TWI401404B - Refrigerator - Google Patents

Description

refrigerator

The present invention relates to a refrigerator using a vacuum insulated panel.

In recent years, the refrigerator has a tendency to increase in capacity, and the thickness of the heat insulating wall of the refrigerator main body has been reduced in order to achieve a large capacity. However, in the refrigeration cycle, the peripheral portion of the machine room in which the compressor having heat is placed is affected by the heat from the outside, and the heat insulating performance is insufficient in the case of the thin heat insulating wall. Therefore, a vacuum heat insulating panel which is thin and has excellent heat insulating properties is used in this portion (see, for example, Patent Document 1).

Further, the vacuum heat insulating panel is a panel in which, for example, a thin glass fiber sponge, that is, glass wool, is formed into a mat shape as a core material, and the core material is inserted into a laminate of aluminum foil and synthetic resin. The inside of the gas barrier container of the bag made of the foil is evacuated and the opening is closed, so that the inside of the container is kept in a vacuum decompression state, and the vacuum heat insulating panel is thin and has low thermal conductivity (heat insulation).

[Patent Document 1] Japanese Patent Laid-Open Publication No. 2006-90650

In the refrigerator using the vacuum insulated panel described above, the configuration of the machine room can be seen below the rear portion of the refrigerator main body, wherein the refrigerator main body is filled with foamed polyurethane between the outer box and the inner box housed inside the outer box. It is composed of a foaming heat insulating material.

Further, a vacuum heat insulating panel is disposed in the foam heat insulating material from the bottom of the refrigerator main body to the inclined portion in front of the machine room.

In this case, the vacuum heat insulating panel is fixed on the bottom surface of the outer casing by the double-sided adhesive tape on the bottom side of the refrigerator main body, and is fixed on the inclined portion side on a plurality of relatively small square-shaped pads, wherein The spacer is provided on a sloped surface of the outer casing so as to avoid a portion in which a plurality of exhaust holes are formed.

That is, the liner is fixed to the inclined surface by the double-sided adhesive tape, and the vacuum insulation panel is fixed to the respective liners by the double-sided adhesive tape.

The vent hole is used for performing necessary gas discharge when filling the foamed heat insulating material between the outer box and the inner box, and therefore, the gasket is a portion having a relatively small square shape and avoiding the vent hole. Configure multiple. However, although such a spacer is relatively small, it does not interfere with the filling of the foamed heat insulating material, and in particular, it is difficult to fill the lower portion of the inclined portion of the refrigerator main body in front of the machine room in which the target is traveled, and as a result, The periphery of the vacuum insulation panel is not sufficiently filled with the heat insulating material, resulting in insufficient thermal insulation properties.

In this case, a method of making the liner smaller and reducing the impediment of the gasket to the filling of the foamed heat insulating material is also considered. However, in this case, since a smaller spacer is used, there is a problem that the fixing of the vacuum heat insulating panel becomes unreliable.

An object of the present invention is to provide a refrigerator which is formed in view of the above, wherein a vacuum heat insulating panel is disposed in a range from a bottom portion of a refrigerator main body in front of a machine room to an inclined portion, and a vacuum partition of the inclined portion can be surely fixed. Hot panel and good thermal insulation properties.

In order to achieve the above object, the present invention provides a refrigerator in which a foamed heat insulating material is filled between an outer box and an inner box housed inside the outer box. The rear lower portion of the refrigerator main body is provided with a machine room, and a vacuum heat insulating panel is provided in a range from the bottom of the refrigerator main body to the inclined portion in front of the machine room. The vacuum insulation panel is fixed to the bottom surface of the outer casing on the bottom side of the refrigerator main body, and is provided with a thermal insulating mat between the inclined portion side and the inclined surface of the outer casing, and the thermal insulation mat is provided. The space on the lower side between the vacuum heat insulating panel and the inclined surface of the outer casing is buried to prevent the entry of the foaming heat insulating material.

According to the above method, a vacuum heat insulating panel is present at an inclined portion of the refrigerator main body in front of the machine room, and a thermal insulating mat is inserted between the vacuum heat insulating panel and the inclined surface of the outer box, and the thermal insulating mat is interposed. The space on the lower side between the vacuum heat insulating panel and the inclined surface of the outer casing is buried, so that good heat insulation performance can be obtained up to the lower portion. Further, since the heat insulating mat is embedded in the space on the lower side between the vacuum heat insulating panel and the inclined surface of the outer casing, the vacuum heat insulating panel of the inclined portion can be reliably fixed.

Hereinafter, a first embodiment of the present invention will be described with reference to Figs. 1 to 4 .

First, Fig. 1 shows the construction of a freezer compartment portion of a refrigerator, particularly a lower portion of a freezer refrigerator. In FIG. 1, the refrigerator main body 1 is configured by filling a foamed heat insulating material 4 such as foamed urethane between the outer casing 2 and the inner casing 3 housed inside the outer casing 2. The outer case 2 is formed by joining a plurality of curved steel sheets, and the inner case 3 is formed by molding a plastic.

In the lower rear portion of the refrigerator main body 1, a machine room 5 is formed by a recess, and a compressor 6 constituting a refrigeration cycle is disposed in the machine room 5. And its peripheral members (not shown).

In front of the machine room 5, there are a horizontal bottom portion 1a of the refrigerator main body 1 and an inclined portion 1b rising upward from the bottom portion 1a, and a vacuum heat insulating panel 7 is disposed in a range from the bottom portion 1a to the inclined portion 1b. . Therefore, the vacuum heat insulating panel 7 also has a substantially L shape having a horizontal portion 7a and an inclined portion 7b, and the inclined portion 7b rises rearward and upward from the horizontal portion 7a.

The vacuum heat insulating panel 7 is a panel in which, for example, a glass fiber of fine glass fiber, that is, glass wool, is formed into a mat shape as a core material, and the core material is inserted into a laminated foil of aluminum foil and synthetic resin. Inside the gas barrier container of the bag, the inside is evacuated and the opening is closed, so that the inside of the container is kept in a vacuum decompression state, and the vacuum heat insulating panel is thin and has low thermal conductivity (heat insulation).

More specifically, as described in the above-mentioned Patent Document 1, the gas barrier film having high gas barrier properties is folded back and the both sides are closely bonded to each other, and the heat-fusible layers are welded to each other to form a bag-shaped housing member, and in this state, Inserting a core material having heat insulating properties without generating out gas, and discharging the gas inside the bag-shaped housing member in a vacuum exhaust device to form a vacuum state, and then welding the remaining side of the heat-fusible layers to each other And the gas barrier film is formed by, for example, a gas barrier layer composed of a heat-sealing sealing layer such as a laminated linear low-density polyethylene layer or a metal layer such as an aluminum foil, and a nylon layer. A protective layer that mitigates impact.

The vacuum heat insulating panel 7 is fixed to the bottom surface 2a of the outer casing 2 by a horizontal portion 7a by, for example, a double-sided adhesive tape (not shown) on the bottom portion 1a side of the refrigerator main body 1.

On the other hand, on the side of the inclined portion 1b, the thermal insulating mat 8 is fixed to the lower side of the inclined surface 2b of the outer casing 2 by, for example, a double-sided adhesive tape (not shown). The thermal insulating pad 8 is composed of a foamed plastic in this case for preventing the entry of the aforementioned foamed heat insulating material 4, as shown in Fig. 2, and the size thereof is on the lower side of the inclined surface 2b of the outer casing 2, The layout is performed from a portion substantially at the left end portion to a portion of the right side portion, and is configured to be slightly thick as shown in Fig. 1 . That is, the thickness of the thermal insulating mat 8 is a thickness which is half the distance between the inclined surface 2b of the outer casing 2 of the inclined portion 1b and the opposing surface of the inner box 3.

Further, as shown in FIGS. 2 and 3, a portion of the inclined portion 1b of the refrigerator main body 1 corresponding to the compressor 6 on the right end portion is formed as a bulging portion that bulges to the opposite side of the machine chamber 5 side. 9.

Further, on the side of the machine room 5 where the thermal insulating mat 8 of the inclined portion 1b and the bulging portion 9 face each other, as shown in Figs. 3 and 4, a bulging shape portion 8a corresponding to the bulging portion 9 is formed. Further, in consideration of the formability, the depth (thickness) dimension X (refer to FIG. 3) of the end portion of the portion of the thermal insulating mat 8 corresponding to the bulging portion 8a of the bulging portion 9 is preferably 5 [mm] or more. .

The vacuum heat insulating panel 7 is fixed to the thermal insulating mat 8 by, for example, a double-sided adhesive tape (not shown).

In this way, the vacuum heat insulating panel 7 is inserted into the inclined portion 1b side of the refrigerator main body 1 so as to be inserted between the inclined surface 2b of the outer casing 2 and the thermal insulating mat 8 so as to be buried. A space formed on the lower side of the inclined portion 1b.

As a result, the aforementioned foamed heat insulating material 4 can be prevented from entering between the vacuum heat insulating panel 7 and the inclined surface 2b of the outer casing 2.

Further, in the peripheral portion (in this case, the left and right sides and the upper side) of the vacuum heat insulating panel 7, as shown in FIG. 2, a plurality of exhaust holes 10 are formed in advance on the inclined surface 2b of the outer casing 2.

Further, in order to avoid breakage of the vacuum heat insulating panel 7 due to burrs generated when the vent hole 10 is formed, the vent hole 10 is formed from the side of the vacuum heat insulating panel 7 to insulate the burr toward the vacuum. The side of the panel 7 is opposite.

In addition, in Fig. 1, reference numeral 12 denotes a freezing chamber formed by the bottom portion 1a and the inclined portion 1b of the refrigerator main body 1 and the back portion 1c and the side portions 1d, and the freezing chamber 12 can be individually accessed. Storage containers 13 and 14 are housed. Further, the storage containers 13 and 14 are individually attached to the upper and lower doors 15, 16 for opening and closing the opening of the front surface of the freezing compartment 12.

Further, inside the freezing compartment 12, the cooling chamber 18 is formed by the shielding plate 17, and the freezing compartment evaporator (cooler) 19 and the freezing compartment circulating fan 20 in the refrigeration cycle are disposed in the cooling compartment 18, wherein The freezing chamber circulation fan 20 causes the air in the freezing compartment 12 to come into contact with the freezing compartment evaporator 19 through the intake port 17a and the exhaust port 17b of the shielding plate 17, and circulates.

As described above, the vacuum heat insulating panel 7 is fixed to the bottom surface 2a of the outer casing 2 on the side of the bottom portion 1a of the refrigerator main body 1, and on the inclined portion 1b side, the inclined surface 2b of the vacuum heat insulating panel 7 and the outer casing 2 is The heat insulating mat 8 is inserted into the space portion on the lower side of the space to arrange the vacuum heat insulating panel 7 so as not to enter the foam heat insulating material 4.

Thereby, the vacuum heat insulating panel 7 is present in the inclined portion 1b of the refrigerator main body 1, and the thermal insulating mat 8 is inserted between the vacuum heat insulating panel 7 and the inclined surface 2b of the outer casing 2, and the thermal insulating mat 8 is buried. The space on the lower side between the vacuum heat insulating panel 7 and the inclined surface 2b of the outer box 2 is used to fix the vacuum heat insulating panel to the tilt of the outer box via a plurality of relatively small square-shaped spacers. Compared with the method on the surface, even without the foamed heat insulating material 4, good heat insulating properties can be obtained up to the lower portion.

Therefore, the heat insulation performance is not insufficient, and in particular, the heat insulation performance of the freezer 12 to the heat generated by the compressor 6 disposed in the machine room 5 behind the inclined portion 1b can be obtained.

Further, since the thermal insulating mat 8 is buried in the space on the lower side between the vacuum heat insulating panel 7 and the inclined surface 2b of the outer casing 2, the vacuum heat insulating panel 7 of the inclined portion 1b of the refrigerator main body 1 can be surely performed. fixed.

Further, the thermal insulating mat 8 can be inserted only between the vacuum heat insulating panel 7 and the inclined surface 2b of the outer casing 2, and it is not necessary to make the thermal insulating mat 8 on the inclined surface 2b of the outer casing 2 as in the first embodiment. Both the vacuum insulation panel 7 and the vacuum heat insulating panel 7 are fixed, and only one of the inclined surface 2b of the outer casing 2 and the vacuum heat insulating panel 7 may be fixed.

In the above configuration, the vent hole 10 is provided in the peripheral portion of the vacuum heat insulating panel 7 on the inclined surface 2b of the outer casing 2. When the vent hole 10 is filled with the foam heat insulating material 4 between the outer box 2 and the inner box 3, necessary gas discharge is performed.

Since the vent hole 10 is located at the peripheral portion of the vacuum heat insulating panel 7 and is provided on the inclined surface 2b of the outer casing 2, it is possible to discharge necessary gas from the vent hole 10, and the foamed heat insulating material 4 is provided from other portions. Fully filled To the peripheral portion of the vacuum heat insulating panel 7, the refrigerator main body 1, particularly the inclined portion 1b therein, can obtain better heat insulating properties.

Further, at the inclined portion 1b of the refrigerator main body 1, a bulging portion 9 bulging toward the opposite side of the machine chamber 5 side is provided corresponding to the compressor 6 disposed in the machine room 5, and a thermal insulating mat is provided. A bulging shape portion 8a corresponding to the bulging portion 9 is formed in a portion on the side of the bulging portion 9 of 8.

Thereby, the thermal insulating mat 8 can be formed not only in the portion other than the bulging portion 9 from which the inclined surface 2b of the outer casing 2 is removed, but also in the shape corresponding to the bulging portion 9, and the refrigerator main body 1 can be obtained more satisfactorily. The heat insulating performance of the inclined portion 1b, in particular, the heat insulating performance of the freezing chamber 12 to the heat generated by the compressor 6, and the fixing of the vacuum heat insulating panel 7 of the inclined portion 1b is more surely performed.

5 and 6 are the second and third embodiments of the present invention, and the same portions as those of the first embodiment are denoted by the same reference numerals, and their description will be omitted, and only different portions will be described.

[Second Embodiment]

In the second embodiment shown in FIG. 5, the vacuum insulating panel is attached to the inclined surface 3b (bulging portion 9) of the inner box 3 constituting the inclined portion 1b of the refrigerator main body 1 in front of the machine room 5. The elastic body 21 protrudes on the 7 side.

In this way, when the foamed heat insulating material 4 is filled, the elastic body 21 can prevent the vacuum heat insulating panel 7 from contacting the inclined surface 3b of the inner box 3, thereby preventing damage of the vacuum heat insulating panel 7.

Further, the elastic body 21 can ensure the interval between the vacuum heat insulating panel 7 and the inclined surface 3b of the inner box 3, and secure the filling flow path of the foam heat insulating material 4, and can prevent the vacuum heat insulating panel 7 from being damaged. Drumming part of the wave The inclined surface 3b is deformed by the inclined surface 3b of the inner box 3.

[Third embodiment]

In the third embodiment shown in FIG. 6, the vacuum insulating panel 7 is provided on the inclined surface 3b (bulging portion 9) of the inner box 3 constituting the inclined portion 1b of the refrigerator main body 1 in front of the machine room 5. A convex forming portion 31 that protrudes sideways.

In the same manner as in the second embodiment, the interval between the vacuum heat insulating panel 7 and the inclined surface 3b of the inner box 3 can be ensured, and the filling flow path of the foam heat insulating material 4 can be secured, and the vacuum heat insulating panel can be prevented. 7 When the breakage occurs, the bulging portion spreads to the inclined surface 3b of the inner box 3 to deform the inclined surface 3b.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the invention, and any one of ordinary skill in the art can make some modifications and refinements without departing from the spirit and scope of the invention. The scope of the invention is defined by the scope of the appended claims.

1‧‧‧ refrigerator main body

1a‧‧‧ bottom

1b‧‧‧ inclined section

1c‧‧‧ Back

1d‧‧‧ both sides

2‧‧‧Outer box

2a‧‧‧ bottom

2b‧‧‧ sloped surface

3‧‧‧ inner box

3b‧‧‧ sloped surface

4‧‧‧Foam insulation materials

5‧‧‧ machine room

6‧‧‧Compressor

7‧‧‧Vacuum insulation panel

7a‧‧‧ horizontal department

7b‧‧‧ tilting section

8‧‧‧Hot insulation mat

8a‧‧‧Bulging the shape department

9‧‧‧ bulging department

10‧‧‧ venting holes

12‧‧‧Freezer

13, 14‧‧‧ Storage containers

15, 16‧‧‧ upper and lower doors

17‧‧‧Shielding board

17a‧‧‧ suction port

17b‧‧‧Exhaust port

18‧‧‧Cooling room

19‧‧‧ Freezer evaporator

20‧‧‧Circular fan for freezer

21‧‧‧ Elastomers

31‧‧‧ convex forming

Fig. 1 is a longitudinal side view (a cross-sectional view taken along line I-I of Fig. 2) of a main portion of a first embodiment of the present invention.

Fig. 2 is a front elevational view showing a state in which the inner casing of the main portion is removed.

Fig. 3 is a cross-sectional view of a main portion (a cross-sectional view taken along line III-III of Fig. 2).

Fig. 4 is an exploded perspective view of the main part.

Fig. 5 is a cross-sectional view taken along line V-V of Fig. 2 showing a second embodiment of the present invention.

Fig. 6 is a cross-sectional view taken along line V-V of Fig. 2 showing a third embodiment of the present invention.

1‧‧‧ refrigerator main body

1a‧‧‧ bottom

1b‧‧‧ inclined section

1c‧‧‧ Back

1d‧‧‧ both sides

2‧‧‧Outer box

2a‧‧‧ bottom

2b‧‧‧ sloped surface

3‧‧‧ inner box

4‧‧‧Foam insulation materials

5‧‧‧ machine room

6‧‧‧Compressor

7‧‧‧Vacuum insulation panel

7a‧‧‧ horizontal department

7b‧‧‧ tilting section

8‧‧‧Hot insulation mat

9‧‧‧ bulging department

12‧‧‧Freezer

13, 14‧‧‧ Storage containers

15, 16‧‧‧ upper and lower doors

17‧‧‧Shielding board

17a‧‧‧ suction port

17b‧‧‧Exhaust port

18‧‧‧Cooling room

19‧‧‧ Freezer evaporator

20‧‧‧Circular fan for freezer

Claims (5)

A refrigerator in which a foaming heat insulating material is filled between an outer box and an inner box housed inside the outer box, and a rear portion of the refrigerator main body includes a machine room, and the front side of the machine room is from the bottom of the refrigerator main body to the inclined portion. The vacuum heat insulating panel is provided in the vacuum heat insulating panel, wherein the vacuum heat insulating panel is fixed to the bottom surface of the outer casing on the bottom side of the refrigerator main body, and heat is inserted between the inclined portion side and the inclined surface of the outer casing. Provided by an insulating mat, the heat insulating mat is embedded in a space on a lower side between the vacuum heat insulating panel and the inclined surface of the outer casing to prevent entry of the foam heat insulating material. The refrigerator according to claim 1, wherein an exhaust hole is provided on an inclined surface of the outer casing located at a peripheral portion of the vacuum insulated panel. The refrigerator according to the first aspect of the invention, wherein the inclined portion of the refrigerator main body in front of the machine room is formed on the machine room side corresponding to a compressor of a refrigeration cycle disposed in the machine room The bulging portion that bulges on the opposite side forms a bulging shape portion corresponding to the bulging portion on a portion of the heat insulating mat on the side of the bulging portion. The refrigerator according to the first aspect of the invention, wherein an elastic body that protrudes toward the vacuum heat insulating panel side is provided on an inclined surface of the inner box that constitutes an inclined portion of the refrigerator main body in front of the machine room. The refrigerator according to the first aspect of the invention, wherein a convex forming portion that protrudes toward the vacuum heat insulating panel side is provided on an inclined surface of the inner box that constitutes an inclined portion of the refrigerator main body in front of the machine room.