Air extraction device and refrigeration appliance

Abstract

The application discloses a kind of fresh-keeping device and refrigeration equipment, fresh-keeping device includes fresh-keeping room, be set on the air extraction component of the fresh-keeping room;The air extraction component includes: working cavity;Rotary mechanism, rotatably be set in the working cavity, and working cavity is separated into the air extraction cavity that is communicated with fresh-keeping room by air extraction hole and the exhaust cavity that is communicated with the outside of fresh-keeping room by exhaust hole;Gas regulation film, be set between the air extraction hole and the fresh-keeping room;Wherein, the rotary mechanism is set as, when carrying out rotation the volume of one of the air extraction cavity and exhaust cavity increases, the volume of another is reduced accordingly, and when rotary mechanism rotates to certain position, so that air extraction cavity and exhaust cavity at least partial area are switched over.The application is with simple structure, and air extraction device with low energy consumption effectively reduces the oxygen in fresh-keeping space, improves fresh-keeping effect.

Description

Technical Field

[0001] This invention relates to the field of refrigeration equipment preservation technology, and in particular to an air extraction device and refrigeration equipment. Background Technology

[0002] As people's living standards and purchasing power improve, their requirements for food preservation are also increasing. Existing refrigeration equipment mainly uses low temperatures to inhibit microbial activity, but the oxygen concentration inside the drawer is similar to that outside, leading to accelerated respiration of fruits and vegetables and limited preservation effect.

[0003] Some technologies employ modified atmosphere storage, such as oxygen-controlled membranes and vacuum pumps to reduce oxygen levels by controlling various gaseous environmental parameters in the storage environment, thereby inhibiting the respiration of fruits and vegetables and slowing down the metabolic process. However, these technologies suffer from problems such as complex structure, high energy consumption, and unstable gas concentration. Summary of the Invention

[0004] The purpose of this invention is to provide a preservation device that effectively reduces oxygen in the preservation space and improves the preservation effect through a simple and energy-efficient air extraction structure.

[0005] To achieve the above objectives, the present invention provides a preservation device, including a preservation chamber and an air extraction assembly disposed on the preservation chamber; the air extraction assembly includes:

[0006] Working chamber;

[0007] A rotating mechanism is rotatably disposed within the working chamber and divides the working chamber into an air extraction chamber that connects to the fresh-keeping chamber through an air extraction hole and an exhaust chamber that connects to the outside of the fresh-keeping chamber through an exhaust hole.

[0008] A modified atmosphere membrane is disposed between the air extraction hole and the preservation chamber;

[0009] The rotating mechanism is configured such that when it rotates, the volume of one of the suction chamber and the exhaust chamber increases while the volume of the other decreases accordingly, and when the rotating mechanism rotates to a certain position, at least a portion of the suction chamber and the exhaust chamber are switched.

[0010] In one embodiment of the present invention, when at least a portion of the suction chamber and exhaust chamber regions are switched, at least one of the suction port and exhaust port is shielded by the rotating mechanism; when both the suction port and exhaust port are exposed in the working chamber, the suction port and exhaust port are located on both sides of the rotating mechanism.

[0011] In one embodiment of the present invention, the rotating mechanism includes a rotating component and a sealing component that cooperates with the rotating component to isolate the air extraction port and the air exhaust port; the rotating component includes a turntable rotatably connected to the bottom of the working chamber and a rotating shaft vertically connected to the top of the turntable, the turntable rotating around the rotating shaft.

[0012] In one embodiment of the present invention, the air extraction assembly further includes a drive assembly for driving the rotating mechanism to rotate. A gear is fixedly connected to the upper end of the rotating shaft. The drive assembly includes a helical rotor that cooperates with the gear and a motor that drives the helical rotor to rotate.

[0013] In one embodiment of the present invention, the sealing element includes an elastic element disposed inside the rotating element and sealing blocks disposed at both ends of the elastic element. When the turntable rotates around the rotating shaft, the end of the sealing block away from the elastic element is in close contact with the inner wall of the working cavity.

[0014] In one embodiment of the present invention, the turntable includes slots arranged symmetrically in the radial direction and through holes communicating with the slots; the elastic element passes through the through hole, and the sealing block is slidably connected in the slots.

[0015] In one embodiment of the present invention, both the working chamber and the turntable are circular structures, the rotating shaft is located at the center point of the turntable, the turntable is connected to one end of the working chamber near the edge and is in sealed contact with the inner wall of that end, and the air extraction port and the air exhaust port are respectively arranged on both sides of the turntable.

[0016] In one embodiment of the present invention, the sealing element includes an elastic element with one end fixed to the side wall of the working cavity and a sealing block fixed to the other end of the elastic element, wherein the end of the sealing block away from the elastic element is in sealing contact with the side wall of the turntable.

[0017] In one embodiment of the present invention, the working chamber includes a circular cavity and a receiving cavity protruding outward from one end of the circular cavity. The sealing member is slidably connected in the receiving cavity and translates in a direction toward or away from the circular cavity when the rotating member rotates. The air extraction port and the air exhaust port are distributed on the lateral sides of the sealing member.

[0018] In one embodiment of the present invention, the rotating shaft is connected to one end of the turntable near the edge and located at the center of the circular cavity. When the turntable rotates around the rotating shaft, the side wall of the end away from the rotating shaft rotates and abuts against the inner side wall of the circular cavity.

[0019] To achieve the above objectives, the present invention provides a refrigeration device having the above-described preservation device.

[0020] The beneficial effects of this invention are as follows: the rotating mechanism dynamically divides the working chamber into an extraction chamber and an exhaust chamber with opposite volume changes during rotation, thereby generating a pressure difference to achieve efficient gas extraction or discharge. When the rotating mechanism rotates to a certain position, at least a portion of the extraction chamber and exhaust chamber switch to form a cyclic extraction and discharge mechanism. The preservation device has a simple structure and low energy consumption. Through the cooperation of the rotating mechanism and the modified atmosphere membrane, the oxygen concentration in the preservation chamber is actively regulated, eliminating the need for an external gas source or vacuum device, thus significantly improving preservation efficiency. Attached Figure Description

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

[0022] Figure 2 yes Figure 1 A schematic diagram of the air extraction component of the medium-temperature preservation device inside the preservation chamber;

[0023] Figure 3 yes Figure 1 A schematic diagram of the working chamber of the central air extraction component when it is open;

[0024] Figure 4 yes Figure 1 A schematic diagram of the exploded structure of the medium-temperature preservation device;

[0025] Figure 5 yes Figure 3 A schematic diagram showing the connection between the rotating mechanism and the working chamber;

[0026] Figure 6 yes Figure 1 A schematic diagram of the working chamber of the central air extraction component after it is closed;

[0027] Figure 7 yes Figure 3 A schematic diagram of the rotating mechanism in the first position;

[0028] Figure 8 yes Figure 3 A schematic diagram of the rotating mechanism in the second position;

[0029] Figure 9 yes Figure 3 Schematic diagram of the rotating component;

[0030] Figure 10 This is a three-dimensional structural schematic diagram of a food preservation device according to another embodiment of the present invention;

[0031] Figure 11 yes Figure 10 A schematic diagram of the working chamber of the medium-temperature preservation device when it is open;

[0032] Figure 12 yes Figure 10 A schematic diagram of the exploded structure of the medium-temperature preservation device;

[0033] Figure 13 yes Figure 11 Schematic diagram of the rotating mechanism;

[0034] Figure 14 yes Figure 11 A schematic diagram of the rotating mechanism in the first position;

[0035] Figure 15 yes Figure 11 A schematic diagram of the rotating mechanism in the second position;

[0036] Figure 16 yes Figure 11 A schematic diagram showing the connection between the rotating mechanism and the working chamber. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] It should be understood that, unless otherwise expressly specified and limited, in this application, the terms "upper," "lower," "front," "rear," "left," "right," etc., indicate the orientation or positional relationship based on the illustrations and are only for the convenience of description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed or operated in a specific orientation.

[0039] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, at least two.

[0040] In this invention, unless otherwise explicitly specified and limited, the terms “set up,” “connected,” “linked,” “fixed,” etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part.

[0041] This invention provides a food preservation device 100, as shown in the figure. Figures 1 to 4 The preservation device 100 includes a preservation chamber 20 and an air extraction assembly 10 disposed on the preservation chamber 20.

[0042] The air extraction assembly 10 includes a working chamber 1, a rotating mechanism 2, and a modified atmosphere membrane 3. The rotating mechanism 2 is rotatably disposed within the working chamber 1 and divides the working chamber 1 into an air extraction chamber 12 connected to the preservation chamber 20 via an air extraction port 11 and an exhaust chamber 14 connected to the outside of the preservation chamber 20 via an exhaust port 13. Isolating the air extraction port 11 and the exhaust port 13 ensures airtightness and prevents gas cross-flow, thus avoiding any impact on the air extraction or exhaust process in the air extraction chamber 12 and the exhaust chamber 14.

[0043] The rotating mechanism 2 is configured such that when it rotates, the volume of one of the suction chamber 12 and the exhaust chamber 14 increases and the volume of the other decreases accordingly, and when the rotating mechanism 2 rotates to a certain position, at least a portion of the suction chamber 12 and the exhaust chamber 14 are switched.

[0044] During rotation, the rotating mechanism 2 dynamically divides the space outside the working chamber 1 into an extraction chamber 12 and an exhaust chamber 14. By rotating, the volume of the extraction chamber 12 and the exhaust chamber 14 is changed, so that the volumes of the two change in opposite directions. When the volume of one increases, the volume of the other decreases accordingly. Therefore, a pressure difference will be generated in the extraction chamber 12 and the exhaust chamber 14 during the volume change, so as to achieve efficient gas extraction or discharge.

[0045] By controlling the rotation direction of the rotating mechanism 2, the gas in the freshness compartment 20 can be selectively extracted and discharged to the outside of the freshness compartment 20, or the gas outside the freshness compartment 20 can be selectively introduced into the freshness compartment 20.

[0046] This application mainly uses the extraction of oxygen from the preservation chamber 20 as an example for illustration. The modified atmosphere membrane 3 is disposed between the extraction port 11 and the preservation chamber 20. When the modified atmosphere membrane 3 is set as an oxygen-permeable membrane that only allows oxygen to pass through, the extraction component 10 can selectively separate the oxygen in the preservation chamber 20 and retain nitrogen, effectively reducing the oxygen concentration in the preservation space and enhancing the preservation effect.

[0047] Of course, the preservation device 100 described in this invention can also be used to introduce nitrogen from outside the preservation chamber 20 into the preservation chamber 20 by combining the rotating mechanism 2 with a nitrogen-permeable membrane that only allows nitrogen to pass through, so as to increase the nitrogen concentration in the preservation chamber 20 and thus relatively reduce the oxygen concentration.

[0048] During the rotation of the rotating mechanism 2 in this embodiment, the volume of the suction chamber 12 increases, creating a pressure difference between the inside and outside of the oxygen-permeable membrane 3, thereby drawing oxygen out of the freshness compartment 20. This allows the oxygen in the freshness compartment 20 to be drawn into the suction chamber 12 through the oxygen-permeable membrane 3. At the same time, the volume of the exhaust chamber 14 decreases, creating a pressure difference between the inside and outside of the exhaust port 13, allowing the oxygen in the exhaust chamber 14 to be discharged to the outside of the freshness compartment 20 through the exhaust port 13.

[0049] When the rotating mechanism 2 rotates to a certain position, a portion of the suction chamber 12 is switched to the exhaust chamber 14, converting the oxygen extracted from the suction chamber 12 into the exhaust chamber 14, and then discharging it outside the preservation chamber 20 as the volume of the exhaust chamber 14 decreases. This forms a gas circulation and exhaust mechanism that is simple and efficient.

[0050] The preservation device 100 has a simple structure and low energy consumption. Through the cooperation of the rotating mechanism 2 and the modified atmosphere membrane 3, it actively regulates the oxygen concentration in the preservation chamber 20, eliminating the need for an external gas source or vacuum device, thus significantly improving preservation efficiency.

[0051] When at least a portion of the regions of the extraction chamber 12 and the exhaust chamber 14 are switched, at least one of the extraction port 11 and the exhaust port 13 is shielded by the rotating mechanism 2. The rotating mechanism 2 achieves chamber switching by shielding either the extraction port 11 or the exhaust port 13, preventing direct communication between the extraction port 11 and the exhaust port 13 within the working chamber 1 during switching, thus avoiding unintended gas flow. This prevents gas backflow, ensures a single extraction / exhaust direction, and improves system stability.

[0052] When both the extraction port 11 and the exhaust port 13 are exposed in the working chamber 1, the extraction port 11 and the exhaust port 13 are located on both sides of the rotating mechanism 2. The dynamic sealing design of the rotating mechanism 2 can help to separate the extraction port 11 and the exhaust port 13, ensuring that the gas in the extraction chamber 12 and the exhaust chamber 14 flows in one direction.

[0053] Specifically, such as Figure 4 As shown, in this embodiment, the working chamber 1 is composed of an installation groove 15 formed by the inward recess of the preservation chamber 20 and a sealing cover 16 that cooperates with the installation groove 15.

[0054] The rotating mechanism 2 is housed in the mounting groove 15, which, together with the sealing cover 16, provides a relatively enclosed space for the rotating mechanism 2 to circulate and exhaust gas. The sealing cover 16 fits tightly against the opening of the mounting groove 15, ensuring that the gas in the working chamber 1 does not leak during the rotation of the rotating mechanism 2, thus ensuring that oxygen is stably extracted and discharged from the preservation chamber 20. Simultaneously, this design of the working chamber 1 makes the entire preservation device 100 more compact and easier to install.

[0055] Of course, in some other embodiments, the working chamber 1 may also be composed of an independent box installed on the preservation chamber 20. The independent box may be detachable, which makes it convenient for users to replace or maintain it according to actual needs, making the maintenance of the rotating mechanism 2 and its related components more convenient and improving the availability and durability of the entire system.

[0056] Reference Figure 3 and Figure 4The rotating mechanism 2 includes a rotating component 21 and a sealing component 22 that cooperates with the rotating component 21 to isolate the air extraction port 11 and the air exhaust port 13. The rotating component 21 includes a turntable 211 rotatably connected to the bottom of the working chamber 1 and a rotating shaft 212 vertically connected to the top of the turntable 211. The turntable 211 rotates around the rotating shaft 212.

[0057] To achieve the rotational connection between the turntable 211 and the working chamber 1, the present invention provides two specific embodiments, such as... Figure 5 In the embodiment shown, a circular hole 152 is provided on the bottom wall of the working cavity 1. The turntable 211 is provided with a connecting block 2112 that fits the shape of the circular hole 152. When the turntable 211 is installed close to the bottom of the working cavity 1, the connecting block 2112 is inserted into the circular hole 152 and rotatably connected to the circular hole 152.

[0058] In such Figure 16 In the embodiment shown, the working cavity 1 has a limiting protrusion 151 protruding outward from the bottom wall. The limiting protrusion 151 is circular or annular. The bottom of the turntable 211 is provided with a first groove 2111 that matches the shape of the limiting protrusion 151. The turntable 211 is sleeved on the limiting protrusion 151 through the first groove 2111 and is rotatably connected to the limiting protrusion 151.

[0059] Of course, in some other embodiments, the bottom of the working cavity 1 may also be provided with an annular slide rail, and the bottom of the turntable 211 is provided with an annular slide groove. The turntable 211 achieves rotational connection with the working cavity 1 through the cooperation of the annular slide groove and the annular slide rail.

[0060] The rotational connection between the turntable 211 and the working chamber 1 ensures that the rotating mechanism 2 can work smoothly and reliably, thereby achieving stable extraction and discharge of oxygen in the preservation chamber 20.

[0061] The turntable 211 is disposed in the working chamber 1, and its two axial sides are tightly fitted to the top and bottom walls of the working chamber 1, respectively. That is, its thickness in the axial thickness direction matches the depth of the working chamber 1, so that the turntable 211 can be firmly installed in the working chamber 1, which is not easy to shake or misalign, and ensures the stability of the turntable 211 during rotation. This avoids gaps between the turntable 211 and the working chamber 1, which could lead to gas leakage during extraction and discharge.

[0062] like Figure 6As shown, the vacuum assembly 10 may further include a drive assembly 4 for driving the rotating mechanism 2 to rotate. A gear 41 is fixedly connected to the upper end of the rotating shaft 212. The drive assembly 4 includes a helical rod 42 that cooperates with the gear 41, and a motor 43 for driving the helical rod 42 to rotate.

[0063] When the motor 43 starts, the helical rod 42 rotates accordingly. Due to the close cooperation between the helical rod 42 and the gear 41, the gear 41 will be driven by the helical rod 42 and start to rotate, thereby driving the rotation of the shaft 212 and realizing the driving of the rotating mechanism 2.

[0064] By precisely controlling the speed and direction of the motor 43, the rotational speed and direction of the rotating mechanism 2 can be flexibly adjusted, thereby ensuring that the extraction and discharge of gas in the preservation chamber 20 meets the preset requirements. This driving method is not only simple in structure and easy to implement, but also has high stability and reliability.

[0065] In such Figures 1 to 9 In one specific embodiment shown, the sealing element 22 includes an elastic element 221 disposed inside the rotating element 21 and sealing blocks 222 disposed at both ends of the elastic element 221. When the turntable 211 rotates around the rotating shaft 212, the end of the sealing block 222 away from the elastic element 221 is in close contact with the inner wall of the working cavity 1.

[0066] In this embodiment, the elastic element 221 is a helical spring with good elasticity and restoring force. It can abut against the side wall of the working chamber 1 and maintain a compressed state. During the rotation of the turntable 211, it adaptively adjusts the position of the sealing block 222 to the slight gap changes generated between the sealing block 222 and the inner side wall of the working chamber 1, ensuring that the sealing block 222 is always in close contact with the inner side wall of the working chamber 1, effectively preventing oxygen leakage.

[0067] The sealing block 222 can be made of wear-resistant and corrosion-resistant materials to increase its service life and sealing effect. The shape of the end of the sealing block 222 matches the contour of the inner wall of the working chamber 1, further enhancing the tightness of the seal and effectively avoiding oxygen leakage caused by poor sealing, thus ensuring that the oxygen environment of the preservation chamber 20 meets the storage requirements.

[0068] The turntable 211 includes radially symmetrical slots 2113 and through holes 2114 communicating with the slots 2113; the elastic element 221 passes through the through hole 2114, and the sealing block 222 is slidably connected in the slots 2113.

[0069] The elastic element 221 can apply stable pressure to the sealing block 222 through the through hole 2114, ensuring that the sealing block 222 is always in close contact with the inner wall of the working chamber 1. At the same time, the design of the slot 2113 allows the sealing block 222 to slide within the slot 2113 to adapt to the slight changes in the gap between the turntable 211 and the inner wall of the working chamber 1, further enhancing the flexibility and reliability of the seal.

[0070] Both the working chamber 1 and the turntable 211 are circular structures. The rotating shaft 212 is located at the center point of the turntable 211. The turntable 211 is connected to one end of the working chamber 1 near the edge and is in sealed contact with the inner wall of that end. The air extraction port and the air exhaust port are respectively located on both sides of the turntable 211.

[0071] This configuration allows the turntable 211 to rotate fixedly at one end of the working chamber 1. By driving the sealing blocks 222 on both sides to abut against the side wall of the working chamber 1 and perform circumferential motion, the space in the working chamber 1 other than the turntable 211 is dynamically divided into an air extraction chamber 12 and an exhaust chamber 14, thereby realizing the circulation and extraction of oxygen.

[0072] Of course, in some alternative embodiments, the rotating mechanism 2 can also be adapted to various cavity shapes, such as making the working cavity 1 square, elliptical or other shapes. The turntable 211 is fixed to one end of the working cavity 1 near the edge and abuts against the side wall of that end. The sealing member 22 can elastically stretch and press against the inner side wall of the working cavity 1 during rotation, which can also achieve the above effect. These modified structures will not be described in detail here.

[0073] The following will use the extraction of oxygen from the preservation chamber 20 as an example to describe the working process of the preservation device 100 described in this embodiment. The modified atmosphere membrane 3 is set as an oxygen-permeable membrane, which is used to selectively separate oxygen and only allow oxygen in the preservation chamber 20 to pass through. First, the motor 43 located outside the working chamber 1 is started to control the rotation of the spiral rod 42. The gear 41 that cooperates with the spiral rod 42 drives the rotating shaft 212 and the turntable 211 to rotate clockwise in the working chamber 1.

[0074] The elastic element 221 of the sealing element 22 is always kept in a compressed state, and the sealing blocks 222 at both ends slide in the slots 2113 of the turntable 211 under the drive of its compression force. The ends of the sealing blocks 222 are always in close contact with the inner wall of the working chamber 1, ensuring the sealed separation of the air extraction hole 11 and the exhaust hole 13 during rotation.

[0075] The rotating mechanism 2 operates freely. Figure 7 The first position is transformed to Figure 8During the second phase, the volume of the suction chamber 12 increases, creating a pressure difference between the inside and outside of the oxygen-permeable membrane, thereby drawing oxygen out of the freshness compartment 20. This allows oxygen in the freshness compartment 20 to be drawn into the suction chamber 12 through the oxygen-permeable membrane. Simultaneously, the volume of the exhaust chamber 14 decreases, creating a pressure difference between the inside and outside of the exhaust port 13. Oxygen in the exhaust chamber 14 is then discharged to the outside of the freshness compartment 20 through the exhaust port 13.

[0076] As the rotating mechanism 2 continues to rotate clockwise, from... Figure 8 The second position transformation back to Figure 7 During the first position process, the sealing block 222 near the air extraction port 11 will rotate past the air extraction port 11. When the sealing block 222 blocks the air extraction port 11, most of the space of the originally large air extraction chamber 12 is switched to the space of the exhaust chamber 14, and the oxygen extracted in the air extraction chamber 12 is converted into the oxygen contained in the exhaust chamber 14.

[0077] After the sealing block 222 near the air extraction hole 11 rotates past the air extraction hole 11, the volume of the air extraction chamber 12 decreases sharply and then expands again as the rotating mechanism 2 rotates, while the volume of the exhaust chamber 14 increases sharply and then decreases again as the rotating mechanism 2 rotates, thus forming a circulating extraction and exhaust mechanism to continuously exhaust oxygen in the freshness preservation chamber 20 to the outside of the freshness preservation chamber 20.

[0078] In such Figures 10 to 16 In another specific embodiment shown, the sealing element 22 includes an elastic element 221 fixed at one end to the side wall of the working chamber 1 and a sealing block 222 fixed at the other end of the elastic element 221. The end of the sealing block 222 away from the elastic element 221 is in sealing contact with the side wall of the turntable 211.

[0079] The elastic element 221 allows the sealing block 222 to move along with the rotation of the turntable 211, adaptively adjusting its position to ensure a constant seal between the sealing block 222 and the side wall of the turntable 211. This effectively prevents gas leakage between the sealing block 222 and the turntable 211, ensuring gas isolation between the extraction chamber 12 and the exhaust chamber 14, and enabling the extraction and exhaust mechanism to operate normally.

[0080] The sealing block 222 can be made of wear-resistant and corrosion-resistant materials to increase its service life and sealing effect. The shape of the end of the sealing block 222 matches the side wall of the turntable 211, further enhancing the tightness of the seal.

[0081] The working chamber 1 includes a circular cavity 17 and a receiving cavity 18 protruding outward from one end of the circular cavity 17. The sealing member 22 is slidably connected in the receiving cavity 18. When the rotating member 21 rotates, it translates in a direction toward or away from the circular cavity 17. The air intake port and exhaust port are distributed on both sides of the sealing member 22. The receiving cavity 18 provides a certain guiding and supporting function for the sealing member 22, maintaining the continuity and stability of the extraction and exhaust mechanism.

[0082] The rotating shaft 212 is connected to one end of the turntable 211 near the edge and is located at the center of the circular cavity 17. When the turntable 211 rotates around the rotating shaft 212, the side wall of the end away from the rotating shaft 212 rotates and abuts against the inner side wall of the circular cavity 17.

[0083] This configuration allows one end of the turntable 211 to be fixed at the center of the working chamber 1, while the other end of the turntable 211 abuts against the side wall of the working chamber 1 and moves in a circular motion. The sealing block 222 moves adaptively with the contour of the side wall of the turntable 211 and dynamically seals against the turntable 211, thereby dynamically dividing the space in the working chamber 1, excluding the turntable 211, into an extraction chamber 12 and an exhaust chamber 14, thus realizing the circulation and extraction of oxygen.

[0084] The following will use the extraction of oxygen from the preservation chamber 20 as an example to describe the working process of the preservation device 100 described in this embodiment. The modified atmosphere membrane 3 is set as an oxygen-permeable membrane, which is used to selectively separate oxygen and only allow oxygen inside the preservation chamber 20 to pass through. First, the motor 43 located outside the working chamber 1 is started to control the rotation of the spiral rod 42. The gear 41 that cooperates with the spiral rod 42 drives the rotating shaft 212 and the turntable 211 to rotate clockwise in the working chamber 1.

[0085] The elastic element 221 of the seal 22 is always kept in a compressed state, and the sealing block 222 slides in the accommodating cavity under its compressive force. The end of the sealing block 222 is always in close contact with the side wall of the turntable 211, ensuring the sealed separation of the air extraction hole 11 and the exhaust hole 13 during rotation.

[0086] The rotating mechanism 2 operates freely. Figure 14 The first position is transformed to Figure 15 During the second phase, the volume of the suction chamber 12 increases, creating a pressure difference between the inside and outside of the oxygen-permeable membrane, thereby drawing oxygen out of the freshness compartment 20. This allows oxygen in the freshness compartment 20 to be drawn into the suction chamber 12 through the oxygen-permeable membrane. Simultaneously, the volume of the exhaust chamber 14 decreases, creating a pressure difference between the inside and outside of the exhaust port 13. Oxygen in the exhaust chamber 14 is then discharged to the outside of the freshness compartment 20 through the exhaust port 13.

[0087] As the rotating mechanism 2 continues to rotate clockwise, from... Figure 15The second position transformation back to Figure 14 During the first position process, the turntable 211 rotates past the air extraction hole 11. When the turntable 211 blocks the air extraction hole 11, most of the space of the originally large air extraction chamber 12 is switched to the space of the exhaust chamber 14, and the oxygen extracted in the air extraction chamber 12 is converted into the exhaust chamber 14.

[0088] After the turntable 211 rotates past the air extraction hole 11, the volume of the air extraction chamber 12 decreases sharply and then expands again as the rotating mechanism 2 rotates, while the volume of the exhaust chamber 14 increases sharply and then decreases again as the rotating mechanism 2 rotates, thus forming a circulating extraction and exhaust mechanism to continuously exhaust oxygen in the freshness preservation chamber 20 to the outside of the freshness preservation chamber 20.

[0089] In addition, the present invention also provides a refrigeration device, including the preservation device 100 as described in any of the above embodiments, and thus has all the beneficial effects of the preservation device 100 in any of the above embodiments, which will not be repeated here.

[0090] It should be noted that the preservation device 100 of the present invention is not limited to use in refrigeration equipment, but can also be used in other storage devices suitable for long-term preservation. For example, it can be used in commercial refrigerated cabinets and pharmaceutical cold chain equipment for storing fruits, vegetables, fresh produce, and pharmaceuticals.

[0091] In summary, the preservation device provided by this invention dynamically divides the working chamber into an extraction chamber and an exhaust chamber with opposite volume changes during the rotation of the rotating mechanism, thereby generating a pressure difference to achieve efficient gas extraction or discharge. When the rotating mechanism rotates to a certain position, at least a portion of the extraction chamber and the exhaust chamber switch to form a cyclic extraction and discharge mechanism. The preservation device has a simple structure and low energy consumption. Through the cooperation of the rotating mechanism and the controlled atmosphere membrane, it actively regulates the oxygen concentration in the preservation chamber, eliminating the need for an external gas source or vacuum device, thus significantly improving preservation efficiency.

[0092] In the embodiments provided by the present invention, it should be understood that the above-described implementation of the structure is merely illustrative. For example, the division of the modules is merely a logical functional division. In actual implementation, there may be other division methods. For example, multiple modules or components may be combined or integrated into another device, or some features may be ignored or not executed.

[0093] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A food preservation device, characterized in that, Includes a fresh-keeping compartment (20) and an air extraction assembly (10) disposed on the fresh-keeping compartment (20); the air extraction assembly (10) includes: Working chamber (1); The rotating mechanism (2) is rotatably disposed in the working chamber (1) and divides the working chamber (1) into an air extraction chamber (12) that connects to the freshness chamber (20) through an air extraction hole (11) and an exhaust chamber (14) that connects to the outside of the freshness chamber (20) through an exhaust hole (13). A modified atmosphere membrane (3) is disposed between the air extraction hole (11) and the preservation chamber (20); The rotating mechanism (2) is configured such that when it rotates, the volume of one of the suction chamber (12) and the exhaust chamber (14) increases and the volume of the other decreases accordingly, and when the rotating mechanism (2) rotates to a certain position, at least a portion of the suction chamber (12) and the exhaust chamber (14) are switched.

2. The preservation device according to claim 1, characterized in that, When at least a portion of the regions of the suction chamber (12) and the exhaust chamber (14) are switched, at least one of the suction port (11) and the exhaust port (13) is shielded by the rotating mechanism (2); when both the suction port (11) and the exhaust port (13) are exposed to the working chamber (1), the suction port (11) and the exhaust port (13) are located on both sides of the rotating mechanism (2).

3. The preservation device according to claim 2, characterized in that, The rotating mechanism (2) includes a rotating component (21) and a sealing component (22) that cooperates with the rotating component (21) to isolate the air extraction hole (11) and the exhaust hole (13); the rotating component (21) includes a turntable (211) rotatably connected to the bottom of the working chamber (1) and a rotating shaft (212) vertically connected to the top of the turntable (211), and the turntable (211) rotates around the rotating shaft (212).

4. The preservation device according to claim 3, characterized in that, The air extraction assembly (10) further includes a drive assembly (4) for driving the rotation mechanism (2) to rotate. A gear (41) is fixedly connected to the upper end of the rotating shaft (212). The drive assembly (4) includes a helical rod (42) that cooperates with the gear (41) and a motor that drives the helical rod (42) to rotate.

5. The preservation device according to claim 3 or 4, characterized in that, The sealing element (22) includes a sealing element (221) disposed inside the rotating element (21) and sealing blocks (222) disposed at both ends of the sealing element (221). When the turntable (211) rotates around the rotating shaft (212), the end of the sealing block (222) away from the sealing element (221) is in close contact with the inner wall of the working chamber (1).

6. The preservation device according to claim 5, characterized in that, The turntable (211) includes a slot (2113) arranged symmetrically in the radial direction, and a through hole (2114) communicating with the slot (2113); the seal (221) passes through the through hole (2114), and the sealing block (222) is slidably connected in the slot (2113).

7. The preservation device according to claim 6, characterized in that, Both the working chamber (1) and the turntable (211) are circular structures. The rotating shaft (212) is located at the center of the turntable (211). The turntable (211) is connected to one end of the working chamber (1) near the edge and is in sealed contact with the inner wall of that end. The air extraction port and the air exhaust port are respectively located on both sides of the turntable (211).

8. The preservation device according to claim 3 or 4, characterized in that, The sealing element (22) includes a sealing element (221) fixed at one end to the side wall of the working chamber (1) and a sealing block (222) fixed at the other end of the sealing element (221). The end of the sealing block (222) away from the sealing element (221) is in sealing contact with the side wall of the turntable (211).

9. The preservation device according to claim 8, characterized in that, The working chamber (1) includes a circular cavity (17) and a receiving cavity (18) protruding outward from one end of the circular cavity (17). The sealing member (22) is slidably connected in the receiving cavity (18). When the rotating member (21) rotates, it translates in the direction toward or away from the circular cavity (17). The air extraction port and the air exhaust port are distributed on the lateral sides of the sealing member (22).

10. The preservation device according to claim 9, characterized in that, The rotating shaft (212) is connected to one end of the turntable (211) near the edge and is located at the center of the circular cavity (17). When the turntable (211) rotates around the rotating shaft (212), the side wall of the end away from the rotating shaft (212) rotates and abuts against the inner side wall of the circular cavity (17).

11. A refrigeration device, characterized in that, It has a preservation device as described in any one of claims 1 to 10.

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