JP2021119325A - refrigerator - Google Patents

Abstract

To provide a refrigerator with a thermal insulation door that is excellent in thermal insulation performance and design property without impairing design property and leakage of a thermal insulation material.SOLUTION: A refrigerator includes: an outside plate 10; door frames 20, 22; a liner 60; a space 40 substantially blocked by assembling the outside plate 10, the door frames 20, 22 and the liner 60 together; a gas vent hole disposed in the liner 60; and a tubular flow passage 90 formed in the liner 60 and extending toward a side of the space 40 from the gas vent hole.SELECTED DRAWING: Figure 4

Description

The present invention relates to a refrigerator.

As a heat insulating door in a conventional refrigerator, for example, there is one shown in Patent Document 1 below. The structure will be described with reference to FIGS. 9 and 10. FIG. 9 is a cross-sectional view showing the structure of a rotary opening / closing door of a conventional refrigerator. FIG. 10 is an enlarged cross-sectional view of a portion A in FIG. Generally, a heat insulating door 100, which is a rotary opening / closing door as shown in FIG. 9, is used in the refrigerator.

The heat insulating door 100 shown in FIG. 9 is provided between the outer plate 110, the vacuum heat insulating material 150 adhered to the outer plate 110, the liner 130 processed by vacuum forming, and the outer plate 110 and the liner 130. The frame material 120 and the foam heat insulating material 140 which is foam-filled in the space formed by the outer plate 110, the door liner 130, and the frame material 120 are provided.
As shown in FIG. 10, the bank 180 of the liner 130 is provided with a degassing hole 192 for venting gas at the final filling portion at the time of foam filling of the foamed heat insulating material 140. This makes it difficult for gas to accumulate in the space of the door body, suppresses unfilling of the heat insulating material and uneven density, and prevents deterioration of the heat insulating performance.

Japanese Unexamined Patent Publication No. 8-14733

However, since the formation of the degassing structure is not easy in processing, there is a possibility that the foamed heat insulating material may leak to the outside due to the influence of the foaming pressure from the degassing hole.

Therefore, the present invention has been made to solve the above-mentioned problems, and an object thereof is excellent in designability and heat insulation performance without impairing designability and without causing leakage of foamed heat insulating material. The purpose is to provide a refrigerator with an insulated door.

In order to achieve the above object, the present invention has an outer plate provided on the front surface, a door frame provided on the peripheral edge of the outer plate, an inner plate provided on the back surface of the door frame, and the outer plate. A space that is substantially closed by assembling the door frame and the inner plate, a gas vent hole arranged in the inner plate, and a gas vent hole formed in the inner plate toward the space side from the gas vent hole. It comprises an extending tubular flow path.

According to the present invention, it is possible to provide a refrigerator having a heat insulating door having excellent design and heat insulating performance without impairing the design and causing leakage of the foamed heat insulating material.

It is a front view which shows an example of the refrigerator which concerns on embodiment of this invention. It is a front view which shows the rotary insulation door of a refrigerator. It is an exploded perspective view which shows the rotary insulation door. FIG. 2 is an enlarged cross-sectional view taken along the line II of FIG. FIG. 6 is an enlarged cross-sectional view of the tip of the bank in FIG. FIG. 5 is an enlarged cross-sectional view of the tip of the bank showing a modified example of FIG. It is a perspective view of FIG. FIG. 5 is an enlarged cross-sectional view of the tip of the bank showing another modified example of FIG. It is sectional drawing which shows the structure of the rotary opening door of a conventional refrigerator. FIG. 9 is an enlarged cross-sectional view of the tip of the bank in FIG.

First, an example of the refrigerator according to the embodiment of the present invention will be described with reference to FIGS. 1 to 8.

Hereinafter, as an embodiment of the present invention, a 6-door type refrigerator 1 will be described as an example, but the number of doors is not limited, and the present invention may be applied to a type having 5 doors or less or a 1-door type. Further, in the following, the refrigerator 1 will be described with reference to the direction when the refrigerator 1 is viewed from the front. Further, in the drawings shown below, the same members are appropriately designated by the same reference numerals, and duplicate description will be omitted as appropriate. In addition, the size and shape of the member may be deformed or exaggerated schematically for convenience of explanation.

≪Refrigerator≫
As shown in FIG. 1, the refrigerator 1 includes a refrigerating room 2, an ice making room 3, a switching room (upper freezing room, quick freezing room) 4, a lower freezing room 5 (drawing room, first storage room / hereinafter, "freezing room". 5 ”) and a vegetable compartment 6 (drawer chamber, second storage chamber).

The refrigerator 1 includes rotary (hinge type) heat insulating doors 2a and 2b that open and close the refrigerating chamber 2, a drawer type heat insulating door 3a that opens and closes the ice making room 3, and a drawer type heat insulating door that opens and closes the switching room 4. It is provided with 4a, a drawer-type heat insulating door 5a for opening and closing the freezer compartment 5, and a drawer-type heat insulating door 6a for opening and closing the vegetable compartment 6, respectively.

≪Insulated door≫
The rotary heat insulating doors 2a and 2b have the same configuration. Therefore, the rotary door will be described on behalf of the heat insulating door 2a shown in FIG. Further, since the drawer type heat insulating doors 3a, 4a, 5a, 6a shown in FIGS. 5 to 7 have the same configuration, the heat insulating door 5a will be described later as a representative.

≪Rotating heat insulating door≫
First, the rotary heat insulating door 2a will be described with reference to FIGS. 3 and 4.

As shown in FIG. 3, the heat insulating door 2a is arranged on the glass outer plate 10 provided on the surface of the heat insulating door 2a, the door frame 20 provided on the peripheral edge of the outer plate 10, and the back surface of the outer plate 10. The foamed heat insulating material 50 (see FIG. 4) filled with the vacuum heat insulating material 30 and the space 40 formed by the outer plate 10 and the door frame 20 with the vacuum heat insulating material 30 interposed therebetween, and the back surface of the door frame 20. The inner plate (liner) 60 provided in the door frame 20 and the double-sided tape 70 for fixing the outer plate 10 to the door frame 20 are provided.

<Outer plate>
The outer plate 10 constituting the surface of the heat insulating door 2a is made of a translucent rectangular flat plate member forming an outer wall on the surface (front surface) side of the heat insulating door 2a. The outer peripheral portion of the outer plate 10 is attached to the inner front end portion of the vertically long square frame-shaped door frame 20, and is covered by the door frame 20. The outer plate 10 has a double-sided tape 70 attached to the engaging groove 21a (see FIG. 4) of the frame member 21 on the right side and the tape attaching portions 22a, 23a, 24a of the frame members 22, 23, 24 on the lower left side. Is fixed to the door frame 20 by. The outer plate 10 is preferably a flat plate material made of tempered glass, but may be a translucent door plate such as plastic or a metal door plate.

<Door frame>
As shown in FIG. 3, the door frame 20 is a resin frame body that forms an outer peripheral portion of the rectangular heat insulating door 2a. The door frame 20 is a double-sided tape 70 to which a right side frame member 21 having an engaging groove 21a into which the right side portion of the outer plate 10 is inserted and supported, and a left side portion, an upper side portion, and a lower side portion of the outer plate 10 are attached. The upper and lower left frame members 22, 23, 24 having the tape sticking portions 22a, 23a, 24a to which the tape is stuck are connected in a quadrangular shape.

The engaging groove 21a is formed of a concave groove into which the right side portion of the outer plate 10 is inserted (see FIG. 4).

The tape affixing portions 22a, 23a, 24a are doors of the inner edges of the upper and lower left frame members 22, 23, 24 by the height obtained by adding the thickness of the outer plate 10 and the thickness of the double-sided tape 70 in a cross-sectional view. It is a flat portion formed in a stepped shape from the surface of the frame 20 and extended in a strip shape in a plan view (see FIG. 4).

The double-sided tape 70 is an elongated strip-shaped adhesive tape to which both the front surface and the back surface can be attached.

<Vacuum heat insulating material>
The material of the vacuum heat insulating material 30 is not particularly limited, but for example, the vacuum heat insulating material 30 is made of a heat insulating material in which a core material such as glass wool having a porous structure is vacuum-packed with a laminated film and the inside is vacuum-packed and sealed. Since the thermal conductivity is almost zero, it has excellent heat insulating performance.

<Space>
The space 40 is a portion into which the material of the foam heat insulating material 50 in a high temperature state is poured when the heat insulating door 2a is manufactured, and is formed by an outer plate 10 on which the vacuum heat insulating material 30 is placed and a door frame 20. Has been done. Therefore, since the foamed heat insulating material 50 is filled in the completed heat insulating door 2a, there is no space 40 thereof.

<Effervescent insulation>
The foamed heat insulating material 50 shown in FIG. 4 has a function as a heat insulating material and a function as an adhesive. The foam heat insulating material 50 has the vacuum heat insulating material 30 interposed in the space 40 formed by the outer plate 10 on which the vacuum heat insulating material 30 is placed in the center and the door frame 20 attached to the outer periphery of the outer plate 10. By filling the space 40, it is adhered to the inner wall surface of the space 40. Therefore, the foam heat insulating material 50 is adhered to the back surface of the outer plate 10 in a state of covering the vacuum heat insulating material 30.

<Inner plate>
The liner 60 forming the inner plate on the back surface of the heat insulating door 2a is a resin plate member provided on the storage chamber side of the heat insulating door 2a. The liner 60 is fixed to the peripheral edge of the door frame 20 on the back surface side. A sealing member (not shown) is provided on the outer peripheral portion of the liner 60 on the back surface side in order to bring the heat insulating door 2a into close contact with the refrigerator body to ensure the airtightness of the storage chamber.

<Assembly>
Next, the operation of the rotary heat insulating door 2a of the refrigerator 1 according to the embodiment of the present invention will be described with reference to FIGS. 3 and 4 mainly in the order of assembly.

When assembling the rotary heat insulating door 2a, first, as shown in FIG. 3, the tape sticking portion 22a of the frame member 22, the tape sticking portion 23a of the frame member 23, and the tape sticking portion 24a of the frame member 24 Double-sided tape 70 (see FIG. 4) is attached to each of them. Next, the right end portion of the outer plate 10 is inserted into the engaging groove 21a (see FIG. 4) of the frame member 21, and the upper and lower left ends of the outer plate 10 are inserted into the frame member 22, the frame member 23, and the double-sided tape 70 of the frame member 24. The outer peripheral portion of the outer plate 10 is attached to each.

Subsequently, as shown in FIG. 4, the outer plate 10 is arranged on the lower side, the vacuum heat insulating material 30 is placed in the center of the back surface of the outer plate 10, and the material of the foam heat insulating material 50 is placed in the space 40. Fill. Next, a liner 60 is provided on the back surface side peripheral edge of the door frame 20 to close the space 40. In this way, the heat insulating door 2a is assembled.

≪Liner effect with tubular flow path≫
FIG. 5 is an enlarged cross-sectional view of the tip portion of the bank 80 of FIG. As shown in FIG. 5, the bank tip portion is composed of an inner opening 91, a tubular flow path 90, and a gas vent hole 92. Here, the tubular flow path 90 is molded so as to extend vertically inward from the plane forming the tip portion of the bank 80, and the inner opening 91 and the gas vent hole 92 are connected by a constant diameter. If the liner 60 is molded by injection, even a complicated shape as shown in FIG. 5 can be formed.

Further, the gas vent hole 92 is for releasing the gas generated at the time of foaming of the foamed heat insulating material 50 to the outside, and is formed on the flat surface of the tip portion of the bank 80 in the final filling portion of the foamed heat insulating material 50.

Here, a process of foaming and filling the foamed heat insulating material 50 in the space formed between the outer plate 10 and the liner 60 will be described. As shown in FIG. 4, the foam filling operation is performed with the outer plate 10 facing downward. In this posture, foaming is started by pouring the liquid foam heat insulating material 50 from above the vacuum heat insulating material 30 into the vicinity of the center. The foamed heat insulating material 50 that has started foaming rises while spreading in the horizontal direction. That is, the final filling portion of the heat insulating material is the tip portion of the bank 80 farthest from the vicinity of the center of the vacuum heat insulating material 30.

The foamed heat insulating material 50 that has reached the tip of the bank 80 passes through the inner opening 91 and flows into the tubular flow path 90. At this time, since the inner diameter of the tubular flow path 90 is fine, a flow resistance is generated in the direction opposite to the traveling direction of the foamed heat insulating material 50, and leakage of the foamed heat insulating material 50 from the gas vent hole 92 can be suppressed.

Further, since the tubular flow path 90 in the liner 60 of the present embodiment is provided so as to have a positional relationship parallel to the foaming pressure advancing direction of the foaming heat insulating material 50, bending, deformation, and breaking due to foaming pressure can be suppressed.

Further, the tubular flow path 90 connected to the gas vent hole 92 has a length that does not exceed the bottom of the bank 80 and is housed in the bank 80, so that the vacuum heat insulating material 30 is adhered to the outer plate 10. It is possible to avoid interference and contact with.

≪Modification example≫
The present invention is not limited to the above-described embodiment, and various modifications and modifications can be made within the scope of the technical idea thereof, and the present invention may extend to these modified and modified inventions. Of course. As an example, the tip portion of the liner bank 80 shown in FIG. 5 described in the above embodiment is provided with a tubular flow path 90, and a means for preventing leakage of the foamed heat insulating material 50 from the gas vent hole 92 due to flow resistance has been described. It is not limited to. For example, if a hollow portion connected to the gas vent hole 92 is formed at the tip of the bank 80 by a partition portion extending in the flow direction of the foamed heat insulating material 50, leakage of the foamed heat insulating material 50 can be prevented or the foaming pressure can be used. It is possible to suppress deformation of the liner 60 and the like.

FIG. 6 is a cross-sectional view showing a modified example of the tip portion of the liner bank 80. Here, the same components as those described in the above-described embodiment are designated by the same reference numerals, and the description thereof will be omitted.

As shown in FIGS. 6 and 7, a grid-like rib 93 that separates the space inside the bank 80 from the space inside the bank 80 may be formed at the tip of the bank 80. The rib 93 is composed of a rib opening 94, an inner opening 91, and a gas vent hole 92. If it is formed in this way, it is possible to internally stop the foamed heat insulating material 50 by the flow resistance as in the case where the tubular flow path 90 is provided. Further, from the viewpoint of strength, since it is stronger than the gas vent hole 92 of the tubular flow path 90, it is very useful when suppressing leakage of the foamed heat insulating material 50 other than at the tip of the bank 80. Therefore, it can be used not only as a liner for a rotary heat insulating door but also as a liner for a pull-out type heat insulating door.

FIG. 8 is a cross-sectional view showing another modified example of the tip portion of the liner bank.

As shown in FIG. 8, the pocket / basket assembly portion 81 molded outside the bank 80 is a separate member from the liner 60, and the degassing flow path is provided between the pocket / basket assembly portion 81 and the bank 80. (Hollow portion) may be formed. In this case, an inner opening 91 is formed at the tip of the bank 80, and a gas vent hole 92 is formed at the end of the gas vent flow path. Even in this way, the heat insulating material can be stopped internally by the flow resistance as in the case where the tubular flow path 90 is provided. Further, according to this modification, since the gas vent hole 92 is molded inside the pocket / basket assembly portion 81, the gas vent hole 92 at the tip of the bank 80, which is the design surface, is eliminated. This makes it possible to provide a heat insulating door having excellent design while avoiding the outflow of the foamed heat insulating material 50.

1 Refrigerator 2a, 3a, 4a, 5a, 6a Insulation door 10 Outer panel 20 Door frame 30 Vacuum heat insulating material 40 Space 50 Foaming heat insulating material 60 Inner plate (liner)
70 Double-sided tape 80 Bank 90 Tubular flow path 92 Degassing hole

Claims (4)

The outer panel provided on the surface and
A door frame provided on the periphery of the outer panel and
An inner plate provided on the back surface of the door frame and
A space that is substantially closed by assembling the outer plate, the door frame, and the inner plate, and
The degassing holes arranged in the inner plate and
A refrigerator including a tubular flow path formed in the inner plate and extending from the gas vent hole toward the space side. In the refrigerator according to claim 1,
A bank formed on the inner plate and projecting in a direction away from the outer plate is provided.
The tubular flow path is a refrigerator having a size smaller than the tip of the bank. In the refrigerator according to claim 1 or 2.
The tubular flow path is a refrigerator having an inner diameter fine enough to prevent leakage by inhibiting the flow of the foamed heat insulating material filled in the space. In the refrigerator according to any one of claims 1 to 3.
The tubular flow path is a refrigerator provided in a direction substantially parallel to the traveling direction of the foaming pressure of the foamed heat insulating material filled in the space.

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