JP4922328B2 - refrigerator - Google Patents

Description

  The present invention relates to a refrigerator using a vacuum heat insulation panel.

  In recent years, refrigerators have a tendency to increase in capacity, and in order to realize this, the thickness of the heat insulating wall of the refrigerator body is reduced. However, in a part having a large thermal influence from the outside, such as a peripheral part of a machine room in which a compressor that generates heat is arranged during the refrigeration cycle, a heat insulating performance with a small thickness is insufficient. Then, using the thin vacuum insulation panel excellent in heat insulation for the part is performed (for example, refer patent document 1).

  In addition, the vacuum heat insulation panel, for example, a glass wool, which is a thin fiberglass cotton, is matted into a core material, and this core material is inserted into a gas barrier container made of aluminum foil and a synthetic resin laminated film, This is a panel in which the inside of the container is kept in a vacuum reduced pressure state by evacuating the inside and closing the opening, and has a thin and low thermal conductivity (heat insulating property).

JP 2006-90650 A

  What uses the above-mentioned vacuum heat insulation panel is the rear lower part of the refrigerator main body configured by filling foam insulation such as polyurethane foam between the outer box and the inner box accommodated in the outer box. A machine room is provided, and a vacuum heat insulation panel is disposed from the bottom of the refrigerator main body to the inclined part in front of the machine room.

  In this case, the vacuum heat insulation panel is fixed to the bottom surface of the outer box on the bottom side of the refrigerator main body with a double-sided adhesive tape, and on the inclined side, avoids a plurality of vent holes formed on the inclined surface of the outer box. A plurality of relatively small block spacers are each fixed to the inclined surface with a double-sided adhesive tape, and a vacuum insulation panel is further fixed to each spacer with a double-sided adhesive tape. That is, the vacuum heat insulation panel is fixed to the inclined surface of the outer box on the inclined portion side of the refrigerator body via a plurality of relatively small block spacers arranged so as to avoid the gas vent holes.

  The above-mentioned vent hole is for venting the necessary gas when filling the foam insulation between the outer box and the inner box. A plurality are arranged to avoid. However, in such a spacer, although it is relatively small, it hinders the progress of filling of the foam insulation material, and in particular, it is difficult to fill up to the lower part of the inclined portion of the refrigerator body in front of the machine room that is the destination of the progress, As a result, there is insufficient heat insulating material around the vacuum heat insulating panel, resulting in insufficient heat insulating performance.

  In this case, it is also conceivable to reduce the spacer from hindering the progress of filling of the foam heat insulating material by making the spacer smaller. However, in that case, there is a problem that the fixing of the vacuum heat insulating panel is neglected due to the smaller spacer.

  The present invention has been made in view of the above-described circumstances, and therefore the object thereof is to dispose a vacuum heat insulation panel from the bottom of the refrigerator main body to the inclined portion in front of the machine room, and the heat insulating performance in the inclined portion is provided. An object of the present invention is to provide a refrigerator which can be obtained satisfactorily and which can securely fix the vacuum heat insulating panel at the inclined portion.

  In order to achieve the above object, in the refrigerator of the present invention, the rear lower part of the refrigerator main body configured by filling a foam heat insulating material between the outer box and the inner box accommodated in the outer box. In the front of the machine room, the vacuum heat insulation panel is disposed from the bottom of the refrigerator main body to the inclined part, and the vacuum heat insulation panel is arranged on the bottom side of the refrigerator main body. The heat insulating mat is disposed between the inclined portion and the inclined surface of the outer box, which is fixed to the bottom surface, and fills the space on the lower side therebetween (invention of claim 1).

  According to the above means, in the inclined part of the refrigerator main body in front of the machine room, there is a vacuum heat insulating panel, and a heat insulating mat is interposed between the vacuum heat insulating panel and the inclined surface of the outer box, By the thermal insulating mat filling the space on the lower side between the vacuum heat insulating panel and the inclined surface of the outer box, good heat insulating performance can be obtained up to the lower part. Moreover, the thermal insulation mat fills the space on the lower side between the vacuum heat insulation panel and the inclined surface of the outer box, so that the vacuum heat insulation panel can be reliably fixed at the inclined portion.

1 is a longitudinal side view of a main portion showing a first embodiment of the present invention (a cross-sectional view taken along line II in FIG. 2). Front view of main part without inner box Cross-sectional view of main part (cross-sectional view taken along line III-III in FIG. 2) Exploded perspective view of main parts Sectional drawing which follows the VV line of FIG. 2 which shows 2nd Example of this invention FIG. 5 equivalent diagram showing a third embodiment of the present invention.

Hereinafter, a first example (first embodiment) of the present invention will be described with reference to FIGS.
First, FIG. 1 shows the structure of a freezer compartment in the lower part of a refrigerator, particularly a refrigerator. In FIG. 1, a refrigerator main body 1 is configured by filling a foam heat insulating material 4 such as foamed polyurethane between an outer box 2 and an inner box 3 accommodated in the outer box 2. The outer box 2 is formed by joining a plurality of bent steel plates, and the inner box 3 is formed by molding plastic.

A machine room 5 is formed in the rear lower part of the refrigerator main body 1 by a recess. In the machine room 5, a compressor 6 and its peripheral parts (not shown) in the refrigeration cycle are arranged.
In front of the machine room 5, there is a horizontal bottom 1a of the refrigerator body 1 and an inclined portion 1b that rises rearward and upward from the bottom 1a. A vacuum heat insulating panel 7 is arranged from the bottom 1a to the inclined portion 1b. Has been established. Therefore, the vacuum heat insulating panel 7 also has a substantially L shape having a horizontal portion 7a and an inclined portion 7b that rises rearward and upward from the horizontal portion 7a.

As described above, the vacuum heat insulating panel 7 is a gas barrier in which, for example, glass wool, which is a thin glass fiber cotton material, is matted to form a core material, and the core material is made of a laminated film of aluminum foil and a synthetic resin. It is a panel that is inserted into a container and evacuated to close the opening to keep the inside of the container in a vacuum-depressurized state, and has a thin and low thermal conductivity (heat insulation).
On the bottom 1a side of the refrigerator main body 1, the vacuum heat insulating panel 7 is fixed to the bottom surface 2a of the outer box 2 with, for example, a double-sided adhesive tape (not shown) by the horizontal portion 7a.

  On the other hand, on the inclined portion 1b side, the heat insulating mat 8 is fixed to the lower side of the inclined surface 2b of the outer box 2 with, for example, a double-sided adhesive tape (not shown). In this case, the heat insulating mat 8 is made of foamed plastic, and does not allow the foam heat insulating material 4 to enter. The heat insulating mat 8 is located on the lower left side of the inclined surface 2b of the outer box 2 shown in FIG. It has a width laid from the end to the portion near the right end, and a slightly larger thickness as shown in FIG.

  In addition, the inclined portion 1b of the refrigerator body 1 swells in a portion near the right end portion corresponding to the compressor 6 and on the opposite side to the machine room 5 side as shown in FIGS. As shown in FIGS. 3 and 4, the bulging portion 9 is formed, and the portion of the thermal insulating mat 8 on the bulging portion 9 side, particularly the machine chamber 5 side, is located on the bulging portion 9. It is formed in a conforming shape 8a. The heat insulating mat 8 has a depth (thickness) dimension X (see FIG. 3) of 5 mm or more at the end of the shape 8a portion that follows the bulging portion 9 in consideration of formability. Is preferred.

  The vacuum heat insulating panel 7 has the inclined portion 7b fixed to the heat insulating mat 8 with, for example, a double-sided adhesive tape (not shown). Thus, the vacuum heat insulating panel 7 is arranged on the inclined portion 1b side of the refrigerator body 1 as shown in FIG. As shown in FIG. 1, a thermal insulation mat 8 is provided between the inclined surface 2 b of the outer box 2 and a space on the lower side between the outer box 2 and the foam insulation 4 is filled without entering the foam insulation 4. .

Then, as shown in FIG. 2, a plurality of gas vent holes 10 are provided in advance on the inclined surface 2b of the outer casing 2 located in the peripheral portion of the vacuum heat insulating panel 7 (in this case, both the left and right sides and above). Forming. Further, the gas vent hole 10 is formed from the vacuum heat insulation panel 7 side so that the burr comes out in the direction opposite to the vacuum heat insulation panel 7 side in order to avoid damage to the vacuum heat insulation panel 7 due to the burr.
In addition, as shown in FIG. 1, a rearwardly inclined portion 11 is formed at the rear portion of the bottom surface 2 a of the outer box 2, thereby absorbing a bulge when the vacuum heat insulating panel 7 is broken by any chance. However, the bulge is prevented from reaching the refrigerator installation surface.

In FIG. 1, reference numeral 12 denotes a freezing room surrounded by the bottom part 1a and the inclined part 1b of the refrigerator main body 1 and the back part 1c and both side parts 1d. Are stored separately. The storage containers 13 and 14 are individually attached to upper and lower doors 15 and 16 that open and close the opening on the front surface of the freezer compartment 12.
Further, a cooling chamber 18 is formed in the inner part of the freezer compartment 12 by a shielding plate 17, and an evaporator (cooler) 19 for the freezing chamber in the refrigeration cycle and the air in the freezing chamber 12 are shielded in the cooling chamber 18. A freezer compartment circulation fan 20 that is circulated in contact with the freezer compartment evaporator 19 through an intake port 17a and an exhaust port 17b is provided.

  Now, as described above, the vacuum heat insulation panel 7 is fixed to the bottom surface 2a of the outer box 2 on the bottom 1a side of the refrigerator main body 1, and between the inclined surface 2b of the outer box 2 on the inclined part 1b side. In the case where the space on the lower side is disposed by interposing a heat insulating mat 8 that fills the foam heat insulating material 4 without intruding, the presence of the vacuum heat insulating panel 7 in the inclined portion 1b of the refrigerator body 1; A heat insulating mat 8 is interposed between the vacuum heat insulating panel 7 and the inclined surface 2b of the outer box 2, and the heat insulating mat 8 is located on the lower side between the vacuum heat insulating panel 7 and the inclined surface 2b of the outer box 2. By filling the space, compared to the conventional vacuum insulation panel fixed to the inclined surface of the outer box through a plurality of relatively small block spacers, the lower part without the foam insulation 4 Good heat insulation performance can be obtained. Therefore, there is no shortage in the heat insulation performance, and in particular, good heat insulation performance of the freezer compartment 12 with respect to the heat generated by the compressor 6 disposed in the machine room 5 behind the inclined portion 1b can be obtained.

  Further, the heat insulating mat 8 fills the space on the lower side between the vacuum heat insulating panel 7 and the inclined surface 2b of the outer box 2, so that the vacuum heat insulating panel 7 can be securely fixed to the inclined portion 1b. Become. The heat insulating mat 8 may be merely interposed between the vacuum heat insulating panel 7 and the inclined surface 2b of the outer box 2, and is not necessarily fixed to the inclined surface 2b of the outer box 2 and the vacuum heat insulating panel 7. Even if it is fixed, it may be fixed only to one of the inclined surface 2b of the outer box 2 and the vacuum heat insulating panel 7.

  In addition, in the thing of the said structure, the vent hole 10 is provided in the inclined surface 2b of the outer case 2 located in the surrounding part of the vacuum heat insulation panel 7. FIG. As described above, the gas vent hole 10 is for venting the gas necessary for filling the foamed heat insulating material 4 between the outer box 2 and the inner box 3. It is located in the peripheral part of the heat insulation panel 7 and is provided on the inclined surface 2 b of the outer box 2, so that necessary degassing is performed from the gas vent hole 10 and from the other parts to the peripheral part of the vacuum heat insulation panel 7. The foam heat insulating material 4 can be sufficiently filled, and the heat insulating performance of the refrigerator main body 1, particularly the inclined portion 1 b can be obtained more favorably.

  Further, the inclined portion 1b of the refrigerator body 1 has a bulging portion 9 that bulges to the opposite side of the machine room 5 corresponding to the compressor 6 disposed in the machine room 5, and a heat insulating mat 8 is provided. A portion of the bulging portion 9 side of the bulging portion 9 is formed into a shape 8 a that follows the bulging portion 9. Accordingly, the heat insulating mat 8 can be attached not only to the portion excluding the bulging portion 9 of the inclined surface 2b of the outer box 2, but also to the bulging portion 9, so that the heat insulation of the inclined portion 1b of the refrigerator body 1 can be achieved. The performance, in particular, the heat insulation performance of the freezer compartment 12 with respect to the heat generated by the compressor 6 can be obtained more satisfactorily, and the vacuum heat insulation panel 7 can be more securely fixed to the inclined portion 1b.

  5 and 6 show the second and third examples (second and third embodiments) of the present invention, and the same parts as those in the first example are the same as those in the first example. A description will be omitted with reference numerals, and only different parts will be described.

[Second Embodiment]
In 2nd Example shown in FIG. 5, it protrudes in the vacuum heat insulation panel 7 side in the inclined surface 3b (bulging part 9) of the inner case 3 which comprised the inclination part 1b of the refrigerator main body 1 in the front of the machine room 5. As shown in FIG. The elastic body 21 is attached and provided.

  By doing in this way, it can prevent by the elastic body 21 that the vacuum heat insulation panel 7 hits the inclined surface 3b of the inner box 3 at the time of filling with the foam heat insulating material 4, and can prevent the vacuum heat insulation panel 7 from being damaged. In addition, the elastic body 21 can secure the space between the vacuum heat insulating panel 7 and the inclined surface 3b of the inner box 3 to secure the filling flow path of the foam heat insulating material 4, and when the vacuum heat insulating panel 7 is damaged. It is possible to prevent the bulging portion from reaching the inclined surface 3b of the inner box 3 and deforming the inclined surface 3b.

[Third embodiment]
In 3rd Example shown in FIG. 6, it protrudes in the vacuum heat insulation panel 7 side in the inclined surface 3b (bulging part 9) of the inner case 3 which comprised the inclination part 1b of the refrigerator main body 1 in the front of the machine room 5. As shown in FIG. Convex forming part 31 is provided.

Even if it does in this way, while being the above-mentioned, while being able to ensure the space | interval of the vacuum heat insulation panel 7 and the inclined surface 3b of the inner box 3, the filling flow path of the foam heat insulating material 4 can be ensured, and by any chance, the vacuum heat insulation panel 7 It is possible to prevent the bulge when the is damaged from reaching the inclined surface 3b of the inner box 3 and deforming the inclined surface 3b.
In addition, the present invention is not limited to the embodiments described above and shown in the drawings, and can be implemented with appropriate modifications without departing from the scope of the invention.

  In the drawings, 1 is a refrigerator body, 1a is a bottom portion, 1b is an inclined portion, 2 is an outer box, 2a is a bottom surface, 2b is an inclined surface, 3 is an inner box, 4 is a foam insulation, 5 is a machine room, and 6 is a compressor. , 7 is a vacuum heat insulating panel, 8 is a heat insulating mat, 8a is a shape following the bulging portion, 9 is a bulging portion, 10 is a vent hole, 21 is an elastic body, and 31 is a convex molding portion.

Claims (5)

Between the outer box and the inner box housed in the outer box, the refrigerator body configured by filling with foamed heat insulating material is provided with a machine room in the lower rear part,
In the front of the machine room, from the bottom of the refrigerator body to the inclined part, a vacuum heat insulation panel is disposed,
The vacuum heat insulation panel is fixed to the bottom surface of the outer box on the bottom side of the refrigerator main body, and the foam heat insulating material enters the space on the lower side between the inclined surface of the outer box on the inclined part side. A refrigerator characterized in that a heat insulating mat that is buried without being interposed is interposed.   The refrigerator according to claim 1, wherein a gas vent hole is provided in an inclined surface of the outer box located at a peripheral portion of the vacuum heat insulating panel.   An inclined portion of the refrigerator main body in front of the machine room has a bulge that bulges on the opposite side of the machine room corresponding to the compressor of the refrigeration cycle disposed in the machine room. 2. The refrigerator according to claim 1, wherein a portion on the bulging portion side is formed in a shape that follows the bulging portion.   2. The refrigerator according to claim 1, wherein an elastic body protruding toward the vacuum heat insulation panel is provided on an inclined surface of an inner box constituting an inclined portion of the refrigerator main body in front of the machine room.   The refrigerator according to claim 1, wherein a convex molding portion that protrudes toward the vacuum heat insulation panel is provided on the inclined surface of the inner box that constitutes the inclined portion of the refrigerator main body in front of the machine room.

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