Refrigerator

Abstract

A refrigerator, comprising: a refrigerator body (2); an inner door (3), arranged on the refrigerator body (2) to be capable of being opened and closed; an outer door (4), arranged on the inner door (3) to be capable of being opened and closed; a connecting member, arranged on the inner door (3), the connecting member being provided with a shaft hole; and a refrigerator body hinge (6) and a door body hinge (7). One end of the refrigerator body hinge (6) is connected to the refrigerator body (2); one end of the door body hinge (7) is connected to the outer door (4); the other end of the refrigerator body hinge (6) and the other end of the door body hinge (7) are both arranged in the shaft hole and can rotate relative to the shaft hole, and the other end of the refrigerator body hinge (6) can rotate relative to the other end of the door body hinge (7); or, one of the other end of the refrigerator body hinge (6) and the other end of the door body hinge (7) is arranged in the shaft hole and can rotate relative to the shaft hole, and the other of the other end of the refrigerator body hinge (6) and the other end of the door body hinge (7) is sleeved on the outer side of the connecting member and can rotate relative to the connecting member. The inner door (3) and the outer door (4) can move individually, and the structure is simple.

Description

refrigerator

[0001] This application is based on the Chinese patent application with application number 202311373338.7 and application date October 23, 2023, and claims the priority of the Chinese patent application. The entire content of the Chinese patent application is hereby introduced into this application as a reference. Technical Field

[0002] The present application relates to the technical field of refrigeration equipment, and in particular to a refrigerator. Background Art

[0003] To meet the needs of reducing cold air leakage and lowering energy consumption, refrigerators with two doors are now available on the market. These doors feature a cabinet connected to an inner door, and an outer door connected to the inner door. This type of refrigerator requires a design that allows for independent movement of the cabinet and door hinges.

[0004] During the implementation of the embodiments of the present disclosure, it was found that at least the following problems exist in the related art:

[0005] Although the related art can realize the independent movement of the main door and the auxiliary door, the main door and the auxiliary door have two rotating axes, and the structure is complicated.

[0006] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of this application, and therefore may include information that does not constitute prior art known to ordinary technicians in this field. Summary of the Invention

[0007] In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an extensive review, nor is it intended to identify key / critical elements or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

[0008] The embodiment of the present disclosure provides a refrigerator that can realize independent movement of an inner door and an outer door and has a simple structure.

[0009] According to a first aspect of an embodiment of the present invention, a refrigerator is provided, comprising: a cabinet; an inner door that can be opened and closed and is arranged on the cabinet; an outer door that can be opened and closed and is arranged on the inner door; a connecting piece that is arranged on the inner door, the connecting piece being provided with an axial hole; a cabinet hinge and a door hinge; wherein, one end of the cabinet hinge is connected to the cabinet, and one end of the door hinge is connected to the outer door, and the other end of the cabinet hinge and the other end of the door hinge are both arranged in the axial hole and can both rotate relative to the axial hole, and the other end of the cabinet hinge can rotate relative to the other end of the door hinge, or, one of the other end of the cabinet hinge and the other end of the door hinge is arranged in the axial hole and can rotate relative to the axial hole, and the other is sleeved on the outside of the connecting piece and can rotate relative to the connecting piece.

[0010] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] One or more embodiments are exemplarily described by corresponding drawings. These exemplary descriptions and drawings do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements. The drawings do not constitute a scale limitation. In addition,

[0012] FIG1 is a schematic structural diagram of a refrigerator provided in a first embodiment of the present disclosure;

[0013] FIG2 is a partial cross-sectional structural diagram of a refrigerator provided in Example 1 of the present disclosure;

[0014] FIG3 is a partial cross-sectional structural diagram of a refrigerator provided in Example 2 of the present disclosure;

[0015] FIG4 is a schematic structural diagram of the top surfaces of the inner door and the outer door provided in an embodiment of the present disclosure;

[0016] FIG5 is a partially enlarged schematic diagram of a refrigerator provided by an embodiment of the present disclosure;

[0017] FIG6 is a partially enlarged schematic diagram of another refrigerator provided by an embodiment of the present disclosure;

[0018] FIG7 is a schematic structural diagram of a coaxial hinge limiting structure for a refrigerator in a closed door state provided by an embodiment of the present disclosure;

[0019] FIG8 is a schematic structural diagram of FIG7 without the box hinge;

[0020] FIG9 is a schematic structural diagram of a coaxial hinge limiting structure for a refrigerator in an open state according to an embodiment of the present disclosure;

[0021] FIG10 is a schematic structural diagram of FIG9 without the box hinge;

[0022] FIG11 is a structural diagram of another coaxial hinge limiting structure for a refrigerator provided by an embodiment of the present disclosure, with the outer door in an open state;

[0023] FIG12 is a schematic structural diagram of FIG11 without the box hinge;

[0024] FIG13 is a schematic structural diagram of a fixing member provided in an embodiment of the present disclosure;

[0025] FIG14 is a schematic structural diagram of a coaxial hinge limiting structure for a refrigerator provided in an embodiment of the present disclosure.

[0026] Figure markings: 1: refrigerator; 2: cabinet; 3: inner door; 31: mounting groove; 32: first groove; 4: outer door; 41: second groove; 5: connecting piece; 51: shaft hole; 511: axis; 6: cabinet hinge; 61: cabinet hinge shaft; 62: cabinet hinge body; 63: first avoidance portion; 7: door hinge; 71: door hinge shaft; 72: door hinge body; 73: hinge hole; 74: second avoidance portion; 8: first gap; 9: second gap; 10: first limiting structure; 11: first limiting matching structure; 12: fixing piece; 121: second limiting matching structure; 122: positioning structure; 13: second limiting structure; 14: first preset angle; 15: second preset angle; 16: door closing stop; 17: third limiting matching structure; 18: protruding height of the first limiting structure; 19: gap. DETAILED DESCRIPTION

[0027] In order to be able to understand the features and technical content of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The accompanying drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the sake of convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0028] In the description and claims of the embodiments of the present disclosure, as well as in the accompanying drawings, the terms "first," "second," and the like are used to distinguish similar items and are not necessarily used to describe a particular order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate to describe the embodiments of the present disclosure. Furthermore, the terms "including," "having," and any variations thereof are intended to cover non-exclusive inclusions.

[0029] In the embodiments of the present disclosure, the terms "upper", "lower", "inside", "middle", "outside", "front", "back" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are mainly intended to better describe the embodiments of the present disclosure and their embodiments, and are not intended to limit the indicated devices, elements or components to having a specific direction, or to be constructed and operated in a specific direction. Moreover, in addition to being used to indicate directions or positional relationships, some of the above terms may also be used to indicate other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in certain circumstances. For those of ordinary skill in the art, the specific meanings of these terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0030] Furthermore, the terms "disposed," "connected," and "fixed" should be interpreted broadly. For example, "connected" can mean a fixed connection, a removable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediary, or an internal connection between two devices, elements, or components. Those skilled in the art will understand the specific meanings of these terms in the embodiments of this disclosure based on the specific circumstances.

[0031] Unless otherwise stated, the term "plurality" means two or more.

[0032] In the embodiment of the present disclosure, the character " / " indicates that the preceding and following objects are in an "or" relationship. For example, A / B means: A or B.

[0033] The term "and / or" describes an association between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or A and B.

[0034] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present disclosure can be combined with each other.

[0035] The reference to any prior art in the specification is not and should not be taken as an admission or any form of suggestion that the prior art forms part of the common general knowledge in the application area or any other jurisdiction, or that the prior art could reasonably be understood and regarded as relevant by a person skilled in the art.

[0036] As shown in Figures 1 to 3, an embodiment of the present disclosure provides a refrigerator 1. Refrigerator 1 includes a housing 2, an inner door 3, and an outer door 4. Inner door 3 is openably and closably mounted on housing 2, for example, rotatably connected to housing 2. Outer door 4 is openably and closably mounted on inner door 3, for example, rotatably connected to inner door 3. Refrigerator 1 also includes a connector 5, which is mounted on inner door 3 and has an axis hole 51. Refrigerator 1 also includes a housing hinge 6 and a door hinge 7.

[0037] Among them, one end of the box hinge 6 is connected to the box 2, and one end of the door hinge 7 is connected to the outer door 4. As shown in Figure 2, the other end of the box hinge 6 and the other end of the door hinge 7 are both arranged in the shaft hole 51 (as shown in Figure 3), and can both rotate relative to the shaft hole 51, and the other end of the box hinge 6 can rotate relative to the other end of the door hinge 7, so that the inner door 3 and the outer door 4 can be opened and closed independently.

[0038] In this solution, the rotation of the door hinge 7 relative to the axis hole 51 enables the opening and closing of the outer door 4, and the rotation of the box hinge 6 relative to the axis hole 51 enables the opening and closing of the inner door 3. The other end of the box hinge 6 and the other end of the door hinge 7 are both disposed within the axis hole 51, so that the rotation axis of the inner door 3 and the rotation axis of the outer door 4 coincide with the axis 511 of the axis hole 51.

[0039] Alternatively, as shown in Figure 3, one of the other end of the box hinge 6 and the other end of the door hinge 7 is arranged in the shaft hole 51 and can rotate relative to the shaft hole 51, and the other is sleeved on the outside of the connecting member 5 and can rotate relative to the connecting member 5.

[0040] When the box hinge 6 is arranged in the shaft hole 51 and can rotate relative to the shaft hole 51, the inner door 3 can be opened and closed. When the door hinge 7 is arranged on the outside of the connecting member 5 and can rotate relative to the connecting member 5, the outer door 4 can be opened and closed.

[0041] When the door hinge 7 is arranged in the shaft hole 51 and can rotate relative to the shaft hole 51, the outer door 4 can be opened and closed. When the box hinge 6 is arranged on the outside of the connecting member 5 and can rotate relative to the connecting member 5, the inner door 3 can be opened and closed.

[0042] In this solution, whether the box hinge 6 or the door hinge 7 is arranged in the shaft hole 51, the rotation axis of the inner door 3 and the rotation axis of the outer door 4 can be coincident, both of which are the axis 511 of the shaft hole 51.

[0043] In the refrigerator 1 provided by the embodiment of the present disclosure, the outer door 4 cooperates with the door hinge 7, allowing the outer door 4 to rotate relative to the inner door 3, thereby achieving independent movement of the outer door 4; the inner door 3 cooperates with the cabinet hinge 6, allowing the inner door 3 to rotate relative to the cabinet 2, thereby achieving independent movement of the inner door 3. Furthermore, the cabinet hinge 6 is inserted into the axial hole 51 of the connecting member 5 or is mounted on the outside of the connecting member 5, and the door hinge 7 is inserted into the axial hole 51 of the connecting member 5 or is mounted on the outside of the connecting member 5. That is, the rotation axes of the outer door 4 and the inner door 3 are coaxial. Compared with related technologies, the structure is simpler and the production speed is faster.

[0044] Optionally, the outer door 4 includes a handle, which can drive the outer door 4 and the inner door 3 to move as a whole relative to the box body 2.

[0045] Optionally, as shown in FIG. 4 , the inner door 3 is provided with a mounting groove 31 , and the connecting member 5 is located in the mounting groove 31 .

[0046] Optionally, the connecting member 5 is made of self-lubricating material.

[0047] In this way, a connecting member 5 is added to the mounting groove 31, and the connecting member 5 is made of self-lubricating material, which can avoid direct contact between the box hinge 6 and the mounting groove 31 and / or direct contact between the door hinge 7 and the mounting groove 31, reduce friction, and make the rotation of the inner door 3 and the outer door 4 smoother.

[0048] Specifically, taking the upper hinge of the box body or the upper hinge of the door body as an example, at this time, the upper hinge of the box body and the upper hinge of the door body are both arranged at the top of the box body 2, and the installation groove 31 is arranged at the top of the inner door 3 facing the direction of extension of the inner door 3; taking the lower hinge of the box body or the lower hinge of the door body as an example, at this time, the lower hinge of the box body and the lower hinge of the door body are both arranged at the bottom end of the box body 2, and the installation groove 31 is arranged at the bottom end of the inner door 3 facing the direction of extension of the inner door 3.

[0049] Optionally, the connecting member 5 is made of polyformaldehyde (POM).

[0050] POM has high mechanical strength, very similar to metal, good wear resistance and self-lubrication, good electrical insulation, and low cost. Therefore, designing connector 5 with POM material reduces friction with cabinet hinge 6, door hinge 7, and mounting slot 31 while maintaining mechanical strength similar to metal. Furthermore, due to the good electrical insulation properties of POM material, there is no risk of connector 5 conducting electricity in the event of a leakage in refrigerator 1.

[0051] Optionally, the connecting member 5 is made of polytetrafluoroethylene.

[0052] Polytetrafluoroethylene (PTFE) has a low coefficient of friction, good self-lubrication, and corrosion resistance. Therefore, the connector 5 is designed to be made of PTFE. This reduces friction with the box hinge 6, door hinge 7, and mounting slot 31, and the portion of the connector exposed to air is less susceptible to corrosion.

[0053] Example 1:

[0054] As shown in Figure 2 , the box hinge 6 includes a box hinge shaft 61 and a box hinge body 62, wherein the box hinge shaft 61 is inserted into the shaft hole 51 and can rotate relative to the shaft hole 51, one end of the box hinge body 62 is fixedly connected to the box, and the other end of the box hinge body 62 is fixedly connected to the box hinge shaft 61. The door hinge 7 includes a door hinge shaft 71 and a door hinge body 72, wherein the door hinge shaft 71 is inserted into the shaft hole 51 and can rotate relative to the shaft hole 51, one end of the door hinge body 72 is connected to the outer door 4, for example, fixedly connected, and the other end of the door hinge body 72 is fixedly connected to the door hinge shaft 71.

[0055] Optionally, a hinge hole 73 is provided on the surface of the door hinge shaft 71 facing away from the shaft hole 51 , and the box hinge shaft 61 is inserted into the hinge hole 73 .

[0056] The box hinge shaft 61 always remains stationary, and the outer door 4 drives the door hinge shaft 71 to rotate relative to the shaft hole 51 to open or close the outer door 4. The inner door 3 drives the shaft hole 51 and the hinge hole 73 to rotate as a whole relative to the box hinge shaft 61, that is, the inner door 3 drives the connecting part 5 and the door hinge shaft 71 to rotate together to open or close the inner door 3.

[0057] Optionally, when the box hinge shaft 61 is inserted into the hinge hole 73, the door hinge shaft 71 is made of self-lubricating material.

[0058] When the box hinge shaft 61 is inserted into the hinge hole 73, the door hinge shaft 71 and the box hinge shaft 61 are in direct contact. At this time, designing the door hinge shaft 71 as a self-lubricating material can effectively reduce the friction between the hinge hole 73 and the box hinge shaft 61, making the rotation process of the inner door 3 smoother.

[0059] Alternatively, a box hinge hole is provided on the surface of the box hinge shaft 61 facing away from the shaft hole 51, and the door hinge shaft 71 is inserted into the box hinge hole.

[0060] The box hinge shaft 61 always remains stationary, and the outer door 4 drives the door hinge shaft 71 to rotate relative to the box hinge hole to open or close the outer door 4, and the inner door 3 drives the shaft hole 51 to rotate relative to the box hinge shaft 61 to open or close the inner door 3.

[0061] Optionally, when the door hinge shaft 71 is inserted into the box hinge hole, the box hinge shaft 61 is made of self-lubricating material.

[0062] When the door hinge shaft 71 is inserted into the box hinge hole, the door hinge shaft 71 and the box hinge shaft 61 are in direct contact. At this time, the box hinge shaft 61 is designed to be a self-lubricating material, which can effectively reduce the friction between the door hinge shaft 71 and the box hinge hole, making the rotation process of the outer door 4 smoother.

[0063] Optionally, the door hinge body 72 is made of metal and is connected to the door hinge shaft 71 made of self-lubricating material through an integral injection molding process.

[0064] Optionally, the box hinge body 62 and the box hinge shaft 61 are fixedly connected by threads.

[0065] Alternatively, optionally, the box hinge body 62 is made of metal and is connected to the box hinge shaft 61 made of self-lubricating material through an integral injection molding process.

[0066] Optionally, the door hinge body 72 and the door hinge shaft 71 are fixedly connected by threads.

[0067] The box hinge shaft 61 always remains stationary, and the outer door 4 drives the door hinge shaft 71 to rotate relative to the shaft hole 51 to open or close the outer door 4. The inner door 3 drives the connecting piece 5 and the door hinge shaft 71 to rotate relative to the box hinge shaft 61 to open or close the inner door 3.

[0068] Optionally, as shown in Figure 4, the inner door 3 is provided with a first groove 32, the door hinge body 72 is partially provided in the first groove 32, and the box hinge body 62 is located on the side of the door hinge body 72 away from the bottom wall of the first groove 32.

[0069] Taking the case where the door hinge 7 and the box hinge 6 are arranged at the top of the box body 2 as an example, the top surface of the inner door 3 is recessed to form a first groove 32 with an opening facing upward; taking the case where the door hinge 7 and the box hinge 6 are arranged at the bottom end of the box body 2 as an example, the bottom surface of the inner door 3 is recessed to form a first groove 32 with an opening facing downward.

[0070] Thus, the door hinge body 72 is first installed in the first groove 32, and after the inner door 3 and outer door 4 are assembled together, the inner door 3 and outer door 4 are assembled to the box body 2 by installing the box hinge 6. This facilitates assembly line operation, reduces assembly difficulty, and increases assembly speed. By providing the first groove 32 in the inner door 3, the door hinge 7 is located in the first groove 32, preventing the door hinge 7 from protruding, resulting in a neater and more beautiful visual effect, and the height of the inner door 3 is not increased due to the provision of the box hinge 6.

[0071] Optionally, as shown in FIG. 5 and FIG. 6 , a first gap L1 is provided between the box hinge body 62 and the door hinge body 72 .

[0072] On the one hand, by adjusting the size of the first gap L1, the height of the inner door 3 can be adjusted so that the end face of the inner door 3 and the end face of the box body 2 remain at the same horizontal plane. On the other hand, the first gap L1 can also avoid friction between the door hinge body 72 and the box hinge body 62 during rotation.

[0073] Optionally, a second gap L2 is provided between the door hinge body 72 and the bottom wall surface of the first groove 32 , wherein L2 ≤ L1 .

[0074] The second gap L2 is designed to prevent friction between the door hinge body 72 and the bottom wall of the first groove 32 during rotation. Because the height of the inner door 3 does not need to be adjusted by the second gap L2, L2 is designed to be less than L1. The second gap L2 is designed to be lower, which lowers the center of gravity of the door hinge 7 and makes the door hinge 7 more stable during rotation.

[0075] Optionally, the door hinge body 72 is connected to the surface of the outer door 4 facing the inner door 3, or the door hinge body 72 is connected to the top surface or the bottom surface of the outer door 4. For example, taking the example of the door hinge 7 and the box hinge 6 being arranged at the top of the box 2, the door hinge body 72 is connected to the top surface of the outer door 4 or the surface of the outer door 4 facing the inner door 3; taking the example of the door hinge 7 and the box hinge 6 being arranged at the bottom of the box 2, the door hinge body 72 is connected to the bottom surface of the outer door 4 or the surface of the outer door 4 facing the inner door 3.

[0076] In this way, the connection forms between the door hinge body 72 and the outer door 4 are various.

[0077] Optionally, the door hinge body 72 is fixedly connected to the outer door 4 by screws.

[0078] Optionally, as shown in Figure 4, when the door hinge body 72 is connected to the top surface or bottom surface of the outer door 4, the top surface or bottom surface of the outer door 4 is provided with a second groove 41, and the door hinge body 72 is partially provided in the second groove 41.

[0079] Taking the example of the door hinge 7 and the box hinge 6 being arranged at the top of the box body 2, the top surface of the outer door 4 is recessed to form a second groove 41 with the opening facing upward; taking the example of the door hinge 7 and the box hinge 6 being arranged at the bottom end of the box body 2, the bottom surface of the outer door 4 is recessed to form a second groove 41 with the opening facing downward.

[0080] In this way, by setting a second groove 41 on the top or bottom surface of the outer door 4, the door hinge is embedded in the second groove 41, which makes the visual effect neater and more beautiful, and the height of the outer door 4 will not be increased due to the setting of the door hinge 7.

[0081] As shown in Figures 7 to 12, the embodiment of the present disclosure provides a coaxial hinge limiting structure for a refrigerator 1, including a door hinge 7, which is configured to connect the outer door 4 and the inner door 3 to open or close the outer door 4. The coaxial hinge limiting structure also includes a cabinet hinge 6, which is configured to connect the inner door 3 and the cabinet 2 to open or close the inner door 3, wherein the cabinet hinge 6 is coaxially arranged with the door hinge 7, and the shaft hole 51 is located in the inner door 3. The coaxial hinge limiting structure also includes a first limiting structure 10 and a first limiting matching structure 11. The first limiting structure 10 is provided on the door hinge 7, and the first limiting matching structure 11 is provided on the cabinet hinge 6. When the inner door 3 is opened to a first preset angle 14, the first limiting structure 10 conflicts with the first limiting matching structure 11 to restrict the first limiting structure 10 from continuing to move beyond the first limiting matching structure 11. The coaxial hinge limiting structure also includes a second limiting structure 13 and a second limiting matching structure 121. The second limiting structure 13 is arranged on the door body hinge 7, and the second limiting matching structure 121 is arranged on the inner door 3. When the outer door 4 is opened to the second preset angle 15, the second limiting structure 13 conflicts with the second limiting matching structure 121 to limit the second limiting structure 13 from continuing to move beyond the second limiting matching structure 121.

[0082] The coaxial hinge limiting structure for a refrigerator 1 provided in an embodiment of the present disclosure is adopted. A first limiting structure 10 and a second limiting structure 13 are provided on the door hinge 7, a first limiting matching structure 11 is provided on the cabinet hinge 6, and a second limiting matching structure 121 is provided on the inner door 3. When the inner door 3 is opened to a first preset angle 14, the first limiting structure 10 and the first limiting matching structure 11 interfere with each other to restrict the first limiting structure 10 from continuing to move beyond the first limiting matching structure 11, thereby limiting the inner door 3. When the outer door 4 is opened to a second preset angle 15, the second limiting structure 13 and the second limiting matching structure 121 interfere with each other to restrict the second limiting structure 13 from continuing to move beyond the second limiting matching structure 121, thereby limiting the outer door 4. At the same time, the first limiting structure 10 and the second limiting structure 13 are integrated into a single door hinge 7, which reduces the number of components, eases installation difficulty, and improves assembly speed.

[0083] Optionally, in combination with Figures 7 and 8, along the opening direction of the inner door 3, the first limiting structure 10 and the second limiting structure 13 are arranged in sequence, the first limiting matching structure 11 and the second limiting matching structure 121 are arranged in sequence, and the central angle corresponding to the first limiting structure 10 and the first limiting matching structure 11 is greater than the central angle corresponding to the second limiting structure 13 and the second limiting matching structure 121.

[0084] It can be understood that the first limiting structure 10 and the first limiting matching structure 11 are on the same circumference, and the center of the circumference is located at the axis 511 of the shaft hole 51; the second limiting structure 13 and the second limiting matching structure 121 are on the same circumference, and the center of the circumference is located at the axis 511 of the shaft hole 51.

[0085] It can be understood that the central angle corresponding to the first limiting structure 10 and the first limiting matching structure 11, i.e., the first preset angle 14, and the central angle corresponding to the second limiting structure 13 and the second limiting matching structure 121, i.e., the second preset angle 15, are greater than the central angle corresponding to the second limiting structure 13 and the second limiting matching structure 121. Therefore, the first preset angle 14 is greater than the second preset angle 15. In this way, when the outer door 4 is opened to the second preset angle 15, the position of the outer door 4 is limited, but the first limiting structure 10 and the first limiting matching structure 11 used to limit the maximum opening angle of the inner door 3 have not yet conflicted, and the inner door 3 can continue to move. Therefore, the opening of the outer door 4 will not limit the opening angle of the inner door 3. Moreover, the opening angles of the inner door 3 and the outer door 4 do not need to be the same angle, avoiding the problem of the inner door 3 and the outer door 4 being coaxial and limiting each other's opening angles.

[0086] Optionally, the first preset angle 14 is m, and the second preset angle 15 is n, wherein 30°≤m≤150°, and 30°≤n≤150°.

[0087] 30°≤m≤150°, more specifically, m=40°, 50°, 60°, 70°, 80°, 90°, 100°, 110° or 120°.

[0088] 30°≤n≤150°, more specifically, n=40°, 50°, 60°, 70°, 80°, 90°, 100°, 110° or 120°.

[0089] Optionally, the distance between the first limiting structure 10 and the shaft hole 51 is smaller than the distance between the second limiting structure 13 and the shaft hole 51 .

[0090] Because the first limiting matching structure 11 cooperates with the first limiting structure 10 to limit the first limiting structure 10 from continuing to move beyond the first limiting matching structure 11, the closer the first limiting structure 10 is set to the shaft hole 51, the closer the first limiting matching structure 11 is also to the shaft hole 51. This can reduce the material area of ​​the box hinge 6 and save costs. The box hinge 6 occupies a smaller installation space and is more beautiful overall.

[0091] Optionally, in combination with Figures 5 and 8, the door hinge 7 and the box hinge 6 are arranged in sequence along the direction away from the box 2, and a first gap 8 is formed between the door hinge 7 and the box hinge 6. The second limiting structure 13 is arranged on the side of the door hinge facing the first gap 8, and the second limiting matching structure 121 protrudes from the inner door 3 and is partially located in the first gap 8, and a gap 19 is formed between the second limiting matching structure 121 and the box hinge 6, as shown by L4 in Figure 14.

[0092] In this way, a first gap 8 is left between the door hinge 7 and the box hinge 6, which facilitates the cooperation between the second limiting structure 13 and the second limiting matching structure 121, and at the same time reduces the friction generated when the door hinge 7 rotates relative to the box hinge 6.

[0093] Optionally, as shown in Figures 7 and 14, the first limiting structure 10 is protruded from the surface of the door hinge 7 facing the box hinge 6, and the protruding height 18 of the first limiting structure (as shown by L3 in Figure 14) is greater than the height of the first gap 8, and the first limiting matching structure 11 is provided at the outer edge of the box hinge 6 and is in the same plane as the connection with the box hinge 6.

[0094] In this way, the height of the first limiting structure 10 protruding from the door hinge 7 is greater than the height of the first gap 8, ensuring effective cooperation between the first limiting structure 10 and the first limiting matching structure 11. When the inner door 3 rotates to the first preset angle 14, the first limiting structure 10 and the first limiting matching structure 11 can conflict with each other, so that the first limiting structure 10 will not pass through the first gap 8. The first limiting matching structure 11 is in the same plane as the connection between it and the box hinge 6, rather than being protruded from the surface of the box hinge 6 facing away from the box 2. This design of being in the same plane can save space and be more beautiful. It is also not protruded from the surface of the box hinge 6 facing the door hinge 7. This design of being in the same plane can avoid affecting the rotation of the second limiting structure 13.

[0095] Optionally, the second limiting structure 13 is provided at the outer edge of the door hinge 7 and is in the same plane as the connection point of the door hinge 7 .

[0096] The second limiting structure 13 is arranged on the outer edge of the door hinge 7 and is in the same plane as the connection point of the door hinge 7, which facilitates the integrated molding of the second limiting structure 13 and the door hinge 7, reduces the difficulty of assembling the second limiting structure 13 and the door hinge 7, and saves costs.

[0097] Optionally, the second limiting structure 13 is protruded from the surface of the door hinge 7 facing the box hinge 6 , and the protruding height of the second limiting structure is smaller than the height of the first gap 8 .

[0098] In this way, the height of the second limiting structure 13 protruding from the door hinge 7 is less than the height of the first gap 8, ensuring that the second limiting structure 13 can rotate within the first gap 8 without conflicting with the box hinge 6, thereby ensuring the effective cooperation between the second limiting structure 13 and the second limiting cooperation structure 121 to limit the maximum opening angle of the outer door 4.

[0099] Optionally, as shown in Figure 7, the outer edge of the box hinge 6 is provided with a first avoidance portion 63 for avoiding the first limiting structure 10. When the inner door 3 is in the closed position, the first avoidance portion 63 is located between the first limiting structure 10 and the first limiting matching structure 11.

[0100] During the process of opening the inner door 3, the first limiting structure 10 is avoided by the first avoidance portion 63, so that the first limiting structure 10 smoothly passes through the first avoidance portion 63 to reach the first limiting matching structure 11. At this time, the first limiting structure 10 conflicts with the first limiting matching structure 11, and the inner door 3 smoothly reaches the maximum door opening position.

[0101] Optionally, as shown in Figure 10, the outer edge of the door hinge 7 is provided with a second avoidance portion 74 for avoiding the second limiting matching structure 121. When the outer door 4 is in the closed position, the first avoidance portion 63 is located between the second limiting structure 13 and the second limiting matching structure 121.

[0102] During the process of opening the outer door 4, the second avoidance portion 74 avoids the second limit matching structure 121, so that the second limit structure 13 smoothly reaches the second limit matching structure 121. At this time, the second limit structure 13 conflicts with the second limit matching structure 121, and the outer door 4 smoothly reaches the maximum door opening position.

[0103] Optionally, as shown in Figure 7, the coaxial hinge limiting structure for refrigerator 1 further includes a door closing stop 16 and a third limiting matching structure 17. The door closing stop 16 is provided on the inner door 3, and the third limiting matching structure 17 is provided on the outer edge of the cabinet hinge 6, with the third limiting matching structure 17 being arranged opposite the first limiting matching structure 11. When the inner door 3 is opened, the door closing stop 16 rotates with the inner door 3 relative to the third limiting matching structure 17.

[0104] It can be understood that the door closing stop 16 and the third limit matching structure 17 can be separated and matched. When the door closing stop 16 and the third limit matching structure 17 are separated, the inner door 3 opens, and when the door closing stop 16 and the third limit matching structure 17 are matched, the inner door 3 closes.

[0105] In this way, when the door closing stopper 16 cooperates with the third limiting matching structure 17, the inner door 3 is restricted from opening due to shaking when the inner door is closed, causing cooling loss and increased energy consumption.

[0106] Optionally, one of the door closing stopper 16 and the third position-limiting matching structure 17 is a groove, and the other is a protrusion, and the protrusion can be snapped into the groove.

[0107] In this way, the door closing stop 16 is engaged with the third position-limiting matching structure 17 by engaging the protrusion with the groove, so as to limit the closed state of the inner door 3 and reduce the risk of the inner door 3 opening due to shaking.

[0108] Optionally, as shown in FIG13 , the coaxial hinge limiting structure for the refrigerator 1 further includes a fixing member 12 , which is provided on the inner door 3 , wherein the second limiting matching structure 121 is provided on the surface of the fixing member 12 away from the box body 2 .

[0109] Optionally, the fixing member 12 further includes a positioning structure 122 , which is provided on a surface of the fixing member 12 facing away from the box body 2 . The door closing stopper 16 is provided on the positioning structure 122 .

[0110] It is understood that the fixing member 12 is fixed to the position of the inner door 3, and the position between the door closing stop 16 and the positioning structure 122 is fixed and does not rotate. Thus, when the inner door 3 rotates, the fixing member 12 rotates, and the positioning structure 122 located on the fixing member 12 rotates accordingly, thereby driving the door closing stop 16 to rotate, so that the door closing stop 16 can rotate relative to the third limiting matching structure 17.

[0111] In addition, by arranging both the positioning structure 122 and the second position-limiting matching structure 121 on the fixing member 12 , the number of components can be reduced, the difficulty of assembly can be lowered, and the speed of assembly can be increased.

[0112] As shown in FIG1 , an embodiment of the present disclosure provides a refrigerator 1. Refrigerator 1 includes a housing 2 defining a refrigeration space. Refrigerator 1 also includes an inner door 3, which is openable and closable within housing 2 to open and close the refrigeration space. Refrigerator 1 also includes an outer door 4, which is openable and closable within inner door 3. Refrigerator 1 also includes a coaxial hinge retaining structure for refrigerator 1.

[0113] The refrigerator 1 provided by the embodiment of the present disclosure is provided with a first limiting structure 10 and a second limiting structure 13 on the door hinge 7, a first limiting matching structure 11 on the cabinet hinge 6, and a second limiting matching structure 121 on the inner door 3. When the inner door 3 is opened to a first preset angle 14, the first limiting structure 10 and the first limiting matching structure 11 interfere with each other to restrict the first limiting structure 10 from continuing to move beyond the first limiting matching structure 11, thereby limiting the inner door 3. When the outer door 4 is opened to a second preset angle 15, the second limiting structure 13 and the second limiting matching structure 121 interfere with each other to restrict the second limiting structure 13 from continuing to move beyond the second limiting matching structure 121, thereby limiting the outer door 4. At the same time, the first limiting structure 10 and the second limiting structure 13 are combined on a single door hinge 7, which reduces the number of components, reduces the difficulty of installation, and improves the assembly speed.

[0114] Example 2:

[0115] The difference from the first embodiment is that, as shown in FIG3 , the box hinge shaft 61 is inserted into the shaft hole 51 and can rotate relative to the shaft hole 51 , and the door hinge shaft 71 is sleeved on the outside of the connecting member 5 and can rotate relative to the connecting member 5 .

[0116] The box hinge shaft 61 always remains stationary, the outer door 4 drives the door hinge shaft 71 to rotate relative to the connecting member 5 to open or close the outer door 4, and the inner door 3 drives the shaft hole 51 to rotate relative to the box hinge shaft 61 to open or close the inner door 3.

[0117] Example 3:

[0118] The difference from the first embodiment is that the box hinge shaft 61 is sleeved on the outside of the connecting member 5 and can rotate relative to the connecting member 5, and the door hinge shaft 71 is inserted into the shaft hole 51 and can rotate relative to the shaft hole 51.

[0119] The above description and the accompanying drawings sufficiently illustrate the embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Unless expressly required, individual components and functions are optional, and the order of operations may vary. Portions and features of some embodiments may be included in or replace portions and features of other embodiments. The embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A refrigerator, comprising: Box; An inner door, which can be opened and closed, is arranged on the box body; The outer door can be opened and closed and is located inside the inner door; A connecting piece is arranged on the inner door, and the connecting piece is provided with an axis hole; Box hinges and door hinges; Among them, one end of the box hinge is connected to the box, and one end of the door hinge is connected to the outer door. The other ends of the box hinge and the door hinge are both arranged in the shaft hole and can rotate relative to the shaft hole, and the other end of the box hinge can rotate relative to the other end of the door hinge. Alternatively, one of the other ends of the box hinge and the door hinge is arranged in the shaft hole and can rotate relative to the shaft hole, and the other is sleeved on the outside of the connecting piece and can rotate relative to the connecting piece.

2. The refrigerator according to claim 1, wherein: The inner door is provided with a mounting groove, and the connecting piece is located in the mounting groove.

3. The refrigerator according to claim 1, wherein: The connecting parts are made of self-lubricating material.

4. The refrigerator according to any one of claims 1 to 3, wherein: The cabinet hinges include: The box hinge shaft is inserted into the shaft hole and can rotate relative to the shaft hole or is sleeved on the outside of the connecting piece and can rotate relative to the connecting piece; The box hinge body has one end connected to the box and the other end connected to the box hinge shaft; Door hinges include: The door hinge shaft is inserted into the shaft hole and can rotate relative to the shaft hole or is sleeved on the outside of the connecting piece and can rotate relative to the connecting piece; The door hinge body has one end connected to the outer door and the other end connected to the door hinge shaft.

5. The refrigerator according to claim 4, wherein: When the door hinge shaft and the box hinge shaft are both arranged in the shaft hole, the door hinge shaft is made of self-lubricating material.

6. The refrigerator according to claim 4, wherein: The inner door is provided with a first groove, the door hinge body is partially arranged in the first groove, and the box hinge body is located on the side of the door hinge body away from the bottom wall surface of the first groove.

7. The refrigerator according to claim 6, wherein: A first gap L1 is provided between the box hinge body and the door hinge body.

8. The refrigerator according to claim 7, wherein: A second gap L2 is provided between the door hinge body and the bottom wall surface of the first groove, wherein L2≤L1.

9. The refrigerator according to claim 4, wherein: The door hinge body is connected to the surface of the outer door facing the inner door, or connected to the top end surface or the bottom end surface of the outer door.

10. The refrigerator according to claim 9, wherein: When the door hinge body is connected to the top end surface or the bottom end surface of the outer door, the top end surface or the bottom end surface of the outer door is provided with a second groove, and the door hinge body is partially arranged in the second groove.

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