Door-in-door refrigerator

Abstract

The application relates to the technical field of refrigerators, and discloses a door-in-door refrigerator. The door-in-door refrigerator comprises a cabinet provided with a cabinet opening and a control part; a main door arranged on the cabinet and used for closing or opening the cabinet opening, the main door being provided with main door electrical components; a main door hinge used for rotatably connecting the main door and the cabinet; a sub-door arranged on the main door, the sub-door being provided with sub-door electrical components; a sub-door hinge used for rotatably connecting the sub-door and the main door; a wire harness comprising a sub-door wire harness and a main door wire harness, the sub-door wire harness being used for connecting the sub-door electrical components and the control part, and the main door wire harness being used for connecting the main door electrical components and the control part; wherein the sub-door wire harness passes through the main door hinge and the sub-door hinge, and the main door wire harness passes through the main door hinge. The door-in-door refrigerator provides more space for accommodating the wire harness, and avoids wire harness abrasion caused by partial wire harness exposure.

Description

Technical Field

[0001] This application relates to the field of refrigerator technology, for example to a door-in-door refrigerator. Background Technology

[0002] A refrigerator is a refrigeration device that provides a constant low temperature for food or other items inside. A refrigerator typically consists of a cabinet and a door hinged to the cabinet. With economic development, the door has become increasingly functional, meaning it houses more and more electrical appliances. These appliances need to communicate with a controller located within the cabinet via wiring harnesses.

[0003] In related technologies, the hinge has a connecting cavity inside, through which the wiring harness passes to connect to the controller located in the housing.

[0004] In the process of implementing the embodiments of this disclosure, at least the following problems were found in the related art: Refrigerator doors are becoming increasingly multifunctional and thinner, resulting in more and more electrical appliances inside. However, the thinner door design leads to smaller connecting cavities. When there are many electrical appliances inside the door, the connecting cavities inside the hinges cannot accommodate all the wiring harnesses, leaving some harnesses exposed and prone to wear and tear. Summary of the Invention

[0005] To provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. This summary is not intended as a general commentary, nor is it intended to identify key / important components or describe the scope of protection of these embodiments, but rather as a prelude to the detailed description that follows.

[0006] This disclosure provides a door-in-door refrigerator that offers more space for accommodating wiring harnesses, thus avoiding wear and tear caused by some wiring harnesses being exposed to the outside.

[0007] In some embodiments, the door-in-door refrigerator includes: a cabinet body with a door opening and a control unit; a main door disposed on the cabinet body for closing or opening the door opening, the main door having a main door electrical component; a main door hinge for rotatably connecting the main door to the cabinet body; a secondary door disposed on the main door, the secondary door having a secondary door electrical component; a secondary door hinge for rotatably connecting the secondary door to the main door; and a wiring harness including a secondary door wiring harness and a main door wiring harness, the secondary door wiring harness for connecting the secondary door electrical component to the control unit, and the main door wiring harness for connecting the main door electrical component to the control unit; wherein the secondary door wiring harness passes through the main door hinge and the secondary door hinge, and the main door wiring harness passes through the main door hinge.

[0008] Optionally, the secondary door wiring harness passes through the secondary door hinge from bottom to top, enters the main door from the top of the secondary door hinge, then passes through the main door hinge from bottom to top, and enters the housing from the top of the main door hinge to connect with the control unit; the main door wiring harness passes through the main door hinge from bottom to top, enters the housing from the top of the main door hinge, and connects with the control unit.

[0009] Optionally, the main door hinge includes: a hinge plate disposed in the housing, the hinge plate having a first spool for accommodating a wire harness; a wire harness plate having a second spool for accommodating a wire harness; and a hinge track plate disposed in the door body, the hinge track plate having a hinge groove and a track groove, the hinge groove for accommodating the first spool, the track groove for accommodating the second spool, the second spool being movable within the track groove; wherein, the secondary door wire harness passes through the first spool and / or the second spool from bottom to top; the main door wire harness passes through the first spool and / or the second spool from bottom to top.

[0010] Optionally, the track groove is configured as a first arc shape, and the second spool deflects within the range of the first arc shape with the first spool as the rotation center; the secondary door wiring harness and the main door wiring harness are provided with a reserved length L, which is used to prevent the main door from rotating and pulling on the secondary door wiring harness and the main door wiring harness.

[0011] Optionally, the reserved length L can be in the range of L≥πR*A / 360, where R is the distance between the axis of the first spool and the axis of the second spool, and A is the maximum deflection angle of the second spool.

[0012] Optionally, the secondary door hinge includes: a hinge shaft with one or more first communication connection ports on its surface; the first communication connection ports being connected to the secondary door electrical components; and a hinge seat with a groove adapted to accommodate the hinge shaft, the inner wall of the groove having one or more second communication connection ports; the second communication connection ports being electrically connected to terminals located on the outer side of the hinge seat, and the second communication connection ports corresponding one-to-one with the first communication connection ports; wherein, when the hinge shaft is inserted into the groove, and the hinge shaft and the hinge seat are relatively stationary and relatively rotating, each first communication connection port is connected to the corresponding second communication connection port to achieve communication.

[0013] Optionally, the secondary door wiring harness includes: a first sub-wiring harness for connecting the first communication connection port and the secondary door electrical component; and a second sub-wiring harness for connecting the second communication connection port to a terminal located outside the hinge seat.

[0014] Optionally, the door-in-door refrigerator further includes: a secondary door hinge box, disposed above the main door and rotatably connected to the secondary door, the secondary door hinge box covering the secondary door hinge; and a main door hinge box, disposed above the cabinet body and rotatably connected to the cabinet body, the main door hinge box covering the main door hinge.

[0015] Optionally, the secondary door wiring harness enters the secondary door hinge box from the upper part of the secondary door hinge, and enters the main door from the lower part of the secondary door hinge box. Then, from the inside of the main door, it passes through the first spool and / or the second spool from bottom to top, and enters the main door hinge box from the upper part of the main door hinge, and then enters the housing from the lower part of the main door hinge box.

[0016] Optionally, the main door wiring harness passes from the inside of the main door, through the first and / or the second reel from bottom to top, and enters the main door hinge box from the upper part of the main door hinge, and then enters the housing from the lower part of the main door hinge box.

[0017] The door-in-door refrigerator provided in this embodiment can achieve the following technical effects: The door-in-door refrigerator provided in this embodiment allows for a rotatable connection between the main door and the refrigerator body via a main door hinge. The main door hinge includes a first and a second reel for accommodating wire harnesses, providing more space for wire routing and preventing wear caused by exposed wires. Furthermore, the second reel is positioned within a track groove and can move within it, allowing the main door to open at a larger angle while the second reel rotates at a smaller angle. Therefore, the pulling force on the wire harness passing through the second reel is reduced during the opening and closing of the main door, lessening wear on the wire harness.

[0018] The above general description and the description below are exemplary and illustrative only and are not intended to limit this application. Attached Figure Description

[0019] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations and drawings do not constitute a limitation on the embodiments. Connection ports with the same reference numerals in the drawings are shown as similar connection ports. The drawings are not to be scaled. And wherein: Figure 1 This is a schematic diagram of the structure of a hinge assembly provided in an embodiment of this disclosure; Figure 2 This is a schematic diagram of the structure of a hinged track plate provided in an embodiment of this disclosure; Figure 3 This is a schematic diagram of the structure of a hinge plate provided in an embodiment of this disclosure; Figure 4This is a schematic diagram of the hinge assembly when the door is in the open state, provided in an embodiment of this disclosure; Figure 5 This is a schematic diagram of the hinge assembly when the door is in the open state, as provided in another embodiment of this disclosure; Figure 6 This is a schematic diagram of the hinge assembly when the door is in the open state, as provided in another embodiment of this disclosure; Figure 7 This is a schematic diagram of another hinge plate provided in an embodiment of this disclosure; Figure 8 This is a schematic diagram of the structure of a wire harness board provided in an embodiment of this disclosure; Figure 9 This is a schematic diagram of a hinge plate and a wire harness plate combined according to an embodiment of the present disclosure; Figure 10 This is a schematic diagram of another hinged track plate provided in an embodiment of this disclosure; Figure 11 This is a schematic diagram of another hinged track plate provided in an embodiment of this disclosure; Figure 12 This is a schematic diagram of a hinged track plate and a wire harness plate combined according to an embodiment of the present disclosure; Figure 13 This is a schematic diagram of the structure of a housing assembly provided in an embodiment of this disclosure; Figure 14 This is a schematic diagram of the wiring of a wire harness provided in an embodiment of this disclosure; Figure 15 This is a cross-sectional schematic diagram of a secondary door hinge provided in an embodiment of this disclosure; Figure 16 This is a schematic diagram of the structure of a hinge shaft provided in an embodiment of this disclosure; Figure 17 This is a cross-sectional schematic diagram of a hinge shaft provided in an embodiment of this disclosure; Figure 18 This is a schematic diagram of the structure of a hinge seat provided in an embodiment of this disclosure; Figure 19 This is a cross-sectional schematic diagram of a hinge seat provided in an embodiment of this disclosure; Figure 20 This is a schematic diagram of another door-in-door refrigerator provided in this embodiment.

[0020] Figure label: 1: Hinge assembly; 11: Hinge plate; 111: First spool; 1111: First side; 1112: Second side; 1113: First opening; 112: First end; 113: Second end; 114: First stop; 115: Second stop; 116: Limiting notch; 12: Wire harness plate; 121: Second spool; 122: First fastener; 123: Second opening; 13: Hinge track plate; 131: Hinge groove; 132: Track groove; 1321: First groove wall; 1322: Second groove wall; 133: Fixing cylinder; 134: Fixing plate; 2: Cabinet; 3: Main door; 4: Main door hinge; 5: Secondary door; 6: Secondary door hinge; 7: Wiring harness; 71: Secondary door wiring harness; 72: Main door wiring harness; 8: Secondary door hinge box; 9: Main door hinge box; 51: Hinge shaft; 511: First communication connection port; 512: First receiving cavity; 52: Hinge seat; 521: Groove; 5211: First cylindrical inner wall; 5212: Second cylindrical inner wall; 5213: First treadle inner wall; 522: Second communication connection port; 523: Fixing part; 5231: Second receiving cavity; 5232: Third receiving cavity; 524: First connecting part; 501: First cylindrical surface; 502: Second cylindrical surface; 503: First treadle surface; 504: First end face; 505: Positioning element. Detailed Implementation

[0021] To provide a more detailed understanding of the features and technical content of the embodiments of this disclosure, the implementation of the embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for illustrative purposes only and are not intended to limit the embodiments of this disclosure. In the following technical description, for ease of explanation, several details are used to provide a full understanding of the disclosed embodiments. However, one or more embodiments may still be implemented without these details. In other cases, well-known structures and devices may be simplified in their depiction to simplify the drawings.

[0022] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this disclosure described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0023] In this disclosure, the terms "upper," "lower," "inner," "middle," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for better description of the embodiments of this disclosure and their implementations, and are not intended to limit the indicated device, connection port, or component to having a specific orientation, or to be constructed and operated in a specific orientation. Furthermore, some of the above terms may be used to indicate other meanings besides orientation or positional relationship; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in the embodiments of this disclosure according to the specific circumstances.

[0024] Furthermore, the terms "set up," "connect," and "fix" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, connection ports, or components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this disclosure according to the specific circumstances.

[0025] Unless otherwise stated, the term "multiple" means two or more.

[0026] In this embodiment of the disclosure, the character " / " indicates that the objects before and after it are in an "or" relationship. For example, A / B means: A or B.

[0027] 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.

[0028] It should be noted that, unless otherwise specified, the embodiments and features described in the present disclosure can be combined with each other.

[0029] This disclosure provides a hinge assembly and a door-in-door refrigerator that offer more space for accommodating wiring harnesses and avoid wiring harness wear caused by partial exposure to the outside.

[0030] In a first aspect, embodiments of this disclosure provide a hinge assembly 1.

[0031] Combination Figure 1 and Figure 2 The hinge assembly 1 provided in this embodiment includes a hinge plate 11, a wire harness plate 12, and a hinge track plate 13.

[0032] A hinge plate 11 is disposed on the housing, and the hinge plate 11 has a first spool 111 for accommodating wire harnesses. A wire harness plate 12 has a second spool 121 for accommodating wire harnesses. A hinge track plate 13 is disposed on the door body, and the hinge track plate 13 has a hinge groove 131 and a track groove 132. The hinge groove 131 is used to accommodate the first spool 111, and the track groove 132 is used to accommodate the second spool 121, and the second spool 121 can move within the track groove 132.

[0033] The hinge assembly 1 provided in this embodiment achieves a rotatable connection between the door and the housing through the cooperation of the hinge plate 11 and the hinge track plate 13. The hinge plate 11 is provided with a first spool 111 for accommodating wire harnesses, and the wire harness plate 12 is provided with a second spool 121 for accommodating wire harnesses, providing more space for accommodating wire harnesses and avoiding wire harness wear caused by partial exposure to the outside. In addition, the second spool 121 is disposed in the track groove 132 and can move within the track groove 132, allowing the door to open at a large angle while the second spool 121 rotates at a smaller angle. Therefore, the pulling force on the wire harness passing through the second spool 121 is smaller when the door opens and closes, reducing wear on the wire harness passing through the second spool 121.

[0034] The hinge assembly 1 achieves a rotatable connection between the door and the box body through the cooperation of the hinge plate 11 and the hinge track plate 13, as detailed below: The hinge plate 11 is fixedly connected to the box body, and the hinge plate 11 is provided with a first spool 111. The hinge track plate 13 is fixedly connected to the door body, and the hinge track plate 13 is provided with a hinge groove 131 and a track groove 132. The hinge groove 131 is used to accommodate the first spool 111, and the hinge groove 131 can rotate around the first spool 111 as the rotation center. By inserting the first spool 111 into the hinge groove 131, the rotatable connection between the hinge plate 11 and the hinge track plate 13 is completed. Furthermore, the rotatable connection between the door body and the box body can be realized.

[0035] The hinge plate 11 is used to connect the door and the box, and can also limit the range of motion of the second reel 121.

[0036] See Figure 3 The first end 112 of the hinge plate 11 is fixedly connected to the housing, and the second end 113 of the hinge plate 11 is provided with a first spool 111. The first spool 111 is adapted to enter the hinge groove 131. This arrangement allows for a rotatable connection between the housing and the hinge track plate 13.

[0037] Optionally, see Figure 3 The top of the first spool 111 is provided with an extension edge. By providing the extension edge, the first spool 111 is firmly fixed to the hinge plate 11, preventing the first spool 111 from falling off the hinge plate 11 under force.

[0038] Optionally, see Figure 3 The first opening 1113 is provided on the side of the first spool 111 away from the first end 112.

[0039] By providing a first opening 1113 on the side of the first spool 111 away from the first end 112, it is convenient for the wire harness to enter the first spool 111.

[0040] Optionally, see Figure 3 The first spool 111 includes a first side 1111 and a second side 1112. The first side 1111 and the second side 1112 are opposite sides, and along the length of the spool, the first side 1111 is closer to the outside of the spool than the second side 1112.

[0041] The refrigerator body has length, width, and height. In normal use, the height of the body extends vertically, the width is the distance between the front and rear panels, and the length is the distance between the two sides. The refrigerator has an opening; the side with the opening is the front panel, and the side opposite the front panel is the rear panel.

[0042] Optionally, see Figure 3 The hinge plate 11 is also provided with a first stop portion 114. The first stop portion 114 is provided at the second end 113 of the hinge plate 11 and is connected to the first side 1111 of the first spool 111. The first stop portion 114 extends in a direction away from the first end 112.

[0043] By setting the first stop 114, the movement range of the second spool 121 can be limited to a suitable range. In this way, it can be avoided that the movement range of the second spool 121 is too large and will cause pulling on the wire bundle inside the second spool 121, and it can also be avoided that the second spool 121 collides with the hinge box.

[0044] Optionally, see Figure 4 When the opening angle of the door is greater than or equal to the first preset angle, the second spool 121 moves within the range defined by the first stop 114 and the track groove 132.

[0045] This design allows the movement range of the second reel 121 to be controlled within a suitable range, preventing wire harness pulling and wear caused by excessive rotation angle of the second reel 121. Furthermore, this design does not affect the opening and closing of the door, nor does it reduce the door's opening angle.

[0046] Optionally, the first stop 114 is linear. This arrangement facilitates the arrangement of the hinge assembly.

[0047] Optionally, see Figure 3The hinge plate 11 is also provided with a second stop 115. The second stop 115 is provided at the second end 113 of the hinge plate 11 and is connected to the second side 1112 of the first spool 111. The second stop 115 extends along the length direction of the box.

[0048] By providing a second stop 115, the movement range of the second spool 121 can be limited to a suitable range. This prevents the second spool 121 from moving too much and causing pulling on the wire bundle inside, and also prevents the second spool 121 from colliding with the hinge box.

[0049] Optionally, see Figure 5 When the opening angle of the door is less than or equal to the second preset angle, the second spool 121 moves within the range defined by the second stop 115 and the track groove 132.

[0050] This design allows the movement range of the second reel 121 to be controlled within a suitable range, preventing wire harness pulling and wear caused by excessive rotation angle of the second reel 121. Furthermore, this design does not affect the opening and closing of the door, nor does it reduce the door's opening angle.

[0051] Optionally, the second stop 115 is an inwardly recessed arc shape. This arrangement facilitates the arrangement of the hinge assembly.

[0052] Optionally, see Figure 6 When the opening angle of the door is less than the first preset angle and greater than the second preset angle, the second spool 121 moves within the range defined by the track groove 132.

[0053] This configuration allows the movement range of the second spool 121 to be controlled within a suitable range, thus avoiding wire harness pulling and wear caused by excessive rotation angle of the second spool 121.

[0054] Optionally, see Figure 7 The extension line of the first stop portion 114 and the external tangent line of the second stop portion 115 form a first included angle α1, and the value of the first included angle α1 is in the range of 75° to 125°. For example, the value of the first included angle α1 can be 75°, 80°, 85°, 90°, 95°, 100°, 120° or 125°, etc.

[0055] Optionally, the maximum angle that the second spool 121 can rotate is less than or equal to the first included angle α1. It is understood that the outer diameter of the second spool 121 affects the maximum angle that the second spool 121 can rotate. When the outer diameter of the second spool 121 is close to zero, the maximum angle that the second spool 121 can rotate is close to the first included angle α1.

[0056] Optionally, combined Figure 7 and Figure 5 The first stop 114, the second stop 115, and the hinge plate 11 together form a limiting notch 116. The second spool 121 is disposed in the limiting notch 116 and moves within the range of the limiting notch 116 with the first spool 111 as the rotation center.

[0057] For the wire harness plate 12, a second wire spool 121 that can move within the track groove 132 is provided to increase the space for accommodating the wire harness.

[0058] Optionally, see Figure 8 The second spool 121 is provided with a second opening 123. This arrangement facilitates the wire harness to pass through the second spool 121.

[0059] Optionally, combined Figure 8 and Figure 9 The second opening 123 is located on the upper part of the second reel 121, and when the refrigerator door is closed, the second opening 123 faces the hinge plate 11. This arrangement facilitates the wire harness passing through the second reel 121 into the refrigerator body.

[0060] Optionally, see Figure 9 The upper surface of the second spool 121 is higher than the upper surfaces of the first stop 114 and the second stop 115.

[0061] With this configuration, when the second spool 121 rotates along the first direction to the first stop 114, the second spool 121 collides with the first stop 114, preventing the second spool 121 from continuing to rotate along the first direction, thereby limiting the rotation of the second spool 121 along the first direction. When the second spool 121 rotates along the second direction to the second stop 115, the second spool 121 collides with the second stop 115, preventing the second spool 121 from continuing to rotate along the second direction, thereby limiting the rotation of the second spool 121 along the second direction.

[0062] The first direction is the direction in which the door opens, and the second direction is the direction in which the door closes.

[0063] Optionally, the outer diameter of the second spool 121 is 10mm to 18mm. For example, the outer diameter of the second spool 121 is 14mm.

[0064] Optionally, combined Figure 8 and Figure 9 The wire harness plate 12 also includes a first fixing member 122. The first fixing member 122 is sleeved on the first wire spool 111 and is fixedly connected to the second wire spool 121.

[0065] By setting a first fixing member 122, which is sleeved on the first spool 111 and fixedly connected to the second spool 121, the second spool 121 and the first spool 111 can rotate around the rotation center.

[0066] Optionally, the first fastener 122 is disposed at the lower part of the second spool 121.

[0067] The hinge track plate 13 is used to rotatably connect the door body to the hinge plate 11. In addition, a track groove 132 is provided for the second spool 121 to limit the deflection angle of the second spool 121.

[0068] Optionally, see Figure 10 The track groove 132 is arc-shaped. This design ensures sufficient movement space for the second reel 121 within the track groove 132 without occupying excessive door space.

[0069] Optionally, the central angle α2 corresponding to the arc can range from 30° to 60°, and the maximum angle the door can open is less than or equal to α1 + α2. For example, the central angle α2 corresponding to the arc can be 30°, 35°, 45°, 50°, or 65°, etc. For instance, the outer diameter of the second spool 121 is 14mm, and the maximum angle that the second spool 121 can rotate through in the track groove 132 is 45°.

[0070] Optionally, see Figure 12 The track groove 132 includes a first groove wall 1321 and a second groove wall 1322.

[0071] A first groove wall 1321 is disposed at one end of the track groove 132, and a second groove wall 1322 is disposed at the other end of the track groove. The second groove wall 1322 is used to contact the side wall of the second spool 121 to drive the second spool 121 to move in a first direction; the first groove wall 1321 is used to contact the side wall of the second spool 121 to drive the second spool 121 to move in a second direction.

[0072] Optionally, see Figure 11 The hinge groove 131 is connected to the track groove 132, and the hinge groove 131 and the track groove 132 form a gourd shape.

[0073] This arrangement facilitates the connection between the hinge track plate 13, the hinge plate 11, and the wire harness plate 12. Specifically, the first wire spool 111 is disposed in the hinge groove 131, enabling a rotatable connection between the hinge track plate 13 and the first wire spool 111. The first fixing member 122 of the hinge plate 11 is disposed between the hinge groove 131 and the first wire spool 111, and the second wire spool 121 of the hinge plate 11 is disposed in the track groove 132, enabling a rotatable connection between the second wire spool 121 and the first wire spool 111, while simultaneously restricting the movement range of the second wire spool 121 to the track groove 132.

[0074] Optionally, see Figure 11 The hinge track plate 13 also includes a fixing cylinder 133. The fixing cylinder 133 is disposed at the lower part of the hinge groove 131, and the outer diameter of the fixing cylinder 133 is larger than the inner diameter of the hinge groove 131, while the inner diameter of the fixing cylinder 133 is smaller than the inner diameter of the hinge groove 131.

[0075] The fixing cylinder 133 forms a stepped structure at the lower part of the hinge groove 131, which facilitates the installation of the first fixing member 122. In addition, by setting the fixing cylinder 133, the wire harness can be constrained, which can alleviate the wire tangling and wear caused by too many wires in the wire harness.

[0076] Optionally, see Figure 11 The hinge track plate 13 also includes a fixing plate 134. The fixing plate 134 is disposed on the side of the hinge track plate 13 and is disposed at the end away from the hinge groove 131.

[0077] The fixed plate 134 facilitates the fixed connection between the hinge track plate 13 and the door body.

[0078] Understandably, the door body is provided with a fixing groove, which is suitable for accommodating the fixing plate 134. By inserting the fixing plate 134 into the fixing groove, the hinge track plate 13 is fixedly connected to the door body.

[0079] The connection diagram of wire harness plate 12 and hinge track plate 13 is shown below. Figure 12 As shown, the track groove 132 rotates around the central axis of the first fixing member, and the second bobbin 121 rotates within the track groove 132 around the central axis of the first fixing member 122.

[0080] Optionally, the first spool 111, the first fixing member 122 and the hinge groove 131 are sequentially fitted from the inside to the outside. During the opening and closing of the door, the first fixing member 122 rotates around the first spool 111, and the second spool 121 moves in the track groove 132 with the first spool 111 as the center of rotation.

[0081] With this configuration, the door can open to a larger angle, while the second reel 121 only needs to rotate a smaller angle. Therefore, the pulling force on the wire harness passing through the second reel 121 is reduced when the door opens and closes, thus lessening the wear on the wire harness passing through the second reel 121.

[0082] Optionally, see Figure 4 When the opening angle of the door is greater than or equal to the first preset angle, the second spool 121 moves within the range jointly defined by the second groove wall 1322 and the first stop 114. (See also...) Figure 5When the opening angle of the door is less than or equal to the second preset angle, the second spool 121 moves within the range jointly defined by the first groove wall 1321 and the second stop 115. (See also...) Figure 6 When the opening angle of the door is less than the first preset angle and greater than the second preset angle, the second spool 121 moves within the range defined by the track groove 132.

[0083] This design allows the door to open at a larger angle (approximately α1 + α2), while the second reel 121 rotates at a smaller angle (approximately α1). Therefore, the pulling force exerted on the wire harness passing through the second reel 121 during door opening and closing is reduced, lessening wear on the wire harness. Furthermore, the addition of the second reel 121 provides more space for the wire harness when the door is relatively thin, preventing wear caused by partial wire harness exposure.

[0084] Secondly, embodiments of this disclosure provide a door-in-door refrigerator.

[0085] Combination Figure 13 and Figure 14 The door-in-door refrigerator provided in this embodiment includes a cabinet 2, a main door 3, a main door hinge 4, a secondary door 5, a secondary door hinge 6, and a wiring harness 7.

[0086] The enclosure 2 is provided with an opening and a control unit. A main door 3 is located within the enclosure and is used to close or open the opening; the main door is equipped with main door electrical components. A main door hinge 4 is used to rotatably connect the main door to the enclosure, wherein the main door hinge 4 is the hinge assembly described in the first aspect. A secondary door 5 is located within the main door 3 and is equipped with secondary door electrical components. A secondary door hinge 6 is used to rotatably connect the secondary door to the main door. A wiring harness 7 includes a secondary door wiring harness 71 and a main door wiring harness 72. The secondary door wiring harness 71 is used to connect the secondary door electrical components to the control unit, and the main door wiring harness 72 is used to connect the main door electrical components to the control unit. The secondary door wiring harness 71 passes through the main door hinge 4 and the secondary door hinge 6, and the main door wiring harness 72 passes through the main door hinge 4.

[0087] The door-in-door refrigerator provided in this embodiment allows for a rotatable connection between the main door 3 and the cabinet 2 via the main door hinge 4. The main door hinge 4 is equipped with a first spool 111 and a second spool 121 to accommodate wire harnesses, providing more space for the wire harnesses 7 and preventing wear caused by partial exposure of the wire harness to the outside. Furthermore, the second spool 121 is located within a track groove 132 and can move within it. The main door 3 can open to a larger angle, while the second spool 121 rotates at a smaller angle. Therefore, the pulling force on the wire harness passing through the second spool 121 during the opening and closing of the main door is reduced, alleviating wear on the wire harness passing through the second spool 121.

[0088] Optionally, see Figure 14The secondary door wiring harness 71 passes through the secondary door hinge 6 from bottom to top, enters the main door 3 from the top of the secondary door hinge 6, then passes through the main door hinge 4 from bottom to top, and enters the housing 2 from the top of the main door hinge 4, connecting to the control unit. The main door wiring harness 72 passes through the main door hinge 4 from bottom to top, enters the housing 2 from the top of the main door hinge 4, and connects to the control unit.

[0089] This configuration facilitates the connection of the secondary door electrical components and control unit via the secondary door wiring harness 71, and facilitates the connection of the main door electrical components and control unit via the main door wiring harness 72.

[0090] Optionally, combined Figure 1 and Figure 2 The main door hinge 4 includes a hinge plate 11, a wire harness plate 12, and a hinge track plate 13.

[0091] A hinge plate 11 is disposed on the housing, and the hinge plate 11 is provided with a first spool 111 that can accommodate a wire harness. A wire harness plate 12 is provided with a second spool 121 that can accommodate a wire harness. A hinge track plate 13 is disposed on the main door 3, and the hinge track plate 13 is provided with a hinge groove 131 and a track groove 132. The hinge groove 131 is used to accommodate the first spool 111, and the track groove 132 is used to accommodate the second spool 121. The second spool 121 can move within the track groove 132.

[0092] The secondary door wiring harness 71 passes through the first wire reel 111 and / or the second wire reel 121 from bottom to top; the main door wiring harness 72 passes through the first wire reel 111 and / or the second wire reel 121 from bottom to top.

[0093] This arrangement facilitates the placement of the secondary door wiring harness 71 and the main door wiring harness 72. Furthermore, the second reel 121 is positioned within the track groove 132 and can move within it, allowing the main door 3 to open at a larger angle, while the second reel 121 rotates at a smaller angle. Therefore, the required length and deflection angle of the secondary door wiring harness 71 and / or the main door wiring harness 72 passing through the second reel 121 are smaller. Consequently, the pulling force exerted on the wiring harness passing through the second reel 121 during the opening and closing of the main door is less, reducing wear on the wiring harness passing through the second reel 121.

[0094] Optionally, the track groove 132 is set to be arc-shaped, and the second wire drum 121 deflects within the track groove 132 with the first wire drum 111 as the rotation center. The auxiliary door wiring harness 71 and the main door wiring harness 72 are provided with a reserved length L, which is used to prevent the main door 3 from pulling the auxiliary door wiring harness 71 and the main door wiring harness 72 when rotating.

[0095] By setting a reserved length L, the rotation of the main door 3 can effectively prevent the auxiliary door wiring harness 71 and the main door wiring harness 72 from being pulled, thus reducing the wear on the auxiliary door wiring harness 71 and the main door wiring harness 72.

[0096] Optionally, the reserved length L can be in the range of L≥πR*A / 360, where R is the distance between the axis of the first spool and the axis of the second spool, and A is the maximum deflection angle of the second spool.

[0097] This design effectively prevents the main door 3 from pulling on the auxiliary door wiring harness 71 and the main door wiring harness 72 when it rotates, thus reducing wear on the auxiliary door wiring harness 71 and the main door wiring harness 72.

[0098] Optionally, see Figure 15 The secondary door hinge 6 includes a hinge shaft 51 and a hinge base 52. At least one surface of the hinge shaft 51 is provided with one or more first communication connection ports 511. Each first communication connection port 511 is used to connect to the secondary door electrical components in the secondary door. The hinge base 52 is provided with a groove 521 adapted to accommodate the hinge shaft 51, and at least one inner wall of the groove 521 is provided with one or more second communication connection ports 522. The second communication connection ports 522 are used for electrical connection to terminals located on the outside of the hinge base 52, and each second communication connection port 522 corresponds one-to-one with a first communication connection port 511. Specifically, when the hinge shaft 51 is inserted into the groove 521, and the hinge shaft 51 and the hinge base 52 are relatively stationary and relatively rotating, each first communication connection port 511 connects to its corresponding second communication connection port 522 to achieve communication.

[0099] Optionally, the secondary gate harness 71 includes a first sub-harness and a second sub-harness.

[0100] The first sub-wiring harness is used to connect the first communication connection port 511 to the secondary door electrical component. The second sub-wiring harness is used to connect the second communication connection port 522 to the terminal located outside the hinge seat 52.

[0101] The first communication connection port 511 of the secondary door hinge 6 is connected to the secondary door electrical components via a first sub-wire harness. The second communication connection port 522 of the hinge base 52 is electrically connected to a terminal located on the outside of the hinge base 52 via a second sub-wire harness. By inserting the hinge shaft 51 into the groove 521 in the hinge base 52, the first communication connection port 511 and the second communication connection port 522 can be connected for communication, thereby realizing the electrical connection between the secondary door electrical components and the terminal during the opening and closing process of the secondary door 5. The terminal does not need to pass through the secondary door hinge 6, therefore the secondary door hinge provided in this embodiment can easily realize the connection between the terminal and the secondary door electrical components.

[0102] The hinge shaft 51 has one end fixedly connected to the refrigerator door and the other end rotatably connected to the hinge base 52. The refrigerator door can be rotatably fixed to the hinge base 52 via the hinge shaft 51.

[0103] Optionally, the shape of the hinge shaft 51 includes one or more of the following: cylinder, cone, frustum, stepped cylinder, stepped cone, and stepped frustum.

[0104] By setting the shape of the hinge shaft 51 to one or more of the following: cylinder, cone, frustum, stepped cylinder, stepped cone, and stepped frustum, it is easy to achieve a rotatable connection between the hinge shaft 51 and the hinge base 52. This facilitates a rotatable connection between the refrigerator door and the hinge base 52, making it easy to open or close the refrigerator door.

[0105] The shape of the hinge shaft 51 includes one of the following: cylinder, cone, frustum, stepped cylinder, stepped cone, and stepped frustum. In other words, the shape of the hinge shaft 51 can be a cylinder, cone, frustum, stepped cylinder, stepped cone, or stepped frustum.

[0106] The hinge shaft 51 can be shaped like a cylinder, a cone, a frustum, a stepped cylinder, a stepped cone, or a stepped frustum. In other words, the hinge shaft 51 can be any combination of two, three, or more of these shapes. For example, the hinge shaft 51 can be a combination of a cylinder and a frustum. The frustum is located on the upper end face of the cylinder, and both the cylinder and the frustum extend vertically with their centerlines coinciding.

[0107] At least one surface of the hinge shaft 51 is provided with one or more first communication connection ports 511. That is, one or more surfaces of the hinge shaft 51 are provided with first communication connection ports 511, and each surface may be provided with one or more first communication connection ports 511.

[0108] Optionally, combined Figure 16 and Figure 17 The hinge shaft 51 is shaped like a first-stepped cylinder. The first-stepped cylinder includes at least a first cylindrical surface 501, a second cylindrical surface 502, and a first stepped platform 503. The second cylindrical surface 502 is located below the first cylindrical surface 501, and the cross-section of the second cylindrical surface 502 is larger than the cross-section of the first cylindrical surface 501. The first stepped platform 503 connects the first cylindrical surface 501 and the second cylindrical surface 502. Each of the first cylindrical surface 501, the second cylindrical surface 502, and the first stepped platform 503 is provided with at least one first communication connection port 511.

[0109] Setting the hinge shaft 51 to a first-stepped cylindrical shape will not affect the opening or closing of the secondary door 5, while increasing the installation area of ​​the first communication connection port 511. The hinge shaft 51 can be provided with one or more steps, which can provide a sufficient number of first communication connection ports 511 even when there are many electrical components in the secondary door.

[0110] Understandably, the height of the first cylindrical surface 501 and the widths of the second cylindrical surface 502 and the first truncate surface 503 are all adjustable. Here, the width of the first truncate surface 503 refers to the difference between the radius of the cylinder corresponding to the first cylindrical surface 501 and the radius of the cylinder corresponding to the second cylindrical surface 502.

[0111] Optionally, see Figure 16 The first stepped cylinder also includes a first end face 504. The first cylindrical face 501, the second cylindrical face 502, the first step face 503, and the first end face 504 together form the first stepped cylinder.

[0112] Further, see Figure 16 Each of the first cylindrical surface 501, the second cylindrical surface 502, the first ladder surface 503, and the first end face 504 is provided with a first communication connection port 511.

[0113] Optionally, each first communication connection port 511 is arc-shaped or annular and embedded in the surface of the hinge shaft 51, with the surface of each first communication connection port 511 being flush with the surface of the hinge shaft 51 to which it is located. Correspondingly, each second communication connection port 522 located in the hinge seat 52 is arc-shaped or annular and embedded in the inner wall of the groove 521, with the surface of each second communication connection port 522 being flush with the inner wall of the groove 521 to which it is located.

[0114] By setting the first communication connection port 511 and the corresponding second communication connection port 522 to be arc-shaped or annular, the connection between the first communication connection port 511 and the corresponding second communication connection port 522 can still be ensured when the hinge shaft 51 rotates relative to the hinge seat 52. This setting avoids signal interruption due to the opening or closing of the refrigerator sub-door 5. By setting the surface of the first communication connection port 511 to be flush with the surface of the hinge shaft 51, and setting the surface of the second communication connection port 522 to be flush with the inner wall of the groove 521, it is easy for the hinge shaft 51 to be inserted into the hinge seat 52. This facilitates the connection between the first communication connection port 511 and the corresponding second communication port 522, enabling communication.

[0115] Understandably, the length of the arc can be adjusted according to the rotation angle of the secondary door 5 when it is opened or closed.

[0116] Optionally, see Figure 17 The hinge shaft 51 has a first receiving cavity 512 inside, which is in the shape of an inverted step.

[0117] By providing a first receiving cavity 512 in the shape of an inverted step inside the hinge shaft 51, it is convenient to electrically connect the secondary door electrical component to the first communication connection port 511. Specifically, one end of the first sub-wire harness is connected to the secondary door electrical component, and the other end of the first sub-wire harness enters the first receiving cavity 512, and then passes through the inner wall of the hinge shaft 51 to connect to the first communication connection port 511 of the hinge shaft 51.

[0118] Each of the first communication connection ports 511 is electrically connected to one or more electrical connection ports.

[0119] Optionally, see Figure 2 and Figure 3 The hinge shaft 51 is also provided with a positioning element 505. The positioning element 505 is arc-shaped or ring-shaped and is provided on the surface of the hinge shaft 51.

[0120] The positioning element 505 facilitates the positioning between the hinge shaft 51 and the secondary door 5. It is understood that the secondary door 5 has a positioning groove, and the outer diameter of the positioning element 505 is larger than the inner diameter of the positioning groove. One end of the hinge shaft 51 is adapted to enter the positioning groove. When a portion of the hinge shaft 51 enters the positioning groove, the positioning element 505 contacts the secondary door 5. Because the outer diameter of the positioning element 505 is larger than the inner diameter of the positioning groove, it restricts the hinge shaft 51 from further entering the positioning groove, thus achieving the positioning between the hinge shaft 51 and the secondary door 5.

[0121] Optionally, the material of the first communication connection port 511 may include aluminum or copper.

[0122] Both aluminum and copper have excellent electrical conductivity. By setting the material of the first communication connection port 511 to aluminum or copper, it can be connected to the second communication connection port 522 to achieve signal transmission.

[0123] Optionally, the hinge shaft 51 is made of polyoxymethylene.

[0124] Polyoxymethylene (POM) possesses advantages such as high strength, light weight, high hardness, high modulus, strong impact resistance, self-lubricating properties during dynamic friction, noiselessness, high fatigue strength, good creep resistance, small dielectric loss tangent, and high breakdown voltage. By using POM as the material for the hinge shaft 51, it achieves advantages such as durability, wear resistance, and low noise when opening and closing the door.

[0125] The hinge base 52 has one end rotatably connected to the hinge shaft 51, and the other end is fixedly connected to the refrigerator main door via the second sub-wiring harness. The hinge base 52 can rotatably fix the hinge shaft 51 to the refrigerator main door.

[0126] The hinge seat 52 is provided with a groove 521, which is suitable for accommodating the hinge shaft 51.

[0127] Optionally, the shape of the space defined by the groove 521 includes one or more of the following: cylinder, cone, frustum, stepped cylinder, stepped cone, and stepped frustum.

[0128] It is understandable that the shape of the space defined by the groove 521 is the same as the shape of the hinge shaft 51. This facilitates the hinge shaft 51 entering the groove 521, enabling a rotatable connection between the hinge shaft 51 and the hinge seat 52.

[0129] Optionally, at least one inner wall of the groove 521 is provided with one or more second communication connection ports 522. That is, one or more inner walls of the groove 521 are provided with second communication connection ports 522, and each inner wall may be provided with one or more second communication connection ports 522.

[0130] Optionally, see Figure 17 The space defined by the groove 521 is shaped like a second-stepped cylinder. The second-stepped cylinder includes at least a first cylindrical inner wall 5211, a second cylindrical inner wall 5212, and a first tiered inner wall 5213. The second cylindrical inner wall 5212 is located below the first cylindrical inner wall 5211, and the cross-section of the second cylindrical inner wall 5212 is larger than the cross-section of the first cylindrical inner wall 5211. The first tiered inner wall 5213 connects the first cylindrical inner wall 5211 and the second cylindrical inner wall 5212. Each of the first cylindrical inner wall 5211, the second cylindrical inner wall 5212, and the first tiered inner wall 5213 is provided with at least one second communication connection port 522.

[0131] This configuration facilitates the insertion of the hinge shaft 51 into the groove 521, and ensures that each first communication connection port 511 is connected to the corresponding second communication connection port 522 to achieve communication when the hinge shaft 51 and the hinge seat 52 are relatively stationary or rotating relative to each other.

[0132] Optionally, each second communication port 522 is annular and embedded in the inner wall of the groove 521, and the surface of each second communication port 522 is flush with the inner wall of the groove 521 in which it is located. Correspondingly, each first communication port 511 is annular and embedded in the surface of the hinge shaft 51, and the surface of each first communication port 511 is flush with the surface of the hinge shaft 51 in which it is located.

[0133] This configuration facilitates the insertion of the hinge shaft 51 into the hinge seat 52, enabling communication between the first communication connection port 511 and the corresponding second communication connection port 522. Furthermore, even when the hinge shaft 51 rotates relative to the hinge seat 52, the connection between the first communication connection port 511 and the corresponding second communication connection port 522 remains intact.

[0134] Optionally, see Figure 18The hinge base 52 includes a fixing part 523 and a first connecting part 524.

[0135] The fixing part 523 extends horizontally. A first connecting part 524 is disposed at one end of the fixing part 523, and the extending direction of the first connecting part 524 is perpendicular to the extending direction of the fixing part 523. A groove 521 is disposed in the first connecting part 524.

[0136] The fixing part 523 facilitates a fixed connection with the main door. The first connecting part 524 facilitates a rotatable connection with the hinge shaft 51. The hinge seat 52 enables a rotatable connection between the hinge shaft 51 and the main door, thereby enabling a rotatable connection between the secondary door and the main door.

[0137] Optionally, see Figure 19 The fixing part 523 has a second receiving cavity 5231 inside, which communicates with the outside. The wire connected to the second communication connection port 522 passes through the second receiving cavity 5231 and connects to the terminal located outside the hinge seat 52.

[0138] The second receiving cavity 5231 is provided to facilitate the electrical connection of the second communication connection port 522 to the terminal located outside the hinge seat 52. Specifically, one end of the second sub-wire harness is connected to the second communication connection port 522, and the other end of the second sub-wire harness passes through the second receiving cavity 5231 and is electrically connected to the terminal located outside the hinge seat 52.

[0139] Optionally, see Figure 19 The fixing part 523 is further provided with one or more third receiving cavities 5232, each of which is connected to the second receiving cavity 5231. By providing the third receiving cavity 5232, it is convenient for the second sub-wire harness to enter the second receiving cavity 5231.

[0140] Optionally, the material of the second communication connection port 522 may include aluminum or copper.

[0141] Both aluminum and copper have excellent electrical conductivity. By setting the material of the second communication connection port 522 to aluminum or copper, it can be connected to the first communication connection port 511 to achieve signal transmission.

[0142] Optionally, the hinge seat 52 is made of polyoxymethylene.

[0143] Polyoxymethylene (POM) possesses advantages such as high strength, light weight, high hardness, high modulus, strong impact resistance, self-lubricating properties during dynamic friction, noiselessness, high fatigue strength, good creep resistance, small dielectric loss tangent, and high breakdown voltage. By setting the material of the hinge shaft 51 to POM, the hinge seat 52 achieves advantages such as robustness, durability, wear resistance, and low noise when opening and closing the door.

[0144] Optionally, see Figure 20 The door-in-door refrigerator also includes a secondary door hinge box 8 and a main door hinge box 9.

[0145] The secondary door hinge box 8 is located above the main door 3 and is rotatably connected to the secondary door 5. The secondary door hinge box 8 covers the secondary door hinge 6. The main door hinge box 9 is located above the housing 2 and is rotatably connected to the housing 2. The main door hinge box 9 covers the main door hinge 4.

[0146] By using the secondary door hinge box 8 to cover the secondary door hinge 6, and using the main door hinge box 9 to cover the main door hinge 4, the appearance of the door-in-door refrigerator can be kept uniform. This arrangement avoids the secondary door hinge 6 and the main door hinge 4 being exposed, which would affect the overall effect of the door-in-door refrigerator.

[0147] Optionally, the secondary door wiring harness 71 enters the secondary door hinge box 8 from the upper part of the secondary door hinge 6, and enters the main door 3 from the lower part of the secondary door hinge box 8. Then, from the inside of the main door 3, it passes through the first wire reel 111 and / or the second wire reel 121 from bottom to top, and enters the main door hinge box 9 from the upper part of the main door hinge 4, and then enters the housing 2 from the lower part of the main door hinge box 9.

[0148] This design increases the space available for the wiring harness, preventing it from being exposed. It also facilitates wiring, maintains a uniform appearance for the door-in-door refrigerator, and enhances its overall aesthetic appeal.

[0149] Optionally, the main door wiring harness 72 passes from the inside of the main door 3, from bottom to top, through the first reel 111 and / or the second reel 121, and enters the main door hinge box 9 from the upper part of the main door hinge 4, and then enters the housing 2 from the lower part of the main door hinge box 9.

[0150] This design increases the space available for the wiring harness, preventing it from being exposed. It also facilitates wiring, maintains a uniform appearance for the door-in-door refrigerator, and enhances its overall aesthetic appeal.

[0151] The foregoing description and accompanying drawings fully illustrate 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. Individual components and functions are optional unless explicitly required, and the order of operation may vary. Parts and features of some embodiments may be included or substituted for parts and features of other embodiments. 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 its scope. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A door-in-door refrigerator, characterized in that, include: The enclosure is equipped with an opening and a control unit; The main door, located in the enclosure, is used to close or open the enclosure opening. The main door is equipped with main door electrical components. The main door hinge is used to rotatably connect the main door to the housing. A secondary door is provided on top of the main door, and the secondary door is equipped with secondary door electrical components; A secondary door hinge is used to rotatably connect the secondary door to the main door. The wiring harness includes a secondary door wiring harness and a main door wiring harness. The secondary door wiring harness is used to connect the secondary door electrical components to the control unit, and the main door wiring harness is used to connect the main door electrical components to the control unit. The secondary door wiring harness passes through both the main door hinge and the secondary door hinge, while the main door wiring harness passes through the main door hinge. The secondary door wiring harness passes through the secondary door hinge from bottom to top, enters the main door from the top of the secondary door hinge, then passes through the main door hinge from bottom to top, and enters the housing from the top of the main door hinge, connecting to the control unit; the main door wiring harness passes through the main door hinge from bottom to top, enters the housing from the top of the main door hinge, and connects to the control unit. The main door hinge includes: A hinge plate is disposed in the housing, and the hinge plate is provided with a first wire spool for accommodating wire harnesses; The wire harness plate is provided with a second spool for accommodating the wire harness; and, A hinge track plate is provided on the door body. The hinge track plate is provided with a hinge groove and a track groove. The hinge groove is used to accommodate the first spool and the track groove is used to accommodate the second spool. The second spool can move within the track groove. The secondary door wiring harness passes through the first and / or the second wire reel from bottom to top; the main door wiring harness passes through the first and / or the second wire reel from bottom to top.

2. The door-in-door refrigerator according to claim 1, characterized in that, The track groove is configured as a first arc shape, and the second bobbin deflects within the range of the first arc shape with the first bobbin as the rotation center. The secondary door wiring harness and the main door wiring harness are provided with a reserved length L, which is used to prevent the main door from pulling on the secondary door wiring harness and the main door wiring harness when it rotates.

3. The door-in-door refrigerator according to claim 2, characterized in that, The value range of the reserved length L is L≥πR*A / 360. Where R is the distance between the axis of the first spool and the axis of the second spool, and A is the maximum deflection angle of the second spool.

4. The door-in-door refrigerator according to claim 1, characterized in that, The secondary door hinge includes: The hinge shaft has one or more first communication connection ports on its surface; the first communication connection ports are connected to the electrical components of the secondary door; and, The hinge base has a groove adapted to accommodate the hinge shaft. The inner wall of the groove has one or more second communication connection ports. The second communication connection ports are electrically connected to terminals located on the outside of the hinge base, and the second communication connection ports correspond one-to-one with the first communication connection ports. Specifically, when the hinge shaft is inserted into the groove, and the hinge shaft and the hinge seat are relatively stationary and relatively rotating, each first communication connection port is connected to the corresponding second communication connection port to achieve communication.

5. The door-in-door refrigerator according to claim 4, characterized in that, The secondary gate wiring harness includes: The first sub-wiring harness is used to connect the first communication connection port and the secondary door electrical component; and, The second sub-wire harness is used to connect the second communication connection port to the terminal located on the outside of the hinge seat.

6. The door-in-door refrigerator according to claim 1, characterized in that, The door-in-door refrigerator also includes: A secondary door hinge box is disposed above the main door and is rotatably connected to the secondary door; the secondary door hinge box covers the secondary door hinge. The main door hinge box is located above the housing and is rotatably connected to the housing. The main door hinge box covers the main door hinge.

7. The door-in-door refrigerator according to claim 6, characterized in that, The secondary door wiring harness enters the secondary door hinge box from the upper part of the secondary door hinge, and enters the main door from the lower part of the secondary door hinge box. Then, from the inside of the main door, it passes through the first spool and / or the second spool from bottom to top, and enters the main door hinge box from the upper part of the main door hinge, and then enters the housing from the lower part of the main door hinge box.

8. The door-in-door refrigerator according to claim 6 or 7, characterized in that, The main door wiring harness passes from the inside of the main door, through the first and / or the second reel from bottom to top, and enters the main door hinge box from the upper part of the main door hinge, and then enters the housing from the lower part of the main door hinge box.

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