40 results about "High oxygen" patented technology

The invention discloses a molecular film type automotive nitrogen and oxygen separation device which comprises a turbocharger, a nitrogen and oxygen separator, a gas inlet valve, a gas outlet valve, a negative pressure pump and an electric control throttling valve. The turbocharger is driven by a turbine in an automobile turbocharger, so that the air is compressed to be conveyed to two paths of the nitrogen and oxygen separation device, the nitrogen and oxygen separation device can separate oxygen from the air, the air with high oxygen content is output, and the air is supplied to an engine for use through the gas outlet valve. The two paths of the nitrogen and oxygen separation device work alternately, when the temperature of the two paths of the nitrogen and oxygen separation device is too high to influence oxygen production efficiency, a main air inlet pipeline is opened to provide air normally by controlling the opening degree of the electric control throttling valve, and thus the phenomena of gas circuit plugging and engine stalling are avoided. According to the automotive nitrogen and oxygen separation device, the two branch paths work alternately, high concentration oxygen can be supplied to the engine continuously so that fuel can burn and act, and the burning utilization rate of the fuel is improved.

Existing pulse oximeters have impaired accuracy in measuring blood oxygen levels (SpO2) in patients of color, where the presence of melanin in the skin tends to interfere with measurements of pulse oximetry, resulting in an overestimation of SpO2. Thus, the pulse oximeter often reports a higher oxygen saturation for patients with darker skin tones, often with increasing bias as the actual saturation (SaO2) decreases. This bias is further reinforced by calibration based on individuals with light skin pigmentation, which may lead to inequitable healthcare for patients of color. Our proposed solution is to modify current pulse oximetry calculations—which utilize the relative tissue absorbance of red and infrared light to estimate SpO2—to account for the concentration of melanin by additionally measuring the skin absorbance of UV˜A light. This derived concentration of melanin can then be used to modify the pulse oximetry algorithm output, thus estimating SpO2 more accurately for patients of color.

The invention relates to the technical field of ferrite single-crystal materials, in particular to a treatment method for improving the ferromagnetic resonance line width of spinel NiZn ferrite single-crystal pellets, which comprises the following steps: annealing the spinel NiZn ferrite single-crystal pellets under the conditions of high oxygen pressure and high temperature, slowly cooling to room temperature, and releasing the pressure after the annealing is finished, thereby obtaining the spinel NiZn ferrite single-crystal pellets. According to the method, the NiZn ferrite single crystal pellets are subjected to annealing treatment by adopting a high-oxygen-pressure high-temperature annealing treatment process, the pellet processing stress can be released under the condition of inhibiting Zn element volatilization, the ferromagnetic resonance line width of the NiZn ferrite single crystal pellets can be effectively reduced, and subsequent pellet surface polishing treatment is also facilitated.

The invention relates to the technical field of solid oxide electrolytic cells, in particular to an A-site high-entropy perovskite oxide with oxygen octahedron distortion and a preparation method and application thereof. The chemical formula of the oxide is Nd < 0.2 > Pr < 0.2 > La < 0.2 > Ba < 0.2 > Sr < 0.2 > CoO < 3-delta >, wherein delta is the oxygen vacancy content. The oxide has lattice oxygen after being subjected to high entropy, so that oxygen ions move more easily, the oxygen evolution reaction activity is improved, meanwhile, the local environment of the oxygen ions is changed after high entropy, local oxygen octahedral distortion occurs, the oxygen ions are more active, the oxygen migration rate is further increased, the high oxygen evolution reaction activity is shown, and the oxygen evolution reaction activity is improved. Therefore, the yield of cathode carbon monoxide is improved.

The application discloses an air inlet and outlet valve for an oxygen generator, which comprises a fixed valve plate and a movable valve plate, the end face of the fixed valve plate facing the movable valve plate is a fixed end face, the end face of the movable valve plate facing the fixed valve plate is a movable end face, the fixed end face and the movable end face are in contact and sealed, the movable end face is further provided with oxygen conveying grooves which are always in communication with oxygen guide grooves, the oxygen conveying grooves are sequentially communicated with oxygen guide holes when the movable valve plate moves, the oxygen conveying grooves are provided with two, one of the oxygen conveying grooves is simultaneously communicated with an air guide groove and a molecular tower when the movable valve plate moves, the molecular tower realizes air inlet and oxygen outlet, the other oxygen conveying groove is simultaneously communicated with a nitrogen outlet groove and another molecular tower, the other molecular tower realizes nitrogen outlet and oxygen back flushing, and the air inlet and outlet valve for the oxygen generator has the advantages of simple structure, good sealing effect, complete nitrogen analysis, high oxygen production capacity and efficiency and long service life.

The embodiment of the invention provides a monitoring cabin which comprises a containing cabin and an oxygen supply system, and the oxygen supply system comprises a first oxygen conveying assembly and a second oxygen conveying assembly; the first oxygen conveying assembly comprises a first switch valve and a first oxygen conveying pipeline, and when the first switch valve is opened, an external oxygen source can convey oxygen into the monitoring cabin through the first oxygen conveying assembly; the second oxygen conveying assembly comprises a second switch valve and a second oxygen conveying pipeline, and when the second switch valve is opened, the external oxygen source can convey oxygen into the monitoring cabin through the second oxygen conveying assembly; the oxygen flow rate of the first oxygen conveying pipeline when the first switch valve is opened is larger than the oxygen flow rate of the second oxygen conveying pipeline when the second switch valve is opened, and the oxygen flow rate is the flow rate of oxygen input into the containing cabin. The oxygen supply system can supply oxygen into the monitoring cabin at different oxygen flow rates based on the first oxygen supply pipeline and the second oxygen supply pipeline, the flow capacity is high, oxygen can be supplied into the monitoring cabin at a high oxygen flow rate, and the oxygen concentration in the monitoring cabin can be rapidly increased within a short time.

The oxygen supply intervention system comprises a rack, an oxygen bottle, an airflow control valve, a corrugated pipe, an oxygen mask, a first square pipe, a limiting plate, a limiting hole, a second square pipe and a sliding assembly, a mounting table is arranged at the top of the second square pipe, a rotating plate is rotatably arranged on the mounting table, and a sliding plate is horizontally and slidably arranged on the rotating plate; an alarm assembly is arranged on the sliding plate, an opening is formed in the sliding plate, a first pipe clamp is arranged in the opening, a mounting rod is horizontally arranged on one side of the rotating plate, and a guide pipe is arranged at the end, away from the rotating plate, of the mounting rod. The corrugated pipe is limited through the limiting hole, the first pipe clamp and the guide pipe, so that the corrugated pipe droops from the upper portion of the front side of the user to be connected with the oxygen mask, the situation that when the corrugated pipe is accidentally pulled by interfering with movement actions of the user, the first pipe clamp and the sliding plate move is avoided, and when the alarm assembly detects that the sliding distance of the sliding plate is large, the alarm assembly reminds the user.

This invention relates to a barrier paper comprising a paper base material and a carboxymethyl cellulose coating layer formed on a surface of the paper base material, wherein the paper base material is a cellulosic paper and the carboxymethyl cellulose coating layer comprises 80-100% by weight of carboxymethyl cellulose, based on dry weight.

A refrigeration apparatus, comprising a container and an oxygen control module, wherein the oxygen control module is in communication with the container for adjusting the oxygen content in the container. The oxygen concentration inside the container of the refrigeration apparatus provided in the present application can be controlled by the oxygen control module, so as to create a low-oxygen or high-oxygen environment, thereby meeting the freshness preservation storage requirements of different food materials.

The application discloses a method for efficiently oxidizing benzaldehyde by using the high oxygen dissolving capacity of fluorocarbon compounds. The method uses the high oxygen dissolving capacity of fluorocarbon compounds, so that the oxygen dissolved in the fluorocarbon compounds and the benzaldehyde dissolved in the alkane can efficiently perform the oxidation reaction under normal temperature, normal pressure and low-speed stirring. Meanwhile, the fluorocarbon compounds can be separated by standing due to the chemical reaction inertness of the fluorocarbon compounds and the difference characteristics of the physical and chemical properties of the fluorocarbon compounds and the hydrocarbon compounds, so that the recycling of the fluorocarbon compounds is realized. The oxygen dissolved in the fluorocarbon compounds is used as a weak oxidizing agent, and the oxidation reaction occurs in the liquid phase, so that the effect of no residue of the oxidizing agent is realized. Compared with no addition of the fluorocarbon compounds, the conversion rate of the benzaldehyde is increased by 4 times, and the efficient oxidation of the benzaldehyde is realized.

The application provides an animal model of high-oxygen-induced retinal neovascular disease and a preparation method thereof. The method comprises the following steps: placing a mouse born for 3-7 days in an environment with an oxygen concentration of 75-85%, and maintaining for 10-30 days. The method can successfully induce a long-acting retinal neovascular disease model, has a high modeling rate, fewer complications, more persistent retinal neovascular lesions, and a model duration of 55 days. The animal model provides a more optimal model for exploring long-acting anti-retinal neovascular related drugs.

The invention relates to the technical field of building environments, in particular to a low-energy-consumption non-contact targeted oxygen supply system which comprises an oxygen supply device body, a static pressure box, an oxygen supply hose, a fan, a personalized oxygen supply terminal and an oxygen detection device used for sampling oxygen concentration in a sampling area. The personalized oxygen supply terminal comprises a plurality of air outlet pipes, and the air outlet pipes have adjustable oxygen supply parameters; the system further comprises a joint optimization module which is used for carrying out iterative optimization on the oxygen supply concentration and the oxygen supply parameters according to a Kriging-multi-island genetic algorithm to obtain an optimal oxygen supply parameter combination so as to realize optimal oxygen supply. According to the method, through combined optimization of side type multi-angle jet flow, local encryption grid CFD analysis and the Kriging-multi-island genetic algorithm, the problems that in the prior art, oxygen conveying energy consumption is large, the oxygen supply effect is poor, and testing means are lacked are solved, accurate oxygen supply only for the breathing area is achieved, energy consumption is remarkably reduced, and comfort and safety are improved.

The invention discloses a flow control device for improving the oxygen concentration of a PSA oxygen generator under the low flow condition. The flow control device comprises a compressor, a diverter valve, an oxygen tank and a standby molecular sieve tank and a usable molecular sieve tank, an oxygen inlet, a first outlet and a second outlet are formed in a valve body of the flow dividing valve, a valve assembly is arranged on the valve body, and the valve assembly can adjust the gas path sectional area of a first gas path and the gas path sectional area of a second gas path. An outlet of the compressor is connected with an inlet of the molecular sieve tank, an outlet of the molecular sieve tank is connected with an inlet of the oxygen tank, an outlet of the oxygen tank is connected with an inlet of the diverter valve, and the first outlet is connected with the downstream assembly. By arranging the flow divider valve, the flow of oxygen discharged from the molecular sieve tank is not limited, flow division operation is carried out, redundant oxygen is discharged or recycled, gas output is not limited, the oxygen generator is made to run within the working flow range with the highest oxygen concentration all the time, the nitrogen breakdown effect is avoided, and the service life of the oxygen generator is prolonged. And it is ensured that the oxygen concentration can meet the use requirement under the low-flow condition.

The invention belongs to the technical field of biological medicine, and particularly relates to application of a CCL20 / CCR6 axis in bronchial pulmonary dysplasia. According to the application of the targeted CCL20 / CCR6 shaft in the aspect of preparing the medicine for treating bronchial pulmonary dysplasia, it is proved that CCL20 can cause damage to the normal pulmonary development process of newborn mice; and the neutralizing antibody of CCL20 or the antagonist of CCR6 can effectively improve the pulmonary alveoli development retardation of the BPD mouse induced by high oxygen exposure. The invention provides a new thought for preparing the medicine for treating the BPD, and a method for better treating the BPD is realized by applying the targeted CCL20 / CCR6 to the development process of the medicine related to the BPD; meanwhile, the selection field of medicines for treating BPD is widened, and contributions are made to the development of the technical field.

The invention relates to the technical field of machine vision and intelligent safety monitoring, in particular to a high oxygen partial pressure environment personnel state monitoring system based on machine vision. A data acquisition module, a feature processing module and a reliability analysis module; the system determines a stimulated stochastic resonance enhancement coefficient by acquiring environment pressure, oxygen partial pressure and image features; the core of the method is that according to the coefficient and the time sequence parameter, the interruption decoupling probability of the environmental noise and the personnel semantic primitive is calculated, so that the effective recognition intensity is determined, and the personnel consciousness state is evaluated; a stimulated stochastic resonance mechanism is utilized, resonance is induced by actively injecting auxiliary noise, the detection rate of weak signals is improved, weak sign loss caused by traditional filtering is avoided, and the detection limit in an extreme signal-to-noise ratio environment is remarkably improved.

This invention belongs to the field of fermentation tank technology, specifically a high-oxygen-rate aerobic fermentation tank. It includes a tank body with an inlet and an outlet. An oxygenation mechanism is installed on the tank body, comprising an oxygenation component and a stirring motor for driving the oxygenation component to rotate. A rotating shaft is connected to the stirring motor. The oxygenation component is located inside the tank body, and the stirring motor is mounted on the upper part of the tank body via a motor frame. The oxygenation component includes a connecting seat, which is fixedly connected to the rotating shaft. A movable frame is horizontally slidably connected to the connecting seat, and stirring frames are connected to both ends of the movable frame. A drive mechanism is installed on the rotating shaft to drive the movable frame to reciprocate. In this invention, the oxygenation component rotates while simultaneously reciprocating radially through the drive mechanism, forming a complex stirring trajectory. Combined with the active breaking of bubbles by a crushing rod, dynamic stirring and bubble breaking are achieved, significantly increasing the dissolved oxygen rate compared to traditional equipment.

This invention relates to the fields of medical device technology and signal processing algorithm technology. Specifically, it relates to an in vitro cardiac contractility dynamic enhancement system and method based on R-wave peak dual-modal sensing. The problem addressed by this invention is the technical issues of poor safety, high oxygen consumption, insufficient precision, and lack of automated closed-loop control in isolated cardiac mechanical perfusion methods. To solve these problems, this invention provides an in vitro cardiac contractility dynamic enhancement method based on R-wave peak dual-modal sensing, comprising: obtaining an initial threshold and an initial R-wave template library based on real-time cardiac physiological signals within an initial target time period; obtaining the true R-wave peak based on waveform verification of candidate R-wave peaks within the target time period and the initial threshold; calculating the stimulation delay based on species-preset parameters and real-time cardiac physiological signals; and selecting the stimulation mode and adjusting the energy parameters based on changes in the real-time cardiac physiological signals.

Disclosed are an electrode for a fuel cell a membrane-electrode assembly including the same, and a method of preparing the same. The electrode may include catalyst particles; and a binder in which the catalyst particles are dispersed. In particular, the binder may include an ionomer having proton conductivity and a polymer of intrinsic microporosity (PIM) in order to implement high oxygen permeability.

The invention relates to the technical field of oxygenerators, in particular to a dynamic control method and system for improving oxygen concentration stability of an oxygenerator, and the method comprises the following steps: obtaining an optimal oxygen concentration adsorption period through an experiment, and the adsorption period is the optimal adsorption period; finely adjusting the adsorption period, wherein the finely-adjusted adsorption period should be within a certain range of the optimal adsorption period. The adsorption period is the correlation multiple of the pulse period, and correspondingly, the operation state of the pulse period is always the same as that of the first 1 / 2 / 4 pulses after every 1 / 2 / 4 periods. The adsorption period is finely adjusted again, and the pulse point is located at the fixed position of the adsorption period. Namely, the adsorption period of the molecular sieve and the breathing pulse period of the user are synchronized in real time, and the phases of the molecular sieve and the breathing pulse period are accurately aligned, so that each time of inspiration of the user can occur in a high-oxygen-yield concentration window in the adsorption stage of the molecular sieve. The oxygen generator system enters stable circulation, so that the purpose of stabilizing the oxygen concentration is achieved.

The application relates to a fatigue life prediction method based on a physical failure mechanism under a liquid lead-bismuth environment, which comprises the following steps: establishing a representative volume element model and defining elements belonging to a slip band; defining a crystal plasticity constitutive equation; determining parameters in the crystal plasticity constitutive equation; calculating an average shear strain range of the slip band; carrying out a fracture toughness test to obtain a specific fracture energy; establishing a fatigue life prediction model based on the physical failure mechanism; carrying out a low-cycle fatigue test of a metal material under a high-temperature and high-oxygen liquid lead-bismuth environment to determine an oxide film thickness; and establishing a fatigue life prediction model under a high-oxygen-concentration liquid lead-bismuth environment to predict the fatigue life of the metal material under the high-oxygen-concentration liquid lead-bismuth environment. The low-cycle fatigue test for calibrating parameters of the crystal plasticity constitutive equation in the prediction temperature air and the fracture toughness test in the air and the liquid lead-bismuth environment can be carried out, so that the fatigue life under the liquid lead-bismuth environment can be predicted.

A portable medical ventilator that uses pulsed flow from an oxygen concentrator to obtain higher oxygen concentrations, includes a positive pressure source to deliver pressurized air to a patient and a negative pressure source to trigger the oxygen concentrator. A patient circuit attached to a patient interface mask connects the ventilator to the patient. The ventilator includes a controller module configured to generate a signal to the negative pressure device to trigger the concentrator to initiate one or more pulses of oxygen from the oxygen concentrator. The pulses of oxygen are delivered directly to the patient interface through a multi-tube or multi-lumen patient circuit. The oxygen is not mixed with air in the ventilator or patient circuit and bypasses leaks in the patient circuit and / or patient interface.

The present invention relates to a bubble fountain-type water circulation device, and more particularly, to a bubble fountain-type water circulation device which combines a centrifugal pump and a jet pump, enables water to circularly flow through the function of the centrifugal pump, sucks air through the function of the jet pump, enables water in a high-capacity reservoir to circulate in a high-oxygen saturation state, and enables the water to circulate in a high-oxygen saturation state. According to the improved bubble fountain type water circulation device, anaerobic bottom water is lifted to the surface layer, the content of dissolved oxygen required by self-purification activity of aerobic microorganisms is increased, and the water quality of a reservoir is effectively improved.

The invention provides a composite material with high oxygen barrier property and a preparation method and application thereof, and relates to the technical field of paper function modification. The composite material comprises a paper-based material, and further comprises a first polyhydroxyalkanoate coating, a second nanocellulose coating and a third polylactic acid coating which are sequentially arranged on the paper-based material. The three coatings form a synergistic barrier system of'basic barrier-path extension-efficient protection ', and through the dual effects of physical barrier of the dense film layer and path extension of the net structure, the oxygen permeation amount is greatly reduced, and the excellent high oxygen barrier effect is achieved.

The utility model relates to the technical field of sewage treatment, in particular to a high-oxygen sludge concentration device which comprises a sludge tank, the device further comprises a reaction box, a sealing cover, an adding opening, an air pump, a hose, a moving seat and a guide pipe, the reaction box is arranged at the left end of the rear side surface of the sludge tank, the sealing cover is arranged on the top surface of the reaction box, and the adding opening is formed in the left side of the upper surface of the sealing cover; according to the device, the reaction box is arranged, the adding port of the reaction box is opened, chemical raw materials such as an oxidizing agent are added into the reaction box, reaction is carried out in the reaction box, oxygen with high purity is generated, then the air pump is opened, and the oxygen in the reaction box is conveyed into the guide pipe through the hose; and the sludge is injected into the sludge tank from the port position of the guide pipe, so that an oxidation reaction is initiated, organic substances and harmful microorganisms in the sludge are destroyed, bacteria in the sludge are prevented from forming extracellular polysaccharide polymers due to anaerobism to influence wall breaking and dewatering effects, and meanwhile, the concentration efficiency of the sludge is improved.

This invention discloses an ionic chalcogenide five-membered heterocyclic conjugated oligomer, its preparation method, and its applications. To address the problems of commonly used Type-II photosensitizing drugs' high oxygen dependence, making it difficult to maintain high activity sustainably; and the unclear molecular design mechanism of Type-I photosensitizing drugs, leading to low photosensitization activity, low reactive oxygen species (ROS) production, and insufficient antibacterial activity, this invention discloses an ionic photosensitizing drug based on a chalcogenide five-membered heterocyclic conjugated oligomer structure. This drug significantly increases the generation of ROS, demonstrating improved Type-I photodynamic response performance. Furthermore, the antibacterial activity of the conjugated oligomer of this invention is significantly enhanced, requiring significantly lower effective concentrations; nanomolar doses are sufficient to rapidly inactivate methicillin-resistant Staphylococcus aureus (MRSA), Staphylococcus aureus, and Escherichia coli. The photosensitizing drug described in this invention possesses excellent antibacterial properties and biofriendliness, and is expected to become one of the candidate drugs for photodynamic antibacterial therapy in clinical applications.

The invention provides a pipeline stress corrosion monitoring device and a stress corrosion risk evaluation method.The monitoring device comprises a shell, an environment simulation unit, a signal acquisition device and a signal processing module, a cavity is formed in the shell and provided with a medium channel communicated with a to-be-monitored pipeline, and the environment simulation unit is connected with the signal acquisition device; the environment simulation unit comprises a heating device arranged in the cavity and an air supply device connected with the cavity through a waterproof breathable film, the heating device is used for heating a medium in the cavity, and the air outlet end of the air supply device is connected with the cavity and used for introducing oxygen into the cavity; the environment simulation unit accurately simulates severe environment conditions such as high temperature, high oxygen, solution concentration and the like specific to weak areas (such as a weld heat affected zone and a fluid dead zone) which are difficult to directly monitor due to a complex structure in a pipeline system by actively controlling the medium temperature and the dissolved oxygen concentration in a cavity; therefore, equivalent evaluation of the stress corrosion behavior of the high-risk area is realized at a conventional pipe section position where a probe is easy to install.

The utility model provides high-oxygen laser cutting equipment which comprises a machine base, a workpiece transfer table, a high-oxygen laser cutting head and anti-collision devices, one side of the machine base is fixedly connected with the workpiece transfer table, the high-oxygen laser cutting head is fixedly installed on the machine base, and the anti-collision devices are evenly and fixedly installed at the bottom of the high-oxygen laser cutting head. By means of the overall arrangement, a workpiece needing to be cut can be carried through the workpiece transfer table to enter the position below the high-oxygen laser cutting head to be cut, and after cutting is completed, the workpiece can be automatically moved out of the position below the high-oxygen laser cutting head; the high-oxygen laser cutting head can conveniently and rapidly cut another workpiece on the workpiece transfer table, so that time waste is reduced, cutting efficiency is improved, and meanwhile the high-oxygen laser cutting head has a good anti-collision effect and is safer and more reliable.

The invention is related to a hydrated silicone hydrogel contact lens having a layered structural configuration: a lower water content silicone hydrogel core (or bulk material) completely covered with a layer of a higher water content hydrogel totally or substantially free of silicone. A hydrated silicone hydrogel contact lens of the invention possesses high oxygen permeability for maintaining the corneal health and a soft, water-rich, lubricious surface for wearing comfort.

The invention relates to the field of electric appliances, in particular to refrigeration equipment which comprises a container and an oxygen control module located outside the container, a low-oxygen through hole and a high-oxygen through hole which are communicated with the inside and the outside of the container are formed in the container, and the oxygen control module is provided with a low-oxygen connector corresponding to the low-oxygen through hole and a high-oxygen connector corresponding to the high-oxygen through hole; the refrigeration equipment further comprises a converter arranged between the container and the oxygen control module, the converter has a first state and a second state, when the converter is in the first state, the low-oxygen interface is communicated with the low-oxygen through hole, and the high-oxygen interface is communicated with the outside of the container; the high-oxygen interface is communicated with the high-oxygen through hole; and the low-oxygen interface is communicated with the outside of the container. In the refrigeration equipment provided by the invention, the oxygen content in the air in the container can be changed by controlling the converter to be in the first state or the second state, so that the interior of the container can be changed into a high-oxygen area or a low-oxygen area according to customer requirements.

The utility model relates to the technical field of fresh-keeping equipment, and provides a fresh-keeping chamber structure and a refrigerator, the fresh-keeping chamber structure comprises a box body and an air conditioning device, the box body defines a ripening chamber, a first fresh-keeping chamber and a second fresh-keeping chamber, the air conditioning device communicates with the ripening chamber, the first fresh-keeping chamber and the second fresh-keeping chamber, and the air conditioning device is provided with an adsorption assembly; the adsorption assembly is used for adsorbing and separating oxygen and ethylene in the ripening chamber and the first fresh-keeping chamber, conveying the oxygen to the second fresh-keeping chamber, conveying the oxygen and the ethylene to the ripening chamber, and creating a low-oxygen environment of the first fresh-keeping chamber; oxygen separated by the adsorption assembly is conveyed to the second fresh-keeping chamber, so that a high-oxygen environment of the second fresh-keeping chamber is created; and the separated oxygen and ethylene are conveyed to the ripening chamber, a suitable ripening environment is provided for fruits needing ripening, the problem that traditional fresh-keeping equipment cannot meet the fresh-keeping requirements of different food materials at the same time is effectively solved, and the overall fresh-keeping effect of the food materials is improved.