Fresh-keeping device for refrigerator and refrigerator

Abstract

The invention relates to a fresh-keeping device for a refrigerator and the refrigerator. The fresh-keeping device comprises an air extractor and at least one fresh-keeping unit. Each fresh-keeping unit comprises a fresh-keeping box and a fresh-keeping box, wherein a fresh-keeping space is defined in the fresh-keeping And the air conveying assembly is detachably connected between the air extractor and the preservation box, so that the air extractor and the preservation space are communicated when the air conveying assembly is in a first state of connecting the air extractor and the preservation box, and self-sealing is formed when the air conveying assembly is in a second state of being separated from the preservation box, so that airflow is prevented from flowing through the air conveying assembly. The fresh-keeping device is configured to suck air in the fresh-keeping space communicated with the fresh-keeping device through the air extractor, so that a low-oxygen environment with the oxygen content lower than that in the air is formed in the fresh-keeping space. Low-oxygen environments with different oxygen contents can be formed in different fresh-keeping units so as to accurately perform higher-quality fresh-keeping storage on different types of food materials, meanwhile, the situation that an air extractor invalidly extracts air outside the fresh-keeping device can be avoided, and the air extraction efficiency of the air extractor is improved.

Description

Technical Field

[0001] The invention relates to refrigeration and freezing technology, in particular to a fresh-keeping device for a refrigerator and the refrigerator. Background Art

[0002] Food mildew is mainly caused by microbial activity. Most molds and yeasts rely on oxygen and suitable temperature for survival. Currently, the main means of preserving food are to reduce oxygen content and lower temperature. For low-oxygen environments, specific methods include vacuum preservation and inert gas. The purpose is to change the composition of environmental gases without changing the storage space to achieve the purpose of preservation. For vacuum preservation, the basic principle is: the air in the container is pumped out by a vacuum pump, and the amount of oxygen is reduced.

[0003] The applicant has previously proposed a fresh-keeping device, which has multiple fresh-keeping boxes. When the exhaust device exhausts air, it will simultaneously suck the gas in multiple fresh-keeping boxes. Therefore, the storage environment finally formed in each fresh-keeping box is roughly the same or similar. In this way, even if the fresh-keeping device has multiple different fresh-keeping boxes, it is difficult to form storage environments with different oxygen contents in different fresh-keeping boxes, which is not conducive to the classified storage of different ingredients with different oxygen content requirements. Summary of the invention

[0004] An object of the first aspect of the present invention is to overcome at least one defect of the prior art and to provide a fresh-keeping device for a refrigerator, and to facilitate forming fresh-keeping spaces with different environments in the fresh-keeping device.

[0005] Another object of the first aspect of the present invention is to improve the air extraction efficiency of the air extraction device.

[0006] A further object of the first aspect of the present invention is to effectively reduce the oxygen content in the fresh-keeping device in a manner that there is almost no pressure difference, thereby extending the fresh-keeping storage period of the food.

[0007] The second aspect of the present invention aims to provide a refrigerator having the above-mentioned fresh-keeping device.

[0008] According to a first aspect of the present invention, the present invention provides a fresh-keeping device for a refrigerator, which comprises an air extraction device and at least one fresh-keeping unit, wherein

[0009] Each of the fresh-keeping units comprises:

[0010] A fresh-keeping box, which defines a fresh-keeping space for storing items; and

[0011] an air delivery assembly 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 airflow from flowing therethrough; and

[0012] The fresh-keeping device is configured to suck the gas in the fresh-keeping space connected thereto through the exhaust 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.

[0013] Optionally, there are multiple fresh-keeping units, and the multiple fresh-keeping units are independently arranged.

[0014] Optionally, each of the fresh-keeping units further includes:

[0015] An oxygen-enriched membrane module has at least one oxygen-enriched membrane, wherein the oxygen-enriched membrane is configured so that more oxygen in the air located on a first side thereof permeates through the oxygen-enriched membrane than nitrogen in the air to flow to a second side of the oxygen-enriched membrane;

[0016] The first side of the oxygen-enriched membrane is in communication with the fresh-keeping space; the second side of the oxygen-enriched membrane is in communication with the air extraction device when the gas delivery 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 air extraction device, thereby forming a negative pressure in the fresh-keeping space; and

[0017] The fresh-keeping box is provided with a pressure balance hole connecting the fresh-keeping space and the space outside the fresh-keeping box, so that when 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.

[0018] Optionally, the fresh-keeping box comprises 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

[0020] The cover body is provided with an air extraction hole connected with the fresh-keeping space, and the gas delivery assembly is detachably sealed and connected with the air extraction hole so as to extract the gas in the fresh-keeping space through the air extraction hole.

[0021] Optionally, the cover body comprises 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 receiving cavity;

[0022] The air extraction hole is provided on the outer cover;

[0023] The inner cover is provided with a through hole, and the accommodating cavity is connected with the fresh-keeping space through the through hole; and

[0024] The oxygen-enriched membrane assembly is disposed in the accommodating chamber, and the first side of the oxygen-enriched membrane is in communication with the accommodating chamber.

[0025] Optionally, the oxygen-enriched membrane assembly comprises two oxygen-enriched membranes arranged in parallel and at intervals;

[0026] The first sides of the two oxygen-enriched membranes are arranged opposite to each other and are both exposed in the accommodating cavity;

[0027] The second sides of the two oxygen-enriched membranes are arranged opposite to each other to form an oxygen-enriched gas collecting chamber between the two oxygen-enriched membranes; and

[0028] The air extraction hole is communicated with the oxygen-rich gas collecting chamber through an air extraction pipeline.

[0029] 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

[0030] The oxygen-enriched membrane assembly is spaced apart from the cover body at the second side of the cover body, and the exhaust pipeline is communicated with the oxygen-enriched gas collecting chamber at the end of the oxygen-enriched membrane assembly adjacent to the second side of the cover body.

[0031] Optionally, the fresh-keeping box is provided with an air extraction hole connected to the fresh-keeping space; and

[0032] The gas delivery assembly includes a gas delivery pipe and a self-sealing mechanism; wherein

[0033] The air extraction device is connected to the self-sealing mechanism, and the air delivery pipe is detachably connected between the self-sealing mechanism and the air extraction hole; and

[0034] The self-sealing mechanism is configured to connect the gas pipe and the air extraction device when the gas pipe is connected between the self-sealing mechanism and the air extraction hole, and to block the air extraction path of the air extraction device at the self-sealing mechanism when the gas pipe is separated from the self-sealing mechanism and the air extraction hole.

[0035] Optionally, the self-sealing mechanism comprises:

[0036] 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;

[0037] An elastic sealing structure is disposed 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

[0038] The air extraction device is in communication with the air delivery cavity;

[0039] One end of the air delivery pipe is detachably inserted into the connecting hole, so that when the air delivery pipe is inserted into the connecting hole, the elastic sealing structure is switched to the open state, thereby allowing the air delivery pipe to communicate with the air delivery cavity through the connecting hole; after the air delivery pipe is removed from the connecting hole, the elastic sealing structure is restored to the closed state, thereby blocking the connecting hole.

[0040] Optionally, the air extraction 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

[0041] The gas delivery pipe comprises a vertical pipe section extending in a vertical direction and used to be connected to the air extraction hole, and a horizontal pipe section extending in a horizontal direction and used to be connected to the connection hole.

[0042] Optionally, a horizontally extending rotating shaft is provided on the support frame, and the gas delivery pipe is configured to be operable to rotate in an up-and-down direction around the rotating shaft; and

[0043] The rotating shaft is arranged in the horizontal pipe section along 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.

[0044] Optionally, the elastic sealing structure comprises:

[0045] 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;

[0046] 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

[0047] An elastic member is arranged between the bottom of the hollow column and the insertion rod; wherein

[0048] When the gas delivery assembly 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 the sealing plate is pressed 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 to the gas delivery cavity through the gap; and

[0049] 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.

[0050] According to a second aspect of the present invention, the present invention further provides a refrigerator, comprising:

[0051] A box body, defining at least one storage compartment;

[0052] at least one door, used to open and close the at least one storage compartment; and

[0053] The fresh-keeping device according to any of the above schemes is arranged in the box body or one of the door bodies.

[0054] The fresh-keeping device of the present invention comprises an air extraction device and at least one fresh-keeping unit, each fresh-keeping unit not only comprises a fresh-keeping box with a fresh-keeping space defined therein, but also is particularly provided with a gas transmission component detachably connected between the air extraction device and the fresh-keeping box. When the gas transmission component is in a first state of connecting the air extraction device and the fresh-keeping box, the air extraction device and the fresh-keeping space in the fresh-keeping box can be connected, so that when the air extraction device is running, the air extraction device is allowed to suck the gas in the fresh-keeping space through the gas transmission component, thereby forming a low oxygen environment in the fresh-keeping space, which is beneficial to the food in the fresh-keeping space. When the gas transmission device is in a second state separated from the fresh-keeping box, the gas transmission component forms a self-sealing, and even if the air extraction device is running, the gas cannot be sucked through the gas transmission component, which is equivalent to the air extraction path of the air extraction device at the air extraction component being blocked, and the air extraction device can neither suck the gas in the fresh-keeping space through the gas transmission component nor suck the gas outside the fresh-keeping device through the gas transmission component, thereby facilitating the air extraction device to more effectively suck the gas in other fresh-keeping spaces through other gas transmission components.

[0055] The present invention separately sets 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 that different types of food can be more accurately stored in higher quality for fresh-keeping. On the other hand, the self-sealing function of the gas transmission component can be used to 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.

[0056] Furthermore, a pressure balance hole connecting the fresh-keeping space and the space outside the fresh-keeping box is provided on the fresh-keeping box. When the exhaust device is started, the gas in the space where the second side of the oxygen-enriched membrane is located can be sucked, and a negative pressure is formed in the space where the second side of the oxygen-enriched membrane is located. Under the action of the negative pressure, the oxygen in the fresh-keeping space connected to the first side of the oxygen-enriched membrane flows through the oxygen-enriched membrane to the space where the second side of the oxygen-enriched membrane is located, and is exhausted by the exhaust device. A certain negative pressure is formed in the fresh-keeping space. Under the action of the negative pressure, the air in the space outside the fresh-keeping box can enter the fresh-keeping space through the pressure balance hole to quickly balance the negative pressure in the fresh-keeping space, so that the air pressure in the fresh-keeping space and the space outside the fresh-keeping box maintain a dynamic balance. 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 air flow 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 beneficial 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.

[0057] Based on the following detailed description of specific embodiments of the present invention in conjunction with the accompanying drawings, those skilled in the art will become more aware of the above and other objects, advantages and features of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] Hereinafter, some specific embodiments of the present invention will be described in detail in an exemplary and non-limiting manner with reference to the accompanying drawings. The same reference numerals in the accompanying 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 accompanying drawings:

[0059] Figure 1 is a schematic structural diagram of a fresh-keeping device for a refrigerator according to an embodiment of the present invention;

[0060] Figure 2 is a schematic structural exploded view of a fresh-keeping device for a refrigerator according to an embodiment of the present invention;

[0061] Figure 3 is a schematic cross-sectional view of a fresh-keeping device for a refrigerator according to one embodiment of the present invention;

[0062] Figure 4 is a schematic cross-sectional view of an oxygen-enriched membrane module according to one embodiment of the present invention;

[0063] Figure 5 is a schematic structural exploded view of a fresh-keeping box in a cross-sectional state according to an embodiment of the present invention;

[0064] Figure 6is a schematic structural exploded view of a gas delivery assembly in a cross-sectional state according to an embodiment of the present invention;

[0065] Figure 7 is a schematic structural diagram of a refrigerator according to an embodiment of the present invention;

[0066] Figure 8 is a schematic structural diagram of a door body according to an embodiment of the present invention. DETAILED DESCRIPTION

[0067] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0068] The following will mainly describe the specific structure of the fresh-keeping device and the refrigerator. It is worth noting that in order to avoid repeatedly describing the same feature and making the specification too complicated, 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 specification has provided an embodiment in which the feature is applied to other embodiments.

[0069] The present invention first provides a fresh-keeping device for a refrigerator. Figure 1 is a schematic structural diagram of a fresh-keeping device for a refrigerator according to an embodiment of the present invention, Figure 2 is a schematic structural exploded view of a fresh-keeping device for a refrigerator according to an embodiment of the present invention, Figure 3 is a schematic cross-sectional view of a fresh-keeping device for a refrigerator according to an embodiment of the present invention. Figures 1 to 3 The fresh-keeping device 10 of the present invention comprises an exhaust device 10b and at least one fresh-keeping unit 10a. Specifically, the number of the fresh-keeping unit 10a can be one or more.

[0070] In particular, each fresh-keeping unit 10 a includes a fresh-keeping box 11 and a gas delivery component 14 .

[0071] The fresh-keeping box 11 defines a fresh-keeping space 111 for storing items.

[0072] The air delivery component 14 is detachably connected between the air exhaust device 10b and the fresh-keeping box 11, so as to connect the air exhaust device 10b and the fresh-keeping box 11 when it is in a first state in which the air exhaust 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.

[0073] Furthermore, the fresh-keeping device 10 is configured to suck the gas in the fresh-keeping space 111 connected thereto through the exhaust device 10b, so as to form a hypoxic environment in which the oxygen content is lower than the oxygen content in the air in the fresh-keeping space 111. That is, the exhaust device 10b can only suck the gas in the fresh-keeping space 111 connected thereto, but cannot suck the gas in the fresh-keeping space 111 not connected thereto.

[0074] The fresh-keeping device 10 of the present invention includes an air extraction device 10b and at least one fresh-keeping unit 10a, each of which includes not only a fresh-keeping box 11 defining a fresh-keeping space 111, but also a gas transmission component 14 detachably connected between the air extraction device 10b and the fresh-keeping box 11. When the gas transmission component 14 is in a first state of 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 can be connected, so that when the air extraction device 10b is running, the air extraction device 10b is allowed to suck the gas in the fresh-keeping space 111 through the gas transmission component 14, thereby forming a low-oxygen environment in the fresh-keeping space 111, which is beneficial to the food in the fresh-keeping space 111.

[0075] When the gas delivery device 14 is in the second state separated from the fresh-keeping box 11, the gas delivery component 14 forms a self-sealing, and even if the air extraction device 10b is running, it cannot extract gas through the gas delivery component 14, which is equivalent to the air extraction path of the air extraction device 10b at the air extraction component 14 being blocked. The air extraction device 10b can neither extract gas in the fresh-keeping space 111 through the gas delivery component 14, nor can it extract gas outside the fresh-keeping device 10 through the gas delivery component 14, so that the air extraction device 10b can more effectively extract gas in other fresh-keeping spaces 111 through other gas delivery components 14.

[0076] The present invention separately sets a gas transmission component 14 for each fresh-keeping unit 10a, so that the exhaust process of the fresh-keeping unit 10a is independent of the exhaust process of other fresh-keeping units 10a, and whether each fresh-keeping unit 10a is exhausted and the exhaust time 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 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 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.

[0077] In some embodiments, there are multiple fresh-keeping units 10a, and the multiple fresh-keeping units 10a are independently arranged. That is, the food storage and air extraction processes of the multiple fresh-keeping units 10a are independent of each other and do not affect each other. Thus, a low-oxygen environment with different oxygen contents can be formed in the multiple fresh-keeping units 10a, so that different types of food can be more accurately and stored with higher quality.

[0078] It is understandable that there are many ways for the fresh-keeping device 10 to form a low-oxygen environment in the fresh-keeping space 111. In the prior 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 that is pumped out is almost air with equal proportions 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 of the container is required to be high; the food is placed in the container, and after the vacuum is pumped, the air pressure in the container decreases, so that there is a large pressure difference between the inside and outside of the food. For food with high moisture, the risk of moisture loss is very high; there is a high pressure difference between the inside and outside of the container. If it is not taken according to the method specified by the designer, there may be a safety risk; vacuum preservation has high requirements for container sealing. During the pressure holding time, it will slowly leak, and a vacuum pump is required to automatically pump air every certain period of time, and the pressure holding period is short; during the pressure holding time, since the container will slowly leak, the gas outside the container, such as the gas in the refrigerator, will enter the container, and the risk of flavor cross-talk is relatively high.

[0079] In order to solve the above-mentioned technical problems, in some embodiments of the present invention, each fresh-keeping unit 10 a further includes an oxygen-enriching membrane assembly 12 . Figure 4 1 is a schematic cross-sectional view of an oxygen-enriched membrane module according to an embodiment of the present invention. The oxygen-enriched membrane module 12 has at least one oxygen-enriched membrane 121, and the oxygen-enriched membrane 121 is configured so that the oxygen in the air located on the first side thereof passes through the oxygen-enriched membrane 121 more than the nitrogen therein and flows to the second side of the oxygen-enriched membrane 121. The first side of the oxygen-enriched membrane 121 is connected to the fresh-keeping space 111.

[0080] 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. In addition, the direction in which oxygen and moisture pass through the oxygen-enriched membrane 121 is unidirectional, and can only pass from the first side of the oxygen-enriched membrane 121 to the second side of the oxygen-enriched membrane 121.

[0081] 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 by the exhaust device 10b, thereby forming a negative pressure in the fresh-keeping space 111.

[0082] In particular, the fresh-keeping box 11 is provided with a pressure balance 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 balance hole 112 .

[0083] The present invention also provides a pressure balance 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 the 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 the negative pressure, the air in the space outside the fresh-keeping box 11 can enter the fresh-keeping space 111 through the pressure balance 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.

[0084] It is understandable that a certain unit of oxygen is extracted from the fresh-keeping space 111 by the exhaust device 10b, and the same unit of air enters the fresh-keeping space 111 from the pressure balance hole 112. Although the total amount of gas in the fresh-keeping space 111 remains almost unchanged, the proportion of oxygen in the air is only about 21%, which is far less than the amount of oxygen extracted by the exhaust device 10b. Therefore, during the operation of the exhaust device 10b, the oxygen content in the fresh-keeping space 111 gradually decreases.

[0085] When the exhaust device 10b stops running, on the one hand, more oxygen in the fresh-keeping space 111 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 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 the food in the fresh-keeping space 111, prolonging the fresh-keeping period of the food, and effectively reducing the risk of odor contamination inside and outside the fresh-keeping device 10.

[0086] Furthermore, during the air extraction process of the fresh-keeping device 10 of the present invention, the fresh-keeping space 111 and the external space are in an airflow state, and the fresh-keeping device does not need to be completely sealed, which reduces the design requirements for its sealing performance. At the same time, since a negative pressure state is not formed in the fresh-keeping space 111, no matter how the user takes the food, there will be no safety hazard, and the food in the fresh-keeping space 111 will not lose moisture, which further improves the fresh-keeping effect.

[0087] It can be seen that the present invention can form 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.

[0088] The inventors have realized that in order to better achieve the preservation effect of the preservation device 10 and 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.

[0089] Figure 5 1 is a schematic structural exploded view of a fresh-keeping box in a cross-sectional state according to an embodiment of the present invention. In some embodiments, the fresh-keeping box 11 includes a box body 15 and a cover body 16 covered on the box body 15. A fresh-keeping space 111 is formed in the box body 15, and a pressure balance hole 112 is opened on the box body 15 so as to be directly connected to the fresh-keeping space 111 in the box body 15.

[0090] Specifically, the pressure balance hole 112 may be formed on the bottom wall or the side wall of the box body 15. Since the pressure balance hole 112 has a small hole diameter, the food will not leak out through the pressure balance hole 112.

[0091] Furthermore, the cover body 16 is provided with an air extraction hole 161 communicating with the fresh-keeping space 111 , and the gas delivery assembly 14 is detachably sealed and connected to the air extraction hole 161 to extract the gas in the fresh-keeping space 111 through the air extraction hole 161 .

[0092] That is, the gas delivery assembly 14 is detachably sealed and connected to the top of the fresh-keeping box 11, so that the user can easily perform the operation of disassembling and assembling the gas delivery assembly 14. Specifically, when the user needs to put items into the fresh-keeping space 111, the gas delivery assembly 14 can be removed from the top of the fresh-keeping box 11, and then the cover 16 can be opened. After the items are placed, the user can cover the cover 16 and then connect the gas delivery assembly 14 to the top of the fresh-keeping box 11.

[0093] 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 , and the inner cover 162 and the outer cover 163 are spaced apart to form a receiving cavity 164 .

[0094] Further, the air extraction hole 161 is provided 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.

[0095] Furthermore, the oxygen-enriched membrane assembly 12 is disposed in the accommodating chamber 164, and the first side of the oxygen-enriched membrane 121 is in communication with the accommodating chamber 164, thereby indirectly communicating with the fresh-keeping space 111. That is, the oxygen-enriched membrane assembly 12 is hidden in the cover 16, does not occupy the space in the box body 15, does not affect the appearance of the fresh-keeping box 11, and does not affect the placement of food. In addition, the oxygen-enriched membrane assembly 12 is close to the gas delivery assembly 14, which is convenient for structural arrangement. At the same time, the inner and outer double-layer structure of the cover 16 is also convenient for the maintenance and replacement of the oxygen-enriched membrane assembly 12.

[0096] In some embodiments, the oxygen-enriched membrane assembly 12 includes two oxygen-enriched membranes 121 arranged in parallel and spaced apart. The first sides of the two oxygen-enriched membranes 121 are arranged opposite to each other and are both exposed in the accommodating chamber 164 to communicate with the accommodating chamber 164 at the same time. The second sides of the two oxygen-enriched membranes 121 are arranged opposite to each other to form an oxygen-enriched gas collection chamber 122 between the two oxygen-enriched membranes 121. The air extraction hole 161 is connected to the oxygen-enriched gas collection chamber 122 through the air extraction pipeline 165.

[0097] 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 pipeline 165, thereby sucking the gas in the oxygen-rich gas collecting chamber 122, and a negative pressure is formed in the oxygen-rich gas collecting chamber 122. Under the action of the negative pressure, the oxygen in the accommodating chamber 164 can flow to the oxygen-rich gas collecting chamber 122 through the two oxygen-rich membranes 121 at the same time, 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.

[0098] Furthermore, the oxygen-enriched membrane assembly 12 may further include a mounting frame for supporting the two oxygen-enriched membranes 121 , and the two oxygen-enriched membranes 121 are supported inside the mounting frame.

[0099] Of course, in other embodiments, the oxygen-enriched membrane assembly 12 may also include only one oxygen-enriched membrane 121. In these embodiments, the oxygen-enriched membrane assembly 12 also includes a mounting frame for supporting the oxygen-enriched membrane 121, and a plate body for blocking an opening on one side of the mounting frame. The oxygen-enriched membrane 121 covers the opening on the other side of the mounting frame. Thus, a relatively closed oxygen-enriched gas collection chamber can also be defined between the oxygen-enriched membrane 121, the mounting frame, and the plate body.

[0100] In some embodiments, the oxygen-enriched membrane assembly 12 extends obliquely upward from the first side of the cover body 16 to the second side of the cover body 16, and the first side of the cover body 16 is arranged opposite to the second side of the cover body 16. The oxygen-enriched membrane assembly 12 is spaced apart from the cover body 16 on the second side of the cover body 16, and the exhaust pipeline 165 is connected to the oxygen-enriched gas collection chamber 122 at the end of the oxygen-enriched membrane assembly 12 adjacent to the second side of the cover body 16.

[0101] The oxygen-enriched membrane assembly 12 is tilted, so that the length of the oxygen-enriched membrane assembly 12 can be extended within a limited space, thereby increasing the oxygen permeability area of ​​the oxygen-enriched membrane 121 and further improving the oxygen extraction efficiency.

[0102] 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, a certain interval can be formed 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. Under the premise of ensuring sufficient oxygen permeability area, sufficient space is provided for the bending and reversing of the exhaust pipe 165, thereby 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.

[0103] In some embodiments, the fresh-keeping box 11 is provided with an air extraction hole 161 communicating with the fresh-keeping space 111. The gas delivery component 14 includes a gas delivery pipe 141 and a self-sealing mechanism 142.

[0104] 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 can 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 component 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 component 14 is in its second state.

[0105] 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.

[0106] 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 in sequence, and then 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 not connected to the external space of the fresh-keeping device 10.

[0107] Figure 6 14 is a schematic structural exploded view of a gas delivery assembly in a cross-sectional state according to an embodiment of the present invention. In some embodiments, the self-sealing mechanism 142 may include a support frame 1421 and an elastic sealing structure 1422 .

[0108] The support frame 1421 defines an air delivery cavity 14211 therein, and a connecting hole 14213 is formed on one of the side walls 14212 defining the air delivery cavity 14211 .

[0109] 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 .

[0110] Further, the air extraction device 10b is connected to the air delivery cavity 14211. One end of the air delivery pipe 141 is detachably inserted into the connection hole 14213, so that when the air delivery pipe 141 is inserted into the connection hole 14213, the elastic sealing structure 1422 is switched to its open state, thereby allowing the air delivery pipe 141 to communicate with the air delivery cavity 14211 through the connection hole 14213 and then communicate with the air extraction device 10b, and after the air delivery pipe 141 is removed from the connection hole 14213, the elastic sealing structure 1422 is restored to its closed state, thereby blocking the connection hole 14213 and blocking the communication between the air delivery cavity 14211 and any space outside the self-sealing mechanism 142.

[0111] The present invention provides a support frame 1421, and 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, and the operation is very simple; and the elastic sealing structure 1422 is allowed to be hidden inside the air delivery cavity 14211, which is not easy to interfere with or affect other structures, and the structural stability is high, and the appearance is simplified, thereby improving the neatness of the appearance.

[0112] 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 can be integrally formed to facilitate overall assembly.

[0113] 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.

[0114] Furthermore, the gas delivery pipe 141 has a vertical pipe section 1411 extending in the vertical direction and used to be connected to the air extraction hole 161, and a horizontal pipe section 1412 extending in the horizontal direction and used to be connected to the connection hole 14213. That is, the gas delivery pipe 141 is generally L-shaped, so that its two ends are respectively connected to the air extraction hole 161 and the connection hole 14213. It should be noted that the extension directions of the vertical pipe section 1411 and the horizontal pipe section 1412 here are both in the state where the two ends of the gas delivery pipe 141 are respectively connected to the air extraction hole 161 and the connection hole 14213.

[0115] In some embodiments, a horizontally extending rotating shaft 14215 is provided on the support frame 1421, and the gas delivery pipe 141 is configured to be operably rotated in the up-down direction around the rotating shaft 14215. Further, the rotating shaft 14215 is arranged in the horizontal pipe section 1412 in a direction perpendicular to the horizontal pipe section 1412, and the rotating shaft 14215 deviates upward from the center of the horizontal pipe section 1412 in the vertical direction. That is, the rotating shaft of the gas delivery pipe 141 is an eccentric shaft.

[0116] The present invention specially sets the rotating shaft of the air pipe 141 as 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 air extraction 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 completely separate from the preservation device 10, which is convenient for the placement of the air pipe 141.

[0117] 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 to separate it from the air extraction hole 161 and the connecting hole 14213, it is only necessary to rotate the gas pipe 141 upwards, and 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, it is only necessary to rotate the gas pipe 141 in the opposite direction. Since the rotating shaft 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 the smooth rotation of the gas pipe 141.

[0118] In some embodiments, the elastic sealing structure 1422 may include a hollow column 14221 , an insertion rod 14222 , and an elastic member 14223 .

[0119] The hollow column 14221 is disposed on a side of the gas delivery cavity 14211 opposite to the connection hole 14213, and has an opening facing the side where the connection hole 14213 is located. One end of the insertion rod 14222 is inserted into the hollow column 14221 through the opening of the hollow column 14221, and the other end is provided with a sealing plate 14224 located outside the hollow column 14221, and the plane where the sealing plate 14224 is located is parallel to the plane where the connection hole 14213 is located. The elastic member 14223 is disposed between the bottom of the hollow column 14221 and the insertion rod 14222.

[0120] 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 squeezes the sealing plate 14224 in a direction away from the connecting hole 14213, so as 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.

[0121] 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 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.

[0122] Furthermore, a first sealing ring 1423 is provided on the periphery of one side 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.

[0123] 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.

[0124] In some embodiments, the fresh-keeping device 10 further includes a base 17, and at least one fresh-keeping unit 10a is supported on the base 17, so as to integrally and stably support at least one fresh-keeping unit 10a.

[0125] In some embodiments, the air extraction device 10b can be arranged outside the fresh-keeping unit 10a. When the air extraction device 10b is in operation, it will generate certain noise and vibration. For this reason, the present invention places the air extraction device 10b outside, and can flexibly arrange the air extraction device 10b at other suitable positions of the refrigerator according to actual conditions, such as the compressor compartment or other positions, so as to avoid the air extraction device 10b driving the fresh-keeping unit 10a to vibrate and reduce the noise that the user can feel.

[0126] The present invention also provides a refrigerator. Figure 7 Refrigerator 1 includes a housing 20 and at least one door 30. At least one storage compartment is defined in the housing 20, and at least one door 30 is used to open and close the at least one storage compartment.

[0127] 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 .

[0128] Figure 8 30 is a schematic structural diagram of a door body according to an embodiment of the present invention. In some embodiments, the fresh-keeping device 10 can be arranged on the inner side of the door body 30 and exposed to the outside of the door body 30. On the one hand, it is convenient for the user to take and put items into the fresh-keeping device 10 when the door body 30 is open. On the other hand, the cooling airflow in the box body 20 can be used to cool the fresh-keeping device 10 when the door body 30 is closed, ensuring that the temperature in the fresh-keeping device 10 is low, which is more conducive to the preservation of the food therein.

[0129] In the description of the present embodiment, the description with 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 invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0130] Furthermore, the terms “first”, “second”, and “third” are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0131] In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0132] Those skilled in the art should understand that the terms "upper", "lower", "front", "back", "top", "bottom" and the like used to indicate orientation or positional relationships in the embodiments of the present invention are based on the actual use status of the fresh-keeping device and the refrigerator. These terms are only used to facilitate the description and understanding of the technical solution of the present invention, 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 invention.

[0133] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0134] At this point, those skilled in the art should recognize that, although multiple exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications that conform to the principles of the present invention can still be directly determined or derived based on the content disclosed in the present invention without departing from the spirit and scope of the present invention. Therefore, the scope of the present invention should be understood and recognized as covering all these 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 an air delivery assembly 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 airflow from flowing therethrough; and The fresh-keeping device is configured to suck the gas in the fresh-keeping space connected thereto through the exhaust 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.

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: An oxygen-enriched membrane module has at least one oxygen-enriched membrane, wherein the oxygen-enriched membrane is configured so that more oxygen in the air located on a first side thereof permeates through the oxygen-enriched membrane than nitrogen in the air to flow to a second side of the oxygen-enriched membrane; The first side of the oxygen-enriched membrane is in communication with the fresh-keeping space; the second side of the oxygen-enriched membrane is in communication with the air extraction device when the gas delivery 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 air extraction device, thereby forming a negative pressure in the fresh-keeping space; and The fresh-keeping box is provided with a pressure balance hole connecting the fresh-keeping space and the space outside the fresh-keeping box, so that when 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 3, characterized in that: The fresh-keeping box comprises a box body and a cover body arranged 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 air extraction hole connected with the fresh-keeping space, and the gas delivery assembly is detachably sealed and connected with the air extraction hole so as to extract the gas in the fresh-keeping space through the air extraction hole.

5. The fresh-keeping device according to claim 4, characterized in that: The cover body comprises 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 receiving cavity; The air extraction hole is provided on the outer cover; The inner cover is provided with a through hole, and the accommodating cavity is connected with the fresh-keeping space through the through hole; and The oxygen-enriched membrane assembly is disposed in the accommodating chamber, and the first side of the oxygen-enriched membrane is in communication with the accommodating chamber.

6. The fresh-keeping device according to claim 5, characterized in that: The oxygen-enriched membrane assembly comprises two oxygen-enriched membranes arranged in parallel and at intervals; The first sides of the two oxygen-enriched membranes are arranged opposite to each other 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 chamber between the two oxygen-enriched membranes; and The air extraction hole is communicated with the oxygen-rich gas collecting chamber through an air extraction 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 at the second side of the cover body, and the exhaust pipeline is communicated with 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 air extraction hole connected to the fresh-keeping space; and The gas delivery assembly includes a gas delivery pipe and a self-sealing mechanism; wherein The air extraction device is connected to the self-sealing mechanism, and the air delivery pipe is detachably connected between the self-sealing mechanism and the air extraction hole; and The self-sealing mechanism is configured to connect the gas pipe and the air extraction device when the gas pipe is connected between the self-sealing mechanism and the air extraction hole, and to block the air extraction path of the air extraction device at the self-sealing mechanism when the gas pipe is separated from the self-sealing mechanism and the air extraction 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 disposed 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 The air extraction device is in communication with the air delivery cavity; One end of the air delivery pipe is detachably inserted into the connecting hole, so that when the air delivery pipe is inserted into the connecting hole, the elastic sealing structure is switched to the open state, thereby allowing the air delivery pipe to communicate with the air delivery cavity through the connecting hole; after the air delivery pipe is removed from the connecting hole, the elastic sealing structure is restored to the closed state, thereby blocking the connecting hole.

10. The fresh-keeping device according to claim 9, characterized in that: The air extraction 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 delivery pipe comprises a vertical pipe section extending in a vertical direction and used to be connected to the air extraction hole, and a horizontal pipe section extending in a horizontal direction and used to be connected to the connection 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 delivery pipe is configured to be operable to rotate in an up-and-down direction around the rotating shaft; and The rotating shaft is disposed in the horizontal pipe section along 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 assembly 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 the sealing plate is pressed 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 to 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.

13. 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 12 is arranged on the box body or one of the door bodies.

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