Hinge device and refrigeration equipment

Abstract

The utility model provides a hinge device and refrigeration equipment, the hinge device comprises a fixed hinge piece, a movable hinge piece, a connecting rod assembly connecting the movable hinge piece and the fixed hinge piece and a door closer arranged on the connecting rod assembly, the fixed hinge piece is provided with a first hinge point and a second hinge point, and the movable hinge piece is provided with a third hinge point and a fourth hinge point; the connecting rod assembly comprises a first connecting rod, a second connecting rod, a third connecting rod and a fourth connecting rod which are hinged to a first hinge point, a second hinge point, a third hinge point and a fourth hinge point respectively. The connecting rod assembly has a folded state and an unfolded state; the first connecting rod and the second connecting rod are single-layer connecting rods, and the door closer is arranged in the fourth connecting rod. The door closer is arranged in the fourth connecting rod, and the first connecting rod and the second connecting rod are single-layer connecting rods. The hinge device has the automatic door closing effect and meanwhile guarantees the small thickness.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of refrigeration equipment, in particular to a hinge device and refrigeration equipment. BACKGROUND

[0002] With the development of society and the gradual improvement of living quality, people's demand for the aesthetic appearance of refrigeration equipment is increasingly prominent. Embedding refrigeration equipment in external environment components, such as cabinets, walls, etc., that is, forming embedded refrigeration equipment to realize the home decoration mode of uniform decoration style has become popular.

[0003] Some existing refrigeration equipment adopts a hinge device with a connecting rod assembly to movably connect a door body to a cabinet. During the opening process of the door body relative to the cabinet, the connecting rod assembly is unfolded. Under the drive of the connecting rod assembly, the door body rotates while translating along a preset track. The structure is simple and can avoid interference between the door body and the external environment component. With the improvement of aesthetics, the thickness of the hinge device tends to be thinner and thinner. However, due to the size of the connecting rod, it is difficult to ensure that the door closer mechanism is retained when the hinge device is thin. SUMMARY

[0004] The purpose of the present application is to provide a hinge device and refrigeration equipment. The hinge device is provided with a door closer, and the first connecting rod and the second connecting rod are single-layer connecting rods. The hinge device with the automatic door closing function reduces the thickness of the hinge device, and solves the problem that it is difficult to have a thin hinge device with an automatic door closing function in the prior art.

[0005] To achieve one of the above-mentioned purposes, an embodiment of the present application provides a hinge device, which comprises a fixed hinge part for fixing to a cabinet, a movable hinge part for fixing to a door body, a connecting rod assembly connecting the movable hinge part to the fixed hinge part, and a door closer provided on the connecting rod assembly. The fixed hinge part is provided with a first hinge joint and a second hinge joint, and the movable hinge part is provided with a third hinge joint and a fourth hinge joint.

[0006] The connecting rod assembly comprises a first connecting rod hinged to the first hinge joint, a second connecting rod hinged to the second hinge joint, a third connecting rod hinged to the third hinge joint, and a fourth connecting rod hinged to the fourth hinge joint. One end of the second connecting rod away from the second hinge joint is hinged to a fifth hinge joint with one end of the fourth connecting rod away from the fourth hinge joint. The second connecting rod has a sixth hinge joint between the second hinge joint and the fifth hinge joint. One end of the third connecting rod away from the third hinge joint is hinged to the sixth hinge joint. The third connecting rod has a seventh hinge joint between the third hinge joint and the sixth hinge joint. One end of the first connecting rod away from the first hinge joint is hinged to the seventh hinge joint. The connecting rod assembly has a folded state and an unfolded state.

[0007] The first link and the second link are single-layer links, and the door closer is arranged in the fourth link.

[0008] In one embodiment of the present application, the fixed hinge part comprises a first fixed plate arranged to be fixed to the cabinet, a first hinge plate connected to the first fixed plate and arranged to connect the link assembly, and the first hinge plate is perpendicular to the first fixed plate; the thickness of the hinge device in the direction perpendicular to the first hinge plate is 17.5-18.5 mm.

[0009] In one embodiment of the present application, the thickness of the hinge device in the direction perpendicular to the first fixed plate is 41-43 mm when the link assembly is in the folded state.

[0010] In one embodiment of the present application, the first hinge plate has a first edge away from the movable hinge part, and the first edge is parallel to the plane in which the opening side of the cabinet is located; the first hinge plate is provided with a first hinge point and a second hinge point arranged to be rotationally connected to the link assembly, and the acute angle between the extension line of the line connecting the first hinge point and the second hinge point and the first edge is 33.5°.

[0011] In one embodiment of the present application, the hinge device has a rotating end; the first hinge plate has a second edge close to the rotating end, the distance between the second hinge point and the first edge is less than the distance between the first hinge point and the first edge, and the distance between the second hinge point and the second edge is greater than the distance between the first hinge point and the second edge.

[0012] In one embodiment of the present application, the movable hinge part comprises a second hinge plate arranged to connect the link assembly, the second hinge plate has a third edge away from the fixed hinge part, and the third edge is parallel to the first edge when the link assembly is in the folded state; the second hinge plate is provided with a third hinge point and a fourth hinge point arranged to be rotationally connected to the link assembly, and the included angle between the extension line of the line connecting the third hinge point and the fourth hinge point and the third edge is 1°.

[0013] In one embodiment of the present application, the second hinge plate has a fourth edge close to the rotating end, the distance between the third hinge point and the third edge is less than the distance between the fourth hinge point and the third edge, and the distance between the third hinge point and the fourth edge is less than the distance between the fourth hinge point and the fourth edge.

[0014] In one embodiment of the present application, the fourth link is provided with an elongated hole, the second link is provided with a cam at one end close to the fifth hinge point, and the door closer comprises:

[0015] The sliding member is slidably connected with the fourth connecting rod through the long strip-shaped hole;

[0016] The elastic member has one end fixed relative to the fourth connecting rod and the other end abutting against the sliding member, and the cam pushes against the sliding member to deform the elastic member under stress during the switching of the connecting rod assembly from the folded state to the unfolded state.

[0017] In one of the embodiments of the present application, the sliding member is provided with a connecting column, and the connecting column passes through the long strip-shaped hole, and the length direction of the long strip-shaped hole is consistent with the length direction of the elastic member.

[0018] The embodiment of the present application further provides a refrigeration equipment, which comprises a cabinet, a door body used for opening or closing the cabinet, and a hinge device as described above connecting the cabinet and the door body.

[0019] The one or more technical solutions provided by the present application have at least the following technical effects or advantages:

[0020] In the hinge device provided by the present application, the first connecting rod and the second connecting rod are arranged as single-layer connecting rods, so that the thickness of the hinge device as a whole can be reduced, and the door closer is arranged on the fourth connecting rod, so that the original automatic door closing function of the hinge device is retained. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a cooperation schematic view of the refrigeration equipment in the embodiment of the present application and part of a cabinet.

[0022] Figure 2 is Figure 1 is a structural schematic view of the hinge device in the embodiment of the present application.

[0023] Figure 3 is Figure 2 is an explosion view of the hinge device in the embodiment of the present application when the hinge device is opened by 45°.

[0024] Figure 4 is Figure 3 is a front view of the hinge device in the embodiment of the present application.

[0025] Figure 5 is Figure 4 is a sectional view along line A-A in the embodiment of the present application.

[0026] Figure 6 is Figure 2 is a structural schematic view of the hinge device in the embodiment of the present application when the hinge device is opened to 45°.

[0027] Figure 7 is Figure 2 is a structural schematic view of the hinge device in the embodiment of the present application when the hinge device is opened to 90°.

[0028] Figure 8 is Figure 2 is a structural schematic view of the hinge device in the embodiment of the present application when the hinge device is opened to the maximum angle.

[0029] 100, refrigerator; 200, cabinet;

[0030] 1, cabinet; 2, door;

[0031] 3, hinge device; 31, fixed hinge part; 311, first fixed plate; 312, first hinged plate; 3121, first edge; 3122, second edge; 32, movable hinge part; 321, second fixed plate; 322, second hinged plate; 3221, third edge; 3222, fourth edge;

[0032] 33, link assembly; 331, first link; 332, second link; 3321, cam; 333, third link; 334, fourth link; 3341, third hinged plate; 3342, long strip-shaped hole;

[0033] 4, door closer; 41, sliding part; 411, connecting column; 42, spring; 43, fixed block; 44, guide cylinder. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0035] The terms such as "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like used herein to indicate spatial relative positions are for the purpose of facilitating illustration to describe the relationship of one unit or feature relative to another unit or feature as shown in the drawings. The spatial relative position terms can be intended to include different orientations of the device in use or in operation except the orientation shown in the drawings.

[0036] For example, if the device in the drawing is turned over, the unit described as being "below" or "under" the other unit or feature will be "above" the other unit or feature. Therefore, the exemplary term "below" can encompass both the upward and downward orientations. The device can be oriented in other ways (rotated 90 degrees or other orientations) and the spatially relative descriptors used herein interpreted accordingly.

[0037] In the description of the present application, it should be noted that unless specifically defined and limited, the terms "mounting", "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0038] And it should be understood that although the terms first, second, etc. can be used herein to describe various elements or structures, these described objects should not be limited by these terms. These terms are only used to distinguish these described objects from each other. For example, a first hinge point can be called a second hinge point, and similarly a second hinge point can also be called a first hinge point, which does not depart from the scope of protection of the present application.

[0039] The embodiment of the present application provides a hinge device 3, which can be used for a refrigeration equipment 100, such as Figure 1 In the refrigeration equipment 100, the refrigeration equipment 100 comprises a cabinet 1, a door body 2 used for opening or closing the cabinet 1, and the aforementioned hinge device 3 connecting the cabinet 1 and the door body 2. The hinge device 3 is used to movably connect the door body 2 with the cabinet 1, so that the door body 2 can be switched between a closed state and an open state, and the door body 2 can move according to a preset track while rotating, so as to avoid interference between the door body 2 and the cabinet 200. Therefore, the embodiment of the present application also provides a refrigeration equipment 100 provided with the aforementioned hinge device 3.

[0040] Figure 1 A part of the refrigeration equipment 100 embedded in the cabinet 200 is shown in the figure, wherein only the cabinet 200 on one side is shown. It can be understood that in actual installation, the refrigeration equipment 100 is entirely embedded in the cabinet 200. Of course, it can be understood that the refrigeration equipment 100 is not necessarily embedded in the cabinet 200, but can also be embedded in a wall, or used alone. The hinge device 3 provided by the present application is not necessarily used for the refrigeration equipment 100, but can also be used for other equipment having a cabinet 1 and a door body 2. The present application takes the refrigeration equipment 100 as an example, and takes the direction of the cabinet 1 towards the door body 2 as "front" when the refrigeration equipment 100 is normally used, and the direction opposite to the "front" is "rear", that is, the direction of the door body 2 towards the cabinet 1.

[0041] As Figure 3 , 4In the hinge device 3, the fixed hinge part 31 is provided with a first hinge joint A and a second hinge joint B, and the movable hinge part is provided with a third hinge joint C and a fourth hinge joint D; the linkage assembly 33 comprises a first linkage 331 hinged to the first hinge joint A, a second linkage 332 hinged to the second hinge joint B, a third linkage 333 hinged to the third hinge joint C, and a fourth linkage 334 hinged to the fourth hinge joint D; one end of the second linkage 332 away from the second hinge joint B is hinged to a fifth hinge joint E with one end of the fourth linkage 334 away from the fourth hinge joint D; the second linkage 332 has a sixth hinge joint F between the second hinge joint B and the fifth hinge joint E, and one end of the third linkage 333 away from the third hinge joint C is hinged to the sixth hinge joint F; the third linkage 333 has a seventh hinge joint G between the third hinge joint C and the sixth hinge joint F, and one end of the first linkage 331 away from the first hinge joint A is hinged to the seventh hinge joint G; the linkage assembly 33 has a folded state and an unfolded state; the first linkage 331 and the second linkage 332 are single-layer linkages, and the door closer 4 is arranged in the fourth linkage 334.

[0042] The linkage assembly 33, the fixed hinge part 31 and the movable hinge part form two quadrilaterals, respectively a quadrilateral ABFG formed by a line AB connecting the first hinge joint A and the second hinge joint B, a line BF connecting the second hinge joint B and the sixth hinge joint F, a line FG connecting the sixth hinge joint F and the seventh hinge joint G, and a line GA connecting the seventh hinge joint G and the first hinge joint A, and a quadrilateral CDEF formed by a line CF connecting the third hinge joint C and the sixth hinge joint F, a line FE connecting the sixth hinge joint F and the fifth hinge joint E, a line ED connecting the fifth hinge joint E and the fourth hinge joint D, and a line DC connecting the fourth hinge joint D and the third hinge joint C. In the process of rotating and opening the door body 2, the two quadrilaterals are deformed to drive the door body 2 to move along a preset track.

[0043] In the present application, the door closer 4 is arranged on the fourth linkage 334, which can automatically close the door when the door body 2 loses external force, and can also prevent the door body 2 from being not tightly closed to cause cold leakage. However, due to the size of the door closer 4 itself, arranging the door closer 4 on the fourth linkage 334 will increase the thickness of the linkage assembly 33 to a certain extent. In the present application, the first linkage 331 and the second linkage 332 are arranged as single-layer linkages, which can reduce the thickness of the linkage assembly 33. Therefore, the hinge device 3 provided by the present application can have the effect of automatic door closing while maintaining a relatively thin thickness.

[0044] In some embodiments, the fixed hinge part 31 comprises a first fixed plate 311 fixed to the cabinet 1, a first hinged plate 312 connected to the first fixed plate 311 and used to connect the linkage assembly 33, the first hinged plate 312 being perpendicular to the first fixed plate 311; in the direction perpendicular to the first hinged plate 312, the thickness of the hinge device 3 is 17.5-18.5 mm.

[0045] In some embodiments, in the direction perpendicular to the first hinged plate 312, the thickness of the hinge device 3 is 18.2 mm.

[0046] The first fixed plate 311 is fixed parallel to the front side of the cabinet 1, that is, the first fixed plate 311 is vertically arranged, and the first hinged plate 312 perpendicular to the first fixed plate 311 is horizontally arranged, the first hinged plate 312 is provided with two, respectively connected to the upper and lower edges of the first fixed plate 311, in the direction perpendicular to the first hinged plate 312, that is, in the vertical direction, the hinge device 3 has a relatively thin thickness, so that the appearance is better.

[0047] In some embodiments, the first hinged plate 312 has a first edge 3121 away from the movable hinge part 32, the first edge 3121 being parallel to the plane where the opening side of the cabinet 1 is located; the first hinged plate 312 is provided with a first hinge point A and a second hinge point B used to be rotationally connected with the linkage assembly 33, and the acute angle between the extension line of the line connecting the first hinge point A and the second hinge point B and the first edge 3121 is 33.5°.

[0048] In the present application, the first hinge point A and the second hinge point B are arranged on the fixed hinge part 31 used to be fixed to the cabinet 1 for being connected with the linkage assembly 33, the extension line of the line connecting the first hinge point A and the second hinge point B is arranged to have an angle of 33.5° with the first edge 3121, that is, the distance between the first hinge point A and the second hinge point B in the left-right direction is greater than that in the front-back direction, the stress area of the first hinged plate 312 in the left-right direction is increased, thereby increasing the stress area of the first hinged plate 312 as a whole, the overall strength of the hinge device 3 can be improved, the door body 2 can be prevented from sagging, and the stability of the hinge device 3 can be improved.

[0049] In some embodiments, the hinge device 3 has a rotating end; the first hinged plate 312 has a second edge 3122 close to the rotating end, the distance between the second hinge point B and the first edge 3121 is less than the distance between the first hinge point A and the first edge 3121, and the distance between the second hinge point B and the second edge 3122 is greater than the distance between the first hinge point A and the second edge 3122.

[0050] The rotating end is defined as: when the fixed hinge part 31 and the movable hinge part 32 rotate relative to each other, the fixed hinge part 31 and the movable hinge part 32 are angularly opened and closed, and the hinge device 3 is away from the opening and closing end, that is, the fixed hinge part 31 is away from the opening and closing end, and the movable hinge part 32 is away from the opening and closing end. The distance between the second hinge point B and the first edge 3121 is less than the distance between the first hinge point A and the first edge 3121, and the distance between the second hinge point B and the second edge 3122 is greater than the distance between the first hinge point A and the second edge 3122, that is, the positional relationship between the first hinge point A and the second hinge point B on the first hinge plate 312 is: the direction in which the second hinge point B points to the first hinge point A is further away from the cabinet 1 and further away from the opening and closing end of the door body 2.

[0051] In some embodiments, the movable hinge part 32 includes a second hinge plate 322 connected to the linkage assembly 33, the second hinge plate 322 has a third edge 3221 away from the fixed hinge part 31, and when the linkage assembly 33 is in the folded state, the third edge 3221 is parallel to the first edge 3121; the second hinge plate 322 is provided with a third hinge point C and a fourth hinge point D for rotating connection with the linkage assembly 33, and the included angle between the extension line of the line connecting the third hinge point C and the fourth hinge point D and the third edge 3221 is 1°.

[0052] The movable hinge part 32 further includes a second fixed plate 321 for fixing to the door body 2, the second fixed plate 321 is vertically arranged with the second hinge plate 322 and connected to the third edge 3221 of the second hinge plate 322, the second fixed plate 321 is parallel to the rear side of the door body 2, the rear side of the door body 2 is vertically arranged, and the second hinge plate 322 is horizontally arranged. The second hinge plate 322 is provided with two, respectively connected to the upper and lower edges of the second fixed plate 321. The third hinge point C on the two second hinge plates 322 is oppositely arranged, and the fourth hinge point D is also oppositely arranged, or in other words, the line connecting the two third hinge points C on the two second hinge plates 322 is perpendicular to the second hinge plate 322, and the line connecting the two fourth hinge points D on the two second hinge plates 322 is also perpendicular to the second hinge plate 322.

[0053] The included angle between the extension line of the line connecting the third hinge point C and the fourth hinge point D on the same second hinge plate 322 and the third edge 3221 is also the included angle between the straight line where the third hinge point C and the fourth hinge point D are located and the left-right direction. Forming an included angle between the straight line where the third hinge point C and the fourth hinge point D are located and the left-right direction can make the movable hinge part 32 have a certain amount of forward movement when it is opened, that is, the door body 2 which opens together with the movable hinge part 32 also has a large amount of forward movement, thereby avoiding collision with the cabinet 200 when the door body 2 is opened.

[0054] In some embodiments, the second hinged plate 322 has a fourth edge 3222 close to the rotating end, the distance between the third hinged point C and the third edge 3221 is less than the distance between the fourth hinged point D and the third edge 3221, and the distance between the third hinged point C and the fourth edge 3222 is less than the distance between the fourth hinged point D and the fourth edge 3222, that is, the connecting line direction of the third hinged point C and the fourth hinged point D is substantially the same as the connecting line direction of the first hinged point A and the second hinged point B in the folded state, but the deflection angle is different.

[0055] Regarding the positional relationship and related movement relationship among the fixed hinge part 31, the movable hinge part 32, and the connecting rod assembly 33, in the process of switching from the closed state to the open state, the quadrilateral ABFG formed by the connecting line of the first hinged point A, the second hinged point B, the sixth hinged point F, and the seventh hinged point G is always a convex quadrilateral, and the quadrilateral CDEF formed by the connecting line of the third hinged point C, the sixth hinged point F, the fifth hinged point E, and the fourth hinged point D is always a convex quadrilateral, which avoids dead points in the process of opening and closing the door body 2 and improves the smoothness of the door body 2. It should be noted that the above-mentioned dead point refers to the point at which the inner angle corresponding to the angle of 180° when the quadrilateral ABFG becomes a triangle in the process of switching from the closed state to the open state of the movable hinge part 32.

[0056] In the quadrilateral ABFG formed by the connecting line of the first hinged point A, the second hinged point B, the sixth hinged point F, and the seventh hinged point G, the connecting line AG of the first hinged point A and the seventh hinged point G is the longest, which can make the door body 2 have more forward movement when rotating to open, thereby further avoiding interference between the door body 2 and the cabinet 200 during rotation.

[0057] In the quadrilateral ABFG formed by the connecting line of the first hinged point A, the second hinged point B, the sixth hinged point F, and the seventh hinged point G, the sum of the connecting line AB of the first hinged point A and the second hinged point B and the connecting line AG of the first hinged point A and the seventh hinged point G is greater than the sum of the connecting line BF of the second hinged point B and the sixth hinged point F and the connecting line FG of the sixth hinged point F and the seventh hinged point G. On the one hand, it can reduce the volume of the connecting rod assembly 33 in the folded state, thereby reducing the distance between the door body 2 and the cabinet 1 in the closed state, improving the sealing performance of the door body 2; on the other hand, it is more conducive to making the door body 2 have more side movement in the left-right direction and towards the front side when rotating to open, increasing the opening degree of the door body 2, and avoiding the influence of the door body 2 on the drawer / shelf etc. in the cabinet 1.

[0058] When the movable hinge piece 32 is in the closed state, the second hinge point B and the seventh hinge point G correspond to obtuse angles B and G, and the first hinge point A and the sixth hinge point F correspond to acute angles A and F in the quadrilateral ABFG formed by the first hinge point A, the second hinge point B, the sixth hinge point F, and the seventh hinge point G. The volume of the linkage assembly 33 in the folded state can be reduced, thereby reducing the distance between the door body 2 and the cabinet 1 in the closed state and improving the sealing performance of the door body 2.

[0059] When the movable hinge piece 32 is in the closed state, the line segment between the second hinge point B and the sixth hinge point F extends in a direction away from the first edge from the second hinge point B to the sixth hinge point F. When the door body 2 is initially rotated from the closed state to the first opening angle, the door body 2 moves forward by a relatively large amount and rotates by a relatively small angle compared to the amount of translation in other horizontal directions, which facilitates smooth opening of the door body 2.

[0060] When the door body 2 is rotated from the closed state to the first opening angle, the translation of the door body 2 is mainly driven by the expansion of the quadrilateral ABFG formed by the first hinge point A, the second hinge point B, the sixth hinge point F, and the seventh hinge point G. That is, when the door body 2 is rotated from the closed state to the first opening angle, the expansion amplitude of the quadrilateral ABFG formed by the first hinge point A, the second hinge point B, the sixth hinge point F, and the seventh hinge point G is greater than the expansion amplitude of the quadrilateral CDEF formed by the third hinge point C, the sixth hinge point F, the fifth hinge point E, and the fourth hinge point D. The aforementioned first opening angle is about 10-15°, but is not limited thereto.

[0061] In combination with the drawings, during the process in which the door body 2 is continuously rotated from 90° to the maximum opening angle (118°), the translation of the door body 2 is mainly driven by the expansion of the quadrilateral CDEF formed by the third hinge point C, the sixth hinge point F, the fifth hinge point E, and the fourth hinge point D. That is, during the process in which the door body 2 is continuously rotated from 90° to the maximum opening angle, the expansion amplitude of the quadrilateral CDEF formed by the third hinge point C, the sixth hinge point F, the fifth hinge point E, and the fourth hinge point D is greater than the expansion amplitude of the quadrilateral ABFG formed by the first hinge point A, the second hinge point B, the sixth hinge point F, and the seventh hinge point G.

[0062] In some embodiments, when the door body is opened by 90°, the distance between the movable hinge piece 32 and the fixed rotating end P1 of the fixed hinge piece 31 is 0.9 mm.

[0063] When the movable hinge part 32 is in the closed state and the open state, the line CF connecting the third hinge point C and the sixth hinge point F is located on the side of the line FG connecting the sixth hinge point F and the seventh hinge point G away from the first fixed plate 311. The quadrilateral ABFG formed by the first hinge point A, the second hinge point B, the sixth hinge point F and the seventh hinge point G and the quadrilateral CDEF formed by the third hinge point C, the sixth hinge point F, the fifth hinge point E and the fourth hinge point D do not intersect, and no interference occurs, improving the smoothness of the door body 2.

[0064] In the quadrilateral CDEF formed by the third hinge point C, the sixth hinge point F, the fifth hinge point E and the fourth hinge point D, the sum of the line EF connecting the sixth hinge point F and the fifth hinge point E and the line ED connecting the fifth hinge point E and the fourth hinge point D is greater than the sum of the line CF connecting the third hinge point C and the sixth hinge point F and the line CD connecting the fourth hinge point D and the third hinge point C. A large-angle opening of the door can be achieved, i.e. the maximum opening angle of the door body 2 is increased, the opening degree of the door body 2 is increased, and it is convenient for the user to take and place articles.

[0065] When the movable hinge part 32 is in the closed state, in the quadrilateral CDEF formed by the third hinge point C, the sixth hinge point F, the fifth hinge point E and the fourth hinge point D, the internal angle corresponding to the sixth hinge point F and the fourth hinge point D is obtuse, and the internal angle corresponding to the third hinge point C and the fifth hinge point E is acute. When the movable hinge part 32 is in the closed state, the two quadrilaterals formed by the link assembly 33, the fixed hinge part 31 and the movable hinge part 32 are folded and flattened in the front-rear direction, which can reduce the volume of the link assembly 33 in the folded state, thereby reducing the distance between the door body 2 and the cabinet 1 in the closed state, and improving the sealing performance of the door body 2.

[0066] In some embodiments, in the direction perpendicular to the first fixed plate 311, i.e. in the front-rear direction, the thickness of the hinge device 3 is 41-43 mm when the link assembly 33 is in the folded state.

[0067] In some embodiments, in the front-rear direction, the thickness of the hinge device 3 is 42 mm when the link assembly 33 is in the folded state.

[0068] The specific structure of the door closer 4 and the connection relationship with the fourth link 334 are as follows:

[0069] The fourth connecting rod 334 is provided with an oblong hole 3342, and the second connecting rod 332 is provided with a cam 3321 at one end close to the fifth hinge point E. The door closer 4 comprises a sliding piece 41 and an elastic piece, wherein the sliding piece 41 is slidably connected with the fourth connecting rod 334 through the oblong hole 3342, one end of the elastic piece is fixed relative to the fourth connecting rod 334, and the other end abuts against the sliding piece 41. During the process that the connecting rod assembly 33 is switched from the folded state to the unfolded state, the cam 3321 gradually abuts against the sliding piece 41, and the sliding piece 41 moves along the length direction of the oblong hole 3342 to deform the elastic piece under stress. Thus, after the door body 2 loses the acting force, the elastic piece can push the sliding piece 41 to move reversely under the action of the elastic force, the sliding piece 41 pushes the cam 3321 to make the second connecting rod 332 reversely rotate, thereby realizing the effect of automatic door closing.

[0070] In some embodiments, the sliding piece 41 comprises a connecting column 411 which passes through the oblong hole 3342 and moves the sliding piece 41 along the length direction of the oblong hole 3342, and the length direction of the elastic piece is consistent with the length direction of the oblong hole 3342, so that the moving amount of the sliding piece 41 under the action of the cam 3321 can be completely transmitted to the elastic piece without component, that is, the transmission effect between the elastic piece and the sliding piece 41 is optimal.

[0071] In some embodiments, the fourth connecting rod 334 can be a single-layer connecting rod or a double-layer connecting rod, and the fourth connecting rod 334 in the figure is a double-layer connecting rod, and the fourth connecting rod 334 comprises a third fixed plate arranged vertically and a third hinge plate 3341 connected with the upper and lower edges of the third fixed plate, the fourth connecting rod 334 is connected with the movable hinge piece 32 and the second connecting rod 332 through the third hinge plate 3341, and two third hinge plates 3341 are correspondingly provided with oblong holes 3342, and the connecting column 411 passes through the oblong holes 3342 at both ends.

[0072] In some embodiments, the elastic piece is a spring 42, and the door closer 4 further comprises a fixed block 43 and a guide cylinder 44, the fixed block 43 is fixed to the third hinge plate 3341, and the spring 42 is sleeved outside the guide cylinder 44. The guide cylinder 44 can be integrally formed with the fixed block 43 or separately arranged and connected with the fixed block 43. The guide cylinder 44 is arranged in the spring 42 as the elastic piece to prevent the spring 42 from deflecting when the stress is uneven.

[0073] It should be understood that although the present specification is described in terms of embodiments, each embodiment does not necessarily contain only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that those skilled in the art can understand.

[0074] The above detailed description set forth above in connection with the appended drawings is merely descriptive of the best mode presently contemplated of carrying out the application. The detailed description set forth above in connection with the appended drawings is presented by way of example: an equivalent altematives to those explicitly de- scribed herein can be used; and many modifications and variations to those explicitly described herein can be resorted to without departing from the spirit and scope of the application, as such modifications and variations would be obvious to those skilled in the art.

Claims

1. A hinge device (3) characterized in that, The hinge device (3) comprises a fixed hinge part (31) for fixing to the cabinet (1), a movable hinge part (32) for fixing to the door body (2), a linkage assembly (33) connecting the movable hinge part (32) to the fixed hinge part (31), and a door closer (4) arranged in the linkage assembly (33); the fixed hinge part (31) is provided with a first hinge point (A) and a second hinge point (B), and the movable hinge part is provided with a third hinge point (C) and a fourth hinge point (D); The linkage assembly (33) comprises a first linkage (331) hinged to the first hinge point (A), a second linkage (332) hinged to the second hinge point (B), a third linkage (333) hinged to the third hinge point (C), and a fourth linkage (334) hinged to the fourth hinge point (D); one end of the second linkage (332) away from the second hinge point (B) is hinged to a fifth hinge point (E) with one end of the fourth linkage (334) away from the fourth hinge point (D); the second linkage (332) has a sixth hinge point (F) between the second hinge point (B) and the fifth hinge point (E), and one end of the third linkage (333) away from the third hinge point (C) is hinged to the sixth hinge point (F); the third linkage (333) has a seventh hinge point (G) between the third hinge point (C) and the sixth hinge point (F), and one end of the first linkage (331) away from the first hinge point (A) is hinged to the seventh hinge point (G); the linkage assembly (33) has a folded state and an unfolded state. The first linkage (331) and the second linkage (332) are single-layer linkages, and the door closer (4) is arranged in the fourth linkage (334).

2. The hinge device (3) according to claim 1, characterized in that The fixed hinge part (31) comprises a first fixed plate (311) for fixing to the cabinet (1), and a first hinge plate (312) connected to the first fixed plate (311) and used for connecting the linkage assembly (33); the first hinge plate (312) is perpendicular to the first fixed plate (311); in the direction perpendicular to the first hinge plate (312), the thickness of the hinge device (3) is 17.5-18.5 mm.

3. The hinge device (3) according to claim 1, characterized in that In the direction perpendicular to the first fixed plate (311), when the linkage assembly (33) is in the folded state, the thickness of the hinge device (3) is 41-43 mm.

4. The hinge device (3) according to claim 2, characterized in that The first hinge plate (312) has a first edge (3121) away from the movable hinge part (32), and the first edge (3121) is parallel to the plane where the opening side of the cabinet (1) is located; the first hinge plate (312) is provided with the first hinge point (A) and the second hinge point (B) for rotational connection with the linkage assembly (33); the acute angle between the extension line of the line connecting the first hinge point (A) and the second hinge point (B) and the first edge (3121) is 33.5°.

5. The hinge device (3) according to claim 4, characterized in that The hinge device (3) has a rotating end; the first hinged plate (312) has a second edge (3122) close to the rotating end, the second hinged point (B) is farther away from the first edge (3121) than the first hinged point (A), and the second hinged point (B) is closer to the second edge (3122) than the first hinged point (A).

6. The hinge device (3) according to claim 5, characterized in that The movable hinge piece (32) comprises a second hinged plate (322) for connecting the linkage assembly (33), the second hinged plate (322) has a third edge (3221) away from the fixed hinge piece (31), the third edge (3221) is parallel to the first edge (3121) when the linkage assembly (33) is in the folded state; the second hinged plate (322) is provided with a third hinged point (C) and a fourth hinged point (D) for rotating connection with the linkage assembly (33), and the angle between the extension line of the line connecting the third hinged point (C) and the fourth hinged point (D) and the third edge (3221) is 1°.

7. The hinge device (3) according to claim 6, characterized in that The second hinged plate (322) has a fourth edge (3222) close to the rotating end, the third hinged point (C) is closer to the third edge (3221) than the fourth hinged point (D), and the third hinged point (C) is closer to the fourth edge (3222) than the fourth hinged point (D).

8. The hinge device (3) according to claim 1, characterized in that The fourth linkage (334) is provided with an elongated hole (3342), the second linkage (332) is provided with a cam (3321) at one end close to the fifth hinged point (E), and the door closer (4) comprises: a sliding piece (41) slidably connected with the fourth linkage (334) through the elongated hole (3342); a resilient piece fixed at one end relative to the fourth linkage (334) and abutting against the sliding piece (41), wherein during switching of the linkage assembly (33) from the folded state to the unfolded state, the cam (3321) presses the sliding piece (41) to deform the resilient piece under stress.

9. The hinge device (3) according to claim 8, characterized in that The sliding piece (41) is provided with a connecting column (411) penetrating through the elongated hole (3342), and the length direction of the elongated hole (3342) is consistent with the length direction of the resilient piece.

10. A refrigeration appliance (100), characterized in that The door closer (4) comprises a box body (1), a door body (2) for opening or closing the box body (1), and a hinge device (3) as claimed in any one of claims 1-9 connecting the box body (1) and the door body (2).

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