Abstract
A swing door system for use with a freezer device is provided. The system includes two adjacent swing doors and a mullion in contact with the swing doors. Each swing door has a transparent pane and a non-transparent area. The non-transparent area is proximal to the mullion when the swing doors are in a closed position. The non-transparent areas and the mullion define a non-transparent region. The system has, under a horizontal viewing angle between 0 and 180 with respect to the plane in which the swing doors are arranged when the swing doors are in the closed position, all of the horizontal diameters of the non-transparent region are less than 100 mm.
Claims
1. A swing door system for use with a freezer device, comprising: two adjacent swing doors each having a transparent pane and a non-transparent area; and a mullion in contact with the two adjacent swing doors, wherein each non-transparent area is proximal to the mullion when the adjacent swing doors are in a closed position, wherein the non-transparent areas and the mullion define a non-transparent region, wherein under a horizontal viewing angle between 0 and 180 with respect to the plane in which the two adjacent swing doors are arranged when the two adjacent swing doors are in the closed position all horizontal diameters of the non-transparent region are less than 100 mm.
2. The swing door system of claim 1, wherein at least one of the horizontal diameters is less than 80 mm.
3. The swing door system of claim 1, further comprising a ratio between a largest horizontal diameter and a smallest horizontal diameter that is less than 2.
4. The swing door system of claim 1, wherein the non-transparent region has a width that is less than 70 mm.
5. The swing door system of claim 1, wherein the non-transparent region has a depth that is less than 70 mm.
6. The swing door system of claim 1, wherein the mullion has a cross-section that is selected from a group consisting of T-shaped, Y-shaped, and triangle-shaped.
7. The swing door system of claim 1, wherein the mullion is integrally formed, at least in a region that extends from a bottom to a top of the two adjacent swing doors.
8. The swing door system of claim 1, wherein the mullion comprises two elements that are coupled to each other form-fit and/or force-fit and/or that are firmly bonded to each other, at least in a region that extends from a bottom to a top of the two adjacent swing doors.
9. The swing door system of claim 1, wherein the mullion comprises a cavity or is solid.
10. The swing door system of claim 1, wherein the mullion has a part that reaches in between the two adjacent swing doors when the swing doors are in the closed position.
11. The swing door system of claim 1, further comprising an insulation profile attached to the mullion.
12. The swing door system of claim 11, wherein the insulation profile is attached to the mullion selected from a group consisting of a form-fit, a force-fit, a bond, and any combinations thereof.
13. The swing door system of claim 11, wherein the insulation profile is made of a material selected from a group consisting of a plastic, a polymer, a polyvinyl chloride, and metal.
14. The swing door system of claim 11, wherein the insulation profile comprises a space filled with a thermally insulating material selected from a group consisting of foam, polyurethane (PUR) foam, gas-fill, and a vacuum.
15. The swing door system of claim 1, wherein the mullion comprises at least one two sealing surface each inclined with respect to the plane in which the two adjacent swing doors are arranged when the two adjacent swing doors are in the closed position.
16. The swing door system of claim 11, further comprising a gasket attached to a location selected from a group consisting of the mullion, the insulation profile, at least one of the two adjacent swing doors, and any combinations thereof.
17. The swing door system of claim 16, wherein the gasket and the insulation profile form a barrier between the mullion and an interior of a freezer when the two adjacent swing doors are in the closed position.
18. The swing door system of claim 1, further comprising a magnetic connection that magnetically connects the two adjacent swing doors to the mullion when the two adjacent swing doors are in the closed position.
19. The swing door system of claim 1, further comprising a non-transparent ink in the non-transparent region.
20. The swing door system of claim 1, wherein the mullion is made of a material selected from a group consisting of metal, aluminum, steel, plastic, fiber reinforced plastic, plastic coated metal, plastic coated aluminum, and plastic coated steel.
21. The swing door system of claim 1, wherein each swing door is at least partly surrounded by a solid profile with an L-shaped cross-section.
22. The swing door system of claim 21, further comprising a gasket arranged to form a barrier between the solid profile and an interior of a freezer when the two adjacent swing doors are in the closed position.
23. The swing door system of claim 1, wherein at least one of the two adjacent swing doors has a rotating axis having a position selected from a group consisting of the non-transparent region, off-center with respect to a depth of the non-transparent region, an area between the two adjacent swing doors, and any combinations thereof.
24. The swing door system of claim 1, wherein at least one of the two adjacent swing doors comprises a hinge at opposite ends.
25. A freezer device, comprising a cabinet and the swing door system of claim 1 arranged in the cabinet such that the opening direction of the swing door system is horizontal.
Description
DESCRIPTION OF THE DRAWINGS
[0053] FIG. 1 shows a perspective view of a part of the adjacent swing doors of a swing door system according to an embodiment of the present invention;
[0054] FIG. 2 shows a horizontal cross-sectional view of the swing doors system according to FIG. 1;
[0055] FIG. 3 shows a horizontal cross-sectional view of a swing door system according to a further embodiment of the present invention;
[0056] FIG. 4 shows a front view of the swing door system according to FIG. 3 mounted to a mounting frame;
[0057] FIG. 5 shows a horizontal cross-sectional view of a swing door system according to a further embodiment of the present invention;
[0058] FIG. 6 shows a front view of the swing door system according to FIG. 5 mounted to a mounting frame;
[0059] FIG. 7 shows a horizontal cross-sectional view of a mullion according to a further embodiment of the present invention;
[0060] FIG. 8 shows a horizontal cross-sectional view of a mullion according to a further embodiment of the present invention;
[0061] FIG. 9 shows a perspective view of a freezer device according to an embodiment of the present invention;
[0062] FIG. 10 shows a horizontal cross-sectional view of a swing door system according to a further embodiment of the present invention.
DETAILED DESCRIPTION
[0063] FIGS. 1 and 2 show different views of a part of the adjacent swing doors 1a, 1b of a swing door system 2 according to an embodiment of the present invention.
[0064] Each of the adjacent swing doors 1a, 1b comprising transparent panes 3a, 3b. The transparent panes 3a, 3b are spaced apart from each other by spacers 4a, 4b. The swing door system 2 further comprises a mullion 5 that has a T-shaped cross-section, wherein a part 6 of the mullion 5 reaches in between the adjacent swing doors 1a, 1b, when the swing doors 1a, 1b are in the closed position. It should be noted that the part 6 can be shorter such that it does not reach in between the adjacent swing doors 1a, 1b.
[0065] FIG. 1 further shows that the mullion 5 comprises two sealing surfaces 7a, 7b each comprising a gasket 8a, 8b. Each of the swing doors 1a, 1b comprises a profile 14a, 14b, a layer 15a, 15b and a print 16a, 16b that form a non-transparent area on each swing door 1a, 1b. The non-transparent areas of the swing doors 1a, 1b are each proximal to the mullion 5 when the swing doors 1a, 1b are in the closed position. The non-transparent areas and the mullion 5 together define a non-transparent region 9 that is marked in FIGS. 1 and 2 with a dashed square. Depending on the horizontal viewing angle, the horizontal diameter 10 of the non-transparent region 9 can be different. FIG. 2 shows that the depth 11 of the non-transparent region 9 is defined as the horizontal diameter 10 of the non-transparent region 9 being viewed under an horizontal viewing angle of 0 or 180 with respect to the plane in which the swing doors 1a, 1b are arranged when the swing doors 1a, 1b are in a closed position, i.e. the right or left side of the dashed square. The width 12 of the non-transparent region 9 is defined as the horizontal diameter 10 of the non-transparent region 9 being viewed under an horizontal viewing angle of 90 with respect to the plane in which the swing doors 1a, 1b being arranged when the swing doors 1a, 1b are in a closed position. Hence, the width 12 corresponds to the front side of the dashed square.
[0066] Due to the design of the mullion 5, the depth 11 and the width 12 of the non-transparent region 9 are extremely short and correspond at least essentially to the depth 30 and width 31 of the mullion 5. Because of the low depth 11 of the non-transparent region 9, the visibility inside of the freezer device is improved when the customer is viewing slantwise into the freezer. The low width 12 of the non-transparent region 9 improves the visibility during the selection phase, i.e. when a person is standing in front of the closed swing doors 1a, 1b.
[0067] Furthermore, FIGS. 1 and 2 show that each of the gaskets 8a, 8b comprise a magnet 13a, 13b. Each magnet 13a, 13b is positioned near the part 6 of the mullion 5. A solid L-shaped profile 14a, 14b protects each of the adjacent swing doors 1a, 1b. It should be noted that the L-shaped profile 14a, 14b forms a part of the non-transparent region 9 since it blocks a person's view of the products. In the closed position of the swing doors 1a, 1b the legs of each L-shaped profile 14a, 14b are parallel to the sealing surface 7a, 7b and the part 6 of the mullion 5. Moreover, the L-shaped profile 14a, 14b comprises a layer 15a, 15b of a material, preferably of metal, for example of steel, that interacts with the magnets 13a, 13b when the swing doors 1a, 1b are in the closed position. Thereby the swing doors 1a, 1b are held securely in the closed position such that the sealing of the inside of the freezer device is improved and the swing doors 1a, 1b can still be opened easily. Instead of providing a layer 15a, 15b the L-shaped profile 14a, 14b itself can be made of such a material that interacts with the magnets 13a, 13b.
[0068] Each of the adjacent swing doors 1a, 1b may comprise a print 16a, 16b with a non-transparent ink in the non-transparent region 10 as indicated only in FIG. 2.
[0069] According to FIG. 2, the rotating axis 17 of the left swing door 1b is positioned in the non-transparent region 9 with a distance 18 of 5 mm away from the external surface of the L-shaped profile 14a, 14b. With respect to the thickness 19 of the swing door 1a, the rotating axis 17 is off-centered, i.e. is positioned in alignment with the external transparent pane 3a. The depth 11 of the non-transparent region 9 is here 42 mm, wherein the width 12 of the non-transparent region 9 is 45 mm. Further, the thickness 19 of each swing door 1a, 1b without the L-shaped profile 14a, 14b is 26 mm. The gap 20 between the swing doors 1a, 1b in the closed position is 5 mm. If a customer looks under a horizontal view angle of 45 horizontally towards the non-transparent region 9 the horizontal diameter 10 of the non-transparent region 9 is 55 mm, i.e. the length defined by the left end of the print 15a and the right end of the sealing surface 7b.
[0070] FIGS. 3 and 4 show another embodiment of a swing door system 2. The swing door system 2 comprises two adjacent swing doors 1a, 1b, wherein each swing door 1a, 1b includes transparent panes 3a, 3b being spaced from each other by spacers 4a, 4b. Furthermore, a mullion 5 is arranged. The mullion 5 is T-shaped and comprises a part 6 that reaches between the adjacent swing doors 1a, 1b, when the swing doors 1a, 1b are in the closed position. It is possible that the part 6 is shorter, such that it does not reach in between the adjacent swing doors 1a, 1b. The depth 30 of the mullion 5 is shorter than the depth 11 of the non-transparent region 9. The width 31 of the mullion 5 equals the width 12 of the non-transparent region 9. The mullion further comprises sealing surfaces 7a, 7b onto which the gaskets 8a, 8b are fixed, for example glued or snapped into. The adjacent swing doors include wedges 23a, 23b that are made of a material that interacts with the magnets 13a, 13b of the gaskets. For example, the wedges 23a, 23b are made of steel. The sealing surfaces 7a, 7b of the mullion 5 are inclined with respect to the transparent panes 3a, 3b when the adjacent swing doors 1a, 1b are in the closed position. Hence, shear forces are minimized that are acting on the gaskets 8a, 8b when the swing doors 1a, 1b are opened, i.e. when the magnets 13a 13b are disconnected from the wedges 23a, 23b. Furthermore, due to the design of the mullion 5 the horizontal diameter 10 of the non-transparent region 9 is minimized, especially the depth 11 and the width 12. Furthermore the design of the mullion 5 avoids shear forces acting on the gasket during the intial phase when opening the swing doors are minimized.
[0071] FIG. 4 further shows that the left swing door 1 comprises a hinge element 21, such that the swing door 1a can be rotatable mounted to horizontal profile 22 of an outer frame. The right swing door 1b can comprise a hinge on its not shown right side.
[0072] FIGS. 5 and 6 show another embodiment of a swing door system 2. The swing door system 2 comprises two adjacent swing doors 1a, 1b, wherein each swing door 1a, 1b includes transparent panes 3a, 3b being spaced from each other by spacers 4a, 4b. Furthermore, a mullion 5 is arranged. The mullion 5 is T-shaped and comprises a part 6 that reaches between the adjacent swing doors 1a, 1b, when the swing doors 1a, 1b are in the closed position. The depth 30 of the mullion 5 is shorter than the depth 11 of the non-transparent region 9. The width 31 of the mullion 5 equals the width 12 of the non-transparent region 9. Hence, the swing door system 2 according to FIGS. 5 and 6 corresponds to the embodiment shown in FIGS. 1 and 2. In contrast to the embodiment of FIGS. 1 and 2 the rotating axis of the left door 1a is arranged between the adjacent swing doors 1a, 1b. Hence, shear forces are minimized that are acting on the gaskets 8a, 8b when the swing doors 1a, 1b are opened and the right door 1b is prevented from blocking the left door 1a, when the left door 1 is opened.
[0073] FIG. 6 further shows that the left swing door 1 comprises a hinge 21, such that the swing door 1a can be rotatable mounted to a horizontal profile 22 of an outer frame. The right swing door lb can comprise a hinge on its not shown right side
[0074] FIG. 7 shows a cross-sectional view parallel to the opening direction of a mullion 5 according to a further embodiment of the present invention. The mullion 5 has a triangle shaped cross section. Therefore, the sealing surfaces 7a, 7b of the mullion 5 are inclined with respect to the not shown transparent pane of the adjacent swing doors when the swing doors are in the closed position. A triangle shaped mullion 5 has the advantage that the inner part 24 of the mullion 5 can serve as a cable duct, heat pipes, heating elements or other elements.
[0075] FIG. 8 shows a cross-sectional view parallel to the opening direction of a mullion 5 according to a further embodiment of the present invention. The mullion 5 has a Y-shaped cross section. Therefore, the sealing surfaces 7a, 7b of the mullion 5 are inclined with respect to the not shown pane of the adjacent swing doors when the swing doors are in the closed position. The part 6 of the Y-shaped mullion 5 can reach in between the not shown adjacent swing doors. Furthermore, part 6 can be realized shorter, such that it does not reach in between the adjacent swing doors.
[0076] FIG. 9 shows a perspective view of a freezer device 25 according to an embodiment of the present invention. The freezer device 25 comprises a cabinet 26 and three swing door systems 2 each including two adjacent swing doors 1a, 1b and a mullion 5. The customer can see the products 27 through the transparent panes 3a, 3b of the swing doors 1a, 1b. Due to the low depth 11 and low width 12 of the non-transparent region 9, the person's view of the products 27 is improved when the person is viewing slantwise into the freezer device 2. Furthermore, the low width 12 of the non-transparent region 9 improves the view on the products 27, when the person stands in front of the freezer device 2.
[0077] Further, the freezer device 2 comprises an energy source 28 that is connected with an interface 29, which enables to provide energy to a heating element and/or light elements inside the swing doors 1a, 1b.
[0078] FIG. 10 shows another embodiment of a swing door system 2. The swing door system 2 comprises two adjacent swing doors 1a, 1b, wherein each swing door 1a, 1b includes transparent panes 3a, 3b being spaced from each other by spacers 4a, 4b. Furthermore, a mullion 5 is arranged. The mullion 5 is essentially triangle shaped and comprises a part 6 that reaches between the adjacent swing doors 1a, 1b, when the swing doors 1a, 1b are in the closed position. It is possible that the part 6 is shorter, such that it does not reach in between the adjacent swing doors 1a, 1b but at least points in this direction. Further, an insulation profile 33 is attached to the mullion 5. The insulation profile 33 comprises a space 38 that is filled with a thermally insulating material 34. In this embodiment, the space 38 is defined by a cavity, such that the insulation profile 33 is a hollow profile. The insulation profile 33 is firmly bonded to the mullion 5 with bonding material 39, for example with an adhesive tape. The insulation profile 33 can be attached at different fixation points or over its whole length to the mullion 5. Additionally, the insulation profile 33 comprises protuberances 35 that fit into recesses 36 of the mullion 5 for providing a force-fit and/or form-fit connection.
[0079] The mullion 5 further comprises a passage 37 for mounting the mullion 5 to the horizontal profiles, for example with screws.
[0080] Each of the swing doors 1a, 1b comprises an L-shaped profile 14a, 14b. Moreover, gaskets 8a, 8b are attached to the mullion 5 and the insulation profile 33. When the swing doors 1a, 1b are in the closed position the gaskets 8a, 8b form a barrier between the mullion 5 and the interior of the freezer. Additionally, the gaskets 8a, 8b are arranged such as to form a barrier between the L-shaped profiles 14a, 14b and the interior of the freezer when the swing doors 1a, 1b are in the closed position. By providing these two barriers, a very good thermal insulation is achieved such that a heating of the swing doors 1a, 1b is not necessary.
[0081] Further, each of the gaskets 8a, 8b comprises a magnet 13a, 13b. Moreover, the L-shaped profile 14a, 14b comprises a layer 15a, 15b of a material, preferably of metal, for example of steel, that interacts with the magnets 13a, 13b when the swing doors 1a, 1b are in the closed position. Thereby the swing doors 1a, 1b are held securely in the closed position such that the sealing of the inside of the freezer device is improved and the swing doors 1a, 1b can still be opened easily. Instead of providing a layer 15a, 15b the L-shaped profile 14a, 14b itself can be made of such a material that interacts with the magnets 13a, 13b.
[0082] Many modifications and other embodiments of the invention set forth herein will come to mind to the one skilled in the art to which the invention pertains having the benefit of the teachings presented in the foregoing description and the associated drawings. Therefore, it is to be understood that the invention is not to be limited to the specific embodiments disclosed and that modifications and other embodiments are intended to be included within the scope of the appended claims. Although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.
TABLE-US-00001 LIST OF REFERENCE SIGNS 1a, 1b swing door 2 swing door system 3a, 3b transparent pane 4a, 4b spacer 5 mullion 6 part 7a, 7b sealing surface 8a, 8b gasket 9 non-transparent region .sup.10, 10 horizontal diameter 11 depth 12 width 13a, 13b magnet 14a, 14b profile 15a, 15b layer 16a, 16b print 17 rotating axis 18 distance 19 thickness 20 gap 21 hinge 22 horizontal profile 23a, 23b wedge 24 inner part (mullion) 25 freezer device 26 cabinet 27 product 28 energy source 29 interface 30 depth 31 width 32 vertical side 33 insulation profile 34 thermally insulation material 35 protuberance 36 recess 37 passage 38 space 39 bonding material
