Food storage drawers and refrigerators

Abstract

This disclosure provides a food preservation drawer and a refrigerator. The food preservation drawer may include a drawer section, a humidity regulating section, and an oxygen reduction section. The humidity regulating section includes a humidity regulating material that can absorb moisture under normal pressure and release moisture under low pressure. In a first state, the inner cavity of the humidity regulating section is in communication with the inner cavity of the drawer section; in a second state, the inner cavity of the humidity regulating section can be in communication with the refrigerator's crisper compartment. This disclosure, through the configuration of the humidity regulating section and the oxygen reduction section, can regulate both the oxygen concentration and humidity within the drawer section, thereby better ensuring that both the oxygen concentration and humidity within the drawer section are at appropriate levels, achieving better preservation effects and improving the user experience.

Description

Technical Field

[0001] This disclosure relates to the field of refrigerator technology, and more particularly to a food preservation drawer and a refrigerator. Background Technology

[0002] Currently, most fruit and vegetable preservation drawers on the market rely on temperature control and pressure regulation to inhibit microbial growth and maintain freshness. However, this method is prone to condensation due to temperature differences and moisture buildup when the drawers are frequently opened and closed, leading to mold and rot. Furthermore, the vacuum pump continuously removes moisture from the storage space as it depressurizes, accelerating water loss from the produce. Additionally, this method lacks precise oxygen control within the drawer, making fruits and vegetables susceptible to oxidative browning during storage, which is detrimental to long-term preservation. Due to these reasons, the preservation effect of these technology-based preservation drawers is relatively poor. Utility Model Content

[0003] In view of this, in order to solve the technical problem of poor preservation effect of the existing preservation drawer, this disclosure provides a preservation drawer and a refrigerator.

[0004] According to a first aspect of the present disclosure, a food preservation drawer is provided, the food preservation drawer being disposed in the refrigerator compartment of a refrigerator, the food preservation drawer comprising:

[0005] Drawers are used to store food that needs to be kept fresh.

[0006] A humidity control unit includes a humidity control material, which has the property of absorbing moisture at normal pressure and releasing moisture at low pressure.

[0007] An oxygen-reducing section is used to reduce the oxygen content of the inner cavity of the drawer section;

[0008] The humidity regulating unit has a first state and a second state; in the first state, the inner cavity of the humidity regulating unit is in communication with the inner cavity of the drawer; in the second state, the inner cavity of the humidity regulating unit is in communication with the refrigerator compartment.

[0009] In one alternative implementation,

[0010] The humidity regulating unit includes a first door panel located on the side of the humidity regulating unit facing the inner cavity of the drawer portion; wherein, when the first door panel is in an open state, the inner cavity of the humidity regulating unit is in communication with the inner cavity of the drawer portion; when the first door panel is in a closed state, the inner cavity of the humidity regulating unit is in a closed state with respect to the inner cavity of the drawer portion; and / or,

[0011] The humidity regulating unit includes a second door panel located on the side of the humidity regulating unit facing the refrigerator compartment; wherein, when the second door panel is in the open state, the inner cavity of the humidity regulating unit is in communication with the refrigerator compartment; when the second door panel is in the closed state, the inner cavity of the humidity regulating unit is in the closed state with the refrigerator compartment.

[0012] In one alternative implementation,

[0013] The humidity regulating unit includes a frame for fixing the humidity regulating material.

[0014] In one alternative implementation,

[0015] The food storage drawer includes a humidity detection device and a control unit. The humidity detection device is used to detect the humidity inside the humidity regulating unit, and the humidity detection device is electrically connected to the control unit.

[0016] The control unit is configured to control the connection and disconnection states between the inner cavity of the humidity regulating unit and the refrigerator compartment based on the inner cavity humidity detected by the humidity detection device.

[0017] In one alternative implementation,

[0018] The humidity regulating unit includes a frame, and the humidity detection device is mounted on the frame.

[0019] In one alternative implementation,

[0020] The oxygen reduction section includes an oxygen reduction pump, an oxygen reduction membrane, and an oxygen reduction pipe. The oxygen reduction membrane is located between the inlet and outlet of the oxygen reduction pipe. The inlet of the oxygen reduction pipe is connected to the inner cavity of the drawer section. The oxygen reduction pump is used to pump the gas in the drawer section to the oxygen reduction pipe and output it along the oxygen reduction pipe.

[0021] In one alternative implementation,

[0022] The food preservation drawer includes an oxygen detection device and a control unit. The oxygen detection device is located inside the inner cavity of the drawer and is used to detect the oxygen concentration inside the drawer. The control unit is electrically connected to the oxygen detection device.

[0023] The control unit is configured to control the on and off states of the oxygen depressant pump based on the oxygen concentration in the cavity detected by the oxygen detection device.

[0024] In one alternative implementation,

[0025] The fresh-keeping drawer includes a first temperature and humidity detection device, a second temperature and humidity detection device, and a control unit. The first temperature and humidity detection device is disposed in the inner cavity of the drawer and is used to detect the inner cavity temperature and humidity of the drawer. The second temperature and humidity detection device is disposed on the door of the refrigerator and is used to detect the ambient temperature and humidity of the environment in which the refrigerator is located. The first temperature and humidity detection device and the second temperature and humidity detection device are electrically connected to the control unit.

[0026] The control unit is configured to: determine the current dew point temperature based on the internal cavity temperature and humidity detected by the first temperature and humidity detection device, and the ambient temperature and humidity detected by the second temperature and humidity detection device, and control the communication and disconnection states of the internal cavity of the humidity regulating unit and the internal cavity of the drawer unit based on the current dew point temperature and the internal cavity temperature detected by the first temperature and humidity detection device.

[0027] In one alternative implementation,

[0028] The humidity regulating material includes metal-organic framework materials.

[0029] According to a second aspect of the present disclosure, a refrigerator is provided, the refrigerator including a food preservation drawer as described in any of the first aspects.

[0030] The technical solutions provided by the embodiments of this disclosure can include the following beneficial effects: In this disclosure, the fresh-keeping drawer may include a drawer section, a humidity regulating section, and an oxygen reduction section. The humidity regulating section includes a humidity regulating part and a humidity regulating material within the humidity regulating part. The humidity regulating material can absorb moisture under normal pressure and release moisture under low pressure. In a first state, the inner cavity of the humidity regulating part is in communication with the inner cavity of the drawer section; in a second state, the inner cavity of the humidity regulating part can be in communication with the refrigerator's crisper compartment. Because the humidity regulating part is provided in this disclosure, when the oxygen reduction section is in operation, i.e., during the process of the oxygen reduction section evacuating and reducing oxygen in the inner cavity of the drawer section, the inner cavity of the humidity regulating part can be in communication with the inner cavity of the drawer section. In this case, due to the reduction in oxygen by evacuating and reducing oxygen, the pressure in the inner cavity of the drawer section decreases, and the humidity regulating material can release moisture under low pressure. Therefore, during the process of evacuating and reducing oxygen, the humidity in the inner cavity of the drawer section is maintained at a suitable level, preventing moisture loss from the fruits and vegetables stored in the drawer section that are awaiting preservation. Furthermore, when the humidity inside the drawer is high, leading to condensation, the humidity regulating section can be kept in communication with the drawer. The humidity regulating material absorbs moisture from the drawer, preventing condensation from causing fruits and vegetables to mold and rot. Additionally, in this disclosure, when the deoxygenation section is closed (i.e., no longer deoxygenating the drawer), if the humidity in the humidity regulating section is low, it can be kept in communication with the refrigerator compartment. In this case, the humidity regulating material can absorb moisture from the refrigerator compartment at normal pressure, replenishing its moisture and ensuring sufficient absorption for deoxygenation. In other words, this disclosure, through the humidity regulating section and the deoxygenation section, can regulate both the oxygen concentration and humidity inside the drawer, ensuring both are at appropriate levels for better preservation and improved user experience.

[0031] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0032] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the present invention and, together with the description, serve to explain the principles of the present invention.

[0033] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0035] Figure 1 This is a schematic diagram of a food storage drawer according to an exemplary embodiment.

[0036] Figure 2 This is another schematic diagram of a food storage drawer according to an exemplary embodiment.

[0037] Figure 3 This is a schematic diagram of a humidity control unit according to an exemplary embodiment.

[0038] Figure 4 This is a schematic diagram of a refrigerator according to an exemplary embodiment.

[0039] Figure 5 According to an exemplary embodiment, the ambient temperature T1 is 35°C, and the internal cavity temperature T2 at the moment the drawer 112 is opened is an average temperature T of 5°C. AVG The curve graph.

[0040] Figure 6 According to an exemplary embodiment, the ambient temperature T1 is 35°C, the ambient humidity H1 is 70%, the internal temperature T2 of the drawer 112 at the moment it is opened is 5°C, and the internal humidity H2 is an average humidity of 90%. AVG The curve graph.

[0041] in:

[0042] 1. Food storage drawer; 11. Drawer section; 111. Outer shell; 112. Drawer; 12. Humidity control section; 121. Humidity control material; 122. First door panel; 123. Second door panel; 124. Frame; 13. Oxygen reduction section; 131. Oxygen reduction pump; 132. Oxygen reduction mold; 133. Oxygen reduction pipe; 14. Humidity detection device; 15. First temperature and humidity detection device; 16. Second temperature and humidity detection device; 17. Oxygen detection device;

[0043] 10. Refrigeration compartment;

[0044] 100. Refrigerator. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0046] The following disclosure provides numerous different embodiments or examples for implementing various aspects of the present invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0047] For ease of description, spatial relative terms may be used in the text to describe the relative position or movement of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "front," "back," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure undergoes a positional flip, orientation change, or change of motion, these directional indications will change accordingly. For instance, an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0048] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this application. Therefore, the drawings only show the components related to this application and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0049] The embodiments of this application will be described below with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. This application can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be understood that the preferred embodiments are only for illustrating this application and are not intended to limit the scope of protection of this application.

[0050] To address the technical problem of poor preservation effect of existing food preservation drawers, this disclosure provides a food preservation drawer, a refrigerator, and a preservation control method.

[0051] In this disclosure, the fresh-keeping drawer may include a drawer section, a humidity regulating section, and an oxygen reduction section. The humidity regulating section includes a humidity regulating unit and a humidity regulating material within it. The humidity regulating material can absorb moisture under normal pressure and release moisture under low pressure. In a first state, the inner cavity of the humidity regulating unit is in communication with the inner cavity of the drawer section; in a second state, the inner cavity of the humidity regulating unit can be in communication with the refrigerator's crisper compartment. Because of the aforementioned humidity regulating unit, when the oxygen reduction section is in operation—that is, during the process of the oxygen reduction section evacuating and reducing oxygen in the inner cavity of the drawer section—the inner cavity of the humidity regulating unit can be in communication with the inner cavity of the drawer section. In this case, due to the reduction in oxygen through evacuation, the pressure inside the drawer section decreases, and the humidity regulating material can release moisture under low pressure. Therefore, during the process of evacuation and oxygen reduction, the humidity inside the drawer section remains at a suitable level, preventing moisture loss from fruits and vegetables stored in the drawer section. Furthermore, when the humidity inside the drawer is high, leading to condensation, the humidity regulating section can be kept in communication with the drawer. The humidity regulating material absorbs moisture from the drawer, preventing condensation from causing fruits and vegetables to mold and rot. Additionally, in this disclosure, when the deoxygenation section is closed (i.e., no longer deoxygenating the drawer), if the humidity in the humidity regulating section is low, it can be kept in communication with the refrigerator compartment. In this case, the humidity regulating material can absorb moisture from the refrigerator compartment at normal pressure, replenishing its moisture and ensuring sufficient absorption for deoxygenation. In other words, this disclosure, through the humidity regulating section and the deoxygenation section, can regulate both the oxygen concentration and humidity inside the drawer, ensuring both are at appropriate levels for better preservation and improved user experience.

[0052] In one exemplary embodiment, reference Figures 1 to 4As shown, a food preservation drawer 1 is provided, as well as a refrigerator 100 equipped with the food preservation drawer 1, and a food preservation control method applied to the food preservation drawer 1. In this embodiment, the food preservation drawer 1 may include a drawer section 11, a humidity regulating section 12, and an oxygen reduction section 13.

[0053] The drawer section 11 can be used to store fruits and vegetables awaiting preservation. The drawer section 11 may include a housing 111 and a drawer 112. The drawer 112 and the housing 111 can be connected by a slide rail to achieve smooth pulling and closing. The drawer section 11 may also include a sealing strip, which ensures a relatively sealed interior when the drawer section 11 is closed. The interior of the drawer section 11 is used to store food awaiting preservation. Additionally, the drawer 112 may have an adjustable partition inside to facilitate the storage of food of different volumes awaiting preservation. Of course, the drawer section 11 can also be constructed in other forms, which are not limited thereto.

[0054] The oxygen-reducing section 13 is used to reduce oxygen levels inside the drawer section 11. The oxygen-reducing section 13 can be located on the back of the drawer section 11 to avoid interference between the oxygen-reducing section 13 and the drawer 112. It should be noted that when the oxygen concentration inside the drawer section 11 is too high, it may cause oxidative browning of fruits and vegetables awaiting preservation, which is detrimental to their long-term storage. The oxygen-reducing section 13 can reduce the oxygen concentration inside the drawer section 11 by extracting oxygen, thereby extending the preservation effect of the food awaiting preservation.

[0055] The humidity regulating unit 12 may include a humidity regulating material 121. The humidity regulating material 121 has the property of absorbing moisture at normal pressure and releasing moisture at low pressure. For example, the humidity regulating material 121 may include a metal-organic framework (MOF) material. MOFs are three-dimensional porous crystalline materials formed by the self-assembly of metal ions or metal clusters and organic ligands through coordination bonds, possessing a highly porous structure and a large specific surface area. The metal ions can be zirconium (Zr), iron (Fe), zinc (Zn), copper (Cu), aluminum (Al), etc., and the organic ligands can be phthalic acid (BTC), imidazole ligands, trimesic acid (H3BTC), etc. MOFs have a stable mesoporous structure. MOFs can effectively adsorb moisture in a high-humidity environment at normal pressure. Under low pressure, the vapor pressure of moisture also decreases, and water molecules adsorbed in the pores of the MOFs detach from the material surface and enter the surrounding environment, thus achieving desorption.

[0056] The humidity regulating unit 12 has a first state and a second state. In the first state, the inner cavity of the humidity regulating unit 12 is in communication with the inner cavity of the drawer 11. In the second state, the inner cavity of the humidity regulating unit 12 is in communication with the refrigerator compartment 10.

[0057] In the preservation drawer 1 of this embodiment, when the deoxygenation unit 13 is in operation, that is, when the deoxygenation unit 13 is evacuating the inner cavity of the drawer 11 to reduce oxygen, the inner cavity of the humidity regulating unit 12 can be connected to the inner cavity of the drawer 11. In this case, due to the deoxygenation, the pressure in the inner cavity of the drawer 11 decreases, and the humidity regulating material 121 can release moisture under low pressure. Thus, the humidity in the inner cavity of the drawer 11 is kept at a suitable level during the deoxygenation process, and the moisture of the fruits and vegetables stored in the drawer 11 waiting to be preserved is prevented from being lost.

[0058] Furthermore, when the humidity inside drawer 11 is high, leading to condensation, for example, when switching drawer 11 from an open to a closed state, cooling of the interior of drawer 11 may occur. This cooling process can cause condensation, which can easily lead to mold and rot of fruits and vegetables. Therefore, in this situation, the interior of the humidity regulating unit 12 can be kept in communication with the interior of drawer 11. At this time, the humidity inside drawer 11 is high, and no de-oxygenation is being performed, so the pressure is at normal atmospheric pressure. The humidity regulating material 121 can then absorb the moisture inside drawer 11 to prevent condensation from causing mold and rot of fruits and vegetables awaiting preservation. Moreover, by absorbing moisture from the interior of drawer 11, water can be utilized efficiently, ensuring that the humidity regulating material 121 can absorb sufficient moisture to replenish the interior of drawer 11 during de-oxygenation, thus achieving water recycling.

[0059] In addition, when the deoxygenation section 13 is in the closed state, that is, when the deoxygenation section 13 no longer evacuates the inner cavity of the drawer section 11 to reduce oxygen, if the humidity of the inner cavity of the humidity regulating section 12 is low, the inner cavity of the humidity regulating section 12 can be controlled to be in communication with the refrigerator compartment 10. In this case, the humidity regulating material 121 can absorb the moisture in the refrigerator compartment 10 under normal pressure, thereby replenishing the moisture of the humidity regulating material 121. This can better ensure that the humidity regulating material 121 can absorb enough moisture so that it can replenish the moisture of the inner cavity of the drawer section 11 during deoxygenation.

[0060] This embodiment, through the setting of humidity adjustment unit 12 and oxygen reduction unit 13, can adjust both the oxygen concentration and humidity inside the drawer 11, thereby better ensuring that the oxygen concentration and humidity inside the drawer 11 are at a suitable level, so as to achieve better preservation effect and improve user experience.

[0061] In one exemplary embodiment, reference Figures 1 to 4As shown, a food preservation drawer 1 is provided, as well as a refrigerator 100 equipped with the food preservation drawer 1, and a food preservation control method applied to the food preservation drawer 1. In this embodiment, the humidity regulating unit 12 may include a first door panel 122. The first door panel 122 is located on the side of the humidity regulating unit 12 facing the inner cavity of the drawer portion 11. When the first door panel 122 is in the open state, the inner cavity of the humidity regulating unit 12 is in communication with the inner cavity of the drawer portion 11. In this state, the humidity regulating material 121 disposed in the humidity regulating unit 12 can absorb moisture from the inner cavity of the drawer portion 11 or release moisture into the inner cavity of the drawer portion 11 to ensure the humidity requirements of the inner cavity of the drawer portion 11. When the first door panel 122 is in the closed state, the inner cavity of the humidity regulating unit 12 is in a closed state. When the drawer portion 11 does not require dehumidification or humidification, the first door panel 122 can be controlled to be in the closed state to prevent the humidity regulating material 121 from excessively regulating the humidity of the inner cavity of the drawer portion 11.

[0062] For example, the first door panel 122 can be rotatably connected to the body of the humidity regulating unit 12 via a hinge. When installing the first door panel 122, the hinge and latch can be fixed to the body of the humidity regulating unit 12 with screws. The first door panel 122 is then hinged, thus achieving a rotatable connection between the first door panel 122 and the body of the humidity regulating unit 12. A sealing strip can also be provided between the first door panel 122 and the body of the humidity regulating unit 12 to ensure a tight seal when the first door panel 122 is closed. The switching between the closed and open states of the first door panel 122 can be achieved via a drive motor. When it is necessary to open the first door panel 122, the drive motor can extend a push rod to open the first door panel 122; when it is necessary to close the first door panel 122, the drive motor can retract the push rod to close the first door panel 122.

[0063] It should be noted that, in addition to the above-mentioned connection and state switching between the first door panel 122 and the humidity adjustment unit 12, other methods can also be used, and there is no limitation on this.

[0064] The humidity regulating unit 12 may further include a second door panel 123. The second door panel 123 is located on the side of the humidity regulating unit 12 facing the refrigerator compartment 10. When the second door panel 123 is open, the inner cavity of the humidity regulating unit 12 is in communication with the refrigerator compartment 10, allowing the humidity regulating material 121 to absorb moisture from the refrigerator compartment 10. When the second door panel 123 is closed, the inner cavity of the humidity regulating unit 12 is disconnected from the refrigerator compartment 10. For example, when oxygen reduction treatment is required for the drawer compartment 11, to ensure humidity balance within the drawer compartment 11, it is generally necessary to maintain communication between the inner cavity of the humidity regulating unit 12 and the inner cavity of the drawer compartment 11. In this case, the second door panel 123 needs to be closed to disconnect the inner cavity of the humidity regulating unit 12 from the refrigerator compartment 10, thereby preventing oxygen from the refrigerator compartment 10 from entering the drawer compartment 11 through the humidity regulating unit 12.

[0065] It should be noted that the connection method and driving method between the second door panel 123 and the main body of the humidity regulating unit 12 can be referred to the first door panel 122, and will not be described in detail here. In addition, since the second door panel 123 is located on the side of the humidity regulating unit 12 facing the refrigerator compartment 10, the second door panel 123 can be set as a transparent door panel so that the user can observe the status of the humidity regulating material 121 through the second door panel 123, and even if the humidity regulating material 121 is replaced.

[0066] The humidity regulating unit 12 may include a frame 124, which can be used to fix the humidity regulating material 121 to ensure the reliable placement of the humidity regulating material 121. The frame 124 can also be used to fix the first door panel 122 and the second door panel 123, that is, to make the structural layout more reasonable and eliminate the need for additional structures to fix the first door panel 122 and the second door panel 123.

[0067] The food storage drawer 1 may also include a humidity detection device 14 for detecting the humidity inside the humidity regulating unit 12, that is, for detecting the gas humidity inside the humidity regulating unit 12. The humidity detection device 14 may be a humidity sensor, which may be mounted on the frame 124.

[0068] The refrigerator drawer 1 may also include a control unit. The control unit can be used to control the state of the deoxygenation unit 13, for example, to control the deoxygenation unit 13 to be in an operating state, or to control the deoxygenation unit 13 to be in a closed state. The control unit can also be used to control whether the inner cavity of the humidity regulating unit 12 is connected to the inner cavity of the drawer 11, and whether the inner cavity of the humidity regulating unit 12 is connected to the refrigerator compartment 10.

[0069] For example, the control unit can control the inner cavity of the humidity regulating unit 12 and the inner cavity of the drawer 11 to be in a connected state by controlling the first door panel 122 to be in an open state; it can also control the inner cavity of the humidity regulating unit 12 and the inner cavity of the drawer 11 to be in a closed state by controlling the first door panel 122 to be in a closed state.

[0070] For example, the control unit can control the inner cavity of the humidity regulating unit 12 to be in communication with the refrigerator compartment 10 by controlling the second door panel 123 to be in the open state; or it can control the inner cavity of the humidity regulating unit 12 to be in the closed state by controlling the second door panel 123 to be in the closed state.

[0071] The humidity detection device 14 is electrically connected to the control unit. The control unit is configured to control the connection and disconnection states between the inner cavity of the humidity regulating unit 12 and the refrigerator compartment 10 based on the humidity detected by the humidity detection device 14.

[0072] In other words, after the humidity detection device 14 detects the humidity inside the humidity regulating unit 12, it can transmit it to the control unit. After obtaining the humidity inside the humidity regulating unit 12, the control unit controls the communication state between the inner cavity of the humidity regulating unit 12 and the refrigerator compartment 10 based on the humidity inside the humidity regulating unit 12.

[0073] For example, when the deoxygenation section 13 is closed, if the humidity detection device 14 detects that the humidity inside the humidity regulating section 12 is less than the set humidity, it indicates that the humidity regulating material 121 inside the humidity regulating section 12 has not absorbed enough moisture. In this case, the second door panel 123 can be opened, allowing the inside of the humidity regulating section 12 to communicate with the refrigerator compartment 10. At this time, the humidity regulating material 121 can absorb moisture from the refrigerator compartment 10, ensuring that it absorbs enough moisture to meet the humidification requirements of the drawer section 11 during the deoxygenation process. When the deoxygenation section 13 is closed, if the humidity inside the humidity regulating section 12 is greater than or equal to the set humidity, it indicates that the humidity regulating material 121 has absorbed enough moisture. In this case, the second door panel 123 can be closed, disconnecting the inside of the humidity regulating section 12 from the refrigerator compartment 10. It should be noted that when the deoxygenation unit 13 is in operation, since it is necessary to control the inner cavity of the humidity regulating unit 12 and the inner cavity of the drawer unit 11 to be in a connected state, it is necessary to simultaneously control the second door panel 123 to be in a closed state, so that the inner cavity of the humidity regulating unit 12 and the refrigerator compartment 10 are in a closed state.

[0074] It should be noted that the humidity setting can be adjusted according to actual needs, and its specific value is not limited. The humidity setting can be greater than or equal to 70% and less than or equal to 80%, for example, a humidity setting of 75%.

[0075] In this embodiment, the coordination between the control unit, the first door panel 122, the second door panel 123, and the humidity detection device 14 can improve the convenience and reliability of humidity adjustment in the inner cavity of the drawer section 11, better ensure that the humidity in the inner cavity of the drawer section 11 is at a suitable level, so as to achieve better preservation effect and improve user experience.

[0076] In one exemplary embodiment, reference Figures 1 to 4 As shown, a food preservation drawer 1 is provided, as well as a refrigerator 100 equipped with the food preservation drawer 1, and a food preservation control method applied to the food preservation drawer 1. In this embodiment, the oxygen reduction unit 13 includes an oxygen reduction pump 131, an oxygen reduction membrane 132, and an oxygen reduction pipe 133. The oxygen reduction membrane 132 is located between the inlet and outlet of the oxygen reduction pipe 133. The inlet of the oxygen reduction pipe 133 communicates with the inner cavity of the drawer 11. The oxygen reduction pump 131 is used to pump the gas in the drawer 11 to the oxygen reduction pipe 133 and output it along the oxygen reduction pipe 133.

[0077] The oxygen-reducing membrane 132 can be a hollow fiber membrane made of a polymer material, such as polyether, polyimide, and polysulfone. The surface of the oxygen-reducing membrane 132 can be hydrophobically treated, resulting in numerous micropores. These micropores allow small gas molecules to pass through, but block larger molecules such as water molecules and nitrogen from passing through. Simultaneously, the material is polar; oxygen has a high solubility in the membrane material and diffuses quickly, making it easier for oxygen to permeate. In contrast, other gases such as carbon dioxide have lower solubility in the membrane and diffuse more slowly, making them difficult to permeate. Therefore, when it is necessary to reduce oxygen in the interior of the drawer section 11, the oxygen reduction pump 131 (e.g., a small pump) can be turned on, and the gas in the interior of the drawer section 11 can move along the oxygen reduction pipe 133. The oxygen in the oxygen reduction membrane 132 facing the drawer section 11 (i.e., the side where the inlet of the oxygen reduction pipe 133 is located) moves through the micropores of the oxygen reduction membrane 132 to the side where the outlet of the oxygen reduction pipe 133 is located, and then is discharged outside the refrigerator 100, thereby reducing the oxygen concentration in the interior of the drawer section 11.

[0078] The food storage drawer 1 may include an oxygen detection device 17 (e.g., an oxygen sensor) for detecting the oxygen concentration inside the drawer section 11. A control unit may be electrically connected to the oxygen detection device 17. The control unit is configured to control the on and off states of the oxygen depressant pump 131 based on the oxygen concentration detected by the oxygen detection device 17 inside the drawer.

[0079] In other words, after the oxygen detection device 17 detects the oxygen concentration inside the drawer section 11, it can transmit the detected oxygen concentration to the control unit. The control unit can then obtain the oxygen concentration inside the drawer section 11 and control the state of the oxygen depletion pump 131 (including the open state and the closed state) based on the oxygen concentration, thereby realizing the state control of the oxygen depletion section 13 (including the running state and the closed state).

[0080] For example, if the control unit determines that the oxygen concentration inside the drawer section 11 is greater than the set concentration, it indicates that there is too much oxygen inside the drawer section 11, which may cause oxidation and browning of fruits and vegetables awaiting preservation. Therefore, oxygen reduction treatment is required. In this case, the oxygen reduction pump 131 can be turned on, thereby putting the oxygen reduction unit 13 into operation to extract oxygen from the drawer section 11 and achieve oxygen reduction treatment. If the control unit determines that the oxygen concentration inside the drawer section 11 is less than or equal to the set concentration, it indicates that there is too little oxygen inside the drawer section 11, and no oxygen reduction treatment is needed. In this case, the oxygen reduction pump 131 can be turned off, thereby putting the oxygen reduction unit 13 into operation.

[0081] It should be noted that the concentration can be set according to actual needs, and its specific value is not limited. The set concentration can be greater than or equal to 12% and less than or equal to 16%, for example, a set concentration of 14%.

[0082] When the deoxygenation unit 13 is in operation, while drawing oxygen from the inner cavity of the drawer section 11, some moisture may also be drawn out. Since some gas (such as oxygen and water vapor) in the inner cavity of the drawer section 11 is drawn out, the pressure in the inner cavity of the drawer section 11 may decrease, which may also cause moisture loss in fruits and vegetables. Therefore, in this case, the inner cavity of the humidity regulating unit 12 and the inner cavity of the drawer section 11 can be simultaneously controlled to be in a connected state. The humidity regulating material 121 in the humidity regulating unit 12 can then release moisture into the inner cavity of the drawer section 11, which has low humidity and low pressure, thereby maintaining the humidity balance in the inner cavity of the drawer section 11 during the deoxygenation process, better preventing moisture loss in fruits and vegetables, and better achieving the preservation effect of fruits and vegetables waiting to be preserved.

[0083] Additionally, it should be noted that during the deoxygenation process, the humidity regulating unit 12 needs to simultaneously humidify the interior of the drawer section 11 to maintain humidity balance. Therefore, before deoxygenation, it can be determined whether the humidity inside the humidity regulating unit 12 is greater than or equal to the set humidity. If the humidity inside the humidity regulating unit 12 is greater than or equal to the set humidity, the deoxygenation unit 13 can be controlled to operate to ensure that humidity balance is maintained inside the drawer section 11 while deoxygenating.

[0084] In one exemplary embodiment, reference Figures 1 to 4As shown, a food preservation drawer 1, a refrigerator 100 having the food preservation drawer 1, and a food preservation control method applied to the food preservation drawer 1 are provided. The food preservation drawer 1 is disposed in the refrigerator compartment 10 of the refrigerator 100. In this embodiment, the food preservation drawer 1 may include a first temperature and humidity detection device 1514 and a second temperature and humidity detection device 1614. The first temperature and humidity detection device 1514 is disposed in the inner cavity of the drawer portion 11 and is used to detect the inner cavity temperature and humidity of the drawer portion 11. The second temperature and humidity detection device 1614 is disposed on the door of the refrigerator 100 and is used to detect the ambient temperature and ambient humidity of the environment in which the refrigerator 100 is located. For example, both the first temperature and humidity detection device 1514 and the second temperature and humidity detection device 1614 may be temperature and humidity sensors.

[0085] The first temperature and humidity detection device 1514 and the second temperature and humidity detection device 1614 are electrically connected to the control unit. The control unit is configured to: determine the current dew point temperature based on the internal temperature and humidity detected by the first temperature and humidity detection device 1514 and the ambient temperature and humidity detected by the second temperature and humidity detection device 1614; and control the connection and disconnection states of the inner cavity of the humidity regulating unit 12 and the inner cavity of the drawer unit 11 based on the current dew point temperature and the internal temperature detected by the first temperature and humidity detection device 1514.

[0086] In other words, after the first temperature and humidity detection device 1514 detects the internal temperature and humidity of the drawer section 11, it can transmit this information to the control unit. Similarly, after the second temperature and humidity detection device 1614 detects the ambient temperature and humidity of the environment in which the refrigerator 100 is located, it can also transmit this information to the control unit. After receiving the temperature and humidity data, the control unit can determine the current dew point temperature based on this data. Then, based on the relationship between the current dew point temperature and the internal temperature of the drawer section 11, it controls the connection and disconnection states of the inner cavity of the humidity regulating unit 12 and the inner cavity of the drawer section 11.

[0087] For example, if the current dew point temperature is greater than or equal to the internal temperature of the drawer section 11, it indicates that condensation may occur. In this case, humidity regulating material 121 can be used to absorb the moisture in the internal cavity of the drawer section 11, thus controlling the internal cavity of the humidity regulating unit 12 to be in a connected state with the internal cavity of the drawer section 11. If the current dew point temperature is less than the internal temperature of the drawer section 11, it indicates that condensation will not occur, thus controlling the internal cavity of the humidity regulating unit 12 to be in a closed state with the internal cavity of the drawer section 11.

[0088] In this embodiment, when the food preservation drawer 1 is switched from the open state to the closed state, it needs to be cooled down first so that the temperature inside the drawer 1 reaches the set temperature (e.g., the temperature set by the user). During the cooling process, condensation can easily occur inside the drawer 11, which can cause fruits and vegetables to mold and rot. Therefore, during the cooling process, the current dew point temperature can be calculated in real time, and when the current dew point temperature is greater than or equal to the temperature inside the drawer 11, the inner cavity of the humidity regulating unit 12 is kept in communication with the inner cavity of the drawer 11, so that the humidity regulating material 121 absorbs the moisture inside the drawer 11 to avoid condensation and thus achieve a preservation effect.

[0089] In this embodiment, after the refrigerator drawer 1 is switched from the open state to the closed state, the gas distribution inside the drawer 11 is uneven for a period of time, resulting in a large error in the data detected by the temperature and humidity detection device 14. Therefore, in this embodiment, during the first period of time after the drawer 11 is switched from the open state to the closed state, the current dew point temperature is determined using a first strategy based on the internal temperature and humidity of the drawer 11, as well as the ambient temperature and humidity of the environment where the refrigerator 100 is located. After the first period of time after the drawer 11 is switched from the open state to the closed state, the current dew point temperature is determined using a second strategy based on the internal temperature and humidity of the drawer 11, as well as the ambient temperature and humidity of the environment where the refrigerator 100 is located.

[0090] It should be noted that the aforementioned first duration can be set according to the actual situation and is not limited thereto. For example, the first duration could be 5 minutes. Furthermore, the first and second strategies can also be determined according to the actual situation, and their specific content is not limited.

[0091] In some implementations...

[0092] refer to Figures 1 to 6 As shown, after the food storage drawer 1 is switched from the open state to the closed state, the gas distribution inside drawer 112 is uneven within 5 minutes, and the data error of the temperature and humidity sensor is relatively large. Therefore, the current dew point temperature is calculated in two cases:

[0093] 1. Calculation of dew point temperature within 5 minutes after the user closes drawer 112 (i.e., the first strategy).

[0094] (1) Average temperature T AVG Calculation

[0095]

[0096] In the formula: T AVG It refers to the average temperature (°C) inside drawer 112 at the moment the food storage drawer 1 is opened;

[0097] T2 refers to the internal temperature (°C) of the drawer section 11 at the instant the food storage drawer 1 is opened;

[0098] T1 refers to the temperature (°C) of the refrigerator 100 at the moment when the food storage drawer 1 is opened;

[0099] The system database of refrigerator 100 stores a large number of average temperatures T corresponding to different ambient temperatures and the internal cavity temperatures of drawer section 11. AVG A graph showing the change over time, based on the calculated T. AVG Find the corresponding T on the curve AVG The value is the zero point value, and T will be within 5 minutes thereafter. AVG The value corresponds to the numerical value on the curve. Example: Figure 5 The figure shows the average temperature T1 when the ambient temperature T1 is 35℃ and the internal temperature T2 when drawer 112 is opened is 5℃. AVG The curve graph.

[0100] (2) Average humidity H AVG Calculation

[0101] ① Calculate the saturated water vapor pressures e1 and e2 outside the refrigerator 100 and inside the crisper drawer 1.

[0102]

[0103] In the formula: A = 8.071, B = 1730.63, C = 233.43

[0104] e2 refers to the saturated water vapor pressure (kPa) inside drawer 112 at the moment it is opened.

[0105] ② Calculate the saturated water vapor pressure at the average temperature.

[0106]

[0107] ③ Calculate the actual water vapor pressures f1 and f2

[0108] f1 = H1 × e1

[0109] f2=H2×e2

[0110] In the formula: f2 refers to the actual water vapor pressure (kPa) inside drawer 112 at the instant the food storage drawer 1 is opened.

[0111] ④ Calculate the actual average water vapor pressure f AVG

[0112]

[0113] In the formula: f AVGThis refers to the actual average water vapor pressure (kPa) inside drawer 112 at the moment the food storage drawer 1 is opened.

[0114] ⑤ Calculate the average humidity

[0115]

[0116] In the formula: H AVG This refers to the average humidity (%) inside drawer 112 at the moment it is opened.

[0117] The system database can store a large number of average humidity H corresponding to different ambient temperatures and humidity levels and drawer 112 temperature and humidity. AVG The curves showing the changes over time were obtained by using the ambient temperature and humidity T1 and H1, and the temperature and humidity T2 and H2 inside drawer 112 at the moment the drawer was opened. The curves for H over 5 minutes were calculated. AVG The value corresponds to the numerical value on the curve. Example: Figure 6 The diagram shows the ambient temperature T1 as 35℃, the ambient humidity H1 as 70%, the internal temperature T2 of the food storage drawer 112 at the instant it is opened as 5℃, and the internal humidity H2 as 90%, with an average humidity H. AVG The curve graph.

[0118] (3) Dew point temperature T D Calculation

[0119] According to H AVG Estimated average water vapor pressure f AVG :

[0120] f AVG =H AVG ×e AVG

[0121] Based on the average water vapor pressure f AVG Find the nearest saturated water vapor pressure value in the table; the corresponding temperature is the current dew point temperature T. D .

[0122] Table 1. Relationship between temperature and saturated water vapor pressure (partial)

[0123] 0 0.6112 11 1.3129 1 0.6571 12 1.4027 2 0.7060 13 1.4979 3 0.7581 14 1.5988 4 0.8135 15 1.7056 5 0.8726 16 1.8185 6 0.9353 17 1.9380 7 1.0021 18 2.0644 8 1.0730 19 2.1978 9 1.1482 20 2.3388 10 1.2281 21 2.4877 ... ... ... ...

[0124] 2. Calculation of the current dew point temperature 5 minutes after the food storage drawer 1 is switched from open to closed (i.e., the second strategy).

[0125] (1) Calculation of average temperature

[0126]

[0127] In the formula: T AVGIt refers to the average temperature (°C) inside drawer 112 at the moment the food storage drawer 1 is opened;

[0128] T2 refers to the internal temperature (°C) of the drawer section 11 of the food storage drawer 1;

[0129] T1 refers to the ambient temperature (°C) of the environment in which the refrigerator 100 is located;

[0130] (2) Average humidity H AVG Calculation

[0131] ① Calculate the saturated water vapor pressures e1 and e2 outside the refrigerator 100 and inside the drawer 112.

[0132]

[0133] In the formula: A = 8.071, B = 1730.63, C = 233.43

[0134] ② Calculate the saturated water vapor pressure at the average temperature.

[0135]

[0136] ③ Calculate the actual water vapor pressures f1 and f2

[0137] f1 = H1 × e1

[0138] f2=H2×e2

[0139] ④ Calculate the actual average water vapor pressure f AVG

[0140]

[0141] ⑤ Calculate the average humidity

[0142]

[0143] (3) Dew point temperature T D Calculation

[0144] Based on the average water vapor pressure f AVG Find the nearest saturated water vapor pressure value in the table; the corresponding temperature is the current dew point temperature T. D .

[0145] Table 2. Relationship between temperature and saturated water vapor pressure (partial)

[0146]

[0147]

[0148] It should be noted that the first and second strategies can be implemented in other ways besides those described above, and there are no limitations on this.

[0149] In this embodiment, when a user needs to store food to be preserved, they can open the preservation drawer 1, place the food inside, and then close the drawer 112. The control unit can then control the refrigeration components to operate, cooling the preservation drawer 1. During the cooling process, the first temperature and humidity detection device 1514 can detect the ambient temperature T1 and ambient humidity H1, and the second temperature and humidity detection device 1614 can detect the internal temperature T2 and internal humidity H2 of the drawer 11. The control unit can calculate the current dew point temperature TD according to the timer's calculation logic based on the time duration, and compare the internal temperature T2 of the drawer 11 with the current dew point temperature TD in real time.

[0150] Specifically, when the internal temperature T2 of drawer 11 is less than or equal to the current dew point temperature TD, the vapor pressure inside the food storage drawer 11 is greater than the saturated vapor pressure, making condensation easy. The control unit can then keep the first door panel 122 open, using MOFs material to dehumidify the internal cavity of drawer 11, thus lowering the vapor pressure inside drawer 112 below the saturated vapor pressure and preventing condensation. As the vapor pressure f2 inside drawer 112 gradually decreases, the average vapor pressure f... AVG As the temperature decreases, the dew point temperature TD read from the table also decreases. When the dew point temperature TD drops below the temperature T2 of drawer 112, it indicates that the vapor pressure inside drawer 112 has dropped below the saturated vapor pressure, making condensation less likely. The control unit can then keep the first door panel 122 closed. Additionally, during the cooling process, it can simultaneously determine whether the internal temperature T2 of drawer 11 has reached the set temperature T0 (T0 can be between 2℃ and 8℃). If the internal temperature T2 of drawer 11 has reached the set temperature T0, the refrigeration unit can be stopped to cease cooling the refrigerator drawer 1. Otherwise, the refrigeration unit will continue operating to continue cooling the refrigerator drawer 1 until it reaches the set temperature. Once the internal temperature of drawer 11 reaches the set temperature, it indicates that the storage environment of drawer 11 has met the set storage conditions.

[0151] It's important to note that saturated vapor pressure refers to the vapor pressure at a specific temperature when water vapor and liquid water reach dynamic equilibrium. When the water vapor content in the air reaches the saturated vapor pressure at that temperature, the excess water vapor condenses into liquid water, forming condensation. The amount of water vapor (saturated vapor) that the air can hold decreases as the ambient temperature decreases; that is, saturated vapor pressure is positively correlated—vapor pressure decreases as temperature decreases and increases as temperature increases. Dew point temperature refers to the temperature at which water vapor in the air begins to condense at a given humidity level. If the surface temperature of an object is lower than the dew point temperature, water vapor will condense into liquid water on that surface, forming condensation.

[0152] In this embodiment, after cooling is completed (i.e., after the storage environment of drawer 11 reaches the set storage conditions), the humidity detection device 14 can detect the internal humidity Hs of the humidity regulating unit 12 in real time. When the internal humidity Hs of the humidity regulating unit 12 does not reach the set humidity HL (HL can be between 70% and 80%), the control unit can control the second door panel 123 to be in the open state, so that the MOFs material can absorb moisture from the refrigerator compartment 10; when the internal humidity Hs of the humidity regulating unit 12 reaches the set humidity HL (70% to 80%), the control unit can control the second door panel 123 to be in the closed state. It should be noted that the first door panel 122 must remain closed throughout the above process. In this embodiment, by controlling the second door panel 123 as described above, it is possible to better ensure that the MOFs material absorbs enough moisture to supply humidification to the freshness drawer 1 during deoxygenation.

[0153] When the humidity Hs inside the humidity regulating unit 12 reaches the required level (i.e., the set humidity is achieved), the control unit can activate the deoxygenation pump 131 to deoxygenate the interior of the drawer 11, thereby reducing the pressure inside the drawer 11. Simultaneously, the first door panel 122 can be opened, allowing the MOFs material to desorb under low pressure, thus humidifying the interior of the drawer 11. It should be noted that because deoxygenation during the degassing process removes some moisture from the freshness drawer 1, timely replenishment can prevent fruits and vegetables from losing moisture and improve the preservation effect.

[0154] It should be noted that after the fresh food drawer 1 is switched from the open state to the closed state, before the fresh food drawer 1 is subjected to the first oxygen reduction treatment, the oxygen concentration inside the drawer 11 is generally greater than or equal to the set concentration. Therefore, as long as the humidity inside the humidity regulating unit 12 is determined to meet the requirements, the oxygen reduction pump 131 can be directly controlled to start in order to carry out the oxygen reduction treatment.

[0155] During the deoxygenation process, the oxygen detection device 17 can monitor the oxygen concentration C2 inside the drawer section 11 in real time. When C2 is less than or equal to the set concentration CL (the set concentration can be between 12% and 14%), the control unit can control the deoxygenation pump 131 to be in the off state, the deoxygenation section 13 stops working, and at the same time, it can control the first door panel 122 to be in the closed state, so that fruits and vegetables can be temporarily stored.

[0156] During the temporary storage of fruits and vegetables, the humidity detection device 14 can continuously monitor the humidity inside the humidity regulating unit 12 and control the state of the second door panel 123 based on the detected humidity and the set humidity, thereby keeping the humidity inside the humidity regulating unit 12 above the set humidity. At the same time, the oxygen detection device 17 can continuously monitor the oxygen concentration inside the drawer 11. When the detected oxygen concentration exceeds the set concentration, the control unit can control the oxygen de-oxygenation pump 131 to be turned on, so that the inside of the drawer 11 is maintained at a low oxygen level.

[0157] In this embodiment, the hygroscopic properties of MOFs materials absorb moisture when the dew point temperature is reached after the user opens and closes the food storage drawer 1, preventing condensation caused by temperature differences. After eliminating the temperature difference, the water vapor in the MOFs materials is desorbed and released by depressurization and oxygen reduction, maintaining the humidity balance inside the food storage drawer 1 and improving food preservation. The oxygen reduction section 13 maintains a low-oxygen state inside the food storage drawer 1, reducing the respiration and oxidation of fruits and vegetables, inhibiting microbial growth, and extending the storage period of fruits and vegetables.

[0158] Compared to traditional physical insulation and dehumidification equipment, this embodiment utilizes the properties of MOFs materials, requiring no additional energy consumption and thus being more energy-efficient. The MOFs material is integrated into the low-temperature oxygen-reducing preservation drawer 1, achieving a unified design that improves ease of use and reliability. The low-temperature oxygen-reducing technology slows down the respiration and oxidation processes of fruits and vegetables, maintaining their high quality during storage. Combined with the intelligent dehumidification and humidification of the storage space using MOFs materials, condensation is reduced, preventing mold and rot.

[0159] Those skilled in the art will further recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of hardware and software, the components and steps of the various examples have been generally described in terms of functionality in the foregoing description. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0160] It should be noted that the terms "one implementation," "embodiment," "exemplary embodiment," and "some embodiments" used in the specification indicate that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Moreover, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not, is within the knowledge scope of those skilled in the art.

[0161] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or air conditioner that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or air conditioner. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or air conditioner that includes said element.

[0162] The above embodiments are merely preferred embodiments provided to fully illustrate this application, and the scope of protection of this application is not limited thereto. Equivalent substitutions or modifications made by those skilled in the art based on this application are all within the scope of protection of this application.

Claims

1. A crisper drawer characterized by, The food storage drawer is located in the refrigerator compartment, and the food storage drawer includes: Drawers are used to store food that needs to be kept fresh. A humidity control unit includes a humidity control material, which has the property of absorbing moisture at normal pressure and releasing moisture at low pressure. An oxygen-reducing section is used to reduce the oxygen content of the inner cavity of the drawer section; The humidity regulating unit has a first state and a second state; in the first state, the inner cavity of the humidity regulating unit is in communication with the inner cavity of the drawer; in the second state, the inner cavity of the humidity regulating unit is in communication with the refrigerator compartment.

2. The food preservation drawer according to claim 1, characterized in that, The humidity regulating unit includes a first door panel located on the side of the humidity regulating unit facing the inner cavity of the drawer portion; wherein, when the first door panel is in an open state, the inner cavity of the humidity regulating unit is in communication with the inner cavity of the drawer portion; when the first door panel is in a closed state, the inner cavity of the humidity regulating unit is in a closed state with respect to the inner cavity of the drawer portion; and / or, The humidity regulating unit includes a second door panel located on the side of the humidity regulating unit facing the refrigerator compartment; wherein, when the second door panel is in the open state, the inner cavity of the humidity regulating unit is in communication with the refrigerator compartment; when the second door panel is in the closed state, the inner cavity of the humidity regulating unit is in the closed state with the refrigerator compartment.

3. The crisper drawer of claim 2, wherein, The humidity regulating unit includes a frame for fixing the humidity regulating material.

4. The crisper drawer of claim 1, wherein, The food storage drawer includes a humidity detection device and a control unit. The humidity detection device is used to detect the humidity inside the humidity regulating unit, and the humidity detection device is electrically connected to the control unit. The control unit is configured to control the connection and disconnection states between the inner cavity of the humidity regulating unit and the refrigerator compartment based on the inner cavity humidity detected by the humidity detection device.

5. The crisper drawer of claim 4, wherein, The humidity regulating unit includes a frame, and the humidity detection device is mounted on the frame.

6. The crisper drawer of claim 1, wherein, The oxygen reduction section includes an oxygen reduction pump, an oxygen reduction membrane, and an oxygen reduction pipe. The oxygen reduction membrane is located between the inlet and outlet of the oxygen reduction pipe. The inlet of the oxygen reduction pipe is connected to the inner cavity of the drawer section. The oxygen reduction pump is used to pump the gas in the drawer section to the oxygen reduction pipe and output it along the oxygen reduction pipe.

7. The crisper drawer of claim 6, wherein, The food preservation drawer includes an oxygen detection device and a control unit. The oxygen detection device is located inside the inner cavity of the drawer and is used to detect the oxygen concentration inside the drawer. The control unit is electrically connected to the oxygen detection device. The control unit is configured to control the on and off states of the oxygen depressant pump based on the oxygen concentration in the cavity detected by the oxygen detection device.

8. The crisper drawer of claim 1, wherein, The fresh-keeping drawer includes a first temperature and humidity detection device, a second temperature and humidity detection device, and a control unit. The first temperature and humidity detection device is disposed in the inner cavity of the drawer and is used to detect the inner cavity temperature and humidity of the drawer. The second temperature and humidity detection device is disposed on the door of the refrigerator and is used to detect the ambient temperature and humidity of the environment in which the refrigerator is located. The first temperature and humidity detection device and the second temperature and humidity detection device are electrically connected to the control unit. The control unit is configured to: determine the current dew point temperature based on the internal cavity temperature and humidity detected by the first temperature and humidity detection device, and the ambient temperature and humidity detected by the second temperature and humidity detection device, and control the communication and disconnection states of the internal cavity of the humidity regulating unit and the internal cavity of the drawer unit based on the current dew point temperature and the internal cavity temperature detected by the first temperature and humidity detection device.

9. The crisper drawer of any of claims 1-8, wherein, The humidity regulating material includes metal-organic framework materials.

10. A refrigerator characterized by comprising: The refrigerator includes a food preservation drawer as described in any one of claims 1-9.

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