Fresh-keeping device for refrigerator and refrigerator

Abstract

The utility model discloses a fresh-keeping device for a refrigerator and the refrigerator, and relates to the field of refrigerators. The refrigerator is provided with at least two mutually independent fresh-keeping chambers, the fresh-keeping device comprises at least two oxygen-enriched assemblies, and each oxygen-enriched assembly comprises at least one oxygen-enriched membrane and a collecting cavity; an air extractor; each exhaust pipe is connected with one collecting cavity; one end of the air inlet pipe is connected with the air inlet end of the air extractor, and the other end of the air inlet pipe is connected with at least two air extraction pipes; the adjusting movable part is arranged at the joint of the air inlet pipe and the at least two exhaust pipes, and the adjusting movable part is movably arranged and used for controlling opening and closing of the at least two exhaust pipes. According to the fresh-keeping device, the scheme that efficient oxygen reduction is conducted on the multiple fresh-keeping chambers through the single air extractor is achieved, and cost is reduced. The flow of the at least two exhaust pipes is controlled at the same time through the adjusting structure, so that the oxygen exhaust amount of the at least two fresh-keeping chambers can be controlled at the same time, and differential setting of the oxygen content of the at least two fresh-keeping chambers can be achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of refrigerator, in particular to a kind of fresh-keeping device for refrigerator and refrigerator. BACKGROUND

[0002] Low oxygen is a better preservation way for food preservation, and the benefit of low oxygen for fruit and vegetable preservation is that it can effectively inhibit the respiration of fruits and vegetables and reduce the consumption of organic matter, thereby prolonging the preservation period of fruits and vegetables. Therefore, more and more oxygen control preservation technologies appear on the market, such as MSA modified atmosphere preservation.

[0003] In the prior art, for the multi-chamber preservation scheme, the number of parts is usually large and the cost is high. Therefore, how to control the cost and realize the multi-chamber preservation scheme with simple structure is one of the research directions that needs to be supplemented in the prior art. UTILITY MODEL CONTENT

[0004] The utility model aims to solve at least one of the technical problems in the prior art. Therefore, the utility model provides a fresh-keeping device for refrigerator and refrigerator, which can realize the preservation scheme of each chamber with simple structure and low cost.

[0005] According to the fresh-keeping device for refrigerator of the utility model embodiment, the refrigerator has at least two independent preservation chambers, and the fresh-keeping device comprises: at least two oxygen enrichment assemblies, at least two oxygen enrichment assemblies are provided for corresponding at least two preservation chambers, each oxygen enrichment assembly comprises at least one oxygen enrichment membrane and a collection cavity, and the oxygen enrichment assembly is used to make the oxygen in the preservation chamber penetrate through the oxygen enrichment membrane and enter the collection cavity more than nitrogen; an air extraction device; at least two air extraction pipes, each air extraction pipe is connected to a collection cavity; an air inlet pipe, one end of the air inlet pipe is connected to the air inlet end of the air extraction device, the other end of the air inlet pipe is connected to at least two air extraction pipes, so that the gas in the collection cavity is sucked into the air extraction device; and an adjusting structure, the adjusting structure comprises an adjusting movable part, the adjusting movable part is arranged at the connection between the air inlet pipe and at least two air extraction pipes, the adjusting movable part is movably arranged, and is used to control the opening and closing of at least two air extraction pipes.

[0006] The fresh-keeping device for refrigerator of the utility model embodiment is connected to at least two oxygen enrichment assemblies by one air extraction device, which can realize the scheme of efficiently reducing oxygen in multiple preservation chambers by a single air extraction device. The number of air extraction devices is reduced, and the cost is reduced.

[0007] Moreover, the flow of at least two air extraction pipes is controlled by the adjusting structure, so that the oxygen extraction amount of at least two preservation chambers can be controlled at the same time, and it is also beneficial to realize the differential setting of oxygen content in at least two preservation chambers.

[0008] In some embodiments, one of the air inlet pipes connects two of the air exhaust pipes, and the adjusting movable part is rotatably arranged at the connection of the air inlet pipe and the two air exhaust pipes.

[0009] In particular, the adjusting movable part is an adjusting plate, which can swing to cooperate with any one of the air exhaust pipes to completely close the air exhaust pipe, and completely open another air exhaust pipe.

[0010] Further, the adjusting plate has an intermediate position, in which the adjusting plate simultaneously opens the two air exhaust pipes.

[0011] Optionally, the inner walls of the two air exhaust pipes are respectively provided with sealing parts, and the adjusting plate can be turned to abut against the sealing parts to encapsulate the corresponding air exhaust pipe.

[0012] In some embodiments, the adjusting movable part is a rotatable adjusting valve, which is internally provided with an adjusting channel, and has at least two angular positions.

[0013] In each of the angular positions, the adjusting channel communicates at least one of the air exhaust pipes and the air inlet pipe, and the adjusting valve blocks the remaining air exhaust pipes.

[0014] In particular, the connection of the air inlet pipe and the at least two air exhaust pipes is a rotary cavity, and the adjusting valve is a rotary body and is arranged in the rotary cavity.

[0015] In some embodiments, the fresh-keeping device further comprises a control valve arranged on the air inlet pipe.

[0016] In particular, the control valve is a solenoid valve or a check valve.

[0017] The refrigerator according to the embodiments of the present application comprises a cabinet, at least two independent fresh-keeping chambers are arranged in the cabinet, and the refrigerator further comprises the above-mentioned fresh-keeping device for the refrigerator, and at least two oxygen enrichment assemblies are arranged corresponding to the at least two fresh-keeping chambers.

[0018] The additional aspects and advantages of the present application will be partially given in the following description, partially will become obvious from the following description, or will be understood through the practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0019] The above and / or additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings in which:

[0020] Figure 1 FIG. 1 is a structural schematic view of a refrigerator according to the embodiments of the present application;

[0021] Figure 2Structure diagram of the adjusting structure of the fresh-keeping device in another state of some embodiments;

[0022] Figure 3 For Figure 2 Structure diagram of the adjusting structure of the fresh-keeping device in another state of some embodiments;

[0023] Figure 4 For Figure 2 Structure diagram of the adjusting structure of the fresh-keeping device in another state of some embodiments;

[0024] Figure 5 For Structure diagram of the adjusting structure of the fresh-keeping device in another state of some embodiments;

[0025] Figure 6 Structure diagram of the adjusting structure of the fresh-keeping device in another state of some embodiments;

[0026] Figure 7 For Figure 6 Structure diagram of the adjusting structure of the fresh-keeping device in another state of some embodiments.

[0027] Reference signs:

[0028] Refrigerator 1000,

[0029] Fresh-keeping device 100,

[0030] Oxygen enrichment assembly 1,

[0031] Oxygen enrichment membrane 11, collection cavity 12,

[0032] Air extraction device 3, air extraction pump 31,

[0033] Air extraction pipe 41, first air extraction pipe 411, second air extraction pipe 412, sealing part 415,

[0034] Air inlet pipe 42,

[0035] Adjusting structure 53, adjusting movable part 531, adjusting plate 5311, adjusting valve 5312, adjusting channel 5313, adjusting driving part 532, control valve 54,

[0036] Turbulence fan 7,

[0037] Box 200, fresh-keeping chamber 210. DETAILED DESCRIPTION

[0038] The embodiments of the present application are described below in detail, examples of the embodiments are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, only for explaining the present application, and cannot be understood as a limitation of the present application.

[0039] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application. In addition, the features limited as "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0040] In the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0041] The following will be described with reference to Figures 1-7 The fresh-keeping device 100 for the refrigerator and the refrigerator 1000 according to the embodiments of the present application are described.

[0042] As shown in Figure 1 The refrigerator 1000 has at least two independent fresh-keeping chambers 210, and the positions of the fresh-keeping chambers 210 are not limited, which can be arranged in the same chamber of the refrigerator 1000, for example, can be arranged in the refrigerating chamber of the refrigerator 1000, or can be arranged in the intermediate chamber or other chamber (such as the freezing chamber) of the refrigerator 1000. Or at least two fresh-keeping chambers 210 are arranged in different chambers of the refrigerator 1000, for example, part of the fresh-keeping chambers 210 are arranged in the refrigerating chamber of the refrigerator 1000, and part of the fresh-keeping chambers 210 are arranged in the intermediate chamber or the freezing chamber of the refrigerator 1000. The at least two fresh-keeping chambers 210 are independent of each other, which means that after the refrigerator door is closed, the air between the fresh-keeping chambers 210 does not flow, forming a relatively independent fresh-keeping environment.

[0043] Referring to Figure 2The fresh-keeping device 100 comprises at least two oxygen-enriching assemblies 1, the at least two oxygen-enriching assemblies 1 are arranged corresponding to the at least two fresh-keeping chambers 210, each oxygen-enriching assembly 1 comprises at least one oxygen-enriching film 11 and a collecting cavity 12, and the oxygen-enriching assembly 1 is used for making oxygen in the fresh-keeping chamber 210 more permeate through the oxygen-enriching film 11 and enter the collecting cavity 12 than nitrogen. Thus, the oxygen-enriching assembly 1 can make the fresh-keeping chamber 210 form a gas atmosphere beneficial to food fresh-keeping, the gas atmosphere reduces the content of oxygen in the fruit and vegetable storage space, reduces the intensity of aerobic respiration of the fruit and vegetable, ensures the basic respiration, inhibits anaerobic respiration of the fruit and vegetable, and thus is beneficial to long-term fresh-keeping of the fruit and vegetable.

[0044] With reference to Figure 2 The fresh-keeping device 100 further comprises an air extraction device 3, the air extraction device 3 has an air inlet end, and the air inlet end is connected with the collecting cavity 12 of each oxygen-enriching assembly 1 through an air inlet pipe 42 and an air extraction pipe 41, so as to suck the gas in the collecting cavity 12 into the air extraction device 3.

[0045] Specifically, the air extraction device 3 comprises an air extraction pump 31, the air inlet end of the air extraction device 3 is the air inlet end of the air extraction pump 31, and the air inlet pipe 42 is connected to the air inlet end of the air extraction pump 31. The air extraction pump 31 is adopted, and has stable operation, high reliability and small size. Of course, an air blower can also be adopted to play the air extraction role. For the purpose of simplifying the description, the air extraction pump 31 is taken as an example in the following description.

[0046] That is to say, the air extraction pump 31 can extract the gas in the collecting cavity 12 outward, so as to make the air in the fresh-keeping chamber 210 flow to the oxygen-enriching assembly 1, and make part or all of the oxygen in the air in the fresh-keeping chamber 210 enter the collecting cavity 12 under the action of the oxygen-enriching assembly 1, and then be discharged from the fresh-keeping chamber 210 through the air extraction pipe 41 and the air extraction pump 31, so as to obtain the gas atmosphere in the fresh-keeping chamber 210, which is rich in nitrogen and poor in oxygen and is beneficial to food fresh-keeping.

[0047] With reference to Figure 2 The air extraction pipe 41 in the fresh-keeping device 100 is at least two, and each air extraction pipe 41 is connected with one collecting cavity 12. One end of the air inlet pipe 42 is connected with the air inlet end of the air extraction device 3, and the other end of the air inlet pipe 42 is connected with the at least two air extraction pipes 41, so as to suck the gas in the collecting cavity 12 into the air extraction device 3. That is to say, the air extraction device 3 is connected with the at least two air extraction pipes 41 through the air inlet pipe 42, and the number of pipes directly connected to the air extraction device 3 is reduced.

[0048] With reference to Figure 2 The fresh-keeping device 100 further comprises an adjusting structure 53, the adjusting structure 53 comprises an adjusting movable part 531, the adjusting movable part 531 is arranged at the connection position of the air inlet pipe 42 and the at least two air extraction pipes 41, the adjusting movable part 531 is arranged movably, and is used for controlling the opening and closing of the at least two air extraction pipes 41.

[0049] The fresh-keeping device 100 for the refrigerator can realize efficient oxygen reduction of the single air extraction device 3 on the multiple fresh-keeping chambers 210.

[0050] In the application, the adjusting movable part 531 is arranged at the connection position of the air inlet pipe 42 and the at least two air extraction pipes 41, so that the adjusting movable part 531 can adjust the flow state of the at least two air extraction pipes 41 during movement. The single adjusting movable part 531 can control the flow of the at least two air extraction pipes 41 at the same time, thereby controlling the oxygen extraction amount of the at least two fresh-keeping chambers 210 at the same time, which is beneficial to reducing the number of parts and realizing the differential setting of the oxygen content of the at least two fresh-keeping chambers 210.

[0051] It can be understood that, during use of the refrigerator 1000, a user will open the refrigerator door to take or place food. Therefore, after the fresh-keeping chamber 210 is opened each time, external air will be filled into the fresh-keeping chamber 210. After the refrigerator door is closed, the fresh-keeping chamber 210 is in an independent space, and the air extraction device 3 can extract air in the fresh-keeping chamber 210, and the oxygen content in the extracted air is high, so that the air amount and the oxygen content in the fresh-keeping chamber 210 decrease. After the refrigerator door is opened again, the above process is recycled again, so that the air amount and the oxygen content in the fresh-keeping chamber 210 are in a floating state. By arranging the adjusting structure 53, the flow state of the different air extraction pipes 41 can be controlled. Each air extraction pipe 41 can be conducted in a certain state to complete oxygen extraction, so that the oxygen content in the fresh-keeping chamber 210 can be kept in a certain floating range.

[0052] In the application, the flow state of the at least two air extraction pipes 41 is controlled by the single adjusting structure 53, and the adjusting structure 53 can have multiple implementation schemes. The adjusting structure 53 in the application further comprises an adjusting driving part 532 connected with the adjusting movable part 531 to drive movement of the adjusting movable part 531. The adjusting driving part 532 can be an electromagnetic valve or a motor structure. Preferably, an electromagnetic valve is adopted to reduce cost.

[0053] In some embodiments, as shown in Figure 2 and Figure 3 , an air inlet pipe 42 is connected with two air extraction pipes 41, and the adjusting movable part 531 is rotatably arranged at the connection position of the air inlet pipe 42 and the two air extraction pipes 41. The two air extraction pipes 41 and the air inlet pipe 42 constitute a three-way pipe, the number of the air extraction pipes 41 connected with the air inlet pipe 42 is limited to two, the rotatable adjusting movable part 531 is arranged at the connection position of the three pipes, the movement mode of the adjusting movable part 531 is single, and the two air extraction pipes 41 can reach different flow states only by being arranged at different rotation angle positions. The single movement direction enhances the control reliability.

[0054] For ease of description, in Figure 2 and Figure 3 For example, the exhaust pipe 41 includes a first exhaust pipe 411 and a second exhaust pipe 412 arranged in the left and right directions. One end of the first exhaust pipe 411 and the second exhaust pipe 412 are each connected to an oxygen-enriching component 1, and the other end of the first exhaust pipe 411 and the second exhaust pipe 412 are connected to the same air inlet pipe 42.

[0055] Specifically, the adjusting part 531 is an adjusting plate 5311, which can swing to cooperate with any of the suction pipes 41 to completely close the suction pipe 41 and completely open the other suction pipe 41.

[0056] In other words, the adjusting plate 5311 has two extreme positions. In one extreme position, when the adjusting plate 5311 swings to engage with the first suction pipe 411, the first suction pipe 411 is completely closed, and the second suction pipe 412 is completely opened. In the other extreme position, when the adjusting plate 5311 swings to engage with the second suction pipe 412, the second suction pipe 412 is completely closed, and the first suction pipe 411 is completely opened.

[0057] by Figure 2 For example, the adjusting plate 5311 has a limit position for swinging to the right. When it swings to the limit position, the adjusting plate 5311 completely closes the second exhaust pipe 412 and completely opens the first exhaust pipe 411. At this time, the exhaust device 3 operates, extracting gas from the left preservation compartment 210 to reduce oxygen levels in the left preservation compartment 210. Figure 3 For example, the adjusting plate 5311 has a limit position for swinging to the left. When it swings to the limit position to the left, the adjusting plate 5311 completely closes the first exhaust pipe 411 and completely opens the second exhaust pipe 412. At this time, the exhaust device 3 operates, extracting the gas in the right-side fresh-keeping compartment 210 to reduce the oxygen content of the right-side fresh-keeping compartment 210.

[0058] Optionally, the adjusting plate 5311 switches to its extreme position every first set time interval, allowing the two preservation compartments 210 to alternately reduce oxygen levels, thus achieving a balance in the oxygen content of the two preservation compartments 210. Further, optionally, the adjusting plate 5311 may fully open the first exhaust pipe 411 and the second exhaust pipe 412 at different times, thereby helping to maintain different oxygen levels in the two preservation compartments 210 and achieving a differentiated preservation environment.

[0059] In some specific embodiments, such as Figure 4As shown, the adjusting plate 5311 has a middle position, in which the adjusting plate 5311 opens both the two gas suction pipes 41. That is, the adjusting driving member 532 can make the adjusting plate 5311 stay and remain in the two extreme positions, and also can make the adjusting plate 5311 stay and remain in the middle position, so as to make the two fresh-keeping chambers 210 be oxygen-reduced at the same time.

[0060] Optionally, the middle position can be one, and in the middle position, the flow areas of the two gas suction pipes 41 to the gas inlet pipe 42 are equal, which is helpful to realize the same oxygen-reducing speed of the two fresh-keeping chambers 210.

[0061] Of course, in the scheme of the present application, the middle position can also be provided with at least two. In different middle positions, the flow areas of the first gas suction pipe 411 to the gas inlet pipe 42 are not equal. In different middle positions, the flow areas of the second gas suction pipe 412 to the gas inlet pipe 42 are also not equal.

[0062] Optionally, the inner walls of the two gas suction pipes 41 are respectively provided with sealing portions 415, and the adjusting plate 5311 can be turned to abut against the sealing portions 415 to seal the corresponding gas suction pipe 41. That is, as shown in Figure 2 and Figure 3 shown, the adjusting plate 5311 can abut against the sealing portion 415 at the corresponding position to seal the corresponding gas suction pipe 41 when turned to one of the extreme positions.

[0063] The sealing portion 415 can seal the gas suction pipe 41 when it is completely closed, so as to ensure the suction capacity of the gas suction device 3 to the other gas suction pipe 41. Moreover, the sealing portion 415 can also serve as a positioning structure of the adjusting plate 5311 in the extreme position, so as to avoid excessive rotation of the adjusting plate 5311 to cause loss or failure.

[0064] Optionally, the sealing portion 415 can be a block or a strip, or the sealing portion 415 can be an annular body.

[0065] Further optionally, the sealing portion 415 can be a rubber part, a plastic part, a silica gel part, etc.

[0066] Further, the sealing portion 415 is an elastic body, which has a certain elasticity to achieve the buffering protection of the adjusting movable part 531.

[0067] In the scheme of the present application, the number of the oxygen enrichment assemblies 1 can be more than two, and the number of the corresponding gas suction pipes 41 can be more than two. When the number of the gas suction pipes 41 is more than two, the connection of the gas suction pipes 41 to the gas inlet pipe 42 can be provided with at least two layers of pipe control structures.

[0068] For example, as shown in Figure 5In an example, there are three exhaust pipes 41 in total. Two of the exhaust pipes 41 are connected, and connected to an intake pipe 42, and an adjusting structure 53 is arranged at the connection, and the three constitute a first layer of pipe control structure. The intake pipe 42 of the first layer of pipe control structure is connected to another exhaust pipe 41 and another intake pipe 42, and another adjusting structure 53 is arranged at the connection, and the three constitute a second layer of pipe control structure. The intake pipe 42 of the first layer of pipe control structure is equivalent to the exhaust pipe 41 of the second layer of pipe control structure.

[0069] When there are four exhaust pipes 41 in total, the exhaust pipes 41 are combined in pairs. Two of the exhaust pipes 41 are connected, and connected to an intake pipe 42, and an adjusting structure 53 is arranged at the connection. Another two of the exhaust pipes 41 are connected, and connected to another intake pipe 42, and an adjusting structure 53 is arranged at the connection. In this way, a first layer of pipe control structure is formed. The two intake pipes 42 of the first layer of pipe control structure are equivalent to the exhaust pipes 41 of a second layer of pipe control structure, and the two intake pipes 42 are connected to an intake pipe 42, and an adjusting structure 53 is arranged at the connection, and the three constitute a second layer of pipe control structure.

[0070] In summary, the number of exhaust pipes 41 can be two or more than two, forming a binary tree structure. Each node of the binary tree structure is the connection between two exhaust pipes 41 and an intake pipe 42, and an adjusting structure 53 is arranged at the connection. In this way, the flow capacity of each exhaust pipe 41 can be adjusted.

[0071] In other embodiments, as shown in Figure 6 and Figure 7 , the adjusting movable part 531 is a rotatable adjusting valve 5312, and the adjusting valve 5312 is provided with an adjusting channel 5313 inside, and the adjusting valve 5312 has at least two angular positions. At each angular position, the adjusting channel 5313 is connected to at least one exhaust pipe 41 and an intake pipe 42, and the adjusting valve 5312 blocks the remaining exhaust pipes 41.

[0072] That is, the adjusting valve 5312 itself is a plug, which can block some exhaust pipes 41 by itself, and can also connect at least one exhaust pipe 41 and an intake pipe 42 through the internal adjusting channel 5313.

[0073] Here, the adjusting valve 5312 rotates as a whole, can withstand larger torque and bending moment, and has a lower probability of being twisted and broken, and has high reliability.

[0074] In the examples shown in Figure 6 and Figure 7 , the exhaust pipe 41 includes a first exhaust pipe 411 and a second exhaust pipe 412, the adjusting valve 5312 has two angular positions, and the adjusting channel 5313 is L-shaped. In Figure 6 , at one angular position, the adjusting channel 5313 connects the first exhaust pipe 411 and the intake pipe 42. In Figure 7In some embodiments, the adjustment passage 5313 is configured to connect the second exhaust pipe 412 with the air inlet pipe 42 in another rotational position. The adjustment valve 5312 is rotated by 90 degrees in the two rotational positions.

[0075] In some embodiments, the adjustment valve 5312 is configured to have more control over the connection of the at least two exhaust pipes 41. For example, in the example shown in Figure 6 When the exhaust pipe 41 is rotated by 180 degrees clockwise, the adjustment passage 5313 is not connected with the air inlet pipe 42, so that both the first exhaust pipe 411 and the second exhaust pipe 412 are blocked.

[0076] In some embodiments, the adjustment valve 5312 has a plurality of adjustment passages 5313, and the number of rotational positions in which the adjustment valve 5312 can stay and remain is greater than or equal to the number of adjustment passages 5313. In one rotational position, one adjustment passage 5313 connects one exhaust pipe 41 with the air inlet pipe 42. In another rotational position, another adjustment passage 5313 connects another exhaust pipe 41 with the air inlet pipe 42.

[0077] Specifically, the air inlet pipe 42 is connected with the at least two exhaust pipes 41 in a rotary cavity, and the adjustment valve 5312 is a rotary body and is arranged in the rotary cavity. In this way, not only is the sealing convenient, but also the rotary cavity has a righting effect on the rotary adjustment valve 5312, which helps to keep the adjustment valve 5312 from shaking around the rotation axis and improves the rotation stability and reliability. In this way, the probability of the adjustment valve 5312 being stuck by debris is further reduced.

[0078] In some embodiments, as shown in Figure 4 It can be understood that, because the fresh-keeping chamber 210 is exhausted, the air pressure in the fresh-keeping chamber 210 is low. When the air exhaust device 3 stops running, the control valve 54 can close the air inlet pipe 42 to prevent the air in the air exhaust device 3 from flowing back to the fresh-keeping chamber 210.

[0079] Optionally, the control valve 54 is an electromagnetic valve, so that the electric control is more flexible.

[0080] Optionally, the control valve 54 is a check valve. The check valve is a valve body used to prevent the reverse flow of fluid, also known as a one-way valve, a non-return valve or a backflow valve. The check valve can achieve the effect of stopping reverse flow through physical structure, and can achieve the effect of stopping reverse flow when power is off.

[0081] In some embodiments, as shown in Figure 2As shown, the adjusting structure 53 is arranged adjacent to the air extraction device 3, so that the adjusting structure 53 is conveniently detected whether it is blocked. In particular, the adjusting structure 53 and the air extraction device 3 can be arranged in a position of the refrigerator 1000 which is easy to open, so as to be conveniently replaced. For example, the adjusting structure 53 and the air extraction device 3 are arranged in a compressor compartment of the refrigerator 1000.

[0082] In some embodiments, as shown in FIG. 1, the fresh-keeping device 100 further comprises a turbulence fan 7 arranged in at least one fresh-keeping chamber 210. The turbulence fan 7 can promote the circulation of gas in the fresh-keeping chamber 210, so that the oxygen content in the fresh-keeping chamber 210 is uniform and consistent. Moreover, the turbulence fan 7 can promote the flow of oxygen through the oxygen-enriching membrane 11 and into the collection cavity 12, thereby improving the oxygen collection efficiency. Figure 2

[0083] In some embodiments, the oxygen-enriching membrane is a membrane material capable of selectively allowing oxygen to pass through, so that oxygen is enriched on one side of the membrane.

[0084] The basic structural hierarchy includes a surface layer, an active separation layer, and a support layer. The surface layer is the outermost part of the oxygen-enriching membrane 11 that contacts the gas in the fresh-keeping chamber 210. It usually has a special chemical composition and microstructure, and its main function is to preliminarily screen gas molecules. For example, the surface layer of some oxygen-enriching membranes 11 is composed of high-molecular materials with oxygenophilic groups that can preferentially adsorb oxygen molecules.

[0085] The surface layer is very thin, generally in the order of nanometers to microns. This is to reduce the path length of gas molecule diffusion, so that oxygen molecules can quickly enter the interior of the membrane for subsequent separation processes.

[0086] The active separation layer is the core structural part of the oxygen-enriching membrane 11. It is composed of polymer materials with special molecular structures, and there are certain gaps and channels between the molecular chains of these polymers. Its molecular structure can selectively allow oxygen molecules to pass through according to the differences in physical and chemical properties such as size, shape, and polarity between oxygen molecules and other gas molecules (such as nitrogen molecules). For example, oxygen molecules have a relatively small diameter, and under the action of a certain pressure, oxygen molecules can pass through the small channels in the active separation layer, while nitrogen molecules with a larger diameter are blocked. The active separation layer is also very thin, generally in the order of hundreds of nanometers, which can ensure a high oxygen permeation flux.

[0087] The support layer is located below the active separation layer and mainly functions to provide mechanical support for the active separation layer. Since the active separation layer is very thin and fragile, the support layer can prevent it from being damaged by external forces such as pressure and stretching during use.

[0088] ​The support layer is usually made of porous high-molecular material or inorganic material, which has high strength and stability. The pore structure thereof can allow gas to pass through smoothly in the vertical direction without causing great resistance to the permeation of oxygen. The thickness of the support layer is relatively thick, generally between tens of microns and hundreds of microns.

[0089] According to the refrigerator 1000 of the embodiment of the present application, referring to Figure 1 , comprising a cabinet 200, at least two independent fresh-keeping chambers 210 are arranged in the cabinet 200. The refrigerator 1000 further comprises the fresh-keeping device 100 for the refrigerator 1000, and at least two oxygen-enriching assemblies 1 are arranged corresponding to the at least two fresh-keeping chambers 210.

[0090] In this way, one air extraction device 3 is correspondingly connected to the at least two oxygen-enriching assemblies 1, and the scheme of efficiently reducing oxygen in multiple fresh-keeping chambers 210 by a single air extraction device 3 can be realized. The number of air extraction devices 3 is reduced, and the cost is reduced.

[0091] In some embodiments of the present application, each oxygen-enriching assembly 1 can be in a flat plate type and can be horizontally arranged on the top of the fresh-keeping chamber 210.

[0092] In some embodiments, the refrigerator 1000 has a compressor compartment for placing a compressor. The compressor is the core component of the refrigeration system of the refrigerator, which is equivalent to the "heart" of the refrigerator. It raises the pressure and temperature of the refrigerant gas by compression. The compressor compartment is located at the bottom of the refrigerator 1000, and the air extraction device 3 is arranged here, so that the vibration source is concentrated at the bottom and is eliminated by conduction to the ground.

[0093] According to other structures of the refrigerator 1000 of the present application, such as the compressor, they are all prior art, and will not be described here.

[0094] In the description of the present application, the description of the terms "embodiment", "example" and the like 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 the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0095] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and purposes of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A fresh-keeping device for a refrigerator, characterized by comprising: The refrigerator has at least two independent fresh-keeping chambers, and the fresh-keeping device comprises: at least two oxygen-enriching assemblies, each of which is arranged corresponding to one of the fresh-keeping chambers and comprises at least one oxygen-enriching membrane and a collecting cavity, and is configured to allow oxygen in the fresh-keeping chamber to permeate through the oxygen-enriching membrane and enter the collecting cavity more than nitrogen; an air extraction device; at least two air extraction pipes, each of which is connected to one of the collecting cavities; an air inlet pipe, one end of which is connected to an air inlet end of the air extraction device, and the other end of which is connected to the at least two air extraction pipes to suck the gas in the collecting cavities into the air extraction device; an adjusting structure, which comprises an adjusting movable part arranged at a connection between the air inlet pipe and the at least two air extraction pipes, and is configured to control the opening and closing of the at least two air extraction pipes.

2. The freshness keeping device for a refrigerator according to claim 1, characterized by One of the air inlet pipes is connected to two of the air extraction pipes, and the adjusting movable part is rotatably arranged at a connection between the air inlet pipe and the two air extraction pipes.

3. The freshness keeping apparatus for a refrigerator according to claim 2, characterized by The adjusting movable part is an adjusting plate, which can be swung to cooperate with any one of the air extraction pipes to completely close the air extraction pipe and completely open the other air extraction pipe.

4. The freshness keeping apparatus for a refrigerator according to claim 3, characterized by The adjusting plate has a middle position, in which the adjusting plate simultaneously opens the two air extraction pipes.

5. The freshness keeping apparatus for a refrigerator according to claim 3, characterized by The inner walls of the two air extraction pipes are respectively provided with sealing parts, and the adjusting plate can be turned to abut against the sealing parts to seal the corresponding air extraction pipes.

6. The freshness keeping device for a refrigerator according to claim 1, characterized by The adjusting movable part is a rotatable adjusting valve, which is provided with an adjusting passage, and has at least two angular positions. In each of the angular positions, the adjusting passage is connected to at least one of the air extraction pipes and the air inlet pipe, and the adjusting valve blocks the remaining air extraction pipes.

7. The freshness keeping apparatus for a refrigerator according to claim 6, characterized by The connection between the air inlet pipe and the at least two air extraction pipes is a rotary cavity, and the adjusting valve is a rotary body and is arranged in the rotary cavity.

8. The freshness keeping apparatus for a refrigerator according to claim 1, characterized by The fresh-keeping device further comprises a control valve arranged on the air inlet pipe.

9. The freshness keeping apparatus for a refrigerator according to claim 8, characterized by The control valve is an electromagnetic valve or a check valve.

10. A refrigerator comprising a cabinet, characterized by The box body is provided with at least two independent fresh-keeping chambers; The refrigerator further comprises the fresh-keeping device for a refrigerator according to any one of claims 1-9, and the at least two oxygen-enriching assemblies are arranged corresponding to the at least two fresh-keeping chambers.

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