Modified atmosphere fresh-keeping device and refrigerator

Abstract

The utility model discloses an air-conditioning fresh-keeping device and a refrigerator, and the air-conditioning fresh-keeping device comprises an air-conditioning fresh-keeping drawer which is used for storing articles needing fresh keeping; the gas conveying structure is communicated with the controlled atmosphere fresh-keeping drawer and used for conveying hydrogen to the controlled atmosphere fresh-keeping drawer, the gas conveying structure comprises a gas storage device, a gas outlet of the gas storage device is communicated with a gas inlet of the controlled atmosphere fresh-keeping drawer, and the gas storage device is used for storing the hydrogen and conveying the hydrogen to the controlled atmosphere fresh-keeping drawer; and the vacuum device is communicated with the gas storage device and is used for reducing the gas pressure in the gas storage device. According to the utility model, the problem that hydrogen is easy to escape when the hydrogen is used for controlled atmosphere fresh-keeping in the prior art is solved, so that the effective concentration maintaining time of the hydrogen in the hydrogen fresh-keeping space is prolonged, the fresh-keeping effect of fruits and vegetables is improved, and the fresh-keeping time of the fruits and vegetables is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of refrigerators, and in particular to a controlled atmosphere fresh-keeping device and a refrigerator. Background Art

[0002] Refrigerators are among the most commonly used household appliances, and their ability to preserve fresh food is their most important attribute. Currently, this functionality is primarily focused on controlling temperature and humidity, or by installing separate fruit and vegetable drawers within the refrigerator compartment and employing controlled atmosphere (CA) technology to enhance freshness and reduce food waste.

[0003] Controlled atmosphere preservation technology refers to the process of changing the composition and concentration of the gas in the storage environment in a closed environment, mainly increasing the CO2 content and reducing the O2 content, to prevent the deterioration of stored fruits and vegetables or delay the deterioration process, thereby achieving the purpose of preservation.

[0004] Currently, controlled atmosphere (CA) preservation technologies used in refrigerators include indiscriminately extracting a certain amount of air to create a negative pressure in a sealed space, or selectively extracting oxygen to reduce the oxygen content in a sealed space. Injecting hydrogen into a sealed environment is also a form of CA preservation. Hydrogen can selectively eliminate free radicals and increase the activity of antioxidant enzymes, thereby delaying the oxidation of fruits and vegetables and extending their shelf life. However, hydrogen molecules are small and easily dissipated.

[0005] With regard to the problem that hydrogen is easily dissipated when using hydrogen for controlled atmosphere preservation in related technologies, no effective solution has been proposed so far. Utility Model Content

[0006] The utility model provides a controlled atmosphere fresh-keeping device and a refrigerator, which at least solve the problem in the prior art that hydrogen easily escapes when controlled atmosphere fresh-keeping is performed using hydrogen.

[0007] In order to solve the above technical problems, according to one aspect of an embodiment of the present utility model, a controlled atmosphere preservation device is provided, including: a controlled atmosphere preservation drawer for storing items that need to be preserved; a gas delivery structure, connected to the controlled atmosphere preservation drawer, for delivering hydrogen to the controlled atmosphere preservation drawer; wherein the gas delivery structure includes: a gas storage device, the gas outlet of the gas storage device is connected to the gas inlet of the controlled atmosphere preservation drawer, for storing hydrogen and delivering hydrogen to the controlled atmosphere preservation drawer; a vacuum device, connected to the gas storage device, for reducing the air pressure in the gas storage device.

[0008] Furthermore, the vacuum device includes an oxygen filtering device, which is connected to the gas storage device and is used to filter out oxygen in the gas storage device.

[0009] Furthermore, the gas delivery structure also includes: a gas generating device for generating hydrogen; the gas delivery device is a three-layer structure, each layer is separated by a partition, the gas generating device is the bottom layer of the gas delivery device, the vacuum device is the middle layer of the gas delivery device, and the gas storage device is the top layer of the gas delivery device.

[0010] Furthermore, the gas generating device includes: an electrolysis device, used to generate hydrogen and oxygen by electrolyzing water; a hydrogen release port, arranged on a partition between the bottom layer of the gas conveying device and the middle layer of the gas conveying device, used to pass hydrogen into the vacuum device; wherein the hydrogen release port is arranged corresponding to the cathode of the electrolysis device; an oxygen release port, arranged on a partition between the bottom layer of the gas conveying device and the middle layer of the gas conveying device, used to pass oxygen into the vacuum device; wherein the oxygen release port is arranged corresponding to the anode of the electrolysis device.

[0011] Furthermore, the hydrogen release port is connected to the cathode of the electrolysis device through a first sleeve, the cathode of the electrolysis device is located in the first sleeve, and a gap is left between the bottom of the first sleeve and the bottom plate of the gas generating device; the oxygen release port is connected to the anode of the electrolysis device through a second sleeve, the anode of the electrolysis device is located in the second sleeve, and a gap is left between the bottom of the second sleeve and the bottom plate of the gas generating device; the gas generating device also includes: an electrolyte replenishing port, located on the side of the gas generating device, for replenishing the electrolyte; wherein the electrolyte replenishing port is provided with a switch assembly for controlling its switch.

[0012] Furthermore, the oxygen filtering device includes: an oxygen-enriched membrane located on a partition between the middle layer of the gas conveying device and the uppermost layer of the gas conveying device, for allowing oxygen in the gas storage device to pass through and enter the vacuum device.

[0013] Furthermore, the oxygen filtering device also includes: oxygen adsorption material, located in the vacuum device, used to adsorb oxygen in the vacuum device; an adsorbent replacement port, located on the side of the vacuum device, used to replace the oxygen adsorption material; wherein the adsorbent replacement port is provided with a switch component for controlling its switch.

[0014] Furthermore, the air outlet of the gas storage device is arranged on the side of the gas storage device, wherein there are one or more controlled atmosphere preservation drawers, and the air outlet of the gas storage device is arranged in a one-to-one correspondence with the controlled atmosphere preservation drawer; the gas storage device also includes a ventilation port, which is arranged on the side of the gas storage device, for replacing air for the gas storage device; wherein the air outlet of the gas storage device and the ventilation port of the gas storage device are both provided with a switch component for controlling their own switches.

[0015] Furthermore, it also includes: a controlled atmosphere preservation drawer shell, the controlled atmosphere preservation drawer is located in the controlled atmosphere preservation drawer shell, the controlled atmosphere preservation drawer is slidably connected to the controlled atmosphere preservation drawer shell, and the gas delivery structure is located on the rear side of the controlled atmosphere preservation drawer shell and is fixedly connected to the controlled atmosphere preservation drawer shell; wherein, a sealing gasket is provided at the opening of the controlled atmosphere preservation drawer shell, which is used to seal after the controlled atmosphere preservation drawer is pushed into the controlled atmosphere preservation drawer shell; the air inlet of the controlled atmosphere preservation drawer is provided on the controlled atmosphere preservation drawer shell, and is corresponding to the air outlet of the gas storage device; a sensor is located in the controlled atmosphere preservation drawer, and is used to detect the gas concentration in the controlled atmosphere preservation drawer, and the sensor includes at least an oxygen concentration sensor and a hydrogen concentration sensor.

[0016] According to one aspect of an embodiment of the present invention, a refrigerator is provided, comprising the above-mentioned controlled atmosphere preservation device.

[0017] This utility model provides a controlled atmosphere preservation solution. By providing a gas delivery structure to deliver hydrogen to the controlled atmosphere fresh-keeping drawer, hydrogen is used to slow oxidation of fruits and vegetables, thereby extending their shelf life. A vacuum device is also provided to reduce the pressure within the gas storage device, creating a negative pressure within the gas delivery structure. This prevents hydrogen from escaping, allowing the hydrogen in the hydrogen preservation space to maintain an effective concentration for a longer period of time, improving the fresh-keeping effect and duration of fruits and vegetables. This also reduces the loss of hydrogen or hydrogen-producing raw materials, thereby lowering the cost of the controlled atmosphere fresh-keeping drawer. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of an optional overall combination of a controlled atmosphere fresh-keeping device according to an embodiment of the present utility model;

[0019] Figure 2 This is an optional explosion diagram of the controlled atmosphere fresh-keeping device according to an embodiment of the utility model;

[0020] Figure 3 This is an optional schematic diagram of the internal structure of the gas delivery device according to an embodiment of the present utility model;

[0021] Figure 4This is an optional schematic diagram of a controlled atmosphere fresh-keeping drawer housing according to an embodiment of the present utility model;

[0022] Figure 5 This is an optional schematic diagram of a controlled atmosphere fresh-keeping drawer according to an embodiment of the present invention.

[0023] Description of reference numerals:

[0024] 01. Gas delivery device; 02. Air-conditioning drawer housing 1; 03. Air-conditioning drawer 1; 04. Air-conditioning drawer housing 2; 05. Air-conditioning drawer 2; 011. Rear cover; 012. Air outlet 1; 013. Air outlet 2; 014. Air exchange port 3; 015. Adsorbent replacement port; 016. Electrolyte replenishment port; 017. Oxygen-enriched membrane assembly; 018. Hydrogen release port; 019. Oxygen release port; 021. Air inlet 1; 031. Sensor 1; 041. Air inlet 2; 051. Sensor 2. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0026] The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The singular forms "a", "the" and "the" used in the embodiments of the present invention and the appended claims are also intended to include plural forms, unless the context clearly indicates otherwise, and "a plurality" generally includes at least two.

[0027] It should be understood that the term "and / or" as used herein is merely a description of the relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0028] It should be understood that although the terms "first," "second," "third," etc. may be used to describe controllers in embodiments of the present invention, these controllers should not be limited to these terms. These terms are merely used to distinguish controllers connected to different devices. For example, a first controller may also be referred to as a second controller, and similarly, a second controller may also be referred to as a first controller without departing from the scope of the present invention.

[0029] As used herein, the words "if" and "if" may be interpreted as "at the time of" or "when" or "in response to determining" or "in response to detecting," depending on the context. Similarly, the phrases "if it is determined" or "if (stated condition or event) is detected" may be interpreted as "when it is determined" or "in response to the determination" or "when detecting (stated condition or event)" or "in response to detecting (stated condition or event)," depending on the context.

[0030] It should also be noted that the terms "include," "comprises," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a product or device comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such product or device. In the absence of further limitations, an element defined by the phrase "comprises a..." does not exclude the presence of other identical elements in the product or device comprising the element.

[0031] Optional embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

[0032] Example 1

[0033] In the preferred embodiment 1 of the present invention, a controlled atmosphere fresh-keeping device is provided. Specifically, Figure 1 An optional overall combination diagram of the controlled atmosphere fresh-keeping device is shown. Figure 2 An optional explosion diagram of the modified atmosphere fresh-keeping device is shown, as shown in FIG. Figure 1 As shown, the atmosphere-controlled fresh-keeping device includes:

[0034] The atmosphere-controlled fresh-keeping drawer is used to store items that need to be kept fresh. The number of atmosphere-controlled fresh-keeping drawers can be set as one or more as needed to meet different preservation needs. Figure 1 Two are shown as an example, namely, 03 controlled atmosphere fresh-keeping drawer 1 and 05 controlled atmosphere fresh-keeping drawer 2. A controlled atmosphere fresh-keeping drawer shell is also provided outside the controlled atmosphere fresh-keeping drawer, that is, the controlled atmosphere fresh-keeping drawer is located in the controlled atmosphere fresh-keeping drawer shell, the controlled atmosphere fresh-keeping drawer is slidably connected to the controlled atmosphere fresh-keeping drawer shell, and the controlled atmosphere fresh-keeping drawer shell is correspondingly provided, such as Figure 1 As shown, it includes 02 controlled atmosphere fresh-keeping drawer shell 1 and 04 controlled atmosphere fresh-keeping drawer shell 2; 01 gas delivery device and 02 controlled atmosphere fresh-keeping drawer shell 1, 04 controlled atmosphere fresh-keeping drawer shell 2 are fixedly connected by screws;

[0035] The gas delivery structure is connected to the atmosphere-controlled fresh-keeping drawer and is used to deliver hydrogen to the atmosphere-controlled fresh-keeping drawer, wherein, Figure 1 As shown, the gas delivery structure is located at the rear side of the controlled atmosphere fresh-keeping drawer housing and is fixedly connected to the controlled atmosphere fresh-keeping drawer housing;

[0036] The gas delivery structure includes: a gas storage device, the gas outlet of the gas storage device is connected to the gas inlet of the controlled atmosphere preservation drawer, used to store hydrogen and deliver hydrogen to the controlled atmosphere preservation drawer; a vacuum device, connected to the gas storage device, used to reduce the air pressure in the gas storage device.

[0037] In the above embodiment, a controlled atmosphere preservation solution is provided. A gas delivery structure is provided to deliver hydrogen to the controlled atmosphere fresh-keeping drawer, where hydrogen is used to slow oxidation of fruits and vegetables, thereby extending their shelf life. A vacuum device is also provided to reduce the pressure within the gas storage device, creating a negative pressure within the gas delivery structure. This prevents hydrogen from escaping, allowing the hydrogen in the hydrogen fresh-keeping space to maintain an effective concentration for a longer period of time, thereby improving the fresh-keeping effect and duration of fruits and vegetables. This also reduces the loss of hydrogen or hydrogen-producing raw materials, thereby lowering the cost of the controlled atmosphere fresh-keeping drawer.

[0038] In the prior art, solutions for maintaining a certain degree of vacuum in a space mostly employ vacuum pumping devices. However, vacuum pumping devices are relatively complex and occupy a large area, making them unsuitable for refrigerators with high space requirements. Furthermore, they are also relatively expensive. In the present invention, the vacuum device includes an oxygen filter device, which is connected to the gas storage device and is used to filter out the oxygen within the gas storage device. The oxygen filter device removes the oxygen within the gas storage device, creating a negative pressure. Although it is not a complete vacuum, it can still prevent hydrogen from diffusing out of the gas storage device, thereby effectively reducing hydrogen loss. At the same time, the device occupies a smaller area, allowing refrigerators using this device to have more space for storing fresh items, thereby improving refrigerator performance.

[0039] The gas delivery structure of the present invention further comprises: a gas generating device for generating hydrogen; the gas generating device can continuously generate hydrogen to supply the gas-controlled fresh-keeping device for use.

[0040] Figure 3 The figure shows the internal structure of the gas delivery device in the present invention. Figure 3 As shown, the gas delivery device has a three-layer structure, each separated by partitions. The gas generation device is the bottom layer, the vacuum device is the middle layer, and the gas storage device is the top layer. The gas delivery device has a 011 rear cover, which is fixed to the rest of the gas delivery device with screws. Opening the 011 rear cover reveals the internal three-layer structure of the gas delivery device. This three-layer structure allows the gas generation device, vacuum device, and gas storage device to be compactly arranged. Considering the lightness and tendency of hydrogen to rise, the gas generation device is located at the bottom layer. The vacuum device is located in the middle layer, and the gas storage device is located at the top layer, connected to the fresh-keeping drawer. This rational and compact structure makes the gas delivery device easy to disassemble and use.

[0041] Optionally, the gas generating device includes: an electrolysis device for generating hydrogen and oxygen by electrolyzing water; the electrolyte can be water or alkaline water, and when the electrodes are energized, hydrogen is generated at the cathode and oxygen is generated at the anode. The cathode electrode can be an iron electrode, and the anode electrode can be a carbon electrode. The reaction occurring at the cathode is 4H2O+4e - =2H2+4OH - The reaction at the anode is 4OH - =O2+2H2O+4e - .

[0042] The generated gas enters the middle layer through hydrogen release port 018 and oxygen release port 019. The hydrogen release port, located on the partition between the bottom layer of the gas conveying device and the middle layer of the gas conveying device, is used to pass hydrogen into the vacuum device; the hydrogen release port is located corresponding to the cathode of the electrolysis device. The oxygen release port, located on the partition between the bottom layer of the gas conveying device and the middle layer of the gas conveying device, is used to pass oxygen into the vacuum device; the oxygen release port is located corresponding to the anode of the electrolysis device. The provision of these two release ports allows the gas generated by electrolysis to quickly enter the vacuum device and the gas storage device. When used in the controlled atmosphere fresh-keeping drawer, hydrogen can be quickly supplied or replenished, achieving better controlled atmosphere fresh-keeping effects.

[0043] Furthermore, the hydrogen release port is connected to the cathode of the electrolyzer via a first sleeve. The cathode of the electrolyzer is located within the first sleeve, with a gap between the bottom of the first sleeve and the bottom of the gas generator. The oxygen release port is connected to the anode of the electrolyzer via a second sleeve. The anode of the electrolyzer is located within the second sleeve, with a gap between the bottom of the second sleeve and the bottom of the gas generator. The separator has openings 018 for hydrogen release and 019 for oxygen release. The openings extend downward to surround the electrodes to form a sleeve. A gap is left between the sleeve and the bottom of the electrolytic layer, allowing electrolyte to enter the sleeve and electrolyze to generate hydrogen and oxygen. The gas generator also includes an electrolyte replenishment port located on the side of the gas generator for replenishing electrolyte. The electrolyte replenishment port is equipped with a switch assembly for controlling its opening and closing. The switch assembly controls the opening and closing of the electrolyte replenishment port to facilitate electrolyte replenishment, ensuring a continuous supply of hydrogen and maintaining the fresh-keeping effect of the controlled atmosphere fresh-keeping drawer.

[0044] Preferably, the oxygen filter device comprises: an oxygen-enriched membrane located on a partition between the middle layer of the gas delivery device and the uppermost layer of the gas delivery device, such as Figure 3As shown, it is used to allow oxygen within the gas storage device to permeate into the vacuum device. The 017 oxygen-enriching membrane assembly prevents oxygen released from the electrolyte layer into the middle layer from diffusing into the top layer. Instead, oxygen in the top layer permeates the 017 oxygen-enriching membrane assembly into the middle layer, where it is adsorbed by the oxygen adsorbent. The remaining gases in the top layer are nitrogen, hydrogen, and other gases. This creates a negative pressure within the gas storage device, ensuring optimal hydrogen storage.

[0045] In addition, the oxygen removal device also includes: oxygen adsorption material, located within the vacuum device, for absorbing oxygen within the vacuum device; an oxygen-enriched membrane, which addresses the issue of hydrogen escape and, in conjunction with the oxygen adsorption material, absorbs oxygen to ensure that excessive oxygen does not prevent the oxygen-enriched membrane from continuing to diffuse oxygen and thus creating negative pressure. After the entire gas delivery device, which allows for gas exchange with the outside, is closed, a sealed space is formed within the device. Simultaneously, the oxygen adsorbent in the intermediate layer reduces the amount of oxygen inside the device. As the oxygen is absorbed and consumed, a certain degree of vacuum naturally forms within the device.

[0046] The oxygen adsorbent material can be an oxygen-friendly adsorbent material such as a surface-modified molecular sieve. The oxygen adsorbent material can be solid or liquid and is well-packaged to prevent it from entering the electrolyte layer through the 018 hydrogen release port and the 019 oxygen release port, thereby contaminating the electrolyte. An adsorbent replacement port is also provided on the side of the vacuum device for replacing the oxygen adsorbent material. The oxygen adsorbent can be removed and replaced from the 015 adsorbent replacement port, and the adsorbed oxygen can be desorbed for further use. The adsorbent replacement port is equipped with a switch assembly for controlling its opening and closing. Controlling the opening and closing of the adsorbent replacement port through the switch assembly facilitates the replacement of the adsorbent, ensuring continuous oxygen absorption, ensuring a negative pressure in the controlled atmosphere fresh-keeping drawer, and improving the fresh-keeping effect.

[0047] Preferably, if Figure 3 As shown, the gas storage device includes: an outlet, disposed on a side of the gas storage device, through which a gas delivery structure communicates with a controlled atmosphere fresh-keeping drawer, delivering hydrogen to the drawer; wherein there are one or more controlled atmosphere fresh-keeping drawers, and the outlets are disposed in a one-to-one correspondence with the drawers; and a ventilation port, disposed on a side of the gas storage device, for replacing air in the gas storage device; wherein both the outlet and the ventilation port are provided with a switch assembly for controlling their own opening and closing. Controlling the outlet opening and closing through the switch assembly facilitates control of different fresh-keeping modes. In particular, when hydrogen fresh-keeping is used, the outlet opening is controlled by controlling the switch assembly, allowing hydrogen to enter the controlled atmosphere drawer, thereby maintaining the freshness of the items.

[0048] Furthermore, the controlled atmosphere preservation device further comprises: a controlled atmosphere preservation drawer housing, the controlled atmosphere preservation drawer being located within the controlled atmosphere preservation drawer housing, the controlled atmosphere preservation drawer being slidably connected to the controlled atmosphere preservation drawer housing, the gas delivery structure being located at the rear side of the controlled atmosphere preservation drawer housing and being fixedly connected to the controlled atmosphere preservation drawer housing; the air inlet of the controlled atmosphere preservation drawer being arranged on the controlled atmosphere preservation drawer housing and being arranged correspondingly to the air outlet; Figure 4 An optional schematic diagram of a controlled atmosphere fresh-keeping drawer housing is shown, as shown in FIG. Figure 4 As shown, the O2 controlled atmosphere fresh-keeping drawer housing 1 has an O21 air inlet 1, and the O4 controlled atmosphere fresh-keeping drawer housing 2 has an O41 air inlet 2. The O21 air inlet 1 and the O41 air inlet 2 are connected to the O12 air outlet 1 and the O13 air outlet 2, allowing the gas stored in the top layer of the gas delivery device to enter the O2 controlled atmosphere fresh-keeping drawer housing 1 and the O4 controlled atmosphere fresh-keeping drawer housing 2. This structure allows hydrogen from the gas delivery structure to enter the gas fresh-keeping drawer. At the same time, the controlled atmosphere fresh-keeping drawer housing and the controlled atmosphere fresh-keeping drawer are slidably connected, allowing the gas drawer to be pulled out of the controlled atmosphere fresh-keeping drawer housing for convenient placement of stored items. A sealing gasket is provided at the opening of the controlled atmosphere fresh-keeping drawer housing to seal the controlled atmosphere fresh-keeping drawer after it is pushed into the controlled atmosphere fresh-keeping drawer housing. After the O3 controlled atmosphere fresh-keeping drawer 1 is pushed into the O2 controlled atmosphere fresh-keeping drawer housing 1, it can be locked by the latch on the slide rail, thus achieving a certain degree of sealing between the two. The connection method of the 04 controlled atmosphere fresh-keeping drawer shell 2 and the 05 controlled atmosphere fresh-keeping drawer 2 is the same as that of the 02 controlled atmosphere fresh-keeping drawer shell 1 and the 03 controlled atmosphere fresh-keeping drawer 1. Through the sealed connection, the hydrogen can better play the preservation effect and extend the freshness time of the items.

[0049] Figure 5 An optional schematic diagram of a controlled atmosphere fresh-keeping drawer is shown, such as Figure 5 As shown, the controlled atmosphere fresh-keeping drawer is equipped with sensors for detecting the gas concentration within the drawer. The sensors include at least an oxygen concentration sensor and a hydrogen concentration sensor. These sensors detect the gas concentration within the drawer in real time, facilitating corresponding control of the controlled atmosphere fresh-keeping device to maintain the gas concentration within the drawer within the ideal range, thereby ensuring the fresh-keeping effect of the controlled atmosphere fresh-keeping drawer.

[0050] The storage space formed by the controlled atmosphere drawer housing and the controlled atmosphere drawer has three modes: normal refrigeration mode, normal controlled atmosphere mode, and hydrogen controlled atmosphere mode. Users can freely select the operating mode through the refrigerator program display panel.

[0051] When the normal refrigeration and fresh-keeping mode is selected, the air outlet 1 012 and the air outlet 2 013 are not opened. The air pressure and gas composition in the storage space formed by the shell and the inside of the drawer do not change.

[0052] When the normal controlled atmosphere preservation mode is selected, after the drawer is pushed into the shell and stuck, the 012 air outlet 1 and the 013 air outlet 2 are opened, and the gas delivery device and the storage space are connected so that the air pressure in the storage space also drops to form a certain vacuum degree. At the same time, when the drawer is opened to place items, the oxygen contained in the air entering the drawer will also be adsorbed by the oxygen adsorbent in the middle layer, thereby realizing vacuum oxygen reduction and controlled atmosphere preservation. After the sensor in the drawer detects that the oxygen concentration reaches the specified concentration, the 012 air outlet 1 and the 013 air outlet 2 are closed.

[0053] When the hydrogen controlled atmosphere preservation mode is selected, after the drawer is pushed into the shell and stuck, the 012 air outlet 1 and the 013 air outlet 2 are opened, the gas delivery device and the storage space are integrated, and electrolysis is started at the same time to produce hydrogen and oxygen. The oxygen is adsorbed by the oxygen adsorbent in the middle layer, and the hydrogen enters the top gas storage layer, and finally enters different storage spaces through the 012 air outlet 1 and the 013 air outlet 2, thereby realizing the controlled atmosphere preservation of vacuum oxygen reduction and hydrogen increase in the storage space.

[0054] After the sensor in the drawer detects that the concentration of hydrogen has reached the specified concentration, the gas outlet 1 012 and the gas outlet 2 013 are closed, and the ventilation port 3 014 is opened, and the excess hydrogen generated is released into the air, thereby reducing the risk of hydrogen enrichment in the device.

[0055] The air outlet 1 at 012 and the air outlet 2 at 013 can be opened and closed separately, that is, the fresh-keeping modes of the two storage spaces can be freely combined.

[0056] Depending on the items placed in the storage space, the oxygen concentration can be set between 5% and 10%. Depending on the items placed in the storage space, the hydrogen concentration can be set between 0.001% and 3%. Standard controlled atmosphere preservation mode is primarily suitable for preserving meats such as beef, pork, and chicken to reduce oxidation. Hydrogen controlled atmosphere preservation mode is primarily suitable for preserving fruits, vegetables, and flowers, as hydrogen inhibits aging.

[0057] Example 2

[0058] Based on the atmosphere-controlled fresh-keeping device provided in the above embodiment 1, a refrigerator is further provided in a preferred embodiment 2 of the present invention, including the atmosphere-controlled fresh-keeping device as described above. At the same time, it also includes an atmosphere-controlled fresh-keeping drawer, such as Figure 1 and Figure 2 shown.

[0059] In the above embodiment, a controlled atmosphere preservation solution is provided. A gas delivery structure is provided to deliver hydrogen to the controlled atmosphere fresh-keeping drawer, where hydrogen is used to slow oxidation of fruits and vegetables, thereby extending their shelf life. A vacuum device is also provided to reduce the pressure within the gas storage device, creating a negative pressure within the gas delivery structure. This prevents hydrogen from escaping, allowing the hydrogen in the hydrogen fresh-keeping space to maintain an effective concentration for a longer period of time, thereby improving the fresh-keeping effect and duration of fruits and vegetables. This also reduces the loss of hydrogen or hydrogen-producing raw materials, thereby lowering the cost of the controlled atmosphere fresh-keeping drawer.

[0060] In the above embodiment, a controlled atmosphere preservation solution is provided. A gas delivery structure is provided to deliver hydrogen to the controlled atmosphere fresh-keeping drawer, where hydrogen is used to slow oxidation of fruits and vegetables, thereby extending their shelf life. A vacuum device is also provided to reduce the pressure within the gas storage device, creating a negative pressure within the gas delivery structure. This prevents hydrogen from escaping, allowing the hydrogen in the hydrogen fresh-keeping space to maintain an effective concentration for a longer period of time, thereby improving the fresh-keeping effect and duration of fruits and vegetables. This also reduces the loss of hydrogen or hydrogen-producing raw materials, thereby lowering the cost of the controlled atmosphere fresh-keeping drawer.

[0061] Other embodiments of the present invention will readily occur to those skilled in the art after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only, with the true scope and spirit of the invention being indicated by the following claims.

[0062] It should be understood that the present invention is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A controlled atmosphere fresh-keeping device, characterized in that: include: Controlled atmosphere fresh-keeping drawers, used to store items that need to be kept fresh; A gas delivery device, connected to the controlled atmosphere fresh-keeping drawer, for delivering hydrogen to the controlled atmosphere fresh-keeping drawer; Wherein, the gas delivery device comprises: A gas storage device, the gas outlet of the gas storage device is connected to the gas inlet of the controlled atmosphere fresh-keeping drawer, and is used to store hydrogen and deliver hydrogen to the controlled atmosphere fresh-keeping drawer; A vacuum device is connected to the gas storage device and is used to reduce the gas pressure in the gas storage device.

2. The controlled atmosphere fresh-keeping device according to claim 1, characterized in that: The vacuum device includes an oxygen filtering device, which is communicated with the gas storage device and is used to filter out oxygen in the gas storage device.

3. The controlled atmosphere fresh-keeping device according to claim 2, characterized in that: The gas conveying device also includes: a gas generating device for generating hydrogen; the gas conveying device has a three-layer structure, each layer is separated by a partition, the gas generating device is the bottom layer of the gas conveying device, the vacuum device is the middle layer of the gas conveying device, and the gas storage device is the top layer of the gas conveying device.

4. The controlled atmosphere fresh-keeping device according to claim 3, characterized in that: The gas generating device comprises: an electrolysis device for generating hydrogen and oxygen by electrolyzing water; a hydrogen release port, provided on a partition between the bottom layer of the gas delivery device and the middle layer of the gas delivery device, for passing hydrogen into the vacuum device; wherein the hydrogen release port is provided corresponding to the cathode of the electrolysis device; An oxygen release port is provided on a partition between the bottom layer of the gas conveying device and the middle layer of the gas conveying device, and is used to pass oxygen into the vacuum device; wherein the oxygen release port is provided corresponding to the anode of the electrolysis device.

5. The controlled atmosphere fresh-keeping device according to claim 4, characterized in that: The hydrogen release port is connected to the cathode of the electrolysis device through a first sleeve, the cathode of the electrolysis device is located in the first sleeve, and a gap is left between the bottom of the first sleeve and the bottom plate of the gas generation device; The oxygen release port is connected to the anode of the electrolysis device through a second sleeve, the anode of the electrolysis device is located in the second sleeve, and a gap is left between the bottom of the second sleeve and the bottom plate of the gas generation device; The gas generating device further comprises: an electrolyte replenishing port, located on a side surface of the gas generating device, for replenishing the electrolyte; wherein the electrolyte replenishing port is provided with a switch component for controlling the opening and closing of the electrolyte replenishing port.

6. The controlled atmosphere fresh-keeping device according to claim 3, characterized in that: The oxygen filtering device comprises: The oxygen-enriched membrane is located on a partition between the middle layer of the gas conveying device and the uppermost layer of the gas conveying device, and is used to allow the oxygen in the gas storage device to pass through and enter the vacuum device.

7. The controlled atmosphere fresh-keeping device according to claim 6, characterized in that: The oxygen filtering device also includes: an oxygen adsorbing material, located in the vacuum device and used for adsorbing oxygen in the vacuum device; An adsorbent replacement port is located on the side of the vacuum device and is used to replace the oxygen adsorbent material; wherein the adsorbent replacement port is provided with a switch component for controlling its switch.

8. The controlled atmosphere fresh-keeping device according to claim 3, characterized in that: The gas outlet of the gas storage device is arranged on the side of the gas storage device, wherein there are one or more controlled atmosphere fresh-keeping drawers, and the gas outlet of the gas storage device is arranged in a one-to-one correspondence with the controlled atmosphere fresh-keeping drawers; The gas storage device further includes a ventilation port, which is provided on a side of the gas storage device and is used to replace air for the gas storage device; Wherein, the gas outlet of the gas storage device and the ventilation port of the gas storage device are both provided with a switch component for controlling their own switches.

9. The controlled atmosphere fresh-keeping device according to claim 8, characterized in that: Also includes: A controlled atmosphere fresh-keeping drawer shell, wherein the controlled atmosphere fresh-keeping drawer is located inside the controlled atmosphere fresh-keeping drawer shell, the controlled atmosphere fresh-keeping drawer is slidably connected to the controlled atmosphere fresh-keeping drawer shell, and the gas delivery device is located on the rear side of the controlled atmosphere fresh-keeping drawer shell and is fixedly connected to the controlled atmosphere fresh-keeping drawer shell; wherein a sealing gasket is provided at the opening of the controlled atmosphere fresh-keeping drawer shell for sealing after the controlled atmosphere fresh-keeping drawer is pushed into the controlled atmosphere fresh-keeping drawer shell; an air inlet of the controlled atmosphere fresh-keeping drawer is provided on the controlled atmosphere fresh-keeping drawer shell and corresponds to an air outlet of the gas storage device; The sensor is located in the controlled atmosphere fresh-keeping drawer and is used to detect the gas concentration in the controlled atmosphere fresh-keeping drawer. The sensor includes at least an oxygen concentration sensor and a hydrogen concentration sensor.

10. A refrigerator, characterized in that: The invention comprises the controlled atmosphere fresh-keeping device according to any one of claims 1 to 9.

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