CN114111174A - Fresh-keeping device and refrigerator - Google Patents

Abstract

The application relates to the technical field of food material preservation and discloses a preservation device. The preservation device comprises a storage box body and an air conditioning module, wherein the air conditioning module is arranged in the storage box body and is configured to generate nitric oxide gas so as to preserve food materials stored in the storage box body. This application is through setting up the gas module of adjusting that can generate the nitric oxide gas in storing the box, and the gas module of adjusting generates the nitric oxide gas to in releasing the storage box with the nitric oxide gas, make the gaseous concentration of the nitric oxide in the storage box rise, not only can reduce the respiratory frequency of eating the material in the storage box, can also restrain and eat material release ethylene, thereby slow down the rotten speed of eating the material, realized the extension and eat the effect of material fresh-keeping term. The application also discloses a refrigerator.

Description

Fresh-keeping device and refrigerator

Technical Field

The application relates to the technical field of food material preservation, for example to a preservation device and a refrigerator.

Background

Along with the improvement of living standard of people, healthy diet is gradually paid attention to by people. An important aspect of healthy diet is dietary balance, and a certain amount of fruits and vegetables are required to be obtained every day by a human body so as to ensure the supplement of dietary fiber and vitamins. The fruits and vegetables are easy to decay, and especially the leaf vegetables have very short fresh-keeping period.

At present, in order to prolong the preservation period of fruits and vegetables, the fruits and vegetables are usually put into a refrigerator for refrigeration and preservation, and the respiration rate of the fruits and vegetables is slowed down to a certain extent by reducing the ambient temperature of the fruits and vegetables so as to prolong the preservation period of the fruits and vegetables.

In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art:

the environmental temperature of the fruits and vegetables is reduced, and the storage life of the fruits and vegetables can be prolonged to a certain extent. However, in a low-temperature environment, fruits and vegetables still release ethylene, so that the decay rate of the fruits and vegetables is still high.

Disclosure of Invention

The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview nor is intended to identify key/critical elements or to delineate the scope of such embodiments but rather as a prelude to the more detailed description that is presented later.

The embodiment of the disclosure provides a fresh-keeping device and a refrigerator, and aims to solve the problems that fruits and vegetables can still release ethylene and the decay speed is high in a low-temperature environment.

In some embodiments, the freshness device comprises: the storage box body and the air conditioning module are arranged in the storage box body and are configured to generate nitric oxide gas so as to keep food materials stored in the storage box body fresh.

In some embodiments, the refrigerator comprises the preservation apparatus described above.

The fresh-keeping device and the refrigerator provided by the embodiment of the disclosure can realize the following technical effects:

through set up the gas regulation module that can generate the nitric oxide gas in storing the box, the gas regulation module generates the nitric oxide gas to in releasing the storage box with the nitric oxide gas, make the gaseous concentration rise of the nitric oxide in the storage box, not only can reduce the respiratory frequency of eating the material in the storage box, can also restrain and eat material release ethylene, thereby slow down the rotten speed of eating the material, realized the extension and eaten material fresh-keeping term's effect.

The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.

Drawings

One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the accompanying drawings and not in limitation thereof, in which elements having the same reference numeral designations are shown as like elements and not in limitation thereof, and wherein:

FIG. 1 is a schematic structural diagram of a fresh keeping apparatus according to an embodiment of the present disclosure;

FIG. 2 is a schematic view of a gas-conditioning module according to an embodiment of the present disclosure;

FIG. 3 is a schematic view of another modified atmosphere module according to an embodiment of the present disclosure;

FIG. 4 is a schematic structural diagram of another modified atmosphere module provided by the embodiments of the present disclosure;

FIG. 5 is a schematic view of another modified atmosphere module according to an embodiment of the present disclosure;

FIG. 6 is a schematic structural diagram of another modified atmosphere module provided by the embodiments of the present disclosure;

fig. 7 is a schematic structural diagram of another modified atmosphere module provided by the embodiment of the disclosure;

FIG. 8 is a schematic structural diagram of another freshness keeping device provided by the embodiment of the present disclosure;

fig. 9 is a schematic structural diagram of a refrigerator provided in an embodiment of the present disclosure.

Reference numerals:

100. a storage box body; 110. a body; 120. a cover body; 200. an air conditioning module; 210. a first housing; 211. an air inlet; 212. a first air outlet; 220. an arc generator; 230. a second housing; 231. an air inlet opening; 232. a second air outlet; 240. an isolation net; 241. a first isolation mesh; 242. a second isolation mesh; 250. a first space; 260. a second space; 270. a vent valve; 300. a fan; 400. a gas sensor.

Detailed Description

So that the manner in which the features and elements of the disclosed embodiments can be understood in detail, a more particular description of the disclosed embodiments, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the appended drawings. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may be practiced without these details. In other instances, well-known structures and devices may be shown in simplified form in order to simplify the drawing.

The terms "first," "second," and the like in the description and in the claims, and the above-described drawings of embodiments of the present disclosure, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the present disclosure described herein may be made. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.

In the embodiments of the present disclosure, the terms "upper", "lower", "inner", "middle", "outer", "front", "rear", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the disclosed embodiments and their examples and are not intended to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation. Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meanings of these terms in the embodiments of the present disclosure can be understood by those of ordinary skill in the art as appropriate.

In addition, the terms "disposed," "connected," and "secured" are to be construed broadly. For example, "connected" may be a fixed connection, a detachable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. Specific meanings of the above terms in the embodiments of the present disclosure can be understood by those of ordinary skill in the art according to specific situations.

The term "plurality" means two or more unless otherwise specified.

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.

Referring to fig. 1 to 8, an embodiment of the present disclosure provides a fresh-keeping apparatus, including a storage box 100 and an atmosphere control module 200, wherein the atmosphere control module 200 is disposed in the storage box 100 and configured to generate nitric oxide gas to keep food materials stored in the storage box 100 fresh.

By adopting the preservation device provided by the embodiment of the disclosure, the gas-adjusting module 200 capable of generating the nitric oxide gas can be arranged in the storage box 100, the gas-adjusting module 200 generates the nitric oxide gas and releases the nitric oxide gas into the storage box 100, so that the concentration of the nitric oxide gas in the storage box 100 is increased, the respiratory frequency of food materials in the storage box 100 can be reduced, the release of ethylene by the food materials can be inhibited, the putrefaction speed of the food materials is slowed down, and the effect of prolonging the preservation period of the food materials is realized.

Herein, the refreshing apparatus may be applied to home appliances, cabinets, rooms, etc. having a storage space, and is not particularly limited thereto. The refrigerator is taken as an example in this disclosed embodiment, and other embodiments of this application also can be applied to other storage spaces with fresh-keeping device to improve the concentration of nitric oxide gas in this storage space, restrain the interior fruit vegetables of storage space and eat material and produce ethylene, thereby reduce the concentration of ethylene in the storage space, realize slowing down the corruption speed of fruit vegetables and eat material, prolong the fresh-keeping time limit of eating material.

Here, the food may be used to indicate a fruit and vegetable food, and may include other food materials capable of photosynthesis.

Generally, fruit and vegetable food materials are not suitable for being stored in a freezing way, and the storage life of the food materials is short due to the cold storage of the fruit and vegetable food materials, so that the requirements of people cannot be met. The food materials are stored in a refrigerating way, and the respiration rate of fruits and vegetables can be slowed down only within a certain range, so that the storage life of the food materials is prolonged; but the temperature has little influence on the fruits and vegetables to generate and release ethylene, the putrefaction speed of the fruits and vegetables is still fast along with the increase of the concentration of the ethylene in the space where the fruits and vegetables are located, so that the storage life is still short, and the freshness change of the food materials is also large due to the action of the ethylene.

In the embodiment disclosed in the application, the atmosphere control module 200 capable of generating and releasing nitric oxide gas is additionally arranged in the storage box 100, and the concentration of nitric oxide in the storage box 100 is increased by changing the proportion of gas in the storage box 100, so that the release of ethylene from fruit and vegetable food materials stored in the storage box 100 is inhibited, the content of ethylene in a storage space is reduced, the putrefaction speed of the fruit and vegetable food materials is slowed down, the preservation period of the fruit and vegetable food materials is prolonged, and the preservation effect of the fruit and vegetable food materials is improved.

Optionally, the storage box 100 includes a body 110 and a cover 120 detachably connected to the body 110, the body 110 is provided with an opening, and the cover 120 is detachably connected to a periphery of the opening.

Optionally, a sealing rubber pad is disposed around the opening, and the cover 120 is hermetically connected to the body 110 through the sealing rubber pad. The sealing arrangement of the connection between the cover 120 and the body 110 can prevent the nitric oxide gas in the storage box 100 from flowing out through the gap between the connection between the body 110 and the cover 120, thereby ensuring the stability of the concentration of the nitric oxide gas in the storage box 100.

Optionally, the storage box 100 may be provided with a refrigeration component to reduce the temperature inside the storage box 100, so that the food material stored inside the storage box 100 can realize better preservation effect under the combined action of low temperature and nitric oxide gas.

Optionally, the storage case 100 may be further provided with an insulation layer. The heat preservation layer can be a heat insulation coating and is coated on the inner surface or the outer surface of the storage box body 100 to slow down the dissipation of cold in the storage box body 100, so that the preservation effect of the storage box body 100 on food materials is improved.

Alternatively, the storage case 100 is in a sealed state during the process of storing the food material. Therefore, the concentration reduction of the nitric oxide gas in the storage box body 100 can be avoided, and the inhibition effect of the nitric oxide gas in the storage box body 100 on the generation of ethylene in the fruit and vegetable food materials is ensured.

Alternatively, the atmosphere control module 200 may be movably disposed in the storage box 100, and the atmosphere control module 200 may also be fixedly disposed on the inner wall of the storage box 100, where the connection relationship between the atmosphere control module 200 and the storage box 100 is not particularly limited, as long as the atmosphere control module 200 is disposed in the storage box 100 and can release nitric oxide gas into the storage box 100, thereby inhibiting the production of ethylene from the fruit and vegetable food materials in the storage box 100.

Optionally, the modified atmosphere module 200 comprises a first housing 210 and a power supply, the power supply is connected with the first housing 210, an electric field is generated in the first housing 210, air is introduced into the first housing 210, and under the action of the electric field, nitrogen and oxygen in the air are ionized into nitrogen ions and oxygen ions, and the nitrogen ions and the oxygen ions can be combined to generate nitric oxide gas.

Optionally, the target nitric oxide concentration in the storage tank 100 is controlled in a range of 35 mg per liter to 45 mg per liter. In particular, the target nitric oxide concentration may be 35, 37, 39, 41, 43, or 45 milligrams per liter.

Optionally, the modified atmosphere module 200 comprises an arc generator 220, the arc generator 220 ionizing the air to generate nitric oxide gas. The arc generator 220 may be a device for generating an arc, which is mainly composed of a low-voltage arc line and a high-voltage high-frequency ignition line. Like this, set up arc generator 220 in modified atmosphere module 200, can carry out the ionization to the air through arc generator 220 and generate the nitric oxide gas to make the gaseous concentration of nitric oxide in the storage box 100 rise, not only can reduce the respiratory rate of eating the material in the storage box 100, can also restrain and eat material release ethylene, thereby slow down the rotten speed of eating the material, realized the effect of extension edible material fresh-keeping term.

Optionally, the fresh keeping apparatus further comprises a first housing 210, the arc generator 220 is disposed in the first housing 210; the first housing 210 includes an air inlet 211 and a first air outlet 212, and air enters the first housing 210 through the air inlet 211, is ionized by the arc generator 220, and further generates nitric oxide gas, and is discharged from the first air outlet 212, so that the nitric oxide gas enters the storage tank 100 through the first housing 210. Like this, the concentration of the nitric oxide gas in the storage box 100 rises, can effectively restrain the release ethylene of the fruit vegetables edible material in the storage box 100 to reduce the concentration of ethylene in the storage box 100, and then slow down the rotten speed of fruit vegetables edible material, prolong the fresh-keeping term of fruit vegetables edible material, improve the fresh-keeping effect of fruit vegetables edible material.

Optionally, the first housing 210 is made of an insulating material. Since the arc generator 220 is disposed in the first housing 210, in order to not affect the electric field of the space for storing the food material in the storage box 100, the first housing 210 may be made of an insulating material, so as to effectively isolate the space inside the first housing 210 from the space outside the first housing 210, and the effect of the arc generator 220 on the air inside the first housing 210 will not affect the storage space outside the first housing 210.

Alternatively, the volume ratio of the first housing 210 to the storage case 100 ranges from 1:1.75 to 1: 3.25. In the case where the volume of the storage case 100 is less than or equal to 1.75 times the volume of the first housing 210, the space available for storing food materials in the storage case 100 is too small, so that the storage case 100 cannot effectively store food materials. When the volume of the storage tank 100 is more than 3.25 times the volume of the first casing 210, the nitrogen monoxide gas generated in the first casing 210 is insufficient to suppress the generation of ethylene from the food stored in the storage tank 100. Thus, when the volume ratio of the first housing 210 to the storage box 100 is in the range of 1:1.75 to 1:3.25, the space for storing the food material can be enough, and the nitric oxide gas generated in the first housing 210 can effectively inhibit the food material stored in the storage box 100 from generating ethylene, so that the putrefaction speed of the food material can be slowed down, and the effect of prolonging the freshness date of the food material can be realized.

Specifically, the volume ratio of the first housing 210 to the storage case 100 may be 1:1.75, 1:2, 1:2.25, 1:2.5, 1:2.75, 1:3, or 1: 3.25. Here, the volume of the storage case 100 may represent the number of unit objects that can be accommodated in the storage case 100. Since the first housing 210 is disposed in the storage case 100, the storage case 100 is easily larger than the volume of the first housing 210.

Optionally, the preservation apparatus further comprises a second housing 230, the second housing 230 being in communication with the first housing 210 and being configured to store nitric oxide gas. In this way, the modified atmosphere module 200 not only has the function of generating nitric oxide gas, but also can store the generated nitric oxide gas. In practical application, the nitric oxide gas generated in the first shell 210 is introduced into the second shell 230 for storage, and then the second shell 230 is controlled to introduce the nitric oxide gas into the storage tank 100 according to the concentration of the nitric oxide gas in the storage tank 100. The generation process of the nitric oxide gas in the first shell 210 does not need to be started and stopped frequently, the starting and stopping frequency of the arc generator 220 is reduced, and the service life of the arc generator 220 is prolonged.

Optionally, the second housing 230 is disposed outside the first housing 210, and the second housing 230 is in communication with the first housing 210 through a vent line. Optionally, the second housing 230 includes a second gas outlet 232, and the nitric oxide gas stored in the second housing 230 is discharged through the second gas outlet 232. The nitric oxide gas generated in the first shell 210 enters the second shell 230 through the vent pipe, the second shell 230 can be filled with the metal organic framework compound, a part of the nitric oxide gas is stored in the material gap of the metal organic framework compound, the other part of the nitric oxide gas and the metal organic framework compound are subjected to a complex reaction to generate a complex, and the complex and the water molecules are subjected to a displacement reaction under the condition that the complex meets the water molecules, so that the nitric oxide molecules are separated from the complex and are discharged through the second gas outlet 232, and the slow release effect of the nitric oxide is realized.

Alternatively, the second housing 230 is disposed in the first housing 210, and the second housing 230 communicates with the space in the first housing 210 through the air inlet opening 231. Wherein, an air pump may be disposed at the air inlet 231 to drive the air in the first housing 210 into the second housing 230.

Alternatively, the second air outlet 232 may be located at a first surface of the second housing 230, and the air inlet opening 231 of the second housing 230 may be disposed at a second surface of the second housing 230. The second surface may be a surface opposite to the first surface, and the second surface may also be a surface adjacent to the first surface. The air inlet 231 of the second housing 230 may also be disposed opposite to the second air outlet 232.

Alternatively, the air inlet 231 of the second housing 230 may be multiple, and the multiple air inlets 231 may be disposed on the same surface of the second housing 230, or disposed on different surfaces of the second housing 230.

Optionally, the second air outlet 232 coincides with the first air outlet 212. The nitric oxide gas stored in the second housing 230 is discharged out of the second housing 230 through the overlapping position of the second gas outlet 232 and the first gas outlet 212, and enters the storage tank 100.

Optionally, there may be a spacing space between the second air outlet 232 and the first air outlet 212. The space is communicated with the space where the arc generator 220 is located, and the space is not communicated with the space where the arc generator 220 is located, and here, the specific position of the space is not limited.

Optionally, the fresh keeping device further includes a metal organic framework compound, and the metal organic framework compound is filled in the second housing 230. The copper ions in the metal organic framework compound react with the nitric oxide to generate a complex, so that the storage effect of the metal organic framework compound on the nitric oxide gas is realized. The complex generated by the reaction of the metal organic framework compound and the nitric oxide generates a displacement reaction with water molecules under the condition of encountering the water molecules, so that the nitric oxide molecules are separated from the complex and discharged out of the second shell 230, thereby realizing the slow release effect of the controlled atmosphere module 200 on the nitric oxide.

Optionally, the fresh keeping device further comprises a separation net 240, wherein the separation net 240 is arranged in the second housing 230 and divides the space in the second housing 230 into a first space 250 and a second space 260; the first space 250 is communicated with the first housing 210, the second space 260 is communicated with the second gas outlet 232, and the metal organic framework compound is filled in the second space 260. Thus, the second housing 230 includes a first space 250 in which nitric oxide gas can be directly stored, and a second space 260 in which a complex is generated by a reaction of the metal organic framework compound and nitric oxide. The separation net 240 is a net structure, so that nitric oxide gas can pass through without obstruction, nitric oxide enters the second space 260 from the first space 250, the second space 260 is directly communicated with the space in the storage box 100, and a complex generated by the reaction of the metal organic framework compound filled in the second space 260 and nitric oxide generates a displacement reaction with water molecules under the condition of meeting the water molecules, so that nitric oxide molecules are separated from the complex and are discharged out of the second shell 230, thereby realizing the slow release effect of the controlled atmosphere module 200 on nitric oxide.

Optionally, the isolation mesh 240 is connected to the inner wall of the second housing 230 provided with the second air outlet 232, and encloses a second space 260, at this time, the first space 250 is communicated with the space in the first housing 210, the nitric oxide gas generated by ionization in the first housing 210 is introduced into the first space 250 through the communication pipe, and the nitric oxide gas in the first space 250 passes through the isolation mesh 240 and reacts with the metal-organic framework compound in the second space 260 to generate a complex, so as to store nitric oxide.

Optionally, the separation net 240 includes a first separation net 241 and a second separation net 242, the second housing 230 further includes an air inlet 231, the first separation net 241 and the second separation net 242 define a second space 260 through a passage between the air inlet 231 and the second air outlet 232 of the second housing 230, and the second space 260 is filled with the metal organic framework compound. Thus, the nitric oxide gas is inevitably passed through the second space 260 from the air inlet 231 to the second air outlet 232 of the second housing 230, and the second space 260 is filled with the metal-organic framework compound, so that the complex generated by the reaction between the metal-organic framework compound and the nitric oxide reacts with water molecules, and the nitric oxide molecules are separated from the complex and discharged out of the second housing 230, thereby realizing the slow release effect of the modified atmosphere module 200 on the nitric oxide.

Optionally, the fresh keeping device further comprises a ventilation valve 270, wherein the ventilation valve 270 is disposed at the second air outlet 232 and configured to control the opening and closing of the second air outlet 232 according to the operating state of the arc generator 220. Specifically, in the operating state of the arc generator 220, the vent valve 270 is controlled to be closed, and the second air outlet 232 is controlled to be closed; in the non-operating state of the arc generator 220, the vent valve 270 may be controlled to open and the second vent 232 may be controlled to open. Thus, by controlling the vent valve 270, the release of nitric oxide gas from the modified atmosphere module 200 can be controlled, and whether the modified atmosphere module 200 releases nitric oxide gas can be controlled according to the nitric oxide generation condition of the modified atmosphere module 200, so that the sealing performance of the modified atmosphere module 200 during the generation of nitric oxide in the modified atmosphere module 200 can be improved, and the generation rate of nitric oxide in the first housing 210 can be improved; and, in the nitric oxide generating process, the nitric oxide gas concentration in the storage tank is stable, and potential safety hazards are avoided.

Optionally, the fresh keeping device further comprises a blower 300, and the blower 300 is disposed in the storage box 100 and configured to drive ventilation circulation in the storage box 100. In the case where the nitric oxide gas generated in the modified atmosphere module 200 is discharged into the storage tank 100, in order to rapidly achieve a uniform state of the concentration of the nitric oxide gas throughout the storage tank 100, a blower 300 may be provided in the storage tank 100 to accelerate the circulation speed of the air in the storage tank 100.

Optionally, the blower 300 is disposed at the top of the space in the storage box 100 to accelerate the ventilation in the storage box 100, so that the concentration of the nitric oxide gas in each location in the storage box 100 can be rapidly uniform.

Optionally, the fresh keeping apparatus further comprises a gas sensor 400, and the gas sensor 400 is disposed in the storage tank 100 and configured to detect the concentration of the nitric oxide gas in the storage tank 100. In this way, the concentration of nitric oxide gas in the storage tank 100 can be monitored in real time.

Alternatively, the gas sensor 400 is disposed at the bottom of the space in the storage tank 100, and since the relative molecular mass of the nitric oxide gas is slightly smaller than the average relative molecular mass of air, the gas sensor 400 is disposed at a lower position in the space, which is more accurate in detecting the concentration of the nitric oxide gas in the space.

Optionally, the vent valve 270 may also control the opening of the second outlet 232, and the vent valve 270 may be configured to: receiving the concentration of the nitric oxide gas transmitted from the gas sensor 400, comparing the concentration of the nitric oxide gas with a preset target concentration, and taking a concentration difference value between the concentration of the nitric oxide gas and the preset target concentration under the condition that the concentration of the nitric oxide gas is less than the preset target concentration; controlling the opening of the vent valve 270 to increase under the condition that the concentration difference is greater than a preset threshold value; in the case where the concentration difference is smaller than the preset threshold, the opening of the vent valve 270 is controlled to decrease. In the case where the concentration of nitric oxide gas is greater than or equal to the preset target concentration, the vent valve 270 is closed. The concentration of the nitric oxide in the storage tank 100 may be a preset concentration of nitric oxide, and the preset concentration of nitric oxide may be a target concentration.

Therefore, the state of the second air outlet 232 of the controlled atmosphere module 200 can be controlled according to the detected concentration of the nitric oxide gas, so that the opening of the second air outlet 232 of the controlled atmosphere module 200 can be intelligently adjusted and whether the opening is closed or not, the situation that the effective preservation effect cannot be realized due to the fact that the concentration of the nitric oxide gas in the storage box 100 is too low can be prevented, and the situation that the concentration of the nitric oxide gas in the storage box 100 is too high to cause danger can be avoided.

With reference to fig. 9, an embodiment of the present disclosure provides a refrigerator including the refreshing apparatus as described above.

By adopting the refrigerator provided by the embodiment of the disclosure, the gas-adjusting module 200 capable of generating nitric oxide gas can be arranged in the storage box body 100, the gas-adjusting module 200 generates the nitric oxide gas and releases the nitric oxide gas into the storage box body 100, so that the concentration of the nitric oxide gas in the storage box body 100 is increased, the breathing frequency of food materials in the storage box body 100 can be reduced, the release of ethylene by the food materials can be inhibited, the spoilage speed of the food materials is slowed down, and the effect of prolonging the fresh-keeping period of the food materials is realized.

Optionally, the refrigerator includes a plurality of refrigerating storage compartments, and the freshness retaining device may be disposed in any refrigerating storage compartment for retaining freshness of fruit and vegetable food materials. In this case, the fresh keeping apparatus may be provided with the storage compartment as the storage compartment 100 without separately providing the storage compartment 100, and the atmosphere control module 200 may be provided directly in the storage compartment. Under the effect of the air conditioning module 200 of the fresh-keeping device, the concentration of nitric oxide in the storage cabin is increased, so that the respiration rate of the fruit and vegetable food materials is reduced, the generation of ethylene by the fruit and vegetable food materials is inhibited, the concentration of ethylene in the storage cabin is reduced, the putrefaction speed of the fruit and vegetable food materials in the refrigerator is slowed down, the fresh-keeping period of the fruit and vegetable food materials in the refrigerator is prolonged, and the fresh-keeping effect of the refrigerator on the fruit and vegetable food materials is improved.

Optionally, the copper ions in the metal-organic framework compound of the modified atmosphere module 200 react with nitric oxide to generate a complex, so as to realize the storage effect of the metal-organic framework compound on nitric oxide gas. Because the refrigeration storage cabin of the refrigerator has a refrigeration function, the fruit and vegetable food materials stored in the storage cabin of the refrigerator can generate condensed water vapor, the condensed water vapor enters the second shell 230 filled with the metal organic framework compound along with air flow, and the water molecules and the complex compound undergo a displacement reaction, so that the nitric oxide is separated from the complex compound again, and the effect of slowly releasing the nitric oxide gas by the gas regulation module 200 is realized.

The above description and drawings sufficiently illustrate embodiments of the disclosure to enable those skilled in the art to practice them. Other embodiments may incorporate structural, logical, electrical, process, and other changes. The examples merely typify possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in or substituted for those of others. Furthermore, the words used in the specification are words of description only and are not intended to limit the claims. As used in the description of the embodiments and the claims, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. Furthermore, the terms "comprises" and/or "comprising," when used in this application, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. Without further limitation, an element defined by the phrase "comprising an …" does not exclude the presence of other like elements in a process or device that comprises the element. In this document, each embodiment may be described with emphasis on differences from other embodiments, and the same and similar parts between the respective embodiments may be referred to each other.

Claims (10)

1. A freshness retaining device, comprising:

a storage box body;

and the gas adjusting module is arranged in the storage box body and is configured to generate nitric oxide gas so as to keep food materials stored in the storage box fresh.

2. The freshness retaining device of claim 1, further comprising:

and the first shell comprises an air inlet and a first air outlet, air enters the first shell from the air inlet, and generated nitric oxide gas is discharged from the first air outlet.

3. The freshness device of claim 2, wherein a volume ratio of the first housing to the storage tank is in a range of 1:1.75 to 1: 3.25.

4. The freshness retaining device of claim 2 or 3, further comprising:

a second housing in communication with the first housing configured to store nitric oxide gas.

5. The freshness retaining device of claim 4, wherein the second housing comprises:

and the nitric oxide gas stored in the second shell is discharged through the second gas outlet.

6. The freshness retaining device of claim 5, further comprising:

and the metal organic framework compound is filled in the second shell.

7. The freshness retaining device of claim 6, further comprising:

the isolation net is arranged in the second shell and divides the space in the second shell into a first space and a second space; the first space is communicated with the first shell, the second space is communicated with the second air outlet, and the metal organic framework compound is filled in the second space.

8. The preservation apparatus according to claim 5, wherein the modified atmosphere module comprises: an arc generator disposed within the first housing; the air is ionized to generate nitric oxide gas.

9. The freshness retaining device of claim 8, further comprising:

and the ventilation valve is arranged at the second air outlet and is configured to control the opening and closing of the second air outlet according to the working state of the electric arc generator.

10. A refrigerator characterized by comprising the freshness retaining device according to any one of claims 1 to 9.

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