Patent Publication Number: US-11047612-B2

Title: Built-in refrigerator including wire cover unit

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     The present application is a continuation of U.S. patent application Ser. No. 15/861,591 filed on Jan. 3, 2018, which is related to and claims priority to Korean Patent Application No. 10-2017-0000907 filed on Jan. 3, 2017, the disclosures of which are herein incorporated by reference in their entirety. 
    
    
     TECHNICAL FIELD 
     Apparatuses consistent with the present disclosure relate to a built-in refrigerator, and more particularly, to a built-in refrigerator including a wire cover unit of which a portion is configured to move in a sliding manner to reduce friction of a wire due to an opening and closing of a door. 
     BACKGROUND 
     In some refrigerators, wires may be drawn from the body of the refrigerator and connected to the inside of a door to supply power to electronic devices such as a display device, a control panel, and the like of the door and transmit and receive signals to and from the electronic devices. 
     Since certain refrigerators provide an opening and closing function of the door by a hinge motion, a through hole is formed in the central portion of a rotary shaft and the wire is drawn from the through hole to supply the power to the door. 
     In certain refrigerators, however, when the door is opened and closed by using a multi-joint hinge, the door is moved simultaneously with linear motion and a rotary motion. Thereby, as the door is opened and closed, the wire can be pulled otherwise introduce friction with surrounding structures at exposed portions of the wire. 
     As a result, there the wire could be damaged and the sheath of the wire peeled off, and a core of the wire was exposed to the outside, which causes a risk of electric shock accident, and there was a problem in that an appearance was not good. 
     SUMMARY 
     Exemplary embodiments of the present disclosure overcome the above disadvantages and other disadvantages not described above. Also, the present disclosure is not required to overcome the disadvantages described above, and an exemplary embodiment of the present disclosure may not overcome any of the problems described above. 
     To address the above-discussed deficiencies, it is a primary object to provide a built-in refrigerator including a wire cover unit capable of minimizing a damage of a wire by reducing a friction occurring at the wire. 
     According to certain embodiments of the present disclosure, a built-in refrigerator includes a body; a door configured to open and close an inside of the body; a hinge configured to connect the body with the door; and a wire cover unit configured to guide a wire drawn from the body while a portion thereof slides according to an opening and closing of the door. 
     The wire cover unit may include a case configured to store the wire drawn from the body; a sliding member configured to slide from an inside of the case to be drawn to an outside of the case, and to enclose the wire; and a fixing bracket configured to be hinge-connected to the sliding member and coupled to the door. 
     The hinge may be a multi joint hinge, and the fixing bracket may be connected to the door through a portion which is adjacent to the door of the multi-joint hinge. 
     The fixing bracket may include a wire guide that guides the wire drawn from the sliding member to a wire connection terminal which is adjacent to the door. 
     The wire guide may include a pair of protruding pieces configured to be disposed to face each other; and at least two or more fixing protrusions configured to fix the wire disposed between the pair of protruding pieces. 
     The case may include a storing portion configured to store the wire; and a drawing portion configured to guide the sliding member to be drawn. 
     The storing portion may include a wire fixing portion limiting a movement length of the wire. 
     The wire fixing portion may include a protruding member protruding on an inner surface of the storing portion. 
     A plurality of protruding members may be provided, and the wire may be disposed above and below the plurality of protruding members in a zigzag shape. 
     The sliding member may be formed of a soft material. 
     One end of the wire cover unit may be hooked to a top surface of the body, and a portion of a side surface of the wire cover unit may be screwed to the body. 
     The body may include a coupling hole positioned in the top surface, and one end of the wire cover unit may include an inserting protrusion corresponding to a shape of the coupling hole, and the inserting protrusion and the coupling hole may be hooked to each other. 
     The body may be screwed to the wire cover unit in an outward direction from a center of the body. 
     The body may include a body screw groove protruding from the body, the wire cover unit may include a cover screw groove in a side surface of the wire cover unit corresponding to the body screw groove, and a screw may be fastened to the body screw groove and the cover screw groove. 
     The wire cover unit may include a plurality of protruding portions which are linearly in contact with a portion which is in contact with the wire in a length direction of the wire. 
     According to another aspect of the present disclosure, a built-in refrigerator includes a body; a door configured to open and close an inside of the body; a multi joint hinge configured to connect the body with the door; a case configured to store the wire drawn from the body; and a sliding member configured to slide from an inside of the case to be drawn to an outside of the case, and to enclose the wire which is hinge-coupled to the door. 
     The storing portion may include a plurality of protruding portions which can be linearly in contact with a portion which is in contact lengthwise with the wire. 
     One end of the case may be hooked to a top surface of the body, and a portion of a side surface of the case may be screwed to the body. 
     The body and the case may be screwed to each other in an outward direction of the body from the center of the body. 
     Before undertaking the DETAILED DESCRIPTION below, it may be advantageous to set forth definitions of certain words and phrases used throughout this patent document: the terms “include” and “comprise,” as well as derivatives thereof, mean inclusion without limitation; the term “or,” is inclusive, meaning and/or; the phrases “associated with” and “associated therewith,” as well as derivatives thereof, may mean to include, be included within, interconnect with, contain, be contained within, connect to or with, couple to or with, be communicable with, cooperate with, interleave, juxtapose, be proximate to, be bound to or with, have, have a property of, or the like. 
     Definitions for certain words and phrases are provided throughout this patent document, those of ordinary skill in the art should understand that in many, if not most instances, such definitions apply to prior, as well as future uses of such defined words and phrases. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWING 
       For a more complete understanding of the present disclosure and its advantages, reference is now made to the following description taken in conjunction with the accompanying drawings, in which like reference numerals represent like parts: 
         FIG. 1  illustrates a perspective view of a built-in refrigerator including a wire cover unit according to certain embodiments of the present disclosure; 
         FIG. 2  illustrates a plan view of a door of a built-in refrigerator in a closed state, according to certain embodiments of the present disclosure; 
         FIG. 3  is a plan view illustrating a state in which the door of the built-in refrigerator including a wire cover unit according to an exemplary embodiment of the present disclosure is opened; 
         FIG. 4  illustrates a perspective view of a wire cover unit according to certain embodiments of the present disclosure; 
         FIGS. 5A and 5B  illustrate cross-sectional views of a wire cover unit and an upper portion of a body of the built-in refrigerator according to certain embodiments of the present disclosure; 
         FIG. 6  further illustrates, through a bottom view, part A shown in  FIG. 5A ; and 
         FIG. 7  further illustrates, through an enlarged cross-sectional view, part B shown in  FIG. 5A . 
     
    
    
     DETAILED DESCRIPTION 
       FIGS. 1A through 7 , discussed below, and the various embodiments used to describe the principles of the present disclosure in this patent document are by way of illustration only and should not be construed in any way to limit the scope of the disclosure. Those skilled in the art will understand that the principles of the present disclosure may be implemented in any suitably arranged system or device. 
     Hereinafter, diverse exemplary embodiments of the present disclosure will be described with reference to the accompanying drawings. However, it is to be understood that technologies mentioned in the present disclosure are not limited to specific exemplary embodiments, but include all modifications, equivalents, and substitutions according to exemplary embodiments of the present disclosure. Throughout the accompanying drawings, similar components will be denoted by similar reference numerals. 
     Terms used in the present disclosure may be used only in order to describe specific exemplary embodiments rather than restricting the scope of other exemplary embodiments. Singular forms may include plural forms unless the context clearly indicates otherwise. Terms used in the present specification including technical and scientific terms have the same meanings as those that are generally understood by those skilled in the art to which the present disclosure pertains. Terms defined by a general dictionary among terms used in the present disclosure may be interpreted as meaning that are the same as or similar to meanings within a context of the related art, and are not interpreted as ideal or excessively formal meaning unless clearly defined in the present disclosure. In some cases, terms may not be interpreted to exclude exemplary embodiments of the present disclosure even though they are defined in the present disclosure. 
     Hereinafter, a configuration of a built-in refrigerator according to certain embodiments of the present disclosure will be described with reference to the accompanying drawings. 
       FIG. 1  illustrates a perspective view of a built-in refrigerator including a wire cover unit according to at least one exemplary embodiment of the present disclosure,  FIG. 2  illustrates a plan view of a door of a built-in refrigerator  1  including a wire cover unit according to an exemplary embodiment of the present disclosure in a closed state, and  FIG. 3  illustrates a plan view of a door of a built-in refrigerator including a wire cover unit according to certain embodiments of the present disclosure, in an opened state. 
     Referring to  FIG. 1 , a built-in refrigerator  1  according to certain embodiments of the present disclosure includes a body  10 , a door  20 , a hinge  30 , and a wire cover unit  100 . 
     The built-in refrigerator  1  may be installed on a wall surface or in a space provided between the kitchen cabinetry. The body  10  may include an opened one surface and includes storage space therein. 
     The door  20  is, in some embodiments, connected to one corner of the opened surface of the body  10  by the hinge  30 . The door  20  may include electronic devices (not shown) such as a display, a temperature control button, and the like, and a wire passing hole  22 . The wire for supplying power to the electronic device or transmitting and receiving signals to and from the electronic device supplies the power or transmits and receives the signals to and from the electronic device through the wire passing hole  22 . 
     The hinge  30  may be a multi joint hinge. According to certain embodiments, body frame  35  and a door frame  36  of the hinge  30  are coupled to the body  10  and the door  20 , respectively. Since the built-in refrigerator  1  can be arranged on the wall surface or in the space between the kitchen cabinetry, a side surface of the built-in refrigerator  1  may have almost no free space. Therefore, when a rotary door hinge performing only a rotary motion is used, an outer portion of the door may strike or impinge upon the kitchen cabinetry or the wall surface. 
     In order to solve the above-mentioned problem, it may be preferable that the hinge  30  connecting the body  10  and the door  20  of the built-in refrigerator  1  be a multi joint hinge. 
     The multi-joint may simultaneously perform a forward motion and a rotary motion. That is, when the door  20  is opened, the door  20  may move to a front of the body  10  and perform the rotary motion at the same time. Since the door  20  is operated to be opened while moving to the front of the body  10 , the outer portion of the door  20  may avoid the striking or otherwise impinging upon the kitchen cabinetry or the wall surface. 
     According to certain embodiments, the wire cover unit  100  includes a case  110 , a sliding member  130 , and a fixing bracket  150 . 
     The case  110  can include a space in which the wire drawn from the body  10  is positioned and is coupled to a top surface of the body  10 . In order to couple the case  110  to the top surface of the body  10  without using separate equipment, one end of the case  110  may be hooked to the top surface of the body  10 . A coupling groove  15  of the top surface of the body  10  and an inserting protrusion  112  of a rear surface portion of the case are hooked to each other to fix one end of the case  110  to the top surface of the body  10 . 
     According to certain embodiments of the present disclosure, the top surface of the body  10  and a side surface of the case  110  are connected to each other by one or more screws. It may be undesirable and/or difficult for the built-in refrigerator  1  to incorporate a screw which fastens to the case  110  from a side which is adjacent to the wall surface. The reason is because depending on the overall profile of built-in refrigerator and the installation site, the gap between the side surface of the case  110  and a wall surface may be very narrow. Therefore, a screw  40  may fastened to a body screw groove  11  in a direction from the center of the body  10  toward the wall surface. 
     A portion of the wire drawn from the top surface of the body  10  and positioned in the case  110  may be enclosed by a sliding member  130 . The sliding member  130  can include a space in which the wire is mounted. 
     According to certain embodiments, the sliding member  130  is connected to the fixing bracket  150  by a rotatable hinge  152  (see  FIG. 2 ) at one end thereof and includes an opening  131  (see  FIG. 4 ) so that the wire is drawn in a door direction. The wire drawn from the body  10  may be led into the other end of the sliding member  130  by the sliding member  130 . 
     According to some embodiments, the sliding member  130  is coupled to the door  20  or coupled to the fixing bracket  150  attached to the door  20  through the hinge  152 . If there is no hinge  152  when the door  20  is opened from the body  10  and is rotated, the sliding member may be bent. In such cases, stress may be repeatedly applied to the sliding member  130  from the opening and closing of door  20 , and the sliding member  130  may be subject to fatigue failure. Thus, according to certain embodiments, one end of the sliding member  130  may hingeably coupled to the door  20  or the fixing bracket  150  to be rotatable. Further, since the sliding member  130  may be bent when the door  20  is fully opened, an ABS (acrylonitrile-butadiene-styrene) resin or similarly flexible material may be used. 
     The length of the sliding member  130  may be determined depending on an advancing distance of the door  20 . That is, according to some embodiments, the length of the sliding member  130  is determined to be longer than the advancing distance of the door  20  so that the wire is not exposed to the outside of the case  110 . 
     The fixing bracket  150  may be coupled to the door frame  36  of the multi joint and is connected to the door  20 . The fixing bracket  150  is hingeably connected to the sliding member  130 . Therefore, when the door  20  of the built-in refrigerator is opened, the sliding member  130  may move in conjunction with a forward motion of the door  20 . According to certain embodiments, the fixing bracket  150  includes a wire guide that guides the wire drawn from the opening  131  of the sliding member  130  to a wire connection terminal  172  which is adjacent to the door or the wire passing hole  22  of the door  20 . 
     The wire may minimize its motion through the wire guide. Such a wire guide guides the wire to the wire passing hole  22  of the door  20  or the wire connection terminal  172  which is adjacent to the door  20 . 
     According to some embodiments, the wire cover unit  100  includes the fixing bracket  150 . According to other embodiments, the fixing bracket  150  may be omitted. In a case in which the fixing bracket  150  is omitted, the sliding member  130  may be hingeably connected to the door frame  36  or may be hingeably connected to the door  20 , and the wire passing hole  22  may be formed to be adjacent to the hinge. 
     A structure of the multi joint hinge according to certain embodiments of this disclosure will be now described and an opening and closing operation of the door  20  of the built-in refrigerator will be then described with reference to  FIGS. 2 and 3 . 
     According to certain embodiments, the multi joint hinge  30  includes a plurality of links  31 ,  32 ,  33  and  34 . Referring to  FIG. 3 , the multi joint hinge  30  includes a main body link  31 , a main door link  32 , a sub body link  33 , and a sub door link  34 . Further, the multi joint hinge  30  further includes a body frame  35  attached to the body  10  and a door fixing frame  36  attached to the door  20 . 
     One end of the main body link  31  of the multi joint hinge  30  is hingeably connected to the body frame  35  and the other end of the main body link  31  is connected to one end of the main door link  32 . The other end of the main door link  32  is hingeably connected to the door frame  36 . Although it is described in the drawing of the present disclosure that the other end of the main door link  32  is hingeably connected to the door frame  36 , the other end of the main door link  32  may be configured to slide on the door frame  36 . 
     According to certain embodiments, the multi joint hinge may include only the main body link  31  and the main door link  32  and can present a problem that the opening and closing path of the door varies. According to some embodiments, the opening and closing path can be limited by attaching the sub body link  33  and the sub door link  34 . One end of the sub body link  33  is coupled to the body frame  35  of the body  10  and the other end of the sub body link  33  hingeably connected to the central portion of the sub door link  34 . One end of the sub door link  34  may be hingeably connected to the central portion of the main body link  31  to limit a path of the main body link  31 . The other end of the sub door link  34  is hingeably coupled to the door frame  36 . 
     As described above, according to some embodiments of the present disclosure, the main body link  31 , the main door link  32 , the sub body link  33 , and the sub door link  34  of the multi joint hinge  30  can be organically coupled to each other to allow simultaneous forward and rotational movement along defined path(s). With the organic coupling between the respective links, the multi joint hinge  30  may move the door  20  forward and rotate the door  20  at the same time while limiting a movement direction of the door  20  to one. By the multi joint hinge  30 , it is possible for the door  20  to avoid interference with the wall surface or the furniture closet when the door  20  is opened. 
     Referring to the illustration of certain exemplary embodiments provided by  FIG. 2 , when the door  20  closes the inside of the body  10 , the multi joint hinge  30  is contracted with each other, and the door  20  and an opened one surface of the body  10  face each other. According to certain embodiments, in the case in which the door  20  is closed, an exposed length of the sliding member  130  may at its shortest. In this case, most of the sliding member  130  remains in the case  110 . 
     Referring to  FIG. 3 , according to some embodiments, when the door  20  is opened, the links of the multi joint hinge  30  are relaxed and the door  20  simultaneously performs the forward and rotary motions. Therefore, the distance between the hinge  152  of one end of the sliding member  130  and a portion from which the sliding member  130  of the case  110  is drawn is increased. That is, the sliding member  130  slides from the case  110  and is drawn to the outside. Since the advancing distance, a rotary direction, and a movement direction of the door  20  are limited by the multi joint hinge  30 , the distance of the sliding member  130  drawn from the case  110  is also limited. Since, according to certain embodiments, the length of the sliding member  130  is determined to be larger than a distance at which the sliding member  130  is maximally drawn, the entirety of the sliding member  130  need not be drawn to the outside of the case  110 . 
     In  FIG. 3 , a portion indicated by a dotted line illustrates a case in which the door  20  is opened by 90° or more based on the opened surface of the body  10 . In this case, the sliding member  130  may be bent, and the sliding member  130  may be formed of a soft material such as ABS, a rubber, or the like to prevent the sliding member  130  from being damaged due to the bending. 
       FIG. 4  is a perspective view illustrating a wire cover unit  100  according to an exemplary embodiment of the present disclosure. 
     Referring to  FIG. 4 , according to certain embodiments, one end of the sliding member  130  is hingeably connected to the fixing bracket  150 . The opening  131  may be formed in a side surface of the sliding member at one end of the sliding member  130  and the wire  170  is drawn from the opening  131  of the sliding member  130 . 
     In some embodiments, fixing bracket  150  includes a wire guide  151 , and the wire guide  151  guides the wire drawn from the opening  131  to the wire connection terminal  172  which is adjacent to the door  20  or the wire passing hole  22  (see  FIG. 1 ) included in the door. A wire connection terminal  171  which is adjacent to the sliding member  130  and is connectable to the wire connection terminal  172  which is adjacent to the door  20  may be included. The wire connection terminals  171  and  172  may be harness connectors. 
     The wire guide  151  may include a pair of protruding pieces  153  and two or more fixing protrusions  154 . 
     The pair of protruding pieces  153  is disposed on the fixing bracket  150  to face each other. In this case, the wire may be disposed between the pair of protruding pieces  153 . At least two or more fixing protrusions  155  fixing the wire  170  disposed between the pair of protruding pieces  153  may be further disposed on the fixing bracket  150 . 
     The wire  170  drawn from the opening  131  of the sliding member  130  is guided to the wire connection terminal  172  which is adjacent to the door  20  or the wire passing hole  22  by the pair of protruding pieces  153 . In this case, since the wire  170  may be moved when the door  20  is opened and closed, a fixing member for fixing the wire  170  is required. According to certain embodiments the present disclosure, as the fixing member for fixing the wire, the fixing protrusions  154  may be used. A plurality of fixing protrusions  154  are disposed on the fixing bracket  150  and the wire  170  is disposed in a zigzag shape so as to be caught by the plurality of fixing protrusions  154 , thereby limiting a motion of the wire  170  in a planar direction. 
     According to certain embodiments as disclosed herein, wire guide  151  may have auxiliary protrusions  155  protruding from the protruding pieces  153 . The auxiliary protrusions  155  may limit vertical motion of the wire  170 . As described above, the wire guide  151  may have a plurality of protruding pieces  153 , the fixing protrusions  154 , and the like to fix the wire  170  to a top surface of the fixing bracket  150 . The fixing member for fixing is not limited to the protruding pieces  153 , the fixing protrusion  154 , the auxiliary protrusion  155 , or the like, and may include a hook capable of fitting the wire  170 , a through-type member attached to the fixing bracket  150  and enclosing the wire, and the like. 
     According to certain embodiments of the present disclosure, a length L 2  of the sliding member  130  may be determined in consideration of an installation position of the case and the advancing distance of the door  20 . According to certain embodiments, it is desirable that length L 2  of the sliding member  130  be determined to have a margin in which the wire  170  may move so that the wire  170  is not bent inside the case  110  at a position at which the sliding member  130  is retracted, such as when the door  20  is closed. Further, according to some embodiments, the length of the sliding member is determined to be longer than the maximum advancing distance L 1  (see  FIG. 3 ) of the door  20  so that a portion of the sliding member  130  is disposed to be within the drawn portion of the case  110  even at the maximum advancing distance of the door  20 , when the door  20  is opened. 
       FIGS. 5A and 5B  illustrate cross-sectional views of an upper portion of the wire cover unit  100  and the body  10  of the built-in refrigerator  1  according to certain exemplary embodiments of the present disclosure,  FIG. 6  further illustrates, from a bottom view, part A of  FIG. 5A , and  FIG. 7  further illustrates, from an enlarged view, part B of  FIG. 5A . 
     Referring to  FIGS. 5A and 5B , in some embodiments, the case  110  of the wire cover unit  110  and the top surface of the body  10  are coupled to each other.  FIG. 5A  illustrates an arrangement of the sliding member  130  and the wire  170  in a state in which the door  20  is closed and  FIG. 5B  illustrates an arrangement of the sliding member  130  and the wire  170  in a state in which the door  20  is opened. 
     According to certain embodiments of the present disclosure, case  110  includes a storing portion  113  and a drawing portion  114 . The case  110  may store the wire  170  to prevent the wire  170  from being exposed to the outside, and the drawing portion  114  has a shape corresponding to the sliding member  130  so that the sliding member  130  slides to draw the wire  170 . 
     In some embodiments, storing portion  113  stores the wire  170  drawn from the top surface of the body  10 . The storing portion  113  determines a movement position of the wire  170  and includes a wire fixing portion limiting a moving length of the wire  170 . The moving length of the wire  170  is limited by installing the wire fixing portion and this is to prevent the wire  170  from being entangled in the storing portion  113 . The wire fixing portion includes protruding members  115   a ,  115   b , and  115   c  protruding on an inner surface of the storing portion  113 . The protruding members  115   a ,  115   b , and  115   c  may be plural, and the wire fixing portion may include a wire fixing protrusion  116  protruding below a position corresponding to one of the protruding members  115   a ,  115   b , and  115   c . The wire fixing portion may have surfaces of the protruding members  115   a ,  115   b , and  115   c  that are in contact with the wire, which are curved surfaces, to minimize friction with the wire. That is, the protruding members  115   a ,  115   b , and  115   c  of the wire fixing portion may be formed in a cylindrical shape. Further, the protruding members  115   a ,  115   b , and  115   c  of the wire fixing portion may include a roller (not shown) to minimize the friction even in a case in which the motion of the wire  170  occurs in the case  110 . 
     According to some embodiments, wire  170  may be disposed in a zigzag shape above and below the plurality of protruding members  115   a ,  115   b , and  115   c . First to third protruding members  115   a ,  115   b , and  115   c  may be sequentially disposed from a front surface. The wire  170  drawn from the top surface of the body  10  is disposed at upper ends of the first protruding member and third protruding member  115   a  and  115   c , and may be disposed at a lower end of the second protruding member  115   b . According to some embodiments wire  170  is drawn to the outside of the case  110 , since the wire  170  may be caught by the second protruding member  115   b , it is possible to prevent the wire  170  from being disconnected because the wire  170  is drawn without any limitation and force is applied to the wire  170 . Even if the maintenance of the wire  170  is performed, the protruding members  115   a ,  115   b , and  115   c  may prevent the wire  170  from being drawn by a predetermined distance or more, thereby preventing the wire  170  inside the body  10  from being damaged. 
     According to some embodiments, the wire fixing portion includes three protruding members  115   a ,  115   b , and  115   c  as illustrated in  FIG. 5A  and  FIG. 5B , in which case, the maximum drawing distance of the wire  170  is determined by a distance L 3  from the second protruding member  115   b  to a position at which the wire is bent when the door  20  is closed. The wire  170  may be drawn approximately twice as longer as the distance L 3 . Therefore, when the maintenance of the wire  170  is required, in a case in which the wire  170  is separated or is not separated by a connector inside the door  20  or the body  10 , the protruding members  115   a ,  115   b , and  115   c  may be disposed so that the drawing distance of the wire  170  is sufficient, and in a case in which the wire  170  may be separated by the connector at the middle, the protruding members  115   a ,  115   b , and  115   c  may be disposed by taking into account only the drawing distance of the sliding member  130 . 
     In embodiments, in which the wire  170  and the inside of the case  110  are in contact with each other, in order to minimize the friction between the wire  170  and the case  110 , a protruding portion  117  may be provided in a length direction of the case  110  to be linearly in contact with the wire  170  inside the case  110 . Referring to  FIG. 6 , which illustrates, through an enlarged bottom view, part A of  FIG. 5A , an upper bottom of the case  110  has a comb shaped protruding portion  117 . According to some embodiments, the wire  170  is in contact with the case  110 , and the wire  170  is in contact with a tip of the protruding portion  117 . Therefore, a contact area is reduced and the friction between the wire  170  and the case  110  is reduced as compared to a case in which the wire  170  is directly in contact with the case  110 . Since resistance is small during the movement of the wire  170  due to allowing a direction of the protruding portion  117  of the comb-shape to coincide with a movement direction of the wire  170 , it may be possible to prevent the wire from being damaged due to the friction between the wire  170  and the case  110 . 
       FIG. 5B  illustrates a coupled portion between the case  110  and top surface of the body  10  according to some embodiments of the present disclosure. Referring to  FIG. 7 , which illustrates an enlarged view of the coupled portion according to certain embodiments, the top surface of the body  10  has a coupling groove  15  and one end of the case  110  has the inserting protrusion  112  having a shape corresponding to the coupling groove  15 . The inserting protrusion  112  of the case is hooked to the coupling groove  15 . One end portion of the case  110  is hooked to the coupling groove  15  as described above, and the side surface of the case  110  is screwed to the body as described above. A case screw groove  111  which is on the side surface of the case is illustrated in  FIG. 5A  and  FIG. 5B . The case screw groove  111  is disposed at a position corresponding to the body screw groove  11  protruding on the top surface of the body  10 , and the body  10  and the side surface of the case  110  are screwed to the respective screw grooves  11  and  111  externally from the central portion of the body  10 . 
     According to some embodiments, drawing portion  114  is utilized as a passage through which the sliding member  130  is drawn from and led to the outside of the case  110 . Even in the case in which the door  20  is closed, the drawing portion  114  may have a sufficient length so that the sliding member  130  is not exposed. 
     Hereinafter, an operation of the built-in refrigerator  1  according to an exemplary embodiment of the present disclosure will be described with reference to the accompanying drawings. 
     According to certain embodiments, built-in refrigerator  1  is stored in a cabinetry or is installed in a refrigerator storage space of the wall surface. When a strictly rotary hinge, is used in the built-in refrigerator  1 , where door  20  is fully opened, interference between the wall surface or the furniture closet and a movement path of the door  20  occurs, thereby causing a case in which the door  20  is not fully opened. 
     Accordingly, the door  20  of the built-in refrigerator  1  may be connected to the body  10  by the multi joint hinge  30 . Even in the case of the rotary hinge performing only a general rotary motion, there may be movement and exposure of the wire. However, to clearly illustrate features of the wire cover unit  100  of the built-in refrigerator  1  according to certain embodiments of the present disclosure, the operation of the built-in refrigerator  1  the door  20  and the body  10  are connected to each other by the multi joint  30  as illustrated in the drawings. 
     A state in which the door  20  of the built-in refrigerator  1  is closed will be described with reference to  FIGS. 1, 2, 5A and 5B . 
     According to some embodiments, links  31 ,  32 ,  33 , and  34  of the multi-link hinge  30  are contracted to each other. The wire  170  drawn from the top surface of the body  10  of the built-in refrigerator  1  is stored in the storing portion  113  of the case  110 , and a portion of the stored wire  170  is enclosed by the sliding member  130  that slides on the drawing portion  114  of the case  110 . The wire  170  may be drawn through the opening  131  in a door direction of the sliding member  130 , and the drawn wire  170  is guided to the wire passing hole  22  of the door  20  along the guidance of the fixing bracket  150 . The wire  170  may be connected to an electronic device through the wire passing hole  22 , and may supply power to the electronic device such as a display, a light apparatus dial, a lighting of the dial, or the like which is in the door  20 , or transmit and receive signals according to an operation of the display or the dial with a controller (not shown). 
     As illustrated in  FIG. 5A , according to some embodiments, when the door  20  is closed, most of the sliding member  130  is positioned inside the case  110 . The wire  170  is stored in the storing portion  113  of the case  110 , and the protruding members  115   a ,  115   b , and  115   c  are provided to prevent twisting of the wire  170  or entangling between the wires. Since the protruding members  115   a ,  115   b , and  115   c  limit the movement length of the wire  170  according to the opening and closing of the door  20  and only the wire  170  of the limited length moves, the protruding members  115   a ,  115   b , and  115   c  may prevent the twisting or entangling of the wire  170 . 
     A process of opening the door  20  of the built-in refrigerator  1  and a state in which the door  20  of the built-in refrigerator  1  is opened, according to certain embodiments of the present disclosure will be described with reference to  FIGS. 1, 3, 5A and 5B . 
     If the door  20  is opened, the multi joint hinge  30  starts to be relaxed. Since the multi-joint hinge  30  has the respective links  31 ,  32 ,  33 , and  34  which are connected to each other, the movement path of the door  20  is determined as described above. That is, the door fixing frame  36  of the multi joint hinge  30  has one movement path based on the body frame  35 . 
     According to certain embodiments, door  20  performs an advance movement by the multi joint hinge  30  being relaxed. Since the main door link  32  and the sub door link  34  are hinge-connected to the door fixing frame  36 , they involve the rotary movement. Therefore, the door  20  simultaneously performs the advance and rotary movements. 
     According to some embodiments, when the door  20  advances, the sliding member  130  slides in the door direction from the wire cover unit  100  and is drawn by the advanced distance L 1  of the door  20 . Since the length of the sliding member  130  is determined by taking account into the movement distance L 1  of the door  20 , the wire  170  is not exposed between the sliding member  130  and the case  110 . Since the wire  170  is not exposed, friction between an external object and the wire  170  may be reduced, and wear and damage of the wire  170  may be reduced. 
     Further, since the storing portion of the case  110  keeps a sufficient length of wire  170  which may be moved by taking account into the drawn length of the wire  170 , force pulling the wire  170  by the opened door  20 , that is, tensile force applied to the wire  170  may be minimized. Therefore, a damage risk of the wire  170  may be reduced. 
     According to certain embodiments, when the wire  170  moves in the case  110 , the plurality of protruding members  115   a ,  115   b , and  115   c  have the curved surface or are configured as the cylindrical roller, thereby reducing the friction between the plurality of protruding members  115   a ,  115   b , and  115   c  and the wire  170  inside the case  110 . 
     When the door  20  is fully opened, in some embodiments, the door  20  is opened as indicated by the dotted line of  FIG. 3 . A predominantly opened position of the door  20  is determined according to a movement range of the multi joint hinge  30 . When the door  20  is fully opened and an angle between the opened surface of the body  10  and the door  20  is an obtuse angle, the sliding member  130  is bent. If the sliding member  130  is weak in softness, since sliding member  130  may be damaged, it is preferable that the sliding member  130  is formed of a soft material. 
     Hereinafter, an operation of mounting and separating the wire cover unit  110  on and from the built-in refrigerator  1  according to certain embodiments of the present disclosure will be described. 
     In some embodiments, the wire cover unit  100  includes the case  110 , the sliding member  130 , and the fixing bracket  150 . The sliding member  130  and the fixing bracket  150  which are hingeably connected to each other are provided. 
     First, the wire  170  is disposed on the protruding members  115   a ,  115   b , and  115   c  of the case  110  in the zigzag shape, and the margin taking account into the movement length of the wire  170  is stored in the storing portion  113 . A portion of the stored wire  170  is disposed to be exposed to the outside through the drawing portion  114 . 
     Thereafter, in some embodiments, the inserting protrusion  112  of the case  110  is inserted into the coupling groove  15  of the top surface of the body  10  and is hooked thereto. The body screw groove  11  protruding from the body  10  and a corresponding case screw groove  111  are aligned to coincide with each other, and the screw is coupled to the screw grooves  11  and  111  in an outward direction from the center of the body  10 . 
     If the case  110  and the body  10  are fixed, the sliding member  130  can be installed to protect the wire  170  drawn from the case  110 . 
     According to certain embodiments, wire  170  drawn from the case is inserted into the sliding member  130 , and the sliding member  130  slides into the case  110  through the drawing portion  114 . Thereafter, the fixing bracket  150  which is hingeably connected to the sliding member  130  is coupled to the door frame  36 , thereby mounting the wire cover unit  100  in the built-in refrigerator  1 . Thereafter, the wire  170  is connected through the wire connection terminal (harness). 
     An operation of disassembling the wire cover unit  100  may be performed in the reverse order of the mounting operation for maintenance or replacement of the wire  170  provided in the built-in refrigerator  1 . 
     Although the wire cover unit  100  according to an exemplary embodiment of the present disclosure is described as being mounted in the built-in refrigerator  1 , the wire cover unit  100  may be mounted in a device such as a built-in microwave oven, a built-in styler, or the like having a door  20  which includes a device requiring power such as a display or including a dial button requiring transmission and reception of signals. 
     As described above, in some embodiments, the wire cover unit  100  includes the sliding member  130  and the case  110 , and the wire  170  may be drawn through the sliding member  130  in conjunction with the movement of the door  20  according to the motion of the multi joint hinge  30 . Thereby, the external exposure of the wire  170  may be minimized, the damage risk due to the friction with the external object is reduced, and there is an advantage in that an appearance is good. 
     Further, since, according to some embodiments, the wire cover unit has the protruding members  115   a ,  115   b , and  115   c  inside the case  110  and has the protruding portion  117  in the length direction of the case, the friction due to the movement of the wire  170  may be reduced and the damage risk due to the movement of the wire may also be reduced. 
     Although the present disclosure has been described with exemplary embodiments, various changes and modifications may be suggested to one skilled in the art. It is intended that the present disclosure encompass such changes and modifications as fall within the scope of the appended claims.