Hinge structure, refrigerator and door hovering control method

Abstract

The invention provides a hinge structure, a refrigerator and a door hovering control method. The hinge structure comprises a mounting plate, a fixed shell, a rotating part, a rotation stopping part and an elastic part, wherein the rotating part, the rotation stopping part and the elastic part are located in the fixed shell. The mounting plate is arranged on the box body; the two ends of the rotating piece are rotationally connected with the door body and the mounting plate. The outer side of the rotating piece is provided with a main sawtooth part. The side, close to the rotating piece, of the rotation stopping piece is provided with a matched sawtooth part. The elastic piece is slidably arranged on the side, away from the rotating piece, of the rotation stopping piece. When elastic force of the elastic piece is released, the rotation stopping piece is pushed to the position where the matched sawtooth part is meshed with the main sawtooth part, and therefore the door body is suspended. While hovering of the door body is achieved, the reliability of the hovering function structure is guaranteed, the use experience of a user is improved, and meanwhile the problem of the pain point of running-in failure of a traditional door closer is solved.

Description

Technical Field

[0001] The present invention belongs to the field of refrigerators, and more specifically, relates to a hinge structure, a refrigerator and a door suspension control method. Background Art

[0002] The intelligence of refrigerators is an important trend in the home appliance industry, which brings users a more convenient, intelligent and healthier life experience.

[0003] With the continuous advancement of technology and the continuous expansion of the market, I believe that smart refrigerators will play a more important role in the future. Among them, realizing automatic hovering of the refrigerator door is also an important direction for the future development of smart refrigerators.

[0004] Secondly, the angle limit of the traditional refrigerator door is usually achieved through the cooperation of the plastic door closer and hinge to achieve the maximum opening angle and tight closure of the refrigerator door. The door opening angle is closely related to the cooperation between the plastic door closer and the hinge. The refrigerator door opening angle is not easy to control and is prone to deviation, resulting in a poor door opening experience, which can easily lead to problems such as the refrigerator door hitting the cabinet and the refrigerator leaking cold. At the same time, as the number of times the refrigerator door is opened and closed increases, the door closer will gradually wear out, which can easily lead to failure of the cooperation between the door closer and the hinge, resulting in the door body not closing tightly, affecting the normal use of the refrigerator.

[0005] Later, someone in the industry proposed a solution to achieve the door hovering function, such as Figure 1 , Figure 2 As shown, a concave pit design is added on one side and a convex bump design is added on the other side on the mating surface of the door closer 11 and the hinge 12, and the door body 22 is suspended by the cooperation of the concave pit and the convex bump during the opening or closing process of the door body 22. Although this structure is simple and easy to implement, the door closer 11 is a plastic part, and the convex bump and the concave pit are interference fit during the relative rotation process. There are multiple interference frictions during the rotation process, which causes great loss to the door closer 11, poor reliability, and easily causes user complaints.

[0006] Therefore, how to propose a more reliable door suspension solution is an urgent problem to be solved in the industry. Summary of the invention

[0007] The purpose of the present invention is to propose a hinge structure, a refrigerator and a door body hovering control method, which realizes the door body hovering and replaces the traditional refrigerator using a door closer limiter, thereby solving the pain point problem of the traditional door closer running-in failure.

[0008] To achieve the above object, the technical solution adopted by the present invention is:

[0009] The present invention first proposes a hinge structure for connecting a box body and a door body, and the hinge structure comprises:

[0010] A mounting plate, arranged on the box body;

[0011] A fixed housing is arranged on the door body and has a first accommodating position and a second accommodating position adjacent to each other;

[0012] A rotating member, located in the first accommodation position, with two ends of the rotating member being rotatably connected to the door body and the mounting plate, and the outer side of the rotating member having a main serration portion;

[0013] a rotation-stopping member, located in the second accommodation position and movably matched with the rotating member, wherein a side of the rotation-stopping member close to the rotating member has a matching serration portion;

[0014] The elastic member is located in the second accommodating position and is slidably arranged on the side of the anti-rotation member away from the rotating member. When the elastic force of the elastic member is released, the anti-rotation member is pushed to the position where the matching serration part and the main serration part are engaged, so that the door body is suspended.

[0015] Further, the mating serration portion includes a first mating serration portion and a second mating serration portion which are spaced apart on the same side of the stop member; wherein, when the first mating serration portion corresponds to the main serration portion, the stop member is in a door opening direction stop state, and when the second mating serration portion corresponds to the main serration portion, the stop member is in a door closing direction stop state; the stop member is switched between the door opening direction stop state and the door closing direction stop state by a switching component.

[0016] Furthermore, the switching assembly includes a shifting member and a driving member, wherein the shifting member is partially inserted into the anti-rotation member, and the shifting member drives the rotating member to rotate under the action of the driving member, so that the rotating member switches between the anti-rotation state in the door opening direction and the anti-rotation state in the door closing direction.

[0017] Furthermore, a first recessed portion and a second recessed portion are provided on a side of the anti-rotation member away from the rotating member, and a power ball is connected to one end of the elastic member; wherein, when the anti-rotation member is in a anti-rotation state in the door opening direction, the power ball is placed in the first recessed portion, and when the anti-rotation member is in a anti-rotation state in the door closing direction, the power ball is placed in the second recessed portion.

[0018] Furthermore, the main sawtooth portion is located on at least part of the side surface of the rotating member, and the number of teeth in the main sawtooth portion is positively correlated with the maximum door opening angle.

[0019] Furthermore, the fixed shell includes a bottom box and a cover plate, the bottom box has the first accommodation position and the second accommodation position, and the cover plate is arranged at the opening of the bottom box.

[0020] Furthermore, the bottom box is detachably connected to the cover plate via a plurality of bolts.

[0021] Furthermore, the mounting plate is detachably connected to the box body via a plurality of screws.

[0022] The present invention further provides a refrigerator, comprising a box body and a door body, wherein the door body is rotatably connected to the box body via the hinge structure as described above.

[0023] The present invention also proposes a door hovering control method, which is applied to the refrigerator as described above, comprising:

[0024] When the anti-rotation member is in the anti-rotation state in the door opening direction, it is determined whether the opening angle of the door body reaches the preset maximum door opening angle;

[0025] If yes, the stopper is directly controlled to switch to the stop state in the door closing direction;

[0026] If not, when it is detected that the thrust at the door handle reaches the preset door closing force and / or the temperature at the door handle reaches the preset temperature, the stopper is controlled to switch to the closing direction stop state.

[0027] Compared with the prior art, the hinge structure, refrigerator and door body hovering control method proposed in the present invention have the following beneficial effects: the hinge structure proposed in the present invention can eliminate the traditional door closer, solving the problem of failure of the traditional door closer due to wear. At the same time, the present invention limits the door opening angle by meshing the main serration of the rotating part with the matching serration of the anti-rotation part in the hinge structure, so that the door body can hover even when it has not reached the limit position, which is conducive to ensuring that no unnecessary loss is caused to surrounding items during the door opening process. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0029] Figure 1 It is a structural schematic diagram of a refrigerator in the prior art;

[0030] Figure 2 for Figure 1 The enlarged structural diagram at A in the middle;

[0031] Figure 3 It is a structural schematic diagram of the refrigerator in the present invention;

[0032] Figure 4 It is an exploded schematic diagram of the hinge structure of the present invention;

[0033] Figure 5It is a structural schematic diagram of the stop rotation member of the present invention;

[0034] Figure 6 This is a schematic diagram of the structure of the hinge structure of the present invention after removing the base and the mounting plate;

[0035] Figure 7 This is a schematic diagram of the structure of the hinge structure of the present invention after removing the cover plate and the mounting plate;

[0036] Figure 8 It is a structural schematic diagram of the anti-rotation member of the present invention in the anti-rotation state in the door opening direction;

[0037] Fig. 9 It is a schematic diagram of the structure when the door body is opened in the present invention;

[0038] Fig.10 It is a structural schematic diagram of the anti-rotation member of the present invention in a state where the anti-rotation member is in the door closing direction;

[0039] Fig.11 It is a schematic diagram of the structure when the door body is closed in the present invention;

[0040] Among them, the main marks of the drawings in the figure are:

[0041] 11. Door closer; 12. Hinge;

[0042] 21. Box body; 22. Door body;

[0043] 3. Mounting plate;

[0044] 4. Rotating member; 41. Main sawtooth portion;

[0045] 5. anti-rotation member; 50. matching serrations; 51. first matching serrations; 52. second matching serrations; 53. first recessed portion; 54. second recessed portion;

[0046] 6. Elastic parts;

[0047] 7. Shifter;

[0048] 8. Power ball;

[0049] 9. Fixed shell; 91. Bottom box; 92. Cover plate; 901. First accommodation position; 902. Second accommodation position. DETAILED DESCRIPTION

[0050] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0051] The intelligentization of refrigerators is an important trend in the home appliance industry, which brings users a more convenient, intelligent and healthy life experience. With the continuous advancement of technology and the continuous expansion of the market, it is believed that smart refrigerators will play a more important role in the future. Among them, the automatic suspension of the refrigerator door is also an important direction for the development of smart refrigerators in the future. Secondly, the angle limit of the traditional refrigerator door opening and closing is usually achieved by the cooperation of the plastic door closer and the hinge to achieve the maximum opening angle and tight closure of the refrigerator door. The opening and closing angle is closely related to the cooperation of the plastic door closer and the hinge. The refrigerator door opening angle is not easy to control, and it is easy to deviate. The door opening experience is very poor, which is easy to cause the refrigerator door to hit the cabinet and the refrigerator to leak cold. At the same time, as the number of opening and closing of the refrigerator door increases, the door closer will gradually wear out, which is easy to cause the door closer and the hinge to fail to cooperate, resulting in the door body not closing tightly, affecting the normal use of the refrigerator. Although there is an improvement plan to achieve the suspension of the refrigerator door, it is achieved by the cooperation of the concave and convex surfaces. Specifically, a concave design is added on one side and a convex design is added on the other side on the mating surface of the door closer and the hinge, and the door body is suspended by the cooperation of the concave and convex during the opening or closing process of the door body. Although this structure is simple and easy to implement, the door closer is a plastic part, and the convex and concave parts are interference fit during the relative rotation process. Multiple interference frictions during the rotation process cause great wear and tear on the door closer, poor reliability, and easy to cause user complaints.

[0052] Based on this, the present invention proposes a hinge structure, a refrigerator and a door hovering control method, which ensures the reliability of the hovering function structure while realizing the door hovering, improves the user experience, and solves the pain point problem of the traditional door closer running-in failure.

[0053] Please also read Figure 3 , Figure 4 The hinge structure proposed by the present invention is used to connect the box body 21 and the door body 22, and the hinge structure at least includes:

[0054] The mounting plate 3 is arranged on the box body 21;

[0055] The fixed housing 9 is arranged on the door body 22 and has a first accommodation position 901 and a second accommodation position 902 adjacent to each other;

[0056] The rotating member 4 is located in the first accommodation position 901, and both ends of the rotating member 4 are rotatably connected to the door body 22 and the mounting plate 3, and the outer side of the rotating member 4 has a main serration portion 41;

[0057] The anti-rotation member 5 is located in the second accommodation position 902 and is movably matched with the rotating member 4. The anti-rotation member 5 has a matching serration portion 50 on one side close to the rotating member 4.

[0058] The elastic member 6 is located in the second accommodating position 902 and is slidably disposed on the side of the anti-rotation member 5 away from the rotating member 4. When the elastic force of the elastic member 6 is released, the anti-rotation member 5 is pushed to a position where the matching serration portion 50 is engaged with the main serration portion 41, thereby causing the door body 22 to suspend.

[0059] The hinge structure proposed by the present invention includes a mounting plate 3, a fixed housing 9, a rotating member 4 having a main sawtooth portion 41, a stop member 5 having a matching sawtooth portion 50, and an elastic member 6, which not only realizes the connection between the box body 21 and the door body 22, but also realizes the suspension of the door body 22. In actual application, during the process of opening or closing the door body 22, the rotating member 4 follows the door body 22 to rotate under the external force, and pushes the stop member 5 to the position where the elastic member 6 is compressed. When the external force is small enough or disappears, the elastic force of the elastic member 6 is released, pushing the stop member 5 to the position where the matching sawtooth portion 50 is meshed with the main sawtooth portion 41, so that the door body 22 is suspended.

[0060] By adopting the hinge structure proposed by the present invention, the traditional door closer 11 can be eliminated, and the failure problem of the traditional door closer 11 caused by wear is solved. At the same time, the present invention limits the door opening angle by meshing the main serration 41 of the rotating member 4 with the matching serration 50 of the anti-rotation member 5 in the hinge structure, so that the door body 22 can be suspended even when it has not reached the limit position, which is conducive to ensuring that no unnecessary loss is caused to surrounding items during the opening process of the door body 22.

[0061] Further preferably, in order to realize that the door body 22 can be suspended at will during the process of opening and closing the door, Figure 4 , Figure 5 As shown, the mating serration portion 50 includes a first mating serration portion 51 and a second mating serration portion 52 which are spaced apart and arranged on the same side of the stop member 5; wherein, when the first mating serration portion 51 corresponds to the main serration portion 41, the stop member 5 is in a door opening direction stop state, and when the second mating serration portion 52 corresponds to the main serration portion 41, the stop member 5 is in a door closing direction stop state; the stop member 5 is switched between the door opening direction stop state and the door closing direction stop state by a switching component.

[0062] In actual application, when the stopper 5 is in the stop state in the door opening direction, the door body 22 can be suspended arbitrarily in the door opening direction; and when the stopper 5 is in the stop state in the door closing direction, the door body 22 can be suspended arbitrarily in the door closing direction.

[0063] More preferably, if Figure 4 As shown, the switching assembly includes a shifting member 7 and a driving member. The shifting member 7 is partially inserted into the anti-rotation member 5. The shifting member 7 drives the rotating member 4 to rotate under the action of the driving member, so that the anti-rotation member 5 is switched between the anti-rotation state in the door opening direction and the anti-rotation state in the door closing direction.

[0064] In actual application, the driving member can be a motor, which drives the shift member 7 to rotate. At the same time, the rotation of the shift member 7 drives the stop member 5 to rotate, thereby changing the state of the stop member 5, that is, switching the stop member 5 to the stop state in the door opening direction or the stop state in the door closing direction.

[0065] More preferably, if Figure 4 , Figure 5 As shown, a first recessed portion 53 and a second recessed portion 54 are provided on a side of the stop member 5 away from the rotating member 4, and a power ball 8 is connected to one end of the elastic member 6; wherein, when the stop member 5 is in a stop state in the door opening direction, the power ball 8 is placed in the first recessed portion 53, and when the stop member 5 is in a stop state in the door closing direction, the power ball 8 is placed in the second recessed portion 54.

[0066] In actual application, since the external force is large enough to drive the door body 22 to rotate, during the rotation of the door body 22, the rotating part 4 rotates synchronously with the door body 22, and the rotating part 4 will apply a thrust to the stop part 5 when rotating. Under the thrust, the stop part 5 pushes the power ball 8 to apply a lateral force to the spring, thereby compressing the elastic part 6; subsequently, since the external force becomes smaller (until the external force disappears) and the door body 22 needs to hover, the elastic force of the elastic part 6 is released, pushing the power ball 8 to move laterally, and the power ball 8 squeezes the stop part 5 and pushes the stop part 5 to the position where the mating serration part 50 is meshed with the main serration part 41, thereby completing the stop of the rotation of the rotating part 4 by the stop part 5 and realizing the arbitrary hovering of the door body 22.

[0067] The force is transmitted between the elastic member 6 and the anti-rotation member 5 through the power ball 8. This transmission method is more efficient and rapid, and has better stability.

[0068] More preferably, if Figure 4 As shown, the main sawtooth portion 41 is located on at least part of the side surface of the rotating member 4, and the number of teeth in the main sawtooth portion 41 is positively correlated with the maximum door opening angle.

[0069] It should be noted that currently, refrigerators on the market usually use a plastic door closer 11 to limit the door opening angle. When opening the door with force, if the user uses too much force, the door closer 11 may be damaged, and further damage may be caused to the door body 22. The present invention eliminates the traditional door closer 11, and uses theoretical calculation to convert the door opening angle into the number of teeth of the rotating member 4, so that the door opening angle is more accurately limited, and the door opening and closing limit is completed more intuitively and quickly.

[0070] More preferably, if Figure 3 , Figure 4 As shown, the fixed housing 9 includes a bottom box 91 and a cover plate 92. The bottom box 91 has a first accommodation position 901 and a second accommodation position 902. The cover plate 92 is arranged at the opening of the bottom box 91. This makes it convenient to place other components inside the fixed housing 9, and the fixed housing 9 can also play a role in protection and waterproof and dustproof.

[0071] More preferably, if Figure 4 As shown, the bottom box 91 is detachably connected to the cover plate 92 via a plurality of bolts 93, which facilitates replacement and maintenance.

[0072] More preferably, if Figure 3 As shown, the mounting plate 3 is detachably connected to the box body 21 by a plurality of screws. The mounting plate 3 is detachably connected to the box body 21, which is convenient for replacement and maintenance.

[0073] Please also read Figure 3 The refrigerator proposed by the present invention includes a box body 21 and a door body 22, and the door body 22 is rotatably connected to the box body 21 through a hinge structure.

[0074] Preferably, if Figures 4 to 7 As shown, the hinge structure includes a mounting plate 3, a fixed shell 9, a rotating member 4, a stop member 5, a power ball 8, an elastic member 6, a shifting member 7 and a driving member. The fixed shell 9 includes a bottom box 91 and a cover plate 92. The bottom box 91 has a first accommodation position 901 and a second accommodation position 902. The bottom box 91 is detachably connected to the cover plate 92 by two bolts; the rotating member 4 is located in the first accommodation position 901, and the stop member 5, the power ball 8 and the elastic member 6 are located in the first accommodation position 901; one end of the mounting plate 3 is mounted on the bottom of the box body 21 by four screws, a fixed shaft sleeve is installed on the inner side of the bottom of the door body 22, a rotating shaft is passed through the inner side of the rotating member 4, one end of the rotating shaft is rotatably connected to the fixed shaft sleeve, and the other end of the rotating shaft is connected to the mounting plate 3 is rotatably connected; the outer side of the rotating member 4 has a main serration portion 41, the side of the stop member 5 close to the rotating member 4 is provided with a first matching serration portion 51 and a second matching serration portion 52, and the side of the stop member 5 away from the rotating member 4 is provided with a first recessed portion 53 and a second recessed portion 54; the power ball 8 is placed in the first recessed portion 53 or the second recessed portion 54; one end of the elastic member 6 is connected to the power ball 8, and the other end of the elastic member 6 is connected to the inner wall of the bottom box 91; a part of the shifting member 7 is passed through the inner side of the stop member 5, and the shifting member 7 is also connected to the driving member.

[0075] It should be understood that if Figures 4 to 5 and Figures 8 to 11 As shown, the stopper 5 has a door-opening direction stopper state and a door-closing direction stopper state; when the stopper 5 is in the door-opening direction stopper state, the first matching serration portion 51 of the stopper 5 corresponds to the main serration portion 41 of the rotating member 4, and the power ball 8 is placed in the first recessed portion 53; when the stopper 5 is in the door-closing direction stopper state, the second matching serration portion 52 of the stopper 5 corresponds to the main serration portion 41 of the rotating member 4, and the power ball 8 is placed in the second recessed portion 54. The shifting member 7 drives the stopper 5 to switch between the door-opening direction stopper state and the door-closing direction stopper state under the action of the driving member.

[0076] It should be noted that the elastic member 6 is a spring. In actual application, if the closed door body 22 is to be pulled, the resistances that the external force F applied by the user needs to overcome include: the suction force Fm between the door seal and the box body 21, and the friction force Fz between the fixed sleeve on the door body 22 and the rotating shaft of the rotating member 4. Generally, F>Fm+Fz must be satisfied to open the door. Because the magnitudes of the two forces Fm and Fz will also be different when the size of the door body 22 is different, the resistances that need to be overcome to open different door bodies 22 are also different. The present invention perfectly converts this resistance into the elastic force of the elastic member 6, and the standard springs corresponding to different series of refrigerators can be obtained through theoretical calculations to form a standard library, which is more accurately designed. After overcoming the resistance and opening the door, the door body 22 continues to rotate due to the inertia force. If the door body 22 is to be hovered arbitrarily, this inertia force needs to be overcome. At present, the method for realizing the hovering function of the door body 22 in the market is to add a pit design on one side and a convex design on the matching surface of the door closer 11 and the hinge 12, and to increase the friction force by adding the concave and convex surfaces to realize hovering. The disadvantage of the existing method is that the door closer 11 is a plastic part, and the door closer 11 is easily worn after long-term use, resulting in the failure of hovering. The hinge structure proposed by the present invention can complete the opening and closing door limit by itself, without using the traditional door closer 11, and solves the failure problem of the traditional door closer 11 caused by wear.

[0077] Based on the specific structure of the above refrigerator, the door body 22 hovering control method proposed in the present invention includes the following steps:

[0078] When the stopper 5 is in the stop state in the door opening direction, it is determined whether the opening angle of the door body 22 reaches the preset maximum door opening angle;

[0079] If yes, the stopper is directly controlled to switch to the stop state in the door closing direction;

[0080] If not, when it is detected that the thrust at the door handle reaches the preset door closing force and / or the temperature at the door handle reaches the preset temperature, the stopper is controlled to switch to the closing direction stop state.

[0081] In actual application, the door body 22 realizes arbitrary hovering principle in the process of opening and closing the door, and its conversion process is realized by the movement of the shifting member 7, which is described in the following two cases:

[0082] Case 1: When the user opens the door 22 to the limit position (generally set to 105 degrees), the built-in controller of the refrigerator sends a command to the driving member (such as a motor), and the driving member drives the shifting member 7 to move, changing the state of the stop member 5, so as to realize the hovering conversion in the opening / closing direction;

[0083] Case 2: After the door body 22 is opened, the user puts food into the box body 21 and prepares to close the door, but the door body 22 has not reached the limit position. Since the door handle of the door body 22 is equipped with a temperature sensor and a pressure sensor, when it is detected that the thrust at the door handle is higher than the preset closing force and the temperature at the door handle is higher than the preset value, the built-in controller of the refrigerator sends a command to the driving member (such as a motor), and the driving member drives the shifting member 7 to move, thereby changing the state of the stop member 5, and realizing the hovering conversion in the opening / closing direction.

[0084] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A hinge structure for connecting a box body and a door body, characterized in that: The hinge structure comprises: A mounting plate, arranged on the box body; A fixed housing is arranged on the door body and has a first accommodating position and a second accommodating position adjacent to each other; A rotating member, located in the first accommodation position, with two ends of the rotating member being rotatably connected to the door body and the mounting plate, and the outer side of the rotating member having a main serration portion; a rotation-stopping member, located in the second accommodation position and movably matched with the rotating member, wherein a side of the rotation-stopping member close to the rotating member has a matching serration portion; The elastic member is located in the second accommodating position and is slidably arranged on the side of the anti-rotation member away from the rotating member. When the elastic force of the elastic member is released, the anti-rotation member is pushed to the position where the matching serration part and the main serration part are engaged, so that the door body is suspended.

2. The hinge structure according to claim 1, characterized in that: The mating serration portion comprises a first mating serration portion and a second mating serration portion which are spaced apart on the same side of the stop member; wherein, when the first mating serration portion corresponds to the main serration portion, the stop member is in a door opening direction stop state, and when the second mating serration portion corresponds to the main serration portion, the stop member is in a door closing direction stop state; the stop member is switched between the door opening direction stop state and the door closing direction stop state by a switching component.

3. The hinge structure according to claim 2, characterized in that: The switching assembly includes a shifting member and a driving member, wherein the shifting member is partially inserted into the anti-rotation member, and the shifting member drives the rotating member to rotate under the action of the driving member, so that the rotating member switches between the anti-rotation state in the door opening direction and the anti-rotation state in the door closing direction.

4. The hinge structure according to claim 2, characterized in that: The anti-rotation member is provided with a first recessed portion and a second recessed portion on a side away from the rotating member, and a power ball is connected to one end of the elastic member; wherein, when the anti-rotation member is in a anti-rotation state in the door opening direction, the power ball is placed in the first recessed portion, and when the anti-rotation member is in a anti-rotation state in the door closing direction, the power ball is placed in the second recessed portion.

5. The hinge structure according to claim 1, characterized in that: The main sawtooth portion is located on at least part of the side surface of the rotating member, and the number of teeth in the main sawtooth portion is positively correlated with the maximum door opening angle.

6. The hinge structure according to claim 1, characterized in that: The fixed shell comprises a bottom box and a cover plate, the bottom box has the first accommodation position and the second accommodation position, and the cover plate is arranged at the opening of the bottom box.

7. The hinge structure according to claim 6, characterized in that: The bottom box is detachably connected to the cover plate via a plurality of bolts.

8. The hinge structure according to claim 1, characterized in that: The mounting plate is detachably connected to the box body via a plurality of screws.

9. A refrigerator, comprising a box body and a door body, characterized in that: The door body is rotatably connected to the box body via a hinge structure as described in any one of claims 1 to 8.

10. A door suspension control method, applied to the refrigerator as claimed in claim 9, characterized in that: include: When the anti-rotation member is in the anti-rotation state in the door opening direction, it is determined whether the opening angle of the door body reaches the preset maximum door opening angle; If yes, the stopper is directly controlled to switch to the stop state in the door closing direction; If not, when it is detected that the thrust at the door handle reaches the preset door closing force and / or the temperature at the door handle reaches the preset temperature, the stopper is controlled to switch to the closing direction stop state.

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