Refrigerator

Abstract

The application relates to the technical field of refrigeration equipment, in particular to a refrigerator. The refrigerator of the application is characterized in that a driving motor is used in the door opening and closing mechanism, which can drive the ejection assembly to perform the ejection action of the door body and drive the rotating assembly to perform the rotating opening action of the door body, thereby reducing the number of parts, simplifying the mechanical structure, and integrating the structure of the door opening and closing mechanism. The sliding fit between the arc-shaped hole of the first gear and the convex column of the second gear realizes the disconnection and connection functions of the clutch, and the electromagnetic clutch does not need to be additionally arranged, which can reduce the cost and the complexity of control. When the door is manually opened and closed, the convex column can slide in the arc-shaped hole, disconnect the first gear and the second gear, decouple the transmission between the second gear and the driving motor, and ensure that the user can open and close the door without motor resistance. When the door is automatically opened and closed, the abutment between the convex column and the end of the arc-shaped hole realizes the connection of the first gear and the second gear.

Description

Technical Field

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

[0002] As a device for storing items at low temperatures, the way the refrigerator's door opens and closes directly affects the convenience of use. Some refrigerators have an automatic door opening and closing function. The actuator for the automatic door opening and closing of the refrigerator compartment needs to support both automatic and manual modes driven by a motor.

[0003] In related technologies, the door opening and closing mechanism has two actuators. One actuator pushes the door open, overcoming the door seal suction and the pressure difference between the inside and outside, making the door rotate more smoothly. The other actuator drives the door to the open position, and this actuator typically uses an electromagnetic clutch as its core component. An electromagnetic clutch is installed between the motor and the transmission mechanism. When automatic mode is required, the electromagnetic clutch engages, and the motor torque is transmitted to the hinge shaft through the transmission mechanism, driving the door to rotate. When the user manually operates the door, the electromagnetic clutch disengages, separating the motor from the transmission system to prevent motor resistance from affecting manual operation.

[0004] However, the door opening and closing mechanism in the relevant technology has a complex structure, requiring simultaneous control of the electromagnetic clutch and two actuators, resulting in complex control logic and high cost. Utility Model Content

[0005] This application provides a refrigerator with a simple door opening and closing mechanism, simple control logic, and low cost.

[0006] In a first aspect, embodiments of this application provide a refrigerator, which includes:

[0007] The box-like structure forms a storage compartment;

[0008] The door is connected to the cabinet via a door opening and closing mechanism to open or close the storage compartment;

[0009] The door opening and closing mechanism includes:

[0010] Drive motor;

[0011] The ejector assembly is configured to push open the door under the drive of the drive motor, so as to separate the door from the housing;

[0012] A rotating assembly, connected to the door body, is configured to rotate the door body relative to the housing under the drive of the drive motor;

[0013] A first gear is rotatably mounted on the housing, and the first gear is provided with an arc-shaped hole that extends around the rotation center of the first gear; the first gear is connected to the output end of the drive motor.

[0014] The second gear is coaxially arranged with the first gear and rotatably mounted on the housing; the second gear is provided with a protrusion, which slides in conjunction with the arc-shaped hole; the second gear is connected to the ejector assembly and the rotating assembly respectively.

[0015] When the door is manually opened or closed, the protruding post slides along the arc-shaped hole;

[0016] When the door opens and closes automatically, the protruding post abuts against the end of the arc-shaped hole, and the drive motor is configured to start, driving the ejection assembly and the rotating assembly to move through the first gear and the second gear.

[0017] The refrigerator in this embodiment uses a drive motor for the door opening and closing mechanism. This motor can drive the push-out component to open the door and also drive the rotating component to open the door by rotating it. This reduces the number of parts, simplifies the mechanical structure, and makes the door opening and closing mechanism highly integrated.

[0018] By utilizing the sliding engagement of the arc-shaped hole of the first gear and the protrusion of the second gear, the clutch can be disengaged and engaged, eliminating the need for an additional electromagnetic clutch. This reduces both cost and control complexity.

[0019] When the door is manually opened and closed, the protruding post can slide within the arc-shaped hole, disconnecting the connection between the first and second gears. This decouples the transmission between the second gear and the drive motor, ensuring that the user can open and close the door without motor resistance. During automatic opening and closing, the protruding post abuts against the end of the arc-shaped hole, connecting the first and second gears. The force of the drive motor is transmitted through the first gear to the second gear, and then to the ejector and rotating components. Only the drive motor needs to be controlled, simplifying the control logic and reducing the failure rate.

[0020] The door opening and closing mechanism of this application has a simple structure, low cost, simple control logic, and high reliability, providing a cost-effective and highly reliable solution for automatic door opening and closing functions.

[0021] In some embodiments of this application, the arc-shaped hole has a first end and a second end opposite to each other along its extension direction; when the protrusion abuts against the first end of the arc-shaped hole, the drive motor is configured to rotate about a first direction to open the door through the ejection assembly and the rotation assembly;

[0022] When the protruding post abuts against the second end of the arc-shaped hole, the drive motor is configured to rotate about a second direction to close the door via the ejection assembly and the rotation assembly;

[0023] The second direction is opposite to the first direction.

[0024] By rotating the drive motor in both directions, a single drive motor can be used to push the door open and rotate the door, resulting in a simple control logic. Furthermore, the precise triggering of the opening and closing actions is ensured by the contact between the two different ends of the protruding post and the arc-shaped hole.

[0025] In some embodiments of this application, the drive motor is configured to drive the first gear to rotate, so that the protrusion moves between the first end and the second end of the arc-shaped hole.

[0026] The position of the protruding post within the arc-shaped hole is adjusted using a drive motor, enabling programmed switching between manual and automatic modes. Furthermore, the drive motor can be configured to, after opening or closing the door, drive the first gear to move the protruding post to the end of the arc-shaped hole for resetting, ensuring that the door can be opened and closed either electrically or manually the next time.

[0027] In some embodiments of this application, a detector is provided on the housing, and a trigger is provided on the first gear;

[0028] The detector is configured to be triggered by the trigger when the protrusion moves to the first and second ends of the arc-shaped hole, so as to send a detection signal to control the drive motor to turn off.

[0029] In this embodiment, by setting a detector and a trigger to control the timing of the closing of the drive motor when adjusting the relative position of the protrusion and the arc-shaped hole, the drive motor is ensured to stop immediately when the protrusion abuts the end of the arc-shaped hole, thus avoiding overshoot and improving system reliability.

[0030] In some embodiments of this application, the second gear is provided with a first tooth and a second tooth, the first tooth meshing with the rotating assembly, and the second tooth meshing with the ejector assembly;

[0031] The module of the second tooth is greater than the module of the first tooth.

[0032] The first tooth, which meshes with the rotating component, has a smaller module, making it suitable for light-load rotational motions. The second tooth, which meshes with the ejector component, has a larger module, enabling it to withstand the high loads of ejection. This module-differentiated design optimizes both the strength and cost of the gear set.

[0033] In some embodiments of this application, the first gear and the drive motor are connected by gear transmission, and the first gear and the ejection assembly are plastic parts, and the transmission gear between the first gear and the drive motor is a plastic gear;

[0034] The second gear and the gear of the rotating assembly are metal gears.

[0035] In this embodiment, the first gear and the transmission gear between the first gear and the drive motor are made of plastic gears for low-load transmission, reducing weight and cost; the second gear and the gears of the rotating assembly are made of metal gears for high-load rotation drive, ensuring durability and strength, and balancing cost and performance.

[0036] In some embodiments of this application, the ejection assembly includes an ejector rod and a rack, the rack being fixedly connected to the ejector rod and meshing with the second gear, and the ejector rod being slidably connected to the housing along the depth direction of the housing.

[0037] In this embodiment, the rack and the second gear mesh directly, so that the force of the second gear is directly transmitted to the rack, driving the push rod to move, resulting in a simple structure.

[0038] In some embodiments of this application, the rotating component includes:

[0039] The third gear is rotatably mounted on the housing and meshes with the second gear;

[0040] The fourth gear is rotatably mounted on the housing and meshes with the third gear;

[0041] A rotating rod is provided, one end of which is mounted on the fourth gear so that the rotating rod rotates under the drive of the fourth gear; the other end of the rotating rod is connected to the door body.

[0042] In this embodiment, the rotating component uses multi-stage gear transmission to increase the reduction ratio, ensuring that the drive motor can drive the door to rotate smoothly and reducing vibration during the opening and closing process.

[0043] In some embodiments of this application, the door opening and closing mechanism further includes a transmission gear set, which includes at least one transmission gear; the drive motor is connected to the first gear via the transmission gear set.

[0044] In this way, the motor output speed and torque can be flexibly adjusted by increasing or decreasing the number of transmission gears or their teeth to adapt to different door models. The transmission gear set can change the direction of power transmission, facilitating the optimization of the motor's position within the housing.

[0045] Secondly, embodiments of this application provide a refrigerator, which includes:

[0046] The box-like structure forms a storage compartment;

[0047] The door is connected to the cabinet via a door opening and closing mechanism to open or close the storage compartment;

[0048] The door opening and closing mechanism includes:

[0049] Drive motor;

[0050] The ejector assembly is configured to push open the door under the drive of the drive motor, so as to separate the door from the housing;

[0051] A rotating assembly is configured to rotate the door relative to the housing under the drive of the drive motor;

[0052] A first gear is rotatably mounted on the housing, and the first gear is provided with an arc-shaped hole that extends around the rotation center of the first gear; the first gear is connected to the output end of the drive motor.

[0053] The second gear is coaxially arranged with the first gear and rotatably mounted on the housing; the second gear is provided with a protrusion, which slides in conjunction with the arc-shaped hole; the second gear is connected to the ejector assembly and the rotating assembly respectively.

[0054] The door has an automatic mode and a manual mode; the drive motor is configured to drive the first gear to rotate, thereby causing the protrusion to slide relative to the arc-shaped hole; when the second gear rotates independently of the first gear, the door is in the manual mode; when the second gear rotates synchronously with the first gear, the door is in the automatic mode.

[0055] The drive motor in this embodiment can not only provide driving force for the ejection assembly and the rotating assembly, but also provide driving force for the switching between automatic and manual modes, realizing the switching between automatic and manual door opening and closing, ensuring the ejection door and the rotating door, integrating multiple functions, further simplifying the structure of the door opening and closing mechanism, and reducing costs; moreover, it only requires controlling the forward and reverse rotation of the drive motor and the running time, further simplifying the control logic. Attached Figure Description

[0056] Figure 1 A top view of a refrigerator provided in an embodiment of this application;

[0057] Figure 2 Exploded views of door opening and closing mechanisms provided in some embodiments of this application;

[0058] Figure 3 for Figure 2 Partial top view of the door opening and closing mechanism in both open and closed states;

[0059] Figure 4 for Figure 2 Top view of the central door opening and closing mechanism in the closed state;

[0060] Figure 5 for Figure 2 Top view of the central door opening mechanism when it is open;

[0061] Figure 6 for Figure 2 Top view of the central door opening and closing mechanism after it has been opened and is now reset;

[0062] Figure 7 for Figure 2 A top view of the door opening mechanism during the opening process;

[0063] Figure 8 for Figure 2 Top view of the central door opening / closing mechanism in the open position;

[0064] Figure 9 for Figure 2 Top view of the central door opening and closing mechanism when closed;

[0065] Figure 10 for Figure 2 Top view of the door opening and closing mechanism after it has been closed and is now reset.

[0066] Explanation of reference numerals in the attached figures:

[0067] 100: Box body; 200: Door body; 300: Door opening and closing mechanism; 310: Drive motor;

[0068] 320: Ejector assembly; 321: Ejector rod; 322: Rack and pinion;

[0069] 330: Rotating assembly; 331: Third gear; 3311: Second shaft; 332: Fourth gear; 333: Rotating rod;

[0070] 340: First gear; 341: First shaft; 342: Arc-shaped hole; 3421: First end; 3422: Second end;

[0071] 350: Second gear; 351: Protrusion; 352: First tooth; 353: Second tooth;

[0072] 360: Installation box; 361: First box body; 3611: Slide groove; 362: Second box body;

[0073] 370: Transmission gear set; 371: Fifth gear; 372: Sixth gear; 373: Seventh gear; 374: Eighth gear; 375: Ninth gear; 376: Third shaft; 377: Fourth shaft;

[0074] 380: Detector. Detailed Implementation

[0075] It should be noted that the brief descriptions of terms in this application are only for the convenience of understanding the embodiments described below, and are not intended to limit the embodiments of this application. Unless otherwise stated, these terms should be understood in their ordinary and common meaning.

[0076] The terms "first," "second," "third," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar or related objects or entities, and do not necessarily imply a specific order or sequence, unless otherwise specified. It should be understood that such terms are interchangeable where appropriate.

[0077] The terms “comprising” and “having”, and any variations thereof, are intended to cover but not exclude inclusion, for example, a product or device that includes a range of components is not necessarily limited to all of the components that are clearly listed, but may include other components that are not clearly listed or that are inherent to such product or device.

[0078] As one of the core appliances in a family kitchen, the way the refrigerator's crisper door opens and closes directly affects user convenience. Traditional refrigerator doors typically rely on manual opening and closing by the user. However, with the development of smart home technology, automatic door opening and closing functions are gradually becoming standard features in mid-to-high-end refrigerators. This function uses an actuator to drive the door to rotate or slide, achieving automatic opening and closing. Especially when hands are inconvenient (such as when holding a child or carrying heavy objects), users can open and close the door without manual operation.

[0079] In related technologies, the actuators for automatic door opening and closing in refrigerator compartments need to support both automatic mode (driven by a motor) and manual mode (directly operated by the user), which places high demands on the structural design of the actuators. For example, in manual mode, if the actuator's transmission system is not disconnected from the motor, the user will experience significant resistance when operating the door, affecting the user experience; while in automatic mode, the motor needs to provide sufficient driving force through a complex transmission structure.

[0080] Therefore, how to reduce the cost and complexity of actuators while ensuring compatibility between automatic and manual modes has become a pressing technical challenge in refrigerator design.

[0081] The automatic door opening and closing structure is not only suitable for household refrigerators, but can also be extended to commercial cold chain equipment, medical refrigeration equipment and other fields, which puts forward higher requirements for the reliability, cost control and space adaptability of actuators.

[0082] Typically, door opening and closing mechanisms have two actuators. One actuator pushes the door open, overcoming the door seal suction and the pressure difference between the inside and outside, allowing the door to rotate more smoothly. The other actuator drives the door to the open position, and this actuator usually uses an electromagnetic clutch as its core component, with an electromagnetic clutch placed between the motor and the transmission mechanism. When automatic mode is required, the electromagnetic clutch engages, and the motor's torque is transmitted to the hinge shaft through the transmission mechanism, driving the door to rotate. When the user manually operates the door, the electromagnetic clutch disengages, separating the motor from the transmission system to prevent motor resistance from affecting manual operation.

[0083] However, this makes the door opening and closing mechanism complex, requiring simultaneous control of the electromagnetic clutch and two actuators, resulting in complex control logic and high costs.

[0084] In view of this, the door opening and closing mechanism of this application embodiment is equipped with a drive motor, which, in conjunction with the intermittent engagement of gears, realizes the function of a clutch. The drive motor can both drive the door to rotate and drive the mechanism to open the door. Furthermore, the intermittent engagement of the gears driven by the motor enables adjustment between automatic and manual door opening and closing. This not only simplifies the structure and reduces costs, but also requires only the control of the drive motor, resulting in simple control logic.

[0085] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0086] Reference Figure 1 This application provides a refrigerator, which includes a cabinet 100. The cabinet 100 can be configured to form a storage compartment with a front opening for storing items.

[0087] The storage compartments can be multiple to expand storage space. Depending on the storage temperature, the storage compartments can include at least one refrigerated compartment and at least one frozen compartment. The internal temperature of the refrigerated compartment can be maintained between approximately 0°C and 5°C for storing items in refrigerated mode; the internal temperature of the frozen compartment can be maintained between approximately -30°C and 0°C for storing items in frozen mode.

[0088] In some possible implementations, at least one of the storage compartments may also be configured as a vacuum chamber or a variable temperature chamber, etc.

[0089] The refrigerator in this embodiment may also include a door 200, which is hinged to the cabinet 100 to open or close the storage compartment.

[0090] When there are multiple storage rooms, each storage room can be equipped with one door 200, or two doors 200 can be equipped with one door 200. The two doors 200 rotate in opposite directions to open or close the storage room.

[0091] Continue to refer to Figure 1 In this embodiment of the application, the door 200 is connected to the box 100 through the door opening and closing mechanism 300 to open or close the storage room.

[0092] exist Figure 1 The illustration takes the connection between the door 200 of the refrigerator compartment and the cabinet 100 via the door opening and closing mechanism 300 as an example. However, this is not a limitation on the position of the door opening and closing mechanism 300. For example, the door 200 of the freezer compartment can also be connected to the cabinet 100 via the door opening and closing mechanism 300.

[0093] Combination Figure 2 In this embodiment of the application, the door opening and closing mechanism 300 includes a drive motor 310, which serves as the clicking device of the door opening and closing mechanism 300 and can be a DC motor or a stepper motor, etc.

[0094] For example, the drive motor 310 is a DC motor, which can precisely control the movement of the transmission mechanism, achieve a rapid response between manual and automatic switching, and adapt to the frequent actions of automatic door opening and closing.

[0095] In this embodiment, the output shaft of the drive motor 310 can be arranged perpendicular to the top surface of the housing 100. Thus, gears can be directly arranged on the output shaft of the drive motor 310 to achieve transmission. Furthermore, the gears are arranged parallel to the top surface of the housing 100, providing ample space for accommodating gears of different diameters.

[0096] In this embodiment of the application, the drive motor 310 can rotate in both the forward and reverse directions.

[0097] Continue to refer to Figure 2 The door opening and closing mechanism 300 may also include an ejector assembly 320, which is configured to eject the door 200 under the drive of the drive motor 310 so as to separate the door 200 from the housing 100.

[0098] The ejector assembly 320 converts the rotational motion of the drive motor 310 into linear motion, moves along the depth direction of the housing 100, and extends to the front of the housing 100 to open the door 200.

[0099] When the refrigerator is in operation, due to the air pressure difference inside and outside the cabinet 100 and the suction force of the door seal, a large force is required to open the door. Therefore, the door opening and closing mechanism 300 is equipped with a push-out component 320, which extends along the depth direction of the cabinet 100 to the front side of the cabinet 100 under the drive of the drive motor 310, so as to push open the door 200 and separate the door 200 from the cabinet 100.

[0100] Continue to refer to Figure 2 The door opening and closing mechanism 300 may also include a rotating assembly 330 connected to the door body 200. The rotating assembly 330 is configured to rotate the door body 200 relative to the housing 100 under the drive of the drive motor 310.

[0101] Therefore, the door opening and closing mechanism 300 of this embodiment utilizes a drive motor 310 to drive the ejector assembly 320 to move along the depth direction of the housing 100 to open the door 200; it can also drive the rotating assembly 330 to rotate the door 200 relative to the housing 100. This not only simplifies the structure and reduces costs, but also makes the opening process of the door 200 smoother.

[0102] It should be noted that, in this embodiment, the drive motor 310 can simultaneously drive the ejector assembly 320 and the rotating assembly 330 to open the door 200. Alternatively, depending on the configuration of the transmission assembly or intermittent structure, under the drive of the drive motor 310, the ejector assembly 320 first pushes open the door 200, and then the rotating assembly 330 rotates to open the door 200.

[0103] In some possible implementations, during automatic door opening and closing, the drive motor 310 simultaneously drives the ejector assembly 320 and the rotating assembly 330 via a transmission component. However, due to assembly and manufacturing errors, transmission errors, etc., the forces of the ejector assembly 320 and the rotating assembly 330 do not act on the door 200 simultaneously. For example, when opening the door, the force of the rotating assembly 330 acts on the door 200 first. However, because a large force is required at the moment of opening, the rotational force of the rotating assembly 330 cannot open the door 200 alone. Only when the ejector force of the ejector assembly 320 is transmitted to the door 200, causing the ejector assembly 320 to extend and open the door 200, does the rotating assembly 330 drive the door 200 to rotate. This time difference is very brief and its impact on the smoothness of the door 200's opening and closing is negligible.

[0104] Continue to refer to Figure 2The door opening and closing mechanism 300 may also include a first gear 340, which is rotatably mounted on the housing 100.

[0105] For example, a first shaft 341 is provided on the top surface of the housing 100, and a first gear 340 is rotatably mounted on the first shaft 341, so that the first gear 340 rotates relative to the housing 100.

[0106] The first gear 340 is connected to the output end of the drive motor 310, so that the drive motor 310 can drive the first gear 340 to rotate around its center.

[0107] Continue to refer to Figure 2 The first gear 340 is provided with an arc-shaped hole 342, which extends around the rotation center of the first gear 340. The arc-shaped hole 342 extends through the axial dimension of the first gear 340.

[0108] like Figure 2 As shown, the door opening and closing mechanism 300 may also include a second gear 350, which is coaxially arranged with the first gear 340 and rotatably mounted on the housing 100.

[0109] For example, the second gear 350 is rotatably mounted on the first shaft 341, so that the second gear 350 and the first gear 340 are arranged coaxially.

[0110] The second gear 350 is provided with a protrusion 351, which slides in engagement with the arc-shaped hole 342. When the protrusion 351 slides within the arc-shaped hole 342, the second gear 350 can rotate independently of the first gear 340. When the protrusion 351 abuts against one end of the arc-shaped hole 342, the first gear 340 can drive the second gear 350 to rotate in a direction away from the other end of the arc-shaped hole 342.

[0111] The protrusion 351 can be an arc-shaped protrusion extending along the rotation center of the second gear 350. This arrangement can provide the engagement length between the protrusion 351 and the arc-shaped hole 342, thereby increasing the stability of the engagement between the first gear 340 and the second gear 350.

[0112] The second gear 350 is connected to the ejector assembly 320 and the rotating assembly 330 respectively, so that a drive motor 310 can drive the ejector assembly 320 to perform the opening action of the door 200, and also drive the rotating assembly 330 to perform the rotating opening action of the door 200.

[0113] Of course, in some possible implementations, the first gear 340 may be provided with a protrusion 351, while the second gear 350 may be provided with an arc-shaped hole 342.

[0114] In this embodiment, the transmission gears in the door opening and closing mechanism 300, including the first gear 340 and the second gear 350, are all axially perpendicular to the top surface of the housing 100. This arrangement creates a planar transmission system parallel to the top surface of the housing 100, achieving a flattened layout and reducing the space occupied in the depth direction of the housing 100.

[0115] Moreover, relative to the horizontal shaft, the gear's shaft is perpendicular to the top surface of the housing 100, and the gear's weight and axial force can both be borne by the bearing end face, resulting in low transmission resistance.

[0116] Furthermore, since the arc-shaped hole 342 and the protrusion 351 operate in the horizontal plane, gravity has almost no effect on the sliding of the protrusion 351 in the arc-shaped hole 342, making the switching action more precise and reliable.

[0117] Continue to refer to Figure 2 The door opening and closing mechanism 300 of this application embodiment may also include a mounting box 360, which is fixed to the top surface of the housing 100 and is configured to form an installation space for mounting the drive motor 310, the first gear 340, the second gear 350, and a portion of the ejection assembly 320 and a portion of the rotation assembly 330.

[0118] The mounting box 360 may include a first box body 361 and a second box body 362. The first box body 361 is fixed to the top surface of the box body 100, and the second box body 362 is located above the first box body 361 and is fixedly connected to the first box body 361 to enclose and form an installation space.

[0119] The first shaft 341 may be formed on the first housing 361 to facilitate the installation of the first gear 340 and the second gear 350.

[0120] An opening is provided on the front side of the mounting box 360, and the opening is opposite to the ejector assembly 320 along the depth direction of the box 100, so that the ejector assembly 320 can extend through the opening to the outside of the mounting box 360 to push open the door 200.

[0121] In this embodiment, when the door is manually opened and closed, the protrusion 351 slides along the arc-shaped hole 342. At this time, the second gear 350 rotates independently of the first gear 340. The force of manually opening and closing the door can be transmitted to the second gear 350 through the rotating assembly 330 and the ejection assembly 320. Since the protrusion 351 can slide along the arc-shaped hole 342, the force of the second gear 350 cannot be transmitted to the first gear 340, thereby disconnecting the transmission between the second gear 350 and the drive motor 310 and avoiding the resistance of the drive motor 310 from affecting the manual opening and closing of the door.

[0122] When the door automatically opens and closes, the protrusion 351 abuts against the end of the arc-shaped hole 342, and the drive motor 310 is activated, driving the ejector assembly 320 and the rotating assembly 330 to move via the first gear 340 and the second gear 350. When the drive motor 310 is activated, the first gear 340 rotates, and the protrusion 351 abuts against the end of the arc-shaped hole 342, allowing the second gear 350 to rotate synchronously with the first gear 340. The second gear 350 is driven by the ejector assembly 320, thereby causing the ejector assembly 320 to abut against or move away from the door body 200; the second gear 350 is also driven by the rotating assembly 330, causing the door body 200 to rotate relative to the housing 100 to the open position.

[0123] Reference Figure 3 The red lines indicate the positions of the rotating rod 333 and the top rod 321 when the door 200 is closed; the black lines indicate the positions of the rotating rod 333 and the top rod 321 when the door 200 is in the fully open position.

[0124] In some possible implementations, the maximum opening angle of the door 200 is α, and the relative rotation angle between the first gear 340 and the second gear 350 is β, where β is the relative rotation angle between the first gear 340 and the second gear 350 when the protrusion 351 slides from one end of the arc-shaped hole 342 to the other end. The transmission ratio of the first gear 340 and the second gear 350 relative to the hinge axis (i.e., the rotation axis of the rotating rod 333) is i, then β ≥ α / i.

[0125] In some examples, α = 120°, i = 5.5, β ≥ 120° / 5.5 = 21.8°

[0126] Therefore, by defining the relationship between β and α, the arc-shaped hole 342 on the first gear 340 is ensured to have sufficient stroke to transmit enough rotational motion to the second gear 350 without interrupting power transmission. This motion, through a transmission chain with a reduction ratio of i, ultimately drives the door 200 to rotate by an angle α. This ensures the continuity of the drive motor 310 in opening the door 200, preventing the protrusion 351 from sliding off the arc-shaped hole 342 during a single opening, thus avoiding disruption to the smoothness of the opening. Furthermore, it ensures sufficient stroke for manual opening and closing.

[0127] Therefore, in the refrigerator of this application embodiment, the door opening and closing mechanism 300 adopts a drive motor 310, which can drive the push-out component 320 to perform the push-open action of the door 200, and can also drive the rotating component 330 to perform the rotating opening action of the door 200, thereby reducing the number of parts, simplifying the mechanical structure, and making the structure of the door opening and closing mechanism 300 highly integrated.

[0128] By utilizing the sliding engagement of the arc-shaped hole 342 of the first gear 340 and the protrusion 351 of the second gear 350, the clutch can be disengaged and engaged without the need for an additional electromagnetic clutch, which reduces both cost and control complexity.

[0129] When the door is manually opened and closed, the protrusion 351 can slide within the arc-shaped hole 342, disconnecting the connection between the first gear 340 and the second gear 350. This decouples the transmission between the second gear 350 and the drive motor 310, ensuring that the user can open and close the door without motor resistance. When the door is automatically opened and closed, the protrusion 351 abuts against the end of the arc-shaped hole 342, connecting the first gear 340 and the second gear 350. The force of the drive motor 310 is transmitted through the first gear 340 to the second gear 350, and then to the ejector assembly 320 and the rotating assembly 330. Only the drive motor 310 needs to be controlled, simplifying the control logic and reducing the failure rate.

[0130] The door opening and closing mechanism 300 of this application embodiment has a simple structure, low cost, simple control logic, and high reliability, providing a cost-effective and highly reliable solution for automatic door opening and closing functions.

[0131] With the above settings, the refrigerator of this embodiment has an automatic mode and a manual mode in its door body 200; the drive motor 310 is configured to drive the first gear 340 to rotate so as to drive the protrusion 351 to slide relative to the arc-shaped hole 342; when the second gear 350 rotates independently of the first gear 340, the door body 200 is in manual mode; when the second gear 350 rotates synchronously with the first gear 340, the door body 200 is in automatic mode.

[0132] Thus, the drive motor 310 in this embodiment can not only provide driving force for the ejection assembly 320 and the rotation assembly 330, but also provide driving force for the switching between automatic and manual modes, realizing the switching between automatic and manual door opening and closing, ensuring that the ejection door body 200 and the rotation door body 200 integrate multiple functions, further simplifying the structure of the door opening and closing mechanism 300 and reducing costs; moreover, only the forward and reverse rotation of the drive motor 310 and the running time need to be controlled, further simplifying the control logic.

[0133] Continue to refer to Figure 2 In some embodiments of this application, the ejector assembly 320 includes an ejector rod 321 and a rack 322, with the rack 322 fixedly connected to the ejector rod 321. Exemplarily, the rack 322 and the ejector rod 321 are integrally formed, resulting in a stable structure.

[0134] Furthermore, the rack 322 meshes with the second gear 350, and the push rod 321 is slidably connected to the housing 100 along the depth direction of the housing 100.

[0135] The first housing 361 has a groove 3611 extending along the depth direction. The push rod 321 is slidably installed in the groove 3611, so that the push rod 321 can slide relative to the housing 100 along the depth direction. A notch is provided on one side wall of the groove 3611 extending along the depth direction, so that the rack 322 can be exposed outside the groove 3611, thereby meshing with the second gear 350.

[0136] In this embodiment, the rack 322 directly meshes with the second gear 350, so that the force of the second gear 350 is directly transmitted to the rack 322, driving the push rod 321 to move, resulting in a simple structure.

[0137] Of course, the rack 322 can also mesh with the second gear 350 through the intermediate gear to adjust the gear layout of the door opening mechanism 300, and adjust the torque and speed through the transmission ratio of the gear transmission.

[0138] In this embodiment, the ejector assembly 320 includes a rack 322 and an ejector rod 321. The rack 322 meshes with the second gear 350, converting the rotational motion of the second gear 350 into the linear motion of the ejector rod 321. The structure is simple and reliable, and the ejection force is large.

[0139] In some possible implementations of this application, the rotating assembly 330 includes a third gear 331, which is rotatably mounted on the housing 100 and meshes with the second gear 350.

[0140] For example, a second shaft 3311 is provided on the first housing 361, and a third gear 331 is rotatably mounted on the second shaft 3311.

[0141] The rotating assembly 330 may also include a fourth gear 332, which is rotatably mounted on the housing 100 and meshes with the third gear 331. The fourth gear 332 is located near the front end of the mounting box 360 relative to the third gear 331.

[0142] The rotating assembly 330 may also include a rotating rod 333, one end of which is mounted on the fourth gear 332 so that the rotating rod 333 rotates under the drive of the fourth gear 332; the other end of the rotating rod 333 is connected to the door body 200.

[0143] A hinge shaft is provided at one end of the fourth gear 332. The hinge shaft is connected to the fourth gear 332. The hinge shaft rotates under the drive of the fourth gear 332, thereby driving the rotating rod 333 to rotate, so as to realize the rotation opening and closing of the door 200.

[0144] In this embodiment, the rotating component 330 uses multi-stage gear transmission to increase the reduction ratio, ensuring that the drive motor 310 can drive the door 200 to rotate smoothly and reduce the shaking during the opening and closing of the door 200.

[0145] Continue to refer to Figure 3 The arc-shaped hole 342 has a first end 3421 and a second end 3422 that are opposite each other along its extension direction. The first end 3421 and the second end 3422 of the arc-shaped hole 342 are respectively arc-shaped, which are adapted to the shape of the protrusion 351, increasing the contact area between the protrusion 351 and the end of the arc-shaped hole 342, which helps to disperse the force and avoid the force from accumulating and easily causing fatigue damage.

[0146] When the protrusion 351 abuts against the first end 3421 of the arc-shaped hole 342, the drive motor 310 is configured to rotate about a first direction to open the door 200 via the ejector assembly 320 and the rotating assembly 330, see reference. Figure 4 .

[0147] When the protrusion 351 abuts against the second end 3422 of the arc-shaped hole 342, the drive motor 310 is configured to rotate about the second direction to close the door 200 via the ejection assembly 320 and the rotation assembly 330, see reference. Figure 6 The second direction is opposite to the first direction.

[0148] Thus, by rotating the drive motor 310 in both directions, it is possible to use one drive motor 310 to push out the door body 200 and rotate the door body 200, which simplifies the control logic. Moreover, the precise triggering of the opening and closing actions is ensured by the contact between the two different ends of the protruding post 351 and the arc-shaped hole 342.

[0149] In this embodiment, the drive motor 310 is configured to drive the first gear 340 to rotate, so that the protrusion 351 moves between the first end 3421 and the second end 3422 of the arc-shaped hole 342.

[0150] Thus, by using the drive motor 310 to adjust the position of the protrusion 351 within the arc-shaped hole 342, the programmed switching between manual and automatic modes can be achieved. Furthermore, the drive motor 310 can also be configured to, after opening or closing the door 200, drive the first gear 340 to move the protrusion 351 to the end of the arc-shaped hole 342 for resetting, ensuring that the door can be opened and closed either electrically or manually the next time.

[0151] Reference Figure 4With the door 200 closed, the protrusion 351 abuts against the first end 3421 of the arc-shaped hole 342. When the refrigerator controller receives an automatic door opening command, it controls the drive motor 310 to rotate in a first direction, driving the first gear 340 to rotate clockwise in the direction S around the first shaft 341. Because the protrusion 351 abuts against the first end 3421 of the arc-shaped hole 342, the first gear 340 drives the second gear 350 to rotate clockwise in the direction S.

[0152] On one hand, the second gear 350 meshes with the rack 322, causing the rack 322 to move forward along the depth direction, thereby causing the push rod 321 to move forward to open the door body 200.

[0153] On the other hand, the second gear 350 meshes with the third gear 331, and the rotational force is transmitted to the rotating rod 333 through the third gear 331 and the fourth gear 332. The rotating rod 333 rotates clockwise, causing the door 200 to open. See details. Figure 5 .

[0154] exist Figure 5 In the middle, the door 200 is already in the open state, and the protrusion 351 is still abutting against the first end 3421 of the arc-shaped hole 342. At this time, the door 200 cannot be closed manually. Even if the door 200 is closed electrically, the first gear 340 still needs to be rotated first to make the protrusion 351 slide relative to the arc-shaped hole 342, and the door cannot be closed immediately.

[0155] Therefore, in this embodiment, the drive motor 310 is configured to perform a reset action after the door 200 is opened and closed. This will be described in detail below with reference to the accompanying drawings.

[0156] like Figure 5 After the door 200 is opened, the protrusion 351 abuts against the first end 3421 of the arc-shaped hole 342. The drive motor 310 is configured to rotate about a second direction, driving the first gear 340 to rotate counterclockwise N about the first shaft 341. The arc-shaped hole 342 slides relative to the protrusion 351, and the second gear 350 does not rotate at this time. This continues until the second end 3422 of the arc-shaped hole 342 abuts against the protrusion 351, as... Figure 6 As shown.

[0157] Figure 6 A diagram showing the door 200 opened to the reset state. Figure 6 In the middle, the door 200 is still in the open state, but the second end 3422 of the arc-shaped hole 342 abuts against the protrusion 351. At this time, the door 200 can be closed electrically by rotating the drive motor 310 around the second direction, or the door 200 can be closed manually.

[0158] Reference Figure 7After the door 200 is electrically opened and reset, when the door 200 is manually closed, the force applied by the user to the door 200 causes the door 200 to rotate counterclockwise in the direction N. This rotation is caused by the fourth gear 332 and the third gear 331, which in turn cause the second gear 350 to rotate counterclockwise around the first shaft 341 in the direction N. This causes the protrusion 351 to slide from the second end 3422 of the arc-shaped hole 342 toward the first end 3421. By setting the opening and closing angle α, the arc angle β of the arc-shaped hole 342, and the transmission ratio of the second gear 350 to the rotating shaft of the rotating rod 333, the door 200 closes as the protrusion 351 moves from the second end 3422 of the arc-shaped hole 342 to the first end 3421.

[0159] After the door 200 is manually closed, the door opening / closing mechanism 300 is in the following state: Figure 4 In the state shown, the protruding post 351 abuts against the first end 3421 of the arc-shaped hole 342. At this time, the door can be opened manually or electrically by driving the motor 310.

[0160] The following is combined Figures 8 to 10 Describe the process of an automatic door closing.

[0161] Reference Figure 8 The door 200 is in the open state, and the protrusion 351 abuts against the second end 3422 of the arc-shaped hole 342, that is, the first gear 340 is in the reset state. Figure 8 state and Figure 6 The states shown are the same. When the refrigerator controller receives the automatic door closing command, it controls the drive motor 310 to rotate in the second direction, driving the first gear 340 to rotate counterclockwise N around the first shaft 341. Since the protrusion 351 abuts against the second end 3422 of the arc-shaped hole 342, the first gear 340 drives the second gear 350 to rotate clockwise N.

[0162] On the one hand, the second gear 350 meshes with the rack 322, causing the rack 322 to move backward along the depth direction, thereby causing the push rod 321 to move backward, so as to prevent the push rod 321 from affecting the closing of the door 200.

[0163] On the other hand, the second gear 350 meshes with the third gear 331, and the rotational force is transmitted to the rotating rod 333 through the third gear 331 and the fourth gear 332. The rotating rod 333 rotates counterclockwise, causing the door 200 to close. See details. Figure 9 .

[0164] exist Figure 9In the middle, the door 200 is already in the closed state, and the protrusion 351 is still abutting against the second end 3422 of the arc-shaped hole 342. At this time, the door 200 cannot be opened manually. Even if the door 200 is opened electrically, the first gear 340 still needs to be rotated first to make the protrusion 351 slide relative to the arc-shaped hole 342, and the door cannot be opened immediately.

[0165] Therefore, in this embodiment, the drive motor 310 is configured to perform a reset action after the door 200 is closed.

[0166] Reference Figure 9 After the door 200 is closed, the protrusion 351 abuts against the second end 3422 of the arc-shaped hole 342. The drive motor 310 is configured to rotate about a first direction, driving the first gear 340 to rotate clockwise in the direction S about the first shaft 341. The arc-shaped hole 342 slides relative to the protrusion 351. At this time, the second gear 350 does not rotate until the second end 3422 of the arc-shaped hole 342 abuts against the protrusion 351. Figure 10 As shown.

[0167] Figure 10 This is a schematic diagram showing the state after the door 200 is closed and the first gear 340 is reset. Figure 10 In the middle, the door 200 is still in the closed state, but the first end 3421 of the arc-shaped hole 342 abuts against the protrusion 351. At this time, the door 200 can be opened electrically by rotating the drive motor 310 around the first direction, or the door 200 can be closed manually. Figure 10 The status shown is the same as Figure 4 The states shown are the same.

[0168] As described above, in this embodiment, the protrusion 351 abuts against the end of the arc-shaped hole 342 to achieve synchronous rotation of the first gear 340 and the second gear 350. This allows a single drive motor 310 to simultaneously drive the ejector assembly 320 and the rotating assembly 330. Similarly, the sliding engagement between the protrusion 351 and the arc-shaped hole 342 disconnects the first gear 340 and the second gear 350, allowing the second gear 350 to rotate independently relative to the first gear 340, thus enabling manual door opening and closing. Furthermore, after the door is opened or closed, the drive motor 310 drives the first gear 340 to rotate in the opposite direction to the door's rotation, resetting the first gear 340 and preparing it for subsequent door opening and closing.

[0169] In some possible implementations of this application, the drive motor 310 is configured to control the rotation angle of the first gear 340 and the second gear 350 according to the rotation time, that is, to control the rotation time of the drive motor 310 and control the opening and closing angle of the door 200.

[0170] For example, in Figure 4In the state shown, when the door 200 is opened electrically, the door 200 is controlled to stop when it reaches the maximum opening angle by controlling the time when the drive motor 310 rotates in the first direction.

[0171] In some possible implementations, the drive motor 310 is configured to be de-energized based on a trigger signal from the door switch to determine that the door 200 is closed.

[0172] exist Figure 8 In the state shown, when the door 200 is closed electrically, the drive motor 310 is configured to be off when the door 200 is closed and the door switch is triggered.

[0173] Combination Figure 3 In some possible implementations of this application, a detector 380 is provided on the housing 100; exemplarily, a detector 380 is provided on the mounting box 360. A trigger is provided on the first gear 340.

[0174] For example, detector 380 may be a photoelectric sensor, trigger may be a light-transmitting hole disposed on first gear 340, and the color of first gear 340 may be set to dark.

[0175] For example, detector 380 may be a Hall sensor, and trigger may be a magnet disposed on first gear 340.

[0176] For example, the detector 380 may also be a micro switch, and the trigger is a mechanical triggering structure disposed on the first gear 340.

[0177] The detector 380 is configured to be triggered by a trigger when the protrusion 351 moves to the first end 3421 and the second end 3422 of the arc-shaped hole 342, so as to send a detection signal to control the drive motor 310 to shut down.

[0178] When the first gear 340 resets after the electric door opening is completed, that is, from Figure 5 Status to Figure 6 In the current state, the drive motor 310 is configured to rotate around the first shaft 341 in the second direction, driving the first gear 340 to rotate counterclockwise N around the first shaft 341. The arc-shaped hole 342 slides relative to the protrusion 351, and the second gear 350 does not rotate at this time. By setting the positions of the detector 380 and the trigger, when the second end 3422 of the arc-shaped hole 342 abuts against the protrusion 351, the trigger triggers the detector 380, sending a detection signal to control the drive motor 310 to shut down, thereby controlling the drive motor 310 to shut down.

[0179] When the first gear 340 resets after the electric door closes, that is, from Figure 9 Status to Figure 10In the current state, the drive motor 310 is configured to rotate around the first shaft 341 in a first direction, driving the first gear 340 to rotate clockwise in the direction S around the first shaft 341. The arc-shaped hole 342 slides relative to the protrusion 351, and the second gear 350 does not rotate at this time. By setting the positions of the detector 380 and the trigger, when the first end 3421 of the arc-shaped hole 342 abuts against the protrusion 351, the trigger triggers the detector 380, sending a detection signal to control the drive motor 310 to shut down, thereby controlling the drive motor 310 to shut down.

[0180] In this embodiment, by setting the detector 380 and the trigger to control the closing timing of the drive motor 310 when adjusting the relative position of the protrusion 351 and the arc-shaped hole 342, the drive motor 310 is ensured to stop immediately when the protrusion 351 abuts the end of the arc-shaped hole 342, avoiding overshoot and improving system reliability.

[0181] In some possible implementations of this application, combined with Figure 2 The second gear 350 is provided with a first tooth 352 and a second tooth 353. The first tooth 352 meshes with the rotating component 330, and the second tooth 353 meshes with the ejector component 320.

[0182] The module of the second tooth 353 is greater than the module of the first tooth 352.

[0183] Thus, the first tooth 352, which meshes with the rotating component 330, has a smaller module, which can meet the light load requirements of the rotational motion. The second tooth 353, which meshes with the ejector component 320, has a larger module, which can withstand the high load of the ejection motion. Through the module differentiation design, the strength and cost of the gear set are optimized.

[0184] The ejection action requires overcoming the suction of the door seal and the air pressure difference, necessitating greater torque; while the rotational action requires smooth rotation, demanding lower torque and higher speed. Therefore, by differentiating the module design, torque distribution is optimized to match the mechanical requirements of different actions. The differentiated tooth module design eliminates the need for additional speed reduction or force amplification mechanisms, further simplifying the transmission chain.

[0185] In some embodiments of this application, the first gear 340 and the drive motor 310 are connected by gear transmission, and the first gear 340, the ejector assembly 320, and the transmission gear between the first gear 340 and the drive motor 310 are plastic parts. For example, the plastic gear can be made of polyoxymethylene (POM, commonly known as acetal steel or special steel).

[0186] The second gear 350 and the gears of the rotating assembly 330 are metal gears.

[0187] In this embodiment, the first gear 340, the push rod 321, and the rack 322 are all plastic parts, and the transmission gear between the first gear 340 and the drive motor 310 is a plastic gear. The second gear 350, the third gear 331, and the fourth gear 332 are all metal gears.

[0188] The module of the first gear 340 and the transmission gear between the first gear 340 and the drive motor 310 is greater than the module of the second gear 350 and the gear of the rotating assembly 330.

[0189] In this embodiment, the first gear 340 and the transmission gear between the first gear 340 and the drive motor 310 are made of plastic gears for low-load transmission, reducing weight and cost; the second gear 350 and the gears of the rotating assembly 330 are made of metal gears for high-load rotation drive, ensuring durability and strength, and balancing cost and performance.

[0190] Continue to refer to Figure 2 In some embodiments of this application, the door opening and closing mechanism 300 further includes a transmission gear set 370, which includes at least one transmission gear; the drive motor 310 is connected to the first gear 340 through the transmission gear set 370.

[0191] In this way, the motor output speed and torque can be flexibly adjusted by increasing or decreasing the number of transmission gears or their teeth, adapting to different door body models 200. The transmission gear set 370 can change the direction of power transmission, facilitating the optimization of the motor's position within the housing 100.

[0192] In some implementations, the transmission gear set 370 includes a fifth gear 371, a sixth gear 372, a seventh gear 373, an eighth gear 374, and a ninth gear 375.

[0193] The fifth gear 371 is connected to the output shaft of the drive motor 310.

[0194] The sixth gear 372 and the seventh gear 373 are arranged coaxially and mounted on the third shaft 376, which is located on the first housing 361. The sixth gear 372 meshes with the fifth gear 371.

[0195] The eighth gear 374 and the ninth gear 375 are arranged coaxially and mounted on the fourth shaft 377, which is located on the first housing 361. The eighth gear 374 meshes with the seventh gear 373, and the ninth gear 375 meshes with the first gear 340.

[0196] When the drive motor 310 rotates, it drives the fifth gear 371 to rotate, which in turn drives the coaxially arranged sixth gear 372 and seventh gear 373 to rotate. Since the seventh gear 373 meshes with the eighth gear 374, it drives the eighth gear 374 to mesh. Then, the ninth gear 375, which is coaxially arranged with the eighth gear 374, drives the first gear 340 to rotate.

[0197] Of course, the above is not a limitation on the number of transmission gear sets 370. The number and arrangement of transmission gear sets 370 can be set according to actual needs.

[0198] In this embodiment, the second gear 350 is an incomplete gear, which can avoid the installation of the detector 380 in one direction and avoid the ninth gear 375 in another direction, thus avoiding interference.

[0199] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

[0200] For ease of explanation, the above description has been provided in conjunction with specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or to limit the embodiments to the specific forms disclosed above. Various modifications and variations can be obtained based on the above teachings. The selection and description of the above embodiments are for the purpose of better explaining the principles and practical applications, thereby enabling those skilled in the art to better utilize the described embodiments and various different variations of embodiments suitable for specific use considerations.

Claims

1. A refrigerator, characterized in that, include: The box (100) is constructed to form a storage room; The door (200) is connected to the box (100) via a door opening and closing mechanism (300) to open or close the storage compartment; The door opening and closing mechanism (300) includes: Drive motor (310); The ejection assembly (320) is configured to push open the door (200) under the drive of the drive motor (310) so as to separate the door (200) from the housing (100); A rotating assembly (330) is connected to the door body (200) and is configured to rotate the door body (200) relative to the housing (100) under the drive of the drive motor (310). The first gear (340) is rotatably mounted on the housing (100), and the first gear (340) is provided with an arc-shaped hole (342) extending around the rotation center of the first gear (340); the first gear (340) is connected to the output end of the drive motor (310). The second gear (350) is coaxially arranged with the first gear (340) and rotatably mounted on the housing (100); the second gear (350) is provided with a protrusion (351), which slides in conjunction with the arc-shaped hole (342); the second gear (350) is connected to the ejector assembly (320) and the rotating assembly (330) respectively. When the door is manually opened or closed, the protruding post (351) slides along the arc-shaped hole (342); When the door is automatically opened and closed, the protruding post (351) abuts against the end of the arc-shaped hole (342), the drive motor (310) is configured to start, and the drive motor (310) drives the ejection assembly (320) and the rotating assembly (330) to move through the first gear (340) and the second gear (350).

2. The refrigerator according to claim 1, characterized in that, The arc-shaped hole (342) has a first end (3421) and a second end (3422) opposite each other along its extension direction; when the protrusion (351) abuts against the first end (3421) of the arc-shaped hole (342), the drive motor (310) is configured to rotate about a first direction to open the door (200) through the ejector assembly (320) and the rotating assembly (330). When the protrusion (351) abuts against the second end (3422) of the arc-shaped hole (342), the drive motor (310) is configured to rotate about a second direction to close the door (200) via the ejector assembly (320) and the rotating assembly (330). The second direction is opposite to the first direction.

3. The refrigerator according to claim 1, characterized in that, The drive motor (310) is configured to drive the first gear (340) to rotate so that the protrusion (351) moves between the first end (3421) and the second end (3422) of the arc-shaped hole (342).

4. The refrigerator according to claim 3, characterized in that, A detector (380) is provided on the housing (100), and a trigger is provided on the first gear (340); The detector (380) is configured to be triggered by the trigger when the protrusion (351) moves to the first end (3421) and the second end (3422) of the arc-shaped hole (342) to issue a detection signal to control the drive motor (310) to shut down.

5. The refrigerator according to any one of claims 1-4, characterized in that, The second gear (350) is provided with a first tooth (352) and a second tooth (353), the first tooth (352) meshing with the rotating assembly (330), and the second tooth (353) meshing with the ejector assembly (320); The module of the second tooth (353) is greater than the module of the first tooth (352).

6. The refrigerator according to any one of claims 1-4, characterized in that, The first gear (340) and the drive motor (310) are connected by gear transmission, and the first gear (340) and the ejection assembly (320) are plastic parts, and the transmission gear between the first gear (340) and the drive motor (310) is a plastic gear. The second gear (350) and the gears of the rotating assembly (330) are metal gears.

7. The refrigerator according to any one of claims 1-4, characterized in that, The ejector assembly (320) includes an ejector rod (321) and a rack (322). The rack (322) is fixedly connected to the ejector rod (321), and the rack (322) meshes with the second gear (350). The ejector rod (321) is slidably connected to the housing (100) along the depth direction of the housing (100).

8. The refrigerator according to any one of claims 1-4, characterized in that, The rotating assembly (330) includes: The third gear (331) is rotatably mounted on the housing (100) and meshes with the second gear (350); The fourth gear (332) is rotatably mounted on the housing (100) and meshes with the third gear (331); A rotating rod (333) is mounted on the fourth gear (332) at one end, so that the rotating rod (333) rotates under the drive of the fourth gear (332); the other end of the rotating rod (333) is connected to the door body (200).

9. The refrigerator according to any one of claims 1-4, characterized in that, The door opening and closing mechanism (300) further includes a transmission gear set (370), which includes at least one transmission gear; the drive motor (310) is connected to the first gear (340) via the transmission gear set (370).

10. A refrigerator, characterized in that, include: The box (100) is constructed to form a storage room; The door (200) is connected to the box (100) via a door opening and closing mechanism (300) to open or close the storage compartment; The door opening and closing mechanism (300) includes: Drive motor (310); The ejection assembly (320) is configured to push open the door (200) under the drive of the drive motor (310) so as to separate the door (200) from the housing (100); The rotating assembly (330) is configured to rotate the door (200) relative to the housing (100) under the drive of the drive motor (310). The first gear (340) is rotatably mounted on the housing (100), and the first gear (340) is provided with an arc-shaped hole (342) extending around the rotation center of the first gear (340); the first gear (340) is connected to the output end of the drive motor (310). The second gear (350) is coaxially arranged with the first gear (340) and rotatably mounted on the housing (100); the second gear (350) is provided with a protrusion (351), which slides in conjunction with the arc-shaped hole (342); the second gear (350) is connected to the ejector assembly (320) and the rotating assembly (330) respectively. The door (200) has an automatic mode and a manual mode; the drive motor (310) is configured to drive the first gear (340) to rotate, thereby causing the protrusion (351) to slide relative to the arc-shaped hole (342); when the second gear (350) rotates independently of the first gear (340), the door (200) is in the manual mode; when the second gear (350) rotates synchronously with the first gear (340), the door (200) is in the automatic mode.

Images