Preservation device and refrigerator

Abstract

This invention discloses a food preservation device and a refrigerator with the food preservation device. The food preservation device includes a storage container, an air inlet pipe, an air outlet pipe, a controlled atmosphere device, and a baffle device. The storage container has a storage space, and the air inlet pipe and air outlet pipe are connected to the storage space. The controlled atmosphere device is also connected to the storage space. The air inlet and air outlet pipes are configured to slow down the diffusion of oxygen from outside the storage container to the inside when the baffle device is not working, and to accelerate the exchange of air between the storage space and the outside of the storage container when the baffle device is working. The air inlet and air outlet pipes are long pipes with small inner diameters. Since the rate of oxygen diffusion is inversely proportional to distance or area, the oxygen concentration difference between the inside and outside can be maintained within a stable range for a long time when the baffle device is not working. When the baffle device is working, it can accelerate the discharge of high-humidity air from the storage container through the air outlet pipe, solving the problem of condensation inside the storage container.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of preservation, in particular to a preservation device and a refrigerator. BACKGROUND

[0002] Fruits, vegetables and other food materials need to be stored in a controlled atmosphere to inhibit respiration and prolong the storage life. The storage container is generally in a closed state to maintain the concentration of the gas at a constant value or within a certain range. However, the fruits, vegetables and other food materials placed in the storage container still have moisture evaporation, resulting in high humidity air in the storage container, which is prone to condensation and water droplets falling on the food materials, accelerating spoilage. In related technologies, a duct solution is used to solve the above problems. The fan needs to be used in series with the air door. The air door is opened when the fan is working to exhaust the high humidity air. The air door is closed when the fan is off to make the storage container in a closed state, so as to continue to adjust the concentration of the gas. In this solution, the air door is large in size and needs to be assembled with a duct assembly, which is difficult to assemble and high in cost. SUMMARY

[0003] The present application aims to at least solve one of the technical problems in the prior art. To this end, the present application provides a preservation device capable of exhausting high humidity air, reducing the number of parts, and reducing assembly difficulty and cost.

[0004] The present application also provides a refrigerator having the above preservation device.

[0005] The preservation device according to the first aspect of the present application comprises a storage container, an air inlet pipe, an air outlet pipe, a gas control device and a turbulence device. The storage container is provided with a storage space. The air inlet pipe is connected to the storage space. The air outlet pipe is connected to the storage space. The gas control device is connected to the storage space and is used to reduce the oxygen concentration. The air inlet pipe and the air outlet pipe are configured to slow down the diffusion of oxygen from the outside of the storage container to the inside of the storage container when the turbulence device is not working, and to accelerate the exchange of air in the storage space with the air outside the storage container when the turbulence device is working.

[0006] The preservation device according to embodiments of the present invention has at least the following beneficial effects: It replaces the damper with an air inlet pipe and an air outlet pipe, both of which are long pipes with inner diameters smaller than the damper. Since the speed of oxygen diffusion is inversely proportional to distance or area, an oxygen concentration gradient exists within the pipe; the longer the pipe or the smaller its inner diameter, the slower the diffusion speed. Therefore, when the turbulence device is not working, oxygen diffuses naturally through the air inlet and outlet pipes. Due to the long pipes and small inner diameters, the diffusion speed is very slow, and the oxygen concentration difference between the inside and outside can be maintained within a stable range for a long time. When the turbulence device is working, it can accelerate the discharge of high-humidity air from the storage container through the air outlet pipe, while simultaneously injecting low-humidity air from the outside through the air inlet pipe. This solution solves the problem of condensation inside the storage container, while also providing a certain degree of sealing, reducing the number of parts, simplifying assembly, and lowering costs.

[0007] According to some embodiments of the present invention, at least one of the air inlet pipe and the air outlet pipe has an inner diameter of less than or equal to 5 mm.

[0008] According to some embodiments of the present invention, at least one of the air inlet pipe and the air outlet pipe has a length greater than or equal to 80 mm.

[0009] According to some embodiments of the present invention, the number of air inlet pipes ranges from 1 to 5, and the number of air outlet pipes ranges from 1 to 5.

[0010] According to some embodiments of the present invention, the storage container is provided with a transition cavity, the air outlet pipe is connected to the transition cavity, and the turbulence device blows air into the transition cavity.

[0011] According to some embodiments of the present invention, the preservation device includes a mounting cover connected to the storage container to define a receiving space, the receiving space having a partition that divides the receiving space into a transition cavity and a mounting cavity, the turbulence device being disposed in the mounting cavity, and the partition having a communication port connecting the transition cavity and the mounting cavity.

[0012] According to some embodiments of the present invention, the partition is provided with an air guide protrusion surrounding the communication port, the air guide protrusion abutting against the air outlet end of the turbulence device.

[0013] According to some embodiments of the present invention, the inner wall of the storage container is provided with an annular protrusion, and the mounting cover is fitted onto the annular protrusion to form the accommodating space.

[0014] According to some embodiments of the present invention, the air outlet end of the turbulence device is connected to the air outlet pipe.

[0015] According to some embodiments of the present invention, the controlled atmosphere device is a deoxygenation module.

[0016] According to some embodiments of the present invention, when the turbulence device is not working and the controlled atmosphere device is working, the oxygen concentration in the storage space is less than the oxygen concentration outside the storage container, and the difference is greater than or equal to 1% under equilibrium conditions.

[0017] A refrigerator according to a second aspect embodiment of the present invention includes the preservation device of the first aspect embodiment of the present invention.

[0018] The refrigerator according to the embodiments of the present invention has at least the following beneficial effects: by adopting the preservation device of the first aspect embodiment of the present invention, the problem of condensation inside the storage container is solved, while having a certain degree of sealing, reducing the number of parts, reducing assembly difficulty, and reducing costs.

[0019] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0021] Figure 1 This is a schematic diagram of a food preservation device according to an embodiment of the present invention;

[0022] Figure 2 for Figure 1 A top view of the preservation device shown;

[0023] Figure 3 for Figure 2 The AA section view shown;

[0024] Figure 4 This is a schematic diagram of a preservation device according to another embodiment of the present invention;

[0025] Figure 5 for Figure 4 The diagram shown is a schematic of the preservation device after the box body has been removed;

[0026] Figure 6 for Figure 4 An exploded view of the preservation device after the container has been removed;

[0027] Figure 7 for Figure 5 The BB cross-sectional view shown;

[0028] Figure 8 for Figure 6 A schematic diagram of the cover is shown.

[0029] Figure label:

[0030] 101. Storage container; 102. Air inlet duct; 103. Air outlet duct; 104. Controlled atmosphere device;

[0031] 301. Storage space; 302. Fan; 303. Transition chamber; 304. Connecting port; 305. Air outlet; 306. Air inlet; 307. Barrel body; 308. Drawer; 309. Casters; 310. Air inlet protrusion; 311. Air outlet protrusion;

[0032] 401. Box body; 402. Lid body;

[0033] 501. Annular protrusion; 502. Mounting cover;

[0034] 601. Snap-fit ​​hole; 602. Ventilation hole; 603. Windshield protrusion;

[0035] 701. Partition; 702. Mounting cavity;

[0036] 801. Snap-fit ​​protrusion; 802. Air guide protrusion. Detailed Implementation

[0037] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0038] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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. Therefore, they should not be construed as limiting this invention.

[0039] In the description of this invention, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0040] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0041] Modified atmosphere storage (MAP) technology generally refers to the technique of extending the shelf life of food by adjusting the gas atmosphere (gas composition ratio or gas pressure) of the enclosed space where the stored food is located. Its basic principle is to create a gas atmosphere with a different composition than normal air within a certain enclosed space through various adjustment methods, thereby inhibiting the physiological and biochemical processes and microbial activities that lead to spoilage of the stored food (usually ingredients). Specifically, in this application, the MAP discussed specifically refers to MAP technology that adjusts the gas composition ratio.

[0042] Normal atmospheric oxygen content is 20.9%, carbon dioxide content is 0.03%, and nitrogen content is 78%. Modified atmosphere storage technology, on the basis of low-temperature storage, adjusts the content of oxygen, carbon dioxide, and nitrogen in the air, that is, changes the gas composition of the storage environment. By reducing the oxygen content and increasing the concentration of carbon dioxide or nitrogen, the gas composition is maintained in the desired state according to the different requirements of the stored products.

[0043] Fresh fruits and vegetables continue to undergo vigorous respiration and evaporation after harvesting, absorbing oxygen from the air, decomposing and consuming their own nutrients, and producing carbon dioxide, water, and heat. Since respiration consumes the nutrients the fruits and vegetables themselves possess after harvesting, the key to extending their storage life is to reduce the respiration rate. Changes in the gas composition of the storage environment have a significant impact on the physiology of fruits and vegetables after harvesting. Low oxygen levels can effectively inhibit respiration, reducing evaporation and microbial growth to some extent. Appropriately high concentrations of carbon dioxide can slow down respiration, delaying the onset of the respiratory climacteric in fruits and vegetables, thus slowing down ripening and senescence. Controlled atmosphere storage is the only way to effectively inhibit respiration in fruits and vegetables, delaying senescence (ripening and aging) and related physiological and biochemical changes, thereby extending their shelf life.

[0044] Based on the principle of modified atmosphere storage, modified atmosphere preservation can be divided into active modified atmosphere storage and passive modified atmosphere storage. Active modified atmosphere storage refers to artificially controlling the concentration of gases at a constant value or range during storage. For example, it can be achieved by consuming oxygen to reduce the volume concentration of oxygen, or by removing some air and filling it with nitrogen to increase the volume concentration of nitrogen.

[0045] In order to keep the gas concentration at a constant value or range, it is generally believed in the technology that a sealed storage container is needed. Otherwise, the gas inside the storage container is in contact with the outside gas, and the gas concentration inside the storage container fluctuates greatly, making it difficult to control it at a constant value or range.

[0046] It is understandable that when fruits, vegetables, and other food items are placed in a sealed space, they can still evaporate moisture. However, the moisture cannot escape and continues to accumulate in the sealed space, causing condensation to form inside the food storage area. The longer this happens, the more water will condense inside the food storage area, resulting in condensation that affects the use of the product.

[0047] To reduce humidity in storage containers and prevent condensation, related technologies employ a damper on the container, a duct assembly connected to it, and a fan inside. The fan and damper are connected in series; when the fan operates, the damper opens, forcing gas from the container to flow towards the damper and out through the duct assembly, thus drawing gas out of the container and reducing humidity. When the fan shuts off, the damper closes to maintain a sealed container, keeping the gas concentration within a constant value or range. However, this approach requires a large damper and a duct assembly, resulting in numerous parts, high assembly difficulty, and high cost.

[0048] The following reference Figures 1 to 8 This explains how the preservation device of the present invention solves the above-mentioned problems.

[0049] Reference Figures 1 to 3 As shown, it can be understood that the preservation device of this embodiment includes a storage container 101, an air inlet pipe 102, a fan 302, and an air outlet pipe 103. The storage container 101 has a storage space 301 inside, the air inlet pipe 102 is connected to the storage space 301, the air outlet pipe 103 is also connected to the storage space 301, and the fan 302 is disposed in the storage space 301.

[0050] Understandably, when the fan 302 is working, a pressure difference is formed in the air inlet pipe 102 and the air outlet pipe 103, and the gas flows. Since the airflow speed is much greater than the diffusion speed through the concentration difference, the air inside the storage container 101 is quickly discharged to the outside, while the outside air enters the storage container 101 through the air inlet pipe 102 to reduce the humidity of the storage container 101, and the oxygen concentration inside and outside reaches a dynamic balance.

[0051] When the fan 302 is not working, external oxygen diffuses naturally into the storage container 101 through the inlet pipe 102 and the outlet pipe 103. Because the inlet pipe 102 and the outlet pipe 103 are long and have small inner diameters, the diffusion speed is very slow, and the oxygen concentration difference between the inside and outside can be maintained within a stable range for a long time. Since the speed of oxygen diffusion is inversely proportional to distance or area, an oxygen concentration gradient exists within the pipe; the longer the pipe or the narrower the inner diameter, the slower the diffusion speed.

[0052] Therefore, when the fan 302 is working, the preservation device of this embodiment can accelerate the flow of high-humidity air inside to the outside, thereby achieving dehumidification and reducing the risk of condensation. When the fan 302 is not working, the air inlet pipe 102 and the air outlet pipe 103 can slow down the diffusion rate of oxygen, so that the internal oxygen concentration can be maintained within a preset range.

[0053] It should be noted that the fan 302 can also be replaced by a flow-disrupting device such as an air pump, as long as it can promote gas convection. The air pump can be installed inside or outside the storage container 101, and connected to the storage space 301 through the air outlet duct 103.

[0054] It is understandable that the inner diameter of the air inlet pipe 102 and the air outlet pipe 103 can be 6mm, 5mm, 4mm and 3mm, and the length of the air inlet pipe 102 and the air outlet pipe 103 can be 70mm, 80mm, 90mm and 100mm.

[0055] Since the speed of oxygen diffusion is inversely proportional to distance or area, the longer the pipe or the smaller its inner diameter, the slower the diffusion speed. When choosing a larger inner diameter for the inlet pipe 102 and the outlet pipe 103, a longer length for both should be chosen, which also helps to slow down the oxygen diffusion speed. Similarly, when choosing a smaller inner diameter for the inlet pipe 102 and the outlet pipe 103, a shorter length for both can be chosen to make better use of materials and reduce resistance when exhausting moisture.

[0056] For example, in some embodiments, the inner diameter of the air inlet pipe 102 and the air outlet pipe 103 can be selected to be 5 mm and the length to be 80 mm. In other embodiments, the inner diameter of the air inlet pipe 102 and the air outlet pipe 103 can be selected to be 3 mm and the length to be 50 mm.

[0057] It is understandable that outside air enters the storage space 301 through the air inlet duct 102. The air inlet area is the cross-sectional area of ​​the air inlet duct 102. When there are multiple air inlet ducts 102, the air inlet area is the sum of the cross-sectional areas of all the air inlet ducts 102. Therefore, in order to increase the air intake without increasing the oxygen diffusion rate, the number of air inlet ducts 102 can be increased. The number of air inlet ducts 102 can be selected from 1 to 5. Similarly, the number of air outlet ducts 103 can be selected from 1 to 5.

[0058] It should be noted that, depending on actual needs, the number of air inlet pipes 102 and air outlet pipes 103 can also be greater than 5.

[0059] Reference Figure 3As shown, the storage container 101 is provided with a transition cavity 303, which has a connecting port 304, connecting the transition cavity 303 to the storage space 301. The storage container 101 is provided with an air outlet 305, and the air outlet pipe 103 connects to the transition cavity 303 through the air outlet 305. The air inlet of the fan 302 faces the middle of the storage space 301, and the air outlet of the fan 302 faces the connecting port 304 of the transition cavity 303. When the fan 302 is working, it delivers the high-humidity air in the storage space 301 to the transition cavity 303. The high-humidity air concentrates in the transition cavity 303, forming a high pressure. A pressure difference is formed in the air outlet pipe 103, and the gas flows faster. Since the airflow velocity is much greater than the velocity of diffusion through the concentration difference, the internal air is quickly discharged to the outside.

[0060] The storage container 101 is provided with an air inlet 306, and the air inlet pipe 102 is connected to the storage space 301 through the air inlet 306. As some of the air in the storage space 301 is discharged, a low pressure is formed, creating an air pressure difference in the air inlet pipe 102. The gas flows faster, and external air enters the storage container 101 through the air inlet pipe 102, that is, external low-humidity air is injected through the air inlet 306, so that the internal and external pressures of the storage container 101 are balanced.

[0061] Reference Figure 3 As shown, it can be understood that the storage container 101 may include a barrel 307 and a drawer 308. The barrel 307 is provided with a storage space and also has an opening located on the front face of the barrel 307, which communicates with the storage space. The drawer 308 enters the storage space through the opening and can be accommodated in the storage space. At the same time, the panel of the drawer 308 closes the opening, forming a closed storage space 301.

[0062] It is understood that the left and right sides of drawer 308 are engaged with the barrel 307 via rollers 309 to achieve a sliding engagement between drawer 308 and barrel 307, so as to facilitate the pulling out of drawer 308. The inner wall of barrel 307 is provided with a sliding groove (not shown in the figure), and the side wall of drawer 308 is equipped with rollers 309. The axial direction of rollers 309 is consistent with the left and right direction. Rollers 309 abut against the groove wall and can roll along the guide direction of the groove.

[0063] Understandably, drawer 308 also has a support beam (not shown in the figure) on its side wall, the length of which is the same as the guide direction of the slide rail. The support beam protrudes from the side wall of drawer 308, facilitating the installation of rollers 309 and enabling their engagement with the slide rail. Rollers 309 abut against the wall of the slide rail and can roll along its length. Through the engagement of rollers 309 and the slide rail, drawer 308 and the body 307 achieve a sliding engagement, with low rolling friction, smooth drawer 308 operation, and ease of use. Of course, drawer 308 and body 307 can also achieve a sliding engagement using a slide rail and slider.

[0064] Reference Figure 1 and Figure 3 As shown, it can be understood that the air inlet 306 is located below the barrel 307, and the air outlet 305 is located above the barrel 307. That is, the air inlet pipe 102 is arranged below the barrel 307, and the air outlet pipe 103 is arranged above the barrel 307. The air inlet 306 and the air outlet 305 are located on the upper and lower sides of the barrel 307, respectively, which can extend the distance of air flow, allowing newly added air to enter from the lower part of the barrel 307, while the original high-humidity air inside the barrel 307 flows out from the upper part of the barrel 307, which is conducive to achieving rapid dehumidification.

[0065] Reference Figure 3 As shown, it can be understood that an air inlet protrusion 310 is provided at the bottom of the barrel 307, an air inlet 306 passes through the air inlet protrusion 310, and an air inlet pipe 102 is fitted onto the air inlet protrusion 310. The air inlet pipe 102 includes a first bend and a first horizontal part. The first bend is fitted onto the air inlet protrusion 310, and the first horizontal part is connected to the first bend, thereby changing the direction of air intake and helping to slow down the rate of oxygen diffusion.

[0066] Similarly, an air outlet protrusion 311 is provided on the top of the barrel 307, and an air outlet 305 passes through the air outlet protrusion 311. An air outlet pipe 103 is fitted onto the air outlet protrusion 311. The air outlet pipe 103 includes a second bend and a second horizontal section. The second bend is fitted onto the air outlet protrusion 311, and the second horizontal section is connected to the second bend, thereby changing the air outlet direction and helping to slow down the rate of oxygen diffusion.

[0067] Reference Figures 1 to 3 As shown, it can be understood that the preservation device also includes a controlled atmosphere device 104, which is used to adjust the gas concentration in the storage space 301 so that the gas concentration is always controlled at a certain constant value or range. The controlled atmosphere device 104 can be an oxygen removal module or a nitrogen generator, and both the oxygen removal module and the nitrogen generator are connected to the storage space 301.

[0068] The deoxygenation module uses an electrochemical method for deoxygenation. Specifically, the deoxygenation module replaces the oxygen in the storage space 301 with oxygen outside the storage container through an oxidation-reduction reaction and discharges the oxygen outside the preservation device, thereby creating a nitrogen-rich and oxygen-poor environment in the storage space 301, which is beneficial for the preservation of fruits and vegetables.

[0069] One embodiment of the deoxygenation module includes a housing, an anode, and a cathode. The cathode is a composite soft planar membrane comprising a catalyst layer, a nickel electrode, and a waterproof and breathable membrane. The anode is a nickel electrode. An electrolysis chamber is disposed within the housing. The housing has an air inlet and an exhaust port. The air inlet is connected to the storage container 101 and the electrolysis chamber, allowing gas in the storage space 301 to enter the electrolysis chamber through the air inlet. The exhaust port is connected to the electrolysis chamber, allowing gas generated by the oxidation-reduction reaction in the electrolysis chamber to be discharged through the exhaust port.

[0070] The nitrogen generator creates a nitrogen-rich, oxygen-deficient preservation atmosphere by filling a closed space with nitrogen-rich gas to reduce the oxygen content. As those skilled in the art will understand, nitrogen-rich gas refers to a gas with a nitrogen content exceeding that of normal air, for example, a nitrogen content of 95%-99%, or even higher; while a nitrogen-rich, oxygen-deficient preservation atmosphere refers to a gas atmosphere with a nitrogen content exceeding that of normal air and an oxygen content lower than that of normal air. Specifically, the nitrogen generator evacuates the storage space 301 and then fills the storage space 301 with the generated nitrogen gas.

[0071] In some embodiments, the nitrogen generating device includes a housing, a vacuum pump, an adsorption cylinder, and a nitrogen storage tank. The housing is provided with an outlet. The vacuum pump has a pump inlet pipe and a pump outlet pipe. An oxygen adsorbent is disposed inside the adsorption cylinder, which has a cylinder inlet pipe and a cylinder outlet pipe. The cylinder inlet pipe is connected to both the pump inlet pipe and the pump outlet pipe. A first three-way valve is connected between the cylinder inlet pipe and the pump inlet pipe, and a second three-way valve is connected between the cylinder inlet pipe and the pump outlet pipe. Both the first and second three-way valves are in communication with a refrigerated space. A third three-way valve is connected between the pump inlet pipe and the first three-way valve, and the third three-way valve is also connected to the outlet. The nitrogen storage tank has a tank inlet pipe and a tank outlet pipe. The tank inlet pipe is connected to the cylinder outlet pipe, and the tank outlet pipe is connected to the outlet. It should be noted that the first, second, and third three-way valves are all electrically controlled three-way valves, and all three are controlled by a controller. It should also be noted that oxygen adsorbents can be selected from carbon molecular sieves, zeolites, etc.

[0072] During the vacuuming process, the vacuum pump draws air from the containment space at a certain negative pressure through the third three-way valve and discharges it into the cold storage compartment.

[0073] During the adsorption process, a vacuum pump injects air at a controlled positive pressure into the adsorption cylinder, and the oxygen adsorbent adsorbs the oxygen from the injected air. The prepared nitrogen gas enters the nitrogen storage tank from the outlet of the adsorption cylinder, and the outlet pipe of the nitrogen storage tank is connected to the containment space to supply nitrogen gas. During the desorption process, a vacuum pump draws air from the adsorption cylinder at a controlled negative pressure, making it easier for oxygen to desorb from the oxygen adsorbent and be discharged.

[0074] It is understandable that when the fan 302 is working, a pressure difference is formed in the pipe of the air outlet 103, and the gas flows. Since the airflow speed is much greater than the speed of diffusion through the concentration difference, the internal air is quickly discharged to the outside, while the external air enters the storage container 101 through the air inlet 102, and the oxygen concentration inside and outside tends to be in equilibrium.

[0075] When the fan 302 is not working and the controlled atmosphere device 104 is working, the controlled atmosphere device 104 reduces the oxygen concentration in the storage space 301. The oxygen concentration in the storage space 301 is lower than the external oxygen concentration. The external oxygen diffuses naturally into the storage space 301 through the air inlet pipe 102 and the air outlet pipe 103. Due to the long pipeline, the diffusion speed is very slow, and the difference in oxygen concentration between the inside and outside can be maintained for a long time. Under equilibrium conditions, the difference is greater than or equal to 1%. Here, equilibrium conditions mean that the oxygen concentration in the storage space 301 is always controlled at a certain constant value or range.

[0076] Reference Figure 4 As shown, it can be understood that the storage container 101 may also include a box body 401 and a lid 402. The box body 401 is provided with a storage space and also has an opening located on the upper surface of the box body 401, which communicates with the storage space. The lid 402 covers the box body 401, closing the opening and forming a closed storage space 301.

[0077] Reference Figure 4 As shown, it can be understood that both the air inlet pipe 102 and the air outlet pipe 103 are mounted on the cover 402. Both the air inlet pipe 102 and the air outlet pipe 103 include a fixing part and a sleeve part. The fixing part is integrally formed with the cover 402 for ease of manufacturing, and the sleeve part is fitted onto the fixing part to extend the length of the pipe. The air inlet pipe 102 and the air outlet pipe 103 are mounted on the cover 402 for easy assembly.

[0078] Reference Figure 5 and Figure 6 As shown, it can be understood that the fan 302 is installed inside the cover 402 and located near the air outlet 103. The fan 302 can easily draw away the high humidity air in the storage space and deliver it to the air outlet 103, and discharge it from the storage container 101.

[0079] Reference Figure 5 , Figure 7 andFigure 8 As shown, it can be understood that an annular protrusion 501 is provided on the inner side of the cover 402. The preservation device also includes a mounting cover 502, which covers the annular protrusion 501 to form an accommodating space. The annular protrusion 501 has a snap-fit ​​protrusion 801 on its periphery, and the mounting cover 502 has snap-fit ​​holes 601 around its periphery. The snap-fit ​​protrusion 801 and the snap-fit ​​hole 601 cooperate to achieve a snap-fit ​​engagement between the mounting cover 502 and the annular protrusion 501.

[0080] It is understandable that the mounting cover 502 and the annular protrusion 501 can also be connected by screws, threads, or other means.

[0081] It should be noted that the mounting cover 502 can also be directly connected to the cover body 402 via screws or a snap-fit ​​structure.

[0082] Reference Figure 7 and Figure 8 As shown, the accommodating space is divided into two parts by a partition 701: a transition cavity 303 and a mounting cavity 702. A fan 302 is located within the mounting cavity 702, and an air outlet 305 connects to the transition cavity 303. The partition 701 has a connecting port 304 that connects the transition cavity 303 and the mounting cavity 702. A ventilation hole 602 is provided on the mounting cover 502, connecting the mounting cavity 702 and the storage space. When the fan 302 operates, it draws air from the storage space and then delivers it to the transition cavity 303 through the connecting port 304. The increased pressure in the transition cavity 303 creates a pressure difference within the air outlet duct 103, causing air flow, and ultimately, the air is discharged from the air outlet 305. By providing the transition cavity 303, the air blown by the fan 302 can be more concentrated, accelerating airflow and improving the efficiency of discharging the high-humidity air from the interior to the outside. The fan 302 can be connected to the cover 402 by a snap-fit ​​structure and screws.

[0083] It should be noted that in some other embodiments, the annular protrusion 501 and the mounting cover 502 may only define the transition cavity 303, while the fan 302 is disposed outside the annular protrusion 501 and the mounting cover 502. For example, a partition or interlayer may be provided to separate the fan 302 from the food.

[0084] It should also be noted that the preservation device may not have a transition chamber 303. Instead, the air outlet of the fan 302 can directly abut against the end face of the air outlet 305. That is, the air outlet of the fan 302 can be directly connected to the air outlet pipe 103, or the air outlet of the fan 302 can face the air outlet 305 to discharge the gas from the storage space.

[0085] Reference Figure 8As shown, the partition 701 is provided with a guide protrusion 802. The guide protrusion 802 is located on the side of the partition 701 near the fan 302 and surrounds the connecting port 304. The air outlet of the fan 302 abuts against the guide protrusion 802. The guide protrusion 802 guides the air blown by the fan 302 into the transition cavity 303, reducing air leakage, making the air volume more concentrated, and improving the efficiency of exhausting the high-humidity air inside to the outside. The guide protrusion 802 can be integrally formed with the partition 701 or it can be a sealing gasket.

[0086] Reference Figure 6 As shown, it is understandable that in order to improve the air guiding effect, a windproof protrusion 603 is also provided on the mounting cover 502. The windproof protrusion 603, together with the air guiding protrusion 802 or the partition 701, further reduces the leakage of air volume, makes the air volume more concentrated, and improves the efficiency of exhausting the high humidity air inside to the outside.

[0087] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A food preservation device, characterized in that, include: Storage container with storage space; The air inlet duct connects to the storage space; The air outlet duct connects to the storage space; A controlled atmosphere device, connected to the storage space, is used to reduce the oxygen concentration; Fluctuation devices; The air inlet pipe and the air outlet pipe are configured to slow down the diffusion rate of oxygen from outside the storage container into the storage container when the turbulence device is not working, and to accelerate the exchange of air between the storage space and the outside of the storage container when the turbulence device is working.

2. The preservation device according to claim 1, characterized in that, At least one of the air inlet pipe and the air outlet pipe has an inner diameter of less than or equal to 5 mm.

3. The preservation device according to claim 1, characterized in that, At least one of the air inlet pipe and the air outlet pipe has a length greater than or equal to 80 mm.

4. The preservation device according to claim 2 or 3, characterized in that, The number of air inlet pipes ranges from 1 to 5, and the number of air outlet pipes ranges from 1 to 5.

5. The preservation device according to claim 1, characterized in that, The storage container is provided with a transition cavity, the air outlet pipe is connected to the transition cavity, and the turbulence device blows air into the transition cavity.

6. The preservation device according to claim 5, characterized in that, The preservation device includes a mounting cover connected to the storage container to define a accommodating space. The accommodating space is provided with a partition that divides the accommodating space into a transition cavity and an installation cavity. The turbulence device is provided in the installation cavity, and the partition is provided with a communication port connecting the transition cavity and the installation cavity.

7. The preservation device according to claim 6, characterized in that, The partition is provided with an air guide protrusion surrounding the communication port, and the air guide protrusion abuts against the air outlet of the turbulence device.

8. The preservation device according to claim 6, characterized in that, The inner wall of the storage container is provided with an annular protrusion, and the mounting cover is fitted onto the annular protrusion to form the accommodating space.

9. The preservation device according to claim 1, characterized in that, The air outlet end of the turbulence device is connected to the air outlet pipe.

10. The preservation device according to claim 1, characterized in that, The controlled atmosphere device is an oxygen removal module.

11. The preservation device according to claim 1 or 10, characterized in that, When the turbulence device is not working and the controlled atmosphere device is working, the oxygen concentration in the storage space is less than the oxygen concentration outside the storage container, and the difference is greater than or equal to 1% under equilibrium conditions.

12. A refrigerator, characterized in that, Includes the preservation device according to any one of claims 1 to 11.

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