Refrigerator

Abstract

The utility model provides a refrigerator, belongs to the technical field of refrigeration equipment, and aims to solve the technical problem that articles are inconvenient to take and place due to the fact that a taking and placing opening is blocked when a door body of the refrigerator is at a large door opening angle or the maximum door opening angle. The refrigerator comprises a refrigerator body, a door body and a hinge. In the hinge, the first end of a first connecting rod is pivotally connected with the mounting seat through a first pivotal shaft (the axis point is defined as a point A), the first end of a second connecting rod is pivotally connected with the swing arm through a second pivotal shaft (the axis point is defined as a point D), and the first end of a fourth connecting rod is pivotally connected with the swing arm through a sixth pivotal shaft (the axis point is defined as a point C); in the process that the door body is gradually opened from the closed state, the included angle ADC formed by the point A, the point D and the point C is firstly increased and then decreased, and the maximum angle of the included angle is larger than 30 degrees, so that the point C can move towards the outer side of the box body as early as possible and as much as possible in the moving process, and when the door body is opened by a large door opening angle, the shielding of the door body to the taking and placing opening can be reduced.

Description

Technical Field

[0001] This application relates to the field of refrigeration equipment technology, and more particularly to a refrigerator. Background Technology

[0002] A refrigerator includes a cabinet, a door, and hinges. The cabinet forms a storage compartment for holding food or other items, and the door is movably mounted on the cabinet via hinges to open or close the access opening of the storage compartment.

[0003] In related technologies, the hinge includes a six-bar linkage. When the refrigerator needs to be embedded in the cabinet, the hinge can control the door to bypass the edge of the cabinet and move the door outward during the opening process, so as to avoid the door interfering with the cabinet during the opening process and to prevent the door from blocking the access opening.

[0004] However, for refrigerators equipped with hinges using the relevant technology, when the door is opened to a large or maximum opening angle, part of the door will still block the access opening, and there is still a problem of inconvenience in taking out and putting in items. Utility Model Content

[0005] This application provides a refrigerator that can solve the technical problem in related refrigerators where the door is blocked at a large opening angle or the maximum opening angle, making it inconvenient to take out or put in items.

[0006] This application provides a refrigerator, including:

[0007] The box has a storage compartment with an access opening on the front side; the front of the box also has a front wall.

[0008] The door is used to open or close the retrieval and placement opening;

[0009] Hinges connect the cabinet and the door. Hinges include:

[0010] Mounting base, located on the front wall of the box;

[0011] A swing arm is installed on the door body;

[0012] The first link, the first end of which is pivotally connected to the mounting base via a first pivot shaft;

[0013] The second link has its first end pivotally connected to the swing arm via a second pivot axis; its second end is pivotally connected to the second end of the first link via a third pivot axis.

[0014] The third link has its first end pivotally connected to the mounting base via a fourth pivot axis; its second end is pivotally connected to the second link via a fifth pivot axis.

[0015] The fourth link has its first end pivotally connected to the swing arm via the sixth pivot axis; its second end is pivotally connected to the third link via the seventh pivot axis.

[0016] Define the center point of the first pivot axis as point A, the center point of the second pivot axis as point D, and the center point of the sixth pivot axis as point C. Points A, D, and C form an angle ∠ADC.

[0017] As the door gradually opens from a closed state, the included angle ∠ADC first increases and then decreases, and the maximum angle of ∠ADC is greater than 30°.

[0018] In the refrigerator of this embodiment, during the gradual opening of the door from a closed state, the included angle ∠ADC first increases and then decreases, and the maximum angle of ∠ADC is greater than 30°. This allows point C to move towards the outside of the cabinet as early and as far as possible during the movement, so that when the door is opened to a larger angle, the obstruction of the access opening by the door can be reduced. At the same time, the distance that point C moves towards the front of the cabinet is also greatly increased, so that when the door is opened to a smaller angle, there is a sufficiently large safe distance between the first side edge of the door and the cabinet to avoid collision.

[0019] In some embodiments of this application, the maximum angle of included angle ∠ADC is greater than 32°.

[0020] With this configuration, when the maximum angle of the included angle ∠ADC is greater than 32°, compared to related technologies, the maximum angle of the included angle ∠ADC in quadrilateral ABCD is relatively increased, which allows the trajectories of points C and D to be relatively shifted outward by a certain amount. This ensures that the movement trajectories of points C and D move outward of the box as early and as much as possible. Consequently, with a larger door opening angle, the obstruction of the door to the retrieval opening can be reduced, making it easier to retrieve and place items from the retrieval opening.

[0021] In some embodiments of this application, the center point of the fourth pivot axis is defined as point B, the center point of the seventh pivot axis is defined as point O1, the distance between point C and point O1 is CO1, and the distance between point B and point O1 is BO1.

[0022] The CO1 / BO1 ratio is greater than 0.7 and less than 0.9.

[0023] With this configuration, when the CO1 / BO1 ratio is greater than 0.7, it ensures that point C's trajectory moves towards the outside of the box as early and as much as possible. When the CO1 / BO1 ratio is less than 0.9, with the hinge closed, the sixth pivot can retract as much as possible into the hinge, avoiding interference between the axes of the sixth and fourth pivots.

[0024] In some embodiments of this application, the center point of the fifth pivot axis is defined as point O2, the distance between point D and point O2 is DO2, and the distance between point C and point O1 is CO1;

[0025] The DO2 / CO1 ratio is greater than 0.9 and less than 1.1.

[0026] With this setting, the ratio of DO2 / CO1 is greater than 0.9 and less than 1.1, which ensures that the quadrilateral CO1O2D maintains a roughly parallelogram relationship as the door gradually opens from a closed state.

[0027] In some embodiments of this application, the mounting base has a mounting surface and a side end surface;

[0028] When the door is closed, the mounting surface faces the front wall of the box and is parallel to the front wall of the box.

[0029] The side end face is located on the front side of the front wall of the box and is perpendicular to the mounting surface;

[0030] Define the center point of the fourth pivot axis as point B;

[0031] Point A is closer to the mounting surface than point B, and point B is closer to the side end face than point A;

[0032] The angle between the line AB connecting points A and B and the side end face is defined as angle θ.

[0033] The included angle θ is greater than or equal to 25° and less than or equal to 36°.

[0034] With this configuration, when the included angle θ is greater than or equal to 25°, the movement trajectory of points C and D can shift outwards from the cabinet when the door is opened to a larger angle. This allows points C and D to shift outwards as a whole, relatively increasing the maximum opening angle of the door and better reducing the obstruction of the access opening by the door. When the included angle θ is less than or equal to 36°, with the length of AO3 remaining unchanged, point O3 can retract outwards from the cabinet, improving the compactness of the hinge, reducing the hinge's dimensions along the width of the cabinet, and enhancing the refrigerator's aesthetics.

[0035] In some embodiments of this application, the center point of the seventh pivot axis is defined as point O1, the center point of the fifth pivot axis is defined as point O2, the center point of the third pivot axis is defined as point O3, the distance between point A and point B is AB, the distance between point A and point O3 is AO3, the distance between point B and point O2 is BO2, and the distance between point O2 and point O3 is O2O3.

[0036] When the door is in the closed state, the following conditions are met:

[0037] With this configuration, when the door is closed, AO3 can be approximately parallel to the mounting surface, resulting in a sufficiently small lever arm for the hinge to support the door. This allows the hinge to retract sufficiently inward, reducing the moment of the door sinking under gravity and the moment of the door twisting under gravity. Furthermore, points B, O2, and O3 are made as collinear as possible, so that point O2 is on the side of triangle ABO3. This places point O2 near the side of the triangle formed by the fixed support points A and B, which support the door, and the farthest support point O3, thus ensuring a sufficiently small lever arm between point O2 and the equivalent support points in the triangle structure.

[0038] In some embodiments of this application, the center point of the seventh pivot axis is defined as point O1, the center point of the fifth pivot axis is defined as point O2, the center point of the third pivot axis is defined as point O3, the distance between point A and point B is AB, the distance between point A and point O3 is AO3, the distance between point B and point O2 is BO2, and the distance between point O2 and point O3 is O2O3.

[0039] When the door is in the closed state, the following conditions are met:

[0040] With this setting, AO3 is greater than 77; for example, AO3 can be 78, 78.5, 79, or even larger. As AO3 increases, the sum of AO3 + DO3 increases. When the door is opened at a large angle, such as greater than 90°, point D can move significantly outward from the box. This allows the door to move further away from the access opening, reducing obstruction and facilitating the retrieval of items.

[0041] In some embodiments of this application, the door has a front wall and a first side wall;

[0042] The front wall of a door is located in front of the door when the door is closed.

[0043] The first door side wall is located on the side of the door body closer to the hinge along its own width direction, and the intersection of the first door side wall and the front wall of the door forms the first door side edge;

[0044] When the door is in the closed state, the position of the first door side edge is defined as point E, and the length between point E and point C is defined as ec1;

[0045] During the process of a door gradually opening from a closed state, the minimum length of EC is defined as ec min ;

[0046] As the door gradually opens from a closed state, the length of EC first decreases from ec1 to ec min Then by EC minGradually increase.

[0047] With this configuration, the length of EC gradually decreases when the door is opened to a smaller angle, reducing the distance point C moves inward towards the inside of the cabinet and increasing the distance point C moves outward. This shifts the movement trajectory of point C towards the outside of the cabinet, increasing the distance between the door and the retrieval / dispensing opening. During door opening, this relatively reduces the door's obstruction of the retrieval / dispensing opening at any angle. Furthermore, the outward shift of point C's movement trajectory means that when the door is opened to its maximum angle, it is further offset towards the outside of the cabinet, thus increasing the maximum opening angle.

[0048] In some embodiments of this application, ec1 and ec min The difference is defined as Δec, which is greater than 3mm and less than 6mm.

[0049] This design reduces the distance point C moves inward towards the inside of the cabinet, while increasing the distance point C moves outward. This shifts the movement trajectory of point C towards the outside of the cabinet, increasing the distance between the door and the retrieval / dispensing opening, and reducing the door's obstruction of the opening. Furthermore, the outward shift of point C's movement trajectory means that when the door is opened to its maximum angle, it is more biased towards the outside of the cabinet, thus increasing the maximum opening angle.

[0050] In some embodiments of this application, ec1 and ec min The difference is defined as Δec, which is greater than 10%*ec1 and less than 20%*ec1.

[0051] This design reduces the distance point C moves inward towards the inside of the cabinet, while increasing the distance point C moves outward. This shifts the movement trajectory of point C towards the outside of the cabinet, increasing the distance between the door and the retrieval / dispensing opening, and reducing the door's obstruction of the opening. Furthermore, the outward shift of point C's movement trajectory means that when the door is opened to its maximum angle, it is more biased towards the outside of the cabinet, thus increasing the maximum opening angle.

[0052] In some embodiments of this application, the center point of the fourth pivot axis is defined as point B;

[0053] When points B, C, and D are collinear, the door opening angle is greater than 70°.

[0054] This setup delays the point at which points B, C, and D become collinear, while simultaneously accelerating the movement of point C towards the outside of the enclosure. In other words, it increases the door's opening angle when points B, C, and D are collinear, and before they become collinear, it increases the distance point C moves towards the front of the enclosure, while also increasing the distance point C moves towards the outside of the enclosure, thus reducing the degree to which the door obstructs the loading / unloading opening.

[0055] In some embodiments of this application, the center point of the fourth pivot axis is defined as point B;

[0056] When points B, C, and D are collinear, the door opening angle is greater than 80°.

[0057] This setup delays the point at which points B, C, and D become collinear, while simultaneously accelerating the movement of point C towards the outside of the enclosure. In other words, it increases the door's opening angle when points B, C, and D are collinear, and before they become collinear, it increases the distance point C moves towards the front of the enclosure, while also increasing the distance point C moves towards the outside of the enclosure, thus reducing the degree to which the door obstructs the loading / unloading opening.

[0058] In some embodiments of this application, the center point of the fourth pivot axis is defined as point B;

[0059] When the door opens at an angle of 90°, the projection of point C onto the front wall of the box lies between the orthographic projections of point A and point B onto the front wall of the box.

[0060] With this setup, when the door opening angle is 90°, CD is perpendicular to the front wall of the refrigerator. In normal refrigerator use, when the door is open at 90°, point C is more biased towards the outside of the refrigerator than point A. This allows points C and D to move sufficiently outward when CD is perpendicular to the front wall of the refrigerator, reducing the obstruction of the refrigerator's loading and unloading openings by the door.

[0061] In some embodiments of this application, the center point of the fourth pivot axis is defined as point B;

[0062] When the door opens at an angle of 90°, points B, C, and D are collinear.

[0063] With this setup, when the door opening angle is 90°, CD is perpendicular to the front wall of the refrigerator. In normal refrigerator use, when the door is open at 90°, point C is more biased towards the outside of the refrigerator than point A. This allows points C and D to move sufficiently outward when CD is perpendicular to the front wall of the refrigerator, reducing the obstruction of the refrigerator's loading and unloading openings by the door.

[0064] In some embodiments of this application, the center point of the fourth pivot axis is defined as point B;

[0065] When the door opening angle is 90°, the distance between the orthographic projection of point C on the front wall of the box and the orthographic projection of point A on the front wall of the box is greater than the distance between the orthographic projection of point B on the front wall of the box and the orthographic projection of point A on the front wall of the box.

[0066] With this setup, when the door opening angle is 90°, CD is perpendicular to the front wall of the refrigerator. In normal refrigerator use, when the door is open at 90°, point C is more biased towards the outside of the refrigerator than point B. This allows points C and D to move sufficiently outward when CD is perpendicular to the front wall of the refrigerator, reducing the obstruction of the refrigerator's loading and unloading openings by the door.

[0067] In some embodiments of this application, during the process of the door gradually opening from a closed state, when points A, C, and D are collinear, the opening angle of the door is greater than or equal to 98° and less than 120°.

[0068] With this configuration, when points A, C, and D are collinear, the door's opening angle is greater than or equal to 98°. This ensures that points A, C, and D are not collinear and also increases the distance point D can move outward from the box. In other words, it allows point D to move sufficiently outward from the box, enabling the door to swing as far outward as possible along its width, away from the hinge, thus reducing the door's obstruction of the box's access opening. When points A, C, and D are collinear, the door's opening angle is less than 120° to avoid an excessively large opening angle when points A, C, and D are collinear, which is beneficial for the stability and reliability of the door support.

[0069] In some embodiments of this application, during the process of the door gradually opening from a closed state, when points A, C, and D are collinear, the opening angle of the door is greater than or equal to 102° and less than 120°.

[0070] With this configuration, when points A, C, and D are collinear, the door's opening angle is greater than or equal to 102°. This ensures that points A, C, and D are not collinear and also increases the distance point D can move outward from the box. In other words, it allows point D to move sufficiently outward from the box, enabling the door to swing as far outward as possible along its width, away from the hinge, thus reducing the door's obstruction of the box's access opening. When points A, C, and D are collinear, the door's opening angle is less than 120° to avoid an excessively large opening angle when points A, C, and D are collinear, which is beneficial for the stability and reliability of the door. Attached Figure Description

[0071] To more clearly illustrate the implementation methods in the embodiments of this application or related technologies, the accompanying drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings.

[0072] Figure 1 This is a schematic diagram of the refrigerator according to an embodiment of this application when the door is opened to the maximum opening angle;

[0073] Figure 2This is a schematic diagram of the refrigerator in the closed state according to an embodiment of this application;

[0074] Figure 3 for Figure 1 A top view of the refrigerator;

[0075] Figure 4 for Figure 2 A top view of the refrigerator;

[0076] Figure 5 for Figure 4 A magnified view of a portion of point P1 in the middle;

[0077] Figure 6 This is a schematic diagram of the refrigerator according to an embodiment of this application when the door opening angle is 30°.

[0078] Figure 7 This is a schematic diagram of the refrigerator according to an embodiment of the present application when the door opening angle is 60°;

[0079] Figure 8 This is a schematic diagram of the refrigerator according to an embodiment of this application when the door opening angle is 90°.

[0080] Figure 9 for Figure 3 A magnified view of a portion of point P2 in the middle;

[0081] Figure 10 for Figure 6 A schematic diagram of the central hinge;

[0082] Figure 11 This is a schematic diagram of the hinge structure and the movement trajectory of CD in a refrigerator door that opens from a closed state to the maximum opening angle according to an embodiment of this application.

[0083] Figure 12 for Figure 5 A schematic diagram of the structure of the central hinge and the movement trajectory of CD during the opening of the door;

[0084] Figure 13 As the hinge in this embodiment of the application increases ∠BO1C to the same angle, points C and C2... a A schematic diagram of its movement trajectory;

[0085] Figure 14 for Figure 6 Schematic diagrams of the middle hinge before and after CO1 increases;

[0086] Figure 15 This is a schematic diagram of the hinge corresponding to the door opening angle of the refrigerator in this embodiment of the application when the door opening angle is 110°;

[0087] Figure 16This is a schematic diagram of the hinge of the refrigerator according to an embodiment of this application when the door opening angle is 80°;

[0088] Figure 17 This is a schematic diagram of the hinge of the refrigerator according to an embodiment of this application when the door opening angle is 90°;

[0089] Figure 18 This is a schematic diagram of the hinge corresponding to a refrigerator with a door opening angle of 100° according to an embodiment of this application.

[0090] Explanation of reference numerals in the attached figures:

[0091] 10-Box;

[0092] 110 - Inner liner of the box; 120 - Outer shell of the box;

[0093] 111 - Storage room; 112 - Access port;

[0094] 121 - Front wall of the box; 122 - Rear wall of the box;

[0095] 123 - Box sidewall;

[0096] 20-Gate body;

[0097] 21-Door panel; 22-Door liner;

[0098] 23 - Door frame; 210 - Back wall of door;

[0099] 220 - Front wall of the door; 230 - Side wall of the door;

[0100] 231 - Side wall of the first door; 232 - Side wall of the second door;

[0101] 201 - Side edge of the first door; 202 - Side edge of the second door;

[0102] 203 - Mounting slot; 204 - First slot opening;

[0103] 205 - Second slot;

[0104] 30-Hinge;

[0105] 310 - Mounting base; 311 - Mounting surface;

[0106] 312 - Side end face; 320 - Swing arm;

[0107] 330 - First link; 340 - Second link;

[0108] 350 - Third link; 360 - Fourth link;

[0109] 301 - First pivot axis; 302 - Second pivot axis;

[0110] 303 - Third pivot axis; 304 - Fourth pivot axis;

[0111] 305 - Fifth pivot axis; 306 - Sixth pivot axis;

[0112] 307 - Seventh pivot axis;

[0113] 40 - Cabinets;

[0114] 401 - Reception chamber; 402 - Reception side wall;

[0115] 403 - Front wall of cabinet; 404 - Side edge of cabinet. Detailed Implementation

[0116] To make the objectives, implementation methods and advantages of this application clearer, the exemplary implementation methods of this application will be clearly and completely described below with reference to the accompanying drawings of the exemplary embodiments of this application. Obviously, the described exemplary embodiments are only some embodiments of this application, and not all embodiments.

[0117] It should be noted that the brief descriptions of terms in this application are only for the convenience of understanding the embodiments described below, and are not intended to limit the embodiments of this application. Unless otherwise stated, these terms should be understood in their ordinary and common meaning.

[0118] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover but not exclusively include, for example, a product or device that includes a series of components is not necessarily limited to those that are explicitly listed, but may include other components that are not explicitly listed or that are inherent to such product or device.

[0119] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are 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.

[0120] The terms "first," "second," and "third," etc., 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. Therefore, a feature defined as "first," "second," or "third" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0121] 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.

[0122] In the description of this application, "at least one of A, B and C" has the same meaning as "at least one of A, B or C", both including the following combinations of A, B and C: only A, only B, only C, a combination of A and B, a combination of A and C, a combination of B and C, and a combination of A, B and C.

[0123] "A and / or B" includes the following three combinations: A only, B only, and a combination of A and B.

[0124] The use of “for” or “configured to” in this application implies an open and inclusive language that does not exclude devices used or configured to perform additional tasks or steps.

[0125] As used in this application, “about,” “basically,” “roughly,” or “approximately” includes the stated value and the average value within an acceptable range of deviation from the given value, wherein the acceptable range of deviation is determined by a person skilled in the art taking into account the measurement under discussion and the error associated with the measurement of the given quantity (i.e., the limitations of the measurement system).

[0126] As used in this application, "parallel," "perpendicular," and "equal" include the described situation and situations that are similar to the described situation, within an acceptable deviation range, which is determined by a person skilled in the art taking into account the measurement under discussion and the error associated with the measurement of a particular quantity (i.e., the limitations of the measurement system). For example, "parallel" includes absolute parallelism and approximate parallelism, where the acceptable deviation range for approximate parallelism can be, for example, a deviation within 5°; "perpendicular" includes absolute perpendicularity and approximate perpendicularity, where the acceptable deviation range for approximate perpendicularity can also be, for example, a deviation within 5°. "Equal" includes absolute equality and approximate equality, where the acceptable deviation range for approximate equality can be, for example, a difference between the two equals less than or equal to 3% of either one. "Unchanged" includes absolute equality and approximate equality, where the acceptable deviation range for approximate equality can be, for example, a difference between the two equals less than or equal to 3% of either one.

[0127] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this disclosure 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, and therefore should not be construed as a limitation of this disclosure.

[0128] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0129] It should be noted that, in the embodiments of this application, "front side" refers to the side of the refrigerator facing the user when it is in normal use. "Rear side" refers to the side opposite to the front side, that is, the side of the refrigerator facing away from the user when it is in normal use.

[0130] refer to Figure 1 The refrigerator in this application embodiment may include a cabinet 10 having a storage compartment 111, a door 20 connected to the cabinet 10 to open and close the storage compartment 111, and a refrigeration device for supplying cold air to the storage compartment 111.

[0131] In some embodiments, the housing 10 may be configured with at least one storage compartment 111 for storing food or other items. The storage compartment 111 may be configured as a refrigerator compartment or a freezer compartment. It is understood that in some possible implementations, the storage compartment 111 may also be configured as a variable temperature compartment with internal temperature variations, which will not be elaborated further in this application embodiment.

[0132] A retrieval opening 112 may be formed on the front side of the storage room 111, through which users can retrieve items from the storage room 111 or place items into the storage room 111.

[0133] The enclosure 10 may include a front wall 121, which may be located on the front side of the enclosure 10.

[0134] The enclosure 10 may also include a rear wall 122, which may be located at the rear of the enclosure 10. The rear wall 122 and the front wall 121 may be arranged opposite each other along the depth direction Y of the enclosure.

[0135] The box body 10 may also include two box side walls 123, which can be arranged opposite each other along the width direction X of the box body and are both connected to the front wall 121 and the rear wall 122 of the box.

[0136] In some embodiments, the box body 10 may include an inner liner 110, which may form a storage room 111.

[0137] The enclosure 10 may also include an outer shell 120, which is connected to the outside of the inner liner 110 to form the appearance of the enclosure 10. The outer shell 120 may include a front wall 121, a rear wall 122, and a side wall 123.

[0138] In some embodiments, a refrigeration device may be disposed within the housing 10. The refrigeration device may be a refrigeration device of the related art. The refrigeration device is used to provide cold air to the storage compartment 111 to reduce the temperature inside the storage compartment 111.

[0139] In some embodiments, reference Figure 1 and Figure 2 The door 20 can be rotatably connected to the box 10 to open and close the access port 112 of the storage room 111.

[0140] refer to Figure 1 When the door 20 is in the open state, the door 20 opens the access port 112, and the user can take items from the storage room 111 or put items into the storage room 111 through the access port 112.

[0141] When door 20 is in the closed state (refer to) Figure 2 The door 20 closes the access port 112 to reduce the leakage of cold air from the access port 112 in the storage compartment 111, thereby improving the cooling effect of the refrigerator on the items in the storage compartment 111.

[0142] Each storage room 111 may be equipped with at least one door 20.

[0143] For example, refer to Figure 1 The storage compartment 111 located on the upper part of the box 10 can be equipped with a door 20.

[0144] It is understood that each storage room 111 may also be provided with two double doors 20, which will not be described in detail in this embodiment.

[0145] refer to Figure 1 and Figure 3The door 20 may include a rear wall 210. It should be noted that the rear wall 210 is not perfectly flat; a door seal may be installed on the rear wall 210 to improve sealing, and storage space, such as a storage box or ice maker, may also be provided. Understandably, when the door 20 is closed, at least part of the rear wall 210 cooperates with the front wall 121 of the cabinet to form a relatively sealed space in the storage compartment 111.

[0146] When the door 20 is closed, the rear wall 210 can be located behind the door 20. A part of the rear wall 210 corresponds to the take-out opening 112, and another part of the rear wall 210 corresponds to the front wall 121 of the box.

[0147] refer to Figure 3 The door body 20 may also include a front wall 220. The front wall 220 and the rear wall 210 are arranged opposite each other along the thickness direction of the door body 20.

[0148] refer to Figure 4 and Figure 5 When the door 20 is closed, the front wall 220 can be located in front of the door 20, and the distance between the front wall 220 and the front wall 121 of the box is greater than the distance between the rear wall 210 and the front wall 121 of the box.

[0149] refer to Figure 4 The door body 20 may also include two door side walls 230, which may be arranged opposite to each other along the width direction of the door body 20. Both door side walls 230 may be connected to the front wall 220 and the rear wall 210.

[0150] In some embodiments of this application, reference is made to Figure 1 and Figure 2 The door body 20 may include a door panel 21, a door inner liner 22, and a door frame 23. The door panel 21 and the door inner liner 22 may be respectively connected to opposite sides of the door frame 23 along its depth direction. When the door body 20 is in the closed state, the depth direction of the door frame 23 is substantially consistent with the depth direction of the housing 10. The door panel 21, the door inner liner 22, and the door frame 23 form the appearance of the door body 20.

[0151] refer to Figure 5 The front side of the door panel 21 has a front wall 220.

[0152] The door frame 23 can be rotatably connected to the box 10. The door frame 23 has high structural strength, and the rotatable connection between the door frame 23 and the box 10 can improve the reliability of the connection between the door frame 23 and the box 10.

[0153] refer to Figure 4 and Figure 5The door frame 23 has a rear wall 210 on the side opposite to the door panel 21. The door frame 23 has a side wall 230 at each end along its width direction.

[0154] refer to Figure 4 and Figure 5 Of the two door side walls 230 of the door body 20, the one closer to the hinge 30 is the first door side wall 231, and the other is the second door side wall 232. The intersection of the front wall 220 of the door body 20 and the first door side wall 231 forms the first door side ridge 201. The intersection of the rear wall 210 of the door body 20 and the first door side wall 231 forms the second door side ridge 202. It can be understood that when the door body 20 is in the closed state, the first door side ridge 201 is located in front of the second door side ridge 202.

[0155] It should be noted that in some embodiments, the front wall 220 and the first side wall 231 can both be flat walls. The intersection line of the plane where the front wall 220 is located and the plane where the first side wall 231 is located is the theoretical first side edge 201, which extends approximately along the height direction of the door body 20.

[0156] Similarly, the rear wall 210 and the first side wall 231 can both be flat walls, and the intersection line of the planes where the rear wall 210 and the first side wall 231 are located represents the second side edge 202.

[0157] In some embodiments, a chamfer may be provided at the intersection of the front wall 220 and the first door side wall 231, and the chamfer forms a first curved surface extending along the height direction of the door body 20. For ease of description and understanding, the intersection line of the extended surfaces of the front wall 220 and the first door side wall 231 represents the first door side edge 201.

[0158] Similarly, refer to Figure 5 A chamfer can also be provided at the intersection of the rear wall 210 of the door and the first side wall 231 of the door. The chamfer forms a second curved surface that extends along the height direction of the door body 20. For ease of description, the intersection line of the extended surfaces of the rear wall 210 of the door and the first side wall 231 of the door represents the second side edge 202 of the door.

[0159] The refrigerator of this embodiment can be embedded in a cabinet 40 or a wall.

[0160] refer to Figure 5Taking a refrigerator that can be embedded in a cabinet 40 as an example, the cabinet 40 can form a receiving chamber 401 with a front opening. The refrigerator can be housed in the receiving chamber 401. The receiving chamber 401 has two receiving side walls 402 arranged opposite to each other. After the refrigerator is embedded in the cabinet 40, parts of the cabinet side wall 123 and the receiving side wall 402 are opposite to each other. When the door 20 is in the closed state, the door side wall 230 of the door 20 is opposite to the receiving side wall 402. The cabinet 40 has a front wall 403 located at the front. After the refrigerator is embedded in the cabinet 40, when the door 20 is in the closed state, the door front wall 220 can be basically flush with the front wall 403. In this way, the refrigerator is embedded in the cabinet 40 and does not protrude from the front wall 403 of the cabinet 40, improving the space utilization and decoration of the room.

[0161] A cabinet side ridge 404 is formed at the intersection of the front wall 403 and the receiving side wall 402 of the cabinet 40. After the refrigerator is embedded in the cabinet 40, when the door 20 is opened, the door 20 needs to first pass around the cabinet side ridge 404 to reduce the collision between the door 20 and the cabinet. After the door 20 passes around the cabinet side ridge 404, the door needs to move outward of the cabinet body 10 to increase the opening angle of the door 20 and reduce the obstruction of the access opening 112 by the door 20, thereby facilitating the retrieval of items through the access opening 112.

[0162] In some embodiments, the refrigerator may further include a hinge 30. The door 20 can be connected to the cabinet 10 via the hinge 30. Exemplarily, one end of the door 20 along its width direction can be connected to the front wall 121 of the cabinet via the hinge 30, so that the door 20 can rotate relative to the cabinet 10. During the rotation of the door 20 relative to the cabinet 10, under the action of the hinge 30, the door 20 can bypass the cabinet side edge 404 of the cabinet 40, thereby reducing the possibility of the door 20 interfering with the cabinet 40 when opened. In addition, the hinge 30 can increase the opening angle of the door 20 and reduce the obstruction of the access opening 112 by the door 20 after it is opened, so as to facilitate the user to take out and put in items.

[0163] It should be noted that the opening angle of door 20 refers to... Figure 6 As shown, when the door 20 is opened, the angle α between the front wall 220 of the door and the front wall 121 of the box is referred to as the opening angle.

[0164] The following is for reference. Figures 5-9 The hinge 30 of the present application embodiment will be described in detail.

[0165] The hinge 30 may include a mounting base 310. The mounting base 310 may be disposed on the front wall 121 of the housing 10. Exemplarily, the mounting base 310 may be mounted to the front wall 121 by fastening screws.

[0166] The mounting base 310 may have a mounting surface 311 facing the front wall 121 of the enclosure. The mounting surface 311 is basically fitted to the front wall 121 of the enclosure 10. That is to say, the mounting surface 311 can be roughly parallel to the front wall 121 of the enclosure to improve the reliability of the assembly of the mounting base 310 and the front wall 121 of the enclosure.

[0167] Additionally, the mounting base 310 may have a side end face 312, which is opposite to the first door side wall 231, or, after the refrigerator is embedded in the cabinet 40, the side end face 312 is opposite to the receiving side wall 402. The side end face 312 may be approximately perpendicular to the front wall 121 of the cabinet and approximately parallel to the side wall 123 of the cabinet.

[0168] The hinge 30 may also include a swing arm 320. The swing arm 320 may be disposed on one side of the rear wall 210 of the door body 20. It should be noted that the swing arm 320 is connected to the door body 20, and the rotation of the swing arm 320 drives the rotation of the door body 20.

[0169] In some embodiments, the rear wall 210 of the door may be formed with a mounting groove 203 recessed in the direction from the rear wall 210 to the front wall 220 of the door. The mounting groove 203 may penetrate the first door side wall 231. That is, when the door 20 is in the closed state, the mounting groove 203 has a first slot 204 on the side facing the front wall 121 of the box, and a second slot 205 on the side facing the receiving side wall 402. The second slot 205 and the first slot 204 are connected.

[0170] The swing arm 320 can be installed in the mounting groove 203. The swing arm 320 can be connected to the groove wall of the mounting groove 203 by fastening screws, or it can be connected to the groove wall by fasteners through an adapter component on the swing arm 320. The connection between the swing arm 320 and the groove wall of the mounting groove 203 achieves the purpose of fixing the swing arm 320 to the door body 20.

[0171] In some embodiments, the mounting groove 203 may include a first groove wall, a second groove wall, a third groove wall, and a fourth groove wall; wherein the first groove wall may be opposite to the first groove opening 204. The second groove wall may be opposite to the second groove opening 205. The third groove wall and the fourth groove wall are disposed opposite each other along the height direction of the housing 10. The third groove wall may be connected to the bottom of the first groove wall and the second groove wall. The fourth groove wall may be connected to the top of the first groove wall and the second groove wall. The swing arm 320 may be connected to at least one of the first groove wall, the second groove wall, the third groove wall, and the fourth groove wall to connect the swing arm 320 to the groove wall of the mounting groove 203.

[0172] In the implementation of the swing arm 320 being connected to the first groove wall, fasteners can be sequentially inserted forward through the swing arm 320 and the first groove wall to connect the swing arm 320 to the first groove wall.

[0173] In some embodiments, the mounting groove 203 may extend upwards or downwards through the door body 20. Taking the mounting groove 203 extending upwards through the door body 20 as an example, the mounting groove 203 may include a first groove wall, a second groove wall, a third groove wall, and a fourth groove wall; wherein, the first groove wall may be opposite to the first groove opening 204. The second groove wall may be opposite to the second groove opening 205. The third groove wall may be connected to the bottom of the first groove wall and the second groove wall. The swing arm 320 may be connected to at least one of the first groove wall, the second groove wall, and the third groove wall to connect the swing arm 320 to the groove wall of the mounting groove 203.

[0174] In the implementation of the swing arm 320 being connected to the third groove wall, a transition component can be fixedly installed on the swing arm 320, and fasteners can be sequentially inserted downward through the transition component and the third groove wall to connect the swing arm 320 to the third groove wall.

[0175] It should be noted that when the door 20 is closed, the mounting groove 203 allows the hinge 30 to be concealed within the door 20, thus preventing interference between the door 20 and the hinge 30, and allowing the door 20 to fit snugly against the cabinet 10 to seal the storage compartment 111. During the rotation of the door 20 relative to the cabinet 10, the first groove 204 and the second groove 205 provide space for the hinge 30 to move, reducing interference between the door 20 and the hinge 30.

[0176] The hinge 30 may also include a first link 330.

[0177] The first link 330 may have a first end, and the first end of the first link 330 and the mounting base 310 may be pivotally connected via a first pivot shaft 301. The first link 330 and the mounting base 310 may rotate relative to each other about the axis of the first pivot shaft 301. The center point of the axis of the first pivot shaft 301 is marked as point A.

[0178] The first link 330 may have a second end, and the second end of the first link 330 and the first end of the first link 330 are respectively located at opposite ends of the extension direction of the first link 330. It should be noted that, for engineering design purposes, the first end and the second end of the first link 330 are not, in terms of their relative positions in the extension direction, the ends of the first link 330 are not the ends of the first link 330.

[0179] The hinge 30 may also include a second link 340.

[0180] The second link 340 has a first end, which is pivotally connected to the swing arm 320 via a second pivot shaft 302. The second link 340 and the swing arm 320 can rotate relative to each other about the axis of the second pivot shaft 302. The center point of the axis of the second pivot shaft 302 is marked as point D.

[0181] The second link 340 may also have a second end, which is located at the two ends of the first link 340's extension direction, respectively. The second end of the second link 340 and the second end of the first link 330 can be pivotally connected via a third pivot axis 303. The second link 340 and the first link 330 can rotate relative to each other about the axis of the third pivot axis 303. The center point of the axis of the third pivot axis 303 is marked as point O3.

[0182] The hinge 30 may also include a third link 350.

[0183] The third link 350 has a first end, which is further away from the front wall 121 of the housing than the first end of the first link 330. The first end of the third link 350 is pivotally connected to the mounting base 310 via a fourth pivot axis 304. The third link 350 and the mounting base 310 are rotatable relative to each other about the axis of the fourth pivot axis 304. The center point of the axis of the fourth pivot axis 304 is marked as point B.

[0184] The third link 350 may have a second end, and the second end and the first end of the third link 350 are located at opposite ends in the extension direction of the third link 350. The second end of the third link 350 is pivotally connected to the second link 340 via a fifth pivot axis 305. The third link 350 and the second link 340 are rotatable relative to each other about the axis of the fifth pivot axis 305. The center point of the axis of the fifth pivot axis 305 is marked as point O2. The pivot position of the second link 340 relative to the third link 350 is located between the first end and the second end of the second link 340. That is, the fifth pivot axis 305 is located between the first end and the second end of the second link 340.

[0185] Hinge 30 may also include a fourth link 360.

[0186] The fourth link 360 may have a first end, which is closer to the first door sidewall 231 of the door body 20 than the first end of the second link 340. The first end of the fourth link 360 and the swing arm 320 can be pivotally connected via a sixth pivot axis 306. The fourth link 360 and the swing arm 320 can rotate relative to each other about the axis of the sixth pivot axis 306. The center point of the axis of the sixth pivot axis 306 is marked as point C.

[0187] The fourth link 360 may also have a second end, which is located at one end of the first end of the fourth link 360, respectively, along with the second end of the fourth link 360 in its extension direction. The second end of the fourth link 360 is pivotally connected to the third link 350 via a seventh pivot axis 307. The fourth link 360 and the third link 350 are rotatable relative to each other about the axis of the seventh pivot axis 307. The center point of the axis of the seventh pivot axis 307 is marked as point O1. The pivot position of the third link 350 relative to the fourth link 360 is located between the first end and the second end of the third link 350. That is, the seventh pivot axis 307 is located between the first end and the second end of the third link 350.

[0188] The axes of the first pivot 301, the second pivot 302, the third pivot 303, the fourth pivot 304, the fifth pivot 305, the sixth pivot 306, and the seventh pivot 307 are all parallel to each other. The mounting base 310, the swing arm 320, the first link 330, the second link 340, the third link 350, and the fourth link 360 form a six-bar linkage.

[0189] In some embodiments, after the mounting base 310 is installed onto the front wall 121 of the housing 10, point A is closer to the mounting surface 311 than point B, and point B is closer to the side end face 312 than point A.

[0190] In some embodiments, after the swing arm 320 is installed onto the door body 20, the line CD connecting points C and D can be approximately parallel to the front wall 220 of the door.

[0191] In the description of the embodiments of this application, moving towards the front of the housing 10 can be along... Figure 5 The positive direction of the depth Y of the middle housing 10 (the direction indicated by the Y-arrow). Moving towards the rear of the housing 10 can be along... Figure 5 The negative direction of the depth direction Y of the middle housing 10 (the opposite direction of the direction indicated by the Y-arrow). Moving outward from the housing 10 can be along... Figure 5 The positive direction of the width direction X of the middle housing 10 (the direction indicated by the X arrow). Moving inwards from the housing 10 can be along... Figure 5 The negative direction of the width direction X of the middle box 10 (the opposite direction of the direction pointed to by the X arrow).

[0192] refer to Figures 5-9A pulling force is applied to the door 20, causing it to gradually open from a closed state. During this process, the door 20 drives the swing arm 320 to move first towards the front and inner side of the housing 10, and then towards the front and outer side of the housing 10. The swing arm 320 drives the second link 340 and the fourth link 360, causing the second link 340 to rotate relative to the swing arm 320 in a first direction, and causing the fourth link 360 to rotate relative to the swing arm 320 in the first direction. For example, the first direction can be... Figure 6 and Figure 7 The direction shown is counterclockwise. The second link 340 drives the first link 330 and the third link 350, causing the first link 330 to rotate relative to the mounting base 310 in a second direction, and causing the third link 350 to rotate relative to the mounting base 310 in a second direction. The fourth link 360 drives the third link 350, causing the third link 350 to rotate relative to the mounting base 310 in a second direction. The second direction is opposite to the first direction. For example, the second direction could be... Figure 6 and Figure 7 As shown in the clockwise direction, as the opening angle of the door 20 gradually increases, the hinge 30 is gradually unfolded until the hinge 30 is in the unfolded state, at which point the door 20 is opened to the desired position. Figure 9 The maximum door opening angle α shown max .

[0193] As a pushing force is applied to the door 20, causing it to gradually close from its maximum opening angle, the door 20 drives the swing arm 320 to move first inward and backward, and then outward and backward towards the housing 10. The swing arm 320 drives the second link 340 and the fourth link 360, causing the second link 340 to rotate relative to the swing arm 320 in a second direction, and the fourth link 360 to rotate relative to the swing arm 320 in a second direction. The second link 340 drives the first link 330 and the third link 350, causing the first link 330 to rotate relative to the mounting base 310 in a first direction, and the third link 350 to rotate relative to the mounting base 310 in a first direction. The fourth link 360 drives the third link 350, causing the third link 350 to rotate relative to the mounting base 310 in a first direction. As the opening angle of the door 20 gradually decreases, the hinge 30 gradually retracts until the hinge 30 is in the closed state, at which point the door 20 is also in the closed state.

[0194] It should be noted that the door opening angle in this application can be obtained by actually measuring the equivalent door opening angle. The equivalent door opening angle can refer to the angle between the plane containing the mounting surface 311 on the mounting base 310, which is parallel to the front wall 121 of the box, and the connecting line CD. In the embodiments of this disclosure, since the plane containing the mounting surface 311 is parallel to the front wall 121 of the box, and the connecting line CD is parallel to the front wall 220 of the door, the door opening angle and the equivalent door opening angle are substantially equal. Because installation errors or deviations between the door body 20 and the swing arm 320 may cause the connecting line CD to be approximately parallel to the front wall 220 of the door, the equivalent door opening angle can be used to explain the door opening angle in some embodiments of this application.

[0195] Some embodiments disclosed herein can solve any one of the following technical problems:

[0196] 1. When hinges from the home furnishing industry are applied to refrigerators, when the door is at its maximum opening angle, the relatively thick part of the refrigerator door near its second door side edge can obstruct the access opening of the storage compartment, causing inconvenience in retrieving and placing items. In some embodiments of this application, the refrigerator door 20 can move to a greater extent outward relative to the cabinet 10 during the opening process. When the door 20 is at a larger or maximum opening angle, the obstruction of the access opening 112 by the part of the door 20 near the second door side edge 202 can be reduced or eliminated, facilitating the user's access to items in the storage compartment 111. Especially when drawers are installed in the storage compartment 111, interference between the drawer and the door 20 can be prevented during the process of pushing and pulling the drawer after opening the door 20.

[0197] 2. When applying hinges from the home furnishing industry to refrigerators, in the initial stage of opening the door, i.e., when the door opening angle is small, the door moves a larger extent inward relative to the cabinet body and a smaller extent outward relative to the cabinet body. This results in a relatively small maximum opening angle, which is insufficient to reduce or eliminate the problem of the part of the door 20 near the second door side edge 202 obstructing the access opening 112. In the refrigerator of this embodiment, in the initial stage of opening, the door 20 can move a smaller extent inward relative to the cabinet body 10, and move outward earlier and a larger extent outward relative to the cabinet body 10. This allows the door 20 to be more biased towards the outside of the cabinet body 10 when opened to the maximum opening angle, thereby increasing the maximum opening angle of the door 20.

[0198] Any one of the technical disclosures in this application can solve one or more of the aforementioned technical problems and achieve a certain inventive objective to a certain extent; multiple technical disclosures can also be combined into an overall solution to solve one or more of the aforementioned technical problems and achieve a certain inventive objective; alternatively, some technical disclosures can be selected and combined into an overall solution, while employing prior art and deteriorating solutions, but the deterioration trend can be compensated for by the means of this technical disclosure, thus solving one or more of the aforementioned technical problems and achieving a certain inventive objective to a certain extent as a whole. However, each technical disclosure combined into a complete technical solution constitutes an organically inseparable overall solution, solving the technical problems and achieving a certain inventive objective as a whole.

[0199] Any technical disclosure in this application, as well as the recombination of multiple technical disclosures, can form a complete technical solution and solve one or more of the aforementioned technical problems, thereby achieving the inventive objective. All of these fall under the scope of this application and are directly and unambiguously determined based on the content of this application.

[0200] The following describes the technical solution of the embodiment of this application in further detail, taking the door 20 with an opening angle of 30° as an example.

[0201] refer to Figure 6 and Figure 10 , Figure 6 This is a schematic diagram of the refrigerator according to an embodiment of this application when the door opening angle is 30°. Figure 10 for Figure 6 A schematic diagram of the hinge.

[0202] It should be noted that, in cases such as Figure 10 In the schematic diagram of the hinge shown, the center of each pivot axis is represented as a point. To facilitate the description of the embodiments of this application in conjunction with the accompanying drawings, the pivot axis and its center point can be represented below by a point corresponding to the center of each pivot axis.

[0203] For example, point A can represent the first pivot axis 301 and its center point, point D can represent the second pivot axis 302 and its center point, point O3 can represent the third pivot axis 303 and its center point, point B can represent the fourth pivot axis 304 and its center point, point O2 can represent the fifth pivot axis 305 and its center point, point C can represent the sixth pivot axis 306 and its center point, and point O1 can represent the seventh pivot axis 307 and its center point.

[0204] like Figure 10As shown in the diagram, line segment AB can be represented as mounting base 310, line segment CD can be represented as swing arm 320, line segment AO3 can be represented as first link 330, broken line DO2O3 can be represented as second link 340, line segment BO1O2 can be represented as third link 350, and line segment CO1 can be represented as fourth link 360. AB, CD, AO3, DO2O3, BO1O2, and CO1 form a six-bar linkage.

[0205] Since the mounting base 310 is fixedly connected to the housing 10, the first pivot shaft 301 and the fourth pivot shaft 304 can be pivotally connected to the mounting base 310 respectively. That is, AB is fixedly connected to the housing 10. Therefore, during the rotation of the door 20 relative to the housing 10, points A and B are fixed relative to the housing 10.

[0206] Since the swing arm 320 is fixedly connected to the door body 20, that is, CD is fixedly connected to the door body 20, points C and D are fixed relative to the door body 20 during the rotation of the door body 20 relative to the box body 10. Therefore, the movement trajectory of points C and D can be used to characterize the movement trajectory of the door body 20.

[0207] The trajectories of points C and D are formed by quadrilateral ABCD. In quadrilateral ABCD, the lengths of AB and CD are fixed. During the rotation of door 20 relative to box 10, the lengths of BC and AD are variable, and the lengths of BC and AD increase with the increase of the door opening angle. The rate of change of the length of BC is different from that of AD.

[0208] The trajectories of points C and D can also be formed by triangles BCD and ABD. In triangle BCD, the length of CD is a fixed value. During the rotation of door 20 relative to box 10, the lengths of BC and BD are variable values, and their lengths increase with the opening angle. The rate of change of BC's length is different from that of BD's length. Similarly, in triangle ABD, the length of AB is a fixed value. During the rotation of door 20 relative to box 10, the lengths of AD and BD are variable values, and their lengths increase with the opening angle. The rate of change of AD's length is different from that of BD's length.

[0209] During the rotation of the door 20 relative to the housing 10, the position of the mounting base 310 relative to the housing 10 remains fixed, while the swing arm 320 moves with the movement of the door 20. Therefore, points A and B remain fixed relative to the housing 10, while the positions of points C and D change. During this process, refer to... Figure 10Point O1 moves around point B in a circle with radius BO1, and the trajectory of point O1 is part of the first circle C1; point C moves around point O1 in a circle with radius CO1, and the trajectory of point C is part of the second circle C2. Points B, C, and O1 form a triangle (ΔBO1C).

[0210] In ΔBO1C, according to the Law of Cosines, the length of BC satisfies the following formula:

[0211] BC 2 =BO1 2 +CO1 2 -2×BO1×CO1×cosω1 (1)

[0212] In the above formula (1), the distance BO1 between point B and point O1 remains constant; the distance CO1 between point C and point O1 remains constant; ω1 is ∠BO1C, refer to Figure 10 and Figure 11 It can be seen that ω1 increases with the increase of the opening angle of the door 20, and ω1 is less than 180°; therefore, the length of BC increases with the increase of the opening angle α.

[0213] As door 20 rotates relative to box 10, point O2 moves in a circle with radius BO2 around point B, and the trajectory of point O2 is part of the third circle C3; point D moves in a circle with radius DO2 around point O2, and the trajectory of point D is part of the fourth circle C4. Points B, O2, and D form a triangle (ΔBO2D).

[0214] In ΔBO2D, according to the Law of Cosines, the length of BD satisfies the following formula:

[0215] BD 2 =BO2 2 +DO2 2 -2×BO2×DO2×cosω2 (2)

[0216] In the above formula (2), the distance BO2 between point B and point O2 remains constant; the distance DO2 between point D and point O2 remains constant; ω2 is ∠BO2D, refer to Figure 10 and Figure 11 It can be seen that ω2 increases with the increase of the opening angle of the door 20, and ω2 is less than 180°; therefore, the length of BD increases with the increase of the opening angle α.

[0217] As door 20 rotates relative to box 10, point O3 moves in a circle with radius AO3 around point A, and the trajectory of point O3 is part of the fifth circle C5; point D moves in a circle with radius DO3 around point O3, and the trajectory of point D is part of the sixth circle C6. Points A, O3, and D form a triangle (ΔAO3D).

[0218] In ΔAO3D, according to the Law of Cosines, the length of AD satisfies the following formula:

[0219] AD 2 =AO3 2 +DO3 2 -2×AO3×DO3×cosω3 (3)

[0220] In the above formula (3), the distance AO3 between point A and point O3 remains constant; the distance DO3 between point D and point O3 remains constant; ω3 is ∠AO3D, refer to Figure 10 and Figure 11 It can be seen that ω3 increases with the increase of the opening angle of the door 20, and ω3 is less than 180°; therefore, the length of AD increases with the increase of the opening angle α.

[0221] In ΔBCD, the position of point B is fixed, and line segment CD is a fixed value. According to the above formula (1), the length of BC increases with the increase of the opening angle α; according to the above formula (2), the length of BD increases with the increase of the opening angle. The growth rates of the lengths of BC and BD are different, so that during the process of gradually opening the door 20 from the closed state, the door 20 can first move towards the front and inside of the cabinet 10, so that the door 20 moves away from the cabinet 40, and so that a sufficiently large safe distance is formed between the first door side edge 201 of the door 20 and the cabinet 40 to avoid collision. Then the door 20 moves towards the front and outside of the cabinet 10, so as to increase the opening angle of the door 20 and reduce the corresponding area of ​​the door 20 and the access opening 112, that is, reduce the obstruction of the access opening 112 by the door 20, so as to facilitate the taking and putting of items from the access opening 112.

[0222] Figure 11 The six-bar linkage formed by midpoints A, B, C, D, O1, O2, and O3 corresponds to the hinge structure when the door is in a closed state. Figure 11 The six-bar linkage formed by midpoints A, B, C', D', O1', O2', and O3' corresponds to the hinge structure when the door is opened to its maximum opening angle; Figure 11 In the equation, c' represents the trajectory of point C as it moves from point C to point C'. Figure 11 In this context, d' represents the trajectory of point D as it moves from point D to point D'.

[0223] like Figure 11 In the process of opening the door 20 from its closed state to its maximum opening angle, points C and D move first towards the front and inside of the box 10, and then towards the front and outside of the box 10. Since points C and D are relatively fixed to the door 20, this causes the entire door 20, as well as any point on the door, to move first towards the front and inside of the box 10, and then towards the front and outside of the box 10.

[0224] refer to Figure 11 The process of the door 20 opening from the closed state to the maximum opening angle may include a first opening stage and a second opening stage.

[0225] During the first opening phase, the hinge 30 can move the door 20 towards the front and inside of the cabinet 10, allowing the door 20 to bypass the cabinet side edge 404 of the cabinet 40 and form a sufficiently large safe distance between the door 20 and the cabinet 40 to avoid collision, thereby reducing the possibility of the door 20 interfering with the cabinet 40 during the opening process.

[0226] In the second opening stage, the hinge 30 can move the door 20 to the front of the box 10 and to the outside of the box 10, so as to increase the swing amplitude of the door 20 to the outside of the box 10, thereby increasing the opening angle of the door 20, for example, making the maximum opening angle of the door 20 greater than 90°, reducing the obstruction of the access opening 112 after the door 20 is opened, and reducing the obstruction of the door 20 to the retrieval of items in the storage room 111.

[0227] It should be noted that, since the first door side edge 201 and the second door side edge 202 are relatively fixed points on the door body 20, during the process of opening the door body 20 from a closed state to a larger opening angle, they first move towards the front and inward side of the cabinet 10, and then towards the front and outward side of the cabinet 10. Therefore, when the door body 20 is opened to a small angle, the first door side edge 201 and the second door side edge 202 both first move towards the front and inward side of the cabinet 10, and then towards the front and outward side of the cabinet 10. In this way, a sufficient safe distance can be quickly established between the first door side edge 201 and the second door side edge 202 and the cabinet 40 to avoid collision in the early stage of opening.

[0228] In some embodiments of this application, at least one technical problem that can be solved is how to avoid collision between the door 20 and the cabinet 40 during the opening process, and how to maintain a sufficiently large safe distance between the door 20 and the cabinet 40 to avoid collision. Figure 11As shown, within a certain opening angle range, such as when the opening angle is less than 90°, it is necessary to ensure that BC and BD have a large increase in length, and that the length of BC has a large growth rate relative to the length of BD, so that point C is the main trajectory point and point D is the auxiliary trajectory point. The position of the door 20 and the opening angle are mainly affected by the position of point C. Point D always follows the trajectory of point C and moves, and point D is always closer to the inside of the cabinet 10 relative to point C. That is, along the width direction of the cabinet 10, point D will not cross point C. In this way, as the opening angle gradually increases, point C can move towards the inside of the cabinet 10, and at the same time, point C can move towards the front of the cabinet 10 by a large margin, so that when the door 20 is opened at a small opening angle, the first door side edge 201 of the door 20 has a sufficiently large safe distance to avoid collision with the cabinet 40.

[0229] In some embodiments, reference Figure 12 As the door 20 opens from its closed state to its maximum opening angle, the movement trajectories of points C and D first move towards the front and inside of the box 10, and then towards the front and outside of the box 10. To minimize the obstruction of the access opening 112 by the door 20 when it is open to a large angle, the movement trajectories of points C and D need to move towards the outside of the box 10 as early and as much as possible. Figure 12 As shown, in this application, the movement trajectories C' and D' of points C and D move towards the outside of the box 10 earlier and more than the movement trajectories C0 and D0 of points C and D in related technologies. With a larger door opening angle, the obstruction of the door 20 to the loading and unloading opening 112 can be reduced, making it easier to take items out of the loading and unloading opening 112.

[0230] refer to Figure 12 If the trajectories of points C and D are made to move towards the outside of box 10 as early as possible and as much as possible, relative to related technologies, since the trajectories of points C and D are both offset to the outside by a certain amount, the rate of increase of ω4 (i.e. ∠ADC) or the maximum angle of ω4 (i.e. ∠ADC) in quadrilateral ABCD will increase.

[0231] In some embodiments of this application, reference is made to Figure 10 During the process of the door 20 opening from the closed state to the maximum opening angle, ω4 (i.e. ∠ADC) in quadrilateral ABCD first increases and then decreases, and the maximum angle of ω4 (i.e. ∠ADC) is not less than 30°.

[0232] In some embodiments of this application, the maximum angle of ω4 (i.e., ∠ADC) can be greater than 32°. With this setting, compared with related technologies, since the maximum angle of ω4 (i.e., ∠ADC) in quadrilateral ABCD is relatively increased, the trajectories of points C and D can be shifted to the outside by a certain amount, ensuring that the movement trajectories of points C and D move to the outside of the box 10 as early and as much as possible. Thus, with a larger door opening angle, the obstruction of the door 20 to the loading and unloading opening 112 can be reduced, making it easier to take items out of the loading and unloading opening 112.

[0233] In some embodiments of this application, reference is made to Figure 10 As the door 20 gradually opens from a closed state, the trend of ∠ADC(ω4) is that it first increases and then decreases.

[0234] In the initial stage of opening the door 20, ∠ADC(ω4) increases first, so that the length of BC increases at a relatively large rate relative to the length of BD. This makes point C the main trajectory point and point D the auxiliary trajectory point. The door 20 moves primarily by translation, with rotation as a secondary movement. The position and opening angle of the door 20 are mainly affected by the position of point C. Point D always follows the trajectory of point C and always stays close to the inside of the cabinet 10 relative to point C. That is, along the width of the cabinet 10, point D will not cross point C. In this way, as the opening angle gradually increases, point C can move towards the inside of the cabinet 10, and at the same time, point C can move towards the front of the cabinet 10 to a considerable extent. This ensures that when the door 20 is opened at a small angle, ∠ADC(ω4) tends to increase, and the first side edge 201 of the door 20 has a sufficiently large safe distance to avoid collision with the cabinet 40.

[0235] As the opening angle continues to increase, ∠ADC(ω4) gradually decreases. Point D becomes the primary trajectory point, and point C becomes the auxiliary trajectory point. The door 20 as a whole primarily rotates, with translation as a secondary movement. The position and opening angle of the door 20 are mainly influenced by the position of point D, while point C follows the trajectory of point D. The movement of point D towards the outside of the housing 10 causes point C to move towards the outside of the housing 10, allowing the door 20 to move significantly outward during this process. Furthermore, the door 20 gradually begins to fold outward, thus ∠ADC(ω4) decreases. The rear wall 210 of the door 20 gradually turns towards the front side of the front wall 220, increasing the distance between the door 20 and the access opening 112 along the width direction of the housing 10, thereby reducing the obstruction of the access opening 112 by the door 20.

[0236] For a refrigerator with a hinge 30 in the home furnishing field in the related technology, the maximum angle of ∠ADC(ω4) is 26°. When the door 20 is opened at a small opening angle, the speed of point C is slower. When the door 20 is opened at a small opening angle, the distance that point C moves to the front of the cabinet 10 is reduced, resulting in a smaller safe distance between the first door side edge 201 of the door 20 and the cabinet 40 to avoid collision.

[0237] In some embodiments of this application, the critical angle between the increase and decrease of the maximum angle (ω4) of ∠ADC(ω4) can be greater than 30°. For example, the maximum angle of ∠ADC(ω4) can be 30°, 30.5°, 31°, etc., so that point C can move to the outside of the cabinet 10 as early and as much as possible during the movement. This reduces the obstruction of the door 20 to the loading and unloading opening 112 when the door 20 is opened at a larger opening angle. At the same time, it greatly increases the distance that point C moves to the front of the cabinet 10. This ensures that when the door 20 is opened at a smaller opening angle, the first door side edge 201 of the door 20 has a sufficiently large safe distance to avoid collision with the cabinet 40.

[0238] In some embodiments of this application, in order to ensure that the trajectory of point C moves to the outside of the box 10 as early and as much as possible, and at the same time moves to the front of the box 10 by a large margin, it is necessary to make BC have a large length increase when the door 20 is opened at a certain angle.

[0239] refer to Figure 10 In ΔBO1C, to achieve a significant increase in the length of BC, the key lies in increasing the ratio of CO1 / BO1, or increasing the rate of increase of ω1 (∠BO1C). If the door 20 is opened to a certain angle, to ensure a significant increase in the length of BC, the ratio of CO1 / BO1 cannot be too small. In other words, compared to related technologies, the ratio of CO1 / BO1 needs to be increased so that within a certain opening angle of the door 20, such as an opening angle less than 90°, BC exhibits a significant increase in both length and speed.

[0240] In some embodiments of this application, the CO1 / BO1 ratio may be greater than 0.7.

[0241] In other words, if the ratio of CO1 / BO1 is less than 0.7, then the ratio of CO1 / BO1 is too small, and the length increase and speed increase of BC are small during the opening process of the door 20.

[0242] like Figure 13The diagram shows the movement trajectories of points O1 and C. The movement trajectory of point O1 is C1, and the movement trajectory of point C is c′. When ω1(∠BO1C) increases to ω1′, point C moves to point C′. At this point, the length difference H3 between BC′ and BC represents the increase in BC′ during the process of ω1(∠BO1C) increasing to ω1′.

[0243] Figure 13 In the diagram, trajectory c0 is the trajectory of point C after the ratio of CO1 / BO1 decreases. When ω1(∠BO1C) a When ω increases to ω1′, point C a Move to C a At this time, BC a ′ and BC a The length difference H4 between them is the length difference between BC and ω1 (∠BO1C) as ω1 increases to ω1′. a The increase.

[0244] Depend on Figure 13 It can be seen that in C a When O1 / BO1 is smaller than CO1 / BO1, when ω1(∠BO1C) increases to the same angle ω1′, BC a The increase in BC′, H4, is significantly smaller than the increase in BC′, H3. Furthermore, it can be understood that increasing the CO1 / BO1 ratio is equivalent to increasing C... a When O1 is increased to the length of CO1, the trajectory of c′ shifts as a whole. In other words, by relatively increasing the ratio of CO1 / BO1, it can be ensured that the trajectory of point C moves towards the outside of box 10 as early as possible and as much as possible.

[0245] In some embodiments of this application, the CO1 / BO1 ratio may be less than 0.9. (See reference...) Figure 5 and Figure 11 It can be seen that when hinge 30 is closed, the axis (center point C) of the sixth pivot 306 needs to be retracted within hinge 30. In order to avoid interference between the axis (center point B) of the sixth pivot 306 and the axis (center point B) of the fourth pivot 304, the length of CO1 needs to be shorter than the length of BO1. In order to retract the sixth pivot 306 into hinge 30 as much as possible, the ratio of CO1 / BO1 should not be too large, that is, less than 0.9, so as to ensure that the swing arm 320 retracts better.

[0246] Before the door 20 reaches a larger opening angle, such as 90°, point C has a greater speed increase relative to point D. This allows point C to move inward toward the inside of the cabinet 10 before CD reaches a point perpendicular to the front wall 121 of the cabinet. At the same time, point C can move forward toward the front of the cabinet 10 to a greater extent. This ensures that when the door 20 is opened to a smaller opening angle, the first side edge 201 of the door 20 has a sufficiently large safe distance to avoid collision with the cabinet 40.

[0247] In some embodiments of this application, the ratio of CO1 / BO1 can be increased by increasing CO1.

[0248] One way to increase CO1 is to move O1 a suitable length away from point C along CO1. However, this would reduce the distance between point O1 and AO3 when hinge 30 is in the closed state, making it easier for the third link 350 to interfere with the first link 330.

[0249] Another way to increase CO1 is to move O1 a suitable length along O1O2 towards O2, for example... Figure 14 Move point O1 along O1O2 towards the position O1' so that CO1' is greater than CO1 and the ratio of CO1' / BO1' is greater than the ratio of CO1 / BO1.

[0250] After point O1 is shifted to point O2 to the position of O1', in order to maintain the relationship of quadrilateral CO1O2D, point O2 needs to be shifted away from point O1 along O1O2 to the position of point O2', so that the length of DO2' is approximately equal to the length of CO1'; at the same time, point O3 needs to be shifted away from point A along AO3 to the position of point O3', so that the length of O2'O3' is approximately equal to the length of O2O3.

[0251] In some embodiments of this application, the ratio of DO2 / CO1 can be greater than 0.9 and less than 1.1. This ensures that during the gradual opening of the door 20 from a closed state, the quadrilateral CO1O2D maintains a roughly parallelogram-like relationship.

[0252] With points A and B remaining at their positions relative to mounting base 310, and points C and D remaining at their positions relative to swing arm 320, shifting point O1 to point O1' will increase the length of the fourth link 360. Shifting point O2 to point O2' will increase the length of the third link 350. Shifting point O3 to point O3' will increase the length of the first link 330. This increases the length of hinge 30 along the width direction of housing 10 when closed, effectively increasing the size of hinge 30.

[0253] Another technical problem that can be solved in this application embodiment is that when the door is at its maximum opening angle, the part of the door near its second door side edge will block the access opening of the storage room, causing inconvenience in retrieving and placing items. Figure 11 As shown, within a certain door opening angle range, such as when the door opening angle is greater than 90°, the length increase rate of BC needs to be relatively less than the length increase rate of BD, so that point D is the main trajectory point and point C is the auxiliary trajectory point. The position of the door 20 and the door opening angle are mainly affected by the position of point D. Point C moves along the trajectory of point D. The movement of point D to the outside of the box 10 drives point C to move to the outside of the box 10, so that the door 20 can move to the outside of the box 10 by a large margin during this process. The door 20 and the second door side edge 202 of the door 20 gradually begin to turn outward, and the rear wall 210 of the door 20 gradually turns to the front side of the front wall 220, so as to increase the distance between the second door side edge 202 of the door 20 and the pick-up and put-out opening 112 along the width direction of the box 10, and reduce the obstruction of the pick-up and put-out opening 112 by the door 20.

[0254] In some embodiments of this application, in order to ensure that the line CD connecting points C and D can move sufficiently outward from the box 10 before reaching a position perpendicular to the front wall 121 of the box (with an opening angle of 90°), so as to allow the hinge 30 to avoid the access port 112, the ratio of CO1 / BO1 can be increased. This reduces the distance that the movement trajectories of points C and D move inward from the box 10, thus increasing the distance that points C and D move outward from the box 10. This shifts the movement trajectories of points C and D outward from the box 10, thereby increasing the distance between the door 20 and the access port 112, reducing the obstruction of the access port 112 by the door 20 after it is opened, and increasing the maximum opening angle of the door 20.

[0255] Specifically, refer to Figure 12 and Figure 13 For a refrigerator with a hinge 30 in the home furnishing field in the relevant technology, before the ratio of CO1 / BO1 increases, the trajectory of point C is c0 and the trajectory of point D is d0.

[0256] In this embodiment, after the ratio of CO1 / BO1 increases, the trajectory of point C is c′ and the trajectory of point D is d′. It can be seen that c′ is offset to a greater extent towards the outside of the box 10 than c0, and d′ is offset to a greater extent towards the outside of the box 10 than d0. This allows points C and D to move sufficiently towards the outside of the box 10 before CD reaches a position perpendicular to the front wall 121 of the box. This increases the distance between the door 20 and the loading / unloading opening 112, reduces the obstruction of the loading / unloading opening 112 by the door 20, and increases the maximum opening angle of the door 20.

[0257] In some embodiments of this application, reference is made to Figure 5The mounting base 310 may have a side end face 312, which is opposite to the first door side wall 231, or after the refrigerator is embedded in the cabinet 40, the side end face 312 is opposite to the receiving side wall 402. The side end face 312 may be approximately perpendicular to the front wall 121 of the cabinet and approximately parallel to the side wall 123 of the cabinet.

[0258] After the mounting base 310 is installed onto the front wall 121 of the housing 10, point A is closer to the mounting surface 311 than point B, and point B is closer to the side end face 312 than point A. The angle between the line connecting points A and B and the side end face 312 is marked as θ. θ can be greater than or equal to 25° and less than or equal to 36°.

[0259] When the opening angle of door 20 is greater than or equal to 115°, AB and CD are parallel, and the opening angle of door 20 is 90° + θ. When AB and CD are parallel, the opening angle of door 20 can also be greater than 115°. When AB and CD are parallel, the opening angle of door 20 can also be greater than 120°, and so on. That is to say, θ can be greater than or equal to 25°; it can also be greater than 30° and less than or equal to 36°.

[0260] For example, when AB and CD are parallel, the opening angle of door 20 can be 116°, 120°, etc. Figure 15 In this design, when the door 20 opens at an angle of 118°, AB and CD are parallel. Thus, by increasing the angle θ, compared to related technologies, since the trajectories of points C and D are relatively offset to the outside of the housing 10 by a certain amount, and since point B is a fixed point, the obstruction of the door 20 to the access opening 112 can be reduced at a larger opening angle, facilitating the retrieval and placement of items through the access opening 112. Simultaneously, compared to related technologies, the movement trajectories of points C and D can move to the outside of the housing 10 earlier and more extensively, which also increases the maximum opening angle.

[0261] In this way, the opening angle of the door 20 can be increased when AB and CD are parallel. During the opening process of the door 20, before AB and CD are parallel, the distance that point C moves to the outside of the box 10 is increased, so that points C and D move to the outside of the box 10 fully, thereby increasing the distance between the door 20 and the pick-up and put-out opening 112 and reducing the obstruction of the pick-up and put-out opening 112 by the door 20.

[0262] When AB and CD are parallel, the opening angle of door 20 is greater than or equal to 115°, making CD parallel to AB later, increasing the distance that point D moves to the outside of box 10, or in other words, making point D move to the outside of box 10 as much as possible, so that the end of door 20 away from hinge 30 along its own width direction swings as far outward as possible from box 10, thereby reducing the obstruction of door 20 to the loading and unloading opening 112 of box 10.

[0263] When the included angle θ is less than 25°, when the door 20 is opened at a large opening angle, the movement trajectories of points C and D to the outside of the box 10 are too small, which is not conducive to reducing the obstruction of the door 20 to the loading and unloading opening 112.

[0264] When the included angle θ is greater than or equal to 25°, the movement trajectory of points C and D can shift to the outside of the box 10 when the door 20 is opened at a larger opening angle. This causes points C and D to shift to the outside of the box 10 as a whole when the door 20 is opened at a larger opening angle, which relatively increases the maximum opening angle of the door 20 and better reduces the obstruction of the pick-up and put-out opening 112 by the door 20.

[0265] It should be noted that, theoretically, when the hinge is at its maximum opening angle of 30 degrees, AB and CD are nearly parallel. For example... Figure 15 As shown, if AB and CD are parallel, and the opening angle of the door 20 is too large, that is, when θ is greater than 36°, it will delay the timing of point D and point C approaching the end of the trajectory. In other words, it is equivalent to AB and CD being close to parallel. If the hinge 30 is rotated clockwise as a whole, the door will move too much outward when it is at its maximum opening angle, which is not conducive to the stability and reliability of the door.

[0266] Meanwhile, if the included angle θ is too large, greater than 36°, with the length of AO3 remaining constant, the distance that point O3 extends inward toward the inside of the cabinet 10 will increase, resulting in an increase in the overall size of the hinge 30 along the width direction X of the cabinet 10, thus reducing the refrigerator's aesthetic appeal. If the included angle θ is less than or equal to 36°, with the length of AO3 remaining constant, point O3 can relatively contract outward toward the outside of the cabinet 10, improving the compactness of the hinge 30 and reducing its size along the width direction X of the cabinet 10, thereby enhancing the refrigerator's aesthetic appeal.

[0267] In some embodiments of this application, reference is made to Figure 5 When the door 20 is in the closed state, AO3 can retract to be approximately parallel to the mounting surface 311. This allows the hinge 30 to retract sufficiently when the door 20 is in the closed state, thereby reducing the lever arm of the hinge 30 for supporting the door 20 and enabling the hinge 30 to reliably support the weight of the door 20.

[0268] In some embodiments of this application, reference is made to Figure 12When hinge 30 is in the closed state, points B, O2, and O3 can be approximately collinear. Thus, when door 20 is closed, points A, B, and O3 form a stable triangle. The position of point O3 relative to point A is not easily changed, making it difficult for the first link 330 to rotate relative to the mounting base 310. The position of point O2 relative to point B is also not easily changed, making it difficult for the third link 350 to rotate relative to the mounting base 310. This allows hinge 30 to remain in the closed state, improving the stability of door 20 when closed.

[0269] refer to Figure 12 When the door 20 is in the closed state, the hinge 30 is also in the closed state. At this time, the line AO3 connecting point A and point O3 is approximately parallel to the mounting surface 311. The perpendicular line from point B to AO3 and the extension of O3A intersect at point F. It can be seen that ΔABF and ΔBFO3 are both right triangles.

[0270] In right triangle BFO3, according to the Pythagorean theorem, BF, BO3, and FO3 satisfy the following formula:

[0271]

[0272] Since point F lies on the extension of O3A, therefore,

[0273] FO3=AO3+AF (5)

[0274] Since points B, O2, and O3 are approximately collinear, therefore,

[0275] BO3=BO2+O2O3 (6)

[0276] In right triangle ABF, AF, BF, and AB satisfy the following formula:

[0277] AF=AB×sinθ (7)

[0278] BF=AB×cosθ (8)

[0279] Based on the above formulas (4)-(8), it can be deduced that when the door 20 is in the closed state, AO3 is approximately parallel to the mounting surface 311, and when the door 20 is closed, the following formula is satisfied:

[0280]

[0281] At this time, AO3 and the mounting surface 311 can be approximately parallel, so that the lever arm of the hinge 30 for supporting the door 20 is small enough, and the hinge 30 can retract sufficiently inward, thereby reducing the moment of the door 20 sinking under gravity and reducing the moment of the door 20 twisting under gravity. Furthermore, points B, O2, and O3 are made as collinear as possible, so that point O2 is on the side of triangle ABO3, so that point O2 is located near the side of the triangle structure formed by the fixed support points A and B for supporting the door 20 and the farthest support point O3, thereby making the lever arm between point O2 and the equivalent support points in the triangle structure small enough.

[0282] Based on the above formulas (4)-(8), we can also derive...

[0283]

[0284] When door 20 is in the closed state, AO3 can be greater than 77, that is...

[0285]

[0286] For refrigerators with hinges in the home furnishing field in related technologies, AO3 does not exceed 76, resulting in a small sum of AO3+DO3. When the door 20 is opened at a large angle, such as when the opening angle is greater than 90°, the movement of point D to the outside of the cabinet 10 is small, which makes it easy for the door 20 to block the access opening 112, which is not conducive to taking out or putting in items through the access opening 112.

[0287] In some embodiments of this application, AO3 is greater than 77. For example, AO3 can be 78, 78.5, 79, or larger. Thus, as AO3 increases, the sum of AO3 + DO3 increases. When the door 20 is opened at a large angle, such as an opening angle greater than 90°, point D can move significantly outward from the box 10. This allows the door 20 to move away from the access opening 112 when the door is opened at a large angle, reducing the obstruction of the access opening 112 and facilitating the retrieval and placement of items through the access opening 112.

[0288] In some embodiments of this application, reference is made to Figure 12 Point B is translated 8cm outward along the positive direction of the width X of the box 10, and then translated 18cm forward along the positive direction of the depth Y of the box 10. The virtual point position after the translation of point B is marked as point E. Under normal circumstances, the marked point E corresponds to the position of the first door side edge 201 when the door 20 is closed.

[0289] As the door 20 gradually opens from a closed state, the length of the line connecting EC first decreases and then increases. Specifically, as the door 20 gradually opens from a closed state to the first opening angle, the length of EC gradually decreases; as the door opens from the first opening angle to a larger angle, the length of EC gradually increases. For example, the first opening angle can be 30° or 35°.

[0290] In some embodiments of this application, during the process of the door 20 gradually opening from a closed state to a first opening angle, such as within the first opening angle of 30°, the reduction in EC length Δec can be greater than 3mm and less than 6mm.

[0291] In some embodiments of this application, the reduction in EC length Δec can be greater than 10% and less than 20% of EC length ec1 when the door 20 is in the closed state.

[0292] In some embodiments of this application, the EC length gradually increases as the door opens from a first opening angle to its maximum angle.

[0293] For refrigerators in the related technology that have a hinge 30 for home use, during the process of the door 20 gradually opening from a closed state, during the process of opening to a small opening angle, such as within 30°, for example... Figure 12 In the process of point C moving from C to C0′, the length of EC remains essentially constant, which is equivalent to point C undergoing a circular motion around point E. After the door opening angle increases to a certain angle, for example... Figure 12 During the process of point C moving from C0′ to C0, EC begins to gradually increase.

[0294] In this embodiment, as the door 20 gradually opens from a closed state, the length of EC first decreases and then increases as the opening angle gradually increases. The length of EC first gradually decreases when the opening angle is relatively small, for example... Figure 12 In the process of point C moving from C to C″, the length of EC gradually decreases to reduce the distance point C moves inward toward the inside of box 10. (Reference) Figure 12 Compared to refrigerators with hinges 30 in the home appliance field in related technologies, the embodiments of this application can increase the distance that point C moves outward from the cabinet 10, causing the movement trajectory of point C to shift outward from the cabinet 10, thereby increasing the distance between the door 20 and the access opening 112. During the door opening process, the obstruction of the access opening 112 by the door 20 is relatively reduced at any angle. In addition, the shift of the movement trajectory of point C outward from the cabinet 10 causes the door 20 to be more biased towards the outside of the cabinet 10 when it is opened to the maximum opening angle, thereby increasing the maximum opening angle of the door 20.

[0295] For refrigerators with hinges 30 in the home appliance sector in related technologies, the minimum length of EC is greater than 31cm.

[0296] In some embodiments of this application, during the gradual opening of the door 20 from a closed state, the minimum length of EC can be less than or equal to 30cm. For example, the minimum length of EC can be 27cm, 27.5cm, 28cm, 28.5cm, 29cm, etc. Compared with refrigerators with hinges 30 in the home furnishing field in related technologies, this can reduce the distance that point C moves inward toward the inside of the cabinet 10 and increase the distance that point C moves outward toward the outside of the cabinet 10. This shifts the movement trajectory of point C toward the outside of the cabinet 10, thereby increasing the distance between the door 20 and the access opening 112 and reducing the obstruction of the access opening 112 by the door 20. In addition, the shift of the movement trajectory of point C toward the outside of the cabinet 10 makes the door 20 more biased toward the outside of the cabinet 10 when it is opened to the maximum opening angle, thereby increasing the maximum opening angle of the door 20.

[0297] When the door 20 is closed, the length of EC is denoted as ec1. When the door 20 is opened and EC decreases, the difference between the length of EC and the length of ec1 is the decrease in EC length Δec. The decrease in EC length Δec should not be too large, such as less than 6mm; or less than 20% of the EC length ec1 when the door 20 is closed. Although the EC length gradually decreases when the door is opened at a small angle, which helps the movement trajectory of point C to shift to the outside of the cabinet 10 and increases the distance between the door 20 and the access port 112, if the decrease in EC length Δec is too large, the minimum distance between the first door side edge 201 and the cabinet 40 will decrease during the small opening angle of the door 20. Since the actual safe distance between the first door side edge 201 and the cabinet 40 is affected by the position of the cabinet 40 and the front wall 220 of the refrigerator door when the refrigerator is installed, a sufficient safe distance needs to be reserved.

[0298] In some embodiments of this application, reference is made to Figure 12When the door 20 is in the closed state, the hinge 30 is also in the closed state. Points B, C, and O1 can be set collinearly. At this time, BO1 can be approximately equal to the sum of BC and CO1. When BO1 remains unchanged, when BC decreases relatively, CO1 can increase relatively, thereby increasing the ratio of CO1 / BO1. This makes the length growth rate of BC greater than that of BD within a certain opening angle range, such as when the opening angle is less than 90°. As the opening angle gradually increases, point C can move inward toward the inside of the cabinet 10. At the same time, point C can move forward toward the front of the cabinet 10 to a large extent, so that when the door 20 is opened at a small opening angle, the first door side edge 201 of the door 20 has a sufficiently large safe distance to avoid collision with the cabinet 40.

[0299] In some embodiments of this application, the ratio of BC / AB can be less than or equal to 0.6, so that BC is relatively reduced, and within a certain opening angle range, such as when the opening angle is less than 90°, the length growth rate of BC is greater than the length growth rate of BD. As the opening angle gradually increases, point C can move inward toward the inside of the cabinet 10, and at the same time, point C can move forward toward the front of the cabinet 10 by a large margin, so that when the door 20 is opened at a small opening angle, the first door side edge 201 of the door 20 has a sufficiently large safe distance to avoid collision with the cabinet 40.

[0300] For refrigerators with hinges used in the home furnishing field in related technologies, when points B, C, and D are collinear, the opening angle of the door 20 is approximately 60°. At this time, when points B, C, and D are collinear at a smaller opening angle, the distance that point C moves to the outside of the cabinet 10 is smaller, resulting in the door 20 obstructing the access opening 112 to a greater extent.

[0301] In some embodiments of this application, points C and D drive the door 20 to rotate, so that when the door 20 is at a large opening angle, the degree to which the door 20 obstructs the access opening 112 is reduced. For example... Figure 11 As shown, points C and D move along similar elliptical trajectories. When the opening angle of the door 20 is small, relative to the box 10, point C is closer to the outside of the box 10 than point D. Both points C and D move outwards from the box 10 simultaneously, and point D's relative movement amplitude is greater than that of point C. In other words, point C moves outwards from the box 10 forward, and point D moves outwards from the box 10 backwards. If the outward movement of point C in the X-axis direction is accelerated, the timing of point D approaching point C can be relatively delayed. This allows points C and D to move further outwards at the same opening angle, thus relatively reducing the obstruction of the door 20 to the access opening 112 at a larger opening angle, facilitating the retrieval and placement of items through the access opening 112.

[0302] In some embodiments of this application, during the opening process of the door 20, when points B, C, and D are collinear, the opening angle of the door 20 can be greater than 70°. In some embodiments of this application, when points B, C, and D are collinear, the opening angle of the door 20 can also be greater than 80°, greater than 85°, or greater than 90°.

[0303] For example Figure 16 When points B, C, and D become collinear, the opening angle of door 20 is 80°. Thus, the later the points B, C, and D become collinear, the larger the corresponding opening angle. By relatively delaying the point B, C, and D becoming collinear, the movement of point C towards the outside of box 10 in the X-axis direction is relatively accelerated. In other words, this increases the opening angle of door 20 when points B, C, and D are collinear. Before points B, C, and D become collinear, the distance point C moves towards the front of box 10 is increased, and the distance point C moves towards the outside of box 10 is also increased, thereby reducing the degree to which door 20 obstructs the access opening 112.

[0304] In some embodiments of this application, when points B, C, and D are collinear, the opening angle of the door 20 is less than 110°. It should be noted that when points B, C, and D are collinear, the larger the opening angle of the door 20, the later the point of collinearity occurs, and the greater the outward movement of point C in the X-axis direction. If the opening angle of the door 20 is too large when points B, C, and D are collinear, the door 20 will move too far outward from the housing 10, which is detrimental to the stability and reliability of the door 20.

[0305] In some embodiments of this application, reference is made to Figure 17 When the opening angle of door 20 is 90°, CD is perpendicular to the front wall 121 of the box. Point C is more biased towards the outside of box 10 than point A. In other words, the distance H1 between the orthographic projection point C1 of point C on the front wall 121 and the orthographic projection point O31 of point O3 on the front wall 121, and the distance H2 between the orthographic projection point A1 of point A on the front wall 121 and the orthographic projection point O31 of point O3 on the front wall 121, make H1 greater than H2. That is, when the opening angle of door 20 is 90°, in the width direction X of box 10, point C moves to the outside of box 10 to a position past point A, so that before CD reaches the perpendicularity of the front wall 121, points C and D move sufficiently to the outside of box 10, so that door 20 can avoid the loading and unloading opening 112 of box 10.

[0306] In some embodiments of this application, when the opening angle of the door 20 is 90°, CD is perpendicular to the front wall 121 of the box, and point C is more biased towards the inside of the box 10 than point B. In other words, the orthographic projection of point C on the front wall 121 of the box is located between the orthographic projection of point A on the front wall 121 of the box and the orthographic projection of point B on the front wall 121 of the box.

[0307] In some embodiments of this application, when the opening angle of the door 20 is 90°, CD is perpendicular to the front wall 121 of the box, and points B, C and D can be collinear.

[0308] In some embodiments of this application, when the opening angle of the door 20 is 90°, CD is perpendicular to the front wall 121 of the box, and point C is more biased towards the outside of the box 10 than point B. In other words, the distance between the orthographic projection of point C on the front wall 121 and the orthographic projection of point O3 on the front wall 121 is greater than the distance between the orthographic projection of point B on the front wall 121 and the orthographic projection of point O3 on the front wall 121. That is, when the opening angle of the door 20 is 90°, in the width direction X of the box 10, point C moves outwards towards the outside of the box 10 to a position past point B, so that before CD reaches a position perpendicular to the front wall 121, points C and D move sufficiently outwards towards the outside of the box 10, allowing the door 20 to further avoid the loading / unloading opening 112 of the box 10.

[0309] It should be noted that when the door 20 opens at a 90° angle, CD is perpendicular to the front wall 121 of the refrigerator. In normal refrigerator use, when the door is open at a 90° angle, point C is more inclined to the outside of the refrigerator 10 than point A, or point C is more inclined to the outside of the refrigerator 10 than point B. This ensures that when CD is perpendicular to the front wall 121, points C and D move sufficiently outward from the refrigerator 10, reducing the obstruction of the door 20 from the access opening 112 of the refrigerator 10.

[0310] In some embodiments of this application, during the process of opening the door 20 from a closed state to a large angle, such as when the opening angle of the door 20 is greater than 90°, when points A, C, and D are collinear, the opening angle of the door 20 can be greater than 98°. For example, when points A, C, and D are collinear, the opening angle of the door 20 can also be greater than 98°, or greater than 102°, etc. Figure 18 In the example, when points A, C, and D are collinear, the opening angle of door 20 is 100°.

[0311] When points A, C, and D are collinear, the opening angle of door 20 is larger. This relatively delays the time when points A, C, and D become collinear, and relatively accelerates the movement of point C towards the outside of box 10 in the X-axis direction before they become collinear. In other words, it increases the opening angle of door 20 when points A, C, and D are collinear, increases the distance point C moves towards the front of box 10 before they become collinear, and also increases the distance point C moves towards the outside of box 10, thereby reducing the degree to which door 20 obstructs the access opening 112. In this way, on the one hand, the opening angle of the door 20 can be increased when points A, C, and D are collinear. During the opening process of the door 20, before points A, C, and D are collinear, the distance that point C moves to the outside of the box 10 is increased, so that points C and D move to the outside of the box 10, thereby increasing the distance between the door 20 and the pick-up and put-out opening 112 and reducing the obstruction of the pick-up and put-out opening 112 by the door 20.

[0312] When points A, C, and D are collinear, the opening angle of the door 20 is greater than or equal to 98°, which makes points A, C, and D collinear and also increases the distance that point D moves to the outside of the box 10. In other words, it also makes point D move to the outside of the box 10 as much as possible, so that the end of the door 20 away from the hinge 30 along its own width direction swings as far outward as possible from the box 10, thereby reducing the obstruction of the door 20 to the loading and unloading opening 112 of the box 10.

[0313] In some embodiments of this application, when points A, C, and D are collinear, the opening angle of the door 20 is less than 120°. It should be noted that when points A, C, and D are collinear, the larger the opening angle of the door 20, the later the point of collinearity occurs, and the greater the outward movement of point C in the X-axis direction. If the opening angle of the door 20 is too large when points A, C, and D are collinear, the outward movement of the door will be excessive, resulting in excessive outward movement at larger opening angles, which is detrimental to the stability and reliability of the door support.

[0314] 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.

[0315] 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: The utility model relates to a cabinet door hinge, including: A cabinet (10) is structured with storage room (111), and the front side of storage room (111) has the access opening (112) of taking and placing, and the front side of cabinet (10) has cabinet front wall (121); Door body (20) is used for opening or closing access opening (112); Hinge (30) connects cabinet (10) and door body (20), and hinge (30) includes: Mounting seat (310) is arranged in cabinet front wall (121); Swing arm (320) is arranged in door body (20); First connecting rod (330) is pivotally connected with mounting seat (310) through first pivot shaft (301) at first end; Second connecting rod (340) is pivotally connected with swing arm (320) through second pivot shaft (302) at first end, and the second end is pivotally connected with the second end of first connecting rod (330) through third pivot shaft (303); Third connecting rod (350) is pivotally connected with mounting seat (310) through fourth pivot shaft (304) at first end, and the second end is pivotally connected with second connecting rod (340) through fifth pivot shaft (305); Fourth connecting rod (360) is pivotally connected with swing arm (320) through sixth pivot shaft (306) at first end, and the second end is pivotally connected with third connecting rod (350) through seventh pivot shaft (307); The axis point of first pivot shaft (301) is defined as point A, the axis point of second pivot shaft (302) is defined as point D, and the axis point of sixth pivot shaft (306) is defined as point C, and point A, point D and point C form included angle ADC; During the process that door body (20) is gradually opened from closed state, included angle ADC increases first and then decreases, and the maximum angle of included angle ADC is greater than 30 DEG.

2. The refrigerator according to claim 1, characterized in that, The maximum angle of included angle ADC is greater than 32 DEG.

3. The refrigerator according to claim 1, characterized in that, The axis point of fourth pivot shaft (304) is defined as point B, the axis point of seventh pivot shaft (307) is defined as point O1, the distance between point C and point O1 is CO1, and the distance between point B and point O1 is BO1; The ratio of CO1 / BO1 is greater than 0.7 and less than 0.

9.

4. The refrigerator according to claim 3, characterized in that, The axis point of fifth pivot shaft (305) is defined as point O2, the distance between point D and point O2 is DO2, and the distance between point C and point O1 is CO1; The ratio of DO2 / CO1 is greater than 0.9 and less than 1.

1.

5. The refrigerator according to claim 1, characterized in that, Mounting seat (310) has mounting surface (311) and side end surface (312); Mounting surface (311) is towards cabinet front wall (121) and parallel with cabinet front wall (121) when door body (20) is in closed state; Side end surface (312) is located in the front side of cabinet front wall (121) and perpendicular to mounting surface (311); The axis point of fourth pivot shaft (304) is defined as point B; Point A is closer to mounting surface (311) than point B, and point B is closer to side end surface (312) than point A; An angle defined by a line AB connecting point A and point B and the side end face (312) is defined as an angle θ; The angle θ is greater than or equal to 25° and less than or equal to 36°.

6. The refrigerator according to any one of claims 1 to 5, characterized in that, A point B is defined as an axis point of the fourth pivot shaft (304), a point O1 is defined as an axis point of the seventh pivot shaft (307), a point O2 is defined as an axis point of the fifth pivot shaft (305), a point O3 is defined as an axis point of the third pivot shaft (303), a distance between point A and point B is defined as AB, a distance between point A and point O3 is defined as AO3, a distance between point B and point O2 is defined as BO2, and a distance between point O2 and point O3 is defined as O2O3; When the door body (20) is in a closed state, the following is satisfied: 。 7. The refrigerator according to claim 6, characterized in that When the door body (20) is in a closed state, the following is satisfied: 。 8. The refrigerator according to claim 1, characterized in that, The door body (20) has a door front wall (220) and a first door side wall (231); The door front wall (220) is located on a front side of the door body (20) when the door body (20) is in a closed state; The first door side wall (231) is located on a side of the door body (20) close to the hinge (30) along a width direction of the door body (20), and an intersection of the first door side wall (231) and the door front wall (220) forms a first door side edge (201); When the door body (20) is in a closed state, a position of the first door side edge (201) is defined as point E, and a length between point E and point C is defined as ec1; The minimum length of the EC is defined as ec min ; The length of the EC is first decreased from the ec1 to the ec min , and then gradually increased from the ec min .

9. The refrigerator according to claim 1, characterized in that, A point B is defined as an axis point of the fourth pivot shaft (304), the point B is translated 8 cm outward along a width direction of the cabinet (10), and then translated 18 cm forward along a depth direction of the cabinet (10), a virtual point position of the point B after translation is marked as point E, and a length between the point E and the point C is defined as ec1; The minimum length of the EC is defined as ec min ; The length of the EC is first decreased from the ec1 to the ec min and then gradually increased from the ec min during the process of gradually opening the door body (20) from the closed state.

10. The refrigerator according to claim 8 or 9, characterized in that, The difference between the ec1 and the ec min is defined as Δec, Δec being greater than 3 mm and less than 6 mm.

11. The refrigerator according to claim 8 or 9, characterized in that, The difference between said ec1 and said ec min is defined as Δec, Δec being greater than 10% ec1, and less than 20% ec1.

12. The refrigerator according to any one of claims 1-5, characterized in that, A point B is defined as an axis point of the fourth pivot shaft (304); When the point B, the point C, and the point D are collinear, an opening angle of the door body (20) is greater than 70°.

13. The refrigerator according to any one of claims 1-5, characterized in that, A point B is defined as an axis point of the fourth pivot shaft (304); When the point B, the point C, and the point D are collinear, an opening angle of the door body (20) is greater than 80°.

14. The refrigerator according to any one of claims 1-5, characterized in that, A point B is defined as an axis point of the fourth pivot shaft (304); When an opening angle of the door body (20) is 90°, a projection point of the point C on the cabinet front wall (121) is located between a normal projection point of the point A on the cabinet front wall (121) and a normal projection point of the point B on the cabinet front wall (121).

15. The refrigerator according to any one of claims 1-5, characterized in that, A point B is defined as an axis point of the fourth pivot shaft (304); When an opening angle of the door body (20) is 90°, the point B, the point C, and the point D are collinear.

16. The refrigerator according to any one of claims 1-5, characterized in that, A point B is defined as an axis point of the fourth pivot shaft (304); When an opening angle of the door body (20) is 90°, a distance between a normal projection point of the point C on the cabinet front wall (121) and a normal projection point of the point A on the cabinet front wall (121) is greater than a distance between a normal projection point of the point B on the cabinet front wall (121) and a normal projection point of the point A on the cabinet front wall (121).

17. The refrigerator according to any one of claims 1-5, characterized in that, In the process that the door body (20) gradually opens from the closed state, when points A, C and D are collinear, the opening angle of the door body (20) is greater than or equal to 98° and less than 120°.

18. The refrigerator according to any one of claims 1-5, characterized in that, In the process that the door body (20) gradually opens from the closed state, when points A, C and D are collinear, the opening angle of the door body (20) is greater than or equal to 102° and less than 120°.

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