Patent Publication Number: US-11639245-B2

Title: Packaging box for cooling

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application is a continuation of U.S. patent application Ser. No. 17/081,569, filed on Oct. 27, 2020, which claims priority to Korean Application No. 10-2020-0104947, filed Aug. 20, 2020, each of which is incorporated herein by reference in its entirety. 
    
    
     BACKGROUND 
     Technical Field 
     This disclosure relates to a packaging cooler box. 
     Description of the Related Art 
     Recently, the online business has been flourishing, thereby bringing about a huge surge in food deliveries. For food deliveries, a packaging box is used like in any other conventional deliveries. As the food for deliveries is gradually diversified, the demand for delivery increases for foods that need to be kept refrigerated for a long time. Under the circumstances, in order to deliver such chilled food, the packaging box may have an insulating member attached therein, and thereby exponentially increasing the waste of resources for packaging. Further, even if a packaging box has an insulating member attached therein, the condition of the food upon receipt is frequently deteriorated due to an incomplete cooling function. Accordingly, there is a growing need for a packaging box that can replace a disposable packaging box and has an enhanced cooling function. 
     Under the circumstances, the inventors of the present disclosure suggested Korean Patent No. 2,136,639 (hereinafter, ‘prior art reference’). Despite this prior art reference, as the delivery distance or time increased and the demand for chilled food increased, a further enhanced cooling function was increasingly required. Accordingly, the inventors of the present disclosure researched a method that can have a double cooling structure while using the cooler box of the prior art reference as is. 
     SUMMARY 
     Technical Goals 
     The present disclosure provides a packaging cooler box having a double cooling structure. The present disclosure also provides a packaging cooler box that can provide a reinforced cooling structure for the vulnerable parts in a box mode, embody an automated cleaning of all components in an unfolding mode, and has the components combined with each other in a portable mode for easy portability. The technical problems to be solved by the embodiments of the present disclosure are not limited to the above-mentioned problems, and other technical challenges can be inferred from the following embodiments. 
     Technical Solutions 
     According to an aspect to achieve the above technical challenges, there is provided a folding packaging cooler box convertible from a box mode to an unfolding mode or vice versa, comprising: a box portion having a bottom portion, sidewall portions and joint portions configured to connect with one another and to form a single plane in the unfolding mode; and a cooling reinforcing portion configured to be inserted to the inside of the box and to form a hexahedron shape together with said box portion when said box portion is converted into the box mode, wherein said cooling reinforcing portion comprises a reinforcing bottom portion configured to form a lower surface and to face the bottom portion of the said box portion upon conversion into the box mode; reinforcing sidewall portions configured to connect with the said reinforcing bottom portion and to face the sidewall portions of said box portion; and reinforcing joint portions configured to join said reinforcing sidewall portions, to be folded to face itself and to be in close contact with the reinforcing sidewall portions, upon conversion into the box mode, and wherein said reinforcing bottom portion, said reinforcing sidewall portions and reinforcing joint portions form a single plane in the unfolding mode. 
     According to another aspect, said reinforcing bottom portion, reinforcing sidewall portions and reinforcing joint portions form a single rectangular shape. 
     According to another aspect, said reinforcing joint portions each have a rounded corner. 
     According to another aspect, said reinforcing joint portions each face the inside of each joint portion of said box portion, and while said reinforcing joint portions are each folded to face itself, each folded joint portion of said box portion can be inserted to the inside of each reinforcing joint portion. 
     According to another aspect, the packaging cooler box further includes a compartment which forms a refrigerated space when provided in the inside of said cooling reinforcing portion in the box mode, and said cooling reinforcing portion comprises easy adhesive portions so that the compartment can be attached thereto, as the compartment is rolled down. 
     According to another aspect, said compartment has an easy adhesive portion at one end, and comprises a mesh portion which can hold a refrigerant. 
     According to another aspect, while the compartment is rolled down, and thereby a refrigerated space is formed inside, said mesh portion is provided at one surface of said compartment facing the refrigerated space so as to keep the refrigerated space at low temperature. 
     Details of other embodiments are included in the detailed description and drawings. 
     Effects 
     The packaging cooler box of the present disclosure can form a double cooling structure by comprising a cooling reinforcing portion in the inside of the box portion, and thereby maximizing the cooling effect in the interior space of the packaging cooler box. 
     Further, upon conversion into a box mode, the joint portions can be folded in two layers to face each other, and thereby minimizing the thermal losses in the vulnerable parts. 
     Further, since the box portion and the cooling reinforcing portion form a single plane in an unfolding mode, an introduction thereof into the cleaning device is easy, and thereby enabling a fully automated cleaning. 
     Further, since the cooling reinforcing portion can be converted into a portable mode while combined with the box portion, the user can easily grasp or carry the box with its minimized volume. 
     The effects of the invention are not limited to those described above, and other effects not mentioned here may be clearly understood by those skilled in the art from the descriptions in the claims. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG.  1    is a perspective view of an embodiment of a box portion constituting a packaging cooler box according to the present disclosure; 
         FIG.  2    is an inside view of a template for the box portion of  FIG.  1   ; 
         FIG.  3    is an outside view of a template for the box portion of  FIG.  1   ; 
         FIG.  4    is a perspective view illustrating a process of assembling the box portion constituting the packaging cooler box of the present disclosure from an unfolding mode to a box mode; 
         FIG.  5    is a cross-sectional view of an embodiment of a crease portion comprised in the packaging cooler box of the present disclosure, in an unfolding mode; 
         FIG.  6    is a cross-sectional view of an embodiment of a crease portion comprised in the packaging cooler box of the present disclosure, in a folding mode; 
         FIG.  7    is a cross-sectional view of an embodiment of a sidewall portion comprised in the packaging cooler box of the present disclosure; 
         FIG.  8    is an inside view of a template according to an embodiment of a cooling reinforcing portion constituting the packaging cooler box of the present disclosure; 
         FIG.  9    is an outside view of a template for the cooling reinforcing portion of  FIG.  8   ; 
         FIG.  10    is a perspective view illustrating a process that the cooling reinforcing portion constituting the packaging cooler box of the present disclosure is inserted into and assembled with the box portion, in an unfolding mode; 
         FIG.  11    is a perspective view illustrating an embodiment of a cooling reinforcing portion which has been completely inserted into the box portion during the packaging cooler box of the present disclosure is assembled into the box; 
         FIG.  12    is a perspective view illustrating an insertion of a compartment during the packaging cooler box of the present disclosure is assembled into the box; 
         FIG.  13    is a perspective view illustrating an embodiment of a compartment that has been completely inserted during the packaging cooler box of the present disclosure is assembled into the box; 
         FIG.  14    is a first template illustrating an embodiment of a compartment constituting the packaging cooler box of the present disclosure; 
         FIG.  15    is a second template illustrating an embodiment of a compartment constituting the packaging cooler box of the present disclosure; 
         FIG.  16    is a cross-sectional view illustrating an embodiment of a compartment that has been completely inserted in the packaging cooler box of the present disclosure; 
         FIG.  17    is a cross-sectional view illustrating another embodiment of a compartment that has been completely inserted in the packaging cooler box of the present disclosure; 
         FIG.  18    illustrates cleaning of the box portion and the cooling reinforcing portion constituting the packaging cooler box of the present disclosure, in an unfolding mode; 
         FIG.  19    is a perspective view illustrating a first step of assembling the packaging cooler box of the present disclosure from an unfolding mode to a portable mode; 
         FIG.  20    is a perspective view illustrating a second step of assembling the packaging cooler box of the present disclosure from an unfolding mode to a portable mode; and 
         FIG.  21    is a perspective view illustrating the packaging cooler box of the present disclosure that has been completely assembled into a portable mode. 
     
    
    
     DETAILED DESCRIPTION 
     The terms used in the embodiments are selected, as much as possible, from general terms that are widely used at present while taking into consideration the functions obtained in accordance with the present disclosure, but these terms may be replaced by other terms based on intentions of those skilled in the art, customs, emergence of new technologies, or the like. Also, in a particular case, terms that are arbitrarily selected by the applicant of the present disclosure may be used. In this case, the meanings of these terms may be described in corresponding description parts of the disclosure. Accordingly, it should be noted that the terms used herein should be construed based on practical meanings thereof and the whole content of this specification, rather than being simply construed based on names of the terms. 
     As used herein, the terms “module” and “portion” for the constituent elements of the present disclosure are used or interchangeably used solely for ease of preparation of the specification, and do not have different meanings and each of them does not function by itself. Further, regarding the description of the example embodiments of the present disclosure, the detailed description of the related known technologies may be omitted when such description is determined to possibly confuse the essence of the example embodiments included in the present disclosure. Further, the accompanying drawings are merely to make it easier to understand the embodiments included in the present disclosure and the technical idea of the present disclosure is not limited thereto, and they should be construed to include all of modification, equivalence and replacement involved in the idea and the technical scope of the present disclosure. 
     The terms including ordinal numbers such as ‘first’ and ‘second’ may be used to describe different constituent elements, which are not limited thereto. Said terms are used solely for distinguishing one element from another element. 
     In the entire specification, when an element is referred to as “joined with” or “connected to” another element, the two different elements may be directly joined with or connected to each other but also have another element between them. On the other hand, when an element is referred to as “directly joined with” or “directly connected to” another element, they should be understood not to have any other element between them. 
     As used herein, the singular forms are intended to include plural forms as well, unless the context clearly indicates otherwise. 
     As used herein, the term “comprising” or “having” is intended to indicate that there may be the features, numbers, steps, operations, components, parts or a combination thereof, disclosed in this disclosure, but should not be understood as excluding the case that there is one or more of other features, numbers, steps, operations, components, parts or a combination thereof, or the possibility of adding the same. 
     The expression “at least one of A, B, and C” may include the following meanings: A alone; B alone; C alone; both A and B together; both A and C together; both B and C together; and all three of A, B, and C together. 
     In the following description, embodiments of the present disclosure will be described in detail with reference to the drawings so that those skilled in the art can easily carry out the present disclosure. The present disclosure may be embodied in many different forms and is not limited to the embodiments described herein. 
     Hereinafter, example embodiments of the present disclosure will be described with reference to the drawings. 
       FIG.  1    is a perspective view of an embodiment of a box portion constituting a packaging cooler box according to the present disclosure;  FIG.  2    is an inside view of a template for the box portion;  FIG.  3    is an outside view of a template for the box portion. 
     The packaging cooler box  10  of the present disclosure consists of a box portion  100  and a cooling reinforcing portion  500 . 
     First, said box portion  100  will be explained, referring to  FIG.  1    to  FIG.  3   . The box portion  100  has a first sidewall portion  110 , a second sidewall portion  120 , a third sidewall portion  130 , and a fourth sidewall portion  140 , a bottom portion  150  which is formed to connect with the sidewall portions  110 ,  120 ,  130 ,  140  and forms a lower surface of the packaging cooler box  10  upon assembly into a box mode, and a lid portion  160  which is formed to connect with the fourth sidewall portion  140  and forms an upper surface of the packaging cooler box  10  upon assembly into a box mode. The lid portion  160  faces the bottom portion  150  upon assembly into a box mode. 
     The first sidewall portion  110  is disposed to face the third sidewall portion  130  upon assembly into a box mode, and the second sidewall portion  120  is disposed to face the fourth sidewall portion  140  that is connected with the lid portion  160  upon assembly into a box mode. Also, the second side portion  120  is disposed to be adjacent to the first sidewall portion  110  and the third sidewall portion  130  upon assembly into a box mode. The fourth sidewall portion  140  is disposed to be adjacent to the first sidewall portion  110  and the third sidewall portion  130  upon assembly into a box mode. 
     As the sidewall portions  110 ,  120 ,  130 ,  140 , the bottom portion  150 , and the lid portion  160  are configured to be connected in this way, it is easier to convert the packaging cooler box from an unfolding mode with the box unfolded into a box mode. In the box mode, a space to contain food may be provided therein. 
     The lid portion  160  may further have flaps  161 ,  162 ,  163 . The flaps  161 ,  162 ,  163  may be formed to continue along the remaining sides of the lid portion  160  except for the side connecting with the fourth sidewall portion  140 . An easy adhesive portion  300  may be provided on at least one of the flaps  161 ,  162 ,  163 . The arrangement and shape of the easy adhesive portion  300  will be described in detail below. 
     Joint portions  200  are provided between the sidewall portions  110 ,  120 ,  130 ,  140 . The joint portions  200  are provided between any two adjacent sidewall portions of the above sidewall portions. The joint portions  200  may be configured to connect with any two adjacent sidewall portions of the above sidewall portions in an unfolding mode. The joint portions  200  may be configured to connect integrally with adjacent sides constituting two adjacent sidewall portions of the above sidewall portions in the unfolding mode. 
     Specifically, a first joint portion  210  may be configured to connect integrally with adjacent sides each included in the first sidewall portion  110  and in the fourth sidewall portion  140 . A second joint portion  220  may be configured to connect integrally with adjacent sides each included in the first sidewall portion  110  and in the second sidewall portion  120 . A third joint portion  230  may be configured to connect integrally with adjacent sides each included in the third sidewall portion  130  and in the second sidewall portion  120 . And a fourth joint portion  240  may be formed to connect integrally with adjacent sides each constituting the third sidewall portion  130  and the fourth sidewall portion  140 . 
     Specific structures and functions of the joint portions  200  will be described in detail below. 
     Referring to  FIG.  2   , a crease portion  400  may be provided at the places where the bottom portion  150  meets the sidewall portions  110 ,  120 ,  130 ,  140  of the box portion  100  constituting the packaging cooler box  10  of the present disclosure. The crease portion  400 , as will be explained later, may be provided also in the cooling reinforcing portion  500  constituting the packaging cooler box  10  of the present disclosure. 
     A first crease portion  410  may be provided at the place where the bottom portion  150  meets the first sidewall portion  110  or the third sidewall portion  130 . A second crease portion  420  may be provided at the place where the bottom portion  150  meets the second sidewall portion  120  or the fourth sidewall portion  140 . The first crease portion  410  and the second crease portion  420  may be formed to connect with each other, surrounding the edge of the bottom portion  150 . 
     A third crease portion  430  may be provided at the place where the lid portion  160  and the fourth sidewall portion  140  meet. The second crease portion  420  and the third crease portion  430  may be formed in parallel at the places where the bottom portion  150  and the lid portion  160  meet the fourth sidewall portion  140 . 
     Specific structures and functions of the crease portion  400  will be described in detail below. 
     Referring to  FIGS.  2  and  3   , the box portion  100  constituting the packaging cooler box  10  of the present disclosure includes an easy adhesive portion  300 . The easy adhesive portion  300 , as will be explained later, may be provided also in the cooling reinforcing portion  500  constituting the packaging cooler box  10  of the present disclosure. 
     Here, an easy adhesive portion  300  refers to a member capable of being attached and detached repeatedly for the binding purpose. The easy adhesive portion uses a binding method by which a surface meets another surface to be attached to or detached from each other. In an embodiment, the easy adhesive portion may include Velcro. 
     Specifically, upon assembly into a box mode, easy adhesive portions  310  may attach the folded joint portions  200  to the sidewall portions. The easy adhesive portion  310  provided on the first joint portion  210  or the fourth joint portion  240  functions to be attached to and detached from the easy adhesive portion  310  provided on the fourth sidewall portion  140 . Also, the easy adhesive portion  310  provided on the second joint portion  220  or the third joint portion  230  functions to be attached to and detached from the easy adhesive portion  310  provided on the second sidewall portion  120 . 
     Also, easy adhesive portions  320  may bond the opposing faces as the joint portions  200  are folded, during assembly into a box mode. The easy adhesive portions  320  provided on the first joint portion  210  to the fourth joint portion  240  function to attach and detach the faces that become opposite to each other as each joint portion is folded. 
     Also, during assembly into a box mode, easy adhesive portions  330 ,  340  may bond the lid portion  160  to the sidewall portions. The easy adhesive portions  330  may be provided on flaps  161 ,  162 ,  163  that are connected integrally with the lid portion  160 . At the same time, the easy adhesive portions  340  may be formed on the upper part of the sidewall portions. The easy adhesive portions  340  may be provided on the upper part of the first sidewall portion  110 , the second sidewall portion  120 , and the third sidewall portion  130 , each corresponding to the easy adhesive portions  330  provided on the flaps  161 ,  162 ,  163 . 
     Also, easy adhesive portions  350 ,  360  are provided inside any one of the sidewall portions to bond a compartment  170  thereto. The easy adhesive portion  350  may be provided vertically either on the first sidewall portion  110  or on the third sidewall portion  130 , and at the same time, the easy adhesive portion  360  may be provided on both ends of the compartment  170 . 
     The compartment  170 , as will be explained later, may be also bound to the inside of the cooling reinforcing portion  500  constituting the packaging cooler box  10  of the present disclosure. In other words, the compartment  170  can be provided inside any one of the sidewall portions of said cooling reinforcing portion  500  while the cooling reinforcing portion  500  is inserted to said box portion  100 . 
     A specific transformation process and functions of the compartment  170  will be described in detail below. 
     Referring to  FIG.  3   , a handle  164 , a label  165 , and an invoice attachment  166  may be provided outside the lid portion  160 . 
     The handle  164  is located at the center of the lid portion  160  so that, when the user pulls up the packaging box  10  in a box mode, the holding capacity applies evenly and prevents the load from sliding to one side. 
     The label  165  may include a bar code label having delivery information. As such, since the label  165  is provided outside the lid portion  160 , it is possible to easily check information through a bar-code scanner, etc., during the delivery process in a box mode. 
     Also, the invoice attachment  166  may be provided so that an invoice can be inserted therein. The invoice attachment  166  is made up of a plastic pack to facilitate inserting, verifying, and removing the invoice, so that the remaining part (indicated by the dotted line in  FIG.  3   ) other than the insert may be provided to be sewn to the lid portion  160 . 
     According to an embodiment of  FIG.  3   , the label  165  may be separately provided in a different position from the invoice attachment  166 . On the contrary, the label  165  may be provided to be included in the invoice attachment  166 . 
       FIG.  4    is a perspective view illustrating a process of assembling the box portion constituting the packaging cooler box of the present disclosure from an unfolding mode to a box mode. 
     Referring to  FIG.  4   , the packaging cooler box  10  or the box portion  100  constituting it may be converted from an unfolding mode with the box unfolded (see  FIG.  2   ) to a box mode in which a space to contain food is provided (see  FIG.  1   ) or vice versa. 
     The sidewall portions  110 ,  120 ,  130 ,  140 , bottom portion  150  and lid portion  160 , which constitute a hexahedron in the box mode, are configured to be unfolded into a single plane in the unfolding mode. The adjacent sides of the sidewall portions which are located to meet, in the box mode, become apart from each other to be spaced in the unfolding mode. The joint portions  200  are formed in these spaces, and thereby the sidewall portions  110 ,  120 ,  130 ,  140  joined together from the bottom portion  150  as a center may entirely form a single rectangular shape. 
     Specifically, said first sidewall portion  110  and said fourth sidewall portion  140  each have an adjacent side: the adjacent sides of them meet in the box mode, and become apart as the packing cooler box is converted into an unfolding mode. To join the adjacent sides thus spaced together, the first joint portion  210  is formed. The said first joint portion  210  constitutes a single plane with the first sidewall portion  110  and the fourth sidewall portion  140  in the unfolding mode. In this manner, the second joint portion  220 , the third joint portion  230  and the fourth joint portion  240  can each constitute a single plane with the respective adjacent sidewall portions. 
     As a result, it is possible to provide such a shape that, when the box portion  100  is converted into an unfolding mode and then introduced into the cleaning device, enables a complete cleaning and minimization of obstacles in implementing cleaning automation. Advantages resulting from the cleaning device of the present disclosure will be further explained later. 
     On the other hand, said joint portions  200  may each have a rounded corner. For example, the first joint portion  210  is configured to be joined with the first sidewall portion  110  and the fourth sidewall portion  140 , and the remaining portion of the edge thereof may be rounded. In this manner, the second joint portion  220 , the third joint portion  230  and the fourth joint portion  240  are each configured to be joined with the respective adjacent sidewall portions, and the remaining portion of the edge thereof may be rounded. Therefore, the sidewall portions  110 ,  120 ,  130 ,  140  joined together from the bottom portion  150  as a center can integrally form a rounded single rectangular shape with the joint portions  200 . Thus, the user can easily handle the box portion  100  in the unfolding mode, and the cleaning automation can be carried out smoothly. 
     Referring to  FIG.  4   , the joint portions  200  may be configured to be folded upon conversion from an unfolding mode to a box mode. In other words, the joint portions  200  may maintain the physical connection with the adjacent sidewall portions even upon conversion into the box mode. In the box mode, the place where the adjacent sides of the sidewall portions meet is vulnerable to losses due to heat leakage or heat inflow (hereinafter, collectively referred to as ‘thermal losses’). The thermal losses can be effectively prevented by the joint portions  200  configured to be joined with the sidewall portions. 
     As such, the joint portions  200  provided in the box portion  100  of the present disclosure function so that the cleaning can be carried out smoothly through the cleaning device in the unfolding mode, and they also function, in the box mode, so that the thermal losses in the vulnerable part can be prevented to strengthen the overall cooling function. 
     Referring to  FIG.  4   , upon assembly into a box mode, a first sidewall portion  110  and a second sidewall portion  120 , which were unfolded, stand upright so that the adjacent sides of each sidewall portion become closer to each other. At this time, the second joint portion  220  joined with the adjacent sides will have a diagonal crease formed therein, along which the second joint portion  220  is overlapped on itself. The second joint portion  220  as folded so as to face itself stands completely upright to be in close contact with the inside of the first sidewall portion  110  or the second sidewall portion  120 . This transformation can also be performed in the first joint portion  210 , the third joint portion  230  and the fourth joint portion  240  in a same manner. Further, this transformation can also be performed with the first joint portion  210 , the third joint portion  230  and the fourth joint portion  240  at the same time. 
     In addition, as the packaging cooler box is converted from the unfolding mode into the box mode, easy adhesive portions  300  can be provided so that the joint portions  200  can be maintained in the folded position, and the folded joint portions  200  can remain close to the sidewall portions. In other words, the opposing two faces as the joint portions  200  are folded can be adhered to each other by the easy adhesive portions  300  as provided, and the folded joint portions  200  become in close contact with the sidewall portions and can be adhered thereto. 
     Specifically, referring to  FIG.  4   , the opposing two faces as the second joint portion  220  is folded can be adhered to each other by the easy adhesive portions  320  provided outside the second joint portion  220 . 
     In an embodiment, easy adhesive portions  323  to bond the folded second joint portion  220  can be formed in the second joint portion  220  along the sides thereof adjacent to the sidewall portions to be symmetric with each other. As such, as the easy adhesive portions  323  are formed along the sides adjacent to the sidewall portions corresponding to the above-mentioned vulnerable part, it can enhance the thermal efficiency and maintain a stable box mode. 
     In still another embodiment, easy adhesive portions  321  can be formed along the edge of the second joint portion  220  to be symmetric with each other. Since said easy adhesive portions  323  are supplemented, the second joint portion  220  can become in close contact with the sidewall portion to keep more stable attachment thereto. 
     On the other hand, referring to  FIG.  4   , the folded fourth joint portion  240  has an easy adhesive portion  310  to be attached to the fourth sidewall portion  140 . The fourth sidewall portion  140  has an easy adhesive portion  311  on the top, and the inside of the fourth joint portion  240  has an easy adhesive portion  312  corresponding thereto. In other words, the easy adhesive portion  312  is provided on the part of the inside edge of the fourth joint portion  240 , with which the fourth sidewall portion  140  is in close, upon conversion into a box mode. Since the folded joint portion is adhered to the sidewall portion by said easy adhesive portion  310  in the box mode, a space to contain food can be secured in the packing cooler box, without any hindrances. 
     The easy adhesive portions  310 ,  320  having such a configuration or shape can be provided on the four joint portions  210 ,  220 ,  230 ,  240  in a same manner. Further, this process of the adhesion while the packaging cooler box is converted into a box mode can be carried out in the four joint portions  210 ,  220 ,  230 ,  240  in a same manner. As such, the four joint portions  200  located between sidewall portions have easy adhesive portions  310 ,  320  so that they can be folded on themselves while the packaging cooler box is converted into a box mode and remain the shape, and the folded joint portions  200  can be adhered to the inside of the sidewall portions, and thereby the thermal losses due to the gap between the sidewall portions can be reduced and the shape of the box can be securely maintained. 
     As such, the box portion  100  constituting the packaging cooler box of the present disclosure can be easily converted from an unfolding mode to a box mode or vice versa, and minimize the thermal losses in the vulnerable parts essentially accompanied with the conversion. Further, a fully automated cleaning can be implemented in the unfolding mode, thereby significantly enhancing the recyclability of the packaging box. As a result, the packaging cooler box can replace a disposable packaging box, thereby reducing the waste associated with exponentially increasing demands for delivery. In particular, the recycling of a packaging box for delivery can be achieved also for the delivery foods which require a cooling function. 
       FIG.  5    is a cross-sectional view of an embodiment of a crease portion comprised in the packaging cooler box of the present disclosure, in an unfolding mode;  FIG.  6    is a cross-sectional view of an embodiment of a crease portion comprised in the packaging cooler box of the present disclosure, in a folding mode;  FIG.  7    is a cross-sectional view of an embodiment of a sidewall portion comprised in the packaging cooler box of the present disclosure. 
     The cross-sectional structure of the crease portions  400  and the sidewall portions as described below, can be applied to the box portion  100  or cooling reinforcing portion  500  constituting the packaging cooler box  10  of the present disclosure. 
     The crease portions  400  provided in the box portion  100  will be explained, referring to  FIG.  5    to  FIG.  7   . Said sidewall portions  110 ,  120 ,  130 ,  140 , bottom portion  150  and lid portion  160 , which constitute a hexahedron in the box mode, have a foam panel  11  therein. Said foam panel  11  may maintain a plate shape and be made of insulating materials for cooling, for example of expanded polypropylene (EPP). 
     An inner cover  12  and an outer cover  13  may be provided to contain said foam panel  11 . Said inner cover  12  may be made of silver or foil for insulation or cooling. Said outer cover  13  may protect the foam panel  11  located inside, prevent from being torn due to an external cause, and be made of a tarpaulin which is waterproof. 
       FIG.  7    illustrates a cross-sectional view of the upper part of the second sidewall portion  120  where easy adhesive portions  311 ,  321  are located. Referring to  FIG.  7   , said easy adhesive portions  311 ,  321 , respectively, may be attached to the faces opposite to the foam panel  11  on the inner cover  12  and on the outer cover  13 . 
     A crease portion  400  may be provided between the sidewall portions  110 ,  120 ,  130 ,  140  and the bottom portion  150 , and between the fourth sidewall portion  140  and the lid portion  160  ( FIG.  2   ). Referring to  FIG.  5    and  FIG.  6   , said crease portion  400  may comprise grooves spaced at predetermined intervals (D 1 ). The crease portion  400  having the grooves formed therein has solely the inner cover  12  and the outer cover  13  without the foam panel  11 . The crease portion  400  having the grooves formed therein may be configured to have a narrower thickness than the thickness (D 2 ) of the portion in which the foam panel  11  is contained. 
     The sidewall portions  110 ,  120 ,  130 ,  140  may easily stand upright from the bottom portion  150 , and the lid portion  160  also may be easily folded from the fourth sidewall portion  140  in the process of converting into a box mode, due to the foam panels  11  being apart from each other on the said crease portion  400 . 
     In addition, said crease portion  400  has grooves formed therein, and thereby the contaminants in the crease portion  400  may be completely eliminated when cleaning after conversion into an unfolding mode. The contamination of the bottom portion  150  is caused by a part of the food contained in the box mode but leaked therefrom. In particular, the contaminants may be hardened in the crease portions  410 ,  420  which are located along the edge of the bottom portion  150 , and would not easily be removed even in the cleaning device. Since the crease portion  400  has grooves formed therein spaced at predetermined intervals, even when the sidewall portions  110 ,  120 ,  130 ,  140  stand upright from the bottom portion  150  by the conversion into a box mode, a small gap can be secured, and thus the introduced contaminants may be easily removed through the cleaning device without hardening. 
       FIG.  8    is an inside view of a template according to an embodiment of a cooling reinforcing portion constituting the packaging cooler box of the present disclosure;  FIG.  9    is an outside view of a template for the cooling reinforcing portion;  FIG.  10    is a perspective view illustrating a process that the cooling reinforcing portion is inserted into and assembled with the box portion, in the unfolding mode;  FIG.  11    is a perspective view illustrating an embodiment of a cooling reinforcing portion which has been completely inserted into the box portion. 
     The packaging cooler box  10  of the present disclosure comprises a cooling reinforcing portion  500  which is inserted into the inside of the box portion  100 , in order to achieve the double cooling structure. 
     The cooling reinforcing portion  500  has a first reinforcing sidewall portion  511 , a second reinforcing sidewall portion  512 , a third reinforcing sidewall portion  513 , and a fourth reinforcing sidewall portion  514 , and a reinforcing bottom portion  515  which is formed to connect with the reinforcing sidewall portions  511 ,  512 ,  513 ,  514  and forms a lower surface when the cooling reinforcing portion  500  is inserted into the inside of the box portion  100  while converted to a box mode. 
     Further, when the cooling reinforcing portion  500  is inserted to the inside of the box portion  100  while converted into a box mode, said reinforcing bottom portion  515  comes into facing relationship with the bottom portion  150  of the box portion, and said four reinforcing sidewall portions  511 ,  512 ,  513 ,  514  come into facing relationship with the four sidewall portions  110 ,  120 ,  130 ,  140  of the box portion, respectively. 
     A reinforcing joint portion  520  is provided between said reinforcing sidewall portions  511 ,  512 ,  513 ,  514 . The reinforcing joint portion  520  is provided between any two adjacent reinforcing sidewall portions out of said reinforcing sidewall portions. Said reinforcing joint portion  520  can be configured to connect with any two adjacent reinforcing sidewall portions out of said reinforcing sidewall portions in an unfolding mode. Said reinforcing joint portion  520  can be configured to connect integrally with adjacent sides constituting two adjacent sidewall portions out of said reinforcing sidewall portions in an unfolding mode. 
     Specifically, a first reinforcing joint portion  521  may be configured to connect integrally with adjacent sides each included in the first reinforcing sidewall portion  511  and the fourth reinforcing sidewall portion  514 . A second reinforcing joint portion  522  may be configured to connect integrally with adjacent sides each included in the first reinforcing sidewall portion  511  and the second reinforcing sidewall portion  512 . A third reinforcing joint portion  523  may be configured to connect integrally with adjacent sides each included in the third reinforcing sidewall portion  513  and the second reinforcing sidewall portion  512 . And a fourth reinforcing joint portion  524  may be formed to connect integrally with adjacent sides each constituting the third reinforcing sidewall portion  513  and the fourth reinforcing sidewall portion  514 . 
     Said reinforcing bottom portion  515 , said reinforcing sidewall portions  511 ,  512 ,  513 ,  514  and said reinforcing joint portions  521 ,  522 ,  523 ,  524  form a single plane in an unfolding mode. As a result, an introduction thereof into the cleaning device, advantageously, becomes easier, and thereby achieving the cleaning automation of said cooling reinforcing portion  500  through the same device for cleaning the box portion  100 . 
     The reinforcing joint portions  520  are formed, and thereby the reinforcing sidewall portions  511 ,  512 ,  513 ,  514  joined together from the reinforcing bottom portion  515  as a center may form a single rectangular shape. It is possible to provide such a shape that, when the packaging cooler box  10  is converted into an unfolding mode and then introduced into the cleaning device, enables a complete cleaning and minimization of obstacles in implementing cleaning automation. 
     Said reinforcing joint portions  520  may each have a rounded corner. With the reinforcing joint portions  520  having rounded corners, the reinforcing sidewall portions  511 ,  512 ,  513 ,  514  joined together from the reinforcing bottom portion  515  as a center can form a rounded single rectangular shape. Thus, the user can easily handle the cooling reinforcing portion  500  in the unfolding mode, and the cleaning automation can be carried out smoothly. The cleaning automation will be described more below. 
     While said cooling reinforcing portion  500  is converted from the unfolding mode into the box mode, said reinforcing joint portion  200  can be folded to face itself. At the same time, said reinforcing joint portion  520  is configured to be in contact with adjacent reinforcing sidewall portion. If the cooling reinforcing portion  500  is inserted to the inside of the box portion  100  and converted into a box mode, as said reinforcing joint portion  520  comes into facing the inside of the joint portion  200  of the box portion, and said reinforcing joint portion  520  is about to be folded to face itself, the folded joint portion  200  of the box portion can be inserted therein. Accordingly, the thermal losses in the vulnerable parts can be minimized by the joint portions folded in two layers. 
     As such, the cooling reinforcing portion  500  can be converted from an unfolding mode into a box mode together with the box portion  100  as explained earlier. In other words, said cooling reinforcing portion  500  can be inserted to the inside of said box portion in the unfolding mode for cleaning, etc., and can be converted into the box mode for forming a double cooling structure, or vice versa. 
     The cooling reinforcing portion  500  may comprise an easy adhesive portion. Referring to  FIG.  8    and  FIG.  9   , the easy adhesive portion can be provided on the inside or outside of the cooling reinforcing portion  500 . 
     Specifically, the first reinforcing sidewall portion  511  or the third reinforcing sidewall portion  513  which constitutes the inside of the cooling reinforcing portion  500  may comprise the easy adhesive portion  531  which is provided vertically in a box mode. Further, the reinforcing bottom portion  515  may also comprise an easy adhesive portion  532 . A plurality of said easy adhesive portions  532  can be formed at predetermined intervals, and thereby where to fix one end of the compartment  170  can be freely decided. The embodiments depending on where to fix the compartment  170  will be described in detail later. 
     Further, an easy adhesive portion  533  can be provided at both ends of the cooling reinforcing portion  500 . Said easy adhesive portion  533  can be attached to the easy adhesive portion of the box portion  100  in order to be converted to a portable mode. The process how the cooling reinforcing portion  500  is attached in the portable mode will be described in detail later. 
     As such, the cooling reinforcing portion  500  can be inserted to the inside of the box portion  100 , and then embody the double cooling structure easily and effectively. By inserting the cooling reinforcing portion  500 , the cooling effect of the interior space of the packaging cooler box can be maximized as compared to a single layered packaging cooler box. The double cooling structure could be also achieved effectively by utilizing the prior art reference suggested by inventors of the present disclosure. 
       FIG.  12    is a perspective view illustrating an insertion of a compartment during the packaging cooler box of the present disclosure is assembled into the box;  FIG.  13    is a perspective view illustrating an embodiment of a compartment which has been completely inserted;  FIG.  14    is a first template illustrating an embodiment of a compartment constituting the packaging cooler box of the present disclosure;  FIG.  15    is a second template illustrating an embodiment of a compartment;  FIG.  16    is a cross-sectional view illustrating an embodiment of a compartment which has been completely inserted in the packaging cooler box of the present disclosure; and  FIG.  17    is a cross-sectional view illustrating another embodiment of a compartment which has been completely inserted. 
     Referring to the above drawings, the packaging cooler box  10  may comprise the compartment  170  to separate the internal space in the box mode into a refrigerated space S 1  and a room temperature space S 2 . 
     Referring to  FIG.  14    and  FIG.  15   , said compartment  170  may consist of a single plane in the unfolded condition. Said compartment  170  may have a rectangular shape, but may be formed to have rounded corners for easy handling by the user. 
     Said compartment  170  may comprise a mesh portion  180 . The mesh portion  180  forms a refrigerant-holding portion S 3  which can hold a refrigerant. For example, the refrigerant may be filled in an ice pack. By providing said mesh portion, etc., said compartment  170  can hold the refrigerant at a fixed position, and the refrigerant can be fixed on one surface of said compartment  170  facing the refrigerated space S 1 . Specifically, said mesh portion  180  can be provided on one surface of said compartment facing the refrigerated space S 1  so that said refrigerated space S 1  can be maintained at a low temperature condition, in the case that said compartment  170  forms the refrigerated space S 1  inside as it is rolled down ( FIG.  16    and  FIG.  17   ). 
     Said compartment  170  may have easy adhesive portions  361 ,  362  at both ends. Said compartment  170  may be rolled along the longitudinal direction (the transverse direction of  FIG.  14   ). The said compartment  170  may be configured such that the easy adhesive portions  361 ,  362  provided at both ends thereof can contact one surface as it is rolled down. As a result, a separate space is formed inside the rolled compartment  170 , and the cooling power is strengthened by a dual insulation wall in the space. Therefore, an environment is provided in which this space can function as the refrigerated space S 1 . In other words, said refrigerated space S 1  has a dual insulation wall resulting from the compartment  170  and the hexahedron of the packaging box  10 , thereby preventing thermal losses such that the chilled food can be stored for a long time. At the same time, by providing said mesh portion  180 , the refrigerant can be fixed on the position facing said refrigerated space S 1 , and thereby stably maintaining the low temperature condition. 
     On the other hand, the space that is outside the compartment  170  but inside the hexahedron of the packaging box  10  may function as the room temperature space S 2  suitable for a long-term storage of the room temperature food. By the compartment  170  provided therein, the packaging box  10  may have inside a space to store the chilled food and a space to store the room-temperature food for a long time at the optimal conditions, at the same time. 
     In an embodiment of the attachment of the compartment  170 , referring to  FIG.  16   , said compartment  170  can be rolled down such that the easy adhesive portion  361  provided at one end thereof and the easy adhesive portion  362  provided at the other end can be attached to the easy adhesive portion  531  provided in the inside of the cooling reinforcing portion  500  at the same time. In an embodiment, the easy adhesive portion can be provided at one end of the front of the compartment  170  (the first template of  FIG.  15   ) and, at the same time, at the other end of the back (the second template of  FIG.  16   ). Both easy adhesive portions can each be attached to the upper end or the lower end of the easy adhesive portion  531  comprised in the reinforcing sidewall portion of the cooling reinforcing portion  500 . 
     In still another embodiment, referring to  FIG.  17   , both easy adhesive portions of said compartment  170  can each be attached to the easy adhesive portion  532  comprised in the reinforcing bottom portion of the cooling reinforcing portion  500  or the easy adhesive portion  531  comprised in the reinforcing sidewall portion. 
     As such, the reinforcing bottom portion also comprises the easy adhesive portion  532  over the entire width, and thereby where to fix one end of the compartment  170  can be decided freely, and thereby securing the refrigerated space S 1  having the size or shape as the user desires. In other words, the refrigerated space S 1  can be comparted freely in consideration of the shape and size of the chilled food to be contained. 
     Further, referring to  FIG.  12    and  FIG.  13   , during the user separates the food into the chilled food and the room-temperature food and stores them in the packaging box  10 , he/she can put the chilled food first while attaching one end of the compartment  170  to the lower end of the easy adhesive portion  350 , and then attach the other end of the compartment  170  to the upper end of the easy adhesive portion  350 . Once the compartment  170  is completely attached, the user may put the room-temperature food in the remaining space separated by the compartment  170  to complete the storage of the contents, and right away put the lid portion  160  on, thereby rendering the condition ready to deliver. As such, the easy adhesive portions  360  provided at both ends of the compartment  170  can separate the space through a prompt, easy process and contain the food suitable for each corresponding space at the optimal conditions. 
       FIG.  18    illustrates cleaning of the box portion and the cooling reinforcing portion constituting the packaging cooler box of the present disclosure, in an unfolding mode. 
     Referring to  FIG.  18   , the box portion  100  and the cooling reinforcing portion  500  are configured such that they can be unfolded into a single plane in the unfolding mode, and the unfolded box portion  100  and the cooling reinforcing portion  500  may be introduced into the cleaning device M to implement an automated cleaning. 
     The cleaning device M is configured such that the inside and outside surfaces of the unfolded part may be automatically cleaned as the box portion  100  and the cooling reinforcing portion  500  in the unfolding mode pass through the cleaning device M at a particular direction (direction of the arrow in  FIG.  18   ). At this time, the cleaning process may become easy and complete when the box portion  100  and the cooling reinforcing portion  500  are a single plane and has a simple shape such as a rectangle. In the case of a single plane with a complex shape such as a cross or a shape having protrusions, the obstacles increase in implementing an automated cleaning, such as jamming during the cleaning process. 
     In other words, if the joint portions  200  and the reinforcing joint portions  520  are not provided, and thus the adjacent sides of the sidewall portions are formed to be apart from each other in the unfolding mode of the box portion  100  and the cooling reinforcing portion  500 , the first sidewall portion  110  and the reinforcing sidewall portion  510  would work as protrusions during they are introduced into the cleaning device M, and deteriorate the cleaning process. 
     As such, the box portion  100  and the cooling reinforcing portion  500  according to the present disclosure have the joint portions and reinforcing joint portions joining the adjacent sidewall portions and reinforcing sidewall portions, respectively, to simplify the shape in the unfolding mode into a rectangle, thereby achieving a perfect cleaning optimized to the cleaning device M. 
       FIG.  19    is a perspective view illustrating a first step of assembling the packaging cooler box of the present disclosure from an unfolding mode to a portable mode;  FIG.  20    shows a second step; and  FIG.  21    is a perspective view illustrating the packaging cooler box which has been completely assembled into a portable mode. 
     The packaging cooler box  10  according to the present disclosure can be converted into the portable mode. The packaging cooler box  10  in such a portable mode may be utilized, for example, when the delivery is completed, the content therein is removed from the packaging box, and then the volume and size thereof may be minimized to be delivered back to the shipping company. 
     Now, the process of converting from the unfolding mode to the portable mode with respect to the box portion  100  and the cooling reinforcing portion  500  constituting said packaging cooler box  10  will be explained. 
     In the first step, referring to  FIG.  19   , the cooling reinforcing portion  500  can be combined with the box portion  100 . In other words, based on the outside of said cooling reinforcing portion  500  ( FIG.  9   ), the easy adhesive portions  533  formed on the upper end and lower end can be attached to one of the easy adhesive portions  311   b  formed on the upper end portions of the second sidewall portion  120  to the fourth sidewall portion  140  of said box portion  100 . 
     Said easy adhesive portion  311   b  can be provided over the entire width of the second sidewall portion  120  or the fourth sidewall portion  140  from side to side. That is, the easy adhesive portion  311  provided on the said second sidewall portion  120  or the fourth sidewall portion  140  can be configured to be extended to the middle part of the second sidewall portion  120  or the fourth sidewall portion  140  beyond the part corresponding to the joint portion which can be attached to or separated from itself, or configured to be connected at the middle part. 
     According to the attachment structure of the compartment  170  as will be explained later, said compartment  170  can be attached to the easy adhesive portion  311   b  of the second sidewall portion  120 , and preferably, the said cooling reinforcing portion  500  can be attached to the easy adhesive portion  311   b  of the fourth sidewall portion  140 . 
     According to the above embodiment, the easy adhesive portion  533  which is provided at one end of the cooling reinforcing portion  500  during conversion into the portable mode can be attached to the easy adhesive portion  311   b  of the fourth sidewall portion  140 . Although the joint portions are folded inward, a part of the easy adhesive portion  311   b  may be exposed in the extended middle part, and the cooling reinforcing portion  500  may be fixed to the exposed part of the easy adhesive portion  311 , and can be contained securely without falling out in the portable mode. 
     In the second step, referring to  FIG.  20   , fold the first sidewall portion  110  and the third sidewall portion  130  along with the adjacent first joint portion  210  to the fourth joint portion  240  inward, while the cooling reinforcing portion  500  is attached to the box portion  100 . Next, put the detached compartment  170  in the place that the first sidewall portion  110 , the third sidewall portion  130 , etc. are folded inward. At this time, the one end of the compartment  170  may be attached to the second sidewall portion  120 . Then, fold the second sidewall portion  120  inward. Then, folding the lid portion  160  inward, attach an easy adhesive portion  333  provided on the flap  163  to an adhesive portion  343  provided outside the second sidewall portion  120 . 
     Referring to  FIG.  21   , the upper part of the packaging box  10  which is completely converted into the portable mode still has the handle  164  located in and exposed from the center of the lid portion  160 , and thus the user can easily grasp the handle  164  to move the packaging box  10 . 
     On the other hand, the function of fixation of the compartment  170  in the portable mode will be explained in detail as follows: the easy adhesive portion  311   b  can be provided on the fourth sidewall portion  140  over the entire width thereof from side to side. That is, the easy adhesive portion  311  provided on the said second sidewall portion  120  can be configured to be extended to the middle part of the fourth sidewall portion  140  beyond the part corresponding to the easy adhesive portions  312  provided on the joint portion which can be attached to or separated from itself, or configured to be connected at the middle part. 
     As a result, it can be attached to the easy adhesive portion  361  provided at one end of the compartment  170  during the mode is converted into the portable mode. Although the joint portions are folded inward, a part of the easy adhesive portion  311  may be exposed in the extended middle part, and the compartment  170  may be fixed to the exposed part of the easy adhesive portion  311 , and can be contained securely without falling out in the portable mode. 
     Said compartment  170  can be attached to an easy adhesive portion  331   b  provided on the upper end of the second sidewall portion  120 , and said cooling reinforcing portion  500  is attached to an easy adhesive portion  331   b  provided on the upper end of the fourth sidewall portion  140 , and thereby the compartment  170  and the cooling reinforcing portion  500  can be converted into the portable mode while they are stably combined with the box portion  100 . As a result, the user can easily grasp or carry the packaging cooler box  10  consisting of the cooling reinforcing portion  500 , the box portion  100 , etc. with its minimized volume. 
     The above-described embodiments are merely examples and other embodiments may be implemented within the scope of the following claims. 
     DESCRIPTION OF THE REFERENCE NUMERALS 
       10 : packaging cooler box 
       100 : box portion 
       170 : compartment 
       180 : mesh portion 
       200 : joint portion 
       300 : easy adhesive portion 
       400 : crease portion 
       500 : cooling reinforcing portion 
       511 ,  512 ,  513 ,  514 : reinforcing sidewall portions 
       515 : reinforcing bottom portion 
       521 ,  522 ,  523 ,  524 : reinforcing joint portions 
       531 ,  532 ,  533 : easy adhesive portion 
     S 1 : refrigerated space 
     S 2 : room temperature space 
     S 3 : refrigerant insertion 
     M: cleaning device