Refrigerator

Abstract

The application provides a refrigerator, which comprises a cabinet, a door body, a first low-pressure storage unit and a second low-pressure storage unit which are detachably connected with the door body, and an air extraction device; wherein the height of the second low-pressure storage unit is less than the height of the first low-pressure storage unit; the air extraction device comprises an air extraction connector for being connected with the first low-pressure storage unit or the second low-pressure storage unit, and an air extraction pump connected with the air extraction connector and used for extracting air from the first low-pressure storage unit or the second low-pressure storage unit; when the first low-pressure storage unit is installed on a first mounting position of the door body, the air extraction connector is matched with the first low-pressure storage unit and used for extracting air from the first low-pressure storage unit; when the second low-pressure storage unit is installed on a second mounting position of the door body, the air extraction connector is matched with the second low-pressure storage unit and used for extracting air from the second low-pressure storage unit; the refrigerator can consider different volumes of the low-pressure storage units and various use scenarios, and meet the diversified use requirements of customers.

Description

Technical Field

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

[0002] As consumers demand higher quality fresh food, their requirements for refrigerators are also increasing. They need refrigerators with better configurations and more powerful functions, especially hoping that the stored fresh food can have a longer shelf life to ensure the freshness of the ingredients and prevent the loss of nutrients. To better store food, vacuum devices have been developed for refrigerator doors. These devices remove oxygen from the inside of the vacuum food storage container, preventing food spoilage and ensuring freshness.

[0003] Traditional vacuum sealing devices installed on the door can only be used with one type of vacuum food storage container of a fixed height because the vacuum sealing connector and the tray for placing the vacuum food storage container are fixed in position.

[0004] When users use vacuum food storage containers in their daily lives, they cannot use vacuum food storage containers with volumes that match the types and sizes of the food. They can only use a vacuum food storage container with a fixed volume, which reduces the volume utilization rate of the food storage container. Summary of the Invention

[0005] This application provides a refrigerator that can accommodate low-pressure storage units of different volumes and various usage scenarios to meet diverse customer needs.

[0006] In a first aspect, a refrigerator is provided, comprising: The container defines a storage compartment with an access opening; The door is used to open or close the pick-up and drop-off port; A first low-pressure storage unit and a second low-pressure storage unit are detachably connected to the door; wherein the height of the second low-pressure storage unit is less than the height of the first low-pressure storage unit. An air extraction device is disposed on the door body; the air extraction device includes: An air extraction connector is used to connect to either the first low-pressure storage unit or the second low-pressure storage unit. An air pump, which is connected to the air extraction connector, is used to extract air from the first low-pressure storage unit or the second low-pressure storage unit. When the first low-pressure storage unit is installed at the first mounting position on the door, the air extraction connector is adapted to the first low-pressure storage unit and is used to extract air from the first low-pressure storage unit. When the second low-pressure storage unit is installed in the second mounting position on the door, the air extraction connector is adapted to the second low-pressure storage unit and is used to extract air from the second low-pressure storage unit.

[0007] The above technical solution, through a design with a fixed and variable installation position of the vacuum connector, successfully achieves compatibility with low-pressure storage units of various sizes on the door using a unified vacuum system. It provides users with a highly flexible, convenient, cost-effective, and scalable vacuum preservation solution, improving the refrigerator's preservation capabilities and space utilization efficiency.

[0008] In some embodiments, the refrigerator further includes: The third low-pressure storage unit is detachably connected to the door. The second low-pressure storage unit and the third low-pressure storage unit are stacked. When one of the second low-pressure storage unit and the third low-pressure storage unit located on the lower side is installed in the first mounting position on the door body, the air extraction connector is adapted to the other of the second low-pressure storage unit and the third low-pressure storage unit located on the upper side for air extraction.

[0009] The above technical solution combines two low-pressure storage units (a second low-pressure storage unit and a third low-pressure storage unit) by stacking them together. One low-pressure storage unit increases the height of the other low-pressure storage unit, thereby enabling the extraction of air from the low-height low-pressure storage device from a large-distance installation position, thus improving space utilization efficiency.

[0010] In some embodiments, the height at which the second low-pressure storage unit and the third low-pressure storage unit are stacked is equal to the height of one of the first low-pressure storage units.

[0011] The above technical solution, through a precise and standardized installation position and height (first installation position), enables physical interchangeability and compatibility of low-pressure storage modules of different volumes (whether single or in combination). This not only provides users with flexibility and convenience in using low-pressure storage devices, but also reduces manufacturing complexity through standardized design.

[0012] In some embodiments, the second low-pressure storage unit and the third low-pressure storage unit have the same height.

[0013] In the above technical solution, the second and third low-pressure storage units are designed as components with identical heights; they can be completely identical components. During manufacturing, only one set of molds needs to be developed and one type of inventory needs to be managed to produce all the housings required for the two functional modules, maximizing the versatility of parts and saving costs.

[0014] Users can choose to use a large-capacity low-pressure storage unit, or two smaller-capacity basic low-pressure storage units (a second and a third low-pressure storage unit stacked together), or even a single small-capacity basic low-pressure storage unit, as needed. This configuration, offering two sizes of low-pressure storage units with the smaller unit being completely universal, aligns with human cognitive habits and is simple and intuitive.

[0015] In some embodiments, the door body is provided with a first connector; the first connector is located below the air extraction connector; The refrigerator also includes a support tray, which is detachably connected to the first connector; When the support tray is installed on the door body via the first connector, the first low-pressure storage unit is installed on the support tray, and the first low-pressure storage unit is located at the first installation position on the door body.

[0016] In the above technical solution, the support tray, as a multifunctional adapter component, not only matches the first connector but also provides a raised and stable load-bearing surface for the first low-pressure storage unit (or the second or third low-pressure storage unit). Furthermore, as an independent load-bearing structure, the support tray can better distribute the weight (whether it is the first low-pressure storage unit itself or the heavy objects inside it) onto the door, improving the overall load-bearing capacity and structural stability at that location.

[0017] In some embodiments, the door body is provided with a second connector; the second connector is located below the air extraction connector and on the side of the first connector close to the air extraction connector; The support tray is detachably connected to the second connector; When the support tray is installed on the door body via the second connector, the second low-pressure storage unit is installed on the support tray, and the second low-pressure storage unit is located at the second mounting position on the door body.

[0018] In the above technical solution, the height reference of the same support tray changes by selecting different connectors (first connector or second connector). This change precisely compensates for the height difference between the first and second low-pressure storage units. This ensures that, despite the different heights of the two low-pressure storage units, after being lifted by the support tray, their air extraction ports reach the same three-dimensional coordinate point—the position where they connect with the air extraction connector.

[0019] In some embodiments, the door includes an inner liner that is close to the housing when the door is closed; The inner liner of the door includes: The inner wall of the door is opposite to the opening when the door is closed; The first inner wall extends along the height of the door body and is located on the side of the inner wall of the door body near the pivot axis of the door body; The second inner wall extends along the height of the door body and is located on the side of the inner wall of the door away from the pivot axis of the door body; The air extraction connector is located on the inner wall of the door; The two first connectors are respectively disposed on the first inner sidewall and the second inner sidewall; The two second connectors are respectively disposed on the first inner sidewall and the second inner sidewall; The first, second, or third low-pressure storage unit is provided with fittings at both ends of the unit, and the fittings are detachably connected to the first or second connector on the corresponding side.

[0020] The above technical solution forms a U-shaped rigid frame with the inner wall of the door and two inner side walls (the first inner side wall and the second inner side wall), and multi-level connectors are symmetrically arranged on both sides to form a stable and precise double-sided symmetrical force-sealing installation structure, which solves the problem of stable installation of modular components on the moving door.

[0021] In some embodiments, the first connector or the second connector includes: The first protrusion is disposed on the first inner sidewall and the second inner sidewall; The first gap is defined by the first protrusion and the inner wall of the door; The assembly includes: The first card block is installed within the first gap; The first groove has its opening facing away from the air extraction connector; the first protrusion is installed in the first groove.

[0022] The above technical solution combines the installation and locking actions into a single installation action through the cooperation of the first protrusion and the first groove, and the cooperation of the first gap and the first locking block. After installation, as long as it is not pushed upwards, the low-pressure storage unit will not fall off due to gravity or the inertia of normal door opening and closing, achieving automatic anti-detachment and a high safety factor. This provides reliability against various forces in daily use without any additional operation or complex components. In addition, the purely mechanical structure offers far greater reliability than complex mechanisms that require additional locking buttons.

[0023] In some embodiments, the size of the first protrusion is denoted as the first size D along the direction from the end of the first inner sidewall away from the inner wall of the door to the inner wall of the door; Along the direction from the top to the bottom of the door, the first dimension D gradually increases.

[0024] In the above technical solution, when the user installs the low-pressure storage unit, the first groove on the low-pressure storage unit preferentially contacts the smallest top of the first protrusion located on the door, making it easier for the first protrusion to enter the first groove, resulting in less resistance during the initial installation and facilitating positioning. As the low-pressure storage unit continues to move downwards, the size of the first protrusion gradually increases along the direction perpendicular to the inner wall of the door, further defining the position of the first groove relative to the first protrusion, thereby enabling the low-pressure storage unit to be precisely installed on the door.

[0025] Secondly, a refrigerator is provided, comprising: The container defines a storage compartment with an access opening; The door is used to open or close the pick-up and drop-off port; The first low-pressure storage unit and the second low-pressure storage unit are detachably connected to the door body; An air extraction device is disposed on the door body; the air extraction device includes: An air extraction connector is used to connect to either the first low-pressure storage unit or the second low-pressure storage unit. An air pump, which is connected to the air extraction connector, is used to extract air from the first low-pressure storage unit or the second low-pressure storage unit. When the first low-pressure storage unit is installed at the first mounting position on the door, the air extraction connector is adapted to the first low-pressure storage unit and is used to extract air from the first low-pressure storage unit; the plane where the bottom end face of the first low-pressure storage unit is located is denoted as the first plane; When the second low-pressure storage unit is installed in the second mounting position on the door, the air extraction connector is adapted to the second low-pressure storage unit and is used to extract air from the second low-pressure storage unit; the plane where the bottom end face of the second low-pressure storage unit is located is denoted as the second plane; The first plane is located on the side of the second plane away from the air extraction connector.

[0026] The above technical solution compensates for the height differences of low-pressure storage units by positioning the bottom mounting planes of different sizes at different positions on the door, thereby ensuring that the air extraction ports at the top of the low-pressure storage units can all reach the same position to mate with the fixed air extraction connector, thus achieving a precise and sealed connection between the low-pressure storage units and the fixed air extraction connector. Attached Figure Description

[0027] Figure 1 An exemplary schematic diagram of the overall structure of a refrigerator according to some embodiments is shown; Figure 2 An exploded view of the door, low-pressure storage unit, and tray is shown as an example according to some embodiments; Figure 3 An exemplary schematic diagram of the structure during evacuation of the first low-pressure storage unit according to some embodiments is shown; Figure 4 An exemplary schematic diagram of a structure is shown from another perspective when the first low-pressure storage unit is evacuated according to some embodiments; Figure 5 An exemplary schematic diagram of the structure during evacuation of the second low-pressure storage unit according to some embodiments is shown; Figure 6 An exemplary schematic diagram of a structure is shown from another perspective when the second low-pressure storage unit is evacuated according to some embodiments; Figure 7 An exemplary schematic diagram is shown of the structure when the second extraction unit is evacuated in a stacked state of the second low-pressure storage unit and the third low-pressure storage unit, according to some embodiments. Figure 8 An exemplary schematic diagram is shown from another perspective of the structure when the second extraction unit is evacuated in a stacked state of the second low-pressure storage unit and the third low-pressure storage unit, according to some embodiments. Figure 9 Exemplary schematic diagrams of the structure of a first connector and a second connector according to some embodiments are shown; Figure 10 An exemplary schematic diagram of the first and second connectors according to some embodiments is shown from another perspective. Figure 11 An exemplary schematic diagram of the first and second connectors according to some embodiments is shown from another perspective. Figure 12 An exemplary schematic diagram of a pallet structure according to some embodiments is shown; Figure 13 An example is shown Figure 12 A magnified view of a portion of region A in the middle.

[0028] The refrigerator comprises: a refrigerator body 1; a door body 2; a door liner 21; a door inner wall 21a; a first inner side wall 211; a second inner side wall 212; a first low-pressure storage unit 31; a second low-pressure storage unit 32; a third low-pressure storage unit 33; an exhaust connector 4; a first connector 51; a second connector 52; a first protrusion 5a; a first gap 5b; a second protrusion 5c; an assembly 6; a first groove 6a; a first locking block 6b; and a support tray 7. Detailed Implementation

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] Please refer to Figures 1-2 The refrigerator 100 includes a cabinet 1, which defines a storage compartment. The front end of the storage compartment has a retrieval opening for placing or retrieving stored items into or from the storage compartment.

[0034] The refrigerator 100 includes a door 2, which is connected to the cabinet 1 to open and close the storage compartment. The door 2 is rotatably connected to the cabinet 1 to open or close the access port.

[0035] The refrigerator 100 includes a refrigeration system that supplies cold air to the storage compartment to regulate the temperature inside the storage compartment and create a low-temperature storage environment suitable for food preservation.

[0036] Please refer to some embodiments of this application. Figures 3-4 The refrigerator 100 includes a first low-pressure storage unit 31. The first low-pressure storage unit 31 is detachably connected to the door 2.

[0037] Please refer to Figures 5-6The refrigerator 100 includes a second low-pressure storage unit 32. The second low-pressure storage unit 32 is detachably connected to the door 2. The height of the second low-pressure storage unit 32 is less than the height of the first low-pressure storage unit 31. This technical solution, by setting the heights of the first low-pressure storage unit 31 and the second low-pressure storage unit 32 to be different, results in different volumes for the two low-pressure storage units, allowing users to conveniently select the low-pressure storage unit with the required volume according to their needs.

[0038] Please refer to Figures 2-6 The refrigerator 100 includes a vacuum device. The vacuum device is used to extract air from either the first low-pressure storage unit 31 or the second low-pressure storage unit 32, thereby creating a low-pressure environment below atmospheric pressure within either unit. The vacuum device is located on the door 2. The vacuum device includes a vacuum connector 4, which is connected to the first low-pressure storage unit 31 or the second low-pressure storage unit 32. The vacuum device also includes a vacuum pump, which is connected to the vacuum connector 4 and used to extract air from either the first low-pressure storage unit 31 or the second low-pressure storage unit 32. In this technical solution, the vacuum device is located on the door 2, and the vacuum connector 4 is positioned in a fixed position relative to the door 2 during vacuuming.

[0039] In some embodiments of this application, when the first low-pressure storage unit 31 is installed at a first mounting position on the door 2, the air extraction connector 4 is adapted to the first low-pressure storage unit 31 for evacuating air from the first low-pressure storage unit 31. When the second low-pressure storage unit 32 is installed at a second mounting position on the door 2, the air extraction connector 4 is adapted to the second low-pressure storage unit 32 for evacuating air from the second low-pressure storage unit 32.

[0040] In the above technical solution, the first low-pressure storage unit 31 and the second low-pressure storage unit 32 are direct containers for vacuum storage. The height of the second low-pressure storage unit 32 is smaller than that of the first low-pressure storage unit 31, indicating that the positions of the evacuation connectors 4 of the two low-pressure storage units are different along the Z-axis (height direction). Multiple low-pressure storage units of different heights can be adapted to one evacuation connector 4, allowing for evacuation of these units. Users can choose to install large (first low-pressure storage unit 31) or small (second low-pressure storage unit 32) storage units, or a combination thereof, according to their current needs. Users are no longer limited by the size of a single low-pressure storage unit and can freely combine the low-pressure storage units on the door 2 according to the type and quantity of food. For example, a large unit can be used after a large weekend shopping trip, while a smaller unit can be used for daily use. This achieves on-demand allocation and customization of the storage space on the door 2, meeting diverse storage needs.

[0041] Furthermore, the evacuation connector 4 is fixed to the door 2, and it needs to be able to successfully mate and seal with low-pressure storage units installed at different heights (first mounting position and second mounting position). The technical solution of this application does not involve moving the connector, but rather defines different "mounting positions" for boxes of different heights, ensuring that the interfaces of all boxes reach the same mating plane. Multiple low-pressure storage units share a single high-performance evacuation pump, avoiding the burden and reliability issues of multiple low-power pumps. Only one power supply and control system is needed, resulting in high integration. Only one evacuation device (evacuation pump + evacuation connector 4) needs to be developed and manufactured to evacuate low-pressure storage units of various sizes, significantly reducing assembly complexity. Moreover, if one evacuation pump fails, only one needs to be replaced, making maintenance convenient and cost-effective. Users can also expand functionality by purchasing low-pressure storage units of different heights, without needing to purchase the entire system.

[0042] The above technical solution, through a design of fixed and variable installation position of the air extraction connector 4, successfully achieves compatibility with low-pressure storage units of various sizes on the door 2 using a unified air extraction system. It provides users with a highly flexible, convenient, cost-effective and scalable vacuum preservation solution, improving the preservation capability and space utilization efficiency of the refrigerator 100.

[0043] Please refer to some embodiments of this application. Figure 2 and Figure 6 When the first low-pressure storage unit 31 is installed in the first mounting position on the door 2, the plane containing the bottom end face of the first low-pressure storage unit 31 is denoted as the first plane P1. When the second low-pressure storage unit 32 is installed in the second mounting position on the door 2, the plane containing the bottom end face of the second low-pressure storage unit 32 is denoted as the second plane P2. The first plane P1 is located on the side of the second plane P2 furthest from the exhaust connector 4. This technical solution compensates for the height differences of low-pressure storage units of different sizes by positioning their bottom mounting planes at different positions on the door 2, thereby ensuring that the exhaust ports at the top of the low-pressure storage units can all reach the same position to mate with the fixed exhaust connector 4, achieving a precise and sealed connection between the low-pressure storage unit and the fixed exhaust connector 4.

[0044] Please refer to some embodiments of this application. Figures 7-8 The refrigerator 100 also includes a third low-pressure storage unit 33 that is detachably connected to the door 2. The air extraction device can extract air from the third low-pressure storage unit 33 to create a low-pressure environment inside the third low-pressure storage unit 33 that is lower than the ambient air pressure.

[0045] The second low-pressure storage unit 32 and the third low-pressure storage unit 33 are stacked. When one of the second low-pressure storage unit 32 and the third low-pressure storage unit 33 located on the lower side is installed in the first mounting position on the door body 2, the air extraction connector 4 is adapted to the other of the second low-pressure storage unit 32 and the third low-pressure storage unit 33 located on the upper side for air extraction.

[0046] Specifically, when the second low-pressure storage unit 32 and the third low-pressure storage unit 33 are stacked, with the second low-pressure storage unit 32 located below the third low-pressure storage unit 33, the second low-pressure storage unit 32 is installed in the first mounting position on the door 2, and the air extraction connector 4 is adapted to the third low-pressure storage unit 33 for extracting air from the third low-pressure storage unit 33.

[0047] When the second low-pressure storage unit 32 and the third low-pressure storage unit 33 are stacked, with the third low-pressure storage unit 33 located below the second low-pressure storage unit 32, the third low-pressure storage unit 33 is installed in the first mounting position on the door 2, and the air extraction connector 4 is adapted to the second low-pressure storage unit 32 for extracting air from the second low-pressure storage unit 32.

[0048] The above technical solution combines two low-pressure storage units (second low-pressure storage unit 32 and third low-pressure storage unit 33) by stacking them together. One low-pressure storage unit increases the height of the other low-pressure storage unit, thereby enabling the evacuation of the low-pressure storage device from a large-distance installation position and improving space utilization efficiency.

[0049] In some embodiments of this application, the stacked height of the second low-pressure storage unit 32 and the third low-pressure storage unit 33 is equal to the height of a first low-pressure storage unit 31. This arrangement transforms the first mounting position from being solely the exclusive location of the first low-pressure storage unit 31 into a standard position for the vacuum system. During operation, the user can install the first low-pressure storage device at the first mounting position to vacuum it, or stack the second low-pressure storage unit 32 and the third low-pressure storage unit 33 and then install them at the first mounting position to vacuum the upper low-pressure storage unit. This arrangement ensures that, from the perspective of the door body 2's appearance and internal structure, regardless of the internal configuration, it occupies the same regular cubic space. This avoids unevenness or structural interference caused by different user choices, achieving seamless compatibility for immediate use.

[0050] The above technical solution eliminates the need for users to worry about compatibility issues. The door 2 has a standard first mounting position, which can accommodate a large-capacity first low-pressure storage unit 31, or two stacked small-capacity second low-pressure storage units 32 and 33. Placement is intuitive and enhances the user experience. Furthermore, since all options are physically compatible, users are virtually immune to installation problems, improving product reliability and user satisfaction.

[0051] The above technical solution, through a precise and standardized installation position and height (first installation position), enables physical interchangeability and compatibility of low-pressure storage modules of different volumes (whether single or in combination). This not only provides users with flexibility and convenience in using low-pressure storage devices, but also reduces manufacturing complexity through standardized design.

[0052] In some embodiments of this application, the second low-pressure storage unit 32 and the third low-pressure storage unit 33 have the same height. In the above technical solution, the second low-pressure storage unit 32 and the third low-pressure storage unit 33 are configured as components with exactly the same height; they can be completely identical components. During manufacturing, only one set of molds needs to be developed and one type of inventory managed to produce all the housings 1 required for the two functional modules, maximizing component versatility and saving costs. Users can use a large-volume low-pressure storage unit, or two small-volume basic low-pressure storage units (the second low-pressure storage unit 32 and the third low-pressure storage unit 33 stacked), or even a single small-volume basic low-pressure storage unit, as needed. This configuration of two sizes of low-pressure storage units, with the smaller size being completely universal, conforms to human cognitive habits and is simple and intuitive.

[0053] In some embodiments of this application, combined with Figures 2-8 Please refer to Figures 9-11 The door body 2 is provided with a first connector 51; the first connector 51 is located on the lower side of the air extraction connector 4.

[0054] The refrigerator 100 also includes a support tray 7, which is detachably connected to the first connector 51. When the support tray 7 is installed on the door 2 via the first connector 51, the first low-pressure storage unit 31 is installed on the support tray 7, and the first low-pressure storage unit 31 is located at a first mounting position on the door 2.

[0055] The above technical solution provides a raised and stable support surface for the first low-pressure storage unit 31 (or the second low-pressure storage unit 32 or the third low-pressure storage unit 33) by matching the tray 7 with the first connector 51 and providing a support surface for the third low-pressure storage unit 31. The tray 7 elevates the storage position of the first low-pressure storage unit 31 relative to the bottom of the door 2 to a height more suitable for hand operation when the user is standing naturally. When placing low-pressure storage devices or storing items (such as whole pieces of meat or large quantities of food) or frequently retrieving items, users do not need to bend over deeply, greatly reducing the burden on the lower back and improving user comfort.

[0056] Furthermore, when using only the tray 7, this location instantly transforms into an open, raised, convenient storage platform. Users can place frequently accessed items such as milk, beverages, and condiments here, making storage and retrieval more convenient and faster. At this time, the tray 7, as an independent load-bearing structure, can better distribute the weight (whether it is the first low-pressure storage unit 31 itself or the heavy objects inside it) onto the door 2, improving the overall load-bearing capacity and structural stability of this location.

[0057] Furthermore, the tray 7 is a separate, fully detachable component, making it easy to disassemble, clean, and maintain. In the event of a liquid leak or food residue contamination, the user can simply remove the tray 7 and rinse it in the sink, making it far more convenient to maintain than fixed or integrated storage boxes.

[0058] The above technical solutions, with the tray 7 as a multi-functional adapter component, make the space of the refrigerator door 2 no longer static and preset, but a dynamic functional area that can be flexibly defined and optimized by the user, thereby improving product practicality and user satisfaction.

[0059] In use, the support tray 7 is installed onto the first connector 51 to form a new, raised mounting surface. Then, the first low-pressure storage unit 31 is placed on the support tray 7. Because the lifting height of the support tray 7 is designed, the vent at the top of the first low-pressure storage unit 31 can be precisely aligned with the fixed venting connector 4. At this point, the position of the first mounting location in three-dimensional space is redefined by the support tray 7, but its connection function with the venting device is retained. After the venting connector 4 is aligned with the first low-pressure storage unit, the venting pump is activated to evacuate the first unit.

[0060] In some embodiments of this application, combined with Figures 2-8 Please refer to Figures 9-11A second connector 52 is provided on the door body 2. The second connector 52 is located below the exhaust connector 4 and on the side of the first connector 51 near the exhaust connector 4. The tray 7 is detachably connected to the second connector 52. When the tray 7 is installed on the door body 2 via the second connector 52, the second low-pressure storage unit 32 is installed on the tray 7, and the second low-pressure storage unit 32 is located in a second mounting position on the door body 2.

[0061] In the above technical solution, the second connector 52 is located above the first connector 51 (the second connector 52 is located on the side of the first connector 51 closer to the exhaust connector 4). This forms two mounting positions along the height direction of the door body 2. The first connector 51 (lower position) corresponds to the installation height of the first low-pressure storage unit 31. The first low-pressure storage unit 31 is the highest and needs to be placed on the lower support tray 7 so that its top interface does not exceed the range of the exhaust connector 4. The second connector 52 (higher position) corresponds to the installation height of the second low-pressure storage unit 32. The second unit is shorter and needs to be placed on the higher support tray 7 so that it can be raised to a position sufficient to connect with the exhaust connector 4.

[0062] A universal support tray 7 is used, whose height reference is changed through two (or more) connectors. This change precisely compensates for the height difference between the first low-pressure storage unit 31 and the second low-pressure storage unit 32, ensuring that although the two low-pressure storage units are at different heights, after being lifted by the support tray 7, their air extraction ports reach the same three-dimensional coordinate point—the position where they mate with the air extraction connector 4. This allows a single support tray 7 to accommodate low-pressure storage units of different heights within the system. This achieves the goal of meeting the most diverse functional requirements with the fewest types of parts. The universal design of the support tray 7 eliminates the need to design and manufacture dedicated supports or trays for the first low-pressure storage unit 31 and the second low-pressure storage unit 32. Requiring only one model of support tray 7 significantly reduces the complexity of parts management and manufacturing costs.

[0063] All low-pressure storage devices at different heights are connected to the door 2 via the same support tray 7, ensuring a uniform and reliable stress distribution. During maintenance, only the support tray 7 and a few connecting parts need to be inspected for damage; there is no need to worry about damage to the individual unit's connecting structure.

[0064] The above technical solution, through a fixed air extraction connector 4 and a set of dynamically adjustable mechanical structures (multi-stage connectors and universal support tray 7), achieves out-of-the-box compatibility with a series of low-pressure storage units of different heights and sizes. Users can intuitively configure and switch the storage units on the door 2 without the aid of any tools, allowing them to switch between multiple modes such as vacuum preservation and layered storage, which greatly improves space utilization and functional density.

[0065] Please refer to some embodiments of this application. Figures 9-11 The door body 2 includes an inner door liner 21 that is close to the housing 1 when the door body 2 is closed. The inner door liner 21 includes an inner door wall 21a, a first inner side wall 211, and a second inner side wall 212. The inner door wall 21a is opposite the access opening when the door body 2 is closed. The first inner side wall 211 extends along the height direction of the door body 2 and is located on the side of the inner door wall 21a closest to the pivot axis of the door body 2. The second inner side wall 212 extends along the height of the door body 2 and is located on the side of the inner door wall 21a furthest from the pivot axis of the door body 2.

[0066] The air extraction connector 4 is located on the inner wall 21a of the door; two first connecting pieces 51 are respectively located on the first inner sidewall 211 and the second inner sidewall 212; and two second connecting pieces 52 are respectively located on the first inner sidewall 211 and the second inner sidewall 212. In this technical solution, the inner wall 21a and the two inner sidewalls (the first inner sidewall 211 and the second inner sidewall 212) form a U-shaped rigid frame, with multi-level connecting pieces symmetrically arranged on both sides, forming a stable and precise double-sided symmetrical force-sealing installation structure. This solves the problem of stable installation of modular components on the moving door body 2. This technical solution ensures the reliable realization of all the advantages (flexibility, convenience, and multifunctionality) of the entire modular system from the underlying mechanical structure.

[0067] Please refer to Figures 12-13 Each of the first low-pressure storage unit 31, the second low-pressure storage unit 32, or the third low-pressure storage unit 33 has a fitting 6 at each of its opposite ends. The fitting 6 is detachably connected to the first connector 51 or the second connector 52 on the corresponding side.

[0068] When installing the low-pressure storage unit onto the door 2, as the user pushes the low-pressure storage unit into the U-shaped frame, the fittings 6 at both ends of the low-pressure storage unit simultaneously engage with the connectors on the two inner side walls. This process naturally guides the low-pressure storage unit into the correct position and ultimately ensures that the vent at its top precisely aligns with the vent connector 4 on the inner wall 21a of the door.

[0069] In the above technical solution, the inner wall 21a serves as the front support and mounting wall for the exhaust connector 4. The first inner wall 211 and the second inner wall 212 extend along the height direction, forming a robust U-shaped support frame. The first inner wall 211 and the second inner wall 212 are reinforced structures extending from the inner wall 21a toward the housing 1, and are the main structures that withstand shear forces and bending moments.

[0070] A first connector 51 and a second connector 52 are symmetrically arranged on the first inner wall 211 and the second inner wall 212. This ensures that the tray 7 or the low-pressure storage unit is fixed simultaneously on both sides, regardless of whether it is installed at a low or high position. Compared with single-sided or bottom support, the torsional and sway resistance of the double-sided support is increased by orders of magnitude. No matter how the door 2 is opened or closed, the internal low-pressure storage unit remains as stable as a whole, avoiding abnormal noise and structural fatigue caused by shaking. In addition, the above technical solution distributes the main mechanical connection and load-bearing functions to the inner walls (first inner wall 211 and second inner wall 212), rather than the potentially relatively weak inner wall 21a, ensuring the reliability and durability of the entire system under long-term use.

[0071] The weight of the low-pressure storage unit is transferred through the fittings 6 on both sides to the connectors on the inner walls of both sides that cooperate with the fittings 6, and then further to the U-shaped door liner 21 structure, and even the entire door body 2. When the door is opened and closed, the inertial force generated by opening and closing the door is also borne by the connection points on both sides (where the fittings 6 and the connectors are connected), forming a stable couple that effectively resists the shaking and torsion of the low-pressure storage unit.

[0072] Please refer to some embodiments of this application. Figures 9-13 The first connector 51 or the second connector 52 includes a first protrusion 5a and a first gap 5b. The first protrusion 5a is disposed on the first inner sidewall 211 and the second inner sidewall 212. The first gap 5b is defined by the first protrusion 5a and the inner wall 21a of the door.

[0073] The assembly 6 includes a first locking block 6b and a first groove 6a. The first locking block 6b is installed within a first gap 5b. The opening of the first groove 6a faces away from the air extraction connector 4; the first protrusion 5a is installed within the first groove 6a.

[0074] The above technical solution combines the installation and locking actions into a single installation action through the cooperation of the first protrusion 5a and the first groove 6a, and the cooperation of the first gap 5b and the first locking block 6b. After installation, as long as it is not pushed upwards, the low-pressure storage unit will not fall off due to gravity or the inertia of normal door opening and closing, achieving automatic anti-detachment and a high safety factor. This provides reliability against various forces in daily use without any additional operation or complex components. In addition, the purely mechanical structure offers far greater reliability than complex mechanisms that require additional locking buttons.

[0075] During installation, the user first lifts the low-pressure storage unit, aligning the first locking blocks 6b on both sides of the unit with the corresponding first gaps 5b on the inner wall of the door 2, and the first grooves 6a with the first protrusions 5a. Then, the user moves the low-pressure storage unit downwards. The first locking blocks 6b enter the first gaps 5b and slide along the inner wall; the first protrusions 5a enter the first grooves 6a and slide along the inner wall of the grooves 6a. The engagement of the first protrusions 5a and the first grooves 6a, and the engagement of the first locking blocks 6b and the first gaps 5b, ensures that once the low-pressure storage unit is fully installed on the door 2, any attempt to pull the unit directly outwards (towards the side away from the inner wall 21a) will cause the first protrusions 5a to press tightly against the inner wall of the first grooves 6a, forming a mechanical self-locking mechanism.

[0076] The weight of the low-pressure storage unit is borne by the contact between the upper surface of the first protrusion 5a and the upper inner wall of the first groove 6a. When the door is closed quickly, the low-pressure storage unit tends to move outward. This force also makes the first protrusion 5a and the outer inner wall of the first groove 6a (near the groove opening) engage more tightly, making the connection more stable under this dynamic load. When disassembly is required, the user only needs to gently push the unit upward to release the engagement between the first protrusion 5a and the first groove 6a and the engagement between the first locking block 6b and the first gap 5b, allowing the low-pressure storage unit to be removed outward and upward as a whole.

[0077] In some embodiments of this application, the size of the first protrusion 5a is denoted as the first dimension D along the direction from the end of the first inner sidewall 211 away from the inner wall 21a of the door to the inner wall 21a. The first dimension D gradually increases along the direction from the top to the bottom of the door body 2. With the above technical solution, when the user installs the low-pressure storage unit, the first groove 6a on the low-pressure storage unit preferentially contacts the top of the first protrusion 5a on the door body 2 with the smallest size, making it easier for the first protrusion 5a to enter the first groove 6a, resulting in less resistance during the initial installation and facilitating positioning and installation.

[0078] As the low-pressure storage unit continues to move downward, the size of the first protrusion 5a gradually increases along the direction perpendicular to the inner wall 21a of the door, which can further define the position of the first groove 6a relative to the first protrusion 5a, thereby enabling the low-pressure storage unit to be accurately installed on the door 2.

[0079] Please refer to some embodiments of this application. Figures 9-13 A second protrusion 5c is provided on the inner wall 21a of the door, near the first inner side wall 211 and the second inner side wall 212; the second protrusion 5c and the first protrusion 5a on the inner side wall near it together define the first gap 5b.

[0080] In the initial stage of installing the low-pressure storage unit onto the door 2, the user needs to align the first locking block 6b with the gap below the first protrusion 5a, and also with the "groove" formed by the first protrusion 5a and the second protrusion 5c. This groove pre-positions the locking block in both the horizontal and depth directions, making the insertion process more precise and reducing the error rate. During installation, the second protrusion 5c prevents the first locking block 6b from moving excessively towards the inner wall 21a of the door, avoiding collisions or friction between the locking block and the inner wall 21a. After the low-pressure storage unit is installed in place, the first locking block 6b is tightly wrapped in the space formed by the first protrusion 5a and the second protrusion 5c, enhancing the connection point's resistance to forces and torques, and effectively suppressing minor vibrations and abnormal noises of the low-pressure storage unit.

[0081] 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.

[0082] 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 container defines a storage compartment with an access opening; The door is used to open or close the pick-up and drop-off port; A first low-pressure storage unit and a second low-pressure storage unit are detachably connected to the door; wherein the height of the second low-pressure storage unit is less than the height of the first low-pressure storage unit. An air extraction device is disposed on the door body; the air extraction device includes: An air extraction connector is used to connect to either the first low-pressure storage unit or the second low-pressure storage unit. An air pump, which is connected to the air extraction connector, is used to extract air from the first low-pressure storage unit or the second low-pressure storage unit. When the first low-pressure storage unit is installed at the first mounting position on the door, the air extraction connector is adapted to the first low-pressure storage unit and is used to extract air from the first low-pressure storage unit. When the second low-pressure storage unit is installed in the second mounting position on the door, the air extraction connector is adapted to the second low-pressure storage unit and is used to extract air from the second low-pressure storage unit.

2. The refrigerator according to claim 1, characterized in that, The refrigerator also includes: The third low-pressure storage unit is detachably connected to the door. The second low-pressure storage unit and the third low-pressure storage unit are stacked. When one of the second low-pressure storage unit and the third low-pressure storage unit located on the lower side is installed in the first mounting position on the door body, the air extraction connector is adapted to the other of the second low-pressure storage unit and the third low-pressure storage unit located on the upper side for air extraction.

3. The refrigerator according to claim 2, characterized in that, The second and third low-pressure storage units are stacked at the same height as one of the first low-pressure storage units.

4. The refrigerator according to claim 2, characterized in that, The second low-pressure storage unit has the same height as the third low-pressure storage unit.

5. The refrigerator according to claim 1, 2, 3, or 4, characterized in that, The door body is provided with a first connector; the first connector is located on the lower side of the air extraction connector; The refrigerator also includes a support tray, which is detachably connected to the first connector; When the support tray is installed on the door body via the first connector, the first low-pressure storage unit is installed on the support tray, and the first low-pressure storage unit is located at the first installation position on the door body.

6. The refrigerator according to claim 5, characterized in that, The door body is provided with a second connector; the second connector is located below the air extraction connector and on the side of the first connector close to the air extraction connector; The support tray is detachably connected to the second connector; When the support tray is installed on the door body via the second connector, the second low-pressure storage unit is installed on the support tray, and the second low-pressure storage unit is located at the second mounting position on the door body.

7. The refrigerator according to claim 6, characterized in that, The door includes an inner liner that is close to the box when the door is closed; The inner liner of the door includes: The inner wall of the door is opposite to the opening when the door is closed; The first inner wall extends along the height of the door body and is located on the side of the inner wall of the door body near the pivot axis of the door body; The second inner wall extends along the height of the door body and is located on the side of the inner wall of the door away from the pivot axis of the door body; The air extraction connector is located on the inner wall of the door; The two first connectors are respectively disposed on the first inner sidewall and the second inner sidewall; The two second connectors are respectively disposed on the first inner sidewall and the second inner sidewall; The first, second, or third low-pressure storage unit is provided with fittings at both ends of the unit, and the fittings are detachably connected to the first or second connector on the corresponding side.

8. The refrigerator according to claim 7, characterized in that, The first connector or the second connector includes: The first protrusion is disposed on the first inner sidewall and the second inner sidewall; The first gap is defined by the first protrusion and the inner wall of the door; The assembly includes: The first card block is installed within the first gap; The first groove has its opening facing away from the air extraction connector; the first protrusion is installed in the first groove.

9. The refrigerator according to claim 8, characterized in that, The dimension of the first protrusion is denoted as the first dimension D, which is located in the direction from the end of the first inner sidewall away from the inner wall of the door towards the inner wall of the door. Along the direction from the top to the bottom of the door, the first dimension D gradually increases.

10. A refrigerator, characterized in that, include: The container defines a storage compartment with an access opening; The door is used to open or close the pick-up and drop-off port; The first low-pressure storage unit and the second low-pressure storage unit are detachably connected to the door body; An air extraction device is disposed on the door body; the air extraction device includes: An air extraction connector is used to connect to either the first low-pressure storage unit or the second low-pressure storage unit. An air pump, which is connected to the air extraction connector, is used to extract air from the first low-pressure storage unit or the second low-pressure storage unit. When the first low-pressure storage unit is installed at the first mounting position on the door, the air extraction connector is adapted to the first low-pressure storage unit and is used to extract air from the first low-pressure storage unit; the plane where the bottom end face of the first low-pressure storage unit is located is denoted as the first plane; When the second low-pressure storage unit is installed in the second mounting position on the door, the air extraction connector is adapted to the second low-pressure storage unit and is used to extract air from the second low-pressure storage unit; the plane where the bottom end face of the second low-pressure storage unit is located is referred to as the second plane; The first plane is located on the side of the second plane away from the air extraction connector.

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