JP2021047008A - refrigerator - Google Patents

Abstract

To improve heat insulation performance of a refrigerator body and realize the structure in a relatively simple form.SOLUTION: A refrigerator of the invention has a refrigerator body in which a heat insulation wall body is sandwiched between an inner box and an outer box. The refrigerator includes: a back surface heat insulation panel provided on a back surface of the heat insulation wall body; a bottom surface heat insulation panel provided on a bottom surface of the heat insulation wall body; a separation part provided between the back surface heat insulation panel and the bottom surface heat insulation panel; and connection means which passes through the separation part. In the separation part, the bottom surface heat insulation panel contacts with the inner box and protrudes so as to separate from the outer box. A foam heat insulation material is provided between the bottom surface heat insulation panel and the back surface heat insulation panel.SELECTED DRAWING: Figure 20

Description

The present invention relates to a refrigerator configured to use a heat insulating panel as a heat insulating wall of the refrigerator body.

An example of this type of refrigerator is described in Patent Document 1. In this refrigerator, a vacuum heat insulating panel is arranged in the space between the inner box and the outer box, and urethane foam is filled. That is, the heat insulating wall of the refrigerator body is configured by using a vacuum heat insulating panel and urethane foam in combination.

JP-A-2002-90048

In the case of the above configuration, since the vacuum heat insulating panel and urethane foam are used together, the heat insulating performance of the urethane foam part is inferior, so that the heat insulating performance can be improved as expected even though the vacuum heat insulating panel is used. There wasn't. For example, since it is necessary to increase the thickness of the heat insulating wall of the urethane foam portion, which is inferior in heat insulating performance, there is a problem that the thickness of the entire heat insulating wall becomes thick. However, even if the heat insulating wall of the refrigerator body is to be composed only of the vacuum heat insulating panel, the shape of the heat insulating wall is complicated, whereas the vacuum heat insulating panel can only be manufactured as a rectangular panel, so the realization is quite considerable. It was difficult. In particular, in the conventional configuration, connection means arranged so as to penetrate the inside and outside of the refrigerator body, such as electrical wiring, a drainage path, or a refrigerant pipe for a refrigeration cycle, is embedded in urethane foam. However, how to arrange these parts with respect to the heat insulating wall body composed of only the vacuum heat insulating panel has been an issue, and it has been quite difficult to realize.

An object of the present invention is to provide a refrigerator in which the heat insulating performance of the refrigerator body can be improved and the structure thereof can be realized relatively easily.

The refrigerator of the present invention is a refrigerator having a refrigerator body having a heat insulating wall sandwiched between an inner box and an outer box, and is provided on a back heat insulating panel provided on the back surface of the heat insulating wall body and on the bottom surface of the heat insulating wall body. A bottom heat insulating panel provided, a separating portion provided between the back heat insulating panel and the bottom heat insulating panel, and a connecting means passing through the separating portion are provided, and in the separating portion, the bottom heat insulating panel is provided. , It is in contact with the inner box and protrudes away from the outer box, and a foam heat insulating material is provided between the bottom heat insulating panel and the back heat insulating panel.

According to the refrigerator of the present invention, the heat insulating performance of the refrigerator body can be improved, and the configuration thereof can be realized relatively easily.

A perspective view of a refrigerator body showing the first embodiment of the present invention. Partial sectional view of the refrigerator body Perspective view of the box-shaped heat insulating wall An exploded perspective view of a box-shaped heat insulating wall Partial sectional view of vacuum insulation panel Longitudinal side view of the bottom of the refrigerator Partial perspective view from the back side of the refrigerator machine room Partial perspective view from the back side of the lower part of the box-shaped heat insulating wall FIG. 8 equivalent diagram in which urethane foam is arranged at the separation portion. An exploded perspective view of the lower part inside the refrigerator body Perspective view of the lower part inside the refrigerator body Longitudinal side view of the part of the refrigerator body where the heat exchange part of the refrigerant pipe is arranged An exploded perspective view showing the heat exchange part of the heat insulating material and the refrigerant pipe. A perspective view showing a state in which the heat exchange portion of the refrigerant pipe is covered with a heat insulating material. Longitudinal side view of the part of the refrigerator body where the drainage path is arranged FIG. 12 corresponding diagram showing a second embodiment of the present invention Figure 10 equivalent FIG. 12 corresponding diagram showing a third embodiment of the present invention FIG. 15 equivalent diagram showing a fourth embodiment of the present invention. FIG. 19 equivalent diagram showing a fifth embodiment of the present invention. FIG. 8 equivalent diagram showing a sixth embodiment of the present invention. Fig. 9 equivalent diagram Top view of vacuum insulation panel FIG. 4 corresponding diagram showing a seventh embodiment of the present invention

Hereinafter, the first embodiment of the present invention will be described with reference to FIGS. 1 to 16. First, FIG. 1 is a perspective view schematically showing the overall configuration of the refrigerator main body 1 of the present embodiment, and FIG. 2 is a partial vertical sectional view of the refrigerator main body 1. The refrigerator body 1 is a box-shaped heat insulating material arranged so as to be sandwiched between an outer box 2 made of a metal plate (steel plate, SUS plate, etc.), an inner box 3 made of resin, and the inner box 3 and the outer box 2. It is composed of a wall body 4.

FIG. 3 is a perspective view showing the overall configuration of the box-shaped heat insulating wall 4 alone. As shown in FIG. 4, the box-shaped heat insulating wall 4 is formed by combining two or more, for example, five vacuum heat insulating panels 5, 6, 7, 8, and 9. Each of the vacuum heat insulating panels 5 to 9 is formed in a substantially rectangular plate shape, and the thickness dimension thereof is, for example, about 10 to 20 mm. The shapes of the vacuum insulation panels 5 and 6 are substantially trapezoidal in which the rear portion of the lower end is cut diagonally, and the shape of the vacuum insulation panel 9 is a shape that is bent in a substantially "dogleg" shape in the middle portion. ing.

When assembling the five vacuum heat insulating panels 5 to 9 in a box shape, the outer box 2 and the inner box 3 are previously bonded to the outer and inner surfaces of the vacuum heat insulating panels 5 to 9 via an adhesive. In this case, the outer box 2 and the inner box 3 are formed to have a size slightly larger than the size of the vacuum heat insulating panels 5 to 9, and the vacuum heat insulating panels 5 to 9 are attached to the upper, lower, left and right ends thereof. A connecting piece for connecting, a cover piece covering the end faces of the vacuum heat insulating panels 5 to 9, and the like are formed.

For example, as shown in FIG. 2, when connecting the two vacuum heat insulating panels 5 and 7, the connecting piece 2a at the upper end of the outer box 2 of the vacuum heat insulating panel 5 and the outer box 2 of the vacuum heat insulating panel 5 are connected. The connecting piece 2b at the left end of the vacuum insulation panel 5 is connected by screwing or welding, and the connecting piece 3a at the upper end of the inner box 3 of the vacuum insulation panel 5 and the left end of the inner box 3 of the vacuum insulation panel 5 are connected. The piece 3b is connected by screwing, welding, or the like. Then, the refrigerator main body 1 shown in FIG. 1 is manufactured by connecting the five vacuum heat insulating panels 5 to 9 in substantially the same manner. In FIG. 2, for the space portion 10 generated in the mating portion (that is, the joint portion) of the two vacuum heat insulating panels 5 and 7, the volume of the space portion 10 should be as small as possible, that is, the vacuum heat insulating panel. It is preferable to design the size and arrangement of both panels 5 and 7 so that the panels 5 and 7 are as close as possible. Further, it is preferable that the space portion 10 is filled with a heat insulating material (not shown) such as urethane foam.

Here, the specific configuration of the vacuum heat insulating panels 5 to 9 will be briefly described with reference to FIG. The vacuum heat insulating panels 5 to 9 are composed of a core material 11 and an outer packaging material 12 made of a metal foil laminated film or the like having a plastic layer for heat welding and having a gas barrier property. The core material 11 is composed of a laminated body 13 of inorganic fibers and an inner bag 14. The inner bag 14 is made of, for example, a bag made of a synthetic resin film such as polyethylene fill having a thickness of 20 μm. Natural fibers such as glass wool, glass fiber, alumina fiber, silica alumina fiber, and genuine cotton are used for the laminate 13 of the inorganic fiber. The core material 11 is a roll-shaped laminate 13 of inorganic fibers made in advance to a thickness of 100 mm to 150 mm, cut to a set size, folded in two or in three, and an inner bag 14 (synthesized of polyethylene having a wall thickness of about 20 μm). After storing in the resin film), the laminate of the inorganic fibers is compressed using a press machine or the like, then the inside of the inner bag 14 is depressurized, and then the opening of the inner bag 14 is heated by using a heat welding machine. It is made by welding and sealing. The thickness of the laminate 20 of the inorganic fibers 20 was, for example, 200 to 300 mm in the state of raw cotton before the compression step (decompression step), but it is compressed to, for example, about 8 to 15 mm by the compression (decompression) step. To.

When the core material 11 having the above-described configuration is housed in the outer packaging material 12 (metal foil laminated film), the inside of the outer packaging material 12 is depressurized and welded and sealed, the configuration shown in FIG. 7A is obtained. The outer packaging material 12 is made of a plastic-metal leaf laminated film, and when the opening of the outer packaging material 12 is welded and sealed, the plastic portion is melted and welded.

Finally, in the vacuum heat insulating panels 5 to 9 produced in this way, the selvage portion 12a including the selvage portion 14a of the inner bag 14 is placed on the upper surface side with the base of the selvage portion as the base point as shown in FIG. 5B, for example. It is fixed with a folding tape or the like (not shown). In this case, since the end portion of the core material 11 is rounded, the selvage portion 12a is folded along the roundness, and the selvage portion 12a can be folded in without forming a convection space between the selvage portion 12a and the outer packaging material 12. As a result, the formation of a heat convection space conventionally added to the heat transfer conducted through the metal portion (barrier layer) of the outer packaging material 12 of the vacuum heat insulating panels 5 to 9 can be suppressed to a minimum.

The vacuum heat insulating panels 5 to 9 having the above configuration can be bent. In the case of the present embodiment, the vacuum heat insulating panel 9 corresponding to the bottom plate portion and the lower portion of the back surface portion of the refrigerator main body 1 is bent so as to have a substantially “dogleg” cross section.

As shown in FIG. 6, a cooler 15 for cooling the inside of the refrigerator and a fan device 16 for cooling are arranged inside the refrigerator body 1, and these coolers 15 and a fan are provided. The device 16 is covered with a cover 17. A defrost heater (not shown) is arranged in the vicinity of the cooler 15, and a water receiving portion 19 for receiving defrost water is arranged below the cooler 15. Inside the refrigerator main body 1, a partition wall 20 and a partition plate (not shown) that partition the inside of the refrigerator into a plurality of rooms (freezing room, refrigerating room, vegetable room, etc.) are arranged.

Further, in the outside of the refrigerator body 1, particularly in the lower machine room 21, as shown in FIG. 7, a compressor 22, an evaporating dish 23, a fan device 24 for heat dissipation, and defrosting are provided. An evaporating dish 25 for evaporating water and a control board 26 are arranged.

Then, as shown in FIGS. 6 and 8, both panels 8 and 9 are at a predetermined distance (for example, about several cm) at the joint portion of the two adjacent vacuum heat insulating panels 8 and 9 on the back surface of the refrigerator body 1. Separated separation portions 27 are provided. A connecting means 28 arranged so as to penetrate the inside and outside of the refrigerator body 1 is arranged in the separating portion 27. In this case, as the connecting means 28, an electric wiring 29, a drainage path 30, and a refrigerant pipe 31 for connecting the refrigeration cycle are arranged. Further, as shown in FIG. 9, the separating portion 27 is provided with, for example, urethane foam 32 as an effervescent heat insulating means.

The electric wiring 29 connects various electric parts (fan device 16, defrosting, etc.) inside the refrigerator to the control board 26 outside the refrigerator. In the drawing, the electric wiring 29 has a pipe shape covering a bundle of electric wirings. Wiring cover is shown. The drainage path 30 is composed of a drainage pipe connected to the bottom of the water receiving portion 19 inside the refrigerator, and this drainage pipe extends vertically outside the refrigerator, and the lower end thereof is inside the evaporating dish 25 outside the refrigerator. It is arranged so as to face. The defrosted water in the water receiving portion 19 is sent into the evaporating dish 25 through the drainage path 30. The refrigerating cycle refrigerant pipe 31 is configured by joining a thin inlet connecting pipe 31a (see FIG. 7) connected to the inlet of the cooler 15 and a thick outlet connecting pipe 31b connected to the outlet of the cooler 15. ing. As shown in FIG. 7, the inlet connecting pipe 31a and the outlet connecting pipe 31b are branched outside the refrigerator, the outlet connecting pipe 31b is connected to the input portion of the compressor 22, and the inlet connecting pipe 31a constitutes a refrigerating cycle. It is connected to a part (not shown).

As shown in FIG. 10, the refrigerant pipe 31 has a heat exchange portion 33 formed by winding a refrigerant pipe having a length of about 3 m in an elongated coil shape. In the heat exchange unit 33, heat exchange is executed between the high temperature refrigerant flowing through the inlet connecting pipe 31a and the low temperature refrigerant flowing through the outlet connecting pipe 31b. The heat exchange unit 33 is arranged on the right side of the cooler 15 on the rear surface of the refrigerator body 1.

Then, as shown in FIGS. 10 and 11, the heat exchange portion 33 of the refrigerant pipe 31 is covered with the heat insulating material 34. As shown in FIGS. 13 and 14, the heat insulating material 34 is formed with a recess 33a for accommodating the heat exchange portion 33 and a recess 33b for accommodating the electric wiring 29, and the heat exchange portion 33 and the electric wiring are formed. 29 is housed in the recesses 33a and 33b of the heat insulating material 34 and covered with the heat insulating material 34. That is, the connecting means 28 (heat exchange unit 33 and electrical wiring 29) is covered with a heat insulating material 34 inside the refrigerator body 1. FIG. 12 is a vertical sectional side view around the heat insulating material 34.

Further, FIG. 15 is a vertical cross-sectional view showing the drainage path 30 arranged in the separation portion 27 and the water receiving portion 19. As shown in FIG. 15, the drainage path 30 is led out obliquely downward from the lower part of the water receiving portion 19, inserted into the separating portion 27, and covered with the urethane foam 32 disposed in the separating portion 27. There is.

According to the present embodiment having the above configuration, the box-shaped heat insulating wall 4 sandwiched between the inner box 3 and the outer box 2 is configured by combining two or more vacuum heat insulating panels 5 to 9, so that the vacuum heat insulating panel and the vacuum heat insulating panel are used. The heat insulating performance can be improved as compared with the configuration in which urethane foam is used in combination. Then, the connecting means, specifically, the connecting means arranged so as to penetrate the inside and the outside of the refrigerator main body 1 in the separating portion 27 provided at the joint portion of the two adjacent vacuum heat insulating panels 8 and 9. , Electrical wiring 29, drainage path 30, and refrigerant pipe 31 were arranged. Thereby, the refrigerator main body 1 in which the box-shaped heat insulating wall 4 is formed by combining two or more vacuum heat insulating panels 5 to 9 can be realized relatively easily.

Further, in the above embodiment, since the urethane foam 32 is arranged in the separating portion 27, the heat insulating performance of the separating portion 27 can be maintained sufficiently high. Further, in the above embodiment, since the heat exchange portion 33 of the refrigerant pipe 31 is covered with the heat insulating material 34 in the refrigerator main body 1, the temperature of the heat exchange portion 33 is higher than the temperature inside the refrigerator. Even if this happens, it is possible to prevent the heat from the heat exchange unit 33 from leaking into the refrigerator as much as possible.

16 and 17 show a second embodiment of the present invention. The same components as those in the first embodiment are designated by the same reference numerals. In the second embodiment, the inner box 3 is provided with a convex portion 36 projecting into the refrigerator, and the heat exchange portion 33 of the refrigerant pipe 31 and the electrical wiring 29 (that is, the connecting means) are arranged inside the convex portion 36. Then, the heat exchange unit 33 and the electrical wiring 29 were arranged between the inner box 3 and the vacuum heat insulating panel 8. Then, the convex portion 36 of the inner box 3 is covered with the heat insulating material 34.

The configuration of the second embodiment other than the above is the same as the configuration of the first embodiment. Therefore, even in the second embodiment, substantially the same effect as that in the first embodiment can be obtained.

FIG. 18 shows a third embodiment of the present invention. The same components as those in the second embodiment are designated by the same reference numerals. In the third embodiment, as shown in FIG. 18, a convex portion 37 slightly larger than the convex portion 36 is provided on the inner box 3, and a heat insulating material 34 is provided between the inner surface of the convex portion 37 and the heat exchange portion 33. Was configured to be arranged. The configuration of the third embodiment other than the above is the same as the configuration of the second embodiment. Therefore, even in the third embodiment, substantially the same effect as that in the second embodiment can be obtained.

FIG. 19 shows a fourth embodiment of the present invention. The same components as those in the first embodiment are designated by the same reference numerals. In this fourth embodiment, as shown in FIG. 19, the separating portion 27 of the two vacuum insulating panels 8 and 9 arranged so as to be vertically adjacent to each other on the back surface of the refrigerator main body 1 is provided with the upper vacuum insulating panel. It was arranged directly below the water receiving portion 19 arranged along the front surface of 8. Then, the drainage path 30 was arranged so as to extend straight downward from the bottom of the water receiving portion 19.

The configuration of the fourth embodiment other than the above is the same as the configuration of the first embodiment. Therefore, even in the fourth embodiment, substantially the same effect as that in the first embodiment can be obtained. In particular, according to the fourth embodiment, the drainage path 30 is arranged so as to extend straight downward from the bottom of the water receiving portion 19, so that the defrosted water flows more smoothly in the drainage path 30. Become. Moreover, the length dimension of the drainage path 30 can be shortened.

FIG. 20 shows a fifth embodiment of the present invention. The same components as those in the fourth embodiment are designated by the same reference numerals. In the fifth embodiment, as shown in FIG. 20, the lower end portion of the vacuum heat insulating panel 8 is extended downward, and the drainage path 30 is arranged along the front surface of the lower end portion of the extended vacuum heat insulating panel 8. .. Then, urethane foam 32 was arranged in the separating portion 27 as shown in the figure. The configuration of the fifth embodiment other than the above is the same as the configuration of the fourth embodiment. Therefore, even in the fifth embodiment, substantially the same effect as that in the fourth embodiment can be obtained. In particular, according to the fifth embodiment, the lower end portion of the vacuum heat insulating panel 8 is extended downward, the drainage path 30 is arranged along the front surface of the extended portion, and the urethane foam 32 is arranged at the separating portion 27. Since it is provided, the heat insulating performance of the separation portion 27 can be further improved.

21 to 23 show a sixth embodiment of the present invention. The same components as those in the first embodiment are designated by the same reference numerals. In the sixth embodiment, instead of the vacuum heat insulating panel 9, as shown in FIG. 23, for example, a C-plane shaped portion is formed as an inclined portion having a shape that is diagonally chipped at the corner portion of the end portion of the vacuum insulating panel 38 on the joint side. The vacuum insulation panel 38 on which 38a was formed was used. As shown in FIG. 21, the C-plane shaped portion 38a was designated as a separating portion 39. Then, as shown in FIG. 22, an electric wiring 29, a drainage path 30, and a refrigerant pipe 31 are arranged in the separation portion 39.

When forming the C-plane shaped portion 38a on the vacuum heat insulating panel 38, it is preferable to form the C-plane shaped portion 38a by deforming the core material when compressing the core material of the vacuum heat insulating panel. Of course, the C-plane shaped portion 38a may be formed by another method. Further, the area of the selvage portion 12a of the outer packaging material 12 of the vacuum heat insulating panel in the portion where the C-plane shape portion 38a is formed is larger than the area of the selvage portion 12a in the other portion. 12a is also bent and bonded along the slope of the C-plane shaped portion 38a.

The configuration of the sixth embodiment other than the above is the same as the configuration of the first embodiment. Therefore, even in the sixth embodiment, substantially the same effect as that in the first embodiment can be obtained. In particular, in the sixth embodiment, the C-plane shaped portion 38a of the vacuum heat insulating panel 38 is used as the separating portion 39, and the electrical wiring 29, the drainage path 30, and the refrigerant pipe 31 are arranged in the separating portion 39. The size of the vacuum insulation panels 8 and 38 can be reduced, and the insulation performance of the joint portions of the vacuum insulation panels 8 and 38 can be further improved.

FIG. 24 shows a seventh embodiment of the present invention. The same components as those in the first embodiment are designated by the same reference numerals. In this seventh embodiment, the box-shaped heat insulating wall 4 is configured by combining two vacuum heat insulating panels 40 and 41 as shown in FIG. 24. The vacuum heat insulating panel 40 is a panel in which the cross-sectional shape is formed in a "U" shape, and the left and right side wall portions and the ceiling wall portion of the box-shaped heat insulating wall body 4 are integrated. The vacuum heat insulating panel 41 is a panel that is bent at obtuse angles at two places and integrates the back wall portion and the bottom wall portion of the box-shaped heat insulating wall body 4.

Of the vacuum heat insulating panel 41, the portion corresponding to the lower part of the back wall portion of the box-shaped heat insulating wall 4 is formed so that the length dimension in the left-right direction is shorter than the other portions. As a result, when the box-shaped heat insulating wall 4 is formed by combining the two vacuum heat insulating panels 40 and 41, the separating portions 42 are formed on both side portions of the lower portion of the back wall portion of the box-shaped heat insulating wall 4. To. An electric wiring 29, a drainage path 30, and a refrigerant pipe 31 are arranged in the separation portion 42.

The configuration of the seventh embodiment other than the above is the same as the configuration of the first embodiment. Therefore, even in the seventh embodiment, substantially the same effect as that in the first embodiment can be obtained. In particular, in the seventh embodiment, since the box-shaped heat insulating wall 4 is formed by combining the two vacuum heat insulating panels 40 and 41, the heat insulating performance can be improved because the number of joints is reduced. Further, since the number of parts is reduced, the management of parts becomes easy. The vacuum heat insulating panels 40 and 41 having the above-mentioned shapes can be actually manufactured.

Further, in each of the above-described embodiments, the heat exchange portion 33 of the refrigerant pipe 31 as a connecting means is arranged inside the refrigerator main body 1, but instead, it is arranged outside the refrigerator (for example, in the machine room). It may be installed and covered with a heat insulating material.

In the drawing, 1 is the refrigerator body, 2 is the outer box, 3 is the inner box, 4 is the box-shaped heat insulating wall, 5, 6, 7, 8 and 9 are the vacuum heat insulating panels, 11 is the core material, and 12 is the outer packaging material. 15 is a cooler, 16 is a fan device, 19 is a water receiver, 21 is a machine room, 22 is a compressor, 23 is a radiator, 24 is a fan device, 25 is an evaporating dish, 26 is a control board, and 27 is a separation part. 28 is a connecting means, 29 is an electric wiring, 30 is a drainage path, 31 is a refrigerant pipe, 32 is a urethane foam (foam insulation means), 33 is a heat exchange part, 34 is a heat insulating material, 36 is a convex part, and 37 is a convex part. , 38 indicate a vacuum insulation panel, 39 indicates a separation portion, 40 and 41 indicate a vacuum insulation panel, and 42 indicates a separation portion.

Claims (6)

In a refrigerator having a refrigerator body with a heat insulating wall sandwiched between the inner box and the outer box,
A back heat insulating panel provided on the back surface of the heat insulating wall body and
A bottom heat insulating panel provided on the bottom surface of the heat insulating wall and
A separation portion provided between the back heat insulating panel and the bottom heat insulating panel,
The connecting means passing through the separating portion and
With
At the separation portion, the bottom heat insulating panel is in contact with the inner box and protrudes away from the outer box.
A refrigerator in which a foam heat insulating material is provided between the bottom heat insulating panel and the back heat insulating panel. The refrigerator according to claim 1, wherein the back heat insulating panel is close to the left and right corners of the inner box. The refrigerator according to claim 1 or 2, wherein the bottom heat insulating panel has a portion corresponding to the machine room bent inward. The refrigerator according to claim 3, wherein the connecting means is introduced into the machine room through the separating portion. The connecting means has a refrigerant pipe and
The refrigerator according to any one of claims 1 to 4, wherein the refrigerant pipe is wound in front of the back heat insulating panel. The connecting means has a drainage route and has a drainage route.
The refrigerator according to any one of claims 1 to 5, wherein the drainage route extends in the vertical direction.

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