Fresh-keeping device for refrigerator, and refrigerator

Abstract

A fresh-keeping device (10) for a refrigerator, and a refrigerator. The fresh-keeping device (10) comprises an air extraction device (10b) and at least one fresh-keeping unit (10a). Each fresh-keeping unit (10a) comprises: a fresh-keeping box (11), which has a fresh-keeping space (111) defined therein; and an air delivery assembly (14), which is detachably connected between the air extraction device (10b) and the fresh-keeping box (11), such that when in a first state in which the air delivery assembly is connected to the air extraction device (10b) and the fresh-keeping box (11), the air delivery assembly brings the air extraction device (10b) into communication with the fresh-keeping space (111), and when in a second state in which the air delivery assembly is separated from the fresh-keeping box (11), the air delivery assembly forms a self-seal so as to prevent an airflow from flowing therethrough. The fresh-keeping device (10) is configured to perform suction, by means of the air extraction device (10b), on gas in the fresh-keeping space (111) in communication with the fresh-keeping device (10), so as to create in the fresh-keeping space (111) a low-oxygen environment having an oxygen content lower than the oxygen content in the air.

Description

Fresh-keeping device for refrigerator and refrigerator

[0001] This application is based on the Chinese patent application with application number 202311011900.1 and application date of August 11, 2023, and the Chinese patent application with application number 202311022418.8 and application date of August 14, 2023, and claims the priority of the aforementioned Chinese patent applications. The entire contents of the above-mentioned patent applications are hereby introduced into this application as a reference. Technical Field

[0002] The present application relates to refrigeration and freezing technology, and in particular to a fresh-keeping device for a refrigerator and a refrigerator. Background Art

[0003] Food mold is primarily caused by microbial activity. Most molds and yeasts rely on oxygen and a suitable temperature for survival. Currently, the primary methods for preserving food are reducing oxygen levels and lowering temperatures. Specific methods for addressing low-oxygen environments include vacuum preservation and inert gas. Both methods aim to maintain freshness by altering the ambient gas composition without changing the storage space. The basic principle of vacuum preservation is to remove air from the container using a vacuum pump, reducing the amount of oxygen.

[0004] The applicant previously proposed a fresh-keeping device that includes multiple fresh-keeping boxes. A vacuum device simultaneously draws air from multiple boxes, creating a roughly identical or similar storage environment within each box. This makes it difficult to create storage environments with varying oxygen content within each box, even if the device includes multiple, different boxes. This hinders the separate storage of ingredients with varying oxygen requirements.

[0005] The reference to any prior art in the specification is not an acknowledgement or suggestion that the prior art forms part of the common general knowledge in any jurisdiction, or that it could reasonably be expected that the person skilled in the art would understand, consider relevant and / or combine with other prior art.

[0006] Summary of the Invention

[0007] One purpose of the first aspect of the present application is to overcome at least one defect of the related art, provide a fresh-keeping device for a refrigerator, and facilitate the formation of fresh-keeping spaces with different environments in the fresh-keeping device.

[0008] Another object of the first aspect of the present application is to improve the air extraction efficiency of the air extraction device.

[0009] A further object of the first aspect of the present application is to effectively reduce the oxygen content in the fresh-keeping device in a manner that almost eliminates the pressure difference, thereby extending the fresh-keeping storage period of the food.

[0010] The second aspect of the present application aims to provide a refrigerator having the above-mentioned fresh-keeping device.

[0011] According to a first aspect of the present application, the present application provides a fresh-keeping device for a refrigerator, which includes an exhaust device and at least one fresh-keeping unit, wherein

[0012] Each of the fresh-keeping units comprises:

[0013] A fresh-keeping box having a fresh-keeping space defined therein for storing items; and

[0014] The gas transmission component is detachably connected between the air extraction device and the fresh-keeping box, so as to connect the air extraction device and the fresh-keeping space when it is in a first state where the air extraction device and the fresh-keeping box are connected, and to form a self-seal when it is in a second state where the air extraction device is separated from the fresh-keeping box, thereby preventing air flow therethrough; and the fresh-keeping device is configured to suck the gas in the fresh-keeping space connected thereto through the air extraction device, so as to form a low-oxygen environment in the fresh-keeping space where the oxygen content is lower than the oxygen content in the air.

[0015] Optionally, there are multiple fresh-keeping units, and the multiple fresh-keeping units are independently arranged.

[0016] Optionally, each of the fresh-keeping units further includes:

[0017] The oxygen-enriched membrane assembly has at least one oxygen-enriched membrane, and the oxygen-enriched membrane is configured so that the oxygen in the air located on the first side thereof passes through the oxygen-enriched membrane to flow to the second side of the oxygen-enriched membrane in greater quantities than the nitrogen therein; wherein the first side of the oxygen-enriched membrane is connected to the fresh-keeping space; the second side of the oxygen-enriched membrane is connected to the exhaust device when the gas transmission assembly is in the first state, so that the gas in the space where the second side of the oxygen-enriched membrane is located is sucked by the exhaust device, thereby forming a negative pressure in the fresh-keeping space; and a pressure balancing hole connecting the fresh-keeping space and the external space of the fresh-keeping box is opened on the fresh-keeping box, so that when a negative pressure is formed in the fresh-keeping space, the air in the external space of the fresh-keeping box enters the fresh-keeping space through the pressure balancing hole.

[0018] Optionally, the fresh-keeping box includes a box body and a cover body arranged on the box body;

[0019] The fresh-keeping space is formed in the box body, and the pressure balance hole is opened on the box body; and an exhaust hole connected to the fresh-keeping space is opened on the cover body, and the gas supply component is detachably sealed and connected to the exhaust hole to suck the gas in the fresh-keeping space through the exhaust hole.

[0020] Optionally, the cover body includes an inner cover and an outer cover covering the outside of the inner cover, and the inner cover and the outer cover are spaced apart to form a accommodating cavity; the air extraction hole is provided on the outer cover; a through hole is provided on the inner cover, and the accommodating cavity is connected with the fresh-keeping space through the through hole; and the oxygen-enriched membrane assembly is provided in the accommodating cavity, and the first side of the oxygen-enriched membrane is connected with the accommodating cavity.

[0021] Optionally, the oxygen-enriched membrane assembly includes two oxygen-enriched membranes arranged in parallel and at intervals;

[0022] The first sides of the two oxygen-enriched membranes are arranged back to back and are both exposed in the accommodating cavity; the second sides of the two oxygen-enriched membranes are arranged opposite to each other to form an oxygen-enriched gas collecting cavity between the two oxygen-enriched membranes; and the exhaust hole is connected to the oxygen-enriched gas collecting cavity through an exhaust pipeline.

[0023] Optionally, the oxygen-enriched membrane assembly extends obliquely upward from the first side of the cover body to the second side of the cover body, and the first side of the cover body is arranged opposite to the second side of the cover body; and the oxygen-enriched membrane assembly is spaced apart from the cover body on the second side of the cover body, and the exhaust pipeline is connected to the oxygen-enriched gas collecting chamber at the end of the oxygen-enriched membrane assembly adjacent to the second side of the cover body.

[0024] Optionally, the fresh-keeping box is provided with an exhaust hole connected to the fresh-keeping space; and the gas supply assembly includes an air supply pipe and a self-sealing mechanism; wherein the exhaust device is connected to the self-sealing mechanism, and the air supply pipe is detachably connected between the self-sealing mechanism and the exhaust hole; and the self-sealing mechanism is configured to connect the air supply pipe and the exhaust device when the air supply pipe is connected between the self-sealing mechanism and the exhaust hole, and to block the exhaust path of the exhaust device at the self-sealing mechanism when the air supply pipe is separated from the self-sealing mechanism and the exhaust hole.

[0025] Optionally, the self-sealing mechanism includes:

[0026] A support frame, wherein an air delivery cavity is defined within the support frame, and a connecting hole is formed on one of the side walls defining the air delivery cavity;

[0027] An elastic sealing structure is provided in the gas delivery cavity and is configured to be operable to switch between a closed state for blocking the connecting hole and an open state for opening the connecting hole; wherein

[0028] The air extraction device is in communication with the air delivery cavity;

[0029] One end of the gas pipe is detachably inserted into the connecting hole, so that when it is inserted into the connecting hole, the elastic sealing structure is caused to switch to the open state, thereby allowing the gas pipe to communicate with the gas delivery cavity through the connecting hole; after it is removed from the connecting hole, the elastic sealing structure is restored to the closed state, thereby blocking the connecting hole.

[0030] Optionally, the exhaust hole is opened at the top of the fresh-keeping box, and the side wall where the connecting hole is located faces the fresh-keeping box and extends vertically; and the gas pipe has a vertical pipe section extending vertically and used to be connected to the exhaust hole, and a horizontal pipe section extending horizontally and used to be connected to the connecting hole.

[0031] Optionally, a horizontally extending rotating shaft is provided on the support frame, and the gas pipe is configured to be operably rotated in the up and down directions around the rotating shaft; and the rotating shaft is inserted into the horizontal pipe section in a direction perpendicular to the horizontal pipe section, and the rotating shaft deviates upward from the center of the horizontal pipe section in the vertical direction.

[0032] Optionally, the elastic sealing structure includes:

[0033] a hollow column, disposed on a side of the gas delivery cavity opposite to the connecting hole, and having an opening facing the side where the connecting hole is located;

[0034] An insertion rod, one end of which is inserted into the hollow column through the opening, and the other end of which is provided with a sealing plate located outside the hollow column, wherein the plane where the sealing plate is located is parallel to the plane where the connecting hole is located; and

[0035] An elastic member is arranged between the bottom of the hollow column and the insertion rod; wherein when the gas delivery component is in the first state, one end of the gas delivery pipe is inserted into the connecting hole from the outside of the gas delivery cavity, and squeezes the sealing plate in a direction away from the connecting hole, so as to cause the sealing plate and the insertion rod to move in a direction away from the connecting hole, thereby compressing the elastic member and forming a gap between the sealing plate and the connecting hole, so that the gas delivery pipe is connected with the gas delivery cavity through the gap; and when the gas delivery component is in the second state, one end of the gas delivery pipe extends outward from the connecting hole to release the sealing plate, so that the sealing plate moves toward the connecting hole under the elastic deformation recovery force of the elastic member until the sealing plate is attached to the side wall where the connecting hole is located and covers the connecting hole.

[0036] According to a second aspect of the present application, the present application further provides a refrigerator, comprising:

[0037] a box body defining at least one storage compartment;

[0038] at least one door for opening and closing the at least one storage compartment; and

[0039] The fresh-keeping device according to any of the above solutions is arranged in the box body or one of the doors.

[0040] The fresh-keeping device of the present application includes an air extraction device and at least one fresh-keeping unit. Each fresh-keeping unit includes not only a fresh-keeping box defining a fresh-keeping space, but also a gas supply assembly detachably connected between the air extraction device and the fresh-keeping box. When the gas supply assembly is in a first state connecting the air extraction device and the fresh-keeping box, the air extraction device and the fresh-keeping space within the fresh-keeping box are connected. When the air extraction device is in operation, the air extraction device allows the air extraction device to draw gas from the fresh-keeping space through the gas supply assembly, thereby creating a low-oxygen environment in the fresh-keeping space, which is beneficial for preserving food in the fresh-keeping space. When the gas supply device is in a second state separated from the fresh-keeping box, the gas supply assembly forms a self-sealing seal. Even if the air extraction device is in operation, gas cannot be drawn through the gas supply assembly. This is equivalent to blocking the air extraction path of the air extraction device at the air extraction assembly. The air extraction device cannot draw gas from the fresh-keeping space through the gas supply assembly, nor can it draw gas from outside the fresh-keeping device through the gas supply assembly. This facilitates the air extraction device to more effectively draw gas from other fresh-keeping spaces through other gas supply assemblies.

[0041] The present application separately sets up a gas transmission component for each fresh-keeping unit, so that the air extraction process of the fresh-keeping unit is independent of the air extraction process of other fresh-keeping units. Whether to extract air and the duration of air extraction of each fresh-keeping unit can be different from those of other fresh-keeping units. On the one hand, a low-oxygen environment with different oxygen contents can be formed in different fresh-keeping units, so as to more accurately preserve and store different types of food with higher quality. On the other hand, the self-sealing function of the gas transmission component can prevent the air extraction device from ineffectively extracting gas outside the fresh-keeping device, thereby improving the air extraction efficiency of the air extraction device.

[0042] Furthermore, the fresh-keeping box is provided with a pressure-balancing hole connecting the fresh-keeping space and the space outside the box. When the exhaust device is activated, it can draw gas from the space located on the second side of the oxygen-enriched membrane, forming a negative pressure in the space located on the second side of the oxygen-enriched membrane. Under the action of this negative pressure, oxygen in the fresh-keeping space connected to the first side of the oxygen-enriched membrane flows through the oxygen-enriched membrane into the space located on the second side of the oxygen-enriched membrane, and is then extracted by the exhaust device. A certain negative pressure is formed in the fresh-keeping space. Under the action of this negative pressure, air in the space outside the fresh-keeping box can enter the fresh-keeping space through the pressure-balancing hole, quickly balancing the negative pressure in the fresh-keeping space, thereby maintaining a dynamic balance between the air pressure in the fresh-keeping space and the space outside the fresh-keeping box. When the exhaust device stops running, on the one hand, the oxygen in the fresh-keeping space is extracted and is in a low-oxygen state with a low oxygen content; on the other hand, there is almost no pressure difference between the fresh-keeping space and the space outside the fresh-keeping box. Therefore, there is almost no airflow between the fresh-keeping space and the space outside the fresh-keeping box, and the low-oxygen state can be maintained in the fresh-keeping space for a long time, which is conducive to the long-term preservation of food in the fresh-keeping space, extends the fresh-keeping period, and effectively reduces the risk of odor transfer between the inside and outside of the fresh-keeping device.

[0043] Based on the detailed description of the specific embodiments of the present application in conjunction with the accompanying drawings below, those skilled in the art will become more aware of the above and other objects, advantages and features of the present application.

[0044] As used herein, the term "comprise" and variations of the term, such as "comprises," "comprised," "comprising," "including," and "containing" do not exclude other features, components, elements, or steps unless the context clearly requires otherwise. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Hereinafter, some specific embodiments of the present application will be described in detail in an exemplary and non-limiting manner with reference to the accompanying drawings. The same reference numerals in the drawings indicate the same or similar components or parts. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale. In the drawings:

[0046] FIG1 is a schematic structural diagram of a fresh-keeping device for a refrigerator according to one embodiment of the present application;

[0047] FIG2 is a schematic exploded view of a fresh-keeping device for a refrigerator according to one embodiment of the present application;

[0048] FIG3 is a schematic cross-sectional view of a fresh-keeping device for a refrigerator according to one embodiment of the present application;

[0049] FIG4 is a schematic cross-sectional view of an oxygen-enriched membrane module according to one embodiment of the present application;

[0050] FIG5 is a schematic exploded structural diagram of a fresh-keeping box in a cross-sectional state according to one embodiment of the present application;

[0051] FIG6 is a schematic exploded view of the structure of a gas delivery assembly in a cross-sectional state according to one embodiment of the present application;

[0052] FIG7 is a schematic structural diagram of a refrigerator according to one embodiment of the present application;

[0053] FIG8 is a schematic structural diagram of a door body according to one embodiment of the present application;

[0054] FIG9 is a schematic structural diagram of a fresh-keeping device for a refrigerator according to one embodiment of the present application;

[0055] 10 to 12 are schematic cross-sectional views of a fresh-keeping device in different storage states according to one embodiment of the present application;

[0056] FIG13 is a schematic structural cross-sectional view of a fresh-keeping box according to one embodiment of the present application;

[0057] FIG14 is a schematic cross-sectional view of an oxygen-enriched membrane module according to one embodiment of the present application;

[0058] FIG15 is a schematic cross-sectional view of a cover according to an embodiment of the present application. DETAILED DESCRIPTION

[0059] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0060] The following mainly describes the specific structure of the fresh-keeping device and the refrigerator. It is worth noting that, in order to avoid making the description too complicated by repeatedly describing the same feature, the features in the following embodiments can be applied to other embodiments and can be organically combined with other embodiments. It should be understood that the description has provided an example of applying the feature to other embodiments.

[0061] The present application first provides a fresh-keeping device for a refrigerator. Figure 1 is a schematic structural diagram of the fresh-keeping device for a refrigerator according to one embodiment of the present application. Figure 2 is a schematic structural exploded view of the fresh-keeping device for a refrigerator according to one embodiment of the present application. Figure 3 is a schematic cross-sectional view of the fresh-keeping device for a refrigerator according to one embodiment of the present application. Referring to Figures 1 to 3, the fresh-keeping device 10 of the present application includes an exhaust device 10b and at least one fresh-keeping unit 10a. Specifically, the number of fresh-keeping units 10a can be one or more.

[0062] In particular, each fresh-keeping unit 10 a includes a fresh-keeping box 11 and a gas delivery component 14 .

[0063] The fresh-keeping box 11 defines a fresh-keeping space 111 for storing items.

[0064] The air delivery component 14 is detachably connected between the air extraction device 10b and the fresh-keeping box 11, so as to connect the air extraction device 10b and the fresh-keeping box 11 when it is in a first state in which the air extraction device 10b and the fresh-keeping box 11 are connected, and to form a self-seal when it is in a second state in which it is separated from the fresh-keeping box 11, thereby preventing air flow from flowing therethrough.

[0065] Furthermore, the fresh-keeping device 10 is configured to draw gas from the fresh-keeping space 111 connected thereto through the air extraction device 10b, thereby creating a hypoxic environment in the fresh-keeping space 111 where the oxygen content is lower than that in the air. In other words, the air extraction device 10b can only draw gas from the fresh-keeping space 111 connected thereto, and cannot draw gas from fresh-keeping spaces 111 not connected thereto.

[0066] The fresh-keeping device 10 of the present application includes an air extraction device 10b and at least one fresh-keeping unit 10a. Each fresh-keeping unit 10a not only includes a fresh-keeping box 11 defining a fresh-keeping space 111, but also is specifically provided with a gas transmission assembly 14 that is detachably connected between the air extraction device 10b and the fresh-keeping box 11. When the gas transmission assembly 14 is in a first state connecting the air extraction device 10b and the fresh-keeping box 11, the air extraction device 10b and the fresh-keeping space 111 in the fresh-keeping box 11 are connected. When the air extraction device 10b is in operation, the air extraction device 10b is allowed to draw gas from the fresh-keeping space 111 through the gas transmission assembly 14, thereby forming a low-oxygen environment in the fresh-keeping space 111, which is beneficial for preserving the food in the fresh-keeping space 111.

[0067] When the gas delivery device 14 is in the second state, separated from the fresh-keeping box 11, the gas delivery assembly 14 forms a self-sealing state. Even if the gas extraction device 10b is in operation, it cannot draw gas through the gas delivery assembly 14. This effectively blocks the gas extraction path of the gas extraction device 10b at the gas extraction assembly 14. The gas extraction device 10b cannot draw gas from the fresh-keeping space 111 through the gas delivery assembly 14, nor can it draw gas from outside the fresh-keeping box 10 through the gas delivery assembly 14. This allows the gas extraction device 10b to more effectively draw gas from other fresh-keeping spaces 111 through other gas delivery assemblies 14.

[0068] In the present application, a gas transmission component 14 is separately provided for each fresh-keeping unit 10a, so that the air extraction process of the fresh-keeping unit 10a is independent of the air extraction process of other fresh-keeping units 10a. Whether each fresh-keeping unit 10a is exhausted and the duration of exhaustion can be different from those of other fresh-keeping units 10a. On the one hand, a low-oxygen environment with different oxygen contents can be formed in different fresh-keeping units 10a, so that different types of food can be more accurately preserved and stored with higher quality. On the other hand, the self-sealing function of the gas transmission component 14 can prevent the exhaust device 10b from ineffectively extracting the gas outside the fresh-keeping device 10, thereby improving the exhaust efficiency of the exhaust device 10b.

[0069] In some embodiments, multiple fresh-keeping units 10a are provided, each independently configured. This means that the food storage and air extraction processes in each of the fresh-keeping units 10a are independent and do not affect each other. This allows for the creation of low-oxygen environments with varying oxygen content within each of the fresh-keeping units 10a, enabling more precise and high-quality fresh-keeping of different types of food.

[0070] It is understandable that there are many ways for the fresh-keeping device 10 to create a low-oxygen environment in the fresh-keeping space 111. In the related art, the oxygen content in the fresh-keeping space 111 is usually reduced by vacuuming the fresh-keeping space 111. However, this vacuum preservation method has many problems. For example, the gas extracted is almost air with an equal proportion of components, not all oxygen, and the preservation effect is not very ideal; the premise of vacuum preservation is that the container is sealed, and the sealing requirements of the container are high; when the food is placed in the container and the vacuum is drawn, the air pressure in the container decreases, resulting in a large pressure difference between the inside and outside of the food. For food with high moisture content, the risk of moisture loss is very high; the high pressure difference between the inside and outside of the container may pose a safety risk if the food is not taken out according to the method specified by the designer; vacuum preservation has high requirements for the sealing of the container. During the pressure holding time, it will slowly leak, and an air pump is required to automatically pump air at regular intervals, resulting in a short pressure holding period; during the pressure holding time, since the container will slowly leak, gas outside the container, such as gas in the refrigerator, will enter the container, and the risk of flavor transfer is relatively high.

[0071] To address the aforementioned technical issues, in some embodiments of the present application, each fresh-keeping unit 10a further includes an oxygen-enriched membrane assembly 12. Figure 4 is a schematic cross-sectional view of an oxygen-enriched membrane assembly according to one embodiment of the present application. The oxygen-enriched membrane assembly 12 comprises at least one oxygen-enriched membrane 121. The oxygen-enriched membrane 121 is configured such that oxygen in the air on its first side passes through the membrane 121 to a greater extent than nitrogen in the air therein, flowing toward the second side of the membrane 121. The first side of the oxygen-enriched membrane 121 is in communication with the fresh-keeping space 111.

[0072] Specifically, the oxygen-enriched membrane 121 may be an oxygen-permeable membrane that allows only oxygen and moisture in the air to pass through it, but does not allow nitrogen in the air to pass through it. Furthermore, oxygen and moisture can only pass through the oxygen-enriched membrane 121 in one direction, from the first side of the oxygen-enriched membrane 121 to the second side of the oxygen-enriched membrane 121.

[0073] Furthermore, when the gas delivery assembly 14 is in its first state, the second side of the oxygen-enriched membrane 121 is connected to the exhaust device 10b, so that the gas in the space where the second side of the oxygen-enriched membrane 121 is located is sucked through the exhaust device 10b, thereby forming a negative pressure in the fresh-keeping space 111.

[0074] In particular, the fresh-keeping box 11 is provided with a pressure balancing hole 112 connecting the fresh-keeping space 111 and the space outside the fresh-keeping box 11 , so that when negative pressure is formed in the fresh-keeping space 111 , the air in the space outside the fresh-keeping box 11 enters the fresh-keeping space 111 through the pressure balancing hole 112 .

[0075] The present application also provides a pressure balancing hole 112 on the fresh-keeping box 11 that connects the fresh-keeping space 111 and the space outside the fresh-keeping box 11. When the exhaust device 10b is started, the gas in the space where the second side of the oxygen-enriched membrane 121 is located can be sucked, and a negative pressure is formed in the space where the second side of the oxygen-enriched membrane 121 is located. Under the action of this negative pressure, the oxygen in the fresh-keeping space 111 connected to the first side of the oxygen-enriched membrane 121 flows through the oxygen-enriched membrane 121 to the space where the second side of the oxygen-enriched membrane 121 is located, and is extracted by the exhaust device 10b. A certain negative pressure is formed in the fresh-keeping space 111. Under the action of this negative pressure, the air in the space outside the fresh-keeping box 11 can enter the fresh-keeping space 111 through the pressure balancing hole 112 to quickly balance the negative pressure in the fresh-keeping space 111, so that the air pressure in the fresh-keeping space 111 and the space outside the fresh-keeping box 11 maintain a dynamic balance.

[0076] It is understood that a certain amount of oxygen is extracted from the fresh-keeping space 111 by the extraction device 10b, and the same amount of air enters the fresh-keeping space 111 through the pressure balance hole 112. Although the total amount of gas in the fresh-keeping space 111 remains almost unchanged, the oxygen content in the air is only about 21%, far less than the amount of oxygen extracted by the extraction device 10b. Therefore, during the operation of the extraction device 10b, the oxygen content in the fresh-keeping space 111 gradually decreases.

[0077] When the exhaust device 10b stops running, on the one hand, more oxygen in the fresh-keeping space 111 is extracted and the space is in a low-oxygen state with a low oxygen content; on the other hand, there is almost no pressure difference between the fresh-keeping space 111 and the external space of the fresh-keeping box 11. Therefore, there is almost no air flow between the fresh-keeping space 111 and the external space of the fresh-keeping box 11, and the low-oxygen state can be maintained in the fresh-keeping space 111 for a long time, which is beneficial to the long-term preservation of food in the fresh-keeping space 111, extending the fresh-keeping period of food, and effectively reducing the risk of odor transfer between the inside and outside of the fresh-keeping device 10.

[0078] Furthermore, during the vacuuming process, the fresh-keeping device 10 of the present application maintains airflow between the fresh-keeping space 111 and the external space, eliminating the need for a completely sealed fresh-keeping device, thereby reducing the design requirements for its sealing performance. Furthermore, since no negative pressure is formed within the fresh-keeping space 111, no matter how the user accesses the food, there are no safety hazards and no moisture loss from the food within the fresh-keeping space 111, further enhancing the fresh-keeping effect.

[0079] It can be seen that the present application forms a low-oxygen environment in the fresh-keeping space 111 without a pressure difference by opening a simple pressure balance hole 112 on the fresh-keeping device 10, thereby achieving the above-mentioned many beneficial technical effects. The structural conception is very clever, the structural design is very simple, and it is easy to implement.

[0080] The applicant has realized that in order to better achieve the preservation effect of the preservation device 10 and to extend the preservation time of the preservation device 10 as much as possible, the diameter of the pressure balance hole 112 cannot be too large. For example, the diameter of the pressure balance hole 112 is not greater than 10 mm.

[0081] Figure 5 is a schematic exploded view of a crisper container according to one embodiment of the present application, in cross-section. In some embodiments, the crisper container 11 includes a box body 15 and a cover 16 disposed over the box body 15. A crisper space 111 is formed within the box body 15, and a pressure balancing hole 112 is provided in the box body 15 to directly communicate with the crisper space 111 within the box body 15.

[0082] Specifically, the pressure balancing hole 112 can be opened on the bottom wall or the side wall of the box body 15. Since the pressure balancing hole 112 has a small hole diameter, the food will not leak out through the pressure balancing hole 112.

[0083] Furthermore, the cover 16 is provided with an air extraction hole 161 communicating with the fresh-keeping space 111 , and the gas delivery assembly 14 is detachably sealedly connected to the air extraction hole 161 to extract the gas in the fresh-keeping space 111 through the air extraction hole 161 .

[0084] In other words, the gas delivery assembly 14 is detachably and hermetically connected to the top of the fresh-keeping box 11, making it easy for the user to remove and install the gas delivery assembly 14. Specifically, when the user needs to place items into the fresh-keeping space 111, they can remove the gas delivery assembly 14 from the top of the fresh-keeping box 11 and then open the lid 16. When the items are placed, the user can close the lid 16 and then connect the gas delivery assembly 14 to the top of the fresh-keeping box 11.

[0085] In some embodiments, the cover body 16 includes an inner cover 162 and an outer cover 163 covering the outer side of the inner cover 162 . The inner cover 162 and the outer cover 163 are spaced apart to form a receiving cavity 164 .

[0086] Furthermore, the air extraction hole 161 is formed on the outer cover 163. The inner cover 162 is provided with a through hole 1621, and the accommodating cavity 164 is connected to the fresh-keeping space 111 through the through hole 1621. Thus, the air extraction hole 161 is connected to the fresh-keeping space 111 through the accommodating cavity 164 and the through hole 1621 in sequence.

[0087] Furthermore, the oxygen-enriching membrane assembly 12 is disposed within the accommodating cavity 164. The first side of the oxygen-enriching membrane 121 communicates with the accommodating cavity 164, thereby indirectly communicating with the fresh-keeping space 111. In other words, the oxygen-enriching membrane assembly 12 is concealed within the lid 16, eliminating the need to occupy space within the box body 15. This does not affect the appearance of the fresh-keeping box 11 or the accessibility of food. Furthermore, the oxygen-enriching membrane assembly 12 is relatively close to the gas delivery assembly 14, facilitating structural layout. Furthermore, the double-layered structure of the lid 16 facilitates maintenance and replacement of the oxygen-enriching membrane assembly 12.

[0088] In some embodiments, the oxygen-enriching membrane assembly 12 includes two oxygen-enriching membranes 121 arranged in parallel and spaced apart. The first sides of the two oxygen-enriching membranes 121 are disposed opposite each other and are both exposed within the accommodating chamber 164, thereby communicating with the accommodating chamber 164. The second sides of the two oxygen-enriching membranes 121 are disposed opposite each other, forming an oxygen-enriched gas collection chamber 122 between the two oxygen-enriching membranes 121. The air extraction hole 161 is connected to the oxygen-enriched gas collection chamber 122 via an air extraction line 165.

[0089] Therefore, when the gas delivery component 14 is connected to the exhaust hole 161, the exhaust device 10b is connected to the oxygen-rich gas collecting chamber 122 through the gas delivery component 14, the exhaust hole 161, and the exhaust pipe 165, thereby sucking the gas in the oxygen-rich gas collecting chamber 122, and forming a negative pressure in the oxygen-rich gas collecting chamber 122. Under the action of this negative pressure, the oxygen in the accommodating chamber 164 can flow to the oxygen-rich gas collecting chamber 122 at the same time through the two oxygen-rich membranes 121, which is equivalent to inhaling oxygen into the oxygen-rich gas collecting chamber 122 from both sides of the oxygen-rich membrane component 12 at the same time, thereby expanding the oxygen permeability area and improving the oxygen extraction efficiency.

[0090] Furthermore, the oxygen-enriching membrane assembly 12 may further include a mounting frame for supporting the two oxygen-enriching membranes 121 , and the two oxygen-enriching membranes 121 are supported inside the mounting frame.

[0091] Of course, in other embodiments, the oxygen-enriching membrane assembly 12 may include only one oxygen-enriching membrane 121. In these embodiments, the oxygen-enriching membrane assembly 12 also includes a mounting frame for supporting the oxygen-enriching membrane 121 and a plate for sealing one side opening of the mounting frame. The oxygen-enriching membrane 121 covers the other side opening of the mounting frame. Thus, a relatively closed oxygen-enriched gas collection chamber can also be defined between the oxygen-enriching membrane 121, the mounting frame, and the plate.

[0092] In some embodiments, the oxygen-enriched membrane assembly 12 extends obliquely upward from a first side of the cover 16 toward a second side of the cover 16, with the first side of the cover 16 and the second side of the cover 16 being disposed opposite each other. The oxygen-enriched membrane assembly 12 is spaced apart from the cover 16 on the second side of the cover 16, and the exhaust line 165 is in communication with the oxygen-enriched gas collection chamber 122 at an end of the oxygen-enriched membrane assembly 12 adjacent to the second side of the cover 16.

[0093] The oxygen-enriched membrane assembly 12 is tilted, which can extend the length of the oxygen-enriched membrane assembly 12 within a limited space, thereby increasing the oxygen permeability area of ​​the oxygen-enriched membrane 121 and further improving the oxygen extraction efficiency.

[0094] In addition, the oxygen-enriched membrane assembly 12 needs to be connected to the exhaust pipe 165. After the oxygen-enriched membrane assembly 12 is tilted, the present application can form a certain gap between the oxygen-enriched membrane assembly 12 and the cover body 16, and the exhaust pipe 165 is connected to the end of the second side of the oxygen-enriched membrane assembly 12 adjacent to the cover body 16. On the premise of ensuring sufficient oxygen permeability, sufficient space is provided for the bending and reversing of the exhaust pipe 165, avoiding the problem of excessive reversal of the exhaust pipe 165 causing deformation of the exhaust pipe 165 and reducing the flow area, thereby ensuring the smooth flow of the exhaust path.

[0095] In some embodiments, the fresh-keeping box 11 is provided with an air extraction hole 161 communicating with the fresh-keeping space 111. The air delivery component 14 includes an air delivery pipe 141 and a self-sealing mechanism 142.

[0096] Specifically, the air extraction device 10b is connected to the self-sealing mechanism 142, and the air delivery pipe 141 is detachably connected between the self-sealing mechanism 142 and the air extraction hole 161. It will be understood that when the air delivery pipe 141 is connected between the self-sealing mechanism 142 and the air extraction hole 161, the air delivery assembly 14 is in its first state; when the air delivery pipe 141 is separated from the self-sealing mechanism 142 and the air extraction hole 161, the air delivery assembly 14 is in its second state.

[0097] Furthermore, the self-sealing mechanism 142 is configured to connect the gas pipe 141 and the gas extraction device 10b when the gas pipe 141 is connected between the self-sealing mechanism 142 and the gas extraction hole 161, and to block the gas extraction path of the gas extraction device 10b at the self-sealing mechanism 142 when the gas pipe 141 is separated from the self-sealing mechanism 142 and the gas extraction hole 161.

[0098] When the air supply pipe 141 is connected between the self-sealing mechanism 142 and the air extraction hole 161, the air extraction device 10b is connected to the air extraction hole 161 through the self-sealing mechanism 142 and the air supply pipe 141, and is further connected to the fresh-keeping space 111. When the air supply pipe 141 is separated from the self-sealing mechanism 142 and the air extraction hole 161, the air extraction path of the air extraction device 10b at the self-sealing mechanism 142 is blocked, the air extraction device 10b is disconnected from the air supply pipe 141, and the air extraction device 10b is no longer connected to the external space of the fresh-keeping device 10.

[0099] 6 is a schematic exploded view of a gas delivery assembly in a cross-sectional state according to an embodiment of the present application. In some embodiments, the self-sealing mechanism 142 may include a support frame 1421 and an elastic sealing structure 1422 .

[0100] An air delivery cavity 14211 is defined within the support frame 1421 , and a connecting hole 14213 is formed on one of the side walls 14212 defining the air delivery cavity 14211 .

[0101] The elastic sealing structure 1422 is disposed in the gas delivery cavity 14211 and is configured to be operably switched between a closed state for blocking the connection hole 14213 and an open state for opening the connection hole 14213 .

[0102] Furthermore, the air extraction device 10b is in communication with the air delivery cavity 14211. One end of the air delivery tube 141 is detachably inserted into the connecting hole 14213. When the air delivery tube 141 is inserted into the connecting hole 14213, the elastic sealing structure 1422 is caused to switch to its open state, thereby allowing the air delivery tube 141 to communicate with the air delivery cavity 14211 and thus with the air extraction device 10b through the connecting hole 14213. After the air delivery tube 141 is removed from the connecting hole 14213, the elastic sealing structure 1422 is restored to its closed state, thereby sealing the connecting hole 14213 and thereby blocking the communication between the air delivery cavity 14211 and any space outside the self-sealing mechanism 142.

[0103] The present application provides a support frame 1421, provides a connecting hole 14213 on the support frame 1421, and forms an air delivery cavity 14211 in the support frame 1421, etc., so that the air delivery pipe 141 can be connected to the self-sealing mechanism 142 by being plugged into the connecting hole 14213, which is very easy to operate; and allows the elastic sealing structure 1422 to be hidden inside the air delivery cavity 14211, which is not easy to interfere with or affect other structures, and has high structural stability, and simplifies the appearance, thereby improving the neatness of the appearance.

[0104] It is understandable that when there are multiple fresh-keeping units 10a, the support frames 1421 of the multiple fresh-keeping units 10a can be fixedly connected together or integrally formed to facilitate overall assembly.

[0105] In some embodiments, the air extraction hole 161 is provided at the top of the fresh-keeping box 11, and the side wall 14212 where the connecting hole 14213 is located extends vertically toward the fresh-keeping box 11. That is, the plane where the air extraction hole 161 is located and the plane where the connecting hole 14213 is located are substantially perpendicular to each other.

[0106] Furthermore, the gas pipe 141 includes a vertical pipe section 1411 extending vertically and connected to the air extraction hole 161, and a horizontal pipe section 1412 extending horizontally and connected to the connecting hole 14213. In other words, the gas pipe 141 is generally L-shaped, so that its ends are connected to the air extraction hole 161 and the connecting hole 14213, respectively. It should be noted that the extension directions of the vertical pipe section 1411 and the horizontal pipe section 1412 herein refer to the state in which the ends of the gas pipe 141 are connected to the air extraction hole 161 and the connecting hole 14213, respectively.

[0107] In some embodiments, a horizontally extending shaft 14215 is provided on support frame 1421, and gas pipe 141 is configured to operably rotate vertically about shaft 14215. Furthermore, shaft 14215 extends through horizontal pipe section 1412 in a direction perpendicular to the horizontal pipe section 1412 and is offset upward from the vertical center of horizontal pipe section 1412. In other words, the shaft of gas pipe 141 is eccentric.

[0108] In the present application, the rotating shaft of the air pipe 141 is specially set to the above-mentioned eccentric shaft, and the state of the air pipe 141 can be switched by rotating the air pipe 141, and the air pipe 141 does not cause structural interference with the exhaust hole 161 and the connecting hole 14213. The state switching operation of the air pipe 141 is simple, and the air pipe 141 will not be completely separated from the preservation device 10, which facilitates the placement of the air pipe 141.

[0109] Specifically, when the two ends of the gas pipe 141 are respectively connected to the air extraction hole 161 and the connecting hole 14213, if the gas pipe 141 needs to be removed and separated from the air extraction hole 161 and the connecting hole 14213, the gas pipe 141 only needs to be rotated upward. The gas pipe 141 can be rotated to a retracted state in which the horizontal pipe section 1412 is placed vertically and the vertical pipe section 1411 is placed horizontally. If the two ends of the gas pipe 141 need to be reconnected to the air extraction hole 161 and the connecting hole 14213 respectively, the gas pipe 141 only needs to be rotated in the opposite direction. Because the rotation axis of the gas pipe 141 is not located at its center, the gas pipe 141 can cleverly avoid the hole walls of the air extraction hole 161 and the connecting hole 14213 when rotating, ensuring smooth rotation of the gas pipe 141.

[0110] In some embodiments, the elastic sealing structure 1422 may include a hollow column 14221 , an insertion rod 14222 , and an elastic member 14223 .

[0111] Hollow column 14221 is positioned within gas delivery cavity 14211 on the side opposite connecting hole 14213 and has an opening facing the side where connecting hole 14213 is located. One end of insertion rod 14222 is inserted into hollow column 14221 through the opening of hollow column 14221. The other end of insertion rod 14222 is provided with a sealing plate 14224 located outside hollow column 14221. The plane of sealing plate 14224 is parallel to the plane of connecting hole 14213. Elastic member 14223 is positioned between the bottom of hollow column 14221 and insertion rod 14222.

[0112] When the gas delivery assembly 14 is in its first state, one end of the gas delivery pipe 141 is inserted into the connecting hole 14213 from the outside of the gas delivery cavity 14211 and presses the sealing plate 14224 in a direction away from the connecting hole 14213 to cause the sealing plate 14224 and the insertion rod 14222 to move in a direction away from the connecting hole 14213, thereby compressing the elastic member 14223 and forming a gap between the sealing plate 14224 and the connecting hole 14213, thereby allowing the gas delivery pipe 141 to communicate with the gas delivery cavity 14211 through the gap.

[0113] When the gas delivery assembly 14 is in its second state, one end of the gas delivery pipe 141 extends outward from the connecting hole 14213 to release the sealing plate 14224, so that the sealing plate 14224 moves toward the connecting hole 14213 under the action of the elastic deformation recovery force of the elastic member 14223 until the sealing plate 14224 is attached to the side wall where the connecting hole 14213 is located and covers the connecting hole 14213.

[0114] Furthermore, a first sealing ring 1423 is provided on the periphery of the sealing plate 14224 facing the connecting hole 14213. When the gas delivery assembly 14 is in its second state, the first sealing ring 1423 is clamped between the sealing plate 14224 and the side wall 14212 around the connecting hole 14213 to improve the sealing effect.

[0115] Furthermore, the outer tube wall of the gas pipe 141 protrudes outward and extends to have a flange 1413 adjacent to the other end of the gas pipe 141. A second sealing ring 1414 is sleeved on the gas pipe 141. The second sealing ring 1414 is located on the side of the flange 1413 facing the other end of the gas pipe 141, so that when the gas delivery component 14 is in its first state, the second sealing ring 1414 is clamped between the flange 1413 and the side wall 14212 around the connecting hole 14213 to improve the sealing effect.

[0116] In some embodiments, the fresh-keeping device 10 further includes a base 17 , and the at least one fresh-keeping unit 10 a is supported on the base 17 , so as to integrally and stably support the at least one fresh-keeping unit 10 a .

[0117] In some embodiments, the air extraction device 10b can be installed outside the fresh-keeping unit 10a. The air extraction device 10b generates a certain amount of noise and vibration during operation. Therefore, the present application places the air extraction device 10b externally. Depending on the actual situation, the air extraction device 10b can be flexibly installed in other suitable locations in the refrigerator, such as the compressor compartment or other locations, to prevent the air extraction device 10b from causing the fresh-keeping unit 10a to vibrate and reduce the noise that the user can feel.

[0118] The present application also provides a refrigerator. Figure 7 is a schematic structural diagram of a refrigerator according to one embodiment of the present application. Refrigerator 1 includes a housing 20 and at least one door 30. Housing 20 defines at least one storage compartment, and at least one door 30 is used to open and close the at least one storage compartment.

[0119] In particular, the refrigerator 100 further includes the fresh-keeping device 10 described in any of the above embodiments, and the fresh-keeping device 10 is arranged on the box body 20 or one of the doors 30.

[0120] Figure 8 is a schematic structural diagram of a door according to one embodiment of the present application. In some embodiments, the fresh-keeping device 10 can be disposed inside the door 30 and exposed to the outside of the door 30. This facilitates the user in placing items in and out of the fresh-keeping device 10 when the door 30 is open. Furthermore, when the door 30 is closed, the cooling airflow within the cabinet 20 can be used to cool the fresh-keeping device 10, ensuring a lower temperature within the fresh-keeping device 10 and better preserving the food therein.

[0121] The present application also provides a fresh-keeping device for a refrigerator. FIG9 is a schematic structural diagram of a fresh-keeping device for a refrigerator according to an embodiment of the present application. FIG10 to FIG12 are schematic cross-sectional views of the fresh-keeping device according to an embodiment of the present application in different storage states. The section lines in FIG10 to FIG12 roughly represent the food in the fresh-keeping device, and the solid black dots in FIG10 to FIG12 roughly represent light spots. Referring to FIG9 to FIG12, the fresh-keeping device 210 for a refrigerator of the present application can generally include a fresh-keeping box 211, and the interior of the fresh-keeping box 211 defines a fresh-keeping space 2111 for storing items. In particular, the fresh-keeping device 210 also includes a light-emitting device 212 and a reflective device 213 disposed on the outside of the fresh-keeping box 211.

[0122] The fresh-keeping box 211 is transparent or translucent, and one of the side portions of the fresh-keeping box 211 has a plurality of transparent reflective portions 2112 arranged at intervals along the height direction of the fresh-keeping box 211. Each transparent reflective portion 2112 is configured to reflect the received light toward the outside of the fresh-keeping box 211 when there is an obstruction on the inner side thereof facing the fresh-keeping space 2111, and to allow the light to pass through and enter the fresh-keeping space 2111 when there is no obstruction on the inner side thereof facing the fresh-keeping space 2111, thereby forming a light spot at a position of the fresh-keeping box 211 at the same height as the transparent reflective portion.

[0123] The light emitting device 212 is configured to emit light toward the bottom transparent reflective portion 2112. Specifically, the light emitting device 212 can be located outside the fresh-keeping box 211 at the same height as the bottom transparent reflective portion 2112, so as to emit light toward the bottom transparent reflective portion 2112.

[0124] The reflecting device 213 is configured to receive light reflected by the other transparent reflecting portions 2112 except the uppermost transparent reflecting portion 2112 and reflect the light to another transparent reflecting portion 2112 adjacent to and above the other transparent reflecting portion 2112 .

[0125] When the light-emitting device 212 emits light toward the bottommost transparent reflective portion 2112, if food is present on the inner side of the bottommost transparent reflective portion 2112 facing the fresh-keeping space 2111 (see Figures 11 and 12), the food can block the light emitted from the bottommost transparent reflective portion 2112, causing the light to be reflected toward the reflective device 213. The reflective device 213 receives the light reflected from the bottommost transparent reflective portion 2112 and reflects it toward the second transparent reflective portion 2112 located above it. Similarly, if food is also present on the inner side of the second transparent reflective portion 2112 located above it, facing the fresh-keeping space (see Figure 12), the food can block the light emitted from the second transparent reflective portion 2112, causing the light to be reflected toward the reflective device 213. The reflective device 213 again receives the light reflected from the second transparent reflective portion 2112 and reflects it, and so on.

[0126] If there is no food on the inner side of the bottom transparent reflective portion 2112 facing the fresh-keeping space 2111 (see FIG10 ), that is, there is no obstruction to block the light irradiating the bottom transparent reflective portion 2112, the light passes through the bottom transparent reflective portion 2112 and enters the fresh-keeping space 2111, forming a light spot at a position of the fresh-keeping box 211 at the same height as the bottom transparent reflective portion 2112. Since most of the light irradiating the bottom transparent reflective portion 2112 passes through the bottom transparent reflective portion 2112 and enters the fresh-keeping box 211, very little light is reflected by the bottom transparent reflective portion 2112. Therefore, no light spot is formed at other positions of the fresh-keeping box 211 at the same height as the other transparent reflective portions 2112 above the bottom transparent reflective portion 2112. In other words, a light spot is formed only at the lowest position of the fresh-keeping box 211 where there is no food blocking the light.

[0127] Similarly, if food is present on the inner side of the lowest transparent reflective portion 2112 facing the fresh-keeping space 2111, and no food is present on the inner side of the second transparent reflective portion 2112 (see Figure 11), a light spot will only be formed at a position on the fresh-keeping box 211 at the same height as the second transparent reflective portion 2112. In other words, a light spot will be formed at a position on the fresh-keeping box 211 at the same height as the lowest transparent reflective portion 2112, where no food is obstructing the inner side. Thus, the multiple transparent reflective portions 2112 form multiple positions for indicating the usable volume of the fresh-keeping box 211.

[0128] The fresh-keeping device 210 of the present application not only includes a fresh-keeping box 211 defining a fresh-keeping space 2111, but also includes a light-emitting device 212 and a reflective device 213 specifically disposed on the exterior of the fresh-keeping box 211. The fresh-keeping box 211 is configured to be transparent or translucent to allow light to pass through. One of the sides of the fresh-keeping box 211 has multiple transparent reflective portions 2112 spaced apart along the height of the box. The coordination between the multiple transparent reflective portions 2112, the light-emitting device 212, and the reflective device 213 creates a light spot at the lowest point of the fresh-keeping box 211, where no food is obstructed. This light spot indicates the amount of food stored within the fresh-keeping box 211. Because light spots are easily observable to users, they can simply and effectively inform users of the storage capacity and approximate usable volume within the fresh-keeping box 211. Furthermore, the light spots are uniquely positioned at a specific height, preventing glare from excessive or large areas.

[0129] Moreover, the present application only needs to provide one light-emitting device 212 as a light source by providing a transparent reflective portion 2112 that can selectively transmit or reflect light under different circumstances, and a reflective device 213 for reflecting light between different transparent reflective portions 2112. The very clever and simple structural design reduces the number of light-emitting devices 212, simplifies the structure of the fresh-keeping device 210, and reduces the cost and energy consumption of the fresh-keeping device 10.

[0130] Specifically, the specific shape of the light spot formed on the fresh-keeping box 211 depends on the type of the light-emitting device 212. For example, when the light-emitting device 212 is an electric light source, the light spot formed on the fresh-keeping box 211 is also a point-shaped light spot; when the light-emitting device 212 is a linear light source, the light spot formed on the fresh-keeping box 211 is a linear light spot.

[0131] It should be noted that the light spots mentioned in this application are all visible light spots that can be seen by the user with the naked eye.

[0132] In some embodiments, the reflective device 213 includes a plurality of reflective plates 2131 spaced apart along the height of the food storage box 211. The plurality of reflective plates 2131 arranged sequentially from top to bottom are matched one-to-one with the plurality of transparent reflective portions 2112 arranged sequentially from top to bottom. That is, the number of reflective plates 2131 is the same as the number of transparent reflective portions 2112, and the nth reflective plate 2131 from top to bottom is matched with the nth transparent reflective portion 2112 from top to bottom. For example, the first reflective plate 2131 from top to bottom is matched with the first transparent reflective portion 2112 from top to bottom, the second reflective plate 2131 from top to bottom is matched with the second transparent reflective portion 2112 from top to bottom, and so on.

[0133] Furthermore, each of the reflective plates 2131 except the topmost reflective plate 2131 is configured to receive light reflected from its corresponding transparent reflective portion 2112 and reflect it to another transparent reflective portion 2112 located adjacent to and above the corresponding transparent reflective portion. For example, the second reflective plate 2131 from top to bottom receives light reflected from the second transparent reflective portion 2112 from top to bottom and reflects it to the first reflective plate 2131 from top to bottom; for another example, the first reflective plate 2131 from bottom to top receives light reflected from the first transparent reflective portion 2112 from bottom to top and reflects it to the second reflective plate 2131 from bottom to top.

[0134] Furthermore, the uppermost reflective plate 2131 is configured to receive light reflected by the uppermost transparent reflective portion 2112 and reflect the light to a preset position on the food storage box 211 above the uppermost transparent reflective portion 2112. It is understood that the specific position of the preset position on the food storage box 211 is closely related to the tilt of the uppermost reflective plate 2131.

[0135] Since the fresh-keeping box 211 is transparent or translucent as a whole, light can also pass through the preset position of the fresh-keeping box 211. When there is food inside the fresh-keeping box 211 at the preset position, the food can block the light reflected to the preset position, and at this time, no light spot will be formed at any position of the fresh-keeping box 211. When there is food inside the uppermost transparent reflective portion 2112 and there is no food inside the fresh-keeping box 211 at the preset position, the light reflected to the preset position can pass through the fresh-keeping box 211, thereby forming a light spot at a position of the fresh-keeping box 211 at the same height as the preset position.

[0136] It can be seen that the preset position is a position where the used storage volume of the fresh-keeping box 211 is the largest and the available volume is the smallest.

[0137] The present application achieves multiple reflection and reversal of light through the clever coordination of multiple reflective plates 2131 and multiple transparent reflective parts 2112, ensuring that the light emitted by one light-emitting device 212 can be emitted to multiple transparent reflective parts 2112, thereby achieving the purpose of saving the number of light-emitting devices 212.

[0138] In some embodiments, the postures of the multiple reflective plates 2131 are the same.

[0139] In other embodiments, the postures of the multiple reflective plates 2131 are different.

[0140] In some other embodiments, the postures of the multiple reflective plates 2131 are different.

[0141] The posture of the reflector 2131 includes the tilt direction and tilt angle of the reflector 2131. Since the transparent reflective portion 2112 and the reflector 2131 affect each other, the posture of each reflector 2131 can be designed and adjusted according to the specific structure of the corresponding transparent reflective portion 2112, as long as the light reflection path requirements are met. There is no restriction on whether the postures of multiple reflectors 2131 must be the same or different.

[0142] In some embodiments, the transparent reflective portion 2112 is a cutout formed on the side of the fresh-keeping box 211 and recessed into the interior of the fresh-keeping box 211. Furthermore, the transparent reflective portion 2112 has a transparent reflective surface 21121 that slopes upward from the lateral outer surface of the fresh-keeping box 211 toward the interior of the fresh-keeping box 211, so that light is received and reflected through the transparent reflective surface 21121.

[0143] The present application receives and reflects light through an inclined transparent reflective surface 21121, so that the light reflected by the transparent reflective surface 21121 is directed obliquely upwards to the fresh-keeping box 211, thereby facilitating the reflection device 213 to reflect light toward other transparent reflective portions 2112 or preset positions above the transparent reflective portion 2112, which is beneficial for the light to be transmitted upwards step by step, thereby accurately detecting the used volume in the fresh-keeping space 2111.

[0144] In some embodiments, the transparent reflective portion 2112 also has a yield surface 21122 that tilts from the top edge of the transparent reflective surface 21121 toward the outside of the fresh-keeping box 211 from bottom to top, so as to form a yield space 21123 below the yield surface 21122, thereby avoiding the light reflected by the transparent reflective portion 2112 through the yield space 21123.

[0145] In the present application, the yield surface 21122 is set to be inclined upward, so that a larger yield space 21123 can be obtained below the yield surface 21122, thereby ensuring that the light reflected by the transparent reflective surface 21121 will not be blocked by the yield surface 21122.

[0146] In some embodiments, a semi-permeable film 21124 is attached to the inner side or the outer side of each transparent reflective surface 21121. The semi-permeable film 21124 can make the light spot formed on the fresh-keeping box 211 clearer and more obvious, so as to facilitate user observation.

[0147] In some embodiments, the other side of the fresh-keeping box 211, opposite to the one of the side portions, also has a plurality of transparent reflective portions 2112 spaced apart along the height direction of the fresh-keeping box 211. The plurality of transparent reflective portions 2112 on one side of the fresh-keeping box 211 are symmetrically arranged one by one with the plurality of transparent reflective portions 2112 on the other side of the fresh-keeping box 211.

[0148] That is, the transparent reflective portion 2112 formed on one side and the other side of the fresh-keeping box 211 are identical. When installing the fresh-keeping box 211, one side of the fresh-keeping box 211 can be positioned opposite the light-emitting device 212 and the reflective device 213, or the other side of the fresh-keeping box 211 can be positioned opposite the light-emitting device 212 and the reflective device 213. This improves the installation flexibility of the fresh-keeping box 211 and effectively avoids the error message given to the user by the inability to effectively form a light spot due to installation problems of the fresh-keeping box 211.

[0149] 13 is a schematic cross-sectional view of a fresh-keeping box according to an embodiment of the present application. In some embodiments, the fresh-keeping device 210 further includes an oxygen-enriching membrane assembly 214 and an air extraction device 215.

[0150] Figure 14 is a schematic cross-sectional view of an oxygen-enriching membrane assembly according to one embodiment of the present application. Specifically, oxygen-enriching membrane assembly 214 comprises at least one oxygen-enriching membrane 2141. Oxygen-enriching membrane 2141 is configured such that oxygen in the air on its first side passes through membrane 2141 to a greater extent than nitrogen in the air therein, flowing toward its second side. The first side of oxygen-enriching membrane 2141 is in communication with fresh-keeping space 2111.

[0151] Specifically, the oxygen-enriched membrane 2141 may be an oxygen-permeable membrane that allows only oxygen and moisture in the air to pass through it, but does not allow nitrogen in the air to pass through it. Furthermore, oxygen and moisture can only pass through the oxygen-enriched membrane 2141 in one direction, from the first side of the oxygen-enriched membrane 2141 to the second side of the oxygen-enriched membrane 2141.

[0152] The exhaust device 215 is communicated with the space where the second side of the oxygen-enriching membrane 2141 is located, so as to controllably extract the gas in the space where the second side of the oxygen-enriching membrane 2141 is located, thereby forming a negative pressure in the fresh-keeping space 2111 .

[0153] In particular, the fresh-keeping box 211 is provided with a pressure balancing hole 2113 connecting the fresh-keeping space 2111 and the space outside the fresh-keeping box 211, so that when negative pressure is formed in the fresh-keeping space 2111, the air in the space outside the fresh-keeping box 211 enters the fresh-keeping space 2111 through the pressure balancing hole 2113.

[0154] When the exhaust device 215 is activated, it draws gas from the space located on the second side of the oxygen-enriched membrane 2141, creating a negative pressure therein. Under this negative pressure, oxygen in the fresh-keeping space 2111, which is connected to the first side of the oxygen-enriched membrane 2141, passes through the oxygen-enriched membrane 2141 and flows into the space located on the second side of the oxygen-enriched membrane 2141, where it is then extracted by the exhaust device 215. Consequently, a certain negative pressure is formed in the fresh-keeping space 2111. Under this negative pressure, air from the space outside the fresh-keeping box 211 can enter the fresh-keeping space 2111 through the pressure balancing hole 2113, rapidly balancing the pressure within the fresh-keeping space 2111 and maintaining a dynamic pressure balance between the fresh-keeping space 2111 and the space outside the fresh-keeping box 211.

[0155] It is understood that a certain amount of oxygen is extracted from the fresh-keeping space 2111 by the exhaust device 215, and the same amount of air enters the fresh-keeping space 2111 through the pressure balance hole 2113. Although the total amount of gas in the fresh-keeping space 2111 remains almost unchanged, the oxygen content in the air is only about 21%, far less than the amount of oxygen extracted by the exhaust device 215. Therefore, during the operation of the exhaust device 215, the oxygen content in the fresh-keeping space 2111 gradually decreases.

[0156] When the exhaust device 215 stops running, on the one hand, more oxygen in the fresh-keeping space 2111 is extracted and is in a low-oxygen state with a low oxygen content; on the other hand, there is almost no pressure difference between the fresh-keeping space 2111 and the external space of the fresh-keeping box 211. Therefore, there is almost no air flow between the fresh-keeping space 2111 and the external space of the fresh-keeping box 211, and the low-oxygen state can be maintained in the fresh-keeping space 2111 for a long time, which is beneficial to the long-term preservation of food in the fresh-keeping space 2111, extending the fresh-keeping period of food, and effectively reducing the risk of odor contamination inside and outside the fresh-keeping device 210.

[0157] Furthermore, during the vacuuming process, airflow is maintained between the fresh-keeping space 2111 and the external space in the fresh-keeping device 210 of the present application, eliminating the need for a completely sealed fresh-keeping device, thereby reducing the design requirements for its sealing performance. Furthermore, since a negative pressure state is not formed within the fresh-keeping space 2111, no matter how the user accesses the food, there are no safety hazards and no moisture loss from the food within the fresh-keeping space 2111, further improving the fresh-keeping effect.

[0158] It can be seen that the present application forms a low-oxygen environment in the fresh-keeping space 2111 by opening a simple pressure balance hole 2113 on the fresh-keeping device 210 without a pressure difference, thereby achieving the above-mentioned many beneficial technical effects, and the structural design is very ingenious.

[0159] The applicant has realized that in order to better achieve the preservation effect of the preservation device 210 and to extend the preservation time of the preservation device 210 as much as possible, the diameter of the pressure balance hole 2113 cannot be too large. For example, the diameter of the pressure balance hole 2113 is not greater than 10 mm.

[0160] In some embodiments, the fresh-keeping box 210 includes a box body 211a and a cover 2118 covering the box body 211a . The fresh-keeping space 2111 is formed in the box body 211a , and the pressure balance hole 2113 is opened on the cover 2118 .

[0161] Specifically, the box body 211a may include an outer box 2115, a support structure 2116 disposed within the outer box 2115, and an inner box 2117 disposed within the outer box 2115 and supported on the support structure 2116. A fresh-keeping space 2111 is formed within the inner box 2117. The tops of the inner box 2117 and the outer box 2115 are both open, allowing users to easily place and take food into and out of the fresh-keeping space 2111.

[0162] Figure 15 is a schematic cross-sectional view of a cover according to one embodiment of the present application. Furthermore, cover 2118 includes an inner cover 21181 and an outer cover 21182 covering the outer side of inner cover 21181. Pressure balance hole 2113 includes an inner hole 21131 extending through the thickness of inner cover 21181 and an outer hole 21132 extending through the thickness of outer cover 21182. Inner hole 21131 and outer hole 21132 are in communication.

[0163] Furthermore, a pressure-relief space 21133 is formed between the inner cover 21181 and the outer cover 21182. The inner hole 21131 communicates with the outer hole 21132 through the pressure-relief space 21133. The pressure-relief space 21133 prolongs the flow path of air from the external space into the fresh-keeping space 2111. After the exhaust device 215 stops operating, it is difficult for the air in the external space to exchange air with the fresh-keeping space 2111. Therefore, the low-oxygen environment in the fresh-keeping space 2111 is maintained longer, and the fresh-keeping effect is better.

[0164] It is understandable that due to the presence of the pressure balance hole 2113, there will inevitably be a weak airflow exchange between the fresh-keeping space 2111 and the external space of the fresh-keeping device 210. After a sufficiently long time (for example, several days), the oxygen content in the fresh-keeping space 2111 increases. Therefore, the exhaust device 215 can periodically start the exhaust operation at preset time intervals. It should be noted that since there is no pressure difference between the fresh-keeping space 2111 and the external space of the fresh-keeping device 210, the airflow exchange between the two is very weak. Therefore, the duration of the two operation intervals of the exhaust device 215 of the present application is much longer than the duration of the operation interval of the exhaust device in the prior art when a negative pressure is formed in the fresh-keeping space by using an exhaust device.

[0165] In some embodiments, the oxygen-enriched membrane assembly 214 is disposed inside the fresh-keeping box 211 so that the first side of the oxygen-enriched membrane 2141 is connected to the fresh-keeping space 2111 in the fresh-keeping box 211, shortening the communication path between the two and improving the efficiency of oxygen extraction.

[0166] Furthermore, the air extraction device 215 is arranged outside the fresh-keeping box 211. When the air extraction device 215 is in operation, it will generate certain noise and vibration. Therefore, the air extraction device 215 is externally arranged in the present application. The air extraction device 215 can be flexibly arranged in other suitable positions of the refrigerator according to actual conditions, such as the compressor compartment, to prevent the air extraction device 215 from causing the fresh-keeping box 211 to vibrate and reduce the noise that the user can feel.

[0167] Furthermore, an exhaust hole 2119 is provided on the fresh-keeping box 211 , so that the exhaust device 215 can extract the gas in the space on the second side of the oxygen-enriched membrane 2141 through the exhaust hole 2119 .

[0168] In some embodiments, the interior of the fresh food box 211 further defines a buffer space 2114, which is in communication with the fresh food space 2111. The oxygen enrichment membrane assembly 214 is disposed in the buffer space 2114, so that the first side of the oxygen enrichment membrane 2141 is indirectly in communication with the fresh food space 2111 through the buffer space 2114.

[0169] The present application additionally forms a buffer space 2114 in the fresh-keeping box 211, and arranges the oxygen-enriched membrane component 214 in the buffer space 2114, rather than directly arranging the oxygen-enriched membrane component 214 in the fresh-keeping space 2111. On the one hand, it can prevent the food in the fresh-keeping space 2111 from contacting the oxygen-enriched membrane component 214 and affecting the oxygen permeability of the oxygen-enriched membrane component 214. On the other hand, it also makes it convenient for users to take and put food in the fresh-keeping space 2111 without being affected by the oxygen-enriched membrane component 214.

[0170] Furthermore, the inner box 2117 and the outer box 2115 are spaced apart to allow gas to flow therebetween. The support structure 2116 may be provided with a through hole, through which the buffer space 2114 communicates with the gap between the outer box 2115 and the inner box 2117, and further communicates with the fresh-keeping space 2111 in the inner box 2117.

[0171] In some embodiments, the oxygen-enriched membrane assembly 214 includes two oxygen-enriched membranes 2141 arranged in parallel and spaced apart. The first sides of the two oxygen-enriched membranes 2141 are arranged opposite to each other and are both exposed to the buffer space 2114. That is, the first sides of the two oxygen-enriched membranes 2141 are indirectly connected to the fresh-keeping space 2111 through the buffer space 2114. The second sides of the two oxygen-enriched membranes 2141 are arranged opposite to each other to form an oxygen-enriched gas collection chamber 2142 between the two oxygen-enriched membranes 2141. The exhaust device 215 is connected to the oxygen-enriched gas collection chamber 2142 through an exhaust pipe 216 passing through the exhaust hole 2119.

[0172] When the exhaust device 215 is running, the gas in the oxygen-rich gas collecting chamber 2142 is sucked through the exhaust pipe 216, and a negative pressure is formed in the oxygen-rich gas collecting chamber 2142. Under the action of this negative pressure, the oxygen in the buffer space 2114 can flow to the oxygen-rich gas collecting chamber 2142 simultaneously through the two oxygen-rich membranes 2141, which is equivalent to sucking oxygen into the oxygen-rich gas collecting chamber 2142 from both sides of the oxygen-rich membrane assembly 214 at the same time, thereby expanding the oxygen permeability area and improving the oxygen extraction efficiency.

[0173] Furthermore, the oxygen-enriching membrane assembly 214 may further include a mounting frame for supporting the two oxygen-enriching membranes 2141 , and the two oxygen-enriching membranes 2141 are supported inside the mounting frame.

[0174] Furthermore, the oxygen-enriching membrane assembly 214 extends obliquely upward from the first side of the fresh-keeping box 211 toward the second side of the fresh-keeping box 211, with the first side of the fresh-keeping box 211 and the second side of the fresh-keeping box 211 being disposed opposite each other. The oxygen-enriching membrane assembly 214 is spaced apart from the fresh-keeping box 211 on the second side of the fresh-keeping box 211, and the exhaust line 216 is connected to the oxygen-enriched gas collection chamber 2142 at the end of the oxygen-enriching membrane assembly 214 adjacent to the second side of the fresh-keeping box 211.

[0175] The oxygen-enriched membrane assembly 214 is tilted, which can extend the length of the oxygen-enriched membrane assembly 214 within a limited space, thereby increasing the oxygen permeability area of ​​the oxygen-enriched membrane 2141 and further improving the oxygen extraction efficiency.

[0176] In addition, the oxygen-enriched membrane assembly 214 needs to be connected to the exhaust pipe 216. After the oxygen-enriched membrane assembly 214 is tilted, a certain distance can be formed between the oxygen-enriched membrane assembly 214 and the fresh-keeping box 211, and the exhaust pipe 216 is connected to the end of the oxygen-enriched membrane assembly 214 on the second side of the fresh-keeping box 211, which ensures sufficient oxygen permeability. On the premise of ensuring sufficient oxygen permeability area, sufficient space is provided for the bending and reversing of the exhaust pipe 216, avoiding the problem of excessive reversal of the exhaust pipe 216 causing deformation of the exhaust pipe 216 and reducing the flow area, thereby ensuring the smooth flow of the exhaust passage.

[0177] In some embodiments, the fresh-keeping device 210 further includes a base 217 , and the fresh-keeping box 211 is supported on the base 217 to stably support the fresh-keeping box 211 .

[0178] Furthermore, a through hole 2171 is provided on the base 217 for the air extraction pipeline 216 to pass through.

[0179] Specifically, there may be multiple fresh-keeping boxes 211 , and each fresh-keeping box 211 is correspondingly provided with a light-emitting device 212 and a reflective device 213 . The multiple fresh-keeping boxes 211 are supported on the base 217 together.

[0180] In the description of the present embodiment, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any appropriate manner in any one or more embodiments or examples.

[0181] Furthermore, the terms “first,” “second,” and “third” are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0182] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0183] Those skilled in the art should understand that the terms "upper", "lower", "front", "back", "top", "bottom", etc. used in the embodiments of the present application to indicate orientation or positional relationships are based on the actual usage status of the fresh-keeping device and the refrigerator. These terms are only used to facilitate the description and understanding of the technical solutions of the present application, and do not indicate or imply that the device or device referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present application.

[0184] Furthermore, it should be noted that, in the description of this application, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0185] At this point, those skilled in the art should recognize that, although multiple exemplary embodiments of the present application have been shown and described in detail herein, many other variations or modifications that are consistent with the principles of the present application can be directly determined or derived from the contents disclosed herein without departing from the spirit and scope of the present application. Therefore, the scope of the present application should be understood and deemed to cover all such other variations or modifications.

Claims

1. A fresh-keeping device for a refrigerator, characterized in that: It includes an air extraction device and at least one fresh-keeping unit, wherein Each of the fresh-keeping units comprises: A fresh-keeping box, which defines a fresh-keeping space for storing items; and The gas delivery component is detachably connected between the air extraction device and the fresh-keeping box, so as to connect the air extraction device and the fresh-keeping space when the air extraction device and the fresh-keeping box are in a first state, and to form a self-seal when the air extraction device and the fresh-keeping box are in a second state separated from the fresh-keeping box, thereby preventing air from flowing therethrough; and the fresh-keeping device is configured to suck the gas in the fresh-keeping space connected thereto through the air extraction device, so as to form a low-oxygen environment in the fresh-keeping space with an oxygen content lower than that in the air.

2. The fresh-keeping device according to claim 1, characterized in that: There are multiple fresh-keeping units, and the multiple fresh-keeping units are independently arranged.

3. The fresh-keeping device according to claim 1, characterized in that: Each of the fresh-keeping units also includes: The oxygen-enriched membrane component has at least one oxygen-enriched membrane, and the oxygen-enriched membrane is configured so that the oxygen in the air located on the first side thereof passes through the oxygen-enriched membrane to flow to the second side of the oxygen-enriched membrane in greater amounts than the nitrogen therein; wherein the first side of the oxygen-enriched membrane is connected to the fresh-keeping space; the second side of the oxygen-enriched membrane is connected to the exhaust device when the gas transmission component is in the first state, so that the gas in the space where the second side of the oxygen-enriched membrane is located is sucked by the exhaust device, thereby forming a negative pressure in the fresh-keeping space; and a pressure balance hole connecting the fresh-keeping space and the space outside the fresh-keeping box is provided on the fresh-keeping box, so that when a negative pressure is formed in the fresh-keeping space, the air in the space outside the fresh-keeping box enters the fresh-keeping space through the pressure balance hole.

4. The fresh-keeping device according to claim 2 or 3, characterized in that: The fresh-keeping box includes a box body and a cover body covered on the box body; the fresh-keeping space is formed in the box body, and the pressure balance hole is opened on the box body; and the cover body is provided with an exhaust hole connected to the fresh-keeping space, and the gas delivery component is detachably sealed and connected to the exhaust hole to suck the gas in the fresh-keeping space through the exhaust hole.

5. The fresh-keeping device according to claim 4, characterized in that: The cover body includes an inner cover and an outer cover covering the outer side of the inner cover, and the inner cover and the outer cover are spaced apart to form a accommodating cavity; the air extraction hole is provided on the outer cover; a through hole is provided on the inner cover, and the accommodating cavity is connected with the fresh-keeping space through the through hole; and the oxygen-enriched membrane assembly is arranged in the accommodating cavity, and the first side of the oxygen-enriched membrane is connected with the accommodating cavity.

6. The fresh-keeping device according to claim 5, characterized in that: The oxygen-enriched membrane assembly includes two oxygen-enriched membranes that are arranged in parallel and at intervals; the first sides of the two oxygen-enriched membranes are arranged back to back and are both exposed in the accommodating cavity; the second sides of the two oxygen-enriched membranes are arranged opposite to each other to form an oxygen-enriched gas collecting cavity between the two oxygen-enriched membranes; and the exhaust hole is connected to the oxygen-enriched gas collecting cavity through an exhaust pipeline.

7. The fresh-keeping device according to claim 6, characterized in that: The oxygen-enriched membrane assembly extends obliquely upward from the first side of the cover body to the second side of the cover body, and the first side of the cover body is arranged opposite to the second side of the cover body; and the oxygen-enriched membrane assembly is spaced apart from the cover body on the second side of the cover body, and the exhaust pipeline is connected to the oxygen-enriched gas collecting chamber at the end of the oxygen-enriched membrane assembly adjacent to the second side of the cover body.

8. The fresh-keeping device according to claim 1, characterized in that: The fresh-keeping box is provided with an exhaust hole connected to the fresh-keeping space; and the gas supply assembly includes an air supply pipe and a self-sealing mechanism; wherein the exhaust device is connected to the self-sealing mechanism, and the air supply pipe is detachably connected between the self-sealing mechanism and the exhaust hole; and the self-sealing mechanism is configured to connect the air supply pipe and the exhaust device when the air supply pipe is connected between the self-sealing mechanism and the exhaust hole, and to block the exhaust path of the exhaust device at the self-sealing mechanism when the air supply pipe is separated from the self-sealing mechanism and the exhaust hole.

9. The fresh-keeping device according to claim 8, characterized in that: The self-sealing mechanism comprises: A support frame, wherein a gas delivery cavity is defined inside the support frame, and a connecting hole is opened on one of the side walls of the gas delivery cavity; An elastic sealing structure is arranged in the air delivery cavity and is configured to be operably switched between a closed state for blocking the connecting hole and an open state for opening the connecting hole; wherein the air extraction device is communicated with the air delivery cavity; one end of the air delivery tube is detachably inserted into the connecting hole, so that when the elastic sealing structure is inserted into the connecting hole, the elastic sealing structure is caused to switch to the open state so as to allow the air delivery tube to communicate with the air delivery cavity through the connecting hole, and after the elastic sealing structure is removed from the connecting hole, the elastic sealing structure is restored to the closed state so as to block the connecting hole.

10. The fresh-keeping device according to claim 9, characterized in that: The exhaust hole is opened at the top of the fresh-keeping box, and the side wall where the connecting hole is located faces the fresh-keeping box and extends vertically; and the air supply pipe has a vertical pipe section extending vertically and used to be connected to the exhaust hole, and a horizontal pipe section extending horizontally and used to be connected to the connecting hole.

11. The fresh-keeping device according to claim 10, characterized in that: The support frame is provided with a horizontally extending rotating shaft, and the gas pipe is configured to be operably rotated around the rotating shaft in the up and down directions; and the rotating shaft is inserted into the horizontal pipe section in a direction perpendicular to the horizontal pipe section, and the rotating shaft deviates upward from the center of the horizontal pipe section in the vertical direction.

12. The fresh-keeping device according to claim 9, characterized in that: The elastic sealing structure comprises: A hollow column, disposed on a side of the gas delivery cavity opposite to the connecting hole, and having an opening facing the side where the connecting hole is located; An insertion rod, one end of which is inserted into the hollow column through the opening, and the other end of which is provided with a sealing plate located outside the hollow column, wherein the plane where the sealing plate is located is parallel to the plane where the connecting hole is located; and An elastic member is arranged between the bottom of the hollow column and the insertion rod; wherein when the gas delivery component is in the first state, one end of the gas delivery pipe is inserted into the connecting hole from the outside of the gas delivery cavity, and squeezes the sealing plate in a direction away from the connecting hole, so as to cause the sealing plate and the insertion rod to move in a direction away from the connecting hole, thereby compressing the elastic member and forming a gap between the sealing plate and the connecting hole, so that the gas delivery pipe is connected with the gas delivery cavity through the gap; and when the gas delivery component is in the second state, one end of the gas delivery pipe extends outward from the connecting hole to release the sealing plate, so that the sealing plate moves toward the connecting hole under the elastic deformation restoring force of the elastic member until the sealing plate is attached to the side wall where the connecting hole is located and covers the connecting hole.

13. The fresh-keeping device according to claim 1, characterized in that: It comprises a light emitting device and a reflecting device arranged on the outside of the fresh-keeping box; wherein the fresh-keeping box is transparent or translucent, and one of the side portions of the fresh-keeping box has a plurality of transparent reflecting portions arranged at intervals along the height direction of the fresh-keeping box, each of the transparent reflecting portions is configured to reflect the received light to the outside of the fresh-keeping box when there is an obstruction on the inner side of the fresh-keeping space facing the fresh-keeping space, and to allow the light to pass through and enter the fresh-keeping space when there is no obstruction on the inner side of the fresh-keeping space facing the fresh-keeping space, thereby forming a light spot at a position of the fresh-keeping box at the same height as the transparent reflecting portion; the light emitting device is configured to emit light to the transparent reflecting portion at the bottom; and the reflecting device is configured to receive light reflected by the other transparent reflecting portions except the uppermost transparent reflecting portion and reflect it to another transparent reflecting portion adjacent to and above the other transparent reflecting portion.

14. The fresh-keeping device according to claim 13, characterized in that: The reflecting device includes a plurality of reflecting plates arranged at intervals along the height direction of the fresh-keeping box, and the plurality of reflecting plates arranged in sequence from top to bottom are matched one by one with the plurality of transparent reflecting parts arranged in sequence from top to bottom; wherein each of the reflecting plates except the topmost reflecting plate is configured to receive the light reflected by the transparent reflecting part matching it and reflect it to another transparent reflecting part adjacent to and located above the transparent reflecting part; and the topmost reflecting plate is configured to receive the light reflected by the topmost transparent reflecting part and reflect it to a preset position above the topmost transparent reflecting part of the fresh-keeping box.

15. The fresh-keeping device according to claim 14, characterized in that: The postures of the multiple reflectors are all the same; or the postures of the multiple reflectors are not exactly the same; or the postures of the multiple reflectors are different.

16. The fresh-keeping device according to claim 13, characterized in that: The transparent reflective portion is a cut formed on the side of the fresh-keeping box and recessed into the interior of the fresh-keeping box; and the transparent reflective portion has a transparent reflective surface inclined from the lateral outer surface of the fresh-keeping box to the interior of the fresh-keeping box from bottom to top, so as to receive and reflect light through the transparent reflective surface.

17. The fresh-keeping device according to claim 16, characterized in that: The transparent reflective portion also has a relief surface which is inclined from the top edge of the transparent reflective surface toward the outside of the fresh-keeping box from bottom to top, so as to form a relief space below the relief surface, thereby avoiding the light reflected by the transparent reflective portion through the relief space.

18. The fresh-keeping device according to claim 16, characterized in that: A semi-permeable film is attached to the inner side or the outer side of each transparent reflective surface.

19. The fresh-keeping device according to claim 13, characterized in that: The other side of the fresh-keeping box opposite to one of the side parts also has a plurality of transparent reflective parts arranged at intervals along the height direction of the fresh-keeping box; and the plurality of transparent reflective parts on one of the side parts of the fresh-keeping box are symmetrically arranged one by one with the plurality of transparent reflective parts on the other side part of the fresh-keeping box.

20. A refrigerator, characterized in that: include: A box body, defining at least one storage compartment; At least one door, used to open and close the at least one storage compartment; as well as The fresh-keeping device according to any one of claims 1 to 19 is arranged in the box body or one of the door bodies.

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