CN215337246U

CN215337246U - Fresh-keeping refrigerator

Info

Publication number: CN215337246U
Application number: CN202120899038.2U
Authority: CN
Inventors: 陈佳弘; 李信良; 郭琨; 刘畅
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2021-04-28
Filing date: 2021-04-28
Publication date: 2021-12-28
Anticipated expiration: 2031-04-28

Abstract

The utility model discloses a preservation refrigerator, wherein the preservation refrigerator comprises: the fresh-keeping drawer is internally provided with a fresh-keeping space which is relatively isolated from air; the nitrogen-oxygen separation membrane module is used for separating oxygen from the fresh-keeping space; the adjustable gas regulating membrane component is arranged on the fresh-keeping drawer and comprises a gas regulating membrane for regulating the gas concentration of the fresh-keeping space relative to the external space; the adjustable controlled atmosphere membrane component is provided with different gears, and the different gears correspond to different controlled atmosphere membranes and have different gas permeability. The utility model solves the problems that the controlled atmosphere preservation control process is single and the food freshness is influenced in the prior art, improves the intelligence of controlled atmosphere preservation system control, and improves the freshness of the articles in the preservation drawer.

Description

Fresh-keeping refrigerator

Technical Field

The utility model relates to the technical field of refrigerators, in particular to a fresh-keeping refrigerator.

Background

With the continuous improvement of living standard and the improvement of dietary structure, people have higher and higher requirements on freshness of fruits and vegetables and durability of food preservation, so that the fruits and vegetables are required to be kept fresh in sense, and nutrient substances of the fruits and vegetables are required to be reserved to the maximum extent.

At present, the controlled atmosphere technology is common, the controlled atmosphere technology utilizes controlled atmosphere equipment to adjust the oxygen and carbon dioxide concentration in the fruit and vegetable drawer, and the oxygen concentration in the storage environment is reduced to improve the carbon dioxide concentration, so that the effects of fruit and vegetable aerobic respiration and self nutrient substance consumption are inhibited. However, in the prior art, the adjustment and control scheme for the gas concentration is simple, and the oxygen concentration is easily higher or the carbon dioxide concentration is easily higher. When the oxygen concentration is higher, fruits and vegetables can breathe aerobically, but when the carbon dioxide concentration is too high, the fruits and vegetables can breathe anaerobically, damage is caused, and the freshness of the fruits and vegetables is reduced. Meanwhile, the freshness of the fruits and vegetables can be influenced by the change of the humidity.

Aiming at the problems that the controlled atmosphere preservation control process is single and the food freshness is influenced in the related technology, no effective solution is provided at present.

SUMMERY OF THE UTILITY MODEL

The utility model provides a fresh-keeping refrigerator, which at least solves the problems that the fresh-keeping control process of air-conditioned fresh-keeping in the prior art is single and the food freshness is influenced.

In order to solve the above technical problems, according to an aspect of an embodiment of the present invention, a fresh-keeping drawer 10 is provided, in which a fresh-keeping space relatively isolating air is formed in the fresh-keeping drawer 10; a nitrogen-oxygen separation membrane module 20 for separating oxygen from the fresh-keeping space; the adjustable gas regulating membrane assembly 30 is arranged on the fresh-keeping drawer 10, and the adjustable gas regulating membrane assembly 30 comprises a gas regulating membrane 31 for adjusting the gas concentration of the fresh-keeping space relative to the external space; the adjustable modified atmosphere module 30 is provided with different gears, and the different gears correspond to different modified atmosphere modules 31 and have different gas permeability.

Further, the adjustable modified atmosphere module 30 further comprises: the vent hole 33 is used for communicating the fresh-keeping space with the external space; the adjusting piece 32 is used for adjusting the effective use area of the modified atmosphere film 31, and the adjusting piece 32 is also used for adjusting the opening and closing of the vent hole 33.

Further, the adjusting member 32 includes: adjusting the effective use area of the modified atmosphere film 31 to be a percent in a first state; adjusting the effective use area of the modified atmosphere film 31 to be a second state of b%; a third state that the effective use area of the modified atmosphere film 31 is adjusted to be c%; wherein a is more than b and less than c; the first state corresponds to a first gear of the modified atmosphere module 30, the second state corresponds to a second gear of the modified atmosphere module 30, and the third state corresponds to a third gear of the modified atmosphere module 30.

Further, the adjuster 32 also includes a ventilation state in which the ventilation hole 33 is opened; in the aeration state, the effective use area of the modified atmosphere film 31 is adjusted to be 0%.

Further, the modified atmosphere module 30 comprises a base plate 34, the modified atmosphere film 31 is mounted on the base plate 34, the vent hole 33 is opened on the base plate 34, and the adjusting member 32 is movably arranged on the base plate 34 to adjust the effective use area of the modified atmosphere film 31 and/or adjust the opening and closing of the vent hole 33.

Further, the adjusting member 32 is a baffle plate, which is slidably disposed on the base plate 34, and the baffle plate adjusts the effective use area of the modified atmosphere film 31 and/or adjusts the opening and closing of the vent hole 33 by shielding/avoiding.

Further, the tunable controlled atmosphere module 30 further comprises a slide rail 35, the slide rail 35 is mounted on the base plate 34, and the baffle is slidably mounted on the slide rail 35.

Further, in the fully closed state, the shutter is moved to a position where it completely blocks the atmosphere control film 31 and a position where it completely blocks the vent hole 33; in the modified atmosphere state, the baffle plate moves to a position for partially shielding the modified atmosphere film 31 and a position for completely shielding the vent hole 33; in the air-conditioning full-open state, the baffle plate moves to the position of avoiding the air-conditioning film 31 and the position of completely shielding the vent hole 33; in the ventilation state, the baffle plate moves to a position to escape the ventilation hole 33.

Further, the nitrogen-oxygen separation membrane module 20 includes: a nitrogen-oxygen separation membrane module 21 for separating nitrogen and oxygen; the vacuum pump 22 is connected with the nitrogen-oxygen separation membrane module 21 through an exhaust pipe 23, and the vacuum pump 22 exhausts oxygen in the fresh-keeping space through the nitrogen-oxygen separation membrane module 21; wherein, the nitrogen-oxygen separation membrane module 21 is at least partially arranged in the preservation drawer 10, and the vacuum pump 22 is arranged in the preservation drawer 10 or out of the preservation drawer 10.

Further, the nitrogen oxygen separation membrane module 20 includes a wind power part 24, and the wind power part 24 is provided at the nitrogen oxygen separation membrane module 21 for circulating air at the nitrogen oxygen separation membrane module 21 to prevent nitrogen from being accumulated.

Further, the wind power unit 24 is a fan mounted on the nitrogen-oxygen separation membrane module 21.

Further, there are two fans, and the two fans are disposed in parallel on the nitrogen-oxygen separation membrane module 21.

Further, the nitrogen-oxygen separation membrane module 21 includes a plurality of stacked nitrogen-oxygen separation membranes 211 therein, and the exhaust pipes 23 are respectively communicated with the oxygen filtration sides of the plurality of nitrogen-oxygen separation membranes 211.

Further, the adjustable modified atmosphere module 30 comprises a main shell and a multilayer modified atmosphere module mechanism arranged in the main shell, wherein the main shell is provided with a vent hole and a switch piece arranged at the vent hole; each layer of air-conditioned membrane mechanism comprises a substrate and an air-conditioned membrane, wherein the substrate is provided with a through hole, the air-conditioned membrane is movably arranged on the substrate, and the air-conditioned membrane mechanism comprises an air-conditioned state in which the air-conditioned membrane is covered on the through hole and a ventilation state in which the through hole is avoided; the adjustable modified atmosphere module 30 can select any one of the multi-layer modified atmosphere mechanisms to be in a modified atmosphere state so as to adjust the oxygen concentration and the carbon dioxide concentration of the fresh-keeping space relative to the external space.

Further, the air-adjusting film mechanism is three layers, wherein one layer of the air-adjusting film mechanism forms a bottom plate of the main shell, and the vent hole and the switch piece arranged at the vent hole are arranged at the top of the main shell; wherein, the moisture permeability of the first layer of air-conditioned membrane mechanism is less than that of the second layer of air-conditioned membrane mechanism is less than that of the third layer of air-conditioned membrane mechanism; when the first layer of air-conditioned membrane mechanism is in an air-conditioned state, the adjustable air-conditioned membrane assembly 30 is in a first gear; when the second layer of air-conditioned membrane mechanism is in an air-conditioned state, the adjustable air-conditioned membrane assembly 30 is in a second gear; when the third layer of air-conditioned membrane mechanism is in an air-conditioned state, the adjustable air-conditioned membrane module 30 is in a third gear.

The utility model provides a refrigerator and a control scheme, the refrigerator is provided with a gas regulating device, an adjustable controlled atmosphere membrane component of the gas regulating device is provided with different gears, and the different gears correspond to different controlled atmosphere membranes and have different gas permeability. In the using process of a user, the operation of the controlled atmosphere preservation system can be adjusted in real time to keep the appropriate gas environment in the drawer, so that the purpose of quickly adjusting the appropriate storage environment in the preservation drawer is achieved, the control intelligence of the controlled atmosphere preservation system is improved, and the freshness of the articles in the preservation drawer is improved.

Drawings

FIG. 1 is a schematic diagram of an alternative configuration of a crisper according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of an alternative construction of a tunable gas-regulating membrane module according to an embodiment of the utility model;

FIG. 3 is a schematic diagram of an alternative configuration of a nitrogen-oxygen separation membrane module according to an embodiment of the utility model;

FIG. 4 is a schematic diagram of an alternative configuration of a nitrogen-oxygen separation membrane module according to an embodiment of the present invention.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the utility model, as detailed in the appended claims.

Example 1

In a preferred embodiment 1 of the present invention, a crisper is provided, and fig. 1 shows an embodiment of the crisper of the present invention, which comprises a crisper drawer 10, a nitrogen-oxygen separation membrane module 20 and an adjustable modified atmosphere module 30. Wherein, a fresh-keeping space which is relatively isolated from air is formed in the fresh-keeping drawer 10, the adjustable gas regulating membrane module 30 is arranged on the fresh-keeping drawer 10, and the nitrogen-oxygen separation membrane module 20 is used for separating oxygen from the fresh-keeping space. The adjustable gas regulating membrane assembly 30 is arranged on the fresh-keeping drawer 10, and the adjustable gas regulating membrane assembly 30 comprises a gas regulating membrane 31 for adjusting the gas concentration of the fresh-keeping space relative to the external space; the adjustable modified atmosphere membrane module 30 is provided with different gears corresponding to different modified atmosphere membranes, including different membrane areas or different levels of membranes, having different gas permeability.

The modified atmosphere film can be used for adjusting the oxygen concentration, the carbon dioxide concentration and the water vapor concentration, namely the humidity of the fresh-keeping space relative to the external space.

By applying the technical scheme of the utility model, oxygen can be separated from the fresh-keeping space through the nitrogen-oxygen separation membrane component 20, so that a low-oxygen atmosphere is created in the fresh-keeping space, and the fresh-keeping of food materials such as fruits and vegetables is facilitated. The oxygen concentration and the carbon dioxide concentration in the fresh-keeping space can be finely adjusted through the air-adjusting film 31, the fresh-keeping space is used, the oxygen concentration in the fresh-keeping space can be further reduced under the respiration effect of the food materials such as fruits and vegetables, the carbon dioxide concentration is increased, therefore, the oxygen in the external space can be properly supplemented into the fresh-keeping space through the air-adjusting film 31, the carbon dioxide in the fresh-keeping space is scattered to the external space, and the anaerobic respiration of the food materials such as fruits and vegetables caused by the over-low oxygen concentration and the over-high carbon dioxide concentration in the fresh-keeping space is avoided. The effective use area of the modified atmosphere film 31 is adjusted through the adjusting piece 32, so that the adjusting effect of the modified atmosphere film 31 on the oxygen concentration and the carbon dioxide concentration in the fresh-keeping space can be adjusted, the situation that the oxygen is too much enters the fresh-keeping space to destroy the low-oxygen atmosphere is avoided, and the anaerobic respiration of food materials such as fruits and vegetables caused by too low oxygen concentration and too high carbon dioxide concentration in the fresh-keeping space is also avoided.

In addition, the air-conditioning film 31 can maintain the humidity in the fresh-keeping space at a certain level, which is beneficial to the fresh-keeping of food materials such as fruits and vegetables. The transmission rates of the modified atmosphere films for various gases, including mainly water vapor, oxygen and carbon dioxide, are shown in table 1 below.

TABLE 1 air permeability characteristics of modified atmosphere films

As shown in fig. 2, in the preferred embodiment, the adjustable gas-regulating membrane module 30 further includes a vent hole 33, the vent hole 33 is used for communicating the fresh-keeping space with the external space, and the adjusting member 32 is used for adjusting the opening and closing of the vent hole 33.

As shown in fig. 2, the damper 32 may optionally include a fully closed state, a modified atmosphere state, a modified fully open state, and a vent state. Wherein, in the fully closed state, the effective use area of the air adjusting film 31 is adjusted to be 0 percent, and the vent hole 33 is closed; in the air-conditioning adjusting state, the effective use area of the air-conditioning film 31 is adjusted to be 0-100%, and the vent hole 33 is closed; in the air-conditioning fully-opened state, the effective use area of the air-conditioning film 31 is adjusted to be 100%, and the vent hole 33 is closed; in the ventilation state, the ventilation hole 33 is opened.

In a preferred embodiment, the controlled atmosphere membrane 31 has an effective use area of 0% in the aeration state. As other alternative embodiments, it is also possible that no limitation on the effective usable area of the modified atmosphere film 31 is required after the vent hole 33 is opened in the venting state. It should be noted that, after the vent hole 33 is opened, the fresh food space and the external space are in a complete linkage state, so that the resistance to the flow of air is minimal, and thus the air flow preferentially passes through the vent hole 33.

As an alternative, in the solution of the present embodiment, the tunable gas atmosphere module 30 includes a substrate 34, the gas atmosphere film 31 is mounted on the substrate 34, the vent hole 33 is opened on the substrate 34, and the adjusting member 32 is movably disposed on the substrate 34 to adjust the effective use area of the gas atmosphere film 31 and/or adjust the opening and closing of the vent hole 33. When in use, the effective use area of the air-conditioning film 31 can be adjusted through the movable adjusting piece 32; the opening and closing of the ventilation hole 33 can also be regulated by the movable regulator 32.

As a preferred embodiment, as shown in fig. 2, the adjusting member 32 is a baffle plate, which is slidably disposed on the base plate 34 and is used for adjusting the effective use area of the modified atmosphere film 31 and/or adjusting the opening and closing of the vent hole 33 by shielding/avoiding. The control of the effective use area of the modified atmosphere film 31 and the control of the opening and closing of the vent hole 33 can be realized more conveniently by the design of the slidable baffle plate. When the effective use area of the air-conditioning film 31 needs to be adjusted, the baffle can selectively shield/avoid the action area of the air-conditioning film 31 and the fresh-keeping space or the external space; when the vent hole 33 needs to be opened, the baffle plate is made to avoid the vent hole 33, and when the vent hole 33 needs to be closed, the baffle plate is made to shield the vent hole 33.

Specifically, for several states of the adjusting member 32, in the fully closed state, the baffle plate moves to a position where it completely blocks the modified atmosphere film 31 and a position where it completely blocks the vent hole 33; in the modified atmosphere state, the baffle plate moves to a position for partially shielding the modified atmosphere film 31 and a position for completely shielding the vent hole 33; in the air-conditioning full-open state, the baffle plate moves to the position of avoiding the air-conditioning film 31 and the position of completely shielding the vent hole 33; in the ventilation state, the baffle plate moves to a position to escape the ventilation hole 33. As shown in fig. 2, the baffle plate can have two gears in the modified atmosphere state, and the effective area of the modified atmosphere film 31 is different under different gears. As other alternative embodiments, the damper may have more shift positions. For example, a first state in which the effective use area of the modified atmosphere film 31 is adjusted to a%; adjusting the effective use area of the modified atmosphere film 31 to be a second state of b%; a third state that the effective use area of the modified atmosphere film 31 is adjusted to be c%; wherein a is more than b and less than c; the first state corresponds to a first gear of the modified atmosphere module 30, the second state corresponds to a second gear of the modified atmosphere module 30, and the third state corresponds to a third gear of the modified atmosphere module 30.

More preferably, in the technical solution of the present embodiment, the tunable gas atmosphere module 30 further includes a slide rail 35, the slide rail 35 is installed on the base plate 34, and the baffle is slidably installed on the slide rail 35. Through the cooperation of slide rail 35 and baffle, can let the gliding more smooth and easy of baffle.

As shown in fig. 3, in the technical solution of this embodiment, the nitrogen-oxygen separation membrane module 20 includes a nitrogen-oxygen separation membrane module 21 and a vacuum pump 22, the nitrogen-oxygen separation membrane module 21 is used for separating nitrogen and oxygen, the vacuum pump 22 is connected to the nitrogen-oxygen separation membrane module 21 through an exhaust pipe 23, and the vacuum pump 22 exhausts oxygen from the fresh-keeping space through the nitrogen-oxygen separation membrane module 21. As shown in fig. 1, when in use, the nox separation membrane module 21 is disposed in the fresh keeping space, the vacuum pump 22 is disposed outside the fresh keeping space, the vacuum pump 22 acts on the nox separation membrane module 21 through the exhaust tube 23, the nox separation membrane module 21 only allows oxygen to pass through, and nitrogen remains in the fresh keeping space, and the oxygen separated by the nox separation membrane module 21 is discharged to the outside space through the exhaust tube 23 and the vacuum pump 22.

Optionally, in the technical solution of this embodiment, the nitrogen-oxygen separation membrane module 21 is at least partially disposed inside the crisper drawer 10, and the vacuum pump 22 is disposed outside the crisper drawer 10. Wherein, should guarantee at least that the nitrogen gas circulation's of separation of nitrogen oxygen separation membrane module 21 one side is located fresh-keeping drawer 10 when using, let whole nitrogen oxygen separation membrane module 21 also be feasible in fresh-keeping drawer 10 certainly. The vacuum pump 22 is arranged outside the preservation drawer 10 and connected with the nitrogen-oxygen separation membrane module 21 through the exhaust tube 23, and the position of the vacuum pump 22 can be the position adjacent to the preservation drawer 10, and also can be the position far away from the preservation drawer 10, such as the positions of an inner container of a refrigerator or a compressor bin, and the like, as long as the vacuum pump is connected with the nitrogen-oxygen separation membrane module 21 through the exhaust tube 23. In addition, the vacuum pump 22 may be disposed within the preservation drawer 10, such that the vacuum pump 22 exhausts oxygen out of the preservation drawer 10 through an exhaust pipe.

More preferably, as shown in fig. 3, the nitrogen and oxygen separation membrane module 20 includes a wind power part 24, and the wind power part 24 is provided at the nitrogen and oxygen separation membrane module 21. When in use, the wind power component 24 can make the air at the nitrogen-oxygen separation membrane module 21 circulate to prevent the nitrogen from gathering, thereby improving the separation efficiency of the nitrogen-oxygen separation membrane module 20 on the oxygen in the fresh-keeping space.

As an alternative embodiment, the wind power unit 24 is a fan mounted on the nitrogen-oxygen separation membrane module 21. Preferably, the number of the fans is two, and the two fans are arranged on the nitrogen-oxygen separation membrane module 21 in parallel, so that the air circulation efficiency in the fresh-keeping space is improved. As a further alternative, the wind member 24 may also be a ventilation board that is movable to circulate the air flow.

In a preferred embodiment 1 of the present invention, there is also provided a form of the adjustable modified atmosphere module 30, as shown in fig. 4, the adjustable modified atmosphere module 30 comprises a main housing and a multi-layer modified atmosphere mechanism arranged in the main housing, the main housing is provided with a vent hole 16 and an opening and closing member 15 arranged at the vent hole 16; each layer of air-conditioned membrane mechanism comprises a base plate and an air-conditioned membrane, wherein the base plate is provided with a through hole, and the air-conditioned membrane is movably arranged on the base plate, so that each layer of air-conditioned membrane mechanism is provided with a guide rail 11. The air adjusting film mechanism comprises an air adjusting state that the air adjusting film covers the through hole and a ventilation state that the air adjusting film avoids the through hole; the adjustable modified atmosphere module 30 can select any one of the multi-layer modified atmosphere mechanisms to be in a modified atmosphere state so as to adjust the oxygen concentration and the carbon dioxide concentration of the fresh-keeping space relative to the external space.

Preferably, the modified atmosphere membrane mechanism is three layers, as shown in fig. 4, comprising a modified atmosphere membrane 1(12), a modified atmosphere membrane 2(13) and a modified atmosphere membrane 3 (14); one layer of air-conditioning film forms a bottom plate of the main shell, and the vent hole and the switch piece arranged at the vent hole are arranged at the top of the main shell; wherein, the moisture permeability of the first layer of air-conditioned membrane mechanism is less than that of the second layer of air-conditioned membrane mechanism is less than that of the third layer of air-conditioned membrane mechanism; the air permeability of each modified atmosphere film is shown in table 2 below.

TABLE 2 air permeability characteristics of the modified atmosphere films of the respective layers

As shown in Table 2, the permeability of each air-conditioning film is gradually increased, the permeability of oxygen and carbon dioxide is gradually decreased, and different air-permeable films can be selected according to the permeability. Wherein the content of the first and second substances,

the baffle plate moves to the right to shield the air-permeable frame, and the mode is the closing mode of the air-permeable membrane;

the baffle plate, the air-conditioned membrane 2, the air-conditioned membrane 3 are moved to the left, and the air-conditioned membrane 1 is moved to the right, so that a first layer of air-conditioned membrane mechanism is used;

the baffle plate, the air-conditioned membrane 1, the air-conditioned membrane 3 move to the left, and the air-conditioned membrane 2 moves to the right, so that a second layer of air-conditioned membrane mechanism is used;

the baffle plate, the air-conditioned membrane 1, the air-conditioned membrane 2 are moved to the left, and the air-conditioned membrane 3 is moved to the right, so that a third layer of air-conditioned membrane mechanism is used.

Optionally, when the first layer of modified atmosphere mechanism is in a modified atmosphere state, the adjustable modified atmosphere membrane module 30 is in a first gear; when the second layer of air-conditioned membrane mechanism is in an air-conditioned state, the adjustable air-conditioned membrane assembly 30 is in a second gear; when the third layer of air-conditioned membrane mechanism is in an air-conditioned state, the adjustable air-conditioned membrane module 30 is in a third gear. Therefore, the moisture permeability of the tunable gas-controlled membrane assembly 30 increases gradually.

In addition, a humidity sensor is further arranged in the preservation drawer 10 and used for detecting the humidity in the preservation drawer so as to control the adjustable modified atmosphere membrane module 30 and the nitrogen-oxygen separation membrane module 20 according to the humidity and keep the appropriate humidity in the preservation drawer.

The refrigerator is provided with the gas regulating device, and the adjustable controlled atmosphere membrane component of the gas regulating device is provided with different gears, and the different gears correspond to different controlled atmosphere membranes and have different gas permeability. In the using process of a user, the operation of the controlled atmosphere preservation system can be adjusted in real time to keep the appropriate gas environment in the drawer, so that the purpose of quickly adjusting the appropriate storage environment in the preservation drawer is achieved, the control intelligence of the controlled atmosphere preservation system is improved, and the freshness of the articles in the preservation drawer is improved.

Other embodiments of the utility model will be apparent to those skilled in the art from consideration of the specification and practice of the utility model disclosed herein. This application is intended to cover any variations, uses, or adaptations of the utility model following, in general, the principles of the utility model and including such departures from the present disclosure as come within known or customary practice within the art to which the utility model pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the utility model being indicated by the following claims.

It will be understood that the utility model is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the utility model is limited only by the appended claims.

Claims

1. A crisper refrigerator, comprising:

the fresh-keeping drawer (10), the fresh-keeping space that has relatively isolated air is formed in the fresh-keeping drawer (10);

a nitrogen-oxygen separation membrane module (20) for separating oxygen from the fresh-keeping space;

the adjustable gas regulating membrane assembly (30) is arranged on the fresh-keeping drawer (10), and the adjustable gas regulating membrane assembly (30) comprises a gas regulating membrane (31) for adjusting the gas concentration of the fresh-keeping space relative to the external space; the adjustable controlled atmosphere membrane component (30) is provided with different gears, and the different gears correspond to different controlled atmosphere membranes (31) and have different gas permeability.

2. The crisper refrigerator of claim 1, wherein the adjustable gas-regulating membrane module (30) further comprises:

a vent hole (33), wherein the vent hole (33) is used for communicating the fresh-keeping space and the external space;

the adjusting piece (32), the adjusting piece (32) is used for adjusting the effective use area of the air adjusting film (31), and the adjusting piece (32) is also used for adjusting the opening and closing of the vent hole (33).

3. The crisper refrigerator of claim 2, characterized in that said adjustment member (32) comprises:

adjusting the effective use area of the modified atmosphere film (31) to be a% in a first state;

adjusting the effective use area of the modified atmosphere film (31) to be a second state of b%;

adjusting the effective use area of the modified atmosphere film (31) to be a third state of c%;

wherein a is more than b and less than c; the first state corresponds to a first gear of the modified atmosphere module (30), the second state corresponds to a second gear of the modified atmosphere module (30), and the third state corresponds to a third gear of the modified atmosphere module (30).

4. The crisper refrigerator of claim 3, characterized in that said regulator (32) further comprises a venting condition opening said venting aperture (33); in the aeration state, the effective use area of the air-conditioning film (31) is 0%.

5. The crisper of claim 3, wherein the adjustable gas-regulating membrane module (30) comprises a base plate (34), the gas-regulating membrane (31) is mounted on the base plate (34), the vent hole (33) opens on the base plate (34), and the adjusting member (32) is movably disposed on the base plate (34) to adjust an effective use area of the gas-regulating membrane (31) and/or to adjust opening and closing of the vent hole (33).

6. The crisper of claim 5, characterized in that the adjusting member (32) is a baffle slidably disposed on the base plate (34), the baffle adjusting the effective use area of the modified atmosphere film (31) and/or adjusting the opening and closing of the vent hole (33) in a sheltering/avoiding manner.

7. The crisper refrigerator of claim 6, wherein the variable atmosphere module (30) further comprises a sliding track (35), the sliding track (35) being mounted on the base plate (34), the baffle being slidably mounted on the sliding track (35).

8. The crisper refrigerator of claim 6,

in the fully closed state, the baffle plate moves to a position for completely blocking the modified atmosphere film (31) and a position for completely blocking the vent hole (33);

in a modified atmosphere state, the baffle plate moves to a position for partially blocking the modified atmosphere film (31) and a position for completely blocking the vent hole (33);

in the modified atmosphere fully-opened state, the baffle plate moves to a position avoiding the modified atmosphere film (31) and a position completely shielding the vent hole (33);

in the ventilation state, the baffle plate moves to a position avoiding the ventilation hole (33).

9. The crisper refrigerator of claim 1, wherein the nitrogen-oxygen separation membrane module (20) comprises:

a nitrogen-oxygen separation membrane module (21) for separating nitrogen and oxygen;

the vacuum pump (22) is connected with the nitrogen-oxygen separation membrane module (21) through an air exhaust pipe (23), and the vacuum pump (22) exhausts oxygen in the fresh-keeping space through the nitrogen-oxygen separation membrane module (21); wherein the nitrogen-oxygen separation membrane module (21) is at least partially arranged inside the crisper drawer (10), and the vacuum pump (22) is arranged inside the crisper drawer (10) or outside the crisper drawer (10).

10. The crisper of claim 9, characterized in that the membrane module (20) comprises a wind member (24), the wind member (24) being provided at the membrane module (21) for circulating air at the membrane module (21) to prevent nitrogen from accumulating.

11. The crisper refrigerator of claim 10, characterized in that the wind power unit (24) is a fan mounted on the membrane module (21).

12. The crisper refrigerator according to claim 11, characterized in that said fans are two, and two fans are arranged in parallel on said nitrogen-oxygen separation membrane module (21).

13. The crisper according to claim 9, characterized in that the nitrogen-oxygen separation membrane module (21) comprises a plurality of stacked nitrogen-oxygen separation membranes (211), and the air exhaust pipe (23) is respectively communicated with the oxygen filtration side of the plurality of nitrogen-oxygen separation membranes (211).

14. The crisper refrigerator of claim 1, wherein the tunable gas atmosphere module (30) comprises a main housing and a multi-layer gas atmosphere control membrane mechanism disposed in the main housing, the main housing having a vent hole and a switch member disposed at the vent hole;

each layer of air-conditioned membrane mechanism comprises a substrate and an air-conditioned membrane, wherein a through hole is formed in the substrate, the air-conditioned membrane is movably arranged on the substrate, and the air-conditioned membrane mechanism comprises an air-conditioned state in which the air-conditioned membrane is covered on the through hole and a ventilation state in which the air-conditioned membrane is avoided from the through hole;

the adjustable gas-regulating membrane component (30) can select any one layer of the multilayer gas-regulating membrane mechanism to be in a gas-regulating state so as to regulate the oxygen concentration and the carbon dioxide concentration of the fresh-keeping space relative to the external space.

15. The crisper refrigerator of claim 14, wherein the modified atmosphere mechanism is three layers, wherein one layer of the modified atmosphere mechanism forms a bottom plate of the main housing, and the vent hole and the switch member disposed at the vent hole are disposed at a top of the main housing; wherein, the moisture permeability of the first layer of air-conditioned membrane mechanism is less than that of the second layer of air-conditioned membrane mechanism is less than that of the third layer of air-conditioned membrane mechanism;

when the first layer of air-conditioned membrane mechanism is in an air-conditioned state, the adjustable air-conditioned membrane assembly (30) is in a first gear;

when the second layer of air-conditioned membrane mechanism is in an air-conditioned state, the adjustable air-conditioned membrane assembly (30) is in a second gear;

when the third layer of air-conditioned membrane mechanism is in an air-conditioned state, the adjustable air-conditioned membrane assembly (30) is in a third gear.