refrigerator

Abstract

This application belongs to the field of home appliance technology and provides a refrigerator, including: a cabinet and a door; an extraction device and an extraction device, both disposed on the door or the cabinet; the extraction device includes an inner cup and an outer cup, the outer cup being in communication with the external environment; the inner cup is located inside the outer cup and has a through hole communicating with the outer cup; the extraction device includes a connecting joint, an extraction motor, and an extraction pipeline, one end of the extraction pipeline being connected to the extraction motor and the other end being connected to the connecting joint; the connecting joint can be connected to the extraction device; the controller is configured to: if the door is closed, control the extraction motor to operate alternately in a first operating mode and a second operating mode, or operate in the first operating mode, so that no bubbles are generated during the extraction process or bubbles are generated only in part of the cycle, reducing the risk of liquid entering the extraction pipeline and shortening the extraction time; if the door is open, control the extraction motor to operate in the second operating mode to generate bubbles for observation of the extraction process.

Description

Technical Field

[0001] This application belongs to the field of home appliance technology, and more specifically, relates to a refrigerator. Background Technology

[0002] Refrigerators, as household appliances, are primarily used for the low-temperature storage of food. With technological advancements, refrigerators have gradually integrated more functions. For example, they can utilize a vacuum device to provide negative pressure for an extraction device, driving liquid to flow through materials (such as coffee powder, tea leaves, etc.) to extract flavor compounds.

[0003] A typical extraction process usually involves two interconnected inner and outer cups. A vacuum device evacuates the inner cup, creating negative pressure. Liquid from the outer cup then enters the inner cup under atmospheric pressure, fully contacting and saturating the ingredients (such as coffee grounds or tea leaves). When the vacuum device stops, the liquid in the inner cup flows back to the outer cup under gravity. To improve extraction visibility, the vacuum device's operating time is extended, generating bubbles in the inner cup. This results in a longer depressurization time, leading to a longer extraction time. Furthermore, the impact of these bubbles makes it easier for liquid from the inner cup to enter the vacuum line, affecting the lifespan of the vacuum device and causing contamination in subsequent extractions due to difficulty in cleaning. Summary of the Invention

[0004] The purpose of this application is to provide a refrigerator to solve the technical problems in the prior art where bubble extraction leads to long extraction time and affects the service life of the air extraction device and the cleanliness of the pipeline.

[0005] To achieve the above objectives, the technical solution adopted in this application is: to provide a refrigerator, comprising: The container has a storage compartment; The door is used to open or close the storage room; An extraction device is detachably installed on the door or the housing; the extraction device includes an inner cup and an outer cup, the outer cup having a liquid storage chamber and communicating with the external environment; the inner cup is at least partially located inside the outer cup and has a through hole communicating with the interior of the outer cup; An air extraction device is installed on the door or the box. The air extraction device includes a docking joint, an air extraction machine, and an air extraction pipeline. One end of the air extraction pipeline is connected to the air extraction machine, and the other end is connected to the docking joint. The docking joint is used to connect to the extraction device so that the air extraction machine can extract air from the inner cup. The controller, electrically connected to the exhaust fan, is configured to: if the door is in a closed state, control the exhaust fan to operate alternately in a first operating mode and a second operating mode, or to operate in the first operating mode. If the door is in the open state, the exhaust fan is controlled to operate in the second operating mode; The time required for the pump to draw the liquid in the storage chamber into the inner cup so that the liquid level in the outer cup is flush with the through hole is T0; the first operating mode is that the pump works for a first duration T1 and stops working for a first set duration S1, where T1 < T0; the second operating mode is that the pump works for a second duration T2 and stops working for a second set duration S2, where T2 > T0.

[0006] Optionally, the controller is configured to: if the air extractor is in operation when the door switches from the closed state to the open state, then control the air extractor to continue operating until the second operating duration T2, so that the air extractor switches to the second operating mode; If the air extractor is in a stopped working phase when the door switches from the closed state to the open state, then the air extractor is controlled to work for a third time T3, and then switched to the second operating mode and stopped working for a second set time S2, where T3 > T0.

[0007] Optionally, the refrigerator further includes a vacuum storage device, which is detachably installed on the door or the cabinet, and the docking joint is selectively connected to the vacuum storage device or the extraction device.

[0008] Optionally, the extraction device further includes a pressure-response element disposed on the extraction pipeline, and the controller is configured to: Based on the received start-up pumping signal, control the pumping machine to work and acquire the output signal of the pressure response element; The type of container that is connected to the docking joint is determined based on the output signal of the pressure response element.

[0009] Optionally, the pressure response element is a pressure switch; the determination of the container type connected to the docking joint based on the output signal of the pressure response element includes: If the output signal of the pressure switch changes within the first judgment period, the container connected to the docking joint is determined to be a vacuum storage device. If the output signal of the pressure switch does not change within the first judgment period, then the container connected to the docking joint is determined to be an extraction device.

[0010] Optionally, the pressure response element is a pressure sensor, and the determination of the container type connected to the docking joint based on the output signal of the pressure response element includes: If the output value of the pressure sensor reaches the first set pressure within the second judgment period, then the container connected to the docking joint is determined to be a vacuum storage device. If the output value of the pressure sensor does not reach the first set pressure within the second judgment period, then the container connected to the docking joint is determined to be an extraction device.

[0011] Optionally, the controller is configured to: If it is determined that the container connected to the docking joint is a vacuum storage device, then the pump will continue to run for a first preset time and then stop working.

[0012] Optionally, the controller is configured to begin acquiring the output signal of the pressure response element when the pump has been operating for a preset stable period of time.

[0013] Optionally, the air extraction device further includes a pressure relief valve installed on the air extraction pipeline, and the controller is electrically connected to the pressure relief valve, the controller being configured to: The pressure relief valve is controlled to be open when the air pump stops working and closed when the air pump is working.

[0014] Optionally, the extraction device further includes a cup lid and a filter element. The cup lid covers the mouths of the inner cup and the outer cup, and the filter element is detachably installed inside the inner cup. The filter element has a limiting protrusion on the side facing the cup lid.

[0015] The beneficial effects of the refrigerator provided in this application are as follows: Compared with the prior art, in this application, when the door is closed, the controller controls the vacuum pump to prevent the extraction device from generating bubbles or to generate bubbles only in part of the cycle during the extraction process, thereby reducing the risk of liquid entering the vacuum pipe. Furthermore, the working time of the vacuum pump is shorter during the cycle in which no bubbles are generated. Thus, by shortening the working time of the vacuum pump in at least part of the cycle, the extraction time can be shortened. When the door is open, the extraction device is controlled to generate bubbles during the extraction process so that the user can observe the extraction process and improve the user experience. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a three-dimensional structural diagram of a refrigerator provided in an embodiment of this application.

[0018] Figure 2 This is a partial three-dimensional structural diagram of the refrigerator provided in an embodiment of this application when the docking joint is connected to the extraction device.

[0019] Figure 3 This is a partial enlarged view of the refrigerator provided in an embodiment of this application.

[0020] Figure 4 This is a three-dimensional structural diagram of the air extraction device used in the embodiments of this application.

[0021] Figure 5 This is a three-dimensional structural diagram of the extraction device used in the embodiments of this application.

[0022] Figure 6 This is a cross-sectional structural diagram of the extraction device used in the embodiments of this application.

[0023] Figure 7 This is a cross-sectional structural diagram of the extraction device used in the embodiments of this application, showing the liquid in the outer cup entering the inner cup and rising to wet the material.

[0024] Figure 8 This is a schematic cross-sectional view of the extraction device used in this embodiment of the application, showing the liquid level in the outer cup being flush with the bottom wall of the inner cup, and the bubbles entering the inner cup and impacting the material.

[0025] Figure 9 This is a cross-sectional structural diagram of the extraction device used in the embodiments of this application when the liquid in the inner cup flows back to the outer cup.

[0026] Figure 10 This is one of the control flowcharts of the refrigerator during extraction provided in the embodiments of this application.

[0027] Figure 11 This is the second control flowchart of the refrigerator during extraction provided in the embodiments of this application.

[0028] Figure 12 This is a partial three-dimensional structural diagram of a refrigerator provided in an embodiment of this application when the docking joint is connected to a vacuum storage device.

[0029] Figure 13 This is one of the control flowcharts for the refrigerator controller provided in the embodiments of this application.

[0030] Figure 14 One of the flowcharts for identifying container types in a refrigerator controller provided in an embodiment of this application.

[0031] Figure 15 This is the second flowchart of a refrigerator controller identifying container types, provided in an embodiment of this application.

[0032] Figure 16 The second control flowchart of the refrigerator controller provided in the embodiments of this application.

[0033] Figure 17 The third control flowchart of the refrigerator controller provided in the embodiments of this application.

[0034] Figure 18 The fourth control flowchart of the refrigerator controller provided in the embodiments of this application.

[0035] The following are the labeling elements in the figure: 101. Box body; 102. Door; 103. Receiving slot; 104. Shelf; 2. Vacuum storage device; 3. Extraction device; 31. Inner cup; 311. Through hole; 32. Outer cup; 33. Cup lid; 331. First lid body; 3331. Connecting part; 332. Second lid body; 3320. Cavity; 3321. Vent hole; 3322. Suction hole; 34. Filter element; 341. Limiting protrusion; 35. Filter screen; 4. Air extraction device; 41. Air extraction fan; 42. Connecting joint; 43. Air extraction pipeline; 44. Pressure relief valve; 45. Pressure response element. Detailed Implementation

[0036] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0037] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0038] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0039] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0040] This application provides a refrigerator, as shown in the embodiments below. Figure 1 As shown, the refrigerator includes a cabinet 101 with a storage compartment, a door 102 connected to the cabinet 101 for opening and closing the storage compartment, and a refrigeration unit for supplying cold air to the storage compartment. The refrigerator can be a double-door refrigerator, a single-door refrigerator, a three-door refrigerator, or a French door refrigerator. Alternatively, it can be a French door refrigerator, i.e., the upper part is a double-door refrigerator compartment providing ample storage space for users, and the lower part is a drawer-style freezer compartment, making it easier to categorize, store, and access frozen foods. The specific form is not limited in this embodiment.

[0041] The refrigerator body 101 includes an inner liner defining a storage compartment, an outer shell disposed outside the inner liner to form the appearance of a refrigerator, and a heat insulation layer disposed between the inner liner and the outer shell to insulate the storage compartment. A loading / unloading opening is formed at the front end of the storage compartment for placing or removing stored items from the storage compartment. A door 102 is rotatably connected to the refrigerator body 101 to open or close the loading / unloading opening of the storage compartment. The number of doors 102 may be one, two, or three, etc.

[0042] In some embodiments of this application, the refrigerator includes an extraction device 3, which is detachably mounted on the cabinet 101 or the door 102. The extraction device 3 is used to extract materials such as coffee powder or tea leaves. Optionally, such as Figure 2 As shown, a shelf 104 is provided on the inner side of the door 102, and the extraction device 3 can be placed on the shelf 104. When disassembly is required, the extraction device 3 can be directly removed from the shelf 104. Alternatively, the door 102 is provided with a slot, in which the extraction device 3 is fitted and positioned. When disassembly is required, the extraction device 3 can be directly pulled out from the slot. In some alternative embodiments, the extraction device 3 is mounted on the housing 101. For example, the extraction device 3 is placed in the storage chamber or installed on the side wall of the housing 101.

[0043] In some embodiments of this application, such as Figure 3 and Figure 4As shown, the extraction device 3 includes an inner cup 31 and an outer cup 32. The outer cup 32 has a liquid storage chamber for holding liquid, and the inner cup 31 is disposed inside the outer cup 32. The inner cup 31 is provided with a through hole 311, which connects the interior of the inner cup 31 with the interior of the outer cup 32, allowing liquid in the liquid storage chamber to enter the inner cup 31 through the through hole 311.

[0044] Optionally, a filter screen 35 with multiple mesh openings is installed at the through-hole 311. When air enters the inner cup 31 through the fine mesh openings of the filter screen 35, it is cut into numerous tiny bubbles by the edges of the mesh. These tiny bubbles have a large specific surface area, multiplying the gas-liquid contact area and enhancing the gas's disturbance to the liquid. The tiny bubbles rise slowly and remain in the liquid for a longer time, continuously acting on the material. The large number of bubbles provides gentle and comprehensive agitation of the material, preventing localized violent impacts that could lead to material breakage or excessive fine powder production. Of course, the filter screen 35 can also be omitted at the through-hole 311, and the number of bubbles can be controlled by adjusting the aperture of the through-hole 311.

[0045] In some embodiments, the bottom wall and side walls of the inner cup 31 are provided with through holes 311. Optionally, multiple through holes 311 are provided, and the multiple through holes 311 on the side walls are arranged at equal intervals around the circumference. Thus, by providing multiple through holes 311, liquid and gas can enter and exit evenly. In addition, during reflux, liquid seeps out simultaneously from the channels formed by the multiple through holes 311 and is evenly distributed in the outer cup 32, avoiding local impact. During bubble impact, air enters simultaneously through each through hole 311, forming multi-point bubbling. The bubble group rises evenly from various positions on the bottom wall of the inner cup 31, achieving comprehensive and thorough agitation of the material layer. When the liquid rises, the liquid enters the outer cup 32 evenly through each through hole 311, so that the material is evenly wetted, avoiding local over-wetting or drying. In other embodiments, through holes 311 are only provided on the side walls of the inner cup 31, and no through holes 311 are provided on the bottom wall of the inner cup 31. Alternatively, the through hole 311 may be provided only on the bottom wall of the inner cup 31, and the side wall of the inner cup 31 may not have the through hole 311.

[0046] The extraction device 3 also includes a cup lid 33 and a filter element 34. The cup lid 33 covers the mouths of the outer cup 32 and the inner cup 31, and the filter element 34 is detachably installed inside the inner cup 31. The filter element 34 has a limiting protrusion 341 protruding from the side facing the cup lid 33.

[0047] The cup lid 33 has a vent hole 3321, allowing the outer cup 32 to communicate with the external environment through the vent hole 3321 when the cup lid 33 is closed on the outer cup 32. Optionally, the cup lid 33 has a first connecting wall and a second connecting wall protruding on the side facing the cup opening, and the first connecting wall and the second connecting wall cooperate to form an annular groove. The first connecting wall is threaded to the cup opening of the outer cup 32. For example, the inner side of the first connecting wall has threads, connecting with the threads on the outer wall of the outer cup 32. The second connecting wall is threaded to the inner cup 31. For example, the outer side of the second connecting wall has threads, the inner wall of the inner cup 31 has threads, and the inner cup 31 is fitted onto the outer side of the second connecting wall and threadedly connected.

[0048] The cup lid 33 has an air extraction hole 3322 that communicates with the interior of the inner cup 31 and a connecting part 3331 for docking with the air extraction device 4. The connecting part 3331 and the docking joint 42 in the air extraction device 4 are detachably connected.

[0049] For example, the inner cup 31 is provided with a filter element 34, which, together with the bottom and side walls of the inner cup 31, forms a material storage compartment. The material can be coffee powder, tea leaves, or traditional Chinese medicine, etc. The filter element 34 has multiple filter holes, allowing communication between the material storage compartment and the space above the filter element 34. Optionally, the filter element 34 is snapped into the inner cup 31, with the material placed directly at the bottom of the inner cup 31. The filter element 34 helps to limit the position of the material. If, during the extraction process, the liquid impacts the material, causing the filter element 34 to move upwards within the inner cup 31, the limiting protrusion 341 will abut against the cup lid 33, thereby preventing the material storage compartment from expanding too much and affecting the extraction efficiency of the liquid entering the inner cup 31.

[0050] like Figure 3 and Figure 4 As shown, the cup lid 33 includes a first lid body 331 and a second lid body 332, which are rotatably connected. An air extraction hole 3322 and a vent hole 3321 are provided on the second lid body 332. The first lid body 331 is provided with a connecting part 3331, which is used to connect to the docking connector 42 in the air extraction device 4.

[0051] When the first cover 331 is flipped over and placed on the second cover 332, the first cover 331 and the second cover 332 are sealed together. Exemplarily, the first cover 331 has a sealing portion that is a closed ring. When the first cover 331 and the second cover 332 are in the closed state, the sealing portion abuts against the second cover 332, thereby forming a sealed cavity 3320 between the first cover 331 and the second cover 332. The vent 3321 is located outside the inner cup 31. When the connecting portion 3331 is connected to the mating joint 42 in the suction device 4, the internal space of the inner cup 31 is connected to the suction pipe 43 in the suction device 4 through the suction hole 3322 and the cavity 3320.

[0052] Please refer to some embodiments of this application. Figure 2 , Figure 5 and Figure 6 As shown, the refrigerator also includes a vacuum device 4, which is installed on the cabinet 101 or the door 102. Figure 5 and Figure 6 As shown, the extraction device 4 includes an extraction pump 41, a docking connector 42, and an extraction pipeline 43. One end of the extraction pipeline 43 is connected to the extraction pump 41, and the other end is connected to the docking connector 42. The docking connector 42 is detachably connected to the extraction device 3.

[0053] The extraction device 3 and the vacuum device 4 can both be installed on the door 102 or both on the housing 101. Alternatively, one of the extraction device 3 and the vacuum device 4 can be installed on the door 102, and the other can be installed on the housing 101.

[0054] In some embodiments of this application, such as Figure 4 As shown, the top of the door 102 is provided with a receiving groove 103, and the vacuum pump 41 is located inside the receiving groove 103. The vacuum pipe 43 is located inside the foam layer of the door 102. The connecting joint 42 is located on the inside of the door 102 and faces the shelf 104 supporting the extraction device 3. Alternatively, the receiving groove 103 is located on the housing 101, and the vacuum pipe 43 is located inside the foam layer of the housing 101. The connecting joint 42 is located on the side wall or top wall of the housing 101 and can be connected to the extraction device 3 housed in the storage chamber.

[0055] The vacuum pump 41 is used to evacuate the extraction device 3 via the docking connector 42. When the extraction device 3 is connected to the docking connector 42, the vacuum pump 41 operates, causing the liquid inside the extraction device 3 to soak the material to extract its flavor. Optionally, the vacuum pump 41 is a vacuum pump. For example, the vacuum pump 41 is a brushed motor vacuum pump, model CJVP28-AC12B41, with a voltage of 12V, a pump head diameter of 25mm-32mm, and an idle flow rate of 1.4-2L / min.

[0056] In some embodiments of this application, during the process of the vacuum pump 41 evacuating the inner cup 31, the inner cup 31 is evacuated by the vacuum pump 41, creating a negative pressure inside the inner cup 31, such as... Figure 7 As shown, the liquid in the outer cup 32 enters the inner cup 31 through the through hole 311 and rises to soak the material, causing the liquid level in the outer cup 32 to gradually decrease. When the liquid level in the outer cup 32 drops to be level with the through hole 311, the vacuum pump 41 continues to operate, as... Figure 8 As shown, bubbles enter the inner cup 31 and impact the material, further releasing the active ingredients. Then, the vacuum pump 41 stops working, and the air pressure inside the inner cup 31 returns to normal. Figure 9 As shown, the liquid in the inner cup 31 flows back into the outer cup 32 under the action of gravity.

[0057] When the liquid level in the outer cup 32 drops to be level with the through hole 311, if the liquid in the outer cup 32 continues to flow into the inner cup 31, the liquid level in the outer cup 32 will continue to drop, causing a portion of the through hole 311 to be exposed above the liquid level in the outer cup 32. At this time, external air will enter the inner cup 31 through the through hole 311, forming bubbles. Before the liquid level in the outer cup 32 drops to be level with the through hole 311, the vacuum pump 41 operates, and the liquid in the outer cup 32 continuously flows into the inner cup 31 through the through hole 311, causing the liquid level in the inner cup 31 to rise and the liquid level in the outer cup 32 to fall. During this process, no bubbles are generated in the inner cup 31. That is, the point at which the liquid level in the outer cup 32 drops to be level with the through hole 311 is the dividing point between the generation of bubbles and the absence of bubbles in the inner cup 31.

[0058] Thus, through the intermittent operation of the vacuum pump 41, combined with the exposure state of the through-hole 311 connecting the inner cup 31 and the outer cup 32 according to the liquid level change, the three steps of negative pressure water absorption and material wetting are automatically completed: gas entering the liquid to generate bubble impact, and pressure relief gravity reflux. Among them, liquid wetting completes the transfer of liquid and preliminary wetting extraction, establishing the basic concentration field and substance distribution. Bubble disturbance breaks the concentration boundary layer that may be formed, reactivating the mass transfer process, allowing the flavor substances inside the material to be released into the water more quickly and fully, improving the concentration and flavor fullness of the extract. This sequence of wetting first and then disturbance allows each cycle to simultaneously obtain the dual benefits of static soaking and dynamic enhancement.

[0059] In some embodiments of this application, the refrigerator further includes a controller electrically connected to the vacuum pump 41. The controller is configured to perform actions such as... Figure 10 The process is shown below. Figure 10 As shown, the controller is configured to execute Figure 12 The steps are shown. (As indicated) Figure 12 As shown, the controller is configured as follows: Step S1000, determine whether the door 102 is in the closed state.

[0060] In step S1010, if the door 102 is in the closed state, the exhaust fan 41 is controlled to operate alternately in the first operating mode and the second operating mode or in the first operating mode.

[0061] In step S1020, if the door 102 is in the open state, the exhaust fan 41 is controlled to operate in the second operating mode.

[0062] In this configuration, when the connecting joint 42 is connected to the extraction device 3, the connecting joint 42 communicates with the interior of the inner cup 31. The time required for the vacuum pump 41 to draw the liquid from the storage chamber into the inner cup 31, making the liquid level in the outer cup 32 flush with the through hole 311, is T0. The first operating mode is that the vacuum pump 41 operates for a first duration T1 and stops for a first set duration S1, where T1 < T0. The second operating mode is that the vacuum pump 41 operates for a second duration T2 and stops for a second set duration S2, where T2 > T0.

[0063] In the first operating mode, if the first duration T1 < T0, then after the vacuum pump 41 has been operating for the first duration T1, the liquid level in the outer cup 32 is still higher than the through hole 311, so the through hole 311 only serves as a liquid flow channel, and no bubbles are generated in the inner cup 31. In the second operating mode, if the second duration T2 > T0, then after the vacuum pump 41 has been operating for the second duration T2, the liquid level in the outer cup 32 is lower than the through hole 311, and external air enters the inner cup 31 through the through hole 311, generating bubbles. That is, during the operation of the vacuum pump 41 in the first operating mode, no bubbles are generated in the inner cup 31; during the operation of the second operating mode, bubbles are generated in the inner cup 31.

[0064] It should be noted that within multiple cycles operating under the first mode, the first duration T1 can be the same or different in different cycles. For example, if the first mode is operated n times in total, a longer first duration T1 is used in the first n0 cycles, and a shorter first duration T1 is used in the last n-n0 cycles. Similarly, within multiple cycles operating under the second mode, the second duration T2 can be the same or different in different cycles.

[0065] In some embodiments, when the door 102 is closed, the vacuum pump 41 is controlled to operate alternately in a first operating mode and a second operating mode, that is, the vacuum pump 41 is controlled to operate in a way that alternates between generating bubbles and not generating bubbles in the inner cup 31 for extraction. Optionally, when the first operating mode and the second operating mode are alternately operated, the first operating mode is operated first, then the second operating mode is operated, and so on in a cycle. Alternatively, when the first operating mode and the second operating mode are alternately operated, the second operating mode is operated first, then the first operating mode is operated. The first operating mode is operated a total of n times, and the second operating mode is operated a total of m times, where n and m are both positive integers not less than 1. In some embodiments, n=m, and the first operating mode and the second operating mode operate the same number of times. In some embodiments, n and m differ by 1 time. For example, the vacuum pump 41 first operates in the first operating mode, then in the second operating mode, and finally ends in the first operating mode, with the first operating mode operating one more time than the second operating mode.

[0066] In some embodiments, when the door 102 is closed, the vacuum pump 41 is controlled to operate in a first operating mode. During this mode, no bubbles are generated in the inner cup 31 throughout the extraction process to prevent bubble impact from causing the liquid surface to boil and allowing some liquid to enter the vacuum pipe 43. The first duration T1 can be the same or different in different cycles during the operation of the vacuum pump 41 in the first operating mode.

[0067] With the door 102 open, the vacuum pump 41 is controlled to operate in the second mode, which allows the user to observe the bubble extraction process, facilitates the demonstration of bubble extraction in the refrigerator, and allows the user to observe whether the bubble extraction function is working properly.

[0068] Optionally, the door 102 being in the open state means that the opening angle of the door 102 relative to the housing 101 is not less than a preset angle. After the door 102 is opened to the preset angle, the user can see the extraction device 3. Optionally, the preset angle is 10°, that is, when the door 102 is opened by 10° relative to the housing 101, the door 102 is considered to be in the open state.

[0069] In some embodiments of this application, the controller is configured to perform Figure 11 The process is shown below. Figure 11 As shown, in step S1100, it is determined whether the vacuum pump 41 is in the working stage when the door 102 switches from the closed state to the open state.

[0070] In step S1110, if the vacuum pump 41 is in the working stage when the door 102 switches from the closed state to the open state, then control the vacuum pump 41 to continue running until the second working duration T2, so that the vacuum pump 41 switches to the second operating mode.

[0071] In step S1120, if the vacuum pump 41 is in the stopped working stage when the door 102 switches from the closed state to the open state, then control the vacuum pump 41 to work for a third time T3, and then switch to the second operating mode and stop working for a second set time S2, where T3 > T0.

[0072] Typically, the vacuum pump 41 operates for 3 to 4 seconds to generate bubbles inside the inner cup 31. Optionally, the third duration T3 can be 4 seconds, 5 seconds, etc. The third duration T3 can be the same as or different from the second duration T2.

[0073] When the door 102 is opened, the vacuum pump 41 remains running or switches to running mode to display bubble extraction, ensuring that the user can see the bubble extraction demonstration as soon as the door is opened.

[0074] In some embodiments, if the vacuum pump 41 is in the working phase of the first operating mode when the door 102 switches from the closed state to the open state, the vacuum pump 41 is controlled to continue operating until the second working time T2, and then stops operating for the second set working time S2, so that the vacuum pump 41 switches to the second operating mode. If the vacuum pump 41 is in the stopped working phase of the first operating mode when the door 102 switches from the closed state to the open state, the vacuum pump 41 is controlled to start, operate for the third working time, and then stops operating for the second set working time S2, switching to the second operating mode.

[0075] In some embodiments, if the vacuum pump 41 is in the working stage of the second operating mode when the door 102 switches from the closed state to the open state, the vacuum pump 41 is controlled to continue operating according to the original operating mode. If the vacuum pump 41 is in the stopped working stage of the second operating mode when the door 102 switches from the closed state to the open state, and the liquid is in a reflux state, the vacuum pump 41 is controlled to work for a third time T3 to generate bubbles in the inner cup 31, and then it stops working for a second set time S2, resuming the operation of the second operating mode. This ensures both rapid bubble extraction and reduces interference with the second operating mode.

[0076] Please refer to some embodiments of this application. Figure 12 The refrigerator also includes a vacuum storage device 2, which can be detachably installed on the cabinet 101 or the door 102. The docking connector 42 is selectively connected to the vacuum storage device 2 and the extraction device 3.

[0077] In some embodiments, the vacuum storage device 2, the extraction device 3, and the vacuum pump 4 can all be mounted on the door 102, or they can all be mounted on the housing 101. In some embodiments, the vacuum pump 4 is mounted on the door 102, and both the vacuum storage device 2 and the extraction device 3 are mounted on the housing 101; or, one of the vacuum storage device 2 and the extraction device 3 is mounted on the door 102, and the other is mounted on the housing 101. In some embodiments, the vacuum pump 4 is mounted on the housing 101, and both the vacuum storage device 2 and the extraction device 3 are mounted on the door 102; or, one of the vacuum storage device 2 and the extraction device 3 is mounted on the door 102, and the other is mounted on the housing 101.

[0078] Specifically, when the vacuum storage device 2 is connected to the docking joint 42, such as Figure 12 As shown, when the vacuum pump 41 operates, the gas inside the vacuum storage device 2 is extracted, and the gas pressure inside the vacuum storage device 2 decreases. This creates a low-pressure environment in the vacuum storage device 2 that is lower than the ambient atmospheric pressure, so that the stored items are kept in a low-pressure environment, achieving a vacuum preservation effect.

[0079] The connecting joint 42 is selectively connected to the vacuum storage device 2 and the extraction device 3, thereby allowing the vacuum storage device 2 and the extraction device 3 to share a single suction device 4. In other words, a single suction device 4 can simultaneously accommodate the vacuum preservation function of the vacuum storage device 2 and the vacuum extraction function of the extraction device 3. Compared to having separate suction devices 4 for the vacuum storage device 2 and the extraction device 3, this reduces the number of components and lowers the overall material procurement cost, assembly and processing cost, and supply chain management cost of the refrigerator. Furthermore, the shared use of the universal suction device 4 eliminates the need to reserve separate installation space for each function, significantly reducing the volume occupied by non-storage function modules. This allows more space in the cabinet 101 to be allocated to the core refrigeration and freezing compartments of the refrigerator, increasing the effective storage volume of the refrigerator. Simultaneously, it simplifies the structural design of the cabinet 101 and the door 102, reducing the difficulty and cost of structural molding and processing.

[0080] In some embodiments of this application, the air extraction device further includes a pressure response element 45, which is disposed on the air extraction line 43.

[0081] The pressure response element 45 is used to monitor changes in air pressure within the evacuation line 43. The pressure response element 45 can be a pressure sensor or a pressure switch. For example, if the pressure response element 45 is a pressure switch, such as model W63-F002, with an open / reset pressure of 0.78±0.02 atm, when the absolute pressure in the evacuation line 43 is higher than the set value in a non-vacuum state, the pressure switch is activated, and the output signal is low. When the absolute pressure in the evacuation line 43 is lower than the set value in a vacuum state, the pressure switch is deactivated, and the output signal is high. When the vacuum storage device 2 is connected to the docking joint 42, the pump 41 evacuates the vacuum storage device 2. The air pressure in the evacuation line 43 matches the air pressure in the vacuum storage device 2 and gradually decreases, causing the pressure switch to switch from the activated state to the deactivated state, and the output signal to switch from low to high, thus changing the pressure. When the extraction device 3 is connected to the docking joint 42, the vacuum pump 41 operates, the air pressure in the vacuum pipeline 43 fluctuates slightly, the pressure switch is always on, and the output signal of the pressure response element 45 is always high. Alternatively, the pressure response element 45 can also output a high signal when it is on and a low signal when it is off.

[0082] The pressure response element 45 can provide feedback on the pressure change in the air extraction pipeline 43 and transmit it to the controller. The controller receives the output signal of the pressure response element 45 to control the air extraction machine 41 to work or stop.

[0083] The controller is configured to execute Figure 13 The process steps are shown below. Figure 13As shown, in step S1310, based on the received start-up pumping signal, the pumping unit 41 is controlled to operate and the output signal of the pressure response element 45 is acquired. It should be noted that the acquisition of the output signal of the pressure response element 45 can be synchronized with the start-up of the pumping unit 41, or it can be started after the pumping unit 41 has been operating for a certain period of time.

[0084] Step S1320: Determine the type of container that is connected to the docking joint 42 based on the output signal of the pressure response element 45.

[0085] The start signal for venting can be input by the user via operation keys or voice input, or it can be automatically generated by the controller based on the current state of the container.

[0086] Before identifying the container type, the vacuum pump 41 is controlled to run continuously. If the container type connected to the docking joint 42 is identified as the extraction device 3, the controller controls the vacuum pump 41 to run before identifying the container type, so that the liquid in the outer cup 32 enters the inner cup 31, wets the material, and extracts the effective components in the material.

[0087] In some optional embodiments, if the vacuum pump 41 has been operating for a period of time when the type of container connected to the docking joint 42 is determined, and if the type of container connected to the docking joint 42 is determined to be the extraction device 3, and if the vacuum pump 41 is controlled to continue operating for a first duration T1 or a second duration T2, the material components will not be easily released further due to the high concentration of the extractant in the inner cup 31. Therefore, after identifying the container type, when the vacuum pump 41 is controlled to alternate between the first and second operating modes in a preset sequence, the vacuum pump 41 is first stopped for a first set duration S1 or a second set duration S2, so that the high-concentration liquid formed after the material is soaked in the inner cup 31 flows back to the outer cup 32 by gravity to mix with the original liquid in the outer cup 32, breaking the concentration gradient inside the liquid and balancing the concentration in each area of ​​the extraction device 3. Then the vacuum pump 41 is controlled to operate for a first duration T1 or a second duration T2.

[0088] It should be noted that the operation of the vacuum pump 41 is not counted in the number of operations in the first and second operating modes before the container type is identified.

[0089] Based on the output signal of the pressure response element 45, the controller can automatically identify whether the container currently connected to the docking connector 42 is a vacuum storage device 2 or an extraction device 3, achieving reliable container type determination. This eliminates the tedious step of manually selecting or setting the working mode, simplifying the operation process. On the other hand, automatic container type identification also avoids operational errors caused by human judgment mistakes, ensuring that the system can automatically match the correct operating logic regardless of the type of device placed inside, improving the user experience. In this refrigerator, the vacuum pump 41 has already started working before determining the type of container connected to the docking connector 42. It can be seen that the container type determination step is not a redundant pre-step independent of the vacuum preservation and vacuum extraction functions, but is performed simultaneously with the completion of the main functions of the vacuum storage device 2 or the extraction device 3, avoiding the additional time loss caused by the two-step scheme of first completing the identification and then starting the function execution.

[0090] The refrigerator provided in this application embodiment determines that the container connected to the docking joint 42 is the extraction device 3. It controls the vacuum pump 41 to alternate between the first operating mode and the second operating mode in a preset sequence. When the vacuum pump 41 is running in the first operating mode, the inner cup 31 will not generate bubbles. When it is running in the second operating mode, the inner cup 31 will generate bubbles. This can both accelerate the release of material components by using bubbles during the extraction process and reduce the frequency of bubble generation, preventing frequent bubble generation from causing liquid to enter the vacuum pipe 43 and the vacuum pump 41.

[0091] In some embodiments of this application, the pressure response element 45 is a pressure switch. The controller is configured to perform... Figure 14 The steps are shown. (As indicated) Figure 14 As shown, the controller is configured to: in step S1400, based on the received start-up pumping signal, control the pump 41 to work and acquire the output signal of the pressure switch.

[0092] In step S1410, if the output signal of the pressure switch changes within the first judgment period, the container connected to the docking joint 42 is determined to be the vacuum storage device 2.

[0093] In step S1420, if the output signal of the pressure switch does not change within the first judgment period, the container connected to the docking connector 42 is determined to be the extraction device 3.

[0094] Before identifying the container type, the vacuum pump 41 continuously operates to evacuate the vacuum storage device 2, causing the air pressure in the evacuation line 43 to gradually decrease to the trigger value of the pressure switch. That is, if the vacuum pump 41 continuously evacuates the vacuum storage device 2, the output signal of the pressure switch will switch. If the vacuum pump 41 continuously evacuates the extraction device 3, the liquid level in the inner cup 31 rises, and although the pressure in the evacuation line 43 changes, the range of change is limited and will never reach the trigger value of the pressure switch; therefore, the output signal of the pressure switch remains unchanged. For example, if the vacuum storage device 2 is a vacuum box, and the vacuum pump 41 operates for 15 seconds, the output signal of the pressure switch will change (switching from high level to low level or from low level to high level); if the extraction device 3 is connected to the docking connector 42, the output signal of the pressure switch will remain unchanged during the 15 seconds of operation of the vacuum pump 41. Based on this, the controller can determine whether the container connected to the docking connector 42 is the extraction device 3 or the vacuum storage device 2 by checking whether the output signal of the pressure switch changes within the first judgment period. This achieves fully automatic container type identification, eliminating the need for users to manually select the working mode or to add additional manual or automatic identification hardware such as mechanical contact recognition or image recognition. Users only need to complete the physical docking of the docking connector 42 with the target container (vacuum storage device 2 or extraction device 3) and input the start evacuation command. The controller can then automatically identify and determine the container type, simplifying the operation process and improving the product's ease of use and user experience.

[0095] The time required for the vacuum switch output signal to change varies depending on whether the vacuum box or vacuum bag is evacuated by the vacuum pump 41. Typically, the vacuum box requires 15 seconds to change the pressure switch output signal, while vacuum bags of different sizes generally require no more than 30 seconds. Therefore, the initial judgment time is no less than 15 seconds to ensure the refrigerator can automatically identify the vacuum box. Optionally, to ensure both the vacuum box and vacuum bag are identified, the initial judgment time can be 30-35 seconds. For example, the initial judgment time can be 35 seconds or 30 seconds, or any value between 30 and 35 seconds, such as 31 seconds or 32 seconds.

[0096] The refrigerator provided in this application embodiment has a pressure response element 45 that is a pressure switch. The type of container connected to the docking connector 42 can be identified by whether the output signal of the pressure switch changes within a first judgment period. The judgment logic is simple.

[0097] In other embodiments of this application, the pressure response element 45 is a pressure sensor. For example... Figure 15 As shown, the controller is configured to execute Figure 15 The steps are shown. (As indicated) Figure 15As shown, the controller is configured to: in step S1500, based on the received start-up pumping signal, control the pump 41 to work and acquire the output value of the pressure sensor.

[0098] S1510, if the output value of the pressure sensor reaches the first set pressure within the second judgment period, then the container connected to the docking joint 42 is determined to be the vacuum storage device 2.

[0099] S1520, if the output value of the pressure sensor does not reach the first set pressure within the second judgment period, then the container connected to the docking joint 42 is determined to be the extraction device 3.

[0100] Typically, the pressure switch output signal changes after the vacuum box is evacuated by the vacuum pump 41 for 15 seconds, while the pressure switch output signal changes after the vacuum bag is evacuated by the vacuum pump 41 for no more than 30 seconds. Therefore, the second judgment time is no less than 15 seconds to ensure that the refrigerator can automatically recognize the vacuum box. Optionally, to ensure that both the vacuum box and the vacuum bag can be recognized, the second judgment time is 30 to 35 seconds. For example, the second judgment time is 35 seconds or 30 seconds, or any value between 30 and 35 seconds, such as 31 seconds or 32 seconds.

[0101] Optionally, the first set pressure is approximately -0.01 MPa below standard atmospheric pressure or another pressure value below standard atmospheric pressure. For example, the first set pressure is the target pressure expected to be achieved when evacuating the vacuum storage device 2. Alternatively, the first set pressure may fluctuate by a preset value relative to the target pressure. If the docked container type is the extraction device 3, the pressure in the evacuation line 43 will not drop to the first set pressure. Therefore, the type of container docked to the docking connector 42 can be determined based on whether the output value of the pressure sensor reaches the first set pressure.

[0102] The above technical solution, by setting a pressure sensor and using a controller to monitor and judge the air pressure in the suction pipe 43, can automatically identify whether the container currently connected to the docking joint 42 is a vacuum storage device 2 or an extraction device 3, thus achieving reliable determination of the container type. This eliminates the need for users to manually select or set the working mode, simplifying the operation process.

[0103] In some embodiments of this application, the controller is configured to perform as follows: Figure 13 The process is shown below. Figure 13 As shown, after steps S1310 and S1320, the following steps are also included: In step S1610, if it is determined that the container connected to the docking joint 42 is a vacuum storage device 2, then the pump 41 is controlled to continue running for a first preset time and then stop working.

[0104] When it is determined that the container connected to the docking joint 42 is a vacuum storage device 2, the vacuum pump 41 has been operating for a second duration T2, during which time the air pressure in the vacuum pipe 43 has decreased by a certain value. The first preset duration is 0 seconds or a non-zero value. In some embodiments, the first preset pressure set by the container type is identified as the target air pressure, or the trigger value of the pressure switch is consistent with the target air pressure; in this case, the first preset duration is 0 seconds. That is, after the determination result is obtained, the controller controls the vacuum pump 41 to stop working, and the pressure value in the vacuum storage device 2 meets the target air pressure. In some other embodiments, the first preset pressure set by the container type is identified as lower than the target air pressure, or the trigger value of the pressure switch is lower than the target air pressure; the first preset duration is a non-zero value such as 1 second, 2 seconds, or 3 seconds. After it is determined that the container connected to the docking joint 42 is a vacuum storage device 2, the controller controls the vacuum pump 41 to continue running for the first preset duration, so that the air pressure in the vacuum pipe 43 further decreases to the target air pressure.

[0105] The refrigerator provided in this application embodiment has already had its vacuum pump 41 working for a certain period of time before the container type determination result is obtained, completing the initial vacuum depressurization of the vacuum storage device 2; when the identification and determination result is obtained, the controller controls the vacuum pump 41 to continue running for a first preset time based on the already achieved negative pressure state, without having to start vacuum depressurization from zero, which can shorten the total time for the vacuum storage device 2 to reach the target pressure, and establish a low-oxygen vacuum preservation environment for food more quickly, thereby improving the vacuum preservation effect.

[0106] The following problems exist when using the reusable vacuum pump 4: When the inner cup 31 of the extraction device 3 contains dense, finely ground material (such as finely ground coffee powder), the material temporarily blocks the air passage during the initial vacuuming stage. A small amount of gas is rapidly extracted from the vacuum pipe 43, causing a sudden drop in air pressure. This changes the output signal of the pressure response element 45, leading to misjudgment and consequently causing the vacuum pump 41 to mismatch its operating process. Furthermore, because the gas capacity in the vacuum pipe 43 is very small, in the early stages of vacuum pump 41 operation, before the sealing valve of the vacuum storage device 2 (such as the vacuum box) is opened, or before the water level in the inner cup 31 of the extraction device 3 has risen, the instantaneous negative pressure in the vacuum pipe 43 will trigger significant fluctuations in the output signal of the pressure response element 45. For example, if the pressure response element 45 is a pressure switch, the pressure switch may malfunction. If the pressure response element 45 is a pressure sensor, the output value of the pressure sensor may exceed the first set pressure due to large fluctuations. That is, during the initial period of operation of the vacuum pump 41, the output signal of the pressure response element 45 will fluctuate and repeatedly switch on and off, and it will take about 1 to 2 seconds for the signal to stabilize. If the output signal of the pressure response element 45 is obtained during the fluctuating process, misjudgment is likely to occur.

[0107] Therefore, in some specific embodiments of this application, the controller is configured to begin acquiring the output signal of the pressure response element 45 when the pump 41 has been operating for a preset stable period. By setting the timing control logic of the preset stable period, the controller only begins to acquire the output signal of the pressure response element 45 and make a judgment after the pump 41 has been operating for the preset stable period and the air pressure in the pumping pipeline 43 has been stabilized, thereby reducing the risk of misjudgment.

[0108] Optionally, the preset stabilization time is 4s to 8s. For example, the preset stabilization time can be any value between 4s and 8s, such as 4s, 8s, 5s, or 6s. The preset stabilization time of 4s to 8s can fully cover the instantaneous pressure drop phase of the initial evacuation. Even if the dense texture of the finely ground material in the inner cup 31 causes temporary blockage of the air passage, resulting in a rapid drop in air pressure in the evacuation pipe 43 at the beginning of the evacuation, within the preset stabilization time, relying on the inherent structural characteristics of the outer cup 32 being connected to the outside atmosphere, outside air can continuously replenish the outer cup 32 under the action of pressure difference, carrying the liquid in the outer cup 32 through the bottom material layer of the inner cup 31, opening up the air passage between the inner cup 31 and the outer cup 32; thereby causing the air pressure in the inner cup 31 to quickly rise and stabilize in the weak negative pressure range, with a limited degree of negative pressure and the air pressure can be self-balanced, which is significantly different from the deep low negative pressure state maintained by the sealed cavity of the vacuum storage device 2. This control logic does not require additional identification hardware. It can avoid problems such as instantaneous pressure fluctuations, material blockage, and output signal jitter during the initial stage of vacuuming by using only timing control and steady-state gas pressure characteristic identification. It can achieve high accuracy in distinguishing between vacuum storage device 2 and extraction device 3, and avoid problems such as refrigerator malfunction and abnormal operation caused by mismatch of vacuum pump 41 operating mode.

[0109] In designs lacking a pressure relief valve 44 or with a delayed opening of the pressure relief valve 44, when the extraction device 4 stops working, the extraction pipeline 43 and the inner cup 31 remain under negative pressure. This residual negative pressure will draw in the liquid in the inner cup 31, and the liquid needs to overcome the negative pressure before it can begin to flow, preventing the liquid from immediately flowing back downwards, resulting in a time window for the backflow initiation. In some embodiments of this application, the extraction device 3 includes a pressure relief valve 44, which is installed on the extraction pipeline 43 for depressurizing the extraction pipeline 43, and the controller is electrically connected to the pressure relief valve 44. Specifically, as shown in... Figure 6 As shown, the extraction pipeline 43 has branches, and the pressure relief valve 44 is located at the end of the branch. The pressure relief valve 44 has a branch that is connected to the atmosphere.

[0110] In some specific embodiments of this application, such as Figure 17 As shown, the controller is configured to execute Figure 17The process is shown. After steps S1310 and S1320, the process further includes: step S1710, if it is determined that the container connected to the docking joint 42 is the extraction device 3, then the pressure relief valve 44 is controlled to be in the open state when the pump 41 stops working, and in the closed state when the pump 41 is working.

[0111] When the vacuum pump 41 is operating, the pressure relief valve 44 is closed, and the vacuum pipeline 43 is not connected to the atmosphere, so that the extraction device 3 can perform extraction. During the extraction process, the opening of the pressure relief valve 44 is closely related to the stopping of the vacuum pump 41. At the moment the vacuum stops, the negative pressure in the inner cup 31 is broken by the pressure relief valve 44. Outside air rushes into the inner cup 31, instantly balancing the air pressure in the inner cup 31 and the outer cup 32, causing the liquid in the inner cup 31 to immediately start reflux under the action of gravity. This immediate stop-and-go mechanism eliminates reflux delay, increases the number of extraction cycles that can be completed per unit time, and significantly improves the overall extraction efficiency.

[0112] After the vacuum pump 41 stops working, a small amount of extract droplets may remain on the inner wall of the vacuum pipe 43. Without a pressure relief valve 44, when the vacuum pump 41 is restarted, these residual liquids may be directly sucked into the vacuum pump 41, and long-term accumulation can lead to bacterial growth, odor, and even damage to the vacuum pump 41. At the same time, the dirt formed by the dried extract droplets in the vacuum pipe 43 will also affect the purity of the subsequent extraction device 3. When the pressure relief valve 44 is opened, outside air enters the vacuum pipe 43, creating an airflow purging effect—the flowing air can blow the residual liquid adhering to the inner wall of the vacuum pipe 43 back to the extraction device 3 or discharge it, reducing the residence time of the residual liquid in the vacuum pipe 43, keeping the vacuum pipe 43 relatively dry and clean, avoiding residual liquid contamination of the vacuum pump 41, extending the life of components, and ensuring the hygiene and safety of the extraction device 3 for the next extraction.

[0113] Furthermore, during multiple extraction cycles, fine material particles easily accumulate at the through-hole 311. Long-term accumulation can cause localized blockage of the through-hole 311, hindering normal liquid reflux and resulting in a large amount of high-concentration extract remaining inside the inner cup 31, leading to a waste of flavor compounds. In the above technical solution, after the suction stops, outside air is rapidly introduced into the inner cup 31 through the suction pipe 43, forming a top-down directional airflow. This airflow disturbs the upper surface of the material, preventing material compaction and creating a slight positive pressure above the liquid surface. This pressure, combined with the liquid level difference between the inner cup 31 and the outer cup 32, forms a gas-assisted reflux driving force. By pressurizing the top to assist drainage, the flow resistance caused by slight blockage of the through-hole 311 can be effectively overcome, smoothly pushing the liquid out of the inner cup 31. This ensures that after each extraction cycle, the extract from the inner cup 31 can fully reflux to the outer cup 32, reducing concentrated residue and improving the overall extraction efficiency and flavor utilization.

[0114] Furthermore, during multiple extraction cycles, the inner cup 31 is under negative pressure during the evacuation phase, drawing in liquid; during the depressurization phase, the inner cup 31 returns to normal pressure, allowing liquid to flow back, and the material undergoes repeated pressure changes. If the depressurization process is slow and the pressure changes are gradual, the physical disturbance to the material is limited. In this design, when the depressurization valve 44 opens, the pressure in the inner cup 31 recovers from negative pressure to normal pressure in a very short time, creating a pressure surge. When this surge acts on the material layer immersed in the liquid, it produces a slight vibration effect. The material particles slightly shift under the sudden pressure change, altering their relative positions and loosening previously tightly packed areas. This pressure pulse occurs repeatedly in each cycle, continuously disrupting the stable structure of the material layer, allowing the liquid to more fully penetrate the material in subsequent cycles, thus strengthening the physical disturbance mechanism of the extraction process.

[0115] The refrigerator provided in this application embodiment has a pressure relief valve 44 that opens simultaneously when the vacuum pump 41 stops working. This ensures that the air pressure inside the vacuum pipe 43 and the inner cup 31 is reset to normal pressure after each operation of the vacuum pump 41, eliminating the reflux window period, achieving immediate stop and return, ensuring effective use of the standing time, stabilizing the mass transfer concentration gradient, and improving the extraction cycle frequency and overall extraction efficiency.

[0116] If the container connected to the docking joint 42 is determined to be the vacuum storage device 2, the controller controls the pressure relief valve 44 to open for a fourth time when the pump 41 stops working, so as to separate the docking joint 42 from the vacuum storage device 2.

[0117] This application embodiment provides a refrigerator, wherein the controller is configured to execute... Figure 18 The process steps are shown below. Figure 18 As shown.

[0118] Step S1810: Based on the received start-up pumping signal, control the pumping machine 41 to work; Step S1820: When the vacuum pump 41 has been working for a preset stable time, the output signal of the pressure response element 45 is acquired. Step S1830: Determine the type of container that is connected to the docking joint 42 based on the output signal of the pressure response element 45; Step S1840: If it is determined that the container connected to the docking joint 42 is the extraction device 3, then the vacuum pump 41 is controlled to operate alternately in the first operating mode and the second operating mode or in the first operating mode when the door 102 is closed; and the vacuum pump 41 is controlled to operate in the second operating mode when the door 102 is open. In step S1850, if it is determined that the container connected to the docking joint 42 is a vacuum storage device 2, then the pump 41 is controlled to continue running for a first preset time and then stop working.

[0119] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A refrigerator, characterized in that, include: The container has a storage compartment; The door is used to open or close the storage room; An extraction device is detachably installed on the door or the housing; the extraction device includes an inner cup and an outer cup, the outer cup having a liquid storage chamber and communicating with the external environment; the inner cup is at least partially located inside the outer cup and has a through hole communicating with the interior of the outer cup; An air extraction device is installed on the door or the box. The air extraction device includes a docking joint, an air extraction machine, and an air extraction pipeline. One end of the air extraction pipeline is connected to the air extraction machine, and the other end is connected to the docking joint. The docking joint is used to connect to the extraction device so that the air extraction machine can extract air from the inner cup. The controller, electrically connected to the exhaust fan, is configured to: if the door is in a closed state, control the exhaust fan to operate alternately in a first operating mode and a second operating mode, or to operate in the first operating mode. If the door is in the open state, the exhaust fan is controlled to operate in the second operating mode; The time required for the pump to draw the liquid in the storage chamber into the inner cup so that the liquid level in the outer cup is flush with the through hole is T0; the first operating mode is that the pump works for a first duration T1 and stops working for a first set duration S1, where T1 < T0; the second operating mode is that the pump works for a second duration T2 and stops working for a second set duration S2, where T2 > T0.

2. The refrigerator as described in claim 1, characterized in that, The controller is configured to: if the air extractor is in operation when the door switches from the closed state to the open state, control the air extractor to continue operating until the second operating duration T2, so that the air extractor switches to the second operating mode; If the air extractor is in a stopped working phase when the door switches from the closed state to the open state, then the air extractor is controlled to work for a third time T3, and then switched to the second operating mode and stopped working for a second set time S2, where T3 > T0.

3. The refrigerator as described in claim 1 or 2, characterized in that, The refrigerator also includes a vacuum storage device, which is detachably installed on the door or the cabinet, and the docking joint is selectively connected to the vacuum storage device or the extraction device.

4. The refrigerator as described in claim 3, characterized in that, The air extraction device further includes a pressure response element disposed on the air extraction pipeline, and the controller is configured to: Based on the received start-up pumping signal, control the pumping machine to work and acquire the output signal of the pressure response element; The type of container that is connected to the docking joint is determined based on the output signal of the pressure response element.

5. The refrigerator as described in claim 4, characterized in that, The pressure response element is a pressure switch; the determination of the container type connected to the docking joint based on the output signal of the pressure response element includes: If the output signal of the pressure switch changes within the first judgment period, the container connected to the docking joint is determined to be a vacuum storage device. If the output signal of the pressure switch does not change within the first judgment period, then the container connected to the docking joint is determined to be an extraction device.

6. The refrigerator as described in claim 4, characterized in that, The pressure response element is a pressure sensor, and the determination of the container type connected to the docking joint based on the output signal of the pressure response element includes: If the output value of the pressure sensor reaches the first set pressure within the second judgment period, then the container connected to the docking joint is determined to be a vacuum storage device. If the output value of the pressure sensor does not reach the first set pressure within the second judgment period, then the container connected to the docking joint is determined to be an extraction device.

7. The refrigerator as described in claim 3, characterized in that, The controller is configured to: If it is determined that the container connected to the docking joint is a vacuum storage device, then the pump will continue to run for a first preset time and then stop working.

8. The refrigerator as described in claim 4, characterized in that, The controller is configured to begin acquiring the output signal of the pressure response element when the pump has been operating for a preset stable period of time.

9. The refrigerator as described in claim 1 or 2, characterized in that, The air extraction device further includes a pressure relief valve, which is installed on the air extraction pipeline. The controller is electrically connected to the pressure relief valve and is configured to: The pressure relief valve is controlled to be open when the air pump stops working and closed when the air pump is working.

10. The refrigerator as described in claim 1, characterized in that, The extraction device also includes a cup lid and a filter element. The cup lid covers the mouths of the inner cup and the outer cup. The filter element is detachably installed inside the inner cup. The filter element has a limiting protrusion on the side facing the cup lid.

Images