WO2022139280A1 - Refrigerator - Google Patents

Abstract

A refrigerator according to an embodiment of the present invention may comprise: a cabinet having a storage space; a main door which opens/closes the storage space and has an opening; a sub door which is rotated relative to the main door and opens/closes the opening; and a gasket which is provided in the sub door and is brought into contact with the main door in a state where the sub door is closed, wherein, in a state where the sub door closes the opening, the sub door and the main door are spaced apart from each other to define an inner flow channel and an outer flow channel with respect to the gasket, and the outer flow channel extends to be bent once or more times as going in the direction away from the gasket.

Description

refrigerator

This embodiment relates to a refrigerator.

BACKGROUND ART In general, a refrigerator is a home appliance that allows food to be stored at a low temperature in an internal storage space shielded by a refrigerator door. It is configured to store the stored food in an optimal state.

The refrigerator may be independently placed in a kitchen or living room, or may be stored in a furniture cabinet of the kitchen.

The refrigerator is gradually enlarged and multifunctional according to changes in dietary habits and the trend of luxury products, and refrigerators with various structures and convenience devices in consideration of user convenience are being released.

A refrigerator is disclosed in Korean Patent Laid-Open Publication No. 10-2018-0024352, which is a prior document.

The refrigerator includes a cabinet forming a storage space and a door opening and closing the storage space. The door includes a main door and a sub door.

The main door includes a main gasket, and the main gasket contacts the front surface of the cabinet to partition the storage space from the space outside the main door. Accordingly, the storage space is insulated.

The sub-door includes a sub-gasket, and the sub-gasket is in contact with the front surface of the main door to partition the opening of the main door (or the inner space of the storage case) and the space outside the sub-door. Accordingly, the opening of the sub-door (or the inner space of the storage case) is insulated.

The main door and the sub-door are spaced apart by a predetermined distance by the sub-gasket to form a space.

However, according to the prior literature, since the outer space located in the outer direction in the sub-door in the outer direction based on the sub-gasket is substantially linear, outside air can easily flow to the outer space side, and thus, in terms of heat insulation, There are undesirable disadvantages.

In addition, when the refrigerator is installed in a furniture cabinet, the high-temperature air discharged from the machine room of the refrigerator can easily flow from the space between the main door and the sub-door to the outer space, so that the thermal insulation performance is deteriorated. There is this.

The present embodiment provides a refrigerator that reduces the flow of external air into the space between the main door and the sub-door to maintain thermal insulation performance.

Alternatively or additionally, the present embodiment provides a refrigerator in which the insulation performance of the outer portion of the gasket in the main door is improved.

Alternatively or additionally, the present embodiment provides a refrigerator in which the opening angle of the door can be increased.

Optionally or additionally, the present embodiment provides a refrigerator in which interference between a sub-door and a main door is prevented during the rotation of the sub-door when the opening angle of the door is increased.

A refrigerator according to one aspect includes: a cabinet having a storage space; a main door opening and closing the storage space and having an opening; a sub door rotating with respect to the main door to open and close the opening; and a gasket provided on the sub-door and contacting the main door when the sub-door is closed.

In a state in which the sub-door closes the opening, the sub-door and the main door may be spaced apart to define an inner flow path and an outer flow path based on the gasket.

The outer passage may be bent and extended one or more times in a direction away from the gasket.

At least a portion of the outer passage may extend in a direction away from the front surface of the sub-door as it moves away from the gasket.

The outer flow path may be bent a plurality of times to extend.

The outer flow path may include a first flow path adjacent to the gasket and a second flow path extending from the first flow path to be inclined in a direction away from the front surface of the sub-door.

A length of the second flow path may be longer than a length of the first flow path.

The outer flow path may further include a third flow path extending to be inclined from the second flow path.

The first flow path may be located closer to the front surface of the sub-door than the third flow path.

The outer passage may include a fourth passage extending from the third passage. A width of the fourth flow path may be greater than a width of the third flow path.

The sub door may include a sub door liner. The sub-door liner may include a first part including a gasket coupling part to which the gasket is coupled. The sub-door liner may further include an extension bent from the first part. The sub-door liner may further include a second part that is bent at the extension and forms the first flow path.

The sub-door liner may further include a third part extending to be inclined from the second part and forming the second flow path.

The sub-door liner may include a fourth part extending obliquely from the third part and forming the third flow path.

The second part and the fourth part may extend in a direction parallel to an extension direction of the first part.

The sub-door may further include an inclined plate extending from the outside of the fourth part and forming the fourth flow path. The inclined plate may be inclined in a direction toward the front of the sub-door as it goes outward from the fourth part.

The fourth part may form a fourth flow path extending from the third flow path.

The refrigerator may further include a hinge mechanism that is connected to the main door and the sub-door and provides a rotation center of the main door and a rotation center of the sub-door.

A rotation center of the main door and a rotation center of the sub door may be located on the sub door.

A rotation center of the main door and a rotation center of the sub door may be located between the second flow path and a front surface of the sub door.

The main door may include a front frame and a main door liner connected to the front frame.

The front frame may include a first portion to which the gasket is in contact and which forms the first flow path. The front frame may further include an inclined portion that extends away from the front surface of the sub-door from the first portion to the outside and forms the second flow path.

The front frame may further include a second portion bent at the inclined portion and forming the third flow path.

The main door may further include a side frame connecting a side end of the main door liner and a side end of the front frame.

The main door liner may include a gasket coupling part to which a gasket for contacting the cabinet is coupled. A heat insulating material may be filled in the main door, and the heat insulating material may be positioned in a space formed by the side frame and a space between the gasket of the main door and the side frame. The insulating material may be in contact with the gasket coupling portion and the side frame.

The inclined portion may be spaced apart from the gasket coupling portion at a position corresponding to the gasket coupling portion. The inclined portion may guide the foaming liquid for forming the heat insulator toward the side frame.

The sub-door liner may include a first part including a gasket coupling part to which the gasket is coupled.

The sub-door liner may further include a first inner extension that extends obliquely from the first part and is positioned in the opening of the main door. The sub-door liner may further include a second inner extension bent with the first inner extension portion and positioned in the opening of the main door. The first inner extension and the second inner extension may define the inner flow path.

A horizontal length of the second inner extension may be longer than a horizontal length of the first inner extension.

A refrigerator according to another aspect includes: a cabinet having a storage space; a main door opening and closing the storage space and having an opening; a sub door rotating with respect to the main door to open and close the opening; a hinge mechanism connected to the main door and the sub-door and providing a rotation center of the main door and a rotation center of the sub-door; and a gasket provided on the sub-door and contacting the main door when the sub-door is closed.

The sub-door may include a protrusion positioned outside the gasket and protruding in a direction away from the front surface of the sub-door.

The main door may include a groove recessed in a direction away from the front surface of the sub-door so that the protrusion is positioned during the rotation of the sub-door.

A rotation center of the sub-door may be located between the protrusion and the front surface of the sub-door.

A rotation center of the main door may be located between the protrusion and the front surface of the sub door.

A rotation center of the main door may coincide with a rotation center of the sub door.

According to this embodiment, there is an advantage that the insulation performance can be maintained by reducing the flow of external air into the space between the main door and the sub-door.

According to this embodiment, the insulation performance of the outer portion of the gasket in the main door can be improved.

According to this embodiment, even if the refrigerator is located in the furniture cabinet, the opening angle of the door may be increased.

According to the present embodiment, the door opening angle can be secured while reducing the thickness of the door.

1 is a front view of a refrigerator according to the present embodiment.

2 is a view showing a part of a plan view of the refrigerator according to the present embodiment.

3 is a view showing a state in which one door of the present embodiment is separated.

4 is a view showing a state in which the hinge mechanism is coupled to one door of the present embodiment.

5 is a view showing a state in which upper portions of the main door and the sub-door are cut off;

6 is a view showing a hinge receiving portion of the main door.

7 is a perspective view of the hinge mechanism according to the present embodiment.

8 is an exploded perspective view of the hinge mechanism according to the present embodiment.

9 is a cross-sectional view taken along line 9-9 of FIG.

FIG. 10 is a cross-sectional view taken along line 10-10 of FIG. 1;

11 is an enlarged view of a portion X of FIG. 10 ;

12 is a view showing a state in which the main door and the sub door are rotated together;

13 is a view showing a state in which the sub-door is rotated when the main door is closed;

FIG. 14 is a view showing a state in which the sub-door is opened in FIG. 10;

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. In adding reference numerals to the components of each drawing, it should be noted that the same components are given the same reference numerals as much as possible even though they are indicated on different drawings. In addition, in describing the embodiment of the present invention, if it is determined that a detailed description of a related known configuration or function interferes with the understanding of the embodiment of the present invention, the detailed description thereof will be omitted.

In addition, in describing the components of the embodiment of the present invention, terms such as first, second, A, B, (a), (b), etc. may be used. These terms are only for distinguishing the elements from other elements, and the essence, order, or order of the elements are not limited by the terms. When it is described that a component is “connected”, “coupled” or “connected” to another component, the component may be directly connected or connected to the other component, but another component is between each component. It will be understood that may also be "connected", "coupled" or "connected".

1 is a front view of a refrigerator according to this embodiment, FIG. 2 is a view showing a part of a plan view of the refrigerator according to this embodiment, FIG. 3 is a view showing a state in which one door of this embodiment is separated, and FIG. 4 is It is a view showing a state in which the hinge mechanism is coupled to one door of the present embodiment.

1 to 4 , the refrigerator 1 according to the present embodiment may be installed independently in a kitchen or may be installed in a form accommodated in an indoor furniture cabinet. When the refrigerator 1 is installed in an indoor furniture cabinet, the refrigerator 1 may be installed alone or may be installed left and right together with other refrigerators.

The refrigerator 1 may include a cabinet 10 having a storage space and a refrigerator door 20 opening and closing the storage space.

The storage space is not limited, but may be divided into an upper first space and a lower second space, and the refrigerator door 20 also includes a first door 21 for opening and closing the first space and the second space. It may include a second door 22 for opening and closing the space.

The first space may be a refrigerating chamber, and the second space may be a freezing chamber or vice versa. Alternatively, the storage space may include a first space and a second space divided to the left and right. Alternatively, the storage space may be a single space, and a single refrigerator door may open and close the storage space.

At least one of the first door 21 and the second door 22 may be a rotation type door. Alternatively, the single refrigerator door 20 may be a rotating type door.

In this embodiment, the arrangement of the two first doors 21 to the left and right will be described as an example. In addition, in this embodiment, as an example, it will be described that the first door on the right includes the main door 30 and the sub door 40 as an example. Of course, it is also possible that the first door 21 on the left includes the main door 30 and the sub door 40 .

Hereinafter, the first door including the main door 30 and the sub-door 40 will be referred to as "door 21" for convenience of description.

The main door 30 is rotatably connected to the cabinet 10 by a hinge mechanism 50 and can open and close the storage space.

The main door 30 may include a door frame 300 having an opening. The door frame 300 may form the exterior of the main door 30 . The opening of the door frame 300 may communicate with the storage space. A door storage unit such as a basket may be additionally provided at the opening of the door frame 300 or at the rear side of the door frame 300 .

The sub door 40 may open and close an opening of the main door 30 . For example, in a state in which the main door 30 is closed, the sub-door 40 may open the opening. Alternatively, the main door 30 may be opened together with the sub door 40 while the sub door 40 closes the opening of the main door 30 .

The sub door 40 may open and close the opening at the front of the main door 30 . That is, as shown in FIG. 2 , the front surface 40a of the sub door 40 may be located in front of the front surface 30a of the main door 30 . The distance between the front surface 40a of the sub door 40 and the front surface 10a of the cabinet 10 may be longer than the distance between the front surface 30a of the main door 30 and the front surface 10a of the cabinet 10 have.

The sub door 40 may be connected to the hinge mechanism 50 . The sub door 40 may be rotated with respect to the cabinet 10 and the main door 30 by the hinge mechanism 50 .

The hinge mechanism 50 may include a hinge bracket 510 . A portion of the hinge bracket 510 may be fixed to the upper surface of the cabinet 10 . In a state in which the hinge bracket 510 is fixed to the cabinet 10 , another part of the hinge bracket 510 may protrude forward from the front surface 10a of the cabinet 10 .

Another part of the hinge bracket 510 may extend toward the sub door 40 across the main door 30 . For example, the upper surface of the main door 30 may be positioned higher than the hinge bracket 510 . In this case, the hinge bracket 510 may pass through the main door 30 .

The sub door 40 may include a hinge accommodating part 421 for accommodating the hinge bracket 510 that has passed through the main door 30 . The hinge accommodating part 421 may be formed, for example, as the rear surface of the sub-door 40 is depressed forward.

The refrigerator 1 may further include a wire guide 80 for guiding a wire (not shown) electrically connected to a component inside the main door 30 . Of course, the wire guide 80 may be omitted.

The refrigerator 1 may include a bracket cover 70 that covers at least a portion of the hinge bracket 510 . The bracket cover 70 may cover a portion extending forward of the cabinet 10 from the hinge bracket 510 . When the bracket cover 70 covers the hinge bracket 510 , exposure of the hinge mechanism 50 to the outside can be minimized. The bracket cover 70 may be arranged to be vertically aligned with the wire guide 80 . Of course, the bracket cover 70 may be omitted.

The refrigerator 1 may further include an upper cover 60 fixed to the upper surface of the cabinet 10 . The upper cover 60 may be coupled to the bracket cover 70 . The upper cover 60 may cover the hinge bracket 510 . Exposure of the hinge mechanism 50 to the outside by the upper cover 60 may be minimized. Of course, the upper cover 60 may be omitted.

5 is a view showing a state in which upper portions of the main door and the sub door are cut off, and FIG. 6 is a view showing a hinge receiving part of the main door.

2, 5 and 6 , the main door 30 may include a hinge accommodating part 32 for accommodating a portion of the hinge bracket 510 . The hinge receiving part 32 may be formed as the rear surface of the main door 30 is depressed toward the front side.

The main door 30 may further include a slot 33 through which the hinge bracket 510 passes. In a state in which the hinge bracket 510 penetrates the slot 33 , the hinge bracket 510 may be positioned in the hinge receiving part 32 . A portion of the hinge bracket 510 passing through the slot 33 may be located in the hinge receiving portion 421 of the sub door 40 .

The hinge mechanism 50 may provide a center of rotation C (or a central axis of rotation) of the main door 30 as well as a center of rotation C of the sub door 30 .

The rotation center C may be located at the sub-door 40 . For example, the rotation center C may extend in the vertical direction from the sub-door 30 .

In the hinge mechanism 50 , a portion located in the hinge receiving portion 421 of the sub door 40 may provide the rotation center C . That is, the rotation center C may be located in front of the front surface 30a of the main door 30 .

The rotation center C of the main door 30 may coincide with the rotation center C of the sub door 30 . That is, the main door 30 and the sub-door 30 may have the same rotation center C. As shown in FIG.

The hinge mechanism 50 may further include a fixing bracket 550 to be fixed to the main door 30 . A coupling guide 35 for guiding the coupling of the fixing bracket 550 to the bottom 34 of the hinge receiving part 32 of the main door 30 may be provided, for example.

The coupling guide 35 may protrude upward from the bottom 34 of the hinge receiving part 32 . The coupling guide 35 is formed in a shape corresponding to a portion of the fixing bracket 550 and may surround a portion of the circumference of the fixing bracket 550 placed on the bottom 34 of the hinge receiving part 32 . A plurality of fastening holes 36 may be formed in the bottom 34 of the hinge receiving part 32 . The fastening member may be fastened to the fixing bracket 550 and the fastening hole 36 .

The fixing bracket 550 may be formed of a metal material to prevent deformation when the main door 30 or the sub door 40 is rotated. On the other hand, the bottom 34 of the hinge receiving part 32 may be formed of a non-metal material.

The fixing bracket 550 is located on the lower side of the bottom 34 of the hinge accommodating part 32 so that the fastening force between the fixing brackets 550 of different materials and the bottom 34 of the hinge accommodating part 32 is increased. ) and a separate fastening plate (not shown) for fastening may be provided. For example, the fastening plate may be formed of a metal material. In this case, in a state where the bottom 34 of the hinge accommodating part 32 is positioned between the fastening plate and the fixing bracket 550, the fixing bracket 550 and the hinge accommodating part 32 are formed by a fastening member. The bottom 34 and the fastening plate may be fastened. Of course, the fastening plate may be omitted.

A part of the fixing bracket 550 is located in the hinge receiving part 32 of the main door 30 , and the other part penetrates the slot 33 of the main door 30 to remove the sub-door 40 . It may be located in the hinge receiving part 421 . The rotation center C may pass through the fixing bracket 550 located in the hinge receiving part 421 .

Hereinafter, the hinge mechanism 50 will be described in detail.

7 is a perspective view of the hinge mechanism according to the present embodiment, FIG. 8 is an exploded perspective view of the hinge mechanism according to the present embodiment, and FIG. 9 is a cross-sectional view taken along lines 9-9 of FIG. 4 .

5 to 9 , the hinge mechanism 50 may include a hinge bracket 510 as described above.

The hinge bracket 510 may include a first bracket 511 seated and fixed to the cabinet 10 .

A plurality of fastening holes 511a through which a fastening member for fastening to the cabinet 10 passes may be provided in the first bracket 511 .

The first bracket 511 may further include a rib through hole 511b through which a fixing rib (not shown) provided in the cabinet 10 passes. Of course, the rib through hole 511b may be omitted.

The hinge bracket 510 may further include a second bracket 513 extending to be inclined from the first bracket 511 . The second bracket 513 may extend from an end of the first bracket 511 to be inclined upwardly toward the front. Alternatively, the second bracket 513 may extend vertically upward from an end of the first bracket 511 .

The hinge bracket 510 may further include a third bracket 515 extending forward from the second bracket 513 in a horizontal direction.

For example, the first bracket 511 and the third bracket 515 may be side by side, and the height may be different by the second bracket 513 . The third bracket 515 may be positioned higher than the first bracket 511 .

The third bracket 515 may pass through the slot 33 of the main door 30 . The third bracket 515 passing through the slot 33 of the main door 30 may be located in the hinge receiving portion 421 of the sub door 40 .

The rotation center C may penetrate the third bracket 515 in the vertical direction.

The third bracket 515 may be provided with a strength reinforcing part 516 . A cover coupling part 517 for coupling the bracket cover 70 may be provided on the third bracket 515 . Although not limited, at least two cover coupling parts 517 may be provided on the third bracket 515 . In this case, the strength reinforcing part 516 may be positioned between the two cover coupling parts 517 . One or more cover coupling portions may also be formed in the first bracket 511 . Of course, when the bracket cover 70 is omitted, the cover coupling part 517 may also be omitted.

The hinge bracket 510 may include a first opening 518 . The first opening 518 may be formed to vertically penetrate the hinge bracket 510 . The rotation center C may pass through the first opening 518 .

For example, the first opening 518 may be formed in the third bracket 515 . The first opening 518 may be located at an end of the third bracket 515 .

The hinge mechanism 50 may further include a lever 520 rotatably connected to the hinge bracket 510 . The lever 520 may be rotatably connected to the first bracket 511, for example.

The lever 520 may be provided with a depression 522 that forms a space in which the fixing rib passing through the rib through hole 511b is located. During the rotation of the lever 520 , the fixing rib may be positioned in the depression 522 without interfering with the lever 520 . Of course, in this embodiment, the lever 520 may be omitted.

The hinge region 50 may further include a first hinge pin 530 . The first hinge pin 530 may enable rotation of the main door 30 . For example, the first hinge pin 530 may provide a rotation center of the main door 30 .

The first hinge pin 530 may include a first shaft 532 . The first shaft 532 may be formed in a cylindrical shape, for example.

The first hinge pin 530 may further include an extension 534 extending upward from the first shaft 532 . The diameter of the first extension 534 may increase from the upper end of the first shaft 532 toward the upper side.

The first hinge pin 530 may further include a coupling body 536 extending upward from the extension part 534 . The coupling body 536 may be formed to be larger than a diameter of the first shaft 532 . The coupling body 536 may be the same as or larger than the diameter of the upper end of the extension part 534 .

The coupling body 536 may be coupled to the first opening 518 . A diameter of the coupling body 536 may be equal to or larger than that of the first opening 518 , so that the coupling body 536 may be fitted into the first opening 518 .

A vertical length of the coupling body 536 may be greater than a thickness of the third bracket 515 .

The vertical length of the coupling body 536 may be longer than the vertical length of the extension part 534 . The vertical length of the first shaft 532 may be longer than the vertical length of the coupling body 536 .

The outer diameter of the first shaft 532 may be 5 mm or more and 10 mm or less to prevent an increase in door thickness while ensuring strength.

The first hinge pin 530 may further include a first flange 538 extending in a horizontal direction around the coupling body 536 . For example, the first flange 538 may be continuously formed along the circumference of the upper end of the coupling body 536 .

The first flange 538 may be seated on the upper surface of the third bracket 515 while the coupling body 536 is fitted to the first opening 518 . Accordingly, the first flange 538 may limit the downward movement of the first hinge pin 530 .

When the first hinge pin 530 is coupled to the hinge bracket 510 as a separate part, the assembly of the operator can be improved, and the length of the first hinge pin 530 itself can be reduced, There is an advantage that the limitation of the working space can be reduced.

Since the first hinge pin 530 is fixed to the hinge bracket 510 , the main door 30 may rotate around the fixed first hinge pin 530 .

The hinge mechanism 50 may further include a first bushing 540 coupled to the first shaft 532 . The first bushing 540 may be rotatably coupled to the first shaft 532 . The first shaft 532 may be formed of a metal material, and the first bushing 540 may be formed of a non-metal material. Accordingly, the first bushing 540 may be smoothly rotated with respect to the first shaft 532 by the first bushing 540 .

The first bushing 540 may include a first body 542 including a space 543 for accommodating the first shaft 532 . The first body 542 may have a cylindrical shape, for example.

The vertical length of the first body 542 may be equal to or greater than the vertical length of the first shaft 532 .

The first bushing 540 may further include a flange 544 extending in a horizontal direction from the upper end of the first body 542 . The flange 544 may be continuously formed along the upper periphery of the first body 542 , for example.

An inclined surface 544 corresponding to the inclination of the extension part 534 may be included on the upper inner peripheral surface of the first body 542 to prevent interference with the extension part 534 . That is, the upper end of the first body 542 may surround the extension 534 .

The hinge mechanism 50 may further include the above-described fixing bracket 550 . The fixing bracket 550 may include a door coupling bracket 551 fixed to the main door 30 . The door coupling bracket 551 may include a plurality of fastening holes 552 corresponding to the plurality of fastening holes 36 of the main door 30 .

The third bracket 515 may be disposed to vertically overlap with the door coupling bracket 551 in the hinge receiving part 32 of the main door 30 .

At this time, since the third bracket 515 of the hinge bracket 510 is positioned higher than the first bracket 511 , the third bracket 515 is positioned in the hinge receiving part 32 of the main door 30 . ) may be spaced apart from the bottom 34 of the hinge receiving part 32 .

Since the third bracket 515 is spaced upwardly from the bottom 34 of the hinge accommodating part 32 , the door is positioned between the third bracket 515 and the bottom 34 of the hinge accommodating part 32 . A space in which the coupling bracket 551 can be located may be formed.

In a state in which the door coupling bracket 551 is fixed to the bottom 34 of the hinge receiving part 32 , the third bracket 515 may be spaced apart from the door coupling bracket 551 .

The fixing bracket 550 may further include an extension bracket 553 extending to be inclined from the door coupling part 552 . The extension bracket 553 may be inclined upward toward the front from the door coupling bracket 551 .

The fixing bracket 550 may further include a support bracket 554 extending in a horizontal direction from the extension bracket 553 . The support bracket 554 may be positioned higher than the door coupling bracket 551 by the extension bracket 553 .

In order to prevent the support bracket 554 from interfering with the third bracket 515 , the vertical length of the extension bracket 553 may be shorter than the vertical length of the second bracket 513 . Accordingly, the support bracket 554 may be spaced apart from the third bracket 515 under the third bracket 515 .

In this embodiment, as long as the support bracket 554 and the third bracket 515 are spaced apart, the shapes of the hinge bracket 510 and the fixing bracket 550 are not limited to the above description, and may be modified in various shapes. It may be possible.

The fixing bracket 550 may include a second opening 556 . The second opening 556 may be formed to vertically penetrate the fixing bracket 550 . The second opening 556 may be vertically aligned with the first opening 518 of the hinge bracket 510 . Accordingly, the rotation center C may pass through the first opening 518 and the second opening 556 . For example, the second opening 556 may be formed in the support bracket 554 .

The hinge mechanism 50 may further include a second hinge pin 560 . The second hinge pin 560 may enable rotation of the sub door 40 with respect to the main door 30 . For example, the second hinge pin 560 may provide the rotation center C of the sub-door 40 . At this time, the rotation center C of the main door 30 provided by the first hinge pin 530 and the rotation center C of the sub door 40 provided by the second hinge pin 560 coincide do.

The second hinge pin 560 may include a second shaft 562 . The first shaft 562 may be formed in a cylindrical shape, for example.

The second hinge pin 560 may further include a pin body 564 extending upward from the second shaft 562 .

The pin body 564 may include an accommodation space 565 for accommodating the first body 542 of the first bushing 540 . An inner circumferential surface of the pin body 564 forming the accommodating space 565 may contact an outer circumferential surface of the first bushing 540 .

The vertical length of the pin body 564 may be longer than the vertical length of the second shaft 562 . Accordingly, the first bushing 540 may be accommodated in the pin body 564 , and the first shaft 532 may be accommodated in the first bushing 540 in the pin body 564 .

The outer diameter of the second shaft 562 may be 5 mm or more and 10 mm or less so as to prevent an increase in door thickness while securing strength.

The first body 542 of the first bushing 540 may be fitted to the pin body 564 . Accordingly, the first bushing 540 may be rotated with respect to the first shaft 532 while being fixed to the pin body 564 during the rotation of the main door 30 .

The pin body 564 may be coupled to the second opening 556 . A diameter of the pin body 564 is formed to be larger than a diameter of the second opening 556 , so that the pin body 564 may be fitted into the second opening 556 .

The pin body 564 may further include a second flange 567 extending in a horizontal direction around the pin body 564 . For example, the second flange 567 may be continuously formed along the circumference of the pin body 564 at a position spaced downward from the upper end of the pin body 564 . In a state in which the pin body 564 is coupled to the second opening 556 , the second flange 567 may be seated on the upper surface of the support bracket 554 .

When the second hinge pin 560 is coupled to the support bracket 554 as a separate part, the assembly of the operator can be improved, and the length of the second hinge pin 560 itself can be reduced, There is an advantage that the limitation of the working space can be reduced.

In addition, since the second hinge pin 560 exists as a separate component from the first hinge pin 530 , the assembling property of the operator can be improved during the door assembly process, and the limitation of the working space can be reduced. .

In a state where the first body 542 of the first bushing 540 is accommodated in the pin body 564 , the flange 544 of the first bushing 540 may be seated on the upper end of the pin body 564 . have. The flange 544 of the first bushing 540 may be spaced apart from the third bracket 515 .

In the present embodiment, since the first bushing 540 is disposed between the first hinge pin 530 and the second hinge pin 560 , the first shaft 532 is the second hinge pin 560 . ), direct friction between the first shaft 532 and the second hinge pin 560 can be prevented even in a state located inside the .

In the present embodiment, since the first shaft 532 is accommodated in the second hinge pin 560 , even if the rotation centers C of the main door 30 and the sub door 40 coincide with each other, the hinge mechanism An increase in the height of (50) can be minimized.

The hinge mechanism 50 may further include a second bushing 570 coupled to the second shaft 562 . The second bushing 570 may be coupled to the second shaft 562 to be relatively rotatable. The second shaft 562 may be formed of a metal material, and the second bushing 570 may be formed of a non-metal material. The second bushing 570 may smoothly rotate with respect to the second shaft 562 during the rotation of the sub-door 40 by the second bushing 570 .

The second bushing 570 may include a lower body 572 accommodating the second shaft 562 and an upper body 574 accommodating the pin body 564 .

An inner diameter of the upper body 574 may be greater than an inner diameter of the lower body 572 . An outer diameter of the upper body 574 may be greater than an outer diameter of the lower body 572 .

Due to the difference in diameter between the lower body 572 and the upper body 574 , the second bushing 570 may include a stepped surface 575 . The pin body 564 may be seated on the stepped surface 575 . When the pin body 564 is seated on the stepped surface 575 , the end of the upper body 574 may be spaced apart from the lower surface of the support bracket 554 .

On the other hand, the sub-door 40 may include a part of a front plate 410 , a door frame 420 coupled to the front plate 410 , and a door liner 430 coupled to the door frame 420 , or can include all. A front panel 440 may be detachably coupled to the front surface of the front plate 410 . The front panel 440 may be formed of, for example, a glass material. In this case, the front panel 440 may form the front exterior of the sub-door 40 .

As another example, the front panel 440 may be omitted. In this case, the front plate 410 may form a front exterior of the sub-door 40 . As another example, the front plate 410 and the door frame 420 may be formed separately or integrally.

The door frame 420 may include the hinge receiving part 421 . The hinge accommodating part 421 may be formed, for example, as the rear surface of the door frame 420 is depressed toward the front side.

In the door frame 420 , a recessed hinge coupling part 422 may be provided on the bottom surface 421a of the hinge receiving part 421 . The rotation center C may pass through the hinge coupling part 422 in the vertical direction.

For example, the second bushing 570 may be coupled to the hinge coupling part 422 .

The hinge coupling part 422 includes a first accommodating part 423 having a first space 423a, extending upward from the first accommodating part 423, and having a second space 425a. A second accommodating part 425 may be included.

The inner diameter of the second accommodating part 425 may be larger than the inner diameter of the first accommodating part 423 .

The lower body 572 of the second bushing 570 may be accommodated in the first accommodating part 423 . The upper body 574 of the second bushing 570 may be accommodated in the second receiving part 425 .

Due to the difference in diameter between the first accommodating part 423 and the second accommodating part 425 , the hinge coupling part 422 is a support part 424 supporting the stepped surface 575 of the second bushing 570 . ) may be further included.

In a state in which the second bushing 570 is coupled to the hinge coupling part 422 , when the sub-door 40 is rotated, the hinge coupling part 422 and the second bushing 570 are joined together with the second It can be rotated about the hinge pin 560 .

A lower surface of the support bracket 554 may be spaced apart from the bottom surface 421a of the hinge receiving part 421 . The upper end of the second bushing 570 may be spaced apart from the lower surface of the support bracket 554 while being coupled to the hinge coupling part 422 .

An assembly process of the hinge mechanism 50 will be briefly described.

The second bushing 570 may be coupled to the hinge coupling part 422 of the sub door 40 .

The second hinge pin 560 may be coupled to the fixing bracket 550 . In this state, when the fixing bracket 550 is fixed to the main door 30 and the second hinge pin 560 is inserted into the second bushing 570, the main door 30 and the sub door (40) can be connected.

The first bushing 540 may be coupled to the second hinge pin 560 . The first hinge pin 530 may be coupled to the hinge bracket 510 .

When the hinge bracket 510 is fixed to the cabinet 10 and the first hinge pin 530 is inserted into the first bushing 540 , the assembly of the hinge mechanism 50 may be completed.

FIG. 10 is a cross-sectional view taken along line 10-10 of FIG. 1 , and FIG. 11 is an enlarged view of a portion X of FIG. 10 .

10 and 11 , the main door 30 may include door frames 310 and 330 having an opening 310a. A heat insulating material may be provided in the door frames 310 and 330 .

The door frames 310 and 330 may include a front frame 310 and a main door liner 330 connected to the front frame 310 .

The front frame 310 may include a first portion 311 in contact with a gasket 470 (or a sub-door gasket) of the sub-door 40 to be described later.

The front frame 310 may include an inclined portion 312 inclinedly extending from the first portion 311 . The inclined portion 312 may extend from an outer end of the first portion 311 in a direction away from the front surface of the sub-door 40 . That is, the inclined portion 312 may extend from an outer end of the first portion 311 in a direction closer to the main door liner 330 .

The front frame 310 may further include a second portion 313 extending from an end of the inclined portion 312 . The second part 313 may be substantially parallel to the first part 311 .

The first portion 311 and the second portion 313 are spaced apart from each other in the front-rear direction by the inclined portion 312 , and the second portion 313 may be positioned rearward than the first portion 311 . can

The left and right lengths of the second part 313 may be shorter than the left and right lengths of the first part 311 .

The front frame 310 may further include a third portion 314 (or an inner extension portion) bent at the inner end of the first portion 311 .

The third part 314 may be bent at about 90 degrees from the first part 311 . The third part 314 may extend in a direction away from the gasket 470 (or the sub-door gasket) of the sub-door 40 from the first part 311 .

The main door liner 330 may include a first liner part 331 having a gasket coupling part 332 to which the gasket 390 of the main door 30 is coupled.

As a portion of the first liner part 331 is recessed toward the sub-door 40 side, the gasket coupling part 332 may be formed. On the other side, the gasket coupling part 311 has a space 332a for coupling the gasket 390 therein as a part of the first liner part 331 protrudes toward the sub-door 40 side. can form.

The gasket coupling part 332 may be spaced apart from the front frame 310 . At least a portion of the gasket coupling part 332 is disposed to face or correspond to the inclined part 312 of the front frame 310 , and may be spaced apart from the inclined part 312 .

The first liner part 331 may include a frame contact part 333 that contacts a side frame 350 to be described later.

The frame contact portion 333 may be disposed to face the second portion 313 of the front frame 310 .

The main door liner 330 may include a second liner part 334 extending from the first liner part 331 to the opposite side of the frame contact part 333 .

The second liner part 334 may include a die part 335 . The dyke part 335 may be accommodated in the storage space of the cabinet 10 in a state in which the main door 30 is closed. A path through which the cool air in the storage space flows toward the gasket 390 of the main door 30 is lengthened by the dyke part 335 , so that deterioration in thermal insulation performance can be minimized.

The die part 335 may include a first extension part 336 extending in the front-rear direction. The die part 335 may further include a second extension part 337 extending in a left and right direction from the first extension part 336 . The die part 335 may further include a third extension part 338 extending in the front-rear direction from the first extension part 337 .

The third extension 3378 may extend in a direction closer to the sub-door 40 from the second extension 337 .

The first extension part 336 and the third extension part 338 may be spaced apart by the second extension part 337 , and a thermal insulation space 370 for filling the thermal insulation material 380 may be formed therein. .

The front and rear lengths of the third extension 338 may be longer than the front and rear lengths of the first extension 336 . The third extension 338 may be connected to the front frame 310 . For example, in a state in which the third extension 338 is positioned between the third portion 314 of the front frame 310 and the first extension 336 , the third extension 338 is formed on the front surface. It may be coupled with the third portion 314 of the frame 310 .

The main door 30 may further include a connection frame 360 connecting the front frame 310 and upper and/or lower sides of the main door liner 330 .

The main door 30 may further include a side frame 350 connecting a side surface of the front frame 310 and a side surface of the main door liner 330 .

The side frame 350 may be connected to the connection frame 360 .

The side frame 350 may be formed of a metal material. Although not limited, the side frame 350 may be formed of an aluminum material. The main door liner 330 may be formed of a non-metal material.

The connection frame 360 includes a first frame portion 361 extending in a front-rear direction, a second frame portion 362 extending in a horizontal direction from both ends of the first frame portion 361, and the second It may include a coupling part 363 extending from the frame part 362 .

The side frame 350 may be slidably coupled to the coupling part 363 .

The side frame 350 may include a first frame part 352 extending in the front-rear direction. The first frame part 352 may form a side surface of the main door 30 . An end of the first frame part 352 may contact the first frame part 361 .

The side frame 350 may further include a pair of second frame parts 354 and 354a extending in a horizontal direction from both ends of the first frame part 352 .

The pair of second frame parts 354 and 354a may be positioned between the second portion 313 of the front frame 310 and the contact portion 333 of the main door liner 330 .

Any one 354 of the pair of second frame parts may contact the second part 313 of the front frame 310 . The other one 354a of the pair of second frame parts may contact the contact portion 333 of the main door liner 330 .

A portion of the second frame parts 354 and 354a may contact the second frame part 362 . The pair of second frame parts 362 may be positioned between the pair of second frame parts 354 and 354a.

The side frame 350 may further include a third frame part 356 extending in a direction closer to each other from the ends of the pair of second frame parts 354 and 354a.

The third frame part 356 may be coupled to the coupling part 363 . For example, the third frame part 356 may be inserted into the coupling part 363 to be coupled.

The front frame 310 , the main door liner 330 , and the side frame 350 may form an insulating space 370 , which is a space in which the insulating material 380 is filled.

The third frame part 356 may be spaced apart from the gasket coupling part 332 . The gasket coupling part 332 may be spaced apart from the inclined part 312 and the second part 313 . A space 371 between the gasket coupling part 332 and the inclined part 312 may form a part of the heat insulating space 370 .

In addition, since the pair of second frame parts 354 and 354a are spaced apart in the front-rear direction, the space 372 formed by the second frame parts 354 and 354a and the first frame part 352 is also It may form a part of the heat insulation space 370 .

Accordingly, the insulating material 380 may be positioned between the second frame parts 354 and 354a. In addition, the insulating material 380 may be located in the space 373 formed between the gasket coupling part 332 and the third frame part 356 .

According to this embodiment, since the heat insulating material 380 may be located in a portion located outside the gasket coupling part 332 of the main door 30, the heat insulation performance of the main door 30 can be improved. there are advantages to

In the present embodiment, the foaming liquid for forming the heat insulating material may first flow into a space (main flow path) between the first part 311 of the front frame 310 and the second liner part 334 . The foaming liquid flowing into the main flow path may flow toward the side frame 350 along the inclined portion 312 to fill the space 372 formed by the side frame 350 .

In this case, the inclined portion 312 may smoothly flow toward the space 372 formed by the side frame 350 by the inclined shape. That is, the inclined portion 312 may serve to guide the flow of the foaming liquid.

Meanwhile, as described above, the sub-door 40 may include a front plate 410 and a sub-door liner 430 .

The sub-door liner 430 may include a first part 432 to which the gasket 470 is coupled. The first part 432 may include a gasket coupling part 433 to which the gasket 470 is coupled.

The first part 432 may be disposed to face the first part 311 . The gasket 470 coupled to the gasket coupling part 433 of the first part 432 may contact the first part 311 .

The sub-door liner 430 may further include an extension portion 434 that is bent and extended from one end of the first part 432 . For example, the extension portion 434 may extend toward the first portion 311 . The extension portion 434 may limit lateral movement of the gasket 470 .

The sub-door liner 430 may further include a second part 435 that is bent and extended from the extension part 434 .

The first part 432 and the second part 435 may be spaced apart from each other in the front-rear direction by the extension part 434 . The second part 435 may be located closer to the first part 411 than the first part 433 .

A part of the second part 435 may be disposed to face the first part 311 of the front frame 310 , and another part may be disposed to face the inclined part 312 .

The first part 432 may extend in a direction substantially parallel to the extension direction of the second part 435 .

The sub-door liner 430 may further include a third part 436 that is bent from the second part 435 and extends. The third part 436 may extend to be inclined from the second part 435 . An angle between the third part 436 and the second part 435 may be greater than 90 degrees.

The third part 436 may be disposed to face or correspond to the inclined portion 312 . An angle between the first part 311 and the inclined part 312 may be the same as an angle between the second part 435 and the third part 436 .

The inclined portion 312 and the third part 436 may be substantially parallel to each other.

The sub-door liner 430 may further include a fourth part 437 that is bent from the third part 436 and extends.

The fourth part 437 may extend in a direction substantially parallel to an extension direction of the second part 435 . The fourth part 437 may be disposed to face the second part 313 . The left and right lengths of the fourth part 437 may be shorter than the left and right lengths of the second part 313 .

The sub-door liner 430 may further include a first inner extension portion 431 that is bent and extended from the other end of the first part 432 .

The first inner extension portion 431 may be disposed to be inclined in a direction away from the gasket coupling portion 433 in the first part 432 .

The sub-door liner 430 may further include a second inner extension 439 that is bent and extended from an end of the first inner extension 431 .

The portion occupied by the left and right lengths of the second inner extension 439 is the largest in the entire left and right lengths of the sub door liner 430 . That is, the horizontal length of the second inner extension 439 is longer than the horizontal length of the first inner extension 431 .

When the sub-door 40 is closed, the first inner extension 431 is disposed to be inclined at a predetermined angle with the first part 432 , and the second inner extension 439 includes the first part ( 432) may extend in a direction substantially parallel to the extension direction.

Based on the front-rear direction, the distance between the second inner extension part 439 and the first part 432 is greater than the distance between the first part 432 and the first part 311 .

Although not limited, the distance between the second inner extension 439 and the first part 432 may be twice or more than the distance between the first part 432 and the first part 311 .

Based on the front-rear direction, the distance between the front plate 410 and the sub-door liner 430 is the largest at the side of the second inner extension 439 .

Accordingly, when the sub-door 40 is closed, the first inner extension 431 and the second inner extension 439 may be positioned within the opening 310a formed by the main door 30 . .

In this embodiment, a heat insulating space 482 filled with a heat insulating material 480 may be formed between the sub door liner 430 and the front plate 410 .

The insulator 480 may contact the first inner extension 431 and the second inner extension 439 .

According to this embodiment, since the second inner extension 439 extends in the left and right directions from the end of the first inner extension 431 , the heat insulating material 480 in contact with the second inner extension 439 is The thickness in the anterior-posterior direction may be increased. Accordingly, when the sub-door 40 is closed, the volume of the insulating material 480 positioned in the opening 310a formed by the main door 30 is increased, so that the thermal insulation performance of the sub-door 40 is improved. can

The sub-door 40 may further include a side plate 460 connected to the front plate 410 .

The side plate 460 may form a side exterior of the sub door 40 .

The sub-door liner 430 may be formed of a non-metal material. On the other hand, in terms of strength reinforcement of the sub-door 40 , the side plate 460 may be formed of a metal material.

The side plate 460 may include a first plate 462 extending in a front-rear direction and a second plate 464 extending in a direction crossing the first plate 462 .

The second plate 464 may extend at a point spaced apart from both front and rear ends of the first plate 462 . The second plate 464 may be coupled to the front plate 410 .

The sub door 40 may further include an intermediate plate 470 . The intermediate plate 470 may connect the side plate 460 and the sub-door liner 430 to each other, for example. As another example, the intermediate plate 470 may be integrally formed with the sub-door liner 430 or the side plate 460 .

The intermediate plate 470 may include a first contact portion 472 in contact with the sub-door liner 430 . The intermediate plate 470 may further include a second contact portion 474 contacting the side plate 460 .

The first contact portion 472 may contact the fourth part 437 of the sub-door liner 430 . The second contact portion 474 may contact the second plate 464 .

An extension direction of the second contact portion 474 may cross an extension direction of the first contact portion 472 . For example, an extension direction of the second contact part 474 may be perpendicular to an extension direction of the first contact part 472 .

The first contact portion 472 may extend in a left-right direction, and the second contact portion 474 may extend in a front-rear direction.

The intermediate plate 470 may further include an inclined plate 473 connecting the first contact portion 472 and the second contact portion 474 .

The inclined plate 473 may be disposed to be inclined with respect to each of the first contact portion 472 and the second contact portion 474 .

The inclined plate 473 may be disposed to overlap the second portion 313 of the front frame 310 in the front-rear direction.

The insulating material 480 may contact the side plate 460 and the intermediate plate 470 .

Hereinafter, the structures of the main door 30 and the sub-door 40 described above will be described in terms of insulation.

When the sub door 40 closes the opening 310a of the main door 30 , the gasket 470 comes into contact with the main door 30 , and the sub door liner 430 closes the main door 30 . (30) (front frame) and spaced apart.

Accordingly, an inner passage S1 and an outer passage S2 , S3 , S4 , and S5 may be formed between the main door 30 and the sub-door 40 based on the gasket 470 .

The gasket 470 may be disposed along the circumference of the rear surface of the sub-door liner 430 .

The inner passage S1 is a passage located outside the region formed by the gasket 470 , and the outer passages S2 , S3 , S4 , and S5 are located outside the region formed by the gasket 470 . It is the euro where it is located.

Cold air may exist in the inner flow path S1. Air outside the refrigerator (hereinafter referred to as “external air”) may exist in the outer passages S2, S3, S4, and S5.

The cold air in the inner passage S1 may be blocked from flowing into the outer passages S2 , S3 , S4 , and S5 by the gasket 470 .

The external air of the outer passages S2 , S3 , S4 , and S5 may be blocked from flowing into the inner passage S1 by the gasket 470 . However, by the gasket 470 , the sub-door liner 430 on which the gasket 470 is installed, and the front frame 310 in contact with the gasket 470 , the cold air of the inner passage S1 and the outer passage Heat exchange between the outside air of (S2, S3, S4, S5) may be made.

A portion of the inner passage S1 may be formed between the first inner extension 431 of the sub-door liner 430 and the third portion 314 of the front frame 310 . Another part of the inner flow path S1 may be formed between the first part 432 and the first part 311 . In this case, the length of the part of the inner flow path S1 may be longer than the length of the other part.

As in this embodiment, when the length of the part of the inner passage S1 is longer than the length of the other portion, the flow resistance of the inner passage S1 for flowing cold air toward the gasket 470 is increased, A flow amount of cold air in the inner flow path S1 may be reduced. In this case, since the amount of cold air to which the heat of the outside air is transferred in the inner flow path S1 is reduced by the gasket 470 , the thermal insulation performance may be prevented from being deteriorated.

The outer flow paths S2 , S3 , S4 , and S5 may be bent one or more times in a direction away from the gasket 470 . For example, at least a portion of the outer flow passages S2 , S3 , S4 , and S5 may extend in a direction away from the front surface of the sub-door 40 .

Although not limited, in FIG. 10 , the outer flow paths S2 , S3 , S4 , and S5 are bent and extended a plurality of times.

The outer flow paths S2 , S3 , S4 , and S5 may include a first flow path S2 adjacent to the gasket 470 .

For example, the first flow path S2 may be positioned between the second part 435 and the first part 411 .

The outer flow passages S2 , S3 , S4 , and S5 may further include a second flow passage S3 extending in an inclined direction from the first flow passage S2 .

The second flow path S3 may be defined by the inclined portion 312 and the third part 436 . The second flow path S3 may extend in a direction away from the front surface of the sub door 40 from the first flow path S2 .

As in the present embodiment, since the flow direction of air in the first flow path S2 and the air flow direction in the second flow path S3 are different, the air flow in the outer flow paths S2, S3, S4, and S5 Flow resistance may be increased. When the flow resistance of air in the outer passages S2, S3, S4, and S5 is increased, the amount of air flowing into the outer passages S2, S3, S4, and S5 is reduced, so that the thermal insulation performance is prevented from being deteriorated. can

A flow path width of the first flow path S2 may be smaller than a flow path width of the second flow path S3 . The length of the flow path of the first flow path S2 may be shorter than the length of the flow path of the second flow path S3 .

The outer flow passages S2 , S3 , S4 , and S5 may further include a third flow passage S4 extending in an inclined direction from the second flow passage S3 .

The third flow path S4 may be located farther from the front surface of the sub door 40 than the first flow path S2 .

The third flow path S4 may be defined by a second part 313 of the front frame 310 and a fourth part 437 of the sub-door liner 430 . The length of the third flow path S4 may be shorter than the length of the second flow path S3 .

As in the present embodiment, since the flow direction of air in the second flow path S3 and the air flow direction in the third flow path S4 are different, the air flow in the outer flow paths S2, S3, S4, and S5 Flow resistance may be increased.

The outer flow paths S2 , S3 , S4 , and S5 may further include a fourth flow path S5 positioned outside the third flow path S4 . The width of the fourth flow path S5 may be greater than that of the third flow path S4 .

The fourth flow path S5 is substantially the inlet side flow path of the outer flow paths S2, S3, S4, and S5.

The fourth flow path S5 may be defined by the second portion 313 of the front frame 310 and the inclined plate 473 of the intermediate plate 470 .

Next, the flow of air outside the refrigerator when the refrigerator of the present invention is accommodated in a furniture cabinet will be described.

When the refrigerator is accommodated in the furniture cabinet, the side surfaces of the cabinet 10 and the door 21 may be located close to but spaced apart from the inner surface of the furniture cabinet.

Accordingly, the air around the door in the furniture cabinet includes the air discharged from the machine room of the refrigerator (hereinafter referred to as first air A) and the air flowing from the front of the sub-door into the interior of the furniture cabinet (hereinafter referred to as the second air). It can be divided into air (referred to as B).

The first air A may flow from the rear of the main door 30 to the fourth flow path S5 after passing between the main door 30 and the furniture cabinet.

In this embodiment, the fourth flow path S5 is defined by the inclined plate 473 , and in order for the first air A to flow into the fourth flow path S5 , the side surface of the main door 30 and There should be a change of direction in the space between the furniture cabinets. However, since the first air (A) whose direction has been changed collides with the inclined plate 473 , the first air (A) passes through the fourth passage ( S5 ) and flows into the third passage ( S4 ). may be limited.

Therefore, according to the present embodiment, even if the refrigerator is installed in the furniture cabinet, the inflow of the high-temperature air discharged from the machine room of the refrigerator into the outer flow passages S2, S3, S4, and S5 can be minimized.

Next, the air in front of the sub-door 40 should flow through the space between the side plate 460 and the furniture cabinet and then be introduced into the outer flow paths S2, S3, S4, and S5.

First, the flow of the second air (B) may be restricted by the first air (A) colliding with the inclined plate 473 .

In addition, even if the first air (A) is not taken into consideration, in order for the second air (B) to flow toward the gasket 470 , after the direction is changed from the fourth flow path ( S5 ) to the third flow path ( S4 ), the The direction is changed again in the third flow path S4 to flow into the second flow path S3.

Since the flow direction of the air in the second flow path S3 is substantially opposite to the air flow direction in the fourth flow path S5, the second air B flows through the outer flow paths S2, S3, S4, Since the flow resistance for flowing S5 is large, the inflow of the second air B into the outer flow paths S2, S3, S4, and S5 may be minimized.

Meanwhile, as described above, the rotation center C of the sub door 40 and the rotation center C of the main door 30 are located on the sub door 40 .

For example, the rotation center C may be located between the front surface of the sub-door 40 and the second flow path S3 . The rotation center C may be positioned between the front plate 410 and the third part 436 of the sub-door liner 430 .

The distance between the front plate 410 and the third part 436 is greater than the distance between the front plate 410 and the second part 435 .

In this embodiment, the second shaft 562 may be accommodated in the second bushing 570 , and the second bushing 570 may be accommodated in the hinge coupling part 422 .

Accordingly, in the hinge coupling part 422 , in the second accommodating part 423 , the distance between the sub-door liner 430 and the front plate 410 is greater than the diameter of the second accommodating part 423 . It can be located in the part.

For example, the second receiving part 423 may be positioned between the front plate 410 and the third part 436 .

In this embodiment, since the third part 436 is inclined in a direction away from the front plate 410 in the second part 435 , there is a gap between the third part 436 and the front plate 410 . The second receiving part 423 may be located.

In the present embodiment, the portions (the second part, the third part, and the fourth part) adjacent to the rotation center C of the sub-door liner 430 have a shape in which they are bent multiple times, so that the It has the advantage of improving strength.

The distance between the rotation center C and the front plate 410 is greater than the distance between the gasket coupling part 433 and the front plate 410 .

12 is a view showing a state in which the main door and the sub-door are rotated together, FIG. 13 is a view showing a state in which the sub-door is rotated in a state in which the main door is closed, and FIG. 14 is a state in which the sub-door is opened in FIG. is a drawing showing

12 , when the main door 30 is opened, the sub-door 40 may be rotated together with the main door 30 . The main door 30 may be rotated based on the rotation center (C). Since the rotation center C is located on the sub-door 40 as described above, the distance between the front surface of the sub-door 40 and the rotation center C is reduced, so that the rotation process of the main door 30 In this case, the possibility that the sub-door 40 collides with a surrounding structure may be reduced.

In addition, even if the thickness of the main door 30 is reduced, when the rotation centers C of the main door 30 and the sub-door 40 are positioned on the sub-door 40, the main door 30 While the rotation of the sub-door 40 is possible during the rotation of the main door 30, the possibility that the sub-door 40 collides with the surrounding structures may be reduced.

Referring to FIG. 13 , in a state in which the main door 30 is closed, the sub-door 40 may be rotated based on a rotation center C. As shown in FIG. Since the rotation center C of the sub-door 40 is located on the sub-door 40, the possibility that the sub-door 40 collides with surrounding structures during the rotation of the sub-door 40 may be reduced. .

When the refrigerator is accommodated in a furniture cabinet, if the overall thickness of the door 21 is reduced, the length of the door 21 protruding from the front of the furniture cabinet may be reduced.

Although not limited, when the total thickness of the door 21 is 55 mm or less, it is possible to prevent the front surface of the door 21 from protruding from the front surface of the furniture cabinet. While the door 21 having such a thickness includes the main door 30 and the sub door 40 , the rotation center C may be located in the sub door 40 .

Referring to FIG. 14 , when the second part 434 of the sub door 40 is used as a reference, the third part 436 and the fourth part 437 are positioned toward the main door 30 side. It is a protrusion that protrudes toward the The rotation center C may be positioned between the protrusion and the front surface of the sub-door.

In the present embodiment, the front frame 310 includes an inclined portion 312 corresponding to the third part 436 of the sub-door liner, and a second portion 313 facing the fourth part. Accordingly, in the front frame 310 , the inclined portion 312 and the second portion 313 with respect to the first portion 311 serve as a groove for preventing interference with the protrusion of the sub door 40 . do Accordingly, interference between the sub-door 40 and the main door 30 can be prevented during the rotation of the sub-door 40 .

Claims (20)

1. a cabinet having a storage space;

   a main door opening and closing the storage space and having an opening;

   a sub door rotating with respect to the main door to open and close the opening; and

   a gasket provided on the sub-door and in contact with the main door when the sub-door is closed;

   In a state in which the sub-door closes the opening, the sub-door and the main door are spaced apart to define an inner flow path and an outer flow path based on the gasket,

   The outer passage is bent one or more times in a direction away from the gasket to extend.
2. The method of claim 1,

   At least a portion of the outer flow path extends in a direction away from the front surface of the sub-door as the distance from the gasket increases.
3. 3. The method of claim 2,

   The outer flow path is bent a plurality of times to extend the refrigerator.
4. The method of claim 1,

   The outer flow path is

   a first flow path adjacent to the gasket;

   and a second flow path extending from the first flow path to be inclined in a direction away from the front surface of the sub-door.
5. 5. The method of claim 4,

   A length of the second flow path is longer than a length of the first flow path.
6. 5. The method of claim 4,

   The outer flow path is

   The refrigerator further comprising a third flow path extending to be inclined from the second flow path.
7. 7. The method of claim 6,

   The first flow path is located closer to the front surface of the sub-door than the third flow path.
8. 7. The method of claim 6,

   The outer flow path includes a fourth flow path extending from the third flow path,

   A width of the fourth flow path is greater than a width of the third flow path.
9. 9. The method of claim 8,

   The sub-door includes a sub-door liner,

   The sub-door liner may include a first part including a gasket coupling part to which the gasket is coupled;

   an extension part bent from the first part;

   a second part bent at the extension part and forming the first flow path;

   a third part extending obliquely from the second part and forming the second flow path;

   and a fourth part extending obliquely from the third part and forming the third flow path.
10. 10. The method of claim 9,

    The second part and the fourth part extend in a direction parallel to an extension direction of the first part.
11. 10. The method of claim 9,

    The sub-door further includes an inclined plate extending from the outside of the fourth part and forming the fourth flow path,

    The inclined plate is inclined in a direction toward the front of the sub-door as it goes outward from the fourth part.
12. 7. The method of claim 6,

    The main door includes a front frame and a main door liner connected to the front frame,

    The front frame includes a first portion to which the gasket is in contact and forming the first flow path;

    an inclined portion extending away from the front surface of the sub-door toward the outside from the first portion and forming the second flow path;

    and a second portion bent at the inclined portion and forming the third flow path.
13. 13. The method of claim 12,

    The main door further includes a side frame connecting a side end of the main door liner and a side end of the front frame,

    The main door liner includes a gasket coupling part to which a gasket for contacting the cabinet is coupled,

    The main door is filled with a heat insulating material, and the heat insulating material is positioned in a space formed by the side frame and a space between the gasket of the main door and the side frame.
14. 14. The method of claim 13,

    The inclined portion is spaced apart from the gasket coupling portion at a position corresponding to the gasket coupling portion, and guides the foaming liquid for forming the heat insulator toward the side frame.
15. 5. The method of claim 4,

    a hinge mechanism connected to the main door and the sub-door and providing a rotation center of the main door and a rotation center of the sub-door;

    A rotation center of the main door and a rotation center of the sub door are located on the sub door.
16. 16. The method of claim 15,

    A rotation center of the main door and a rotation center of the sub door are located between the second flow path and a front surface of the sub door.
17. The method of claim 1,

    The sub-door includes a sub-door liner,

    The sub-door liner may include a first part having a gasket coupling part to which the gasket is coupled;

    a first inner extension extending obliquely from the first part and positioned in the opening of the main door;

    and a second inner extension bent with the first inner extension and positioned in the opening of the main door,

    The first inner extension and the second inner extension define the inner flow path,

    A horizontal length of the second inner extension is longer than a horizontal length of the first inner extension.
18. a cabinet having a storage space;

    a main door opening and closing the storage space and having an opening;

    a sub door rotating with respect to the main door to open and close the opening;

    a hinge mechanism connected to the main door and the sub-door and providing a rotation center of the main door and a rotation center of the sub-door; and

    a gasket provided on the sub-door and in contact with the main door when the sub-door is closed;

    The sub-door includes a protrusion located outside the gasket and protruding in a direction away from the front surface of the sub-door,

    The main door includes a groove recessed in a direction away from the front surface of the sub-door so that the protrusion is positioned during the rotation of the sub-door,

    A rotation center of the sub-door is located between the protrusion and a front surface of the sub-door.
19. 19. The method of claim 18,

    The rotation center of the main door is located between the protrusion and the front surface of the sub door.
20. 20. The method of claim 19,

    The rotation centers of the main door and the sub-door coincide with each other.

Images