Refrigerator and control method thereof

Abstract

The invention provides a refrigerator and a control method thereof. The refrigerator comprises a refrigerator body; the door body is connected to the box body in a sliding manner; an automatic switch unit includes: a housing; a driving mechanism configured to provide a driving force; the executing mechanism is configured to move close to the box body or move away from the box body under the action of driving force; the transmission gear train is configured to be connected with the driving mechanism and the executing mechanism; the induction mechanism is electrically connected with the automatic switch unit, and the induction mechanism comprises a position induction assembly which is configured to determine the position state of the execution mechanism; the pressure sensing assembly is arranged on the door body, the pressure sensing assembly comprises a pressure sensor, and the pressure sensor is configured to be in contact with the executing mechanism under pushing of the executing mechanism so as to release a contact signal or be separated from the executing mechanism so as to release a separation signal. The push rod can be reset, and meanwhile a user can manually open the door body for a long time.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of household appliances, in particular to a refrigerator and a control method thereof. BACKGROUND

[0002] With the improvement of living standards, people have higher demand for the automation of refrigerator doors. Refrigerators are provided with automatic opening and closing units to improve the intelligence of the refrigerator and improve the user experience.

[0003] In the process of conceiving and implementing the present application, the applicant found that at least the following problems exist: Some refrigerators or wine cabinets use hinges with self-closing function. When the door is opened by less than a certain angle, the door body will be automatically closed under the action of the hinge.

[0004] The foregoing narrative is intended to provide general background information and does not necessarily constitute the prior art.

[0005] SUMMARY

[0006] The main purpose of the present application is to provide a refrigerator and a control method thereof, which can reset the push rod and manually open the door body for a long time.

[0007] To achieve the above-mentioned purpose, in a first aspect, the present application provides a refrigerator, comprising:

[0008] a cabinet;

[0009] a door body slidingly connected to the cabinet;

[0010] an automatic opening and closing unit, comprising:

[0011] a housing;

[0012] a driving mechanism configured to provide a driving force;

[0013] an actuator configured to move close to the cabinet or move away from the cabinet under the action of the driving force;

[0014] a transmission gear train configured to connect the driving mechanism and the actuator;

[0015] a sensing mechanism electrically connected to the automatic opening and closing unit, the sensing mechanism comprising:

[0016] a position sensing component configured to determine the position state of the actuator;

[0017] a pressure sensing component provided on the door body, the pressure sensing component comprising a pressure sensor configured to contact the actuator under the pushing of the actuator to release a contact signal, or to separate from the actuator to release a separation signal;

[0018] When the actuator is in the half-expanded state and the pressure sensor releases the disengagement signal, the actuator moves to the fully expanded state under the action of the driving force, so that the actuator is reset to the retracted state.

[0019] The beneficial effects of the present application are: through the setting of the actuator, the automatic opening of the door body can be met, through the setting of the pressure sensing assembly and the position sensing assembly, the push rod in the actuator can be reset, so that the door body can be closed, and at the same time, the problem that the door body is automatically closed under the action of the hinge when the door body is opened by less than a certain angle can be avoided, thereby ensuring that the refrigerator can operate normally, and the functional reliability of the refrigerator is improved.

[0020] On the basis of the above technical solutions, the present application can also be improved as follows.

[0021] In some optional embodiments, the pressure sensor has a switch portion, and the switch portion faces the actuator;

[0022] The switch portion is configured to contact the actuator under the pushing of the actuator and move away from the side of the actuator to release the contact signal.

[0023] It should be noted that when the push rod is extended, the door body is pushed open, and then the switch portion is pushed, at this time, the switch portion is in a state of being pressed, and then moves away from the side of the push rod in the direction of the opening of the door body, when it is pressed, it represents that it is in contact with the push rod, and then the contact signal can be released.

[0024] In some optional embodiments, the pressure sensing assembly further comprises a mounting frame and a movable piece, the mounting frame has a mounting cavity, and the pressure sensor is mounted in the mounting cavity;

[0025] The mounting frame has an opening, and the movable piece is movably arranged in the opening, the switch portion abuts against the inner side surface of the movable piece, and the movable piece is configured to move away from the side of the actuator under the pushing of the actuator to abut against the mounting frame.

[0026] In some optional embodiments, the pressure sensing assembly further comprises a guide piece and a fourth elastic piece, and the guide piece is arranged between the movable piece and the mounting cavity;

[0027] The guide piece is a columnar piece, and the fourth elastic piece is a compression spring, the fourth elastic piece is sleeved on the outer periphery of the guide piece, and is located between the inner side surface of the movable piece and the bottom wall surface of the mounting cavity.

[0028] It should be noted that the guide piece and the fourth elastic piece are provided to satisfy that the movable piece moves in the direction of the mounting frame under the pushing of the push rod, or resets under the action of the fourth elastic piece when it is separated from the push rod.

[0029] In some optional embodiments, the transmission gear train comprises a second transmission gear and at least one first transmission gear, the second transmission gear is coaxially arranged with the first transmission gear, one of the first transmission gear and the second transmission gear is in driving connection with the driving mechanism, and the other is in driving connection with the executing mechanism.

[0030] The position sensing assembly comprises a first sensing member and at least two position sensors, one of the first sensing member and the position sensors is arranged on the second transmission gear, and the other is arranged on the housing, the first sensing member is configured to determine the position state of the executing mechanism according to the change of the corresponding positions between the at least two position sensors.

[0031] In some optional embodiments, the second transmission gear is in driving connection with the executing mechanism.

[0032] The at least two position sensors comprise a first position sensor and a second position sensor, the first position sensor and the second position sensor are arranged on the second transmission gear in a spaced manner along the rotation direction of the second transmission gear.

[0033] In some optional embodiments, when the first sensing member faces the first position sensor, the executing mechanism is in a retracted state or a fully expanded state; when the first sensing member faces the second position sensor, the executing mechanism is in a semi-expanded state.

[0034] The first sensing member is a magnetic member, and at least one of the first position sensor and the second position sensor is a Hall sensor; and / or,

[0035] The first sensing member is a light-emitting member, and at least one of the first position sensor and the second position sensor is a light sensor.

[0036] In some optional embodiments, along the rotation direction of the second transmission gear, the second position sensor is close to the first position sensor in the fully expanded state and is located on the front side of the first position sensor in the fully expanded state.

[0037] In a second aspect, the application further provides a control method of a refrigerator, the method comprising:

[0038] Obtaining position information of the executing mechanism and pressure information of the pressure sensing assembly;

[0039] Controlling the executing mechanism to reset according to the position information and the pressure information.

[0040] In some optional embodiments, the controlling the executing mechanism to reset according to the position information and the pressure information specifically comprises:

[0041] When the position information indicates that the executing mechanism is in a semi-expanded state and the pressure information indicates that the pressure sensing assembly is separated, controlling the executing mechanism to be in a fully expanded state under the action of the driving force.

[0042] Once the actuator is in the fully deployed state, control the actuator to reset to the retracted state.

[0043] The refrigerator and its control method provided in this application include: a cabinet; a door slidably connected to the cabinet; an automatic switching unit, which includes: a housing; a drive mechanism configured to provide a driving force; an actuator configured to move closer to the cabinet or move away from the cabinet under the action of the driving force; a transmission gear system configured to connect the drive mechanism and the actuator; and a sensing mechanism electrically connected to the automatic switching unit, the sensing mechanism including: a position sensing component configured to determine the position state of the actuator; and a pressure sensing component disposed on the door, the pressure sensing component including a pressure sensor configured to contact the actuator under the push of the actuator to release a contact signal, or to disengage from the actuator to release a disengagement signal; when the actuator is in a semi-open state and the pressure sensor releases the disengagement signal, the actuator moves to a fully open state under the action of the driving force to reset the actuator to a retracted state.

[0044] By configuring the actuator, the door can be opened automatically. By configuring the pressure sensing component and the position sensing component, the push rod in the actuator can be reset so that the door can be closed. At the same time, it can also allow users to manually open the door for a longer period of time, avoiding the problem that the door will automatically close under the action of the hinge when it is opened less than a certain angle. This ensures that the refrigerator can operate normally and improves the functional reliability of the refrigerator. Attached Figure Description

[0045] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0046] Figure 1 This is a schematic diagram of the structure of a refrigerator provided in an embodiment of this application;

[0047] Figure 2 A first-view structural schematic diagram of another refrigerator in a first state provided in an embodiment of this application;

[0048] Figure 3 A second-view structural schematic diagram of another refrigerator provided in an embodiment of this application in a first state;

[0049] Figure 4 A first-view structural schematic diagram of another refrigerator in a second state provided in an embodiment of this application;

[0050] Figure 5 This is a schematic diagram of the structure of the first automatic switching unit in the refrigerator in the first state according to the embodiments of this application;

[0051] Figure 6 This is a schematic diagram of the structure of the first automatic switching unit in the refrigerator in the second state provided in the embodiments of this application;

[0052] Figure 7 This is a schematic diagram of the structure of the first automatic switching unit in the refrigerator in the third state provided in the embodiments of this application;

[0053] Figure 8 This is a schematic diagram of the structure of the pressure sensing component in the refrigerator provided in an embodiment of this application;

[0054] Figure 9 for Figure 8 A cross-sectional view of the pressure sensing component AA in its first state;

[0055] Figure 10 for Figure 8 A cross-sectional view of the pressure sensing component AA in its second state;

[0056] Figure 11 This is a schematic flowchart of a refrigerator control method provided in an embodiment of this application;

[0057] Figure 12 This is a schematic flowchart of a second refrigerator control method provided in an embodiment of this application;

[0058] Figure 13 This is a schematic diagram of the structure of the second automatic switching unit in the refrigerator in the first state according to the embodiments of this application;

[0059] Figure 14 An exploded view of the second type of automatic switching unit in a refrigerator provided in this application embodiment;

[0060] Figure 15 An exploded view of a second type of partial automatic switching unit in a refrigerator provided in an embodiment of this application;

[0061] Figure 16 This is a schematic diagram of the structure of the second type of partial automatic switching unit in a refrigerator provided in an embodiment of this application;

[0062] Figure 17 A second-view structural schematic diagram of another refrigerator in a second state provided in an embodiment of this application;

[0063] Figure 18 This is a schematic diagram of the structure of the automatic switching unit in the refrigerator in the second state according to an embodiment of this application;

[0064] Figure 19 This is a schematic diagram of the structure of the control circuit unit in the refrigerator provided in the embodiments of this application;

[0065] Figure 20 This is a schematic diagram of the structure of the control circuit unit in the refrigerator in the first state according to an embodiment of this application;

[0066] Figure 21 This is a schematic diagram of the second state of the control circuit unit in the refrigerator provided in an embodiment of this application;

[0067] Figure 22 This is a schematic diagram of the structure of the third automatic switch unit in the refrigerator provided in the embodiments of this application in the first state;

[0068] Figure 23 This is a schematic diagram of the structure of the third type of automatic switching unit in the refrigerator in the third state provided in the embodiments of this application;

[0069] Figure 24 This is a schematic diagram of the structure of the actuator in the refrigerator in the third state provided in the embodiments of this application;

[0070] Figure 25 This is a schematic diagram of the transmission gear system in a refrigerator provided in an embodiment of this application;

[0071] Figure 26 This is a schematic diagram of the structure of a refrigerator in a first state from a second perspective, provided as an embodiment of this application.

[0072] Figure 27 This application provides a schematic diagram of the structure of a refrigerator in a second state from a second perspective, representing an embodiment of the present application.

[0073] Figure 28 A first-view structural schematic diagram of the assembly of a fourth type of automatic switching unit with a door in a refrigerator provided in an embodiment of this application;

[0074] Figure 29 A second-view structural schematic diagram of the assembly of a fourth type of automatic switching unit with a door in a refrigerator provided in an embodiment of this application;

[0075] Figure 30 This is a first-view structural schematic diagram of the fourth automatic switching unit in a refrigerator provided in an embodiment of this application;

[0076] Figure 31 This is a structural schematic diagram from a second perspective of the fourth type of automatic switching unit in a refrigerator provided in an embodiment of this application;

[0077] Figure 32 This is a schematic diagram of the structure of the refrigerator door provided in an embodiment of this application;

[0078] Figure 33 forFigure 32 Cross-sectional view of AA in its first state;

[0079] Figure 34 for Figure 32 Cross-sectional view of the second state of AA;

[0080] Figure 35 for Figure 32 Cross-sectional view of the first state of BB;

[0081] Figure 36 for Figure 32 Cross-sectional view of the second state of BB;

[0082] Figure 37 This is a schematic diagram of the assembly of the refrigerator door and the anti-collision unit provided in an embodiment of this application;

[0083] Figure 38 An exploded view from a first perspective of the assembly of the refrigerator door and the anti-collision unit in an embodiment of this application;

[0084] Figure 39 An exploded view from a second perspective of the assembly of the refrigerator door and the anti-collision unit provided in an embodiment of this application;

[0085] Figure 40 An exploded view from a third-person perspective of the assembly of the refrigerator door and the anti-collision unit in an embodiment of this application;

[0086] Figure 41 A cross-sectional view of the refrigerator door and anti-collision unit assembly provided in an embodiment of this application;

[0087] Figure 42 This is a first-view structural schematic diagram of the fifth type of automatic switching unit in a refrigerator provided in an embodiment of this application;

[0088] Figure 43 This is a structural schematic diagram from a second perspective of the fifth type of automatic switching unit in a refrigerator provided in an embodiment of this application;

[0089] Figure 44 This is a third-view structural schematic diagram of the fifth automatic switching unit in a refrigerator provided in an embodiment of this application;

[0090] Figure 45 An exploded view of the fifth type of automatic switching unit in a refrigerator provided in this application embodiment;

[0091] Figure 46 An assembly diagram of a third clutch gear and a clutch drive gear in a refrigerator in a first state, provided in an embodiment of this application;

[0092] Figure 47An assembly diagram of a third clutch gear and a clutch drive gear in a refrigerator in a second state, provided in an embodiment of this application;

[0093] Figure 48 A schematic diagram of the assembly of the third clutch gear and another clutch drive gear in the refrigerator in the first state, provided in an embodiment of this application;

[0094] Figure 49 This is a schematic diagram of the clutch drive gear in a refrigerator provided in an embodiment of this application.

[0095] Explanation of reference numerals in the attached figures:

[0096] 100 - Refrigerator;

[0097] 110 - Enclosure;

[0098] 120 - Door body; 121 - First door body; 1211 - Hinge; 122 - Second door body; 1221 - Guide rail pair; 12211 - Fixed guide rail; 12212 - Sliding guide rail;

[0099] 130 - Anti-collision unit; 131 - Anti-collision component; 1311 - First anti-collision component; 1312 - Second anti-collision component; 132 - Micro switch; 133 - Sliding assembly; 1331 - Sliding component; 13311 - First sliding part; 13312 - Second sliding part; 1332 - Sliding groove; 134 - Moving component; 1341 - Communicating hole; 135 - First elastic component; 136 - Guide post;

[0100] 140 - Drive mechanism; 141 - Drive motor; 142 - First worm gear; 143 - First worm wheel;

[0101] 150 - Actuator; 151 - Actuating rack; 152 - Push rod; 153 - First transmission rack; 1531 - Transmission surface; 1532 - Moving surface; 1533 - Third transmission tooth; 15331 - Third transmission initial tooth; 15332 - Third transmission final tooth; 154 - Third elastic element;

[0102] 160 - Transmission gear system; 161 - First transmission gear; 162 - Second transmission gear; 1621 - Fourth transmission tooth; 16211 - Fourth transmission initial tooth; 16212 - Fourth transmission final tooth;

[0103] 170 - Clutch mechanism; 171 - Clutch motor; 172 - Second worm gear; 173 - Second worm wheel; 174 - First clutch gear; 175 - Second clutch gear; 176 - Third clutch gear; 1761 - Second transmission gear; 177 - Clutch rack; 178 - Sliding key; 179 - Clutch drive gear; 1791 - First transmission gear; 17911 - Deformation part; 1792 - Second elastic element; 1793 - Rotating element; 1794 - Transmission element; 1795 - Connecting element; 1796 - Notch;

[0104] 180 - Housing; 181 - First housing; 182 - Second housing; 1821 - Connecting groove;

[0105] 190 - Sensing mechanism; 1901 - Position sensing component; 191 - First sensing element; 192 - First position sensor; 193 - Connecting plate; 194 - Second position sensor;

[0106] 1902 - Pressure sensing assembly; 1912 - Pressure sensor; 19121 - Switch; 1913 - Moving part; 1914 - Fourth elastic element; 1915 - Mounting bracket; 1916 - Guide element;

[0107] 200 - Control circuit unit; 210 - Main power supply; 220 - Auxiliary power supply; 230 - Conducting module; 231 - First conducting element; 232 - Second conducting element; 233 - First diode; 234 - Second diode; 235 - Third diode; 240 - First resistor; 250 - Second resistor; 260 - Third resistor; 270 - Fourth resistor; 280 - Microcontroller module. Detailed Implementation

[0108] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, 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, 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. All other obtained embodiments are within the scope of protection of this application. In the absence of conflict, the following embodiments and features can be combined with each other.

[0109] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0110] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0111] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0112] Currently, in the process of conceiving and implementing this application, the applicant has discovered at least the following problems: refrigerators or wine cabinets use hinges with self-closing function, and when the door is opened to less than a certain angle, the door will automatically close under the action of the hinge.

[0113] When a refrigerator does not have a push lever, the door may close due to the hinges when the opening angle is small, requiring the user to open the door again. When a refrigerator has a push lever, the lever pushes the door away from the refrigerator to open it. If the lever retracts automatically after reaching its maximum travel, the door may close automatically due to the hinges if the user is slow to operate, affecting the user experience.

[0114] To overcome the deficiencies in the prior art, the refrigerator provided in this application, through the setting of the actuator, can automatically open the door. Through the setting of the pressure sensing component and the position sensing component, the push rod in the actuator can be reset so that the door can be closed. At the same time, it can also meet the user's need to manually open the door for a longer period of time, avoiding the problem that the door will automatically close under the action of the hinge when the door is opened less than a certain angle, thereby ensuring the normal operation of the refrigerator and improving the functional reliability of the refrigerator.

[0115] The contents of this application will now be described in detail with reference to the accompanying drawings, so that those skilled in the art can have a clearer and more detailed understanding of the contents of this application.

[0116] Figure 1 This is a schematic diagram of the structure of a refrigerator provided in an embodiment of this application. Figure 2 This is a first-view structural schematic diagram of another refrigerator in a first state, provided as an embodiment of this application. Figure 3 This is a second-view structural schematic diagram of another refrigerator provided in an embodiment of this application, in a first state. Figure 4 This is a first-view structural diagram of another refrigerator in a second state, provided as an embodiment of this application. Figure 5 This is a schematic diagram of the structure of the first automatic switching unit in the refrigerator in the first state according to the embodiments of this application. Figure 6 This is a schematic diagram of the structure of the first automatic switching unit in the refrigerator in the second state according to the embodiments of this application. Figure 7 This is a schematic diagram of the structure of the first automatic switching unit in the refrigerator in the third state according to the embodiments of this application. Figure 8 This is a schematic diagram of the structure of the pressure sensing component in the refrigerator provided in an embodiment of this application. Figure 9 for Figure 8 A cross-sectional view of the pressure sensing component AA in its first state. Figure 10 for Figure 8 A cross-sectional view of the pressure sensing component AA in its second state. Figure 11 This is a schematic flowchart of a refrigerator control method provided in an embodiment of this application. Figure 12 This is a schematic flowchart of a second refrigerator control method provided in an embodiment of this application.

[0117] like Figures 1 to 12 As shown, this application embodiment provides a refrigerator 100, including:

[0118] Box 110;

[0119] Door 120 is slidably connected to housing 110;

[0120] Automatic switching unit, comprising:

[0121] 180 for the casing;

[0122] Drive mechanism 140, which is configured to provide driving force;

[0123] Actuator 150 is configured to move toward housing 110 or move away from housing 110 under the action of driving force;

[0124] A transmission gear train 160 is configured to connect a drive mechanism 140 and an actuator 150.

[0125] The sensing mechanism 190 is electrically connected to the automatic switch unit. The sensing mechanism 190 includes a position sensing component 1901, which is configured to determine the position state of the actuator 150.

[0126] Pressure sensing component 1902 is disposed on door body 120. Pressure sensing component 1902 includes pressure sensor 1912, which is configured to contact actuator 150 to release a contact signal when pushed by actuator 150, or to disengage from actuator 150 to release a disengagement signal.

[0127] When the actuator 150 is in a semi-deployed state and the pressure sensor 1912 releases a disengagement signal, the actuator 150 moves to a fully deployed state under the action of the driving force, so that the actuator 150 resets to the retracted state.

[0128] By setting the actuator 150, the door 120 can be opened automatically. By setting the pressure sensing component 1902 and the position sensing component 1901, the push rod 152 in the actuator 150 can be reset so that the door 120 can be closed. At the same time, it can also meet the user's need to manually open the door 120 for a longer period of time, avoiding the problem that the door 120 will automatically close under the action of the hinge 1211 when the door is opened less than a certain angle. This ensures that the refrigerator 100 can operate normally and improves the functional reliability of the refrigerator 100.

[0129] It should be noted that the following provides a detailed explanation of each structure.

[0130] [Box 110]

[0131] refer to Figure 1 The refrigerator 100 in this embodiment may include a cabinet 110 and a door 120. The cabinet 110 may be configured with a refrigeration compartment. The refrigeration compartment has an opening for storing food and other items. There may be one or more refrigeration compartments. When there are multiple refrigeration compartments, they may be divided into a refrigerator compartment, a freezer compartment, or a variable temperature compartment, etc.

[0132] For example, the refrigerator body 110 may include an outer shell and an inner liner, the outer shell defining the external boundary of the refrigerator 100. The inner liner may be disposed within and connected to the outer shell. The inner liner may be recessed inward to form a cooling compartment. An insulation layer may be filled between the outer shell and the inner liner, which can insulate the cooling compartment, thereby reducing the energy consumption of the refrigerator 100.

[0133] [Gate 120]

[0134] It should be noted that the door 120 can be connected to the cabinet 110 and is used to open or close the refrigeration compartment. One door 120 can be installed for each refrigeration compartment. Alternatively, two doors 120 can be installed for the same refrigeration compartment.

[0135] In some possible implementations of this application, the door 120 can be a first door 121, which can be rotatably connected to the housing 110 about the height of the housing 110. The first door 121 can be pulled or pushed to rotate relative to the housing 110, thereby opening or closing the refrigeration compartment.

[0136] It should be noted that the height direction of the cabinet 110 refers to the height direction of the cabinet 110 when the refrigerator 100 is in normal use, for example... Figure 1 The vertical direction Z is shown in the diagram. Exemplarily, the first door 121 can be rotatably connected to the housing 110 via a hinge 1211.

[0137] In other possible implementations of the embodiments of this application, such as Figure 1 As shown, the door 120 can be a second door 122, and the second door 122 can be slidably connected to the box 110 along the depth direction of the box 110.

[0138] This application uses the first gate 121 as an example for illustration.

[0139] [Automatic Switching Unit]

[0140] The refrigerator 100 of this application embodiment may also include an automatic opening and closing unit, which can be used to automatically open or close the door 120, thereby improving the convenience of opening and closing the door 120 and enhancing the user experience.

[0141] In some possible implementations of this application, the number of automatic switching units can be the same as the number of door bodies 120. That is, each door body 120 can be equipped with one automatic switching unit. Each automatic switching unit can automatically open or close its corresponding door body 120.

[0142] Continue to refer to Figures 4 to 7The automatic switching unit may include a drive mechanism 140 and an actuator 150. The drive mechanism 140 is used to provide driving force. The actuator 150 may be connected to the drive mechanism 140 and the door 120, and is configured to open or close the door 120 under the action of the driving force.

[0143] [Drive mechanism 140]

[0144] The drive mechanism 140 is used to provide the automatic switch unit with the driving force to open or close the door 120.

[0145] For example, refer to Figures 5 to 7 The drive mechanism 140 may include a drive motor 141, which has a rotatable output shaft that can be connected to the actuator 150 to provide driving force to the actuator 150. It is understood that the drive motor 141 can be replaced with other components capable of providing driving force, such as a pneumatic motor or a hydraulic motor, which will not be elaborated further in this embodiment.

[0146] The drive mechanism 140 may further include a first worm 142 and a first worm wheel 143. The first end of the first worm 142 may be connected to the first output shaft of the drive motor 141. The first worm wheel 143 may mesh with the first worm 142 and is connected to the actuator 150 via a transmission connection. When the drive mechanism 140 operates, the output shaft of the drive motor 141 rotates, driving the first worm 142 to rotate. The first worm 142 drives the meshing first worm wheel 143 to rotate, and the first worm wheel 143 drives the actuator 150 to operate, thereby opening or closing the door 120. By configuring the first worm 142 and the first worm wheel 143, the rotational speed of the driving force provided by the drive motor 141 can be reduced, the torque of the driving force can be increased, and the direction of the driving force can be changed to meet the driving force requirements of the actuator 150.

[0147] [Executive Agency 150]

[0148] The actuator 150 is used to open the door 120 under the driving force provided by the drive mechanism 140. In some possible implementations of this application embodiment, the actuator 150 may include a push rod 152, such as... Figure 8 and Figure 9 As shown, the push rod 152 can slide relative to the housing 110 along the depth direction X and is connected to the drive mechanism 140. The drive mechanism 140 can drive the push rod 152 to slide along the depth direction X to apply a pushing force to the door 120, thereby opening the door 120 and realizing the function of automatically opening the door 120.

[0149] The following description uses door 120 as the first door 121 as an example to illustrate the actuator 150. The technical solution when door 120 is the second door 122 can be referred to the following description, which will not be repeated in this embodiment.

[0150] like Figures 1 to 7 As shown, the housing 180 may be provided with a first sliding through hole facing the first door body 121, and the push rod 152 may be inserted into the first sliding through hole and slidably connected to the housing 180 along the depth direction x.

[0151] When the drive mechanism 140 applies a driving force to the push rod 152, the push rod 152 can slide relative to the housing 180 and extend through the first sliding through hole to apply a pushing force to the first door 121, thereby realizing the function of automatically opening the first door 121.

[0152] Exemplarily, the actuator 150 may further include a first transmission rack 153, which may be arranged along the depth direction x and connected to the push rod 152. The first transmission rack 153 may mesh with the transmission gear system 160. The drive mechanism 140 may drive the first transmission rack 153 to move via the transmission gear system 160, thereby causing the push rod 152 to extend out of the housing 180. The transmission gear system 160 and the first transmission rack 153 have high transmission efficiency and transmission accuracy, which can reduce the drive power requirements of the drive mechanism 140, thereby reducing the component cost of the automatic switching unit; and can enhance the stability during transmission, thereby improving the smoothness of the push rod 152 sliding relative to the housing 180.

[0153] The actuator 150 may further include a third elastic element 154, which connects the push rod 152 and the housing 180 to apply a first force to the push rod 152 opposite to the depth direction x. This first force ensures that the first transmission rack 153 and the transmission gear system 160 are always in contact on one side, reducing or preventing the backlash error of the transmission gear system 160 from affecting the transmission between the first transmission rack 153 and the transmission gear system 160. This improves the transmission accuracy between the transmission rack and the transmission gear system 160, thereby improving the positional accuracy of the push rod 152.

[0154] In general, the push rod and the last stage gear of the transmission mechanism usually use a combination of standard circular gears and racks. The push rod provides a constant thrust throughout the entire movement process. However, due to negative pressure and the door's suction force, the door requires a greater opening force at the moment of opening.

[0155] To address the aforementioned issues, the following explanation will use the second type of implementing agency as an example:

[0156] Figure 22This is a schematic diagram of the structure of the third automatic switch unit in the refrigerator provided in the embodiments of this application in the first state. Figure 23 This is a schematic diagram of the third type of automatic switching unit in a refrigerator in a third state, as provided in an embodiment of this application. Figure 24 This is a schematic diagram of the actuator in the refrigerator in the third state according to an embodiment of this application. Figure 25 This is a schematic diagram of the transmission gear system in a refrigerator provided in an embodiment of this application.

[0157] like Figures 1 to 3 as well as Figures 22 to 25 As shown, the actuator 150 includes a first transmission rack 153, which is configured to move closer to the housing 110 or move away from the housing 110 under the action of a driving force. The first transmission rack 153 has a plurality of third transmission teeth 1533, and the connection direction between the plurality of third transmission teeth 1533 has an angle with the moving direction of the first transmission rack 153.

[0158] It should be noted that the actuator 150 has three position states: retracted state, semi-extended state, and fully extended state. Consequently, the position of the push rod 152 is different depending on the three different states.

[0159] The first state of the actuator 150 is the retracted state, the second state of the actuator 150 is the fully deployed state, and the third state of the actuator 150 is the partially deployed state.

[0160] Specifically, when push rod 152 is in the retracted state, it is retracted into housing 180. At this time, neither actuator 150 nor push rod 152 is activated, and door 120 is closed. Then, actuator 150 or push rod 152 activates. Under the driving force provided by drive motor 141, push rod 152 moves away from housing 110, and door 120 gradually opens. At this time, push rod 152 is in a semi-open state. Until push rod 152 is fully open, it has moved away from housing 110 to its furthest distance under the driving force. Then, under the action of third elastic element 154, push rod 152 retracts back into housing 180. This eliminates the need for drive motor 141 to reset push rod 152, making control more flexible, intelligent, and user-friendly, and significantly reducing noise generated during operation. Afterwards, the user can manually open the first door 121 to a greater angle. In some related technologies, the closed door 120 is subjected to a variety of closing forces, such as the attraction of the magnetic door seal, the elasticity of the door closer, the clamping force of the flip beam, and the negative pressure generated by the low temperature inside the housing 110. This makes it necessary to overcome a lot of resistance in the initial stage of opening the door 120, which increases the difficulty of opening the door 120.

[0161] Therefore, the actuator 150 provided in this application can achieve a greater thrust when the push rod 152 is started under the action of driving force through the structural design of the first transmission rack 153, so as to overcome the resistance in the initial stage of opening the door 120.

[0162] Specifically, the first transmission rack 153 is inclined, and the connection between the multiple third transmission teeth 1533 is on the inclined surface, specifically inclined relative to the moving direction of the first transmission rack 153, so as to match the structure of the second transmission gear 162.

[0163] In some alternative embodiments, the first transmission rack 153 has a transmission surface 1531, which is located on the side of the first transmission rack 153 facing the second transmission gear 162.

[0164] Multiple third transmission teeth 1533 are spaced apart in the extension direction of the transmission surface 1531, wherein the connection direction of the multiple third transmission teeth 1533 is consistent with the extension direction of the transmission surface 1531.

[0165] For example, the first transmission rack 153 also has a movable surface 1532, wherein the movable surface 1532 and the transmission surface 1531 are located on opposite sides of the first transmission rack 153 along the width direction of the first transmission rack 153, the movable surface 1532 is located on the side away from the second transmission gear 162, and the transmission surface 1531 is located on the side facing the second transmission gear 162.

[0166] It should be noted that the extension direction of the moving surface 1532 is consistent with the movement direction of the first transmission rack 153, while the extension direction of the transmission surface 1531 has an angle with the movement direction of the first transmission rack 153, so that when the multiple third transmission teeth 1533 provided on the transmission surface 1531 mesh with the second transmission gear 162, they can provide a greater thrust to the push rod 152 at the moment of start-up, so as to overcome the resistance in the initial stage of opening the door body 120.

[0167] In some optional embodiments, the plurality of third transmission teeth 1533 include a third transmission initial tooth 15331 and a third transmission final tooth 15332, the third transmission initial tooth 15331 and the third transmission final tooth 15332 being located at opposite ends of the movement direction of the first transmission rack 153, wherein the third transmission final tooth 15332 is located at the end of the first transmission rack 153 away from the second transmission gear 162 when the first transmission rack 153 is in the first state.

[0168] It should be noted that the first state of the first transmission rack 153 is the retracted state of the first transmission rack 153, that is, the first transmission rack 153 and the push rod 152 are retracted into the housing 180. At this time, the first transmission rack 153 and the push rod 152 have not started to work, and the door 120 is in the closed state.

[0169] When the first transmission rack 153 is in the first state, that is, the first transmission rack 153 is in the retracted state. At this time, the first transmission rack 153 is not yet engaged with the second transmission gear 162, the third transmission last tooth 15332 is away from the second transmission gear 162, and correspondingly, the third transmission first tooth 15331 faces the second transmission gear 162.

[0170] When the first transmission rack 153 begins to extend out of the housing 180, the third transmission initial tooth 15331 first meshes with the second transmission gear 162. As the extension length of the push rod 152 increases, the third transmission initial tooth 15331 gradually moves away from the second transmission gear 162. Subsequently, the other third transmission teeth 1533 between the third transmission initial tooth 15331 and the third transmission final tooth 15332 mesh with the second transmission gear 162. At this time, the first transmission rack 153 is in the third state, that is, the first transmission rack 153 is in the semi-extended state.

[0171] When the push rod 152 continues to move away from the housing 110 until it reaches the preset position, it means that the third transmission last tooth 15332 meshes with the second transmission gear 162. At this time, the first transmission rack 153 is in the second state, that is, the first transmission rack 153 is in the fully extended state.

[0172] The third transmission initial tooth 15331 and the third transmission final tooth 15332 are offset in the width direction of the first transmission rack 153, wherein the width direction of the first transmission rack 153 is perpendicular to the movement direction of the first transmission rack 153.

[0173] It should be noted that the offset setting makes the lever arm at the initial position smaller than the lever arm at the final position, thereby enabling the push rod 152 to provide a greater thrust at the moment of activation, in order to overcome the resistance in the initial stage of opening the door 120.

[0174] Accordingly, the moving direction of the first transmission rack 153 is X, and the width direction of the first transmission rack 153 is W.

[0175] like Figure 23 and Figure 24 As shown, the third transmission initial tooth 15331 and the third transmission final tooth 15332 have an offset of D in the width direction of the first transmission rack 153.

[0176] In some alternative implementations, the offset is between 5mm and 15mm.

[0177] It should be noted that this configuration serves two purposes: firstly, it ensures that the push rod 152 can provide greater thrust at startup when engaged with the second transmission gear 162; secondly, it avoids occupying too much space.

[0178] In other words, if the offset is less than 5mm, the connection direction of the multiple third transmission teeth 1533 is almost consistent with the movement direction of the first transmission rack 153. Therefore, the second transmission gear 162 and the first transmission rack 153 cannot provide the push rod 152 with excessive instantaneous thrust.

[0179] If the offset is greater than 15mm, the structure of the second transmission gear 162 will occupy more space. In other words, the difference between the pitch circle radius of the fourth transmission initial tooth 16211 and the pitch circle radius of the fourth transmission final tooth 16212 will be too large, which will affect the stability of the entire transmission gear system 160.

[0180] In some embodiments, the offset is 10 mm, that is, the lever arm of the third transmission initial tooth 15331 is 10 mm smaller than the lever arm of the third transmission final tooth 15332.

[0181] [Transmission Gear System 160]

[0182] The automatic switching unit may further include a transmission gear system 160, which can be mounted on the housing 180. The transmission gear system 160 may include at least one first transmission gear 161, which connects the drive mechanism 140 and the actuator 150. The drive mechanism 140 can transmit driving force to the actuator 150 through the transmission gear system 160, thereby actuating the actuator 150. By setting the transmission gear system 160, the layout flexibility of the drive mechanism 140 and the actuator 150 can be improved, which is beneficial to the miniaturization of the automatic switching unit. The transmission gear system 160 can also adjust parameters such as the speed, torque, and direction of the driving force to meet the driving force requirements of the actuator 150. In addition, the transmission gear system 160 has high transmission efficiency and transmission accuracy, which can reduce the driving power requirements of the drive mechanism 140, thereby reducing the cost of the drive mechanism 140, and thus reducing the component cost of the automatic switching unit, while also enhancing the stability during transmission.

[0183] For example, the transmission gear system 160 also includes a second transmission gear 162 that meshes with the first transmission rack 153, the second transmission gear 162 being able to mesh with the first transmission rack 153.

[0184] For example Figures 5 to 7 As shown, there can be two first transmission gears 161. One of the two first transmission gears 161 can be coaxially arranged with the first worm gear 143. The other first transmission gear 161 can be coaxially arranged with the second transmission gear 162 and mesh with one of the first transmission gears 161.

[0185] For example, when the first worm gear 143 rotates, it can drive the first transmission gear 161, which is coaxially arranged with it, to rotate. This first transmission gear 161 drives another first transmission gear 161 to rotate, and in turn drives the second transmission gear 162 to rotate. It is understood that in different possible implementations of the embodiments of this application, the number of first transmission gears 161 can be set according to specific circumstances, and this embodiment of the application will not elaborate on this.

[0186] The second transmission gear 162 can be an incomplete gear. When the second transmission gear 162 meshes with the first transmission rack 153, the drive mechanism 140 can drive the push rod 152 to extend through the second transmission gear 162, thereby applying a pushing force to the first door 121 and opening the first door 121. When the push rod 152 extends to a preset length, the second transmission gear 162 separates from the first transmission rack 153, and the push rod 152 can automatically reset under the action of the third elastic element 154, eliminating the need for a reset operation and improving the convenience of using the automatic switch unit.

[0187] For example, such asFigure 5 and Figure 7 As shown, when the drive motor 141 is activated, it drives the first worm gear 142 to rotate. The first worm gear 142 drives the first worm wheel 143 to rotate clockwise. The first worm wheel 143 drives the first transmission gear 161, which is coaxially mounted therewith, to rotate clockwise. This first transmission gear 161 drives another first transmission gear 161 to rotate counterclockwise. The other first transmission gear 161 drives the second transmission gear 162 to rotate counterclockwise, causing the second transmission gear 162 to mesh with the first transmission rack 153. The drive motor 141 continues to operate, causing the second transmission gear 162 to drive the meshing first transmission rack 153 to move along the depth direction x. This causes the push rod 152 to move relative to the housing 110 along the depth direction x, applying a pushing force to the first door 121, thereby automatically opening the first door 121.

[0188] like Figure 6 and Figure 7 As shown, when the push rod 152 extends to a preset length, the second transmission gear 162 disengages from the first transmission rack 153, thereby disengaging the push rod 152 from the transmission gear system 160. The third elastic element 154 applies a first force opposite to the depth direction x to the push rod 152, causing the push rod 152 to retract into the housing 180. Without the need for the drive motor 141 to drive the push rod 152 to reset, the control is not only more flexible, intelligent, and user-friendly, but also significantly reduces the noise generated during device operation. Afterwards, the user can continue to manually open the first door 121 to open it to a greater angle.

[0189] In a typical push rod and the final gear of the transmission mechanism, a standard circular gear and rack combination is usually used. Theoretically, the thrust provided by the push rod is constant throughout its movement. However, due to negative pressure and the door's suction force, a greater opening force is required at the moment the door opens. To address this issue, the second type of actuator was described above. The following explanation uses the second type of transmission gear system corresponding to the second actuator as an example:

[0190] like Figures 22 to 25 As shown, the transmission gear system 160 includes a second transmission gear 162. The actuator 150 and the drive mechanism 140 are connected by the second transmission gear 162. The second transmission gear 162 is a non-circular gear and can mesh with the first transmission rack 153.

[0191] It should be noted that the second transmission gear 162 is an irregular gear, that is, a non-circular gear. This can be understood as the distance between the teeth on the second transmission gear 162 and the center of the second transmission gear 162 being inconsistent.

[0192] For exampleFigures 22 to 25 As shown, there can be two first transmission gears 161. One of the two first transmission gears 161 can be coaxially arranged with the first worm gear 143. The other first transmission gear 161 can be coaxially arranged with the second transmission gear 162 and mesh with one of the first transmission gears 161.

[0193] For example, when the first worm gear 143 rotates, it can drive the first transmission gear 161, which is coaxially arranged with it, to rotate. This first transmission gear 161 drives another first transmission gear 161 to rotate, and in turn drives the second transmission gear 162 to rotate. It is understood that in different possible implementations of the embodiments of this application, the number of first transmission gears 161 can be set according to specific circumstances, and this embodiment of the application will not elaborate on this.

[0194] The second transmission gear 162 can be an incomplete gear. When the second transmission gear 162 meshes with the first transmission rack 153, the drive mechanism 140 can drive the push rod 152 to extend through the second transmission gear 162, thereby applying a pushing force to the first door 121 and opening the first door 121. When the push rod 152 extends to a preset length, the second transmission gear 162 separates from the first transmission rack 153, and the push rod 152 can automatically reset under the action of the third elastic element 154, eliminating the need for a reset operation and improving the convenience of using the automatic switch unit.

[0195] In some alternative embodiments, the second transmission gear 162 has a plurality of fourth transmission teeth 1621, which are spaced apart in the circumferential direction of a portion of the second transmission gear 162.

[0196] It should be noted that the second transmission gear 162 can mesh with the first transmission rack 153, and a plurality of fourth transmission teeth 1621 spaced apart can be provided on a portion of the circumference of the second transmission gear 162. In other words, the second transmission gear 162 can be an incomplete gear.

[0197] When multiple fourth transmission teeth 1621 mesh with the first transmission rack 153, the drive mechanism 140 can drive the push rod 152 to extend via the second transmission gear 162, thereby applying a pushing force to the first door 121 and opening it. When the push rod 152 extends to a preset length, the multiple fourth transmission teeth 1621 separate from the first transmission rack 153, and the push rod 152 can automatically reset under the action of the third elastic element 154, eliminating the need for a reset operation and improving the convenience of using the automatic switch unit.

[0198] In some optional embodiments, the plurality of fourth transmission teeth 1621 include a fourth transmission initial tooth 16211 and a fourth transmission final tooth 16212, wherein the fourth transmission final tooth 16212 is away from the first transmission rack 153 when the first transmission rack 153 is in the first state.

[0199] The pitch circle radius of the fourth transmission final tooth 16212 is greater than the pitch circle radius of the fourth transmission initial tooth 16211.

[0200] It should be noted that when the first transmission rack 153 is in the first state, that is, the first transmission rack 153 is in the retracted state, the first transmission rack 153 is not yet engaged with the second transmission gear 162, the fourth transmission last tooth 16212 is away from the first transmission rack 153, and the fourth transmission first tooth 16211 faces and is close to the first transmission rack 153.

[0201] Specifically, when the first transmission rack 153 begins to extend out of the housing 180, the third transmission initial tooth 15331 first engages with the fourth transmission initial tooth 16211. As the extension length of the push rod 152 increases, the third transmission initial tooth 15331 moves along the depth direction x of the housing 110, and the fourth transmission initial tooth 16211 rotates counterclockwise. The third transmission initial tooth 15331 gradually moves away from the fourth transmission initial tooth 16211. Subsequently, the other third transmission teeth 1533 between the third transmission initial tooth 15331 and the third transmission final tooth 15332 engage with the other fourth transmission teeth 1621 between the fourth transmission initial tooth 16211 and the fourth transmission final tooth 16212. At this time, the first transmission rack 153 is in the third state, that is, the first transmission rack 153 is in the semi-expanded state.

[0202] When push rod 152 continues to move away from housing 110 until it reaches the preset position, it means that the third transmission last tooth 15332 and the fourth transmission last tooth 16212 are engaged and driven, and the third transmission last tooth 15332 and the fourth transmission last tooth 16212 are disengaged. At this time, the first transmission rack 153 is in the second state, that is, the first transmission rack 153 is in the fully extended state. Push rod 152 can automatically reset under the action of the third elastic element 154, without the need to reset push rod 152, which improves the convenience of using the automatic switch unit.

[0203] It is understandable that, since the second transmission gear 162 is a non-circular gear, the initial position of the tooth is closest to the center of the circle. That is, the fourth transmission initial tooth 16211 is closest to the center of the circle. Referring to the formula F = T / r, where F is the thrust that can be provided to the push rod 152, T is the torque of the second transmission gear 162, and r is the distance between the fourth transmission tooth 1621 and the center of the circle, the torque of the second transmission gear 162 is constant. The smaller r is, the larger F is. In other words, the fourth transmission initial tooth 16211 is closest to the center of the circle, which can provide a greater thrust to the push rod 152. This allows the push rod 152 to provide a greater thrust at the moment of activation under the action of the driving force, so as to overcome the resistance in the initial stage of opening the door 120.

[0204] In some alternative embodiments, the ratio between the pitch circle radius of the fourth drive final tooth 16212 and the pitch circle radius of the fourth drive initial tooth 16211 is between 2 and 3.

[0205] It should be noted that the difference between the pitch circle radius of the fourth transmission final tooth 16212 and the pitch circle radius of the fourth transmission initial tooth 16211 is the offset between the third transmission initial tooth 15331 and the third transmission final tooth 15332 in the width direction of the first transmission rack 153.

[0206] In addition, this configuration ensures that the push rod 152 can provide greater thrust at the moment of startup when it meshes with the second transmission gear 162; on the other hand, it avoids occupying too much space.

[0207] In some alternative embodiments, the included angle between the fourth drive final tooth 16212 and the fourth drive initial tooth 16211 is between 250° and 280°.

[0208] It should be noted that the pitch circle trajectory of the second transmission gear 162 is as follows: Figure 25 As shown, ρ0 is the pitch circle radius of the fourth transmission initial tooth 16211, ρ is the distance from any point on the pitch circle trajectory to the center, θ is the angle between this tooth and the fourth transmission initial tooth 16211, and α is the effective rotation angle between the fourth transmission final tooth 16212 and the fourth transmission initial tooth 16211.

[0209] Reference: The polar equation of the pitch circle trajectory is ρ=ρ0+D*θ / α.

[0210] D = ρmax - ρ0 (that is, the difference between the pitch circle radius of the fourth transmission last tooth 16212 and the pitch circle radius of the fourth transmission first tooth 16211 is equal to the offset of the first and last effective teeth of the third transmission first tooth 15331 and the third transmission last tooth 15332).

[0211] For example, in one embodiment of this application, it is assumed that: ρ0 = 18mm, D = 10mm, the included angle between two adjacent fourth transmission teeth 1621 is 20 degrees, and the included angle between the fourth transmission end tooth 16212 and the fourth transmission beginning tooth 16211 is 260°. Taking the second fourth transmission tooth 1621 after the fourth transmission beginning tooth 16211 as an example, its pitch circle radius ρ = ρ0 + D*θ / α = 18 + 10*20 / 260 ≈ 18.77mm. Calculating the change in lever arm, the lever arm L0 of the fourth transmission beginning tooth 16211 is 18mm, and the lever arm Lmax of the fourth transmission end tooth 16212 is 28mm. Lmax / L0 ≈ 1.56, that is, the force of the fourth transmission beginning tooth 16211 is approximately 1.56 times that of the fourth transmission end tooth 16212.

[0212] Therefore, the same drive motor 141, which is connected to the push rod 152 with the non-circular structure second transmission gear 162, can output a greater thrust at the moment of startup. That is to say, under the condition that the output thrust of the two at the moment of startup is the same, the power of the drive motor 141 required is only 64% (1 / 1.56) of that of the ordinary drive motor 141. This means that the cost of the drive motor 141 is reduced and the size is reduced accordingly, which is more advantageous for assembly.

[0213] The refrigerator provided in this application embodiment includes: a cabinet; a door slidably connected to the cabinet; an automatic switch unit, which includes: a drive mechanism configured to provide driving force; an actuator including a first transmission rack configured to move closer to the cabinet or move away from the cabinet under the action of the driving force, the first transmission rack having a plurality of third transmission teeth, the connection direction between the plurality of third transmission teeth having an angle with the moving direction of the first transmission rack; and a transmission gear system including a second transmission gear, the actuator and the drive mechanism being connected by the second transmission gear, the second transmission gear being a non-circular gear, and the second transmission gear being meshable with the first transmission rack.

[0214] By incorporating a first transmission rack in the actuator and a second transmission gear in the transmission gear system, the actuator can slide toward the door under the drive of the drive mechanism, thereby applying a thrust to the door. The actuator can provide a greater thrust at the moment of startup to overcome the resistance in the initial stage of opening the door, and then the thrust decreases linearly while the speed increases linearly, improving the convenience of opening the door and enhancing the user experience.

[0215] [Shell 180]

[0216] The housing 180 includes a first housing 181 and a second housing 182. The first housing 181 has a cavity for accommodating the drive mechanism 140, the actuator 150, the transmission gear train 160, and the sensing mechanism 190.

[0217] The cavity has an opening, and a second housing 182 is provided on the opening. A connecting groove 1821 is provided on the second housing 182, and the connecting groove 1821 is connected to the cavity. A connecting plate 193 is accommodated in the connecting groove 1821.

[0218] It should be noted that the housing 180 can be connected to the enclosure 110. For example, when the automatic switch unit is used to open or close the first door 121, the housing 180 can be connected to the top of the enclosure 110. When the automatic switch unit is used to open or close the second door 122, the housing 180 can be connected to the end side wall of the refrigeration compartment. It is understood that the housing 180 can also be installed in other locations on the enclosure 110, which will not be described in detail in this embodiment.

[0219] The housing 180 may have a cavity within which at least a portion of the drive mechanism 140 and at least a portion of the actuator 150 can be accommodated and installed. By providing the housing 180, at least some components of the automatic switch unit can be housed within the housing 180, enabling modular design of the automatic switch unit and improving the convenience of assembling, installing, and maintaining the automatic switch unit.

[0220] For example, the housing 180 may be a split structure to facilitate the installation of at least a portion of the drive mechanism 140, at least a portion of the actuator 150, or other components within the housing 180. For instance, the housing 180 may include a detachably connected first housing 181 and a second housing 182.

[0221] It is understood that in some possible implementations of the embodiments of this application, the housing 180 may be omitted, and the components of the automatic switching unit may be connected to the housing 110. This application will not elaborate further on this aspect. The technical solution of the embodiments of this application will be described below using the automatic switching unit with housing 180 as an example.

[0222] For example, in order to better install the connecting plate 193, a connecting groove 1821 is formed on the second housing 182. The shape of the connecting groove 1821 matches that of the connecting plate 193 to better accommodate the connecting plate 193.

[0223] In other embodiments, the second housing 182 may not need to have a connecting groove 1821. The connecting plate 193 and the second housing 182 can be directly connected by threads or snap-fit, as long as the connecting plate 193 can be installed.

[0224] [Sensing Mechanism 190]

[0225] like Figures 8 to 10 As shown, it should be noted that the position sensing component 1901 is configured to determine the position of the push rod 152. Specifically, the actuator 150 has three position states: retracted state, semi-extended state, and fully extended state, and thus the position of the push rod 152 is different depending on the three different states.

[0226] The first state of the actuator 150 is the retracted state, the second state of the actuator 150 is the fully deployed state, and the third state of the actuator 150 is the partially deployed state.

[0227] Specifically, when push rod 152 is in the retracted state, it is retracted into housing 180. At this time, neither actuator 150 nor push rod 152 is activated, and door 120 is closed. Then, actuator 150 or push rod 152 activates. Under the driving force provided by drive motor 141, push rod 152 moves away from housing 110, and door 120 gradually opens. At this time, push rod 152 is in a semi-open state. Until push rod 152 is fully open, it has moved away from housing 110 to its furthest distance under the driving force. Then, under the action of third elastic element 154, push rod 152 retracts back into housing 180. This eliminates the need for drive motor 141 to reset push rod 152, making control more flexible, intelligent, and user-friendly, and significantly reducing noise generated during operation. Afterwards, the user can manually open the first door 121 to a greater angle.

[0228] In some related technologies, when the automatic switch unit has a problem where the push rod 152 is stuck or not fully extended, and the door 120 has been manually opened by the user, causing the push rod 152 to fail to reset automatically, i.e. when the push rod 152 has a reset failure, the door 120 cannot be closed, affecting the normal use of the refrigerator 100.

[0229] It should be noted that when the actuator 150 is in the third state, that is, not fully open, if it remains in the extended state, the door 120 will not be able to close. Therefore, at this time, the pressure sensor 1912 can release a disengagement signal to control the actuator 150 to be in the second state, that is, fully open, under the action of the driving force. Then, the push rod 152 is reset under the action of the third elastic element 154 to retract the housing 180, which can ensure that the door 120 is manually closed.

[0230] With the above settings, namely, the actuator 150, the door 120 can be opened automatically. With the pressure sensing component 1902 and the position sensing component 1901, the push rod 152 in the actuator 150 can be reset so that the door 120 can be closed. At the same time, it can also allow users to manually open the door 120 for a longer period of time, avoiding the problem that the door 120 will automatically close under the action of the hinge 1211 when it is opened less than a certain angle. This ensures that the refrigerator 100 can operate normally and improves the functional reliability of the refrigerator 100.

[0231] Refrigerators or wine cabinets use hinges with a self-closing function. When the door is opened to less than a certain angle, the door will automatically close under the action of the hinge. In order to solve the above problem, the first type of sensing mechanism 190 is described below as an example:

[0232] like Figures 8 to 10 As shown, in some alternative embodiments, the pressure sensor 1912 has a switch portion 19121 facing the actuator 150.

[0233] The switch 19121 is configured to contact the actuator 150 under the push of the actuator 150 and move along the side away from the actuator 150 to release the contact signal.

[0234] It should be noted that when the push rod 152 extends, it pushes the door 120 to open, which in turn pushes the switch part 19121. At this time, the switch part 19121 is in a squeezed state and moves away from the push rod 152 in the direction of the opening of the door 120. When it is squeezed, it means that it is in contact with the push rod 152, and then the contact signal can be released.

[0235] In some alternative embodiments, the pressure sensing assembly 1902 further includes a mounting bracket 1915 and a movable element 1913, the mounting bracket 1915 having a mounting cavity into which the pressure sensor 1912 is mounted;

[0236] The mounting bracket has an opening, the movable member 1913 is movably covered by the opening, the switch part 19121 abuts against the inner side of the movable member 1913, and the movable member 1913 is configured to move along the side away from the actuator 150 under the push of the actuator 150 to abut against the mounting bracket 1915.

[0237] Specifically, the movable part 1913 can move relative to the mounting bracket 1915 along the moving direction of the door body 120. When the pressure sensing component 1902 is in the disengaged state, there is a gap between the movable part 1913 and the mounting bracket 1915, and the switch part 19121 is in an uncompressed state at this time.

[0238] When the push rod 152 starts working, it pushes the door 120 to open. At this time, the movable part 1913 moves towards the mounting bracket 1915 under the push of the push rod 152, thereby squeezing the switch part 19121. At this time, the switch part 19121 is in a compressed state.

[0239] It should be noted that the mounting bracket 1915 is designed to better accommodate the switch section 19121, thereby maintaining the integrity of the entire structure and its stability during movement.

[0240] In some alternative embodiments, the pressure sensing assembly 1902 further includes a guide 1916 and a fourth elastic member 1914, the guide 1916 being disposed between the movable member 1913 and the mounting cavity;

[0241] The guide member 1916 is a columnar member, and the fourth elastic member 1914 is a compression spring. The fourth elastic member 1914 is sleeved on the outer periphery of the guide member 1916 and is located between the inner side of the movable member 1913 and the bottom wall of the mounting cavity.

[0242] It should be noted that the guide member 1916 and the fourth elastic member 1914 are provided so that the movable member 1913 can move toward the mounting bracket 1915 under the push of the push rod 152, or can be reset under the action of the fourth elastic member 1914 when it is disengaged from the push rod 152.

[0243] The guide member 1916 is provided to guide the fourth elastic member 1914 from its natural state to its compressed state, or from its compressed state to its natural state, so as to prevent the fourth elastic member 1914 from deviating during movement.

[0244] In some alternative embodiments, the transmission gear system 160 includes a second transmission gear 162 and at least one first transmission gear 161. The second transmission gear 162 is coaxially arranged with the first transmission gear 161. One of the first transmission gear 161 and the second transmission gear 162 is connected to the drive mechanism 140, and the other is connected to the actuator 150.

[0245] It should be noted that when the first worm gear 143 rotates, it can drive the first transmission gear 161, which is coaxially arranged with it, to rotate. The first transmission gear 161 drives another first transmission gear 161 to rotate, and drives the second transmission gear 162 to rotate.

[0246] The second transmission gear 162 can be an incomplete gear. When the second transmission gear 162 meshes with the first transmission rack 153, the drive mechanism 140 can drive the push rod 152 to extend through the second transmission gear 162, thereby applying a pushing force to the first door 121 and opening the first door 121. By setting an incomplete gear, when the refrigerator door or drawer of the refrigerator 100 is pushed open, the push rod 152 is cleverly reset through the third elastic element 154, so there is no need for the drive motor 141 to work and drive the push rod 152 to reset. This not only makes the control more flexible, intelligent, and user-friendly, but also greatly reduces the noise generated by the device.

[0247] In some embodiments, the radial dimension of the second transmission gear 162 is smaller than the radial dimension of the first transmission gear 161, meaning that the second transmission gear 162 can avoid obstruction while transmitting torque.

[0248] The first sensing element 191, the first position sensor 192, and the second position sensor 194 ensure unobstructed detection between the position sensor and the first sensing element 191, resulting in better detection performance.

[0249] The position sensing assembly 1901 includes a first sensing element 191 and at least two position sensors. One of the first sensing element 191 and the position sensors is disposed on the second transmission gear 162, and the other is disposed on the housing 180. The first sensing element 191 is configured to determine the position state of the actuator 150 based on the change in the corresponding position between itself and the at least two position sensors.

[0250] Specifically, since one of the first sensing element 191 and the position sensor is disposed on the second transmission gear 162 and the other is disposed on the housing 180, and the second transmission gear 162 rotates relative to the housing 180, the position between the first sensing element 191 and the position sensor changes. The position sensor then releases a position change signal to the automatic switch unit based on the position change between the two, and the automatic switch unit controls the door 120 to move away from or closer to the housing 110 under the action of the driving force.

[0251] For example, one of the first sensing element 191 and the position sensor is disposed on the second transmission gear 162, and the other is disposed on the connecting plate 193, which is mounted on the housing 180.

[0252] For example, the connecting plate 193 is detachably connected to the housing 180. It should be noted that by making the connecting plate 193 and the housing 180 detachably connected, the connecting plate 193 can be installed and removed, which facilitates the use and maintenance of the connecting plate 193.

[0253] For example, in order to better install the connecting plate 193, a connecting groove is provided on the housing 180, and the shape of the connecting groove matches that of the connecting plate 193 to better accommodate the connecting plate 193.

[0254] In other embodiments, the housing 180 may not need to have a connecting groove. The connecting plate 193 and the housing 180 can be directly connected by threads or snap-fit, as long as the connecting plate 193 can be installed.

[0255] In some alternative embodiments, the second transmission gear 162 is connected to the actuator 150 in a transmission manner;

[0256] At least two position sensors include a first position sensor 192 and a second position sensor 194, which are spaced apart on the second transmission gear 162 along the rotation direction of the second transmission gear 162.

[0257] For example, the first position sensor 192 and the second position sensor 194 can both be Hall sensors.

[0258] In some alternative implementations, when the first sensor 191 faces the first position sensor 192, the actuator 150 is in a first state or a second state; when the first sensor 191 faces the second position sensor 194, the actuator 150 is in a third state.

[0259] Specifically, in order to facilitate the detection or determination of the position status of the actuator 150, a first sensing element 191, a first position sensor 192, and a second position sensor 194 are added for matching detection.

[0260] When the first sensing element 191 faces the first position sensor 192, the actuator 150 is in the first state, which means that the actuator 150 or the push rod 152 is in the retracted state, and the push rod 152 is retracted into the housing 180. At this time, the actuator 150 or the push rod 152 has not started to work, and thus the door 120 is in the closed state.

[0261] When the actuator 150 or push rod 152 starts working, the push rod 152 moves away from the housing 110 under the driving force provided by the drive motor 141, and the door 120 is gradually opened. At this time, the push rod 152 is in a semi-open state, and the first sensing element 191 faces the second position sensor 194, that is, the actuator 150 is determined to be in the third state.

[0262] Next, under the driving force, the push rod 152 moves away from the housing 110 to its furthest distance. At this time, the first sensor 191 has rotated 360° under the drive of the second transmission gear 162, and the first sensor 191 is now facing the first position sensor 192. That is, the first sensor 191 returns to its initial position, and the push rod 152 is now in a fully extended state, that is, the actuator 150 is confirmed to be in the second state. Afterwards, under the action of the third elastic element 154, the push rod 152 retracts back into the housing 180.

[0263] The first sensing element is a magnetic element, and at least one of the first position sensor and the second position sensor is a Hall sensor.

[0264] It should be noted that, as can be understood, the embodiments of this application do not impose any special restrictions on the first sensing element 191, as long as it meets the requirement of being able to cooperate with the first position sensor 192 and the second position sensor 194 to generate an electrical signal.

[0265] Optionally, the first sensing element 191 can be a magnetizing coil or a permanent magnet. Permanent magnets are widely available and inexpensive, which helps to reduce the overall manufacturing cost of the refrigerator 100. Moreover, compared with magnetizing coils, permanent magnets can generate a magnetic field without electricity, saving energy and having a simpler structure.

[0266] Preferably, the permanent magnet is a cylindrical permanent magnet. Specifically, the N pole of the permanent magnet emits magnetic field lines from the S pole, enabling the first position sensor 192 and the second position sensor 194 to effectively sense the magnetic field lines and generate an electrical signal.

[0267] In other embodiments, the first sensing element is a light-emitting element, and at least one of the first position sensor and the second position sensor is a light sensor. The first sensing element 191 is a light-emitting element, and the first position sensor 192 and the second position sensor 194 are light sensors. The position state of the actuator 150 is determined by the change in the light signal between the light sensor and the light-emitting element.

[0268] In some alternative embodiments, along the rotation direction of the second transmission gear 162, the second position sensor 194 is close to the first position sensor 192 in the second state and is located in front of the first position sensor 192 in the second state.

[0269] It should be noted that the second transmission gear 162 and the first transmission gear 161, which are coaxially arranged with it, rotate in the same direction, but in the opposite direction to the rotation of the other transmission gear, thus matching the rotation direction of the first worm gear 143. In other words, the rotation direction of the second transmission gear 162 is related to the rotation directions of the first worm 142, the first worm gear 143, and the first transmission gear 161, and can be adjusted accordingly based on the actual situation.

[0270] For example, such as Figure 5 and Figure 6 As shown, when the drive motor 141 is activated, it drives the first worm gear 142 to rotate. The first worm gear 142 drives the first worm wheel 143 to rotate clockwise. The first worm wheel 143 drives the first transmission gear 161, which is coaxial with it, to rotate clockwise. The first transmission gear 161 drives another first transmission gear 161 to rotate counterclockwise. The other first transmission gear 161 drives the second transmission gear 162 to rotate counterclockwise, so that the second transmission gear 162 meshes with the first transmission rack 153. At this time, the first sensing element 191 rotates under the rotation of the second transmission gear 162. From being directly facing the first position sensor 192 in the first state, it gradually moves away from the first position sensor 192 and closer to the second position sensor 194, thereby driving the push rod 152 to move relative to the housing 110 along the depth direction x, so as to apply a pushing force to the first door 121, thereby automatically opening the first door 121 and entering the third state. When the door 120 is opened again and is directly facing the first position sensor 192, it enters the second state.

[0271] In other words, when the second transmission gear 162 rotates, the second position sensor 194 is close to the first position sensor 192 in the second state, away from the first position sensor 192 in the first state, and located in front of the first position sensor 192 in the second state.

[0272] This application also provides a control method for a refrigerator 100, the method comprising:

[0273] S101: Obtain the position information of the actuator and the pressure information of the pressure sensing component;

[0274] For example, the controller can be configured as follows: Figure 11 The control method shown controls the automatic switching unit.

[0275] For example, when the controller does not receive an automatic door opening signal, the control actuator 150 is in a first state, the actuator 150 or the push rod 152 is in a retracted state, and the push rod 152 is retracted into the housing 180. At this time, the actuator 150 or the push rod 152 has not started to work, and the door 120 is in a closed state.

[0276] For example, after receiving an automatic door opening signal, the controller can control the actuator 150 to be in a third state, and control the drive motor 141 to extend the push rod 152 to automatically open the door. The first sensor 191 faces the second position sensor 194, and the extension length of the push rod 152 has not reached the preset position, that is, it has not yet reached the farthest length.

[0277] For example, upon receiving an automatic door opening signal, the controller can send an extension signal to the drive motor 141 of the drive mechanism 140. In response to the extension signal, the drive motor 141 drives the transmission gear system 160 to operate, which in turn causes the push rod 152 to slide and extend along the first direction x. The push rod 152 applies a pushing force to the door body 120 to achieve automatic door opening.

[0278] like Figures 4 to 11 As shown, when push rod 152 extends a preset length along the first direction x, push rod 152 moves away from housing 110 to its furthest distance under the action of driving force. At this time, the first sensor 191 has rotated 360° under the drive of the second transmission gear 162, and the first sensor 191 is facing the first position sensor 192. That is, the first sensor 191 returns to its initial position, and the controller can control the drive motor 141 to stop. The controller can determine that push rod 152 has extended the preset length by acquiring the signal triggered by the first position sensor 192. At this time, push rod 152 is in the fully extended state, that is, the actuator 150 is determined to be in the second state. Then, the controller can send a stop signal to drive motor 141. Drive motor 141 stops the drive transmission gear system 160 in response to the stop signal. Push rod 152 can automatically reset under the action of the third elastic member 154 and retract back into housing 180.

[0279] For example, the refrigerator 100 may be equipped with an automatic door opening button. The automatic door opening signal can be generated by the user pressing the automatic door opening button, enabling the refrigerator 100 to respond to the user's operation and automatically open the door, thereby improving the human-computer interaction performance of the refrigerator 100. Alternatively, the automatic door opening signal may also be generated in other ways, which will not be described in detail in this embodiment.

[0280] It should be noted that this setting allows the controller to more accurately determine the position of the push rod 152, thereby improving the functional reliability of the automatic switching unit.

[0281] S102: Based on the position and pressure information, control the actuator to reset.

[0282] It should be noted that the pressure sensing component 1902 can release a contact signal or a release signal. Correspondingly, the contact signal indicates that the pressure sensing component 1902 is in contact with and squeezed by the actuator 150. When the pressure sensing component 1902 is separated from the actuator 150, the pressure sensing component 1902 is in a pressure-free state and releases the release signal.

[0283] When the pressure sensing component 1902 releases a disengagement signal, it means that the door 120 is opened. At this time, the push rod 152 is still outside the housing 180, extending outwards. The controller needs to further control the push rod 152 to reset and retract into the housing 180.

[0284] like Figure 12 As shown, in some optional embodiments, the actuator is controlled to reset based on the position information and pressure information, specifically including:

[0285] S201: When the position information indicates that the actuator is in a semi-deployed state and the pressure information indicates a disengagement, control the actuator to be in a fully deployed state under the action of the driving force.

[0286] S202: When the actuator is in the fully extended state, control the actuator to reset to the retracted state.

[0287] It should be noted that this setting takes into account that when the push rod 152 extends out of the housing 180 to push the door 120 open, but has not yet extended to the preset position, the user manually opens the door 120. At this time, the push rod 152 is still in the third state, that is, the not fully open state. If it remains in the extended state, the door 120 will not be able to close. Therefore, at this time, the pressure sensor 1912 can release a disengagement signal to control the actuator 150 to be in the second state, that is, fully open, under the action of the driving force. Then, the push rod 152 is reset under the action of the third elastic element 154 to retract the housing 180, which can ensure that the door 120 is manually closed.

[0288] The refrigerator and refrigerator control method provided in this application include: a cabinet; a door slidably connected to the cabinet; an automatic switch unit, which includes: a housing; a drive mechanism configured to provide a driving force; an actuator configured to move closer to the cabinet or move away from the cabinet under the action of the driving force; a transmission gear system configured to connect the drive mechanism and the actuator; and a sensing mechanism electrically connected to the automatic switch unit, the sensing mechanism including: a position sensing component configured to determine the position state of the actuator; and a pressure sensing component disposed on the door, the pressure sensing component including a pressure sensor configured to contact the actuator under the push of the actuator to release a contact signal, or to disengage from the actuator to release a disengagement signal; when the actuator is in a third state and the pressure sensor releases the disengagement signal, the actuator moves to a second state under the action of the driving force to reset the actuator to a first state.

[0289] By configuring the actuator, the door can be opened automatically. By configuring the pressure sensing component and the position sensing component, the push rod in the actuator can be reset so that the door can be closed. At the same time, it can also allow users to manually open the door for a longer period of time, avoiding the problem that the door will automatically close under the action of the hinge when it is opened less than a certain angle. This ensures that the refrigerator can operate normally and improves the functional reliability of the refrigerator.

[0290] Figure 13 This is a schematic diagram of the structure of the second automatic switching unit in the refrigerator in the first state according to the embodiments of this application. Figure 14 This is an exploded view of the second automatic switching unit in a refrigerator provided in an embodiment of this application. Figure 15 This is an exploded view of the second type of partial automatic switching unit in a refrigerator provided in an embodiment of this application. Figure 16 This is a schematic diagram of the structure of the second type of partial automatic switching unit in a refrigerator provided in an embodiment of this application. Figure 17 This is a structural schematic diagram of another refrigerator in a second state, provided as an embodiment of this application, from a second perspective. Figure 18 This is a schematic diagram of the structure of the automatic switching unit in the refrigerator in the second state according to an embodiment of this application.

[0291] Automatic refrigerator doors have appeared on the market, but due to unreasonable structural design, they are large in size, require high-level technology, and have high production costs. They are also not stable enough when opening and closing the refrigerator door and are noisy.

[0292] To overcome the aforementioned shortcomings, for example, such as Figures 1 to 3 as well as Figures 13 to 18 As shown, the second type of sensing mechanism 190 will be described below:

[0293] The sensing mechanism 190 is electrically connected to the automatic switch unit. The sensing mechanism 190 includes a first sensing element 191, a first position sensor 192, and a connecting plate 193. The connecting plate 193 is mounted on the housing 180. The projection of the connecting plate 193 in a first direction is located within the rotation trajectory of the first transmission gear 161. The first direction is the direction perpendicular to the rotation surface of the first transmission gear 161.

[0294] One of the first sensing element 191 and the first position sensor 192 is disposed on the first transmission gear 161, and the other is disposed on the connecting plate 193. The first position sensor 192 is configured to determine the position state of the actuator 150 based on the position change between it and the first sensing element 191.

[0295] It should be noted that, since one of the first sensing element 191 and the first position sensor 192 is disposed on the first transmission gear 161 and the other is disposed on the connecting plate 193, and the first transmission gear 161 rotates relative to the connecting plate 193, the position between the first sensing element 191 and the first position sensor 192 changes. Consequently, the first position sensor 192 releases a position change signal to the automatic switch unit based on the position change between the two, and the automatic switch unit controls the door 120 to move away from the box 110 or move closer to the box 110 under the action of the driving force.

[0296] For example, the connecting plate 193 is detachably connected to the housing 180. It should be noted that by making the connecting plate 193 and the housing 180 detachably connected, the connecting plate 193 can be installed and removed, which facilitates the use and maintenance of the connecting plate 193.

[0297] Furthermore, since the projection of the connecting plate 193 in the first direction is located within the rotation trajectory of the first transmission gear 161, this arrangement can reduce the space occupied by the connecting plate 193 compared to the existing structure, thereby reducing the volume of the housing 180 and the space occupied by the automatic switch unit, thus achieving miniaturization.

[0298] With the above-mentioned configuration, namely, the configuration of the sensing mechanism 190, the position change between the first sensing element 191 and the first position sensor 192 can be detected. The first position sensor 192 will then send the released position change signal to the automatic switching unit. The automatic switching unit can then control the position state of the drive actuator 150 and determine the position state of the actuator 150. The entire sensing and determination process has high accuracy, and the use of the first position sensor 192 results in lower cost. In addition, the installation position of the connecting plate 193 is more conducive to expanding the internal space of the housing 180 or reducing the volume of the box 110 occupied by the housing 180, saving installation space, reducing process requirements and production costs, and improving the reliability and stability of operation, thereby achieving miniaturization of the automatic switching unit.

[0299] In some alternative embodiments, when the first sensing element 191 faces the first position sensor 192 along the first direction, the actuator 150 is in a first state or a second state; wherein the first state and the second state are states in which the actuator 150 is located at different positions in the housing 110, the first state is the retracted state of the actuator 150, and the second state is the fully extended state of the actuator 150.

[0300] It should be noted that this configuration is intended to improve the accuracy of signal sensing between the first position sensor 192 and the first sensing element 191.

[0301] Specifically, when the push rod 152 is in the retracted state, it means that the first door 121 is in the closed state. At this time, the first sensor 191 and the first position sensor 192 are positioned opposite each other, that is, the first sensor 191 is facing the first position sensor 192.

[0302] When the push rod 152 is in the fully extended state, the position between the first position sensor 192 and the first sensing element 191 returns to the initial position. Thus, the first sensing element 191 and the first position sensor 192 are positioned facing each other, that is, the first sensing element 191 faces the first position sensor 192.

[0303] In some alternative embodiments, the first sensor 191 is disposed on the first transmission gear 161, and the first sensor 191 rotates relative to the first position sensor 192 when the first transmission gear 161 rotates.

[0304] When the first sensing element 191 moves relative to the first position sensor 192, the actuator 150 is in a third state, wherein the third state is the state in which the actuator 150 is not fully deployed, and the third state is an intermediate state between the first state and the second state.

[0305] For example, when the first sensor 191 rotates relative to the first position sensor 192, it means that the distance between the first position sensor 192 and the first sensor 191 changes. At this time, the first position sensor 192 releases a signal to the automatic switch unit. When the drive mechanism 140 is activated, the output shaft of the drive motor 141 rotates, and the output shaft drives the first worm gear 142 to rotate. The first worm gear 142 drives the first worm wheel 143 meshing with it to rotate. The first worm wheel 143 drives the push rod 152 to slide relative to the housing 110 in the depth direction X. As a result, the actuator 150 is in a partially unfolded state, that is, it pushes the first door 121 to move in a direction away from the housing 110.

[0306] Specifically, when the first position sensor 192 and the first sensing element 191 are in their initial positions, the first sensing element 191 has rotated 360° under the drive of the first transmission gear 161. That is, the first sensing element 191 returns to its initial position and faces the first position sensor 192. At this time, the first position sensor 192 releases a signal to the automatic switch unit, and the drive mechanism 140 stops operating, thereby causing the push rod 152 to disengage from the transmission gear system 160. The third elastic element 154 applies a first force opposite to the depth direction x to the push rod 152, causing the push rod 152 to retract into the housing 180.

[0307] In some alternative implementations, the first sensing element 191 is a magnetic element, and the first position sensor 192 is a Hall sensor.

[0308] It should be noted that, as can be understood, the embodiments of this application do not impose any special restrictions on the first sensing element 191, as long as it meets the requirement of being able to cooperate with the first position sensor 192 to generate an electrical signal.

[0309] Optionally, the first sensing element 191 can be a magnetizing coil or a permanent magnet. Permanent magnets are widely available and can be purchased at low cost, which helps reduce the overall manufacturing cost of the refrigerator 100. Moreover, compared with magnetizing coils, permanent magnets can generate a magnetic field without electricity, saving energy and having a simpler structure.

[0310] Preferably, the permanent magnet is a cylindrical permanent magnet. Specifically, the N pole of the permanent magnet emits magnetic field lines from the S pole, enabling the first position sensor 192 to effectively sense the magnetic field lines and generate an electrical signal.

[0311] In other embodiments, the first sensing element 191 is a light-emitting element, and the first position sensor 192 is a light sensor. The position state of the actuator 150 is determined by the change in the light signal between the light sensor and the light-emitting element.

[0312] In some alternative embodiments, the connecting plate 193 faces the first transmission gear 161 and is located on the side of the first transmission gear 161 opposite to the actuator 150.

[0313] It should be noted that the position of the connecting plate 193 can save space and reduce costs on the one hand; on the other hand, it can be kept away from the actuator 150, so as to avoid obstructing the actuator 150 during operation. The whole arrangement makes the structure more reasonable and compact.

[0314] In some alternative embodiments, the connecting plate 193 has a connecting surface, the first transmission gear 161 has a first transmission surface, and the connecting surface faces the first transmission surface;

[0315] The first sensing element 191 is located on the first transmission surface, and the first position sensor 192 is disposed on the connecting surface and protrudes toward the first sensing element 191.

[0316] It should be noted that the connecting surface and the first transmission surface are arranged facing each other. The first sensing element 191 is mounted on the first transmission surface, and the first transmission surface supports the first sensing element 191. The first position sensor 192 is mounted on the connecting surface, and the connecting surface supports the first position sensor 192, so that the two can be arranged relative to each other to improve the accuracy of sensing.

[0317] In some alternative implementations, the connecting surface and the first transmission surface are parallel to each other;

[0318] The connection direction between the connecting surface and the first transmission surface is the first direction.

[0319] It should be noted that the connecting surface and the first transmission surface are parallel planes, which can further improve the accuracy of sensing. In addition, it reduces space usage and improves compactness.

[0320] Specifically, the first direction can be the thickness direction of the housing 180, or the connection direction between the connecting surface and the first transmission surface, wherein the thickness direction of the housing 180 is the connection direction between the connecting surface and the first transmission surface.

[0321] The refrigerator provided in this application embodiment includes a cabinet; a door slidably connected to the cabinet; and an automatic switch unit, which includes: a housing; a drive mechanism configured to provide driving force; an actuator configured to move closer to the cabinet or move away from the cabinet under the action of the driving force; a transmission gear system including at least one first transmission gear, wherein the drive mechanism and the actuator are connected through at least one first transmission gear; and a sensing mechanism electrically connected to the automatic switch unit, the sensing mechanism including a first sensing element, a first position sensor, and a connecting plate, the connecting plate being mounted on the housing, and the projection of the connecting plate in a first direction being located within the rotation trajectory of the first transmission gear; one of the first sensing element and the first position sensor being disposed on the first transmission gear, and the other being disposed on the connecting plate, the first position sensor being configured to determine the position state of the actuator based on the position change between the first sensing element and the first sensing element.

[0322] By setting up a sensing mechanism, the position change between the first sensing element and the first position sensor can be detected. The first position sensor will then send the released position change signal to the automatic switching unit. The automatic switching unit can then control the position state of the drive actuator, thereby determining the position state of the actuator. The entire sensing and determination process has high accuracy, and the use of the first position sensor results in lower cost. In addition, the installation position of the connecting plate is more conducive to expanding the internal space of the housing or reducing the volume of the housing, saving installation space, reducing process requirements and production costs, and improving the reliability and stability of operation, so as to achieve miniaturization of the automatic switching unit.

[0323] [Control Circuit Unit 200]

[0324] In some alternative embodiments, if the power fails unexpectedly during motor operation, the rack and pinion are still engaged, and the push rod cannot retract, causing the refrigerator door to fail to close, resulting in rapid leakage of cold air and affecting user experience.

[0325] Figure 19 This is a schematic diagram of the structure of the control circuit unit in the refrigerator provided in an embodiment of this application. Figure 20 This is a schematic diagram of the structure of the control circuit unit in the refrigerator in the first state according to an embodiment of this application. Figure 21This is a schematic diagram of the second state of the control circuit unit in the refrigerator provided in an embodiment of this application.

[0326] To overcome the above-mentioned defects, such as Figures 19 to 21 As shown, a control circuit unit 200 is added, which is electrically connected to the drive motor 141. The control circuit unit 200 includes a main power supply 210 and an auxiliary power supply 220, one of which is electrically connected to the drive motor 141. When the main power supply 210 is electrically connected to the drive motor 141, the drive motor 141 rotates in a first direction, causing the actuator 150 to move away from the housing 110 under the action of the driving force. When the actuator 150 is in a third state, and the auxiliary power supply 220 is electrically connected to the drive motor 141, the drive motor 141 rotates in a second direction, causing the actuator 150 to move closer to the housing 110 under the action of the driving force. The first and second directions are opposite.

[0327] In some related technologies, when the automatic switch unit experiences problems such as the push rod 152 being stuck or the main power supply 210 failing to power, while the first transmission rack 153 and the second transmission gear 162 remain engaged, the push rod 152 cannot retract, i.e., the push rod 152 cannot slide relative to the cabinet 110. When the push rod 152 experiences a reset failure, the door 120 cannot be closed, affecting the normal use of the refrigerator 100.

[0328] Therefore, the control circuit unit 200 provided in this application embodiment can control the drive motor 141 to rotate forward or reverse, thereby enabling the push rod 152 to unfold or retract, so that the refrigerator 100 can be used normally and improving the user experience.

[0329] Specifically, when the main power supply 210 is electrically connected to the drive motor 141, it means that the main power supply 210 is used to supply power to the drive motor 141. At this time, the drive motor 141 rotates in the first direction, for example, the drive motor 141 rotates forward. Under the drive of the drive motor 141, the push rod 152 moves in the direction away from the housing 110. At this time, the push rod 152 changes from the retracted state to the semi-expanded state or the fully expanded state.

[0330] When the push rod 152 is in the semi-open state, it is located outside the cabinet 110. If the main power supply 210 suddenly fails to power or the push rod 152 is jammed, it will be unable to retract or open. To prevent it from remaining in this position and causing the door 120 to fail to close, the auxiliary power supply 220 will supply power to the drive motor 141, causing the drive motor 141 to rotate in the second direction. For example, if the drive motor 141 reverses, it will drive the push rod 152 to retract, switching from the semi-open state to the retracted state.

[0331] For example, such as Figure 5 and Figure 6 As shown, when the main power supply 210 supplies power to the drive motor 141, the drive motor 141 rotates forward, which drives the first worm gear 142 to rotate. The first worm gear 142 drives the first worm wheel 143 to rotate clockwise. The first worm wheel 143 drives the first transmission gear 161, which is coaxial with it, to rotate clockwise. The first transmission gear 161 drives another first transmission gear 161 to rotate counterclockwise. The other first transmission gear 161 drives the second transmission gear 162 to rotate counterclockwise, so that the second transmission gear 162 meshes with the first transmission rack 153, thereby driving the push rod 152 to move relative to the housing 110 along the depth direction x, so as to apply a pushing force to the first door 121, thereby automatically opening the first door 121.

[0332] If the main power supply 210 experiences a sudden power outage, or if the push rod 152 becomes stuck, preventing it from retracting or unfolding, the auxiliary power supply 220 will supply power to the drive motor 141. When the drive motor 141 reverses, it will drive the first worm gear 142 to rotate. The first worm gear 142 will then drive the first worm wheel 143 to rotate counterclockwise. The first worm wheel 143 will drive the first transmission gear 161, which is coaxial with it, to rotate counterclockwise. This first transmission gear 161 will then drive another first transmission gear 161 to rotate clockwise. This second first transmission gear 161 will then drive the second transmission gear 162 to rotate clockwise. This will cause the push rod 152 to move closer to the cabinet 110 and retract into the cabinet 110, allowing the first door 121 to close. This will enable the refrigerator 100 to function normally and improve the user experience.

[0333] With the above settings, that is, with the settings of the control circuit unit 200, when the push rod 152 has a reset failure, the drive motor 141 can be controlled to reverse, so that the push rod 152 can be reset, so that the door 120 can be closed, thereby ensuring that the refrigerator 100 can operate normally and improving the functional reliability of the refrigerator 100.

[0334] In some alternative implementations, when the main power supply 210 is electrically connected to the drive motor 141, the auxiliary power supply 220 is in a charging state.

[0335] When the main power supply 210 is in a power-off state, the auxiliary power supply 220 is in a discharge state.

[0336] It should be noted that, to ensure the sustainability of power supply to the drive motor 141 by the auxiliary power supply 220 in case of a failure of the main power supply 210, the auxiliary power supply 220 is in a charging state when the main power supply 210 is supplying power, providing continuity for subsequent discharge and improving the stability of the control circuit unit 200. If the main power supply 210 fails or malfunctions before the push rod 152 extends but has not reached the preset position, the auxiliary power supply 220 supplies power to the drive motor 141, causing the push rod 152 to retract.

[0337] In some alternative implementations, the auxiliary power source 220 is either a battery or a capacitor.

[0338] It should be noted that either the battery or the capacitor can be used as an auxiliary power source 220V, and the specific power source can be adjusted according to the actual situation.

[0339] Furthermore, capacitors store electrical energy through the accumulation of charge in an electric field, a physical process; batteries, on the other hand, convert electrical energy into chemical energy for storage, and then convert that chemical energy back into electrical energy when needed, a chemical process. Capacitors charge and discharge very quickly, almost instantaneously; batteries charge and discharge more slowly, requiring a longer time. Capacitors can store a relatively limited amount of energy; batteries can store a larger amount. Capacitors typically have a higher total number of charge-discharge cycles; batteries have a relatively lower number. Capacitors experience a rapid voltage drop during discharge; batteries provide a more stable voltage output.

[0340] In some optional embodiments, the control circuit unit 200 further includes a conduction module 230 and a microcontroller module 280. The conduction module 230 includes a first conduction element 231 and a second conduction element 232. The microcontroller module 280 is used to send forward and reverse rotation control signals to the drive motor 141, and the second conduction element 232 collects the forward and reverse rotation control signals.

[0341] When the main power supply 210 is electrically connected to the drive motor 141, the first conductive element 231 is in the conductive state, and the drive motor 141, the main power supply 210 and the first conductive element 231 form the first conductive path.

[0342] When the auxiliary power supply 220 is electrically connected to the drive motor 141, the second conductive element 232 is in a conductive state, and the drive motor 141, the auxiliary power supply 220 and the second conductive element 232 form a second conductive path.

[0343] It should be noted that the structures of the first conductive element 231 and the second conductive element 232 can be the same or different. Their purpose is to connect the first conductive path or the second conductive path so that the main power supply 210 supplies power to the drive motor 141 when it is supplying power normally. When the main power supply 210 is de-energized, the second conductive element 232 is in the conducting state and the first conductive element 231 is in the cut-off state. At this time, the auxiliary power supply 220 supplies power to the drive motor 141 to meet its reverse rotation.

[0344] When the main power supply VCC is working, the auxiliary power supply 220 is always in a charging or standby state. The first conductor 231 is turned on, causing the second conductor 232 to enter the cut-off state. The control signal of the drive motor 141 is controlled by the microcontroller unit (MCU).

[0345] When the main power supply 210VCC is unexpectedly de-energized, the auxiliary power supply 220 replaces the main power supply 210VCC. The first conductive element 231 is cut off due to the power failure of the main power supply 210, and the second conductive element 232 is turned on by the auxiliary power supply 220. The forward and reverse signals of the drive motor 141 are pulled low and enter the reverse state, and the push rod 152 retracts back to the initial state.

[0346] For example, both the second conductive element 232 and the auxiliary power supply 220 have a ground terminal, that is, both are grounded.

[0347] In the embodiments of this application, the push rod 152 runs for a total of 2 seconds, and the upper limit of the capacitor C1 in the circuit is approximately equal to the amount of electricity required for the drive motor 141 to run for 2 seconds.

[0348] In addition, since the push rod 152 is often in the middle position when an unexpected power failure occurs, the reset time is less than 2 seconds. After reaching the initial position, the drive motor 141 will enter a stall state. Therefore, the drive motor 141 needs to use a DC brushed motor that allows stall operation, or a DC brushless motor with built-in current limiting protection.

[0349] In some optional implementations, the conduction module 230 further includes a first diode 233 and a second diode 234, one end of the auxiliary power supply 220 is grounded, the first diode 233 is connected between the main power supply 210 and the other end of the auxiliary power supply 220, and the second diode 234 is connected between the main power supply 210 and the first diode 233.

[0350] The first diode 233 and the second diode 234 are located in the first conduction path.

[0351] It should be noted that the first diode 233 and the second diode 234 provide guidance for the connection between the main power supply 210 and the drive motor 141, providing unidirectional conductivity. In addition, they also provide guidance for the charging of the auxiliary power supply 220.

[0352] Furthermore, the first diode 233 and the second diode 234 can convert AC signals into DC signals; this function is called rectification. They can be used to protect other components, for example, as reverse voltage protection in a circuit to prevent damage from excessive reverse voltage. The circuit's on / off state is controlled by controlling the forward and reverse conduction states of the diodes.

[0353] In some alternative implementations, the conduction module 230 further includes a third diode 235 connected between the auxiliary power supply 220 and the drive motor 141, and the third diode 235 is located in the second conduction path;

[0354] The conduction direction of the third diode 235 is opposite to that of the first diode 233.

[0355] It should be noted that the third diode 235 provides guidance for the connection between the auxiliary power supply 220 and the drive motor 141, providing unidirectional conductivity.

[0356] Specifically, when the main power supply 210VCC is unexpectedly de-energized, the auxiliary power supply 220 replaces the main power supply 210VCC. The first conducting element 231 is cut off due to the power failure of the main power supply 210, and the second conducting element 232 is turned on by the auxiliary power supply 220. At this time, the power supply of the auxiliary power supply 220 is directed to the third diode 235 in one direction and then to the drive motor 141, and to the second conducting element 232 in the other direction, thus forming a closed loop to power the drive motor 141, that is, to supply power to the drive motor 141, causing it to reverse, and then the push rod 152 retracts.

[0357] For example, the third diode 235 and the first diode 233 are arranged in parallel. The first diode 233 enables the circuit of the main power supply 210 to be turned on to the auxiliary power supply 220 to charge the auxiliary power supply 220, and the third diode 235 enables the current of the auxiliary power supply 220 to be turned on to the drive motor 141.

[0358] Specifically, the conduction direction of the third diode 235 is the discharge direction of the auxiliary power supply 220, and the conduction direction of the first diode 233 is the charging direction of the auxiliary power supply 220.

[0359] In some alternative implementations, at least one of the first conductive element 231 and the second conductive element 232 is a transistor;

[0360] The emitter of the first conductive element 231 and the emitter of the second conductive element 232 are both grounded. The base of the first conductive element 231 is connected to the main power supply 210. The collector of the first conductive element 231 is connected to the first diode 233. The base of the second conductive element 232 is connected to the third diode 235. The collector of the second conductive element 232 collects the forward and reverse control signals.

[0361] It should be noted that both the first conducting element 231 and the second conducting element 232 can be NPN transistors.

[0362] Both the first conducting element 231 and the second conducting element 232 are turned on when the base receives a high level and turned off when the base receives a low level.

[0363] Since the voltages at the bases of the first conducting element 231 and the second conducting element 232 are the same, the first conducting element 231 and the second conducting element 232 are always in a state where one is conducting and the other is off. When the level conversion circuit provides a low voltage to the base of the first conducting element 231 and the base of the second conducting element 232, both the first conducting element 231 and the second conducting element 232 are not conducting. When the level conversion circuit provides a high voltage to the base of the first conducting element 231 and the base of the second conducting element 232, both the first conducting element 231 and the second conducting element 232 are conducting.

[0364] Specifically, such as Figure 20 As shown, when the first conducting element 231 is turned on, the collector of the first conducting element 231 is connected to the emitter of the first conducting element 231, and the collector of the first conducting element 231 is grounded, thereby providing a low voltage to the base of the second conducting element 232. At this time, the second conducting element 232 cannot be turned on. Therefore, when the first conducting element 231 is turned on, the second conducting element 232 cannot be turned on.

[0365] like Figure 21 As shown, when the second conductor 232 is turned on, the collector of the second conductor 232 is grounded, and the forward and reverse control signal is pulled low, causing the drive motor 141 to enter the reverse state.

[0366] In some alternative implementations, the control circuit unit 200 further includes a first resistor 240, a second resistor 250, a third resistor 260, and a fourth resistor 270.

[0367] The first resistor 240 is disposed between the base and the emitter of the first conductive element 231; the second resistor 250 is disposed between the first resistor 240 and the main power supply 210; the third resistor 260 is disposed between the collector of the first conductive element 231 and the base of the second conductive element 232; and the fourth resistor 270 is disposed between the third diode 235 and the third resistor 260.

[0368] The main power supply 210, drive motor 141, first conductive element 231, second resistor 250, fourth resistor 270, first diode 233 and second diode 234 are located in the first conductive path, and the auxiliary power supply 220, drive motor 141, second conductive element 232, third resistor 260, fourth resistor 270 and third diode 235 are located in the second conductive path.

[0369] For example, such as Figure 20 As shown, when the main power supply 210 provides a high level to the first conductive element 231 through the second resistor 250, so that the first conductive element 231 is in the conducting state, the drive motor 141, the second resistor 250, the first conductive element 231 are connected to the main power supply 210, so that the drive motor 141 rotates in the forward direction and pushes the push rod 152 to move in the direction away from the housing 110.

[0370] like Figure 21 As shown, the auxiliary power supply 220 provides a high level to the second conductor 232 through the third resistor 260 and the fourth resistor 270, so that the second conductor 232 is in the conducting state. When the second conductor 232 is conducting, the collector of the second conductor 232 is connected to the emitter of the second conductor 232. Since the emitter of the second conductor 232 is grounded, the collector of the second conductor 232 collects the forward and reverse control signal. That is to say, the collector of the second conductor 232 is grounded, and thus the forward and reverse control signal is grounded, so as to control the drive motor 141 to reverse and drive the push rod 152 to move along the direction close to the housing 110.

[0371] In some optional embodiments, the control circuit unit 200 further includes a trigger module disposed between the main power supply 210 and the auxiliary power supply 220. The trigger module includes a controller and a detector, with the detector electrically connected to the controller.

[0372] The detector is used to detect the working status of the main power supply 210. When the detector detects an abnormality in the main power supply 210, it sends an abnormality signal to the controller. The controller controls the auxiliary power supply 220 to be electrically connected to the drive motor 141 according to the received abnormality signal.

[0373] It should be noted that the trigger module settings can better switch the connection status between the main power supply 210 and the drive motor 141, and between the auxiliary power supply 220 and the drive motor 141, so that the push rod 152 can be reset, thereby allowing the door 120 to close and the refrigerator 100 to be used normally, thus improving the user experience.

[0374] The refrigerator provided in this application embodiment includes: a cabinet; a door slidably connected to the cabinet; and an automatic switching unit, which includes: a drive mechanism, the drive mechanism including a drive motor configured to provide driving force; an actuator connected to the drive motor; and a control circuit unit electrically connected to the drive motor, the control circuit unit including a main power supply and an auxiliary power supply, one of which is electrically connected to the drive motor; when the main power supply is electrically connected to the drive motor, the drive motor rotates in a first direction, causing the actuator to move away from the cabinet under the action of the driving force; when the actuator is in a third state, when the auxiliary power supply is electrically connected to the drive motor, the drive motor rotates in a second direction, causing the actuator to move closer to the cabinet under the action of the driving force; wherein the first direction and the second direction are opposite.

[0375] By controlling the circuit unit, when the push rod fails to reset, the drive motor can be reversed to reset the push rod so that the door can close, thus ensuring the refrigerator can operate normally and improving the refrigerator's functional reliability.

[0376] The above are all refrigerators with partially automatic door opening and closing mechanisms. Generally, users choose fully automatic door opening and closing refrigerators for a better quality of life. To prevent the refrigerator from hitting obstacles or people during the opening and closing process, photoelectric switches are installed on the refrigerator door. These photoelectric switches detect obstacles or people in front of the refrigerator and feed the detected signals back to the automatic opening and closing unit, thereby controlling the door to open or close. However, the sensing range of a single photoelectric switch is limited. Theoretically, multiple photoelectric switches need to be installed on the door to meet the requirements for wide-range detection, resulting in higher manufacturing costs and greater manufacturing difficulty. In addition, there are sensing blind spots between two photoelectric switches, leading to lower detection accuracy of the door photoelectric switch. Automatic door opening can easily result in the door hitting obstacles or people, causing damage to the refrigerator or injury to the user.

[0377] To address the aforementioned problems, in some other possible implementations of the embodiments of this application, such as... Figure 26 and Figure 27 As shown, the door 120 can be a second door 122, which can be slidably connected to the cabinet 110 along the depth direction of the cabinet 110. This is the pulling direction of the second door 122; it can be pulled or pushed to allow the second door 122 to slide relative to the cabinet 110, thereby opening or closing the refrigeration compartment.

[0378] It should be noted that, Figure 27 The horizontal direction X shown represents the pull-out direction of the second door 122 and the depth direction of the box 110.

[0379] Specifically, the second door 122 and the anti-collision unit 130 are both designed to be pulled out relative to the box 110.

[0380] like Figure 27 , Figure 28 as well as Figure 29 As shown, in some embodiments, the second door 122 can be slidably connected to the housing 110 via a guide rail pair 1221. The guide rail pair 1221 includes a fixed guide rail 12211 and a sliding guide rail 12212. The fixed guide rail 12211 can be fixedly connected to the upper part of the refrigeration compartment. The sliding guide rail 12212 can be slidably connected to the fixed guide rail 12211. The second door 122 can be connected to the end of the sliding guide rail 12212 away from the rear side wall of the refrigeration compartment. When a pulling or pushing force is applied to the second door 122, the second door 122 can drive the sliding guide rail 12212 to slide relative to the fixed guide rail 12211, thereby opening or closing the refrigeration compartment.

[0381] For example, there can be two guide rail pairs 1221, and the two guide rail pairs 1221 can be symmetrically arranged along the center plane of the height direction Z in the housing 110. The fixed guide rails 12211 of the two guide rail pairs 1221 are respectively fixedly connected to the two end side walls opposite to the refrigeration compartment, and the ends of the sliding guide rails 12212 of the two guide rail pairs 1221 facing away from the rear side wall of the refrigeration compartment are both fixedly connected to the second door 122.

[0382] The following explanation uses the second door body 122 as an example:

[0383] [Clutch mechanism 170]

[0384] like Figure 29 , Figure 30 as well as Figure 31 As shown, the automatic switching unit may further include a clutch mechanism 170, which may be disposed between the drive mechanism 140 and the actuator 150 for connecting or disconnecting the drive mechanism 140 and the actuator 150. The clutch mechanism 170 may also be configured to arbitrarily control the timing of connecting or disconnecting the drive mechanism 140 and the actuator 150 to increase the functionality of the automatic switching unit and improve the user experience.

[0385] It is understood that by setting the clutch mechanism 170, the automatic switching unit can also achieve other functions, which will not be described in detail in this application embodiment.

[0386] In some embodiments, continue to refer to Figures 29 to 31The clutch mechanism 170 includes a clutch motor 171, a second worm 172, a second worm wheel 173, a first clutch gear 174, a second clutch gear 175, a third clutch gear 176, and a clutch rack 177. The second worm wheel 173 meshes with the second worm 172. When the output shaft of the clutch motor 171 rotates, it drives the second worm 172 to rotate. The second worm 172 drives the second worm wheel 173 to rotate. The second worm wheel 173 drives the clutch rack 177 to move. The clutch rack 177 drives the third clutch gear 176 to rotate, thereby causing the first protrusion of the sliding key on the second clutch gear 175 to disengage or engage with the keyway of the first clutch gear 174, and the clutch enters a disengaged state or an engaged state.

[0387] The actuator 150 may include an actuating rack 151. When the clutch mechanism 170 is engaged, it drives the drive mechanism 140 and the actuator 150. The drive mechanism 140 can transmit driving force to the actuator 150 through the clutch mechanism 170, allowing the actuating rack 151 to move the door 120 away from or towards the housing 110, thereby automatically opening or closing the door 120. When the clutch mechanism 170 is disengaged, it disconnects the drive mechanism 140 and the actuator 150. The user can manually open or close the door 120, and the force applied by the user to open or close the door 120 is not transmitted to the drive mechanism 140. This configuration allows the automatic opening and closing unit to be compatible with both automatic and manual door opening and closing functions, increasing the functionality of the automatic opening and closing unit and improving the user experience.

[0388] [Collision avoidance unit 130]

[0389] It should be noted that the anti-collision unit 130 enables the anti-collision component 131 to stop moving immediately when it hits a user during its movement. Even if an infant or pet stays in front of the refrigerator 100, the protection of the anti-collision unit 130 will be triggered. The sensing coverage is wide, there are no blind spots, the protection effect is better, and the cost is lower.

[0390] It should be noted that the micro switch 132 refers to a contact mechanism with a small contact interval and a quick-acting mechanism, which performs switching action with a specified stroke and a specified force, and has an external trigger point.

[0391] like Figures 32 to 41 As shown, in some embodiments, the micro switch 132 is detachably installed on the door body 120, for example, by means of bolts, clips or other structures, to facilitate subsequent disassembly and maintenance.

[0392] When the automatic switch unit is in the activated state, that is, the clutch mechanism 170 is in the engaged state, the door 120 is in the open state under its action. Since the anti-collision member 131 is movably installed at the bottom end of the door 120, initially, as Figure 35 and Figure 37 As shown, both the door 120 and the anti-collision member 131 move towards the depth of the housing 110 and are designed to slide. When the anti-collision member 131 touches an obstacle, it stops moving. At this point, the obstacle prevents the anti-collision member 131 from moving, which is the first level of anti-collision protection. Figure 36 As shown. Then as... Figure 38 As shown, the door 120 continues to move forward, and the anti-collision component 131 moves in the opposite direction to the door 120. The micro switch 132 is triggered, releasing a stop signal, and the actuator 150 stops, that is, the door 120 stops, which is the second level of anti-collision protection.

[0393] like Figure 33 and Figure 34 As shown, it should also be noted that the obstacle is generally the user's foot. That is to say, when the anti-collision component 131 touches the user's foot, it will stop moving forward. Since it only needs to overcome the spring force, the torque required to stop the forward movement is also small, and it will not cause injury to the user's body.

[0394] like Figure 40 and Figure 41 As shown, in some optional embodiments, the anti-collision unit 130 further includes a sliding assembly 133, which includes a slider 1331 and a sliding groove 1332. The slider 1331 extends along the moving direction of the anti-collision member 131, and the sliding groove 1332 extends along the sliding direction of the door body 120. The moving direction of the anti-collision member 131 and the sliding direction of the door body 120 are consistent.

[0395] The sliding groove 1332 and the sliding member 1331 are respectively provided on the door body 120 and the anti-collision member 131. The shape of the sliding member 1331 is adapted to the sliding groove 1332. The sliding member 1331 is inserted into the sliding groove 1332 and moves within the sliding groove 1332.

[0396] For example, the sliding groove 1332 can be provided on the door body 120, and the sliding member 1331 can be provided on the anti-collision member 131; of course, the sliding groove 1332 can be provided on the anti-collision member 131, and the sliding member 1331 can be provided on the door body 120.

[0397] It should be noted that the sliding component 133 provides guidance for the movement between the sliding member 1331 and the door 120. In addition, the sliding member 1331 and the door 120 can be connected by the structural matching of the sliding member 1331 and the sliding groove 1332.

[0398] In some embodiments, the slider 1331 can be fixedly or detachably mounted on the anti-collision member 131, facing the sliding groove 1332, engaging in the sliding groove 1332, and moving along the sliding groove 1332.

[0399] For example, when the automatic switch unit is in the start state, that is, the clutch mechanism 170 is in the engaged state, the door 120 is in the open state under its action. Since the anti-collision member 131 is movably installed at the bottom end of the door 120, initially, both the anti-collision member 130 and the door 120 move towards the depth direction of the housing 110. When the anti-collision member 131 touches the obstacle, it stops moving. At this time, the obstacle prevents the anti-collision member 131 from moving. The door 120 continues to move forward, and the slider 1331 moves in the sliding groove 1332, so that the anti-collision member 131 moves in the opposite direction to the door 120. The micro switch 132 is triggered, releasing the stop signal, and then the actuator 150 stops, that is, the door 120 stops.

[0400] like Figure 38 and Figure 40 As shown, in some optional embodiments, the slider 1331 is a sliding block;

[0401] When the slider 1331 is installed on the anti-collision member 131, the slider 1331 is located on the side wall of the anti-collision member 131 and protrudes from the side wall of the anti-collision member 131. The groove of the sliding groove 1332 faces the slider 1331 and is located on the bottom wall of the door body 120.

[0402] It should be noted that this design allows the sliding part 1331 to fit better against the bottom of the door 120, thus enhancing the aesthetic appeal of the refrigerator 100.

[0403] In some embodiments, the slider 1331 and the anti-collision member 131 are connected by an integral connection. In other embodiments, the slider 1331 and the anti-collision member 131 can also be connected by other connection methods. As long as the connection method can fix the slider 1331 and the anti-collision member 131, the purpose of this embodiment can be achieved. Here, the connection method of the slider 1331 and the anti-collision member 131 is not limited.

[0404] In some alternative implementations, such as Figure 38 , Figure 40 as well as Figure 41As shown, the slider 1331 includes a first sliding part 13311 and a second sliding part 13312. The first sliding part 13311 is connected to the end of the anti-collision member 131, one end of the second sliding part 13312 is connected to the first sliding part 13311, and the free end of the second sliding part 13312 extends away from the end of the anti-collision member 131.

[0405] Wherein, the cross-sectional area of ​​the first sliding part is smaller than the cross-sectional area of ​​the second sliding part, and the cross-section is a cross-section perpendicular to the direction from the first sliding part to the second sliding part. That is to say, along the length direction of the anti-collision member 131, the extension length of the second sliding part 13312 is greater than the extension length of the first sliding part 13311, and along the length direction of the door body 120, the extension length of the bottom of the sliding groove 1332 is greater than the extension length of the opening of the sliding groove 1332.

[0406] It should be noted that the length direction of the anti-collision component 131 is consistent with the length direction of the door body 120 for ease of understanding, such as... Figure 40 and Figure 41 As shown, Y represents the length direction of the anti-collision component 131 and the length direction of the door body 120.

[0407] Along the length of the anti-collision member 131, the extension length of the second sliding part 13312 is greater than the extension length of the first sliding part 13311, so that when it moves with the sliding groove 1332, the connection between the anti-collision member 131 and the door body 120 can be satisfied through the sliding part 1331 and the sliding groove 1332.

[0408] In other words, the sliding component 133 can be a dovetail-shaped guide structure. For example, the slider 1331 can be a dovetail tenon, and the sliding groove 1332 can be a dovetail groove, which has a better guiding effect and stability.

[0409] In other embodiments, the slider 1331 can be a slider, the sliding groove 1332 can be a slide rail, the slider can move along the length of the slide rail, etc. The dovetail guide structure adopted in this embodiment is simpler and has a lower cost.

[0410] In some alternative implementations, refer to Figures 37 to 41 The anti-collision unit 130 also includes a movable member 134 and a first elastic member 135. The movable member 134 is disposed at the bottom end of the door body 120. The moving direction of the movable member 134 is consistent with the sliding direction of the door body 120. The first elastic member 135 is located between the inner wall of the movable member 134 and the inner wall of the anti-collision member 131.

[0411] When the anti-collision member 131 moves to the location of the obstruction, the anti-collision member 131 stops moving, and the moving member 134 moves relative to the anti-collision member 131 under the action of the door body 120, so that the first elastic member 135 is in a compressed state.

[0412] It should be noted that the movable component 134 can be fixedly installed at the bottom end of the door body 120, wherein the moving direction of the movable component 134 is consistent with the sliding direction of the door body 120. Figure 37 X in the text.

[0413] When the automatic switch unit is activated, i.e., the clutch mechanism 170 is engaged, the door 120 opens under its action. Correspondingly, as the door 120 moves, the anti-collision member 131 also opens relative to the cabinet 110. At this time, the anti-collision member 131 and the door 120 can be considered to be in a relatively stationary state. Its first elastic member 135 is located between the inner wall of the moving member 134 and the inner wall of the anti-collision member 131 in its natural state. When a user or pet appears in front of the refrigerator 100, the anti-collision member 131 will encounter an obstacle and stop moving forward. The forward movement is the anti-collision member 131 moving away from the cabinet 110. The door 120 moves forward under the push of the actuator 150, and the anti-collision member 131 and the door 120 are relatively displaced. That is, the anti-collision member 131 moves backward relative to the door 120, and the distance between the inner wall of the moving member 134 and the inner wall of the anti-collision member 131 gradually decreases. As a result, the first elastic member 135 changes from its initial natural state to a compressed state. The micro switch 132 is triggered, the door 120 stops moving, and when the obstacle leaves, the elastic force of the first elastic member 135 can reset the anti-collision member 131.

[0414] like Figure 38 and Figure 39 As shown, in some alternative embodiments, the movable part 134 is a bent part;

[0415] The movable member 134 has a cavity with a connecting hole 1341, which connects the movable member 134 and the anti-collision member 131, so that the first elastic member 135 passes through the connecting hole 1341 in its natural state and is connected between the inner wall of the movable member 134 and the inner wall of the anti-collision member 131.

[0416] In some embodiments, the movable member 134 is a plate-shaped member, which is bent to form a bent member. It has notches in the height direction of the housing 110, and the connecting hole 1341 faces the inner wall of the anti-collision member 131 so that the first elastic member 135 is connected between the inner wall of the movable member 134 and the inner wall of the anti-collision member 131 in its natural state.

[0417] For example, the movable member 134 has two sidewalls that are arranged opposite each other in the length direction of the anti-collision member 131. This arrangement is to improve the overall strength of the movable member 134. In other words, the movable member 134 is designed as a bent structure, which can better enhance the overall strength of the movable member 134.

[0418] In some alternative implementations, such as Figures 37 to 41 As shown, the anti-collision unit 130 also includes a guide post 136, which is disposed inside the moving member 134 and extends along the sliding direction of the door body 120. The first elastic member 135 is a spring and is sleeved on the outer periphery of the guide post 136.

[0419] The guide post 136 is a cylindrical part, and the first elastic element 135 is compressed along the axial direction of the guide post 136.

[0420] It should be noted that the guide post 136 is designed to guide the first elastic element 135 from its natural state to its compressed state, or from its compressed state to its natural state, so as to prevent the first elastic element 135 from deviating during movement.

[0421] In some embodiments, the guide post 136 is fixedly installed on the side wall of the movable member 134 and extends along the sliding direction of the door body 120. The guide post 136 may extend to the plane where the connecting hole 1341 is located, or it may not extend to the plane where the connecting hole 1341 is located, that is, it may not extend to the end face of the side wall provided in the length direction of the anti-collision member 131.

[0422] like Figures 37 to 41 As shown, in some optional embodiments, the anti-collision member 131 includes a first anti-collision member 1311 and a second anti-collision member 1312 connected together, and both the first anti-collision member 1311 and the second anti-collision member 1312 are frame members;

[0423] The movable component 134, the first elastic component 135, and the micro switch 132 are all located inside the cavity. The first anti-collision component 1311 has an opening, and the second anti-collision component 1312 covers the opening. The first anti-collision component 1311, the second anti-collision component 1312, and the door 120 form a cavity.

[0424] It should be noted that the first anti-collision member 1311 and the second anti-collision member 1312 are detachable, facilitating the disassembly and maintenance of the movable member 134, the first elastic member 135, and the micro switch 132 within their cavities. The first anti-collision member 1311 has at least two openings with different structures; one opening faces the second anti-collision member 1312, and the other faces the door body 120. This design reduces the volume of the anti-collision member 131 while increasing the cavity's accommodating space, and also reduces the weight of the anti-collision member 131, allowing it to impede movement with a smaller torque.

[0425] like Figures 37 to 41As shown, in some optional embodiments, there are multiple sliding members 1331 and multiple sliding grooves 1332. Multiple sliding members 1331 are spaced apart along the length direction of the anti-collision member 131, and multiple sliding grooves 1332 are along the length direction of the door body 120.

[0426] There is at least one micro switch 132, and at least one micro switch 132 is spaced apart along the length of the door body 120.

[0427] It should be noted that there are multiple sliding members 1331 and sliding grooves 1332, and correspondingly, there are also multiple moving members 134 and first elastic members 135.

[0428] Specifically, the number of sliding members 1331, sliding grooves 1332, moving members 134 and first elastic members 135 are matched and arranged in a mutually matching manner, and are spaced apart along the length direction of the door body 120 to improve structural stability. Considering that the more the number, the greater the friction, in this embodiment, the width of the door body 120 is 860mm, and the number of sliding members 1331 and sliding grooves 1332 can be selected as 3 to 5 sets.

[0429] The refrigerator provided in this application includes: a cabinet; a door slidably connected to the cabinet; an automatic switch unit, part of which is disposed on the cabinet and the other part on the door, to allow the door to move away from or closer to the cabinet; and an anti-collision unit disposed at the bottom of the door, the anti-collision unit including an anti-collision member and a micro switch, the micro switch and the automatic switch unit being electrically connected; wherein, when the automatic switch unit is in the activated state, the anti-collision member and the door move synchronously relative to the cabinet to open the door; when the anti-collision member moves to the location of an obstruction, the anti-collision member stops moving, and the door moves relative to the anti-collision member to trigger the micro switch, causing the door to stop moving.

[0430] By incorporating an anti-collision unit, the anti-collision component can immediately stop moving when it encounters a user during its movement. This serves as the first level of anti-collision protection. The torque required to prevent the anti-collision component from moving forward is relatively small, and it will not cause harm to the user. Then, a stop signal is released via a microswitch, and the actuator drives the door to stop, thereby preventing the door from opening and colliding with the user. This method is low-cost, and touching any part of the anti-collision component will cause it to slide backward relative to the door. Even if an infant or pet is standing in front of the refrigerator, the anti-collision unit's protection will be triggered. The sensing coverage is wide, with no blind spots, resulting in better protection at a lower cost.

[0431] In the automatic switching unit, when the clutch is in a switching state, the clutch gear rotates relative to the sliding key. As the clutch rotates, the clutch gear also rotates synchronously. Considering that automatic opening and closing of the door is allowed regardless of its state, the initial contact point between the incomplete gear and the clutch gear is not fixed. Therefore, when the tooth tip of the incomplete gear contacts the tooth tip of the clutch gear, the two gears are in a "jammed" state, preventing them from meshing.

[0432] To solve the above problems, such as Figures 42 to 49 As shown, the second type of clutch mechanism is used as an example for explanation: the clutch mechanism 170 includes a first clutch gear 174, a second clutch gear 175 and a third clutch gear 176 that are coaxially arranged and relatively rotatable. One of the first clutch gear 174 and the second clutch gear 175 is connected to the drive mechanism 140 for transmission, and the other is connected to the execution mechanism 150 for transmission.

[0433] like Figure 45 As shown, the sliding key 178 has a first protrusion, which is used to engage or disengage with the internal teeth of the first clutch gear 174 to switch the clutch mechanism 170 to the engaged or disengaged state.

[0434] The clutch motor 171 and the clutch drive gear 179 are connected to the output shaft of the clutch motor 171. At least part of the clutch drive gear 179 has a deformable part 17911. When the tooth tip of the clutch drive gear 179 contacts the tooth tip of the third clutch gear 176, the deformable part 17911 moves in a direction away from the tooth tip of the third clutch gear 176 under the pressure of the tooth tip of the third clutch gear 176, so that the clutch drive gear 179 meshes with the third clutch gear 176.

[0435] In some embodiments, such as Figure 42 , Figure 43 as well as Figure 44 As shown, the clutch mechanism 170 includes a clutch motor 171, a clutch assembly, and a clutch drive gear 179. The clutch assembly is used to provide clutch force and is disposed between the drive mechanism 140 and the actuator 150. The clutch assembly is configured to connect or disconnect the drive mechanism 140 and the actuator 150 under the action of the clutch force.

[0436] The clutch drive gear 179 can drive the clutch assembly, causing the drive mechanism 140 to connect or disconnect from the actuator 150. Therefore, the timing of the clutch drive gear 179 being in the engaged or disengaged state can be controlled, providing users with both automatic and manual door opening and closing modes, thus enhancing the user experience.

[0437] For example, refer to Figure 42 and Figure 43The clutch assembly may include a first clutch gear 174, a second clutch gear 175, and a third clutch gear 176 that are coaxially arranged and relatively rotatable. One of the first clutch gear 174 and the second clutch gear 175 may be connected to the drive mechanism 140, and the other may be connected to the second actuator 150.

[0438] For example, the first clutch gear 174 can be driven by the drive mechanism 140, and the second clutch gear 175 can be driven by the actuator 150. Alternatively, the first clutch gear 174 can be driven by the actuator 150, and the second clutch gear 175 can be driven by the drive mechanism 140.

[0439] like Figure 45 As shown, the clutch assembly may further include a sliding key 178, which can be slidably connected to the second clutch gear 175 along the radial direction of the second clutch gear 175. The sliding key 178 has a first protrusion and a second protrusion. The clutch drive gear 179 has an irregular sliding track. When the second protrusion is in the first position of the sliding track, the first protrusion disengages from the internal teeth of the first clutch gear 174, and the clutch mechanism 170 is in a disengaged state. When the clutch drive gear 179 rotates, the sliding key 178, under the action of the spring, causes the second protrusion to be in the second position of the sliding track. At this time, the first protrusion engages with the internal teeth of the first clutch gear 174, and the clutch mechanism 170 is in a closed state.

[0440] When the output shaft of the clutch motor 171 rotates, it drives the clutch drive gear 179 to rotate. The clutch drive gear 179 drives the third clutch gear 176 to rotate, thereby causing the first protrusion of the sliding key 178 provided on the second clutch gear 175 to disengage or engage with the keyway of the first clutch gear 174, and the clutch mechanism 170 enters the disengaged state or the engaged state.

[0441] When the clutch assembly is engaged, the clutch drive gear 179 drives the third clutch gear 176 to rotate, which in turn causes the sliding key 178 to slide relative to the second clutch gear 175. This allows the first protrusion of the sliding key 178 to mesh with the internal teeth of the first clutch gear 174, connecting the first clutch gear 174 and the second clutch gear 175 via the sliding key 178. This enables the first clutch gear 174 and the second clutch gear 175 to rotate synchronously. The drive mechanism 140 transmits driving force to the actuator 150 via the synchronously rotating first clutch gear 174 and second clutch gear 175, causing the actuator 150 to actuate and automatically open or close the door 120.

[0442] When the clutch assembly is disengaged, the clutch drive gear 179 can drive the sliding key 178 to slide relative to the second clutch gear 175 to a first position, so that the first protrusion of the sliding key 178 disengages from the internal teeth of the first clutch gear 174, thereby separating the first clutch gear 174 and the second clutch gear 175, allowing the first clutch gear 174 and the second clutch gear 175 to rotate relative to each other. The driving force provided by the drive mechanism 140 is not transmitted to the actuator 150, and the reverse load on the actuator 150 is not transmitted to the drive mechanism 140, allowing the user to manually open or close the door 120.

[0443] For example, the clutch assembly can be disposed between two first transmission gears 161 that are parallel and adjacent to each other in the transmission gear system 160. The first clutch gear 174 can mesh with one of the first transmission gears 161, and the second clutch gear 175 in the clutch assembly can mesh with the other first transmission gear 161.

[0444] It is understood that the clutch assembly can also be disposed between the transmission gear system 160 and the drive mechanism 140, with one of the first clutch gear 174 and the second clutch gear 175 meshing with the transmission gear system 160 and the other being connected to the drive mechanism 140. Alternatively, the clutch assembly can be disposed between the transmission gear system 160 and the actuator 150, with one of the first clutch gear 174 and the second clutch gear 175 meshing with the transmission gear system 160 and the other being connected to the actuator 150.

[0445] The clutch motor 171 and the clutch drive gear 179 are connected to the output shaft of the clutch motor 171. At least part of the clutch drive gear 179 has a deformable part 17911. When the tooth tip of the clutch drive gear 179 contacts the tooth tip of the third clutch gear 176, the deformable part 17911 moves in a direction away from the tooth tip of the third clutch gear 176 under the pressure of the tooth tip of the third clutch gear 176, so that the clutch drive gear 179 meshes with the third clutch gear 176.

[0446] It should be noted that when the clutch mechanism 170 switches states, the third clutch gear 176 rotates relative to the sliding key 178. In other operating conditions, it is necessary to ensure that the relative position of the third clutch gear 176 and the sliding key 178 remains unchanged. Therefore, when the clutch mechanism 170 rotates, the third clutch gear 176 will also rotate synchronously. Regardless of the state of the door 120, this embodiment allows automatic opening and closing of the door. Therefore, the initial contact point between the clutch drive gear 179 and the third clutch gear 176 is not fixed. That is to say, the clutch drive gear 179 and the third clutch gear 176 will not always maintain a meshed state.

[0447] When the clutch motor 171 is working, it drives the clutch drive gear 179 to rotate. If the tooth tip of the clutch drive gear 179 is in contact with the tooth tip of the third clutch gear 176, it means that the two will be stuck. Therefore, the deformation part 17911 can move away from the tooth tip of the third clutch gear 176 under the pressure of the tooth tip, so as to solve the stuck state. After the deformation part 17911 deforms, it continues to rotate at a certain angle. After leaving the dead point, the deformation part 17911 rebounds and enters the tooth groove of the third clutch gear 176 to restore normal meshing transmission.

[0448] For example, 42 to Figure 49 As shown, in some alternative embodiments, the clutch drive gear 179 is an incomplete gear;

[0449] Along the rotation direction of the clutch drive gear 179, the portion of the clutch drive gear 179 near the third clutch gear 176 has a deformable portion 17911.

[0450] It should be noted that, considering the strength of the clutch drive gear 179, the deformation part 17911 is set to solve the jamming problem. Therefore, the deformation part 17911 is set on the clutch drive gear 179 near the third clutch gear 176.

[0451] For example, such as Figure 48 As shown, the clutch drive gear 179 rotates counterclockwise under the drive of the clutch motor 171. At this time, the deformation part 17911 is provided on the part of the clutch drive gear 179 that is about to mesh or contact with the third clutch gear 176. That is to say, the deformation part 17911 is not provided on all of the clutch drive gear 179.

[0452] Generally, to ensure a good user experience, the response time of the actuator 150 should be as short as possible. This response time mainly consists of two parts: the signal transmission time and the time required for the clutch mechanism 170 to switch from disengagement to closure. Due to structural layout limitations, the signal transmission time is generally a fixed value, while the state switching time of the clutch mechanism 170 can be shortened by increasing the speed of the clutch motor 171. In the embodiments of this application, the state switching time of the clutch mechanism 170 is required to be less than 0.1 seconds. During the state switching process, the effective rotation angle of the clutch drive gear 179 is 120°. Therefore, the speed of the clutch drive gear 179 is not less than (120 / 360) / 0.1≈3.3 Rps.

[0453] In this embodiment, the clutch drive gear 179 has 40 teeth. At the aforementioned rotational speed, the time required for the second tooth to reach the first tooth is only 1 / 3.3 / 40 ≈ 0.0076 seconds.

[0454] If only the first tooth can generate radial displacement, it will do so through deformation, while the other teeth will not. In this embodiment, due to the excessively high gear speed, the deformation of the first tooth cannot be released in time. Before the first tooth returns to its initial position, the second tooth has already reached the original position of the first tooth, and is still stuck. Therefore, to avoid this situation, a deformation portion 17911 can be provided on a portion of the clutch drive gear 179 near the third clutch gear 176. This means that the deformation portion 17911 is not a structure possessed by any single tooth of the clutch drive gear 179.

[0455] like Figures 42 to 49 As shown, in some optional embodiments, the deformable part 17911 is a flexible part, and the deformable part 17911 deforms along the direction away from the tooth tip of the third clutch gear 176 under the pressure of the tooth tip of the third clutch gear 176.

[0456] It should be noted that the deformation part 17911 is made of flexible material, which can deform under the pressure of the tooth tip of the third clutch gear 176 to solve the jamming problem.

[0457] In some embodiments, the deformable part 17911 can be a soft plastic part, for example, it can be made of materials with elastic deformation capabilities such as silicone, polypropylene (PP), and ethylene-vinyl acetate copolymer (EVA). In practical applications, other structures of the clutch drive gear 179 are usually made of metal to enhance the strength and rigidity of meshing transmission. For example, these other structures can be made of lightweight and high-rigidity metal materials such as aluminum, magnesium, and titanium.

[0458] In some alternative embodiments, the deformable part 17911 is an elastic element that moves in a direction away from the tooth tip of the third clutch gear 176 under the pressure of the tooth tip of the third clutch gear 176.

[0459] Under the pressure of the tooth tip of the third clutch gear 176, the deformable part 17911 can move in a direction away from the tooth tip of the third clutch gear 176 to resolve the jamming state. After the deformable part 17911 deforms, it continues to rotate at a certain angle. After leaving the dead point, the deformable part 17911 springs back into the tooth groove of the third clutch gear 176 to restore normal meshing transmission.

[0460] Continue to refer to Figures 42 to 49In some alternative embodiments, the clutch drive gear 179 has a plurality of first transmission teeth 1791, which are spaced apart in the circumferential direction of a portion of the clutch drive gear 179, and the deformable portion 17911 is located at the tooth tip of at least a portion of the first transmission teeth 1791.

[0461] In some embodiments, the first transmission tooth 1791 may include a tooth tip, a tooth middle, and a tooth bottom. The materials of the tooth tip, tooth middle, and tooth bottom may all be flexible, meaning that the entire first transmission tooth 1791 is a flexible material. Under the compression of the tooth tip of the third clutch gear 176, the entire first transmission tooth 1791 will deform to avoid jamming.

[0462] In other embodiments, the tooth tip, i.e. the deformable part 17911, is a flexible part, while the tooth middle and tooth bottom are metal parts. This means that under the pressure of the tooth tip of the third clutch gear 176, the deformable part 17911 deforms to avoid jamming.

[0463] like Figures 42 to 48 As shown, in some optional embodiments, the clutch drive gear 179 further includes a second elastic element 1792, which is connected to the first transmission gear 1791.

[0464] The third clutch gear 176 has a plurality of second transmission teeth 1761, which are spaced apart in the circumferential direction of the third clutch gear 176. When the tooth tip of the first transmission tooth 1791 contacts the tooth tip of the second transmission tooth 1761, the second elastic member 1792 is located between the first transmission tooth 1791 and the side wall of the clutch drive gear 179 in a compressed state.

[0465] It should be noted that the second elastic element 1792 can provide elastic force when the first transmission tooth 1791 moves under compressed conditions, so that the first transmission tooth 1791 can quickly disengage from the jammed state with the second transmission tooth 1761.

[0466] In some embodiments, the first transmission tooth 1791 is a metal part, which means that the deformable part 17911 is also a metal part. When the tooth tip of the clutch drive gear 179 and the tooth tip of the third clutch gear 176 are stuck, the first transmission tooth 1791 of the metal part can move along the direction away from the tooth tip of the third clutch gear 176 under the action of the second elastic member 1792 to resolve the stuck state.

[0467] In other embodiments, the deformable portion 17911 in the first transmission gear 1791 is a flexible element. With the addition of the second elastic element 1792, both the deformable portion 17911 and the second elastic element 1792 can deform under a certain pressure. Therefore, the combination of the two improves the efficiency of solving the jamming problem. This means that when the tooth tip of the clutch drive gear 179 and the tooth tip of the third clutch gear 176 are jammed, the deformation of the deformable portion 17911 itself can be achieved, and the second elastic element 1792 can also cause it to move and deform in a direction away from the tooth tip of the third clutch gear 176.

[0468] The second elastic element 1792 is detachably connected to the first transmission gear 1791. It should be noted that by making the second elastic element 1792 and the first transmission gear 1791 detachably connected, the installation and removal of the second elastic element 1792 can be achieved, facilitating its use and maintenance.

[0469] In some alternative embodiments, a movable groove is formed on the clutch drive gear 179, the movable groove is arranged to extend radially along the clutch drive gear 179, and the groove opening faces the second transmission tooth 1761.

[0470] When the tip of the first transmission tooth 1791 contacts the tip of the second transmission tooth 1761, the deformable part 17911 and the second elastic member 1792 move in the moving groove toward the direction away from the tip of the second transmission tooth 1761.

[0471] It should be noted that the movable groove provides space for the installation of the deformable part 17911 and the second elastic member 1792. On the other hand, under the pressure of the tooth tip of the second transmission tooth 1761, the deformable part 17911 can move in the movable groove in a direction away from the tooth tip of the second transmission tooth 1761. Alternatively, when disengaged from the jammed state, the deformable part 17911 can be engaged in the tooth groove of the second transmission tooth 1761 under the elastic force of the second elastic member 1792, so that the clutch drive gear 179 and the third clutch gear 176 mesh.

[0472] In some embodiments, the second elastic element 1792 may be a compression spring.

[0473] like Figure 48 As shown, in some optional embodiments, the clutch drive gear 179 further includes a rotating member 1793 and a transmission member 1794. The transmission member 1794 is an arc-shaped member and is located on the periphery of the rotating member 1793. A plurality of first transmission teeth 1791 are spaced apart on the transmission member 1794 along the extending direction of the transmission member 1794.

[0474] like Figure 46 and Figure 47As shown, the clutch drive gear 179 also has a notch 1796, which is connected to the outer side of the rotating member 1793. The notch 1796 is located between the transmission member 1794 and the rotating member 1793, so that part of the transmission member 1794 is suspended above the rotating member 1793.

[0475] It should be noted that the notch 1796 allows the first transmission tooth 1791 on the transmission component 1794 to move toward the center of the rotating component 1793 under the pressure of the second transmission tooth 1761 on the third clutch gear 176, at which point the width of the notch 1796 becomes narrower.

[0476] When the clutch motor 171 operates, it drives the clutch drive gear 179 to rotate. If the tooth tip of the clutch drive gear 179 is in contact with the tooth tip of the third clutch gear 176, it means that the two will be in a jammed state. At this time, the first transmission gear 1791 moves towards the rotating part 1793 under the compression of the second transmission gear 1761, thereby narrowing the width of the notch 1796. By simply adding the notch 1796, the first transmission gear 1791 can have movable space, resulting in a compact structure.

[0477] In some alternative embodiments, the clutch drive gear 179 further includes a connector 1795 for connecting the transmission member 1794 and the rotating member 1793, and is located in the middle of the transmission member 1794.

[0478] There are at least two notches 1796, and at least two notches 1796 are located on opposite sides of the connector 1795 in the rotation direction of the rotating member 1793.

[0479] It should be noted that one end of the connector 1795 is connected to the middle of the transmission component 1794, and the other end is connected to the rotating component 1793. When the rotating component 1793 rotates under the drive of the clutch motor 171, it drives the connector 1795 and the transmission component 1794 to rotate synchronously.

[0480] Specifically, the notch 1796 is an arc-shaped structure that matches the structure of the transmission component 1794, which can improve the overall aesthetics.

[0481] like Figure 49 As shown, in some optional embodiments, the thickness of the first transmission tooth 1791 along the radial direction of the rotating member 1793 is between 1 mm and 4 mm; and / or,

[0482] Along the radial direction of the rotating component 1793, the thickness of the transmission component 1794 is between 1 mm and 1.5 mm.

[0483] It should be noted that, to mitigate this risk, as much of the first transmission teeth 1791 as possible should be allowed to deform, provided the structure permits. Using a cantilever structure is the simplest and lowest-cost solution. In this embodiment, four first transmission teeth 1791 are allowed to undergo elastic deformation.

[0484] In addition, such as Figure 49 As shown, H1 represents the thickness of the first transmission tooth 1791, and H2 represents the thickness of the transmission component 1794.

[0485] To achieve the above design objectives, the cantilever structure needs to have the greatest possible elasticity while ensuring structural strength. The preferred materials for the clutch drive gear 179 are POM, PA6, and PA66.

[0486] When the thickness H1 of the first transmission gear 1791 is 3mm, the thickness H2 of its transmission component 1794 can be between 1mm and 1.5mm. If this dimension is too small, the structural strength will be poor, and breakage may occur; if this dimension is too large, it will be difficult to deform, and a higher power clutch motor 171 needs to be selected to overcome the spring force. In the embodiments of this application, the clutch drive gear 179 is made of POM and has a root width of 1.3mm.

[0487] The refrigerator provided in this application embodiment includes a cabinet; a door slidably connected to the cabinet; an automatic switch unit, which includes: a drive mechanism configured to provide a driving force; an actuator configured to move away from or towards the cabinet under the action of the driving force; a clutch mechanism, which includes: a first clutch gear, a second clutch gear, and a third clutch gear coaxially arranged and rotatable relative to each other, one of the first clutch gear and the second clutch gear being drive-connected to the drive mechanism, and the other being drive-connected to the actuator; and a sliding key for sliding... The key has a first protrusion for engaging or disengaging with the internal teeth of the first clutch gear to switch the clutch mechanism to an engaged or disengaged state; a clutch motor and a clutch drive gear are connected to the output shaft of the clutch motor; at least part of the clutch drive gear has a deformable portion; when the tooth tip of the clutch drive gear contacts the tooth tip of the third clutch gear, the deformable portion moves in a direction away from the tooth tip of the third clutch gear under the pressure of the tooth tip of the third clutch gear, so that the clutch drive gear engages with the third clutch gear.

[0488] By incorporating the deformation section, when the tooth tip of the clutch drive gear comes into contact with the tooth tip of the third clutch gear, indicating a potential jam, the deformation section moves under pressure to resolve this jam. After moving, the deformation section continues to rotate at a certain angle, disengaging from the dead point. Then, it springs back into the tooth groove of the third clutch gear, allowing the clutch drive gear and the third clutch gear to mesh, restoring normal meshing transmission and completing the torque transmission.

[0489] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0490] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0491] 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.

Claims

1. A refrigerator, characterized in that, include: Box; The door is slidably connected to the housing; Automatic switching unit, comprising: case; A drive mechanism configured to provide driving force; An actuator configured to move toward the housing or move away from the housing under the action of the driving force; A transmission gear system configured to connect the drive mechanism and the actuator; A sensing mechanism, electrically connected to the automatic switch unit, the sensing mechanism comprising: A position sensing component configured to determine the position state of the actuator; A pressure sensing component is disposed on the door body. The pressure sensing component includes a pressure sensor configured to contact the actuator under the actuation of the actuator to release a contact signal, or to disengage from the actuator to release a disengagement signal. When the actuator is in a semi-deployed state and the pressure sensor releases a disengagement signal, the actuator moves to a fully deployed state under the action of the driving force, so that the actuator returns to the retracted state.

2. The refrigerator according to claim 1, characterized in that, The pressure sensor has a switching part that faces the actuator. The switch is configured to contact the actuator under the push of the actuator and move along the side away from the actuator to release the contact signal.

3. The refrigerator according to claim 2, characterized in that, The pressure sensing assembly further includes a mounting bracket and a movable component. The mounting bracket has a mounting cavity, and the pressure sensor is mounted into the mounting cavity. The mounting bracket has an opening, the movable member is movably covered by the opening, the switch portion abuts against the inner side of the movable member, and the movable member is configured to move along a side away from the actuator under the push of the actuator to abut against the mounting bracket.

4. The refrigerator according to claim 3, characterized in that, The pressure sensing assembly further includes a guide and a fourth elastic member, the guide being disposed between the movable member and the mounting cavity; The guide member is a columnar member, and the fourth elastic member is a compression spring. The fourth elastic member is sleeved on the outer periphery of the guide member and is located between the inner side of the movable member and the bottom wall of the mounting cavity.

5. The refrigerator according to any one of claims 1-4, characterized in that, The transmission gear system includes a second transmission gear and at least one first transmission gear. The second transmission gear is coaxially arranged with the first transmission gear. One of the first transmission gear and the second transmission gear is connected to the drive mechanism, and the other is connected to the actuator. The position sensing component includes a first sensing element and at least two position sensors. One of the first sensing element and the position sensors is disposed on the second transmission gear, and the other is disposed on the housing. The first sensing element is configured to determine the position state of the actuator based on the change in the corresponding position between it and the at least two position sensors.

6. The refrigerator according to claim 5, characterized in that, The second transmission gear is connected to the actuator in a transmission manner; The at least two position sensors include a first position sensor and a second position sensor, which are spaced apart on the second transmission gear along the rotation direction of the second transmission gear.

7. The refrigerator according to claim 6, characterized in that, When the first sensor faces the first position sensor, the actuator is in the retracted state or the fully extended state; when the first sensor faces the second position sensor, the actuator is in the semi-extended state. The first sensing element is a magnetic element, and at least one of the first position sensor and the second position sensor is a Hall sensor; and / or, The first sensing element is a light-emitting element, and at least one of the first position sensor and the second position sensor is a light sensor.

8. The refrigerator according to claim 7, characterized in that, Along the rotation direction of the second transmission gear, the second position sensor is close to the first position sensor in the fully deployed state and is located in front of the first position sensor in the fully deployed state.

9. A method for controlling a refrigerator, characterized in that, The method includes: Acquire the position information of the actuator and the pressure information of the pressure sensing component; The actuator is controlled to reset based on the position information and the pressure information.

10. The refrigerator control method according to claim 9, characterized in that, The step of controlling the actuator to reset based on the position information and the pressure information specifically includes: When the position information indicates that the actuator is in a semi-deployed state and the pressure information indicates a disengagement, the actuator is controlled to be in a fully deployed state under the action of the driving force. When the actuator is in the fully deployed state, control the actuator to reset to the retracted state.

Images