refrigerator

Abstract

This application discloses a refrigerator, which includes: a first storage section (1) including a first receiving cavity (101), a first oxygen separation component (102) disposed in the first receiving cavity (101) and allowing oxygen to pass through, and a first pump (103) configured to draw air from the first receiving cavity (101) to the outside of the first receiving cavity (101) through the first oxygen separation component (102); a second storage section (2) including a second receiving cavity (201), a second oxygen separation component (202) disposed in the second receiving cavity (201) and allowing oxygen to pass through, and a second pump (203) configured to draw air from the second receiving cavity (201) to the outside of the second receiving cavity (201) through the second oxygen separation component (202), the exhaust port of the second pump (203) being in communication with the atmosphere; and a connecting pipe (3) connecting the exhaust port of the first pump (103) and the second receiving cavity (21).

Description

Technical Field

[0001] This utility model relates to the field of household appliances, and more specifically, to a refrigerator. Background Technology

[0002] In the field of fruit and vegetable preservation, controlling the oxygen concentration in the storage environment is one of the key technologies for extending the shelf life of fruits and vegetables. A suitable oxygen concentration can not only inhibit the respiration of fruits and vegetables, reducing the consumption of nutrients, but also effectively slow down the aging process, thereby achieving the goal of long-term preservation. However, a common problem in the industry is that existing nitrogen-oxygen separation devices and oxygen concentration control methods are unable to precisely adjust the oxygen concentration to the ideal level (below 10%) required by fruits and vegetables.

[0003] Currently, most companies use flat-sheet nitrogen-oxygen separation membrane technology to control oxygen concentration. The basic principle of this technology is to utilize the selective permeation characteristics of the membrane material (oxygen separation component) to separate oxygen and nitrogen from the air, thereby reducing the oxygen concentration. Although flat-sheet nitrogen-oxygen separation membrane technology can reduce oxygen concentration to some extent, its effect is limited, typically only reducing the oxygen concentration to around 15%–18%. This concentration range is still too high for some oxygen-sensitive fruit and vegetable varieties, failing to meet their optimal storage conditions. Utility Model Content

[0004] The present invention aims to provide a refrigerator that facilitates the reduction of oxygen content to a lower level.

[0005] According to one aspect of the present invention, the present invention provides a refrigerator, which in some embodiments includes:

[0006] The first storage unit includes a first receiving cavity, a first oxygen separation component disposed in the first receiving cavity and allowing oxygen to pass through, and a first pump configured to draw air from the first receiving cavity to the outside of the first receiving cavity via the first oxygen separation component.

[0007] The second storage unit includes a second receiving cavity, a second oxygen separation component disposed in the second receiving cavity and allowing oxygen to pass through, and a second pump configured to draw air from the second receiving cavity to the outside of the second receiving cavity through the second oxygen separation component, the exhaust port of the second pump being in communication with the atmosphere.

[0008] Connect the pipeline to the exhaust port of the first pump and the second receiving cavity.

[0009] In some embodiments,

[0010] The first storage unit also includes a first concentration detection component for detecting the oxygen concentration within the first receiving cavity;

[0011] The second storage unit also includes a second concentration detection component for detecting the oxygen concentration within the second receiving cavity.

[0012] The refrigerator also includes:

[0013] The first air valve is installed in the connecting pipeline;

[0014] The controller is signal-connected to the first gas valve, the first concentration detection component, the second concentration detection component, and the first pump, and is configured to issue a command to start the first pump and a command to open the first gas valve in response to the first concentration detection component detecting a concentration greater than the first concentration and / or the second concentration detection component detecting a concentration less than the concentration of atmospheric oxygen and greater than or equal to the first concentration.

[0015] In some embodiments, a first ventilation section connecting the first receiving cavity and the second receiving cavity is further included. The controller is configured to control the opening and closing of the first ventilation section and is configured to issue a command to open the first ventilation section in response to a concentration detected by the first concentration detection component being less than a second concentration, wherein the second concentration is less than the first concentration.

[0016] In some embodiments,

[0017] The controller is signal-connected to the second pump and configured to issue a command to start the second pump in response to a concentration detected by the first concentration detection component being less than or equal to the first concentration and a concentration detected by the second concentration detection component being greater than the third concentration; and then, to issue a command to stop the second pump in response to a concentration detected by the second concentration detection component being less than or equal to the third concentration.

[0018] The third concentration is greater than the first concentration but less than or equal to the concentration of atmospheric oxygen.

[0019] In some embodiments, the second storage unit further includes a second ventilation unit communicating with the atmosphere of the second receiving cavity, the controller being configured to control the opening and closing of the second ventilation unit, and being configured to issue a command to open the second ventilation unit in response to a concentration detected by the second concentration detection component being less than a fourth concentration, wherein the fourth concentration is less than a third concentration.

[0020] In some embodiments,

[0021] The first storage section also includes a first exhaust pipe that connects the exhaust port of the first pump to the atmosphere and a second air valve disposed in the first exhaust pipe;

[0022] The controller is signal-connected to the second gas valve and configured to: in response to the first receiving cavity meeting a first preset condition and the second receiving cavity meeting a second preset condition, issue commands to start the first pump, start the second pump, close the first gas valve, and open the second gas valve; then, in response to the concentrations detected by the first and second concentration detection components being less than or equal to a third concentration, issue commands to open the first gas valve, close the second gas valve, and close the second pump; then, in response to the concentration detected by the first concentration detection component being less than or equal to the first concentration, issue commands to close the first pump and start the second pump, thereby modulating the oxygen concentration in the second receiving cavity to be less than or equal to the third concentration.

[0023] The first preset condition includes the first containment cavity being opened or the concentration detected by the first concentration detection component being greater than the fifth concentration, wherein the fifth concentration is greater than the third concentration and less than or equal to the concentration of atmospheric oxygen.

[0024] The second preset condition includes the second containment cavity being opened or the concentration detected by the second concentration detection component being greater than the sixth concentration, wherein the sixth concentration is greater than the third concentration and less than or equal to the concentration of atmospheric oxygen.

[0025] In some embodiments,

[0026] The first storage section also includes a first exhaust pipe that connects the exhaust port of the first pump to the atmosphere and a second air valve disposed in the first exhaust pipe;

[0027] The controller is connected to the second air valve signal and configured to:

[0028] In response to the first receiving cavity meeting a first preset condition and the second receiving cavity meeting a second preset condition, commands to start the first pump, start the second pump, close the first gas valve, and open the second gas valve are issued; then, in response to the concentration detected by the second concentration detection component being less than or equal to a third concentration and / or the concentration detected by the first concentration detection component being less than or equal to a third concentration, commands to open the first gas valve and close the second gas valve are issued; subsequently, in response to the concentration detected by the first concentration detection component being less than or equal to a first concentration, commands to close the first pump and start the second pump are issued; subsequently, in response to the concentration detected by the second concentration detection component being less than or equal to a third concentration, commands to close the second pump are issued; and / or

[0029] In response to the first receiving cavity meeting a first preset condition and the second receiving cavity not meeting a second preset condition, a command to start the first pump, a command to close the first gas valve, and a command to open the second gas valve are issued; then, in response to the concentration detected by the first concentration detection component being less than or equal to a third concentration, a command to open the first gas valve and a command to close the second gas valve are issued; subsequently, in response to the concentration detected by the first concentration detection component being less than or equal to the first concentration, a command to close the first pump and a command to start the second pump are issued; subsequently, in response to the concentration detected by the second concentration detection component being less than or equal to the third concentration, a command to close the second pump is issued; and / or

[0030] In response to the first receiving cavity not meeting the first preset condition and the second receiving cavity meeting the second preset condition, a command to turn on the second pump is issued; then, in response to the concentration detected by the second concentration detection component being less than or equal to the third concentration, a command to turn off the second pump is issued.

[0031] In some embodiments,

[0032] The first storage unit also includes a first fan disposed in the first receiving cavity and used to blow away the boundary layer formed by nitrogen on the surface of the first oxygen separation component;

[0033] The second storage section also includes a second fan disposed in the second housing cavity and used to blow away the boundary layer formed by nitrogen on the surface of the second oxygen separation component.

[0034] In some embodiments,

[0035] Multiple first oxygen separation components are arranged side by side along a first direction. The first storage section also includes a first air blowing pipe disposed between two adjacent first oxygen separation components. The first air blowing pipe is provided with exhaust holes on both sides facing the two adjacent first oxygen separation components. One end of the first air blowing pipe is configured to introduce the exhaust air of the first blower.

[0036] Multiple second oxygen separation components are arranged side by side along a second direction. The second storage section also includes a second air duct disposed between two adjacent second oxygen separation components. The second air duct is provided with exhaust holes on both sides facing the two adjacent second oxygen separation components. One end of the second air duct is configured to introduce the exhaust air of the second fan.

[0037] In some embodiments,

[0038] The first storage unit also includes a third blower located away from the first blow pipe of one of the multiple first oxygen separation components located at one end in the first direction, with the air outlet of the third blower facing the side of the first oxygen separation component away from the first blow pipe.

[0039] The second storage unit also includes a fourth fan located at one end of a second oxygen separation unit in a second direction, away from the second air duct, with the air outlet of the fourth fan facing the side of the second oxygen separation unit away from the first air duct.

[0040] In some embodiments,

[0041] The first concentration detection component includes a first pressure sensor for detecting the gas pressure within the first containment cavity. A controller is signal-connected to the first pressure sensor and configured to calculate the oxygen concentration within the first containment cavity according to the following formula:

[0042] C2 = (PO2' / P2) * 100%, where PO2' = PO2 - ΔP, ΔP = P1 - P2.

[0043] PO2 = P1 * C1,

[0044] in,

[0045] C1 represents the percentage concentration of oxygen in the atmosphere;

[0046] C2 represents the oxygen concentration in the first containment chamber after separation and deoxygenation.

[0047] P1 is atmospheric pressure;

[0048] The pressure within the first containment chamber after P2 separation and deoxygenation.

[0049] According to another aspect of the present invention, a control method for the above-described refrigerator is also provided, which, in some embodiments, includes:

[0050] The oxygen concentration in the first and second containment cavities are obtained respectively.

[0051] If the oxygen concentration in the first containment chamber is greater than the first concentration, and the oxygen concentration in the second containment chamber is less than the atmospheric oxygen concentration, then the gas drawn by the first pump will be delivered into the second containment chamber.

[0052] In some embodiments,

[0053] If the oxygen concentration in the first containment cavity is less than the second concentration, then the first ventilation section connecting the first containment cavity and the second containment cavity is opened, wherein the second concentration is less than the first concentration.

[0054] In some embodiments, it also includes:

[0055] After the oxygen concentration in the first containment cavity is less than or equal to the first concentration, the oxygen concentration in the second containment cavity is obtained;

[0056] If the oxygen concentration in the second containment chamber is greater than the third concentration, the second pump is activated to adjust the oxygen concentration in the second containment chamber to be less than or equal to the second concentration.

[0057] In some embodiments,

[0058] If the oxygen concentration in the second containment chamber is less than the fourth concentration, then the second ventilation section connecting the second containment chamber to the atmosphere is opened, wherein the fourth concentration is less than the third concentration.

[0059] According to another aspect of the present invention, a control method for the above-described refrigerator is also provided, which, in some embodiments, includes:

[0060] Determine whether the first receiving cavity meets the first preset condition and whether the second receiving cavity meets the second preset condition;

[0061] If the first receiving cavity meets the first preset condition and the second receiving cavity meets the second preset condition, then the first pump and the second pump are turned on respectively and the gas discharged by the first pump and the second pump are both discharged into the atmosphere.

[0062] If the oxygen concentration in the first and second containers is found to be less than or equal to a third concentration, then the gas discharged from the first pump is delivered into the second container to adjust the oxygen concentration in the first container to the first concentration, wherein the third concentration is greater than the first concentration and less than or equal to the atmospheric oxygen concentration.

[0063] in,

[0064] The first preset condition includes the first containment cavity being opened or the concentration detected by the first concentration detection component being greater than the fifth concentration, wherein the fifth concentration is greater than the third concentration and less than or equal to the concentration of atmospheric oxygen.

[0065] The second preset condition includes the second containment cavity being opened or the concentration detected by the second concentration detection component being greater than the sixth concentration, wherein the sixth concentration is greater than the third concentration and less than or equal to the concentration of atmospheric oxygen.

[0066] In some embodiments,

[0067] If the first receiving cavity meets the first preset condition and the second receiving cavity meets the second preset condition, the first pump and the second pump are turned on, and the gases discharged by the first pump and the second pump are respectively delivered to the atmosphere; the oxygen concentration in the first receiving cavity and the second receiving cavity are detected respectively. If the oxygen concentration in the first receiving cavity and the oxygen concentration in the second receiving cavity are respectively less than or equal to a third concentration, the gas discharged by the first pump is delivered to the second receiving cavity; then, the oxygen concentration in the first receiving cavity is detected. If the oxygen concentration in the first receiving cavity is less than or equal to the first concentration, the first pump is turned off and the second pump is turned on; then, the oxygen concentration in the second receiving cavity is detected. If the oxygen concentration in the second receiving cavity is less than or equal to the third concentration, the second pump is turned off; and / or

[0068] If the first receiving cavity meets the first preset condition and the second receiving cavity does not meet the second preset condition, then the first pump is turned on and the gas output by the first pump is delivered to the first receiving cavity and the second receiving cavity; then, the oxygen concentration in the first receiving cavity is detected. If the oxygen concentration in the first receiving cavity is less than or equal to a third concentration, then the gas output by the first pump is delivered to the second receiving cavity; then, the oxygen concentration in the first receiving cavity is detected again. If the oxygen concentration in the first receiving cavity is less than or equal to a first concentration, then the first pump is turned off and the second pump is turned on; then, the oxygen concentration in the second receiving cavity is detected again. If the oxygen concentration in the second receiving cavity is less than or equal to a third concentration, then the second pump is turned off; and / or

[0069] If the first containment chamber does not meet the first preset condition and the second containment chamber meets the second preset condition, then the second pump is turned on; then, the oxygen concentration in the second containment chamber is detected, and if the oxygen concentration in the second containment chamber is less than or equal to the third concentration, then the second pump is turned off.

[0070] By applying the technical solution of this application, since the oxygen concentration in the second containment cavity is lower than the oxygen concentration in the atmosphere, the oxygen concentration difference on both sides of the first oxygen separation component can be reduced compared to using only one separation component. Since the greater the oxygen concentration difference on both sides of the separation component, the more difficult it is to separate oxygen, a lower oxygen concentration can be obtained by using a gradient reduction method.

[0071] Furthermore, the refrigerator in this embodiment not only has a first containment cavity with a lower oxygen concentration, but also has different oxygen concentrations in the first containment cavity and the second containment cavity, which can be used to store items with different oxygen concentration requirements.

[0072] Other features and advantages of the present invention will become clear from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. Attached Figure Description

[0073] 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, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0074] Figure 1 A schematic diagram of the storage section of a refrigerator according to an embodiment of the present invention is shown;

[0075] Figure 2 A rear view of the storage section of a refrigerator according to an embodiment of the present invention is shown.

[0076] Figure 3 A schematic diagram of the structure of the storage compartment and the refrigeration component of a refrigerator according to an embodiment of the present invention is shown.

[0077] Figure 4 An exploded view of the storage section of a refrigerator according to an embodiment of the present invention is shown;

[0078] Figure 5 A block diagram of the control system of a refrigerator according to an embodiment of the present invention is shown; and

[0079] Figure 6 A flowchart illustrating the control process of a refrigerator according to an embodiment of the present invention is shown.

[0080] In the picture:

[0081] 1. First storage section; 101. First receiving cavity; 101a. First outer frame; 101b. Drawer A; 102. First oxygen separation component; 103. First pump; 104. First manifold; 105. First fan; 106. First air duct; 107. Third fan; 108. First exhaust pipe; 109. Second gas valve; 110. First cooling device; 111. First concentration detection component; 112. First status detection component; 2. Second storage section; 201. Second 201a, Second outer frame; 201b, Drawer B; 202, Second oxygen separation component; 203, Second pump; 204, Second manifold; 205, Second fan; 206, Second air duct; 207, Fourth fan; 208, Second exhaust pipe; 209, Second ventilation section; 210, Second cooling device; 211, Second concentration detection component; 212, Second status detection component; 3, Connecting pipeline; 4, First gas valve; 5, Controller; 6, First ventilation section. Detailed Implementation

[0082] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0083] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0084] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0085] In the description of this application, it should be noted that, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicating orientation or positional relationships, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. Furthermore, the terms "first," "second," and "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. "Vertical" is not vertical in the strict sense, but within the allowable tolerance range. "Parallel" is not parallel in the strict sense, but within the allowable tolerance range.

[0086] The directional terms used in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of this application. It should also be noted in the description of this application that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0087] Unless otherwise specified, the terms "comprising" and "including" as used in this application can be open-ended or closed-ended. For example, "comprising" and "including" can mean that other components not listed may also be included, or that only the listed components may be included.

[0088] Unless otherwise specified, the term "or" is inclusive in this application. For example, the phrase "A or B" means "A, B, or both A and B". More specifically, the condition "A or B" is satisfied by any of the following conditions: A is true (or exists) and B is false (or does not exist); A is false (or does not exist) and B is true (or exists); or both A and B are true (or exist).

[0089] Combination Figure 1 and Figure 2 As shown, a refrigerator according to this embodiment includes a first storage section 1, a second storage section 2, and a connecting pipe 3.

[0090] The first storage unit 1 includes a first receiving cavity 101, a first oxygen separation component 102 disposed in the first receiving cavity 101 and allowing oxygen to pass through, and a first pump 103 configured to draw air from the first receiving cavity 101 to the outside of the first receiving cavity 101 through the first oxygen separation component 102.

[0091] The second storage unit 2 includes a second receiving cavity 201, a second oxygen separation component 202 disposed in the second receiving cavity 201 and allowing oxygen to pass through, and a second pump 203 configured to draw air from the second receiving cavity 201 to the outside of the second receiving cavity 201 through the second oxygen separation component 202, the exhaust port of the second pump 203 being in communication with the atmosphere.

[0092] The connecting pipe 3 connects the exhaust port of the first pump 103 to the second receiving cavity 201.

[0093] In the technical solution of this application, the second pump 203 delivers the air in the second containment cavity 201 to the atmosphere through the second oxygen separation component 202. During the process of the air in the second containment cavity 201 passing through the second oxygen separation component 202, at least part of the oxygen passes through the second oxygen separation component 202 and is delivered to the atmosphere through the exhaust port of the second pump 203. Other gases, including nitrogen, remain in the second containment cavity 201. Therefore, the oxygen concentration in the second containment cavity 201 can be adjusted to be lower than the oxygen concentration of the atmosphere.

[0094] The first pump 203 delivers air from the first receiving cavity 101 to the second receiving cavity 201 via the first oxygen separation component 102. During the process of the air in the first receiving cavity 101 passing through the first oxygen separation component 102, at least some oxygen passes through the first oxygen separation component 102 and is then delivered to the second receiving cavity 201 through the exhaust port of the first pump 103. Other gases, including nitrogen, remain in the first receiving cavity 101.

[0095] Therefore, the oxygen concentration gradually decreases through the second oxygen separation component 202 and the first oxygen separation component 102. The oxygen concentration difference across the second oxygen separation component 202 is the difference between the atmospheric oxygen concentration and the oxygen concentration in the second receiving cavity 201. The oxygen concentration difference across the first oxygen separation component 102 is the difference between the oxygen concentration in the second receiving cavity 201 and the oxygen concentration in the first receiving cavity 101.

[0096] Since the oxygen concentration in the second containment cavity 201 is lower than the atmospheric oxygen concentration, the oxygen concentration difference on both sides of the first oxygen separation component 102 can be reduced compared to using only one separation component. Since the greater the oxygen concentration difference on both sides of the separation component, the more difficult it is to separate oxygen, a lower oxygen concentration can be obtained by using a gradient reduction method.

[0097] Furthermore, the refrigerator in this embodiment not only has a first containing cavity 101 with a lower oxygen concentration, but also the first containing cavity 101 and the second containing cavity 201 have different oxygen concentrations, and the two can be used to store items with different oxygen concentration requirements.

[0098] For example:

[0099] The first chamber 101 is used to store fruits and vegetables suitable for storage in a low-oxygen environment (oxygen concentration of 6% to 8%), such as strawberries, blueberries, and cherries. Fruits and vegetables with an oxygen concentration below 6% are prone to undergoing anoxic chemical reactions, producing harmful chemical products. An oxygen concentration between 6% and 8% can effectively inhibit the respiration of fruits and vegetables, thus improving the preservation effect.

[0100] The second containment chamber 201 is used to store fruits and vegetables that do not require excessively low oxygen levels (10% to 12%), such as leafy green vegetables, cucumbers, and green peppers.

[0101] The first oxygen separation component 102 includes a hollow fiber membrane bundle, which comprises multiple extremely fine hollow fiber membranes. The first storage unit 1 also includes a first manifold 104 connected to the hollow fiber membrane bundle, and the first manifold 104 is connected to the suction port of the first pump 103. The first pump 103 includes a vacuum pump, which creates a vacuum in the first manifold 104 and the interior of the hollow fiber membrane. Under the action of the internal and external pressure difference, oxygen outside the hollow fiber membrane (within the first receiving cavity 101) is forced to pass through the membrane material into the interior of the hollow fiber membrane, and is discharged to the outside of the drawer through the first manifold 104 and the vacuum pump, thereby achieving the function of deoxygenation.

[0102] The second oxygen separation component 202 includes a hollow fiber membrane bundle, which comprises multiple extremely fine hollow fiber membranes. The second storage unit 2 also includes a second manifold 204 connected to the hollow fiber membrane bundle, and the second manifold 204 is connected to the suction port of the second pump 203. The second pump 203 includes a vacuum pump, which creates a vacuum in the second manifold 204 and the interior of the hollow fiber membrane. Under the pressure difference between the inside and outside of the hollow fiber membrane, oxygen outside the hollow fiber membrane (within the second receiving cavity 201) is forced through the membrane material into the interior of the hollow fiber membrane, and then discharged to the outside of the drawer through the second manifold 204 and the vacuum pump, thus achieving the effect of oxygen reduction.

[0103] See Figure 1 , 2 As shown in Figure 5, the first storage unit 1 further includes a first concentration detection component 111 for detecting the oxygen concentration in the first receiving cavity 101; the second storage unit 2 further includes a second concentration detection component 211 for detecting the oxygen concentration in the second receiving cavity 201.

[0104] The refrigerator also includes a first gas valve 4 and a controller 5. The first gas valve 4 is installed in the connecting pipe 3 to control the opening and closing of the connecting pipe 3.

[0105] The controller 5 is signal-connected to the first gas valve 4, the first concentration detection unit 111, the second concentration detection unit 211, and the first pump 103, respectively, and is configured to issue a command to start the first pump 103 and open the first gas valve 4 in response to the first concentration detection unit 111 detecting a concentration greater than a first concentration and / or the second concentration detection unit 211 detecting a concentration less than the atmospheric oxygen concentration but greater than or equal to the first concentration. In some embodiments, the first concentration is 8%.

[0106] When the oxygen concentration in the second containment cavity 201 is lower than the atmospheric oxygen concentration, the first gas valve 4 is opened to deliver the gas discharged by the first pump 103 to the second containment cavity 201. This makes the oxygen concentration difference on both sides of the first oxygen separation component 102 equal to the difference between the oxygen concentration in the second containment cavity 201 and the oxygen concentration in the first containment cavity 101. Compared to the difference between the oxygen concentration on both sides of the first oxygen separation component 102 being equal to the difference between the atmospheric oxygen concentration and the oxygen concentration in the first containment cavity 101, this effectively reduces the oxygen concentration difference on both sides of the first oxygen separation component 102, which is beneficial for obtaining a lower oxygen concentration in the first containment cavity 101.

[0107] In some embodiments, the refrigerator further includes a first ventilation section 6 communicating with the first receiving cavity 101 and the second receiving cavity 201. The controller 5 is configured to control the opening and closing of the first ventilation section 6 and is configured to issue a command to open the first ventilation section 6 in response to a concentration detected by the first concentration detection component 111 being less than a second concentration, wherein the second concentration is less than the first concentration.

[0108] When the oxygen concentration in the first container 101 is lower than the second concentration, the oxygen concentration in the first container 101 can be increased to the required range by opening the first ventilation section 6. This is beneficial for the fruits and vegetables in the first container 101 to undergo non-oxidative chemical reactions due to excessively low oxygen concentration, thereby preventing the fruits and vegetables from rotting and spoiling.

[0109] The controller 5 is signal-connected to the second pump 203 and configured to issue a command to turn on the second pump 203 in response to a concentration detected by the first concentration detection unit 111 being less than or equal to a first concentration and a concentration detected by the second concentration detection unit 211 being greater than a third concentration; and then, in response to a concentration detected by the second concentration detection unit 211 being less than or equal to a third concentration, issue a command to turn off the second pump 203, wherein the third concentration is greater than the first concentration and less than or equal to the concentration of atmospheric oxygen. In some embodiments, the third concentration is 12%.

[0110] In this embodiment, the second pump 203 and the second oxygen separation component 202 cooperate under the control of the controller 5 to maintain the oxygen concentration in the second receiving cavity 201 below the third concentration, so as to reduce the respiration of the fruits and vegetables placed in the second receiving cavity 201 and keep them fresh.

[0111] The second storage unit 2 also includes a second ventilation unit 209 communicating with the atmosphere of the second receiving cavity 201. The controller 5 is configured to control the opening and closing of the second ventilation unit 209 and is configured to issue a command to open the second ventilation unit 209 in response to a concentration detected by the second concentration detection component 211 being less than a fourth concentration, wherein the fourth concentration is less than a third concentration. In some embodiments, the fourth concentration is 10%.

[0112] When the oxygen concentration in the second containment cavity 201 is lower than the fourth concentration, the oxygen concentration in the second containment cavity 201 can be increased to the required range by opening the second ventilation section 209. This is beneficial for the fruits and vegetables in the second containment cavity 201 to undergo non-oxidative chemical reactions due to excessively low oxygen concentration, thereby preventing the fruits and vegetables from rotting and spoiling.

[0113] During refrigerator storage, monitor the oxygen content (oxygen concentration) in the first and second compartments 101 and 201.

[0114] (1) First adjust the oxygen concentration of the first receiving cavity 101: If the oxygen concentration of the first receiving cavity 101 is < the second concentration (e.g., 6%), then open the first ventilation section 6 and introduce air with an oxygen concentration of about the third concentration (e.g., 12%) from the second receiving cavity 201 into the first receiving cavity 101, slowly increase the oxygen concentration of the first receiving cavity 101 until the oxygen concentration of the first receiving cavity 101 is ≥ the second concentration (e.g., 6%), then close the first ventilation section 6.

[0115] If the first containment chamber 101 is greater than the first concentration (e.g., 8%), the oxygen reduction device (first pump 103 and first oxygen separation component 102) in the first containment chamber 101 is turned on to pump oxygen into the space of the second containment chamber 201. The oxygen in the first containment chamber 101 continues to be reduced until it is ≤ the first concentration (e.g., 8%) and then stops.

[0116] (2) Then adjust the oxygen content in the second accommodating chamber 201:

[0117] If the oxygen concentration in the second containment chamber 201 is greater than the third concentration (e.g., 12%), the second containment chamber 201 will open to reduce the oxygen concentration to ≤ the third concentration (e.g., 12%) and then stop.

[0118] If the second containment cavity 201 is less than the fourth concentration (e.g., 10%), the second ventilation section 209 is opened to introduce air into the second containment cavity 201, and the ventilation stops when the second containment cavity 201 is greater than or equal to the fourth concentration (e.g., 10%).

[0119] In some embodiments, the first storage unit 1 further includes a first exhaust pipe 108 that connects the exhaust port of the first pump 103 to the atmosphere and a second air valve 109 disposed in the first exhaust pipe 108.

[0120] The controller 5 is signal-connected to the second gas valve 109 and configured to: in response to the first receiving cavity 101 meeting a first preset condition and the second receiving cavity 501 meeting a second preset condition, issue commands to open the first pump 103, open the second pump 203, close the first gas valve 4, and open the second gas valve 109; then, in response to the concentrations detected by the first concentration detection component 111 and the second concentration detection component 111 being less than or equal to a third concentration, issue commands to open the first gas valve 4, close the second gas valve 109, and close the second pump 203; then, in response to the concentration detected by the first concentration detection component 111 being less than or equal to the first concentration, issue commands to close the first pump 103 and open the second pump 203, so as to modulate the oxygen concentration in the second receiving cavity 201 to be less than or equal to the third concentration.

[0121] The first preset condition includes the first receiving cavity 101 being opened or the concentration detected by the first concentration detection component 111 being greater than the fifth concentration, wherein the fifth concentration is greater than the third concentration and less than or equal to the concentration of atmospheric oxygen. The first fifth concentration is equal to or slightly lower than the concentration of atmospheric oxygen.

[0122] The second preset condition includes the second receiving cavity 201 being opened or the concentration detected by the second concentration detection component 211 being greater than a sixth concentration, wherein the sixth concentration is greater than a third concentration and less than or equal to the concentration of atmospheric oxygen. The first fifth concentration is equal to or slightly lower than the concentration of atmospheric oxygen. In some embodiments, the fifth concentration is equal to the sixth concentration.

[0123] When both the first containment cavity 101 and the second containment cavity 201 have been opened, or when their concentrations have reached the fifth and sixth concentrations respectively, that is, when the concentrations in both the first containment cavity 101 and the second containment cavity 201 have reached a relatively high value, the first pump 103 and the second pump 203 are used to reduce the oxygen concentration in the first containment cavity 101 and the second containment cavity 201 respectively, which is beneficial to increasing the rate at which the oxygen concentration in the first containment cavity 101 and the second containment cavity 201 decreases.

[0124] Then, when the oxygen concentration in the second containment chamber 201 is less than or equal to the third concentration (e.g., 12%) and the oxygen concentration in the first containment chamber 101 is less than or equal to the third concentration, the first gas valve 4 is opened and the second gas valve 109 is closed, thereby delivering the gas output from the exhaust port of the first pump 103 to the second containment chamber 201. When the oxygen concentration in the second containment chamber 201 is lower than the oxygen concentration in the atmosphere, the first gas valve 4 is opened to deliver the gas discharged from the first pump 103 to the second containment chamber 201, thereby making the oxygen concentration difference on both sides of the first oxygen separation component 102 equal to the difference between the oxygen concentration in the second containment chamber 201 and the oxygen concentration in the first containment chamber 101. Compared to the oxygen concentration difference on both sides of the first oxygen separation component 102 being equal to the difference between the oxygen concentration in the atmosphere and the oxygen concentration in the first containment chamber 101, this effectively reduces the oxygen concentration difference on both sides of the first oxygen separation component 102, which is beneficial for obtaining a lower oxygen concentration in the first containment chamber 101.

[0125] In some embodiments, the refrigerator further includes a camera for detecting whether the first receiving cavity 101 and the second receiving cavity 201 are opened (activated). The controller 5 is connected to the camera signal and determines whether the first receiving cavity 101 and the second receiving cavity 201 are opened based on the image captured by the camera, so as to reduce the oxygen concentration therein in a timely manner when the opening of the first receiving cavity 101 and / or the second receiving cavity 201 is opened.

[0126] See Figure 3 and Figure 4 In this embodiment, the first receiving cavity 101 includes a first outer frame 101a and an A drawer 101b that is retractably disposed within the first outer frame 101a. The first storage section 1 also includes a first refrigerant pipe 110 disposed within the first outer frame 101a. The A drawer receives cooling through the first refrigerant pipe 110 at its top. The first refrigerant pipe 110 and the first outer frame 101a at the top of the A drawer are made of metal.

[0127] The second receiving cavity 201 in this embodiment includes a second outer frame 201a and a drawer B 101b that is retractably disposed within the second outer frame 201a. The second storage section 2 also includes a second refrigerant pipe 210 disposed within the second outer frame 201a. The drawer B receives cooling through the second refrigerant pipe 210 at its top. The second refrigerant pipe 210 and the second outer frame 201a at the top of the drawer B are made of metal.

[0128] In some embodiments, the first storage unit 1 further includes a first exhaust pipe 108 that connects the exhaust port of the first pump 103 to the atmosphere and a second air valve 109 disposed in the first exhaust pipe 108.

[0129] See Figure 6The controller 5 is signal-connected to the second air valve 109 and is configured to:

[0130] In response to the first receiving cavity 101 meeting a first preset condition and the second receiving cavity 201 meeting a second preset condition (e.g., both the first receiving cavity 101 and the second receiving cavity 201 are open), an instruction to open the first pump 103, an instruction to open the second pump 203, an instruction to close the first gas valve 4, and an instruction to open the second gas valve 109 are issued. Then, in response to the concentration detected by the second concentration detection component 211 being less than or equal to a third concentration and / or the concentration detected by the first concentration detection component 111 being less than or equal to a third concentration, an instruction to open the first gas valve 4 and an instruction to close the second gas valve 109 are issued. Subsequently, in response to the concentration detected by the first concentration detection component 111 being less than or equal to a first concentration, an instruction to close the first pump 103 and an instruction to open the second pump 203 are issued. Subsequently, in response to the concentration detected by the second concentration detection component 211 being less than or equal to a third concentration, an instruction to close the second pump 203 is issued.

[0131] That is:

[0132] First, both the first receiving cavity 101 and the second receiving cavity 201 are opened: the first receiving cavity 101 and the second receiving cavity 201 simultaneously deoxygenate, the first pump 103 and the second pump 203 are turned on, the first pump 103 and the second pump 203 are respectively connected to the first oxygen separation component 102 and the second oxygen separation component 202, and respectively extract the oxygen inside the first receiving cavity 101 and the second receiving cavity 201 into the refrigerator air (the space between the refrigerator shell and the first receiving cavity 101 or the second receiving cavity 201, which is open to the atmosphere). The exhaust from the first pump 103 is discharged through the first exhaust pipe 108;

[0133] Then, when the oxygen concentration in the second containment chamber 201 is reduced to ≤ a third concentration (e.g., 12%), the oxygen reduction in the second containment chamber 201 is stopped.

[0134] Then, when the oxygen concentration in the first containment chamber 101 is reduced to ≤ the third concentration (e.g., 12%), the second gas valve 109 in the first exhaust pipe 108 is closed and the first gas valve 4 is opened. The oxygen extracted from the first containment chamber 101 is then introduced into the second containment chamber 201. The oxygen concentration in the first containment chamber 101 continues to be reduced to ≤ the first concentration (e.g., 8%) and then stops. This process achieves gradient oxygen reduction. The oxygen reduction rate and effect of the nitrogen-oxygen separation hollow fiber membrane are related to the oxygen concentration difference inside and outside the membrane. The larger the concentration difference, the more difficult it is to extract oxygen. If oxygen is extracted from the first containment chamber 101 to the atmosphere, the oxygen concentration difference between the third concentration (e.g., 12%) in the first containment chamber 101 and the oxygen concentration in the atmosphere (21%) is about 9%. The oxygen concentration difference between the third concentration (e.g., 12%) in the first containment chamber 101 and the third concentration (e.g., 12%) in the second containment chamber 201 is very small. Therefore, by using gradient oxygen reduction, the oxygen concentration in the first containment chamber 101 can be reduced to a lower level.

[0135] In response to the first receiving cavity 101 meeting a first preset condition and the second receiving cavity 201 not meeting a second preset condition (e.g., the first receiving cavity 101 has been opened, while the second receiving cavity 201 has not been opened), a command to turn on the first pump 103, a command to close the first gas valve 4, and a command to open the second gas valve 109 are issued; then, in response to the concentration detected by the first concentration detection component 111 being less than or equal to a third concentration, a command to open the first gas valve 4 and a command to close the second gas valve 109 are issued; then, in response to the concentration detected by the first concentration detection component 111 being less than or equal to the first concentration, a command to close the first pump 103 and a command to turn on the second pump 203 are issued; then, in response to the concentration detected by the second concentration detection component 211 being less than or equal to the third concentration, a command to close the second pump 203 is issued.

[0136] That is:

[0137] first,

[0138] The first receiving cavity 101 activates the oxygen reduction device (first pump and first oxygen separation component), and exhausts the gas into the refrigerator's interior space (the refrigerator's interior space is connected to the atmosphere);

[0139] When the oxygen concentration in the first containment chamber 101 is reduced to ≤ the third concentration (e.g., 12%), the exhaust gas is transferred from the inside of the refrigerator to the space of the second containment chamber 201. The oxygen concentration in the first containment chamber 101 continues to be reduced to the first concentration (e.g., 8%) and then stops.

[0140] The second containment chamber 201 is opened to reduce oxygen to ≤ the third concentration (e.g., 12%) and then stopped.

[0141] In response to the first receiving cavity 101 not meeting the first preset condition and the second receiving cavity 201 meeting the second preset condition (i.e., the first receiving cavity 101 has not been opened and the second receiving cavity 201 has been opened), a command to open the second pump 203 is issued; then, in response to the concentration detected by the second concentration detection component 211 being less than or equal to the third concentration, a command to close the second pump 203 is issued.

[0142] That is: the first containment chamber 101 is closed + the second containment chamber 201 is opened: the second containment chamber 201 stops reducing oxygen to a third concentration (e.g., 12%).

[0143] In some embodiments, the first storage unit 1 further includes a first fan 105 disposed in the first receiving cavity 101 and used to blow away the boundary layer formed by nitrogen on the surface of the first oxygen separation component 102.

[0144] The second storage unit 2 also includes a second fan 205 disposed in the second receiving cavity 201 and used to blow away the boundary layer formed by nitrogen on the surface of the second oxygen separation component 202.

[0145] As oxygen enters the hollow fiber membrane, the high concentration of nitrogen remaining on the membrane surface forms a boundary layer, preventing outside air from contacting the membrane surface and thus reducing the oxygen removal rate. In this case, a fan is needed to disrupt the airflow and disperse the boundary layer, allowing the hollow fiber membrane to come into contact with fresh air, which helps improve the oxygen separation efficiency.

[0146] Multiple first oxygen separation components 102 are arranged side by side along a first direction. The first storage unit 1 also includes a first air blowing pipe 106 disposed between two adjacent first oxygen separation components 102. The first air blowing pipe 106 is provided with exhaust holes on both sides of the two adjacent first oxygen separation components 102 respectively. One end of the first air blowing pipe 106 is configured to introduce the air outlet of the first fan 105.

[0147] Multiple second oxygen separation components 202 are arranged side by side along the second direction. The second storage unit 2 also includes a second air duct 206 disposed between two adjacent second oxygen separation components 202. The second air duct 206 is provided with exhaust holes on both sides of the two adjacent second oxygen separation components 202. One end of the second air duct 206 is configured to introduce the air outlet of the second fan 205.

[0148] The first fan 105 can supply air to the first air duct 106. Air ducts 106 are provided on both sides of the first oxygen separation component 102, so the boundary layer on both sides of the first oxygen separation component 102 can be dispersed. Therefore, the boundary layer on both sides of multiple first oxygen separation components 102 can be dispersed to improve the separation efficiency of the oxygen separation components. The working principle of the second fan 205 and the second air duct 206 is the same as that of the first fan and the first air duct 106, and will not be described again here.

[0149] The first storage unit 1 also includes a third fan 107 located at one end of a plurality of first oxygen separation components 102 in a first direction, away from the first air blowing pipe 106, with the air outlet of the third fan 107 facing the side of the first oxygen separation component 102 away from the first air blowing pipe 106.

[0150] The second storage unit 2 also includes a fourth fan 207 located at one end of a plurality of second oxygen separation components 202 in a second direction, away from the second air duct 206. The air outlet of the fourth fan 207 faces the side of the second oxygen separation component 202 away from the first air duct 106.

[0151] The first oxygen separation component 102 located at one end in the first direction has a first air blowing pipe 106 only on its inner side. The third fan 107 is used to blow away the boundary layer on the outer side of the first oxygen separation component 102 at the end, so as to improve the separation efficiency of the first oxygen separation component 102. The function and working principle of the fourth fan 107 are similar to those of the third fan 107, and will not be described again here.

[0152] The first blower 105 is connected to multiple first air ducts 106. The surface of each first air duct 106 has many pores for air outlet. The first air ducts 106 and hollow fiber membrane bundles are placed alternately, and the first air ducts 106 better disperse the boundary layer between the hollow fiber membrane bundles. At the same time, a third blower 107 is placed on the side of the hollow fiber membrane bundle. The third blower 107 can disperse the boundary layer on the outside of the hollow fiber membrane bundle. The intersecting air ducts can form airflow throughout the space, making the oxygen reduction effect better.

[0153] In the field of fruit and vegetable preservation, controlling the oxygen concentration in the storage environment is one of the key technologies for extending the shelf life of fruits and vegetables. Current technologies typically use oxygen sensors to monitor oxygen concentration. However, because these sensors require periodic calibration with air, they cannot be calibrated by contact with air when placed in a completely sealed deoxygenation drawer, leading to measurement errors. Therefore, existing oxygen sensors cannot accurately monitor oxygen concentration for extended periods in a sealed environment.

[0154] In some embodiments, the first concentration detection component 111 includes a first pressure sensor for detecting the gas pressure inside the first receiving cavity 101. The controller 5 is signal-connected to the first pressure sensor and configured to calculate the oxygen concentration inside the first receiving cavity 101 according to the following formula:

[0155] C2 = (PO2' / P2) * 100%, where PO2' = PO2 - ΔP, ΔP = P1 - P2.

[0156] PO2 = P1 * C1,

[0157] in,

[0158] C1 represents the percentage concentration of oxygen in the atmosphere;

[0159] C2 represents the oxygen concentration in the first containment chamber after separation and deoxygenation.

[0160] P1 is atmospheric pressure;

[0161] The pressure within the first containment chamber after P2 separation and deoxygenation.

[0162] In the above embodiments, the oxygen concentration inside the fruit and vegetable preservation and oxygen reduction drawer is monitored based on pressure changes. By monitoring the pressure changes inside the oxygen reduction drawer and combining relevant calculations, accurate monitoring of the oxygen concentration is achieved.

[0163] Oxygen-reducing drawer structure: includes a completely sealed drawer space with a pressure sensor inside.

[0164] Pressure sensor: Installed inside the oxygen-reducing drawer to monitor pressure changes inside the drawer in real time.

[0165] Data processing unit: Connects to the pressure sensor, receives and processes pressure data, and calculates oxygen concentration.

[0166] Calculation method: By monitoring the pressure change inside the oxygen decompression drawer and combining it with the known gas molar quantity and temperature, the oxygen concentration is calculated using the ideal gas equation (PV=nRT).

[0167] 1. Ideal gas law: PV = nRT

[0168] When temperature (T) and volume (V) are constant, pressure (P) is directly proportional to the amount of gaseous substance (n). Removing oxygen reduces the total amount of substance, thus lowering the pressure.

[0169] Dalton's law of partial pressures states that the total pressure in a confined space is the sum of the partial pressures of its constituent gases. Changes in the partial pressure of oxygen directly reflect changes in its concentration.

[0170] 2. Initial state measurement

[0171] Record the initial total pressure of the enclosed space as P1 = 1 atm and the initial oxygen concentration as C1 = 21%. Then the initial oxygen partial pressure is PO2 = P1 * C1 = 0.21 atm.

[0172] 3. Calculate the change in oxygen concentration after extraction.

[0173] After the oxygen is extracted, the total air pressure in the space becomes P2 = 0.9 atm, then ΔP = P1 - P2 = 0.1 atm.

[0174] The partial pressure of oxygen in the space after the oxygen is extracted is PO2' = PO2 - ΔP = 0.21 atm - 0.1 atm = 0.11 atm.

[0175] The oxygen concentration after extraction is calculated as C2 = (0.11 / 0.9) * 100% = 12.2%.

[0176] According to another aspect of the present invention, a control method for the above-mentioned refrigerator is also provided, the control method comprising:

[0177] The oxygen concentration in the first receiving cavity 101 and the oxygen concentration in the second receiving cavity 201 are obtained respectively.

[0178] If the oxygen concentration in the first containment cavity 101 is greater than the first concentration, and the oxygen concentration in the second containment cavity 201 is less than the atmospheric oxygen concentration, then the gas drawn by the first pump 103 will be transported into the second containment cavity 201.

[0179] Since the oxygen concentration in the second containment cavity 201 is lower than the atmospheric oxygen concentration, the oxygen concentration difference on both sides of the first oxygen separation component 102 can be reduced compared to using only one separation component. Since the greater the oxygen concentration difference on both sides of the separation component, the more difficult it is to separate oxygen, a lower oxygen concentration can be obtained by using a gradient reduction method.

[0180] In some embodiments,

[0181] If the oxygen concentration in the first containment cavity 101 is less than the second concentration, then the first ventilation section 6 connecting the first containment cavity 101 and the second containment cavity 201 is opened, wherein the second concentration is less than the first concentration.

[0182] In some embodiments, the control method further includes:

[0183] After the oxygen concentration in the first receiving cavity 101 is less than or equal to the first concentration, the oxygen concentration in the second receiving cavity 201 is obtained.

[0184] If the oxygen concentration in the second containment chamber 201 is greater than the third concentration, the second pump 203 is activated to adjust the oxygen concentration in the second containment chamber 201 to be less than or equal to the second concentration.

[0185] In some embodiments,

[0186] If the oxygen concentration in the second containment cavity 201 is less than the fourth concentration, then the second ventilation section 209 connecting the second containment cavity 201 and the atmosphere is opened, wherein the fourth concentration is less than the third concentration.

[0187] The control method, in some embodiments, includes:

[0188] Determine whether the first receiving cavity 101 meets the first preset condition and whether the second receiving cavity 501 meets the second preset condition;

[0189] If the first receiving cavity 101 meets the first preset condition and the second receiving cavity 501 meets the second preset condition, then the first pump 103 and the second pump 203 are opened respectively and the gas discharged by the first pump 103 and the second pump 203 is discharged to the atmosphere.

[0190] If the oxygen concentration in the first containment cavity 101 and the oxygen concentration in the second containment cavity 201 are both less than or equal to a third concentration, then the gas discharged from the first pump 103 is delivered into the second containment cavity 201 to adjust the oxygen concentration in the first containment cavity 101 to the first concentration, wherein the third concentration is greater than the first concentration and less than or equal to the concentration of atmospheric oxygen.

[0191] in,

[0192] The first preset condition includes the first receiving cavity 101 being opened or the concentration detected by the first concentration detection component 111 being greater than the fifth concentration, wherein the fifth concentration is greater than the third concentration and less than or equal to the concentration of atmospheric oxygen.

[0193] The second preset condition includes the second containment cavity 201 being opened or the concentration detected by the second concentration detection component 211 being greater than the sixth concentration, wherein the sixth concentration is greater than the third concentration and less than or equal to the concentration of atmospheric oxygen.

[0194] See Figure 6If the first receiving cavity 101 meets the first preset condition and the second receiving cavity 201 meets the second preset condition, the first pump 103 and the second pump 203 are turned on and the gases discharged by the first pump 103 and the second pump 203 are respectively delivered to the atmosphere; the oxygen concentration in the first receiving cavity 101 and the second receiving cavity 201 are detected respectively. If the oxygen concentration in the first receiving cavity 101 and the oxygen concentration in the second receiving cavity 201 are respectively less than or equal to a third concentration, the gas discharged by the first pump 103 is delivered into the second receiving cavity 201; then, the oxygen concentration in the first receiving cavity 101 is detected. If the oxygen concentration in the first receiving cavity 101 is less than or equal to the first concentration, the first pump 103 is turned off and the second pump 203 is turned on; then, the oxygen concentration in the second receiving cavity 201 is detected. If the oxygen concentration in the second receiving cavity 201 is less than or equal to the third concentration, the second pump 203 is turned off.

[0195] If the first receiving cavity 101 meets the first preset condition and the second receiving cavity 201 does not meet the second preset condition, then the first pump 103 is turned on and the gas output by the first pump 103 is delivered to the first receiving cavity 101 and the second receiving cavity 201. Then, the oxygen concentration in the first receiving cavity 101 is detected. If the oxygen concentration in the first receiving cavity 101 is less than or equal to the third concentration, then the gas output by the first pump 103 is delivered to the second receiving cavity 201. Next, the oxygen concentration in the first receiving cavity 101 is detected. If the oxygen concentration in the first receiving cavity 101 is less than or equal to the first concentration, then the first pump 103 is turned off and the second pump 203 is turned on. Next, the oxygen concentration in the second receiving cavity 201 is detected. If the oxygen concentration in the second receiving cavity 201 is less than or equal to the third concentration, then the second pump 203 is turned off.

[0196] If the first receiving cavity 101 does not meet the first preset condition and the second receiving cavity 201 meets the second preset condition, then the second pump 203 is turned on; then, the oxygen concentration in the second receiving cavity 201 is detected, and if the oxygen concentration in the second receiving cavity 201 is less than or equal to the third concentration, then the second pump 203 is turned off.

[0197] This invention achieves optimal oxygen conditions for different fruits and vegetables by setting up two oxygen concentration spaces. At the same time, oxygen is extracted from the low-oxygen space to the second-low-oxygen space through a hollow fiber nitrogen-oxygen separation membrane. The small oxygen concentration difference between the low-oxygen space and the second-low-oxygen space improves the oxygen separation efficiency and rate, allowing the low-oxygen space to be reduced to an even lower oxygen concentration.

[0198] The above are merely exemplary embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A refrigerator characterized by comprising: include: The first storage unit (1) includes a first receiving cavity (101), a first oxygen separation component (102) disposed in the first receiving cavity (101) and allowing oxygen to pass through, and a first pump (103) configured to draw air from the first receiving cavity (101) to the outside of the first receiving cavity (101) via the first oxygen separation component (102). The second storage unit (2) includes a second receiving cavity (201), a second oxygen separation component (202) disposed in the second receiving cavity (201) and allowing oxygen to pass through, and a second pump (203) configured to draw air from the second receiving cavity (201) to the outside of the second receiving cavity (201) through the second oxygen separation component (202), wherein the exhaust port of the second pump (203) is in communication with the atmosphere; Connecting pipe (3) connects the exhaust port of the first pump (103) to the second receiving cavity (201).

2. The refrigerator according to claim 1, characterized in that, The first storage unit (1) further includes a first concentration detection component (111) for detecting the oxygen concentration in the first receiving cavity (101); The second storage unit (2) further includes a second concentration detection component (211) for detecting the oxygen concentration within the second receiving cavity (201). The refrigerator also includes: The first air valve (4) is installed in the connecting pipe (3); The controller (5) is signal-connected to the first gas valve (4), the first concentration detection component (111), the second concentration detection component (211), and the first pump (103), respectively, and is configured to issue a command to turn on the first pump (103) and a command to open the first gas valve (4) in response to the concentration detected by the first concentration detection component (111) being greater than a first concentration and / or the concentration detected by the second concentration detection component (211) being less than the concentration of oxygen in the atmosphere and greater than or equal to the first concentration, wherein the first concentration is less than the concentration of oxygen in the atmosphere.

3. The refrigerator according to claim 2, characterized in that, It also includes a first ventilation section (6) connecting the first receiving cavity (101) and the second receiving cavity (201), the controller (5) being configured to control the opening and closing of the first ventilation section (6) and being configured to issue a command to open the first ventilation section (6) in response to the concentration detected by the first concentration detection component (111) being less than a second concentration, wherein the second concentration is less than the first concentration.

4. The refrigerator according to claim 2, characterized in that, The controller (5) is signal-connected to the second pump (203) and configured to issue a command to turn on the second pump (203) in response to a concentration detected by the first concentration detection component (111) being less than or equal to the first concentration and a concentration detected by the second concentration detection component (211) being greater than a third concentration; and then, in response to a concentration detected by the second concentration detection component (211) being less than or equal to the third concentration, issue a command to turn off the second pump (203). The third concentration is greater than the first concentration and less than or equal to the concentration of atmospheric oxygen.

5. The refrigerator according to claim 4, characterized in that, The second storage unit (2) further includes a second ventilation unit (209) communicating with the atmosphere of the second containment cavity (201). The controller (5) is configured to control the opening and closing of the second ventilation unit (209) and is configured to issue a command to open the second ventilation unit (209) in response to the concentration detected by the second concentration detection unit (211) being less than a fourth concentration, wherein the fourth concentration is less than the third concentration.

6. The refrigerator according to claim 4, characterized in that, The first storage unit (1) further includes a first exhaust pipe (108) that connects the exhaust port of the first pump (103) to the atmosphere and a second air valve (109) disposed in the first exhaust pipe (108); The controller (5) is signal-connected to the second air valve (109) and configured to: in response to the first receiving cavity (101) meeting a first preset condition and the second receiving cavity (201) meeting a second preset condition, issue commands to open the first pump (103), open the second pump (203), close the first air valve (4), and open the second air valve (109); then, in response to the concentrations detected by the first concentration detection component (111) and the second concentration detection component (211) being less than or equal to the specified concentrations, the controller (5) issues commands to: open the first pump (103), open the second pump (203), close the first air valve (4), and open the second air valve (109). If the concentration is equal to the third concentration, an instruction is issued to open the first gas valve (4), close the second gas valve (109), and close the second pump (203); then, in response to the concentration detected by the first concentration detection unit (111) being less than or equal to the first concentration, an instruction is issued to close the first pump (103) and open the second pump (203); subsequently, in response to the concentration detected by the second concentration detection unit (211) being less than or equal to the third concentration, an instruction is issued to close the second pump (203); and / or In response to the first receiving cavity (101) meeting the first preset condition and the second receiving cavity (201) not meeting the second preset condition, an instruction to start the first pump (103), an instruction to close the first air valve (4), and an instruction to open the second air valve (109) are issued. Then, in response to the concentration detected by the first concentration detection unit (111) being less than or equal to the third concentration, an instruction to open the first gas valve (4) and an instruction to close the second gas valve (109) are issued; then, in response to the concentration detected by the first concentration detection unit (111) being less than or equal to the first concentration, an instruction to close the first pump (103) and an instruction to open the second pump (203) are issued; then, in response to the concentration detected by the second concentration detection unit (211) being less than or equal to the third concentration, an instruction to close the second pump (203) is issued; and / or In response to the first receiving cavity (101) not meeting the first preset condition and the second receiving cavity (201) meeting the second preset condition, a command to open the second pump (203) is issued; Then, in response to the concentration detected by the second concentration detection component (211) being less than or equal to the third concentration, a command is issued to shut down the second pump (203). The first preset condition includes the first accommodating cavity (101) being opened or the concentration detected by the first concentration detection component (111) being greater than a fifth concentration, wherein the fifth concentration is greater than the third concentration and less than or equal to the concentration of atmospheric oxygen. The second preset condition includes the second containment cavity (201) being opened or the concentration detected by the second concentration detection component (211) being greater than the sixth concentration, wherein the sixth concentration is greater than the third concentration and less than or equal to the concentration of atmospheric oxygen.

7. The refrigerator according to claim 1, characterized in that, The first storage unit (1) further includes a first fan (105) disposed in the first receiving cavity (101) and used to blow away the boundary layer formed by nitrogen on the surface of the first oxygen separation component (102); The second storage unit (2) further includes a second fan (205) disposed in the second receiving cavity (201) and used to blow away the boundary layer formed by nitrogen on the surface of the second oxygen separation component (202).

8. The refrigerator according to claim 7, characterized in that, Multiple first oxygen separation components (102) are arranged side by side along a first direction. The first storage unit (1) also includes a first air blowing pipe (106) disposed between two adjacent first oxygen separation components (102). The first air blowing pipe (106) is provided with exhaust holes on both sides facing the two adjacent first oxygen separation components (102). One end of the first air blowing pipe (106) is configured to introduce the exhaust air of the first fan (105). Multiple second oxygen separation components (202) are arranged side by side along a second direction. The second storage section (2) also includes a second air duct (206) disposed between two adjacent second oxygen separation components (202). The second air duct (206) is provided with exhaust holes on both sides facing the two adjacent second oxygen separation components (202). One end of the second air duct (206) is configured to introduce the exhaust air of the second fan (205).

9. The refrigerator according to claim 8, characterized in that, The first storage unit (1) further includes a third fan (107) of the first oxygen separation unit (102) located at one end in the first direction, away from the first blow pipe (106), and the air outlet of the third fan (107) faces the side of the first oxygen separation unit (102) away from the first blow pipe (106). The second storage unit (2) further includes a fourth fan (207) located at one end of one of the multiple second oxygen separation components (202) in the second direction, away from the second blow pipe (206), and the outlet of the fourth fan (207) faces the side of the second oxygen separation component (202) away from the first blow pipe (106).

10. The refrigerator according to claim 2, characterized in that, The first concentration detection component (111) includes a first pressure sensor for detecting the gas pressure inside the first containment cavity (101). The controller (5) is signal-connected to the first pressure sensor and configured to calculate the oxygen concentration inside the first containment cavity (101) according to the following formula: C2 = (PO2' / P2) * 100%, where PO2' = PO2 - ΔP, ΔP = P1 - P2. PO2 = P1 * C1, in, C1 represents the percentage concentration of oxygen in the atmosphere; C2 represents the oxygen concentration in the first containment cavity after separation and deoxygenation. P1 is atmospheric pressure; The pressure inside the first containment chamber after P2 separation and deoxygenation.

Images