Refrigerator

Abstract

The invention provides a refrigerator which comprises a refrigerator body, a low-pressure storage unit and an air extractor. The low-pressure storage unit comprises a shell, a door body, a pressure detection device, a sealing element, a storage container, a guide rail device and a locking structure; when the door body is closed, the locking structure locks the door body and the shell and extrudes the sealing element; when the air extractor works, the air pressure in the storage chamber is reduced, under the action of the pressure difference of the two opposite sides of the door body, the door body drives the storage container to move in the closing direction, and the sealing element is further pressed. When the air pressure in the storage chamber is reduced to the air exhaust conversion pressure, the air exhaust device is reduced from the first air exhaust rate to the second air exhaust rate; when the air pressure in the storage chamber is reduced to a first pressure value from the air exhaust conversion pressure, the air exhaust device stops working; according to the device, locking operation is completed in the process that a user closes the door body, a high-sealing environment is formed by pressure difference formed on the two opposite sides of the door body by fully utilizing vacuumizing after locking operation, and the vacuumizing requirement is met.

Description

Technical Field

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

[0002] In order to store food better, a vacuum storage device is now developed in the refrigerator, and the vacuum storage device is evacuated by a vacuum pump. The main function of vacuuming is to deoxygenate the vacuum drawer to prevent food from spoiling.

[0003] At present, in refrigerators with vacuum pumping function, the vacuum storage device includes a housing, a door, a storage drawer fixedly connected to the door, and a sealing member provided on one of the door or the housing. The door and the storage drawer are pushed into or pulled out of the housing together. In order to ensure the sealing of the vacuum storage device, the vacuum storage device is provided with a locking structure such as a handle.

[0004] After the door body drives the storage drawer into the shell, the seal is located between the relative mating surfaces of the door body and the shell. At this time, the user needs to manually operate the locking structure such as the handle to lock the door body and the shell. The locking structure applies sufficient locking force to the door body and the shell so that the door body and the shell can strongly squeeze the seal together to form a highly sealed environment, minimizing the entry of gas from the external environment into the vacuum storage device. Then vacuuming is performed.

[0005] The locking operation of the above vacuum storage device requires the user to perform an additional locking operation after closing the door body; the above locking operation is an action that the user must perform, which increases the operational requirements for the user.

[0006] In addition, the current locking structure aims to provide a highly sealed environment for vacuuming through the user's locking operation; the locking structure has a large locking force so that the locked door body and the housing exert a sufficiently large pressure on the sealing element. In order to meet the above locking force, the locking structure has a complex structure and occupies a large space. Summary of the invention

[0007] The invention solves one of the technical problems in the related art at least to some extent.

[0008] To this end, the present application aims to provide a refrigerator which has a simple structure, occupies a small space, has low requirements for user operation, and can meet the needs of vacuuming.

[0009] The refrigerator according to the present application comprises:

[0010] In some embodiments of the present application, the box body defines a storage room;

[0011] A low-pressure storage device, housed in the storage room;

[0012] an air extraction device connected to the low-pressure storage unit and used to extract the air in the low-pressure storage unit to form a low-pressure state in the low-pressure storage device;

[0013] The low-pressure storage device comprises:

[0014] a housing defining a storage chamber having a storage opening;

[0015] A door body, used to open or close the storage opening;

[0016] A pressure detection device, used to detect the pressure in the storage chamber to adjust the working state of the air extraction device;

[0017] A storage container, fixedly connected to the door body, for containing items;

[0018] A sealing element, provided on the door body or the housing, for making the door body seal and cooperate with the housing when closing the storage opening;

[0019] A guide rail device, which connects the storage container and the housing; the storage container is pushed into or pulled out of the storage chamber through the guide rail device;

[0020] A locking structure, used to lock the door body and the housing when the storage container is pushed into the storage chamber and the sealing element is compressed;

[0021] During the process of closing the door body from an open state, the door body drives the storage container to move in a closing direction, and the storage container is pushed into the storage chamber; when the door body closes the storage opening and the sealing element is squeezed by the door body and the shell, the locking structure locks the door body and the shell;

[0022] When the locking structure locks the door body and the housing and starts the air extraction device, the air extraction device works at a first air extraction rate; the air extraction speed of the first air extraction rate is greater than the speed at which the external environment gas enters the storage chamber, and an air pressure difference is formed on opposite sides of the door body, so as to push the door body to drive the storage container to move a certain displacement in the closing direction, and the sealing element is further compressed;

[0023] When the air pressure in the storage chamber is reduced to the air extraction conversion pressure, the air extraction device is reduced from the first air extraction efficiency to the second air extraction efficiency;

[0024] When the air pressure in the storage chamber decreases from the air extraction conversion pressure to the first pressure value, the air extraction device stops working.

[0025] In some embodiments of the present application, the box body defines a storage room;

[0026] A low-pressure storage device, housed in the storage room;

[0027] an air extraction device connected to the low-pressure storage unit and used to extract the air in the low-pressure storage unit to form a low-pressure state in the low-pressure storage device;

[0028] The low-pressure storage device comprises:

[0029] a housing defining a storage chamber having a storage opening;

[0030] A door body, used to open or close the storage opening;

[0031] A storage container, fixedly connected to the door body, for containing items;

[0032] A sealing element, provided on the door body or the housing, for making the door body seal and cooperate with the housing when closing the storage opening;

[0033] A guide rail device, which connects the storage container and the housing; the storage container is pushed into or pulled out of the storage chamber through the guide rail device;

[0034] A locking structure, used to lock the door body and the housing when the storage container is pushed into the storage chamber and the sealing element is compressed;

[0035] A second position detection device is used to detect whether the door body moves to the air extraction change position or the vacuum sealing position, so as to adjust the working state of the air extraction device;

[0036] During the process of closing the door body from an open state, the door body drives the storage container to move in a closing direction, and the storage container is pushed into the storage chamber; when the door body closes the storage opening and the sealing element is squeezed by the door body and the shell, the locking structure locks the door body and the shell;

[0037] When the locking structure locks the door body and the housing and starts the air extraction device, the air extraction device works at a first air extraction rate, wherein the air extraction speed of the first air extraction rate is greater than the speed at which the external environment gas enters the storage chamber, and an air pressure difference is formed on opposite sides of the door body, so as to push the door body to drive the storage container to move a certain displacement in the closing direction, and the sealing element is further compressed;

[0038] When the door body moves to the air extraction change position, the air extraction efficiency of the air extraction device is reduced to the second air extraction efficiency;

[0039] When the door body moves to the vacuum sealing position, the air extraction device stops working.

[0040] In some embodiments of the present application, the second position detection device is disposed on the rear wall of the housing; the second position detection device includes a transmitting end and a receiving end;

[0041] The transmitting end emits a light beam toward the wall surface of the storage container close to the rear wall of the shell. The wall surface of the storage container close to the rear wall of the shell is on the optical path of the light beam emitted by the transmitting end. The light beam emitted by the transmitting end is reflected, and the reflected light beam is received by the receiving end and converted into an electrical signal for output. According to the intensity difference and time difference of the reflected light, it can be judged whether the door body moves to the air extraction change position or the vacuum sealing position.

[0042] In some embodiments of the present application, the box body defines a storage room;

[0043] A low-pressure storage device, housed in the storage room;

[0044] an air extraction device connected to the low-pressure storage unit and used to extract the air in the low-pressure storage unit to form a low-pressure state in the low-pressure storage device;

[0045] The low-pressure storage device comprises:

[0046] a housing defining a storage chamber having a storage opening;

[0047] A door body, used to open or close the storage opening;

[0048] A pressure detection device, used to detect the pressure in the storage chamber to adjust the working state of the air extraction device;

[0049] A storage container, fixedly connected to the door body, for containing items;

[0050] A sealing element, provided on the door body or the housing, for making the door body seal and cooperate with the housing when closing the storage opening;

[0051] A guide rail device, which connects the storage container and the housing; the storage container is pushed into or pulled out of the storage chamber through the guide rail device;

[0052] A locking structure is used to lock the door body and the housing in a pre-locking position when the storage container moves in the pushed direction; and the locking structure allows the door body to continue to move a certain distance in the closing direction under the action of the pressure difference on both sides thereof when the air extraction device is working;

[0053] A second position detection device is used to detect whether the door body moves to the air extraction change position to adjust the working state of the air extraction device;

[0054] When the locking structure locks the door body and the housing and starts the air extraction device, the air extraction device works at a first air extraction rate; the air extraction speed of the first air extraction rate is greater than the speed at which the external environment gas enters the storage chamber, and an air pressure difference is formed on opposite sides of the door body, so as to push the door body to drive the storage container to move a certain displacement in the closing direction, and the sealing element is further compressed;

[0055] When the door body moves to the air extraction change position, the air extraction device reduces the first air extraction efficiency to the second air extraction efficiency;

[0056] When the air pressure in the storage chamber drops to a first pressure value, the air extraction device stops working.

[0057] In some embodiments of the present application, the box body defines a storage room;

[0058] A low-pressure storage device, housed in the storage room;

[0059] an air extraction device connected to the low-pressure storage unit and used to extract the air in the low-pressure storage unit to form a low-pressure state in the low-pressure storage device;

[0060] The low-pressure storage device comprises:

[0061] a housing defining a storage chamber having a storage opening;

[0062] A door body, used to open or close the storage opening;

[0063] A storage container, fixedly connected to the door body;

[0064] A guide rail device connecting the storage container and the housing so that the storage container can be pushed into or pulled out of the storage chamber;

[0065] A sealing element is provided on the door body or the shell; when the door body is in a closed position, the sealing element is squeezed by the shell and the door body;

[0066] A locking structure, used to lock the door body and the housing when the storage container is pushed into the storage chamber and the sealing element is compressed;

[0067] A second position detection device, used to detect whether the door body moves to the air extraction change position, so as to adjust the working state of the air extraction device;

[0068] a third position detection device, used to detect whether the door body has moved to the vacuum sealing position, so as to adjust the working state of the air extraction device;

[0069] During the process of closing the door body from an open state, the door body drives the storage container to move in a closing direction, and the storage container is pushed into the storage chamber; when the door body closes the storage opening and the sealing element is squeezed by the door body and the shell, the locking structure locks the door body and the shell;

[0070] When the locking structure locks the door body and the housing and starts the air extraction device, the air extraction device works at a first air extraction rate; the air extraction speed of the first air extraction rate is greater than the speed at which the external environment gas enters the storage chamber, and an air pressure difference is formed on opposite sides of the door body, so as to push the door body to drive the storage container to move a certain displacement in the closing direction, and the sealing element is further compressed;

[0071] When the door body moves to the air extraction change position, the air extraction efficiency of the air extraction device is reduced to the second air extraction efficiency;

[0072] When the door body moves to the vacuum sealing position, the air extraction device stops working.

[0073] In some embodiments of the present application, the second position detection device includes a second proximity detection device fixed to the housing, and a second proximity sensing body fixed to the door or the storage container;

[0074] When the door body moves to the air extraction change position, the second proximity sensing body corresponds to the position of the second proximity detection device and acts on the second proximity detection device to transmit a signal indicating that the door body is closed to the air extraction change position;

[0075] When the door is opened, the second proximity sensing body is away from the second proximity detecting device and cannot have any effect on the second proximity detecting device, and the second proximity detecting device has no signal transmission.

[0076] In some embodiments of the present application, the third position detection device includes a third proximity detection device fixed on the housing, and a third proximity sensor fixed on the door or the storage container;

[0077] When the door body moves to the vacuum sealing position, the third proximity sensing body corresponds to the position of the third proximity detection device and acts on the third proximity detection device to transmit a signal indicating that the door body is closed to the vacuum sealing position;

[0078] When the door is opened, the third proximity sensing body is away from the third proximity detection device and cannot have any effect on the third proximity detection device, and the third proximity detection device has no signal transmission.

[0079] In some embodiments of the present application, the vacuum device includes a vacuum pump; the vacuum pump working at a first rotational speed is defined as the vacuum device working at a first pumping rate; the vacuum device working at a second rotational speed is defined as the vacuum device working at a second pumping rate;

[0080] The ratio of the first rotational speed of the vacuum pump to the rated rotational speed of the vacuum pump is any value between 0.8 and 1; the ratio of the second rotational speed of the vacuum pump to the rated rotational speed of the vacuum pump is any value between 0.5 and 0.8.

[0081] In some embodiments of the present application, the vacuum device comprises a vacuum pump; the vacuum pump working at a first power is defined as the vacuum device working at a first vacuum rate; the vacuum device working at a second power is defined as the vacuum device working at a second vacuum rate;

[0082] The ratio of the first power of the vacuum pump to the rated power of the vacuum pump is any value between 0.8 and 1; the ratio of the second power of the vacuum pump to the rated power of the vacuum pump is any value between 0.5 and 0.8.

[0083] In some embodiments of the present application, the guide rail device includes an inner rail and an outer rail that are movably connected, the inner rail is fixedly connected to the storage container, and the outer rail is fixedly connected to the inner wall of the shell;

[0084] The inner rail has a locking groove at one end close to the rear wall of the shell, and the outer rail has a locking slider at one end close to the rear wall of the shell;

[0085] When the door body is closed, the door body moves with the inner rail toward the rear wall of the housing, and the inner rail drives the locking groove toward the locking slider; the locking slider elastically deforms and enters the locking groove, and then the locking slider at least partially recovers to complete locking with the locking groove;

[0086] When the locking structure locks the door body and the shell and the vacuum device is working, under the action of the pressure difference between the side of the door body close to the external environment and the side of the door body close to the storage chamber, the locking groove continues to move a certain distance in the closing direction relative to the locking slide buckle.

[0087] Compared with the prior art, the advantages and positive effects of the present invention are:

[0088] The present invention provides a refrigerator, which includes a box body, a low-pressure storage unit accommodated in the box body, and an exhaust device connected to the low-pressure storage unit and used to extract the air in the low-pressure storage unit; the low-pressure storage unit includes a shell, a door body, a pressure detection device for detecting the pressure in the storage chamber, a sealing element arranged on the shell body or the door body, a storage container fixedly connected to the door body, a guide rail device connecting the storage container and the shell so that the storage container is pushed into or pulled out of the storage chamber along the guide rail device, and a locking structure for locking the door body and the shell when the door body is closed; when the door body is closed, the locking structure locks the door body and the shell, and the door body and the shell squeeze the sealing element; when the exhaust device is working, the air pressure in the storage chamber is reduced, and when the door body is close to the Under the action of the pressure difference between the side close to the outside and the side close to the storage chamber, the door body drives the storage container to move in the closing direction through the guide rail device, and the sealing element is further compressed; when the air pressure in the storage chamber is reduced to the air pumping conversion pressure, the air pumping device is reduced from the first air pumping rate to the second air pumping efficiency; when the air pressure in the storage chamber is reduced from the air pumping conversion pressure to the first pressure value, the air pumping device stops working; the arrangement of the present invention completes the locking operation during the process of the user closing the door body, and no additional locking operation is required, and the requirements for user operation are low; then after the locking operation, the vacuum is fully utilized to form a pressure difference on the opposite sides of the door body to form a high sealing environment, thereby forming a low-pressure storage environment to meet the vacuum pumping requirements. In addition, the present invention has a simple structure, occupies a small space, and has a smaller locking force requirement for the locking structure than the locking force of the current locking structure.

[0089] The above-mentioned solution provided in the present application breaks the existing setting method of manually operating the locking structure to form a highly sealed environment before vacuuming (the user additionally performs a locking operation through the locking device after closing to lock the door body and the shell, thereby forming a sealed condition that minimizes the entry of gas from the external environment into the vacuum storage device). BRIEF DESCRIPTION OF THE DRAWINGS

[0090] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0091] Figure 1 is a three-dimensional diagram of a refrigerator of the present invention;

[0092] Figure 2 is a schematic structural diagram of a low-pressure storage device of a refrigerator of the present invention when it is in a closed state;

[0093] Figure 3 is a schematic structural diagram of a low-pressure storage device of a refrigerator of the present invention when it is in an open state;

[0094] Figure 4 Schematic diagram of the relative positions of the door body and the sealing element of the low-pressure storage device of the refrigerator of the present invention;

[0095] Figure 5 It is a structural schematic diagram of a sealing element of a refrigerator of the present invention;

[0096] Figure 6 is a cross-sectional view of a low-pressure storage device of a refrigerator of the present invention;

[0097] Figure 7 yes Figure 6 A magnified image of area A;

[0098] Figure 8 yes Figure 7 Schematic diagram of the exploded structure of the sealing element and the door body;

[0099] Fig. 9 yes Figure 7 Schematic diagram of the matching structure between the sealing element and the shell when the middle door body is opened;

[0100] Fig.10 is another structural schematic diagram of the sealing element of the refrigerator of the present invention;

[0101] Fig.11 is another structural schematic diagram of the sealing element of the refrigerator of the present invention;

[0102] Fig.12 It is a schematic diagram of another structure of the sealing element cooperating with the housing when the door of the refrigerator of the present invention is closed;

[0103] Fig.13 It is a schematic diagram of the exploded structure of the guide rail device provided with a push-open locking structure of the refrigerator of the present invention;

[0104] Fig.14 It is a schematic structural diagram of the guide rail device provided with a push-open locking structure of the refrigerator of the present invention when it is in an open state;

[0105] Fig.15 It is a partial structural schematic diagram of the refrigerator of the present invention when the guide rail device provided with a push-open locking structure is in an open state;

[0106] Fig.16 It is a structural schematic diagram of the guide rail device provided with a push-open locking structure of the refrigerator of the present invention when it is in a closed state;

[0107] Fig.17 It is a structural schematic diagram of a fixing seat of a push-open locking structure of a refrigerator of the present invention;

[0108] Fig.18It is a structural schematic diagram of another viewing angle of the fixing seat of the push-open locking structure of the refrigerator of the present invention;

[0109] Fig.19 It is a schematic structural diagram of the guide rail device provided with a push-to-lock structure of the refrigerator of the present invention when unlocked;

[0110] Fig. 20 It is a schematic diagram of the structure of the guide rail device provided with a push-to-lock structure of the refrigerator of the present invention when it is pressed from an unlocked state;

[0111] Fig.21 It is a schematic structural diagram of the guide rail device provided with a push-to-lock structure of the refrigerator of the present invention when locked;

[0112] Fig. 22 It is a schematic diagram of the structure of the guide rail device provided with a push-to-lock structure of the refrigerator of the present invention when it is pressed from a locked state;

[0113] Fig.23 It is a structural schematic diagram of the guide rail device with a locking structure having a self-locking function of the refrigerator of the present invention in a locked state;

[0114] Fig.24 It is a partial structural schematic diagram of the guide rail device with a self-locking function locking structure of the refrigerator of the present invention in a locked state;

[0115] Fig.25 It is a partial structural schematic diagram of the guide rail device with a locking structure having a self-locking function of the refrigerator of the present invention when in a locked state;

[0116] Fig.26 It is a structural schematic diagram of the guide rail device with a self-locking function locking structure of the refrigerator of the present invention in an unlocked state;

[0117] Fig. 27 It is a partial structural schematic diagram of the guide rail device with a self-locking function locking structure of the refrigerator of the present invention when it is in an unlocked state;

[0118] Fig.28 It is a schematic diagram of the exploded structure of the guide rail device with a self-locking function locking structure of the refrigerator of the present invention;

[0119] Fig.29 It is a structural schematic diagram of the guide rail device with a double self-locking function locking structure of the refrigerator of the present invention in a locked state;

[0120] Fig.30 It is a partial structural schematic diagram of the guide rail device with a double self-locking function locking structure of the refrigerator of the present invention when in a locked state;

[0121] Fig.31 It is a partial structural schematic diagram of the guide rail device with a double self-locking function locking structure of the refrigerator of the present invention in a locked state;

[0122] Fig.32 It is a schematic diagram of the exploded structure of the guide rail device with a double self-locking function locking structure of the refrigerator of the present invention;

[0123] Fig.33 It is a structural schematic diagram of a toggle block with a double self-locking function locking structure of a refrigerator of the present invention;

[0124] Fig.34 It is a structural schematic diagram of a position limiting member with a locking structure having double self-locking functions of a refrigerator of the present invention;

[0125] Fig.35 It is a schematic structural diagram of another viewing angle of the position-limiting member with a locking structure having double self-locking functions of the refrigerator of the present invention;

[0126] Fig.36 It is a partial structural schematic diagram of the refrigerator of the present invention when the guide rail device with a lock switch type locking structure is in a locked state;

[0127] Fig.37 It is a partial structural schematic diagram of the refrigerator of the present invention when the guide rail device with a lock switch type locking structure is in an unlocked state;

[0128] Fig.38 It is a schematic diagram of the exploded structure of the guide rail device with a lock switch type locking structure of the refrigerator of the present invention;

[0129] Fig.39 A schematic diagram of the exploded structure of the guide rail device with a lock switch type locking structure of the refrigerator of the present invention;

[0130] Fig.40 It is a schematic structural diagram of a refrigerator door with a flip beam when the refrigerator door of the present invention is closed;

[0131] Fig.41 It is a schematic diagram of the relative positions of the turning beam and the door body of the low-pressure storage device when the refrigerator door of the present invention is closed;

[0132] Fig.42 It is a schematic diagram of the exploded structure of the low-pressure storage device of the refrigerator of the present invention.

[0133] In the above figures: box body 10; box door 11; storage room 12; access opening 13; storage container 14;

[0134] door body 3; mounting portion 30; electronic ventilation unit 31; vacuum pump 32; inner rail 33; middle rail 34; outer rail 35; nitrogen and oxygen separation membrane 36; housing 2; storage chamber 20; storage port 21; sealing ridge 22; hooking portion 23; mounting opening 28; sealing element 4; first connecting strip 40; first matching strip 41; second matching strip 42; connecting portion 43; hooking portion 44; sealing groove 45; extrusion portion 46; matching ridge 47; deformation gap 48; flip beam 5; free end 50; buffer block 51; fixing seat 6; pushing portion 61; hooking portion 62; return The back portion 63; the first guide portion 64; the second guide portion 65; the mounting groove 66; the second limiting portion 68; the guide limiting portion 15; the guide rod 16; the guide member 60; the slider 1; the movable link 7; the first connecting shaft 71; the second connecting shaft 72; the first guiding inclined surface 74; the elastic member 70; the toggle block 8; the traction recess 81; the guide portion 82; the first locking column 83; the second locking column 84; the toggle tooth 85; the locking inclined groove 86; the limiting member 9; the limiting plate 91; the toggle block 92; the positioning shaft 93; the protrusion 94; the rotating shaft 95; the third locking portion 90; the torsion spring 80;

[0135] Locking groove 96; locking slide buckle 97. DETAILED DESCRIPTION

[0136] In order to make the purpose and implementation method of the present application clearer, the exemplary implementation method of the present application will be clearly and completely described below in conjunction with the drawings in the exemplary embodiments of the present application. Obviously, the described exemplary embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0137] It should be noted that the brief description of terms in this application is only for the convenience of understanding the embodiments described below, and is not intended to limit the embodiments of this application. Unless otherwise specified, these terms should be understood according to their common and usual meanings.

[0138] The terms "first", "second", "third", etc. in the specification and claims of this application and the above drawings are used to distinguish similar or similar objects or entities, and do not necessarily mean to limit a specific order or sequence, unless otherwise noted. It should be understood that the terms used in this way can be interchangeable under appropriate circumstances.

[0139] The terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover but not exclude inclusion, for example, a product or device comprising a list of components is not necessarily limited to all the components expressly listed but may include other components not expressly listed or inherent to such product or device.

[0140] In order to make the purpose and implementation method of the present application clearer, the exemplary implementation method of the present application will be clearly and completely described below in conjunction with the drawings in the exemplary embodiments of the present application. Obviously, the described exemplary embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0141] It should be noted that the brief description of terms in this application is only for the convenience of understanding the embodiments described below, and is not intended to limit the embodiments of this application. Unless otherwise specified, these terms should be understood according to their common and usual meanings.

[0142] The terms "first", "second", "third", etc. in the specification and claims of this application and the above drawings are used to distinguish similar or similar objects or entities, and do not necessarily mean to limit a specific order or sequence, unless otherwise noted. It should be understood that the terms used in this way can be interchangeable under appropriate circumstances.

[0143] The terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover but not exclude inclusion, for example, a product or device comprising a list of components is not necessarily limited to all the components expressly listed but may include other components not expressly listed or inherent to such product or device.

[0144] Please refer to Figure 1-Figure 42 The refrigerator includes a cabinet 10 having a storage chamber 12, a cabinet door 11 connected to the cabinet 10 to open and close the storage chamber 12, and a refrigeration device for supplying cold air to the storage chamber 12. The cabinet 10 includes an inner tank defining the storage chamber 12, an outer shell connected to the outer side of the inner tank to form the appearance of the refrigerator, and an insulating layer provided between the inner tank and the outer shell to insulate the storage chamber 12.

[0145] The inner shell of the box body 10 defines a plurality of storage chambers 12. In some embodiments of the present application, the plurality of storage chambers 12 include a refrigerator chamber and a freezer chamber below the refrigerator chamber; it should be noted that the arrangement of the plurality of storage chambers 12 of the refrigerator is not limited to the above examples.

[0146] A loading and unloading opening 13 is formed at the front end of the storage chamber 12 for placing food into the storage chamber 12 or taking food out of the storage chamber 12 ; the box door 11 is connected to the box body 10 to open or close the loading and unloading opening 13 of the storage chamber 12 .

[0147] The refrigerator is provided with a low-pressure storage device that can be maintained in a low-pressure state and an exhaust device for extracting gas from the low-pressure storage device to form a low-pressure state in the inner cavity of the low-pressure storage device. In some embodiments of the present application, the exhaust device includes a vacuum pump 32 and an exhaust pipeline connected to the vacuum pump 32 and the low-pressure storage device. The low-pressure storage device is sealed, and when the exhaust device is working, the vacuum pump 32 is started to extract the gas in the low-pressure storage device, thereby reducing the pressure in the low-pressure storage device and forming a vacuum storage environment.

[0148] The refrigerator is provided with a controller, which can control the working state of each component of the refrigerator. For example, the controller can control the vacuum device to vacuum the low-pressure storage device, so as to realize automatic control of vacuuming the low-pressure storage device.

[0149] In some embodiments of the present application, the low-pressure storage device is disposed in a refrigerating chamber. It should be understood that in other embodiments, the low-pressure storage device may also be disposed in other storage rooms, such as a variable temperature room whose temperature range can be switched between a refrigerating temperature zone and a freezing temperature zone.

[0150] In some embodiments of the present application, the low-pressure storage device is located at the bottom of the refrigerating chamber and is supported on the bottom wall of the refrigerating chamber.

[0151] In some embodiments of the present application, the low-pressure storage device can be constructed independently of the box body 10 and then assembled in the box body 10. The low-pressure storage device can be inserted into the refrigerating chamber or pulled out from the refrigerating chamber.

[0152] like Figure 1-Figure 4 As shown, the low-pressure storage device includes a housing 2 defining a storage chamber 20 and having a storage opening 21, a storage container 14 that can be pushed into or pulled out of the storage chamber 20 defined by the housing 2, and a door body 3 fixedly connected to the storage container 14. When the door body 3 closes the storage opening 21, the storage container 14 is pushed into the storage chamber 20, and the items placed in the storage container 14 are stored in the storage chamber 20. The door body 3 and the storage container 14 together constitute a drawer unit that can be pushed into and pulled out of the housing 2.

[0153] The housing 2 has a housing rear wall arranged opposite to the storage opening 21 and a front face of the housing 2 formed with the storage opening 21. The direction from the housing rear wall to the front face of the housing 2 is recorded as a first moving direction, and the direction from the front face of the housing 2 to the housing rear wall is recorded as a second moving direction. The first moving direction is opposite to the second moving direction, and the drawer unit can move along the first moving direction or the second moving direction.

[0154] When the storage port 21 is closed by the door body 3 and the vacuum device is started, the gas in the storage chamber 20 is evacuated, and the storage chamber 20 is in a low-pressure state. According to one embodiment of the present invention, when the vacuum device finishes working, the pressure in the storage chamber 20 is lower than one standard atmospheric pressure or between one standard atmospheric pressure and absolute vacuum. Since the gas pressure in the storage chamber 20 is lower than one standard atmospheric pressure, those skilled in the art also commonly call it a "vacuum chamber".

[0155] In some embodiments of the present application, a sealing element 4 may be provided on the door body 3 to form an airtight joint between the shell 2 and the door body 3 when the door body 3 and the shell 2 jointly squeeze the sealing element 4, so as to prevent gas from entering the low-pressure storage device 12 from the joint between the shell 2 and the door body 3.

[0156] As another possible arrangement, the sealing element 4 can also be arranged at the front end of the housing 2, for example, connected to the front end surface of the housing 2. When the door body 3 closes the storage opening 21, the door body 3 and the housing 2 can be sealed together through the sealing element 4, and the housing 2 and the door body 3 together define a closed storage space.

[0157] In some embodiments of the present application, the sealing element 4 is annular and surrounds the periphery of the storage opening 21 when the door 3 is closed.

[0158] In some embodiments of the present application, the sealing element 4 is a compressible sealing member.

[0159] The sealing element 4 has a deformable length along the moving direction of the storage container 14 being pushed into or pulled out of the storage chamber 20. That is, in the direction perpendicular to the plane where the storage port 21 is located, the sealing element 4 is compressed and deformed by the shell 2 and the door body 3. Among them, the maximum amount of deformation of the sealing element 4 by the shell 2 and the extrusion portion 46 of the door body 3 from its natural state is recorded as the maximum deformable stroke L0. When the door body 3 is closed, the sealing element 4 is compressed under the joint extrusion of the door body 3 and the front end surface of the shell 2, and the deformation length of the compressed sealing element 4 is not greater than the maximum deformable stroke L0. That is, when the door body 3 is closed, the deformable amount of the sealing element 4 allows the door body 3 and the shell 2 to be further approached to each other under the action of external force so that the sealing element 4 is further compressed.

[0160] When the door body 3 is opened, the door body 3 is separated from the housing 2 , the pressure applied to the sealing element 4 is removed, and the sealing element 4 is restored to a natural state by the squeeze portion 46 of the housing 2 and the door body 3 .

[0161] It can be set that, for the same sealing element 4, the greater the compression amount generated by the joint extrusion and deformation of the sealing element 4 by the door body 3 and the shell 2, the better the airtightness formed between the door body 3 and the shell 2, and the better the effect of preventing gas from entering the low-pressure storage device 12 from the joint between the door body 3 and the shell 2.

[0162] In some embodiments of the present application, the sealing element 4 is a rubber seal.

[0163] In some embodiments of the present application, the sealing element 4 may be configured as an airbag seal.

[0164] In some embodiments of the present application, Figure 4-Figure 5 As shown, the sealing element 4 is disposed on the door body 3 , is annular and surrounds one end of the storage container 14 close to the door body 3 , so that when the door body 3 and the housing 2 are closed, the sealing element 4 surrounds the storage opening 21 for sealing.

[0165] In some embodiments of the present application, the sealing element 4 has a first connecting strip 40. A mounting portion 30 is formed on the door body 3 around the storage container 14, the first connecting strip 40 is installed in the mounting portion 30, and the first connecting strip 40 is sealed and connected to the mounting portion 30, so that the sealing element 4 is sealed and connected to the door body 3.

[0166] In some embodiments of the present application, the sealing element 4 has a first matching strip 41, and the first matching strip 41 is located on a side of the first connecting strip 40 close to the housing 2. The first matching strip 41 has a first matching surface and a second matching surface that are oppositely disposed.

[0167] The first mating surface is connected to the first connecting strip 40, and the first mating surface is matched with the end surface of the door body 3 close to the shell 2 and surrounding the mounting portion 303. When the sealing element 4 is compressed, the first mating surface is sealed with the wall surface of the door body 3 close to the shell 2.

[0168] The second mating surface is located on a side of the first mating surface away from the first connecting strip 40 , and is used to be mated with the front end surface of the housing 2 when the door body 3 is closed.

[0169] When the door body 3 is closed, the first matching strip 4142 is squeezed by the door body 3 and the shell 2 and deforms in a direction perpendicular to the plane where the storage opening 21 is located.

[0170] In some embodiments of the present application, at least one mating protrusion 47 is provided on the second mating surface, and the mating protrusion 47 is formed protrudingly on the side of the second mating surface close to the shell 2. When the door body 3 is closed, the mating protrusion 47 contacts the front end surface of the shell 2 before the second mating surface, and as the extrusion force of the door body 3 and the shell 2 on the sealing element 4 increases, the mating protrusion 47 is compressed and deformed, and a sealing fit between the door body 3 and the shell 2 is preferentially formed. The above arrangement of the mating protrusion 47 compensates for the small gap between the door body 3 and the shell 2 when they are closed due to processing, installation, uneven front end surface of the shell 2, etc., and can ensure the sealing of the door body 3 and the shell 2, and avoid the sealing failure caused by the sealing element 4 not being effectively squeezed by the door body 3 and the shell 2 when the door body 3 is closed due to processing, installation, uneven front end surface of the shell 2, etc.

[0171] As a configurable manner, two or more matching protrusions 47 are arranged at intervals to form a multi-layer sealing fit.

[0172] As a configurable manner, along the normal direction of the second mating surface, at least two of the two or more mating protrusions 47 have unequal heights. When the door body 3 is closed, when the mating protrusions 47 are mated with the front end surface, the mating protrusions 47 with unequal heights are squeezed and deformed differently, so as to form multiple layers of sealing with different sealing degrees.

[0173] As a configurable method, two or more mating protrusions 47 are annular. Among them, one of the two adjacent mating protrusions 47 is located outside the other. Along the normal direction of the second mating surface, the height of the mating protrusion 47 located outside the two adjacent mating protrusions 47 is greater than the other, so as to preferentially form a sealed fit at a position close to the external environment. In addition, when the two adjacent mating protrusions 47 are compressed to form a sealed fit, the compression deformation of the mating protrusion 47 located outside the periphery is greater than that of the mating protrusion 47 located inside the periphery, and the sealing performance of the mating protrusion 47 located outside the periphery is better than that of the mating protrusion 47 located inside the periphery.

[0174] As a possible arrangement, two or more mating protrusions 47 are annular. In the projection of the second mating surface, the annular mating protrusions 47 share a centroid. A ray starting from the centroid of the mating protrusion 47 intersects with each mating protrusion 47. As the distance between the intersection of the mating protrusion 47 and the ray and the centroid of the mating protrusion 47 increases, the height of the mating protrusion 47 along the normal direction of the second mating surface increases, so as to preferentially form a sealed fit at a position close to the external environment.

[0175] Specifically, two mating protrusions 47 are provided, the two mating protrusions 47 are recorded as a first mating protrusion 47 and a second mating protrusion 47, and the second mating protrusion 47 surrounds the periphery of the first mating protrusion 47. Along the normal direction of the second mating surface, the height of the second mating protrusion 47 is greater than the height of the first mating protrusion 47, so as to form a sealing fit preferentially at a position close to the external environment.

[0176] In some embodiments of the present application, Figure 6-Figure 9 As shown, the sealing element 4 has a second matching strip 42. The second matching strip 42 is located at a side of the first matching strip 41 close to the housing 2, and the second matching strip 42 is located at an end of the first matching strip 4142 close to the storage container 14.

[0177] In some embodiments of the present application, the second mating strip 42 is surrounded by the mating protrusion 47 , and the mating protrusion 47 surrounds the periphery of the second mating strip 42 .

[0178] In some embodiments of the present application, the second mating strip 42 includes a connecting portion 43 extending from one end of the first mating strip 41 away from the first connecting strip 40 to a side away from the first connecting strip 40, and a hooking portion 44 extending from one end of the connecting portion 43 away from the first connecting strip 40 to a side away from the storage container 14 and close to the first connecting strip 40. When the door body 3 is closed, the connecting portion 43 extends into the storage chamber 20, and the hooking portion 44 is squeezed by the inner wall of the shell to seal with the inner wall of the shell 2.

[0179] In some embodiments of the present application, a hooking portion 23 is provided on the inner wall of the shell 2 defining the storage chamber 20, and the hooking portion 23 is close to the storage opening 21. When the door 3 is closed, the second mating strip 42 extends into the storage chamber 20 and is located on the inner wall of the shell 2 away from the outer wall of the shell 2; the second mating strip 42 is mated with the hooking portion 23 to be sealed with the inner wall of the shell 2.

[0180] In some embodiments of the present application, when the door body 3 is closed, the connecting portion 43 extends into the storage chamber 20 , and the hooking portion 44 cooperates with the hooking portion 23 to seal with the inner wall of the shell 2 .

[0181] The above-mentioned setting of the sealing element 4 enables there to be multiple fitting points between the sealing element 4 and the shell 2, and the multiple fitting points are not on the same plane. The gas needs to slowly enter the storage chamber 20 through multiple fitting gaps that are not on the same plane. The path for the gas to enter the storage chamber 20 is extended, and the path has many bends and turns, which effectively reduces the amount of gas entering the storage chamber 20, ensures the pressure maintenance performance of the vacuum degree in the storage chamber 20, and extends the vacuum maintenance time.

[0182] In some embodiments of the present application, Fig.10 As shown, the end of the first matching strip 41 away from the first connecting strip 40 and close to the storage container 14 extends to the side away from the first connecting strip 40 to form a connecting portion 43; the end of the connecting portion 43 away from the first connecting strip 40 extends to the side away from the storage container 14 to form an extrusion portion 46; the extrusion portion 46 and the second matching surface together define a deformation gap 48. When the door body 3 is closed, the wall surface of the extrusion portion 46 away from the second matching surface is matched with the front end surface of the shell 2; under the mutual extrusion of the door body 3 and the shell 2, the extrusion portion 46 and the second matching surface are close to each other, and the deformation gap 48 is reduced. The above arrangement effectively increases the deformation capacity of the sealing element 4 and can increase its sealing performance.

[0183] In some embodiments of the present application, a mating protrusion 47 is formed on one side of the extrusion portion 46 close to the second mating surface; when the extrusion portion 46 is extruded close to the second mating surface, the mating protrusion 47 first mates with the second mating surface.

[0184] In some embodiments of the present application, Fig.11As shown, the sealing element 4 having the above extrusion portion 46 is also provided with a hook portion 44 extending from one end of the connection portion 43 away from the first connection strip 40 to a side away from the storage container 14 and close to the first connection strip 40. When the door body 3 is closed, the connection portion 43 extends into the storage chamber 20, and the hook portion 44 is squeezed by the inner wall of the shell to seal with the inner wall of the shell 2.

[0185] In some embodiments of the present application, Fig.12 As shown, the first mating strip 41 is located on the side of the first connecting strip 40 close to the housing 2. A sealing groove 45 is provided on the side of the first mating strip 41 close to the housing 2. The housing 2 has a sealing convex strip 22 surrounding the storage port 21 at one end close to the door body 3. When the door body 3 is closed, the sealing convex strip 22 on the housing 2 is installed in the sealing groove 45, and the sealing groove 45 and the sealing convex strip 22 are sealed and matched, effectively ensuring the sealing of the connection between the sealing element 4 and the housing 2.

[0186] In some embodiments of the present application, a recessed strip is formed on the wall surface of the sealing convex strip 22 opposite to the door body 3 to increase the matching area of ​​the sealing convex strip 22 .

[0187] The sealing groove 45 has a first groove inner wall, and the first groove inner wall cooperates with the surface of the sealing convex strip 22 provided with the concave strip. After the sealing convex strip 22 is installed in the sealing groove 45, the sealing groove 45 is also squeezed and deformed due to the extrusion of the sealing element 4. When the extrusion force on the sealing element 4 is large enough, the first groove inner wall of the sealing groove 45 is deformed and can cooperate with the concave strip, increasing the contact area between the first groove inner wall of the sealing groove 45 and the sealing convex strip 22, and increasing the unevenness of the contact area between the first groove inner wall of the sealing groove 45 and the sealing convex strip 22. That is, the contact surface formed by the above setting is non-planar, which increases the number of turns of the contact surface and increases the contact area, thereby improving the sealing performance of the cooperation between the two.

[0188] In some embodiments of the present application, the low-pressure storage device is provided with a ventilation unit to control the disconnection or connection between the storage chamber 20 and the external environment. When the ventilation unit is closed, the ventilation unit disconnects the storage chamber 20 from the external environment, so that the gas in the storage chamber 20 is extracted through the exhaust device and a low-pressure environment is formed in the storage chamber 20. When the ventilation unit is opened, the ventilation unit connects the storage chamber 20 with the external environment, and the gas in the external environment enters the low-pressure storage device, and the difference between the atmospheric pressure of the external environment and the air pressure in the storage chamber 20 gradually decreases. At this time, when the user opens the low-pressure storage device, the resistance when the user pulls the drawer unit out of the storage chamber 20 is small, which is convenient for the user to perform the action of opening the door body 3.

[0189] In some embodiments of the present application, the ventilation unit is configured as an electronic ventilation unit 31; the controller can control the automatic opening or closing of the electronic ventilation unit 31 to achieve automatic control of the connection or disconnection between the storage chamber 20 and the external environment.

[0190] As a configurable mode, the electronic ventilation unit 31 is in a normally closed state. When the door body 3 is closed, when the electronic ventilation unit 31 is powered off, the storage chamber 20 is disconnected from the external environment, and the storage chamber 20 remains sealed. When the door body 3 is closed, when the electronic ventilation unit 31 is powered on, it generates an electromagnetic force that can overcome the elastic force of the spring inside the electronic ventilation unit 31, so that the inside of the low-pressure storage unit is connected to the outside. It can be configured that the electronic ventilation unit 31 is configured as an electronic ventilation valve.

[0191] In some embodiments of the present application, the electronic ventilation unit 31 is disposed on the outer wall of the housing 2 .

[0192] In some embodiments of the present application, a mounting seat is provided on the outer wall of the housing 2 , and the electronic ventilation unit 31 is fixed on the mounting seat.

[0193] In some embodiments of the present application, the mounting base includes a plurality of screw columns, which are integrally formed on the housing 2. The electronic ventilation unit 31 includes a mounting plate with screw holes formed thereon, the mounting plate cooperates with the screw columns, and the mounting plate is fixedly connected to the housing 2 by screws.

[0194] In some embodiments of the present application, a vibration damping member is disposed between the electronic ventilation unit 31 and the housing 2 to reduce vibration and noise caused by the operation of the electronic ventilation unit 31 .

[0195] In some embodiments of the present application, the vibration damper is made of EPDM, the most important characteristic of which is its excellent resistance to oxidation, ozone and corrosion.

[0196] In some embodiments of the present application, the low-pressure storage unit is provided with ventilation holes connecting the opposite sides thereof, so that when the door body 3 is closed, the ventilation unit opens the ventilation holes to connect the storage chamber 20 with the external environment, allowing external gas to enter the storage chamber 20 through the ventilation holes to balance the internal and external air pressures.

[0197] In some embodiments of the present application, the ventilation unit is configured as a mechanical button type ventilation unit, and by manually pressing the mechanical button, the ventilation hole connecting the inside and outside of the storage chamber 20 can be opened to balance the pressure difference between the inside and outside.

[0198] In some embodiments of the present application, the ventilation unit includes a pressing part, a conversion part and a sealing part. The pressing part moves along a straight line when an external force is applied; the conversion part is connected to the pressing part; the pressing part drives the conversion part to rotate when the pressing part moves along a straight line; the sealing part is arranged on the conversion part and is used to block or open the ventilation hole.

[0199] When the ventilation unit is opened, external force is applied to the pressing part to make the pressing part move in a straight line; the pressing part drives the conversion part to rotate, and at the same time, the conversion part drives the sealing part away from the vent, the vent is opened, the inner cavity of the low-pressure storage unit is connected to the external environment, the outside air enters the low-pressure storage unit through the vent, and the air pressure in the low-pressure storage unit increases.

[0200] In some embodiments of the present application, the ventilation unit includes a reset member; the reset member is configured as follows: when an external force acts on the pressing part to cause the pressing part to move in a straight line, the reset member undergoes elastic deformation and stores elastic potential energy; when the external force acting on the pressing part to cause the sealing part to open the vent hole is removed, the reset member releases the elastic energy and acts on the pressing part, so that the pressing part and the conversion part return to their initial positions, and the conversion part drives the sealing part to seal the vent hole.

[0201] In some embodiments of the present application, see Figure 3 As shown, a retractable guide rail device is provided between the storage container 14 and the housing 2, so that the drawer unit (door body 3 and storage container 14) can be smoothly pulled out of the housing 2 or pushed into the housing 2. Among them, the low-pressure storage device is provided with a locking structure, which is used to lock the door body 3 in a pre-locking position when the door body 3 closes the storage port 21 and the sealing element 4 is compressed to a certain length, and allows the door body 3 to continue to move a certain distance in the closing direction from the pre-locking position under the pushing action of the force.

[0202] When the locking structure locks the door body 3 in the pre-locking position, the sealing element 4 is in a compressed state under the action of the door body 3 and the housing 2 to ensure that the pre-locking position has a certain degree of sealing. When in the pre-locking position, the length by which the sealing element 4 is compressed is recorded as the pre-locking compression length L1, and the sealing state achieved is recorded as the pre-locking sealing state. The pre-locking compression length L1 is less than the maximum deformable stroke L0, so that when the door body 3 continues to move in the closing direction from the pre-locking position under the action of the force, the sealing element 4 is further compressed, and the sealing between the door body 3 and the housing 2 is enhanced.

[0203] When the door body 3 closes the storage port 21 and the sealing element 4 is compressed to a pre-locking compression length L1, the locking structure locks the door body 3 and the housing 2 at a pre-locking position to form a pre-locking sealing state.

[0204] In the pre-locked sealing state, the vacuum device is started, and the vacuum rate of the vacuum device is much greater than the speed at which the external atmosphere enters the storage chamber 20. The air pressure in the storage chamber 20 decreases, and the external atmospheric pressure is greater than the air pressure in the storage chamber 20. Under the pressure difference between the external atmospheric pressure and the air pressure in the storage chamber 20, the door body 3 is pushed to move, and the door body 3 drives the storage container 14 to produce a certain displacement along the first moving direction through the guide rail device, and the sealing element 4 is further compressed.

[0205] As described above, during the operation of the vacuum device, as the vacuum time of the vacuum device increases, the air pressure in the storage chamber 20 continues to decrease, the pressure difference between the external atmospheric pressure and the air pressure in the storage chamber 20 increases, and the sealing element 4 is continuously compressed.

[0206] After the vacuum device finishes working, a vacuum sealing state is formed. In the vacuum sealing state, the length of the sealing element 4 that is compressed is the vacuum compression length L2. Among them, the vacuum compression length L2 is greater than the pre-locking compression length L1. Compared with the sealing in the pre-locking sealing state, the sealing of the door body 3 and the shell 2 in the vacuum sealing state is enhanced, and the sealing of the closed storage space formed by the door body 3 and the shell 2 is increased, which can effectively extend the vacuum retention time. In the above, the locking operation is completed when the user closes the door body 3, and no additional locking operation is required, and the requirements for user operation are low; then, after the locking operation, the vacuum is fully utilized to form a pressure difference on the opposite sides of the door body 3 to form a high-sealing environment, thereby forming a low-pressure storage environment to meet the vacuum needs.

[0207] In some embodiments of the present application, the vacuum compression length L2 is not greater than the maximum deformable stroke L0 to ensure that the sealing element 4 is continuously compressed and the sealing performance is continuously increased during the process of the door body 3 changing from a pre-locking state to a vacuum sealing state.

[0208] The above scheme set up in the present application breaks the conventional setting method of forming a high-sealing environment before vacuuming (compared with the pre-locking state of the present application, the user applies external force to lock the door body 3 and the shell 2 through the locking device, applying greater pressure on the sealing element 4). The present invention only uses a locking structure with a small size, small locking force and a simple and convenient locking method to lock the door body 3 and the shell 2 to form a pre-locked sealing state condition, and then uses the negative pressure generated by vacuuming to form a high sealing condition to meet the vacuum sealing condition.

[0209] In some embodiments of the present application, the pre-locking compression length L1: the maximum deformable stroke L0∈[0.05, 0.7] any one of the values. According to the above arrangement, relative to the compression length of the sealing element 4 when the locking structure locks the door body 3 and the shell 2 in the pre-locking sealing state, the compression length of the sealing element 4 when the vacuum device vacuums to lock the door body 3 and the shell 2 from the pre-locking sealing state to the vacuum sealing state can be greater, that is, the external force required to achieve the pre-locking sealing state through the action of external force is small, which is convenient for the user to perform the closing action. The further sealing condition of the vacuuming is achieved by utilizing the internal and external air pressure difference generated by the vacuuming itself, making full use of the characteristics of the vacuuming itself.

[0210] In some embodiments of the present application, the pre-locking compression length L1∈(0, 2] any value thereof, unit: mm. With the above arrangement, when the door body 3 is closed, the door body 3 and the shell 2 squeeze the sealing element 4 and deform slightly to reach the pre-locking position. When the user pushes the drawer unit into the storage chamber 20, there is no need to deliberately operate to move the door body 3 to the pre-locking position, nor is there any need to deliberately increase the force to push the drawer unit, so that the door body 3 can be closed to the pre-locking position, so that the door body 3 and the shell 2 reach a pre-locking sealing state, thereby providing initial sealing conditions for vacuuming.

[0211] As a measurable method, when the door body 3 is open, the sealing element 4 is in a natural state; along the normal direction of the plane where the access port 13 is located, the size of the portion of the sealing element 4 that is squeezed by the door body 3 and the shell 2 is recorded as the natural length L`. When the door body 3 is in the pre-locking position, the sealing element 4 is squeezed by the door body 3 and the shell 2, and the size of the door body 3 portion that squeezes the sealing element 4 and the corresponding shell 2 portion along the normal direction of the plane where the access port 13 is located (the distance between the first mating surface and the second mating surface) is recorded as the pre-locking length L1`. Pre-locking compression length L1 = natural length L`-pre-locking length L1`.

[0212] In some embodiments of the present application, vacuum compression length L2-pre-lock compression length L1=vacuum variation ΔL. Wherein, vacuum variation ΔL∈(0, 2] any value, unit: mm.

[0213] As a measurable method, when the door body 3 is open, the sealing element 4 is in a natural state; along the normal direction of the plane where the access port 13 is located, the size of the portion of the sealing element 4 that is squeezed by the door body 3 and the shell 2 is recorded as the natural length L`. After the vacuuming is completed, the sealing element 4 is squeezed by the door body 3 and the shell 2, and the size of the door body 3 portion that squeezes the sealing element 4 and the corresponding shell 2 portion along the normal direction of the plane where the access port 13 is located (the distance between the first mating surface and the second mating surface) is recorded as the vacuum length L2`. Vacuum compression length L2 = natural length L`-vacuum length L2`, vacuum change ΔL = pre-lock length L1`-vacuum length L2`.

[0214] In some embodiments of the present application, the locking structure includes a first locking portion and a second locking portion; the first locking portion is fixedly connected to the drawer unit, and the second locking portion is fixedly connected to the housing 2. When the first locking portion and the second locking portion cooperate to lock, the drawer unit is locked with the housing 2; when the first locking portion and the second locking portion are unlocked, the drawer unit is unlocked with the housing 2.

[0215] In some embodiments of the present application, the guide rail device has an outer rail 35 and an inner rail 33. The outer rail 35 is fixedly connected to the inner wall of the housing, the inner rail 33 is fixedly connected to the storage container 14, and the outer rail 35 and the inner rail 33 are movably connected.

[0216] In some embodiments of the present application, the first locking portion is disposed on the inner rail 33 .

[0217] In some embodiments of the present application, the second locking portion is disposed on the outer rail 35 .

[0218] During the process of opening the door body 3, the locking structure is unlocked, the door body 3 moves along the first moving direction, the door body 3 drives the storage container 14 to move along the first moving direction, the storage container 14 drives the inner rail 33 to move along the first moving direction, the inner rail 33 moves relative to the outer rail 35 along the first moving direction toward the side away from the rear wall of the shell, and the storage container 14 is pulled out of the storage chamber 20, making it convenient for users to take and put items.

[0219] During the closing process of the door body 3, the door body 3 moves along the second moving direction, the door body 3 drives the storage container 14 to move along the second moving direction, the storage container 14 drives the inner rail 33 to move along the second moving direction, the inner rail 33 moves relative to the outer rail 35 along the second moving direction toward the side close to the rear wall of the shell, the storage container 14 is pushed into the storage chamber 20, and the first locking part gradually approaches the second locking part. When the door body 3 closes the storage port 21 and the sealing element 4 is compressed, the first locking part is locked with the second locking part, the locking structure locks the door body 3 in the pre-locking position, the sealing element 4 is compressed to the pre-locking compression length L1, the door body 3 is sealed and connected to the shell 2, and a pre-locking sealing state is formed. The above locking operation is completed during the process of the user closing the door body 3, forming the initial sealing condition of vacuuming, and no additional locking operation is required, and the requirements for user operation are low.

[0220] In this pre-locked sealing state, the vacuum device is started, and the vacuum rate of the vacuum device is much greater than the speed at which the external atmosphere enters the storage chamber 20. The air pressure in the storage chamber 20 decreases, and the atmospheric pressure of the external environment is greater than the air pressure in the storage chamber 20. Under the pressure difference between the atmospheric pressure of the external environment and the air pressure in the storage chamber 20, the door body 3 drives the storage container 14 to continue to move along the first moving direction through the guide rail device to produce a certain displacement, and the sealing element 4 is further compressed. As described above, after the locking structure locks the door body 3 and the shell 2, the vacuum is fully utilized to form a pressure difference on the opposite sides of the door body 3 to form a high-sealing environment, thereby forming a low-pressure storage environment, which not only meets the requirements of vacuuming, but also meets the sealing requirements after vacuuming, ensuring the air pressure maintenance effect.

[0221] After the vacuuming is completed, a vacuum sealing state is formed. In the vacuum sealing state, the length of the sealing element 4 compressed is the vacuum compression length L2. Among them, the vacuum compression length L2 is greater than the pre-locking compression length L1. In the vacuum sealing state, the sealing performance of the door body 3 and the shell 2 is enhanced, and the sealing performance of the closed storage space formed by the door body 3 and the shell 2 is increased, which can effectively extend the vacuum retention time.

[0222] In some embodiments of the present application, the guide rail device has an inner rail 33, a middle rail 34, and an outer rail 35. Among them, the outer rail 35 is fixedly connected to the inner wall of the shell, and the middle rail 34 is movably connected to the outer rail 35; the inner rail 33 is fixedly connected to the storage container 14 and movably connected to the middle rail 34. The middle rail 34 is arranged as above, and is movably connected to the inner rail 33 while being movably connected to the outer rail 35, which effectively extends the extension stroke of the guide rail device, and enables the storage container 14 to be completely withdrawn from the shell 2, which is convenient for checking or taking and placing items.

[0223] During the process of opening the door body 3, the locking structure is unlocked, the door body 3 moves along the first moving direction, the door body 3 drives the storage container 14 to move along the first moving direction, the storage container 14 drives the inner rail 33 to move along the first moving direction, the inner rail 33 moves a certain distance relative to the middle rail 34 along the first moving direction, the middle rail 34 moves a certain distance relative to the outer rail 35 along the first moving direction, and the storage container 14 is drawn out from the storage chamber 20, which is convenient for users to take and put items. As described above, during the process of opening the door body 3, the inner rail 33 moves a certain distance relative to the middle rail 34 along the first moving direction, and the middle rail 34 moves a certain distance relative to the outer rail 35 along the first moving direction, which effectively extends the extension stroke of the guide rail device, so that the storage container 14 can be completely drawn out from the storage chamber 20, which is convenient for users to check or take and put items.

[0224] During the closing process of the door body 3, the door body 3 moves along the second moving direction, the door body 3 drives the storage container 14 to move along the second moving direction, the storage container 14 drives the inner rail 33 to move along the second moving direction, the inner rail 33 moves a certain distance relative to the middle rail 34 along the second moving direction, the middle rail 34 moves a certain distance relative to the outer rail 35 along the second moving direction, the storage container 14 is pushed into the storage chamber 20, and the first locking part gradually approaches the second locking part. When the door body 3 closes the storage port 21 and the sealing element 4 is compressed, the first locking part is locked with the second locking part, the locking structure locks the door body 3 in the pre-locking position, the sealing element 4 is compressed by the pre-locking compression length L1, the door body 3 is sealed and connected to the shell 2, and a pre-locking sealing state is formed. The above locking operation is completed during the process of the user closing the door body 3, forming the initial sealing condition of vacuuming, and no additional locking operation is required, and the requirements for user operation are low.

[0225] In this pre-locked sealing state, the operation of the vacuum device is the same as described above (when the guide rail device is provided with only the inner rail 33 and the outer rail 35), and will not be described in detail here.

[0226] The above setting of the present application, compared with the conventional drawer-type non-low-pressure storage device, has no different requirements for the user's pushing operation when pushing the drawer unit. The drawer unit is only pushed to the pre-locking position by external force so that the locking structure locks the door body 3 and the shell 2, and no additional operation is required for locking (compared to the existing method where the user needs to apply additional external force to lock the door body 3 and the shell 2 through the locking device after the door body 3 closes the storage port 21). That is, the setting of the present application locks the door body 3 and the shell 2 when the user pushes the drawer unit to close, and the compressed part of the sealing element 4 forms a pre-locked sealing state; no other additional special operations are required to form a vacuum sealing condition. Then, the air pressure difference formed when the vacuum device is working causes the door body 3 and the shell 2 to further squeeze the sealing element 4, thereby improving the sealing and ensuring the vacuum degree.

[0227] In some embodiments of the present application, the locking structure is disposed on the guide rail device.

[0228] In some embodiments of the present application, Figure 13-Figure 22 As shown, the locking structure on the guide rail device is configured as a push-to-open locking structure. The initial state of the push-to-open locking structure is an unlocked state. Pressing the push-to-open locking structure once converts the unlocked state into a locked state; pressing the push-to-open locking structure again converts the locked state into an unlocked state. That is, the locking structure is configured to convert the push-to-open locking structure between the locked state and the unlocked state by pressing the push-to-open locking structure once.

[0229] In some embodiments of the present application, the push-to-lock structure is used to make the low-pressure storage device reach a pre-locked sealing state; then, the vacuum pump 32 is turned on to evacuate. After the evacuation is completed, the force formed by the pressure difference between the inside and outside of the storage chamber 20 acts on the door body 3, and the push-to-lock structure is pressed again.

[0230] In some embodiments of the present application, after the pressure inside and outside the storage chamber 20 is balanced by the ventilation unit (electronic ventilation unit 31 or mechanical button ventilation unit), the pressure inside and outside the storage chamber 20 tends to be balanced. At this time, the force of pressing the push-open locking structure again formed by the pressure difference between the inside and outside of the storage chamber 20 is removed.

[0231] In some embodiments of the present application, after the air pressure inside and outside the storage chamber 20 is balanced through the ventilation unit, the push-to-pop locking structure is unlocked, the first locking part pops open relative to the second locking part, and the door body 3 automatically pops open and separates from the shell 2 under the driving action of the first locking part, so that the low-pressure storage device can be automatically opened after the air pressure inside and outside the storage chamber 20 is balanced.

[0232] In some embodiments of the present application, as shown in the figure, the push-to-lock structure has a minimum pressing distance for converting the push-to-lock structure from a locked state to an unlocked state, and the minimum pressing distance is recorded as the unlocking stroke J0. That is, the push-to-lock structure in the locked state needs to be pressed by a distance not less than the unlocking stroke J0 to convert the push-to-lock structure to an unlocked state. That is, the push-to-lock structure locks the door body 3 and the housing 2 in the pre-locking position, and by applying an external force to the door body 3, the door body 3 is displaced relative to the housing 2 by a distance not less than the unlocking stroke J0. At this time, the external force applied to the door body 3 is released, the push-to-lock structure is unlocked, and the door body 3 is unlocked from the housing 2.

[0233] In some embodiments of the present application, when the door body 3 of the low-pressure storage device is in the pre-locking position, under the locking action of the push-to-lock structure, the door body 3 is locked with the housing 2, and the door body 3 and the housing 2 squeeze the sealing element 4 to form a pre-locking sealing state. At this time, the length of the sealing element 4 being compressed is the pre-locking compression length L1.

[0234] When the locking structure locks the door body 3 and the housing 2 and the air extraction device is working, the air pressure in the storage chamber 20 decreases. Under the pressure difference between the side of the door body 3 close to the external environment and the side of the door body 3 close to the storage chamber 20, the door body 3 drives the storage container 14 to move in the closing direction through the guide rail device. The sealing element 4 is further compressed, and the locking structure is pressed to produce a first displacement, and the low-pressure storage device is in a vacuum sealing state. At this time, the compressed length of the sealing element 4 reaches the vacuum compression length L2.

[0235] In some embodiments of the present application, L2-L1≥J0, that is, the first displacement is not less than the unlocking stroke J0, so that the push-to-lock structure is triggered to convert from a locked state to an unlocked state in the vacuum sealing state, so that when the internal and external pressure difference of the low-pressure storage device is released, the push-to-lock structure completes the unlocking action and drives the door body 3 to open automatically.

[0236] In some embodiments of the present application, when the low-pressure storage device is in a vacuum-sealed state, the pressure difference between the inside and outside of the low-pressure storage device acts on the push-to-pop lock structure through the door body 3, triggering the push-to-pop lock structure to pop open. That is, the lock structure of the low-pressure storage device in a vacuum-sealed state has been triggered to switch from a locked state to an unlocked state.

[0237] When the internal and external pressure difference of the low-pressure storage device is eliminated (for example, after the ventilation unit is opened to balance the internal and external pressures of the low-pressure storage unit), the force applied to the push-to-lock structure by the door body 3 is removed, the push-to-lock structure is unlocked, and the door body 3 automatically opens under the action of the push-to-lock structure.

[0238] In some embodiments of the present application, the sealing element 4 of the low-pressure storage device has a maximum deformable stroke L0, and the difference between the maximum deformable stroke L0 and the pre-locking compression length L1 is not less than the unlocking stroke J0 of the push-to-pop locking structure (L0-L1≥J0). The above arrangement enables the maximum displacement of the door body 3 in the pre-locking state that can move along the second moving direction to be not less than the unlocking stroke J0 of the push-to-pop locking structure, meeting the requirement of a single press unlocking stroke, and ensuring that the push-to-pop locking structure can be unlocked by push-to-pop.

[0239] In some embodiments of the present application, it can be set that L0-L1 is any value between 2mm and 3mm, and J0 is any value between 1mm and 2mm.

[0240] In some embodiments of the present application, after the internal and external pressures of the low-pressure storage device are balanced, the push-to-lock structure is still in a locked state. That is, under the action of the internal and external pressure difference of the low-pressure storage device on the door body 3, the sealing element 4 is squeezed, and its compression distance reaches the vacuum compression length L2. At this time, the internal and external pressure difference of the low-pressure storage device acts on the push-to-lock structure through the door body 3, but it is not enough to trigger the push-to-lock structure to pop open. At this time, the vacuum compression length L2 is less than the maximum deformation distance L0; L2-L1 is less than J0, and L0-L1 is greater than or equal to J0. This ensures that the push-to-lock structure can be unlocked under the action of an external force, and keeps the push-to-lock structure in a locked state when the internal and external pressure difference of the low-pressure storage device is released; the user can unlock the push-to-lock structure through the action of an external force to complete the opening of the door body 3.

[0241] In some embodiments of the present application, when the low-pressure storage unit is in a vacuum-sealed state, the pressure therein is recorded as a first pressure value. That is, when the vacuum device finishes vacuuming, the pressure inside the low-pressure storage unit is the first pressure value.

[0242] As the low-pressure storage device is placed for a longer time, external gas slowly enters the storage chamber 20, and the pressure value in the storage chamber 20 increases. When the pressure in the storage chamber 20 rises to a second pressure value, the vacuum device is started, so that the pressure in the storage chamber 20 is reduced again.

[0243] In some embodiments of the present application, the second pressure value is lower than the standard atmospheric pressure, and the second pressure value is greater than the first pressure value. The above arrangement enables the low-pressure storage unit to always keep its internal pressure lower than the standard atmospheric pressure when the door 3 is closed, so as to prolong the food preservation.

[0244] In the above process, when the pressure inside the storage chamber 20 increases to the second pressure value due to the entry of external gas, the door body 3 and the shell 2 still keep squeezing the sealing element 4, and the internal and external pressure difference of the low-pressure storage device still acts on the push-to-lock structure. The push-to-lock structure has not yet completed the unlocking action, and the door body 3 and the shell 2 still maintain a sealed connection. The sealing state at this time is higher than the pre-locking sealing state, meeting the sealing requirements of vacuuming. By restarting the vacuuming device, the pressure inside the low-pressure storage device is reduced again.

[0245] In some embodiments of the present application, when the vacuum device is working to evacuate, when the pressure value in the low-pressure storage unit is lower than the second pressure value (which can be set to 0.9atm), the pressure difference between the inside and outside of the low-pressure storage device does not trigger the spring-opening action of the push-to-pop locking structure under the action of the door body 3. That is, when the pressure value in the low-pressure storage unit is reduced to the second pressure value, the length of the sealing element 4 compressed is recorded as the air extraction compression length L3; wherein, L3<L2; L3-L1<J0.

[0246] In the above, L3<L2; L3-L1<J0, combined with L2-L1≥J0. The above configuration meets the sealing requirements of vacuuming on the one hand; on the other hand, when the internal and external pressure difference of the low-pressure storage device is released after vacuuming, the door body 3 can be opened automatically, meeting the user's need to open the drawer unit and facilitating the user's operation.

[0247] In the above, L3<L2; L3-L1<J0, combined with L2-L1<J0 and L0-L1≥J0. The above configuration meets the sealing requirements of vacuuming on the one hand; on the other hand, the door body 3 can remain locked when the internal and external pressure difference of the low-pressure storage device is released after vacuuming; the user needs to manually press the door body 3 to complete the operation of opening the drawer unit.

[0248] In some embodiments of the present application, during the process of vacuuming by the vacuum device, when the pressure value in the low-pressure storage unit is lower than the second pressure value (settable 0.9atm), the internal and external pressure difference of the low-pressure storage device has triggered the push-to-lock locking structure to change from a locked state to an unlocked state under the action of the internal and external pressure difference of the low-pressure storage device on the door body 3. However, the pressure acting on the opposite sides of the door body 3 still acts on the door body 3, and the door body 3 and the shell 2 are still sealed. The sealing state at this time is still higher than the pre-locking sealing state, which meets the sealing requirements of vacuuming. By restarting the vacuum device, the pressure in the low-pressure storage device is reduced again. That is, when the pressure value in the low-pressure storage unit is reduced to the second pressure value, the length of the compressed sealing element 4 is recorded as the vacuum compression length L3; wherein, L3<L2; L3-L1≥J0. The above settings meet the sealing requirements of vacuuming; on the other hand, when the internal and external pressure difference of the low-pressure storage device is released after vacuuming, the door body 3 can be opened automatically, meeting the user's needs to open the drawer unit and facilitating user operation.

[0249] In some embodiments of the present application, the vacuum device finishes vacuuming, the low-pressure storage unit is in a vacuum-sealed state, the internal pressure value of the low-pressure storage device is a first pressure value, denoted as P`1 (for example, 0.7-0.9atm, depending on the vacuum setting), and the pressure value outside the door body 3 of the low-pressure storage device is P`0 (for example, 1atm, which is the external environmental air pressure, which is relatively constant). The area of ​​the door body 3 is S, and the minimum force for the push-to-lock structure to be pressed to trigger the unlocking action is F1, F1≤(P`0-P`1)*S. The above settings enable the door body 3 of the low-pressure storage device to automatically pop open after the pressure inside and outside the low-pressure storage unit is balanced.

[0250] In some embodiments of the present application, the vacuum device finishes vacuuming, the low-pressure storage unit is in a vacuum-sealed state, the internal pressure value of the low-pressure storage device is a first pressure value, denoted as P`1 (for example, 0.7-0.9atm, which varies according to the vacuum setting), and the pressure value outside the door body 3 of the low-pressure storage device is P`0 (for example, 1atm, which is the external environmental air pressure, which is relatively constant). The area of ​​the door body 3 is S, and the minimum force of the push-to-lock structure to press and trigger the unlocking action is F1, F1>(P`0-P`1)*S. That is, the force on the door body 3 generated by vacuuming is less than the force of the push-to-lock structure to press and trigger the unlocking action, and the force on the door body 3 generated by vacuuming is insufficient to unlock the push-to-lock structure, so that the low-pressure storage device can remain locked after the ventilation unit is opened to balance the pressure difference between the inside and outside of the low-pressure storage unit.

[0251] In some embodiments of the present application, Figure 13-Figure 22 As shown, the push-to-lock structure is provided on the guide rail device. Here, a guide rail device having an outer rail 35, a middle rail 34 and an inner rail 33 is used as an example for explanation. The outer rail 35 is fixedly connected to the inner wall of the housing, and the middle rail 34 is movably connected to the outer rail 35; the inner rail 33 is fixedly connected to the storage container 14 and movably connected to the middle rail 34. The push-to-lock structure includes a first locking portion and a second locking portion, and the first locking portion cooperates with the second locking portion to unlock or lock.

[0252] In some embodiments of the present application, the second locking portion is disposed on an outer rail 35 fixedly connected to the housing 2 , and is disposed at an end of the outer rail 35 .

[0253] In some embodiments of the present application, the second locking portion is disposed at an end of the outer rail 35 close to the rear wall of the shell.

[0254] The guide rail device is arranged along a first moving direction; wherein, the direction of the guide rail device along the first moving direction is recorded as a longitudinal direction, and in the projection on the inner wall of the shell of the fixed guide rail device, the direction of the guide rail device perpendicular to the longitudinal direction is recorded as a transverse direction.

[0255] In some embodiments of the present application, the second locking portion includes a fixed seat 6 fixed on the outer rail 35 and located at one end of the outer rail 35 close to the rear wall of the shell, a slider 1 connected by an elastic member 70 and movably connected to the fixed seat 6 along the longitudinal movement direction of the outer rail 35, and a movable connecting rod 7 connected between the fixed seat 6 and the slider 1.

[0256] In some embodiments of the present application, the end of the movable link 7 close to the rear wall of the shell is provided with a first connecting shaft 71, and the end of the movable link 7 away from the rear wall of the shell is provided with a third connecting shaft and a second connecting shaft 72. The third connecting shaft is located at the side of the movable link 7 close to the inner wall of the shell fixedly connected to the outer rail 35, and the first connecting shaft 71 and the second connecting shaft 72 are located at the side of the movable link 7 away from the inner wall of the shell fixedly connected to the outer rail 35.

[0257] In some embodiments of the present application, the third connecting shaft and the second connecting shaft 72 share a common central axis.

[0258] In some embodiments of the present application, a reversing hook portion 62 and a guide portion are formed on the fixing seat 6. The reversing hook portion 62 includes a propulsion portion 61 for propulsing the first connecting shaft 71 toward the side close to the rear wall of the housing, a hook portion 62 for locking the first connecting shaft 71, and a retraction portion 63 for retracting the first connecting shaft 71 toward the side away from the rear wall of the housing. The propulsion portion 61 and the retraction portion 63 are both connected to the guide portion. The first connecting shaft 71 is slidably connected to the guide portion, the propulsion portion 61, the hook portion 62, and the retraction portion 63.

[0259] In some embodiments of the present application, the slider 1 is provided with a second limiting portion 68 extending in the transverse direction of the outer rail 35. The third connecting shaft is slidably connected in the second limiting portion 68 to move in the transverse direction of the outer rail 35 relative to the slider 1, and the third connecting shaft and the slider 1 move in the longitudinal direction relative to the outer rail 35 synchronously.

[0260] In some embodiments of the present application, the guide portion includes a first guide portion 64 and a second guide portion 65. The advancing portion 61 and the retreating portion 63 are both connected to the first guide portion 64, and the advancing portion 61 and the retreating portion 63 are located on opposite sides of the center trajectory of the first guide portion 64.

[0261] In some embodiments of the present application, the first guide portion 64 extends in the longitudinal direction of the outer rail 35, and the second guide portion 65 extends obliquely from one end of the first guide portion 64 away from the rear wall of the housing to one side away from the rear wall of the housing. That is, the second guide portion 65 is processed from one end of the first guide portion 64 away from the rear wall of the housing along the transverse direction of the outer rail 35.

[0262] In some embodiments of the present application, the second guide portion 65 and the propulsion portion 61 are located on the same side of the center trajectory of the first guide portion 64 .

[0263] In some embodiments of the present application, a first locking portion is provided at one end of the inner rail 33 close to the rear wall of the housing. The second connecting shaft 72 is slidably connected in the guide portion, and the second connecting shaft 72 and the first locking portion are slidably matched to lock or separate with the first locking portion, thereby locking or unlocking the door body 3 and the housing 2.

[0264] In some embodiments of the present application, the first locking portion has an opening for the second connecting shaft 72 to enter or be disengaged from the first locking portion. The opening of the first locking portion faces the rear wall of the housing. The first locking portion extends obliquely relative to the inner rail 33 toward a side away from the rear wall of the housing.

[0265] In some embodiments of the present application, in the projection of the inner wall of the housing fixed to the outer rail 35, the opening of the first locking portion and the end of the second guide portion 65 away from the rear wall of the housing are located on a straight line in the first moving direction. The end of the first locking portion away from the rear wall of the housing and the first guide portion 64 are located on a straight line in the first moving direction.

[0266] In some embodiments of the present application, Fig.19 As shown, when the door body 3 and the housing 2 are in the unlocked state, the push-to-lock structure is in the unlocked state, the first connecting shaft 71 of the movable link 7 is located in the first guide portion 64, the third connecting shaft is located in the second limiting portion 68 of the slider 1, and is located at the end of the second limiting portion 68 close to the end of the second guide portion 65 away from the rear wall of the housing, and the second connecting shaft 72 is located at the end of the second guide portion 65 away from the rear wall of the housing. The elastic member 70 is in a natural state, and the door body 3 and the housing 2 are in the process of opening from the locked state to the extreme position. At this time, the distance between the end face of the slider 1 away from the rear wall of the housing and the end face of the fixing seat 6 close to the rear wall of the housing is the largest.

[0267] When the door body 3 is pushed to close the storage opening 21, the inner rail 33 gradually shrinks into the outer rail 35, and the second connecting shaft 72 enters the first locking portion through the opening of the first locking portion. Under the guidance of the inclined first locking portion, the second connecting shaft 72 enters the end of the first locking portion away from its opening. At the same time, the second connecting shaft 72 moves along the second guide portion 65 to the side close to the rear wall of the shell, and drives the third connecting shaft to move along the second limiting portion 68 to the side away from the end of the second guide portion 65 away from the rear wall of the shell. At the same time, the slider 1 is driven by the third connecting shaft to move toward the side close to the rear wall of the shell, the elastic member 70 is compressed by the slider 1, and the first connecting shaft 71 moves along the first guide portion 64 to the side close to the rear wall of the shell.

[0268] As the inner rail 33 continues to move, the first connecting shaft 71 and the second connecting shaft 72 simultaneously move along the first guide portion 64 toward the side close to the rear wall of the housing, the slider 1 continues to move toward the side close to the rear wall of the housing, and the elastic member 70 continues to be compressed.

[0269] like Fig. 20As shown, the inner rail 33 continues to move, the first connecting shaft 71 enters the propulsion portion 61 from the first guide portion 64, the second connecting shaft 72 continues to move along the first guide portion 64 toward the side close to the rear wall of the shell, the slider 1 continues to move toward the side close to the rear wall of the shell, and the elastic member 70 continues to be compressed.

[0270] like Fig.21 As shown, when the first connecting shaft 71 moves to the limit position close to the rear wall of the shell, the external force is removed, and the elastic member 70 releases part of the elastic potential energy. Under the action of the restoring force of the elastic member 70, the slider 1 drives the movable connecting rod 7 to move to the side away from the rear wall of the shell through the second connecting shaft 72, and the movable connecting rod 7 drives the first connecting shaft 71 from the propulsion part 61 into the hook part 62, and is locked by the hook part 62, and the drawer unit is locked and cannot be pulled out. At this time, the elastic member 70 is still in a compressed state. At this time, the outer rail 35 is locked with the first locking part through the second connecting shaft 72 of the movable connecting rod 7. That is, at this time, the outer rail 35 is locked with the inner rail 33, the shell 2 is locked with the door body 3, and the sealing element 4 is compressed.

[0271] like Fig. 22 As shown, when the storage port 21 is opened, an external force is applied to the door body 3 toward the rear wall of the housing, and the external force acts on the movable link 7 through the door body 3, and the movable link 7 drives the first connecting shaft 71 to move out of the hook portion 62, and the elastic member 70 is further compressed. After the external force is removed (after the pressing is released), the elastic member 70 releases the elastic potential energy, and under the action of the restoring force of the elastic member 70, the first connecting shaft 71 enters the retracting portion 63 from the hook portion 62, and enters the first guide portion 64 from the retracting portion 63; under the driving action of the first connecting shaft 71 and the guiding action of the guide portion on the second connecting shaft 72, the second connecting shaft 72 first moves along the first guide portion 64 to the side away from the rear wall of the housing, and then moves along the second guide portion 65 to the side away from the rear wall of the housing; at the same time, the slider 1 is driven to move to the side away from the rear wall of the housing through the second connecting shaft 72. As described above, when the second connecting shaft 72 moves along the second guide portion 65 toward the side away from the rear wall of the shell, the second connecting shaft 72 moves relative to the second limiting portion 68 toward one end of the second limiting portion 68 close to the end of the second guide portion 65 away from the rear wall of the shell, and the second connecting shaft 72 moves relative to the first locking portion toward the opening of the first locking portion, and finally the second connecting shaft 72 disengages from the first locking portion, the second connecting shaft 72 is unlocked from the first locking portion, the outer rail 35 is unlocked from the inner rail 33, and the shell 2 is unlocked from the door body 3.

[0272] In the process of opening the storage opening 21, after the external force is removed, under the action of the elastic member 70, the inner rail 33 is automatically moved a certain distance away from the rear wall of the shell body by the movable connecting rod 7 relative to the outer rail 35, thereby driving the door body 3 to be bounced open.

[0273] In the above technical scheme, the push-rebound function of the guide rail is realized by utilizing the propulsion portion 61, the locking portion, the retracting portion 63, the guiding portion, the first locking portion with an opening, and the second limiting portion 68. Compared with the rebound slide rail with a movable hook and a press-locking component in the prior art, the number of movable components is reduced. On the one hand, it facilitates the assembly of the guide rail and is beneficial to improving the assembly efficiency. On the other hand, the number of movable components is reduced, thereby reducing the mold manufacturing cost of the movable components.

[0274] In some embodiments of the present application, the fixed seat 6 is provided with a pair of guide limit portions 15, and a guide rod 16 is movably provided in the guide limit portion 15; one end of the guide rod 16 is connected to the slider 1, and the other end is connected to the elastic member 70. The elastic member 70 is connected to the fixed seat 6 at one end away from the connection with the guide rod, and the elastic member 70 is located in the guide limit portion. The slider 1 is guided by the guide limit portion and the guide rod.

[0275] In some embodiments of the present application, the hook portion 62 is arranged on the side of the guide portion close to the rear wall of the shell and is arranged transversely along the outer rail 35, and the hook portion 62 protrudes to the side away from the rear wall of the shell. The propulsion portion 61 and the retraction portion 63 are arranged at both ends of the hook portion 62 in the transverse direction and are arranged longitudinally, and the two ends of the hook portion 62 are respectively connected to the middle positions of the propulsion portion 61 and the retraction portion 63, and the end of the guide portion close to the rear wall of the shell is respectively connected to the end of the propulsion portion 61 away from the rear wall of the shell and the end of the retraction portion 63 away from the rear wall of the shell.

[0276] A groove side surface of the hook portion 62 away from the rear wall of the shell is a V-shaped surface, and a groove side surface of the hook portion 62 close to the rear wall of the shell is a first guide inclined surface 74 inclined toward the side of the retraction portion 63 and toward the side of the rear wall of the shell, and a surface of the V-shaped surface close to the propulsion portion 61 faces the end of the propulsion portion 61 close to the shell 2 in the longitudinal direction, so that the first connecting shaft 71 enters the hook portion 62 when it moves from the propulsion portion 61 along the longitudinal direction to the side away from the rear wall of the shell; a surface of the V-shaped surface close to the retraction portion 63 faces the first guide inclined surface 74 in the longitudinal direction, so that the first connecting shaft 71 moves out of the hook portion 62 when it moves from the propulsion portion 61 along the longitudinal direction to the side away from the rear wall of the shell.

[0277] In some embodiments of the present application, a toggle block 8 is provided at one end of the inner rail 33 close to the rear wall of the shell, and the first locking portion is provided on the toggle block 8 .

[0278] By arranging a toggle block 8 at one end of the inner rail 33 close to the rear wall of the shell, the main body of the inner rail 33 and the toggle block 8 can be made of different materials. In particular, the toggle block 8 can be made of anti-friction material and the main body of the inner rail 33 can be made of conventional materials. This improves the sliding fit performance between the second connecting shaft 72 of the movable link 7 and the first locking portion on the one hand, and reduces the cost of the inner rail 33 on the other hand.

[0279] In some embodiments of the present application, the open end of the first locking portion is further provided with a second guiding slope for the second connecting shaft 72 to slide into the first locking portion when the drawer is closed.

[0280] As described above, by arranging a reversing hook portion 62 on the fixed seat 6, the advance and retreat and locking of the guide rail are smoothly realized, and by arranging a bent second guide portion 65 at one end of the guide portion of the fixed seat 6 away from the rear wall of the shell, in cooperation with the second limiting portion 68 and the first locking portion with an opening, the connection and disconnection of the movable guide rail 2 and the movable connecting rod 7 are smoothly realized, and the reliability of its operation is good.

[0281] In some embodiments of the present application, the guide rail device with a push-to-lock structure comprises two guide rails, an outer rail 35 and an inner rail 33 .

[0282] In some embodiments of the present application, the guide rail device with a push-to-lock structure is a three-section guide rail, which includes an outer rail 35 fixed to the inner wall of the shell, a movable middle rail 34 and an inner rail 33, a first locking portion is arranged at one end of the inner rail 33 close to the rear wall of the shell, and a second locking portion is arranged at one end of the outer rail 35 close to the rear wall of the shell.

[0283] like Figure 23-Figure 28 As shown, in some embodiments of the present application, the locking structure is set on the guide rail device as an example for explanation. The locking structure on the guide rail device is set as a self-locking locking structure. When the guide rail device with a self-locking locking structure is pushed to retract, it is first pushed by an external force. When the door body 3 moves to the first position, the self-locking function of the self-locking locking structure is triggered. The self-locking locking structure achieves automatic locking by its own structure, and no external force is required.

[0284] When a guide rail device with a self-locking locking structure is provided on the above low-pressure storage unit, when the door body 3 moves to the first moving position along the second direction under the action of an external driving force, the self-locking locking structure is triggered. At this time, the external driving force is removed, and the door body 3 continues to move automatically along the second moving direction under the action of the self-locking locking structure, and automatically closes to the pre-locking position, completing the locking of the door body 3 and the shell 2.

[0285] In some embodiments of the present application, Figure 23-Figure 28As shown, the self-locking structure is provided on the guide rail device. Here, the guide rail device having an outer rail 35, a middle rail 34 and an inner rail 33 is still used as an example for explanation. The outer rail 35 is fixedly connected to the inner wall of the housing, and the middle rail 34 is movably connected to the outer rail 35; the inner rail 33 is fixedly connected to the storage container 14 and movably connected to the middle rail 34.

[0286] The self-locking locking structure is configured as follows: during the process of the door body 3 closing from the open state, the door body 3 drives the storage container 14 to move, and the storage container 14 is pushed into the storage chamber 20; when the door body 3 moves to the first position, the self-locking function of the locking structure is triggered, and the locking structure drives the door body 3 to continue to automatically move a certain displacement in the closing direction, and then the door body 3 and the housing 2 are locked, and the sealing element 4 is squeezed by the door body 3 and the housing 2;

[0287] When the locking structure locks the door body 3 and the shell 2 and the vacuum device is working, the air pressure in the storage chamber 20 decreases. Under the action of the pressure difference between the side of the door body 3 close to the external environment and the side of the door body 3 close to the storage chamber 20, the door body 3 drives the storage container 14 to produce a certain displacement in the closing direction through the guide rail device, and the sealing element 4 is further compressed.

[0288] In some embodiments of the present application, the self-locking locking structure includes a first locking part and a second locking part. When the door body 3 moves to the first position, the first locking part triggers the second locking part. The second locking part drives the door body 3 to automatically continue to move a certain distance in the closing direction through the first locking part. After that, the first locking part and the second locking part complete the locking, so that the door body 3 and the shell 2 are locked in the pre-locking position.

[0289] In some embodiments of the present application, the second locking portion is disposed on an outer rail 35 fixedly connected to the housing 2 .

[0290] In some embodiments of the present application, the second locking portion is disposed at an end of the outer rail 35 close to the rear wall of the shell.

[0291] In some embodiments of the present application, the first locking portion is disposed at an end of the inner rail 33 close to the rear wall of the shell.

[0292] It should be noted that the self-locking locking structure in the embodiment here is different from the push-to-open locking structure in the above embodiment in that the self-locking locking structure in the embodiment here does not have the reversing hook portion 62, the movable connecting rod 7, and the first connecting shaft 71 provided on the movable connecting rod 7. Hereinafter, the self-locking locking structure will be described with the same component names as in the structural description of the above push-to-open locking structure.

[0293] In some embodiments of the present application, the second locking portion includes a fixing seat 6 fixedly disposed on the outer rail 35 and located at one end of the outer rail 35 close to the rear wall of the shell, a slider 1 connected by an elastic member 70 and movably connected to the fixing seat 6 along the longitudinal movement direction of the outer rail 35, and a limiting member 9 connected between the fixing seat 6 and the slider 1.

[0294] In some embodiments of the present application, a limiting plate 91 surrounding the periphery of the limiting member 9 is provided on the limiting member 9 , and the limiting member 9 includes a second connecting shaft 72 and a third connecting shaft located on both sides of the limiting plate 91 .

[0295] In some embodiments of the present application, the second connecting axis 72 and the third connecting axis are co-axial.

[0296] In some embodiments of the present application, a first guide portion 64 and a second guide portion 65 are formed on the fixing seat 6. The third connecting shaft is slidably connected to the first guide portion 64 and / or the second guide portion 65; and the second connecting shaft 72 is slidably matched with the first locking portion to lock or separate with the first locking portion, so that the door body 3 and the housing 2 are locked or unlocked.

[0297] In some embodiments of the present application, the first locking portion has an opening for the second connecting shaft 72 to enter or be disengaged from the first locking portion. The opening of the first locking portion faces the rear wall of the housing. The first locking portion extends obliquely relative to the inner rail 33 toward a side away from the rear wall of the housing.

[0298] In some embodiments of the present application, in the projection of the inner wall of the housing fixed to the outer rail 35, the opening of the first locking portion and the end of the second guide portion 65 away from the rear wall of the housing are located on a straight line in the first moving direction. The end of the first locking portion away from the rear wall of the housing and the first guide portion 64 are located on a straight line in the first moving direction.

[0299] In some embodiments of the present application, the first guide portion 64 extends along the longitudinal centerline of the outer rail 35 , and the second guide portion 65 extends obliquely from one end of the first guide portion 64 away from the rear wall of the shell to a side away from the rear wall of the shell.

[0300] In some embodiments of the present application, the slider 1 has a second limiting portion 68 extending in the transverse direction of the outer rail 35 . The second connecting shaft 72 is slidably connected in the second limiting portion 68 to move relative to the slider 1 in the transverse direction of the outer rail 35 .

[0301] In some embodiments of the present application, when the locking structure is locked, a buffer block 51 is provided at a position on the fixing seat 6 that cooperates with the slider 1. The buffer block 51 itself has good elasticity and blocks the slider 1 to reduce noise.

[0302] In some embodiments of the present application, when the door body 3 and the housing 2 are in the unlocked state, the second connecting shaft 72 is located in the second limiting portion 68 of the slider 1 and is located at an end of the second limiting portion 68 close to the end of the second guide portion 65 away from the rear wall of the housing, and the third connecting shaft is located at an end of the second guide portion 65 away from the rear wall of the housing. The elastic member 70 is in a stretched state, and the door body 3 and the housing 2 are in the process of opening from the locked state to the limit position. At this time, the distance between the end face of the slider 1 away from the rear wall of the housing and the end face of the fixing seat 6 close to the rear wall of the housing is the largest.

[0303] When the door body 3 is pushed to its closed storage opening 21, the inner rail 33 approaches the outer rail 35; when the door body 3 moves to the first position, the self-locking function of the locking structure is triggered, and the second connecting shaft 72 enters the first locking portion through the opening of the first locking portion, and under the guidance of the inclined first locking portion, the second connecting shaft 72 enters the end of the first locking portion away from its opening. At the same time, the third connecting shaft moves along the second guide portion 65 to the side close to the rear wall of the shell, and drives the second connecting shaft 72 along the second limiting portion 68 to the side away from the end of the second guide portion 65 away from the rear wall of the shell. At the same time, the slider 1 is driven to move toward the side close to the rear wall of the shell through the second connecting shaft 72, and the elastic member 70 releases its elastic energy and contracts. When the elastic member 70 drives the slider 1 to move toward the side close to the rear wall of the shell, the slider 1 drives the first locking portion to move toward the side close to the rear wall of the shell through the second connecting shaft 72, and at the same time drives the inner rail 33 and the storage container 144 fixed to the inner rail 33 to move toward the side close to the rear wall of the shell. When the slider 1 is in contact with the fixing seat 6 , the length of the elastic member 70 is the shortest, the outer rail 35 and the inner rail 33 are locked, the housing 2 and the door body 3 are locked, and the door body 3 is in the pre-locking position.

[0304] When the door body 3 is in the pre-locked sealing state and the storage port 21 is opened, an external force away from the rear wall of the housing is applied to the door body 3 to pull the drawer unit. The external force acts on the first locking portion through the door body 3, and the first locking portion moves along the first moving direction. The first locking portion drives the second connecting shaft 72 to move synchronously, and the second connecting shaft 72 drives the slider 1 to move synchronously. The slider 1 drives the third connecting shaft to move along the first guide portion 64 along the first moving direction first, and then along the second guide portion 65. When the third connecting shaft enters the second guide portion 65 from the first guide portion 64, the third connecting shaft drives the second connecting shaft 72 to move a certain distance in the lateral direction of the outer rail 35, and the second connecting shaft 72 slides out from the first locking portion through the opening thereon. At this time, the first locking portion and the second locking portion are separated. Under the pull of the external force, the drawer unit continues to open, and the door body 3 and the housing 2 are unlocked. At this time, the third connecting shaft is located in the second guide portion 65, and the elastic member 70 remains in a stretched state.

[0305] In some embodiments of the present application, a toggle block 8 is provided at one end of the inner rail 33 close to the rear wall of the shell, and the first locking portion is provided on the toggle block 8 .

[0306] By arranging a toggle block 8 at one end of the inner rail 33 close to the rear wall of the shell, the main body of the inner rail 33 and the toggle block 8 can be made of different materials. In particular, the toggle block 8 can be made of anti-friction material and the main body of the inner rail 33 can be made of conventional materials. This improves the sliding fit performance between the third connecting shaft of the movable link 7 and the first locking portion on the one hand, and reduces the cost of the inner rail 33 on the other hand.

[0307] In some embodiments of the present application, the open end of the first locking portion is further provided with a second guiding slope for the third connecting shaft to slide into the first locking portion when the drawer is closed.

[0308] As described above, by providing a bent second guide portion 65 at one end of the guide portion of the fixed seat 6 away from the rear wall of the shell, in cooperation with the second limiting portion 68 and the first locking portion with an opening, the connection and disconnection between the inner rail 33 and the third connecting shaft are smoothly achieved, and the operation reliability is good.

[0309] In some embodiments of the present application, Figure 29-Figure 35 As shown, the locking structure on the guide rail device is set to a locking structure with double self-locking functions. The locking structure has a first-level locking and a second-level locking. The locking structure is configured as:

[0310] When the door body 3 is closed from the open state, the door body 3 drives the storage container 14 to move in the closing direction, and the storage container 14 is pushed into the storage chamber 20; when the door body 3 closes the storage opening 21 and the sealing element 4 is squeezed by the door body 3 and the housing 2, the locking structure locks the door body 3 and the housing 2 through the first-level locking;

[0311] When the locking structure locks the door body 3 and the shell 2 and the vacuum device is working, the air pressure in the storage chamber 20 decreases. Under the action of the pressure difference between the side of the door body 3 close to the external environment and the side of the door body 3 close to the storage chamber 20, the door body 3 drives the storage container 14 to produce a certain displacement in the closing direction through the guide rail device, the sealing element 4 is further compressed, and the locking structure further locks the door body 3 and the shell 2 through the second-level locking.

[0312] In some embodiments of the present application, when the vacuum device finishes working, the door body 3 completes the second-stage locking, and the door body 3 is in a vacuum-sealed state. At this time, the door body 3 of the low-pressure storage device is affected by the second-stage locking on the one hand, and by the pressure difference between the inside and the outside, which effectively ensures the sealing of the door body 3 and the shell 2, reduces the air leakage, and prolongs the pressure holding time.

[0313] In some embodiments of the present application, when the door body 3 is closed, the inner rail 33 moves in the closing direction. When the door body 3 moves to the first position, the first-level locking is triggered, and the door body 3 is automatically moved by the first distance, and the inner rail 33 and the outer rail 35 complete the first-level locking. After the first-level locking, the inner rail 33 continues to move a second distance in the closing direction, and the second-level locking is triggered. Under the action of the second-level locking function, the inner rail 33 continues to move a third distance in the closing direction, so that the inner rail 33 and the outer rail 35 complete the second-level locking. The locking structure of the guide rail device with a double self-locking function can realize the double locking function, improve the self-locking effect, promote the complete closure of the drawer unit, enhance the stability and reliability of the use performance of the drawer unit, and ensure the use quality of the product.

[0314] In some embodiments of the present application, the second distance is 0, that is, the locking structure completes the first level locking and triggers the second level locking at the same time.

[0315] In some embodiments of the present application, when the inner rail 33 and the outer rail 35 complete the first-level locking and the second-level locking has not yet been triggered, the door body 3 reaches the pre-locking position. When the door body 3 is in the pre-locking position, the vacuum device works to vacuum the storage chamber 20. As the vacuum device works, the pressure difference on the two sides of the door body 3 increases. The door body 3 moves a certain distance in the closing direction and triggers the second-level locking. Under the action of the pressure difference between the inside and outside of the low-pressure storage unit and the second-level self-locking function of the locking structure, the reaction force of the sealing element 4 is overcome, and the locking structure drives the door body 3 to automatically move a certain distance in the closing direction to complete the second-level locking.

[0316] In some embodiments of the present application, after the inner rail 33 and the outer rail 35 complete the first-stage locking, the inner rail 33 continues to move a second distance in the closing direction relative to the outer rail 35 to trigger the second-stage locking, but the second-stage locking is not completed due to the resistance of the compressed sealing element 4, and the door body 3 reaches the pre-locking position. At this time, when the door body 3 is in the pre-locking position, the vacuum device works to vacuum the storage chamber 20. Under the pressure difference between the inside and outside of the low-pressure storage unit and the second-stage self-locking function of the locking structure, the reaction force of the sealing element 4 is overcome, and the door body 3 is driven to further move a certain distance in the closing direction. The sealing element 4 is further compressed. When the vacuum device finishes working, the door body 3 completes the second-stage locking.

[0317] In some embodiments of the present application, the guide rail device includes an outer rail 35 and an inner rail 33 , and the outer rail 35 and the inner rail 33 are slidably connected via a middle rail 34 .

[0318] The first locking portion comprises a toggle block 8 , which is mounted on one end of the inner rail 33 close to the rear wall of the housing.

[0319] The second locking part includes a fixing seat 6, a slider 1, and a stopper 9. The fixing seat 6 is fixed to one end of the outer rail 35 close to the rear wall of the housing, and one end of the fixing seat 6 away from the rear wall of the housing is provided with a guide member 60 extending in the same direction as the direction of the inner rail 33. The guide member 60 is provided with a first guide portion 64 in the same direction as the guide member 60, and the slider 1 is slidably mounted on the guide member 60, and the guide member 60 and the slider 1 are connected by the stopper 9, and the end of the slider 1 close to the rear wall of the housing is connected to the fixing seat 6 by an elastic member 70.

[0320] A second guide portion 65 is provided at one end of the first guide portion 64 away from the rear wall of the housing, and the second guide portion 65 is located at a side of the first guide portion 64 away from the bottom wall of the housing 2, and is in communication with the first guide portion 64. The toggle block 8 can engage the limiting member 9 in the second guide portion 65 so that the slider 14 is engaged at the end of the first guide portion 64 away from the rear wall of the housing, and can disengage the limiting member 9 from the second guide portion 65 so that the elastic member 70 can drive the slider 1 to retract the inner rail 33.

[0321] In some embodiments of the present application, a third locking portion 90 is hingedly connected to the fixing seat 6 , a mounting groove 66 is provided on the fixing seat 6 , and a torsion spring 80 is placed in the mounting groove 66 to connect the fixing seat 6 and the third locking portion 90 .

[0322] The two ends of the torsion spring 80 are bent into connecting torsion arms, one of which is clamped in a connecting hole set on the fixing seat 6, and the other is clamped in a connecting hole set on the third locking portion 90. A second limiting portion is provided on the inner groove wall that defines the installation groove 66.

[0323] In some embodiments of the present application, a traction recess 81 is provided at one end of the toggle block 8 close to the rear wall of the shell, a guide portion 82 is provided at one end of the traction recess 81 close to the rear wall of the shell, and a first locking column 83 and a second locking column 84 are provided on the third locking portion 90 corresponding to the traction recess 81.

[0324] In some embodiments of the present application, a limiting plate 91 surrounding the periphery of the limiting member 9 is provided on the limiting member 9 , and the limiting member 9 includes a second connecting shaft 72 and a third connecting shaft located on both sides of the limiting plate 91 .

[0325] The limiting member 9 includes a limiting plate 91, and a shifting block 92 and a positioning shaft 93 are provided on the side of the limiting plate 91 facing the slider 1; wherein the shifting block 92 is located at the end of the limiting member 9 close to the rear wall of the housing, and the positioning shaft 93 is located at the end of the limiting member 9 away from the rear wall of the housing. A convex block 94 and a rotating shaft 95 are provided on the side of the limiting plate 91 facing the guide member 60; wherein the convex block 94 is located at the end of the limiting plate 91 close to the rear wall of the housing, and the rotating shaft 95 is located at the end of the limiting plate 91 away from the rear wall of the housing.

[0326] In some embodiments of the present application, the rotating shaft 95 is arranged concentrically with the positioning shaft 93 .

[0327] In some embodiments of the present application, the two ends of the protrusion 94 are symmetrical arc-shaped, the slider 1 is provided with a second limiting portion 68 arranged laterally along the outer rail 35, and the slider 1 is provided with a positioning hole, and the positioning hole and the second limiting portion 68 are distributed longitudinally along the outer rail 35.

[0328] The shift block 92 of the limit member 9 is installed in the second limiting portion 68, the positioning shaft 93 is arranged in the positioning hole, the protrusion 94 and the rotating shaft 95 are slidably assembled in the first guide portion 64 or the second guide portion 65. When the limit member 9 is located at the end of the first guide portion 64 away from the rear wall of the shell, it can rotate as a whole with the rotating shaft 95 as the rotating axis so that the protrusion 94 can be rotated into the second guide portion 65 and form a clearance fit with the second guide portion 65.

[0329] In some embodiments of the present application, the end of the toggle block 8 close to the rear wall of the housing is set as an open slot structure, the bottom slot surface of the open slot structure is provided with a toggle tooth 85, and the inner side of the toggle tooth 85 away from the rear wall of the housing is provided with a locking inclined slot 86. When the outer rail 35 and the inner rail 33 are closed, the toggle block 92 of the limiter 9 is embedded in the locking inclined slot 86.

[0330] When the outer rail 35 and the inner rail 33 are closed, the second lock column 84 of the third locking portion 90 is engaged in the traction recess 81 of the toggle block 8, and the guide portion 82 is located between the first lock column 83 and the second lock column 84, the slider 1 and the limit member 9 are located together at one end of the guide member 60 close to the rear wall of the shell, the protrusion 94 and the rotating shaft 95 of the limit member 9 are both located in the first guide portion 64, and the toggle block 92 of the limit member 9 is located in the locking inclined groove 86 of the toggle block 8.

[0331] The opening process of the slide rail is described in detail below: when the inner rail 33 is pulled open, the toggle block 8 drives the third locking portion 90 to rotate through the traction recess 81 and the second locking column 84, so that the torsion spring 80 rotates toward the second limiting portion with the connecting hole set on the fixing seat 6 as the rotation point, and the torsion spring 80 crosses the critical point of rotation and turns to the second limiting portion, and stops moving due to the restriction of the second limiting portion. At the same time, the traction recess 81 of the toggle block 8 is separated from the second locking column 84 of the third locking portion 90, and the toggle block 8 moves with the inner rail 33. The toggle block 8 drives the slider 1 to move along the first guide portion 64 of the guide member 60 through the limiting member 9. As the toggle block 8 moves, the toggle block 8 can engage the limiting member 9 in the second guide portion 65, so that the slider 1 is stuck in the first guide portion 64 away from the rear wall of the shell (in the second guide portion 65), and the toggle block 8 is separated from the slider 1.

[0332] The inner rail 33 continues to move in the opening direction, and the toggle block 8 installed on one end of the inner rail 33 near the rear wall of the shell moves forward simultaneously with the inner rail 33. Since the toggle block 92 of the limiting member 9 is located in the locking bevel groove 86 and the protrusion 94 and the rotating shaft 95 of the limiting member 9 are both located in the first guide portion 64 of the guide member 60, when the toggle block 8 moves forward, the tooth surface of the toggle tooth 85 located on the rear side of the locking bevel groove 86 synchronously pushes the toggle block 92 and the entire limiting member 9 to move forward along the first guide portion 64, so that the limiting member 9 drives the slider 1 to move forward along the guide member 60, and the elastic member 70 is stretched.

[0333] When the limit member 9 moves to the side away from the rear wall of the shell body until the rotating shaft 95 enters the connecting position between the first guide part 64 and the second guide part 65, at this time, since the protrusion 94 is still located in the first guide part 64, the entire limit member 9 is constrained by the first guide part 64 and drives the slider 1 to move as a whole along the first moving direction along the linear guide part 60 until the protrusion 94 of the limit member 9 completely enters the connecting position between the first guide part 64 and the second guide part 65.

[0334] At this time, since the rotating shaft 95 of the limit member 9 has passed the position of the second guide portion 65 and entered the end of the first guide portion 64 away from the rear wall of the shell body, if the inner rail 33 is continued to be pulled along the first moving direction, the toggle tooth 85 of the toggle block 8 further pushes the toggle block 92 along the first moving direction, and the rotating shaft 95 of the limit member 9 is limited by the end face of the second guide portion 65 away from the rear wall of the shell body and can no longer move forward, so that under the push of the toggle tooth 85, the limit member 9 rotates clockwise with the rotating shaft 95 as the rotating axis until the protrusion 94 of the limit member 9 rotates into the second guide portion 65 and is limited in an inclined shape with a lower front and a higher rear. While the limit member 9 rotates, the toggle block 92 synchronously rotates clockwise in the second limiting portion 68 of the slider 1 and disengages from the locking inclined groove 86. At this time, the elastic member 70 is in a fully stretched state, and then the inner rail 33 continues to be pulled along the first moving direction until it is fully opened.

[0335] The contraction process of the slide rail is described in detail below: as the inner rail 33 contracts, the shifting block 92 of the limiting member 9 is inserted into the open groove structure of the shifting block 8 on the inner rail 33, and the limiting member 9 is in an inclined limiting state.

[0336] The inner rail 33 continues to move backward, and the shift block 92 of the limit member 9 passes over the tooth top surface of the shift tooth 85 and enters the locking inclined groove 86 of the shift block 83. As the shift block 8 moves further backward, the shift block 92 is subjected to the downward thrust of the top inclined surface of the locking inclined groove 86 and rotates counterclockwise around the rotating shaft 95 as the rotating axis until the protrusion 94 of the limit member 9 is horizontal, that is, the entire limit member 9 is horizontal, and then the protrusion 94 moves backward into the first guide portion 64 driven by the shift block 8.

[0337] At this time, under the action of the restoring force of the elastic member 70, the elastic member 70 pulls the slider 1 and the limit member 9 to automatically shrink. At the same time, the shifting block 92 of the limit member 9 pushes the shifting tooth 85 to translate backward in the locking inclined groove 86 of the shifting block 8, and finally drives the inner rail 33 to automatically shrink along the second moving direction.

[0338] When the toggle block 8 shrinks to the end of the first guide portion 64 along with the slider 1, the guide portion 82 of the toggle block 8 abuts against the first locking column 83 of the third locking portion 90, pushing the third locking portion 90 to rotate, so that the torsion spring 80 rotates away from the second limiting portion with the connecting hole set on the fixing seat 6 as the rotation point, causing the torsion spring 80 to disengage from the second limiting portion, and the torsion spring 80 rotates to the side away from the second limiting portion across the critical point of rotation. The torsion spring 80 drives the third locking portion 90 to rotate, and the second locking column 84 of the third locking portion 90 is engaged in the traction recess 81 of the toggle block 8, so that the third locking portion 90 shrinks the inner rail 33 through the toggle block 8, and the torsion spring 80 is finally stopped by the resistance of the sealing element 4 that prevents the inner rail 33 from moving along the second moving direction.

[0339] In the guide rail device with a locking structure having a double self-locking function, the toggle block 8 can engage the limit member 9 in the second guide portion 65, so that the slider 1 is clamped at one end of the first guide portion 64 away from the rear wall of the shell, and the limit member 9 can be disengaged from the second guide portion 65 so that the elastic member 70 can drive the slider 1 to retract the inner rail 33.

[0340] As the spring retracts the inner rail 33, the inner rail 33 retracts and moves to the end position, the guide portion of the toggle block 8 abuts against the second locking column 84 of the third locking portion 90, pushing the third locking portion 90 to rotate so that the torsion spring 80 disengages from the second limiting portion of the mounting groove 66, and the second locking column 84 engages in the traction recess 81, and the torsion spring 80 drives the third locking portion 90 to rotate so that the third locking portion 90 retracts the inner rail 33. At the end position of the retraction of the inner rail 33, the torsion spring 80 drives the retracted inner rail 33, giving the inner rail 33 enough closing force, so that the drawer unit can be well closed with the shell 2, achieving high-requirement sealing, further increasing the high sealing performance of the low-pressure storage device in a vacuum sealed state, and effectively ensuring the preservation time.

[0341] In some embodiments of the present application, a first limiting portion is provided on the groove wall defining the installation groove 66. When the outer rail 35 and the inner rail 33 are closed, the torsion spring 80 is limited by the first limiting portion. During the opening process of the outer rail 35 and the inner rail 33, the torsion spring 80 is separated from the first limiting portion and is not limited by the first limiting portion, passes the critical point of rotation and turns to the second limiting portion, and is limited by the second limiting portion and stops moving.

[0342] In some embodiments of the present application, when the vacuum device finishes working, the low-pressure storage device is in a vacuum sealing state, and the torsion spring 80 is limited by the first limiting portion.

[0343] In some embodiments of the present application, when the vacuum device vacuums air to form a pressure difference between the inside and outside of the low-pressure storage unit, under the effect of the pressure difference between the inside and outside of the low-pressure storage unit on the door body 3, the door body 3 drives the inner rail 33 to continue to move in the closing direction, and the connecting torsion arm of the torsion spring 80 overcomes the effect of the first limiting portion and continues to move in the direction away from the second limiting portion. When vacuuming is completed, the connecting torsion arm of the torsion spring 80 is located on the side of the first limiting portion away from the second limiting portion.

[0344] In some embodiments of the present application, a third limiting portion (not shown in the figure) is provided on the groove wall defining the installation groove 66, and the third limiting portion is located on the side of the first limiting portion away from the second limiting portion. When the vacuum is evacuated to form a pressure difference between the inside and outside of the low-pressure storage unit, the door body 3 drives the inner rail 33 to continue to move in the closing direction, and the connecting torsion arm of the torsion spring 80 overcomes the effect of the first limiting portion and continues to move in the direction away from the second limiting portion. When the vacuum is completed, the connecting torsion arm of the torsion spring 80 moves to the third limiting portion and is limited by the third limiting portion.

[0345] In some embodiments of the present application, the third locking portion 90 is rotatably connected to the outer rail 35. When the first locking portion and the second locking portion complete the first level of locking, the first locking portion on the inner rail 33 compresses the torsion spring 80 disposed at one end of the outer rail 35 close to the rear wall of the shell through the second locking portion and the third locking portion 90, so that the torsion spring 80 is compressed in the radial direction. When the first locking portion and the second locking portion are locked to complete the first level of locking, the torsion spring 80 reaches the critical value of the torsion spring 80. Thereafter, the torsion spring 80 begins to stretch, and the torsion spring 80 drives the inner rail 33 to continue to move a certain distance in the closing direction through the second locking portion and the first locking portion, completing the second level of locking. The above arrangement enables the door body 3 to automatically complete the second level of locking after the first level of locking is completed after closing.

[0346] The locking structure with double self-locking function has a large locking force, with a spring force of 15-20N, and is reliable, stable and has a long service life.

[0347] In some embodiments of the present application, a first position detection device is provided on the low-pressure storage unit for detecting whether the door body 3 is closed to a specific position. Optionally, the first position detection device is used to detect whether the door body 3 reaches a pre-locking position.

[0348] In some embodiments of the present application, the first position detection device is configured as a proximity position detection device. Specifically, the first position detection device includes a proximity detection device disposed on the housing 2 and a proximity sensor disposed on the drawer unit. When the drawer unit is closed, the proximity sensor corresponds to the position of the proximity detection device and acts on the proximity detection device to transmit a signal that the drawer unit is closed to the pre-locked position. When the drawer unit is opened, the proximity sensor is away from the proximity detection device and cannot act on the proximity detection device, and the proximity detection device has no signal transmission.

[0349] In some embodiments of the present application, the proximity position detection device is configured as any one of a photoelectric proximity switch, an eddy current proximity switch, a capacitive proximity switch, and a Hall proximity switch.

[0350] In some embodiments of the present application, Figure 36-Figure 39 As shown, the locking structure on the guide rail device is set as a lock switch type locking structure. It can be set that when the lock switch type locking structure is locked, the door body 3 reaches the pre-locking position.

[0351] The first-stage locking method of the locking structure with the double self-locking function is set as above. The inner rail 33 is provided with a first locking part, and the outer rail 35 is provided with a second locking part. When the door body 3 is closed, under the push of external force, after the door body 3 moves a first distance, the first locking part cooperates with the second locking part to complete the locking. A buffer block 51 is provided at one end of the inner rail 33 or the outer rail 35 close to the rear wall of the housing. After the first locking part and the second locking part cooperate, the buffer block 51 can be further compressed.

[0352] As a configurable manner, the first locking portion is provided with a locking groove 96, and the second locking portion is provided with a locking slide 97. When the first locking portion and the second locking portion cooperate, the locking slide 97 is elastically deformed and enters the locking groove 96, and then the locking slide 97 is at least partially restored to complete the locking with the second locking portion, and the door body 3 and the housing 2 are locked in the pre-locking position.

[0353] Then the vacuum device works to vacuum, the air pressure in the low-pressure storage unit decreases, and under the action of the pressure difference between the inside and outside of the low-pressure storage unit, the locking groove 96 moves a certain distance relative to the locking slider 97, and the buffer block 51 is further compressed to further compress the sealing element 4.

[0354] In some embodiments of the present application, a pressure detection device is provided in the low-pressure storage device to monitor the pressure state in the storage chamber 20 in real time.

[0355] When the air extraction device is working, the pressure detection device monitors the pressure in the storage chamber 20. When the pressure in the storage chamber 20 drops to a first pressure value, the air extraction device stops working.

[0356] As the low-pressure storage device is placed for a longer time, external gas slowly enters the storage chamber 20, and the pressure value in the storage chamber 20 increases. When the pressure in the storage chamber 20 increases from the first pressure value to the second pressure value, the vacuum device is started, so that the pressure in the storage chamber 20 is reduced again, so that the air pressure in the low-pressure storage device is maintained in a negative pressure state.

[0357] In some embodiments of the present application, the second pressure value is lower than the standard atmospheric pressure, and the second pressure value is higher than the first pressure value; the above setting enables the low-pressure storage unit to always keep its internal pressure lower than the standard atmospheric pressure while keeping the door body 3 closed, so as to extend the food preservation.

[0358] In some embodiments of the present application, Figure 40-41 As shown, the refrigerator includes two doors 11 arranged opposite to each other, and the two doors 11 arranged opposite to each other cooperate to open or close the access opening 13. A flip beam 5 is provided on one end of one door 11 close to the other door 11. A guide rail is provided on the top wall of the storage chamber 12 of the refrigerator, and the flip beam 5 can slide with the guide rail to achieve the switching of the flip beam 5 relative to different angles of the door 11. When the two doors 11 are closed, the flip beam 5 closes the gap between the two doors 11 and the box body 10 to effectively prevent the cold air from overflowing.

[0359] In some embodiments of the present application, the rotation axis of the flip beam 5 is recorded as the flip axis M; the flip beam 5 includes a free end 50 placed around the flip axis M. When the box door 11 is closed, the flip beam 5 is located on the side of the door body 3 of the low-pressure storage device away from the rear wall of the shell, so that during the closing process of the box door 11, the flip beam 5 can act on the door body 3 and push the door body 3 to move along the second moving direction.

[0360] In some embodiments of the present application, the free end 50 of the flip beam 5 is parallel to the free end 50 of the flip axis M.

[0361] In some embodiments of the present application, when the box door 11 is closed, on the projection of the plane where the access opening 13 is located, the projection of the flip beam 5 and the projection of the door body 3 of the low-pressure storage device cross-overlap.

[0362] In some embodiments of the present application, when the box door 11 is closed, on the projection of the plane where the loading and unloading port 13 is located, the direction perpendicular to the flip axis M of the flip beam 5 is recorded as the first direction; the midpoint of the projection of the door body 3 along the first direction is recorded as O; the reference line passing through the midpoint O and perpendicular to the first direction is recorded as the first reference line L.

[0363] During the closing process of the box door 11, the flip beam 5 acts on the door body 3, and the door body 3 moves along the second moving direction through the guide rail device under the action of the flip beam 5, so that the locking structure is locked and the door body 3 is in the pre-locking position. That is, during the closing process of the box door 11, the action of the flip beam 5 on the door body 3 can ensure that the low-pressure storage unit is in a pre-locking sealing state and meets the vacuum sealing conditions; on the other hand, it avoids the door body 3 not closing to the pre-locking position due to the user's insufficient force when closing the door body 3, resulting in poor sealing, and ultimately causing the exhaust device to work ineffectively, thereby reducing noise and power consumption.

[0364] In some embodiments of the present application, during the closing process of the box door 11, on the projection of the plane where the access opening 13 is located, the projection of the flip beam 5 overlaps with the first reference line L of the door body 3 of the low-pressure storage device. With the above arrangement, when the box door 11 is closed, the flip beam 5 acts on the middle area of ​​the door body 3 along the first direction to make the force on the door body 3 more balanced. Under the force of the flip beam 5 on the door body 3 when flipping, the door body 3 moves along the second moving direction through the guide rail device.

[0365] It should be noted that in the present invention, the plane where the access opening 13 is located is the plane where the front end surface of the box body 10 surrounding the access opening 13 and used to cooperate with the box door 11 when the box door 11 is closed is located, that is, the access opening 13 and the front end surface of the box body 10 surrounding the access opening 13 and used to cooperate with the box door 11 when the box door 11 is closed are coplanar. When the box door 11 is closed, the box door 11 cooperates with the front surface of the box body 10 to close the access opening 13.

[0366] In some embodiments of the present application, when the door body 3 of the low-pressure storage device has not reached the pre-locking position, the box door 11 with the flip beam 5 is in the closing process, and the flip beam 5 interacts with the door body 3 of the low-pressure storage device when flipping around its flip axis M, so as to apply a force toward the shell 2 to the door body 3, so that the door body 3 moves toward the side close to the shell 2, so that the door body 3 is locked with the shell 2 and is in the pre-locking position, which can ensure that the low-pressure storage unit is in a pre-locked sealing state and meet the vacuum sealing conditions.

[0367] In some embodiments of the present application, in the direction perpendicular to the plane where the access port 13 is located, during the flipping process of the flip beam 5, the maximum displacement of the free end 50 entering the storage room is recorded as W; when the door body 3 and the shell 2 are in the pre-locking position, the distance between the front end of the door body 3 and the plane where the access port 13 is located is recorded as D; D≤W. During the closing process of the box door 11 provided with the flip beam 5, the flip beam 5 flips and pushes the door body 3 to move, and the door body 3 drives the storage container 14 to move along the closing direction, and the storage container 14 is pushed into the storage chamber 20; when the door body 3 is pushed by the flip beam 5 to close the storage port 21 and the sealing element 4 is squeezed by the door body 3 and the shell 2, the locking structure locks the door body 3 and the shell 2. As mentioned above, in the process of the door body 3 being pushed by the flip beam 5 from the open state to the pre-locking position of the door body 3, the flip beam 5 pushes the door body 3 to move along the second direction to the pre-locking position throughout the process.

[0368] In some embodiments of the present application, the guide rail device only has a first-level lock, and the door body 3 is locked in the pre-locking position through the first-level lock. During the closing process of the above door 11, the flip beam 5 can smoothly complete the flipping under the force of closing the door. That is, during the closing process of the door 11, W<D+(L0-L1). When the door 11 is closed, after the free end 50 of the flip beam 5 enters the storage room, the compression distance of the sealing element 4 through the door body 3 is less than the deformable amount of the sealing element 4, thereby ensuring that the flip beam 5 can be flipped into place during the closing process of the door 11, avoiding the rigid interference between the door body 3 and the flip beam 5, which causes the flip beam 5 to fail to flip into place.

[0369] In some embodiments of the present application, the guide rail device has a two-stage locking structure, and its second-stage locking is achieved when it is in a vacuum-sealed state. Under the setting of the guide rail device, during the closing process of the above door 11, the flip beam 5 can smoothly complete the flipping under the force of closing the door. That is, during the closing process of the door 11, W<D+(L2-L1). When the door 11 is closed, the compression of the sealing element 4 by the door body 3 after the free end 50 of the flip beam 5 enters the storage room is not enough to complete the second-stage locking, thereby ensuring that the low-pressure storage unit has a pre-locked sealing state and a vacuum-sealed state, while ensuring that the flip beam 5 can be flipped into place; and avoiding the rigid interference between the door body 3 and the flip beam 5, which causes the flip beam 5 to fail to flip into place, and also avoiding the flip beam 5 acting on the door body 3 too far, causing the door body 3 and the shell 2 to be directly and completely locked.

[0370] In some embodiments of the present application, the locking structure is adapted as follows: when the door body 3 moves to the first position, the self-locking function of the locking structure is triggered, and the locking structure drives the door body 3 to continue to automatically move a certain displacement in the closing direction through its own self-locking force to reach the pre-locking position to lock the door body 3 and the shell 2, and cause the sealing element 4 to be squeezed by the door body 3 and the shell 2.

[0371] The above self-locking force refers to the force provided by the elastic potential energy released by the elastic member 70 of the above self-locking locking structure and the double self-locking locking structure after the self-locking function is triggered for the first time, which prompts the door body 3 to continue to move in the second direction. That is, when the door body 3 moves under the action of external force and triggers the self-locking function, the door body 3 is in the first position.

[0372] Under the above settings, when the door body 3 is in the first position, the distance between the front end of the door body 3 and the plane where the access port 13 is located is recorded as D1; ​​wherein, D1<D. Similarly, in the direction perpendicular to the plane where the access port 13 is located, during the flipping process of the flip beam 5, the maximum displacement of the free end 50 of the flip beam 5 entering the storage room is recorded as W; wherein, D1=W. During the process from the door body 3 being opened to the door body 3 reaching the first position, the flip beam 5 pushes the door body 3 to move along the second direction throughout the process; when the door body 3 reaches the first position, the displacement of the free end 50 of the flip beam 5 entering the storage room reaches the maximum, the flip beam 5 continues to flip, and the displacement of the free end 50 of the flip beam 5 entering the storage room decreases, at which time the self-locking function of the door body 3 is triggered, the door body 3 automatically closes, and the door body 3 continues to automatically move to the pre-locking position along the second moving direction under the self-locking force of the locking structure to lock the door body 3 and the housing 2 in the pre-locking position.

[0373] In some embodiments of the present application, D1≤W, D1≤W≤D. That is, in this embodiment, after the door body 3 reaches the first position and before it reaches the pre-locking position, the displacement of the free end 50 of the flip beam 5 into the storage room reaches the maximum, the flip beam 5 continues to flip, and the displacement of the free end 50 of the flip beam 5 into the storage room decreases. The door body 3 continues to move along the second moving direction under the self-locking force of the locking structure and reaches the pre-locking position. As described above, during the process of the door body 3 reaching the first position from the open state, the flip beam 5 acts on the door body 3 throughout the entire process; and during the movement of the door body 3 from the first position to the pre-locking position (W-D1), the flip beam 5 continues to act on the door body 3 to promote the door body 3 to complete self-locking under the action of the locking structure.

[0374] That is, during the closing process of the box door 11 provided with the flip beam 5, when the flip beam 5 flips and pushes the door body 3 to move to the first position, the self-locking function of the locking structure is triggered, and the locking structure brings the door body 3 to automatically continue to move a certain distance in the closing direction to lock the door body 3 and the shell 2, and the sealing element 4 is squeezed by the door body 3 and the shell 2.

[0375] The present invention limits the relative position of the flip beam 5 and the door body 3 of the low-pressure storage device during the flipping process of the flip beam 5, and can lock the door body 3 and the shell 2 of the low-pressure storage device that have not reached the pre-locking position in the pre-locking position through the flipping action of the flip beam 5 during the flipping process of the flip beam 5, thereby effectively preventing the user from failing to reach the pre-locking state due to insufficient pushing force during use, resulting in the failure of the pre-locking sealing state, causing the vacuum device (vacuum pump 32) to ineffectively exhaust air, thereby effectively reducing noise and power consumption.

[0376] In some embodiments of the present application, the low-pressure storage device includes a pressure detection device, which is used to detect the pressure in the storage chamber 20 to adjust the working state of the air extraction device. When the locking structure locks the door body 3 and the housing 2 and starts the air extraction device, the air extraction device works at a first air extraction rate; the air extraction speed of the first air extraction rate is greater than the speed at which the external environment gas enters the storage chamber 20, and a pressure difference is formed on the opposite sides of the door body 3, so as to push the door body 3 to drive the storage container 14 to move a certain displacement in the closing direction, and the sealing element 4 is further compressed.

[0377] When the air pressure in the storage chamber 20 is reduced to the air extraction conversion pressure, the air extraction device is reduced from the first air extraction efficiency to the second air extraction efficiency;

[0378] When the air pressure in the storage chamber 20 decreases from the air extraction conversion pressure to the first pressure value, the air extraction device stops working.

[0379] Among them, the first pressure value is less than the air extraction conversion pressure and less than the external ambient atmospheric pressure.

[0380] As described above, when the door body 3 is closed to the pre-locking position, the vacuum device starts to work at a relatively large first vacuum rate to quickly increase the compression of the door body 3 and the shell 2 on the sealing element 4, so that the sealing of the low-pressure storage device is increased relative to the pre-locking sealing state; and then the vacuum efficiency is reduced to match the working mode of the refrigerator, avoid resonance, and reduce the noise generated by the vacuum device when it is working, so that the vacuum noise is controlled within a range acceptable to the user. As described above, during the operation of the vacuum device, considering the sealing of the door body 3 and the shell 2, vacuum is carried out in two stages with different vacuum efficiencies, so as to fully utilize the air pressure difference formed by the operation of the vacuum device to increase the sealing, and meet the requirements of low-noise operation when the vacuum device is working.

[0381] In some embodiments of the present application, the air extraction conversion pressure=the second pressure value.

[0382] In some embodiments of the present application, the low-pressure storage device includes a second position detection device, which is used to detect whether the door body 3 moves to the vacuum change position or the vacuum sealing position to adjust the working state of the vacuum device.

[0383] When the locking structure locks the door body 3 and the housing 2 and starts the air extraction device, the air extraction device works at a first air extraction rate; the air extraction speed of the first air extraction rate is greater than the speed at which the external ambient gas enters the storage chamber 20, and an air pressure difference is formed on opposite sides of the door body 3, so as to push the door body 3 to drive the storage container 14 to move a certain displacement in the closing direction, and the sealing element 4 is further compressed;

[0384] When the door body 3 moves to the air extraction change position, the air extraction efficiency of the air extraction device is reduced to the second air extraction efficiency;

[0385] When the door body 3 moves to the vacuum sealing position, the vacuum device stops working.

[0386] As described above, during the operation of the air extraction device, under the action of the pressure difference on the two sides of the door body 3, the door body 3 first moves from the pre-locking position to the air extraction change position along the second moving direction, and then moves from the air extraction change position to the vacuum sealing position along the second moving direction. That is, compared with the door body 3 being in the pre-locking position, the door body 3 is closer to the housing 2 when it is in the air extraction change position. Compared with the door body 3 being in the air extraction change position, the door body 3 is closer to the housing 2 when it is in the vacuum sealing position.

[0387] Among them, the length of the sealing element 4 compressed when the door body 3 moves to the air extraction change position is recorded as the air extraction sealing length L4; the pre-locking compression length L1<air extraction sealing length L4≤vacuum compression length L2. That is, the sealing performance of the low-pressure storage device when the door body 3 is in the air extraction change position is not higher than the sealing performance of the low-pressure storage device when the door body 3 is in the vacuum sealing position, and the sealing performance of the low-pressure storage device when the door body 3 is in the air extraction change position is higher than the sealing performance of the low-pressure storage device when the door body 3 is in the pre-locking position.

[0388] In some embodiments of the present application, the second position detection device is configured as a reflective displacement detection device. The second position detection device is disposed on the rear wall of the shell; the second position detection device includes a transmitter and a receiver. The transmitter emits a light beam to the wall surface of the storage container 14 close to the rear wall of the shell, and the wall surface of the storage container 14 close to the rear wall of the shell is on the optical path of the light beam emitted by the transmitter, and the light beam emitted by the transmitter is reflected, and the reflected light beam is received by the receiver and converted into an electrical signal output; according to the intensity difference and time difference of the reflected light, it can be determined whether the door body 3 has moved to the air extraction change position or the vacuum sealing position.

[0389] In some embodiments of the present application, the low-pressure storage device includes a pressure detection device and a second position detection device; the pressure detection device is used to detect the pressure in the storage chamber 20, and the second position detection device is used to detect whether the door body 3 moves to the air extraction change position to adjust the working state of the air extraction device.

[0390] When the locking structure locks the door body 3 and the housing 2 and starts the air extraction device, the air extraction device works at a first air extraction rate; the air extraction speed of the first air extraction rate is greater than the speed at which the external ambient gas enters the storage chamber 20, and an air pressure difference is formed on opposite sides of the door body 3, so as to push the door body 3 to drive the storage container 14 to move a certain displacement in the closing direction, and the sealing element 4 is further compressed;

[0391] When the door body 3 moves to the air extraction change position, the air extraction device reduces the first air extraction efficiency to the second air extraction efficiency;

[0392] When the air pressure in the storage chamber 20 drops to a first pressure value, the air extraction device stops working.

[0393] As described above, during the operation of the air extraction device, under the action of the pressure difference on the two opposite sides of the door body 3, the door body 3 first moves from the pre-locking position to the air extraction change position along the second moving direction; as the air extraction device continues to work, the air pressure in the storage chamber 20 decreases, and the door body 3 continues to move from the air extraction change position along the second moving direction. That is, compared with the door body 3 being in the pre-locking position, the door body 3 is closer to the housing 2 when it is in the air extraction change position. Compared with the door body 3 being in the air extraction change position, the air pressure in the low-pressure storage device decreases to the first pressure value and is closer to the housing 2. That is, the sealing performance of the low-pressure storage device when the door body 3 is in the air extraction change position is not higher than the sealing performance of the low-pressure storage device when the door body 3 is in the vacuum sealing position, and the sealing performance of the low-pressure storage device when the door body 3 is in the air extraction change position is higher than the sealing performance of the low-pressure storage device when the door body 3 is in the pre-locking position.

[0394] In some embodiments of the present application, the second position detection device includes a second proximity detection device fixed on the housing 2, and a second proximity sensor fixed on the door 3 or the storage container 14;

[0395] When the door body 3 moves to the air extraction change position, the second proximity sensing body corresponds to the position of the second proximity detection device and acts on the second proximity detection device to transmit a signal that the door body 3 is closed to the air extraction change position;

[0396] When the door body 3 is opened, the second proximity sensing body is away from the second proximity detection device and cannot have any effect on the second proximity detection device, and the second proximity detection device has no signal transmission.

[0397] In some embodiments of the present application, the low-pressure storage device includes a second position detection device and a third position detection device; the second position detection device is used to detect whether the door body 3 moves to the vacuum change position, and the third position detection device is used to detect whether the door body 3 moves to the vacuum sealing position to adjust the working state of the vacuum device.

[0398] In some embodiments of the present application, the second position detection device is configured as a proximity position detection device. Specifically, the second position detection device includes a second proximity detection device fixed on the housing 2, and a second proximity sensor fixed on the door body 3 or the storage container 14;

[0399] When the door body 3 moves to the air extraction change position, the second proximity sensing body corresponds to the position of the second proximity detection device and acts on the second proximity detection device to transmit a signal that the door body 3 is closed to the air extraction change position;

[0400] When the door body 3 is opened, the second proximity sensing body is away from the second proximity detection device and cannot have any effect on the second proximity detection device, and the second proximity detection device has no signal transmission.

[0401] In some embodiments of the present application, the third position detection device is configured as a proximity position detection device. The third position detection device includes a third proximity detection device fixed on the housing 2, and a third proximity sensor fixed on the door 3 or the storage container 14;

[0402] When the door body 3 moves to the vacuum sealing position, the third proximity sensing body corresponds to the position of the third proximity detection device and acts on the third proximity detection device to transmit a signal indicating that the door body 3 is closed to the vacuum sealing position;

[0403] When the door body 3 is opened, the third proximity sensing body is away from the third proximity detection device and cannot have any effect on the third proximity detection device, and the third proximity detection device has no signal transmission.

[0404] The maximum sensing distance of the second position detection device is set as G1, the maximum sensing distance of the third position detection device is set as G2, and the distance between the air extraction change position and the vacuum sealing position is G0; wherein, G1<G0, G1<G0. That is, the position detection accuracy of the second position detection device and the third position detection device is high, and any detection device will not detect the position detected by the other detection device, so as to ensure the uniqueness of signal transmission.

[0405] In the above, the length of the sealing element 4 compressed when the door body 3 moves to the air extraction change position is recorded as the air extraction sealing length L4; the pre-locking compression length L1<air extraction sealing length L4≤vacuum compression length L2. That is, the sealing performance of the low-pressure storage device when the door body 3 is in the air extraction change position is not higher than the sealing performance of the low-pressure storage device when the door body 3 is in the vacuum sealing position, and the sealing performance of the low-pressure storage device when the door body 3 is in the air extraction change position is higher than the sealing performance of the low-pressure storage device when the door body 3 is in the pre-locking position.

[0406] In some embodiments of the present application, the proximity-type second position detection device or the third position detection device can be configured as any one of a photoelectric proximity switch, an eddy current proximity switch, a capacitive proximity switch, and a Hall proximity switch.

[0407] In some embodiments of the present application, the third position detection device is configured as a reflective displacement detection device, and its specific structure is the same as the third position detection device configured as a reflective displacement detection device, which will not be described in detail here.

[0408] In some embodiments of the present application, the time required for the door body 3 and the shell 2 to compress the sealing element 4 to the air-evacuation sealing length L4, or the air pressure in the low-pressure storage device corresponding to the air pressure change rate, the current of the vacuum pump 32, the exhaust flow rate of the vacuum pump 32, etc. when the door body 3 and the shell 2 compress the sealing element 4 to the air-evacuation sealing length L4, at least one of them serves as a judgment condition for the vacuum pump 32 to end the first air-evacuation rate operation and start the second air-evacuation efficiency operation.

[0409] When the air pressure in the low-pressure storage device corresponding to the compression of the sealing element 4 to the vacuum sealing length L4 by the action of the above door body 3 and shell 2 is reduced to a set value, it represents that the difference between the external environmental air pressure and the air pressure in the low-pressure storage device reaches the point where the sealing formed by the door body 3 and shell 2 squeezing the sealing element 4 reaches a vacuum sealing condition.

[0410] The door body 3 and the shell 2 squeeze the sealing element 4. As the air extraction time increases, the air pressure in the low-pressure storage device decreases, the air extraction resistance of the vacuum pump 32 increases, and the current of the vacuum pump 32 increases accordingly.

[0411] In some embodiments of the present application, the first pumping efficiency is set to a first speed V1, and the second pumping efficiency is set to a second speed V2. The second speed V2 is less than the first speed V1. The rated speed of the vacuum pump 32 can be set as V0. V1 is any value between 0.8V0 and V0, and V2 is any value between 0.5V0 and 0.8V0.

[0412] In some embodiments of the present application, the first pumping efficiency is set to a first power P1, and the second pumping efficiency is set to a second power P2. The second power P2 is less than the first power P1. The rated power of the vacuum pump 32 can be set as P0. P1 is any value from 0.8P0 to P0, and P2 is any value from 0.5P0 to 0.8P0.

[0413] As described above, in the embodiment of the present application, when evacuating, the vacuum pump 32 first operates at a first pumping rate to quickly pump air, so as to ensure that the amount of air pumped by the vacuum pump 32 is greater than the amount of air entering the storage chamber 20 from the outside environment, and quickly forms a vacuum sealing condition. When the vacuum sealing condition is achieved, the vacuum pump 32 then operates at a second pumping efficiency that is lower than the first pumping rate, reduces the pumping rate, reduces the noise of the vacuuming operation, and controls the vacuuming noise within an acceptable low noise range.

[0414] In some embodiments of the present application, Figure 2 As shown, a cover plate is provided on the top of the low-pressure storage device housing 2, and the cover plate is connected to the housing 2; and one or more operation buttons are provided on the cover plate.

[0415] As another configurable method, the operation button is used to turn on or off the vacuuming, so that the user can manually control the vacuuming.

[0416] As another configurable manner, the operation button is used to control the opening or closing state of the electronic ventilation unit 31 to manually control the connection and disconnection between the storage chamber 20 and the outside.

[0417] In some embodiments of the present application, Fig.12 As shown, the storage chamber 20 is provided with an atmosphere-controlled membrane assembly and a ventilation unit.

[0418] In some embodiments of the present application, the ventilation unit is an electronic ventilation unit 31, and the controller controls the opening or closing state of the electronic ventilation unit 31 to connect or disconnect the storage chamber 20 with the external environment. The electronic ventilation unit 31 can be automatically opened or closed according to a preset control program to control the storage chamber 20 to be connected or disconnected with the external environment according to the preset control program.

[0419] In some embodiments of the present application, the atmosphere control membrane assembly has a nitrogen-oxygen separation membrane 36, and oxygen-affinity groups are present on the nitrogen-oxygen separation membrane 36. Oxygen is more likely to adhere to oxygen-affinity groups than nitrogen, carbon dioxide, etc.; that is, a large amount of oxygen is attached to the nitrogen-oxygen separation membrane 36.

[0420] In some embodiments of the present application, when the door body 3 is closed (it can be set that the door body 3 is closed to the pre-locking position), the ventilation unit is opened, and the storage chamber 20 is connected to the external environment. A large number of oxygen molecules in the storage chamber 20 are adsorbed on the nitrogen-oxygen separation membrane 36. That is, relative to the oxygen content in the air, the oxygen concentration on the gas-controlled membrane assembly is greater. At this time, the vacuum pump 32 works to evacuate air, and a pressure difference is formed on the opposite sides of the nitrogen-oxygen separation membrane 36. The oxygen molecules attached to the nitrogen-oxygen separation membrane 36 are concentratedly extracted, and the gas extracted by the vacuum pump 32 at this time has a higher oxygen content than when the gas-controlled membrane assembly is evacuated. When the vacuum pump 32 works for a preset evacuation time, a low oxygen environment is formed in the storage chamber 20. At this time, the ventilation unit is closed, the storage chamber 20 is disconnected from the external environment, the vacuum pump 32 continues to work, and the air pressure in the low-pressure storage unit is reduced, and finally a low-oxygen and low-pressure storage environment is formed to effectively extend the preservation time.

[0421] In the above, when the ventilation unit is turned on and the vacuum pump 32 is working, the oxygen content in the gas extracted by the vacuum pump 32 is recorded as the oxygen-rich concentration C1. The oxygen content in the ambient air is the normal oxygen concentration C0. Among them, C1>C0. That is, the oxygen concentration C0 in the gas entering the storage chamber 20 from the external environment is lower than the oxygen content in the gas extracted from the storage chamber 20 by the vacuum pump 32.

[0422] In the above process, a large amount of oxygen in the air entering the storage chamber 20 from the outside is attached to the nitrogen-oxygen separation membrane 36, and the oxygen content in the storage chamber 20 is lower than the oxygen content on the nitrogen-oxygen separation membrane 36. As the vacuum pump 32 continues to work to evacuate the storage chamber 20, the oxygen concentration in the storage chamber 20 decreases to the second oxygen concentration C2. As the evacuation time increases, the oxygen concentration reaches a relative equilibrium state, and the oxygen content cannot decrease if the evacuation continues; a hypoxic environment is formed at this time. Among them, the normal oxygen concentration C0> the second oxygen concentration C2.

[0423] In some embodiments of the present application, when the locking structure locks the door body 3 and the housing 2 and the ventilation unit is opened, the storage chamber 20 is connected to the external environment, the exhaust device works, and a pressure difference is generated on the opposite sides of the nitrogen-oxygen separation membrane 36, and the oxygen molecules attached to the nitrogen-oxygen separation membrane 36 are extracted, and the oxygen concentration in the storage chamber 20 is reduced;

[0424] When the locking structure locks the door body 3 and the shell 2 and the ventilation unit is closed, the storage chamber 20 is isolated from the external environment, the vacuum device works, and the air pressure in the storage chamber 20 decreases. Under the action of the pressure difference between the side of the door body 3 close to the external environment and the side of the door body 3 close to the storage chamber 20, the door body 3 drives the storage container 14 to produce a certain displacement in the closing direction through the guide rail device, and the sealing element 4 is further compressed.

[0425] In some embodiments of the present application, when the ventilation unit is turned on and the exhaust device is working to reduce the oxygen concentration in the storage chamber 20 to the second oxygen concentration C2, the ventilation unit is turned off (the low-pressure storage device is in a sealed state), and the exhaust device continues to work to evacuate the storage chamber 20. As the vacuum pump 32 evacuates, the oxygen concentration and pressure in the low-pressure storage device are reduced. When the pressure in the low-pressure storage device is reduced to the first pressure value (0.7 atmospheres), the oxygen concentration in the storage chamber 20 can be reduced to the third oxygen concentration C3, and a low-oxygen and low-pressure environment is formed at this time, which can achieve a better preservation effect. Among them, C3<C2<C0.

[0426] It should be noted that, as a configurable method, the oxygen concentration mentioned above is the molecular weight of oxygen in a unit space.

[0427] In some embodiments of the present application, the exhaust device includes a vacuum pump 32 and an exhaust pipeline connecting the vacuum pump 32 and the storage chamber 20; the exhaust pipeline includes a connection end connected to the vacuum pump 32 and an exhaust end connected to the storage chamber 20; the exhaust pipeline passes through the shell 2, and the exhaust end port of the exhaust pipeline is located between the nitrogen and oxygen separation membrane 36 and the inner wall of the shell, which is used to form a pressure difference on the opposite sides of the nitrogen and oxygen separation membrane 36 when the vacuum pump 32 is working. With the above arrangement, when the vacuum pump 32 is working, a pressure difference is quickly formed on the opposite sides of the nitrogen and oxygen separation membrane 36, and oxygen is quickly and concentratedly extracted from the storage chamber 20, increasing the concentration difference between the extracted oxygen concentration and the oxygen concentration entering the storage chamber 20 from the external environment, and effectively improving the oxygen reduction efficiency.

[0428] In some embodiments of the present application, Fig.42 The housing 2 is provided with an installation opening 28, and a nitrogen-oxygen separation membrane 36 is provided on the housing 2, and the nitrogen-oxygen separation membrane 36 covers the installation opening 28; and a transfer plate 7 for closing the installation opening 28 is provided on the side of the nitrogen-oxygen separation membrane 36 close to the external environment. The exhaust pipeline passes through the transfer plate 7, and the port of the exhaust end is located between the nitrogen-oxygen separation membrane 36 and the transfer plate 7, so that when the vacuum pump 32 is working, a pressure difference is formed on the opposite sides of the nitrogen-oxygen separation membrane 36, so as to extract the oxygen attached to the nitrogen-oxygen separation membrane 36 in a targeted manner.

[0429] When the above-mentioned gas-controlled membrane assembly is set and the vacuum pump 32 is working, the ventilation unit is first opened for a period of time (preset vacuuming time) to reduce oxygen at normal pressure. After the vacuum pump 32 works for a period of time, a low-oxygen environment is formed in the low-pressure storage device. Then the ventilation unit is closed and the vacuum pump 32 is kept working to evacuate the low-pressure storage device to form a low-oxygen and low-pressure storage environment, so that the oxygen concentration in the storage chamber 20 is lower than the oxygen concentration in the low-pressure storage environment formed by simple vacuuming and decompression, which more effectively inhibits the aerobic respiration of the food and effectively prolongs the preservation time.

[0430] Under the setting of the low oxygen and low pressure storage environment formed above, when the pressure value in the storage chamber 20 increases to the second pressure value due to slow gas leakage, the gas extraction device is started to reduce the pressure in the storage chamber 20 again. At this time, since the slow gas leakage has little effect on the oxygen content in the storage chamber 20, only a single vacuuming and pressure reduction operation is performed, and no oxygen reduction operation is performed.

[0431] When the door 3 of the low-pressure storage device is opened and then closed, the vacuum pump 32 performs the operation mentioned in the above embodiment of first opening the ventilation unit to reduce oxygen at normal pressure, and then closing the ventilation unit to vacuum and reduce the pressure, so as to form a low-oxygen and low-pressure storage environment.

[0432] In some embodiments of the present application, the low-pressure storage device includes an oxygen concentration detection device, which is used to detect the oxygen concentration in the storage chamber 20 to adjust the working state of the ventilation unit.

[0433] The controller is configured to, when receiving the first signal, open the ventilation unit and start the exhaust device; generate a pressure difference on the opposite sides of the nitrogen-oxygen separation membrane 36, and the oxygen molecules attached to the nitrogen-oxygen separation membrane 36 are extracted, and the oxygen concentration in the storage chamber 20 is reduced to form a low-oxygen storage environment. The control mode of the above controller receiving the first signal is recorded as the normal pressure low-oxygen mode.

[0434] When the second signal is received, the ventilation unit is closed and the air extraction device is started; the air pressure in the storage chamber 20 decreases, and under the effect of the pressure difference between the side of the door body 3 close to the external environment and the side of the door body 3 close to the storage chamber 20, the door body 3 drives the storage container 14 to move in the closing direction through the guide rail device, and the sealing element 4 is further compressed to form a low-pressure storage environment. The control mode of the above controller receiving the second signal is recorded as the low-pressure mode.

[0435] When the third signal is received, the ventilation unit is first closed and the exhaust device is started, and the oxygen concentration in the storage chamber 20 is reduced; and when the exhaust device works for a preset exhaust time, the ventilation unit is closed and the exhaust device is kept working, and the air pressure in the storage chamber 20 is reduced to form a low oxygen and low pressure environment. A low pressure storage environment is formed. The control mode of the above controller receiving the third signal is recorded as a low oxygen and low pressure mode.

[0436] The above different storage modes (low oxygen mode, low pressure mode, low pressure low oxygen mode) are suitable for the preservation requirements of different foods, so as to provide a targeted preservation environment, improve the preservation effect, and extend the preservation time.

[0437] In some embodiments of the present application, three types of ingredients are provided.

[0438] The first category includes ingredients with large transpiration and high humidity. For example, for fruits and vegetables, especially those with large transpiration areas (leafy vegetables, such as spinach; their specific surface area is large) and those with relatively high humidity (fruits, such as cherries, mulberries, etc.), under low-pressure conditions, due to the large evaporation area, fruits and vegetables are prone to transpiration and water loss, and cannot achieve the ideal preservation effect. In order to reduce transpiration water loss, it is suitable for normal pressure and low oxygen mode to reduce its respiration, effectively preserve nutrients, and avoid transpiration water loss caused by low-pressure environment, effectively improving freshness.

[0439] The second category is low-humidity food. For example, for root vegetables (such as potatoes, sweet potatoes, etc.), their specific surface area is smaller than that of fruits and vegetables, and their transpiration water loss is within the normal range, so they can be stored in low-pressure mode.

[0440] The third category includes dry ingredients. For example, for dry ingredients (such as dried fruits, tea leaves, and grains), there is no problem of water volatilization. The oxygen concentration can usually only be reduced to the second oxygen concentration C2 for preservation under normal pressure, and it cannot be further reduced. It is still easy to be oxidized and deteriorate. Dry ingredients are suitable for low oxygen and low pressure mode. They are stored in a low oxygen and low pressure environment. In an environment of the third oxygen concentration C3, which is lower than the second oxygen concentration C2, their respiration is further reduced, and they are not easily oxidized and deteriorated, which helps to preserve nutrients.

[0441] Among the above three types of food, the humidity of the first type is greater than that of the second type and greater than that of the third type. Among them, the first type is suitable for normal pressure and low oxygen environment, the second type is suitable for low pressure environment, and the third type is suitable for low pressure and low oxygen environment.

[0442] In some embodiments of the present application, the refrigerator is provided with a food identification device, which is used to identify food placed in the low-pressure storage device, determine the type of the identified food, and send one of the first signal, second signal and third signal corresponding to the type to the controller.

[0443] The food identification device includes an RFID tag, an RFID antenna, an RFID reader and a processor;

[0444] The RFID tag is used to record food information and is attached to the food; the RFID antenna and RFID reader are set on the refrigerator; the processor is used to confirm the type of food according to the food information.

[0445] The RFID reader reads and parses the food information sent by the RFID tag through the RFID antenna, and sends the food information to the processor; the processor determines the type of food according to the food information, and sends a first signal, a second signal, or a third signal corresponding to the type to the controller.

[0446] In some embodiments of the present application, the RFID antenna and RFID reader of the food identification device are provided as an identification module on the door 11. When the user places food into the low-pressure storage device, the RFID tag attached to the food is first scanned by the identification module and then placed in the low-pressure storage device.

[0447] In some embodiments of the present application, the food information stored in the label includes information such as the name of the food, the quantity (such as weight, quantity), etc.

[0448] In some embodiments of the present application, the processor determines the category of the ingredient (first category, second category, third category) based on the correspondence between the ingredient name and the category to which it belongs, and sends a first signal, a second signal, or a third signal to the controller based on the category of the ingredient to determine the applicable storage mode, such as normal pressure and low oxygen mode, low pressure mode, or low oxygen and low pressure mode.

[0449] In some embodiments of the present application, the food is classified according to its humidity. The first humidity is suitable for normal pressure and low oxygen storage mode, the second humidity is suitable for low pressure environment, and the third humidity is suitable for low pressure and low oxygen environment; wherein the first humidity> the second humidity> the third humidity.

[0450] In some embodiments of the present application, when the food is determined to be the first category of food (first humidity), a first signal (first humidity) is sent to the controller; when the food is determined to be the second category of food, a second signal is sent to the controller; when the food is determined to be the third category of food (first humidity), a third signal is sent to the controller.

[0451] In some embodiments of the present application, the food information stored in the tag includes food name, category (such as first category, second category, third category), quantity (such as weight, volume), etc. The processor sends the first signal, the second signal, or the third signal to the controller according to the category.

[0452] In some embodiments of the present application, when at least two types of ingredients are put in, the processor compares the quantities corresponding to the different types of ingredients, and sends a signal corresponding to the type of the ingredient with the largest number to the controller. That is, when at least two types of ingredients are put in, the storage mode is selected by judging the quantities corresponding to each type of ingredient. For example: a first type and a second type of ingredients are stored in a low-pressure storage device at the same time. When the quantity (volume) of the first type of ingredients (leafy vegetables) is greater than the quantity (volume) of the second type of ingredients, the normal pressure and low oxygen mode is selected for preservation. When the quantity (volume) of the second type of ingredients (dry ingredients) is greater than the quantity (volume) of the first type of ingredients, the low-pressure preservation mode is selected.

[0453] In some embodiments of the present application, the processor determines the category of the ingredient (first category, second category, third category) based on the correspondence between the ingredient name and the category to which it belongs; when the determined categories of the ingredients are not less than two, the category to which the largest number of ingredients belongs is determined, and the first signal, second signal, or third signal corresponding to the category to which the largest number of ingredients belongs is sent to the controller.

[0454] In some embodiments of the present application, a plurality of operation buttons are provided on the cover plate on the top of the shell 2; when the operation button is triggered, one of the first signal, the second signal and the third signal is sent to the controller.

[0455] In some embodiments of the present application, there are at least three operation buttons, each of which controls the selection of a storage mode. That is, each operation button corresponds to a storage mode, and after the operation button is pressed, the controller is sent a first signal, a second signal, or a third signal corresponding to the storage mode.

[0456] In some embodiments of the present application, the operation interface includes an operation button, and the storage mode is selected by the number of times the operation button is triggered, and the conversion between multiple storage modes is realized. For example, the default is the normal pressure and low oxygen mode. Relative to the default storage mode, triggering the operation button once is the low pressure mode, triggering the operation button twice is the low oxygen and low pressure mode, and triggering the operation button three times returns to the default normal pressure and low oxygen mode. As above, the selection is cycled between the set multiple storage modes according to the number of triggers. That is, when setting an operation button, pressing it once sends a first signal to the controller, pressing it twice in succession sends a second signal to the controller, and pressing it three times in a row sends a third signal to the controller.

[0457] In some embodiments of the present application, an electronic smart screen is provided on the cover plate, and operation buttons are formed on the electronic smart screen for user operation.

[0458] In some embodiments of the present application, the low-pressure storage device includes a pressure detection device and an oxygen concentration detection device. The pressure detection device is used to detect the pressure in the storage chamber 20 to control the working state of the air extraction device or the ventilation unit. The oxygen concentration detection device is used to detect the oxygen concentration in the storage chamber 20 to adjust the working state of the ventilation unit.

[0459] The controller is configured to: upon receiving the fourth signal, open the ventilation unit and start the exhaust device; generate a pressure difference on opposite sides of the nitrogen-oxygen separation membrane 36, and the oxygen molecules attached to the nitrogen-oxygen separation membrane 36 are extracted, and the oxygen concentration in the storage chamber 20 is reduced;

[0460] When the exhaust device works for a preset exhaust time, the oxygen content in the storage chamber 20 is reduced to C2 to form a hypoxic storage environment. At this time, the ventilation unit is closed and the exhaust device is kept working. The air pressure in the storage chamber 20 is reduced. Under the effect of the pressure difference between the side of the door body 3 close to the external environment and the side of the door body 3 close to the storage chamber 20, the door body 3 drives the storage container 14 to move a certain distance in the closing direction through the guide rail device, and the sealing element 4 is further compressed.

[0461] When the air pressure in the storage chamber 20 drops to a first pressure value, the air extraction device stops working;

[0462] When the air pressure in the storage chamber 20 increases from the first pressure value to the second pressure value, and the oxygen concentration is not higher than the second oxygen concentration, the ventilation unit remains closed and the exhaust device works. In this process, when the pressure value in the storage chamber 20 reaches the second pressure value due to slow leakage, the oxygen content of the gas entering the storage chamber 20 by the leakage is C0, and the oxygen content in the storage chamber 20 increases, but is not higher than the second oxygen concentration C2. At this time, the oxygen content is not higher than the oxygen content after atmospheric pressure oxygen reduction, and atmospheric pressure oxygen reduction is no longer required. The vacuum pump 32 is directly started, and the vacuum pump 32 works to reduce the pressure in the storage chamber 20, so that the pressure in the storage chamber 20 is reduced to the first pressure value, and the oxygen content is reduced to the third oxygen concentration C3.

[0463] When the air pressure in the storage chamber 20 increases from the first pressure value to the second pressure value, and the oxygen concentration is higher than the second oxygen concentration, a fourth signal is sent to the controller. That is, the oxygen reduction and pressure reduction actions are repeated at normal pressure. In this process, when the pressure value in the storage chamber 20 reaches the second pressure value due to slow leakage, the oxygen content of the gas entering the storage chamber 20 by the leakage is C0, and the oxygen content in the storage chamber 20 increases and is higher than the second oxygen concentration C2. The oxygen content at this time is higher than the oxygen content after the oxygen reduction at normal pressure. The oxygen reduction at normal pressure is performed first, and then the pressure is reduced, so that the oxygen concentration in the storage chamber 20 is reduced to the third oxygen concentration C3 again.

[0464] The above operation forms an ultra-low oxygen and low pressure storage environment, and an ultra-low oxygen environment with a lower oxygen content than the normal pressure low oxygen environment is formed in the storage chamber 20, and the anaerobic respiration of anaerobic bacteria (such as lactic acid bacteria) is used for fermentation. For example, when the anaerobic bacteria are lactic acid bacteria, the incomplete oxidation product after oxidation is lactic acid, and lactic acid fermentation is performed. This mode is recorded as a vacuum fermentation mode. That is, when the vacuum fermentation mode is selected, a fourth signal is sent to the controller.

[0465] The above settings can set the vacuuming time to any value between 30 minutes and 60 minutes.

[0466] In some embodiments of the present application, the low-pressure storage device includes a pressure detection device and an oxygen concentration detection device. The pressure detection device is used to detect the pressure in the storage chamber 20 to control the working state of the air extraction device or the ventilation unit; the oxygen concentration detection device is used to detect the oxygen concentration in the storage chamber 20 to adjust the working state of the ventilation unit.

[0467] The controller is configured to: upon receiving the fourth signal, open the ventilation unit and start the exhaust device; generate a pressure difference on opposite sides of the nitrogen-oxygen separation membrane 36, and the oxygen molecules attached to the nitrogen-oxygen separation membrane 36 are extracted, and the oxygen concentration in the storage chamber 20 is reduced;

[0468] When the oxygen concentration in the storage chamber 20 is reduced to the second oxygen concentration, the oxygen content in the storage chamber 20 is reduced to C2 to form a low oxygen storage environment. At this time, the ventilation unit is closed and the exhaust device is kept working, the air pressure in the storage chamber 20 is reduced, and under the effect of the pressure difference between the side of the door body 3 close to the external environment and the side of the door body 3 close to the storage chamber 20, the door body 3 drives the storage container 14 to generate a certain displacement in the closing direction through the guide rail device, and the sealing element 4 is further compressed.

[0469] When the air pressure in the storage chamber 20 drops to a first pressure value, the air extraction device stops working.

[0470] When the air pressure in the storage chamber 20 increases from the first pressure value to the second pressure value, and the oxygen concentration is not higher than the second oxygen concentration, the ventilation unit remains closed and the exhaust device works. In this process, when the pressure value in the storage chamber 20 reaches the second pressure value due to slow leakage, the oxygen content of the gas entering the storage chamber 20 by the leakage is C0, and the oxygen content in the storage chamber 20 increases, but is not higher than the second oxygen concentration C2. At this time, the oxygen content is not higher than the oxygen content after atmospheric pressure oxygen reduction, and atmospheric pressure oxygen reduction is no longer required. The vacuum pump 32 is directly started, and the vacuum pump 32 works to reduce the pressure in the storage chamber 20, so that the pressure in the storage chamber 20 is reduced to the first pressure value, and the oxygen content is reduced to the third oxygen concentration C3.

[0471] When the air pressure in the storage chamber 20 increases from the first pressure value to the second pressure value, and the oxygen concentration is higher than the second oxygen concentration, a fourth signal is sent to the controller. That is, the oxygen reduction and pressure reduction actions are repeated at normal pressure. In this process, when the pressure value in the storage chamber 20 reaches the second pressure value due to slow leakage, the oxygen content of the gas entering the storage chamber 20 by the leakage is C0, and the oxygen content in the storage chamber 20 increases and is higher than the second oxygen concentration C2. The oxygen content at this time is higher than the oxygen content after the oxygen reduction at normal pressure. The oxygen reduction at normal pressure is performed first, and then the pressure is reduced, so that the oxygen concentration in the storage chamber 20 is reduced to the third oxygen concentration C3 again.

[0472] The above operations form an ultra-low oxygen and low-pressure storage environment. An ultra-low oxygen environment with a lower oxygen content than the normal pressure low oxygen environment is formed in the storage chamber 20, and fermentation is carried out by anaerobic respiration of anaerobic bacteria (such as lactic acid bacteria). For example, when the anaerobic bacteria are lactic acid bacteria, the incomplete oxidation product after oxidation is lactic acid, and lactic acid fermentation is carried out; when yeast undergoes anaerobic respiration fermentation, it belongs to alcohol fermentation, producing alcohol and CO2. Commonly used flour fermentation is alcohol fermentation using yeast, which produces CO2. This mode is recorded as vacuum fermentation mode. That is, when the vacuum fermentation mode is selected, a fourth signal is sent to the controller.

[0473] In some embodiments of the present application, an operation button is provided on the cover plate on the top of the housing 2; when the operation button is triggered, a fourth signal is sent to the controller, that is, the vacuum fermentation mode is selected after the operation button is pressed.

[0474] In some embodiments of the present application, the second pressure value is 0.9 atm. In the process of the pressure in the storage chamber 20 rising from the first pressure value to the second pressure value, the oxygen content of the gas entering the storage chamber 20 is C0.

[0475] In some embodiments of the present application, the vacuum pump of the air extraction device has an air outlet pipeline, and the air outlet pipeline is divided into a first air outlet branch and a second air outlet branch by a second valve. The first air outlet branch is connected to the outside of the storage room to discharge the gas extracted by the vacuum pump out of the storage room. The second air outlet branch is connected to other spaces in the storage room except the low-pressure storage device (such as shelves, ordinary normal pressure storage drawers), and is used to pass the gas in the low-pressure storage device into other spaces in the storage room except the low-pressure storage device.

[0476] In some embodiments of the present application, when the controller receives the fourth signal, the ventilation unit is closed and the exhaust device is working, the second valve connects the air outlet pipeline and the second air outlet branch, the air pressure in the low-pressure storage device is reduced, and the gas in the low-pressure storage device enters other areas in the storage room through the exhaust pipeline, vacuum pump, air outlet pipeline, second valve, and second air outlet pipeline. Alcohol fermentation (yeast) produces CO2, and a gas with a high CO2 concentration is formed in the low-pressure storage device. The gas with a high CO2 concentration is passed into other areas in the storage room, increasing the CO2 concentration in the area, inhibiting the respiration of the food, and improving the preservation effect.

[0477] In some embodiments of the present application, after the controller receives the fourth signal, the ventilation unit is opened and the exhaust device is working, the second valve connects the air outlet pipeline and the first air outlet branch, and disconnects the air outlet pipeline and the second air outlet branch, and the gas in the low-pressure storage device is discharged from the storage room through the exhaust pipeline, the vacuum pump, the air outlet pipeline, the second valve, and the first air outlet pipeline.

[0478] In some embodiments of the present application, the refrigerator has a vacuum air supply duct for cooling the low-pressure storage device. The vacuum air supply duct is connected to the refrigeration system of the refrigerator to guide the low-temperature airflow processed by the refrigeration system to the low-pressure storage device, thereby specifically cooling the low-pressure storage device.

[0479] In some embodiments of the present application, a vacuum air supply duct is arranged on the periphery of the shell 2 of the low-pressure storage device so that the low-temperature airflow processed by the refrigeration system surrounds the periphery of the low-pressure storage device, thereby cooling the interior of the low-pressure storage device.

[0480] In some embodiments of the present application, the housing 2 is configured as a double-layer structure. Specifically, the housing 2 has a first housing wall defining the storage chamber 20 and a second housing wall surrounding the first housing wall, and the first housing wall and the second housing wall together define a vacuum air supply duct.

[0481] In some embodiments of the present application, one end of the vacuum air supply duct is connected to the refrigeration system, and the other end of the vacuum air supply duct is connected to the storage room. The low-temperature air flow flows through the shell to cool the low-pressure storage device and then enters the storage room.

[0482] After placing the food to be fermented in the storage container 14, the drawer unit is closed. When the controller receives the fourth signal, the vacuum air supply duct is disconnected from the refrigeration system, and the low-pressure storage device is stopped from cooling down, so that the low-pressure storage device is kept at a relatively high temperature and low oxygen environment for fermentation, thereby improving the fermentation efficiency.

[0483] In some embodiments of the present application, one of the storage rooms of the refrigerator is set as a variable temperature room, and the low-pressure storage device is installed in the variable temperature room. The variable temperature room is connected to the refrigeration system of the refrigerator, and the refrigeration system is used to adjust the temperature of the variable temperature room, thereby adjusting the temperature of the low-pressure storage device located in the variable temperature room.

[0484] In some embodiments of the present application, the temperature in the variable temperature chamber is controlled at 5° to 15°.

[0485] After placing the food to be fermented in the storage container 14, the drawer unit is closed. When the controller receives the fourth signal, the temperature of the variable temperature chamber is increased to the first temperature, and the low-pressure storage device is maintained at a relatively high temperature and low oxygen environment for fermentation to improve the fermentation efficiency.

[0486] As a configurable manner, the first temperature may be set to any value between 12° and 15°.

[0487] In some embodiments of the present application, the low-pressure storage device is provided with a heating device. When the vacuum fermentation mode is started, the refrigeration operation of the low-pressure storage device is stopped, and the heating device is started to heat, the temperature in the storage chamber 20 is increased, and the anaerobic respiration efficiency of anaerobic bacteria is increased in a low-oxygen environment, thereby improving the fermentation efficiency.

[0488] In some embodiments of the present application, the low-pressure storage device includes a pressure detection device; the pressure detection device is used to detect the pressure in the storage chamber 20 to control the working state of the exhaust device or the ventilation unit.

[0489] The controller is configured as:

[0490] When the fifth signal is received, the ventilation unit is closed and the air extraction device is operated; the air pressure in the storage chamber 20 decreases, and the door body 3 drives the storage container 14 to move a certain distance in the closing direction through the guide rail device under the action of the pressure difference on the two opposite sides thereof, and the sealing element 4 is further compressed;

[0491] When the air pressure in the storage chamber 20 drops to a first pressure value, the ventilation unit remains closed, and the air extraction device stops working for a first period of time to reduce the pressure acting on the pickled food in the storage container.

[0492] In an environment with a first pressure value lower than the external ambient pressure of the low-pressure storage device, the pressure difference between the intracellular pressure and the storage chamber 20 in which the cell is located becomes larger; the air pressure of the food tissue, cells and the inter-tissue and inter-cellular spaces is greater than the air pressure in the storage chamber 20 in which the food tissue and inter-cellular spaces expand, providing space for the penetration of the pickling liquid; and in the process of decompression and expansion, micropores will be generated in the cell membrane and cell wall, which is beneficial to the various component molecules in the pickling liquid in the subsequent pickling process, such as: Na + , Cl - Plasma enters the cell.

[0493] When the air extraction device stops working for a first time period, the ventilation unit is opened to increase the air pressure in the storage chamber 20;

[0494] When the air pressure in the storage chamber 20 rises to the third pressure value, the exhaust device remains stopped, and the ventilation unit is closed and remains closed for a third period of time to increase the pressure acting on the pickled food in the storage container.

[0495] In the third pressure environment, the pressure difference between the intracellular pressure and the storage chamber 20 in which the cells are located becomes smaller, so that the pickling liquid components can be pressed into the opened intercellular gaps, enter the cells through the cell membrane and cell wall pores, and are fully pickled.

[0496] In some embodiments of the present application, after the air pressure in the storage chamber 20 rises to a third pressure value and the ventilation unit is closed for a third period of time, a fifth signal is sent to the controller.

[0497] That is, after the controller receives the fifth signal, the pressure in the low-pressure storage device repeatedly switches between the two pressure states of maintaining the first pressure value for the first time and maintaining the third pressure value for the third time. In the above storage environment, the difference between the intracellular pressure of the pickled food and the pressure in its storage chamber 20 is constantly changing, the cell membrane of the pickled food cell is constantly shrinking and expanding, and the membrane pores on the cell membrane are constantly shrinking and expanding, which accelerates the external substance (Na + Mg + , K + , Cl -The process of various ions (such as ions) diffusing into the cells of the food, and the speed of water seeping out of the cells, increases the speed of marinating.

[0498] In some embodiments of the present application, after the air pressure in the storage chamber 20 rises to the third pressure value, when the ventilation unit is closed for a third time, the above pressure reduction operation and pressure increase operation are repeated. The target pressure values ​​after two adjacent pressure reduction operations are not equal and / or the target pressure values ​​after two adjacent pressure increase operations are not equal, so that the pressure difference between the cell and the air pressure in the low-pressure storage device in which it is located has multiple variations.

[0499] Exemplarily, the first pressure reduction reaches a first pressure value of 70-80KPA, and the first pressure increase reaches a second pressure value of 101KPA; the pressure value reached by the second pressure reduction is 60KPA, which is less than the target pressure value of the first pressure reduction - the first pressure value; the pressure value reached by the second pressure increase is 70-80KPA, which is less than the target pressure value of the second pressure increase - the second pressure value.

[0500] In the above operation of increasing the pressure in the low-pressure storage unit to the third pressure value by opening the ventilation unit, the third pressure value is not higher than the external environment pressure of the low-pressure storage device.

[0501] In some embodiments of the present application, when the air pressure in the storage chamber 20 rises to its target pressure value for an even number of times and the closing time of the ventilation unit reaches the target time, a fifth signal is sent to the controller.

[0502] The storage mode of the above-mentioned conversion pressure is recorded as the pickling mode. That is, when the pickling mode is selected, the fifth signal is sent to the controller.

[0503] In some embodiments of the present application, an operation button is provided on the cover plate on the top of the housing 2; when the operation button is triggered, a fifth signal is sent to the controller, that is, when the operation button is pressed, the pickling mode is selected and the pickling program is started.

[0504] In some embodiments of the present application, the low-pressure storage device includes a pressurizing device for adding gas into the low-pressure storage device so that the pressure inside the low-pressure storage device is higher than the external environment, forming a pressurized state.

[0505] In some embodiments of the present application, the low-pressure storage device includes a pressure detection device; the pressure detection device is used to detect the pressure in the storage chamber 20 to control the working state of the exhaust device or the ventilation unit.

[0506] The controller is configured as:

[0507] When the fifth signal is received, the ventilation unit is closed and the air extraction device is operated; the air pressure in the storage chamber 20 decreases, and the door body 3 drives the storage container 14 to move a certain distance in the closing direction through the guide rail device under the action of the pressure difference on the two opposite sides thereof, and the sealing element 4 is further compressed;

[0508] When the air pressure in the storage chamber 20 drops to a first pressure value, the ventilation unit remains closed and the vacuum device stops working for a first period of time to reduce the pressure on the food to be pickled in the storage container and keep the pressure in the storage chamber 20 at the current first pressure value for a first period of time.

[0509] In an environment with a first pressure value lower than the external ambient pressure of the low-pressure storage device, the pressure difference between the intracellular pressure and the storage chamber 20 in which the cell is located becomes larger; the air pressure of the food tissue, cells and the inter-tissue and inter-cellular spaces is greater than the air pressure in the storage chamber 20 in which the food tissue and inter-cellular spaces expand, providing space for the penetration of the pickling liquid; and in the process of decompression and expansion, micropores will be generated in the cell membrane and cell wall, which is beneficial to the various component molecules in the pickling liquid in the subsequent pickling process, such as: Na + , Cl - Plasma enters the cell.

[0510] When the air extraction device stops working for a first time, the pressurizing device starts working and the air pressure in the storage chamber 20 increases;

[0511] When the air pressure in the storage chamber 20 rises to a third pressure value, the vacuum device remains stopped, and the pressurizing device stops working and remains closed for a third period of time to increase the pressure on the food to be pickled in the storage container, and the pressure in the storage chamber 20 remains at the current third pressure value for a third period of time.

[0512] In the third pressure environment, the pressure difference between the intracellular pressure and the storage chamber 20 in which the cells are located becomes smaller, so that the pickling liquid components can be pressed into the opened intercellular gaps, enter the cells through the cell membrane and cell wall pores, and are fully pickled.

[0513] In some embodiments of the present application, after the air pressure in the storage chamber 20 rises to a third pressure value, when the boosting device stops working for a third time period, a fifth signal is sent to the controller.

[0514] That is, after the controller receives the fifth signal, the pressure in the low-pressure storage device repeatedly switches between the two pressure states of maintaining the first pressure value for the first time and maintaining the third pressure value for the third time. In the above storage environment, the difference between the intracellular pressure of the pickled food and the pressure in its storage chamber 20 is constantly changing, the cell membrane of the pickled food cell is constantly shrinking and expanding, and the membrane pores on the cell membrane are constantly shrinking and expanding, which accelerates the external substance (Na + Mg+ , K + , Cl - The process of various ions (such as ions) diffusing into the cells of the food, and the speed of water seeping out of the cells, increases the speed of marinating.

[0515] In some embodiments of the present application, when the boosting device operates to raise the pressure in the storage chamber 20 to a third pressure value, the third pressure value is higher than the external ambient air pressure of the low-pressure storage device.

[0516] In some embodiments of the present application, the low-pressure storage device includes a pressure detection device; the pressure detection device is used to detect the pressure in the storage chamber 20 to control the working state of the exhaust device or the ventilation unit.

[0517] The controller is configured as:

[0518] When the fifth signal is received, the ventilation unit is closed and the air extraction device is operated; the air pressure in the storage chamber 20 decreases, and the door body 3 drives the storage container 14 to move a certain distance in the closing direction through the guide rail device under the action of the pressure difference on the two opposite sides thereof, and the sealing element 4 is further compressed;

[0519] When the air pressure in the storage chamber 20 drops to the first pressure value, the ventilation unit remains closed, and the air extraction device stops working for a first time period, so that the pressure in the storage chamber 20 remains at the current first pressure value for a first time period.

[0520] In an environment with a first pressure value lower than the external ambient pressure of the low-pressure storage device, the pressure difference between the intracellular pressure and the storage chamber 20 in which the cell is located becomes larger; the air pressure of the food tissue, cells and the inter-tissue and inter-cellular spaces is greater than the air pressure in the storage chamber 20 in which the food tissue and inter-cellular spaces expand, providing space for the penetration of the pickling liquid; and in the process of decompression and expansion, micropores will be generated in the cell membrane and cell wall, which is beneficial to the various component molecules in the pickling liquid in the subsequent pickling process, such as: Na + , Cl - Plasma enters the cell.

[0521] When the air extraction device stops working for a first time period, the ventilation unit or the pressurizing device is turned on, and the air pressure in the storage chamber 20 increases;

[0522] When the air pressure in the storage chamber 20 rises to a third pressure value, the air extraction device remains stopped, and the ventilation unit or the pressurizing device is closed and remains closed for a third time period, so that the pressure in the storage chamber 20 remains at the current third pressure value for a third time period;

[0523] When the ventilation unit or the booster device is closed for a third period of time, the booster device operates;

[0524] When the air pressure in the storage chamber 20 rises to a fourth pressure value, the booster stops working and remains closed for a fourth time period, so that the pressure in the storage chamber 20 remains at the current fourth pressure value for a fourth time period.

[0525] In the fourth pressure environment, the pressure difference between the intracellular pressure and the storage chamber 20 in which the cells are located becomes smaller, so that the pickling liquid components can be pressed into the opened intercellular gaps, enter the cells through the cell membrane and cell wall pores, and are fully pickled.

[0526] In some embodiments of the present application, after the air pressure in the storage chamber 20 rises to a fourth pressure value, when the boosting device stops working for a fourth time period, a fifth signal is sent to the controller.

[0527] That is, after the controller receives the fifth signal, the pressure in the low-pressure storage device repeatedly switches between the two pressure states of maintaining the first pressure value for the first time and maintaining the fourth pressure value for the fourth time. In the above storage environment, the difference between the intracellular pressure of the pickled food and the pressure in the storage chamber 20 is constantly changing, the cell membrane of the pickled food cells is constantly shrinking and expanding, and the membrane pores on the cell membrane are constantly shrinking and expanding, which accelerates the external substance (Na + Mg + , K + The process of various ions (such as Cl-) diffusing into the cells of the food, and the speed of water seeping out of the cells, increases the speed of marinating.

[0528] In some embodiments of the present application, the first pressure value is less than the third pressure value and less than the fourth pressure value.

[0529] In some embodiments of the present application, the fourth pressure value is higher than the external ambient pressure of the low-pressure storage device.

[0530] In some embodiments of the present application, in the operation of increasing the pressure in the low-pressure storage unit to a third pressure value by a pressurizing device, the third pressure value is not lower than the external ambient air pressure of the low-pressure storage device.

[0531] In some embodiments of the present application, the first pressure value is set to any value between 0.6 atm and 0.7 atm, and the third pressure value is set to any value between 0.9 atm and 1 atm.

[0532] In some embodiments of the present application, after the electronic ventilation unit 31 is ventilated, the air pressure in the low-pressure storage unit increases; the low-pressure storage unit maintains a slightly negative pressure state, that is, the third pressure value is greater than the first pressure value and less than the normal pressure. The third pressure value can be set to 0.9atm. The above setting ensures that there is always a pressure difference between the internal and external air pressures of the low-pressure storage unit, ensures that the door body 3 and the shell 2 of the drawer unit are always in a compressed state, and the sealing element 4 remains in a compressed state, thereby improving the vacuuming efficiency.

[0533] In some embodiments of the present application, the third pressure value is less than the second pressure value, and the second pressure value is less than the external environment pressure. That is, when the marinating mode is started, the pressure is controlled within a range less than the second pressure value to avoid starting the air extraction device.

[0534] In some embodiments of the present application, when the controller receives the fifth signal, the air extraction device maintains its current working state when the pressure in the low-pressure storage device 12 rises above the second pressure value.

[0535] In some embodiments of the present application, when the controller receives the fifth signal, the pressure in the storage chamber 20 detected by the pressure detection device is not compared with the second pressure value.

[0536] In some embodiments of the present application, when the controller receives the fifth signal, the pressure detection device does not send the comparison result between the detected pressure in the storage chamber 20 and the second pressure value to the controller.

[0537] In some embodiments of the present application, when the controller receives the fifth signal, the controller ignores the comparison result between the pressure in the storage chamber 20 detected by the pressure detection device and the second pressure value.

[0538] In some embodiments of the present application, the air extraction device includes a vacuum pump, an air extraction pipeline and an air outlet pipeline connected to the vacuum pump; the air extraction pipeline is connected to the storage chamber, and the air outlet pipeline is connected to the external environment of the low-pressure storage device;

[0539] When the vacuum device is working, the vacuum pump is working, and the gas in the low-pressure storage device is discharged through the vacuum pipeline, the vacuum pump, and the gas outlet pipeline in sequence to reduce the air pressure in the storage room;

[0540] The booster device includes a booster vacuum pump, a booster exhaust pipeline and a booster outlet pipeline connected to the booster vacuum pump; the booster outlet pipeline is connected to the storage chamber, and the booster exhaust pipeline is connected to the external environment of the low-pressure storage device;

[0541] When the booster device is working, the booster vacuum pump works, and the external environment gas enters the low-pressure storage device through the booster exhaust pipeline, the vacuum pump, and the booster outlet pipeline in sequence to increase the air pressure in the storage room.

[0542] In some embodiments of the present application, the booster device is a vacuum pump of an exhaust device; the exhaust pipeline of the vacuum pump is divided into a first exhaust branch and a second exhaust branch through a first valve, wherein the first exhaust branch is connected to the storage chamber, and the second exhaust branch is connected to the external environment of the low-pressure storage device; the outlet pipeline of the vacuum pump is divided into a first outlet branch and a second outlet branch through a second valve, wherein the first outlet branch is connected to the external environment of the low-pressure storage device, and the second outlet branch is connected to the low-pressure storage device.

[0543] When the vacuum device is working, the first valve connects the vacuum pipeline with the first vacuum branch and disconnects the vacuum pipeline from the second vacuum branch; the second valve connects the outlet pipeline with the first outlet branch and disconnects the outlet pipeline from the second outlet branch. When the vacuum pump is working, the gas in the low-pressure storage device is discharged through the first vacuum branch, the vacuum pipeline, the vacuum pump, the outlet pipeline, and the first outlet branch in sequence to reduce the air pressure in the storage room.

[0544] When the booster device is working, the first valve connects the air extraction pipeline with the second air extraction branch, and disconnects the air extraction pipeline from the first air extraction branch; the second valve connects the air outlet pipeline with the second air outlet branch, and disconnects the air outlet pipeline from the first air outlet branch. In vacuum operation, the external environment gas enters the low-pressure storage device through the second air extraction branch, the air extraction pipeline, the vacuum pump, the air outlet pipeline, and the second air outlet branch in turn to increase the pressure of the low-pressure storage device.

[0545] In some embodiments of the present application, the boosting device is configured as an air compressor, which increases the pressure inside the low-pressure storage device by compressing the gas outside the low-pressure storage device and sending it into the low-pressure storage device.

[0546] In some embodiments of the present application, the refrigerator is provided with a third timer for recording the time after the controller receives the fifth signal. When the time after the controller receives the fifth signal reaches the preset total marinating time, the marinating is ended and the marinating mode is exited.

[0547] In some embodiments of the present application, the refrigerator is provided with a ventilation unit. When the time reaches the preset total marinating time after the controller receives the fifth signal, the marinating is ended, and the ventilation unit is opened, and the gas outside the low-pressure storage device enters the low-pressure storage device through the ventilation device, and the exhaust device extracts the gas in the low-pressure storage device to quickly update the gas in the low-pressure storage device and deodorize the low-pressure storage device.

[0548] In some embodiments of the present application, the refrigerator is provided with a separate boosting unit (air compressor / boosting pump). When the controller receives the fifth signal and the time reaches the preset total marinating time, the marinating is terminated, the boosting device (air compressor / boosting pump) introduces gas into the low-pressure storage device, and the exhaust device extracts the gas in the low-pressure storage device to quickly update the gas in the low-pressure storage device and deodorize the low-pressure storage device.

[0549] The refrigerator is equipped with a display unit, and the controller controls the display unit to display a countdown of the total pickling time to show the pickling progress to the user.

[0550] In some embodiments of the present application, the refrigerator is equipped with a reminder unit for reminding the user that the pickling is finished. When the total pickling time countdown reaches 0, the reminder unit sends a reminder signal to remind the user that the pickling is finished.

[0551] In some embodiments of the present application, a display unit is disposed on a door of the refrigerator for interaction with a user.

[0552] In some embodiments of the present application, the refrigerator is configured with a communication unit connected to the controller; the communication unit is wirelessly connected to the mobile terminal and is used to display a countdown of the total pickling time to show the user the pickling progress.

[0553] In some embodiments of the present application, after the controller receives the fifth signal and turns on the pickling mode, the temperature of the variable temperature chamber is adjusted to the first temperature so that the pickling is carried out in a suitable temperature environment, thereby speeding up the pickling progress.

[0554] In some embodiments of the present application, different types of food have different first temperatures of the variable temperature chamber during the pickling process. For example, when fresh food is pickled, the temperature of the variable temperature chamber is 0°, and the first temperature of meat or vegetables is 5°.

[0555] In some embodiments of the present application, the low-pressure storage unit is provided with a plurality of operation buttons to distinguish the marinating modes of different ingredients. In the marinating modes of different ingredients, different types of ingredients correspond to different pressure value changes during the marinating process, and different types of ingredients correspond to different first temperatures in the low-pressure storage device during the marinating process.

[0556] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

[0557] For the convenience of explanation, the above description has been made in conjunction with specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or limit the embodiments to the specific forms disclosed above. Based on the above teachings, various modifications and variations can be obtained. The selection and description of the above embodiments are to better explain the principles and practical applications, so that those skilled in the art can better use the embodiments and various different variations of the embodiments suitable for specific use considerations.

Claims

1. A refrigerator, characterized in that include: a box body defining a storage room; A low-pressure storage device, housed in the storage room; an air extraction device connected to the low-pressure storage unit and used to extract the air in the low-pressure storage unit to form a low-pressure state in the low-pressure storage device; The low-pressure storage device comprises: a housing defining a storage chamber having a storage opening; A door body, used to open or close the storage opening; A pressure detection device, used to detect the pressure in the storage chamber to adjust the working state of the air extraction device; A storage container, fixedly connected to the door body, for containing items; A sealing element, provided on the door body or the housing, for making the door body seal and cooperate with the housing when closing the storage opening; A guide rail device, which connects the storage container and the housing; the storage container is pushed into or pulled out of the storage chamber through the guide rail device; A locking structure, used to lock the door body and the housing when the storage container is pushed into the storage chamber and the sealing element is compressed; During the process of closing the door body from an open state, the door body drives the storage container to move in a closing direction, and the storage container is pushed into the storage chamber; when the door body closes the storage opening and the sealing element is squeezed by the door body and the shell, the locking structure locks the door body and the shell; When the locking structure locks the door body and the housing and starts the air extraction device, the air extraction device works at a first air extraction rate; the air extraction speed of the first air extraction rate is greater than the speed at which the external environment gas enters the storage chamber, and an air pressure difference is formed on opposite sides of the door body, so as to push the door body to drive the storage container to move a certain displacement in the closing direction, and the sealing element is further compressed; When the air pressure in the storage chamber is reduced to the air extraction conversion pressure, the air extraction device is reduced from the first air extraction efficiency to the second air extraction efficiency; When the air pressure in the storage chamber decreases from the air extraction conversion pressure to the first pressure value, the air extraction device stops working.

2. A refrigerator, characterized in that include: a box body defining a storage room; A low-pressure storage device, housed in the storage room; an air extraction device connected to the low-pressure storage unit and used to extract the air in the low-pressure storage unit to form a low-pressure state in the low-pressure storage device; The low-pressure storage device comprises: a housing defining a storage chamber having a storage opening; A door body, used to open or close the storage opening; A storage container, fixedly connected to the door body, for containing items; A sealing element, provided on the door body or the housing, for making the door body seal and cooperate with the housing when closing the storage opening; A guide rail device, which connects the storage container and the housing; the storage container is pushed into or pulled out of the storage chamber through the guide rail device; A locking structure, used to lock the door body and the housing when the storage container is pushed into the storage chamber and the sealing element is compressed; A second position detection device is used to detect whether the door body moves to the air extraction change position or the vacuum sealing position, so as to adjust the working state of the air extraction device; During the process of closing the door body from an open state, the door body drives the storage container to move in a closing direction, and the storage container is pushed into the storage chamber; when the door body closes the storage opening and the sealing element is squeezed by the door body and the shell, the locking structure locks the door body and the shell; When the locking structure locks the door body and the housing and starts the air extraction device, the air extraction device works at a first air extraction rate, wherein the air extraction speed of the first air extraction rate is greater than the speed at which the external environment gas enters the storage chamber, and an air pressure difference is formed on opposite sides of the door body, so as to push the door body to drive the storage container to move a certain displacement in the closing direction, and the sealing element is further compressed; When the door body moves to the air extraction change position, the air extraction efficiency of the air extraction device is reduced to the second air extraction efficiency; When the door body moves to the vacuum sealing position, the air extraction device stops working.

3. The refrigerator according to claim 2, characterized in that: The second position detection device is arranged on the rear wall of the housing; the second position detection device comprises a transmitting end and a receiving end; The transmitting end emits a light beam toward the wall surface of the storage container close to the rear wall of the shell. The wall surface of the storage container close to the rear wall of the shell is on the optical path of the light beam emitted by the transmitting end. The light beam emitted by the transmitting end is reflected, and the reflected light beam is received by the receiving end and converted into an electrical signal for output. According to the intensity difference and time difference of the reflected light, it can be judged whether the door body moves to the air extraction change position or the vacuum sealing position.

4. A refrigerator, characterized in that include: a box body defining a storage room; A low-pressure storage device, housed in the storage room; an air extraction device connected to the low-pressure storage unit and used to extract the air in the low-pressure storage unit to form a low-pressure state in the low-pressure storage device; The low-pressure storage device comprises: a housing defining a storage chamber having a storage opening; A door body, used to open or close the storage opening; A pressure detection device, used to detect the pressure in the storage chamber to adjust the working state of the air extraction device; A storage container, fixedly connected to the door body, for containing items; A sealing element, provided on the door body or the housing, for making the door body seal and cooperate with the housing when closing the storage opening; A guide rail device, which connects the storage container and the housing; the storage container is pushed into or pulled out of the storage chamber through the guide rail device; A locking structure is used to lock the door body and the housing in a pre-locking position when the storage container moves in the pushed direction; and the locking structure allows the door body to continue to move a certain distance in the closing direction under the action of the pressure difference on both sides thereof when the air extraction device is working; A second position detection device is used to detect whether the door body moves to the air extraction change position to adjust the working state of the air extraction device; When the locking structure locks the door body and the housing and starts the air extraction device, the air extraction device works at a first air extraction rate; the air extraction speed of the first air extraction rate is greater than the speed at which the external environment gas enters the storage chamber, and an air pressure difference is formed on opposite sides of the door body, so as to push the door body to drive the storage container to move a certain displacement in the closing direction, and the sealing element is further compressed; When the door body moves to the air extraction change position, the air extraction device reduces the first air extraction efficiency to the second air extraction efficiency; When the air pressure in the storage chamber drops to a first pressure value, the air extraction device stops working.

5. A refrigerator, characterized in that include: a box body defining a storage room; A low-pressure storage device, housed in the storage room; an air extraction device connected to the low-pressure storage unit and used to extract the air in the low-pressure storage unit to form a low-pressure state in the low-pressure storage device; The low-pressure storage device comprises: a housing defining a storage chamber having a storage opening; A door body, used to open or close the storage opening; A storage container, fixedly connected to the door body; A guide rail device connecting the storage container and the housing so that the storage container can be pushed into or pulled out of the storage chamber; A sealing element is provided on the door body or the shell; when the door body is in a closed position, the sealing element is squeezed by the shell and the door body; A locking structure, used to lock the door body and the housing when the storage container is pushed into the storage chamber and the sealing element is compressed; A second position detection device, used to detect whether the door body moves to the air extraction change position, so as to adjust the working state of the air extraction device; a third position detection device, used to detect whether the door body has moved to the vacuum sealing position, so as to adjust the working state of the air extraction device; During the process of closing the door body from an open state, the door body drives the storage container to move in a closing direction, and the storage container is pushed into the storage chamber; when the door body closes the storage opening and the sealing element is squeezed by the door body and the shell, the locking structure locks the door body and the shell; When the locking structure locks the door body and the housing and starts the air extraction device, the air extraction device works at a first air extraction rate; the air extraction speed of the first air extraction rate is greater than the speed at which the external environment gas enters the storage chamber, and an air pressure difference is formed on opposite sides of the door body, so as to push the door body to drive the storage container to move a certain displacement in the closing direction, and the sealing element is further compressed; When the door body moves to the air extraction change position, the air extraction efficiency of the air extraction device is reduced to the second air extraction efficiency; When the door body moves to the vacuum sealing position, the air extraction device stops working.

6. The refrigerator according to claim 2 or 5, characterized in that: The second position detection device includes a second proximity detection device fixed on the housing, and a second proximity sensor fixed on the door or the storage container; When the door body moves to the air extraction change position, the second proximity sensing body corresponds to the position of the second proximity detection device and acts on the second proximity detection device to transmit a signal indicating that the door body is closed to the air extraction change position; When the door is opened, the second proximity sensing body is away from the second proximity detecting device and cannot have any effect on the second proximity detecting device, and the second proximity detecting device has no signal transmission.

7. The refrigerator according to claim 5, characterized in that: The third position detection device includes a third proximity detection device fixed on the housing, and a third proximity sensor fixed on the door or the storage container; When the door body moves to the vacuum sealing position, the third proximity sensing body corresponds to the position of the third proximity detection device and acts on the third proximity detection device to transmit a signal indicating that the door body is closed to the vacuum sealing position; When the door is opened, the third proximity sensing body is away from the third proximity detection device and cannot have any effect on the third proximity detection device, and the third proximity detection device has no signal transmission.

8. The refrigerator according to any one of claims 1 to 5, characterized in that: The vacuum pump comprises a vacuum pump; the vacuum pump working at a first rotation speed is defined as the vacuum pump working at a first pumping rate; the vacuum pump working at a second rotation speed is defined as the vacuum pump working at a second pumping rate; The ratio of the first rotational speed of the vacuum pump to the rated rotational speed of the vacuum pump is any value between 0.8 and 1; the ratio of the second rotational speed of the vacuum pump to the rated rotational speed of the vacuum pump is any value between 0.5 and 0.

8.

9. The refrigerator according to any one of claims 1 to 5, characterized in that: The vacuum pump comprises a vacuum pump; the vacuum pump working at a first power is defined as the vacuum pump working at a first vacuum rate; the vacuum pump working at a second power is defined as the vacuum pump working at a second vacuum rate; The ratio of the first power of the vacuum pump to the rated power of the vacuum pump is any value between 0.8 and 1; the ratio of the second power of the vacuum pump to the rated power of the vacuum pump is any value between 0.5 and 0.

8.

10. The refrigerator according to claim 1 or 2 or 3 or 4 or 5 or 7, characterized in that: The guide rail device comprises an inner rail and an outer rail which are movably connected, the inner rail is fixedly connected to the storage container, and the outer rail is fixedly connected to the inner wall of the shell; The inner rail has a locking groove at one end close to the rear wall of the shell, and the outer rail has a locking slider at one end close to the rear wall of the shell; When the door body is closed, the door body moves with the inner rail toward the rear wall of the housing, and the inner rail drives the locking groove to approach the locking slider; The locking slider undergoes elastic deformation and enters the locking groove, and then the locking slider at least partially recovers to complete locking with the locking groove; When the locking structure locks the door body and the shell and the vacuum device is working, under the action of the pressure difference between the side of the door body close to the external environment and the side of the door body close to the storage chamber, the locking groove continues to move a certain distance in the closing direction relative to the locking slide buckle.

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