installed in the bending portion 14 in a serpentine manner, for example. The suction pipe 19 connects an evaporator (evaporator and cooler) of the refrigeration cycle and a compressor (compressor) 23 described next. Note that, in FIG. 1, a connector 20 used for joining the left side wall 1c, the ceiling wall 1a (the bending portion 14), the bottom wall 1b (the bending portion 24 described later), and the back wall 1e. 21 and 22 are shown, each extending along the entire length of the joint portion, and the other part of the suction pipe 19 inside the connector 22 provided for joining the left side wall portion 1c and the back wall portion 1e thereof. Are provided.

  In addition, a connector similar to them also exists in the right side wall 1d, and a conductive wire is disposed in the inside of the connector provided for joining the right side wall 1d and the back wall 1e thereof. There is. The conductive wire connects a control device (not shown) for controlling the overall operation of the refrigerator and an electric component such as a cooling fan driven by receiving a signal from the control device.

  The compressor 23 of the refrigeration cycle is placed and disposed in the recess 15. Specifically, the compressor 23 is disposed such that its center 23 o is located forward of the center 15 o of the recess 15, and the protrusion 18 formed a moment by this on the end of the endothelium 5 of the bend 14. The rear wall portion 1e, which is a wall portion connected to the bending portion 14, is received through the above.

On the other hand, FIG. 3 shows in detail the bent portion 24 formed in the portion where the bottom wall portion 1b and the back wall portion 1e are in contact with each other, and a vacuum heat insulation panel is basically disposed also in this bent portion 24. Not, it is filled with foam insulation 7. That is, this bent portion 24 also constitutes the heat insulating material to be filled as the foamed heat insulating material 7 only, and the thicknesses t ₅ and t ₆ are the thickness t ₇ of the bottom wall portion 1 b and the thickness of the back wall portion 1 e as representatively shown in comparison with t ₄ being is made larger than the other wall portion 1 a to 1 e.

Further, in this case, the bottom wall portion 1b has the rear end portion thereof raised one step, and the back wall portion 1e has the lower end height higher than that of the bottom wall portion 1b, and these end portions are joined to each other. The recess 25 is formed to open downward and backward. The recess 25 is smaller than the recess 15 of the bent portion 14.
The reference numeral 26 denotes an inlet for injecting the foam insulation, and the inlet 26 is formed in the outer skin 8 of the lower portion (the front portion of the recess 25) of the bent portion 24 corresponding to the rear portion of the bottom wall portion 1b. The foam insulation 7 is filled from the bent portion 24 to the bottom wall 1 b by injecting the foam insulation 7 from the injection head H of the injection machine as shown by the arrow B from here.

In contrast, in the bottom wall 1b is a vacuum insulation panel 10, a length dimension L ₂ which NobeIri the bent portion 24 has disposed, that extends into dimensions are L _3. Further, a portion 10a of the vacuum heat insulation panel 10 extending into the bent portion 24 is opposed to the above-described injection port 26, whereby the flow of the foamed heat insulating material 7 injected from the injection port 26 extends. by proceeding divided against the portion 10a, along with directed as indicated by arrows B _1, is intended to be oriented as indicated by the arrow B _2, thereby a foamed insulating material 7 injected vacuum insulation of the bottom wall 1b While being between the panel 10 and the shell 8 and between the extended portion 10a in the bend 14 and the endothelium 9, they are filled efficiently and completely. Therefore, the portion 10 a of the vacuum heat insulation panel 10 extending into the bending portion 24 functions as the same flow straightening member as the flow straightening member 17.
The endothelium 9 of the bottom wall portion 1 b has a plurality of steps in the bending portion 24.

  A protrusion 27 is formed at the end of the endothelium 9 of the bent portion 24. The projecting portion 27 obliquely extends rearward and upward from the end portion of the endothelium 9 of the bending portion 24 and further extends the tip end portion 27 a downward, and a wall connecting the projecting portion 27 to the bending portion 24 It is attached to the back wall 1e which is a section. In detail, similarly to the protrusion 18 of the bent portion 14, the tip end 27a is brought into surface contact with the endothelium 12 of the back wall 1e through a thin seal member (not shown), and this portion is fastened with a screw or the like It is fastened by parts (not shown).

  The connection between the outer skin 8 of the bending portion 24 and the outer skin 11 of the back wall portion 1 e is the same as the outer skin 4 of the bending portion 14, the outer skin 11 of the back wall portion 1 e at the end 8 a of the outer skin 8 of the bending portion 24. The end portion bent portion 11b is similarly stacked via a thin seal member (not shown), and this portion is fastened with a fastening part such as a screw (not shown).

  As mentioned above, the heat insulation cabinet 1 of this embodiment arrange | positions and heat-insulates a vacuum heat insulation panel (6, 10, 13) in surrounding wall part 1a-1e, and is the said wall part in itself. The bent portions 14 and 24 of 1 a to 1 e are filled with the foamed heat insulating material 7. This eliminates the need to bend and arrange the vacuum heat insulation panel at the bent portions 14 and 24 and eliminates the problem of breakage of the vacuum heat insulation panel due to the bending, thereby obtaining high reliability of the heat insulation performance by the vacuum heat insulation panel. Can. Further, since the number of man-hours due to the bending of the vacuum heat insulation panel is not increased, it is possible to avoid the cost increase.

  At the same time, in the heat insulating cabinet 1 of the present embodiment, the bending portion 14 has the inlet 16 for injecting the foamed heat insulating material 7, and the flow of the foamed heat insulating material 7 is directed to the position facing the inlet 16. A vacuum insulation as a flow straightening member which has a flow straightening member 17 and has an inlet 26 for injecting the foamed heat insulating material 7 in the bending portion 24 and directs the flow of the foamed heat insulating material 7 at a position facing the inlet 26 An extended portion 10 a of the material 10 is provided. Among them, by the former, the foamed heat insulating material 7 is brought into the space between the vacuum heat insulating panel 6 of the ceiling wall 1 a and the outer skin 4 and brought into the bent portion 14 to be filled efficiently and completely. it can. On the other hand, the latter allows the foam insulation 7 to be brought between the vacuum insulation panel 10 of the bottom wall 1b and the shell 8, and also between the extended portion 10a in the bend 14 and the endothelium 9, It can be filled efficiently and completely.

Further, the bent portion 14 of the heat insulating cabinet 1 of the present embodiment is disposed in a range L ₁ without NobeIri vacuum insulation panel 6 to the bent portion 14. As a result, the vacuum heat insulating panel 6 can be prevented from blocking the flow of the foam heat insulating material 7 injected into the bending portion 14, and the foam heat insulating material 7 can be used as the vacuum heat insulating panel 6 and the skin 4 of the ceiling wall portion 1 a. In the meantime, the bending portion 14 can be efficiently and completely filled.

  On the other hand, in the bending part 24 of the heat insulation cabinet 1 of this embodiment, it is made to extend to the vacuum heat insulation panel 10 bending part 24, and is arrange | positioned. Thereby, as described above, the extended portion 10a of the vacuum heat insulation panel 10 can be functioned as a flow straightening member to direct the flow of the foam heat insulating material 7 injected from the injection port 26. And there is no need for cost increase. Also, in this case, a recessed corner portion 28 (see FIG. 3) is formed between the extended portion 10a of the vacuum heat insulation panel 10 and the endothelium 9 of the bottom wall 1b. It can be divided without excess at the extended portion 10a of the panel 10 and filled.

  Furthermore, in the heat insulation cabinet 1 of the present embodiment, the projecting portions 18 and 27 are formed on the end portions of the endothelium 5 and 9 of the bending portions 14 and 24, respectively. It is attached to the back wall part 1e which is a wall part connected to. As a result, the bending portions 14 and 24 can be supported by the projecting portions 18 and 27 so that they can be strongly joined to the back wall 1 e. Moreover, in this case, the projection is also used to hold the connection of the adjacent wall portions such as the ceiling wall portion 1a and the back wall portion 1e and the bottom wall portion 1b and the back wall portion 1e at a predetermined angle (in this case, right angle) 18 and 27 function, that is, the protrusions 18 and 27 also function as a means for holding the connection of adjacent wall portions at a predetermined angle (in this case, right angle).

  In addition, in the heat insulation cabinet 1 of the present embodiment, the endothelium 5, 9 of the bent portions 14, 24 is a molded product, while the endothelium of the back wall portion 1e which is a wall portion connected to the bent portions 14, 24. It has 12 sheets. As a result, molded articles can be easily produced, and sheets are inexpensive, so that cost increase can be further avoided.

Moreover, in the heat insulation cabinet 1 of this embodiment, the bending parts 14 and 24 are made thicker than the other wall parts 1a-1e. Thereby, the strength of the bending portions 14 and 24 can be secured high.
In the heat insulation cabinet 1 of the present embodiment, a suction pipe 19 for the refrigeration cycle is further provided in the bending portion 14. As described above, the suction pipe 19 of the refrigeration cycle connects the evaporator and the compressor 23 of the refrigeration cycle, and a low temperature refrigerant flows. By internally installing the suction pipe 19 through which the low temperature refrigerant flows, in the bent portion 14 in which the foamed heat insulating material 7 is filled, the problem of the dew on the surface of the suction pipe 19 can be eliminated. Further, since the bent portion 14 can be used as an internal place for the suction pipe 19 and there is no need to secure another place, thickening of other places can be avoided.

  Furthermore, in the heat insulation cabinet 1 of the present embodiment, the concave portion 15 exists in the bending portion 14, and the compressor 23 of the refrigeration cycle is positioned in the concave portion 15 such that the center 23 o thereof is located forward of the center 15 o of the concave portion 15. The back wall portion 1e, which is a wall portion connected to the bending portion 14, is received by the moment by the protruding portion 18 formed at the end of the endothelium 5 of the bending portion 14. Thus, the bending portion 14 can be kept robust against the moment due to the arrangement of the compressor 23.

6 shows the second embodiment, and the same parts as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted, and only different parts will be described.
In this embodiment, the compressor 23 of the refrigeration cycle is disposed in the recess 15 of the bending portion 14 such that the center 23 o is positioned rearward of the center 15 o of the recess 15. It is the same as that of 1st Embodiment to make surface contact and attach the protrusion part 18 formed to in the back wall part 1e which is a wall part connected with the bending part 14 by the front-end | tip part 18a. As a result, the back wall portion 1 e receives the load due to the weight of the compressor 23 through the projecting portion 18 formed at the end of the endothelium 5 of the bending portion 14, whereby the bending portion 14 can be kept robust.

The present invention is not limited to the embodiment described above and shown in the drawings. For example, a thin vacuum insulation panel which can be bent without breaking and which is inexpensive and which is inexpensive is disposed in the bending portion 14 It is good.
The left side wall 1c, the right side wall 1d, and the back wall 1e are configured such that the heat insulating material to be filled is a vacuum panel and a foam heat insulating material, and the ceiling wall 1a and the bottom wall 1b are heat insulating materials to be filled. It is good also as composition which makes only a vacuum heat insulation panel. Furthermore, it is good to give the same composition as bent part 24 or bent part 14 of the above-mentioned embodiment to a bent part which arises between left side wall part 1c and right side wall part 1d, and back wall part 1e by them.

In the embodiments, the following inventions are described.
The vacuum insulation panel provided in the bottom wall part is characterized in that a portion extending into a bending portion is opposed to the inlet.

  Besides, while several embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and the gist of the invention, and are included in the invention described in the claims and the equivalent scope thereof.

In the drawings, 1 is a heat insulation cabinet, 1a is a ceiling wall, 1b is a bottom wall, 1c is a left side wall, 1d is a right side wall, 1e is a back wall, 5 is an endothelium, 6 is a vacuum insulation panel, 7 is Foam insulation material, 9 is endothelium, 10 is vacuum insulation panel, 12 is endothelium, 13 is vacuum insulation panel, 14 is bending portion, 15 is recess, 15 is recess center, 16 is inlet, 17 is rectifying member, 18 Is a protrusion, 19 is a suction pipe, 23 is a compressor, 23o is the center of the compressor, 24 is a bend, 26 is an inlet, 27 is a protrusion, L ₁ is an arrangement range of a vacuum insulation panel, L ₂ is a vacuum insulation Panel dimensions, t ₁ and t ₂ are the thickness of the bend, t ₃ is the thickness of the ceiling wall, t ₄ is the thickness of the back wall, t ₅ and t ₆ is the thickness of the bend, t ₇ Indicates the thickness of the bottom wall.

Claims (1)

In a thermal insulation cabinet in which a vacuum thermal insulation panel is disposed on the surrounding wall for thermal insulation,
A part of the surrounding wall is a back wall,
A vacuum insulation panel is attached to the endothelium of the surrounding wall, which is adjacent to the back wall,
The vacuum insulation panel is disposed such that one end thereof is extended into a bent portion between the inner wall and the back wall to form an extended portion, and the extended portion is not in contact with the endothelium and the shell. ,
The space between the vacuum insulation panel filled with the foam insulation and the shell, rather than the volume of the space between the expansion part filled with the foam insulation separated by the insertion part and the endothelium Thermal insulation cabinet characterized by the increased volume of the space.

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