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 sealing element, a storage container fixedly connected with the door body, a guide rail device connected with the storage container and the shell so that the storage container can be pushed into or pulled out of the storage chamber along the guide rail device, and a locking structure used for locking the door body and the shell when the door body is closed. When the door body is closed, the door body and the shell are locked by the locking structure; the door body and the shell extrude the sealing element; when the air extractor works, the air pressure in the storage chamber is reduced, under the action of the difference between the pressure of the side, close to the outside, of the door body and the pressure of the side, close to the storage chamber, of the door body, the door body drives the storage container to move in the closing direction through the guide rail device, and the sealing element is further pressed. The vacuum pumping device is simple in structure, small in occupied space and low in requirement for user operation, and can meet the requirement for vacuum pumping.

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 drawer is installed in the refrigerator, and the vacuum drawer is evacuated by a vacuum pump. The main function of vacuum pumping is to deoxygenate the vacuum drawer to prevent food from spoiling. At present, refrigerators with vacuum pumping function are provided with locking structures such as handles to ensure the sealing of the vacuum drawer, and the vacuum drawer is locked by manual operation of the user. The locking operation of the vacuum drawer is necessary for the user and requires precise operation, and the locking structure is complicated and takes up space. Summary of the invention

[0003] The invention solves one of the technical problems in the related art at least to some extent.

[0004] 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.

[0005] The refrigerator according to the present application comprises: A box body, which defines 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 sealing element is provided on the door body or the housing so as to form an airtight joint between the housing and the door body when the door body is in the closed position; 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 along the guide rail device; A locking structure, used to lock the door body and the housing when the door body is closed; When the door body is closed, the locking structure locks the door body and the shell; the door body and the shell squeeze the sealing element; When the vacuum device is working, the air pressure in the storage chamber decreases. Under the action of the pressure difference between the side of the door body close to the outside and the side of the door body 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.

[0006] In some embodiments, the locking structure is a push-to-open locking structure; by pressing the push-to-open locking structure once, the push-to-open locking structure switches between a locked state and an unlocked state; The sealing element has a maximum deformable distance L 0 The push-to-lock structure has an unlocking stroke J 0 ; When the door body is locked by the locking structure, the sealing element is compressed to a length that reaches the pre-locking compression distance L 1 When the vacuum device completes the vacuuming, the length of the sealing element compressed is the vacuum compression distance L 2 ; Among them, L 2 -L 1 ≥J 0 , L 0 -L 1 ≥J 0 .

[0007] In some embodiments, when the vacuum pumping device completes the vacuuming, the internal pressure value of the low-pressure storage device is P 1 The pressure value outside the door of the low-pressure storage device is P 0 The area of ​​the door is S, and the force of the push-to-lock structure to trigger the door to open is F 1 ; Among them, F 1 <(P 0 -P 1 )*S.

[0008] In some embodiments, the locking structure is a push-to-open locking structure; by pressing the push-to-open locking structure once, the push-to-open locking structure switches between a locked state and an unlocked state; The sealing element has a maximum deformable distance L 0 The push-to-lock structure has an unlocking stroke J 0 ; When the door body is locked by the locking structure, the sealing element is compressed to a length that reaches the pre-locking compression distance L 1 When the vacuum device completes the vacuuming, the length of the sealing element compressed is the vacuum compression distance L 2 ; Among them, L 2 -L 1 <J 0 , L 0 -L 1 ≥J 0 .

[0009] In some embodiments, the locking structure has a double self-locking function; When the door body is closed, after the door body moves a first distance, the door body and the shell complete the first-level locking; the door body and the shell squeeze the sealing element; The air extraction device works, the door body continues to move a second distance in the closing direction, and the door body and the shell complete the second-level locking.

[0010] In some embodiments, the guide rail device has an inner rail and an outer rail; the inner rail is fixedly connected to the inner wall of the shell, the outer rail is fixedly connected to the storage container, and the inner rail and the outer rail are movably connected; The inner rail is provided with a first locking portion, and the outer rail is provided with a second locking portion; after the door body is closed and moves a first distance, the first locking portion cooperates with the second locking portion to complete the first level of locking.

[0011] In some embodiments, the outer rail is provided with a first connecting member rotatably connected thereto, and the first locking portion is provided on the first connecting member; A torsion spring is provided between the first connecting member and an end of the outer rail away from the storage opening; When the door body is closed, when the first locking part cooperates with the second locking part, the first connecting member rotates and squeezes the torsion spring, so that the torsion spring is compressed in the radial direction. When the first locking part and the second locking part are locked to complete the first level of locking, the torsion spring reaches a critical value of the torsion spring; Afterwards, the torsion spring begins to stretch, and under the action of the torsion spring, the torsion spring drives the inner rail to continue to move a second distance in the closing direction through the first connecting member, thereby completing the second-level locking.

[0012] In some embodiments, the storage room has a take-out opening; the refrigerator includes two doors arranged opposite to each other, and the two doors arranged opposite to each other cooperate to open or close the take-out opening; wherein a flip beam is provided on the inner lining surface of one door close to the other door; when the two doors are closed, the flip beam flips and seals the gap between the doors and the box body; The rotation axis of the flip beam is recorded as the flip axis M; the flip beam includes a free end parallel to the flip axis M, and the free end rotates around the flip axis M; When the box door is closed, on the projection of the plane where the access opening is located, the direction perpendicular to the flip axis M of the flip beam is recorded as the first direction; During the closing process of the box door, the flip beam interacts with the door body, and under the action of the flip beam, the door body moves along the second moving direction through the guide rail device, so that the locking structure locks the door body and the shell.

[0013] In some embodiments, on the projection of the plane where the access port is located, the midpoint of the projection of the door body along the first moving direction is marked as O; the reference line passing through the midpoint O and perpendicular to the first direction is marked as the first reference line L; During the closing process of the box door, on the projection of the plane where the access opening is located, the projection of the flip beam overlaps with the first reference line L of the door body.

[0014] In some embodiments, in the direction perpendicular to the plane where the access port is located, the maximum displacement of the free end of the flip beam entering the storage room during the flipping process is recorded as W; when the door body and the shell are locked by the locking structure, the distance between the front end of the door body and the plane where the access port is located is recorded as D; D≤W.

[0015] Compared with the prior art, the advantages and positive effects of the present invention are: 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 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 can be pushed into or extracted from 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; the door body and the shell squeeze the sealing element; when the exhaust device is working, the air pressure in the storage chamber decreases, and the pressure on the side of the door body close to the outside is reduced. Under the action of the pressure difference on the side of the door body close to the storage room, 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; the arrangement of the present invention has a simple structure, occupies a small space, has low requirements for user operation, and can meet the needs of vacuuming; the above scheme set up in the present application breaks the conventional setting method of forming a high-sealing environment before vacuuming (the user applies external force to lock the door body and the shell through the locking device). The present invention only locks the door body and the shell to form a pre-sealed condition through a locking structure with a small volume and small locking force, and then uses the negative pressure generated by vacuuming to assist in forming a high-sealing condition to meet the vacuum sealing condition. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] 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.

[0017] Figure 1 is a three-dimensional diagram of a refrigerator of the present invention; 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; 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; Figure 4 is a cross-sectional view of a low-pressure storage device of a refrigerator of the present invention; Figure 5 yes Figure 4 A magnified image of area A; Figure 6 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; Figure 7 It is a schematic structural diagram of a refrigerator of the present invention when the guide rail device provided with a locking structure having a double self-locking function is in an open state; Figure 8 It is a structural schematic diagram of the refrigerator of the present invention when the guide rail device provided with a locking structure having a double self-locking function is in a closed state; Fig. 9 It is a schematic structural diagram of a refrigerator of the present invention when the guide rail device provided with a locking structure of a lock switch type is in an open state; Fig.10 It is a schematic structural diagram of the refrigerator of the present invention when the door is closed; Fig.11 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; Fig.12 It is a schematic diagram of the exploded structure of the low-pressure storage device of the refrigerator of the present invention; Fig.13 is a schematic diagram of the exploded structure of the low-pressure storage device of the refrigerator of the present invention from another perspective; Fig.14 is a schematic diagram of the exploded structure of the low-pressure storage device of the refrigerator of the present invention from another perspective; Fig.15 It is a schematic structural diagram of the adapter plate and the power supply device of the refrigerator of the present invention; Fig.16 It is a schematic diagram of the exploded structure of the adapter plate and the power supply device of the refrigerator of the present invention; Fig.17 It is a structural schematic diagram of the adapter plate, the power supply device and the ion generating module of the refrigerator of the present invention; Fig.18 It is a schematic diagram of the exploded structure of the adapter plate, the power supply device and the gas-controlled membrane assembly of the refrigerator of the present invention; Fig.19 It is a schematic diagram of the exploded structure of the adapter plate, the power supply device and the ion generating module of the refrigerator of the present invention; Fig. 20It is a structural schematic diagram of a low-pressure storage device and a photodynamic sterilization module of a refrigerator of the present invention; Fig.21 It is a structural schematic diagram of the low-pressure storage device and the photodynamic sterilization module of the refrigerator of the present invention from another perspective; Fig. 22 It is a schematic structural diagram of the adapter plate, the power supply device and the photodynamic sterilization module of the refrigerator of the present invention; Fig.23 It is a schematic diagram of the exploded structure of the housing and the photodynamic sterilization module of the low-pressure storage device of the refrigerator of the present invention; Fig.24 It is a cross-sectional view of the housing of the low-pressure storage device and the photodynamic sterilization module of the refrigerator of the present invention.

[0018] In the above figures: box body 10; box door 11; storage room 12; access opening 13; storage container 14; protective cover 16; cover shell 17; matching plate 18; support plate 19; electronic ventilation unit 31; vacuum pump 32; inner rail 33; middle rail 34; outer rail 35; nitrogen and oxygen separation membrane 36; Shell 2; storage chamber 20; storage port 21; sealing ridge 22; groove 23; support platform 24; mounting groove 25; first mounting hole 26; second mounting hole 27; opening 28; Door body 3; connecting groove 30; Sealing element 4; first connecting strip 40; matching strip 41; second connecting strip 42; connecting portion 43; hooking portion 44; sealing groove 45; Flip beam 5; free end 50; Conductive column 6; first conductive part 61; second conductive part 62; fixing plate 63; sealing member 64; gland 65; shield 66; sealing strip 67; Adapter plate 7; receiving portion 70; sealing ring 71; A first circuit board 90; a discharge module 91; Glass plate 8; mounting strip 80; Second circuit board 92; light emitting component 93. DETAILED DESCRIPTION

[0019] 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.

[0020] 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 ordinary and common meanings.

[0021] 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.

[0022] 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.

[0023] 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.

[0024] 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 ordinary and common meanings.

[0025] 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.

[0026] 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.

[0027] Please refer to Figure 1-Figure 22 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.

[0028] 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.

[0029] 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 .

[0030] 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 a pipeline connected between the vacuum pump 32 and the low-pressure storage device. 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.

[0031] The refrigerator is provided with a controller, and the controller can control the vacuum device to evacuate the low-pressure storage device, so as to realize automatic control of the vacuum evacuation of the low-pressure storage device.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] like Figure 1-Figure 3 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 storage container 14 is pushed into the storage chamber 20, the door body 3 closes the storage opening 21. 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.

[0036] Among them, the shell 2 has a shell rear wall arranged opposite to the storage port 21; the direction along the shell rear wall pointing to the plane where the storage port 21 is located is recorded as the first moving direction, and the direction along the plane where the storage port 21 is located pointing to the shell rear wall is recorded as the 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.

[0037] When the storage chamber 20 is closed by the door 3 and the vacuum device is activated, 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, at the end of the vacuuming process, 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 refer to it as a "vacuum chamber".

[0038] In some embodiments of the present application, the door body 3 may be provided with a sealing element 4, so that when the door body 3 is in a closed position, an airtight joint is formed between the housing 2 and the door body 3, thereby preventing gas from entering the low-pressure storage chamber 12 from the joint between the housing 2 and the door body 3. As another possible arrangement, the sealing element 4 may also be provided at the front end of the housing 2, for example, connected to the front end wall of the housing 2. When the door body 3 closes the storage opening 21, the door body 3 and the housing 2 are sealed and matched through the sealing element 4, and the storage chamber 20 of the housing 2 forms a closed storage space.

[0039] In some embodiments of the present application, the sealing element 4 is annular.

[0040] In some embodiments of the present application, the sealing element 4 is a compressible sealing member.

[0041] 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 housing 2. The maximum length of the sealing element 4 deformed by being compressed from its natural state is recorded as the maximum deformable distance L. 0 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 wall of the housing 2, and the compressed deformation length of the sealing element 4 is not greater than the maximum deformable distance L 0 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 returns to a natural state.

[0042] In some embodiments of the present application, the sealing element 4 is a rubber seal.

[0043] In some embodiments of the present application, the sealing element 4 may be configured as an airbag seal.

[0044] In some embodiments of the present application, Figure 4-Figure 5 As shown, the sealing element 4 is disposed on the door body 3 , and is annular and surrounds the storage container 14 , so that when the door body 3 and the housing 2 are closed, the sealing element 4 surrounds the storage opening 21 for sealing.

[0045] The sealing element 4 has a first connecting strip 40, a matching strip 41, and a second connecting strip 42. A connecting groove 30 is formed on the door body 3 around the storage container 14, and the first connecting strip 40 is installed in the connecting groove 30, and the first connecting strip 40 is sealed and connected to the connecting groove 30, so as to seal and fix the sealing element 4 to the door body 3.

[0046] The matching 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 matching strip 41 close to the housing 2. A sealing convex strip 22 is provided at the front end of the housing 2. 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.

[0047] 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 deformation space of the sealing convex strip 22 .

[0048] The second connecting strip 42 is located on the side of the matching strip 41 close to the shell 2, and the second connecting strip 42 is located on the side of the sealing groove 45 close to the storage container 14. That is, the second connecting strip 42 is surrounded by the sealing groove 45, and the sealing groove 45 surrounds the periphery of the second connecting strip 42. The second connecting strip 42 includes a connecting portion 43 extending from one end connected to the matching strip 41 to a side away from the first connecting strip 40, and a hook portion 44 extending from one end of the connecting portion 43 away from the first connecting strip 40 to a side close to the sealing groove 45. A groove 23 is provided on the bottom wall of the storage chamber 20, and the groove 23 is close to the storage port 21. When the door body 3 is closed, the connecting portion 43 extends into the storage chamber 20 and is located above the bottom wall of the storage chamber 20; the hook portion 44 is matched with the groove 23.

[0049] 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.

[0050] 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 of the low-pressure storage device. When the vacuum device is started, the ventilation unit disconnects the storage chamber 20 from the external environment of the low-pressure storage device. When the low-pressure storage device needs to be opened, the ventilation unit connects the storage chamber 20 with the external environment of the low-pressure storage device, and the gas of the external environment enters the low-pressure storage device, and the difference between the atmospheric pressure of the external environment and the pressure in the storage chamber 20 gradually decreases; at this time, the user has little resistance when pulling the drawer unit out of the storage chamber 20, which is convenient for the user to operate.

[0051] In some embodiments of the present application, the ventilation unit is configured as an electronic ventilation unit 31. As a configurable manner, when the electronic ventilation unit 31 is powered off, the storage chamber 20 is disconnected from the external environment, and the storage chamber 20 maintains its sealed vacuum state. 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 valve, so that the inside of the low-pressure storage unit is connected to the outside. The electronic ventilation unit 31 is configured as an electronic ventilation valve.

[0052] In some embodiments of the present application, the electronic ventilation unit 31 is disposed on the housing 2 , and a vibration damping member is disposed between the electronic ventilation unit 31 and the housing 2 to reduce vibration and noise caused by the electronic ventilation unit 31 when working.

[0053] 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.

[0054] In some embodiments of the present application, the low-pressure storage unit is provided with a vent hole connecting the opposite sides thereof, so that when the door body 3 is closed, the vent hole is opened by the vent unit to connect the storage chamber 20 with the outside, so that the outside gas enters the storage chamber 20 through the vent hole to balance the internal and external air pressures.

[0055] In some embodiments of the present application, Figure 6-Figure 20 As shown, the ventilation unit is configured as a mechanical button type, 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.

[0056] See also Figure 6-Figure 9 A retractable guide rail device is provided between the storage container 14 and the shell 2, so that the door body 3 and the storage container 14 can be smoothly pulled out of the shell 2 or pushed into the shell 2. Among them, the low-pressure storage device is provided with a locking structure to lock the door body 3 and the shell 2 when the door body 3 is closed.

[0057] As a configurable method, the locking structure is arranged on the guide rail device, and is used to lock the door body 3 in the pre-locking position when the door body 3 closes the storage opening 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 under the action of the force. Among them, when the locking structure locks the door body 3 in the pre-locking position, under the action of the door body 3 and the shell 2, the sealing element 4 is in a compressed state to ensure that the pre-locking position has a certain sealing performance. When in the pre-locking position, the length by which the sealing element 4 is compressed is recorded as the pre-locking compression distance L 1 , where the pre-locking compression distance L 1 Less than the maximum deformable distance L 0, so that when the door body 3 continues to move in the closing direction from the pre-locking position, the sealing element 4 is further compressed, and the sealing performance between the door body 3 and the housing 2 is enhanced.

[0058] When the door body 3 closes the storage port 21 and the sealing element 4 is compressed to a length reaching the pre-locking compression distance L 1 , the locking structure on the guide rail device locks the door body 3 and the housing 2 in the pre-locking position. In the pre-locking position, 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 drives the storage container 14 to produce a slight displacement along the first moving direction through the guide rail device, and the sealing element 4 is further compressed. After the vacuuming is completed, the length of the sealing element 4 compressed is the vacuum compression distance L 2 , which is greater than the pre-locking compression distance L 1 The sealing performance of the door body 3 and the shell 2 is enhanced, and the sealing performance of the closed storage cavity formed by the door body 3 and the shell 2 is increased, which can effectively prolong the vacuum retention time.

[0059] As described above, during the operation of the vacuum device, as the vacuum time of the vacuum device increases, as 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 to form a vacuum sealing state.

[0060] The above scheme set up in the present application breaks the conventional setting method of forming a high-sealing environment before vacuuming (the user applies external force to lock the door body and the shell through the locking device). The present invention only uses a locking structure with a small volume and small locking force to lock the door body and the shell to form a pre-sealed condition, and then uses the negative pressure generated by vacuuming to assist in forming a high-sealing condition to meet the vacuum sealing condition.

[0061] At the end of the vacuum device operation, the compressed length of the sealing element 4 is recorded as the vacuum compression distance L. 2 , at this time, the door is in a vacuum locked state. In some embodiments of the present application, the vacuum compression distance L 2 >Pre-lock compression distance L 1 , and the vacuum compression distance L 2 ≤ Maximum deformable distance L 0 . 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 the pre-locking state to the vacuum locking state.

[0062] In some embodiments of the present application, the pre-locking compression distance L 1 : Maximum deformable distance L 0 ∈[0.05, 0.1] Any value. Configurable, pre-lock compression distance L1 ∈(0,1] any value, unit: mm. When the door body 3 is closed, the door body 3 and the shell 2 squeeze the sealing element 4 to achieve a pre-locking position with a slight deformation. When the user pushes the drawer unit into the storage chamber 20, the door body 3 can be closed to a locked state without deliberately increasing the force, so that the storage chamber 20 reaches a pre-sealed state, providing initial sealing conditions for vacuuming.

[0063] 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 2, 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.

[0064] During the process of opening the door body 3, 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, which is convenient for users to take and put items.

[0065] 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, the door body 3 closes the storage opening 21, the locking structure locks the door body 3 in the pre-locking position, and the sealing element 4 is compressed by the pre-locking compression distance L 1 , the door body 3 is sealed and connected to the shell body 2.

[0066] 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 drives the storage container 14 to produce a slight displacement along the first moving direction through the guide rail device, and the sealing element 4 is further compressed. After the vacuum is completed, the length of the sealing element 4 compressed is the vacuum compression distance L. 2 , which is greater than the pre-locking compression distance L 1 The sealing performance of the door body 3 and the shell 2 is enhanced, and the sealing performance of the closed storage cavity formed by the door body 3 and the shell 2 is increased, which can effectively prolong the vacuum retention time.

[0067] 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. The outer rail 35 is fixedly connected to the inner wall of the housing 2, 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 provided above, and the extension shaft is movably connected to the outer rail 35 and the inner rail 33 at the same time, which effectively extends the extension stroke of the guide rail device.

[0068] During the process of opening the door body 3, 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 take and put items.

[0069] 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, the door body 3 closes the storage opening 21, the locking structure locks the door body 3 in the pre-locking position, and the sealing element 4 is compressed by the pre-locking compression distance L 1 , the door body 3 is sealed and connected to the shell body 2.

[0070] After the door body 3 is closed to the pre-locking position, the vacuum device is activated. 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 drives the storage container 14 to move from the pre-locking position along the second moving direction through the guide rail device, and the sealing element 4 is further compressed. After the vacuum is completed, the sealing element 4 is compressed by a distance greater than the pre-locking compression distance L 1 The sealing performance of the door body 3 and the shell 2 is enhanced, and the sealing performance of the closed storage cavity formed by the door body 3 and the shell 2 is increased, which can effectively prolong the vacuum retention time.

[0071] The above settings in this application are no different from the user's pushing operation when pushing the drawer unit in a conventional drawer-type non-low-pressure storage device. It is sufficient to push the drawer unit to the closed position of the door body 3 (the door body 3 cooperates with the sealing element 4) with external force, and no additional operation is required for locking. That is, the setting of this application locks the door body 3 and the shell 2 while the user pushes the drawer unit to close, and the compressed part of the sealing element 4 forms a pre-seal; no other additional special operations are required to form a sealing condition. Then, through the pre-locking of the locking structure and the increase in the air pressure difference when the vacuum device is working, the door body 3 and the shell 2 are further sealed and matched, the sealing is improved, and the vacuum degree is ensured.

[0072] In some embodiments of the present application, Figure 6 As shown, the locking structure on the guide rail device is set as a push-to-open locking structure. Take the initial state of the push-to-open locking structure as an example for explanation. Press the push-to-open locking structure once, and the push-to-open locking structure is converted from the unlocked state to the locked state; press the push-to-open locking structure again, and the push-to-open locking structure is converted from the locked state to the unlocked state. That is, by pressing the push-to-open locking structure once, the push-to-open locking structure is converted between the locked state and the unlocked state.

[0073] In some embodiments of the present application, a push-to-lock structure is used to pre-seal the low-pressure storage device, and the vacuum pump 32 is turned on to evacuate. After the vacuum is completed, 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.

[0074] In some embodiments of the present application, after the internal and external pressures of the storage chamber 20 are balanced by the ventilation unit (electronic ventilation unit or mechanical button-type ventilation unit), there is no internal and external pressure difference in the storage chamber 20; that is, the force of pressing the push-to-pop locking structure again is removed. At this time, the push-to-pop locking structure is unlocked and popped open, and the door body 3 automatically pops open under the push elastic force when the push-to-pop locking structure is unlocked, and the low-pressure storage device can be automatically opened.

[0075] In some embodiments of the present application, the sealing element 4 of the low-pressure storage device has a maximum deformable distance L 0 The push-to-lock structure has an unlocking stroke J 0 The maximum deformable distance L of the sealing element 4 0 Greater than the unlocking stroke J of the push-to-lock structure 0 (L 0 >J 0 ). In the early stage of closing the door body 3 of the low-pressure storage device, under the action of the push-to-lock structure, the door body 3 and the housing 2 squeeze the sealing element 4, so that the door body 3 is in the pre-locking position to form a pre-seal.

[0076] At this time, the sealing element 4 is compressed to a pre-locking compression distance L. 1After the vacuum pump 32 is evacuated, a negative pressure (adjustable, the pressure value is lower than 0.9atm) is formed in the low-pressure storage device. At this time, 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 distance L 2 At this time, the door body 3 acts on the push-to-pop locking structure, triggering the pop-opening action of the push-to-pop locking structure.

[0077] When the internal and external pressure difference of the low-pressure storage device is relieved (leakage or opening of the ventilation unit), the push-to-lock structure is unlocked. 2 -L 1 ≥J 0 , so that the push-to-lock structure is triggered to unlock 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 is unlocked, driving the door body to open automatically.

[0078] As a configurable manner, the sealing element 4 of the low-pressure storage device is compressed from the pre-sealing position to the maximum deformation distance L of the sealing element 4. 0 When the sealing element 4 is compressed, the distance L 0 -L 1 . Push-to-lock unlocking travel J 0 Among them, L 0 -L 1 ≥J 0 To ensure that the push-to-lock structure can be unlocked under external force. 0 -L 1 Any value between 2mm and 3mm, J 0 Any value between 1mm-2mm.

[0079] In some embodiments of the present application, after the internal and external pressure difference of the low-pressure storage device is released, the push-to-lock structure is still in a self-locking 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 distance L 2 At this time, the door body 3 acts on the push-to-pop locking structure, but it is not enough to trigger the push-to-pop locking structure to open. At this time, the vacuum compression distance L 2 <Maximum deformation distance L 0 ; L 2 -L 1 <J 0 , and L 0 -L 1 ≥J 0 . To ensure that the push-to-lock structure can be unlocked under the action of external force, and to keep the push-to-lock structure in a locked state when the internal and external pressure difference of the low-pressure storage device is released.

[0080] In some embodiments of the present application, the internal pressure value of the low-pressure storage device is P 1 (e.g. 0.7-0.9atm), the pressure value outside the door 3 of the low-pressure storage device is P 0 (For example, 1 atm). The area of ​​the door body 3 is S, and the force of the push-to-open locking structure is F. 1 , F 1 <(P 0 -P 1 )*S. The above arrangement enables the low-pressure storage device to automatically pop open after the ventilation unit is opened.

[0081] In some embodiments of the present application, Figure 7-Figure 8 As shown, the locking structure on the guide rail device is set as a locking structure with double self-locking function. When the door body 3 is closed, the inner rail 33 moves in the closing direction, and after moving a first distance, the inner rail 33 and the outer rail 35 complete the first level of locking. After the first level of locking, the inner rail 33 continues to move a second distance in the closing direction, and the inner rail 33 and the outer rail 35 complete the second level of locking. The locking structure of the guide rail device with 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.

[0082] In some embodiments of the present application, when the inner rail 33 and the outer rail 35 complete the first-level locking, the door body 3 reaches the pre-locking position. When the door body 3 reaches the second-level locking, the storage chamber 20 is evacuated and the door body 3 is in a vacuum locking state. At this time, the door body 3 of the low-pressure storage device is affected by the second-level locking on the one hand, and the pressure difference between the inside and the outside is affected, which effectively ensures the sealing of the door body 3 and the shell 2, reduces the amount of air leakage, and prolongs the pressure holding time.

[0083] As a configurable manner, a first locking portion is provided on the inner rail 33 and a second locking portion is provided on the outer rail 35; when the door body 3 is closed and moves a first distance, the first locking portion cooperates with the second locking portion to complete the first level of locking.

[0084] Then, a certain external force is applied to the inner rail 33, or under the action of the inertia force of the inner rail 33, or under the action of the elastic tension triggered by the first-level locking action, the inner rail 33 continues to move a second distance in the closing direction, and the inner rail 33 and the outer rail 35 complete the second-level locking.

[0085] In some embodiments of the present application, Figure 7-Figure 8As shown, the second locking portion is arranged on the first connecting member, and the first connecting member is rotatably connected to the outer rail 35. A torsion spring is arranged between the first connecting member and the end of the outer rail 35 away from the storage port 21. When the first locking portion and the second locking portion cooperate to complete the first-level locking, the first locking portion on the inner rail 33 compresses the torsion spring arranged at one end of the outer rail 35 close to the rear wall of the shell 2 through the first connecting member, so that the torsion spring is compressed in the radial direction. When the first locking portion and the second locking portion are locked to complete the first-level locking, the torsion spring reaches the critical value of the torsion spring. After that, the torsion spring begins to stretch, and the torsion spring drives the inner rail 33 to continue to move a second distance in the closing direction through the first connecting member to complete the second-level locking. The above arrangement enables the door body 3 to automatically complete the second-level locking after the first-level locking is completed after closing.

[0086] 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.

[0087] In some embodiments of the present application, Fig. 9 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.

[0088] The first-level locking arrangement of the locking structure with the double self-locking function is the same as above. The inner rail 33 is provided with a first locking portion, and the outer rail 35 is provided with a second locking portion. When the door body 3 is closed, under the push of an external force, after the door body 3 moves a first distance, the first locking portion cooperates with the second locking portion to complete the locking.

[0089] As a configurable manner, the first locking portion is provided with a buckle, and the second locking portion is provided with a slot. When the first locking portion and the second locking portion cooperate, the first locking portion undergoes elastic deformation and enters the slot, and then the first locking portion has at least a recovery portion to complete locking with the second locking portion.

[0090] In some embodiments of the present application, a pressure monitoring unit is provided in the low-pressure storage device to monitor the pressure state in the storage chamber 20 in real time.

[0091] When the vacuum device is working, the pressure monitoring unit monitors the pressure in the storage chamber 20. When the pressure in the storage chamber 20 reaches a first pressure value, the vacuum device stops working.

[0092] 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 to reduce the pressure in the storage chamber 20.

[0093] 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.

[0094] In some embodiments of the present application, Figure 10-11 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. Among them, 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 the door 11 at different angles. 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.

[0095] 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 parallel to the flip axis M, and the free end 50 rotates around the flip axis M. The flip beam 5 is located in an area of ​​the door body 3 of the low-pressure storage device away from the housing 2; that is, the flip beam 5 is located in the front area of ​​the door body 3 of the low-pressure storage device.

[0096] 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.

[0097] In some embodiments of the present application, when the box door 11 is closed, on the projection of the plane where the access 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 of the low-pressure storage device 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.

[0098] When the box door 11 is closed, 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.

[0099] 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.

[0100] In some embodiments of the present application, when 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.

[0101] In some embodiments of the present application, when the door body 3 is in the process of being opened and the door body 3 reaching the pre-locked position, the box door 11 with the flip beam 5 pushes the door body 3 to move along the second direction during the closing process. Under the above settings, in the direction perpendicular to the plane where the access opening 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-locked position, the distance between the front end of the door body 3 and the plane where the access opening 13 is located is recorded as D; D≤W. The plane where the access opening 13 is located is the plane where the matching surface of the box door 11 and the box body 10 is located when the box door 11 is closed.

[0102] It should be noted that, during the closing process of the door 11, the flip beam 5 can be flipped smoothly under the force of the door closing. That is, during the closing process of the door 11, W<D+(L 0 -L 1 ). When the door 11 is closed, the distance by which the free end 50 of the flip beam 5 enters the storage room and compresses 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 flip into place during the closing process of the door 11, 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.

[0103] In some embodiments of the present application, when the door body 3 moves along the second direction to the first position under the action of an external driving force, the external driving force is removed, and the door body 3 continues to move along the second direction under the action of inertia and reaches the pre-locking position, thereby completing the locking of the door body 3 and the shell 2.

[0104] 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 opening 13 is located is recorded as D 1 , where D 1 <D. As above, in the direction perpendicular to the plane where the access opening 13 is located, during the turning process of the turning beam 5, the maximum displacement of the free end 50 entering the storage room is recorded as W; where D 1=W. In the process from the door body 3 being opened to the door body 3 reaching the first position, the box door 11 with the flip beam 5 pushes the door body 3 to move along the second direction during the closing 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, the displacement of the free end 50 of the flip beam 5 entering the storage room decreases, and the door body 3 continues to move along the second moving direction under the action of the inertia force and reaches the pre-locking position.

[0105] In some embodiments of the present application, D 1 ≤W,D 1 ≤W≤D. That is, in this embodiment, when the door body 3 is in the open state, the box door 11 with the flip beam 5 pushes the door body 3 to move along the second moving direction during the closing process; 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 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, and the door body 3 continues to move along the second moving direction under the action of inertia force and reaches the pre-locking position.

[0106] The present invention defines the relative position of the flip beam 5 and the door body 3 of the low-pressure storage device, 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 to the pre-locking position 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, thereby causing the pre-seal to fail, resulting in ineffective air extraction by the vacuum device (vacuum pump 32), thereby effectively reducing noise and power consumption.

[0107] At present, during the vacuuming process of the fresh-keeping drawer, the power or speed of the vacuum pump 32 is usually reduced to match the working mode of the refrigerator to avoid resonance, thereby reducing the noise of the vacuuming operation, making the noise of the vacuum pump 32 easily acceptable to users. The above solution of the present application uses pressure difference to achieve the initial state to form a low-pressure environment in the drawer unit, and its vacuuming working state in the initial state is inconsistent with the conventional vacuuming working state.

[0108] In some embodiments of the present application, as the vacuum is drawn, the door body 3 and the housing 2 act to compress the sealing element 4 to a vacuum sealing distance L. 3 The vacuum sealing condition is achieved.

[0109] In some embodiments of the present application, a position sensor is provided to determine by detection whether the door body 3 has reached the vacuum sealing distance L when the sealing element 4 is compressed. 3 Wait for the door body 3 and the shell 2 to work together to compress the sealing element 4 to the vacuum sealing distance L 3 When , the position sensor is triggered, and the vacuum pump 32 ends the first state and operates in the second state.

[0110] In some embodiments of the present application, it can be arranged that the door body 3 and the housing 2 act to compress the sealing element 4 to a vacuum sealing distance L. 3 The time required for the door 3 and the housing 2 to compress the sealing element 4 to the vacuum sealing distance L 3 At least one of the corresponding air pressure in the low-pressure storage device, the air pressure change rate, the current of the vacuum pump 32, the exhaust flow rate of the vacuum pump 32, etc. is used as a judgment condition for the vacuum pump 32 to end the first state operation and start the second state operation.

[0111] The door body 3 and the housing 2 act to compress the sealing element 4 to a vacuum sealing distance L. 3 When the corresponding air pressure in the low-pressure storage device drops to a set value, it indicates that the difference between the external environment air pressure and the air pressure in the low-pressure storage device reaches a value that allows the door body 3 and the shell 2 to squeeze the sealing element 4 to achieve a vacuum sealing condition.

[0112] 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.

[0113] In some embodiments of the present application, when the door body 3 is closed to the pre-locking position, the vacuum pump 32 works in the first state; the air pressure in the low-pressure storage device decreases, the door body 3 moves along the second displacement direction, and the door body 3 and the shell 2 act to compress the sealing element 4 to the vacuum sealing distance L 3 When the vacuum pump 32 starts to work in the second state, the vacuum pump 32 starts to work in the second state. The vacuum pump 32 has a larger suction volume (discharge volume) when working in the first state than the suction volume (discharge volume) when working in the second state, so as to quickly form a vacuum sealing condition.

[0114] In some embodiments of the present application, the first state is set to a first speed V 1 , the second state is set to the second speed V 2 Among them, the second speed V 2 Less than the first speed V 1 The rated speed of the vacuum pump 32 is denoted as V 0 Among them, V 1 Belongs to 0.8V 0 ~V 0 For any value, V 2 Belongs to 0.5V 0 ~0.8V 0 Any of these values.

[0115] In some embodiments of the present application, the first state is set to a first power P 1 , the second state is set to the second power P 2 ; Wherein, the second power P2 Less than the first power P 1 The rated power of the vacuum pump 32 can be set as P 0 Among them, P 1 Belongs to 0.8P 0 ~P 0 Any value of P 2 Belongs to 0.5P 0 ~0.8P 0 Any of these values.

[0116] As described above, in the embodiment of the present application, when evacuating, the vacuum pump 32 first operates in the first state to quickly evacuate air, so as to ensure that the evacuation volume of the vacuum pump 32 is greater than the intake volume of air from the external environment into the storage chamber 20, and quickly create a vacuum sealing condition. When the vacuum sealing condition is achieved, the vacuum pump 32 then operates in the second state that is lower than the first working state, reduces the evacuation rate, reduces the noise of the vacuum operation, and controls the vacuum noise within an acceptable range.

[0117] In some embodiments of the present application, Figure 2 As shown, a cover plate assembly is provided on the upper part of the shell 2 of the low-pressure storage device, and the cover plate assembly is connected to the shell 2; and one or more operation buttons are provided on the cover plate.

[0118] 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.

[0119] As another configurable manner, the operation button is used to control the on / off state of the ventilation unit to control the connection and disconnection between the storage chamber 20 and the outside.

[0120] In some embodiments of the present application, Fig.12 As shown, a gas-controlled membrane assembly and a ventilation unit are provided in the storage chamber 20. The ventilation unit is an electronic ventilation unit 31, and the opening or closing state of the electronic ventilation unit 31 is controlled by a controller to connect or disconnect the storage chamber 20 with the external environment. The gas-controlled membrane assembly has a nitrogen-oxygen separation membrane 36, and the gas-controlled membrane (nitrogen-oxygen separation membrane 36) has oxygen-affinity groups. Compared with nitrogen, carbon dioxide, etc., oxygen is more likely to adhere to oxygen-affinity groups; that is, a large amount of oxygen is attached to the nitrogen-oxygen separation membrane 36.

[0121] 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. When the vacuum pump 32 exhausts air for a preset exhaust 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.

[0122] In the above process, when the ventilation unit is turned on and the vacuum pump 32 is working, a large amount of oxygen in the storage chamber 20 is attached to the gas-controlled membrane assembly; that is, the oxygen concentration on the gas-controlled membrane assembly is higher (greater than the oxygen content in the air). At this time, the vacuum pump 32 is working, and there is a pressure difference on the nitrogen-oxygen separation membrane 36. The gas extracted by the vacuum pump 32 at this time has a higher content than when there is no gas-controlled membrane assembly. The oxygen content in the gas extracted by the vacuum pump 32 is recorded as the oxygen-rich concentration C 1 The oxygen content in the air is C 0 Among them, C 1 >C 0 That is, the oxygen concentration in the gas entering the storage chamber 20 from the outside is C 0 The oxygen content in the gas extracted from the storage chamber 20 by the vacuum pump 32 is lower than that in the storage chamber 20 .

[0123] It should be noted that, as a configurable method, the oxygen concentration mentioned above is the molecular weight of oxygen in a unit space.

[0124] A large amount of oxygen in the air entering the storage chamber 20 from the outside adheres to the nitrogen-oxygen separation membrane 36. 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 and pump air, the oxygen concentration in the storage chamber 20 increases from C 0 Reduce to C 2 , the oxygen concentration reaches a balanced state, and the oxygen content cannot decrease even if the air is pumped continuously; a hypoxic environment is formed at this time.

[0125] In some embodiments of the present application, nitrogen and oxygen are first separated from the gas in the storage chamber 20, so that the storage chamber 20 is in a state of oxygen reduction at normal pressure. 0 Reduce to C 2 After that, the low-pressure storage device is sealed and then evacuated. 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 C 3 , forming a low-oxygen and low-pressure environment, which can achieve a better preservation effect. 3 <C 2 <C 0 .

[0126] In some embodiments of the present application, the modified atmosphere membrane assembly is disposed near a vacuum port connecting the vacuum pump 32 and the storage chamber 20 to quickly form a pressure difference on both sides of the nitrogen-oxygen separation membrane 36 to extract oxygen from the storage chamber 20 .

[0127] In some embodiments of the present application, an opening 28 is formed on the housing 2, and a nitrogen-oxygen separation membrane 36 and an adapter plate 7 are provided at the opening 28. The adapter plate 7 is located on a side of the nitrogen-oxygen separation membrane 36 away from the storage chamber 20. The exhaust end of the exhaust pipeline of the exhaust device is located between the nitrogen-oxygen separation membrane 36 and the adapter plate 7, so as to extract the oxygen attached to the nitrogen-oxygen separation membrane 36 in a targeted manner.

[0128] In the above embodiments, when the vacuum pump 32 is working, the ventilation unit is first opened for a period of time (preset vacuuming time) to perform oxygen reduction at normal pressure; a low oxygen environment is formed after the vacuum pump 32 has worked for a period of time; then the vacuum pump 32 is kept working and the ventilation unit is closed to complete the vacuuming and preservation of the low-pressure storage device, forming 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 depressurization, so as to effectively extend the preservation time.

[0129] Under the setting of the low oxygen and low pressure storage environment formed above, when the pressure value in the storage chamber 20 reaches the second pressure value due to slow gas leakage, the exhaust device is started to reduce the pressure in the storage chamber 20. At this time, only a simple vacuuming and pressure reduction operation is performed, and no oxygen reduction operation is performed.

[0130] When the door 3 of the low-pressure storage device is opened and then closed, the vacuum pump 32 operates to first open the ventilation unit to reduce oxygen, and then close the ventilation unit to reduce pressure and evacuate the air, so as to form a low-oxygen and low-pressure storage environment.

[0131] In some embodiments of the present application, at least one storage mode is set on the refrigerator operation interface for the user to select, and the at least one storage mode includes a normal pressure low oxygen mode, a low pressure mode, and a low oxygen low pressure mode. As described above, the storage chamber 20 is provided with a modified atmosphere membrane assembly.

[0132] When the normal pressure hypoxia mode is selected, the ventilation unit is opened, the storage chamber 20 is connected to the outside, and the vacuum pump 32 works to reduce the oxygen content in the storage chamber 20 to form a hypoxic storage environment.

[0133] When the low-pressure mode is selected, the ventilation unit is closed, the storage chamber 20 is disconnected from the external environment, the vacuum pump 32 is operated, and the air pressure in the low-pressure storage unit is reduced to form a low-pressure storage environment.

[0134] When the low oxygen and low pressure mode is selected, the door body 3 is closed, the ventilation unit is opened, and the storage chamber 20 is connected to the external environment. When the vacuum pump 32 exhausts air for a preset exhaust 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.

[0135] The above different 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.

[0136] For example, for fruits and vegetables, especially those with large transpiration area (leafy vegetables, such as spinach) and relatively high humidity (fruits, such as cherries, mulberries, etc.), under low pressure, due to the large evaporation area, fruits and vegetables are prone to transpiration loss and cannot achieve the ideal preservation effect. In order to reduce transpiration loss, it is suitable for normal pressure and low oxygen mode to reduce its respiration, preserve nutrients, reduce transpiration loss, and improve freshness.

[0137] For dry food (such as dried fruit, tea, grains), there is no problem of volatile water. Oxygen concentration can usually only be reduced to C at room temperature to preserve freshness. 2 , it cannot be further reduced and is prone to spoilage. It is suitable for low oxygen and low pressure mode. It is stored in a low oxygen and low pressure environment to reduce its respiration, preserve nutrients and extend the shelf life.

[0138] For foods with normal humidity (such as potatoes, sweet potatoes and other root foods), their transpiration water loss is normal and they can be stored in low-pressure mode.

[0139] In some embodiments of the present application, a food identification device is provided on the refrigerator, and food is selected and placed into the low-pressure storage device through a user operation interface.

[0140] In some embodiments of the present application, the food identification device is disposed on the cabinet door 11 .

[0141] In some embodiments of the present application, RFID technology is used, and a label storing information about the food is provided on the food; the food identification device identifies the label to obtain the information in the label on the food. According to the type of food stored in the low-pressure storage device, the applicable storage mode is automatically determined, such as normal pressure and low oxygen mode, low pressure mode, and low oxygen and low pressure mode.

[0142] The food identification device may be provided with a scanning device to obtain information in the label on the food when scanning the food. The food information stored in the label may include information such as the name of the food, the type (such as high humidity, dryness, average humidity, etc.), and the quantity (such as weight, quantity).

[0143] In some embodiments of the present application, when mixed ingredients are placed, the storage mode is selected by judging the type and quantity of the ingredients. For example, when the number of leafy vegetables is larger, the normal pressure and low oxygen mode is selected for preservation; when the number of root vegetables is larger, the low pressure preservation mode is selected; and when the number of dry ingredients is larger, the low oxygen and low pressure mode is selected.

[0144] In some embodiments of the present application, the refrigerator is provided with an operation button for selecting a vacuum pickling mode.

[0145] In some embodiments of the present application, when the vacuum pickling mode is selected, the door 3 is closed and the vacuum pump 32 is operated to make the pressure in the storage chamber 20 reach a first pressure value and maintain the current first pressure value for a first time period. Under the above low-pressure environment, the intracellular pressure of the food with seasoning is greater than the pressure of the storage chamber 20 in which it is located.

[0146] When the pressure in the storage chamber 20 maintains the current first pressure value for a first time period, the ventilation unit is opened, the storage chamber 20 is connected to the outside, the pressure in the storage chamber 20 reaches a second pressure value, the ventilation unit is closed, and the second pressure value is maintained for a second time period. Under the above second pressure value, compared with the first pressure value, the difference between the intracellular pressure of the food with seasoning and the pressure of the storage chamber 20 in which it is located becomes smaller. Among them, the second pressure value> the first pressure value.

[0147] When the second pressure value is maintained in the storage chamber 20 for a second time period, the ventilation unit is in a closed state, the storage chamber 20 is disconnected from the outside, and the vacuum pump 32 works to make the pressure in the storage chamber 20 reach the first pressure value; and when the pressure in the storage chamber 20 maintains the current first pressure value for a first time period, the ventilation unit is opened again. The first pressure value is maintained for a first time period, and the second pressure value is maintained for a first normal pressure time period in a cycle, so that the food placed in the storage chamber 20 is pickled.

[0148] As described above, in the environment of the first pressure value, the pressure difference between the intracellular pressure and the storage chamber 20 in which the cell is located becomes larger, while in the environment of the second pressure value, the pressure difference between the intracellular pressure and the storage chamber 20 in which the cell is located becomes smaller. In this way, the pressure changes between the two pressure differences, thereby accelerating the rupture rate of the cell wall, thereby accelerating the entry of external substances (seasonings) into the cell and increasing the speed of flavor absorption.

[0149] As a configurable manner, the first pressure value is set to any value between 0.7 atm and 0.8 atm, and the second pressure value is set to any value between 0.9 atm and 1 atm.

[0150] As a configurable method, after the electronic ventilation unit 31 is ventilated, the air pressure in the low-pressure storage unit increases; when the second pressure value is 1atm normal pressure, the ventilation unit remains in an open state; when the second pressure value is maintained in the storage chamber 20 for a second period of time, the ventilation unit is opened again and the vacuum pump 32 works.

[0151] As a configurable manner, 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 second pressure value is greater than the first pressure value and less than the normal pressure. The second pressure value can be set to 0.9atm.

[0152] The second pressure value can be set to be the value of vacuuming that can be detected by the pressure monitoring unit during normal vacuuming. The above setting ensures that there is a pressure difference between the low-pressure storage unit and the external air pressure, so that the door 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.

[0153] In some embodiments of the present application, the refrigerator is provided with an operation button for selecting a vacuum fermentation mode.

[0154] In some embodiments of the present application, when the vacuum fermentation mode is selected, a 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.

[0155] In some embodiments of the present application, a modified atmosphere membrane assembly is provided in the storage chamber 20. When the vacuum fermentation mode is selected, oxygen reduction is first performed at normal pressure. Specifically, the ventilation unit is opened, the storage chamber 20 is connected to the outside, and the vacuum pump 32 is turned off when the preset oxygen reduction time is reached to reduce the oxygen content in the storage chamber 20, thereby forming a low oxygen storage environment (the oxygen content in the storage chamber 20 is reduced to C 2 ). The specific oxygen reduction process and settings are the same as the above-mentioned normal pressure oxygen reduction, which will not be repeated here. The oxygen reduction duration can be set to any value between 30 minutes and 60 minutes.

[0156] When the vacuum pump 32 works for the preset oxygen reduction time, the ventilation unit is closed, the storage chamber 20 is disconnected from the outside, the vacuum pump 32 keeps working, and the vacuum pump stops working when the pressure in the storage chamber 20 drops to the first pressure value. At this time, the pressure in the storage chamber 20 drops, and the oxygen concentration further decreases; the oxygen concentration is C 2 Reduce to C 3 (C 3 <C 2 ). The first pressure value can be set to 0.6atm to form a low-pressure and low-oxygen environment.

[0157] In some embodiments of the present application, when the pressure value in the storage chamber 20 reaches the second pressure value due to the slow leakage, the oxygen content of the gas entering the storage chamber 20 due to the leakage is C 0 , the oxygen content in the storage chamber 20 increases to C 2The oxygen content at this time is the oxygen content after atmospheric pressure oxygen reduction, and atmospheric pressure oxygen reduction is not 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 at the same time.

[0158] The second pressure value can be set to 0.9 atm. During 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 C 0 .

[0159] In some embodiments of the present application, when the pressure value in the storage chamber 20 reaches the second pressure value due to the slow leakage, the oxygen content of the gas entering the storage chamber 20 due to the leakage is C 0 , the oxygen content in the storage chamber 20 increases. At this time, the ventilation unit is opened, and the vacuum pump 32 is started to perform normal pressure oxygen first; when the vacuum pump 32 working time reaches the oxygen reduction time, the ventilation unit is closed, and the vacuum pump 32 keeps working 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 at the same time.

[0160] In some embodiments of the present application, when the vacuum fermentation mode is started, the low-pressure storage device does not perform refrigeration, so that the fermentation is performed in a relatively high temperature and low-oxygen environment, thereby improving the fermentation efficiency.

[0161] 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 heating device works, the temperature in the storage chamber 20 rises, and the anaerobic respiration efficiency of anaerobic bacteria is increased in a low-oxygen environment.

[0162] like Figure 13-Figure 19 As shown, the setting of the power supply device of the low-voltage storage device.

[0163] Specifically, the wires that energize the current power supply device are directly installed in the wire fixing part. The setting of the wire fixing part causes the low sealing of the low-pressure storage device, which makes it easy for external gas to enter the low-pressure storage device through the wire fixing part, resulting in the low-pressure state of the low-pressure storage device cannot be maintained for a long time. The low-pressure storage device is a sealed environment, which is easy for bacteria to breed. In order to maintain the cleanliness of the low-pressure storage device, it is necessary to sterilize its internal environment. In addition, the low-pressure storage device is a sealed environment. When placing smelly food, the smell cannot dissipate, resulting in a high concentration of odor, and it needs to be deodorized to form a clean and odorless storage space.

[0164] In some embodiments of the present application, 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 storage container 14 is pushed into the storage chamber 20, the door body 3 closes the storage opening 21. 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.

[0165] The refrigerator is provided with a low-pressure storage device which can be maintained in a low-pressure state and an exhaust device which is used for extracting gas from the low-pressure storage device so as to form a low-pressure state in the inner cavity of the low-pressure storage device.

[0166] In some embodiments of the present application, the gas extraction device includes a vacuum pump 32 and a pipeline connected between the vacuum pump 32 and the low-pressure storage device. When the gas extraction 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 to below the standard atmospheric pressure, forming a vacuum storage environment.

[0167] In some embodiments of the present application, Figure 13-Figure 16 As shown, the power supply device includes a conductive column 6 and a sealing member 64; the conductive column 6 includes a first conductive portion 61 and a second conductive portion 62. The first conductive portion 61 extends into the storage chamber 20, and the second conductive portion 62 is located outside the housing 2 and connected to a power source to supply power to the conductive column 6.

[0168] The sealing member 64 is disposed at the joint between the conductive pillar 6 and the housing 2 to seal the conductive pillar 6 and the housing 2. The side of the sealing member 64 close to the housing 2 is in communication with the storage chamber 20.

[0169] In some embodiments of the present application, the vacuum pump 32 is working and the pressure in the storage chamber 20 is reduced. Since the side of the seal 64 close to the shell 2 is connected to the storage chamber 20, the pressure on the side of the seal 64 close to the shell 2 is less than the external pressure on the side away from the shell 2. The seal 64 is further moved closer to the shell 2 by the pressure difference between the side away from the shell 2 and the side close to the storage chamber 20, thereby further sealing the connection between the conductive column 6 and the shell 2 to effectively ensure the sealing.

[0170] In addition, when the vacuum is drawn, the seal 64 is further moved closer to the housing 2 by the pressure difference between the side of the seal 64 away from the housing 2 and the side of the seal 64 close to the storage chamber 20, and further seals the connection between the conductive column 6 and the housing 2. At the same time, under the pressure difference between the side of the seal 64 away from the housing 2 and the side of the seal 64 close to the storage chamber 20, the seal 64 shrinks at the mounting hole through which the conductive column 6 passes, further increasing the sealing fit between the seal 64 and the conductive column 6, and effectively enhancing the sealing of the connection between the conductive column 6, the seal 64 and the housing 2.

[0171] Specifically, the housing 2 is provided with a first mounting hole 26 and a second mounting hole 27; the first mounting hole 26 and the second mounting hole 27 are both provided with a conductive column 6. The conductive column 6 installed in the first mounting hole 26 is connected to the positive electrode of the power supply, and the conductive column 6 installed in the second mounting hole 27 is connected to the negative electrode of the power supply.

[0172] The conductive column 6 includes a fixing plate 63, and the first conductive portion 61 and the second conductive portion 62 of the conductive column 6 are located on opposite sides of the fixing plate 63. The sealing member 64 is located between the fixing plate 63 and the housing 2, and the sealing member 64 is sealed and sleeved on the first conductive portion 61, so that the conductive column 6 and the housing 2 are sealed.

[0173] A pressure cap 65 is installed on the side of the fixed plate 63 away from the shell 2. The pressure cap 65 includes a pressure plate and a connecting plate for fixed connection with the shell 2. The pressure plate is mounted on the second conductive part 62 and matched with the fixed plate 63 of the conductive column 6. The connecting plate of the pressure cap 65 is located at the periphery of the pressure plate away from the second conductive part 62 and is fixedly connected to the shell 2. After the connecting plate of the pressure cap 65 is fixedly connected to the shell 2, the distance between the pressure plate and the shell 2 is less than the sum of the thickness of the fixed plate 63 and the sealing element 4 in the natural state. That is, the pressure cap 65 is fixedly connected to the shell 2, and its pressure plate presses against the fixed plate 63, and squeezes the sealing member 64 through the fixed plate 63 and the shell 2, so that the sealing member 64 is sealed and connected with the fixed plate 63 and the shell 2, providing a pre-tightening force on the sealing member 64 to form a pre-seal, improve the reliability of the seal, and reduce the possibility of air leakage during vacuuming. The seal 64 is further sealed with the pressure difference between the two relative pressures during vacuuming to ensure efficient sealing.

[0174] As a configurable manner, the fixing plate 63 on the conductive column 6 is planar, and the pressing plate of the pressure cover 65 is planar; the fixing plate 63 is in contact with the pressing plate plane, which increases the interaction area and ensures the sealing effect of the pre-seal.

[0175] As a configurable manner, the connecting plate is fixedly connected to the housing 2 by means of screws.

[0176] As a configurable method, screw columns are arranged around the first mounting hole 26 or the second mounting hole 27 on the shell 2, and screw holes are arranged on the connecting plate on the pressure cover 65. The screws pass through the screw holes on the connecting plate and cooperate with the screw columns on the shell 2 to fix the pressure cover 65 to the shell 2.

[0177] In some embodiments of the present application, a housing 200 is formed on the housing 2, surrounding the first mounting hole 26 and the second mounting hole 27. A shield 66 is installed on the side of the housing 200 away from the inner cavity of the storage chamber 20. The shield 66 cooperates with the end of the housing 200 away from the inner cavity of the storage chamber 20 to form an accommodating cavity, so as to protect the power-carrying device and prevent the power-carrying device from being damaged by moisture in the storage room.

[0178] In some embodiments of the present application, a sealing strip 67 is provided at the matching position of the shield 66 and the accommodating portion 200, so that the shield 66 and the accommodating portion 200 are sealed and matched to form a sealed accommodating space, further reducing the impact of the environment in the storage room on the powered device.

[0179] The sealing arrangement of the above-mentioned power-on device utilizes the negative pressure effect of vacuum extraction to effectively ensure the sealing performance of the power-on device and the housing 2, and the sealing performance is not damaged by the installation of the power-on module.

[0180] In some embodiments of the present application, the first conductive portions 61 of the two conductive pillars 6 are connected to lighting devices to illuminate the low-voltage storage device.

[0181] In some embodiments of the present application, an opening 28 is provided on the housing 2, and the opening 28 is connected to the inside and outside of the housing 2. An adapter plate 7 is provided at the opening 28. The power-on device is installed on the adapter plate 7. The above arrangement enables the power-on device to be detachably connected to the housing 2, which is convenient for testing the power-on device and also for installing the power-on module. After the low-voltage storage device is powered on, a functional module (such as the ion generation module described later) is often installed. If there is no adapter plate 7, the function is difficult to install and test.

[0182] In some embodiments of the present application, the adapter plate 7 is sealed and connected to the housing 2 via a sealing ring.

[0183] In some embodiments of the present application, Figure 13-Figure 16 ,like Figure 16-Figure 19 As shown, an ion generating module is provided in the storage chamber 20. The ion generating module includes a first circuit board 90 and a discharge module 91. The first circuit board 90 is connected to two first conductive parts 61 of the power supply device located inside the storage chamber 20 to energize the discharge module 91, and discharges when energized to sterilize and deodorize the storage chamber 20.

[0184] Among them, the discharge module 91 has a first discharge mode and a second discharge mode. The first discharge mode of the discharge module 91 is mainly corona discharge, which produces a large amount of strong oxidizing active substances, including ozone, atomic oxygen, ground state oxygen, etc., mainly for deodorization and supplemented by sterilization. The second discharge mode is air discharge (sterilization), which mainly produces positive and negative ion groups for sterilization. That is, when the purpose is sterilization, the discharge module 91 discharges in the second discharge mode; when the purpose is to remove odor, the discharge module 91 discharges in the first discharge mode.

[0185] In some embodiments of the present application, a receiving portion 70 is formed on one side of the adapter plate 7 close to the storage chamber 20; the receiving portion 70 is annular and surrounds the first circuit board 90 and the first mounting hole 26 and the second mounting hole 27. A protective cover 16 is installed at one end of the receiving portion 70 away from the storage port 21. The protective cover 16 cooperates with the receiving portion 70 to jointly define a receiving cavity to protect the power-on device and the first circuit board 90 and prevent moisture in the storage chamber 20 from damaging the power-on device and the first circuit board 90. The discharge module 91 is separately arranged from the first circuit board 90 to prevent the ions released by the discharge module 91 from corroding the first circuit board 90, ensuring that the discharge module 91 can effectively discharge while protecting the first circuit board 90.

[0186] In some embodiments of the present application, a sealing strip 67 is provided at the joint of the protective cover 16 and the receiving portion 200 to seal the protective cover 16 and the receiving portion 70 to form a sealed receiving space, thereby further reducing the impact of the environment in the storage chamber 20 on the power supply device and the first circuit board 90.

[0187] The above-mentioned accommodation portion 70 is arranged, on the one hand, to increase the sealing performance, reduce the possibility of air leakage caused by the installation of the power-on device, and does not destroy the sealing performance due to the installation of the power-on module; on the other hand, the power-on device and the first circuit board 90 are separated from the space in the storage chamber 20 and protected in the accommodation portion 70, so as to avoid the influence of the environment in the storage chamber 20 on the power-on device and the first circuit board 90, thereby avoiding damage to the power-on device and the first circuit board 90.

[0188] In some embodiments of the present application, Fig.16 As shown, the gas-controlled membrane assembly is arranged on the adapter plate 7 and is located adjacent to the ion generating module. It can be arranged that a storage portion is formed on the adapter plate 7 at a position adjacent to the ion generating module, and a nitrogen-oxygen separation membrane 36 is arranged in the storage portion to absorb oxygen in the storage chamber 20 for extraction by the exhaust device, thereby reducing the oxygen concentration in the storage chamber 20.

[0189] In some embodiments of the present application, when the vacuum pump 32 is working, the discharge module 91 does not work. This is to prevent the ions generated by the discharge module 91 from being extracted by the vacuum pump 32, thereby reducing the sterilization and deodorization effects. When the vacuum pump 32 is working, in one case it is in a normal pressure oxygen reduction mode, the oxygen content is reduced, and the gas in the storage chamber 20 is in a circulating flow state. At this time, the discharge module 91 does not work, avoiding ineffective sterilization and reducing power consumption. In another case, it is in an oxygen reduction mode, the door body 3 is closed, the ventilation unit is closed, the vacuum pump 32 is working, and the pressure in the storage chamber 20 is reduced. At this time, the gas in the storage chamber 20 is in a state of being extracted outward, and the discharge module 91 does not work, avoiding ineffective sterilization and reducing power consumption.

[0190] In some embodiments of the present application, when the low-pressure storage device is opened and then closed, the ventilation unit is closed, the discharge module 91 is started, and continues to work for the first discharge duration. When the above discharge module 91 is working, the ventilation unit is closed, the storage chamber 20 is disconnected from the outside, and the discharge module 91 discharges the sealed storage chamber 20 to sterilize the gas therein.

[0191] After the discharge module 91 works for the first discharge time, it stops working. At this time, the ventilation unit is kept closed, the vacuum pump 32 is started, and the pressure in the storage chamber 20 is reduced to form a low-pressure environment.

[0192] When the pressure value in the storage chamber 20 reaches the second pressure value due to the slow air leakage, the vacuum pump 32 operates to reduce the pressure in the storage chamber 20 to the first pressure value.

[0193] When the pressure in the storage chamber 20 is reduced to the first pressure value, the vacuum pump 32 stops working to complete the pressure reduction. The discharge module 91 starts and continues to work for a second discharge time, wherein the second discharge time is shorter than the first discharge time.

[0194] When the door body 3 is opened and then closed, because the air carrying floating bacteria from the outside enters the storage chamber 20 when the door body 3 is opened, or new food is placed in the storage chamber 20 when the door body 3 is opened, the action of opening the door body 3 has a greater impact on the air composition in the storage chamber 20, and the discharge module 91 continues to discharge for a longer first discharge time (first discharge time) than the second discharge time, so as to perform a strong sterilization on the closed storage chamber 20.

[0195] When the door body 3 is kept closed, if the air pressure in the storage chamber 20 rises due to air leakage, after vacuuming and depressurization, the air composition in the storage chamber 20 changes little compared to when the door body 3 is opened. In this case, the discharge module 91 continues to discharge for a second discharge duration that is shorter than the first discharge duration to achieve the purpose of sterilization. In different cases, the discharge module 91 discharges for different durations of sterilization, so as to select a suitable discharge duration in a targeted manner, avoid unnecessary discharge, and reduce power consumption.

[0196] In some embodiments of the present application, when the low-pressure storage device keeps the door 3 closed for a first closing time period, the discharge module 91 is started and continues to work for a first discharge time period to strongly sterilize the storage chamber 20 .

[0197] In the above, the first closing time is greater than 2 days; the low-pressure storage device remains closed for a long time, and the long-term closed environment (plus the respiration and transpiration of the food) leads to bacterial growth. At this time, the discharge module 91 continues to work for a longer period of time to sterilize, which can more effectively sterilize the current storage environment.

[0198] In some embodiments of the present application, when the low-pressure storage device keeps the door body 3 closed for a first closing time, the vacuum pump 32 is activated due to the pressure change in the storage chamber 20, and can extract part of the gas in the storage chamber 20. The above external gas enters the storage chamber 20 due to the leakage of the low-pressure storage device, and the vacuum pump 32 extracts gas from the storage chamber 20 to form a partial gas exchange, but because the gas exchange volume is small and the door body 3 is in a closed state for a long time, it is necessary for the discharge module 91 to continuously discharge to strongly sterilize due to the growth of bacteria in the environment.

[0199] In some embodiments of the present application, when the low-pressure storage device keeps the door 3 closed and the vacuum pump 32 has not been working for a first stop time, the discharge module 91 is started and continues to work for a first discharge time to strongly sterilize the storage chamber 20.

[0200] Above, the first stop time that can be set is > 12 hours.

[0201] The low-pressure storage device is kept closed for a long time. When the low-pressure storage device is highly sealed, the pressure-maintaining performance of the low-pressure storage device is good, and the vacuum pump 32 is not started for a long time. The gas in the low-pressure storage device is kept in a sealed space, and the respiration and transpiration of the food cause bacteria to grow. At this time, the discharge module 91 continues to work for a long time to sterilize, which can adjust the current storage environment more quickly and effectively.

[0202] In some embodiments of the present application, an odor sensor is provided in the storage chamber 20. The odor sensor is a device that can detect and identify gas components, and can determine the type and concentration of odors by sensing the chemical composition of the gas. The odor sensor can be configured to identify substances such as volatile amines and determine their concentrations.

[0203] When the odor concentration in the storage chamber 20 reaches the first odor-free concentration, the discharge module 91 is activated and continues to work for the first odor-free time. When the above discharge module 91 is working, the ventilation unit is closed, the storage chamber 20 is disconnected from the outside, and the discharge module 91 discharges the sealed storage chamber 20 to purify the gas therein.

[0204] In some embodiments of the present application, when the odor concentration in the storage chamber 20 reaches the first odor-free concentration and the duration of the last vacuuming does not reach the first pressure-maintaining duration, the discharge module 91 is started and continues to work for the first odor-free duration. When the above discharge module 91 is working, the ventilation unit is closed, the storage chamber 20 is disconnected from the outside, and the discharge module 91 discharges the sealed storage chamber 20 to purify the gas therein.

[0205] When the odor concentration in the storage chamber 20 reaches the first odor-free concentration and the duration of the last vacuuming reaches the second pressure-maintaining time, the ventilation unit is turned off, the vacuum pump 32 is started, and continues to work for the first vacuuming time. After the vacuum pump 32 stops working, the discharge module 91 is started and continues to work for the second odor-free time. The second pressure-maintaining time is greater than the first pressure-maintaining time.

[0206] As a configurable method, the first pressure holding time is any value between 3 and 5 hours, and the second pressure holding time is any value between 10 and 12 hours.

[0207] As a configurable method, the first pressure holding time = the second pressure holding time.

[0208] When the holding time after vacuuming reaches the second holding time, due to the long holding time, it is close to the start of the next vacuuming. At this time, vacuuming is performed first, and then discharge deodorization is performed to prevent the ions released by discharge deodorization from being extracted when the next vacuuming is started, thereby weakening the deodorization effect.

[0209] In some embodiments of the present application, during deodorization, when the discharge module 91 continues to work for a first deodorization time (such as 20 minutes), and the odor concentration recognized by the odor sensor is higher than the second deodorization concentration, the discharge module 91 stops working.

[0210] In addition, when the low-pressure storage device remains closed, the odor sensor no longer recognizes the odor in real time; instead, it recognizes once every set odor recognition time. If the odor concentration in the storage chamber 20 reaches the first odor-free concentration, the discharge module 91 starts and stops working after the first odor-free time. Until the next time the low-pressure storage device is opened, the above odor recognition operation is maintained, and the time-controlled discharge odor-free operation is performed. Among them, the second odor-free concentration is less than the first odor-free concentration.

[0211] As a configurable method, the second net taste concentration is 80% to 90% of the first net taste concentration.

[0212] When high-odor ingredients such as durian meat and fermented bean curd are stored in a low-pressure storage device, the above operation can, on the one hand, relatively reduce the odor concentration; on the other hand, it can avoid ineffective odor removal operations and reduce energy consumption (the source of the odor of high-odor ingredients is the food itself, not the concentration accumulated in a long-term sealed environment).

[0213] In some embodiments of the present application, the low-pressure storage device has a low-pressure preservation mode, a sterilization preservation mode, and a deodorization preservation mode.

[0214] The discharge module 91 has a first discharge mode and a second discharge mode; wherein the first discharge mode of the discharge module 91 is mainly corona discharge, which produces a large amount of strong oxidizing active substances, including ozone, atomic oxygen, ground state oxygen, etc., mainly for deodorization and supplemented by sterilization. The second discharge mode is air discharge (sterilization), which mainly produces positive and negative ion groups for sterilization.

[0215] In the sterilization and fresh-keeping mode, the discharge module 91 discharges in the second discharge mode; and in the odor removal and fresh-keeping mode, the discharge module 91 discharges in the first discharge mode.

[0216] The low-pressure preservation mode is mainly used to store dry ingredients and anti-oxidation; the sterilization and preservation mode is mainly used to store maternal and infant ingredients; the odor-free preservation mode is mainly used to store ingredients with stronger odors, such as cooked food (braised beef).

[0217] In some embodiments of the present application, the ion generating module and the power supply module are both arranged on the adapter plate 7. The above arrangement enables the ion generating module and the power supply module to be detachably connected to the housing 2 through the adapter plate 7, which is convenient for testing the ion generating module and the power supply module, and also convenient for installing the ion generating module and the power supply module.

[0218] The storage chamber 20 is provided with the aforementioned controlled atmosphere membrane assembly to form a low oxygen environment in the low pressure storage chamber 12 .

[0219] In some embodiments of the present application, Figure 13-Figure 19 ,like Figure 20-24As shown, a photodynamic sterilization module is provided in the storage chamber 20 to sterilize the storage chamber 20 through the light emitted by it. Specifically, the photodynamic sterilization module includes a second circuit board 92 and a light-emitting component 93. The second circuit board 92 is connected to two conductive columns 6, and the light-emitting component 93 is connected to the second circuit board 92. When the light-emitting component 93 is powered on, the light it releases is bluish purple. The wavelength distribution range can be set to be between 390 and 420 nm. The bluish purple light released by the light-emitting component 93 kills and destroys the molecular structure of deoxyribonucleic acid or ribonucleic acid in bacteria and viruses, causing growth cell death and (or) regenerative cell death, thereby achieving the effect of sterilization and disinfection, and is used to sterilize and deodorize the storage chamber 20.

[0220] In some embodiments of the present application, the photodynamic sterilization module is disposed on the top wall of the housing 2 so that the light emitted by the light-emitting component 93 can irradiate various areas in the storage chamber 20 .

[0221] As a configurable manner, the power supply module and the photodynamic sterilization module are both arranged on the top wall of the shell 2 .

[0222] As a setting mode, the light emitting center of the light emitting component 93 is located at the geometric center of the top wall of the housing 2 .

[0223] As a configurable method, the photodynamic sterilization module is arranged on the adapter plate 7. The above arrangement enables the photodynamic sterilization module and the power-on module to be detachably connected to the housing 2 through the adapter plate 7, which is convenient for testing the photodynamic sterilization module and the power-on module, and also convenient for installing the photodynamic sterilization module and the power-on module.

[0224] In some embodiments of the present application, the opening 28 is formed on the top wall of the housing 2 , and the adapter plate 7 is installed on the top wall of the housing 2 .

[0225] In some embodiments of the present application, the photodynamic sterilization module includes a glass plate 8, a second circuit board 92, and a light-emitting component 93 connected to the second circuit board 92. The glass plate 8 is located on the side of the light-emitting component 93 close to the storage chamber 20. The glass plate 8 protrudes toward the side close to the storage chamber 20, and the light emitted by the light-emitting component 93 enters the storage chamber 20 after passing through the glass plate 8. The above glass plate 8 is configured to protrude toward the side close to the storage chamber 20, and it has a light-collecting function to allow more light to enter the storage chamber 20.

[0226] In some embodiments of the present application, a cover 17 is installed on a side of the light emitting component 93 away from the storage chamber 20 to protect the light emitting component 93 .

[0227] In some embodiments of the present application, a mounting groove 25 is formed on the housing 2 , and a mounting strip 80 matching the mounting groove 25 is provided on a side of the glass plate 8 close to the storage chamber 20 .

[0228] In addition, a support platform 24 is formed on the shell 2, and the support platform 24 surrounds the periphery of the mounting groove 25, and the height of the support platform 24 is higher than the mounting groove 25. The cover 17 has a matching plate 18 located at its circumferential edge, and a support plate 19 located on the side of the cover 17 close to the storage chamber 20. Among them, the matching plate 18 of the cover 17 matches with the support platform 24 on the shell 2, and the support plate 19 on the cover 17 matches with the glass plate 8. The light-emitting component 93 is installed in the space defined by the support plate 19, the cover 17 and the glass plate 8. The above arrangement forms a light-gathering space, and utilizes the light-gathering effect of the glass plate 8 protruding toward the side close to the storage chamber 20 to reduce light loss and increase the light entering the storage chamber 20.

[0229] A sealing ring 71 is provided between the mounting strip 80 and the mounting groove 25 to seal the two.

[0230] In some embodiments of the present application, the low-pressure storage device has a low-pressure preservation mode, a sterilization preservation mode, a rapid sterilization mode, and a normal sterilization mode.

[0231] Among them, the low-pressure preservation mode is mainly used to store dry food and anti-oxidation; the sterilization and preservation mode is mainly used to store maternal and infant food.

[0232] In the rapid sterilization mode, the ion generation module or the photodynamic sterilization module operates at a first power for a first sterilization duration. In the normal sterilization mode, the ion generation module or the photodynamic sterilization module operates at a second power for a second sterilization duration. The first power is not less than the second power, and the first sterilization duration is less than the second sterilization duration.

[0233] As a configurable manner, in the normal sterilization mode, the ion generating module or the photodynamic sterilization module operates at a second power for a second sterilization duration at a first time interval.

[0234] As mentioned above, the rapid sterilization mode is mainly used to sterilize immediately edible food materials so as to sterilize the food materials in a short time.

[0235] The normal sterilization mode is mainly used to sterilize general food ingredients and does not have high requirements for ready-to-use.

[0236] As a configurable manner, the ion generating module or the photodynamic sterilization module moves at the first power for 15 minutes.

[0237] In the normal sterilization mode, the ion generation module or the photodynamic sterilization module operates at the second power for 3 minutes every 6 hours.

[0238] 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.

[0239] 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, which defines 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 sealing element is provided on the door body or the housing so as to form an airtight joint between the housing and the door body when the door body is in the closed position; 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 along the guide rail device; A locking structure, used to lock the door body and the housing when the door body is closed; When the door body is closed, the locking structure locks the door body and the shell; the door body and the shell squeeze the sealing element; When the vacuum device is working, the air pressure in the storage chamber decreases. Under the action of the pressure difference between the side of the door body close to the outside and the side of the door body 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.

2. The refrigerator according to claim 1, characterized in that: The locking structure is a push-to-open locking structure; by pressing the push-to-open locking structure once, the push-to-open locking structure switches between a locked state and an unlocked state; The sealing element has a maximum deformable distance L0, and the push-to-lock structure has an unlocking stroke J0; When the door body is locked by the locking structure, the compressed length of the sealing element reaches the pre-locking compression distance L1; when the vacuum device completes vacuuming, the compressed length of the sealing element is the vacuum compression distance L2; Among them, L2-L1≥J0, L0-L1≥J0.

3. The refrigerator according to claim 2, characterized in that: When the vacuum device completes vacuuming, the internal pressure value of the low-pressure storage device is P1, and the pressure value outside the door body of the low-pressure storage device is P0; the area of ​​the door body is S, and the force of the push-to-pop locking structure to trigger the pop-up is F1; wherein, F1<(P0-P1)*S.

4. The refrigerator according to claim 1, characterized in that: The locking structure is a push-to-open locking structure; by pressing the push-to-open locking structure once, the push-to-open locking structure switches between a locked state and an unlocked state; The sealing element has a maximum deformable distance L0, and the push-to-lock structure has an unlocking stroke J0; When the door body is locked by the locking structure, the compressed length of the sealing element reaches the pre-locking compression distance L1; when the vacuum device completes vacuuming, the compressed length of the sealing element is the vacuum compression distance L2; Among them, L2-L1<J0, L0-L1≥J0.

5. The refrigerator according to claim 1, characterized in that: The locking structure has a double self-locking function; When the door body is closed, after the door body moves a first distance, the door body and the shell complete the first-level locking; the door body and the shell squeeze the sealing element; The air extraction device works, the door body continues to move a second distance in the closing direction, and the door body and the shell complete the second-level locking.

6. The refrigerator according to claim 5, characterized in that: The guide rail device comprises an inner rail and an outer rail; the inner rail is fixedly connected to the inner wall of the shell, the outer rail is fixedly connected to the storage container, and the inner rail and the outer rail are movably connected; The inner rail is provided with a first locking portion, and the outer rail is provided with a second locking portion; after the door body is closed and moves a first distance, the first locking portion cooperates with the second locking portion to complete the first level of locking.

7. The refrigerator according to claim 6, characterized in that: The outer rail is provided with a first connecting member rotatably connected thereto, and the first locking portion is provided on the first connecting member; A torsion spring is provided between the first connecting member and an end of the outer rail away from the storage opening; When the door body is closed, when the first locking part cooperates with the second locking part, the first connecting member rotates and squeezes the torsion spring, so that the torsion spring is compressed in the radial direction. When the first locking part and the second locking part are locked to complete the first level of locking, the torsion spring reaches a critical value of the torsion spring; Afterwards, the torsion spring begins to stretch, and under the action of the torsion spring, the torsion spring drives the inner rail to continue to move a second distance in the closing direction through the first connecting member, thereby completing the second-level locking.

8. The refrigerator according to claim 1 or 2 or 4 or 5 or 6, characterized in that: The storage room has a take-out opening; the refrigerator includes two cabinet doors arranged opposite to each other, and the two cabinet doors arranged opposite to each other cooperate to open or close the take-out opening; wherein a flip beam is provided on the inner lining surface of one cabinet door close to the other cabinet door; when the two cabinet doors are closed, the flip beam flips and seals the gap between the cabinet doors and the cabinet body; The rotation axis of the flip beam is recorded as the flip axis M; the flip beam includes a free end parallel to the flip axis M, and the free end rotates around the flip axis M; When the box door is closed, on the projection of the plane where the access opening is located, the direction perpendicular to the flip axis M of the flip beam is recorded as the first direction; During the closing process of the box door, the flip beam interacts with the door body, and under the action of the flip beam, the door body moves along the second moving direction through the guide rail device, so that the locking structure locks the door body and the shell.

9. The refrigerator according to claim 8, characterized in that: On the projection of the plane where the access port is located, the midpoint of the projection of the door body along the first moving direction is marked as O; the reference line passing through the midpoint O and perpendicular to the first direction is marked as the first reference line L; During the closing process of the box door, on the projection of the plane where the access opening is located, the projection of the flip beam overlaps with the first reference line L of the door body.

10. The refrigerator according to claim 8, characterized in that: In the direction perpendicular to the plane where the access port is located, the maximum displacement of the free end of the flip beam entering the storage room during the flipping process is recorded as W; when the door body and the shell are locked by the locking structure, the distance between the front end of the door body and the plane where the access port is located is recorded as D; D≤W.

Images