A refrigerator

Abstract

This application discloses a refrigerator, belonging to the field of refrigeration equipment technology, aiming to solve the technical problem of complex structure in related vacuum extraction devices. The refrigerator has air holes constructed on the lid and an air inlet gap constructed between the lid and the inner cup. The minimum flow area of ​​the air inlet gap is smaller than the minimum flow area of ​​the air holes, so that when the suction device is pumping air, the air flow rate in the air inlet gap is less than the air flow rate in the air holes. The amount of air pumped by the suction device from the air inlet gap is only a portion of the total amount of air pumped. The suction device also pumps the original air in the extraction chamber, causing the liquid level in the inner cup to gradually rise. After the suction device stops pumping air, the inner cup is depressurized through the air inlet gap, allowing the brewing liquid in the inner cup to flow back to the outer cup. Compared to depressurizing the inner cup through a pressure relief valve, the air inlet gap structure is simpler, reduces the number of components in the extraction device, eliminates the need for complex piping connections, and simplifies the structure of the extraction device.

Description

Technical Field

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

[0002] Cold brew coffee is a coffee beverage made by steeping coffee grounds in cold water for an extended period. Unlike traditional hot water brewing, cold brew coffee typically requires a longer steeping time. Because it uses cold water, cold brew coffee has lower acidity and a smoother texture. Vacuum cold brew devices accelerate the contact between water and coffee grounds through vacuum extraction, improving the extraction efficiency.

[0003] In related technologies, in a vacuum cold brew device, the coffee powder container is located in the inner cup, which is placed inside the outer cup. A vacuum pump draws water from the outer cup into the inner cup through the coffee powder container. After the vacuum pump stops drawing air, a pressure relief valve increases the air pressure inside the inner cup, causing the water in the inner cup to flow back into the outer cup through the coffee powder container, completing one extraction cycle. This process is repeated to improve the extraction efficiency of water for coffee.

[0004] However, the installation of a pressure relief valve in the vacuum extraction device makes the structure of the vacuum extraction device complex. Utility Model Content

[0005] This application provides a refrigerator that can solve the technical problem of complex structure in related vacuum extraction devices.

[0006] This application provides a refrigerator, including:

[0007] The container is designed with a storage compartment.

[0008] A door for opening or closing the storage room; the door includes a rear wall that faces the storage room when the door is closed.

[0009] An extraction device, located on the rear wall of the door, includes:

[0010] The outer cup has a liquid storage chamber and a first cup opening;

[0011] The inner cup is located inside the liquid storage chamber, and the inner cup forms an extraction chamber and a second cup opening;

[0012] The filter element is located inside the liquid storage chamber and is set at the bottom of the inner cup. The filter element has a powder compartment, which is connected to the liquid storage chamber and the extraction chamber respectively.

[0013] The cup lid covers the second cup opening and the portion that covers the first cup opening; the cup lid has vents that communicate with the extraction chamber; an air inlet gap is formed between the cup lid and the inner cup, and the air inlet gap communicates with the liquid storage chamber and the extraction chamber respectively, and the minimum flow area of ​​the air inlet gap is smaller than the minimum flow area of ​​the vents.

[0014] An air extraction device is installed on the door. The air extraction device is used to connect with the cup lid and draw air from the extraction chamber through the air hole. When the extraction device is drawing air, the air flow rate in the air inlet gap is less than the air flow rate in the air hole.

[0015] In this embodiment of the refrigerator, the minimum flow area of ​​the air inlet gap is smaller than the minimum flow area of ​​the air vent, so that when the air extraction device draws air, the air flow rate of the air inlet gap is less than the air flow rate of the air vent. The amount of air drawn by the air extraction device from the air inlet gap is only a portion of the total amount of air drawn by the air extraction device. The extraction device also draws air from the original extraction chamber. Since the air pressure in the liquid storage chamber is the same as the external air pressure, as the original air in the extraction chamber is gradually drawn away, the air pressure in the extraction chamber gradually decreases and becomes lower than the air pressure in the liquid storage chamber. A pressure difference is formed between the inner and outer cups, causing the brewing liquid in the liquid storage chamber to flow to the extraction chamber after passing through the powder compartment. As the pressure difference gradually increases, the liquid level in the extraction chamber gradually rises.

[0016] When the air extraction device stops, the air in the storage chamber flows into the extraction chamber through the air inlet gap, causing the air pressure in the extraction chamber to gradually increase. The brewing liquid in the extraction chamber flows back to the storage chamber through the powder container. As the air pressure difference between the inner and outer cups gradually decreases, the liquid level in the extraction chamber gradually decreases until it is level with the liquid level in the storage chamber, completing one extraction cycle. This process is repeated to improve the extraction efficiency of water for coffee.

[0017] The refrigerator in this embodiment has vents on the lid and an air inlet gap between the lid and the inner cup. The airflow rate in the air inlet gap is less than the airflow rate through the vents. This allows the inner cup to be depressurized after the degassing device completes the degassing process, causing the brewing liquid inside the inner cup to flow back to the outer cup. Compared to a pressure relief valve, the air inlet gap structure is simpler, reduces the number of components in the extraction device, eliminates the need for complex piping connections, and simplifies the structure of the extraction device.

[0018] In some embodiments of this application, the cup lid includes:

[0019] The lid body consists of a portion that fits onto the first cup opening and a second cup opening; the lid body has pores.

[0020] The first connecting part is located at the bottom of the cover body;

[0021] The inner cup includes:

[0022] The inner cup body forms an extraction chamber;

[0023] The second connecting part is located at the top of the inner cup body. The second connecting part and the cover body are spaced apart. The second connecting part is threadedly connected to the first connecting part, and an air intake gap is formed between the second connecting part and the first connecting part.

[0024] With this configuration, when the air extraction device draws air through the air vent, it also draws air from the storage chamber through the air inlet gap between the first and second connecting parts, and directly draws air from the extraction chamber. As the air in the extraction chamber is gradually removed, the air pressure in the extraction chamber gradually decreases and becomes lower than the air pressure in the storage chamber. A pressure difference is created between the inner and outer cups, causing the brewing liquid in the storage chamber to flow into the extraction chamber after passing through the powder compartment. As the pressure difference gradually increases, the liquid level in the extraction chamber gradually rises.

[0025] When the air extraction device stops, the air in the storage chamber flows into the extraction chamber through the air inlet gap between the first and second connecting parts, causing the air pressure in the extraction chamber to gradually increase. The brewing liquid in the extraction chamber flows back to the storage chamber through the powder compartment. As the air pressure difference between the inner and outer cups gradually decreases, the liquid level in the extraction chamber gradually decreases until it is level with the liquid level in the storage chamber, completing one extraction cycle. This process is repeated to improve the extraction efficiency of water for coffee.

[0026] In some embodiments of this application, the inner cup further includes a stop portion disposed on the outer side wall of the inner cup body. The stop portion is spaced apart from the first connecting portion and forms an air inlet, and the air inlet communicates with the air inlet gap.

[0027] With this configuration, air in the liquid storage chamber can enter the air intake gap through the air inlet and then enter the extraction chamber.

[0028] In some embodiments of this application, the minimum flow area of ​​the air inlet is smaller than the minimum flow area of ​​the air hole;

[0029] When the air extraction device is extracting air, the air flow rate at the air inlet is less than the air flow rate at the air outlet.

[0030] This configuration ensures that when the air extraction device draws air, it draws air from the storage chamber through the air inlet and the air gap, and also directly draws air from the extraction chamber through the air vent. When the air extraction device stops drawing air, the air in the storage chamber enters the extraction chamber through the air inlet and the air gap, causing the liquid level in the extraction chamber to drop slowly.

[0031] In some embodiments of this application, the cross-section of the pore is circular, and the minimum radius of the pore is defined as r;

[0032] The first connecting part is annular, and its inner diameter is defined as d. The height of the air inlet along the axial direction of the first connecting part is defined as H. Then H < r 2 / d.

[0033] This configuration allows the air extraction device to draw air from both the storage chamber and the extraction chamber simultaneously through the air inlet and the air gap. When the air extraction device stops, the air in the storage chamber enters the extraction chamber through the air inlet and the air gap, causing the liquid level in the extraction chamber to drop slowly.

[0034] In some embodiments of this application, the extraction device further includes a flexible seal, which is disposed between the bottom of the first connecting portion and the top of the stop portion, and the flexible seal blocks the portion of the air inlet.

[0035] With this configuration, the flexible seal does not completely seal the air inlet, which reduces the possibility of liquid leaking from the air inlet in the extraction chamber. It also allows some air to enter the air inlet gap through the air inlet when the air extraction device stops, and then enter the extraction chamber to depressurize the extraction chamber so that the liquid level in the extraction chamber drops to be level with the liquid level in the outer cup.

[0036] In some embodiments of this application, the stop portion has a recessed portion on the side facing the first connecting portion, and the recessed portion is recessed in a direction away from the first connecting portion, and a portion of the flexible seal is accommodated in the recessed portion.

[0037] With this design, the recessed portion can confine the active area of ​​the flexible seal within the recessed portion, reducing the possibility of the flexible seal coming off between the first connecting portion and the stop portion.

[0038] In some embodiments of this application, the stop portion has a concave surface corresponding to the recessed portion, and the concave surface is a curved surface.

[0039] With this design, the curved surface can better adapt to the elastic deformation of the flexible seal, making the contact pressure distribution between the flexible seal and the recessed surface more uniform, reducing local stress concentration in the flexible seal, and lowering the possibility of wear on the flexible seal.

[0040] In some embodiments of this application, the extraction apparatus further includes a buoyancy sealing assembly, which comprises:

[0041] A connector is attached to the cup lid. The connector has a movable cavity and a connecting hole at the bottom. The connecting hole and the air hole are respectively connected to the movable cavity.

[0042] The float is movably disposed within the movable cavity and is used to open or close the air vent under the action of buoyancy.

[0043] With this configuration, when the liquid in the extraction chamber flows from the connecting hole to the moving chamber, the float rises under the buoyancy of the liquid and blocks the air hole, thereby reducing the possibility of liquid flowing into the air hole and thus reducing the possibility of water entering the pumping device and pipeline.

[0044] When the liquid in the active chamber flows out through the connecting hole, the buoyancy of the float is released, and the float descends under its own weight, opening the air hole so that the air extraction device can draw air from the extraction chamber through the air hole.

[0045] In some embodiments of this application, the air extraction device includes:

[0046] A connector is located on the rear wall of the door. The connector has a communicating cavity and is used to mate with the cup lid. When the connector is mated with the cup lid, the communicating cavity communicates with the air hole.

[0047] The air extraction component has an air inlet and an air outlet. The air inlet is connected to the connecting cavity, and the air outlet is connected to the outside of the door.

[0048] With this configuration, when the air extraction device is used to extract air, the air enters the connecting cavity from the inlet and is discharged to the outside of the door through the air inlet and outlet of the air extraction device. Attached Figure Description

[0049] To more clearly illustrate the implementation methods in the embodiments of this application or related technologies, the accompanying drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings.

[0050] Figure 1 A schematic diagram of the structure of a refrigerator according to an embodiment of this application is shown;

[0051] Figure 2 It shows Figure 1 A structural schematic diagram of the refrigerator door, extraction device, and air extraction device from a first-view perspective;

[0052] Figure 3 It shows Figure 2 A schematic diagram of the localized explosion structure;

[0053] Figure 4 It shows Figure 2 Schematic diagram of the central air extraction device;

[0054] Figure 5 It shows Figure 1 A schematic diagram of the refrigerator door, extraction device, and air extraction device from a second-view perspective.

[0055] Figure 6 It shows Figure 5 Sectional view along the middle AA direction;

[0056] Figure 7 It shows Figure 6 A magnified view of a portion of point P1 in the middle;

[0057] Figure 8 A schematic diagram of the structure of an extraction device in a refrigerator according to an embodiment of this application is shown;

[0058] Figure 9 It shows Figure 8 Explosion structure diagram Figure 1 ;

[0059] Figure 10 It shows Figure 8 Explosion structure diagram Figure 2 ;

[0060] Figure 11 It shows Figure 8 Sectional view along the BB direction;

[0061] Figure 12 It shows Figure 11 A magnified view of P2 during the extraction process of the extraction device;

[0062] Figure 13 It shows Figure 11 A magnified view of part P2 when the air extraction device stops extracting air;

[0063] Figure 14 A partial cross-sectional view of an extraction apparatus in a refrigerator according to another embodiment of this application is shown.

[0064] Explanation of reference numerals in the attached figures:

[0065] 10. Box body;

[0066] 110. Tank liner;

[0067] 111. Storage room; 112. Access port;

[0068] 120. Box shell; 101. Front wall of the box;

[0069] 20. Door body; 201. Insulation cavity;

[0070] 210. Door frame;

[0071] 211. Upper end cap; 212. Lower end cap;

[0072] 213. Side frame;

[0073] 220. Door inner liner;

[0074] 221. The wall behind the door;

[0075] 230. Door panel;

[0076] 231. The wall in front of the door;

[0077] 240. Door shelf;

[0078] 30. Extraction apparatus;

[0079] 310. Outer cup;

[0080] 311. Outer cup body; 3111. Liquid storage chamber;

[0081] 3112. First rim of the cup; 3113. Spout of the cup;

[0082] 312. Cup handle;

[0083] 320. Inner cup;

[0084] 321. Inner cup body;

[0085] 3211. Extraction chamber; 3212. Liquid inlet;

[0086] 322. Second connecting part; 3221. Second cup rim;

[0087] 323. Stop section; 3231. Air intake;

[0088] 3232. Depression; 3233. Depression surface;

[0089] 330. Filter components;

[0090] 331. Powder silo;

[0091] 340. Cup lid;

[0092] 341. Cover body; 3411. Air vent;

[0093] 342. First connecting part; 3421. Intake clearance;

[0094] 343. Docking section;

[0095] 350. Flexible seals;

[0096] 360° buoyancy sealing assembly;

[0097] 361. Connector; 3611. Movable cavity;

[0098] 3612, Limiting hole; 3613, Connecting hole;

[0099] 362. Float; 3621. Body section;

[0100] 3622. Sealing rod; 3623. Limiting rod;

[0101] 40. Air extraction device;

[0102] 410. Bracket;

[0103] 420. Mounting bracket;

[0104] 430. Connecting components;

[0105] 431. Connecting cavity;

[0106] 440. Exhaust components;

[0107] 441. Air inlet; 442. Air outlet;

[0108] 450. Pipeline. Detailed Implementation

[0109] To make the objectives and implementation methods of this application clearer, the exemplary implementation methods of this application will be clearly and completely described below with reference to the accompanying drawings of the exemplary embodiments of this application. Obviously, the exemplary embodiments described are only some embodiments of this application, and not all embodiments.

[0110] It should be noted that the brief descriptions of terms in this application are only for the convenience of understanding the embodiments described below, and are not intended to limit the embodiments of this application. Unless otherwise stated, these terms should be understood in their ordinary and common meaning.

[0111] The terms "first," "second," "third," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar or related objects or entities, and do not necessarily imply a specific order or sequence, unless otherwise specified. It should be understood that such terms are interchangeable where appropriate.

[0112] The terms “comprising” and “having”, and any variations thereof, are intended to cover but not exclude inclusion, for example, a product or device that includes a range of components is not necessarily limited to all of the components that are clearly listed, but may include other components that are not clearly listed or that are inherent to such product or device.

[0113] Addressing the issue of complex structures in vacuum extraction devices in related technologies, this application provides a refrigerator with vents on the lid and an air inlet gap between the lid and the inner cup. The minimum flow area of ​​the air inlet gap is smaller than that of the vents, ensuring that the airflow rate through the air inlet gap is less than that through the vents when the suction device is operating. The amount of air drawn from the air inlet gap by the suction device is only a portion of the total air drawn. The suction device also draws in the air already present in the extraction chamber, gradually increasing the liquid level within the chamber. After the suction device stops operating, the inner cup is depressurized through the air inlet gap, allowing the brewing liquid to flow back to the outer cup. Compared to a pressure relief valve, the air inlet gap has a simpler structure, reducing the number of components in the extraction device and eliminating the need for complex piping connections, thus simplifying the overall structure of the extraction device.

[0114] The minimum flow area of ​​the air inlet gap is smaller than that of the air vent, so that when the suction device draws air, the air flow rate through the air inlet gap is less than that through the air vent. The amount of air drawn by the suction device from the air inlet gap is only a portion of the total amount of air drawn by the suction device. The suction device also draws in the air originally present in the extraction chamber. Since the air pressure inside the outer cup is the same as the external air pressure, as the original air in the inner cup is gradually drawn out, the air pressure inside the inner cup gradually decreases and becomes lower than the air pressure inside the outer cup. A pressure difference is formed between the inner and outer cups, causing the brewing liquid in the outer cup to flow into the inner cup after passing through the powder compartment. As the pressure difference gradually increases, the liquid level in the inner cup gradually rises.

[0115] After the suction device stops pumping air, the air in the outer cup flows into the inner cup through the air inlet gap, causing the air pressure in the inner cup to gradually increase. The brewing liquid in the inner cup flows back to the outer cup through the powder compartment. As the air pressure difference between the inner and outer cups gradually decreases, the liquid level in the inner cup gradually decreases until it is level with the liquid level in the outer cup, completing one extraction cycle. This process is repeated to improve the extraction efficiency of water for coffee.

[0116] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0117] It should be noted that, in the embodiments of this application, "front side" refers to the side of the refrigerator facing the user when it is in normal use. "Rear side" refers to the side opposite to the front side, that is, the side of the refrigerator facing away from the user when it is in normal use.

[0118] refer to Figure 1 The refrigerator provided in this application embodiment may include a cabinet 10 having a storage compartment 111, a door 20 connected to the cabinet 10 to open and close the storage compartment 111, and a refrigeration device for supplying cold air to the storage compartment 111.

[0119] A refrigeration unit may be installed inside the enclosure 10. The refrigeration unit can be any refrigeration unit in the related art. The refrigeration unit is used to provide cold air to the storage compartment 111 to reduce the temperature inside the storage compartment 111.

[0120] refer to Figure 1 The box body 10 may include a box liner 110, and a storage compartment 111 may be formed inside the box liner 110. A retrieval opening 112 may be formed on the front side of the storage compartment 111, through which the user can take items from the storage compartment 111 or put items into the storage compartment 111.

[0121] It is understood that the number of storage compartments 111 can be one, two, or more than three. Storage compartments 111 can be configured as refrigerators, freezers, or variable temperature compartments with internal temperature variations.

[0122] refer to Figure 1 The housing 10 may also include a housing shell 20. The housing shell 20 is attached to the outside of the housing liner 110 to form the appearance of the housing 10.

[0123] refer to Figure 1 The enclosure 10 may include a front wall 101, which may be located on the front side of the enclosure 10. The front wall 101 may be the front wall of the enclosure shell 20, or it may be formed by joining the front wall of the enclosure shell 20 and the front wall of the inner liner 110.

[0124] In some possible implementations of the embodiments of this application, the door 20 can be rotatably connected to the box 10 to open and close the access port 112 of the storage room 111.

[0125] The opening and closing states of the door 20 can include an open state and a closed state.

[0126] When door 20 is in the open state (refer to) Figure 1 When the door 20 opens the access port 112, the user can take items from or put items into the storage room 111 through the access port 112.

[0127] When the door 20 is closed, the door 20 closes the access port 112 to reduce the leakage of cold air from the access port 112 in the storage compartment 111, thereby improving the cooling effect of the refrigerator on the items in the storage compartment 111.

[0128] Each storage room 111 may be equipped with at least one door 20.

[0129] Understandably, reference Figure 1 Each storage room 111 may also be equipped with two double doors 20, which will not be described in detail in this embodiment.

[0130] refer to Figure 1 , Figure 2 and Figure 3 The door body 20 may include a door frame 210. The door frame 210 can be rotatably connected to the housing 10. The door frame 210 has high structural strength, and the rotatable connection between the door frame 210 and the housing 10 can improve the reliability of the connection between the door frame 210 and the housing 10.

[0131] refer to Figure 1 , Figure 2 and Figure 3The door body 20 may further include an inner door liner 220 and a door panel 230. The door panel 230 and the inner door liner 220 may be respectively connected to opposite sides of the door frame 210 along its thickness direction Y. When the door body 20 is closed, the inner door liner 220 is closer to the storage compartment 111 than the door panel 230. When the door body 20 is closed, the thickness direction Y of the door frame 210 is substantially consistent with the depth direction of the cabinet 10. The door panel 230, the inner door liner 220, and the door frame 210 form the appearance of the door body 20.

[0132] refer to Figure 3 Along the thickness direction Y of the door body 20, the door liner 220 and the door panel 230 can be spaced apart, forming a heat insulation cavity 201 by the door panel 230, the door liner 220, and the door frame 210. The heat insulation cavity 201 can be filled with heat insulation material, such as foaming agent, which can reduce the heat exchange between the storage compartment 111 inside the refrigerator and the outside, thus achieving a heat preservation effect.

[0133] refer to Figure 1 and Figure 2 The door 20 may include a rear wall 221. When the door 20 is closed, the rear wall 221 may be located on the rear side of the door 20. It should be noted that the rear wall 221 is not a perfectly flat surface; a door seal may be provided on the rear wall 221 to improve sealing, and storage space, such as a storage box or an ice maker, may also be provided. It can be understood that when the door 20 is closed, a portion of the rear wall 221 corresponds to the access opening 112, and another portion of the rear wall 221 corresponds to the front wall 101 of the cabinet. At least part of the rear wall 221 around its perimeter cooperates with the front wall of the cabinet 10 to form a relatively sealed space in the storage compartment 111.

[0134] The rear wall 221 can be the rear wall of the inner door liner 220, or the rear wall of the door frame 210, or include both the rear wall of the door frame 210 and the rear wall of the inner door liner 220.

[0135] refer to Figure 3 The door body 20 may also include a front wall 231. The front wall 231 and the rear wall 221 are disposed opposite each other along the thickness direction Y of the door body 20. When the door body 20 is in the closed state, the front wall 231 may be located on the front side of the door body 20. The front wall 231 may be the front wall of the door panel 230.

[0136] In some possible implementations of the embodiments of this application, reference is made to Figure 3The door frame 210 may include an upper cover 211, a lower cover 212, and two side frames 213. The two side frames 213 are arranged opposite each other along the width direction X of the door body 20. The upper cover 211 is connected to the top of the two side frames 213. The two lower covers 212 are connected to the bottom of the two side frames 213. The door frame 210 may be formed by the two side frames 213, the upper cover 211, and the lower cover 212.

[0137] In some possible implementations of the embodiments of this application, reference is made to Figure 1 and Figure 2 The door body 20 may also include a door shelf 240. The door shelf 240 may be located on one side of the rear wall 221 of the door body 20. The door shelf 240 can be used to place items to improve the space utilization of the storage room 111 and to facilitate the user's access to items. The door shelf 240 may be installed in the inner door liner 220.

[0138] In some possible implementations of the embodiments of this application, reference is made to Figure 2 , Figure 3 and Figure 4 The refrigerator may also include an exhaust device 40. The exhaust device 40 may be located on the door 20.

[0139] refer to Figure 3 and Figure 4 The air extraction device 40 may include a bracket 410, which may be disposed in the heat insulation cavity 201 and may be connected to the side frame 213.

[0140] refer to Figure 2 , Figure 3 and Figure 4 The exhaust device 40 may also include a mounting base 420, which is connected to the bracket 410. At least a portion of the mounting base 420 is located on the side of the rear wall 221 of the door away from the heat insulation cavity 201.

[0141] refer to Figure 2 and Figure 4 The air extraction device 40 may also include a connector 430, which may be located on the side of the rear wall 221 away from the heat insulation cavity 201, and the connector 430 is connected to the mounting base 420.

[0142] refer to Figure 5 , Figure 6 and Figure 7 The connector 430 may be constructed with a communicating cavity 431.

[0143] In some embodiments, the connector 430 and the mounting base 420 can be rotatably connected, and the connector 430 can extend along the width direction X of the door body 20 relative to the pivot of the mounting base 420, so that the connector 430 can rotate upward or downward relative to the door body 20.

[0144] The connector 430 can have a retracted state and an open state. (Reference) Figure 2 , Figure 6 and Figure 7 When the connector 430 is in the open state, the dimension of the connector 430 along the thickness direction Y of the door body 20 is greater than the dimension along the height direction Z of the door body 20. The entrance of the connecting cavity 431 of the connector 430 is located at the bottom of the connector 430, and the entrance of the connecting cavity 431 faces downward.

[0145] When the connector 430 is not in use, rotating it upwards from the open state puts it in a retracted state, reducing its dimension along the thickness direction Y of the door 20. When the door 20 is closed, this reduces the length of the connector 430 extending into the storage compartment 111, thereby reducing the likelihood of the connector 430 colliding with items inside the storage compartment 111. When the connector 430 is in the retracted state, the entrance to the connecting cavity 431 is away from the rear wall 221 of the door.

[0146] When the connector 430 is needed, rotate the connector 430 downward from the retracted state to open the connector 430 so that the inlet of the communicating cavity 431 faces downward.

[0147] refer to Figure 4 The air extraction device 40 may also include an air extraction component 440. The air extraction component 440 may be an air pump or other device capable of drawing in air.

[0148] The exhaust component 440 can be installed inside the insulation cavity 201 to hide the exhaust component 440, making it difficult for users to observe the exhaust component 440 from the outside of the door 20, thus improving the decorative effect of the refrigerator.

[0149] refer to Figure 4 The suction unit 440 may have an air inlet 441 and an air outlet 442. When the suction unit 440 is suctioning air, gas can enter the suction unit 440 through the air inlet 441 and flow out of the suction unit 440 through the air outlet 442. The air inlet 441 can be connected to the outlet of the connecting cavity 431 through a pipe 450, and the air outlet 442 can be in an open state. The air outlet 442 can be used to connect with the environment outside the door 20. The environment outside the door 20 can be the storage compartment 111 or the external environment of the refrigerator.

[0150] In some embodiments, the air extraction component 440 may be connected to the upper end cover 211.

[0151] Understandably, the air extraction component 440 can also be connected to the lower end cover 212 or the side frame 213.

[0152] When the air extraction device 440 extracts air, air enters the connecting cavity 431 through the inlet and exit of the connecting cavity 431, and is discharged to the outside of the door body 20 through the air inlet 441 and the air outlet 442 of the air extraction device 440.

[0153] In some possible implementations of the embodiments of this application, reference is made to Figure 2 The refrigerator may also include an extraction device 30. The extraction device 30 is used to extract beverages such as coffee. The extraction device 30 may be installed directly or indirectly on the rear wall 221 of the door.

[0154] In some implementations, the extraction device 30 may be detachably mounted on the rear wall 221 of the door.

[0155] In other implementations, refer to Figure 2 The extraction device 30 can be selectively placed inside the door shelf 240. That is, the extraction device 30 can be placed inside the door shelf 240 or removed from the door shelf 240 so that the extraction device 30 is indirectly mounted on the rear wall 221 of the door through the door shelf 240.

[0156] The following is for reference Figures 7-13 The structure of the extraction device 30 is described.

[0157] refer to Figure 7 , Figure 9 , Figure 10 and Figure 11 The extraction device 30 may include an outer cup 310. The outer cup 310 may be a cylindrical cup (see reference). Figure 8 , Figure 9 and Figure 10 ), or a rectangular cup (see reference) Figure 2 The outer cup 310 may have a liquid storage cavity 3111 formed inside. The liquid storage cavity 3111 can be used to hold brewing liquid, which is used to brew beverages such as coffee. For example, the brewing liquid can be purified water, mineral water, etc.

[0158] refer to Figure 9 The top of the outer cup 310 may have a first cup opening 3112, which is connected to the liquid storage chamber 3111. The brewing liquid can be added into the liquid storage chamber 3111 through the first cup opening 3112.

[0159] refer to Figure 9 The top edge of the outer cup 310 may have a spout 3113, through which liquid in the liquid storage chamber 3111 can be poured out. The spout 3113 can guide the liquid flow, reducing or preventing liquid from dripping along the outer wall of the outer cup 310 after pouring, so as to keep the outer cup 310 clean.

[0160] refer to Figure 2 and Figure 7The outer cup 310 may include an outer cup body 311 and a handle 312. The outer cup body 311 is constructed with a liquid storage cavity 3111, a first cup mouth 3112, and a cup spout 3113. The handle 312 may be disposed on the outer side wall of the outer cup body 311, and the handle 312 can facilitate holding the outer cup 310.

[0161] refer to Figure 7 , Figure 9 , Figure 10 and Figure 11 The extraction device 30 may further include an inner cup 320, which may be a cylindrical cup. It is understood that the inner cup 320 may also be a cuboid cup or a cup of other shapes. The inner cup 320 is inserted into the liquid storage chamber 3111 through the first opening 3112. The walls of the inner cup 320 and the outer cup 310 are spaced apart.

[0162] refer to Figure 9 An extraction chamber 3211 is formed within the inner cup 320. The top of the inner cup 320 may have a second opening 3221, which communicates with the extraction chamber 3211. (Reference) Figure 10 The bottom of the inner cup 320 may be provided with a liquid inlet 3212, which is connected to the extraction chamber 3211.

[0163] refer to Figure 7 , Figure 9 , Figure 10 and Figure 11 The extraction device 30 may also include a filter element 330, which may be a filter screen, filter cup, etc. A powder container 331 may be formed inside the filter element 330, which can be used to hold ground coffee particles. The size of the coffee particles can be determined according to personal taste.

[0164] The filter element 330 is located within the liquid storage chamber 3111 and is detachably connected to the bottom of the inner cup 320. Exemplarily, the filter element 330 can be threadedly connected to the inner cup 320 to facilitate removal of the filter element 330 from the bottom of the inner cup 320, thereby facilitating the addition or replacement of coffee grounds in the powder container 331, as well as facilitating the cleaning of the filter element 330, or facilitating the replacement of the filter element 330 or the inner cup 320.

[0165] The extraction chamber 3211 can be connected to the powder chamber 331 through the mesh on the filter element 330, so that the liquid in the powder chamber 331 and the extraction chamber 3211 can flow between each other.

[0166] The filter element 330, after being connected to the inner cup 320, is integrally disposed in the liquid storage chamber 3111. The liquid storage chamber 3111 can be connected to the powder hopper 331 through the mesh on the filter element 330, so that the liquid in the powder hopper 331 and the liquid storage chamber 3111 can flow to each other.

[0167] refer to Figure 7 , Figure 9 , Figure 10 and Figure 11 The extraction device 30 may also include a cup lid 340.

[0168] The lid 340 can be closed onto the second cup opening 3221 to cover the second cup opening 3221 and reduce the entry of dust and other particles into the extraction chamber 3211.

[0169] The lid 340 also covers the portion of the first cup opening 3112. For example, the lid 340 can cover the first cup opening 3112 except for the spout 3113, meaning the lid 340 does not cover the spout 3113, allowing the liquid storage chamber 3111 to communicate with the air outside the outer cup 310 through the spout 3113. This serves two purposes: firstly, it can block the first cup opening 3112 to reduce the entry of dust and other contaminants into the liquid storage chamber 3111; secondly, it allows the liquid storage chamber 3111 to communicate with the air outside the outer cup 310 through the portion of the first cup opening 3112 not covered by the lid 340, making the air pressure inside the liquid storage chamber 3111 approximately equal to the air pressure outside the outer cup 310.

[0170] refer to Figures 7-11 The cup lid 340 may be constructed with pores 3411, which are connected to the extraction chamber 3211.

[0171] refer to Figure 7 The cup lid 340 may include a lid body 341 and a mating part 343.

[0172] The lid body 341 can cover the portion of the second cup opening 3221 and the first cup opening 3112.

[0173] refer to Figure 7 , Figure 8 and Figure 9 The mating portion 343 can be disposed on the top of the cover body 341. The mating portion 343 may include at least one ring, and in an implementation where the mating portion 343 includes multiple rings, the multiple rings may be nested. The mating portion 343 surrounds the periphery of the vent 3411.

[0174] refer to Figure 7 The air extraction device 40 is used to connect to the docking part 343 to draw air from the extraction chamber 3211 through the air hole 3411.

[0175] The height between the door shelf 240 and the connector 430 is set reasonably so that when the extraction device 30 is placed on the door shelf 240, the connector 430 can be rotated downwards to the open state so that the connector 430 can be connected with the docking part 343 so that the air hole 3411 is connected to the communicating cavity 431.

[0176] When the connector 430 is connected to the mating part 343, the mating part 343 can also reduce gas leakage between the vent 3411 and the connector 430.

[0177] When it is necessary to extract air from the extraction chamber 3211, the extraction device 30 is placed on the door shelf 240, and the connector 430 is rotated downwards from the retracted state to the open state so that the inlet of the connecting chamber 431 faces downwards and aligns with the docking part 343. When the air extraction device 440 extracts air, it draws air from the extraction chamber 3211 through the connector 430.

[0178] refer to Figure 7 , Figure 11 and Figure 12 An air inlet gap 3421 can be formed between the cup lid 340 and the inner cup 320, and the air inlet gap 3421 is connected to the liquid storage chamber 3111 and the extraction chamber 3211.

[0179] The minimum flow area of ​​the air inlet gap 3421 is smaller than the minimum flow area of ​​the air vent 3411.

[0180] The minimum flow area of ​​the intake gap 3421 refers to the cross-sectional area of ​​the narrowest part of the intake gap 3421 through which air passes. The minimum flow area of ​​the vent 3411 refers to the cross-sectional area of ​​the narrowest part of the vent 3411 through which air passes.

[0181] While the air extraction device 40 is drawing air through the air hole 3411, the air extraction device 40 also draws air from the liquid storage chamber 3111 through the air inlet gap 3421. Figure 12 (Green indicator line). Because the minimum flow area of ​​the air inlet gap 3421 is smaller than the minimum flow area of ​​the air hole 3411, the air flow rate of the air inlet gap 3421 is less than the air flow rate of the air hole 3411 when the air extraction device 40 extracts air.

[0182] The airflow rate of the intake gap 3421 refers to the volume of air passing through the intake gap 3421 per unit time, and the airflow rate of the vent 3411 refers to the volume of air passing through the vent 3411 per unit time.

[0183] refer to Figure 12 When the suction device 40 draws air through the air hole 3411, because the minimum flow area of ​​the air inlet gap 3421 is smaller than that of the air hole 3411, the air flow rate of the air inlet gap 3421 is less than that of the air hole 3411. Therefore, the amount of air drawn by the suction device 40 from the air inlet gap 3421 is only a part of the total amount of air drawn by the suction device 40. The suction device will also draw the original air in the extraction chamber 3211. Figure 12(Red indicator line in the middle). Since the air pressure in the storage chamber 3111 is the same as the external air pressure, as the original air in the extraction chamber 3211 is gradually removed, the air pressure in the extraction chamber 3211 gradually decreases and becomes lower than the air pressure in the storage chamber 3111. A pressure difference is formed between the inner cup 320 and the outer cup 310, causing the brewing liquid in the storage chamber 3111 to flow to the extraction chamber 3211 after passing through the powder chamber 331. As the pressure difference gradually increases, the liquid level in the extraction chamber 3211 gradually rises.

[0184] refer to Figure 13 When the pumping device 40 stops pumping, the air in the liquid storage chamber 3111 flows to the extraction chamber 3211 through the air inlet gap 3421. Figure 13 (The green indicator line in the middle) causes the air pressure in the extraction chamber 3211 to gradually increase. The brewing liquid in the extraction chamber 3211 flows back to the storage chamber 3111 through the powder container 331. As the air pressure difference between the inner cup 320 and the outer cup 310 gradually decreases, the liquid level in the extraction chamber 3211 gradually decreases until it is level with the liquid level in the storage chamber 3111, completing one extraction cycle. This process is repeated to improve the extraction efficiency of water for coffee.

[0185] In this embodiment of the refrigerator, an air vent 3411 is constructed on the lid 340, and an air inlet gap 3421 is constructed between the lid 340 and the inner cup 320. The air flow rate of the air inlet gap 3421 is less than that of the air vent 3411, so that after the suction device 40 completes the suction process, the inner cup 320 is depressurized through the air inlet gap 3421, allowing the brewing liquid in the inner cup 320 to flow back to the outer cup 310. Compared with the related technology that uses a pressure relief valve to depressurize the inner cup 320, the air inlet gap 3421 has a simpler structure, reduces the number of components in the extraction device 30, eliminates the need for complex pipeline connections, and simplifies the structure of the extraction device 30.

[0186] In some possible implementations of the embodiments of this application, reference is made to Figure 7 , Figure 9 , Figure 10 and Figure 12 The cup lid 340 may also include a first connecting portion 342, which may be cylindrical. The first connecting portion 342 is disposed at the bottom of the lid body 341.

[0187] refer to Figure 7 and Figure 9 The inner cup 320 may include an inner cup body 321, and the inner cup body 321 forms an extraction chamber 3211.

[0188] refer to Figure 7 , Figure 9 , Figure 10 and Figure 12The inner cup 320 may also include a second connecting part 322, which may be cylindrical and connected to the top of the inner cup body 321.

[0189] refer to Figure 12 The second connecting part 322 can be threadedly connected to the first connecting part 342, and an air intake gap 3421 is formed between the second connecting part 322 and the first connecting part 342.

[0190] In some embodiments, reference Figure 12 The second connecting part 322 can be located inside the first connecting part 342, that is, the second connecting part 322 has an external thread, the first connecting part 342 has an internal thread, and the second connecting part 322 is threadedly connected to the first connecting part 342.

[0191] In other embodiments, the second connecting portion 322 may be located outside the first connecting portion 342, that is, the second connecting portion 322 has an internal thread, the first connecting portion 342 has an external thread, and the second connecting portion 322 is threadedly connected to the first connecting portion 342.

[0192] refer to Figure 12 The air inlet gap 3421 is connected to the liquid storage chamber 3111. The top of the second connecting part 322 and the bottom of the cover body 341 are spaced apart so that the air in the air inlet gap 3421 can flow into the extraction chamber 3211 through the gap between the second connecting part 322 and the cover body 341.

[0193] refer to Figure 12 When the air extraction device 40 draws air through the air hole 3411, it also draws air from the liquid storage chamber 3111 through the air inlet gap 3421 between the first connecting part 342 and the second connecting part 322, and directly draws the original air from the extraction chamber 3211 through the air hole 3411. As the original air in the extraction chamber 3211 is gradually drawn away, the air pressure in the extraction chamber 3211 gradually decreases and becomes lower than the air pressure in the liquid storage chamber 3111. A pressure difference is formed between the inner cup 320 and the outer cup 310, causing the brewing liquid in the liquid storage chamber 3111 to flow to the extraction chamber 3211 after passing through the powder chamber 331. As the pressure difference gradually increases, the liquid level in the extraction chamber 3211 gradually rises.

[0194] refer to Figure 12When the air extraction device 40 stops extracting air, the air in the liquid storage chamber 3111 flows to the extraction chamber 3211 through the air inlet gap 3421 between the first connecting part 342 and the second connecting part 322, causing the air pressure in the extraction chamber 3211 to gradually increase. The brewing liquid in the extraction chamber 3211 flows back to the liquid storage chamber 3111 through the powder container 331. As the air pressure difference between the inner cup 320 and the outer cup 310 gradually decreases, the liquid level in the extraction chamber 3211 gradually decreases until it is level with the liquid level in the liquid storage chamber 3111, completing one extraction cycle. This process is repeated to improve the extraction efficiency of water for coffee.

[0195] In some possible implementations of the embodiments of this application, reference is made to Figure 12 The inner cup 320 may also include a stop 323.

[0196] refer to Figure 12 In the implementation where the second connecting portion 322 is located inside the first connecting portion 342, a stop portion 323 is disposed on the outer wall of the inner cup body 321. The stop portion 323 is spaced apart from the first connecting portion 342 and forms an air inlet 3231, which communicates with the air inlet gap 3421. Air in the liquid storage chamber 3111 can enter the air inlet gap 3421 through the air inlet 3231 and then enter the extraction chamber 3211.

[0197] In the implementation where the second connecting portion 322 is located outside the first connecting portion 342, a stop portion 323 is disposed on the inner sidewall of the inner cup body 321. The stop portion 323 is spaced apart from the first connecting portion 342 and forms an air inlet 3231, which communicates with the air inlet gap 3421. Air in the liquid storage chamber 3111 can enter the air inlet 3231 through the air inlet gap 3421 and then enter the extraction chamber 3211.

[0198] In some possible implementations of this application's embodiments, when the suction device 40 is evacuating air, the airflow rate from the storage chamber 3111 to the extraction chamber 3211 is determined by the smaller of the airflow rates at the inlet 3231 and the inlet gap 3421. Since the airflow rate at the inlet 3231 is less than the airflow rate at the inlet gap 3421, as long as the airflow rate at the inlet 3231 is less than the airflow rate at the vent 3411, the suction device 40 can evacuate air from the storage chamber 3111 through both the inlet 3231 and the inlet gap 3421, and also directly evacuate the existing air from the extraction chamber 3211 through the vent 3411. When the suction device 40 stops evacuating air, the air in the storage chamber 3111 enters the extraction chamber 3211 through the inlet 3231 and the inlet gap 3421, causing the liquid level in the extraction chamber 3211 to slowly decrease.

[0199] In some possible implementations of the embodiments of this application, reference is made to Figure 12The cross-section of the vent 3411 is circular. For example, the vent 3411 can be a single circular hole with a uniform radius or multiple circular holes with different radii.

[0200] If the minimum radius of pore 3411 is defined as r, then the minimum cross-sectional area of ​​pore 3411 is πr. 2 .

[0201] The first connecting part 342 is annular, and the inner diameter of the first connecting part 342 is defined as d. The height of the air inlet 3231 along the axial direction of the first connecting part 342 is defined as H. The air inlet 3231 can be understood as an annular opening on the side of a cylinder. The total cross-sectional area of ​​the air inlet 3231 is πd*H.

[0202] To ensure that the airflow rate at the air inlet 3231 is less than the airflow rate at the vent 3411, it is only necessary to ensure that πd*H < πr. 2 That is, make H < r 2 / d allows the air extraction device 40 to draw air both from the storage chamber 3111 through the air inlet 3231 and the air inlet gap 3421, and directly draw the existing air from the extraction chamber 3211 through the air hole 3411. When the air extraction device 40 stops drawing air, the air in the storage chamber 3111 enters the extraction chamber 3211 through the air inlet 3231 and the air inlet gap 3421, causing the liquid level in the extraction chamber 3211 to drop slowly.

[0203] In some possible implementations of the embodiments of this application, reference is made to Figure 14 The extraction device 30 may further include a flexible seal 350, which may be disposed between the bottom of the first connecting portion 342 and the top of the stop portion 323, and the flexible seal 350 blocks part of the air inlet 3231. Exemplarily, the top of the flexible seal 350 may abut against the bottom portion of the first connecting portion 342. The flexible seal 350 may not be deformed or may be deformed to a small extent. The flexible seal 350 does not completely seal the air inlet 3231, which can reduce the possibility of liquid leakage from the air inlet 3231 in the extraction chamber 3211. Furthermore, when the suction device 40 stops suction, some air can enter the air inlet gap 3421 through the air inlet 3231, and then enter the extraction chamber 3211 to depressurize the extraction chamber 3211, causing the liquid level in the extraction chamber 3211 to drop to be level with the liquid level in the outer cup 310.

[0204] In some possible implementations of the embodiments of this application, reference is made to Figure 9 and Figure 14, on the side where the stopper portion 323 faces the first connecting portion 342, a recess portion 3232 may be formed. The recess portion 3232 recesses in a direction away from the first connecting portion 342. In a cross-section passing through the axis of the inner cup 320, the bottom surface of the recess portion 3232 may be a curve (refer to Figure 14 ), or "U" shaped, or "凵" shaped, etc.

[0205] A part of the flexible seal 350 is accommodated in the recess portion 3232. The recess portion 3232 can limit the movement area of the flexible seal 350 within the recess portion 3232, reducing the possibility of the flexible seal 350 coming out from between the first connecting portion 342 and the stopper portion 323.

[0206] In some possible implementation manners of the embodiments of the present application, refer to Figure 9 and Figure 14 , the stopper portion 323 has a recessed surface 3233 corresponding to the recess portion 3232. The recessed surface 3233 is a curved surface recessing in a direction away from the first connecting portion 342. The curved surface can better adapt to the elastic deformation of the flexible seal 350, making the contact pressure distribution between the flexible seal 350 and the recessed surface 3233 more uniform, reducing the local stress concentration of the flexible seal 350, and reducing the possibility of wear of the flexible seal 350.

[0207] In some possible implementation manners of the embodiments of the present application, refer to Figure 11 , the extraction device 30 may further include a buoyancy seal assembly 360.

[0208] Refer to Figure 11 , the buoyancy seal assembly 360 may include a connecting member 361. The connecting member 361 is connected to the cup lid 340. The connecting member 361 and the cup lid 340 may be threadedly connected to facilitate the disassembly of the connecting member 361. An activity cavity 3611 may be formed inside the connecting member 361. A communication hole 3613 may be formed at the bottom of the connecting member 361. The communication hole 3613 and the air hole 3411 are respectively communicated with the activity cavity 3611.

[0209] When the air extraction device 40 extracts air, the air in the extraction cavity 3211 can flow through the communication hole 3613 to the activity cavity 3611, and then flow to the air hole 3411 and be extracted away.

[0210] Refer to Figure 11 , the buoyancy seal assembly 360 may further include a float 362. The float 362 is movably disposed in the connecting member 361. The density of the float 362 may be less than the density of the brewing liquid. When the liquid in the extraction cavity 3211 flows through the communication hole 3613 to the activity cavity 3611, the float 362 floats under the action of the buoyancy of the liquid and blocks the air hole 3411 to reduce the possibility of the liquid flowing to the air hole 3411, thereby reducing the possibility of water entering the air extraction device 40 and the pipeline 450.

[0211] When the liquid in the active chamber 3611 flows out of the connecting hole 3613, the buoyancy of the float 362 is released, and the float 362 descends under its own weight and opens the air hole 3411, so that the air extraction device 40 can draw air from the extraction chamber 3211 through the air hole 3411.

[0212] In some possible implementations of the embodiments of this application, reference is made to Figure 11 The float 362 may include a body 3621, a sealing rod 3622, and a limiting rod 3623.

[0213] A sealing rod 3622 can be disposed at the top of the body portion 3621. The axis of the sealing rod 3622 can be approximately parallel to the axis of the vent 3411, and the sealing rod 3622 is opposite to the vent 3411. When the bottom of the body portion 3621 abuts against the connector 361, the sealing rod 3622 opens the vent 3411. When the body portion 3621 rises under the action of liquid buoyancy, the bottom of the body portion 3621 separates from the connector 361, and the sealing rod 3622 seals the vent 3411.

[0214] The limiting rod 3623 can be provided at the bottom of the body part 3621. The bottom of the body part 3621 can also be constructed with a limiting hole 3612. During the process of the body part 3621 floating or falling relative to the connecting member 361, the limiting rod 3623 is always inserted into the limiting hole 3612 to limit the radial degree of freedom of the body part 3621 along the limiting rod 3623, so that the sealing rod 3622 can be kept in the position opposite to the air hole 3411. When the body part 3621 floats or falls, the sealing rod 3622 can be inserted into the air hole 3411 more accurately, or moved out of the air hole 3411.

[0215] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

[0216] For ease of explanation, the above description has been provided in conjunction with specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or to limit the embodiments to the specific forms disclosed above. Various modifications and variations can be obtained based on the above teachings. The selection and description of the above embodiments are for the purpose of better explaining the principles and practical applications, thereby enabling those skilled in the art to better utilize the described embodiments and various different variations of embodiments suitable for specific use considerations.

Claims

1. A refrigerator, characterized in that, include: The box (10) has a storage room (111); A door (20) for opening or closing the storage room (111); the door (20) includes a rear wall (221) which faces the storage room (111) when the door (20) is closed. An extraction device (30) is disposed on the rear wall (221) of the door, the extraction device (30) comprising: The outer cup (310) has a liquid storage cavity (3111) and a first cup opening (3112); An inner cup (320) is disposed within the liquid storage cavity (3111), and the inner cup (320) forms an extraction cavity (3211) and a second cup opening (3221); A filter element (330) is located inside the liquid storage chamber (3111) and disposed at the bottom of the inner cup (320). The filter element (330) has a powder container (331), which is connected to the liquid storage chamber (3111) and the extraction chamber (3211) respectively. A cup lid (340) covers the second cup opening (3221) and also covers the portion of the first cup opening (3112); the cup lid (340) has an air hole (3411) that communicates with the extraction chamber (3211); an air inlet gap (3421) is formed between the cup lid (340) and the inner cup (320), and the air inlet gap (3421) communicates with both the liquid storage chamber (3111) and the extraction chamber (3211). The minimum flow area of ​​the air inlet gap (3421) is smaller than the minimum flow area of ​​the air hole (3411); an air extraction device (40) is provided on the door body (20), the air extraction device (40) is used to connect with the cup lid (340), and draws air from the extraction chamber (3211) through the air hole (3411); when the air extraction device (40) draws air, the air flow rate of the air inlet gap (3421) is smaller than the air flow rate of the air hole (3411).

2. The refrigerator according to claim 1, characterized in that, The cup lid (340) includes: The lid body (341) covers the portion that fits onto the first cup opening (3112) and the second cup opening (3221), and the lid body (341) is provided with the air hole (3411); The first connecting part (342) is disposed at the bottom of the cover body (341); The inner cup (320) includes: The inner cup body (321) has the extraction chamber (3211) formed thereon; The second connecting part (322) is disposed on the top of the inner cup body (321). The second connecting part (322) and the cover body (341) are spaced apart. The second connecting part (322) is threadedly connected to the first connecting part (342), and the air intake gap (3421) is formed between the second connecting part (322) and the first connecting part (342).

3. The refrigerator according to claim 2, characterized in that, The inner cup (320) also includes a stop (323), which is disposed on the outer side wall of the inner cup body (321). The stop (323) is spaced apart from the first connecting part (342) and forms an air inlet (3231). The air inlet (3231) is connected to the air inlet gap (3421).

4. The refrigerator according to claim 3, characterized in that, The minimum flow area of ​​the air inlet (3231) is smaller than the minimum flow area of ​​the air hole (3411); When the air extraction device (40) extracts air, the air flow rate of the air inlet (3231) is less than the air flow rate of the air hole (3411).

5. The refrigerator according to claim 4, characterized in that, The cross-section of the pore (3411) is circular, and the minimum radius of the pore (3411) is defined as r; The first connecting part (342) is annular, and its inner diameter is defined as d. The height of the air inlet (3231) along the axial direction of the first connecting part (342) is defined as H. Then H < r 2 / d.

6. The refrigerator according to claim 3, characterized in that, The extraction device (30) further includes a flexible seal (350) disposed between the bottom of the first connecting portion (342) and the top of the stop portion (323), the flexible seal (350) blocking part of the air inlet (3231).

7. The refrigerator according to claim 6, characterized in that, The stop portion (323) has a recess (3232) on the side facing the first connecting portion (342), the recess (3232) is recessed in a direction away from the first connecting portion (342), and a portion of the flexible seal (350) is accommodated in the recess (3232).

8. The refrigerator according to claim 7, characterized in that, The stop portion (323) has a concave surface (3233) corresponding to the recessed portion (3232), and the concave surface (3233) is a curved surface.

9. The refrigerator according to any one of claims 1-8, characterized in that, The extraction device (30) further includes a buoyancy sealing assembly (360), which comprises: A connector (361) is connected to the cup lid (340). The connector (361) has a movable cavity (3611). The bottom of the connector (361) has a connecting hole (3613). The connecting hole (3613) and the air hole (3411) are respectively connected to the movable cavity (3611). A float (362) is movably disposed within the movable cavity (3611), and the float (362) is used to open or close the air hole (3411) under the action of buoyancy.

10. The refrigerator according to any one of claims 1-8, characterized in that, The air extraction device (40) includes: A connector (430) is disposed on the rear wall (221) of the door. The connector (430) has a communicating cavity (431) and is used to mate with the cup lid (340). When the connector (430) mates with the cup lid (340), the communicating cavity (431) communicates with the air hole (3411). The air extraction component (440) has an air inlet (441) and an air outlet (442), the air inlet (441) being connected to the communicating cavity (431) and the air outlet (442) being connected to the outside of the door body (20).

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