Deoxidizing module and refrigerator

Abstract

The deoxidizing module comprises a reaction box and an electrode assembly, the reaction box is provided with a liquid storage cavity used for containing electrolyte and an opening communicated with the liquid storage cavity, and the opening is located in the lower side face of the reaction box; the electrode assembly comprises a cathode and an anode, the cathode comprises a waterproof breathable film and an electrode plate, the waterproof breathable film covers the opening, the electrode plate is located on the lower side of the waterproof breathable film, the anode is located in the liquid storage cavity, the electrode plate is coated with an aerobic reduction reaction catalyst, and the anode is coated with an aerobic precipitation reaction catalyst; wherein the anode is provided with a plurality of exhaust ports, the diameter of each exhaust port is 2mm to 5mm, and the distance between two adjacent exhaust ports is 10mm to 15mm. And the exhaust port is formed in the anode, so that oxygen bubbles in the electrolyte can be quickly exhausted from the exhaust port, bubble accumulation is prevented, and the reaction rate of oxygen removal is favorably improved.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigerators, and in particular to a deoxygenation module and a refrigerator. Background Art

[0002] A refrigerator is a type of freezing equipment that maintains a stable low temperature, used to keep food or other items at a low temperature. For the preservation of fruits and vegetables, a low oxygen environment can inhibit respiration, inhibit the activity of certain enzymes, inhibit the production of ethylene, and effectively inhibit the growth and reproduction of aerobic bacteria, which is beneficial to the preservation of fruits and vegetables.

[0003] In the related art, the oxygen control device used in refrigerators is an electrochemical method. The anode of the oxygen control device usually uses a nickel mesh. Oxygen bubbles will be generated on the side of the anode close to the cathode. If the bubbles are not discharged in time, a short circuit area will be formed, causing the electrochemical reaction rate in this area to be greatly reduced. If the mesh of the anode is too small, the bubbles are difficult to be discharged, and if the mesh is too large, the reaction rate will be affected. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a deoxygenation module, which can quickly discharge bubbles by arranging an exhaust port on the anode.

[0005] The present invention also provides a refrigerator having the deoxygenation module.

[0006] According to the first aspect of the present invention, the deoxygenation module comprises a reaction box and an electrode assembly, wherein the reaction box has a liquid storage chamber for accommodating an electrolyte and an opening connected to the liquid storage chamber, and the opening is located on the lower side of the reaction box; the electrode assembly comprises a cathode and an anode, the cathode comprises a waterproof and breathable membrane and an electrode plate, the waterproof and breathable membrane covers the opening, the electrode plate is located on the lower side of the waterproof and breathable membrane, the anode is located in the liquid storage chamber, the electrode plate is coated with an oxygen reduction reaction catalyst, and the anode is coated with an oxygen evolution reaction catalyst; wherein the anode is a metal mesh, and the anode is provided with a plurality of exhaust ports, the diameter of the exhaust ports is 2 mm to 5 mm, and the distance between two adjacent exhaust ports is 10 mm to 15 mm.

[0007] The deoxygenation module according to the first aspect of the present invention has at least the following beneficial effects:

[0008] The liquid storage chamber of the reaction box stores electrolyte, the anode is immersed in the electrolyte, and contacts the waterproof breathable membrane, so that the waterproof breathable membrane remains moist. When the deoxygenation module is in operation, the air in the storage space contacts the cathode, and under the action of the negative potential and the oxygen reduction catalyst, the oxygen is converted into ionized oxygen, and the ionized oxygen enters the liquid storage chamber through the waterproof breathable membrane. Under the action of the positive potential and the oxygen precipitation catalyst, the ionized oxygen is converted into oxygen and precipitated. By setting an exhaust port on the anode, the oxygen bubbles in the electrolyte can be quickly discharged from the exhaust port to prevent the accumulation of bubbles, which is conducive to increasing the reaction rate of deoxygenation.

[0009] According to some embodiments of the first aspect of the present invention, the exhaust port is a circular hole, and a plurality of the exhaust ports are distributed in a plurality of rows.

[0010] According to some embodiments of the first aspect of the present invention, the mesh size of the metal mesh is 10 to 300 meshes.

[0011] According to some embodiments of the first aspect of the present invention, the distance between the cathode and the anode is 1 mm to 8 mm.

[0012] According to some embodiments of the first aspect of the present invention, the reaction box is connected to a press frame, which is located on the upper side of the anode. The press frame includes a frame and a cross bar, the frame abuts the edge of the anode, and both ends of the cross bar are connected to the frame and abut the middle of the anode.

[0013] According to some embodiments of the first aspect of the present invention, a plurality of pressing blocks are disposed on the inner wall of the liquid storage chamber, and the plurality of pressing blocks surround the press-fitting frame and abut against an upper side of the press-fitting frame.

[0014] According to some embodiments of the first aspect of the present invention, the reaction box is provided with a plurality of support rods, and the plurality of support rods are arranged at the opening, and the upper sides of the support rods abut against the anode, and the lower sides abut against the waterproof breathable membrane.

[0015] According to some embodiments of the first aspect of the present invention, the reaction box is connected to a detachable surface cover, the peripheral wall of the reaction box is provided with a plurality of buckles, the surface cover is provided with a slot matching the buckles, and a sealing ring is provided between the surface cover and the reaction box.

[0016] According to some embodiments of the first aspect of the present invention, the face cover is provided with a water replenishing port, the water replenishing port is connected to the liquid storage cavity, and the face cover is connected to a plug to close the water replenishing port.

[0017] According to some embodiments of the first aspect of the present invention, a mounting groove is provided on the upper side of the face cover, an electric control board is arranged in the mounting groove, the electric control board is electrically connected to the electrode assembly, and a protective cover is connected to the face cover, and the protective cover covers the mounting groove.

[0018] A refrigerator according to an embodiment of the second aspect of the present invention comprises a housing, a storage box and the deoxygenation module described in the embodiment of the first aspect, wherein the storage box and the deoxygenation module are located in a compartment of the housing, and the deoxygenation module is connected to the storage box.

[0019] According to some embodiments of the second aspect of the present invention, the reaction box is provided with a surrounding plate surrounding the opening, the surrounding plate is fixed to the outer wall of the storage box, and the storage box is provided with a through hole connected to the opening.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Additional aspects and advantages of the present invention will become apparent and readily understood from the following description of embodiments in conjunction with the accompanying drawings, in which:

[0022] Figure 1 This is a schematic structural diagram of a deoxygenation module according to an embodiment of the first aspect of the present invention;

[0023] Figure 2 This is an exploded schematic diagram of a deoxygenation module according to an embodiment of the first aspect of the present invention;

[0024] Figure 3 is a cross-sectional view of a reaction box and an electrode assembly;

[0025] Figure 4 This is the front view of the anode.

[0026] The figures are as follows:

[0027] Reaction box 100, liquid storage chamber 101, opening 102, oxygen exhaust port 103, buckle 104, press-fit frame 110, press block 120, support rod 130, enclosure 140;

[0028] Electrode assembly 200, cathode 210, anode 220, exhaust port 221;

[0029] The surface cover 300 , the card slot 301 , the water supply port 310 , the plug 320 , the electric control board 330 , and the protective cover 340 . DETAILED DESCRIPTION

[0030] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0031] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0032] In the description of the present invention, if there is a description of first and second, it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0033] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0034] Refrigerators are appliances used to provide a low-temperature environment to store food and other items. They are popular with users and widely used. Since refrigerators mainly use air cooling, the direct blowing of cold air causes the humidity in the refrigerator compartment to be too low, which accelerates the loss of moisture in the food compartment, especially the surface of the food. The water loss, dryness and oxidation are serious, which is particularly detrimental to the preservation of fruits and vegetables and seriously affects the taste.

[0035] Therefore, in the related art, a special storage box is set inside the refrigerator to place food ingredients. The storage box is connected to a deoxygenation module. The deoxygenation module is used to reduce the oxygen content. The low oxygen environment can inhibit respiration, inhibit the activity of certain enzymes, inhibit the production of ethylene, and effectively inhibit the growth and reproduction of aerobic bacteria, which is beneficial to the preservation of fruits and vegetables. Among them, some deoxygenation modules use electrochemical methods to separate oxygen. During the reaction, oxygen will be produced on the side of the anode close to the cathode. The oxygen gathers and forms bubbles. If the bubbles are not discharged in time, a short circuit area will be formed, and the electrochemical reaction rate in the short circuit area will be greatly reduced. Moreover, the short circuit area increases the resistance, resulting in excessive heat generation and increased energy consumption of the deoxygenation module.

[0036] Therefore, an embodiment of the first aspect of the present invention proposes a deoxygenation module, which realizes the separation of oxygen based on the electrochemical principle, and is provided with an exhaust port on the anode. The exhaust port has a large flow area, which can effectively prevent oxygen bubbles from gathering on the surface of the anode, thereby causing the holes on the anode to be blocked, resulting in the inability to discharge oxygen in time, thereby reducing the reaction rate.

[0037] Reference Figures 1 to 4The deoxygenation module proposed in the first embodiment of the present invention includes a reaction box 100 and an electrode assembly 200. The reaction box 100 is formed with a liquid storage chamber 101 to accommodate an electrolyte. The electrolyte can be selected as a 20% potassium carbonate solution. The reaction box 100 is also provided with an opening 102 connected to the liquid storage chamber 101. The opening 102 is arranged on the lower side of the reaction box 100; the electrode assembly 200 includes a cathode 210 and an anode 220. The cathode 210 includes a waterproof and breathable membrane and an electrode plate. The waterproof and breathable membrane covers the opening 102, which can prevent electrolysis. Liquid leaks out, and the electrolyte keeps the waterproof breathable membrane moist. The electrode plate is located on the lower side of the waterproof breathable membrane, and the anode 220 is located in the liquid storage chamber 101. Usually, the cathode 210 and the anode 220 are flat pieces, and there is a uniform gap between the cathode 210 and the anode 220. The gap is usually set at 1mm to 8mm. After the cathode 210 and the anode 220 are energized, a uniform electric field can be obtained. The cathode 210 and the anode 220 use the waterproof breathable membrane as a separation structure, and the waterproof breathable membrane also serves as a separation layer between air and the electrolyte.

[0038] It is understandable that the waterproof breathable membrane can be a polytetrafluoroethylene film, which can meet the requirements of ionized oxygen permeation and prevent electrolyte leakage. Since the thickness of the waterproof breathable membrane is small, the gap between the cathode 210 and the anode 220 is small, which is conducive to reducing resistance, reducing heat generation, and improving energy utilization efficiency.

[0039] The electrode plate of cathode 210 is coated with an oxygen reduction reaction catalyst, and anode 220 is coated with an oxygen evolution reaction catalyst. When air contacts cathode 210, under the action of negative potential and oxygen reduction reaction catalyst, oxygen molecules are converted into ionized oxygen. The chemical reaction formula is: O2+H2O+2e - =HO2 - +OH - , ionized oxygen can pass through the waterproof and breathable membrane, enter the liquid storage chamber 101 and contact the anode 220. Under the action of the positive potential and the oxygen evolution reaction catalyst, the ionized oxygen is converted into oxygen molecules. The chemical reaction formula is: HO2 - +OH - -2e - =O2+H2O, achieving the purpose of separating oxygen.

[0040] It is understandable that the oxygen reduction reaction catalyst can use a platinum-based catalyst, which is a general term for catalysts made with metal platinum as the main active component. Usually, platinum metal mesh, platinum black, or platinum is carried on a carrier such as alumina, and may also contain metal rhenium and other co-catalyst components. It is a catalyst often used in chemical, petroleum and chemical reactions. Platinum-based catalysts have high catalytic activity, strong selectivity, convenient catalyst preparation, and small usage. The catalytic performance can be optimized by changing and improving the manufacturing method, compounding with other metals or co-catalyst active components, etc. The oxygen precipitation reaction catalyst can use an iridium-based catalyst, which is usually a catalyst made by impregnating active metal iridium on alumina or other carriers and undergoing special treatment. According to different usage requirements, the active metal iridium content of the catalyst is usually 0.3% to 30%.

[0041] It is understandable that the position where oxygen bubbles are produced is the side of the anode 220 facing the cathode 210, and the bubbles must be discharged in time to prevent the formation of a circuit-breaking area. Therefore, a plurality of exhaust ports 221 are provided on the anode 220, the diameter of the exhaust ports 221 is 2 mm to 5 mm, and the distance between two adjacent exhaust ports 221 is 10 mm to 15 mm. The exhaust ports 221 have a sufficiently large flow area and distribution density, which can quickly discharge the bubbles and prevent the formation of a circuit-breaking area, thereby making the deoxygenation module operate efficiently.

[0042] It should be understood that the shape of the exhaust port 221 is not limited, and it can be a circular hole or a hole of other shapes. When the exhaust port 221 is a non-circular hole, the diameter refers to an equivalent diameter, which has a sufficient flow area.

[0043] It is understandable that the cathode 210 and the anode 220 are not arranged vertically because the electrolyte needs to soak the anode 220. Once the electrolyte does not soak the anode 220, the exposed part of the anode 220 is easily corroded, resulting in failure of the deoxygenation module. Therefore, the cathode 210 and the anode 220 are usually arranged horizontally. Due to the density difference between oxygen and the electrolyte, the bubbles move upward in the electrolyte. The anode 220 is usually arranged above the cathode 210 to facilitate the storage of the electrolyte. Therefore, multiple exhaust ports 221 are provided on the anode 220 to help quickly exhaust the oxygen bubbles.

[0044] When the deoxygenation module is in operation, the electrolyte is stored in the liquid storage chamber 101 of the reaction box 100, the anode 220 is immersed in the electrolyte, and contacts the waterproof breathable membrane, so that the waterproof breathable membrane remains moist. The air in the storage space is transported to the contact cathode 210, and under the action of the negative potential and the oxygen reduction catalyst, the oxygen is converted into ionized oxygen, and the ionized oxygen enters the liquid storage chamber 101 through the waterproof breathable membrane. Under the action of the positive potential and the oxygen precipitation catalyst, the ionized oxygen is converted into oxygen and precipitated. By setting the exhaust port 221 on the anode 220, the oxygen bubbles in the electrolyte can be quickly discharged from the exhaust port 221 to prevent the accumulation of bubbles, which is conducive to increasing the reaction rate of deoxygenation. The deoxygenation module uses air as a raw material, and consumes electrical energy to achieve selective separation of oxygen under normal pressure, thereby reducing the oxygen content in the storage space and achieving fruit and vegetable preservation. It has the advantages of high separation efficiency, no consumables and low cost, and improves user experience.

[0045] It is understandable that the upper end of the reaction box 100 is provided with an oxygen exhaust port 103 to exhaust oxygen. The oxygen exhausted from the oxygen exhaust port 103 has a high purity and can be collected in a special storage box or drawer to achieve a high oxygen environment. The high oxygen environment can be used to keep fresh ingredients alive, such as crabs, shrimps and other aquatic products, and can also be used for the storage of meat, which can maintain the fresh color of meat and improve the taste. Of course, the exhausted oxygen can also be discharged to the outside world, which does not affect the environment and is convenient to use.

[0046] Referring to Fig. 4, in some embodiments, the exhaust port 221 is set as a circular hole, and multiple exhaust ports 221 are set to be regularly distributed in multiple rows and columns, which is conducive to eliminating the four corners and exhausting all bubbles in time.

[0047] It is understandable that, in order to increase the contact area between the anode 220 and the electrolyte, the anode 220 is a metal mesh, such as a nickel mesh, a titanium mesh, a stainless steel mesh, etc. The metal mesh itself has micropores, but the holes of the metal mesh cannot be too large or too small, that is, the mesh number of the metal mesh needs to be precisely controlled, and the mesh number of the metal mesh should be set at 10 mesh to 300 mesh, wherein 10 mesh to 20 mesh is a preferred choice. If the mesh number of the metal mesh is too large, it is not conducive to the discharge of oxygen bubbles. If the mesh number of the metal mesh is too small, the projection area of ​​the anode 220 on the cathode 210 is too small, and the vacancy is too large, resulting in a decrease in reaction efficiency. Therefore, in some embodiments of the present invention, the anode 220 selects a nickel mesh of 10 mesh to 20 mesh, and a plurality of regularly distributed exhaust ports 221 are arranged on the nickel mesh, and the mesh of the nickel mesh and the exhaust port 221 are used to discharge oxygen bubbles together to prevent the formation of a circuit-breaking area, thereby making the deoxygenation module operate efficiently.

[0048] It should be understood that a plurality of exhaust ports 221 are provided on the metal mesh at the same time, and the area of ​​the exhaust port 221 is larger than the mesh holes of the metal mesh, that is, mesh holes and exhaust ports 221 are provided on the anode 220, and multiple columns of mesh holes and multiple columns of exhaust ports 221 are arranged in a staggered manner. The exhaust port 221 has a large flow area, which can quickly exhaust oxygen bubbles and prevent oxygen bubbles from gathering on the surface of the anode.

[0049] It is understandable that the mesh holes of the nickel mesh and the exhaust ports 221 may overlap or be independent of each other, and the distribution of the exhaust ports 221 may be adjusted according to the reaction speed and position distribution of the cathode 210 and the air.

[0050] It is understandable that the anode 220 is made of nickel mesh, but the structural strength of the nickel mesh is relatively low and it is easy to deform. Once deformed, grooves are formed, which will cause oxygen bubbles to stay in the grooves and be difficult to discharge. If the structural strength of the nickel mesh is increased by thickening, the cost of the deoxidation module will be greatly increased. Figure 2 In the embodiment of the present invention, the press-mounting frame 110 is used to press on the anode 220 to keep the anode 220 flat. The press-mounting frame 110 is connected to the reaction box 100. The press-mounting frame 110 is composed of a frame and a plurality of cross bars. The frame matches the outer peripheral shape of the anode 200. The plurality of cross bars are arranged inside the frame. The frame is used to press the edge of the anode 220, and the plurality of cross bars abut the middle of the anode 220, so that the anode 220 is kept flat. The area where the frame and the plurality of cross bars abut against the anode 220 is small, so as to minimize the obstruction to the bubbles.

[0051] Reference Figure 2 and Figure 3 It can be understood that in order to fix the press-mounted frame 110, a plurality of pressing blocks 120 are arranged on the inner wall of the liquid storage chamber 101, and the plurality of pressing blocks 120 are distributed around the circumference of the press-mounted frame 110, and the plurality of pressing blocks 120 abut against the press-mounted frame 110, and the press-mounted frame 110 and the anode 220 are fixed in the liquid storage chamber 101 by using the plurality of pressing blocks 120. The pressing blocks 120 are provided with guiding inclined surfaces to facilitate the assembly of the press-mounted frame 110, and when disassembling, the press-mounted frame 110 can be taken out by pushing away the pressing blocks 120, which is convenient for operation.

[0052] In addition, fasteners such as screws may also be provided to fix the press-fit frame 110 in the liquid storage chamber 101 , which can also meet the requirements of fixing and disassembly.

[0053] Reference Figure 2 and Figure 3In order to install the cathode 210, the reaction box 100 is also provided with a plurality of support rods 130, which are arranged side by side in the opening 102, and the two ends of the support rods 130 are fixed on the inner wall of the opening 102, and the upper sides of the plurality of support rods 130 abut against the anode 220, and the lower sides abut against the waterproof and breathable membrane of the cathode 210, and the cathode 210 is arranged on the side of the waterproof and breathable membrane away from the support rods 130, so as to facilitate contact with air. The area of ​​the plurality of support rods 130 contacting the waterproof and breathable membrane is small, so as to minimize the influence on the ionized oxygen passing through the waterproof and breathable membrane. The cathode 210 is provided with a mounting portion, and the mounting portion is fixed to the reaction box 100 or the support rod 130 by screws or buckles, so as to fix the cathode 210.

[0054] Reference Figure 1 and Figure 2 The reaction box 100 is connected to a cover 300, and the cover 300 is detachably connected to the reaction box 100, so as to facilitate the anode to be loaded into the liquid storage chamber 101. Figure 2 As shown, the peripheral wall of the reaction box 100 is provided with a plurality of buckles 104, and the surface cover 300 is provided with a slot 301 that matches the buckle 104. The slot 301 corresponds to the buckle 104 one by one. Through the cooperation of the slot 301 and the buckle 104, fixation is achieved, and disassembly and assembly are convenient. In order to improve the sealing performance and prevent the electrolyte from leaking out, a sealing ring is provided between the surface cover 300 and the reaction box 100. After the surface cover 300 and the reaction box 100 are assembled, the sealing ring is clamped to achieve sealing.

[0055] It is understandable that in order to inject electrolyte into the liquid storage chamber 101 and replenish the electrolyte, a water replenishment port 310 is provided on the surface cover 300, and the water replenishment port 310 is connected to the liquid storage chamber 101. The water replenishment port 310 is provided with a diversion bell mouth to facilitate the electrolyte to flow into the liquid storage chamber 101. In addition, the surface cover 300 is connected with a plug 320, and the plug 320 is used to close the water replenishment port 310, which can prevent the electrolyte from leaking out, and can also isolate the liquid storage chamber 101 to prevent the electrolyte from being contaminated. The plug 320 and the surface cover 300 can be connected by a threaded connection, which is convenient for disassembly and assembly, and has a reliable seal.

[0056] Reference Figure 2 The upper side of the cover 300 is also provided with a mounting groove for arranging an electric control board 330. The electric control board 330 is electrically connected to the electrode assembly 200 to supply power to the electrode assembly 200 and control the operation of the electrode assembly 200. In order to prevent the electric control board 330 and the wiring position from contacting water vapor, a protective cover 340 is connected to the cover 300. The protective cover 340 covers the electric control board 330 and the wiring position to play an isolating role, which is beneficial to protecting the electric control board 330 and the wiring position.

[0057] The refrigerator of the second embodiment of the present invention comprises a box body, a storage box and the deoxygenation module of the first embodiment, the storage box and the deoxygenation module are both arranged in the compartment of the box body, and the inner cavity of the storage box is the storage space for food. The deoxygenation module includes a reaction box 100 and an electrode assembly 200. The reaction box 100 is internally formed with a liquid storage chamber 101 to accommodate an electrolyte. The electrolyte can be a 20% potassium carbonate solution. The reaction box 100 is also provided with an opening 102 connected to the liquid storage chamber 101, and the opening 102 is arranged on the lower side of the reaction box 100; the electrode assembly 200 includes a cathode 210 and an anode 220. The cathode 210 includes a waterproof breathable membrane and an electrode plate. The waterproof breathable membrane covers the opening 102 to prevent leakage of the electrolyte, and the electrolyte keeps the waterproof breathable membrane moist. The electrode plate is located on the lower side of the waterproof breathable membrane, and the anode 220 is located in the liquid storage chamber 101. The cathode 210 and the anode 220 use the waterproof breathable membrane as a separation structure, and the waterproof breathable membrane also serves as a separation layer between air and the electrolyte.

[0058] The electrode plate of cathode 210 is coated with an oxygen reduction reaction catalyst, and anode 220 is coated with an oxygen evolution reaction catalyst. When air contacts cathode 210, under the action of negative potential and oxygen reduction reaction catalyst, oxygen molecules are converted into ionized oxygen. The chemical reaction formula is: O2+H2O+2e - =HO2 - +OH - , ionized oxygen can pass through the waterproof and breathable membrane, enter the liquid storage chamber 101 and contact the anode 220. Under the action of the positive potential and the oxygen evolution reaction catalyst, the ionized oxygen is converted into oxygen molecules. The chemical reaction formula is: HO2 - +OH - -2e - =O2+H2O, achieving the purpose of separating oxygen.

[0059] It is understandable that the position where oxygen molecules are produced is the side of the anode 220 facing the cathode 210, and the oxygen molecules gather into bubbles, which gather on the surface of the anode 220. The bubbles must be discharged in time to prevent the formation of a circuit-breaking area. Therefore, a plurality of exhaust ports 221 are provided on the anode 220, and the diameter of the exhaust ports 221 is 2mm to 5mm, and the distance between two adjacent exhaust ports 221 is 10mm to 15mm. The exhaust ports 221 have a sufficiently large flow area and distribution density, and can quickly discharge bubbles to prevent the formation of a circuit-breaking area, thereby making the deoxygenation module operate efficiently.

[0060] When the deoxygenation module is in operation, the electrolyte is stored in the liquid storage chamber 101 of the reaction box 100, the anode 220 is immersed in the electrolyte, and contacts the waterproof breathable membrane, so that the waterproof breathable membrane remains moist. The air in the storage space is transported to the contact cathode 210, and under the action of the negative potential and the oxygen reduction catalyst, the oxygen is converted into ionized oxygen, and the ionized oxygen enters the liquid storage chamber 101 through the waterproof breathable membrane. Under the action of the positive potential and the oxygen precipitation catalyst, the ionized oxygen is converted into oxygen and precipitated. By setting the exhaust port 221 on the anode 220, the oxygen bubbles in the electrolyte can be quickly discharged from the exhaust port 221 to prevent the accumulation of bubbles, which is conducive to increasing the reaction rate of deoxygenation. The deoxygenation module uses air as a raw material, and consumes electrical energy to achieve selective separation of oxygen under normal pressure, thereby reducing the oxygen content in the storage space and achieving fruit and vegetable preservation. It has the advantages of high separation efficiency, no consumables and low cost, and improves user experience.

[0061] It is understandable that, referring to Figure 1 and Figure 2 The reaction box 100 of the deoxygenation module is provided with a surrounding plate 140 surrounding the opening 102. The surrounding plate 140 is fixedly connected to the outer wall of the storage box, and a through hole connected to the opening 102 is provided in the storage box. The air in the storage box directly contacts the cathode 210 of the deoxygenation module. The deoxygenation module is used to separate the oxygen in the air, and the remaining nitrogen is transported back to the storage space of the storage box to obtain a low-oxygen environment, which helps to keep the food fresh.

[0062] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A deoxidation module, characterized in that: include: A reaction box, comprising a liquid storage cavity for containing electrolyte and an opening communicating with the liquid storage cavity, wherein the opening is located on the lower side of the reaction box; An electrode assembly, comprising a cathode and an anode, wherein the cathode comprises a waterproof breathable membrane and an electrode plate, wherein the waterproof breathable membrane covers the opening, the electrode plate is located at the lower side of the waterproof breathable membrane, the anode is located in the liquid storage cavity, the electrode plate is coated with an oxygen reduction reaction catalyst, and the anode is coated with an oxygen evolution reaction catalyst; The anode is a metal mesh, and is provided with a plurality of exhaust ports, the diameter of the exhaust ports is 2 mm to 5 mm, and the distance between two adjacent exhaust ports is 10 mm to 15 mm.

2. The deoxidation module according to claim 1, characterized in that: The exhaust port is a circular hole, and a plurality of the exhaust ports are distributed in a plurality of rows.

3. The deoxidation module according to claim 1 or 2, characterized in that: The mesh number of the metal mesh is 10 meshes to 300 meshes.

4. The deoxidation module according to claim 1 or 2, characterized in that: The distance between the cathode and the anode is 1 mm to 8 mm.

5. The deoxidation module according to claim 1, characterized in that: The reaction box is connected with a press frame, which is located on the upper side of the anode. The press frame includes a frame and a cross bar. The frame abuts against the edge of the anode, and the two ends of the cross bar are connected to the frame and abut against the middle of the anode.

6. The deoxidation module according to claim 5, characterized in that: The inner wall of the liquid storage cavity is provided with a plurality of pressing blocks, the plurality of pressing blocks surround the press-fitting frame and abut against the upper side of the press-fitting frame.

7. The deoxidation module according to claim 6, characterized in that: The reaction box is provided with a plurality of support rods, and the plurality of support rods are arranged at the opening, and the upper side of the support rods abuts against the anode, and the lower side abuts against the waterproof breathable membrane.

8. The deoxidation module according to claim 1, characterized in that: The reaction box is connected with a detachable surface cover, the peripheral wall of the reaction box is provided with a plurality of buckles, the surface cover is provided with a clamping groove matching the buckles, and a sealing ring is provided between the surface cover and the reaction box.

9. The deoxidation module according to claim 8, characterized in that: The surface cover is provided with a water replenishing port, the water replenishing port is connected to the liquid storage cavity, and the surface cover is connected with a plug to close the water replenishing port.

10. The deoxidation module according to claim 8, characterized in that: The upper side of the surface cover is provided with a mounting groove, in which an electric control board is arranged, and the electric control board is electrically connected to the electrode assembly. The surface cover is connected with a protective cover, and the protective cover covers the mounting groove.

11. A refrigerator, characterized in that It comprises a box body, a storage box and a deoxygenation module as claimed in any one of claims 1 to 10, wherein the storage box and the deoxygenation module are located in a compartment of the box body, and the deoxygenation module is connected to the storage box.

12. The refrigerator according to claim 11, characterized in that: The reaction box is provided with a surrounding plate surrounding the opening, the surrounding plate is fixed to the outer wall of the storage box, and the storage box is provided with a through hole communicating with the opening.

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