Refrigerator

Abstract

The invention relates to a refrigerator. The refrigerator comprises a refrigerator body; a refrigerator liner; a first air supply duct and a second air supply duct are formed in the air duct assembly; the electric air door comprises a transmission part, a first baffle and a second baffle. A first transmission wheel and a second transmission wheel are arranged on the transmission part, first driving teeth and third driving teeth are convexly arranged on the first transmission wheel, and second driving teeth are convexly arranged on the second transmission wheel; first transmission teeth are convexly arranged on the first baffle plate; second transmission teeth are convexly arranged on the second baffle plate; when the transmission part rotates in the first direction, the first driving teeth can be meshed with the first transmission teeth firstly, and the second driving teeth can be meshed with the second transmission teeth later, so that the first baffle and the second baffle open the first air supply duct and the second air supply duct in sequence; and when the transmission part rotates in the second direction, the third driving teeth can be meshed with the first transmission teeth firstly, and the second driving teeth can be meshed with the second transmission teeth later, so that the first baffle and the second baffle close the first air supply duct and the second air supply duct in sequence.

Description

Technical Field

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

[0002] A refrigerator is a container that uses the phase change of a refrigerant to create a low-temperature environment for storing food. It is one of the indispensable household appliances for people's home life. As people's living standards improve, the requirements for refrigerator products are getting higher and higher.

[0003] A conventional refrigerator includes a box body, a box liner disposed in the box body, and an air duct assembly disposed on the rear wall of the box liner. A storage compartment is formed in the box liner, and the air duct assembly is usually provided with an air supply duct, which is connected to the storage compartment and is used to deliver cold air to the storage compartment.

[0004] At present, in the box of related refrigerators, an electric damper is usually provided in the air duct assembly, and the electric damper is used to open and close the air supply duct. However, in some models of refrigerator boxes, the storage compartment has multiple temperature zones, and the air duct assembly is provided with multiple air supply ducts, which respectively deliver cold air to different temperature zones; therefore, multiple electric dampers need to be provided in the air duct assembly to open and close different air supply ducts respectively, resulting in an increase in the number of electric dampers in the air duct assembly and the occupied volume, which easily leads to a deterioration in the thermal insulation performance of the air duct assembly. Summary of the invention

[0005] The object of the present invention is to provide a refrigerator to optimize the electric damper structure in the air duct assembly of the refrigerator in the related art to reduce the number of electric dampers and the occupied volume.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] According to one aspect of the present invention, the present invention provides a refrigerator, the refrigerator comprising: a box body, which forms an outer shell of the refrigerator; a box liner, which is arranged in the box body, and a storage compartment with a front end opening is formed in the box liner; an air duct assembly, which is arranged on the rear wall inside the box liner, and a first air supply duct and a second air supply duct are formed in the air duct assembly; an electric damper, which is arranged in the air duct assembly, and the electric damper comprises a driving unit, a transmission member, a first baffle and a second baffle; wherein the driving unit is connected to the transmission member and is used to drive the transmission member to rotate along its own axis; a first transmission wheel and a second transmission wheel are coaxially arranged at intervals on the transmission member, and a first driving tooth and a third driving tooth arranged at intervals are convexly provided on the peripheral side wall of the first transmission wheel, and a second driving tooth is convexly provided on the peripheral side wall of the second transmission wheel; the first baffle is rotatably arranged on one side of the first transmission wheel, and is used to open and close the first air supply duct; a first transmission tooth is convexly provided on the first baffle, and the first transmission tooth can be respectively meshed and connected with the first driving tooth and the third driving tooth; The second baffle is rotatably arranged on one side of the second transmission wheel and is used to open and close the second air supply duct; a second transmission tooth is convexly provided on the second baffle, and the second transmission tooth can be meshed and connected with the second driving tooth; when the driving unit drives the transmission member to rotate in a first direction, the first driving tooth can first mesh with the first transmission tooth and drive the first baffle to rotate and open the first air supply duct; the second driving tooth can then mesh with the second transmission tooth and drive the second baffle to rotate and open the second air supply duct, so that the first air supply duct and the second air supply duct are opened in sequence; when the driving unit drives the transmission member to rotate in a second direction opposite to the first direction, the third driving tooth can first mesh with the first transmission tooth and drive the first baffle to rotate in the opposite direction, closing the first air supply duct; the second driving tooth can then mesh with the second transmission tooth and drive the second baffle to rotate in the opposite direction, closing the second air supply duct, so that the first air supply duct and the second air supply duct are closed in sequence.

[0008] The embodiments of the present invention have the following advantages and positive effects:

[0009] In the refrigerator of the embodiment of the present invention, an electric damper is arranged in the air duct assembly, and the electric damper includes a driving unit, a transmission member, a first baffle and a second baffle; a first transmission wheel and a second transmission wheel are arranged on the transmission member; a first transmission tooth on the first baffle rotating shaft is used to cooperate with a first driving tooth and a third driving tooth on the first transmission wheel, and a second transmission tooth on the second baffle rotating shaft is used to cooperate with a second driving tooth on the second transmission wheel; when the driving unit drives the transmission member to rotate in a first direction, the first driving tooth and the second driving tooth can be meshed with the first transmission tooth and the second transmission tooth in turn, driving the first baffle and the second baffle to rotate in turn, thereby causing the first air supply duct and the second air supply duct to be opened in turn; and when the driving unit drives the transmission member to rotate in a second direction, the third driving tooth and the second driving tooth can be meshed with the first transmission tooth and the second transmission tooth in turn, driving the first baffle and the second baffle to rotate in reverse in turn, thereby causing the first air supply duct and the second air supply duct to be closed in turn. Therefore, this solution can drive the first baffle and the second baffle to open and close the first air supply duct and the second air supply duct respectively through a driving unit and a transmission member, thereby realizing a variety of different usage states, which is beneficial to reducing the number of electric dampers and reducing the volume occupied by the electric dampers. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic structural diagram of a refrigerator according to an embodiment of the present invention.

[0011] Figure 2 yes Figure 1 The schematic diagram of the structure in which the first drawer and the second drawer are removed.

[0012] Figure 3 yes Figure 2 Schematic diagram of some structures in .

[0013] Figure 4 yes Figure 3 Schematic diagram of the structure of the back of the central air duct assembly.

[0014] Figure 5 yes Figure 4 Rear view of the mid-duct assembly.

[0015] Figure 6 yes Figure 5 Schematic diagram of the structure of the air duct assembly in another state.

[0016] Figure 7 yes Figure 5 Schematic diagram of the structure of the electric damper.

[0017] Figure 8 yes Figure 7 Schematic diagram of the structure of the electric damper in another state.

[0018] Fig. 9 yes Figure 7 A front view of the electric damper.

[0019] Fig.10 yes Figure 7 Schematic diagram of the internal structure of the electric damper.

[0020] Fig.11 yes Fig.10 Schematic diagram of the decomposition.

[0021] Fig.12 yes Fig.11 Schematic diagram of the structure of the first transmission wheel and the second transmission wheel on the middle transmission member.

[0022] Fig.13 yes Fig.10 Schematic diagram of the structure of the first baffle, the first transmission wheel, the second baffle and the second transmission wheel in the initial state.

[0023] Fig.14 Depend on Fig.13 Schematic diagram of the structure in the first state.

[0024] Fig.15 Depend on Fig.14 Schematic diagram of the structure in the second state.

[0025] Fig.16 Depend on Fig.15 Schematic diagram of the structure in the third state.

[0026] Fig.17 Depend on Fig.16 Schematic diagram of the structure in the fourth state.

[0027] Fig.18 Depend on Fig.17 Schematic diagram of the structure in the fifth state.

[0028] Fig.19 Depend on Fig.18 Schematic diagram of the structure in the initial state.

[0029] The accompanying drawings are described as follows: 1. box body; 10. storage compartment; 101. first temperature zone; 102. second temperature zone; 103. third temperature zone; 11. box door; 12. box liner; 13. shelf; 2. air duct assembly; 21. air duct cover; 22. air duct insulation board; 23. first air supply duct; 231. first air outlet; 232. first air inlet; 24. second air supply duct; 241. second air outlet; 242. second air inlet; 25. third air supply duct; 251. third air outlet; 3. electric damper; 31. body; 311. frame; 3111. first window; 3112. second Window; 312, box body; 313, first connecting portion; 314, second connecting portion; 32, first baffle; 321, first rotating shaft portion; 322, second rotating shaft portion; 323, first transmission tooth; 33, second baffle; 331, third rotating shaft portion; 332, fourth rotating shaft portion; 333, second transmission tooth; 34, transmission member; 341, first transmission wheel; 3411, first driving tooth; 3412, third driving tooth; 342, second transmission wheel; 3421, second driving tooth; 343, gear portion; 35, driving unit; 36, gear assembly; 4, first storage drawer; 5, second storage drawer. DETAILED DESCRIPTION

[0030] Typical embodiments that embody the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention can have various changes in different embodiments without departing from the scope of the present invention, and the descriptions and illustrations therein are essentially used for illustration purposes rather than for limiting the present invention.

[0031] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0032] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0033] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0034] At present, in the box of related refrigerators, an electric damper is usually provided in the air duct assembly, and the electric damper is used to open and close the air supply duct. However, in some models of refrigerator boxes, the storage compartment has multiple temperature zones, and the air duct assembly is provided with multiple air supply ducts, which respectively deliver cold air to different temperature zones; therefore, multiple electric dampers need to be provided in the air duct assembly to open and close different air supply ducts respectively, resulting in an increase in the number of electric dampers in the air duct assembly and the occupied volume, which easily leads to a deterioration in the thermal insulation performance of the air duct assembly.

[0035] Figure 1 It is a schematic structural diagram of a refrigerator according to an embodiment of the present invention. Figure 2 yes Figure 1 The schematic diagram of the structure in which the first drawer and the second drawer are removed. Figure 3 yes Figure 2 Schematic diagram of some structures in . Figure 4 yes Figure 3 Schematic diagram of the structure of the back of the middle air duct component 2.

[0036] See also Figures 1 to 4 As shown, the refrigerator provided by the embodiment of the present invention mainly includes a box body 1, an air duct assembly 2 arranged in the box body 1, and an electric damper 3 arranged in the air duct assembly 2.

[0037] The box body 1 adopts a rectangular hollow structure. The box body 1 is constructed as an outer shell of the refrigerator. It should be noted that in other embodiments, the shape of the box body 1 can be designed according to requirements, and a hollow shell structure of other shapes can also be adopted.

[0038] The interior of the box body 1 is defined as a storage compartment 10, which can be used as an independent storage space, such as a freezer, a refrigerator, and a temperature-changing chamber, so as to meet different refrigeration requirements such as freezing, refrigeration, and temperature-changing according to different types of food, and to perform storage.

[0039] In some embodiments, a plurality of mutually separated storage compartments 10 may be provided in the box body 1, and the plurality of storage compartments 10 may be arranged vertically or horizontally.

[0040] In some embodiments, a door 11 is provided on the front side of the cabinet 1, and the door 11 is used to open and close the storage compartment 10. The door 11 and the cabinet 1 can be connected by a hinge, so that the door 11 of the refrigerator can rotate around the axis of the hinge to open and close the refrigerator door 11, thereby opening and closing the corresponding storage compartment 10. It is understandable that a plurality of doors 11 can be provided, and they are arranged one by one with the storage compartments 10. It is also possible that a plurality of doors 11 open and close a storage compartment 10 at the same time.

[0041] See also Figures 1 to 3 As shown, a box liner 12 is provided in the box body 1, the front side of the box liner 12 is open, and the storage compartment 10 is formed in the inner space of the box liner 12. It can be understood that a plurality of box liner 12 can be provided in the box body 1, and the plurality of box liner 12 are distributed left and right or up and down. One or more storage compartments 10 can be formed in each box liner 12.

[0042] In some embodiments, a refrigeration assembly (not shown in the figure) is provided in the box body 1, and the refrigeration assembly is used to provide coldness inside the refrigerator to maintain a low temperature environment of each storage compartment 10. The refrigeration assembly includes a compressor, a condenser, an evaporator, a throttling device, etc. The specific structure and connection relationship of the refrigeration assembly can refer to the refrigeration assembly in the relevant technology, which will not be repeated here.

[0043] See also Figures 1 to 3 As shown, in some embodiments, a shelf 13 is provided in the storage compartment 10, and the shelf 13 is used to place items in layers. The shelf 13 is horizontally arranged in the storage compartment 10, that is, the shelf 13 is horizontally installed in the box 12. Therefore, the storage compartment 10 can be divided into multiple storage areas by the shelf 13, and items or food can be classified and stored in different storage areas.

[0044] In some embodiments, a plurality of shelves 13 are provided, and the plurality of shelves 13 are arranged in the storage compartment 10 at intervals up and down. Therefore, objects or food materials can be stored on different shelves 13 by categories.

[0045] See also Figures 1 to 4 As shown, in some embodiments, the air duct assembly 2 is disposed inside the box 12 and on the rear wall inside the box 12. The storage compartment 10 is formed on the front side of the air duct assembly 2, and the air duct assembly 2 is disposed on the back side of the box 12 corresponding to the storage compartment 10. An air supply duct is formed in the air duct assembly 2, and the air supply duct is connected to the storage compartment 10 on the front side of the air duct assembly 2, and then the cold air in the refrigerator is transported into the corresponding storage compartment 10 through the air supply duct, so as to realize the refrigeration function of the corresponding storage compartment 10.

[0046] In some embodiments, the air supply duct is recessed on the back side of the duct assembly 2. When the duct assembly 2 is mounted on the rear wall inside the box 12, the air supply duct can be formed between the back side of the duct assembly 2 and the rear wall inside the box 12.

[0047] It should be noted that, in other embodiments, the air supply duct may also be formed separately inside the duct assembly 2 .

[0048] In some embodiments, the air duct assembly 2 includes an air duct cover plate 21 and an air duct insulation plate 22 .

[0049] The air duct cover plate 21 is a plate-shaped structure as a whole, and is covered on the rear wall inside the box 12. The air duct cover plate 21 is arranged parallel or substantially parallel to the rear wall inside the box 12. The space in front of the air duct cover plate 21 is used to form the storage compartment 10, and the space between the back side of the air duct cover plate 21 and the rear wall inside the box 12 is used to provide installation space for the air supply duct.

[0050] The duct insulation board 22 is fixedly arranged on the back side of the duct cover board 21, and the air supply duct is formed in a recessed manner on the back side of the duct insulation board 22. The duct insulation board 22 can be made of duct foam, that is, the duct insulation board 22 can be made of foam material. Therefore, when the duct assembly 2 is installed on the rear wall inside the box 12, the duct insulation board 22 is sandwiched between the back side of the duct cover board 21 and the rear wall inside the box 12, and the air supply duct is enclosed and formed between the back side of the duct insulation board 22 and the rear side groove wall of the rear wall duct installation groove inside the box 12.

[0051] It should be noted that, in other embodiments, the air duct assembly 2 may further include an air duct back plate (not shown in the figure), which is disposed on the back side of the air duct insulation plate 22, and the air duct back plate is fixedly connected to the back side of the air duct cover plate 21, thereby clamping and fixing the air duct insulation plate 22 between the air duct cover plate 21 and the air duct bottom plate. In this case, the air supply duct may be formed between the back side of the air duct insulation plate 22 and the air duct back plate.

[0052] See also Figures 1 to 4 As shown, in some embodiments, at least two temperature zones are formed in the storage compartment 10, including a first temperature zone 101 and a second temperature zone 102. The shelf 13 is disposed in the first temperature zone 101. A first storage drawer 4 is disposed at the second temperature zone 102, and the first storage drawer 4 is pullable and disposed in the storage compartment 10. The second temperature zone 102 is isolated from the first temperature zone 101. When the first storage drawer 4 is placed in the storage compartment 10, the second temperature zone 102 can be formed in the first storage drawer 4, thereby isolating the second temperature zone 102 from the first temperature zone 101.

[0053] In some embodiments, a third temperature zone 103 is further formed in the storage compartment 10, and a second storage drawer 5 is provided at the third temperature zone 103, and the second storage drawer 5 is pullable and arranged in the storage compartment 10. The third temperature zone 103 is isolated from the first temperature zone 101 and the second temperature zone 102. When the second storage drawer 5 is placed in the storage compartment 10, the third temperature zone 103 can be formed in the second storage drawer 5, thereby isolating the third temperature zone 103 from the first temperature zone 101 and the second temperature zone 102.

[0054] Figure 5 yes Figure 4 Rear view of the middle air duct assembly 2. Figure 6 yes Figure 5 A schematic structural diagram of the middle air duct assembly 2 in another state.

[0055] See also Figures 4 to 6 As shown, in some embodiments, two air supply ducts are provided in the air duct assembly 2, including a first air supply duct 23 and a second air supply duct 24. The first air supply duct 23 is connected to the first temperature zone 101, and the second air supply duct 24 is connected to the second temperature zone 102, so that cold air can be transported to the first temperature zone 101 through the first air supply duct 23, and cold air can be transported to the second temperature zone 102 through the second air supply duct 24, so that the first temperature zone 101 and the second temperature zone 102 are cooled respectively.

[0056] See also Figures 4 to 6 As shown, in some embodiments, a first air outlet 231 is provided at one end of the first air supply duct 23, and the first air outlet 231 connects the first air supply duct 23 and the first temperature zone 101. Therefore, the cold air in the first air supply duct 23 can be transported into the first temperature zone 101 through the first air outlet 231, thereby achieving cooling of the first temperature zone 101.

[0057] In some embodiments, a plurality of first air outlets 231 are provided, and the plurality of first air outlets 231 are disposed at the left and right edges of the air duct assembly 2 , so that cold air can be simultaneously delivered to the first temperature zone 101 through the plurality of first air outlets 231 .

[0058] It should be noted that, in other embodiments, the first air outlet 231 may also be provided on the front side of the air duct assembly 2 , that is, the first air outlet 231 may also be provided on the front side of the air duct cover 21 .

[0059] See also Figures 4 to 6 As shown, in some embodiments, a second air outlet 241 is provided at one end of the second air supply duct 24, and the second air outlet 241 connects the second air supply duct 24 and the second temperature zone 102. Therefore, the cold air in the second air supply duct 24 can be transported into the second temperature zone 102 through the second air outlet 241, thereby achieving cooling of the second temperature zone 102.

[0060] In some embodiments, the second air outlet 241 is disposed on the front side of the air duct assembly 2. When the first storage drawer 4 is extended into the storage compartment 10, the second air outlet 241 is connected to the second temperature zone 102 in the first storage drawer 4, and then cold air can be simultaneously delivered to the second temperature zone 102 through the second air outlet 241, thereby achieving cooling of the second temperature zone 102.

[0061] It should be noted that, in other embodiments, a plurality of second air outlets 241 may be provided, and the plurality of second air outlets 241 are all connected to the second temperature zone 102 . The number of the second air outlets 241 may be adjusted as required and is not limited here.

[0062] See also Figures 4 to 6 As shown, in some embodiments, the end of the first air supply duct 23 away from the first air outlet 231 forms a first air inlet end 232, and the first air inlet end 232 is used to connect to the evaporator bin (not shown in the figure), and the evaporator is arranged in the evaporator bin. Therefore, the evaporator can form a large amount of cold air in the evaporator bin, and the cold air in the evaporator bin can enter the first air supply duct 23 through the first air inlet end 232, and be transported into the first temperature zone 101 in the storage compartment 10 through the first air outlet 231, thereby realizing the refrigeration function of the first temperature zone 101 in the storage compartment 10.

[0063] In some embodiments, the second air supply duct 24 has a second air inlet end 242 at one end away from the second air outlet 241, and the second air inlet end 242 is used to connect to the evaporator compartment. Therefore, the cold air in the evaporator compartment can also enter the second air supply duct 24 through the second air inlet end 242, and be transported to the second temperature zone 102 in the storage compartment 10 through the second air outlet 241, thereby realizing the refrigeration function of the second temperature zone 102 in the storage compartment 10.

[0064] Figure 7 yes Figure 5 Schematic diagram of the structure of the middle air duct component 2. Figure 8 yes Figure 7 A schematic diagram of the structure of the electric damper 3 in another state. Fig. 9 yes Figure 7 A front view of the electric damper 3. Fig.10 yes Figure 7 Schematic diagram of the structure inside the electric damper 3. Fig.11 yes Fig.10 Schematic diagram of the decomposition.

[0065] See also Figures 4 to 11 As shown, in some embodiments, the electric damper 3 is disposed in the air duct assembly 2, and the electric damper 3 is used to respectively open and close the first air supply duct 23 and the second air supply duct 24. The electric damper 3 includes a body 31, a first baffle 32, a second baffle 33, a transmission member 34 and a drive unit 35.

[0066] The body 31 is installed in the air duct assembly 2, and the first baffle 32 and the second baffle 33 are rotatably arranged in the body 31 respectively. The first baffle 32 is arranged at the first air inlet end 232 of the first air supply duct 23, and the first baffle 32 is used to rotate and open and close the first air inlet end 232, thereby opening and closing the first air supply duct 23. The second baffle 33 is arranged at the second air inlet end 242 of the second air supply duct 24, and the second baffle 33 is used to rotate and open and close the second air inlet end 242, thereby opening and closing the second air supply duct 24. Therefore, the first air supply duct 23 can be closed or opened by rotating the first baffle 32, so as to realize the cooling control of the first temperature zone 101. At the same time, the second air supply duct 24 can be closed or opened by rotating the second baffle 33, so as to realize the cooling control of the second temperature zone 102.

[0067] See also Figures 7 to 11 As shown, in some embodiments, a first rotating shaft portion 321 and a second rotating shaft portion 322 are respectively convexly provided on both axial sides of the first baffle plate 32, and the first rotating shaft portion 321 and the second rotating shaft portion 322 are coaxially spaced. The first rotating shaft portion 321 and the second rotating shaft portion 322 are respectively rotatably connected to the body 31, and are arranged opposite to the first air inlet end 232 of the first air supply duct 23, so that the first baffle plate 32 can be rotatably arranged on the body 31, and the first air supply duct 23 is opened or closed by the rotation of the first baffle plate 32.

[0068] In some embodiments, a third rotating shaft portion 331 and a fourth rotating shaft portion 332 are respectively convexly disposed on both axial sides of the second baffle plate 33, and the third rotating shaft portion 331 and the fourth rotating shaft portion 332 are coaxially spaced. The third rotating shaft portion 331 and the fourth rotating shaft portion 332 are respectively rotatably connected to the body 31, and are arranged opposite to the second air inlet end 242 of the second air supply duct 24, so that the second baffle plate 33 can be rotatably disposed on the body 31, and the second air supply duct 24 is opened or closed by the rotation of the second baffle plate 33.

[0069] Fig.12 yes Fig.11 A schematic structural diagram of the first transmission wheel 341 and the second transmission wheel 342 on the middle transmission member 34.

[0070] See also Figures 7 to 12As shown, in some embodiments, the transmission member 34 is arranged in an axial column shape, and the transmission member 34 is rotatably arranged inside the body 31. The first baffle 32 and the second baffle 33 are rotatably arranged on one side of the transmission member 34. The transmission member 34 is provided with a first transmission wheel 341 and a second transmission wheel 342 arranged axially at intervals, the first baffle 32 is rotatably arranged on one side of the first transmission wheel 341, and the second baffle 33 is rotatably arranged on one side of the second transmission wheel 342. When the transmission member 34 rotates forward or reversely along its own axis, the transmission member 34 can drive the first baffle 32 to rotate forward or reversely on the body 31 through the first transmission wheel 341, and then open and close the first air supply duct 23 through the rotation of the first baffle 32; the transmission member 34 can also drive the second baffle 33 to rotate forward or reversely on the body 31 through the second transmission wheel 342, and then open and close the second air supply duct 24 through the rotation of the second baffle 33.

[0071] See also Figure 10 to Figure 11 As shown, in some embodiments, the driving unit 35 is disposed in the body 31, and the output end of the driving unit 35 is drivingly connected to one end of the transmission member 34. The driving unit 35 can drive the transmission member 34 to rotate in the forward or reverse direction along its own axis, and then can drive the first baffle 32 to rotate in the forward or reverse direction through the first transmission wheel 341, and can drive the second baffle 33 to rotate in the forward or reverse direction through the second transmission wheel 342, thereby opening and closing the first air supply duct 23 and the second air supply duct 24 respectively.

[0072] See also Figures 7 to 11 As shown, in some embodiments, the body 31 includes a frame portion 311 and a box portion 312. The frame portion 311 is provided with a first window 3111 and a second window 3112 arranged at intervals, the first window 3111 is directly connected to the first air inlet end 232 of the first air supply duct 23, and the second window 3112 is directly connected to the second air inlet end 242 of the second air supply duct 24. At the same time, the first baffle 32 is rotatably connected to the frame portion 311 through the first rotating shaft portion 321 and the second rotating shaft portion 322, and the first baffle 32 is directly arranged to face the first window 3111. The second baffle 33 is rotatably connected to the frame portion 311 through the third rotating shaft portion 331 and the fourth rotating shaft portion 332, and the second baffle 33 is directly arranged to face the second window 3112. Therefore, the first baffle 32 can open and close the first window 3111 by rotating forward and reverse directions, thereby rotating to open and close the first air supply duct 23. Similarly, the second baffle 33 can open and close the second window 3112 by rotating forward and reverse directions, thereby rotating and opening and closing the second air supply duct 24.

[0073] In some embodiments, the box body 312 is fixed to one side of the frame body 311, the driving unit 35 is disposed inside the box body 312, the transmission member 34 is rotatably disposed inside the frame body 311, and one end of the transmission member 34 extends into the box body 312 and is in transmission connection with the output end of the driving unit 35. Therefore, the driving unit 35 can drive the transmission member 34 to rotate in the forward or reverse direction along its own axis, and then can drive the first baffle 32 to rotate on the frame body 311 to open and close the first air supply duct 23, and can drive the second baffle 33 to rotate on the frame body 311 to open and close the second air supply duct 24.

[0074] In some embodiments, the end of the transmission member 34 extending into the box body 312 is provided with a gear portion 343. At the same time, the driving unit 35 adopts a driving motor, and the output shaft of the driving motor is in driving connection with the gear portion 343 of the transmission member 34. Therefore, when the output shaft of the driving motor rotates forward or reversely, the gear portion 343 can synchronously rotate forward or reversely, thereby driving the transmission member 34 to rotate forward or reversely along its own axis, thereby driving the first baffle 32 to rotate to open and close the first air supply duct 23, and driving the second baffle 33 to rotate to open and close the second air supply duct 24.

[0075] In some embodiments, a gear assembly 36 is provided in the box body 312, and the gear assembly 36 includes a plurality of reduction gears, and the plurality of reduction gears are provided between the output shaft of the drive motor and the gear portion 343 of the transmission member 34, so that the output shaft of the drive motor can be connected to the gear portion 343 of the transmission member 34 through the plurality of reduction gears, thereby converting the high rotation speed of the output shaft of the drive motor into the low rotation speed of the transmission member 34, so that the drive motor can more accurately control the rotation speed and rotation angle of the first baffle 32 and the second baffle 33.

[0076] See also Fig. 9 As shown, in some embodiments, a first connection portion 313 and a second connection portion 314 are convexly disposed in the frame portion 311, and the first connection portion 313 and the second connection portion 314 are disposed on both sides of the axial direction of the first baffle 32. At the same time, the first rotation shaft portion 321 of the first baffle 32 is rotatably connected to the first connection portion 313, and the second rotation shaft portion 322 of the first baffle 32 is rotatably connected to the second connection portion 314, so that the first baffle 32 can be rotatably disposed on the frame portion 311.

[0077] In some embodiments, the first connection portion 313 is spaced apart from the box body 312. The second baffle 33 is disposed on a side of the first baffle 32 close to the box body 312, and the second baffle 33 is disposed between the first connection portion 313 and the box body 312. At the same time, the third rotation axis portion 331 of the second baffle 33 is rotatably connected to the box body 312, and the fourth rotation axis portion 332 of the second baffle 33 is rotatably connected to the first connection portion 313, so that the second baffle 33 can be rotatably disposed on the frame body 311.

[0078] It should be noted that, in other embodiments, the second baffle 33 may also be disposed on a side of the first baffle 32 away from the box body 312 .

[0079] See also Figures 7 to 11 As shown, in some embodiments, the electric damper 3 is arranged at the bottom edge of the air duct assembly 2, that is, the frame portion 311 and the box portion 312 of the main body 31 are both arranged at the bottom edge of the air duct assembly 2. At the same time, the first air inlet end 232 of the first air supply duct 23 extends to the bottom edge of the air duct assembly 2 and is directly connected to the first window 3111. The second air inlet end 242 of the second air supply duct 24 extends to the bottom edge of the air duct assembly 2 and is directly connected to the second window 3112. Therefore, when the first baffle 32 closes the first window 3111 and the second baffle 33 closes the second window 3112, the electric damper 3 can isolate the cold air below the bottom side of the air duct assembly 2, that is, the electric damper 3 can isolate the cold air in the external area of ​​the air duct assembly 2, thereby preventing the cold air from entering the air duct assembly 2 and forming a low-temperature zone inside the air duct assembly 2, thereby preventing the low-temperature zone from affecting the temperature of the storage compartment 10 on the front side of the air duct assembly 2, thereby preventing the thermal insulation performance of the air duct assembly 2 from deteriorating.

[0080] It should be noted that, in other embodiments, the electric damper 3 may also be disposed at other side edges of the air duct assembly 2, such as the top side edge, the left side edge, or the right side edge. Therefore, the frame portion 311 and the box portion 312 of the main body 31 of the electric damper 3 may also be disposed at other side edges of the air duct assembly 2.

[0081] Fig.13 yes Fig.10 Schematic diagram of the structure of the first baffle plate 32, the first transmission wheel 341, the second baffle plate 33 and the second transmission wheel 342 in the initial state A0. Fig.14 Depend on Fig.13 Schematic diagram of the structure in the first state A1. Fig.15 Depend on Fig.14 Schematic diagram of the structure in the second state A2. Fig.16 Depend on Fig.15 Schematic diagram of the structure in the third state A3. Fig.17 Depend on Fig.16Schematic diagram of the structure in the fourth state A4. Fig.18 Depend on Fig.17 Schematic diagram of the structure in the fifth state A5. Fig.19 Depend on Fig.18 Schematic diagram of the structure in the initial state A0.

[0082] See also Figures 10 to 19 As shown, in some embodiments, the first driving teeth 3411 and the third driving teeth 3412 are convexly provided on the peripheral side wall of the first transmission wheel 341, and the first driving teeth 3411 and the third driving teeth 3412 are respectively protruded from the peripheral side wall of the first transmission wheel 341, and the first driving teeth 3411 and the third driving teeth 3412 are arranged at intervals in the circumferential direction. At the same time, the first baffle 32 is convexly provided with a first transmission tooth 323 on one side close to the transmission member 34, and the first transmission tooth 323 can be meshed and connected with the first driving teeth 3411 and the third driving teeth 3412 respectively. Therefore, when the transmission member 34 rotates, the first transmission wheel 341 can engage with the first transmission teeth 323 of the first baffle 32 through the first driving teeth 3411, thereby driving the first baffle 32 to rotate and open and close the first air supply duct 23; at the same time, when the transmission member 34 rotates, the second transmission wheel 342 can also engage with the first transmission teeth 323 of the first baffle 32 through the third driving teeth 3412, thereby driving the first baffle 32 to rotate and open and close the first air supply duct 23.

[0083] A second driving tooth 3421 is convexly provided on the peripheral side wall of the second transmission wheel 342, and the second driving tooth 3421 protrudes out of the peripheral side wall of the second transmission wheel 342. At the same time, a second transmission tooth 333 is convexly provided on one side of the second baffle plate 33 close to the transmission member 34, and the second transmission tooth 333 can be meshed and connected with the second driving tooth 3421. Therefore, when the transmission member 34 rotates, the second transmission wheel 342 can mesh with the second transmission tooth 333 of the second baffle plate 33 through the second driving tooth 3421, thereby driving the second baffle plate 33 to rotate and open and close the second air supply duct 24.

[0084] See also Figures 10 to 19 As shown, the first drive teeth 3411, the second drive teeth 3421 and the third drive teeth 3412 are arranged in sequence in the circumferential direction of the transmission member 34, so that the first drive teeth 3411, the second drive teeth 3421 and the third drive teeth 3412 can cooperate with the first transmission teeth 323 and the second transmission teeth 333 to successively drive the first baffle 32 and the second baffle 33 to rotate, thereby realizing different opening and closing states of the first baffle 32 and the second baffle 33.

[0085] Specifically, when the driving unit 35 drives the transmission member 34 to rotate in the first direction, the first driving teeth 3411 of the first transmission wheel 341 can first mesh with the first transmission teeth 323 of the first baffle plate 32, driving the first baffle plate 32 to rotate forward, thereby opening the first air supply duct 23. The second driving teeth 3421 of the second transmission wheel 342 can then mesh with the second transmission teeth 333 of the second baffle plate 33, driving the second baffle plate 33 to rotate forward, thereby opening the second air supply duct 24. Therefore, the first driving teeth 3411 of the first transmission wheel 341 cooperate with the first transmission teeth 323 of the first baffle plate 32, and the second driving teeth 3421 of the second transmission wheel 342 cooperate with the second transmission teeth 333 of the second baffle plate 33, so that the first air supply duct 23 and the second air supply duct 24 can be opened in sequence, as shown in FIG. Fig.13 , Figure 14 to Figure 15 shown.

[0086] When the driving unit 35 drives the transmission member 34 to rotate in a second direction opposite to the first direction, the third driving teeth 3412 of the first transmission wheel 341 can first mesh with the first transmission teeth 323 of the first baffle plate 32, driving the first baffle plate 32 to rotate in the opposite direction, thereby closing the first air supply duct 23. The second driving teeth 3421 of the second transmission wheel 342 can then mesh with the second transmission teeth 333, driving the second baffle plate 33 to rotate in the opposite direction, thereby closing the second air supply duct 24. Therefore, the third driving teeth 3412 of the first transmission wheel 341 cooperate with the first transmission teeth 323 of the first baffle plate 32, and the second driving teeth 3421 of the second transmission wheel 342 cooperate with the second transmission teeth 333 of the second baffle plate 33, so that the first air supply duct 23 and the second air supply duct 24 can be closed in sequence. Fig.16 , Figure 17 to Figure 18 shown.

[0087] To summarize, compared with the current solutions on the market that use multiple dampers to open and close different air supply ducts, the electric damper 3 in the embodiment of the present invention can cooperate with the transmission member 34 through a driving unit 35, and utilize the first transmission wheel 341 and the second transmission wheel 342 on the transmission member 34 to drive the first baffle 32 and the second baffle 33 to open and close the first air supply duct 23 and the second air supply duct 24 respectively, thereby realizing a variety of different usage states, which is beneficial to reducing the number of electric dampers 3 and reducing the occupied volume of the electric dampers 3.

[0088] See also Figures 10 to 19 As shown, in some embodiments, the first shaft portion 321 is circumferentially arranged opposite to the first transmission wheel 341. The first transmission tooth 323 is disposed on the outer wall of the first shaft portion 321, and the first transmission tooth 323 is disposed on one side of the first shaft portion 321 close to the first transmission wheel 341.

[0089] It should be noted that, in other embodiments, the first transmission tooth 323 may also be disposed on the outer wall of the second shaft portion 322. In this case, the second shaft portion 322 and the first transmission wheel 341 are arranged circumferentially opposite to each other, and the first transmission tooth 323 is disposed on a side of the second shaft portion 322 close to the first transmission wheel 341. In other embodiments, the first transmission tooth 323 may also be disposed at other positions on a side of the first baffle 32 close to the transmission member 34.

[0090] See also Figures 10 to 19 As shown, in some embodiments, the third shaft portion 331 is circumferentially arranged opposite to the second transmission wheel 342. The second transmission tooth 333 is disposed on the outer wall of the second shaft portion 322, and the second transmission tooth 333 is disposed on one side of the second shaft portion 322 close to the second transmission wheel 342.

[0091] It should be noted that, in other embodiments, the second transmission tooth 333 may also be disposed on the outer wall of the fourth shaft portion 332. In this case, the fourth shaft portion 332 and the second transmission wheel 342 are arranged circumferentially opposite to each other, and the second transmission tooth 333 is disposed on a side of the fourth shaft portion 332 close to the second transmission wheel 342. In other embodiments, the second transmission tooth 333 may also be disposed at other positions on a side of the second baffle 33 close to the transmission member 34.

[0092] See also Fig.13 and Fig.14 As shown, in some embodiments, the working state of the electric damper 3 includes an initial state A0 and a first state A1. In the initial state A0, the first baffle 32 closes the first air supply duct 23, and the second baffle 33 closes the second air supply duct 24. Fig.13 In the first state A1, the first baffle 32 opens the first air supply duct 23, and the second baffle 33 closes the second air supply duct 24. Fig.14 When the electric damper 3 is in the initial state A0, the transmission member 34 rotates in the first direction, and the first driving tooth 3411 is meshed with the first transmission tooth 323, as shown in FIG. Fig.13 As shown, after the transmission member 34 continues to rotate in the first direction by a first preset angle, such as 45°, the electric damper 3 changes to the first state A1. Fig.14 shown.

[0093] In some embodiments, in the initial state A0, the first driving tooth 3411 just meshes with the first transmission tooth 323. Fig.13 Therefore, the electric damper 3 can be transformed from the initial state A0 to the first state A1 only by driving the transmission member 34 to continue rotating in the first direction by the first preset angle.

[0094] It should be noted that, in other embodiments, in the initial state A0, the first drive tooth 3411 may be arranged at intervals from the first transmission tooth 323. When the transmission member 34 rotates a certain angle in the first direction, the first drive tooth 3411 is just engaged with the first transmission tooth 323. After that, the electric damper 3 can be transformed from the initial state A0 to the first state A1 only after the transmission member 34 is driven to continue rotating the first preset angle in the first direction.

[0095] See also Fig.14 and Fig.15 As shown, in some embodiments, the working state of the electric damper 3 also includes a second state A2. In the second state A2, the first baffle 32 opens the first air supply duct 23, and the second baffle 33 opens the second air supply duct 24. Fig.15 When the electric damper 3 is in the first state A1, the transmission member 34 rotates in the first direction, and the second driving tooth 3421 is meshed with the second transmission tooth 333, as shown in FIG. Fig.14 As shown, after the transmission member 34 continues to rotate along the first direction by a second preset angle, such as 45°, the electric damper 3 changes to the second state A2, such as Fig.15 In the second state A2, the first transmission tooth 323 abuts against the outer peripheral wall of the first transmission wheel 341, so that the first baffle 32 can keep the first air supply duct 23 open.

[0096] In some embodiments, in the first state A1, the second driving tooth 3421 just meshes with the second transmission tooth 333. Fig.14 Therefore, the electric damper 3 can be transformed from the first state A1 to the second state A2 only by driving the transmission member 34 to continue rotating in the first direction by a second preset angle.

[0097] It should be noted that, in other embodiments, in the first state A1, the second drive tooth 3421 may be arranged at intervals from the second transmission tooth 333. When the transmission member 34 rotates a certain angle in the first direction, the second drive tooth 3421 just meshes with the second transmission tooth 333. After that, the electric damper 3 can be transformed from the first state to the second state A2 only after the transmission member 34 is driven to continue rotating a second preset angle in the first direction.

[0098] See also Figures 14 to 19 As shown, in some embodiments, the electric damper 3 also includes a third state A3, in which the first baffle 32 keeps opening the first air supply duct 23, and the second baffle 33 keeps opening the second air supply duct 24. Fig.16 When the electric damper 3 is in the second state A2, as shown in FIG. Fig.15As shown, after the transmission member 34 continues to rotate along the first direction by a third preset angle, the third driving tooth 3412 can contact and just cross the first transmission tooth 323, so that the electric damper 3 is transformed into the third state A3. Fig.16 As shown. In the third state A3, the first transmission tooth 323 abuts against the outer peripheral wall of the first transmission wheel 341, so that the first baffle 32 can keep the first air supply duct 23 open. Similarly, the second transmission tooth 333 abuts against the outer peripheral wall of the second transmission wheel 342, so that the second baffle 33 can keep the second air supply duct 24 open. In addition, the third state A3 is a transitional state. When the electric damper 3 is in the third state A3 and the transmission member 34 rotates in the second direction, the third drive tooth 3412 and the second drive tooth 3421 can be meshed and connected with the first transmission tooth 323 and the second transmission tooth 333, so as to close the first baffle 32 and the second baffle 33 in sequence.

[0099] See also Fig.16 and Fig.17 As shown, in some embodiments, the working state of the electric damper 3 also includes a fourth state A4. In the fourth state A4, the first baffle 32 closes the first air supply duct 23, and the second baffle 33 opens the second air supply duct 24. Fig.17 When the electric damper 3 is in the third state A3, the transmission member 34 rotates in the second direction, and the third driving tooth 3412 is meshed with the first transmission tooth 323, as shown in FIG. Fig.16 As shown, after the transmission member 34 continues to rotate along the second direction by a fourth preset angle, such as 45°, the electric damper 3 changes to the fourth state A4, such as Fig.17 In the fourth state A4, the second transmission tooth 333 abuts against the outer peripheral wall of the second transmission wheel 342, so that the second baffle plate 33 can keep the second air supply duct 24 open.

[0100] In some embodiments, in the third state A3, the third driving tooth 3412 just meshes with the first transmission tooth 323. Fig.16 Therefore, the electric damper 3 can be transformed from the third state A3 to the fourth state A4 only by driving the transmission member 34 to continue rotating in the second direction by a fourth preset angle.

[0101] It should be noted that, in other embodiments, in the third state A3, the third drive tooth 3412 may be arranged at intervals from the first transmission tooth 323. When the transmission member 34 rotates a certain angle in the second direction, the third drive tooth 3412 is just engaged with the first transmission tooth 323. After that, the electric damper 3 can be transformed from the third state to the fourth state A4 only after the transmission member 34 is driven to continue rotating a fourth preset angle in the second direction.

[0102] See also Fig.17and Fig.18 As shown, in some embodiments, the working state of the electric damper 3 also includes a fifth state A5. In the fifth state A5, the first baffle 32 closes the first air supply duct 23, and the second baffle 33 closes the second air supply duct 24. Fig.18 When the electric damper 3 is in the fourth state A4, the transmission member 34 rotates in the second direction, and the second driving tooth 3421 meshes with the second transmission tooth 333, as shown in FIG. Fig.17 As shown, after the transmission member 34 continues to rotate in the second direction by a fifth preset angle, such as 45°, the electric damper 3 changes to the fifth state A5. Fig.18 shown.

[0103] In some embodiments, in the fourth state A4, the second driving tooth 3421 just meshes with the second transmission tooth 333. Fig.15 Therefore, the electric damper 3 can be transformed from the fourth state A4 to the fifth state A5 only by driving the transmission member 34 to continue rotating in the second direction by a fifth preset angle.

[0104] It should be noted that, in other embodiments, in the fourth state A4, the second drive tooth 3421 may also be arranged at intervals from the second transmission tooth 333. When the transmission member 34 rotates a certain angle in the second direction, the second drive tooth 3421 just meshes with the second transmission tooth 333. Thereafter, the electric damper 3 can be transformed from the fourth state A4 to the fifth state A5 only after the transmission member 34 is driven to continue rotating a fifth preset angle in the second direction.

[0105] See also Fig.18 and Fig.19 As shown, in some embodiments, when the electric damper 3 is in the fifth state A5, as shown in FIG. Fig.18 As shown, after the transmission member 34 continues to rotate in the second direction by a sixth preset angle, the first driving tooth 3411 can contact and just pass over the first transmission tooth 323, so that the electric damper 3 is transformed into the initial state A0, as shown in FIG. Fig.19 The initial state A0 is a reset state. When the electric damper 3 is in the initial state A0, when the transmission member 34 rotates in the first direction, the first driving teeth 3411 and the second driving teeth 3421 can be meshed with the first transmission teeth 323 and the second transmission teeth 333, thereby opening the first baffle 32 and the second baffle 33 in sequence.

[0106] See also Figures 13 to 19As shown, in some embodiments, the first preset angle, the second preset angle, the third preset angle, the fourth preset angle, the fifth preset angle and the sixth preset angle are equal in angle value, which are all 45° or other angle values. Therefore, it is convenient to control the drive motor to accurately rotate the same preset angle value in sequence, thereby controlling the first baffle 32 and the second baffle 33 to be in different working states alternately in sequence.

[0107] It should be noted that, in other embodiments, the angle values ​​of the first preset angle, the second preset angle, the third preset angle, the fourth preset angle, the fifth preset angle and the sixth preset angle may not be equal.

[0108] See also Figures 4 to 6 As shown, in some embodiments, a third air supply duct 25 is further provided in the air duct assembly 2. The third air supply duct 25 is connected to the third temperature zone 103, and cold air can be transported to the third temperature zone 103 through the third air supply duct 25 to achieve cooling in the third temperature zone 103.

[0109] In some embodiments, a third air outlet 251 is provided at one end of the third air supply duct 25, and the third air outlet 251 connects the third air supply duct 25 and the third temperature zone 103. Therefore, the cold air in the third air supply duct 25 can be transported into the third temperature zone 103 through the third air outlet 251, thereby achieving cooling of the third temperature zone 103.

[0110] In some embodiments, the third air outlet 251 is disposed on the front side of the air duct assembly 2. When the second storage drawer 5 is extended into the storage compartment 10, the third air outlet 251 is connected to the third temperature zone 103 in the second storage drawer 5, and then cold air can be simultaneously delivered to the third temperature zone 103 through the third air outlet 251, thereby achieving cooling of the third temperature zone 103.

[0111] See also Figures 4 to 6 As shown, in some embodiments, the first baffle 32 is arranged opposite to the first air supply duct 23 and the third air supply duct 25. When the first baffle 32 closes the first air supply duct 23, the first baffle 32 closes the third air supply duct 25 at the same time.

[0112] It should be noted that, in other embodiments, the third air supply duct 25 can be controlled by a separate damper, so as to open and close the third air supply duct 25 separately.

[0113] Although the present invention has been described with reference to several typical embodiments, it should be understood that the terms used are illustrative and exemplary, rather than restrictive. Since the present invention can be embodied in a variety of forms without departing from the spirit or essence of the invention, it should be understood that the above embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope defined by the appended claims, so all changes and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. A refrigerator, characterized in that: include: a cabinet, which forms the outer shell of the refrigerator; A box liner is arranged in the box body, and a storage compartment with a front opening is formed in the box liner; An air duct assembly is arranged on the rear wall inside the box, and a first air supply duct and a second air supply duct are formed in the air duct assembly; An electric damper is arranged in the air duct assembly, and the electric damper includes a driving unit, a transmission member, a first baffle and a second baffle; Wherein, the driving unit is connected to the transmission member and is used to drive the transmission member to rotate along its own axis; The transmission member is provided with a first transmission wheel and a second transmission wheel coaxially arranged at intervals, the first transmission wheel is provided with first drive teeth and third drive teeth arranged at intervals on the peripheral side wall, and the second transmission wheel is provided with a second drive tooth on the peripheral side wall; The first baffle is rotatably disposed on one side of the first transmission wheel and is used to open and close the first air supply duct; a first transmission tooth is convexly disposed on the first baffle, and the first transmission tooth can be meshed and connected with the first driving tooth and the third driving tooth respectively; The second baffle is rotatably disposed on one side of the second transmission wheel and is used to open and close the second air supply duct; a second transmission tooth is convexly disposed on the second baffle, and the second transmission tooth can be meshed and connected with the second driving tooth; When the driving unit drives the transmission member to rotate in the first direction, the first driving tooth can first mesh with the first transmission tooth and drive the first baffle to rotate and open the first air supply duct; the second driving tooth can then mesh with the second transmission tooth and drive the second baffle to rotate and open the second air supply duct, so that the first air supply duct and the second air supply duct are opened in sequence; When the driving unit drives the transmission member to rotate in a second direction opposite to the first direction, the third driving tooth can first mesh with the first transmission tooth and drive the first baffle to rotate in the opposite direction to close the first air supply duct; the second driving tooth can then mesh with the second transmission tooth and drive the second baffle to rotate in the opposite direction to close the second air supply duct, so that the first air supply duct and the second air supply duct are closed in sequence.

2. The refrigerator according to claim 1, characterized in that: The electric damper includes an initial state and a first state; In the initial state, the first baffle closes the first air supply duct, and the second baffle closes the second air supply duct; In the first state, the first baffle opens the first air supply duct, and the second baffle closes the second air supply duct; When the electric damper is in an initial state, the transmission member rotates in a first direction, and the first drive tooth is meshed with the first transmission tooth, and after the transmission member continues to rotate in the first direction by a first preset angle, the electric damper is transformed into the first state.

3. The refrigerator according to claim 2, characterized in that: The electric damper also includes a second state; In the second state, the first baffle opens the first air supply duct, and the second baffle opens the second air supply duct; When the electric damper is in the first state, the transmission member rotates in the first direction, and the second drive tooth is engaged with the second transmission tooth, and the transmission member continues to rotate in the first direction by a second preset angle, the electric damper is transformed into the second state.

4. The refrigerator according to claim 3, characterized in that: The electric damper also includes a third state; In the third state, the first baffle plate keeps opening the first air supply duct, and the second baffle plate keeps opening the second air supply duct; When the electric damper is in the second state, after the transmission member continues to rotate along the first direction by a third preset angle, the third driving tooth can contact and pass over the first transmission tooth, so that the electric damper is transformed into the third state.

5. The refrigerator according to claim 4, characterized in that: The electric damper also includes a fourth state and a fifth state; In the fourth state, the first baffle closes the first air supply duct, and the second baffle opens the second air supply duct; In the fifth state, the first baffle closes the second air supply duct, and the second baffle closes the second air supply duct; When the electric damper is in the third state, the transmission member rotates in the second direction, and the third driving tooth is meshed with the first transmission tooth, the transmission member continues to rotate in the second direction by a fourth preset angle, and the electric damper is transformed into the fourth state; When the electric damper is in the fourth state, the transmission member rotates in the second direction, and the second driving tooth is meshed with the second transmission tooth, after the transmission member continues to rotate in the second direction by a fifth preset angle, the electric damper is transformed into the fifth state; When the electric damper is in the fifth state, after the transmission member continues to rotate in the second direction by a sixth preset angle, the first driving tooth can contact and pass over the first transmission tooth, so that the electric damper is reset to the initial state.

6. The refrigerator according to claim 5, characterized in that: The angle values ​​of the first preset angle, the second preset angle, the third preset angle, the fourth preset angle, the fifth preset angle and the sixth preset angle are equal.

7. The refrigerator according to claim 1, characterized in that: The electric damper also includes a body, which is arranged inside the air duct assembly; The first baffle has a first rotating shaft portion, and the first baffle is rotatably connected to the body through the first rotating shaft portion; the first transmission tooth is convexly disposed on the outer wall of the first rotating shaft portion; The second baffle has a third rotating shaft portion, and the second baffle is rotatably connected to the main body through the third rotating shaft portion; the second transmission tooth is convexly arranged on the outer wall of the third rotating shaft portion.

8. The refrigerator according to claim 7, characterized in that: The main body comprises a frame portion and a box portion; The frame body is provided with a first window and a second window arranged at intervals, the first window is directly connected to the first air supply duct, and the second window is directly connected to the second air supply duct; The box body is fixed to one side of the frame body, and the driving unit is arranged in the box body; The first baffle is rotatably connected to the frame portion via the first rotating shaft portion, and is used to open and close the first window; The second baffle is rotatably connected to the frame portion through the third rotating shaft portion, and is used to open and close the second window; The transmission member is rotatably arranged in the frame body, and one end of the transmission member extends into the box body and is transmission-connected with the output end of the driving unit.

9. The refrigerator according to claim 8, characterized in that: The end of the transmission member extending into the box body is provided with a gear portion; The driving unit is a driving motor, and the output shaft of the driving motor is drivingly connected to the gear part.

10. The refrigerator according to claim 8, characterized in that The frame portion is arranged at the bottom edge of the air duct assembly; One end of the first air supply duct extends to the bottom edge of the duct assembly and is directly connected to the first window; One end of the second air supply duct extends to the bottom edge of the duct assembly and is directly connected to the second window.

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