JP2013119998A - Heat insulation cabinet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat insulation cabinet capable of obtaining high reliability of heat insulation performance and avoiding a cost increase by making the folding of a vacuum heat insulation panel at a bent part of a peripheral wall unnecessary.SOLUTION: In a heat insulation cabinet 1 insulated by arranging vacuum heat insulating panels (6, 10, 13) on ambient walls (1a, 1b, 1e), foam insulation 7 is filled into the bent parts 14, 24 on the walls (1a, 1b, 1e). Accordingly, it becomes unnecessary to arrange the vacuum heat insulating panels (6, 10) while folding the vacuum heat insulating panels (6, 10) on the bent parts 14, 24 and the problem of breakage of the vacuum heat insulating panels (6, 10) due to the folding is dissolved and, therefore, the high reliability of heat insulation performance by virtue of the vacuum heat insulating panels (6, 10) can be obtained. Further, man-hour due to the folding of the vacuum heat insulating panels (6, 10) does not increase, and thereby, the cost increase can be avoided.

Description

  Embodiments of the present invention relate to an insulated cabinet.

  In recent years, for example, household refrigerators tend to have a large capacity, and in order to achieve 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, it is necessary to ensure that the cabinet has sufficient heat insulation performance even with a small peripheral wall. For this reason, in addition to filling the peripheral wall of the cabinet with foam insulation, vacuum insulation panels are used. In addition, there is a cabinet in which the peripheral wall of the cabinet is configured only by filling a vacuum heat insulating panel (see, for example, Patent Documents 1 and 2).

  The vacuum insulation panel is made of, for example, glass wool, which is a thin fiberglass cotton material, matted to form a core material. The core material is inserted into a gas barrier container made of aluminum foil and a synthetic resin laminate film, and the interior is This is a panel that keeps the inside of the container in a vacuum-reduced state by evacuating and closing the opening, and it is thin and has low thermal conductivity (high thermal insulation). High thermal insulation performance can be obtained while reducing the thickness of the peripheral wall of the cabinet.

Japanese Patent No. 2728318 JP-A-6-147744

  The peripheral wall of the above-described heat insulation cabinet has a bent portion. For example, a portion where two wall portions are in contact, such as a portion where the ceiling wall portion and the back wall portion are in contact, is a bent portion. When the vacuum heat insulation panel is disposed at the bent portion, it is necessary to bend the vacuum heat insulation panel, and the gas barrier container of the vacuum heat insulation panel is damaged by the bending, and the reliability of the heat insulation performance is lowered. In addition, the bending of the vacuum heat insulating panel increases the number of steps and causes an increase in cost.

  Accordingly, there is provided a heat insulation cabinet that eliminates the need for bending the vacuum heat insulation panel at the bent portion of the peripheral wall portion, provides high heat insulation performance reliability, and avoids cost increase.

  The heat-insulating cabinet of the present embodiment is configured by insulating a foam heat-insulating material in a bent part of the wall part in a heat-insulating cabinet in which a vacuum heat-insulating panel is disposed on a surrounding wall part to insulate. It is characterized by that.

The longitudinal side view of the whole heat insulation cabinet which shows 1st Embodiment Enlarged view of part II in Fig. 1 Enlarged view of part III in Figure 1 Perspective view of the whole insulated cabinet The exploded perspective view of the wall unit of the whole heat insulation cabinet FIG. 2 equivalent view showing the second embodiment

The first embodiment will be described below with reference to FIGS. 1 to 5.
First, FIG. 4 schematically shows a heat insulating cabinet, particularly a heat insulating cabinet 1 of a refrigerator. In this case, as shown in FIG. The part 1a, the bottom wall part 1b, the left side wall part 1c, the right side wall part 1d, and the back wall part 1e are separately formed and are formed by joining them. As shown, a rectangular parallelepiped box having an opening 2 on the front surface is formed, and a storage chamber 3 connected to the opening is provided inside. In the refrigerator, the storage room 3 is a refrigerator room, a vegetable room, an ice making room, a freezing room, or the like, and is partitioned by each room.

  As shown in FIG. 1, the ceiling wall portion 1a basically has a vacuum heat insulation panel 6 attached to the outer surface of the inner skin 5 of the outer skin 4 and the inner skin 5, and the vacuum heat insulation panel 6 is attached to the outer wall 4a. In addition to being disposed between the inner skin 5 and the outer skin 4, a foam heat insulating material 7 is filled in the remaining outer space between the inner skin 5 and the outer skin 4.

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

On the other hand, the back wall portion 1e is configured only by disposing the vacuum heat insulating panel 13 between the outer skin 11 and the inner skin 12. That is, the back wall portion 1e is configured with only a vacuum heat insulating panel as a heat insulating material to be filled.
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 skins (4, 8, 11) corresponding to the outer plates of the walls 1a to 1e are made of metal such as steel plates, and the inner skins (5, 9, 12) corresponding to the inner plates are made of plastic, for example. It is. Furthermore, the inner walls (5, 9) of the ceiling wall 1a, the bottom wall 1b, the left wall 1c, and the right wall 1d are molded articles, and the inner skin 12 of the back wall 1e is a sheet. .

  The vacuum heat insulation panels (6, 10, 13) are made of, for example, glass wool, which is a thin glass fiber cotton-like material, as a core material, and the core material is made of a laminated film of aluminum foil and synthetic resin. The panel is inserted into a sealed gas barrier container, and the inside is evacuated to close the opening, thereby holding the inside of the container in a vacuum-depressurized state. The foam insulation 7 is, for example, polyurethane foam.

Based on the above configuration, the heat insulating cabinet 1 is composed by joining the wall portions 1a to 1e at their respective end portions. As a result, bent portions are formed at portions where the wall portions 1a to 1e are in contact with each other.
Here, FIG. 2 shows in detail the bent 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 insulating panel is basically arranged in the bent portion 14. It is not provided and is filled with the foam heat insulating material 7. That is, the bent portion 14 is configured by using only the foam heat insulating material 7 as the heat insulating material to be filled, and the thicknesses t ₁ and t ₂ are the thickness t ₃ of the ceiling wall portion 1a and the thickness of the back wall portion 1e. As representatively shown in comparison with the length t ₄ , it is made larger than the other wall portions 1a to 1e.

Also, in this case, the ceiling wall 1a is lower by one step at the rear, and the back wall 1e is lower than the ceiling wall 1a, and the ends thereof are joined to the bent portion 14 so that the upper and rear A recess 15 is formed to be open.
Reference numeral 16 denotes an injection port for injecting foam heat insulating material, and this injection port 16 is formed in the outer skin 4 on the upper part of the bent part 14 (upper part of the front part of the recessed part 15) corresponding to the rear part of the ceiling wall part 1a. Then, the foam heat insulating material 7 is filled from the bending portion 14 to the ceiling wall portion 1a by injecting the foam heat insulating material 7 from the injection head H of the injector as indicated by the arrow A from here.

On the other hand, reference numeral 17 denotes a rectifying member. The rectifying member 17 is provided on the inner skin 5 at a position facing the injection port 16, and the flow of the foam heat insulating material 7 injected from the injection port 16 is flown. 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 reaching between the heat insulation panel 6 and the outer skin | cover 4, it reaches in the bending part 14, and it is filled efficiently and without leaving each.
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.

  Further, a protrusion 18 is formed at the end of the inner skin 5 of the bent portion 14. The protruding portion 18 extends obliquely downward and rearward from the end of the inner skin 5 of the bent portion 14, and further extends the tip end portion 18 a upward. The protruding portion 18 is connected to the bent portion 14. It is attached to the back wall part 1e which is a part. Specifically, the front end portion 18a is brought into surface contact with the inner skin 12 of the back wall portion 1e via a thin seal member (not shown), and this portion is fastened with a fastening component (not shown) such as a screw.

  The outer skin 4 of the bent portion 14 and the outer skin 11 of the inner wall portion 1e are joined to the end portion 4a of the outer skin 4 of the bent portion 14 by sealing the end bent portion 11a of the outer wall 11 of the inner wall portion 1e with a thin seal. This is done by stacking via a member (not shown) and fastening this part with a fastening part (not shown) such as a screw.

  The bent portion 14 is also provided with a suction pipe 19 for a refrigeration cycle, for example, in a serpentine shape. The suction pipe 19 connects an evaporator (evaporator / cooler) of a refrigeration cycle and a compressor (compressor) 23 described below. In addition, in FIG. 1, the connecting tool 20 used for joining with the left side wall part 1c, the ceiling wall part 1a (bending part 14), the bottom wall part 1b (bending part 24 mentioned later), and the back wall part 1e, 21 and 22, each extending long over the entire length of the joint portion, and the other portion of the suction pipe 19 inside the connector 22 used for joining the left wall portion 1 c and the back wall portion 1 e of the joint portion. Is arranged.

  The right side wall portion 1d also has similar connectors, and a conductive wire is provided inside the connector used for joining the right side wall portion 1d and the back wall portion 1e. Yes. This conductive wire connects a control device (not shown) that controls the overall operation of the refrigerator and an electrical component such as a cooling fan that is driven by receiving a signal from the control device.

  In the recess 15, a compressor 23 for the refrigeration cycle is placed and disposed. More specifically, the compressor 23 is arranged so that the center 23o is located in front of the center 15o of the recess 15, and the moment generated by the compressor 23 is formed at the end of the inner skin 5 of the bent portion 14. A back wall portion 1e which is a wall portion connected to the bent portion 14 is received via the.

On the other hand, FIG. 3 shows in detail the bent portion 24 formed at the portion where the bottom wall portion 1b and the back wall portion 1e are in contact with each other. It is not filled with the foam insulation 7. That is, the bent portion 24 is also constituted by only the foam heat insulating material 7 as the heat insulating material to be filled, and the thicknesses t ₅ and t ₆ are the thickness t ₇ of the bottom wall portion 1b and the thickness of the back wall portion 1e. As representatively shown in comparison with the length t ₄ , it is made larger than the other wall portions 1a to 1e.

Also, in this case, the bottom wall 1b has a rear end raised one step higher, and the back wall 1e has a lower end higher than the bottom wall 1b and is joined to the bent portion 24 by joining these ends. A recess 25 is formed that opens downward and rearward. The concave portion 25 is smaller than the concave portion 15 of the bent portion 14.
Reference numeral 26 denotes an inlet for injecting foam insulation, and this inlet 26 is formed in the outer skin 8 at the lower part of the bent part 24 (the front part of the recess 25) corresponding to the rear part of the bottom wall part 1b. Then, by injecting the foam heat insulating material 7 from the injection head H of the injector as indicated by the arrow B, the foam heat insulating material 7 is filled from the bent portion 24 to the bottom wall portion 1b.

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 that extends into the bent portion 24 is opposed to the above-described injection port 26, whereby the flow of the foam heat insulating material 7 injected from the injection port 26 is extended. 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 In addition to reaching between the panel 10 and the outer skin 8, it reaches between the extended portion 10 a in the bent portion 14 and the inner skin 9, and each is filled efficiently and without waste. Therefore, a portion 10 a of the vacuum heat insulating panel 10 that extends into the bent portion 24 functions as the same rectifying member as the rectifying member 17.
Note that the inner wall 9 of the bottom wall portion 1 b has a plurality of steps at the bent portion 24.

  And the protrusion part 27 is formed in the edge part of the endothelium 9 of the bending part 24. FIG. The protruding portion 27 extends obliquely rearward and upward from the end portion of the inner skin 9 of the bent portion 24, and further extends the tip portion 27 a downward. The protruding portion 27 is connected to the bent portion 24. It is attached to the back wall part 1e which is a part. Specifically, like the protruding portion 18 of the bent portion 14, the distal end portion 27a is brought into surface contact with the inner skin 12 of the back wall portion 1e via a thin seal member (not shown), and this portion is fastened with a screw or the like. Fastened with parts (not shown).

  The outer skin 8 of the bent portion 24 and the outer skin 11 of the back wall portion 1e are joined to the outer skin 11 of the back wall portion 1e at the end 8a of the outer skin 8 of the bent portion 24 in the same manner as the outer skin 4 of the bent portion 14. The end bent portion 11b is overlapped via a thin seal member (not shown), and this portion is fastened with a fastening component (not shown) such as a screw.

  As described above, the heat-insulating cabinet 1 of the present embodiment is configured such that the vacuum insulating panels (6, 10, 13) are disposed on the surrounding wall portions 1a to 1e to insulate the wall portions 1a to 1e. The bent portions 14 and 24 of 1a to 1e are filled with the foam heat insulating material 7. Thereby, it is not necessary to bend and arrange the vacuum heat insulating panel at the bent portions 14 and 24, and the problem of breakage of the vacuum heat insulating panel due to the bending is eliminated, so that the reliability of the heat insulating performance by the vacuum heat insulating panel can be obtained. Can do. In addition, since the number of man-hours due to the bending of the vacuum heat insulation panel is eliminated, an increase in cost can be avoided.

  In addition, in the heat insulation cabinet 1 of the present embodiment, the bent portion 14 has the injection port 16 for injecting the foam heat insulating material 7, and directs the flow of the foam heat insulating material 7 to a position facing the injection port 16. In addition to the rectifying member 17, the bent portion 24 has an inlet 26 for injecting the foam heat insulating material 7, and vacuum insulation as a rectifying member that directs the flow of the foamed heat insulating material 7 at a position facing the inlet 26. The extending portion 10a of the material 10 is provided. Among these, the foam heat insulating material 7 is brought into the space between the vacuum heat insulating panel 6 and the outer skin 4 of the ceiling wall portion 1a by the former, and the foam heat insulating material 7 is brought into the bent portion 14 so that both can be efficiently and fully filled. it can. On the other hand, the latter causes the foam heat insulating material 7 to reach between the vacuum heat insulating panel 10 and the outer skin 8 of the bottom wall portion 1b, and between the extended portion 10a and the inner skin 9 in the bent portion 14, It can be filled efficiently and without waste.

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. Thereby, the flow of the foam heat insulating material 7 injected into the bent portion 14 can be prevented from being obstructed by the vacuum heat insulating panel 6, and the foam heat insulating material 7 is attached to the vacuum heat insulating panel 6 and the outer skin 4 of the ceiling wall portion 1 a. And the bent portion 14 can be filled efficiently and without waste.

  On the other hand, in the bent part 24 of the heat insulation cabinet 1 of this embodiment, it is extended and arrange | positioned at the vacuum heat insulation panel 10 bent part 24. FIG. As a result, as described above, the extended portion 10a of the vacuum heat insulation panel 10 can function as a flow straightening member that directs the flow of the foam heat insulating material 7 injected from the injection port 26. Therefore, it is necessary to provide a separate flow straightening member. No further cost increase can be avoided. In this case, a concave corner portion 28 (see FIG. 3) is formed between the extended portion 10a of the vacuum heat insulating panel 10 and the inner wall 9 of the bottom wall portion 1b. The panel 10 can be filled without being separated by the extended portion 10a.

  Furthermore, in the heat insulation cabinet 1 of the present embodiment, the protruding portions 18 and 27 are formed at the end portions of the inner skins 5 and 9 of the bent portions 14 and 24, and the protruding portions 18 and 27 are formed as the bent 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 bent portions 14 and 24 are supported by the protruding portions 18 and 27 and can be coupled to the back wall portion 1e with high strength. Further, in this case, the protruding portion also holds the coupling of the adjacent wall portions of 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, a right angle). 18 and 27 function, that is, the protrusions 18 and 27 also function as means for holding the connection between adjacent wall portions at a predetermined angle (in this case, a right angle).

In addition, in the heat insulation cabinet 1 of the present embodiment, the inner skins 5 and 9 of the bent portions 14 and 24 are molded products, whereas the inner skin of the back wall portion 1e that is a wall portion connected to the bent portions 14 and 24. 12 is a sheet. Thereby, since a molded product is easy to produce and the sheet is inexpensive, further increase in cost can be 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 intensity | strength of the bending parts 14 and 24 can be ensured highly.

  In the heat insulation cabinet 1 of the present embodiment, a suction pipe 19 for the refrigeration cycle is further provided in the bent portion 14. As described above, the refrigeration cycle suction pipe 19 connects the evaporator of the refrigeration cycle and the compressor 23, and flows a low-temperature refrigerant. By providing the suction pipe 19 through which the low-temperature refrigerant flows in the bent portion 14 filled with the foam heat insulating material 7, the problem of dew condensation on the surface of the suction pipe 19 can be eliminated. Further, since the bent portion 14 can be used as an internal location of the suction pipe 19 and there is no need to secure another location, it is possible to avoid increasing the thickness of the other location.

  Further, in the heat insulation cabinet 1 of the present embodiment, the concave portion 15 exists in the bent portion 14, and the compressor 23 of the refrigeration cycle is located in the concave portion 15 such that the center 23 o is positioned in front 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, receives the moment generated by the protrusion portion 18 formed at the end portion of the inner skin 5 of the bending portion 14. Thereby, the bending part 14 can be kept strong with respect to the moment by arrangement | positioning of the compressor 23. FIG.

In contrast to this, FIG. 6 shows the second embodiment, and the same parts as those of the first embodiment are denoted by the same reference numerals, description thereof is omitted, and only different parts are described.
In this configuration, the compressor 23 of the refrigeration cycle is disposed in the concave portion 15 of the bent portion 14 such that the center 23 o is located behind the center 15 o of the concave portion 15. Similarly to the first embodiment, the protruding portion 18 formed in the above is attached to the back wall portion 1e, which is a wall portion connected to the bent portion 14, in surface contact with the tip portion 18a. Thereby, the bending part 14 can be kept strong, when the back wall part 1e receives the load by the weight of the compressor 23 via the protrusion part 18 formed in the edge part of the endothelium 5 of the bending part 14. FIG.

The present invention is not limited to the embodiment described above and shown in the drawings. For example, the bent portion 14 is provided with a thin vacuum heat insulating panel that can be bent without being damaged and is inexpensive. May be.
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 a structure which uses only a vacuum heat insulation panel. Furthermore, it is preferable to apply the same configuration as the bent portion 24 or the bent portion 14 of the above-described embodiment to the bent portion generated between the left side wall portion 1c and the right side wall portion 1d and the back wall portion 1e.

  In addition, although 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, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

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

Claims (10)

In a heat-insulating cabinet where a vacuum heat insulating panel is arranged on the surrounding wall to insulate,
A heat-insulating cabinet, wherein a bent portion of the wall portion is filled with a foam heat insulating material.   The heat insulation cabinet according to claim 1, further comprising an inlet for injecting the foam heat insulating material into the bent portion, and a flow regulating member for directing the flow of the foam heat insulating material at a position facing the inlet.   The heat insulation cabinet according to claim 1 or 2, wherein the vacuum heat insulation panel is disposed within a range not extending into the bent portion.   The heat insulation cabinet according to claim 1 or 2, wherein the vacuum heat insulation panel is disposed so as to extend into the bent portion.   The heat insulation cabinet according to any one of claims 1 to 4, wherein a protrusion is formed at an end of the inner skin of the bent portion, and the protrusion is attached to a wall portion connected to the bent portion.   6. The heat insulating cabinet according to claim 1, wherein the inner skin of the bent portion is a molded product, and the inner skin of the wall portion connected to the bent portion is a sheet.   The heat insulation cabinet according to any one of claims 1 to 6, wherein the bent portion is thicker than other wall portions.   The heat insulation cabinet according to any one of claims 1 to 7, wherein a suction pipe of a refrigeration cycle is provided in the bent portion.   There is a concave part in the bent part, and the compressor of the refrigeration cycle is arranged in this concave part so that the center is located in front of the center of the concave part, and the resulting moment is formed at the end of the inner part of the bent part 6. The heat insulating cabinet according to claim 5, wherein a wall portion connected to the bent portion is received through the protruding portion.   There is a concave portion in the bent portion, and in this concave portion, a compressor of the refrigeration cycle is arranged so that the center thereof is located behind the center of the concave portion, and a protruding portion formed at the end of the inner end of the bent portion, 6. The heat insulation cabinet according to claim 5, wherein the heat insulation cabinet is mounted in surface contact with a wall portion connected to the bent portion.

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