JP6510103B2 - refrigerator - Google Patents

Description

  Embodiments of the present invention relate to a refrigerator.

  In recent years, for example, household refrigerators have a tendency to increase the internal volume, and it is attempted to reduce the thickness of the peripheral wall of the heat insulation box regardless of the enlargement of the heat insulation box that is the refrigerator main body. There is. In this case, it is necessary to secure sufficient heat insulation performance even with the thin peripheral wall, and for that reason, in addition to filling the peripheral wall of the heat insulation box with the foamable heat insulating material, the heat insulation performance compared to the foamable heat insulation panel It is practiced to use a vacuum insulation panel, which is a high thermal insulation panel (low thermal conductivity), and there are also cases in which the peripheral wall of the insulation box is filled only with the vacuum insulation panel (for example, patent documents 1, 2).

  The vacuum insulation panel is made of, for example, glass wool which is a cotton-like thin glass fiber as a mat material to form a core material, and the core material is put in a gas barrier container made of aluminum foil and a synthetic resin laminated film, and the inside is vacuumed. A panel that holds the inside of the container in a vacuum reduced pressure state by exhausting and closing the opening, and has a low thermal conductivity (high thermal insulation) even if it is thin. High thermal insulation can be retained in the peripheral wall of

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

The refrigeration cycle of a refrigerator requires many pipes such as condenser pipes, capillary tubes and suction pipes. Among them, there is a relationship in which the evaporator is disposed in the storage space which is the inside of the heat insulation box, such as a capillary tube connecting the condenser pipe and the evaporator (cooler) and a suction pipe connecting the evaporator and the compressor. Then, when the storage space is drawn around, the substantial internal volume of the storage space is narrowed, and the storage volume of the food is reduced.
Then, the refrigerator which can prevent that the storage space of a heat insulation box is narrowed by piping is provided.

  The refrigerator according to the present embodiment is a refrigerator having a heat insulating box with an internal space as a storage space as a refrigerator main body, and vacuum heat insulating is performed at least inside the left side wall, the right side wall and the back wall of the heat insulating box. A panel is provided, and a pipe provided between the adjacent vacuum heat insulation panels which is inside a corner of the heat insulation box and is separated from an end of the vacuum heat insulation panel, and outside the storage space And a member provided inside the chamfered portion of the heat insulation box for separating the pipe from the end of the vacuum heat insulation panel, and a heat insulating material provided inside the wall of the heat insulation box and covering the pipe Prepare.

Partial cross-sectional view of the heat insulation box showing the first embodiment Side view of insulation rod The perspective view which looked at the heat insulation box from the front side The perspective view which looked at the heat insulation box from the back side An exploded perspective view of the heat insulation box A vacuum heat insulation panel is shown, (a) is an exploded perspective view, (b) is a sectional view FIG. 1 equivalent view showing a second embodiment Partial longitudinal sectional view showing the third embodiment 4 equivalent figure which shows 4th Embodiment Figure 1 equivalent

  Several embodiments will be described with reference to the drawings. In addition, the front and back, right and left of a refrigerator set the door side of a refrigerator as "front side", and the right side at the time of looking at a refrigerator facing a door is demonstrated as "right side."

First Embodiment
The first embodiment will be described with reference to FIGS. FIG. 3 and FIG. 4 show the heat insulating box 1 constituting the refrigerator main body. The heat insulation box 1 is constituted by providing a vacuum heat insulation panel 4 described later as a heat insulation panel between the outer case 2 and the inner case 3 and as a whole, it has a rectangular parallelepiped long box shape whose front face is opened. As the storage space 5.

  In the present embodiment, as shown in FIG. 5, the heat insulating box 1 has peripheral walls, that is, the ceiling wall 1a, the bottom wall 1b, the left side wall 1c, the right side wall 1d, and the back wall 1e. It manufactures separately and is comprised by combining the wall part (heat insulation wall part) 1a-1e of these plurality (this embodiment five pieces). In this case, the bottom wall 1b excluding the ceiling wall 1a, the left side wall 1c, the right side wall 1d, and the back wall 1e are rectangular flat plates, and only the ceiling wall 1a is stepped with its rear portion lowered one step. It is shaped. Due to the stepped shape of the ceiling wall portion 1a, when combined as the heat insulation box 1, a machine room 6 in which a compressor or the like of a refrigeration cycle is disposed is formed at the upper rear of the heat insulation box 1. .

  Here, the configuration of each of the wall portions 1a to 1e will be described. First, the heat insulation function of each wall 1 a to 1 e is obtained by the vacuum heat insulation panel 4. As shown in FIG. 6 (a), this vacuum insulation panel 4 is made of, for example, glass wool which is a cotton-like thin glass fiber in a mat shape to form a core 7, and the core 7 is an aluminum foil and a synthetic resin. The inside of the gas barrier container 8 is put in a bag made of laminate film, and the inside is evacuated to close the opening, thereby maintaining the inside of the gas barrier container 8 in a vacuum reduced pressure state.

  As shown in FIGS. 6 (a) and 6 (b), each wall 1a to 1e has a vacuum heat insulating panel 4 between a metal shell 9 such as a steel plate and a plastic inner shell 10, for example. The outer shell 9 and the vacuum heat insulation panel 4, and the vacuum heat insulation panel 4 and the inner shell 10 are fixedly integrated by adhesion or the like. In addition, although shown as a flat-shaped wall part in FIG. 6, of course, the ceiling wall part 1a is made into a stepped shape.

  In each of the wall portions 1a to 1e, the inner shell 10 is smaller than the outer shell 9 in the vertical and horizontal dimensions, and the vacuum insulation panel 4 is smaller than the inner shell 10 in the vertical and horizontal dimensions. Therefore, the longitudinal ends and the lateral ends of the vacuum insulation panel 4 do not reach the longitudinal ends and the lateral ends of the outer shell 9 and are located inward of the longitudinal ends and the lateral ends of the outer shell 9. ing. Further, a connecting piece 11 is bent at a right angle at a predetermined end of the outer shell 9 of the required wall portion among the wall portions 1a to 1e. The connection piece 11 is for connecting the outer shells 9 of adjacent wall portions with each other by a screw or the like.

  And by combining each wall part 1a-1e, the said outer case 2 is comprised by the outer shell 9 of each wall part 1a-1e, and while the said inner case 3 is comprised by the inner shell 10, these outer Between the box 2 and the inner box 3, the heat insulation box 1 which comprises the vacuum heat insulation panel 4 which is a heat insulation panel having high heat insulation performance (low heat conductivity) compared to the urethane foam is formed.

  FIG. 1 is a cross-sectional view of a right angle rear portion of the right rear portion of the heat insulation box 1, showing a connection portion between the right side wall 1d and the back wall 1e. In addition, in order to distinguish the thing of back wall part 1e and the thing of right side wall part 1d about vacuum heat insulation panel 4, outer shell 9, and inner shell 10, the thing of back wall part 1e is attached with "e". The right side wall 1d is indicated by a letter "d".

  As shown in FIG. 1, the connection piece 11 is provided at the rear end of the right side wall portion 1d, but the connection piece is not provided at the right end of the outer shell 9e of the back wall portion 1e, The connection piece 11 of the right side wall 1d is in contact with the right end of the outer shell 9e of the back wall 1e from the inner surface side. The right end of the inner shell 10e of the back wall 1e is abutted against the rear end surface of the inner shell 10d of the right side wall 1d. And the connection piece 11 of the right side wall part 1c and the right end part of the outer shell 9e of the back wall part 1e are fastened by the screw which is not shown in figure. The right end of the inner shell 10e of the back wall 1e and the inner shell 10d of the right wall 1d are sealed and connected by a sealing agent or a corner member having a triangular cross section.

  As shown in FIG. 3, on the front of the heat insulation box 1, three horizontal frames 12 to 14 dividing the front in the vertical direction are attached, and a middle horizontal frame 13 and a lower horizontal frame 14 A vertical frame 15 is attached between the two. And although illustration is not carried out, the heat insulation wall or a partition plate is provided in the back side of the horizontal frames 12-14, and the rear side of the vertical frame 15, The storage space 5 is an order from the top by these heat insulation walls and a partition plate. It is divided into a cold storage room 5a, a vegetable room 5b, an ice making room 5c arranged in the lateral direction, a specification switching room 5d, and a freezing room 5e.

  The refrigerator in the present embodiment is provided with two evaporators (chillers) for refrigeration and refrigeration, the evaporator for refrigeration is disposed in a cooling chamber formed at the back of the refrigerator compartment 5a, and the evaporator for refrigeration is It is arrange | positioned in the cooling chamber formed in the back part of the freezer compartment 5e. Then, cold air cooled by two evaporators is blown by a fan to the cold storage room 5a, the vegetable room 5b, the ice making room 5c, the specification switching room 5d, and the freezing room 5e arranged in the lateral direction. Configured to be cooled.

  The condenser pipe 16 for liquefying the refrigerant compressed by the compressor is disposed on the inner surface (the surface on the vacuum heat insulation panel 4 side) of the shell 9 of all or part of the wall portions 1a to 1e of the heat insulation box 1 It is attached, and the outer shell 9 is used as a heat sink to discharge condensation heat. Further, a part of the condenser pipe 16 is disposed as a dew protection pipe 16 a on the periphery of the front opening of the heat insulation box 1, on the back of the horizontal frames 12 to 14 and the vertical frame 15. , And the horizontal frames 12 to 14 and the vertical frame 15 are heated to prevent dew from adhering.

  The refrigerant condensed by the condenser pipe 16 is supplied to each of the evaporators for refrigeration and freezing via the two capillary tubes 17 for refrigeration and freezing shown in FIG. 1, and the refrigerant evaporated in each evaporator is similarly shown in FIG. The air is drawn into the compressor via suction pipes 18, 19 shown in FIG. The capillary tube 17 and the suction pipes 18 and 19 are outside the storage space 5 in the heat insulation box 1, and in the present embodiment, inside the wall parts 1a to 1e of the heat insulation box 1, for example, right side wall 1d and back wall 1e On the inside of the right rear side of the heat insulation box 1 which is a connection part with the inside (the inside of the depression angle of the heat insulation box 1 where the right wall 1d and the end of the back wall 1e intersect) ing.

  The capillary tube 17 and the suction pipes 18, 19 are disposed behind the vacuum heat-insulation panel 4d of the right side wall portion 1d, if the arrangement positions of the capillary tube 17 and the suction pipes 18, 19 are in relation to the vacuum heat-insulation panels 4d, 4e. On the extension (outside) of the end (end on the piping arrangement side), it is inside the end of the outer box 2 (outer shell 9d of the right side wall 1d) and the right end of the vacuum insulation panel 4e of the back wall 1e It is arrange | positioned inside the end (connection piece 11 of right side wall 1d) on the extension (outside) of (the end by the side of piping arrangement).

  The rear end of the vacuum heat insulation panel 4d of the right side wall 1d and the right end of the vacuum heat insulation panel 4e of the back wall 1e are the end of the right side wall 1d (connection piece 11 which is the rear end of the outer shell 9d) and the back wall Since it does not reach the end of the portion 1e (the right end of the outer shell 9e) and is inside of it, a space exists between the vacuum insulation panels 4d and 4e, and the capillary tube 17 and the suction pipe are in that space. 18, 19 can be arranged.

  In this case, a rectangular rod-shaped heat insulating member 20 having rigidity, for example, made of foamable plastic, is accommodated inside the right angle rear side of the heat insulation box 1, and the two suction pipes 18, 19 The capillary tube 17 is inserted into a groove 20 a formed in the rod-shaped heat insulating member 20. Further, a sponge-like heat insulating material 21 is filled, for example, between the rod-shaped heat insulating member 20 and the right end of the vacuum heat insulating panel 4 e of the back wall 1 e. Therefore, the two suction pipes 18 and 19 and the capillary tube 17 are thermally insulated by the rod-like heat insulating member 20 and the sponge-like heat insulating material 21.

  However, in the present embodiment, the inner shell 10d of the right side wall 1d is elongated, and the space formed on the rear side of the vacuum heat insulation panel 4d in the right side wall 1d and the vacuum in the back wall 1e The space formed on the right side of the heat insulation panel 4e is configured as divided by the inner shell 10d of the right side wall 1d, and the capillary tube 17 and the suction pipes 18, 19 housed in the rod-like heat insulation member 20 are It is as if it was arrange | positioned in the space which arose on the back side of the vacuum heat insulation panel 4d in the right side wall part 1d.

  The rod-shaped heat insulating member 20 is formed in a rectangular cross section having a size that fills the space between the rear end of the vacuum heat-insulation panel 4 d of the right side wall 1 d and the connecting piece 11 of the outer shell 9 d. The length is set to the length dimension from the lower end of the right side wall 1 d to the lower step portion of the rear of the ceiling wall 1 a.

  The assembly of the suction pipes 18, 19 and the capillary tube 17 inside the wedge portion on the right rear side of the heat insulation box 1 is performed as follows. In addition, this assembling method is an example and is not limited to this. First, the capillary tube 17 and the suction pipes 18 and 19 are inserted into the groove 20 a of the rod-shaped heat insulating member 20 to be united (integrated) with the rod-shaped heat insulating member 20. In this case, the capillary tube 17 and the suction pipes 18, 19 and the rod-like heat insulating member 20 may be fixed by an adhesive in order to integrate them more firmly. Then, as shown in FIG. 2, the upper end portions of the capillary tube 17 and the suction pipes 18 and 19 are projected upward from the upper end of the rod-shaped heat insulating member 20 by a required length, and the lower ends of the suction pipes 18 and 19 and the capillary tube 17 In accordance with the arrangement position of the evaporator in the heat insulation box 1, and is projected laterally from the middle part of the rod-shaped heat insulation member 20 by a required length.

  Next, the rod-shaped heat insulating member 20 is bonded to the inner surface of the outer shell 9d of the right side wall 1d in contact with the connection piece 11 at the rear end, and then the vacuum heat insulating panel 4 is attached to the inner surface of the outer shell 9d The rear end of the heat insulating panel 4 is bonded in contact with the rod-shaped heat insulating member 20, and finally the inner shell 10 is bonded to the vacuum heat insulating panel 4. At this time, one end side of the suction pipes 18 and 19 and the capillary tube 17 is made to project outward from a notch (not shown) formed in the inner shell 9d.

  The capillary tube 17 and the suction pipes 18 and 19 integrated with the rod-like heat insulating member 20 are accommodated inside the right rear end corner of the heat insulating box 1 by connecting the right side wall 1d and the back wall 1e. It will be in the Thereafter, when the ceiling wall portion 1a is combined with the right side wall portion 1d and the back wall portion 1e, the capillary tube 17 and the suction pipes 18, 19 projecting upward from the upper end of the rod-shaped heat insulating member 20, ie, the upper end of the right side wall portion 1d. Is introduced into the machine room 6 through a through hole (not shown) formed in the ceiling wall 1a.

  The capillary tube 17 introduced into the machine room 6 is connected to the end of the condenser pipe 16 via a three-way valve disposed in the machine room 6, and the two suction pipes 18, 19 are connected to the compressor via joints. Connected to the inlet. Then, the liquid refrigerant from the condenser pipe 16 is supplied to the evaporator for refrigeration and the evaporator for refrigeration by the action of the three-way valve, and the refrigerant evaporated by both evaporators is sucked into the compressor via the suction pipes 18 and 19. Become.

As described above, according to the present embodiment, since the capillary tube 17 and the suction pipes 18 and 19 that are pipes are disposed outside the storage space 5, storage is different from the case where the pipes are disposed inside the storage space 5. The narrowing of the space 5 for piping is prevented as much as possible, and the storage space 5 can be widely used for storing food.
Further, although a low temperature refrigerant flows through the suction pipes 18 and 19, in the present embodiment, since the capillary tubes 17 and the suction pipes 18 and 19 are covered with the heat insulating members 20 and 21, condensation is prevented. be able to.

Further, since the capillary tube 17, the suction pipes 18, 19 and the foamable heat insulating material 20 are unitized, they can be handled easily at the time of assembly or the like. In addition, since the foamable heat insulating material 20 has rigidity, it is easier to handle than the case where it is soft, and the operation of storing the capillary tube 17 and the suction pipes 18 and 19 in the groove 20a can be easily performed. .
Further, since the heat insulation box 1 is configured by combining a plurality of wall portions 1a to 1e, the capillary tube 17, the suction pipes 18, 19 in the joint portion (the corner portion) between the right side wall portion 1d and the back wall portion 1e. The task of storing the This is particularly effective when the left and right wall portions 1c and 1d have a wall thickness of 35 mm or less, and in the present embodiment, the vacuum insulation panel 4 is approximately 20 mm and the total thickness of the outer shell 7 and the inner shell 8 is approximately 1.2. The total thickness is 5 mm, and 21.5 mm in total, and the thickness of the left and right wall portions 1c, 1d is configured with a further effective thickness of 25 mm or less.

Second Embodiment
FIG. 7 shows a second embodiment. The difference between this embodiment and the first embodiment is in the arrangement of the capillary tube 17 and the suction pipes 18 and 19. That is, in this embodiment, the grooves 20a of the cross-sectionally rectangular rod-shaped heat insulating member 20 are formed diagonally from the corner of the inner box 3 to the corner of the outer box 2, and a plurality of pipes are formed in the groove 20a. In the case of the present embodiment, a total of four pipes of two capillary tubes 17 and suction pipes 18 and 19 are provided side by side.

  Thus, the suction pipes 18 and 19 are compared with the thickness of the vacuum heat insulation panel 4 by arranging the suction pipes 18 and 19 which are thicker than the capillary tube 17 diagonally on the corner of the heat insulation box 1. Even if it is thick, it can be accommodated in the corner of the heat insulation box 1.

Third Embodiment
FIG. 8 shows a third embodiment. The difference between this embodiment and the first embodiment is that the suction pipes 18, 19 are not disposed inside the chamfered portion where the two walls intersect, but one end of the wall, specifically, For example, it is disposed at the inside of the front end of the bottom wall 1b.
That is, the vacuum heat insulation panel 4b of the bottom wall 1b does not reach the connection piece 11 (the end of the outer box 2) formed by bending the front end upward at the front end of the outer shell 9b. Between the connection piece 11 and the front end of the vacuum heat insulation panel 4 and the rod-like heat insulation member 22 is disposed. The suction pipes 18 and 19 are inserted together with the capillary tube 17 in the groove 22 a formed in the rod-like heat insulating member 22.

Fourth Embodiment
9 and 10 show a fourth embodiment. In this embodiment, the capillary tube 17 and the suction pipes 18 and 19 are disposed outside the storage space 5, specifically, outside the outer case 2 of the heat insulation box 1.
That is, as shown in FIG. 9, a covering member 23 is attached to the outside of, for example, the corner at the rear right side of the heat insulation box 1. As shown in FIG. 10, the covering member 23 has an L-shaped cross section in which the two surface portions 23a and 23b intersect at right angles, and the tips of the two surface portions 23a and 23b are curved inward to form each surface portion 23a , 23b are in the shape of a container in cross section.

A foamable heat insulating material 24 is filled inside the respective surface portions 23a and 23b, and a groove 24a is formed on one surface portion 23b side of the foamable heat insulating material 24, and two grooves 24a are formed in the groove 24a. The suction pipes 18 and 19 are housed together with the capillary tube 17.
Each surface portion 23a. Recesses 25 are formed intermittently in the vertical direction in 23 b. Then, the self tapping screw 26 is passed through the concave portion 25 of one surface portion 23a, and the self tapping screw 26 is passed through the through hole (not shown) formed in the outer shell 9 of the back wall portion 1e The cover member 23 is threaded by screwing the self-tapping screw 26 into the recess 25 of the other surface 23b while screwing the self-tapping screw 26 into the outer shell 9d of the right side wall 1d. The heat insulation box 1 is fixed to the outside of the right corner of the right rear.

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

For example, the heat insulation wall may be filled between the inner shell and the outer shell with a vacuum insulation panel and a foam insulation filled inside or outside the vacuum insulation panel.
The heat insulation box may be configured by combining an outer box formed in a box shape in advance and an inner box formed in a box shape in advance. In this case, a vacuum insulation panel is disposed between the outer box and the inner box by pasting the vacuum insulation panel on the inner surface of the outer box or the outer surface of the inner box before combining the outer box and the inner box. Do.
When piping is provided inside walls 1a to 1e, the right end and the right side wall of the vacuum heat insulation panel 4e of the back wall 1e as well as the inside of the corner forming the connecting part of the two walls, for example It may be provided in the space between 1d and the inner shell 10d.
The rod-shaped heat insulating members 20 and 22 may be in the form of soft sponge.
Piping is not limited to capillary tubes and suction pipes.

  In the drawings, 1 is a heat insulation box, 2 is an outer box, 3 is an inner box, 4 is a vacuum insulation panel storage space, 5 is a storage space, 9 is an outer shell, 10 is an inner shell, 17 is a capillary tube (pipe), 18, 19 are suction pipes (pipes), 20 is a rod-shaped heat insulating member, 21 is a heat insulating material, 22 is a rod-shaped heat insulating member, 23 is a covering member, and 24 is a foamable heat insulating material.

Claims (1)

It is a refrigerator which made the refrigerator body the heat insulation box which made the interior space the storage space,
A vacuum heat insulation panel is provided at least inside the left side wall, the right side wall and the back wall of the heat insulation box,
Piping provided between the vacuum insulation panels adjacent to each other inside a corner of the insulation box in a state of being separated from the end of the vacuum insulation panel;
A member provided outside the storage space and inside a corner of the heat insulation box to separate the pipe from the end of the vacuum heat insulation panel;
A heat insulating material provided inside the wall portion of the heat insulating box and covering the pipe;
Refrigerator equipped with.

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