Hinge and refrigeration equipment with same

Abstract

The invention provides a hinge and refrigeration equipment with the hinge, the hinge comprises a cabinet body hinge seat assembled on a cabinet body and a door body hinge seat assembled on a door body, the cabinet body hinge seat and the door body hinge seat are in pivot connection through a pivot shaft, the hinge further comprises a cam, an elastic supporting piece, a limiting part and a guiding piece, the cam is connected with the pivot shaft and rotates synchronously with the pivot shaft around the axis of the pivot shaft; the limiting part limits the elastic supporting piece to do linear motion in the vertical direction. The cam abuts against the guiding piece, and the elastic supporting piece supports the guiding piece to do linear motion from bottom to top. When the door body hinge base is located at the door closing position, the cam makes linear contact with the guiding piece, and the contact line of the cam and the guiding piece is located under the axis of the pivot shaft. According to the hinge and the refrigeration equipment with the hinge, through the matching structure of the elastic supporting piece, the cam and the guiding piece, the door can be opened in a labor-saving mode, power transmission parts are reduced, the thickness of the hinge is reduced, and the transportation and storage cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigeration equipment, and in particular to a hinge and refrigeration equipment having the same. Background Art

[0002] Refrigeration equipment such as freezers, refrigerators, wine cabinets, etc. usually use hinges to connect the door and the cabinet, so that the door can rotate relative to the cabinet to open or close the cabinet to store or retrieve items.

[0003] However, the hinges of refrigeration equipment in the prior art are usually assembled at the rear of the cabinet and protrude outside the cabinet, resulting in a larger product size of the entire machine. In particular, in order to achieve the effect of saving effort in opening the door, a more complex structure is usually adopted for the labor-saving hinge, which makes it easier to increase the size and thickness of the hinge, thereby resulting in a larger product size of the entire machine and higher transportation and storage costs. Summary of the invention

[0004] In order to solve the above technical problems, the purpose of the present invention is to provide a hinge and a refrigeration device having the same, so as to solve the problem that the existing hinge has a large size and thickness, resulting in a large size of the whole product and high transportation and storage costs.

[0005] To achieve one of the above-mentioned purposes, an embodiment of the present invention provides a hinge, comprising a cabinet hinge seat assembled on a cabinet, and a door hinge seat assembled on a door, wherein the cabinet hinge seat is pivotally connected to the door hinge seat via a pivot shaft, and the door hinge seat has a door-closing position for closing the cabinet, and the hinge further comprises:

[0006] A cam connected to the pivot shaft and rotating synchronously with the pivot shaft around the axis of the pivot shaft;

[0007] Elastic support member;

[0008] A limiting portion, which limits the elastic support member from performing linear motion in the up-down direction;

[0009] A guide member, the cam abuts against the guide member, and the elastic support member supports the guide member to move linearly from bottom to top;

[0010] When the door hinge seat is at the door closing position, the cam is in linear contact with the guide member, and the contact line between the cam and the guide member is located directly below the axis of the pivot shaft.

[0011] As a further improvement of one embodiment of the present invention, the door hinge seat has an initial hovering position for opening the cabinet, and during the process of the door hinge seat rotating from the door closing position to the initial hovering position, the cam is always in linear contact with the guide member, and the contact line between the cam and the guide member moves from back to front, and the distance between the contact line and the axis of the pivot shaft in the up and down directions gradually decreases.

[0012] As a further improvement of one embodiment of the present invention, during the rotation of the door hinge seat from the door closing position to the initial hovering position, the distance between the contact line between the cam and the guide member and the lower end of the cabinet hinge seat along the up and down direction gradually decreases.

[0013] As a further improvement of one embodiment of the present invention, the guide member is provided with a curved groove at one end toward the pivot shaft, and the bottom wall of the curved groove gradually extends upward from front to rear. During the rotation of the door hinge seat from the closed position to the initial hovering position, the contact line between the cam and the guide member moves from front to rear along the bottom wall of the curved groove.

[0014] As a further improvement of an embodiment of the present invention, the door hinge seat has an opening position for opening the cabinet, and in the initial hovering position, the angle of rotation of the door hinge seat from the closing position relative to the cabinet hinge seat is a first door opening angle, and in the door opening position, the angle of rotation of the door hinge seat from the closing position relative to the cabinet hinge seat is a second door opening angle, and the second door opening angle is greater than the first door opening angle; when the door hinge seat is in the door opening position, the rear wall of the cam is in contact with the groove wall of the curved groove.

[0015] As a further improvement of one embodiment of the present invention, the limiting portion includes a sliding shaft and a sliding groove, the sliding groove is arranged on the cabinet hinge seat, the sliding shaft passes through the support rod and is connected to the sliding groove, and the sliding groove limits the sliding shaft to make linear motion along the up and down directions; in the process of the door hinge seat rotating from the closed position to the initial hovering position, the distance between the contact line between the cam and the guide member and the axis of the sliding shaft along the up and down directions gradually increases.

[0016] As a further improvement of one embodiment of the present invention, the sliding shaft is located below the guide member, the axis of the pivot shaft and the axis of the sliding shaft form a first plane, and when the door hinge seat is in the closed position, the contact line between the cam and the guide member is located on the first plane.

[0017] As a further improvement of an embodiment of the present invention, the cam is integrally arranged with the pivot shaft.

[0018] As a further improvement of an embodiment of the present invention, the guide member and the elastic support member are integrally provided.

[0019] To achieve one of the above-mentioned purposes of the invention, an embodiment of the present invention further provides a refrigeration device, comprising a cabinet body and a door body assembled on the cabinet body, and also comprising the hinge as described above, wherein the cabinet hinge seat is assembled on the cabinet body, and the door hinge seat is assembled on the door body.

[0020] Compared with the prior art, the present invention has the following beneficial effects: the hinge of the present invention and the refrigeration equipment having the same can maximize the supporting effect of the elastic support member on the cam, thereby providing the maximum door opening assistance, and reduces the power transmission components, reduces the transmission loss of the supporting force of the elastic support member on the cam, has a simple structure, can reduce the thickness of the hinge along the front and rear directions, reduce transportation and storage costs, and also provide a larger operating space for assembling the door hinge seat to the door body, so as to facilitate on-site installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional structural schematic diagram of a refrigeration device according to an embodiment of the present invention;

[0022] Figure 2 It is a three-dimensional structural schematic diagram of a hinge according to an embodiment of the present invention, which illustrates a state where the door hinge seat is in a door closing position;

[0023] Figure 3 for Figure 2 Explosion diagram of

[0024] Figure 4 for Figure 2 A front view of

[0025] Figure 5 for Figure 4 The longitudinal section view along the AA line;

[0026] Figure 6 It is a longitudinal cross-sectional view of a hinge according to an embodiment of the present invention, which illustrates the state of the door hinge seat in the initial hovering position;

[0027] Figure 7 It is a longitudinal cross-sectional view of a hinge according to an embodiment of the present invention, which illustrates the state of the door hinge seat in the door opening position.

[0028] Among them, 100, refrigeration equipment; 1, hinge; 10, cabinet hinge seat; 11, bottom plate; 12, side plate; 13, end stop; 14, protrusion; 20, door hinge seat; 30, pivot shaft; 40, cam; 41, upper wall; 42, front wall; 43, rear wall; 50, sliding shaft; 60, guide member; 61, curved groove; 70, elastic support member; 71, support rod; 72, spring; 80, sliding groove; 2, cabinet; 3, door. DETAILED DESCRIPTION

[0029] The present invention will be described in detail below with reference to the specific embodiments shown in the accompanying drawings.

[0030] In various drawings of the present invention, for the sake of convenience of illustration, some sizes of structures or parts are exaggerated relative to other structures or parts, and thus, only the basic structure of the subject matter of the present invention is illustrated.

[0031] It should be understood that although the terms first, second, etc. may be used in this document 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.

[0032] See also Figure 1 , a refrigeration device 100 provided by an embodiment of the present invention comprises a hinge 1, a cabinet 2 and a door 3, wherein the cabinet 2 has a refrigeration compartment for storing and refrigerating items, the door 3 is assembled to the cabinet 2 and can rotate relative to the cabinet 2 to open or close the refrigeration compartment, the door 3 is connected to the cabinet 2 by a hinge 1, and the hinge 1 supports the opening and closing of the door 3. The refrigeration device 100 can be specifically configured as a refrigerator, a freezer, a wine cabinet, etc., especially a large-volume or ultra-thin refrigeration device.

[0033] The hinge 1 includes a cabinet hinge seat 10 and a door hinge seat 20, and the door hinge seat 20 is rotatably connected to the cabinet hinge seat 10 through a pivot shaft 30. The cabinet hinge seat 10 is assembled to the cabinet 2, and the door hinge seat 20 is assembled to the door 3. When the door 3 opens or closes the refrigeration compartment, under the action of an external force, the door 3 rotates relative to the cabinet 2, and the door hinge seat 20 assembled to the door 3 rotates relative to the cabinet hinge seat 10, thereby driving the door 3 to rotate relative to the cabinet 2 to open or close the refrigeration compartment.

[0034] The cabinet hinge seat 10 can be fixedly connected to the cabinet 2 by screws or other assembly structures, and the door hinge seat 20 can be fixedly connected to the door 3 by screws or other assembly structures.

[0035] See also Figures 2 to 4Specifically, the pivot shaft 30 can be fixedly connected to one of the cabinet hinge seat 10 and the door hinge seat 20, and can be pivotally connected to the other one. In this embodiment, the pivot shaft 30 is fixedly connected to the cabinet hinge seat 10, and is pivotally connected to the door hinge seat 20. In other embodiments, the pivot shaft 30 can also be fixedly connected to the door hinge seat 20, and is pivotally connected to the cabinet hinge seat 10.

[0036] To clearly illustrate the positional relationship, in this embodiment, the refrigeration equipment 100 is placed horizontally on the ground as an example for description. When the door body 3 is closed, the direction from the cabinet body 2 to the door body 3 is defined as the direction from bottom to top, that is, the door body 3 is located above the cabinet body 2, and correspondingly, the door body hinge seat 20 is located above the cabinet body hinge seat 10; the direction from the cabinet body 2 toward the hinge 1 is defined as the direction from front to back, that is, the hinge 1 is located behind the cabinet body 2, and the door body 3 is flipped from the front of the cabinet body 2 to open; when the user faces the cabinet body 2 from the front, the two sides of the hinge 1 are respectively defined as left and right.

[0037] See also Figures 5 to 7 The door hinge seat 20 has a door closing position for closing the cabinet 2, an initial hovering position for opening the cabinet 2, and a door opening position for opening the cabinet 2.

[0038] The door closing position corresponds to the closed state of the door body 3. The so-called closed state of the door body 3 means that the door body 3 is buckled with the cabinet body 2, thereby closing the refrigeration compartment. At this time, the position of the door hinge seat 20 relative to the cabinet hinge seat 10 is the door closing position.

[0039] The initial hovering position corresponds to the state when the door body 3 is open and the external force is removed, the door body 3 can hover and the angle of the door body 3 is the smallest; the door opening position corresponds to the state when the door body 3 is open and the external force is removed, the door body 3 can hover and the angle of the door body 3 is the largest. The door body 3 is open, which means that the door body 3 is separated from the cabinet 2 except for the rear connection of the hinge 1, and the refrigeration compartment is exposed to the air.

[0040] Among them, when in the initial hovering position, the angle of rotation of the door hinge seat 20 from the door closing position relative to the cabinet hinge seat 10 is the first door opening angle; when in the door opening position, the angle of rotation of the door hinge seat 20 from the door closing position relative to the cabinet hinge seat 10 is the second door opening angle, then the second door opening angle is greater than the first door opening angle.

[0041] Preferably, the second door opening angle is 90°. Such a large door opening angle can facilitate the storage and access of items of larger volume or heavier weight; the first door opening angle is 55-65°, and more preferably 60°.

[0042] See also Figures 2 to 4The hinge 1 further comprises a cam 40, an elastic support member 70, a limiting part and a guide member 60. The cam 40 is connected to the pivot shaft 30 and rotates synchronously with the pivot shaft 30 around the axis of the pivot shaft 30. The limiting part limits the elastic support member 70 to make linear motion in the up-down direction. The cam 40 abuts against the guide member 60. The elastic support member 70 supports the guide member 60 to make linear motion from bottom to top. In this way, when the door body 3 is opened under the action of external force, the door body hinge seat 20 rotates relative to the cabinet body hinge seat 10 around the pivot shaft 30, and the elastic support member 70 provides an upward supporting force for the guide member 60, thereby supporting the guide member 60 to make linear motion from bottom to top, so that the guide member 60 has a tendency to drive the cam 40 to move upward, providing assistance for opening the door, and achieving the effect of saving effort in opening the door.

[0043] Combination Figure 5 When the door hinge seat 20 is in the door closing position, the cam 40 is in line contact with the guide member 60, and the contact line between the cam 40 and the guide member 60 is located directly below the axis of the pivot shaft 30. In this way, the supporting effect of the elastic support member 70 on the cam 40 can be maximized, thereby providing the maximum door opening assistance, and reducing the power transmission components, reducing the transmission loss of the supporting force of the elastic support member 70 on the cam 40, and the structure is simple. The thickness of the hinge 1 along the front-to-back direction can be reduced, and the transportation and storage costs can be reduced. It also provides a larger operating space for assembling the door hinge seat 20 on the door body 3, so as to facilitate on-site installation.

[0044] Furthermore, during the rotation of the door hinge seat 20 from the door closing position to the initial hovering position, the cam 40 and the guide member 60 are always in linear contact, and the contact line between the cam 40 and the guide member 60 moves from back to front. As the contact line moves from back to front, the distance between the contact line and the axis of the pivot shaft 30 in the vertical direction gradually decreases. During this process, the elastic support member 70 always provides an upward support force for the guide member 60, thereby saving effort in opening the door.

[0045] In this embodiment, the cam 40 is an eccentric wheel.

[0046] See also Figure 5 For ease of description, taking the door hinge seat 20 in the door closing position as a reference, the cam 40 includes an upper wall 41, a front wall 42 and a rear wall 43, wherein the upper wall 41 is the wall surface of the cam 40 located above the axis of the pivot shaft 30, the front wall 42 is the wall surface of the cam 40 located below and in front of the axis of the pivot shaft 30, and the rear wall 43 is the wall surface of the cam 40 located below and behind the axis of the pivot shaft 30.

[0047] In this embodiment, the distance between each point on the rear wall 43 and the axis of the pivot shaft 30 gradually decreases from bottom to top, so that the elastic supporting force of the elastic support member 70 can be converted into a booster force for driving the door hinge seat 20 to rotate during the rotation of the door hinge seat 20 around the pivot shaft 30.

[0048] Furthermore, during the rotation of the door hinge seat 20 from the door closing position to the initial hovering position, the distance between the contact line of the cam 40 and the guide member 60 and the lower end of the cabinet hinge seat 10 along the vertical direction gradually decreases. In this way, compared with the case where the distance between the contact line of the cam 40 and the guide member 60 and the lower end of the cabinet hinge seat 10 along the vertical direction remains unchanged, when the door hinge seat 20 rotates the same angle, the deformation recovery amount of the elastic support member 70 is greater, thereby providing a greater elastic support force.

[0049] See also Figure 5 Furthermore, a curved groove 61 is provided at one end of the guide member 60 facing the pivot shaft 30, that is, the upper end, and the bottom wall of the curved groove 61 gradually extends upward from front to back. Compared with the bottom wall with consistent height in the front-to-back direction, when the door hinge seat 20 rotates the same angle, the deformation recovery amount of the elastic support member 70 is larger, thereby providing a greater elastic supporting force.

[0050] During the rotation of the door hinge seat 20 from the door closing position to the initial hovering position, the contact line between the cam 40 and the guide member 60 moves from front to back along the bottom wall of the curved groove 61. In other words, during the rotation of the door hinge seat 20 from the door closing position to the initial hovering position, the change trajectory of the contact line between the cam 40 and the guide member 60 is a curve, and the curve is the change curve of the bottom wall of the curved groove 61 along the front-back direction. In this way, the shape advantage of the bottom wall of the curved groove 61 can be fully utilized, and the friction resistance when the cam 40 moves relative to the guide member 60 can be reduced.

[0051] See also Figure 7 Furthermore, when the door hinge seat 20 is in the door opening position, the rear wall 43 of the cam 40 fits with the groove wall of the curved groove 61, that is, at this time, the cam 40 and the curved groove 61 are in surface contact, so that the contact area between the cam 40 and the guide member 60 is increased, thereby increasing the friction between the cam 40 and the guide member 60, thereby preventing the door body 3 from continuing to rotate around the cabinet body 2.

[0052] The limit part can be set on the cabinet hinge seat 10, or on the packaging cover plate of the hinge 1, or at multiple places at the same time. Its function is to limit the movement of the elastic support member 70 so that it can only move in a straight line to avoid its swinging back and forth.

[0053] See also Figures 2 to 4In this embodiment, the limiting portion includes a sliding shaft 50 and a sliding groove 80. The sliding groove 80 is arranged on the cabinet hinge seat 10. The sliding shaft 50 passes through the support rod 71 and is connected to the sliding groove 80. The sliding shaft 50 is located below the guide member 60. The sliding groove 80 limits the sliding shaft 50 to make linear motion in the up and down directions, that is, the sliding groove 80 extends up and down, and the upper and lower ends of the sliding groove 80 limit the movement range of the sliding shaft 50 to limit the rotation angle of the door hinge seat 20 relative to the cabinet hinge seat 10, thereby limiting the opening angle of the door body 3 relative to the cabinet body 2.

[0054] Specifically, in the present embodiment, the cabinet hinge seat 10 includes a cabinet 2 connecting plate assembled against the rear wall 43 of the cabinet 2 and a pair of side walls arranged opposite to each other, wherein the pair of side walls are respectively connected to the opposite ends of the cabinet 2 connecting plate and extend in the same direction. Specifically, in the present embodiment, the pair of side walls respectively extend backward from the cabinet 2 connecting plate.

[0055] In this embodiment, a pair of sliding grooves 80 are disposed opposite to each other. The pair of sliding grooves 80 are disposed on a pair of side walls respectively. The axial ends of the sliding shaft 50 are respectively fitted in the pair of sliding grooves 80 .

[0056] In other embodiments, the sliding groove 80 can also be set on the connecting plate of the cabinet 2, and the sliding shaft 50 is provided with a matching portion matched with the sliding groove 80, so that the sliding shaft 50 can also move up and down along the sliding groove 80, thereby making the elastic support member 70 move up and down.

[0057] During the rotation of the door hinge seat 20 from the door closing position to the initial hovering position, the distance between the contact line between the cam 40 and the guide member 60 and the axis of the sliding shaft 50 along the up-down direction gradually increases.

[0058] Furthermore, the axis of the pivot shaft 30 and the axis of the sliding shaft 50 form a first plane, and when the door hinge seat 20 is in the door closing position, the contact line between the cam 40 and the guide member 60 is located on the first plane. In other words, the axis of the pivot shaft 30, the axis of the sliding shaft 50, and the contact line between the cam 40 and the guide member 60 are coplanar and located on a plane perpendicular to the front-to-back direction. This can not only avoid the strength loss of the elastic support member 70, but also reduce the thickness of the hinge 1 in the front-to-back direction.

[0059] Preferably, the cam 40 is integrally arranged with the pivot shaft 30. This can improve the strength of the cam 40 and prevent the cam 40 from being disengaged from the pivot shaft 30 or the cam 40 from breaking during the opening or closing process of the door body 3, thereby preventing the hinge 1 from failing.

[0060] Preferably, the length of the cam 40 along the axial direction of the pivot shaft 30 can be set to be smaller than the pivot shaft 30, so as to provide a larger operating space for the assembly of the door hinge seat 20, so as to facilitate the assembly of the hinge 1.

[0061] Furthermore, in the present embodiment, the guide member 60 and the elastic support member 70 are integrally provided, which can improve the connection strength between the two on the one hand, and reduce the processing difficulty on the other hand.

[0062] Preferably, the length of the guide member 60 along the axial direction of the pivot shaft 30 is smaller than the pivot shaft 30 , which can provide a larger operating space for assembling the cabinet hinge seat 10 , so as to facilitate the assembly of the hinge 1 .

[0063] See also Figures 2 to 4 In this embodiment, the elastic support member 70 includes a support rod 71 and a spring 72 mounted on the outer circumference of the support rod 71. One end of the support rod 71 is connected to the guide member 60 and the two are integrally arranged, that is, the guide member 60 is a part of the support rod 71. Specifically, the guide member 60 is located at the upper end of the support rod 71.

[0064] The other end of the support rod 71 away from the guide member 60 is inserted into the cabinet hinge seat 10 and is loosely connected to the cabinet hinge seat 10, that is, the support rod 71 can move up and down relative to the cabinet hinge seat 10. The support rod 71 is provided with a limiting flange, and one end of the spring 72 close to the guide member 60 abuts against the limiting flange, and the other end of the spring 72 away from the guide member 60 abuts against the cabinet hinge seat 10.

[0065] The sliding shaft 50 is disposed between the guide member 60 and the spring 72 so as not to affect the movement of the cam 40 and the spring 72 and is easy to process.

[0066] In other embodiments, the elastic support member 70 may also be configured as an elastic pillar or other forms, as long as the elastic support member 70 can support the guide member 60 to move linearly from bottom to top under the action of the elastic restoring force.

[0067] See also Figures 2 to 4 Furthermore, in the present embodiment, the cabinet hinge seat 10 includes an end block 13, and the end block 13 has a slot, and one end of the elastic support member 70 away from the guide member 60 is inserted into the slot, thereby limiting the elastic support member 70 to only move parallel to the connecting plate of the cabinet 2, that is, up and down movement, and avoiding increasing the thickness of the hinge 1 in the front and back directions; in the present embodiment, the lower end of the spring 72 abuts against the end block 13, and the lower end of the support rod 71 is inserted into the slot, and the inner diameter of the slot is larger than the outer diameter of the support rod 71, that is, the support rod 71 is loosely connected to the end block 13, and when the elastic support member 70 moves up and down synchronously with the sliding shaft 50, the lower end of the support rod 71 always protrudes out of the end block 13, which can prevent the elastic support member 70 from escaping from the end block 13 and causing the elastic support member 70 to fail.

[0068] See also Figures 2 to 4In this embodiment, the end stop 13 is a U-shaped plate, and the cabinet hinge seat 10 also includes a pair of protrusions 14, which are respectively provided on a pair of side panels 12 and protrude toward each other. The opening of the U-shaped plate is away from the spring 72 and toward the pair of protrusions 14. The pair of protrusions 14 are both clamped in the opening of the U-shaped plate. The combined action of the spring 72 and the protrusions 14 limits the movement of the U-shaped plate relative to the side panels 12, especially limits the up and down movement of the U-shaped plate.

[0069] In this embodiment, only one elastic support member 70 is provided. In other embodiments, a plurality of elastic support members 70 may also be provided.

[0070] Compared with the prior art, the hinge 1 provided by the present invention and the refrigeration equipment 100 having the same have the beneficial effect that the supporting effect of the elastic support member 70 on the cam 40 can be maximized, thereby providing the maximum door opening assistance, and the power transmission components are reduced, and the transmission loss of the supporting force of the elastic support member 70 on the cam 40 is reduced. The structure is simple, and the thickness of the hinge 1 along the front-to-back direction can be reduced, reducing transportation and storage costs, and providing a larger operating space for assembling the door hinge seat 20 on the door body 3 to facilitate on-site installation.

[0071] In the description of the present invention, it should be understood that the words "up", "down", "front", "back", "left", "right", etc. indicating directions or positional relationships in the present invention are all with reference to the directions defined in the text, and these words indicating directions or positional relationships are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0072] It should be understood that although this specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each implementation mode may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0073] The series of detailed descriptions listed above are only specific descriptions of feasible implementation methods of the present invention. They are not intended to limit the scope of protection of the present invention. Any equivalent implementation methods or changes that do not deviate from the technical spirit of the present invention should be included in the scope of protection of the present invention.

Claims

1. A hinge, comprising a cabinet hinge seat assembled on a cabinet, and a door hinge seat assembled on a door, wherein the cabinet hinge seat and the door hinge seat are pivotally connected via a pivot shaft, and the door hinge seat has a closed position for closing the cabinet, characterized in that: The hinge further comprises: A cam connected to the pivot shaft and rotating synchronously with the pivot shaft around the axis of the pivot shaft; Elastic support member; A limiting portion, which limits the elastic support member from performing linear motion in the up-down direction; A guide member, the cam abuts against the guide member, and the elastic support member supports the guide member to move linearly from bottom to top; When the door hinge seat is at the door closing position, the cam is in linear contact with the guide member, and the contact line between the cam and the guide member is located directly below the axis of the pivot shaft.

2. The hinge according to claim 1, characterized in that: The door hinge seat has an initial hovering position for opening the cabinet. During the process of the door hinge seat rotating from the door closing position to the initial hovering position, the cam is in linear contact with the guide member, and the contact line between the cam and the guide member moves from back to front, and the distance between the contact line and the axis of the pivot shaft in the up and down directions gradually decreases.

3. The hinge according to claim 2, characterized in that: During the process of the door hinge seat rotating from the door closing position to the initial hovering position, the distance between the contact line between the cam and the guide member and the lower end of the cabinet hinge seat along the up-down direction gradually decreases.

4. The hinge according to claim 2, characterized in that: The guide member is provided with a curved groove at one end toward the pivot axis, and the bottom wall of the curved groove gradually extends upward from front to rear. During the rotation of the door hinge seat from the door closing position to the initial hovering position, the contact line between the cam and the guide member moves from front to rear along the bottom wall of the curved groove.

5. The hinge according to claim 4, characterized in that: The door hinge seat has an opening position for opening the cabinet. When in the initial hovering position, the angle of rotation of the door hinge seat from the closing position relative to the cabinet hinge seat is a first door opening angle. When in the door opening position, the angle of rotation of the door hinge seat from the closing position relative to the cabinet hinge seat is a second door opening angle, and the second door opening angle is greater than the first door opening angle. When the door hinge seat is in the door opening position, the rear wall of the cam fits against the groove wall of the curved groove.

6. The hinge according to claim 2, characterized in that: The limiting portion includes a sliding shaft and a sliding groove, the sliding groove is arranged on the cabinet hinge seat, the sliding shaft passes through the support rod and is matched in the sliding groove, and the sliding groove limits the sliding shaft to make linear motion in the up and down directions; in the process of the door hinge seat rotating from the closed position to the initial hovering position, the distance between the contact line between the cam and the guide member and the axis of the sliding shaft in the up and down directions gradually increases.

7. The hinge according to claim 6, characterized in that: The sliding shaft is located below the guide member, the axis of the pivot shaft and the axis of the sliding shaft form a first plane, and when the door hinge seat is in the door closing position, the contact line between the cam and the guide member is located on the first plane.

8. The hinge according to claim 1, characterized in that: The cam is integrally arranged with the pivot shaft.

9. The hinge according to claim 1, characterized in that: The guiding member is integrally arranged with the elastic supporting member.

10. A refrigeration device, comprising a cabinet and a door assembled on the cabinet, characterized in that: It also includes the hinge according to any one of claims 1 to 9, wherein the cabinet hinge seat is assembled to the cabinet, and the door hinge seat is assembled to the door.

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