Patent Publication Number: US-9429356-B2

Title: Refrigerator

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application claims the benefit of Korean Patent Application No. P10-2014-0028622, filed on Mar. 11, 2014 in the Korean Intellectual Property Office, the disclosure of which is incorporated herein by reference. 
     BACKGROUND 
     1. Field 
     Embodiments of the present invention relate to a refrigerator having a double door. 
     2. Description of the Related Art 
     In general, a refrigerator is an apparatus that keeps food fresh by including a main body including an inner case and an outer case, a storage compartment formed by the inner case, and a cold air supplying unit for supplying cold air to the storage compartment. 
     The temperature of the storage compartment is maintained to be in a predetermined range required to keep food fresh. 
     A front side of the storage compartment of the refrigerator is disposed to be opened, and the opened front side is closed by a door so that the temperature of the storage compartment can be maintained at normal times. 
     The storage compartment is partitioned off by a barrier wall into upper and lower portions. The refrigerator door that opens/closes a refrigerator compartment disposed on the upper portion of the storage compartment is configured of a side by side type door that is rotatably coupled to the main body, and the refrigerator door that opens/closes a freezer compartment disposed on the lower portion of the storage compartment is a drawer type door that slides in a forward/backward direction. 
     For convenience&#39;s sake of a consumer, one of refrigerator compartment doors composed of a pair of doors has a structure of a double door, and the double door is rotatably coupled to a main body by a hinge unit. 
     The double door includes a first door rotatably coupled to the main body and a second door rotatably coupled to the first door. 
     Since the refrigerator compartment is configured to be sealed by the double door including the first door and the second door, there is a need to increase a sealing force between the first door and the main body to effectively prevent leakage of cold air of the refrigerator compartment. 
     SUMMARY 
     Therefore, it is an aspect of the present invention to provide a refrigerator having a structure in which both of an upper portion and a lower portion of a first door come into close contact with a main body, and maximum opening degree of the first door and the second door are individually limited, so that the second door is prevented from colliding with a lateral side of the main body. 
     In accordance with one aspect of the present disclosure, a refrigerator includes a main body, a first door, a second door, a hinge unit, elastic levers and a stopping member. The main body may have a storage compartment. The first door may be rotatably disposed in front of the main body, open/close the storage compartment, and have an opening formed therein, wherein at least one door guard may be disposed in the opening. The second door may be rotatably disposed in front of the first door, open/close the opening, and may be rotated in the same direction as the first door. The hinge unit may include a first upper hinge and a first lower hinge coupled to an upper portion of the main body and a lower portion of the main body corresponding to a lower portion of the first door, respectively, such that the first door is rotatably coupled to the main body, and a second upper hinge and a second lower hinge coupled to an upper portion of the first door and the lower portion of the first door, respectively, such that the second door is rotatably coupled to the first door. Elastic levers may be coupled to the upper portion and the lower portion of the first door, respectively, and upon the first door being closed, may be configured to transfer an elastic force in a direction in which the first door is closed. The stopping member may include a first stopping member coupled to the lower portion of the first door to limit an angle at which the first door is opened and a second stopping member coupled to a lower portion of the second door to limit an angle at which the second door is opened. 
     The elastic lever may include a first elastic lever coupled to the upper portion of the first door and a second elastic lever coupled to the lower portion of the first door. 
     A cam member having a cam surface may be coupled to the first upper hinge such that the first elastic lever makes contact with the cam surface and accumulates an elastic force when the first door is closed, and transfers the elastic force to the first door. 
     The first upper hinge may include a first coupling portion, a first hinge shaft, and a cam member. The first coupling portion may be coupled to the main body. The first hinge shaft may allow the first door to be rotatably coupled to the main body. The cam member coupling portion may extend from the first coupling portion toward the first door and to which the cam member may be coupled. 
     The second upper hinge may include a second coupling portion coupled to the upper portion of the first door, and a second hinge shaft allowing the second door to be rotatably coupled to the first door. 
     The first elastic lever may be provided to be bent in a ‘ ’ shape to have elasticity, and may have one side thereof fastened to the upper portion of the first door by a fastening member and the other side thereof on which a roller is provided to move along a shape of the cam surface by being in contact with the cam surface of the cam member when the first door is closed. 
     The first door may be provided at the upper portion thereof with a first fastening hole to which the first elastic lever is fastened, and the first elastic lever may be provided with a second fastening hole allowing the first elastic lever to be fastened to the first fastening hole by a fastening member. 
     The cam surface may include an inflection point that is a base point when the first door is opened/closed, and a first contact surface and a second contact surface disposed at lower and upper sides of the inflection point, respectively, so as to have opposite inclined surfaces based on the inflection point. 
     The first elastic lever, while the first door is closed, may have the roller come into contact with the first contact surface so as to accumulate an elastic force until reaching the inflection point, and when the roller comes into contact with the second contact surface after passing through the inflection point, transfers the elastic force in a direction in which the first door is closed. 
     The first lower hinge may include a third coupling portion, a third hinge shaft, an elastic lever, and a first contact portion. The third coupling portion may be coupled to the main body. The third hinge shaft may allow the first door to be rotatably coupled to the main body. The elastic lever contact portion may be configured to come into contact with the second elastic lever when the first door is closed such that the second elastic lever accumulates an elastic force and transfers the elastic force to the first door. The first contact portion may be configured to limit the angle at which the first door is opened, by coming into contact with the first stopping member when the first door is opened. 
     The second lower hinge may include a fourth coupling portion coupled to the first door, a fourth hinge shaft allowing the second door to be rotatably coupled to the first door, and a second contact portion configured to limit the angle at which the second door is opened by coming into contact with the second stopping member when the second door is opened. 
     The first door may be provided at the lower portion thereof with a protrusion to which the second lower hinge is fixed, and the second lower hinge may be provided with a first insertion hole inserted around and fixed to the protrusion. 
     The first stopping member and the second elastic lever may be provided with a second insertion hole and a third insertion hole that are inserted around and fixed to the protrusion, such that the first stopping member and the second elastic lever may be inserted around the protrusion together with the second lower hinge, and a hole may be provided in the protrusion such that the first stopping member and the second elastic lever may be fixed to the protrusion together with the second lower hinge by a fastening member fastened to the hole. 
     The first stopping member coupled to the lower portion of the first door may be rotated together with the first door when the first door is opened, and when the first stopping member comes into contact with the first contact portion, rotation of the first door may be stopped and the angle at which the first door is opened may be limited. 
     The second stopping member coupled to the lower portion of the second door may be rotated together with the second door when the second door is opened, and when the second stopping member comes into contact with the second contact portion, rotation of the second door may be stopped and the angle at which the second door is opened may be limited. 
     The above-described embodiments of the present invention are intended as examples, and all embodiments of the present invention are not limited to including the features described above. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       These and/or other aspects of the invention will become apparent and more readily appreciated from the following description of embodiments, taken in conjunction with the accompanying drawings of which: 
         FIG. 1  is a perspective view of a refrigerator in accordance with one embodiment; 
         FIG. 2  is a perspective view of a state in which only a second door of  FIG. 1  is opened; 
         FIG. 3  is a perspective view of a state in which a first door and the second door of  FIG. 1  are opened; 
         FIG. 4  is a view of a state in which a hinge unit and a first elastic lever are coupled to an upper portion of the refrigerator in accordance with an embodiment; 
         FIG. 5  is a view of a state in which the hinge unit, the first elastic lever, and a cam member of  FIG. 4  are disassembled; 
         FIG. 6  is a perspective view of the first elastic lever and the cam member in accordance with an embodiment; 
         FIG. 7  is a view of a state in which the first door and the second door of the refrigerator in accordance with an embodiment are opened together; 
         FIGS. 8 through 12  are views of an operation of closing the first door and the second door in the state of  FIG. 7 ; 
         FIG. 13  is a view of a state in which the hinge unit, a second elastic lever, and a stopping member are coupled to a lower portion of the refrigerator in accordance with an embodiment; 
         FIG. 14  is a view of a state in which the hinge unit, the second elastic lever, and the stopping member of  FIG. 13  are disassembled; 
         FIG. 15  is a view of a state in which an opened angle of the first door of the refrigerator in accordance with an embodiment is limited; 
         FIG. 16  is a view of a state in which an opened angle of the second door of the refrigerator in accordance with an embodiment is limited; 
         FIGS. 17 through 20  are views of an operation of closing the first door and the second door of the refrigerator in accordance with an embodiment; 
         FIG. 21  is an exploded perspective view of a latch unit coupled to a handle in accordance with an embodiment; 
         FIG. 22  is a view of a fixing unit in accordance with one embodiment; 
         FIG. 23  is a view of a hanging portion of  FIG. 22  is disassembled; 
         FIG. 24  is a rear view of the fixing unit illustrated in  FIG. 22 ; 
         FIG. 25  is a cross-sectional view of the fixing unit in accordance with an embodiment; 
         FIG. 26  is a view of a state in which a support is coupled to the handle, in accordance with one embodiment; 
         FIG. 27  is an exploded perspective view of the support and a handle lever in accordance with one embodiment; 
         FIG. 28  is a view of  FIG. 27  at a different angle; 
         FIG. 29  is a view of a guide in accordance with one embodiment; 
         FIG. 30  schematically illustrates a state in which the second door is coupled to the handle in accordance with an embodiment; 
         FIG. 31  is a cross-sectional view of a state in which the second door is fixed to the first door by using the latch unit in accordance with an embodiment; 
         FIG. 32  is a cross-sectional view of a state in which fixing of the second door is released from the first door by using the latch unit in accordance with an embodiment; 
         FIG. 33  is a cross-sectional view of a state in which the second door is opened in the state of  FIG. 32 ; 
         FIG. 34  is a cross-sectional view of a state in which a force applied to a first handle lever is removed from the state of  FIG. 33 ; 
         FIG. 35  is a view of a state in which a lamp is installed at sidewalls of an opening of the first door in accordance with an embodiment; 
         FIG. 36  is a view of a state in which a vacuum insulation panel (VIP) is filled in the second door in accordance with an embodiment; 
         FIG. 37  is a view of a state in which a reinforcement frame is coupled to an internal injection-molded body of the first door in accordance with an embodiment; 
         FIG. 38  is an exploded perspective view of the first door in accordance with an embodiment; 
         FIG. 39  is a view of the reinforcement frame in accordance with an embodiment; 
         FIG. 40  is a view of a state in which an auxiliary reinforcement frame is coupled to a cabinet, in accordance with an embodiment; 
         FIG. 41  is a cross-sectional view of a state in which the reinforcement frame in accordance with an embodiment is disposed in the first door; 
         FIG. 42  is a schematic exploded perspective view of the first door in accordance with an embodiment; 
         FIG. 43  is a cross-sectional view of a state in which a lamp fixing member is disposed in the first door in accordance with an embodiment; 
         FIG. 44  is a perspective view of the lamp fixing member in accordance with an embodiment; 
         FIG. 45  is a view of a wire that connects electronic apparatus components and a lamp is guided toward a main body through a first hinge hole in accordance with one embodiment; 
         FIG. 46  is a view of a state in which the wire that connects the electronic apparatus components and the lamp is guided by a wire guide portion of the lamp fixing member in accordance with one embodiment; 
         FIG. 47  is a view of a part of a storing unit in accordance with one embodiment; 
         FIG. 48  is a view of a portion in which a slide rail and a hanger are coupled to each other, in accordance with one embodiment; 
         FIG. 49  is an exploded perspective view of the storing unit illustrated in  FIG. 40 ; 
         FIG. 50  is a view of a state in which the slide rail and the hanger are coupled to each other, in accordance with one embodiment; 
         FIGS. 51 through 53  are views of an operation in which the hanger is tilted by a tilting adjustment unit, in accordance with one embodiment; 
         FIG. 54  is a view of a state in which the slide rail and the hanger are coupled to each other, in accordance with another embodiment; and 
         FIG. 55  is a view of a state in which the slide rail and the hanger are coupled to each other, in accordance with still another embodiment. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout. 
     With respect to a front side and a rear side that will be described below, a front side of a main body  10  of a refrigerator is referred to as the front side, and a rear side of the main body  10  of the refrigerator is referred to as the rear side. 
     As illustrated in  FIGS. 1 through 3 , the refrigerator includes the main body  10  that constitutes an exterior of the refrigerator, a storage compartment  20  disposed in the main body  10  in such a way that a front side of the storage compartment  20  is opened, and doors  30  and  60  that open/close the storage compartment  20 . 
     The main body  10  includes an inner case (not shown) that constitutes the storage compartment  20 , an outer case (not shown) that constitutes an exterior of the main body  10 , and a cold air supplying unit (not shown) that supplies cold air to the storage compartment  20 . 
     The cold air supplying unit may include a compressor, a condenser, an expansion valve, an evaporator, a blower fan, and a cold air duct. An insulating material (not shown) is foamed between the inner case and the outer case of the main body  10  so as to prevent cold air of the storage compartment  20  from being discharged to the outside. 
     A machine compartment (not shown) in which the compressor that compresses a refrigerant and the condenser that condenses the compressed refrigerant are installed, is provided in a lower side of the rear of the main body  10 . 
     The storage compartment  20  is partitioned off by a barrier wall  11  into upper and lower portions. A refrigerator compartment  21  is disposed in an upper portion of the main body  10 , and a freezer compartment  23  is disposed in a lower portion of the main body  10 . 
     A plurality of shelves  25  may be disposed in the refrigerator compartment  21  and may partition off the refrigerator compartment  21  into a plurality of portions. A plurality of storage containers  27  in which food is stored, may be disposed. 
     The refrigerator compartment  21  is opened/closed by a pair of refrigerator compartment doors  30  rotatably coupled to the main body  10 . The freezer compartment  23  is opened/closed by a freezer compartment door  60  that slides in a forward/backward direction. 
     Handles  31  and  61  are disposed on the refrigerator compartment door  30  and the freezer compartment door  60  so that a user may open/close the refrigerator compartment door  30  and the freezer compartment door  60  by grasping the handles  31  and  61 . 
     The refrigerator compartment door  30  disposed on the right of the drawing of the pair of refrigerator compartment doors  30  may have a structure of a double door. 
     The right refrigerator compartment door  30  having the structure of the double door includes a first door  40  that is rotatably disposed in front of the main body  10  and opens/closes the refrigerator compartment  21 , and a second door  50  that is rotatably disposed in front of the first door  40  and rotated in the same direction as the first door  40 . 
     An opening  41  is disposed in the first door  40 , and a plurality of door guards  33  are disposed in the opening  41 . 
     The opening  41  disposed in the first door  40  is opened/closed by the second door  50  disposed in front of the first door  40 . 
     A cooling plate  55  may be disposed on a rear side of the second door  50  and may be formed of an aluminum (Al) material. 
     Since the cooling plate  55  is formed of the Al material, when the second door  50  is closed, the cooling plate  55  may be uniformly cooled by thermal conduction caused by cold air inside the refrigerator compartment  21  so that the temperature of the entire refrigerator compartment  21  may be uniform. 
     The material used to form the cooling plate  55  is not limited to the Al material but may be formed of a different metal material having good thermal conduction efficiency. 
     Since one side of the refrigerator compartment door  30  has the structure of the double door, when the plurality of door guards  33  disposed in the opening  41  of the first door  40  are used, only the second door  50  is opened without the need of opening the whole of the refrigerator compartment door  30  so that cold air discharge caused by opening/closing of the refrigerator compartment door  30  may be minimized and the energy reduction effect may be achieved. 
     A handle  70  to which a latch unit  200  that causes the first door  40  and the second door  50  to be selectively opened/closed, is coupled, is disposed on the second door  50 . This will be described later. 
     The first door  40  and the second door  50  are rotatably coupled to the main body  10  and the first door  40 , respectively, using a hinge unit  100 . 
     As illustrated in  FIGS. 4 and 5  and  FIGS. 13 and 14 , the hinge unit  100  may include a first upper hinge  110  that is coupled to the upper portion of the main body  10  so that the first door  40  may be rotatably coupled to the main body  10 , a second upper hinge  120  that is coupled to an upper portion of the first door  40  so that the second door  50  may be rotatably coupled to the first door  40 , a first lower hinge  130  that is coupled to the lower portion of the main body  10  corresponding to a lower portion of the first door  40  so that the first door  40  may be rotatably coupled to the main body  10 , and a second lower hinge  140  that is coupled to the lower portion of the first door  40  so that the second door  50  may be rotatably coupled to the first door  40 . 
     As illustrated in  FIGS. 4 through 6 , the first upper hinge  110  includes a first coupling portion  111  coupled to the main body  10 , a first hinge shaft  113  that causes the first door  40  to be rotatably coupled to the main body  10 , and a cam member coupling portion  115  which extends from the first coupling portion  111  toward the first door  40  and to which a cam member  160  that will be described below is coupled. 
     The first coupling portion  111  is coupled to the upper portion of the main body  10  by using a fastening member B. The first hinge shaft  113  is disposed in a portion that extends from the first coupling portion  111  toward the first door  40  and is rotatably inserted into a first hinge hole  44  disposed in the upper portion of the first door  40 . 
     Thus, the first door  40  is rotated about the first hinge shaft  113  to open/close the refrigerator compartment  21 . 
     The second upper hinge  120  includes a second coupling portion  121  coupled to the upper portion of the first door  40  and a second hinge shaft  123  that causes the second door  50  to be rotatably coupled to the first door  40 . 
     The second coupling portion  121  is coupled to the upper portion of the first door  40  by using the fastening member B. The second hinge shaft  123  is disposed in a portion that extends from the second coupling portion  121  toward the second door  50  and is rotatably inserted into a second hinge hole  51  disposed in an upper portion of the second door  50 . 
     The second hinge hole  51  disposed in the upper portion of the second door  50  and the second hinge shaft  123  inserted into the second hinge hole  51  are disposed not to be exposed to the outside in view of sides or the upper portion of the main body  10 , have aesthetic appeal, and may prevent foreign substances, such as dust, from penetrating into the second hinge hole  51  through the sides or the upper portion of the main body  10 . 
     Thus, the second door  50  is rotated about the second hinge shaft  123  so as to open/close the opening  41  disposed in the first door  40 . 
     An elastic lever  150  is disposed in the first door  40  so as to transfer an elastic force in a direction in which the first door  40  is closed, so that the first door  40  may be in close contact with the main body  10  when it is closed. 
     The elastic lever  150  includes a first elastic lever  151  that is disposed in the upper portion of the first door  40  and transfers an elastic force in the direction in which the first door  40  is closed, so that the first door  40  may be in close contact with the main body  10  when it is closed and thus leakage of cold air may be prevented, and a second elastic lever  157  that is disposed in the lower portion of the first door  40  and transfers the elastic force in the direction in which the first door  40  is closed, so that the first door  40  may be in close contact with the main body  10  when it is closed and thus leakage of cold air may be prevented. 
     Since the elastic levers  151  and  157  are disposed in the upper and lower portions of the first door  40  and are in close contact with the main body  10  when the first door  40  is closed, leakage of cold air may be prevented in both the upper and lower portions of the first door  40 . 
     The first elastic lever  151  is disposed to be bent in a ‘ ’ shape to have elasticity. A second fastening hole  155  fastened into a first coupling hole  43  disposed in the upper portion of the first door  40  is disposed at one side of the first elastic lever  151  by using the fastening member B. A roller  153  is disposed at the other side of the first elastic lever  151  so as to be in contact with a cam surface  161  of the cam member  160  and to move along a shape of the cam surface  161  when the first door  40  is closed. 
     The roller  153  is maintained to be not in contact with the cam surface  161  of the cam member  160  in a state in which the first door  40  is fully opened, and when the roller  153  is in contact with the cam surface  161  while the first door  40  is closed, the first elastic lever  151  is compressed and accumulates an elastic force. 
     When the first door  40  is closed in a state in which the roller  153  is in contact with the cam surface  161 , the roller  153  moves along the shape of the cam surface  161  and transfers the accumulated elastic force in a direction in which the first door  40  is closed, so that the first door  40  may be in close contact with the main body  10 . 
     A description of the second elastic lever  157  will be provided below. 
     The cam member  160  is coupled to the cam member coupling portion  115  that extends from the first coupling portion  111  of the first upper hinge  110  toward the first door  40 . When the first door  40  is closed, the cam member  160  is in contact with the first elastic lever  151  and has the cam surface  161  on which the first elastic lever  151  accumulates the elastic force and then transfers the elastic force to the first door  40 . 
     The cam surface  161  includes an inflection point  163  that is a base point when the first door  40  is opened/closed, and a first contact surface  165  and a second contact surface  167  respectively disposed at lower and upper sides of the inflection point  163  so as to have opposite inclined surfaces based on the inflection point  163 . 
     In a state in which the first door  40  is fully opened, the roller  153  of the first elastic lever  151  is not in contact with the cam surface  161  of the cam member  160 , and while the first door  40  is closed, the roller  153  is in contact with the first contact surface  165  of the cam surface  161 . 
     The roller  153  that contacts the first contact surface  165  is sequentially in contact with the first contact surface  165 , the inflection point  163 , and the second contact surface  167  while the first door  40  is closed, and moves so that the first elastic lever  151  accumulates the elastic force and transfers the elastic force to the first door  40  in the direction in which the first door  40  is closed, so that the first door  40  may be in close contact with the main body  10 . 
     Next, an operation in which the first door  40  is in close contact with the main body  10  by the first elastic lever  151  and the cam member  160  when the first door  40  is closed, will be described with reference to  FIGS. 7 through 12 . 
     As illustrated in  FIG. 7 , in a state in which the first door  40  is fully opened, the first elastic lever  151  is maintained not to be in contact with the cam surface  161  of the cam member  160 . 
     When, in the state in which the first door  40  is fully opened, as illustrated in  FIGS. 8 and 9 , the first door  40  is somewhat closed, the roller  153  of the first elastic lever  151  is in contact with the cam surface  161  of the cam member  160 . 
     The roller  153  is primarily in contact with the first contact surface  165  of the cam surface  161 . When, in a state in which the roller  153  is in contact with the first contact surface  165 , the roller  153  is pushed in the direction in which the first door  40  is closed, as illustrated in  FIG. 10 , as the roller  153  moves toward the lower portion of the first contact surface  165 , the first elastic lever  151  is compressed and accumulates the elastic force. 
     When, in a state in which the first elastic lever  151  accumulates the elastic force, the roller  153  is further pushed in the direction in which the first door  40  is closed, as illustrated in  FIG. 11 , the roller  153  moves upward along the first contact surface  165  of the cam surface  161 , passes through the inflection point  163 , and moves toward the second contact surface  167 . 
     As the roller  153  moves toward the second contact surface  167  of the cam surface  161  and is supported on the second contact surface  167 , the first elastic lever  151  transfers the accumulated elastic force to the first door  40 , and the first door  40  is fully closed by the transferred elastic force, as illustrated in  FIG. 12 . 
     When the first door  40  is closed, the first door  40  receives an elastic force in the direction in which the first door  40  is closed, by the elastic force that remains in the first elastic lever  151  and is maintained to be fully in close contact with the main body  10 . 
     Although not shown, when the first door  40  is opened, the roller  153  is sequentially in contact with the second contact surface  167  of the cam surface  161 , the inflection point  163 , and the first contact surface  165  and moves. Before the roller  153  passes through the inflection point  163 , the first door  40  is maintained in a closed state. Thus, even when the other-side refrigerator compartment door  30  is rapidly closed, the first door  40  may be maintained in the closed state. 
     The above-described operations may be applied to both a case where the first door  40  is closed together with the second door  50  or only the first door  40  is closed. 
     As illustrated in  FIGS. 13 and 14 , the first lower hinge  130  includes a third coupling portion  131  coupled to the main body  10 , a third hinge shaft  133  that causes the first door  40  to be rotatably coupled to the main body  10 , an elastic lever contact portion  135  that is in contact with the second elastic lever  157  that will be described later when the first door  40  is closed and by which the second elastic lever  157  accumulates the elastic force and causes the elastic force accumulated on the first door  40  to be transferred, and a first contact portion  137  that is in contact with a first stopping member  180  that will be described later when the first door  40  is opened and that limits an angle at which the first door  40  is opened. 
     The third coupling portion  131  is coupled to the main body  10  by the fastening member B, and the third hinge shaft  133  is disposed in a portion that extends from the third coupling portion  131  to the first door  40  and is rotatably inserted into a third hinge hole  45  disposed in the lower portion of the first door  40 . 
     Thus, the first door  40  is rotated about the third hinge shaft  133  to open/close the refrigerator compartment  21 . 
     The second elastic lever  157  is disposed to be bent in the ‘ ’ shape to have elasticity. One side of the second elastic lever  157  is coupled to a hole  47  inside a protrusion  46  disposed in the lower portion of the first door  40  by the fastening member B, and the other side of the second elastic lever  157  is in contact with the elastic lever contact portion  135  of the first lower hinge  130  when the first door  40  is closed. 
     The other side of the second elastic lever  157  is maintained not to be in contact with the elastic lever contact portion  135  of the first lower hinge  130  in a state in which the first door  40  is fully opened, and while the first door  40  is closed, if the second elastic lever  157  is in contact with the elastic lever contact portion  135 , the second elastic lever  157  is compressed and accumulates the elastic force. 
     When the first door  40  is closed in a state in which the other side of the second elastic lever  157  is in contact with the elastic lever contact portion  135 , the other side of the second elastic lever  157  moves along the surface of the elastic lever contact portion  135  and transfers the accumulated elastic force in the direction in which the first door  40  is closed, so that the first door  40  may be in close contact with the main body  10 . 
     Since the elastic levers  151  and  157  are disposed in the upper and lower portions of the first door  40  and are in close contact with the main body  10  when the first door  40  is closed, both the upper and lower portions of the first door  40  may be in close contact with the main body  10  so that leakage of cold air may be effectively prevented. 
     The second lower hinge  140  includes a fourth coupling portion  141  coupled to the first door  40 , a fourth hinge shaft  143  that causes the second door  50  to be rotatably coupled to the first door  40 , a second contact portion  145  that is in contact with a second stopping member  190  that will be described later when the second door  50  is opened and that limits an angle at which the second door  50  is opened, a first insertion hole  147  inserted into and fixed to the protrusion  46  that protrudes from the lower portion of the first door  40 , and a first penetration hole  149  that is disposed so that the third hinge shaft  133  of the first lower hinge  130  penetrates into the fourth coupling portion  141 . 
     The protrusion  46  that protrudes to fix the second lower hinge  140  is disposed in the lower portion of the first door  40 , and the hole  47  is disposed in the protrusion  46  so that the second lower hinge  140  may be fastened into the hole  47  by using the fastening member B. A fourth hinge hole  53  into which the fourth hinge shaft  143  is rotatably inserted is disposed in the lower portion of the second door  50 . 
     The first insertion hole  147  of the second lower hinge  140  is disposed in the fourth coupling portion  141 . When the first insertion hole  147  is inserted and fixed into the protrusion  46  of the first door  40 , the second lower hinge  140  is coupled to the lower portion of the first door  40  by using the fastening member B. 
     A stopping member  170  is disposed in the lower portion of the first door  40  and the lower portion of the second door  50  so as to limit an angle at which the first door  40  is opened, and an angle at which the second door  50  is opened, and to prevent the first door  40  and the second door  50  from being excessively opened. 
     The stopping member  170  includes the first stopping member  180  that is coupled to the lower portion of the first door  40  and limits the angle at which the first door  40  is opened, and the second stopping member  190  that is coupled to the lower portion of the second door  50  and limits the angle at which the second door  50  is opened. 
     The first stopping member  180  includes a second insertion hole  181  inserted into and fixed to the protrusion  46  disposed in the lower portion of the first door  40 , a first fixed portion  183  fixed to the lower portion of the first door  40  by using the fastening member B, a first stopper  185  that is in contact with the first contact portion  137  of the first lower hinge  130  when the first door  40  is opened and that stops the first door  40  from opening further, and a second penetration hole  187  disposed in the first fixed portion  183  so that the third hinge shaft  133  of the first lower hinge  130  penetrates into the second penetration hole  187 . 
     The first penetration hole  149  disposed in the second lower hinge  140  and the second penetration hole  187  disposed in the first stopping member  180  are disposed in a position corresponding to the third hinge hole  45  disposed in the lower portion of the first door  40  so that the third hinge shaft  133  of the first lower hinge  130  may penetrate into the second penetration hole  187  and the first penetration hole  149  and may be rotatably coupled to the third hinge hole  45 . 
     Since the third hinge shaft  133  of the first lower hinge  130  is configured to penetrate into the second lower hinge  140 , the first lower hinge  130  and the second lower hinge  140  may be together fastened to the lower portion of the first door  40  having a small width. 
     As illustrated in  FIG. 15 , when the first door  40  is opened, the first stopping member  180  fixed to the lower portion of the first door  40  is rotated together with the first door  40 , and when the first stopper  185  is in contact with the first contact portion  137 , rotation of the first door  40  is stopped and thus the first door  40  is not opened any more. 
     The second stopping member  190  includes a second fixed portion  191  fixed to the lower portion of the second door  50  by using the fastening member B, and a second stopper  193  that, when the second door  50  is opened, is in contact with the second contact portion  145  of the second lower hinge  140  and stops the second door  50  not to be opened any more. 
     As illustrated in  FIG. 16 , when the second door  50  is opened, the second stopping member  190  fixed to the lower portion of the second door  50  is rotated together with the second door  50 , and when the second stopper  193  is in contact with the second contact portion  145 , rotation of the second door  50  is stopped and thus the second door  50  is not opened any more. 
     As illustrated in  FIGS. 13 and 14 , a configuration in which the second lower hinge  140 , the first stopping member  180 , and the second elastic lever  157  are coupled to the lower portion of the first door  40 , will be described in detail. First, the first insertion hole  147  of the second lower hinge  140  is inserted into and fixed to the protrusion  46  disposed to protrude from the lower portion of the first door  40 . 
     When the second lower hinge  140  is fixed to the lower portion of the first door  40 , the first stopping member  180  is placed in a lower portion of the second lower hinge  140  so that the second insertion hole  181  of the first stopping member  180  may be inserted into and fixed to the protrusion  46 . 
     When the second lower hinge  140  and the first stopping member  180  are fixed to the lower portion of the first door  40 , the second lower hinge  140  and the first stopping member  180  are coupled to the lower portion of the first door  40  by using the fastening member B. 
     When the second lower hinge  140  and the first stopping member  180  are coupled to the lower portion of the first door  40 , the second elastic lever  157  is placed in the lower portion of the first stopping member  180  so that a third insertion hole  159  may be inserted into the protrusion  46  and may fix the second elastic lever  157 . 
     When the second elastic lever  157  is fixed, the fastening member B is inserted into the third insertion hole  159  and is fastened into the hole  47  disposed in the protrusion  46  so that the second elastic lever  157  may be coupled to the lower portion of the first door  40 . 
     Next, an operation in which, when the first door  40  is closed, the first door  40  is closed to be in close contact with the main body  10  by the second elastic lever  157  and the elastic lever contact portion  135  of the first lower hinge  130 , will be described with reference to  FIGS. 17 through 20 . 
     As illustrated in  FIG. 17 , in a state in which the first door  40  is opened, the second elastic lever  157  is maintained not to be in contact with the elastic lever contact portion  135  of the first lower hinge  130 . 
     When, in a state in which the first door  40  is opened, as illustrated in  FIG. 18 , the first door  40  is somewhat closed, the other side of the second elastic lever  157  is in contact with the elastic lever contact portion  135 . 
     When, in a state in which the other side of the second elastic lever  157  is in contact with the elastic lever contact portion  135 , as illustrated in  FIG. 19 , the second elastic lever  157  is pushed in the direction in which the first door  40  is closed, the other side of the second elastic lever  157  is compressed by the elastic lever contact portion  135 , and the second elastic lever  157  accumulates an elastic force. 
     When, in a state in which the second elastic lever  157  accumulates the elastic force, the second elastic lever  157  is further pushed in the direction in which the first door  40  is closed, as illustrated in  FIG. 19 , the other side of the second elastic lever  157  moves along the surface of the elastic lever contact portion  135  and passes the elastic lever contact portion  135 . 
     The other side of the second elastic lever  157  passes the elastic lever contact portion  135  and is supported by the elastic lever contact portion  135 , and the second elastic lever  157  transfers the accumulated elastic force to the first door  40 , and due to the transferred elastic force, the first door  40  is fully closed, as illustrated in  FIG. 20 . 
     When the first door  40  is closed, the first door  40  receives the elastic force in the direction in which the first door  40  is closed, due to the elastic force that remains in the second elastic lever  157  and is maintained to be fully in close contact with the main body  10 . 
     Although not shown, when the first door  40  is opened, the other side of the second elastic lever  157  is in contact with the elastic lever contact portion  135  in an opposite direction to the direction in which the first door  40  is closed, moves along the surface of the elastic lever contact portion  135 , and passes the elastic lever contact portion  135 . Since the first door  40  is maintained in the closed state before the other side of the second elastic lever  157  passes the elastic lever contact portion  135 , the first door  40  may be maintained in the closed state even when the other-side refrigerator compartment door  30  is rapidly closed. 
     As illustrated in  FIGS. 1 through 3 , the second door  50  includes the handle  70  to which the latch unit  200  that selectively opens/closes the first door  40  and the second door  50 , is coupled. 
     The handle  70  is coupled to a front side of the second door  50 . The latch unit  200  is coupled to a rear side of the handle  70  so that the second door  50  is fixed to the first door  40  and fixing of the second door  50  is released. 
     As illustrated in  FIG. 21 , the latch unit  200  includes a fixing unit  210  buried in the front side of the first door  40 , a support  220  that is accommodated in and coupled to the rear side of the handle  70 , a handle lever  230  including a first handle lever  231  coupled to the support  220  and a second handle lever  233  that is connected to the first handle lever  231  and is hung in the fixing unit  210  or hanging of the second handle lever  233  is released, and a guide  240  which is buried in the second door  50  and through which the handle lever  230  penetrates into the second door  50  from the support  220  and is hung in the fixing unit  210  and hanging of the guide  240  is released. 
     As illustrated in  FIGS. 22 through 25 , the fixing unit  210  includes a hanging portion  211  in which the second handle lever  233  is hung and hanging of which is released, a flow prevention portion  213  that prevents the hanging portion  211  from flowing inside the first door  40 , and a cover  215  that is coupled to a rear side of the flow prevention portion  213  and prevents an insulating material U (see  FIG. 31 ) filled in the first door  40  from penetrating into a space formed between the insulating material U and the flow prevention portion  213 . 
     The hanging portion  211  includes a fixing hole  211   a  fixed to the flow prevention portion  213 , and a hanging hook  211   b  which is disposed at a lower portion of the fixing hole  211   a  and in which the second handle lever  233  is hung and hanging of which is released. 
     The flow prevention portion  213  includes a front side portion  213   a  exposed to an outside of a front side of the first door  40 , a fixing protrusion  213   b  which protrudes from a rear side of the front side portion  213   a  and into which the fixing hole  211   a  is inserted, and an accommodation portion  213   c  that protrudes from the rear side of the front side portion  213   a  so that an accommodation space may be formed in the rear side of the front side portion  213   a.    
     When the fixing protrusion  213   b  is disposed at an upper portion of the accommodation portion  213   c  and the accommodation portion  213   c  in which the accommodation space is formed, is disposed so that front and top sides of the accommodation portion  213   c  may be opened and thus the fixing hole  211   a  of the hanging portion  211  is inserted into the fixing protrusion  213   b  and the hanging portion  211  is fixed to the flow prevention portion  213 , the hanging hook  211   b  is accommodated in the accommodation portion  213   c  through the opened top side of the accommodation portion  213   c , and the hanging hook  211   b  accommodated in the accommodation portion  213   c  is exposed to the outside through the opened front side of the accommodation portion  213   c  so that the second handle lever  233  may be hung in the hanging hook  211   b  and hanging of the second handle lever  233  may be released. 
     When seeing from the opened front side of the accommodation portion  213   c , the hanging hook  211   b  is placed in the upper portion of the accommodation portion  213   c , and a front end of the second handle lever  233  is accommodated in the accommodation portion  213   c  through the opened front side of the accommodation portion  213   c  and moves in a vertical direction and thus, a hanging protrusion  239  disposed on the front end of the second handle lever  233  is hung in the hanging hook  211   b  and hanging of the hanging protrusion  239  is released. 
     The cover  215  is coupled to the rear side of the flow prevention portion  213  and prevents the insulating material U filled in the first door  40  from penetrating into the space formed between the insulating material U and the flow prevention portion  213 . The cover  215  supports the rear side of the hanging portion  211  so that the hanging portion  211  fixed when the fixing protrusion  213   b  of the flow prevention portion  213  fixing hole is inserted into the fixing hole  211   a  fixing protrusion may be prevented from escaping from the fixing protrusion  213   b.    
     As illustrated in  FIGS. 26 through 28 , the support  220  is accommodated in and coupled to the rear side of the handle  70 , and a support accommodation portion  71  in which the support  220  is accommodated, is disposed in the rear side of the handle  70 . 
     The support  220  includes a housing  221  which is accommodated in and coupled to the support accommodation portion  71  and a rear side of which is opened, and a rear cover  223  coupled to the opened rear side of the housing  221 . 
     A first coupling hole  73  into which the housing  221  is coupled, is disposed in the support accommodation portion  71 , and a second coupling hole  221   a  is disposed in a position of the housing  221  corresponding to the first coupling hole  73  so that the housing  221  may be coupled to the support accommodation portion  71  by the fastening member B. 
     A rotation hole  221   b  into which a rotation shaft  235  of the handle lever  230  that will be described later is rotatably coupled, a first support portion  221   c  that supports one side of a spring S elastically supporting the first handle lever  231 , and a third coupling hole  221   d  into which the rear cover  223  is coupled, are disposed in the housing  221 . 
     The rear cover  223  includes an opening  223   a  opened so that the rear side of the first handle lever  231  that will be described later may be exposed to the outside, a guide portion  223   b  that guides the second handle lever  233  not to be exposed to the outside, and a fourth coupling hole  223   c  disposed in a position corresponding to the third coupling hole  221   d  disposed in the housing  221 . 
     The rear side of the first handle lever  231  is exposed to the outside through the opening  223   a  of the rear cover  223  and thus, a user may pressurize the rear side of the first handle lever  231  exposed to the outside forward by grasping the handle  70 . 
     The guide portion  223   b  causes the second handle lever  233  coupled to the housing  221  not to be exposed to the outside in the space between the handle  70  and the second door  50  to pass through the second door  50  so that the second handle lever  233  may be hung in the fixing unit  210  disposed in the first door  40  and hanging of the second handle lever  233  may be released. 
     The guide portion  223   b  is disposed to have a sufficient space in the vertical direction so that the second handle lever  233  may be moved in the vertical direction. The guide portion  223   b  communicates with the guide  240  buried in the second door  50 . 
     The rear cover  223  is coupled to the housing  221  by using the fastening member B through the third coupling hole  221   d  disposed in the housing  221  and the fourth coupling hole  223   c  disposed in the rear cover  223 . 
     The handle lever  230  is rotatably coupled to the support  220  and is hung in the fixing unit  210 , and hanging of the handle lever  230  is released. 
     The rotation shaft  235  is disposed in the handle lever  230 . The rotation shaft  235  is rotatably coupled to the rotation hole  221   b  disposed in the housing  221  of the support  220  so that the handle lever  230  may be rotated. 
     The handle lever  230  includes the first handle lever  231  disposed to be rotated about the rotation shaft  235  in the forward/backward direction, and a second handle lever  233  that is linked to the first handle lever  231 , is rotated about the rotation shaft  235  in the vertical direction when the first handle lever  231  is rotated in the forward/backward direction, and is hung in the hanging portion  211  of the fixing unit  210  and hanging of the second handle lever  233  is released. 
     When seeing from the rotation shaft  235 , the first handle lever  231  is disposed to extend from the rotation shaft  235  downward so that the front side of the first handle lever  231  is accommodated in the housing  221  of the support  220 . 
     The rear side of the first handle lever  231  is exposed to the outside through the opening  223   a  of the rear cover  223  coupled to the rear side of the housing  221  so that the user may pressurize the first handle lever  231  forward by grasping the handle  70 . 
     A second support portion  237  that supports the spring S is disposed in a lower portion of the first handle lever  231 , and both sides of the spring S are supported by the first support portion  221   c  disposed in the housing  221  and the second support portion  237  of the first handle lever  231 . 
     Since the spring S is disposed in the lower portion of the first handle lever  231 , when the user pressurizes the first handle lever  231 , the first handle lever  231  is rotated about the rotation shaft  235  rearward and compresses the spring S and accumulates an elastic force. 
     When the user takes his/her hand off from the first handle lever  231  in a state in which the first handle lever  231  is pressurized, the first handle lever  231  is rotated about the rotation shaft  235  rearward by the accumulated elastic force of the spring S and is returned to its original position. 
     When seeing from the rotation shaft  235 , the second handle lever  233  is disposed to extend from the rotation shaft  235  rearward. 
     The second handle lever  233  is guided by the guide portion  223   b  of the rear cover  223  and the guide  240  buried in the second door  50  and extends so that the second handle lever  233  may be hung in the fixing unit  210  buried in the front side of the first door  40  and hanging of the second handle lever  233  may be released. 
     The second handle lever  233  is connected to the first handle lever  231 . When the user pressurizes the first handle lever  231  to be rotated about the rotation shaft  235  forward, the second handle lever  233  is rotated about the rotation shaft  235  downward. 
     The hanging protrusion  239  is disposed on an end of the second handle lever  233 . The hanging protrusion  239  causes the second handle lever  233  to be hanging-released from the hanging hook  211   b  of the fixing unit  210  when the second handle lever  233  is rotated about the rotation shaft  235  downward. 
     As illustrated in  FIGS. 29 and 31 , the guide  240  is buried in the second door  50 , communicates with the guide portion  223   b  disposed in the rear cover  223  of the support  220 , and guides the second handle lever  233  to pass through the second door  50 . 
     As described above, the latch unit  200  includes the housing  221  coupled to the handle  70 , the handle lever  230  coupled to the housing  221 , the fixing unit  210  buried in the first door  40 , and the guide  240  buried in the second door  50 . As illustrated in  FIG. 30 , both ends of the handle  70  are configured to be inserted into and coupled to the coupling member  57  disposed at the front side of the second door  50  by using a sliding method. Thus, even when the refrigerator is put on the market in a state in which the handle  70  is separated from the second door  50  without the need of coupling the handle  70  to the second door  50 , the user may easily couple the handle  70  to the second door  50  and use the refrigerator. 
     Since the housing  221  and the handle lever  230  of the latch unit  200  are coupled to the handle  70  and the fixing unit  210  and the guide  240  are buried in the first door  40  and the second door  50 , respectively, by coupling the handle  70  to the second door  50 , the latch unit  200  may be used without performing a separate assembly operation so that the refrigerator may be put on the market in the state in which the handle  70  is separated from the second door  50  and then the user may couple the handle  70  to the second door  50  and use the refrigerator. 
     Since the refrigerator may be put on the market in the state in which the handle  70  is separated from the second door  50 , the refrigerator may be easily transported, and damage of the handle  70  when the refrigerator is transported may be prevented. 
     Next, an operation of the latch unit  200  will be described with reference to  FIGS. 31 through 34 . 
     As illustrated in  FIG. 31 , when both the first door  40  and the second door  50  are closed, the hanging protrusion  239  of the second handle lever  233  is hung in the hanging hook  211   b  of the fixing unit  210 . Thus, the second door  50  is fixed to the first door  40 , and the user opens the second door  50  by grasping the handle  70  so that the first door  40  and the second door  50  may be opened together. 
     As illustrated in  FIG. 32 , when the user pressurizes the first handle lever  231  forward, the first handle lever  231  is rotated about the rotation shaft  235  forward, and the second handle lever  233  is rotated about the rotation shaft  235  downward. 
     When the second handle lever  233  is rotated about the rotation shaft  235  downward, hanging of the hanging protrusion  239  disposed on the end of the second handle lever  233  is released from the hanging hook  211   b . Thus, when fixing of the second door  50  to the first door  40  is released and the user opens the second door  50  by grasping the handle  70 , as illustrated in  FIG. 33 , only the second door  50  is opened. 
     When the user takes his/her hand off from the handle  70  in a state in which only the second door  50  is opened, as illustrated in  FIG. 34 , the first handle lever  231  is rotated about the rotation shaft  235  rearward by the elastic force of the spring S, and the second handle lever  233  is rotated about the rotation shaft  235  upward and is returned to its original state. 
     Although not shown, when the user closes the second door  50  in the state in which only the second door  50  is opened, if the user pressurizes the first handle lever  231  by grasping the handle  70 , the first handle lever  231  is rotated about the rotation shaft  235  forward, and the second handle lever  233  is rotated about the rotation shaft  235  downward. Thus, when the second door  50  is closed in the above state, the hanging protrusion  239  of the second handle lever  233  is accommodated in the accommodation portion  213   c  of the fixing unit  210 . 
     When the user takes his/her hand off from the second handle lever  233  in a state in which the hanging protrusion  239  of the second handle lever  233  is accommodated in the accommodation portion  213   c , due to the elastic force of the spring S, the first handle lever  231  is rotated about the rotation shaft  235  rearward, and the second handle lever  233  is rotated about the rotation shaft  235  upward, and the hanging protrusion  239  is hung in the hanging hook  211   b.    
     When the second door  50  is closed in the state in which only the second door  50  is opened, if the user closes the second door  50  by grasping the handle  70  without pressurizing the first handle lever  231 , the hanging protrusion  239  of the second handle lever  233  is in contact with the hanging hook  211   b.    
     When the second door  50  is further pushed to be closed in a state in which the hanging protrusion  239  is in contact with the hanging hook  211   b , the second handle lever  233  is rotated about the rotation shaft  235  downward, and the second door  50  is closed in a state in which the first handle lever  231  is rotated about the rotation shaft  235  forward. 
     When the second door  50  is closed, the first handle lever  231  is rotated about the rotation shaft  235  rearward due to the elastic force of the spring S, the second handle lever  233  is rotated about the rotation shaft  235  upward, and the hanging protrusion  239  is hung in the hanging hook  211   b.    
     As illustrated in  FIG. 2 , when only the second door  50  is opened and the first door  40  is closed, at least one lamp  320  may be installed at sidewalls of the opening  41 , as illustrated in  FIG. 35 , so that the user may easily identify food stored in the door guard  33  disposed in the opening  41  of the first door  40 . 
     As illustrated in  FIG. 2  and  FIGS. 36 through 41 , since the refrigerator compartment door  30  having the double door structure of the pair of refrigerator compartment doors  30  includes the first door  40  and the second door  50 , both the first door  40  and the second door  50  have small thicknesses. 
     The insulating material U is filled in the second door  50 . As a larger amount of insulating material U is filled in the second door  50 , an insulating property of the second door  50  is improved. Thus, the thickness of the second door  50  needs to be increased so as to improve the insulating property of the second door  50  having a small thickness. However, for the reason of esthetic appealing, the pair of refrigerator compartment doors  30  are required to be balanced. Thus, instead of increasing the thickness of the second door  50 , a vacuum insulation panel (VIP) V may be filled in the second door  50  so as to supplement the insulating property of the insulating material U. 
     The first door  40  includes a cabinet  48  that constitutes an exterior, and an internal injection-molded body  49  that constitutes the sidewalls of the opening  41 . The insulating material U is foamed between the cabinet  48  and the internal injection-molded body  49 . 
     Since the first door  40  has a small thickness and is disposed in a rectangular shape having the opening  41 , insulating performance of the first door  40  may be reduced, and rigidity of the first door  40  is lowered so that the first door  40  may be deformed by the weight of the first door  40  and a load of a material stored in the door guard  33  disposed in the opening  41 . 
     In order to supplement lowered rigidity of the first door  40 , a reinforcement frame  350  may be disposed between the cabinet  48  and the internal injection-molded body  49 . 
     The reinforcement frame  350  includes an upper reinforcement frame  351  that is disposed at a front side of the internal injection-molded body  49 , supplements rigidity of the first door  40 , and is coupled to an upper portion of the internal injection-molded body  49 , a lower reinforcement frame  353  coupled to a lower portion of the internal injection-molded body  49 , a first side reinforcement frame  355  disposed at the left side of the first door  40  that is a portion to which the handle  70  is coupled, of both sides of the reinforcement frame  350 , and a second side reinforcement frame  357  disposed at the right side of the first door  40  that is an opposite side to the left side of the first door  40 . 
     The upper reinforcement frame  351  and the lower reinforcement frame  353  are inserted into and coupled to coupling ribs  49   a  disposed in the upper and lower portions of the internal injection-molded body  49 , respectively. 
     In order to fix the first side reinforcement frame  355  and the second side reinforcement frame  357  disposed on both sides of the reinforcement frame  350 , fixing members  360  bent in a ‘ ’ shape are inserted into and coupled to both ends of each of the upper reinforcement frame  351  and the lower reinforcement frame  353 . 
     One side of each of the fixing members  360  disposed in the upper portion of the internal injection-molded body  49  is inserted into and coupled to the upper reinforcement frame  351 . The other side of each of the fixing members  360  is inserted into and coupled to a top end of the first side reinforcement frame  355  and a top end of the second side reinforcement frame  357 . 
     One side of each of the fixing members  360  disposed in the lower portion of the internal injection-molded body  49  is inserted into and coupled to the lower reinforcement frame  353 . The other side of each of the fixing members  360  is inserted into and coupled to a bottom end of the first side reinforcement frame  355  and a bottom end of the second side reinforcement frame  357 . 
     Thus, the first side reinforcement frame  355  and the second side reinforcement frame  357  may be fixed to the upper reinforcement frame  351  and the lower reinforcement frame  353  by using the fixing members  360 . 
     Since the fixing units  210  of the latch unit  200  coupled to the handle  70  are buried in the left side of the first door  40  in which the first side reinforcement frame  355  is disposed, an auxiliary reinforcement frame  359  may be additionally disposed so as to further reinforce rigidity. 
     The auxiliary reinforcement frame  359  may be inserted into and fixed to fixing ribs  48   a  disposed on the right side of the cabinet  48  and may be disposed to be placed at an outer side than the first side reinforcement frame  355 . 
     Although not shown, like in the second door  50 , the VIP V may be filled in the first door  40  so as to improve an insulating property of the first door  40 . 
     As illustrated in  FIGS. 38 and 43 , at least one lamp installation hole  42  is disposed in the internal injection-molded body  49  so as to install the lamp  320 . 
     At least one lamp fixing member  310  is disposed between the cabinet  48  and the internal injection-molded body  49  so as to fix the lamp  320 . 
     The lamp fixing member  310  is fixed to the internal injection-molded body  49  so as to correspond to the position of the lamp installation hole  42  disposed in the internal injection-molded body  49  before the insulating material U is foamed between the cabinet  48  and the internal injection-molded body  49 . When the lamp fixing member  310  is fixed to the internal injection-molded body  49 , the insulating material U is foamed between the cabinet  48  and the internal injection-molded body  49 . 
     The lamp fixing member  310  includes a seating portion  311  on which the lamp  320  is seated, a plurality of fixing hooks  313  that fix the lamp  320  seated on the seating portion  311 , ribs  315  that are disposed on upper and right and left side edges of the lamp fixing member  310  and prevents the insulating material U from penetrating into the seating portion  311 , and a wire guide portion  317  that guides a wire W for supplying power so that the lamp  320  may emit light, as illustrated in  FIG. 44 . 
     When the lamp fixing member  310  is fixed to the internal injection-molded body  49  and the insulating material U is foamed between the cabinet  48  and the internal injection-molded body  49 , the lamp  320  is seated on the seating portion  311  of the lamp fixing member  310  through the lamp installation hole  42 . 
     When the lamp  320  is seated on the seating portion  311 , the lamp  320  is fixed to the seating portion  311  by using the plurality of fixing hooks  313 . 
     The ribs  315  may be disposed on the upper and right and left side edges of the lamp fixing member  310  so as to prevent the insulating material U from penetrating into the seating portion  311  through a space between the lamp fixing member  310  and the internal injection-molded body  49  when the insulating material U is foamed between the cabinet  48  and the internal injection-molded body  49  after the lamp fixing member  310  is fixed to the internal injection-molded body  49 . 
     Although the ribs  315  are disposed on the upper and right and left side edges of the lamp fixing member  310 , embodiments of the present invention are not limited thereto. The ribs  315  may be disposed on the internal injection-molded body  49  in which the lamp fixing member  310  is disposed, and a separate structure may be disposed between the upper and right and left side edges of the lamp fixing member  310  and the internal injection-molded body  49  so as to prevent penetration of the insulating material U. 
     As illustrated in  FIG. 45 , an opening/closing detection sensor  330  is disposed in the hinge unit  100  disposed in the upper portion of the main body  10  so as to detect opening/closing of the first door  40 , and a sensor detection unit  340  is disposed in the upper portion of the second door  50  to correspond to the opening/closing detection sensor  330  so as to transfer the result of detection regarding whether the second door  50  is opened/closed, to the opening/closing detection sensor  330 . 
     A hinge cover  101  (see  FIG. 1 ) that covers the hinge unit  100  not to be exposed to the outside, is disposed in an upper portion of the hinge unit  100 , and electronic apparatus components  103  are accommodated in the hinge cover  101  so as to control an operation of the refrigerator. 
     The opening/closing detection sensor  330  disposed in the hinge unit  100  is connected to the electronic apparatus components  103 , and the electronic apparatus components  103  and the lamp  320  are connected to each other by using the wire W so that the opening/closing detection sensor  330  may detect whether the first door  40  is opened/closed and may transfer the result of detection to the electronic apparatus components  103  and the electronic apparatus components  103  supply power to the lamp  320  by using the wire W or cut off the supply of power. 
     The wire W that connects the electronic apparatus components  103  and the lamp  320  is connected to the electronic apparatus components  103  and is guided into the main body  10  through the first hinge hole  44 , as illustrated in  FIG. 45 . The wire W guided into the main body  10  is guided by the wire guide portion  317  disposed in the lamp fixing member  310  and is connected to the lamp  320 , as illustrated in  FIG. 46 . 
     The sensor detection unit  340  is disposed in the upper portion of the second door  50 , and the opening/closing detection sensor  330  detects a distance at which the sensor detection unit  340  is spaced apart from the opening/closing detection sensor  330 , and causes power to be supplied to the lamp  320  or to cut off the supply of power depending on whether the second door  50  is opened/closed. 
     An operation of the lamp  320  depending on whether each of the first door  40  and the second door  50  is opened, will now be described. 
     When the first door  40  is opened, the opening/closing detection sensor  330  detects opening of the first door  40  and transfers the result of detection to the electronic apparatus components  103 , and the electronic apparatus components  103  supply power to the lamp  320  by using the wire W so that the lamp  320  may emit light. 
     Since, when the first door  40  is opened, the first door  40  is distant from the refrigerator compartment  21 , the user cannot easily identify food stored in the door guard  33  disposed in the opening  41  by using only light emitted from an inside of the refrigerator compartment  21 . However, when the lamp  320  disposed on the sidewalls of the opening  41  emits light, the user may easily identify food stored in the door guard  33  disposed in the opening  41  so that, even when there is no light around the refrigerator, the user does not feel inconvenience. 
     When the first door  40  is closed, the opening/closing detection sensor  330  detects closing of the first door  40  and transfers the result of detection to the electronic apparatus components  103 . The electronic apparatus components  103  cut off power supplied to the lamp  320  by using the wire W. 
     When the second door  50  is opened, the opening/closing detection sensor  330  detects a distance at which the sensor detection unit  340  is spaced apart from the opening/closing detection sensor  330 , and transfers the result of detection that the second door  50  is opened, to the electronic apparatus components  103 , and the electronic apparatus components  103  supply power to the lamp  320  by using the wire W so that the lamp  320  may emit light. 
     When the second door  50  is opened, the user may identify food stored in the door guard  33  disposed in the opening  41  of the first door  40  by using light emitted from the inside of the refrigerator compartment  21 . However, when food or an article having a large height is disposed in the refrigerator compartment  21 , light emitted from the inside of the refrigerator compartment  21  is cut off, and the user may not easily identify food stored in the door guard  33 . However, when the lamp  320  disposed on the sidewalls of the opening  41  emits light, the user may easily identify food stored in the door guard  33 . 
     When the second door  50  is closed, the opening/closing detection sensor  330  detects a distance between the opening/closing detection sensor  330  and the sensor detection unit  340  and transfers the result of detection that the second door  50  is closed, to the electronic apparatus components  103 , and the electronic apparatus components  103  cut off power supplied to the lamp  320  by using the wire W. 
     As illustrated in  FIG. 1 , the freezer compartment door  60  is configured as a drawer type door that moves in the forward/backward direction by using the sliding method. 
     A storing unit  400  is coupled to a rear side of the freezer compartment door  60 . The storing unit  400  is inserted into and drawn from the inside of the freezer compartment  23  by using the sliding method. 
     In order to guide the storing unit  400  to be inserted into and drawn from the inside of the freezer compartment  23 , a guide rail  13  is coupled to both sidewalls of the inside of the freezer compartment  23  in which the storing unit  400  is accommodated. 
     As illustrated in  FIG. 1  and  FIGS. 47 and 48 , the storing unit  400  includes a panel  410  coupled to the rear side of the freezer compartment door  60 , a storage box  420  which is disposed at a rear side of the panel  410  and in which food is stored, a slide rail  430  that is coupled to the rear side of the panel  410 , supports a lower portion of sides of the storage box  420 , and is guided by the guide rail  13 , a hanger  440  that connects the panel  410  and the slide rail  430 , and at least one tilting adjustment unit  450  that adjusts the hanger  440  to be tilted from the slide rail  430 . 
     The hanger  440  includes a panel coupling portion  441  coupled to the panel  410  and a rail coupling portion  443  coupled to the slide rail  430 . 
     As illustrated in  FIGS. 49 and 50 , a first fastening member insertion hole  445  through which the hanger  440  and the slide rail  430  are coupled to each other, is disposed in the rail coupling portion  443 . A second fastening member insertion hole  431  is disposed in the slide rail  430  to correspond to the first fastening member insertion hole  445 , and the hanger  440  and the slide rail  430  are coupled to each other by using the fastening member B inserted into the first fastening member insertion hole  445  and the second fastening member insertion hole  431 . 
     The first fastening member insertion hole  445  is disposed in the center of the rail coupling portion  443 . A first tilting adjustment hole  447  and a second tilting adjustment hole  449  into which the tilting adjustment unit  450  is inserted, are disposed in a front end and a rear end of the rail coupling portion  443 . 
     A first fixing groove  433  and a second fixing groove  435  into which the tilting adjustment unit  450  inserted into the first tilting adjustment hole  447  and the second tilting adjustment hole  449  is rotatably fixed to prevent from moving, are disposed in the slide rail  430  to correspond to the first tilting adjustment hole  447  and the second tilting adjustment hole  449 . 
     Since the hanger  440  and the slide rail  430  are coupled in an upper portion of the slide rail  430 , the tilting adjustment unit  450  inserted into the first tilting adjustment hole  447  and the second tilting adjustment hole  449  disposed in the rail coupling portion  443  is inserted in the upper portion of the rail coupling portion  443 . The first fixing groove  433  and the second fixing groove  435  disposed in the slide rail  430  are disposed in a top surface of the slide rail  430 , and a part of a bottom end of the tilting adjustment unit  450  inserted into the first tilting adjustment hole  447  and the second tilting adjustment hole  449  is inserted into the first fixing groove  433  and the second fixing groove  435  and is fixed thereto. 
     Next, an operation in which the hanger  440  is tilted from the slide rail  430  by using the tilting adjustment unit  450 , will be described with reference to  FIGS. 51 through 53 . 
     In order to allow the hanger  440  to be tilted from the slide rail  430  by using the tilting adjustment unit  450 , when tilting is finished after removing the fastening member B that couples the hanger  440  and the slide rail  430  each other, the fastening member B needs to be fastened again. Thus, in the drawings that illustrate an operation in which the hanger  440  is tilted from the slide rail  430  by using the tilting adjustment unit  450 , the fastening member B, and the first fastening member insertion hole  445 , and the second fastening member insertion hole  431  into which the fastening member B is inserted, are deleted. 
     When sealing of a bottom end of the freezer compartment door  60  is defective and cold air in the freezer compartment  23  leaks toward the outside, in order to improve defective sealing, when the tilting adjustment unit  450  inserted into the first tilting adjustment hole  447  is rotated in the state of  FIG. 45 , as illustrated in  FIG. 46 , the bottom end of the tilting adjustment unit  450  is rotatably fixed into the first fixing groove  433 . Thus, the first tilting adjustment hole  447  is moved in an upward direction of the tilting adjustment unit  450  and thus, the front end of the rail coupling portion  443  is spaced apart from the slide rail  430  and is rotated about the second tilting adjustment hole  449  upward. 
     When the hanger  440  is rotated about the second tilting adjustment hole  449  upward, in the drawings, the panel  410  coupled to the hanger  440  is rotated clockwise. 
     When the panel  410  is rotated clockwise, the freezer compartment door  60  to which the panel  410  is coupled, is rotated clockwise. Thus, the bottom end of the freezer compartment door  60  is moved in a downward direction compared to a case before the freezer compartment door  60  is rotated so that defective sealing of the bottom end of the freezer compartment door  60  may be prevented. 
     When sealing of the top end of the freezer compartment door  60  is defective and cold air in the freezer compartment  23  leaks toward the outside, in order to improve defective sealing, when the tilting adjustment unit  450  inserted into the second tilting adjustment hole  449  is rotated in the state of  FIG. 45 , as illustrated in  FIG. 47 , the bottom end of the tilting adjustment unit  450  is rotatably fixed into the second fixing groove  435 . Thus, the second tilting adjustment hole  449  is moved in the upward direction of the tilting adjustment unit  450  and thus, a rear end of the rail coupling portion  443  is spaced apart from the slide rail  430  and rotated about the first tilting adjustment hole  447  upward. 
     When the hanger  440  is rotated about the first tilting adjustment hole  447  upward, in the drawings, the panel  410  coupled to the hanger  440  is rotated counterclockwise. 
     When the panel  410  is rotated counterclockwise, since the freezer compartment door  60  to which the panel  410  is coupled, is rotated counterclockwise, the top end of the freezer compartment door  60  is moved in an upward direction compared to the case before the freezer compartment door  60  is rotated so that defective sealing of the top end of the freezer compartment door  60  may be prevented. 
     Next, another embodiment in which positions of the tilting adjustment hole and the fixing groove are changed, will be described. 
     As illustrated in  FIG. 54 , a first fastening member insertion hole  475  through which a hanger  470  and a slide rail  460  are coupled to each other, is disposed in a rail coupling portion  473 , and a second fastening member insertion hole  461  is disposed in the slide rail  460  to correspond to the first fastening member insertion hole  475  so that the hanger  470  and the slide rail  460  may be coupled to each other by using the fastening member B inserted into the first fastening member insertion hole  475  and the second fastening member insertion hole  461 . 
     The first fastening member insertion hole  475  is disposed in the center of the rail coupling portion  473 . A first tilting adjustment hole  463  and a second tilting adjustment hole  465  into which the tilting adjustment unit  450  is inserted, are disposed in the slide rail  460  in the position corresponding to the front end and the rear end of the rail coupling portion  473 . 
     A first fixing groove  477  and a second fixing groove  479  into which the tilting adjustment unit  450  inserted into the first tilting adjustment hole  463  and the second tilting adjustment hole  465  is rotatably fixed to prevent from moving, are disposed in the rail coupling portion  473  in positions corresponding to the first tilting adjustment hole  463  and the second tilting adjustment hole  465 . 
     Since the hanger  470  and the slide rail  460  are coupled in an upper portion of the slide rail  460 , the tilting adjustment unit  450  inserted into the first tilting adjustment hole  463  and the second tilting adjustment hole  465  disposed in the slide rail  460  is inserted in the lower portion of the slide rail  460 . The first fixing groove  477  and the second fixing groove  479  disposed in the rail coupling portion  473  are disposed in a bottom surface of the rail coupling portion  473 , and a part of a top end of the tilting adjustment unit  450  inserted into the first tilting adjustment hole  463  and the second tilting adjustment hole  465  is inserted into the first fixing groove  477  and the second fixing groove  479  and is fixed thereto. 
     An operation in which the hanger  470  is tilted from the slide rail  460  by using the tilting adjustment unit  450 , is merely different from the operation illustrated in  FIGS. 45 through 47  in positions of the first tilting adjustment hole  463  and the second tilting adjustment hole  465  and positions of the first fixing groove  477  and the second fixing groove  479 . Since, when the tilting adjustment unit  450  inserted into the first tilting adjustment hole  463  is rotated, the hanger  470  is rotated about the second tilting adjustment hole  465  upward and when the tilting adjustment unit  450  inserted into the second tilting adjustment hole  465  is rotated, the hanger  470  is rotated about the first tilting adjustment hole  463  upward, a detailed description of the operation will be omitted. 
     As illustrated in  FIG. 55 , a first fastening member insertion hole  495  through which a hanger  490  and a slide rail  480  are coupled to each other, is disposed in a rail coupling portion  493 . A second fastening member insertion hole  481  is disposed in the slide rail  480  to correspond to the first fastening member insertion hole  495  so that the hanger  490  and the slide rail  480  may be coupled to each other by using the fastening member B inserted into the first fastening member insertion hole  495  and the second fastening member insertion hole  481 . 
     The first fastening member insertion hole  495  is disposed in the center of the rail coupling portion  493 . A second tilting adjustment hole  497  into which the tilting adjustment unit  450  is inserted, is disposed in the rear end of the rail coupling portion  493 , and a first tilting adjustment hole  483  into which the tilting adjustment unit  450  is inserted, is disposed in the slide rail  480  in a position corresponding to the front end of the rail coupling portion  493 . 
     A first fixing groove  499  into which the tilting adjustment unit  450  inserted into the first tilting adjustment hole  483  is rotatably fixed, is disposed in the front end of the rail coupling portion  493  to correspond to a position corresponding to the first tilting adjustment hole  483 . The second fixing groove  485  into which the tilting adjustment unit  450  inserted into the second tilting adjustment hole  497  is rotatably fixed, is disposed in the slide rail  480  in a position corresponding to the second tilting adjustment hole  497 . 
     Since the hanger  490  is coupled in an upper portion of the slide rail  480 , the tilting adjustment unit  450  is inserted into a lower portion of the first tilting adjustment hole  483  disposed in the slide rail  480 , and the tilting adjustment unit  450  is inserted into an upper portion of the second tilting adjustment hole  497  disposed in the rail coupling portion  493 . 
     The first fixing groove  499  disposed in the rail coupling portion  493  is disposed in a bottom surface of the rail coupling portion  493  so that a part of a top end of the tilting adjustment unit  450  inserted into the first tilting adjustment hole  483  may be inserted into and fixed into the first fixing groove  499 . The second fixing groove  485  disposed in the slide rail  480  is disposed in a top surface of the slide rail  480  so that a part of a bottom end of the tilting adjustment unit  450  inserted into the second tilting adjustment hole  497  may be inserted into and fixed into the second fixing groove  485 . 
     An operation in which the hanger  490  is tilted from the slide rail  480  by using the tilting adjustment unit  450 , is merely different from the operation illustrated in  FIGS. 45 through 47  in positions of the first tilting adjustment hole  483  and the second tilting adjustment hole  497  and positions of the first fixing groove  499  and the second fixing groove  485 . Since, when the tilting adjustment unit  450  inserted into the first tilting adjustment hole  483  is rotated, the hanger  490  is rotated about the second tilting adjustment hole  497  upward and when the tilting adjustment unit  450  inserted into the second tilting adjustment hole  497  is rotated, the hanger  490  is rotated about the first tilting adjustment hole  483  upward, a detailed description of the operation will be omitted. 
     As described above, in accordance with embodiments of the present invention, when a door is opened, visibility of food stored in a door guard can be improved. 
     As is apparent from the above, the door of the refrigerator have an enhanced adhering force so that the leaking of cold air is prevented, and when the second door is fully opened, the second door is prevented from colliding with a lateral side of the main body. 
     Although a few embodiments of the present invention have been shown and described, it would be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the claims and their equivalents.