Air-cooled refrigerator and air duct shielding device thereof

Abstract

The present invention discloses an air duct shielding device and an air-cooled refrigerator, wherein the air duct shielding device comprises: a fan chassis, which has a plurality of air outlets; a first adjusting member, which has a turntable portion and a plurality of first shielding sheets arranged at intervals, and the first adjusting member is configured to rotate around the axis of the turntable portion in a controlled manner; and a second adjusting member, which is arranged between the first adjusting member and the fan chassis, and the second adjusting member has a plurality of second shielding sheets arranged at intervals; wherein when the first adjusting member rotates around the axis of the turntable portion, the second adjusting member is driven to rotate, so that the first shielding sheet and / or the second shielding sheet completely shield, partially shield or completely expose each of the air outlets, thereby adjusting the air outlet area of ​​each of the plurality of air outlets.

Description

Technical Field

[0001] The present invention relates to the technical field of freezing and refrigeration, and in particular to an air-cooled refrigerator and an air duct shielding device thereof. Background Art

[0002] Air-cooled refrigerators can keep food fresh, extend food storage time, and improve food safety. They are essential household appliances.

[0003] The freshness of an air-cooled refrigerator depends largely on the air circulation in the storage room of the air-cooled refrigerator and the temperature difference between the various parts of the refrigerator. The more reasonable the air circulation in the box and the smaller the temperature difference, the better the freshness preservation performance of the refrigerator. The key component that determines whether the air circulation in the refrigerator is reasonable is the air duct, which controls the wind direction and flow size of the refrigerator and directly determines the refrigeration and freshness preservation effect of the refrigerator.

[0004] Figure 1 It is an overall schematic diagram of a conventional air duct shielding device; Figure 2 yes Figure 1 Schematic diagram of the exploded view of the air duct shielding device in FIG.

[0005] like Figure 1 and Figure 2 As shown, the conventional air duct shielding device 10 comprises a driving chassis 1, an air duct shielding plate 3, a fan bearing 4, a fan chassis 5 and a fan 6 which are arranged in sequence, wherein a driving unit 2 is arranged on the driving chassis 1, which drives the air duct shielding plate 3 to rotate in a circumferential direction, so that the shielding piece 31 on the air duct shielding plate 3 is rotated out from the accommodating space 52 of the yielding portion 51 on the fan chassis 5, and the air outlet 53 on the fan chassis 5 is partially or completely closed; or, the shielding piece 31 on the air duct shielding plate 3 is rotated into the accommodating space 52 of the yielding portion 51 on the fan chassis 5, and the air outlet 53 on the fan chassis 5 is partially or completely opened.

[0006] In the air duct shielding device 10, the area of ​​the shielding plate 31 of the air duct shielding plate 3 is consistent with the area of ​​the air outlet 53 of the fan chassis 5. The ratio of the area of ​​the air outlet 53 to the side area of ​​the air duct shielding device 10 cannot be higher than 50%, resulting in limited air supply capacity of the fan 6. Summary of the invention

[0007] The purpose of the present invention is to provide a new air duct shielding device to overcome the problem of limited air supply capacity of the fan due to the small proportion of the area occupied by the air outlet in the traditional air duct shielding device, so as to achieve the effect of increasing the air outlet area, improving the air supply volume, and improving the refrigeration capacity of the refrigerator.

[0008] To achieve one of the above-mentioned objects of the invention, one embodiment of the present invention provides an air duct shielding device, which is suitable for an air-cooled refrigerator, and the air duct shielding device includes: a fan chassis, which has a plurality of air outlets; a first adjusting member, which has a turntable portion and a plurality of first shielding sheets arranged at intervals, and the first adjusting member is configured to rotate around the axis of the turntable portion in a controlled manner; and a second adjusting member, which is arranged between the first adjusting member and the fan chassis, and the second adjusting member has a plurality of second shielding sheets arranged at intervals; wherein, when the first adjusting member rotates around the axis of the turntable portion, it drives the second adjusting member to rotate, so that the first shielding sheet and / or the second shielding sheet completely shield, partially shield or completely expose each of the air outlets, thereby adjusting the air outlet area of ​​each of the plurality of air outlets.

[0009] As an optional technical solution, the fan chassis includes a yielding portion, which has a storage cavity, wherein when each of the air outlets is fully exposed, each of the first shielding sheets and each of the second shielding sheets overlap with each other and are stored in the storage cavity.

[0010] As an optional technical solution, the yielding portion is a U-shaped bending structure protruding from the outer edge of the circular bottom plate of the fan chassis toward a direction away from the second adjusting member.

[0011] As an optional technical solution, a limiting groove is provided on the outer edge of the circular bottom plate of the fan chassis, and the limiting groove is an arc-shaped groove formed inwardly on the outer edge of the circular bottom plate.

[0012] As an optional technical solution, the limiting groove is located between two adjacent easing portions.

[0013] As an optional technical solution, the second adjusting member includes a second annular disk, the second annular disk includes a third side surface and a fourth side surface opposite to each other, the third side surface is adjacent to the fan chassis, and a limit block is provided on the third side surface, wherein the limit groove cooperates with the limit block to limit the rotation angle of the second adjusting member.

[0014] As an optional technical solution, the first adjusting member includes a first annular disk, the second annular disk includes a first side surface and a second side surface opposite to each other, the first side surface is adjacent to the second adjusting member, and a slide groove is arranged on the first side surface; a slider is also arranged on the third side surface; wherein, the slider is inserted into the slide groove, the slide groove can slide along the slider and push against the slider, so that the second adjusting member rotates a certain angle, and then a plurality of the second shielding sheets shield a plurality of the air outlets or expose a plurality of the air outlets.

[0015] As an optional technical solution, the turntable portion is arranged on the second side surface, and the turntable portion is a gear structure.

[0016] As an optional technical solution, it also includes a driving chassis and a driving unit, wherein the driving unit is arranged on one side of the driving chassis, and the driving unit is connected to a driving gear, and the driving gear is meshed with the turntable part, and the driving gear drives the gear structure, so that the first adjusting member rotates a certain angle, and then the plurality of the first shielding sheets shield the plurality of the air outlets or expose the plurality of the air outlets.

[0017] The present invention also provides an air-cooled refrigerator, in which the air duct shielding device as described above is installed.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] By the relative movement of two or more layers of shielding sheets to fold or unfold, the air outlet can be fully exposed, partially shielded or completely shielded, so that the proportion of the area of ​​the air outlet on the duct chassis to the side area of ​​the duct chassis is increased, and the area of ​​the yielding part of the duct chassis (duct blind area) is reduced. Therefore, the air supply capacity of the fan is effectively improved, and the refrigeration capacity of the air-cooled refrigerator is improved.

[0020] In addition, by arranging interacting sliding grooves and sliders on the first adjusting member and the second adjusting member, it is ensured that the first shielding piece and the second shielding piece can move relative to each other to the specified position; by the interaction between the limit block of the second adjusting member and the limit groove of the fan chassis, it is prevented that the second shielding piece of the second adjusting member rotates excessively due to inertia after reaching the specified position.

[0021] Third, the number of rotations of the driving motor is controlled by a program, thereby controlling the movement positions of the first adjusting member and the second adjusting member, changing the size of the air outlet, and realizing the function of variable air supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is an overall schematic diagram of a traditional air duct shielding device.

[0023] Figure 2 yes Figure 1 Schematic diagram of the exploded view of the air duct shielding device in FIG.

[0024] Figure 3 It is a schematic diagram of the air outlet of the air duct shielding device of the present invention being fully opened.

[0025] Figure 4 yes Figure 3 Schematic diagram of the exploded view of the air duct shielding device in FIG.

[0026] Figure 5 yes Figure 3 Schematic diagram of the air outlet of the air duct shielding device being partially closed.

[0027] Figure 6 yes Figure 3 Schematic diagram of the air outlet of the air duct shielding device being completely closed.

[0028] Figure 7 yes Figure 3 Schematic diagram of the air duct chassis.

[0029] Fig. 8A and Figure 8B yes Figure 3 Schematic diagram of the first adjusting member from different viewing angles.

[0030] Fig.9A and Fig. 9B yes Figure 3 Schematic diagram of the second adjusting member from different viewing angles. DETAILED DESCRIPTION

[0031] The present invention will be described in detail below in conjunction with the specific embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and any structural, methodological, or functional changes made by a person skilled in the art based on these embodiments are all within the scope of protection of the present invention.

[0032] Figure 3 is a schematic diagram of the air outlet of the air duct shielding device of the present invention being fully opened; Figure 4 yes Figure 3 Schematic diagram of the exploded view of the air duct shielding device in FIG.

[0033] like Figure 3 and Figure 4 As shown, the air duct shielding device 100 includes a driving chassis 101, a first adjusting member 103, a second adjusting member 104, a fan chassis 106 and a fan 107 assembled in sequence, wherein the driving unit 102 is arranged on the driving base plate 101; the fan 107 is installed in the fan chassis 106, the fan chassis 106 and the fan 107 are connected through a bearing 105, the bearing 105 is located at the center of the fan chassis 106, and the blades of the fan 107 rotate around the bearing 105.

[0034] Figure 7 yes Figure 3 Schematic diagram of the air duct chassis.

[0035] like Figure 4 and Figure 7 As shown, the circular bottom plate of the fan chassis 106 has a plurality of spaced-apart making way portions 1061 , each of which has a receiving cavity 1062 , wherein the gap between any adjacent making way portions 1061 defines an air outlet 1064 of the fan chassis 106 .

[0036] In this embodiment, the yielding portion 1061 is a U-shaped bending structure protruding upward from the edge of the circular bottom plate of the fan chassis 106 (protruding in a direction away from the second adjustment member), and the interior of the U-shaped bending structure corresponds to the storage cavity 1062 .

[0037] The outer edge of the circular bottom plate of the fan chassis 106 is provided with a limiting groove 1063, and the limiting groove 1063 is, for example, an arc-shaped groove formed by the outer edge of the circular bottom plate being concave. The limiting groove 1063 is located between any two adjacent yielding portions 1061. In a preferred embodiment, the limiting groove 1063 can be located in the middle of two adjacent yielding portions 1061.

[0038] In addition, a receiving portion 1065 is further provided on the fan chassis 106 , and the receiving portion 1065 is used to receive the driving unit 102 disposed at the edge of the driving chassis 101 .

[0039] Fig. 8A and Figure 8B yes Figure 3 Schematic diagram of the first adjusting member from different viewing angles.

[0040] like Figure 4 , Fig. 8A and Figure 8B As shown, the first adjusting member 103 has a rotating disk portion 1032 and a plurality of first shielding pieces 1031 disposed at intervals, and the first adjusting member 103 is configured to be controlled to rotate around the axis of the rotating disk portion 1032. The plurality of first shielding pieces 1031 disposed at intervals and the rotating disk portion 1032 are respectively located on opposite sides of the first adjusting member 103.

[0041] Specifically, the first adjusting member 103 includes a first annular disc and a plurality of first shielding sheets 1031 protruding from the outer edge of the first annular disc, and a first gap 1034 is formed between any adjacent first shielding sheets 1031. When the air outlet 1064 of the air duct shielding device 100 is in a fully open state, the first gap 1034 coincides with the air outlet 1064. The first shielding sheet 1031 is an arc-shaped sheet extending along the arc of the first annular disc. The first shielding sheet 1031 extends toward the second adjusting member 104.

[0042] The first annular disc includes a first side surface 1035 and a second side surface 1036 facing each other, wherein the first side surface 1035 is adjacent to the second adjustment member 104, and the second side surface 1036 is adjacent to the driving chassis 101; wherein the second side surface 1036 has a rotating disk portion 1032, and the rotating disk portion 1032 is, for example, a gear structure formed on the second side surface 1036. When the first adjustment member 103 and the driving chassis 101 are assembled, the gear structure is meshed with the driving gear 1021 on the driving chassis 101, and the driving gear 1021 is connected to the driving unit 102, and the driving unit 102 is, for example, a driving motor.

[0043] like Fig. 8A As shown, a slide groove 1033 is further provided on the first side surface 1035, and the slide groove 1033 is connected to a slider 1042 (such as Fig. 9B When the driving gear 1021 rotates, the rotating disk portion 1032 engaged therewith rotates, and the rotating disk portion 1032 drives the first adjusting member 103 to rotate, and then the end of the sliding groove 1033 on the first adjusting member 103 pushes against the slider 1042 embedded in the sliding groove 1033, so that the second adjusting member 104 rotates together with the rotation of the first adjusting member 103.

[0044] In addition, the axis of the rotating disk portion 1032 coincides with the center of the first annular disk.

[0045] Fig.9A and Fig. 9B yes Figure 3 Schematic diagram of the second adjusting member from different viewing angles.

[0046] like Figure 4 , Fig.9A and Fig. 9B As shown, the second adjusting member 104 is sandwiched between the first adjusting member 103 and the fan chassis 106 .

[0047] Specifically, the second adjusting member 104 includes a second annular disc and a plurality of second shielding sheets 1041 protruding from the outer edge of the second annular disc at intervals, and a second gap 1044 is formed between any adjacent second shielding sheets 1041. When the air outlet 1064 of the air duct shielding device 100 is in a fully open state, the second gap 1044 overlaps with the air outlet 1064 and the first gap 1034 respectively. Among them, the second shielding sheet 1041 is an arc-shaped sheet extending along the arc of the second annular disc. The second shielding sheet 1041 extends toward the fan chassis 106.

[0048] Combination Figure 3 It can be seen that when the air outlet 1064 of the air duct shielding device 100 is in a fully open state, each second shielding piece 1041 and each first shielding piece 1031 are respectively located in the storage cavity 1062 of the yielding portion 1061, and the first shielding piece 1031 in each storage cavity 1062 completely overlaps with the second shielding piece 1041. Preferably, the second shielding piece 1041 is located on the inner side of the first shielding piece 1031, that is, the second shielding piece 1041 is closer to the center of the fan chassis 106.

[0049] In other embodiments of the present invention, the first shielding sheet and the second shielding sheet in each storage cavity may also partially overlap, but the end of the first shielding sheet and the end of the second shielding sheet must not extend out of the openings on both sides of the yielding portion for the shielding sheets to be rotated in or out.

[0050] The second annular disc includes a third side surface 1045 and a fourth side surface 1046 which are opposite to each other, wherein the third side surface 1045 is adjacent to the fan chassis 106, and the fourth side surface 1046 is adjacent to the first side surface 1035 of the first adjusting member 103. The third side surface 1045 includes a limit block 1043; a slider 1042 is arranged on the fourth side surface 1046; wherein the limit block 1043 cooperates with the limit groove 1063 on the fan chassis 106; and the slider 1042 cooperates with the slide groove 1033 on the first adjusting member 103.

[0051] In a preferred embodiment, the slider 1042 is inserted into the slide groove 1033, and the length of the slide groove 1033 is greater than the length of the slider 1042. After the slide groove 1033 slides a certain distance relative to the slider 1042, the groove wall at one end of the slide groove 1033 can contact and push against the slider 1042, so that the slider 1042 rotates together with the slide groove 1033, and then each first shielding piece 1031 of the first adjusting member 103 and each second shielding piece 1041 of the second adjusting member 104 can be sequentially extended from the opening on one side of the storage cavity 1062 of the yielding portion 1061 of the fan chassis 106, so as to completely or partially shield the multiple air outlets 1064 on the fan chassis 106.

[0052] Figure 5 yes Figure 3 A schematic diagram of a partially closed air outlet of an air duct shielding device; Figure 6 yes Figure 3 Schematic diagram of the air outlet of the air duct shielding device being completely closed.

[0053] like Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, the driving gear 1021 rotates, driving the turntable portion 1032 on the second side 1036 of the first adjusting member 103 to rotate, and the slide groove 1033 on the first side 1035 of the first adjusting member 103 rotates along the slider 1042 on the fourth side 1046 of the second adjusting member 104. At this time, each first shielding sheet 1031 extends out from the corresponding storage cavity 1062 to shield part of the air outlet 1064.

[0054] When the first adjusting member 103 rotates to a certain angle, one end of the slide groove 1033 contacts and pushes against the slider 1042; when the first adjusting member 103 continues to be driven to rotate, the second adjusting member 104 rotates with the rotation of the first adjusting member 103, and each second shielding piece 1041 on the second adjusting member 104 extends from the storage cavity 1062 of each yielding portion 1061 of the fan chassis 106, partially covering or completely covering each air outlet 1064 on the fan chassis 106.

[0055] like Figure 6 As shown, when the first shielding piece 1031 and the second shielding piece 1041 work together to completely cover the air outlet 1064 on the fan chassis 106, the limit block 1043 on the third side 1045 of the second adjusting member 104 is stopped by the limit groove 1063 on the fan chassis 106, which can effectively prevent the second adjusting member 104 from rotating excessively due to inertia, resulting in incomplete shielding of the air outlet 1064 and air leakage.

[0056] like Figure 6 As shown, when the air outlet 1064 is completely shielded, the rear end of the first shielding sheet 1031 overlaps with the rear end of the second shielding sheet 1041 to prevent the air outlet 1064 from being incompletely shielded and leaking air. In the present invention, when the first adjusting member 103 rotates, the end of the first shielding sheet 1031 that first extends out of the storage cavity 1062 is the front end, and the end that extends out later is the rear end; when the second adjusting member 104 rotates, the end of the second shielding sheet 1041 that first extends out of the storage cavity 1062 is the front end, and the end that extends out later is the rear end; but it is not limited thereto.

[0057] like Figure 3 As shown, when the air outlet 1064 needs to be opened, the driving unit 102 causes the driving gear 1021 to rotate in the opposite direction, causing the first adjusting member 103 to rotate in the opposite direction, the slide slot 1033 to slide in the opposite direction along the slider 1042, the first shielding piece 1031 to slide toward the outside of the second shielding piece 1041, and the air outlet 1046 is partially opened. When the groove wall at the other end of the slide slot 1033 contacts and pushes against the slide slot 1042, the first adjusting member 103 continues to rotate in the opposite direction, and the second adjusting member 104 rotates in the opposite direction along with the first adjusting member 103, and the first shielding piece 1031 and the second shielding piece 1041 move toward the storage cavity 1062 of the yielding portion 1061 of the air duct chassis 106. Among them, when the first shielding piece 1031 and the second shielding piece 1041 overlap each other and stop in the storage cavity 1062, the air outlet 1046 is fully opened.

[0058] Similarly, the upper limit block 1043 of the third side surface 1045 of the second adjusting member 104 abuts against the other end of the limit groove 1063 on the air duct chassis 106 to prevent the second adjusting member 104 from rotating excessively due to inertia, and the second shielding piece 1041 rotates out of the opening on the other side of the storage cavity 1062 to block the air outlet and affect the air supply volume.

[0059] In other words, the limit block 1043 slides in the limit groove 1063 and is stopped by the limit groove 1063, which can be regarded as the limit groove 1063 for limiting the rotation angle of the second adjustment member 104.

[0060] like Figure 5As shown, the air duct shielding device 100 can also control the driving unit 102 (such as a driving motor) on the driving chassis 101 to rotate a certain number of circles through the computer control board setting program in the air-cooled refrigerator, and the driving gear 1021 drives the turntable part 1032, so that the first adjusting member 103 rotates to a specified position, and the first shielding piece 1031 extends out of the storage cavity 1062; at the same time, the first adjusting member 103 acts on the slider 1042 of the second adjusting member 104 through the slide groove 1033, driving the second shielding piece of the second adjusting member 104 to rotate to a specified position, so that the air outlet 1064 is partially opened, thereby realizing the variable air supply function of the fan 107.

[0061] In the present invention, the air duct shielding device 100 cooperates with the first shielding piece 1031 and the second shielding piece 1041 on the first adjusting member 103 and the second adjusting member 104 to make the air outlet 1064 on the air duct chassis 106 fully open, partially shielded or fully shielded.

[0062] Compared with the traditional structure of setting a single-layer shielding sheet at the air outlet, the present invention adopts a foldable and unfoldable two-layer shielding sheet (a first shielding sheet 1031 and a second shielding sheet 1041), which can increase the ratio of the area of ​​the multiple air outlets 1064 to the side area of ​​the air duct chassis 106 to 66.7%, thereby reducing the area occupied by the yielding part 106 (air duct blind area) of the air duct chassis, thereby effectively improving the air supply capacity of the fan and the refrigeration capacity of the air-cooled refrigerator.

[0063] In addition, after the first shielding sheet 1031 and the second shielding sheet 1041 are unfolded, the air outlet is blocked and the fan 107 stops supplying air; after the first shielding sheet 1031 and the second shielding sheet 1041 overlap, they are stored in the yielding portion 106 (blind spot of the air duct) of the fan chassis 106, and the fan 107 starts to supply air; when the volume and speed of the fan remain unchanged, the air supply volume is increased to improve the refrigeration effect of the air-cooled refrigerator.

[0064] Of course, in other embodiments of the present invention, more adjusting parts can be added to completely shield, partially shield or completely expose the air outlet on the duct chassis by the mutual movement of three or more layers of shielding sheets, thereby further reducing the area of ​​the concession portion (duct blind area) on the duct chassis, further increasing the area ratio of the air outlet, increasing the air supply of the fan, and improving the refrigeration effect of the air-cooled refrigerator.

[0065] The present invention further provides an air-cooled refrigerator, in which the air duct shielding device 100 is installed.

[0066] In summary, the beneficial effects of the air duct shielding device and the air-cooled refrigerator provided by the present invention are:

[0067] By the relative movement of two or more layers of shielding sheets to fold or unfold, the air outlet can be fully exposed, partially shielded or completely shielded, so that the proportion of the area of ​​the air outlet on the duct chassis to the side area of ​​the duct chassis is increased, and the area of ​​the yielding part of the duct chassis (duct blind area) is reduced. Therefore, the air supply capacity of the fan is effectively improved, and the refrigeration capacity of the air-cooled refrigerator is improved.

[0068] In addition, by arranging interacting sliding grooves and sliders on the first adjusting member and the second adjusting member, it is ensured that the first shielding piece and the second shielding piece can move relative to each other to the specified position; by the interaction between the limit block of the second adjusting member and the limit groove of the fan chassis, it is prevented that the second shielding piece of the second adjusting member rotates excessively due to inertia after reaching the specified position.

[0069] Third, the number of rotations of the driving motor is controlled by a program, thereby controlling the movement positions of the first adjusting member and the second adjusting member, changing the size of the air outlet, and realizing the function of variable air supply.

[0070] It should be understood that although this specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each implementation mode may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0071] The series of detailed descriptions listed above are only specific descriptions of feasible implementation methods of the present invention. They are not intended to limit the scope of protection of the present invention. Any equivalent implementation methods or changes that do not deviate from the technical spirit of the present invention should be included in the scope of protection of the present invention.

Claims

1. An air duct shielding device, suitable for an air-cooled refrigerator, characterized in that: The air duct shielding device comprises: A fan chassis having a plurality of air outlets; A first adjusting member having a rotating disk portion and a plurality of first shielding pieces arranged at intervals, wherein the first adjusting member is configured to be controlled to rotate around an axis of the rotating disk portion; and A second adjusting member, which is arranged between the first adjusting member and the fan chassis, and the second adjusting member has a plurality of second shielding pieces arranged at intervals; When the first adjusting member rotates around the axis of the rotating disk portion, the second adjusting member is driven to rotate, so that the first shielding sheet and / or the second shielding sheet completely shield, partially shield or completely expose each of the air outlets, thereby adjusting the air outlet area of ​​each of the multiple air outlets; The fan chassis includes a yielding portion having a storage cavity, and each first shielding piece of the first adjusting member and each second shielding piece of the second adjusting member extend out from an opening on one side of the storage cavity in sequence to completely or partially shield multiple air outlets on the fan chassis.

2. The air duct shielding device according to claim 1, characterized in that: in, When each of the air outlets is fully exposed, each of the first shielding sheets and each of the second shielding sheets overlap each other and are stored in the storage cavity.

3. The air duct shielding device according to claim 2, characterized in that: The yielding portion is a U-shaped bending structure protruding from the outer edge of the circular bottom plate of the fan chassis toward a direction away from the second adjusting member.

4. The air duct shielding device according to claim 2, characterized in that: A limiting groove is provided on the outer edge of the circular bottom plate of the fan chassis. The limiting groove is an arc-shaped groove formed on the outer edge of the circular bottom plate and concave.

5. The air duct shielding device according to claim 4, characterized in that: The limiting groove is located between two adjacent easing portions.

6. The air duct shielding device according to claim 4, characterized in that: The second adjusting member includes a second annular disk, which includes a third side surface and a fourth side surface opposite to each other, the third side surface is adjacent to the fan chassis, and a limit block is arranged on the third side surface, wherein the limit groove cooperates with the limit block to limit the rotation angle of the second adjusting member.

7. The air duct shielding device according to claim 6, characterized in that: The first adjusting member includes a first annular disk, and the second annular disk includes a first side surface and a second side surface opposite to each other, the first side surface is adjacent to the second adjusting member, and a slide groove is arranged on the first side surface; a slider is also arranged on the third side surface; wherein, the slider is inserted into the slide groove, and the slide groove can slide along the slider and push against the slider, so that the second adjusting member rotates a certain angle, and then the plurality of the second shielding sheets shield the plurality of the air outlets or expose the plurality of the air outlets.

8. The air duct shielding device according to claim 7, characterized in that: The turntable portion is disposed on the second side surface, and the turntable portion is a gear structure.

9. The air duct shielding device according to claim 8, characterized in that: It also includes a driving chassis and a driving unit, wherein the driving unit is arranged on one side of the driving chassis, the driving unit is connected to a driving gear, the driving gear is meshed with the turntable portion, and the driving gear drives the gear structure to rotate the first adjusting member by a certain angle, so that the first shielding sheets shield the air outlets or expose the air outlets.

10. An air-cooled refrigerator, characterized in that: The air-cooled refrigerator is installed with an air duct shielding device as described in any one of claims 1 to 9.

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