Patent Publication Number: US-11397045-B2

Title: Refrigerator

Description:
This application is based on and claims priority under 35 U. S. C. § 119 to Korean Patent Application No. 10-2019-0167273 filed on Dec. 13, 2019, in the Korean Intellectual Property Office, the disclosure of which is incorporated herein by reference in its entirety. 
     BACKGROUND 
     1. Field 
     The disclosure relates to a refrigerator, and more particularly, to a refrigerator having a support projection to reduce noise created from racks. 
     2. Discussion of Related Art 
     Refrigerators are devices having a storeroom and a cold air supply for supplying cold air into the storeroom to keep groceries fresh. 
     Temperatures in the storeroom remain within a certain range required to keep the groceries fresh. 
     The storeroom has an open front, which is closed by a door at ordinary times to maintain the temperature of the storeroom. 
     The storeroom is partitioned by a wall into a freezer chamber and a fridge chamber, the freezer and fridge chambers being opened or closed by the respective doors. 
     There are racks installed in the fridge and freezer chambers to divide and separate the fridge and freezer chambers into a plurality of spaces. 
     The racks are removably installed, possibly having separation spaces to the side of the fridge or freezer chamber. The fridge and freezer chambers may tremble because of contraction due to cooling, vibrations from door opening or closed, vibrations from operation of the cold air supply, and the trembling may cause the racks to collide with the inside of the fridge and freezer chambers and make noise. 
     Furthermore, when the rack, the side of which is not supported, may be moved within the separation space formed between the rack and the side of the fridge or freezer chamber, the trembling of the fridge and freezer chambers may make the racks out of position. 
     SUMMARY 
     In accordance with an aspect of the disclosure, a refrigerator includes an outer case, an inner case arranged inside the outer case to define a storeroom, a rack removably arranged in the storeroom, a projection protruding from a side of the inner case, on which to put a side end of the rack, and at least one side supporting projection forming a separation space between the side of the inner case and a side of the rack to prevent the side of the rack from contacting the side of the inner case, wherein the side supporting projection includes a rack contact portion arranged between the side of the rack and the side of the inner case and formed into a curved plane to reduce an area of contact with the side of the rack. 
     The refrigerator may further include a bottom supporting projection formed at the projection to form a separation space between the projection and a bottom side of the rack to prevent contact between the bottom side of the rack and the projection. 
     The bottom supporting projection may include a rack contact portion arranged between the bottom side of the rack and the projection and formed into a curved plane to reduce an area of contact with the bottom side of the rack. 
     The side supporting projection may be formed on the side of the inner case, the bottom supporting projection may be formed on the projection, and the side supporting projection and the bottom supporting projection may be integrally formed. 
     The refrigerator may further include an auxiliary supporting projection formed on the projection to support the bottom side of the rack and arranged in front of the bottom supporting projection. 
     the side supporting projection may be formed to be tilted toward a front of the storeroom such that an end of the side supporting projection is closest to the front of the storeroom, and the side supporting projection may be formed to be tilted toward a rear side of the storeroom such that an end of the side supporting projection is closest to the rear side of the storeroom. 
     the projection and the side supporting projection may be integrally formed with the inner case, and the bottom supporting projection may be integrally formed with the projection. 
     The projection may include a first projection arranged on a left side of the inner case, on which to put a left end of the rack, and a second projection arranged on a right side of the inner case, on which to put a right end of the rack at a height corresponding to the first projection, and the side supporting projection may include a first side supporting projection formed on the left side of the inner case, and a second side supporting projection formed on the right side of the inner case at a height corresponding to the first side supporting projection. 
     The first side supporting projection and the second side supporting projection may be arranged to face each other. 
     The refrigerator may further include a first bottom supporting projection formed at the first projection to form a separation space between the first projection and the bottom side of the rack to prevent contact between the bottom side of the rack and the first projection, and a second bottom supporting projection formed at the second projection to form a separation space between the second projection and the bottom side of the rack to prevent contact between the bottom side of the rack and the second projection. 
     The first side supporting projection and the first bottom supporting projection may be integrally formed, and the second side supporting projection and the second bottom supporting projection may be integrally formed. 
     One of the first side supporting projection and the second side supporting projection may be arranged near a front of the inner case, and the other one may be arranged near a rear side of the inner case. 
     The refrigerator may further include a first bottom supporting projection formed at the first projection to form a separation space between the first projection and the bottom side of the rack to prevent contact between the bottom side of the rack and the first projection, and a second bottom supporting projection formed at the second projection to form a separation space between the second projection and the bottom side of the rack to prevent contact between the bottom side of the rack and the second projection. 
     The first side supporting projection and the first bottom supporting projection may be integrally formed, and the second side supporting projection and the second bottom supporting projection may be integrally formed. 
     In accordance with another aspect of the disclosure, a refrigerator includes an outer case; an inner case arranged inside the outer case to define a storeroom; a rack removably arranged in the storeroom; a first projection formed on a left side of the inner case to allow the rack to be put on the first projection, and having a plurality of bottom supporting projections arranged to contact a bottom side of the rack; a second projection formed on a right side of the inner case, and having a plurality of bottom supporting projections arranged to contact the bottom side of the rack; a first side supporting projection formed on the left side of the inner case to come into contact with a left side of the rack put on the first projection, and having a curved plane to reduce an area of contact with the rack; and a second side supporting projection formed on the right side of the inner case to come into contact with a right side of the rack put on the second projection, and having a curved plane to reduce an area of contact with the rack. 
     One of the first side supporting projection and the second side supporting projection may be arranged near a front of the inner case, and the other one may be arranged near a rear side of the inner case. 
     The refrigerator may further include a third side supporting projection formed on the left side of the inner case, and a fourth side supporting projection formed on the right side of the inner case, and the third side supporting projection may be arranged to face the second side supporting projection, and the fourth side supporting projection may be arranged to face the first side supporting projection. 
     The plurality of bottom supporting projections may be connected to and formed integrally with the plurality of side supporting projections, respectively. 
     In accordance with another aspect of the disclosure, a refrigerator includes an outer case; an inner case arranged inside the outer case to define a storeroom; a rack removably arranged in the storeroom; a plurality of projections formed to protrude from an inner side of the inner case for the rack to be arranged in the storeroom; and a supporting projection formed on an edge of each of the plurality of projections to support a side end of the rack, wherein the supporting projection includes a first rack contact portion contacting a side of the rack and formed into a curved plane to reduce an area of contact with the side of the rack, and a second rack contact portion contacting a bottom side of the rack and formed into a curved plane to reduce an area of contact with the bottom side of the rack. 
     The supporting projection may be formed by integrally connecting a side supporting projection having the first rack contact portion arranged, and connected to the inner case, to a bottom supporting projection having the second rack contact portion arranged, and connected to the projection case are integrally connected. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The above and other objects, features and advantages of the present disclosure will become more apparent to those of ordinary skill in the art by describing in detail exemplary embodiments thereof with reference to the accompanying drawings, in which: 
         FIG. 1  is a perspective view of a refrigerator, according to an embodiment of the disclosure; 
         FIG. 2  shows racks arranged in the refrigerator shown in  FIG. 1 ; 
         FIG. 3  shows a rack removed from a fridge chamber of the refrigerator of  FIG. 1 ; 
         FIG. 4  shows a state in which a rack arranged in the refrigerator shown in  FIG. 1  is supported by a supporting projection; 
         FIG. 5  is a cross-sectional view of the supporting projection shown in  FIG. 4 ; 
         FIG. 6  shows a projection and a supporting projection of the refrigerator shown in  FIG. 1 ; 
         FIG. 7  shows a projection and a side supporting projection of a refrigerator, according to another embodiment of the disclosure; 
         FIG. 8  shows a projection and a side supporting projection of a refrigerator, according to another embodiment of the disclosure; 
         FIG. 9  shows a supporting projection of a refrigerator, according to another embodiment of the disclosure; 
         FIG. 10  is a top view of arrangement of the projection and the supporting projection of the refrigerator shown in  FIG. 1 ; and 
         FIG. 11  is a top view of arrangement of a projection and a supporting projection of a refrigerator, according to another embodiment of the disclosure. 
     
    
    
     DETAILED DESCRIPTION OF EXEMPLARY EMBODIMENTS 
     Embodiments and features as described and illustrated in the disclosure are merely examples, and there may be various modifications replacing the embodiments and drawings at the time of filing this application. 
     Throughout the drawings, like reference numerals refer to like parts or components. For the sake of clarity, the elements of the drawings are drawn with exaggerated forms and sizes. 
     The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the present disclosure. It is to be understood that the singular forms “a,” “&#39;an,” and “the” include plural references unless the context clearly dictates otherwise. It will be further understood that the terms “comprise” and/or “comprising,” when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. 
     The terms including ordinal numbers like “first” and “second” may be used to explain various components, but the components are not limited by the terms. The terms are only for the purpose of distinguishing a component from another. Thus, a first element, component, region, layer or chamber discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the disclosure. Descriptions shall be understood as to include any and all combinations of one or more of the associated listed items when the items are described by using the conjunctive term “˜ and/or ˜,” or the like. 
     The terms “front”, “rear”, “upper”, “lower”, “top”, and “bottom” as herein used are defined with respect to the drawings, but the terms may not restrict the shape and position of the respective components. 
     Reference will now be made in detail to embodiments of the disclosure, which are illustrated in the accompanying drawings, wherein like reference numerals refer to the like elements throughout. 
     The disclosure provides a refrigerator having an enhanced rack supporting structure to reduce noise created from collision between a rack and an inner case. 
     The disclosure also provides a refrigerator having an enhanced rack supporting structure to minimize an extent to which the rack is out of position. 
       FIG. 1  is a perspective view of a refrigerator, according to an embodiment of the disclosure.  FIG. 2  shows racks arranged in the refrigerator shown in  FIG. 1 .  FIG. 3  shows a rack removed from a fridge chamber of the refrigerator of  FIG. 1 .  FIG. 4  shows a state in which a rack arranged in the refrigerator shown in  FIG. 1  is supported by a supporting projection. 
     Referring to  FIGS. 1 to 4 , a refrigerator may include a main body  10 , a storeroom  20  with the front open, which is provided inside the main body  10 , and a door  30  rotationally coupled to the main body  10  to open or close the open front of the storeroom  20 . 
     The main body  10  may include an inner case  11  defining the storeroom  20 , an outer case  12  defining the exterior, and a cold air supply (not shown) for supplying cold air to the storeroom  20 . 
     The cold air supply may include a compressor, a condenser, an expansion valve, an evaporator, a fan, a cold air duct, etc., and insulation  14  is foamed between the inner case  11  and the outer case  12  of the main body  10  to prevent a leak in the cold air. 
     The storeroom  20  is divided by a partition wall  13  into a fridge chamber  21  and a freezer chamber  22 . The fridge chamber  21  and the freezer chamber  22  may be opened or closed by a fridge door  31  and a freezer door  32 , respectively, which are rotationally coupled to the main body  10 , and a plurality of door guards  35  may be installed on the rear sides of the door  30  to contain foods. 
     There may be a plurality of racks  40  provided in the storeroom  20 , which may divide the fridge chamber  21  and freezer chamber  22  into a plurality of spaces. 
     The rack  40  may be removably mounted on a projection  50  formed at the storeroom  20 . Specifically, the projection  50  may be integrally formed with the inner case  11 . The projection  50  may be formed from a protruding portion of the inner case  11 . 
     A plurality of supporting projections  100  including side supporting projections  200  to support the rack  40  may be formed on the inner case  11 . 
     The following description will be focused on the fridge chamber  21 , which, however, may be equally applied to the freezer chamber  22 . 
     The fridge chamber  21  may be shaped like a cuboid, inner surfaces of which are defined by a top plane, a bottom plane, a left side plane, a right side plane, and a rear plane, which are portions of the inner case  11 , and which has an open front that may be opened or closed by the door  30 . 
     The projections  50  may be formed in the plural on each of a left side  11   a  and a right side of the fridge chamber  21 . The projections  50  may make pairs, each pair having one on the left side and the other on the right side of the fridge chamber  21 . That is, multiple pairs of projections  50  may be provided on the left and right sides of the fridge chamber  21 . The projection  50  may refer to a portion protruding horizontally from the side of the fridge chamber  21  or a portion integrally formed with the inside of the fridge chamber  21 . 
     The following description will be focused on the projection  50  formed on the left side  11   a  of the fridge chamber  21 , so the side (or side plane) of the inner case or the fridge chamber  21  may refer to the left side  11   a  of the fridge chamber  21  and the side of the rack  40  may refer to the left side of the rack  40 . 
     The description focused on the projection  50  formed on the left side  11   a  of the fridge chamber  21  may be equally applied to the projection  50  formed on the right side of the fridge  21 , in which case the side (or side plane) of the fridge chamber  21  may refer to the right side of the fridge chamber  21  and the side of the rack  40  may refer to the right side of the rack  40 . 
     The rack  40  may be formed of glass, and may be removably positioned in the fridge chamber  21 . Specifically, the rack  40  may be put inside the fridge chamber  21  through the open front, and placed in position between the top plane and bottom plane of the fridge chamber  21  with left and right ends of the rack  40  supported by a pair of projections  50 . 
     On the side  11   a  of the fridge chamber  21 , a side supporting projection  200  may be formed to support the side of the rack  40  when the rack  40  is put on the projection  50 . The side supporting projection  200  may be formed at a higher level than the projection  50 . The side supporting projection  200  may be located between the side of the rack  40  and the side  11   a  of the storeroom. The side supporting projection  200  may be formed from a protruding portion of the inner case  11 . That is, the side supporting projection  200  may be integrally formed with the inner case  11 . 
       FIG. 5  is a cross-sectional view of the supporting projection shown in  FIG. 4 .  FIG. 6  shows a projection and a supporting projection of the refrigerator shown in  FIG. 1 . 
     Referring to  FIGS. 5 and 6 , the side supporting projection  200  may include a rack contact portion  210  to come into contact with the side of the rack  40  to support the side of the rack  40 . Specifically, the rack contact portion  210  may have the shape of a three dimensional (3D) curved plane swollen toward the side of the rack  40  from the side  11   a  of the storeroom  20 . As compared to a flattened form, the curved form of the rack contact portion  210  may reduce an area of contact with the rack  40 . The rack contact portion  210  may make point contact or line contact with the side of the flattened rack  40 . In other words, when a plane parallel to the rear side of fridge chamber  21  and a plane parallel to the bottom side of the fridge chamber  21  meet the curved rack contact portion  210 , one or two curves may be formed. 
     The side supporting projection  200  may form a separation space to prevent contact between the side of the rack  40  and the side of the fridge chamber  21 , and the side of the rack  40  may be separated from the side  11   a  of the fridge chamber  21  by separation space D 1 . 
     Because of contraction of the fridge chamber  21  due to cooling, deformation of the fridge chamber  21  due to a change in pressure in the fridge chamber  21  when the door is opened or closed, vibrations from impact when the door is opened or closed, vibrations from operation of the cold air supply, etc., the side  11   a  of the fridge chamber  21  and the side of the rack  40  may tremble in a direction of approaching each other, and may collide with each other. In this case, the side supporting projection  200  may make the side of the rack  40  collide with the rack contact portion  210  instead of the side  11   a  of the fridge chamber  21 , thereby minimizing an area of contact and noise from the collision. 
     Furthermore, a movable distance D 2  in the presence of the side supporting projection  200 , that the rack  40  may be moved to the left and right due to trembling, may be smaller than the movable distance D 1  without presence of the side supporting projection  200 . This may minimize an extent to which the rack  40  is out of position due to trembling of the fridge member  21  or rack  40 . 
     At the projection  50 , a bottom supporting projection  300  may be formed to support the bottom side of the rack  40  when the rack  40  is put on the projection  50 . The bottom supporting projection  300  may be located between the bottom side of the rack  40  and the projection  50 . The bottom supporting projection  300  may be formed from a protruding portion of the inner case  11  which forms the projection  50 . Specifically, the bottom supporting projection  300  may be integrally formed with the projection  50  and the inner case  11 . 
     The bottom side supporting projection  300  may include a rack contact portion  310  to come into contact with the bottom side of the rack  40  to support the bottom side of the rack  40 . Specifically, the rack contact portion  310  may have the shape of a 3D curved plane swollen toward the bottom side of the rack  40  from the projection  50 . As compared to a flattened form, the curved form of the rack contact portion  310  may reduce an area of contact with the rack  40 . The rack contact portion  310  may make point contact or line contact with the bottom side of the flattened rack  40 . In other words, when a plane parallel to the rear side of fridge chamber  21  and a plane parallel to the side of the fridge chamber  21  meet the curved rack contact portion  310 , one or two curves may be formed. 
     The bottom supporting projection  300  may form a separation space to prevent the bottom side of the rack  40  from contacting the projection  50 . 
     Accordingly, even when the rack  40  trembles vertically due to vibrations or shocks on the refrigerator, the bottom supporting projection  300  may make the bottom side of the rack  40  collide with the rack contact portion  310  instead of the projection  50 , thereby minimizing an area of contact and noise from the collision. 
     The side supporting projection  200  may be integrally formed with the bottom supporting projection  300 . The side supporting projection  200  may be formed on the side  11   a  of the fridge chamber  21  while the bottom supporting projection  300  may be formed on the projection  50 , and the side supporting projection  200  and the bottom supporting projection  300  may be connected together at an edge where the side of the fridge chamber  21  and the projection  50  join, thereby being provided integrally. The side  11   a  of the fridge chamber  21  and the projection  50  are perpendicular to each other, so the side supporting projection  200  and the bottom supporting projection  300  may be connected at a right angle. The supporting projection  100  may refer to an integral form of the side supporting projection  200  and the bottom supporting projection  300 . 
     As the side supporting projection  200  and the bottom supporting projection  300  are integrally provided, the side supporting projection  200  and the bottom supporting projection  300  may be simultaneously formed in a single molding process, leading to easy production. 
     However, the embodiment of the disclosure is not limited thereto. For example, the side supporting projection  200  and the bottom supporting projection  300  may be formed separately. That is, the side supporting projection  200  and the bottom supporting projection  300  may not be connected. Accordingly, the bottom supporting projection  300  may or may not be placed on a plane parallel to the rear side of the fridge chamber  21  and including the side supporting projection  200 . 
     There may be another example as follows.  FIG. 7  shows a projection and a side supporting projection of a refrigerator, according to another embodiment of the disclosure.  FIG. 8  shows a projection and a side supporting projection of a refrigerator, according to another embodiment of the disclosure. 
     Referring to  FIG. 7 , only the side supporting projection  200  may be formed at the fridge chamber  21 . Hence, the side of the rack  40  may be supported by the side supporting projection  200 , and the bottom side of the rack  40  may directly contact the projection  50 . 
     Alternatively, as shown in  FIG. 8 , the side supporting projection  200  may be formed on the side  11   a  of the fridge chamber  21  and an auxiliary supporting projection  400  may be formed on the projection  50 , so that the side of the rack  40  may be supported by the side supporting projection  200  and the bottom side of the rack  40  may be supported by the auxiliary supporting projection  400 , as will be described below. 
     With this structure, noise reduction may be facilitated by the side supporting projection  200  and the bottom supporting projection  300  having a complicated shape may be omitted, thereby reducing the number of production processes and saving the cost. 
     Turning back to  FIG. 6 , at the projection  50 , the auxiliary supporting projection  400  may be formed to support the bottom side of the rack  40  when the rack  40  is put on the projection  50 . The auxiliary supporting projection  400  may be located between the bottom side of the rack  40  and the projection  50 . The auxiliary supporting projection  400  may be formed from a protruding portion of the inner case  11  that forms the projection  50 . Specifically, the auxiliary supporting projection  400  may be integrally formed with the projection  50  and the inner case  11 . 
     The auxiliary supporting projection  400  may have the same height as the height of the bottom supporting projection  300 . Accordingly, the rack  40  supported by the auxiliary supporting projection  400  and the bottom supporting projection  300  may maintain the horizontal balance. 
     The auxiliary supporting projection  400  may be shaped like a protrusion having the same width as that of the projection  50 . The auxiliary supporting projection  400  may be rounded into a curved plane. Accordingly, the auxiliary supporting projection  400  may minimize an area of contact with the bottom side of the rack  40 . The auxiliary supporting projection  400  may make point contact or line contact with the bottom side of the rack  40 . It is not, however, limited thereto, and the auxiliary supporting projection  400  may have a curved plane having the same shape as the bottom supporting projection  300 . 
     The auxiliary supporting projection  400  may minimize the noise for the same reason with the bottom supporting projection  300 , may be easily produced because of having the simple form, and may distribute the weight of the rack  40  heavily loaded with foods with the bottom supporting projection  300 . 
     On the projection  50 , both the supporting projection  100  and the auxiliary supporting projection  400  may be formed. The auxiliary supporting projection  400  may be located in front of the supporting projection  100 . It is not, however, limited thereto, and the auxiliary supporting projection  400  may be omitted. 
     The supporting projection  100  may have plane symmetry with a plane parallel to the rear side of the fridge chamber  21  and passing through the center of the supporting projection  100 . Specifically, a line passing through the center of the side supporting projection  200  and a line passing through the center of the bottom supporting projection  300  cross at a right angle, and the two lines lie on a plane parallel to the rear side of the fridge chamber  21 . 
     However, the embodiment of the disclosure is not limited thereto.  FIG. 9  shows a supporting projection of a refrigerator, according to another embodiment of the disclosure. 
     Referring to  FIG. 9 , the supporting projection  100  may be asymmetric with respect to a plane parallel to the rear side of the fridge chamber  21 . In other words, the rack contact portion  210  of the side supporting projection  200  and the rack contact portion  310  of the bottom supporting projection  300  may not be arranged on the same plane parallel to the rear side of the fridge chamber  21 . 
     With respect to a straight line extending in the vertical direction of the fridge chamber  21  and crossing the projection  50  at a right angle, a center line a of the side supporting projection  200  may be tilted to the rear side of the fridge chamber  21 . That is, an end of the side supporting projection  200  may lean toward the rear side of the fridge chamber  21  to be closest to the rear side of the fridge chamber  21 . 
     Furthermore, with respect to a straight line perpendicular to the side of the fridge chamber  21 , a center line b of the bottom supporting projection  300  may be tilted to the front of the fridge chamber  21 . That is, an end of bottom side supporting projection  300  may lean toward the front of the fridge chamber  21  to be closest to the front of the fridge chamber  21 . 
     It is not, however, limited thereto, and the center line a of the side supporting projection  200  may lean toward the front of the fridge chamber  21  and the center line b of the bottom supporting projection  300  may lean toward the rear side of the fridge chamber  21 . 
     With the structure, when the rack  40  is put on the projections  50 , the rack contact portion  210  of the side supporting projection  200  and the rack contact portion  310  of the bottom supporting projection  300  contact the rack  40  not simultaneously but one after another, so the movement of the rack  40  may be less interrupted and thus the rack  40  may be easily mounted on the projection  50 . 
       FIG. 10  is a top view of arrangement of the projection and the supporting projection of the refrigerator shown in  FIG. 1 .  FIG. 11  is a top view of arrangement of a projection and a supporting projection of a refrigerator, according to another embodiment of the disclosure. 
     Referring to  FIG. 10 , the single rack  40  may be supported by four of the supporting projections  100 . Specifically, there may be two of the supporting projections  100  arranged near the front of the fridge chamber  21  to support the left and right sides of the rack  40 , and another two of the supporting projections  100  arranged near the rear side of the fridge chamber  21  to support the left and right sides of the rack  40 . 
     The two supporting projections  100  arranged near the front of the fridge chamber  21  may face each other. Specifically, one of the supporting projection  100  formed on the left side  11   a  of the fridge chamber  21  and the other one formed on the right side  11   b  of the fridge chamber  21  may be paired together, and may lie on a plane parallel to the rear side of the fridge chamber  21 . Likewise, the other two of the supporting projections  100  arranged near the rear side of the fridge chamber  21  may be paired together. 
     The arrangement is not, however, limited thereto. For example, although two pairs of the supporting projections  100  are shown in  FIG. 10 , there may be only one pair or three or more pairs of the supporting projections  100  arranged at the fridge chamber  21 . 
     Furthermore, the projections are not limited to the supporting projections  100  as shown in  FIG. 6 , but the side supporting projections  200  as shown in  FIG. 7 , both the auxiliary supporting projections  400  and the side supporting projections  200  as shown in  FIG. 8 , or the supporting projections  100  as shown in  FIG. 9  may be arranged in the same positions. 
     This four-point supporting may prevent left and right sides of the rack  40  near the front of the fridge chamber  21  and left and right sides of the rack  40  near the rear side of the fridge chamber  21  from colliding with the sides  11   a  and  11   b  of the fridge chamber  21  and making noise, and reliably support the rack  40 . 
     It is not, however, limited thereto, and the single rack  40  may be supported by two of the supporting projections  100 . Specifically, as shown in  FIG. 11 , one of the supporting projection  100  may be arranged near the front of the fridge chamber  21  to support one of the left and right sides of the rack  40 , and the other one of the supporting projection  100  may be arranged near the rear side of the fridge chamber  21  to support the other one of the left and right sides of the rack  40 . The two supporting projections  100  may be arranged to form a diagonal when the rack  40  is viewed from above the fridge chamber  21 . 
     The projections are not limited to the supporting projections  100  as shown in  FIG. 6 , but the side supporting projections  200  as shown in  FIG. 7 , both the auxiliary supporting projections  400  and the side supporting projections  200  as shown in  FIG. 8 , or the supporting projections  100  as shown in  FIG. 9  may be arranged in the same positions. 
     This arrangement of the two supporting projections  100  may prevent a front portion of the rack  40  from trembling to the left and right by using one of the supporting projections  100  and a rear portion of the rack  40  from trembling to the left and right by using the other one of the supporting projections  100 , also making it easy to manufacture the product and saving the molding process cost because only the two supporting projections  100  are required. 
     According to the disclosure, a side supporting projection is provided in a refrigerator to support a side of a rack to prevent contact between the rack and the inner case of the refrigerator. Accordingly, noise created from collision between the side of the rack and the inside of a storeroom of the refrigerator may be reduced. 
     According to the disclosure, the rack in the refrigerator may be prevented from being out of position by preventing the rack from freely moving in a separation space between the side of the rack and the inner case. 
     Several embodiments of the disclosure have been described above, but a person of ordinary skill in the art will understand and appreciate that various modifications can be made without departing the scope of the disclosure. Thus, it will be apparent to those ordinary skilled in the art that the true scope of technical protection is only defined by the following claims.