Automatic opening and closing mechanism and method for refrigerator door

Abstract

The present application provides an automatic opening and closing mechanism and method for a refrigerator door, the automatic opening and closing mechanism comprising: a door assembly, an opening and closing assembly, a sensing control device, and a hinge assembly; the opening and closing assembly is arranged on the door assembly, and the opening and closing assembly comprises a motor, a rocker mechanism, and a lock hook; the rocker mechanism is connected to the motor; the rocker mechanism is engaged with the lock hook; the lock hook can be engaged with the hinge assembly; the sensing control device is in communication with the motor. A door closing signal is obtained through the sensing control device; the distance between the hinge assembly and the sensing control device is detected; when the distance is greater than a first preset distance, the motor is driven according to the door closing signal to drive the lock hook to move; when the distance is less than or equal to the first preset distance, the motor is stopped from being driven. This solves the problem of safety risks in the automatic opening and closing of refrigerator doors.

Description

Technical Field

[0001] The present application relates to the technical field of refrigerators, and in particular to an automatic opening and closing mechanism and method for a refrigerator door. Background Art

[0002] The refrigerator door is pivotally connected to the refrigerator body through a hinge to facilitate access to items. In order to achieve automatic door opening, a door opening device is provided.

[0003] In the related technical solution, the refrigerator door can be pushed out by a motor-driven gear-driven push rod. However, although this method can open the refrigerator door intelligently, it is difficult to control the strength of the push rod. If there are too many items in the bottle frame in the refrigerator door, the refrigerator door cannot be pushed out. If there are too few items in the bottle frame in the refrigerator door, the force of the push rod will be too great, which can easily injure the user. In addition, the use of the push rod to open the door cannot achieve the automatic closing of the refrigerator door. The electromagnetic door can also be used to open the refrigerator door by placing an electromagnetic module inside the refrigerator door and the foam layer of the box. However, this solution is not only too expensive, but also occupies the foam layer of the refrigerator door and the box, affecting the thermal insulation effect and causing the risk of condensation on the surface. Summary of the Invention

[0004] The present application provides a refrigerator door automatic opening and closing mechanism and method to solve the problem of safety risks in the automatic opening and closing of the refrigerator door.

[0005] In a first aspect, the present application provides an automatic opening and closing mechanism for a refrigerator door, comprising: a door assembly, an opening and closing assembly, a sensing control device, and a hinge assembly. The opening and closing assembly is mounted on the door assembly and includes a motor, a rocker mechanism, and a lock hook; the rocker mechanism is connected to the motor; the rocker mechanism is engaged with the lock hook; the lock hook can be engaged with the hinge assembly; and the sensing control device is in communication with the motor.

[0006] The induction control device is configured to:

[0007] Get the door closing signal;

[0008] detecting a distance between the hinge assembly and the sensing control device;

[0009] When the distance is greater than a first preset distance, the motor is driven according to the door closing signal to drive the lock hook to move;

[0010] When the distance is less than or equal to the first preset distance, the motor is stopped from driving.

[0011] The motor is controlled to rotate by the sensing control device to drive the opening and closing assembly, and then the refrigerator door is opened and closed by the swing of the hook lock and the action and reaction force of the hinge assembly, so as to solve the problem of safety risks in the automatic opening and closing of the refrigerator door.

[0012] Optionally, the rocker mechanism includes a first gear, a second gear, a first connecting rod and a second connecting rod; the motor is connected to the first gear, the first gear is connected to the second gear, one side of the first connecting rod is engaged with the second gear, the other side of the first connecting rod is connected to one side of the second connecting rod, and the other side of the second connecting rod is engaged with the lock hook.

[0013] By controlling the motor to rotate and sequentially drive the first gear, the second gear, the first connecting rod, the second connecting rod and the hook lock, the hook lock can be made to swing within a preset track to realize automatic opening and closing of the refrigerator door.

[0014] Optionally, the first gear includes a first gear segment and a second gear segment, the first gear segment is fixedly connected to the second gear segment; the power output shaft of the motor is connected to a worm, and the worm is engaged with the first gear segment; the second gear segment is engaged with the third gear segment of the second gear.

[0015] By meshing the worm, the first gear segment, the second gear segment and the third gear segment in sequence, not only power can be transmitted but also direction-changing motion can be performed.

[0016] Optionally, the first connecting rod includes a first connecting rod surface and a second connecting rod surface, and the first connecting rod surface and the second connecting rod surface are symmetrical to each other; the second connecting rod surface is provided with a snap structure, and the snap structure is snap-engaged with the axis of the second gear.

[0017] The rotational motion transmitted by the second gear can be converted into reciprocating motion through the first connecting rod.

[0018] Optionally, a first clamping hole is provided at one end of the second connecting rod, a second clamping hole is provided at the other end of the second connecting rod, a connecting rod column is provided on the surface of the first connecting rod, and the connecting rod column is connected to the first clamping hole through a buckle; the lock hook is connected to the second clamping hole through a buckle.

[0019] The reciprocating motion transmitted from the first connecting rod can be used for steering through the second connecting rod.

[0020] Optionally, the lock hook member includes a lock hook column and a hook, and the lock hook column is connected to the second clamping hole through a snap buckle; the hook can be connected to the hinge assembly.

[0021] The lock hook member can be fixed on the second connecting rod through the lock hook column, and the hook is used to give the hinge assembly an action force and a reaction force, thereby realizing the opening and closing of the refrigerator door.

[0022] Optionally, the opening and closing assembly also includes an electromechanical box, which includes a motor slot, a first rotating shaft, a second rotating shaft and a third rotating shaft. The motor is arranged in the motor slot, the first rotating shaft is rotatably connected to the first gear, the second rotating shaft is rotatably connected to the second gear, and the third rotating shaft is rotatably connected to the lock hook; the hinge assembly includes a first axial hole, a second axial hole, and a third connecting shaft. The first rotating shaft is socketed with the first axial hole, the second rotating shaft is socketed with the second axial hole, one end of the third connecting shaft is socketed with the second rotating shaft, and the other end of the third connecting shaft is socketed with the third rotating shaft.

[0023] The electromechanical box is not only used to fix and protect the motor and the rocker mechanism, but also can be used to connect the hinge assembly.

[0024] Optionally, the door assembly includes a door body, a door end cover and a side trim;

[0025] The door body is a rectangular structure; the door body includes a horizontal side and a vertical side, the side trim is arranged on the vertical side of the door body, the door end cover is arranged on the horizontal side of the door body, and the opening and closing assembly is arranged on the door end cover.

[0026] By arranging the opening and closing assembly on the door end cover, the door body is connected to the opening and closing assembly, thereby driving the door body to open and close.

[0027] A second aspect of the present application provides a method for automatically opening and closing a refrigerator door, which is applied to the automatic opening and closing mechanism for the refrigerator door described in the first aspect. The method comprises:

[0028] Get the door closing signal;

[0029] Detecting the distance between the hinge assembly and the sensing control device;

[0030] When the distance is greater than a first preset distance, the motor is driven according to the door closing signal to drive the lock hook to move;

[0031] When the distance is less than or equal to the first preset distance, the motor is stopped from driving.

[0032] The above method can control the automatic closing of the refrigerator door through the door closing signal, and can also reduce the occurrence of the situation where the refrigerator door is not closed tightly.

[0033] Optionally, the method further includes:

[0034] Get the door opening signal;

[0035] detecting a distance between the hinge assembly and the sensing control device;

[0036] When the distance is less than a second preset distance, the motor is driven according to the door opening signal to drive the lock hook to move;

[0037] When the distance is greater than or equal to the second preset distance, the motor is stopped from driving.

[0038] The above method can control the automatic opening of the refrigerator door through the door opening signal. Since the opening range of the refrigerator door is limited by the second preset distance, it can also reduce the situation where the refrigerator door is opened too much and damages the refrigerator.

[0039] As can be seen from the above technical solutions, the present application provides an automatic opening and closing mechanism and method for a refrigerator door, the automatic opening and closing mechanism for a refrigerator door comprising: a door assembly, an opening and closing assembly, a sensing control device and a hinge assembly; the opening and closing assembly is arranged on the door assembly, and the opening and closing assembly comprises a motor, a rocker mechanism and a lock hook; the rocker mechanism is connected to the motor; the rocker mechanism is engaged with the lock hook; the lock hook can be engaged with the hinge assembly; the sensing control device is in communication connection with the motor. A door closing signal is obtained through the sensing control device; the distance between the hinge assembly and the sensing control device is detected; when the distance is greater than a first preset distance, the motor is driven according to the door closing signal to drive the lock hook to move; when the distance is less than or equal to the first preset distance, the motor is stopped from being driven. This solves the problem of safety risks in the automatic opening and closing of refrigerator doors. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solution of the present application, the following is a brief introduction to the drawings required for use in the embodiments. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0041] Figure 1 This is a schematic structural diagram of the automatic opening and closing mechanism of the refrigerator door according to an embodiment of the present application;

[0042] Figure 2 This is an enlarged schematic diagram of point A of the automatic opening and closing mechanism of the refrigerator door according to an embodiment of the present application;

[0043] Figure 3 This is a schematic diagram of the exploded structure of the automatic opening and closing mechanism of the refrigerator door according to an embodiment of the present application;

[0044] Figure 4This is a schematic structural diagram of the hinge assembly of the automatic opening and closing mechanism of the refrigerator door according to an embodiment of the present application;

[0045] Figure 5 This is a schematic cross-sectional view of the automatic opening and closing mechanism of a refrigerator door according to an embodiment of the present application;

[0046] Figure 6 This is an initial schematic diagram of the opening and closing component of the automatic opening and closing mechanism of the refrigerator door according to an embodiment of the present application in an open state or in the process of closing the door;

[0047] Figure 7 This is a schematic diagram of the opening and closing assembly of the automatic opening and closing mechanism of the refrigerator door according to an embodiment of the present application during the door closing process;

[0048] Figure 8 This is a schematic diagram of the opening and closing component of the automatic opening and closing mechanism of the refrigerator door according to an embodiment of the present application completing the door closing action or being in the door closing state;

[0049] Figure 9 This is a schematic diagram of the opening and closing assembly of the automatic opening and closing mechanism of the refrigerator door according to an embodiment of the present application during the door opening process;

[0050] Figure 10 This is a schematic diagram of the door closing process of the automatic opening and closing method of the refrigerator door according to an embodiment of the present application;

[0051] Figure 11 This is a schematic diagram of the door opening process of the automatic opening and closing method of the refrigerator door described in an embodiment of the present application.

[0052] Illustration:

[0053] Among them, 1-door assembly; 101-door end cover; 102-side trim; 2-opening and closing assembly; 201-electromechanical box; 2011-motor slot; 2012-first rotating shaft; 2013-second rotating shaft; 2014-third rotating shaft; 202-motor; 2021-worm; 203-first gear; 2031-first gear segment; 2032-second gear segment; 204-second gear; 204 1-third gear segment; 205-first connecting rod; 2051-buckle structure; 2052-connecting rod column; 206-second connecting rod; 2061-first clamping hole; 2062-second clamping hole; 207-lock hook; 2071-lock hook column; 2072-hook; 3-hinge assembly; 301-first shaft hole; 302-second shaft hole; 303-upper door mechanism connection part; 304-lower door mechanism connection part. DETAILED DESCRIPTION

[0054] The following embodiments are described in detail, with examples illustrated in the accompanying drawings. When the following description refers to the drawings, identical numerals in different figures represent identical or similar elements unless otherwise indicated. The embodiments described in the following embodiments are not intended to represent all possible implementations consistent with the present application. They are merely examples of systems and methods consistent with certain aspects of the present application, as detailed in the claims.

[0055] The refrigerator door is pivotally connected to the refrigerator body via a hinge to facilitate access to items. A door opening device is provided to enable automatic door opening. In some embodiments, a motor-driven gear-driven push rod can be used to push the refrigerator door out. However, while this method allows for intelligent door opening, it is difficult to control the force of the push rod. If too many items are placed in the refrigerator door, the door may not be pushed out. If too few items are placed in the refrigerator door, the force of the push rod may be too great, which can easily injure the user. Furthermore, using a push rod to open the door does not allow the refrigerator door to close automatically. In other embodiments, an electromagnetic door can be used to open the refrigerator door by placing an electromagnetic module inside the refrigerator door and the foam layer of the cabinet. However, this solution is not only costly, but also occupies the foam layer of the refrigerator door and the cabinet, affecting the insulation effect and creating a risk of condensation on the surface.

[0056] To solve the safety risk of automatic opening and closing of refrigerator doors, see Figure 1-Figure 5 ,in, Figure 1 This is a structural diagram of an automatic opening and closing mechanism for a refrigerator door; Figure 2 This is an enlarged schematic diagram of point A of an automatic opening and closing mechanism of a refrigerator door; Figure 3 This is a schematic diagram of the exploded structure of an automatic opening and closing mechanism for a refrigerator door; Figure 4 This is a schematic diagram of the hinge assembly structure of an automatic opening and closing mechanism for a refrigerator door; Figure 5 The figure is a schematic cross-sectional view of an automatic opening and closing mechanism for a refrigerator door.

[0057] Some embodiments of the present application provide an automatic opening and closing mechanism for a refrigerator door, comprising: a door assembly 1, an opening and closing assembly 2, a sensing control device, and a hinge assembly 3. The opening and closing assembly 2 is disposed on the door assembly 1 and includes a motor 202, a rocker mechanism, and a lock hook 207; the rocker mechanism is connected to the motor 202; the rocker mechanism is engaged with the lock hook 207; the lock hook 207 can be engaged with the hinge assembly 3; and the sensing control device is in communication with the motor 202.

[0058] It should be understood that the refrigerator may include multiple door assemblies 1 and opening / closing assemblies 2. For example, in a two-door refrigerator, the door assembly 1 includes an upper door assembly and a lower door assembly, and the opening / closing assembly 2 includes an upper door opening / closing assembly and a lower door opening / closing assembly. In some embodiments, the hinge assembly 3 includes an upper door mechanism connection portion 303 and a lower door mechanism connection portion 304; the upper door mechanism connection portion 303 connects to the upper door opening / closing assembly, and the lower door mechanism connection portion 304 connects to the lower door opening / closing assembly, thereby reducing costs.

[0059] The induction control device controls the rotation of the motor 202 to drive the opening and closing assembly 2. The refrigerator door is then opened and closed through the swinging of the hook lock member and the action and reaction of the hinge assembly 3, thereby resolving the safety risk associated with automatic opening and closing of the refrigerator door. The automatic refrigerator door opening and closing mechanism is also suitable for being embedded in a cabinet, providing greater convenience and aesthetics.

[0060] The rocker mechanism is based on the crank rocker principle. The distance between the axial center of the second gear 204 and the lock hook 207 is marked as bar 1, the distance between the axis of the lock hook 207 and the second engaging hole 2062 is marked as bar 2, the distance between the first engaging hole 2061 and the second engaging hole 2062 is marked as bar 3, and the distance between the axial center of the second engaging hole 2062 and the second gear 204 is marked as bar 4. Bar 4 can make a complete circular motion within bar 1, while bar 2 can only make a small arc of reciprocating motion within bar 1. The rotation of the motor 202 causes the first gear 203 and the second gear 204 to rotate in the same direction, driving the lock hook 207 to move, acting on the corresponding position of the hinge, allowing the refrigerator door to open and close.

[0061] See also Figure 10 , Figure 10 The figure is a schematic diagram of the closing process of a refrigerator door automatic opening and closing method. The induction control device is configured as follows:

[0062] Get the door closing signal;

[0063] detecting the distance between the hinge assembly 3 and the sensing control device;

[0064] When the distance is greater than a first preset distance, the motor 202 is driven according to the door closing signal to drive the lock hook 207 to move;

[0065] When the distance is less than or equal to the first preset distance, the motor 202 stops driving.

[0066] It should be understood that the sensing control device includes a controller and an infrared sensor, and the controller may optionally be a single-chip microcomputer. The sensing control device is located directly below or above the hinge assembly. The first preset distance can be set to the vertical distance at which the sensing control device sends the infrared signal to the hinge assembly 3 when the refrigerator door is closed. The location where the hinge assembly 3 contacts the infrared signal is marked as the distance measurement point.

[0067] In some embodiments, the rocker mechanism includes a first gear 203, a second gear 204, a first connecting rod 205 and a second connecting rod 206; the motor 202 is connected to the first gear 203, the first gear 203 is connected to the second gear 204, one side of the first connecting rod 205 is engaged with the second gear 204, the other side of the first connecting rod 205 is connected to one side of the second connecting rod 206, and the other side of the second connecting rod 206 is engaged with the lock hook 207.

[0068] See also Figure 6-Figure 9 ,in, Figure 6 This is an initial schematic diagram of an opening and closing component of an automatic opening and closing mechanism of a refrigerator door in an open state or in the process of closing the door; Figure 7 A schematic diagram of an opening and closing assembly of an automatic opening and closing mechanism for a refrigerator door during the door closing process; Figure 8 A schematic diagram of an opening and closing component of an automatic opening and closing mechanism for a refrigerator door having completed a door closing action or being in a door closing state; Figure 9 This is a schematic diagram of the opening and closing assembly of an automatic refrigerator door opening and closing mechanism during the door opening process. By controlling the rotation of the motor 202, the first gear 203, the second gear 204, the first connecting rod 205, the second connecting rod 206, and the hook lock member are sequentially driven, causing the hook lock member to swing within a preset track, thereby achieving automatic opening and closing of the refrigerator door.

[0069] In some embodiments, the first gear 203 includes a first gear segment 2031 and a second gear segment 2032, and the first gear segment 2031 is fixedly connected to the second gear segment 2032; the power output shaft of the motor 202 is connected to the worm 2021, and the worm 2021 is engaged with the first gear segment 2031; the second gear segment 2032 is engaged with the third gear segment 2041 of the second gear 204.

[0070] By meshing the worm 2021 , the first gear segment 2031 , the second gear segment 2032 and the third gear segment 2041 in sequence, not only power can be transmitted but also direction-changing motion can be performed.

[0071] In some embodiments, the first connecting rod 205 includes a first connecting rod surface and a second connecting rod surface, and the first connecting rod surface and the second connecting rod surface are symmetrical to each other; the second connecting rod surface is provided with a snap structure 2051, and the snap structure 2051 is snap-engaged with the axis of the second gear 204.

[0072] The rotational motion transmitted by the second gear 204 can be converted into reciprocating motion through the first connecting rod 205 .

[0073] In some embodiments, a first locking hole 2061 is provided at one end of the second connecting rod 206, and a second locking hole 2062 is provided at the other end of the second connecting rod 206. A connecting rod column 2052 is provided on the surface of the first connecting rod, and the connecting rod column 2052 is connected to the first locking hole 2061 through a snap fastener; the lock hook 207 is connected to the second locking hole 2062 through a snap fastener.

[0074] The reciprocating motion can be transferred from the first connecting rod 205 to the second connecting rod 206 for steering.

[0075] In some embodiments, the lock hook member 207 includes a lock hook column 2071 and a hook 2072 , and the lock hook column 2071 is engaged with the second clamping hole 2062 through a snap-fit; the hook 2072 can be engaged with the hinge assembly 3 .

[0076] The lock hook member 207 can be fixed on the second connecting rod 206 through the lock hook column 2071, and the hook 2072 is used to give the hinge assembly 3 an action force and a reaction force, thereby realizing the opening and closing of the refrigerator door.

[0077] See also Figure 3-Figure 4 In some embodiments, the opening and closing component 2 also includes an electromechanical box 201, the electromechanical box 201 includes a motor slot 2011, a first rotating shaft 2012, a second rotating shaft 2013 and a third rotating shaft 2014, the motor 202 is arranged in the motor slot 2011, the first rotating shaft 2012 is rotatably connected to the first gear 203, the second rotating shaft 2013 is rotatably connected to the second gear 204, and the third rotating shaft 2014 is rotatably connected to the lock hook 207; the hinge component 3 includes a first axial hole 301, a second axial hole 302, and a third connecting shaft, the first rotating shaft 2012 is socketed with the first axial hole 301, the second rotating shaft 2013 is socketed with the second axial hole 302, one end of the third connecting shaft is socketed with the second rotating shaft 2013, and the other end of the third connecting shaft is socketed with the third rotating shaft 2014.

[0078] The electromechanical box 201 is not only used to fix and protect the motor 202 and the rocker mechanism, but also can be used to connect the hinge assembly 3 .

[0079] In some embodiments, the door assembly 1 includes a door body, a door end cover 101 and a side trim 102;

[0080] The door body is a rectangular structure; the door body includes a horizontal side and a vertical side, the side trim 102 is arranged on the vertical side of the door body, the door end cover 101 is arranged on the horizontal side of the door body, and the opening and closing component 2 is arranged on the door end cover 101.

[0081] By arranging the opening and closing assembly 2 on the door end cover 101 , the door body is connected to the opening and closing assembly 2 , thereby driving the door body to open and close.

[0082] Some embodiments of the present application also provide a method for automatically opening and closing a refrigerator door, which is applied to the automatic opening and closing mechanism of the refrigerator door described in the above embodiment. Figure 10 , the method comprising:

[0083] S110: Obtain a door closing signal.

[0084] S120: Detecting the distance between the hinge assembly 3 and the sensing control device.

[0085] S130: When the distance is greater than the first preset distance, the motor 202 is driven according to the door closing signal to drive the lock hook 207 to move.

[0086] S140: When the distance is less than or equal to the first preset distance, stop driving the motor 202.

[0087] It should be understood that the sensing control device includes a controller and an infrared sensor, and the controller can optionally be a single-chip microcomputer. The sensing control device is located directly below or above the hinge assembly. The first preset distance can be set to the vertical distance at which the sensing control device sends the infrared signal to the hinge assembly 3 when the refrigerator door is closed. The position where the hinge assembly 3 contacts the infrared signal is marked as the ranging point. The above method can control the automatic closing of the refrigerator door through the door closing signal, and can also reduce the occurrence of the refrigerator door not closing tightly.

[0088] In some embodiments, see Figure 11 , the method further comprises:

[0089] S210: Obtain a door opening signal.

[0090] S220: Detecting the distance between the hinge assembly 3 and the sensing control device.

[0091] S230: When the distance is less than a second preset distance, the motor 202 is driven according to the door opening signal to drive the lock hook 207 to move.

[0092] S240: When the distance is greater than or equal to the second preset distance, stop driving the motor 202.

[0093] It should be understood that the first preset distance can be set to the shortest distance between the sensing control device and the distance-measuring point of the hinge assembly 3 when the refrigerator door is opened. The above method can control the automatic opening of the refrigerator door by the door opening signal. Since the opening range of the refrigerator door is limited by the second preset distance, it can also reduce the possibility of the refrigerator door being opened too far and damaging the refrigerator.

[0094] In some embodiments, the induction control device can be connected to a contact sensor, a voice receiver or a terminal. The user can control the opening or closing of the refrigerator door through door opening instructions, knocking or voice.

[0095] As can be seen from the above technical solutions, the present invention provides an automatic refrigerator door opening and closing mechanism and method. The mechanism comprises: a door assembly 1, an opening and closing assembly 2, a sensing control device, and a hinge assembly 3. The opening and closing assembly 2 is disposed on the door assembly 1 and includes a motor 202, a rocker mechanism, and a lock hook 207. The rocker mechanism is connected to the motor 202 and engages with the lock hook 207. The lock hook 207 can engage with the hinge assembly 3. The sensing control device is in communication with the motor 202. The sensing control device receives a door closing signal and detects the distance between the hinge assembly 3 and the sensing control device. When the distance is greater than a first preset distance, the motor 202 is driven according to the door closing signal to move the lock hook 207. When the distance is less than or equal to the first preset distance, the motor 202 is stopped. This mechanism addresses the safety risks associated with automatic refrigerator door opening and closing.

[0096] Similar parts between the embodiments provided in this application can be referenced to each other. The specific implementation methods provided above are only a few examples under the overall concept of this application and do not constitute a limitation on the scope of protection of this application. For those skilled in the art, any other implementation methods expanded based on the scheme of this application without expending creative work shall fall within the scope of protection of this application.

Claims

1. An automatic opening and closing mechanism for a refrigerator door, characterized in that: include: Door body assembly (1), opening and closing assembly (2), induction control device and hinge assembly (3); The opening and closing assembly (2) is arranged on the door body assembly (1), and the opening and closing assembly (2) comprises a motor (202), a rocker mechanism, and a lock hook (207); the rocker mechanism is connected to the motor (202); the rocker mechanism is engaged with the lock hook (207); the lock hook (207) can be engaged with the hinge assembly (3); the induction control device is communicatively connected to the motor (202); the induction control device is configured as follows: Get the door closing signal; detecting the distance between the hinge assembly (3) and the sensing control device; When the distance is greater than a first preset distance, the motor (202) is driven according to the door closing signal to drive the lock hook (207) to move; When the distance is less than or equal to the first preset distance, stopping driving the motor (202); The rocker mechanism comprises a first gear (203), a second gear (204), a first connecting rod (205) and a second connecting rod (206); The motor (202) is connected to the first gear (203), the first gear (203) is connected to the second gear (204), one side of the first connecting rod (205) is engaged with the second gear (204), the other side of the first connecting rod (205) is connected to one side of the second connecting rod (206), and the other side of the second connecting rod (206) is engaged with the lock hook (207); The first connecting rod (205) includes a first connecting rod surface and a second connecting rod surface, and the first connecting rod surface and the second connecting rod surface are symmetrical to each other; the second connecting rod surface is provided with a snap-fit ​​structure (2051), and the snap-fit ​​structure (2051) is snap-fitted with the axis of the second gear (204); One end of the second connecting rod (206) is provided with a first clamping hole (2061), and the other end of the second connecting rod (206) is provided with a second clamping hole (2062). A connecting rod column (2052) is provided on the surface of the first connecting rod, and the connecting rod column (2052) is connected to the first clamping hole (2061) by a buckle; the locking hook (207) is connected to the second clamping hole (2062) by a buckle; The lock hook member (207) comprises a lock hook column (2071) and a hook (2072); the lock hook column (2071) is engaged with the second clamping hole (2062) via a snap fastener; and the hook (2072) can be engaged with the hinge assembly (3).

2. The automatic opening and closing mechanism of the refrigerator door according to claim 1, characterized in that: The first gear (203) comprises a first gear segment (2031) and a second gear segment (2032), wherein the first gear segment (2031) is fixedly connected to the second gear segment (2032); the power output shaft of the motor (202) is connected to a worm (2021), and the worm (2021) is meshed with the first gear segment (2031); and the second gear segment (2032) is meshed with the third gear segment (2041) of the second gear (204).

3. The automatic opening and closing mechanism of the refrigerator door according to claim 1, characterized in that: The opening and closing assembly (2) further comprises an electromechanical box (201), the electromechanical box (201) comprising a motor slot (2011), a first rotating shaft (2012), a second rotating shaft (2013) and a third rotating shaft (2014), the motor (202) being arranged in the motor slot (2011), the first rotating shaft (2012) being rotationally connected to the first gear (203), the second rotating shaft (2013) being rotationally connected to the second gear (204), and the third rotating shaft (2014) being rotationally connected to the second gear (204). The shaft (2014) is rotatably connected to the lock hook member (207); the hinge assembly (3) includes a first shaft hole (301), a second shaft hole (302), and a third connecting shaft; the first rotating shaft (2012) is sleeved with the first shaft hole (301), the second rotating shaft (2013) is sleeved with the second shaft hole (302), one end of the third connecting shaft is sleeved with the second rotating shaft (2013), and the other end of the third connecting shaft is sleeved with the third rotating shaft (2014).

4. The automatic opening and closing mechanism of the refrigerator door according to claim 1, characterized in that: The door assembly (1) comprises a door body, a door end cover (101) and a side trim (102); The door body is a rectangular parallelepiped structure; the door body includes a horizontal side and a vertical side, the side trim (102) is arranged on the vertical side of the door body, the door end cover (101) is arranged on the horizontal side of the door body, and the opening and closing assembly (2) is arranged on the door end cover (101).

5. A method for automatically opening and closing a refrigerator door, characterized in that: Applicable to the automatic opening and closing mechanism for a refrigerator door according to any one of claims 1 to 4, the method comprising: Get the door closing signal; detecting the distance between the hinge assembly (3) and the sensing control device; When the distance is greater than a first preset distance, the motor (202) is driven according to the door closing signal to drive the lock hook (207) to move; When the distance is less than or equal to the first preset distance, the motor (202) is stopped from driving.

6. The automatic opening and closing method of a refrigerator door according to claim 5, characterized in that: The method further comprises: Get the door opening signal; detecting the distance between the hinge assembly (3) and the sensing control device; When the distance is less than a second preset distance, the motor (202) is driven according to the door opening signal to drive the lock hook (207) to move; When the distance is greater than or equal to the second preset distance, the motor (202) is stopped from driving.

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