A fresh-keeping storage cabinet

Abstract

The application discloses a storage cabinet, belonging to the technical field of grain storage, comprising a cabinet body, at least a vacuum area and a nitrogen area are arranged on the cabinet body, at least one vacuum cabin capable of being opened and closed is arranged in the vacuum area, the vacuum cabin can be in a vacuum environment after being closed, at least one nitrogen cabin capable of being opened and closed is arranged in the nitrogen area, the nitrogen cabin can be in a nitrogen environment after being closed, and a temperature and humidity control system is arranged in the vacuum cabin and the nitrogen cabin. The vacuum cabin and the nitrogen cabin can provide a vacuum storage space and a nitrogen storage space of a low-oxygen environment respectively, so that the growth and reproduction of microorganisms are inhibited, the speed of mildewing and the occurrence of insect pests are reduced, the setting of the temperature and humidity control system can meet the requirements of being cool, dry, sealed and light-proof, moisture and mildewing are prevented, the fresh-keeping effect of household commonly used food such as grains, dried fruits, edible oil and tea and commonly used medicines is met, the market blank is filled, the food safety of a family is ensured from the source, and food waste is reduced.

Description

Technical Field

[0001] This invention relates to the field of grain storage technology, and in particular to a fresh-keeping storage cabinet. Background Technology

[0002] Currently, household refrigerators, as a widely used home appliance, are primarily designed and used for the low-temperature storage of fresh food, such as meat, seafood, vegetables, and fruits, to extend their short shelf life. However, in daily life, grains (such as rice, cereals, flour, noodles, and beans), dried fruits (such as peanuts), and cooking oils are also core components of the family diet and are usually stored in large quantities for extended periods. These substances are rich in carbohydrates and fats, and their storage conditions are drastically different from those of fresh food. They require more stringent storage environments, needing to be stored in cool, dry, sealed, and dark places to prevent moisture, mold, and pests. Household refrigerators are insufficient to meet the storage needs of grains.

[0003] Currently, most households lack dedicated storage equipment for such substances. The common practice is to place them directly in room-temperature cupboards using their original packaging or ordinary containers. In kitchens, where temperature and humidity fluctuate greatly, especially in the hot and humid summer, grains are highly susceptible to becoming damp and heating up, creating ideal conditions for microbial growth and pest infestation. Furthermore, improper storage conditions can easily lead to mold growth in grains, potentially producing aflatoxin. In 1993, the International Agency for Research on Cancer (IARC) of the World Health Organization (WHO) classified aflatoxin as a Group 1 carcinogen, indicating its extremely high toxicity (studies show it to be approximately 68 times more toxic than arsenic and 10 times more toxic than potassium cyanide). Long-term consumption of contaminated food significantly increases the risk of developing malignant tumors such as liver and stomach cancer, seriously threatening human health.

[0004] Therefore, there is an urgent need for a specialized storage device designed specifically for home and other scenarios, capable of effectively preserving grains and cooking oils and preventing insect and mold infestation, to fill the market gap, ensure food safety in households from the source, and reduce food waste. Summary of the Invention

[0005] The purpose of this invention is to solve the above-mentioned technical problems and provide a fresh-keeping storage cabinet. Through a vacuum chamber and a nitrogen chamber, it can provide a low-oxygen environment for vacuum storage and a nitrogen storage environment, respectively. This effectively inhibits the growth and reproduction of microorganisms, prevents the oxidation and deterioration of grains and oils, reduces the rate of mold growth and pest infestation, and provides suitable temperature and humidity control to meet the storage requirements of coolness, dryness, sealing, and light protection, preventing moisture and mold growth. This satisfies the need for preserving grains, dried fruits, edible oils, tea, and other household food products, filling a market gap, ensuring household food safety from the source, and reducing food waste.

[0006] To achieve the above objectives, the present invention provides the following solution: The present invention discloses a food preservation storage cabinet, including a cabinet body, wherein the cabinet body is provided with at least a vacuum zone and a nitrogen zone, wherein the vacuum zone is provided with at least one vacuum chamber that can be opened and closed, and the vacuum chamber can be in a vacuum environment when closed, wherein the nitrogen zone is provided with at least one nitrogen chamber that can be opened and closed, and the nitrogen chamber can be in a nitrogen environment when closed, wherein both the vacuum chamber and the nitrogen chamber are provided with a temperature and humidity control system.

[0007] In one embodiment, the nitrogen chamber includes a storage chamber and a retrieval chamber that are independent of each other. The retrieval chamber is located below the storage chamber. The outer wall of the retrieval chamber is provided with a retrieval window. The bottom wall of the storage chamber is provided with a discharge valve that communicates with the storage chamber. The discharge valve responds to a switch signal and performs opening and closing actions.

[0008] In one embodiment, both the vacuum chamber and the nitrogen chamber are drawer-type storage compartments.

[0009] In one embodiment, an electromagnetic lock is provided between the vacuum chamber and the nitrogen chamber and the cabinet. The electromagnetic lock responds to an electromagnetic lock switch signal to open and close the electromagnetic lock.

[0010] In one embodiment, the cabinet is further provided with an equipment area, which contains an equipment compartment. The equipment compartment contains a vacuum machine and a nitrogen supply device. The vacuum machine is connected to the vacuum compartment via a vacuum pipeline, which is equipped with a vacuum valve. The nitrogen supply device is connected to the nitrogen compartment via a nitrogen pipeline, which is equipped with a nitrogen valve. The nitrogen compartment is provided with a replacement pipeline connected to the outside, which is equipped with a replacement valve.

[0011] In one embodiment, the nitrogen supply equipment includes a nitrogen generator and / or a nitrogen cylinder.

[0012] In one embodiment, the vacuum chamber is equipped with a vacuum level detection sensor; the nitrogen chamber is equipped with an oxygen concentration detection sensor and a nitrogen concentration detection sensor. When the vacuum level detected by the vacuum level sensor is less than the set vacuum level, the vacuum valve opens and the vacuum machine is started to perform vacuum treatment in the vacuum chamber. When the vacuum environment in the vacuum chamber reaches the set vacuum level, the vacuum machine stops working and the vacuum valve closes. When the oxygen concentration detected by the oxygen concentration sensor is lower than the set oxygen concentration, and the nitrogen concentration detected by the nitrogen concentration sensor is lower than the set nitrogen concentration, the nitrogen valve and the replacement valve are opened, and the nitrogen supply equipment is started to replace the nitrogen in the nitrogen chamber with nitrogen. Once the environment in the nitrogen chamber reaches the set nitrogen and oxygen concentrations simultaneously, the nitrogen supply equipment stops working, and the nitrogen valve and the replacement valve are closed.

[0013] In one embodiment, the vacuum zone, the nitrogen zone, and the equipment zone are arranged sequentially from top to bottom.

[0014] In one embodiment, both the vacuum chamber and the nitrogen chamber are equipped with sterilization and insect repellent devices.

[0015] In one embodiment, the sterilization and insect repellent device includes an ultraviolet sterilization lamp and an ultrasonic insect repellent.

[0016] In one embodiment, the temperature and humidity control system includes a temperature sensor, a humidity sensor, and a cooling and heating device.

[0017] In one embodiment, the cooling and heating device includes a semiconductor cooling chip and a PTC heater, with a water collection tank located below the semiconductor cooling chip.

[0018] In one embodiment, a water storage tank is provided at the rear of the cabinet, and a drain pipe communicating with the water storage tank is provided at the bottom of the water collection tank.

[0019] In one embodiment, when the temperature detected by the temperature sensor is higher than the set temperature, the cooling mode is activated: When a positive voltage is applied to the thermoelectric cooler, the cold end of the thermoelectric cooler begins to absorb heat from the surrounding environment to achieve cooling, while the hot end dissipates heat to the outside. Once the ambient temperature reaches the set temperature, the thermoelectric cooler stops working. When the temperature detected by the temperature sensor is lower than the set temperature, the heating mode is activated. The heating mode includes three strategies: Normal heating strategy: When a reverse voltage is applied to the thermoelectric cooler, the hot end of the thermoelectric cooler becomes the cold end to absorb heat, and the cold end becomes the hot end to release heat. Once the ambient temperature reaches the set temperature, the thermoelectric cooler stops working. Rapid heating strategy: The PTC heater is activated to heat the ambient temperature. Once the ambient temperature reaches the set temperature, the PTC heater stops working. Precise heating strategy: First, start the PTC heater to heat. When the ambient temperature approaches the set temperature, switch to the semiconductor cooling chip for heating. When the ambient temperature reaches the set temperature, the semiconductor cooling chip stops working. When the humidity sensor detects a humidity level higher than the set humidity level, humidity control is activated. Humidity control includes two modes: Condensation dehumidification mode: A positive voltage is applied to the thermoelectric cooler, and the temperature of the cold end of the thermoelectric cooler drops to the water vapor condensation temperature, so that the moisture in the surrounding environment condenses into water droplets on the cold end of the thermoelectric cooler. At the same time, the PTC heater is activated to perform heating compensation to keep the ambient temperature constant at the set temperature. Once the ambient temperature reaches the set humidity, the thermoelectric cooler and the PTC heater stop working. Heating and dehumidifying mode: The PTC heater is activated to heat and dry the surrounding environment until the set humidity is reached.

[0020] In one embodiment, the vacuum chamber and the nitrogen chamber are equipped with weighing devices for quantifying the stored contents.

[0021] In one embodiment, some or all of the nitrogen chambers are provided with a stirring mechanism for agitating bulk stored materials.

[0022] In one embodiment, the cabinet is provided with a cabinet door, and the cabinet door is provided with a touch screen for displaying information and performing operations.

[0023] The present invention achieves the following technical effects compared to the prior art: In this invention, a vacuum chamber and a nitrogen chamber provide a vacuum environment and a nitrogen environment, creating a low-oxygen storage space. This low-oxygen storage space can effectively inhibit the growth and reproduction of microorganisms, prevent the oxidation and deterioration of grains and oils, reduce the rate of mold growth and pest infestation, and achieve the purpose of preservation. Meanwhile, the temperature and humidity control system can provide suitable temperature and humidity to meet the requirements of coolness, dryness, sealing and light protection, preventing moisture and mold growth. This invention meets the preservation needs of household food products such as grains (e.g., rice, miscellaneous grains, flour, noodles, beans), dried fruits (e.g., peanuts), edible oils and tea, filling a market gap, ensuring household food safety from the source, and reducing food waste.

[0024] Other technical solutions of the present invention have achieved the following technical effects compared with the prior art: 1. This invention is also equipped with temperature and humidity sensors, allowing users to monitor and adjust the temperature and humidity inside the chamber in real time, ensuring that grains and oils are stored under optimal preservation conditions.

[0025] 2. In order to improve the insect and mold prevention effect, an ultraviolet sterilization lamp and an ultrasonic insect repellent are specially added to this invention, which can effectively sterilize and disinfect, inhibit the growth of pests and mold, and thus extend the shelf life of food.

[0026] 3. In this invention, the refrigeration and heating equipment includes a semiconductor cooling chip and a PTC heater. By using the semiconductor cooling chip and the PTC heater together, various control modes and strategies can be formed, such as temperature control and humidity control. Temperature control includes a cooling mode and a heating mode. The heating mode includes a normal heating strategy, a rapid heating strategy, and a precise heating strategy. Humidity control includes a condensation dehumidification mode and a reheat dehumidification mode. Different modes and strategies are adopted for different situations, which can ensure that the vacuum chamber and the nitrogen chamber can be maintained at the optimal storage temperature and humidity.

[0027] 4. In this invention, a stirring mechanism is installed inside the nitrogen chamber to periodically stir the bulk stored materials (such as rice, beans, or grains and oils), exposing the deeper layers of the bulk stored materials to the surface. This avoids the problem that, due to the thick accumulation of bulk stored materials, the surface temperature and humidity of the bulk stored material pile are within acceptable limits (matching the set temperature and humidity), while the internal temperature and humidity are either too high or too low (matching the set temperature and humidity). Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained by analyzing these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the front structure of the food storage cabinet in an embodiment of the present invention; Figure 2 This is a schematic diagram of the front structure of the food storage cabinet (after the cabinet door is opened) in an embodiment of the present invention; Figure 3 This is a schematic diagram of the internal structure of the back of the food storage cabinet in an embodiment of the present invention; Figure 4 This is a three-dimensional structural diagram of the nitrogen chamber in an embodiment of the present invention; Figure 5 This is a cross-sectional view of the nitrogen chamber in an embodiment of the present invention; Figure 6 This is a schematic diagram of the internal structure of the nitrogen chamber's installation room and discharge room in an embodiment of the present invention; Figure 7 This is a schematic diagram of the stirring mechanism in an embodiment of the present invention.

[0030] Explanation of reference numerals in the attached diagram: 1. Cabinet; 2. Cabinet door; 3. Touch screen; 4. Vacuum chamber; 5. Nitrogen chamber; 6. Equipment compartment; 7. Retrieval window; 8. Discharge button; 9. Release button; 10. Vacuum machine; 11. Nitrogen generator; 12. Nitrogen cylinder; 13. Power supply; 14. Vacuum pipeline; 15. Vacuum valve; 16. Nitrogen pipeline; 17. Multi-point nitrogen nozzle; 18. Nitrogen valve; 19. Replacement pipeline; 20. Replacement valve; 21. Receiving cup; 22. Storage chamber; 23. Installation chamber; 24. Discharge chamber; 25. Discharge port; 26. Feed port; 27. Opening and closing plate; 28. Slide chute; 29. ​​Drive motor; 30. Drive gear set; 31. Stirring shaft; 32. Spiral blade; 33. Active telescopic rod. Detailed Implementation

[0031] 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 analyzed and obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] The purpose of this invention is to provide a food preservation cabinet to solve the problems existing in the prior art. By using a vacuum chamber and a nitrogen chamber, it can provide a low-oxygen environment for vacuum storage and a nitrogen storage space, respectively, which can effectively inhibit the growth and reproduction of microorganisms, prevent the oxidation and deterioration of grains and oils, reduce the rate of mold growth and pests, and achieve the purpose of preservation. The temperature and humidity control system can provide suitable temperature and humidity to meet the needs of coolness, dryness, sealing and light protection, and prevent moisture and mold growth. This invention meets the preservation needs of household food products such as grains, dried fruits, edible oils and tea, fills a market gap, ensures household food safety from the source, and reduces food waste.

[0033] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] like Figures 1 to 7As shown, this embodiment provides a food preservation storage cabinet, including a cabinet body 1. The cabinet body 1 has at least a vacuum zone and a nitrogen zone. The vacuum zone contains at least one vacuum chamber 4, which can be opened and closed. When closed, the vacuum chamber 4 creates a vacuum environment, forming a low-oxygen and low-humidity environment to achieve the purpose of suffocation and oxygen deficiency, and inhibiting oxidation. The nitrogen zone contains at least one nitrogen chamber 5, which can be opened and closed. When closed, the nitrogen chamber 5 creates a nitrogen environment, similarly achieving a low-oxygen and low-humidity environment. Both the vacuum chamber 4 and the nitrogen chamber 5 are equipped with temperature and humidity control systems. The vacuum chamber 4 is mainly used for storing foods that can be vacuum-preserved, such as noodles and tea. The nitrogen chamber 5 is mainly used for storing foods such as rice, beans, dried fruits, or cooking oil. Through the vacuum and nitrogen environments, the rate of mold growth and the occurrence of pests can be reduced, achieving the purpose of preservation. The temperature and humidity control system provides suitable temperature and humidity for grains (such as rice, cereals, flour, noodles, and beans), dried fruits (such as peanuts), cooking oil, and tea, ensuring a cool, dry, sealed, and light-proof environment (cabinet 1, vacuum chamber 4, and nitrogen chamber 5 are all made of light-blocking material, i.e., non-transparent material). This prevents moisture, mold, and oxidation, especially for cooking oil, which is prone to oxidation and rancidity when exposed to air, light, and room temperature, producing a rancid taste that not only affects the taste but is also detrimental to health with long-term consumption. This food storage cabinet fills a market gap, ensuring food safety for families from the source and reducing food waste.

[0035] In one embodiment of this invention, the nitrogen zone is equipped with multiple nitrogen chambers 5, which can be divided into a nitrogen chamber 5 specifically for storing grains (rice, beans, dried fruits, and miscellaneous grains, etc.) and a nitrogen chamber 5 specifically for storing edible oils. Labels can be affixed in advance for precise differentiation, facilitating retrieval and preventing the mixing of different substances. Preferably, the multiple nitrogen chambers 5 can be arranged in an array, for example: [reference needed]. Figure 2 As shown, there are six nitrogen chambers in two rows and three columns.

[0036] In one embodiment of this invention, the nitrogen chamber 5 includes a storage chamber and a retrieval chamber, which are independent of each other, with the retrieval chamber located below the storage chamber. A retrieval window 7 is provided on the outer wall (facing the operator) of the retrieval chamber, and a discharge valve is provided on the bottom wall of the storage chamber, communicating with the retrieval chamber. The discharge valve responds to a valve switch signal, opening and closing. There are at least three ways to send the valve switch signal: first, a discharge button 8 is provided on the outer wall (facing the operator) of the nitrogen chamber 5 (storage chamber), used to control the opening and closing of the discharge valve; second, the discharge valve is controlled remotely; and third, the discharge button 8 is switched on and off via a mobile app.

[0037] In the first method, pressing the discharge button 8 opens the discharge valve, releasing the grains or cooking oil from the storage chamber of nitrogen chamber 5. At this point, placing the container in the retrieval chamber below the discharge valve allows it to collect the grains or cooking oil. Therefore, the grains or cooking oil need to be stored loosely in nitrogen chamber 5 (storage chamber). Using this method reduces the frequency of opening nitrogen chamber 5; it only needs to be opened when replenishment is required, thus reducing nitrogen usage, as each opening of nitrogen chamber 5 necessitates re-establishing the nitrogen environment. Preferably, the discharge valve is a solenoid valve with a fast response time. The container can be a receiving cup 21, which can be placed in the retrieval chamber below the discharge valve. Pressing the discharge button 8 allows the receiving cup 21 to directly collect the material. The inner wall of the receiving cup 21 can be marked for easy monitoring of the collected amount. The discharge valve can also be set to a timed closing function. After pressing the discharge button 8, the discharge valve will automatically close after a preset discharge time to achieve quantitative discharge. The preset discharge time can be set according to actual needs. The number of receiving cups 21 matches the number of nitrogen chambers 5. A closable glass door can be installed on the retrieval window 7, or it can be omitted. Installing a glass door reduces dust falling into the normally placed receiving cups 21. It is recommended that the glass door be a single-leaf door, which can be a sliding door or a swing door.

[0038] In one embodiment of this invention, both the vacuum chamber 4 and the nitrogen chamber 5 are drawer-type storage compartments. That is, the top of both the vacuum chamber 4 and the nitrogen chamber 5 has an opening, allowing them to be pulled out of the cabinet 1 like drawers, thus enabling their respective opening and closing. The vacuum chamber 4 and the nitrogen chamber 5 are sealed to the cabinet 1. After being pushed back in, they must remain sealed to ensure that the vacuum chamber 4 creates a vacuum environment and the nitrogen chamber 5 creates a nitrogen environment.

[0039] In one embodiment of this invention, electromagnetic locks are provided between the vacuum chamber 4 and the nitrogen chamber 5 and the cabinet 1. The electromagnetic locks respond to electromagnetic lock switch signals to open and close. The closing signal of the electromagnetic lock mainly involves pushing the vacuum chamber 4 and the nitrogen chamber 5 back, causing the electromagnetic lock to automatically lock and complete the locking of the vacuum chamber 4, the nitrogen chamber 5, and the cabinet 1. There are at least three ways to send the opening signal of the electromagnetic lock: the first is to have a release button 9 on the outer wall of each vacuum chamber 4 and each nitrogen chamber 5, which controls the opening of the electromagnetic lock. The second is to control the opening of the electromagnetic lock via remote control; the third is to open the electromagnetic lock via a mobile app. In the first method, pressing the corresponding release button 9 of each vacuum chamber 4 and nitrogen chamber 5 unlocks the electromagnetic lock, allowing the vacuum chamber 4 and nitrogen chamber 5 to be pulled out and opened.

[0040] In one embodiment of this invention, multiple elastic components can be installed inside the cabinet 1, with each elastic component corresponding to a vacuum chamber 4 and a nitrogen chamber 5. When the release button 9 corresponding to each of the vacuum chamber 4 and nitrogen chamber 5 is pressed, the electromagnetic lock unlocks, and the elastic components automatically spring open the corresponding vacuum chamber 4 and nitrogen chamber 5, creating a gap with the cabinet 1. This gap allows the vacuum chamber 4 and nitrogen chamber 5 to be easily pulled out.

[0041] In one embodiment of this example, each vacuum chamber 4 and each nitrogen chamber 5 is provided with a handle, which allows for easy pulling out of the vacuum chamber 4 and the nitrogen chamber 5.

[0042] In one embodiment of this invention, the cabinet 1 is equipped with multiple push-pull mechanisms, each corresponding to a vacuum chamber 4 and a nitrogen chamber 5. Pressing the release button 9 unlocks the electromagnetic lock, and the push-pull mechanism automatically extends, pushing out the corresponding vacuum chamber 4 and nitrogen chamber 5. Pressing the release button 9 again pulls the corresponding vacuum chamber 4 and nitrogen chamber 5 back, and the electromagnetic lock automatically locks. The push-pull mechanism can be a telescopic component, such as an electric telescopic cylinder or a scissor-type telescopic mechanism, to achieve automatic opening and closing of the vacuum chamber 4 and nitrogen chamber 5. The travel distance of the push-pull mechanism needs to be preset and can be limited by a stop switch.

[0043] In one embodiment of this invention, the cabinet 1 further includes an equipment area, within which is an equipment compartment 6. The equipment compartment 6 contains a vacuum machine 10 and a nitrogen supply device. The vacuum machine 10 is connected to the vacuum chamber 4 via a vacuum pipeline 14, the inlet end of which is equipped with a vacuum valve 15. The nitrogen supply device is connected to the nitrogen chamber 5 via a nitrogen pipeline 16, on which a nitrogen valve 18 is installed. The nitrogen chamber 5 is connected to the outside via a replacement pipeline 19, which is equipped with a replacement valve 20.

[0044] By turning on the vacuum machine 10 and the vacuum valve 15, the vacuum chamber 4 can be evacuated to provide a vacuum environment. At the same time, the air is extracted during the evacuation process, thus achieving a pre-dehumidification effect. After the evacuation is completed, the vacuum machine 10 and the vacuum valve 15 can be turned off.

[0045] Turn on the nitrogen supply equipment, nitrogen valve 18, and replacement valve 20. Nitrogen will enter the nitrogen chamber 5 (storage room) through nitrogen pipeline 16. At the same time, the air in the nitrogen chamber 5 (storage room) will be displaced and discharged through nitrogen pipeline 16, completing the nitrogen replacement and providing a nitrogen environment for the nitrogen chamber 5 (storage room). After the nitrogen replacement is complete, the nitrogen supply equipment, nitrogen valve 18, and replacement valve 20 can be turned off. During the nitrogen replacement process, air is gradually discharged, and moisture is subsequently discharged, achieving a pre-dehumidification effect.

[0046] In one embodiment of this example, each nitrogen chamber 5 is further provided with a multi-point nitrogen nozzle 17, and the nitrogen pipeline 16 is connected to the multi-point nitrogen nozzle 17 to achieve uniform exhaust.

[0047] In one embodiment of this invention, the nitrogen supply equipment includes a nitrogen generator 11 and / or a nitrogen cylinder 12. This can be implemented in three different ways: The first type consists of only a nitrogen cylinder 12. The nitrogen cylinder 12 supplies nitrogen to the nitrogen chamber 5 through the nitrogen pipeline 16. However, since the nitrogen chamber 5 needs to be replenished, the nitrogen needs to be replaced after each replenishment. This will cause the nitrogen in the nitrogen cylinder 12 to be continuously depleted. Once the nitrogen in the nitrogen cylinder 12 is used up, it cannot be replenished, so the nitrogen cylinder 12 needs to be replaced, which is cumbersome. Moreover, as the nitrogen is consumed, the pressure in the nitrogen cylinder 12 may become insufficient, making it impossible to expel the air from the nitrogen chamber 5. The second type is a nitrogen generator 11. The nitrogen generator 11 can directly supply nitrogen to the nitrogen chamber 5 through the nitrogen pipeline 16. However, the nitrogen generator 11 produces nitrogen slowly, and the nitrogen environment is formed slowly. It is also prone to problems such as nitrogen being discharged with the air due to slow nitrogen replenishment, resulting in the inability to complete the replacement. The third type involves both a nitrogen cylinder 12 and a nitrogen generator 11. The nitrogen cylinder 12 supplies nitrogen to the nitrogen chamber 5 via a nitrogen pipeline 16, while the nitrogen generator 11 replenishes nitrogen to the nitrogen cylinder 12 via a replenishment pipeline. When the nitrogen level in the nitrogen cylinder 12 drops to a certain point, the nitrogen generator 11 replenishes the cylinder. The replenishment pipeline is equipped with a replenishment valve; when replenishment is needed, the replenishment valve is opened, while the nitrogen valve 18 is closed. This third type has significant advantages over the first two types, as it avoids the problems of insufficient nitrogen for replacement and slow nitrogen generation for replacement. Preferably, a pressure sensor can be installed inside the nitrogen cylinder 12. When the pressure inside the nitrogen cylinder 12 drops to a preset pressure, the nitrogen generator 11 can automatically start replenishing nitrogen.

[0048] In one embodiment of this example, the nitrogen generator 11 uses a carbon molecular sieve nitrogen generator. The nitrogen purity must be >99.95%.

[0049] In one embodiment of this invention, a vacuum level sensor is installed inside the vacuum chamber 4. This sensor monitors the vacuum level inside the chamber 4 in real time, providing a reference for when the vacuum machine 10 should be shut down during the vacuuming process. It also allows for timely activation of the vacuum machine 10 to perform vacuuming when insufficient vacuum is detected. The nitrogen chamber 5 is equipped with both an oxygen concentration sensor and a nitrogen concentration sensor. These sensors monitor the nitrogen and oxygen concentrations inside the chamber 5 in real time, respectively. Combining this comprehensive information provides a reference for determining when the nitrogen replacement process is complete. Furthermore, if the nitrogen concentration is insufficient or the oxygen concentration exceeds the standard, nitrogen replacement is performed again to ensure the nitrogen environment inside the chamber 5 remains at a compliant level. The combined information of nitrogen and oxygen concentrations is used because there may be situations where the nitrogen concentration meets the standard but the oxygen concentration exceeds it; therefore, both nitrogen and oxygen concentrations must meet the standards for a qualified nitrogen environment. Specifically: When the vacuum level detected by the vacuum level sensor is less than the set vacuum level, the vacuum valve 15 opens and the vacuum machine 10 is started to perform vacuum treatment in the vacuum chamber 4. When the vacuum environment in the vacuum chamber 4 reaches the set vacuum level, the vacuum machine 10 stops working and the vacuum valve 15 is closed. When the oxygen concentration detected by the oxygen concentration sensor is less than the set oxygen concentration, and the nitrogen concentration detected by the nitrogen concentration sensor is less than the set nitrogen concentration, the nitrogen valve 18 and the replacement valve 20 open and the nitrogen supply equipment is started to replace the nitrogen in the nitrogen chamber 5 with nitrogen. When the environment in the nitrogen chamber 5 reaches the set nitrogen and oxygen concentrations simultaneously, the nitrogen supply equipment stops working and the nitrogen valve 18 and the replacement valve 20 are closed.

[0050] In one embodiment of this example, the vacuum zone, nitrogen zone, and equipment zone are arranged sequentially from top to bottom. Specifically, the vacuum chamber 4 is located at the top of the cabinet 1. The nitrogen chamber 5 is located in the middle of the cabinet 1, facilitating the use of the receiving cup 21 to collect grains or cooking oil. The equipment chamber 6 is located at the bottom of the cabinet 1, facilitating equipment maintenance and replacement. Preferably, the vacuum chamber 4 is mainly used to store noodles or tea, which need to be placed in their original packaging. The nitrogen chamber 5 is mainly used to store rice, grains, beans, dried fruits, or cooking oil, which need to be stored in bulk within the nitrogen chamber 5.

[0051] In one embodiment of this invention, both the vacuum chamber 4 and the nitrogen chamber 5 are equipped with sterilization and insect repellent devices. A vacuum or nitrogen environment alone may not be sufficient for sterilization and insect repellent effects; therefore, the addition of sterilization and insect repellent devices can further enhance these effects, preventing pest infestation and achieving the goal of preservation. The sterilization and insect repellent devices can be manually activated or automatically activated periodically.

[0052] In one embodiment of this invention, the sterilization and insect repellent equipment includes an ultraviolet (UV) sterilization lamp and an ultrasonic insect repellent. The UV sterilization lamp is primarily responsible for sterilization, while the ultrasonic insect repellent is primarily responsible for insect repellent. Specifically, the ultrasonic insect repellent works by emitting 22kHz sound waves to repel weevils and similar pests. The UV sterilization lamp works by using ultraviolet light (UV) light, which has a wavelength between 100 nanometers (nm) and 400 nanometers, falling between visible light and X-rays. Based on wavelength, it is divided into UVA, UVB, and UVC. The energy of UVC photons can be absorbed by the DNA and RNA of microorganisms (such as bacteria, viruses, and fungi). After absorption, it damages their nucleic acid structure, mainly by forming thymine dimers, preventing the normal replication and protein synthesis of the microorganism's genetic material, thus leading to their death or loss of activity. The UV sterilization lamp is preferably an ozone-free type.

[0053] After conducting multiple investigations into residents' grain and oil storage practices and drawing on practical experience in rural areas, it was learned that even with well-packaged containers, insects or moths still appear in grains every summer. This is because insect eggs attach to the grain surface, and under suitable temperature and humidity conditions, larvae develop, eventually leading to moths. Therefore, the purpose of this cold storage cabinet is to kill insect eggs or prevent them from developing into adult insects. To this end, this cold storage cabinet employs two or three measures: First, when the grain is poured into the nitrogen chamber 5, it is spread out using a conveyor system, and an ultraviolet sterilization lamp can be installed at the inlet on the top of the nitrogen chamber 5 to disinfect any existing insect eggs. Second, after the grain is poured in, it undergoes a temperature- and time-controlled low-temperature treatment to disinfect the insect eggs a second time. Third, for long-term storage, nitrogen filling is used to isolate the conditions necessary for insect egg survival. In short, through these multiple measures, the aim is to prevent insect eggs from surviving and developing into larvae or moths, thus maintaining the freshness of the grains to the greatest extent possible.

[0054] In one embodiment of this invention, the temperature and humidity control system includes a temperature sensor, a humidity sensor, and a cooling and heating device. The temperature and humidity sensors monitor the temperature and humidity inside the vacuum chamber 4 and the nitrogen chamber 5 (storage room). The cooling and heating device is responsible for temperature adjustment and dehumidification, ensuring that the vacuum chamber 4 and the nitrogen chamber 5 (storage room) are maintained at the indicated temperature and humidity.

[0055] In one embodiment of this invention, the cooling and heating device includes a thermoelectric cooler and a PTC heater, with a water collection tank located below the thermoelectric cooler. The water collection tank collects water droplets condensing on the thermoelectric cooler and falling during cooling. The thermoelectric cooler can perform both cooling and heating. Specifically, the thermoelectric cooler has a cold end and a hot end. The cold end of the thermoelectric cooler is located inside the vacuum chamber 4 and the nitrogen chamber 5, while the hot end is located outside the vacuum chamber 4 and the nitrogen chamber 5. When a forward voltage is applied, the cold end of the thermoelectric cooler absorbs heat, and the hot end dissipates heat; when a reverse voltage is applied, the hot end of the thermoelectric cooler becomes the cold end and absorbs heat, and the cold end becomes the hot end and releases heat. Thus, the thermoelectric cooler can achieve both cooling and heating functions for the vacuum chamber 4 and the nitrogen chamber 5. The PTC heater, also called a PTC heating element, is composed of a PTC ceramic heating element and an aluminum tube. PTC stands for Positive Temperature Coefficient. PTC heaters offer advantages such as low thermal resistance and high heat exchange efficiency, making them an automatic, temperature-controlled, and energy-saving electric heater. A key feature is their safety performance; unlike electric heating tube heaters, they do not exhibit surface "red-hot" phenomena under any application, thus avoiding burns, fires, and other safety hazards. Furthermore, their heating efficiency and power are greater than those of thermoelectric coolers. Therefore, PTC heaters are used for rapid heating or dehumidification, either in conjunction with or sequentially with thermoelectric coolers. The thermoelectric cooler is used for normal heating or cooling, and can also be used for dehumidification during cooling. When the cold end is cooled, moisture in the air condenses on the cold end, forming water droplets that fall into a collection tank under gravity, achieving dehumidification.

[0056] In one embodiment of this invention, a water storage tank is located at the rear of the cabinet 1, and a drain pipe is provided at the bottom of the water collection trough, which is connected to the water storage tank to promptly drain water from the collection trough into the water storage tank. Preferably, the bottom of the water collection trough can be sloped, and a drain outlet is provided at the bottom of the sloped bottom, which is connected to the drain pipe. The water storage tank is positioned lower than the water collection trough in terms of height.

[0057] In one embodiment of this invention, a condensation surface or heat dissipation fins can be provided on the cold end of the thermoelectric cooler to facilitate the condensation of moisture in the air into water droplets. A cooling fan can be provided on the hot end of the thermoelectric cooler to achieve rapid heat dissipation.

[0058] In one embodiment of this invention, the refrigeration and heating equipment includes temperature control and humidity control. Temperature control includes a cooling mode and a heating mode, and humidity control includes a condensation dehumidification mode and a reheat dehumidification mode. If the detected temperature exceeds the set temperature, the cooling mode is activated. When a positive voltage is applied to the thermoelectric cooler, the cold end of the thermoelectric cooler begins to absorb heat from the surrounding environment, thus cooling down, while the hot end dissipates heat, expelling the heat generated at the hot end to the outside. Once the ambient temperature reaches the set temperature, if a cooling fan is installed at the hot end, the cooling fan is activated to quickly expel heat to the outside, preventing the thermoelectric cooler from being damaged by overheating and causing a sharp drop in efficiency. When the temperature detected by the temperature sensor is lower than the set temperature, the heating mode is activated. The heating mode includes three strategies: Normal heating strategy: When a reverse voltage is applied to the thermoelectric cooler, the hot end of the thermoelectric cooler becomes the cold end to absorb heat, and the cold end becomes the hot end to release heat. Once the ambient temperature reaches the set temperature, the voltage applied to the thermoelectric cooler is stopped, and the thermoelectric cooler stops working. Rapid heating strategy: The PTC heater is activated to heat the ambient temperature. Once the ambient temperature reaches the set temperature, the PTC heater is turned off. This method is simple and direct, with a fast response, but its energy efficiency is relatively low. It is typically used for low-power applications or applications requiring rapid temperature rise.

[0059] Precise heating strategy: First, start the PTC heater for heating (high-power heating). When the ambient temperature approaches the set temperature, stop the PTC heater and switch to the semiconductor cooling chip for heating (low-power heating) to achieve precise adjustment. When the ambient temperature reaches the set temperature, the semiconductor cooling chip stops working. When the humidity sensor detects a humidity level higher than the set humidity level, humidity control is activated. Humidity control includes two modes: Condensation dehumidification mode: A positive voltage is applied to the thermoelectric cooler, causing the temperature of the cold end of the thermoelectric cooler to drop to the water vapor condensation temperature, so that the moisture in the surrounding environment condenses into water droplets on the cold end of the thermoelectric cooler. At the same time, the PTC heater is activated to perform heating compensation to keep the ambient temperature constant at the set temperature. Once the ambient temperature reaches the set humidity, the thermoelectric cooler and the PTC heater stop working. Heating and dehumidifying mode: The PTC heater is activated to dry the surrounding environment. Once the set humidity level is reached, the PTC heater stops working.

[0060] The heating dehumidification mode is suitable for when there is heat-resistant food in the vacuum chamber 4 or nitrogen chamber 5, or when there is no food in the vacuum chamber 4 or nitrogen chamber 5. The heating dehumidification mode is used first to achieve rapid dehumidification, and after the food is put in, the condensation dehumidification mode is used for normal dehumidification.

[0061] Under the monitoring of temperature and humidity sensors, it can automatically decide which working mode to activate in order to maintain the temperature and humidity in vacuum chamber 4 and nitrogen chamber 5 at the set temperature and target humidity.

[0062] In one embodiment of this invention, both the vacuum chamber 4 and the nitrogen chamber 5 are equipped with weighing devices for quantifying the contents stored in the vacuum chamber 4 and the nitrogen chamber 5. For example, an electronic scale is installed at the bottom of the vacuum chamber 4 and the nitrogen chamber 5.

[0063] In one embodiment of this invention, part or all of the nitrogen chamber 5 is equipped with a stirring mechanism for agitating bulk stored materials (such as rice or cooking oil). This mechanism agitates the bulk stored materials from the bottom to the top, from the top to the bottom, from the inner layer to the outer layer, and from the outer layer to the inner layer. This ensures uniform heating of the bulk stored materials within the nitrogen chamber 5, preventing imbalances such as top-hot-bottom-cool, outside-hot-inside-cool, or top-cool-inside-hot, outside-cool-inside-hot, top-wet-bottom-dry, outside-wet-inside-dry, or top-dry-bottom-wet, or outside-dry-inside-wet, etc., thus ensuring consistent temperature and humidity conditions across all areas of the bulk stored materials. Furthermore, the agitation process ensures effective sterilization and insect repellent in all areas of the bulk stored materials, preventing inadequate sterilization and insect repellent. The stirring mechanism can be set to perform periodic agitation.

[0064] In one embodiment of this example, the stirring mechanism employs both stirring and turning methods, which can periodically stir and turn the rice or grains and oils, exposing the deeper layers of rice and grains and oils to the surface. This avoids the problem that, due to the thick accumulation of rice, the surface temperature of the rice pile is within acceptable limits (matching the regulated ambient temperature), while the internal temperature is either too high or too low (not matching the regulated ambient temperature).

[0065] In one embodiment of this invention, the nitrogen chamber 5 includes a storage chamber 22 and an installation chamber 23, with the installation chamber 23 located below the storage chamber 22. The stirring mechanism includes a spiral stirring mechanism and a drive mechanism. The spiral stirring mechanism is located within the storage chamber 22 of the nitrogen chamber 5, and the drive mechanism is installed within the installation chamber 23 of the nitrogen chamber 5. The spiral stirring mechanism includes a stirring shaft 31 and spiral blades 32. The spiral blades 32 are disposed on the stirring shaft 31 and spirally wound along the axial direction of the stirring shaft 31. The stirring shaft 31 is rotatably connected within the storage chamber 22. The axial direction of the stirring shaft 31 is vertically positioned within the storage chamber 22. The drive mechanism includes a drive motor 29 and a drive gear set 30. The drive gear set 30 typically includes a driving gear and a driven gear. The drive motor 29 is installed within the installation chamber 23, and the motor shaft of the drive motor 29 is coaxially and fixedly connected to the driving gear. The driving gear and the driven gear mesh with each other, and the driven gear is rotatably connected within the installation chamber 23. The driven gear is coaxially and fixedly connected to the stirring shaft 31. The rotation of the motor shaft of the drive motor 29 drives the drive gear to rotate, which in turn drives the stirring shaft 31 to rotate via the driven gear, causing the spiral blades 32 to rotate. This stirs and lifts the material in the storage chamber 22, achieving the effects of stirring and tumbling. Typically, the driven gear has more teeth than the drive gear, thus acting as a reduction gear.

[0066] In one embodiment of this invention, the nitrogen chamber 5 further includes a discharge chamber 24. The installation chamber 23 and the discharge chamber 24 are arranged side-by-side below the storage chamber 22. The discharge valve includes an opening / closing plate 27, a discharge port 25, and a feeding port 26. The discharge port 25 is located on the top wall of the discharge chamber 24 and communicates with the storage chamber 22. A sliding groove 28 is provided on the side wall of the discharge chamber 24, and the opening / closing plate 27 is slidably connected to the sliding groove 28. The feeding port 26 is located on the opening / closing plate 27. A discharge button 8 and a retrieval window 7 are located on the outer wall of the discharge chamber 24. An active telescopic rod 33 is provided between the discharge chamber 24 and the discharge button 8. The active telescopic rod 33 is preferably an electric telescopic rod. After pressing the discharge button 8, the active telescopic rod 33 shortens, pulling the opening / closing plate 27 inward, causing the feeding port 26 and the discharge port 25 to overlap, thus opening the discharge port 25. When the preset discharge time is reached, the active telescopic rod 33 will extend and push the opening and closing plate 27 outward, so that the feeding port 26 and the discharge port 25 are staggered. The opening and closing plate 27 will cover the discharge port 25, thus closing the discharge port 25.

[0067] In one embodiment of this invention, the cabinet 1 is equipped with a cabinet door 2, and the cabinet door 2 is equipped with a touch screen 3. The touch screen 3 is used to display various information and for operation. The displayed information includes, for example, temperature, humidity, vacuum level, nitrogen content, oxygen content, storage time, weight display, fault alarm, time reminder, and stirring interval, etc. Operation can be divided into several preset modes, such as drying mode, preservation mode, and dormancy mode. In preservation mode, the set temperature and target humidity can be customized. In dormancy mode, the dormancy time and dormancy interval can be customized. Dormancy mode is mainly suitable for long-term seed storage.

[0068] In one embodiment of this example, a power supply 13 is also provided in the equipment compartment 6 of the cabinet 1.

[0069] In one embodiment of this example, a central controller is also provided on the cabinet 1. The central controller is used to coordinate and control the above-mentioned devices, including but not limited to collecting and processing monitoring information from various sensors, input information from the touch screen 3, weighing information from the weighing device, and output signals from various buttons, issuing instructions to various valves, temperature and humidity control systems, and sterilization and insect repellent equipment, and displaying information on the touch screen 3, etc.

[0070] In one embodiment of this invention, the central controller has a built-in network module, allowing users to remotely control various functions of the refrigerated storage cabinet via a mobile app. Users can also set intelligent reminders, such as prompting them to regularly check food levels, alerting them when food is nearing its expiration date, and regularly cleaning the water tank. A liquid level detection device can also be installed in the water tank to remind users to clean it regularly when a preset water level is reached. These reminders can also be displayed simultaneously on the touchscreen 3.

[0071] In one embodiment of this example, cabinet door 2 may be a single door or a double door.

[0072] In one embodiment of this invention, a portion of the nitrogen chamber 5 within the nitrogen zone can also be used for medicine storage. This adds a medicine storage function to the refrigerated storage cabinet, enabling intelligent and visualized medicine storage. The nitrogen chamber 5 used for medicine storage can also be equipped with a QR code reader. When medicine is placed inside, the QR code is scanned to record usage and storage information such as the name and expiration date of the stored medicine. A mobile app can be developed to send the medicine storage information to the user's phone via Wi-Fi, achieving intelligent storage. The nitrogen chamber 5 used for medicine storage may not have a stirring mechanism.

[0073] In one embodiment of this example, the nitrogen chamber 5 in the nitrogen zone is divided into a medicine storage chamber, a rice storage chamber, a bean storage chamber, and an edible oil storage chamber. At least the medicine storage chamber does not have a stirring mechanism, while the rice storage chamber, bean storage chamber, and edible oil storage chamber may or may not have stirring mechanisms.

[0074] The main principles for storing medicines are: first, protection from light, coolness, and dryness; second, categorization, as not all medicines are suitable for refrigeration. If a medicine is not labeled "cool place (≤20℃)" or "refrigerated (2℃~8℃)," then room temperature protection from light is sufficient. However, unopened insulin, some live bacteria preparations (such as Bifidobacterium), and eye drops (specifically labeled) must be refrigerated. Syrups (which are prone to crystallization and inaccurate dosages when refrigerated), plasters, powders, and some capsules are prohibited from refrigeration. Therefore, automatic categorization and storage are achieved through information entry. A "post-opening" timeline is established: the automatic control system records the time the medicine is opened and automatically sends medicine usage information to a mobile app.

[0075] To ensure safety, the nitrogen chamber 5 for storing medicines can be equipped with physical isolation and a "child lock".

[0076] In one embodiment of this example, the length, width, and height of the food storage cabinet can be referenced from the dimensions of a commonly used household refrigerator. The height of the food storage cabinet can also be set according to the average height of men and women in real life, for example, it can be set to 1700mm~1900mm to meet the needs of most men and women. Of course, these parameters are for reference only and can be adjusted according to specific needs; they are not limited to these values.

[0077] In one embodiment of this example, a voice recognition and broadcasting module can also be added to the cabinet 1. The voice recognition and broadcasting module is electrically connected to the central controller. The central controller has built-in artificial intelligence control software. Through the central control and the voice recognition and broadcasting module, it can communicate with the user by voice and broadcast various information about the stored items, such as the type of items, storage time, expiration time, etc., which can meet the needs of people who cannot operate the touch screen 3, are inconvenient to operate the touch screen 3, or do not want to operate the touch screen 3.

[0078] In one embodiment of this example, a specific experimental example is provided as a preparation reference: ① Cabinet 1 has a height of 1700mm~1900mm, a width of 600mm, and a thickness of 400mm. The material of cabinet 1 can be set according to needs, such as metal, plastic, etc., for example, food-grade stainless steel.

[0079] ② The top of cabinet 1 is a vacuum zone, containing four drawer-type vacuum chambers 4 arranged in two rows and two columns. Each vacuum chamber 4 is 200mm high, 300mm wide, and has a volume of 5L. The material of the vacuum chambers 4 can be chosen according to needs, such as metal, plastic, etc., for example, food-grade stainless steel. The vacuum chambers 4 are sealed to cabinet 1 when closed using silicone airtight rings. The vacuum tubing 14 uses pressure-resistant nylon flexible tubing.

[0080] ③ The central part of cabinet 1 is the nitrogen storage area, containing six drawer-type nitrogen chambers 5. These chambers are arranged in two rows and three columns. Each chamber 5 is 300mm high, 200mm wide, and has a volume of 5L. The material of the nitrogen chambers 5 can be chosen according to need, such as metal, plastic, or, for example, food-grade stainless steel. The nitrogen chambers 5 are sealed to cabinet 1 when closed using silicone gaskets. The nitrogen pipeline 16 uses a pressure-resistant nylon flexible hose. The replacement pipeline 19 uses a stainless steel pipe.

[0081] ④ The electrical interface on cabinet 1 uses aviation plugs.

[0082] ⑤ The design parameters for power supply 13 are as follows: Voltage: Input AC220V, Output: DC24V / DC12V / DC5V; Power: 850W; Features: Wide voltage input, three-level protection against leakage, short circuit and overcurrent.

[0083] ⑥ The design parameters of nitrogen generator 11 are as follows: Flow rate: 0 ml / min ~ 500 ml / min; Power: 150W; Size: L W H=400mm 250mm 350mm; Characteristics: Filled with carbon molecular sieve, purity > 99.95%.

[0084] ⑦ The design parameters of vacuum machine 10 are as follows: Vacuum level: -88 kPa; Air flow rate: 50L / min; Power: 120W; Size: L W H=185mm 93mm 144mm.

[0085] ⑧ Control system: The system adopts an integrated touch screen controller, which is an integrated controller that combines the touch screen 3 and the central controller.

[0086] Temperature control loop: ten channels; Humidity control loop: ten channels; Vacuum control loop: two paths; Nitrogen / Oxygen Concentration Control Loop: Eight-channel; Time control loop: four channels; Automatic time synchronization function: Turn on Bluetooth, connect to your phone, and automatically synchronize the time; Backup extended control loops: four; Communication functions: WIFI, Bluetooth, Modbus communication protocol.

[0087] Touchscreen 3-mode settings:

[0088] Touchscreen 3 parameter settings: Nitrogen concentration: 78%~99.97%; Oxygen concentration: 0%~21%; Vacuum degree: -88Kpa~0; Timer: 0h~24h / 0d~365d; Display parameters: The screen on the touch screen 3 can be set to display the compartment number, corresponding temperature and humidity, nitrogen concentration, oxygen concentration, storage time, weight display, fault alarm, and time reminder.

[0089] in: Drying mode, freshness preservation mode, and hibernation mode can be intelligently and dynamically switched based on the type of stored goods, their initial state, and real-time status monitoring results. Real-time status monitoring is achieved by using temperature and humidity sensors, pressure sensors, and gas detection sensors within the freshness storage cabinet to record various status parameters in real time and input them into the controller for control and display. Furthermore, mode switching and selection are handled in two ways: Manual selection: The controller has preset various grains and oils to the maximum extent. It has classified settings for storage conditions of various grains and oils, dormancy characteristics of seeds, etc. In the mode screen that pops up on the touch screen, the user can select the appropriate mode according to the grains stored in each drawer. Intelligent dynamic switching: The selected drying, preservation, and dormancy modes are not set in stone. The intelligent monitoring system can intelligently and dynamically switch modes through real-time online monitoring and in conjunction with an automatic clock.

[0090] This food storage cabinet integrates three core functions: nitrogen vacuum preservation, dual temperature and humidity control, and insect and mold prevention. It enables the scientific storage of grains and oils to ensure food safety. It reduces the health risks posed by improper food storage. This is a home-use intelligent nitrogen grain storage system with self-generated nitrogen protection, adjustable humidity and temperature, light-controlled irradiation, and antibacterial and sterilization capabilities.

[0091] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A food storage cabinet, characterized in that, Includes a cabinet (1), which has at least a vacuum zone and a nitrogen zone. The vacuum zone has at least one vacuum chamber (4) that can be opened and closed. The vacuum chamber (4) can be in a vacuum environment when closed. The nitrogen zone has at least one nitrogen chamber (5) that can be opened and closed. The nitrogen chamber (5) can be in a nitrogen environment when closed. Both the vacuum chamber (4) and the nitrogen chamber (5) are equipped with a temperature and humidity control system.

2. The food preservation storage cabinet according to claim 1, characterized in that, The nitrogen chamber (5) includes a storage chamber and a retrieval chamber that are independent of each other. The retrieval chamber is located below the storage chamber. The outer wall of the retrieval chamber is provided with a retrieval window (7). The bottom wall of the storage chamber is provided with a discharge valve that communicates with the storage chamber. The discharge valve responds to a switch signal and performs opening and closing actions.

3. The food preservation storage cabinet according to claim 2, characterized in that, Both the vacuum chamber (4) and the nitrogen chamber (5) are drawer-type storage chambers.

4. The food preservation storage cabinet according to claim 3, characterized in that, Electromagnetic locks are provided between the vacuum chamber (4) and the nitrogen chamber (5) and the cabinet (1). The electromagnetic locks respond to the electromagnetic lock switch signal to open and close the electromagnetic locks.

5. The food preservation storage cabinet according to claim 1, characterized in that, The cabinet (1) is also provided with an equipment area, which is provided with an equipment compartment (6). The equipment compartment (6) is provided with a vacuum machine (10) and a nitrogen supply device. The vacuum machine (10) is connected to the vacuum chamber (4) through a vacuum pipeline (14). The vacuum pipeline (14) is provided with a vacuum valve (15). The nitrogen supply device is connected to the nitrogen chamber (5) through a nitrogen pipeline (16). The nitrogen pipeline (16) is provided with a nitrogen valve (18). The nitrogen chamber (5) is provided with a replacement pipeline (19) connected to the outside. The replacement pipeline (19) is provided with a replacement valve (20).

6. The food preservation storage cabinet according to claim 5, characterized in that, The vacuum chamber (4) is equipped with a vacuum degree detection sensor; the nitrogen chamber (5) is equipped with an oxygen concentration detection sensor and a nitrogen concentration detection sensor. When the vacuum level detected by the vacuum level sensor is less than the set vacuum level, the vacuum valve (15) is opened and the vacuum machine (10) is started to perform vacuum treatment in the vacuum chamber (4). When the vacuum environment in the vacuum chamber (4) reaches the set vacuum level, the vacuum machine (10) stops working and the vacuum valve (15) is closed. When the oxygen concentration detected by the oxygen concentration sensor is less than the set oxygen concentration, and the nitrogen concentration detected by the nitrogen concentration sensor is less than the set nitrogen concentration, the nitrogen valve (18) and the replacement valve (20) are opened, and the nitrogen supply equipment is started to replace the nitrogen in the nitrogen chamber (5). When the environment in the nitrogen chamber (5) reaches the set nitrogen concentration and oxygen concentration at the same time, the nitrogen supply equipment stops working and the nitrogen valve (18) and the replacement valve (20) are closed.

7. The food preservation storage cabinet according to claim 5, characterized in that, The vacuum zone, the nitrogen zone, and the equipment zone are arranged sequentially from top to bottom.

8. The food preservation storage cabinet according to claim 1, characterized in that, Both the vacuum chamber (4) and the nitrogen chamber (5) are equipped with sterilization and insect repellent devices.

9. The food preservation storage cabinet according to claim 8, characterized in that, The sterilization and insect repellent equipment includes an ultraviolet sterilization lamp and an ultrasonic insect repellent.

10. The food preservation storage cabinet according to claim 1, characterized in that, The temperature and humidity control system includes a temperature sensor, a humidity sensor, and refrigeration and heating equipment.

11. The food preservation storage cabinet according to claim 10, characterized in that, The cooling and heating equipment includes a semiconductor cooling chip and a PTC heater, with a water collection tank located below the semiconductor cooling chip.

12. The food preservation storage cabinet according to claim 11, characterized in that, A water storage tank is provided at the rear of the cabinet (1), and a drain pipe connected to the water storage tank is provided at the bottom of the water collection tank.

13. The food preservation storage cabinet according to claim 11, characterized in that, The refrigeration and heating equipment includes temperature control and humidity control. Temperature control includes a refrigeration mode and a heating mode, and humidity control includes a condensation dehumidification mode and a reheat dehumidification mode. When the temperature detected by the temperature sensor is higher than the set temperature, the cooling mode is activated. When a positive voltage is applied to the thermoelectric cooler, the cold end of the thermoelectric cooler begins to absorb heat from the surrounding environment to achieve cooling, while the hot end dissipates heat to the outside. Once the ambient temperature reaches the set temperature, the thermoelectric cooler stops working. When the temperature detected by the temperature sensor is lower than the set temperature, the heating mode is activated. The heating mode includes three strategies: Normal heating strategy: When a reverse voltage is applied to the thermoelectric cooler, the hot end of the thermoelectric cooler becomes the cold end to absorb heat, and the cold end becomes the hot end to release heat. Once the ambient temperature reaches the set temperature, the thermoelectric cooler stops working. Rapid heating strategy: The PTC heater is activated to heat the ambient temperature. Once the ambient temperature reaches the set temperature, the PTC heater stops working. Precise heating strategy: First, start the PTC heater to heat. When the ambient temperature approaches the set temperature, switch to the semiconductor cooling chip for heating. When the ambient temperature reaches the set temperature, the semiconductor cooling chip stops working. When the humidity sensor detects a humidity level higher than the set humidity level, humidity control is activated. Humidity control includes two modes: Condensation dehumidification mode: A positive voltage is applied to the thermoelectric cooler, and the temperature of the cold end of the thermoelectric cooler drops to the water vapor condensation temperature, so that the moisture in the surrounding environment condenses into water droplets on the cold end of the thermoelectric cooler. At the same time, the PTC heater is activated to perform heating compensation to keep the ambient temperature constant at the set temperature. Once the ambient temperature reaches the set humidity, the thermoelectric cooler and the PTC heater stop working. Heating and dehumidifying mode: The PTC heater is activated to heat and dry the surrounding environment until the set humidity is reached.

14. The food preservation storage cabinet according to claim 1, characterized in that, The vacuum chamber (4) and the nitrogen chamber (5) are equipped with weighing devices for quantifying the stored materials.

15. The food preservation storage cabinet according to claim 1, characterized in that, Some or all of the nitrogen chambers (5) are equipped with a stirring mechanism for turning over bulk stored materials.

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