refrigerator

Abstract

This application discloses a refrigerator, including a cabinet and a door, the door being rotatably mounted on the cabinet. A hinge assembly connects the door to the cabinet, allowing the door to flip relative to the cabinet. A gravity-based self-closing structure includes a rolling part and a fixing member. The fixing member includes a guide part, which cooperates with the rolling part to allow the door to move along the height direction of the cabinet under its own weight. The guide part includes a first inclined surface and a platform surface. When the rolling part abuts against the platform surface, the door opens the receiving cavity, and the door's gravitational potential energy reaches its maximum. When the rolling part is located at the second end of the first inclined surface, the door, through its own weight, drives the rolling part to roll along the first inclined surface toward the first end closer to the first inclined surface, and the angle of the door's flip relative to the cabinet gradually decreases. Through the rolling friction between the rolling part and the guide part, the frictional resistance between them is effectively reduced, ensuring that the door obtains sufficient self-closing force under the action of the gravity component, thus increasing the gravity-based self-closing effect.

Description

Technical Field

[0001] This utility model relates to the field of refrigerator technology, and in particular to a refrigerator. Background Technology

[0002] In modern home decoration, refrigerators are becoming a new market favorite because they can blend seamlessly with cabinetry, enhancing the overall aesthetics and ambiance of the space. At the same time, the increasing demand for storage space from consumers is driving the continuous increase in refrigerator capacity. This trend has led to the emergence of large-capacity refrigerators, which not only offer more storage space but also better meet users' pursuit of home aesthetics.

[0003] However, as refrigerator doors become longer and heavier, in order to ensure a tight seal between the door and the refrigerator body when the door is closed, a gravity-operated self-closing structure is designed. This structure utilizes the door's own weight to make the door tend to close automatically in the final stage of closing, thus keeping the door close to the refrigerator body and sealing the refrigerator body.

[0004] However, existing technologies typically use flexible hook door closers. But when the freezer compartment generates negative pressure, the resulting door closing force is significantly insufficient, making it difficult for the refrigerator door to close automatically. This not only affects the user experience but may also cause cold air leakage due to the door not closing properly, increasing energy consumption and affecting food preservation, resulting in the door not effectively sealing the refrigerator. In view of this, this application is made. Utility Model Content

[0005] This utility model aims to at least partially solve one of the technical problems in the related art.

[0006] Therefore, according to embodiments of this disclosure, in a first aspect, a refrigerator is provided, comprising: A housing that defines multiple cavities; the height of the housing extends from its top to its bottom. A door, which is rotatably mounted on the housing to close or open the receiving cavity; A hinge assembly connects the door to the housing so that the door can be rotated relative to the housing; A gravity-operated self-closing structure is located on the lower side of the door; the gravity-operated self-closing structure includes: A rolling part, which is rotatably connected to the lower end of the door body; A fastener, which is connected to the hinge assembly; the fastener includes: A fixing plate, which is connected to the hinge assembly; A guide portion, which cooperates with the rolling portion to allow the door to move along the height direction of the housing under its own weight; the guide portion includes: A first inclined surface, the first end of which is connected to a first portion of the fixing plate; the second end of which is away from the fixing member relative to the first end of the first inclined surface. The platform surface has a first end connected to the second end of the first inclined surface, the second end of the platform surface extends in a direction away from the second end of the first inclined surface, and the platform surface is parallel to the upper surface of the fixed plate. When the rolling part abuts against the platform surface, the door opens the receiving cavity and the gravitational potential energy of the door reaches its maximum. When the rolling part rolls from the second end of the platform surface toward the first end of the platform surface, the angle of the door relative to the box gradually decreases. When the rolling part is located at the second end of the first inclined surface, the door body drives the rolling part to roll along the first inclined surface toward the first end closer to the first inclined surface by its own gravity, and the angle of the door body relative to the box body gradually decreases.

[0007] In the above technical solution, the gravity self-closing structure is driven to close by the door's own weight. When the door is not fully closed, the rolling part slides downward along the first inclined surface, and the door automatically rotates in the closing direction under the action of the gravity component. Through the rolling friction between the rolling part and the guide part, the frictional resistance between them is effectively reduced, increasing the gravity self-closing effect. This ensures that the door obtains sufficient self-closing force under the action of the gravity component, reliably overcoming the negative pressure of the freezer compartment to achieve a tight seal; at the same time, it avoids the angle being too small, which would cause a surge in resistance to be overcome when opening the door, ensuring that the user can open the door with less effort. While ensuring reliable self-closing, it also takes into account the convenience of opening the door.

[0008] In some embodiments of this application, the rolling part includes a roller; A mounting part is provided at the lower end of the door body, and an installation space is provided in the mounting part. The roller is at least partially accommodated in the installation space, and the roller is rotatably connected to the mounting part.

[0009] In the above technical solution, the mounting part provides an independent mounting space for the roller component, so that the roller component is at least partially accommodated therein. This can effectively limit the lateral displacement or detachment of the roller component during movement, and effectively ensure that the roller and the guide part can maintain a stable fit when the door is frequently opened and closed or subjected to vibration, thus avoiding door shaking or jamming caused by loose rollers.

[0010] In some embodiments of this application, along the height direction of the housing, the mounting portion extends from one end near the door to one end near the fastener; The surface of the mounting part near the end of the fixing member is defined as the first plane, and the first plane is parallel to the platform surface.

[0011] In the above technical solution, the end face of the mounting part near the fixed plate is set parallel to the surface of the platform, which can adapt to the rotation trajectory of the door body around the hinge axis. This can ensure a stable surface contact between the rolling part and the platform surface, avoid uneven force caused by the tilt of the contact surface, reduce the sliding or offset of the rolling part on the platform surface, and keep the door body stable in the open state.

[0012] In some embodiments of this application, along the height direction of the housing, the mounting portion extends from one end near the door to one end near the fixing plate; The surface of the mounting portion near the end of the fastener is defined as the first plane, and the surface of the first inclined surface is defined as the second plane, with the first plane being parallel to the second plane.

[0013] In the above technical solution, the core function of the first inclined surface is to drive the door to close automatically through the component of gravity, while the function of the platform surface is to stably support the door in the open state. By setting the surface of the mounting part near the fixed plate parallel to the surface of the first inclined surface, the rolling part can be restricted from leaving the platform surface, preventing the door from opening excessively, avoiding interference between the door and surrounding furniture, and adapting to the spatial constraints of the installation scenario.

[0014] In some embodiments of this application, the platform surface forms a first projection within a cross-section perpendicular to the height of the housing; The central angle corresponding to the arc of the first projection is , ,in, The maximum angle at which the door body rotates relative to the box body.

[0015] In the above technical solution, the platform surface provides stable support when the door is opened to a certain angle, preventing the door from closing automatically. When the user controls the door opening angle to... When the door is within the specified angle, the rollers remain in contact with the platform surface, allowing the door to remain stably at that angle. It will not automatically close due to gravity or the self-closing mechanism, perfectly adapting to the user's commonly used angles in daily operation.

[0016] In some embodiments of this application, the guide portion further includes a second inclined surface; The first end of the second inclined surface is connected to the second part of the fastener; the second end of the second inclined surface is away from the fastener relative to the first end of the second inclined surface; the second end of the platform surface is connected to the fastener through the second inclined surface.

[0017] In the above technical solution, the core function of the first inclined surface is to drive the door to close automatically through the component of gravity, the function of the platform surface is to stably support the door in the open state, and the second inclined surface is set to correspond to the trajectory of the door opening to a larger angle, which makes it easier for users to store items. When the rolling part is located on the second inclined surface, it can prevent the door from closing automatically, so that the door can run smoothly at different opening angles, improving the smoothness and reliability of the door opening and closing.

[0018] In some embodiments of this application, the platform surface forms a second projection within a cross-section perpendicular to the height of the housing; The central angle corresponding to the arc of the second projection The range is .

[0019] In the above technical solution, the platform surface is the support area for the rolling part when the door is in the open state, and its central angle range directly determines the angle range in which the door can be stably stopped. (Central angle...) The range is The angle range can accommodate the user's common door opening angle for picking up and putting down food, ensuring that the door will not accidentally slide due to slight external force within this range, thus improving the convenience of operation.

[0020] In some embodiments of this application, the second inclined surface forms a third projection within a cross-section perpendicular to the height of the housing; The central angle corresponding to the arc of the third projection The range is .

[0021] In the above technical solution, when When the angle is between 10° and 30°, the arc length of the second inclined surface is moderate, providing sufficient contact support range for the roller. Ensuring that the rolling part remains in contact with the surface before leaving the second inclined surface prevents the rolling part from falling off the ground.

[0022] In some embodiments of this application, at least two guide portions are provided, and the multiple guide portions are distributed circumferentially along the fastener, and the multiple guide portions are centrally symmetrically distributed; The gravity self-closing structure also includes a retainer located at the lower end of the door body; the number of rolling parts is provided in multiples, and the multiple rolling parts are distributed circumferentially along the retainer, the multiple rolling parts are centrally symmetrically distributed, and the multiple rolling parts correspond one-to-one with the multiple guide parts.

[0023] In the above technical solution, multiple guide parts are symmetrically distributed around the circumferential center of the fixing component, and multiple rolling parts correspond one-to-one with the guide parts and are also centrally symmetrical. This ensures that the force points are evenly distributed along the circumferential direction below the door during rotation or self-closing. This avoids wear or deformation of individual force points due to excessive load, reduces problems such as door tilting and jamming, and extends the service life of the hinge assembly.

[0024] According to a first aspect of the embodiments of this disclosure, a refrigerator is also provided, comprising: A housing that defines multiple cavities; the height of the housing extends from its top to its bottom. A door, which is rotatably mounted on the housing to close or open the receiving cavity; A hinge assembly connects the door to the housing so that the door can be rotated relative to the housing; A gravity-operated self-closing structure is located on the lower side of the door; the gravity-operated self-closing structure includes: A rolling part, which is rotatably connected to the lower end of the door body; A fastener, which is connected to the hinge assembly; the fastener includes: A fixing plate, which is connected to the hinge assembly; A guide portion, which cooperates with the rolling portion to allow the door to move along the height direction of the housing under its own weight; the guide portion includes: A first inclined surface, the first end of which is connected to a first portion of the fixed plate; the second end of which is away from the fixed plate relative to the first end of the first inclined surface. The platform surface has a first end connected to the second end of the first inclined surface, the second end of the platform surface extends in a direction away from the second end of the first inclined surface, and the platform surface is parallel to the upper surface of the fixed plate. In a cross-section perpendicular to the height of the housing, the first inclined surface forms a fourth projection within the cross-section, and the central angle corresponding to the arc of the fourth projection is... The range is

[0025] In a cross-section parallel to the height of the housing, the projection of the platform surface within the cross-section is defined as a first straight line, and the projection of the upper surface of the fixing plate within the cross-section is defined as a second straight line. The distance between the first straight line and the second straight line is... , ; When the rolling part abuts against the platform surface, the door opens the receiving cavity, and the gravitational potential energy of the door reaches its maximum. As the rolling part rolls from the second end of the platform surface toward the first end of the platform surface, the closer the rolling part is to the second end of the platform surface, the smaller the angle at which the door body flips relative to the box body gradually becomes; When the rolling part is located at the second end of the first inclined surface, the door body drives the rolling part to roll along the first inclined surface toward the first end closer to the first inclined surface by its own weight, and the angle of the door body relative to the box body gradually decreases.

[0026] In the above technical solution, when the central angle corresponding to the arc length of the first inclined surface... If the angle is too small, the slope of the first inclined surface will be too large, resulting in an excessive gravitational force that the door needs to overcome when opening, increasing the effort required for the user to open the door. When the central angle corresponding to the arc length of the first inclined surface... If the angle is too large, resulting in a small slope of the first inclined surface, the gravitational component will be insufficient, which may lead to slow self-closing or incomplete closure. The range is set to Simultaneously, the platform surface is at least 3mm higher than the fixing component, providing a clear potential energy difference starting point for the rolling part to transition from the platform surface to the first inclined surface. When the roller leaves the platform surface and enters the first inclined surface, the 3mm height difference will form an initial gravitational component force. Combined with the first inclined surface, this ensures that the door receives sufficient driving force as soon as it starts to close, increasing the gravity self-closing effect. This ensures that the door receives sufficient self-closing force under the action of the gravity component force, reliably overcoming the negative pressure in the freezer compartment to achieve a tight seal. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the structure of a refrigerator according to an embodiment of this application; Figure 2 yes Figure 1 A magnified structural diagram of A in the middle; Figure 3 This is a front view schematic diagram of a hinge assembly according to an embodiment of this application; Figure 4 This is an exploded structural diagram of a hinge assembly according to an embodiment of this application; Figure 5 This is a cross-sectional view of a hinge assembly according to an embodiment of this application; Figure 6This is a schematic diagram of the first state structure of a hinge assembly according to an embodiment of this application; Figure 7 This is a schematic diagram of the second state structure of a hinge assembly according to an embodiment of this application; Figure 8 This is a schematic diagram of the structure of the retainer and the rolling part according to an embodiment of this application; Figure 9 This is a schematic diagram of the structure of the retainer and the rolling part according to another embodiment of this application; Figure 10 This is a schematic diagram of the structure of the fixing part according to an embodiment of this application; Figure 11 This is a top view of the fixing part according to an embodiment of this application.

[0029] The annotations in the attached figures are explained as follows: Box body 100; door body 200; hinge assembly 300; first hinge component 310; hinge plate 311; first plate portion 3111; second plate portion 3112; third plate portion 3113; hinge shaft 320; limiting plate 321; thread 323; second hinge component 330; limiting groove 331; support plate 332; gravity self-closing structure 340; retaining component 341; retaining plate 3411; mounting part 342; first plane 3421; third plane 3422; second through hole 3410; fixing component 343; guide part 3431; first inclined surface 3401; second inclined surface 3402; platform surface 3403; fixing plate 3432; first through hole 3404; rolling part 345; connecting plate 350; pad 400; roller 500; mounting hole 501. Detailed Implementation

[0030] Typical embodiments embodying the features and advantages of this utility model will be described in detail in the following description. It should be understood that this utility model can have various variations in different embodiments, all of which do not depart from the scope of this utility model, and the descriptions and illustrations therein are for illustrative purposes only and not intended to limit this utility model.

[0031] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0032] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0033] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0034] This application discloses a refrigerator, as shown in the appendix below. Figures 1-11 Describe the refrigerator.

[0035] This application provides a refrigerator, as shown in the embodiments below. Figure 1 Figure 11 The refrigerator includes a cabinet 100 having a receiving cavity, a door 200 connected to the cabinet 100 for opening and closing the receiving cavity, and a refrigeration device for supplying cold air to the receiving cavity. The cabinet 100 includes an inner liner defining the receiving cavity, an outer shell connected to the outside of the inner liner to form the appearance of the refrigerator, and a heat insulation layer disposed between the inner liner and the outer shell to insulate the receiving cavity.

[0036] Among them, see Figure 1 The direction from the bottom wall to the top wall of the enclosure 100 is the height direction. The enclosure 100 may have a front wall and a rear wall arranged opposite each other. The side of the enclosure 100 facing the user may be the front wall of the main body. The direction in which the line of intersection of the top wall and the rear wall of the enclosure 100 extends is the width direction.

[0037] In this embodiment, the cabinet 100 may define multiple receiving cavities. Each receiving cavity has a retrieval opening at its front end for placing or removing items, allowing the user to insert or remove food from the cavity. The cabinet 100 is provided with a rotatable door 200 to open or close the retrieval openings of the receiving cavities. For example, the door 200 is rotatably connected to the cabinet 100 by hinge assemblies 300 located at the upper and lower parts of the refrigerator.

[0038] In some embodiments of this application, the multiple cavities may include a refrigerator compartment and a freezer compartment.

[0039] In some embodiments of this application, the refrigerator compartment and the freezer compartment are distributed along the width direction of the refrigerator. The refrigerator compartment extends along the height direction of the cabinet 100. The freezer compartment extends along the height direction of the cabinet 100.

[0040] In some embodiments of this application, reference is made to Figure 1 The refrigerator body 100 can be equipped with two doors 200. The two doors 200 are a refrigerator door and a freezer door. The refrigerator door is used to open or close the refrigerator compartment, and the freezer door is used to open or close the freezer compartment. When the refrigerator door and the freezer door are closed at the same time, the front wall of the refrigerator door and the front wall of the freezer door together form the front wall of the refrigerator.

[0041] The refrigerator has two accommodating cavities along its width. The doors 200 of each cavity are large and heavy, making them prone to sagging. Adjusting the height of a sagging door 200 is difficult by manually lifting it.

[0042] The enclosure 100 includes a first sidewall (one of the left and right sidewalls of the enclosure 100) and a second sidewall (the other of the left and right sidewalls of the enclosure 100) disposed opposite each other along its width direction. A hinge assembly 300 is disposed on the enclosure 100 and close to the first sidewall to connect a door 200 close to the first sidewall to the enclosure 100, allowing the door 200 to rotate relative to the enclosure 100 to open or close.

[0043] In some embodiments of this application, a door seal is provided on the side wall of the door 200 near the housing 100. The door seal surrounds the access opening. When the door 200 is closed, the door seal adheres to the front face of the housing 100 to effectively seal the connection between the door 200 and the housing 100, thereby ensuring that the door 200 seals the access opening and preventing cold air from escaping.

[0044] In some embodiments of this application, the door 200 is rotatably connected to the housing 100 via an upper hinge assembly 300 and a lower hinge assembly 300.

[0045] In some embodiments of this application, reference is made to Figure 1 and Figure 2 The hinge assembly 300 includes a first hinge component 310 and a second hinge component 330, wherein the first hinge component 310 and the second hinge component 330 cooperate and can rotate relative to each other.

[0046] In some embodiments of this application, reference is made to Figure 2 and Figure 3The first hinge component 310 includes a hinge plate 311. The hinge plate 311 includes a first plate portion 3111 connected to the housing 100, a second plate portion 3112 extending forward from the first plate portion 3111, and a third plate portion 3113 connecting the first plate portion 3111 and the second plate portion 3112. The first plate portion 3111 is parallel to the bottom wall of the housing 100, and the third plate portion 3113 is inclined from one end near the first plate portion 3111 towards the end near the second plate portion 3112, gradually moving away from the first plate portion 3111. The first plate portion 3111 can be fastened to the bottom wall of the housing 100 using fasteners such as screws, pins, and bolts.

[0047] In some embodiments of this application, reference is made to Figure 4-7 A fixing hole can be provided on the second plate portion 3112 of the hinge plate 311, wherein the fixing hole corresponds to the position of the first through hole 3404. A limiting plate 321 can be provided on the outer surface of the hinge shaft 320, the diameter of the limiting plate 321 being larger than the diameter of the fixing hole. A thread 323 is provided on the hinge shaft 320 located below the limiting plate 321. After the hinge shaft 320 passes through the fixing hole, it can be fixed with a nut to fix the hinge shaft 320 to the hinge plate 311. The first through hole 3404 of the fixing plate 3432 passes through the hinge shaft 320 above the limiting plate 321. It can be understood that the limiting plate 321 is located between the hinge plate 311 and the fixing plate 3432. The material of the limiting plate 321 can be a metal with high hardness such as steel. The limiting plate 321 and the hinge shaft 320 can be an integrally formed structure or a separate structure connected by welding, bonding, or other methods.

[0048] In the above technical solution, the diameter of the limiting plate 321 is larger than that of the fixing hole. After the hinge shaft 320 passes through the fixing hole of the second plate 3112, the limiting plate 321 will abut against the upper surface of the hinge plate 311 to form an upward axial limit. The lower part is locked by the nut and the thread 323 of the hinge shaft 320 to form a downward axial limit. This ensures that the impact force when the door 200 is opened and closed will not cause the hinge shaft 320 to loosen or shift, thus ensuring the axial stability of the door 200 when it rotates and avoiding tilting or jamming of the door 200 due to shaft offset.

[0049] Specifically, for the hinge at the upper end of the door 200, the first plate portion 3111 is connected to the top wall of the housing 100. For the hinge at the lower end of the door 200, the first plate portion 3111 is connected to the lower bottom surface of the housing 100. The first hinge component 310 includes a hinge shaft 320 disposed on the second plate portion 3112. The hinge shaft 320 is perpendicular to the second plate portion 3112. The first end of the hinge shaft 320 is connected to the hinge plate 311.

[0050] The second hinge component 330 includes a limiting groove 331. The second end of the hinge shaft 320 is inserted into the limiting groove 331. It is understood that, referring to... Figure 1 Along the height direction of the housing 100, the upper end of the hinge shaft 320 is inserted into the limiting groove 331. When the door 200 is closing or opening, the hinge shaft 320 can slide within the limiting groove 331 along the height direction of the housing 100, thereby driving the door 200 to move relative to the housing 100 along the height direction of the housing 100 under the action of its gravity.

[0051] In some embodiments of this application, reference is made to Figure 3 and 4 The gravity-operated self-closing structure 340 may include a cooperating retainer 341, a rolling part 345, and a fixing part. The rolling part 345 is rotatably connected to the lower end of the door body 200. The retainer 341 may be fixedly disposed at the lower end of the limiting groove 331, and the rolling part 345 may be rotatably connected to the side of the retainer 341 away from the limiting groove 331. In other words, the rolling part 345 is mounted to the lower end of the door body 200 via the retainer. The fixing part may be fixedly disposed on the second plate portion 3112 of the hinge plate 311. The retainer 341 and the fixing part may be arranged along the height direction of the housing 100, with the rolling part 345 disposed between the retainer 341 and the fixing part.

[0052] The rolling part 345 can adopt a structure such as a cylindrical roller or a trapezoidal roller.

[0053] During the process of rotating the door 200 from the open state to the closed state, the door 200 can automatically move towards the box 100 through the gravity self-closing structure 340, so that the door 200 can automatically close, and the door 200 can abut against the box 100 when it is closed, reducing the gap between the door 200 and the box 100.

[0054] Reference Figures 2-7 The fastener includes a fixing plate 3432. Specifically, for the hinge assembly 300 located at the bottom of the refrigerator, the fixing plate 3432 is fixedly connected to the upper surface of the second plate portion 3112 of the hinge plate 311. A first through hole 3404 is provided on the fixing plate 3432, and the first end of the hinge shaft 320 passes through the first through hole 3404 and connects to the hinge plate 311. That is to say, in Figures 3-7 In the middle, the lower end of the hinge shaft 320 passes through the first through hole 3404 and is connected to the hinge plate 311.

[0055] The fastener also includes a guide portion 3431, which is located on the surface of the fixing plate 3432 facing the retainer 341. A rolling portion 345 is rollably connected to the outer surface of the guide portion 3431 so that the door 200 moves away from the top wall of the box 100 along the height direction of the box 100 under its own weight.

[0056] Reference Figure 10 The guide portion 3431 includes a first inclined surface 3401 and a platform surface 3403. A first end of the first inclined surface 3401 is connected to a first portion of the fixing plate 3432, and a second end of the first inclined surface 3401 is located away from the fixing member relative to the first end of the first inclined surface 3401. A first end of the platform surface 3403 is connected to the second end of the first inclined surface 3401, and the second end of the platform surface 3403 extends away from the second end of the first inclined surface 3401, creating a height difference between the platform surface 3403 and the first end of the first inclined surface 3401. The platform surface 3403 is parallel to the upper surface of the fixing plate 3432.

[0057] In some embodiments of this application, the first inclined surface 3401 and the platform surface 3403 are smoothly connected, and the platform surface 3403 and the fixing member can also be smoothly connected, so that the relative movement between the rolling part 345 and the guide part 3431 is smoother.

[0058] When the rolling part 345 abuts against the platform surface 3403, the door 200 opens the receiving cavity, and the gravitational potential energy of the door 200 reaches its maximum. When the rolling part 345 rolls from the second end of the platform surface 3403 toward the first end of the platform surface 3403, the angle of rotation of the door 200 relative to the box 100 gradually decreases. When the rolling part 345 is located at the second end of the first inclined surface 3401, the door 200 drives the rolling part 345 to roll along the first inclined surface 3401 toward the first end close to the first inclined surface 3401 by its own gravity. The angle of rotation of the door 200 relative to the box 100 gradually decreases, and finally the self-closing door 200 completely closes the receiving cavity.

[0059] For example, the guide portion 3431 and the rolling portion 345 have a 3° interference fit with the hinge shaft 320 as the rotation center. That is, there is a 3° angle difference between the contour design of the guide portion 3431 and the rolling portion 345. When the door 200 is fully closed, this interference fit keeps the rolling portion 345 on the first inclined surface 3401 and still guided by the first inclined surface 3401, continuously converting gravity into a preload force towards the housing 100. This avoids sealing failure caused by gaps after the door 200 is closed, and by precisely controlling the interference angle, ensures that the preload force is moderate and does not excessively increase the resistance when opening the door, thus balancing sealing reliability and ease of operation.

[0060] When the rolling part 345 rolls along the first inclined surface 3401 to its first end, the door 200 is in a state where the receiving cavity is completely closed. Due to the 3° angle difference between the guide part 3431 and the rolling part 345, the door 200 forms a negative angle relative to the cabinet 100. That is, the door 200 is further tilted towards the cabinet 100 from the closed position. In this state, the rolling part 345 still maintains contact with the first inclined surface 3401, and the weight of the door 200 itself generates a component force towards the cabinet 100 along the first inclined surface 3401. This component force continues to act on the door 200, making it tightly press against the cabinet 100. Combined with the door seal, this enhances the sealing performance, effectively counteracting the door loosening that may be caused by the negative pressure in the freezer compartment, and preventing cold air leakage.

[0061] Reference Figure 6 When the rolling part 345 is located on the side of the first inclined surface 3401 away from the platform surface 3403, the door 200 closes to seal the receiving cavity. (See reference...) Figure 7 When the rolling part 345 abuts against the platform surface 3403, it can be understood that when the rolling part 345 is above the platform surface 3403, the door 200 opens the receiving cavity, and the opening angle of the door 200 is about 15-25°.

[0062] When the door 200 closes from the open state, as the opening angle of the door 200 gradually decreases, the rolling part 345 gradually approaches the first inclined surface 3401. As the door 200 continues to close, the rolling part 345 cooperates with the first inclined surface 3401 of the guide part 3431, causing the distance between the platform surface 3403 and the lower surface of the retainer 341 to gradually decrease, and the distance between the lower surface of the retainer 341 and the upper surface of the fixing plate 3432 to gradually decrease. This, in turn, drives the door 200, which is fixedly connected to the retainer 341, to move towards the fixing plate 3432 (downward). During the above process, the gravitational potential energy of the door 200 gradually decreases, and its gravitational potential energy is converted into kinetic energy, causing the door 200 to move automatically downward, realizing the automatic closing of the door 200. The gravity self-closing structure 340 is driven to close by the gravity of the door 200 itself, and the door 200 automatically rotates in the closing direction under the action of the gravitational component.

[0063] The above technical solution specifies the specific arrangement of the guide part 3431 and the rolling part 345, which has a simple structure and is easy to form. The inclined surface makes the interaction between the rolling part 345 and the guide part 3431 smoother and more fluid. The rolling friction effectively reduces the frictional resistance between the two and increases the gravity self-closing effect. The gravity self-closing structure 340 is driven to close by the gravity of the door body 200 itself. When the door body 200 is not completely closed, the rolling part 345 slides downward along the first inclined surface 3401, and the door body 200 automatically rotates in the closing direction under the action of the gravity component.

[0064] In some embodiments of this application, reference is made to Figure 3-7 The rolling part 345 includes a roller component; a mounting part 342 is provided at the lower end of the door body 200, and a mounting space is provided within the mounting part 342. The roller component is at least partially accommodated within the mounting space, and the roller component is rotatably connected to the mounting part. The roller component can be a cylindrical roller, a trapezoidal roller, or other similar structure.

[0065] For example, refer to Figure 4 and Figure 8 and Figure 9 A retaining member 341 can be provided between the door body 200 and the mounting part 342. The mounting part 342 can be mounted on the retaining member 341, and the retaining member 341 is connected and fixed to the door body 200. The retaining member 341 includes a retaining plate 3411, which may have a second through hole 3410. The second end of the hinge shaft 320 passes through the second through hole 3410 and engages with the limiting groove 331. The upper surface of the retaining plate 3411 and the lower end of the limiting groove 331 can be fixedly connected by means of bonding, welding, or bolting.

[0066] Reference Figure 8 and Figure 9 On the side of the retaining plate 3411 away from the limiting groove 331, there is a mounting part 342 corresponding to the roller component. The mounting part 342 is provided with a mounting space, and the roller component is at least partially accommodated in the mounting space. The roller component is rotatably connected to the mounting part 342.

[0067] In the above technical solution, the mounting part 342 provides an independent mounting space for the roller component, so that the roller component is at least partially accommodated therein. This can effectively limit the lateral displacement or detachment of the roller component during movement, and effectively ensure that the roller 500 and the guide part 3431 can maintain a stable fit when the door 200 is frequently opened and closed or subjected to vibration. This avoids the door 200 shaking or jamming due to the loosening of the roller 500. The design of partially accommodating the roller component within the mounting space can reduce the space occupied by the components in the height direction, making the fit between the retaining plate 3411 and the fixing plate 3432 more compact. This is suitable for the strict space requirements of built-in refrigerators and avoids the impact of structural protrusion on the close fit between the refrigerator and the cabinet.

[0068] In some embodiments of this application, reference is made to Figure 8 Along the height of the housing 100, the mounting portion 342 extends from one end near the door 200 to the end near the fixing plate 3432. The surface of the mounting portion 342 near the fixing plate 3432 is defined as the first plane 3421, and the surface of the platform surface 3403 is defined as the second plane 3422. The first plane 3421 is parallel to the second plane 3422. It can be understood that the lower end surface of the mounting portion 342 is parallel to the platform surface 3403.

[0069] The mounting part 342 is positioned parallel to the platform surface 3403 at one end face near the fixing plate 3432. This allows it to adapt to the rotation trajectory of the door 200 around the hinge axis 320, ensuring a stable surface contact between the roller and the platform surface 3403. This avoids uneven force distribution caused by the tilt of the contact surface, reduces the sliding or offset of the roller 500 on the platform surface 3403, and keeps the door 200 stable in the open state. The platform surface 3403, as an intermediate transition section during the opening process of the door 200, maintains a parallel relationship with the lower end face of the mounting part 342. This ensures that the roller 500 maintains a stable direction of movement when sliding from the first inclined surface 3401 (door closed state) into the platform surface 3403. The second inclined surface 3402, as an extension section where the door 200 is opened to its maximum angle, allows the rolling part 345 to continue moving along the second inclined surface 3402, thereby maximizing the opening of the door 200 and facilitating the user's access to items.

[0070] In some embodiments of this application, reference is made to Figure 9 Along the height direction of the housing 100, the mounting part 342 extends from one end near the door 200 to one end near the fixing plate 3432; the surface where the end face of the mounting part 342 near the fixing plate 3432 is located is defined as the third plane 3422, and the surface where the first inclined surface 3401 is located is defined as the fourth plane, and the third plane 3422 is parallel to the fourth plane.

[0071] In the above technical solution, the core function of the first inclined surface 3401 is to drive the door 200 to close itself using the component of gravity. The function of the platform surface 3403 is to stably support the door 200 in the open state, while the second inclined surface 3402 is used to correspond to the trajectory of the door 200 opening to a larger angle. By setting the end face of the mounting part 342 near the fixed plate 3432 parallel to the surface of the first inclined surface 3401, the rolling part 345 can be prevented from entering the second inclined surface 3402, preventing the door 200 from opening excessively. This is more suitable for the space constraints of embedded scenarios, avoids interference between the door 200 and surrounding furniture, and adapts to the space constraints of embedded scenarios.

[0072] In some embodiments of this application, reference is made to Figure 11 Within a cross-section perpendicular to the height of the box 100, the platform surface 3403 forms a first projection within its cross-section; the central angle corresponding to the arc of the first projection is... , ,in, This represents the maximum angle at which the door 200 rotates relative to the housing 100. It can be understood that when the door 200 rotates relative to the housing 100, the rolling part 345 rotates around the hinge axis 320, following an arc-shaped trajectory. Therefore, the trajectory on the platform surface 3403 is an arc, and the arc extends in the same direction as the platform surface 3403. Thus, the central angle corresponding to this arc is... That is, the central angle corresponding to the arc length of platform surface 3403. .

[0073] In some embodiments, the maximum angle at which the door 200 rotates relative to the housing 100 is 14°, and the central angle corresponding to the arc length of the platform surface 3403 is set at... This arrangement ensures that the rollers remain on the platform surface 3403 during the opening process of the door 200. The platform surface 3403 provides stable support when the door 200 is opened to a certain angle, preventing the door 200 from closing automatically. When the user controls the opening angle of the door 200 to within a certain range... When the door is within the specified angle, the roller 500 remains in contact with the platform surface 3403, and the door 200 can remain stably at this angle. It will not automatically close due to gravity or the self-closing mechanism, and it is fully compatible with the commonly used angles for daily operation.

[0074] like If the size is too large, the roller components may fail to reach their maximum angle before the door body 200 reaches its maximum angle due to the excessive length of the platform surface 3403, making it impossible to install multiple guide sections 3431, thus affecting the stability of the door body 200; if If the size is too small, the commonly used angles covered by the platform surface 3403 will be insufficient, which will cause the door 200 to enter the automatic closing state prematurely before reaching a large opening angle, affecting the convenience of use.

[0075] In some embodiments of this application, reference is made to Figure 10 The guide portion 3431 may also include a second inclined surface 3402; the first end of the second inclined surface 3402 is connected to the second part of the fixing member 343; the second end of the second inclined surface 3402 is away from the fixing member 343 relative to the first end of the second inclined surface 3402; the second end of the platform surface 3403 is connected to the fixing member 343 through the second inclined surface 3402.

[0076] In other embodiments of this application, the rolling part 345 may also be located on the side of the second inclined surface 3402 away from the platform surface 3403. When the rolling part 345 is located on the side of the second inclined surface 3402 away from the platform surface 3403, the door 200 opens the receiving cavity, and the opening angle of the door 200 is between 90° and 140°.

[0077] The core function of the first inclined surface 3401 is to drive the door 200 to close automatically through the component of gravity. The function of the platform surface 3403 is to stably support the door 200 in the open state. The second inclined surface 3402 is set to correspond to the trajectory of the door 200 opening to a larger angle, which is convenient for users to store items. When the rolling part 345 is located on the second inclined surface 3402, it can prevent the door 200 from closing automatically, so that the door 200 can run smoothly at different opening angles, improving the smoothness and reliability of the door 200 opening and closing.

[0078] In some embodiments of this application, reference is made to Figure 11 Within a cross-section perpendicular to the height of the box 100, the platform surface 3403 forms a second projection within its cross-section; the central angle corresponding to the arc of the second projection. The range is It is understandable that when the door 200 rotates relative to the housing 100, the rolling part 345 rotates around the hinge axis 320, and its trajectory is arc-shaped. Therefore, the trajectory on the platform surface 3403 is an arc, and the arc extends in the same direction as the platform surface 3403. Thus, the central angle corresponding to this arc is... That is, the central angle corresponding to the arc length of platform surface 3403. .

[0079] Platform surface 3403 serves as an intermediate transition section connecting the first inclined surface 3401 (door 200 in closed state) and the second inclined surface 3402 (door 200 in maximum open state) of the door 200. As the refrigerator door 200 opens from fully closed to its maximum opening, the rolling part 345 at the bottom of the door 200 slides from the first inclined surface 3401 into platform surface 3403. This causes the distance between the retaining plate 3411 and the fixed plate 3432 to gradually increase, thereby moving the door 200 away from the fixed plate 3432 (upwards). During this process, the door 200's own weight does negative work, and the gravitational potential energy of the door 200 gradually increases.

[0080] Platform surface 3403 has a planar structure, providing stable support for the rollers. Once the rollers enter platform surface 3403, the slope disappears. At this point, the force required for the user to push the door 200 does not need to overcome the climbing resistance of the inclined surface; it only needs to maintain the horizontal rotation tendency of the door 200. The buffering effect of platform surface 3403 makes the opening process smoother. When the rollers are located on platform surface 3403, the door 200 is in a semi-open state (not fully closed, nor at its maximum opening). This meets the user's daily needs for retrieving and placing items, while the length limitation of platform surface 3403 prevents the door 200 from being over-opened unnecessarily, saving space.

[0081] Platform surface 3403 is the support area for rollers 500 when door 200 is in the open state, and its central angle range directly determines the angle range in which door 200 can be stably stopped. (Central angle...) The range is The angle range can accommodate the user's common door opening angle for picking up and putting down food, ensuring that the door 200 will not accidentally slide due to slight external force within this range, thus improving the convenience of operation.

[0082] like When this happens, the area where the platform surface 3403 is located becomes too narrow, and the self-locking stability of the door 200 at commonly used angles decreases. Even a slight external force may cause it to slide out of this area, either suddenly closing and trapping the user or items, or suddenly opening wide and colliding with objects around the refrigerator.

[0083] In some embodiments of this application, reference is made to Figure 11 Within a cross-section perpendicular to the height of the box 100, the second inclined surface 3402 forms a third projection within its cross-section, and the central angle corresponding to the arc of the third projection... The range is It is understandable that when the door 200 rotates relative to the housing 100, the rolling part 345 rotates around the hinge axis 320, and its trajectory is arc-shaped. Therefore, the trajectory of the rolling part 345 on the second inclined surface 3402 is an arc, and the arc extends in the same direction as the second inclined surface 3402. Therefore, the central angle corresponding to this arc is... That is, the central angle corresponding to the arc length of the second inclined surface 3402. .

[0084] The second inclined surface 3402 corresponds to the door body 200 entering the maximum opening angle, when When the angle is between 10° and 30°, the arc length of the second inclined surface 3402 is moderate, providing sufficient contact support range for the roller. By ensuring that the rolling part 345 is always in contact with the surface before leaving the second inclined surface 3402, the rolling part 345 can be prevented from falling into the air, thus avoiding the impact caused by being suspended and ensuring the smoothness and quietness of the door body 200 movement.

[0085] like If the size is too small, the second inclined surface 3402 will be too short. When the door 200 moves, the roller may quickly detach from the contact surface, which may cause the roller to be suspended in the air for a moment. This will cause the door 200 to be suddenly subjected to gravity and generate an impact, resulting in shaking, abnormal noise, or even structural wear.

[0086] like If the size is too large, when the door 200 opens to the second inclined surface 3402, the arc of its rotation trajectory will change accordingly. As the door increases in size and length, its inertia also increases, making it prone to colliding with external objects due to excessive inertia.

[0087] In some embodiments of this application, reference is made to Figure 3-7 and Figure 11 The number of guide parts 3431 is at least two, and the multiple guide parts 3431 are distributed along the circumference of the fixing member and are centrally symmetrically distributed; the number of rolling parts is multiple, and the multiple rolling parts are distributed along the circumference of the retaining plate and are centrally symmetrically distributed, with each of the multiple rolling parts corresponding to one of the multiple guide parts 3431.

[0088] In this application, reference is made to Figure 3-7 and Figure 11 The guide portions 3431 are provided in at least two quantities, and the multiple guide portions 3431 are distributed circumferentially along the fixing plate 3432, and the multiple guide portions 3431 are centrally symmetrically distributed. In some embodiments of this application, refer to Figure 4 and Figure 11 There are two guide parts 3431, which are centrally symmetrically distributed.

[0089] The gravity self-closing structure 340 also includes a retainer 341 located at the lower end of the door body 200; multiple rolling parts 345 are provided, and the multiple rolling parts 345 are distributed circumferentially along the retainer plate 3411, and the multiple rolling parts 345 are centrally symmetrically distributed, with each of the multiple rolling parts 345 corresponding to a multiple guide parts 3431. In one embodiment of this application, two rolling parts 345 are provided, and one rolling part 345 acts on one guide part 3431.

[0090] In the above technical solution, multiple guide parts 3431 are symmetrically distributed around the center of the fixed plate 3432, and multiple rolling parts 345 correspond one-to-one with the guide parts 3431 and are also centrally symmetrical. This ensures that the force points of the door 200 are evenly distributed in the circumferential direction below the door 200 during rotation or self-closing. This avoids wear or deformation of individual force points due to excessive load, reduces problems such as tilting and jamming of the door 200, and extends the service life of the hinge assembly 300.

[0091] In some embodiments of this application, reference is made to, as shown in 3 and Figure 5The hinge assembly 300 also includes a connecting plate 350, which connects the second hinge component 330 to the door body 200. The connecting plate 350 has a fourth through hole that fits onto the outer surface of the limiting groove 331. The second hinge component 330 also includes a support plate 332. The limiting groove 331 is located on the upper surface of the support plate 332, and a retaining member 341 is located on the lower surface of the support plate 332. The support plate 332 has a third through hole that connects to the limiting groove 331. The connecting plate 350 and the support plate 332 can be connected by bolts, adhesive, or other methods.

[0092] The connecting plate 350 serves as an intermediate connecting member between the second hinge component 330 and the door body 200. It is fitted with the outer surface of the limiting groove 331 through the fourth through hole and is detachably connected to the support plate 332. This allows for flexible assembly of the second hinge component 330 and the door body 200, enhancing the versatility of the hinge assembly 300 and reducing the customization costs for different refrigerator models.

[0093] In some embodiments of this application, reference is made to Figures 1-7 A foot 400 may also be provided on the side of the hinge plate 311 away from the fixed plate 3432. The foot 400 is connected to the lower surface of the second plate portion 3112 of the hinge plate 311 by bolts. By adjusting the position of the foot 400 relative to the hinge plate 311 along the direction perpendicular to the hinge plate 311, the box 100 can be placed stably.

[0094] By adjusting the position of the feet 400 along the direction perpendicular to the hinge plate 311 (i.e., the height direction of the refrigerator), tilting caused by uneven ground can be compensated. Even if there is a slight slope or unevenness on the placement surface, the height of the feet 400 can be adjusted individually to ensure that the refrigerator body 100 stands stably, avoiding problems such as poor door sealing (cold air leakage), spillage of internal food, or shaking of the entire unit caused by tilting.

[0095] The pads 400 can be made of wear-resistant rubber or hard plastic, which can prevent the metal hinge plate 311 from directly contacting the ground and causing scratches. At the same time, it can buffer the local pressure of the weight of the box 100 on the ground and prevent the ground from deforming.

[0096] In some embodiments of this application, reference is made to Figures 1-7 The hinge plate 311 may also be provided with rollers 500 to facilitate moving the refrigerator. The first plate portion 3111 of the hinge plate 311 is provided with mounting holes 501, and the rollers 500 are at least partially installed in the mounting holes 501. That is, the rollers 500 are at least partially located on the side of the first plate portion 3111 away from the bottom wall of the cabinet 100.

[0097] By incorporating rollers 500, sliding friction is converted into rolling friction, significantly reducing pushing resistance. Users can easily adjust the position of the housing 100 without tools. The rolling part 345 is installed within the mounting hole 501 and located on the side of the first plate 3111 away from the bottom of the housing. This ensures support stability during rolling and prevents scratches caused by direct friction between the bottom of the housing and the ground during movement. It complements the function of the feet 400: during movement, the height of the feet 400 can be adjusted to allow the rollers 500 to contact the ground and bear weight; when stationary, the feet 400 can be lowered to support the ground, leaving the rollers 500 suspended, enabling quick switching between moving and stationary states while maintaining both flexibility and stability.

[0098] Secondly, a refrigerator is also provided, comprising: a cabinet 100 defining a plurality of accommodating cavities; the height direction of the cabinet 100 is from its top to its bottom; a door 200 rotatably disposed on the cabinet 100 to close or open the accommodating cavities; a hinge assembly 300 connecting the door 200 to the cabinet 100 so that the door 200 can be rotated relative to the cabinet 100; and a gravity self-closing structure 340 located on the lower side of the door 200; the gravity self-closing structure 340 includes: a rolling part 345 rotatably connected to the lower end of the door 200. A fixing member 343 is connected to the hinge assembly 300. The fixing member 343 includes: a fixing plate 3432 connected to the hinge assembly 300; a guide portion 3431 for cooperating with a rolling portion 345 to allow the door 200 to move along the height direction of the housing 100 under its own weight; the guide portion 345 includes: a first inclined surface 3401, the first end of which is connected to a first portion of the fixing plate 3432; the second end of which is away from the fixing plate 3432 relative to the first end of the first inclined surface 3401; and a platform surface 3403, the first end of which is connected to the second end of the first inclined surface 3401, the second end of which extends away from the second end of the first inclined surface 3401, so that a height difference is created between the platform surface 3403 and the first end of the first inclined surface 3401, and the platform surface 3403 is parallel to the upper surface of the fixing plate 3432. (See reference...) Figure 11 Within a cross-section perpendicular to the height of the box body 100, the first inclined surface forms a fourth projection within its cross-section, and the central angle corresponding to the arc of the fourth projection is... The range is It is understandable that when the door 200 rotates relative to the housing 100, the rolling part 345 rotates around the hinge axis 320, and its trajectory is arc-shaped. Therefore, the trajectory of the first inclined surface 3401 is an arc, and the arc extends in the same direction as the first inclined surface 3401. Therefore, the central angle corresponding to this arc is... That is, the central angle corresponding to the arc length of the first inclined surface 3401. .

[0099] At the same time, the central angle of the first inclined surface 3401 is limited to This ensures that the door 200 obtains sufficient self-closing force under the action of gravity, and can reliably overcome the negative pressure of the freezer compartment to achieve a tight seal; at the same time, it avoids the large increase in resistance that needs to be overcome when opening the door due to the small angle, ensuring that the user can open the door with less effort, and taking into account the convenience of opening the door operation while ensuring reliable self-closing.

[0100] When the arc length of the first inclined surface 3401 corresponds to the central angle If the angle is too small, the slope of the first inclined surface 3401 will be too steep. Therefore, the gravity component that the door 200 needs to overcome when it is opened will be too large, increasing the user's feeling of difficulty in opening the door.

[0101] When the arc length of the first inclined surface 3401 corresponds to the central angle If the angle is too large, resulting in a gentle slope of the first inclined surface 3401, the gravitational force will be insufficient, which may lead to slow self-closing or failure to close completely.

[0102] In a cross-section parallel to the height of the housing 100, the projection of the platform surface 3403 within the cross-section is defined as the first straight line, and the projection of the upper surface of the fixing plate 3432 within the cross-section is defined as the second straight line. The distance between the first and second straight lines is L, where L ≥ 3mm. It can be understood that the distance L between the first and second straight lines is the height of the platform surface 3403 from the fixing component.

[0103] In the above technical solution, the platform surface 3403 is at least 3mm higher than the fixing component, providing a clear potential energy difference starting point for the rolling part 345 to transition from the platform surface 3403 to the first inclined surface 3401. When the roller 500 leaves the platform surface 3403 and enters the first inclined surface 3401, the 3mm height difference will form an initial gravitational component force. In conjunction with the first inclined surface 3401, this ensures that the door 200 obtains sufficient driving force as soon as it starts to self-close, increasing the gravity self-closing effect and ensuring that the door 200 obtains sufficient self-closing force under the action of the gravity component force, so as to reliably overcome the negative pressure of the freezer compartment and achieve a tight closure.

[0104] When the rolling part 345 abuts against the platform surface 3403, the door 200 opens to receive the cavity, and the gravitational potential energy of the door 200 reaches its maximum. When the rolling part 345 rolls from the second end of the platform surface 3403 toward the first end of the platform surface 3403, the closer the rolling part 345 is to the second end of the platform surface 3403, the angle of rotation of the door 200 relative to the box 100 gradually decreases. When the rolling part 345 is located at the second end of the first inclined surface 3401, the door 200, through its own gravity, drives the rolling part 345 to roll along the first inclined surface 3401 toward the first end close to the first inclined surface 3401, and the angle of rotation of the door 200 relative to the box 100 gradually decreases.

[0105] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

[0106] For ease of explanation, the above description has been provided in conjunction with specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or to limit the embodiments to the specific forms disclosed above. Various modifications and variations can be obtained based on the above teachings. The selection and description of the above embodiments are for the purpose of better explaining the principles and practical applications, thereby enabling those skilled in the art to better utilize the described embodiments and various different variations of embodiments suitable for specific use considerations.

Claims

1. A refrigerator characterized by comprising: include: A housing that defines multiple cavities; the height of the housing extends from its top to its bottom. A door, which is rotatably mounted on the housing to close or open the receiving cavity; A hinge assembly connects the door to the housing so that the door can be rotated relative to the housing; A gravity-operated self-closing structure is located on the lower side of the door. The gravity-controlled self-closing structure includes: A rolling part, which is rotatably connected to the lower end of the door body; A fastener, which is connected to the hinge assembly; the fastener includes: A fixing plate, which is connected to the hinge assembly; A guide portion, which cooperates with the rolling portion to allow the door to move along the height direction of the housing under its own weight; the guide portion includes: A first inclined surface, the first end of which is connected to a first portion of the fixing plate; the second end of which is away from the fixing member relative to the first end of the first inclined surface. The platform surface has a first end connected to the second end of the first inclined surface, the second end of the platform surface extends in a direction away from the second end of the first inclined surface, and the platform surface is parallel to the upper surface of the fixed plate. When the rolling part abuts against the platform surface, the door opens the receiving cavity, and the gravitational potential energy of the door reaches its maximum; when the rolling part rolls from the second end of the platform surface toward the first end of the platform surface, the angle of rotation of the door relative to the box gradually decreases. When the rolling part is located at the second end of the first inclined surface, the door body drives the rolling part to roll along the first inclined surface toward the first end closer to the first inclined surface by its own gravity, and the angle of the door body relative to the box body gradually decreases.

2. The refrigerator according to claim 1, characterized in that, The rolling part includes a roller component; A mounting part is provided at the lower end of the door body, and an installation space is provided in the mounting part. The roller is at least partially accommodated in the installation space, and the roller is rotatably connected to the mounting part.

3. The refrigerator according to claim 2, characterized in that, Along the height direction of the housing, the mounting portion extends from one end near the door to the other end near the fastener; The surface of the mounting part near the end of the fixing member is defined as the first plane, and the first plane is parallel to the platform surface.

4. The refrigerator according to claim 2, characterized in that, Along the height direction of the housing, the mounting portion extends from one end near the door to one end near the fixing plate; The surface of the mounting portion near the end of the fastener is defined as the third plane, and the surface of the first inclined surface is defined as the fourth plane. The third plane is parallel to the fourth plane.

5. The refrigerator according to claim 1, characterized in that, In a cross section perpendicular to the height of the box, the platform surface forms a first projection within the cross section; The central angle of a circle corresponding to the first projected arc is , wherein, is the maximum angle of the door body relative to the box body.

6. The refrigerator according to claim 1, characterized in that, The guide portion further includes a second inclined surface; The first end of the second inclined surface is connected to the second part of the fastener; the second end of the second inclined surface is away from the fastener relative to the first end of the second inclined surface; the second end of the platform surface is connected to the fastener through the second inclined surface.

7. The refrigerator according to claim 6, characterized in that Within a cross-section perpendicular to the height of the housing, the platform surface forms a second projection within that cross-section; The central angle of the circle corresponding to the second projected arc The range of .

8. The refrigerator according to claim 7, characterized in that, In a cross section perpendicular to the height of the box, the second inclined surface forms a third projection within the cross section; The central angle of the circle corresponding to the third projected arc is in the range of .

9. The refrigerator according to any one of claims 1 to 8, characterized in that, The number of guide portions is at least two, and the multiple guide portions are distributed along the circumference of the fixing member, and the multiple guide portions are centrally symmetrically distributed; The gravity self-closing structure also includes a retainer located at the lower end of the door body; the number of rolling parts is provided in multiples, and the multiple rolling parts are distributed circumferentially along the retainer, the multiple rolling parts are centrally symmetrically distributed, and the multiple rolling parts correspond one-to-one with the multiple guide parts.

10. A refrigerator characterized by comprising: include: A housing that defines multiple cavities; the height of the housing extends from its top to its bottom. A door, which is rotatably mounted on the housing to close or open the receiving cavity; A hinge assembly connects the door to the housing so that the door can be rotated relative to the housing; A gravity-operated self-closing structure is located on the lower side of the door. The gravity-controlled self-closing structure includes: A rolling part, which is rotatably connected to the lower end of the door body; A fastener, which is connected to the hinge assembly; the fastener includes: A fixing plate, which is connected to the hinge assembly; A guide portion, which cooperates with the rolling portion to allow the door to move along the height direction of the housing under its own weight; the guide portion includes: A first inclined surface, the first end of which is connected to a first portion of the fixed plate; the second end of which is away from the fixed plate relative to the first end of the first inclined surface. The platform surface has a first end connected to the second end of the first inclined surface, the second end of the platform surface extends in a direction away from the second end of the first inclined surface, and the platform surface is parallel to the upper surface of the fixed plate. In a cross section perpendicular to the height direction of the box, the first inclined surface forms a fourth projection in the cross section, and a circle center angle corresponding to the circular arc of the fourth projection is in the range of 0° to 180°. is in the range of 0° to 180°. In a cross section parallel to the height direction of the box, define the projection of the platform surface in the cross section as a first straight line, the projection of the upper surface of the fixed plate in the cross section as a second straight line, and the distance between the first straight line and the second straight line as , ; When the rolling part abuts against the platform surface, the door opens the receiving cavity, and the gravitational potential energy of the door reaches its maximum. As the rolling part rolls from the second end of the platform surface toward the first end of the platform surface, the closer the rolling part is to the second end of the platform surface, the smaller the angle at which the door body flips relative to the box body gradually becomes; When the rolling part is located at the second end of the first inclined surface, the door body drives the rolling part to roll along the first inclined surface toward the first end closer to the first inclined surface by its own weight, and the angle of the door body relative to the box body gradually decreases.

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