Refrigerator freshness control method, system, electronic device and storage medium

Abstract

The present application relates to a refrigerator preservation control method, system, electronic device, and storage medium, wherein the refrigerator preservation control method includes: when an object is detected to be placed in a target container, cooling the target container; obtaining the real-time temperature and oxygen concentration parameter value of the target container; when the real-time temperature is less than or equal to a preset temperature threshold, stopping the cooling process of the target container, and executing the corresponding nitrogen filling equipment operation strategy based on the oxygen concentration parameter value obtained by detection, so that the nitrogen filling equipment replenishes nitrogen to the target container. By first cooling the target container, the subsequent nitrogen filling content is increased, and then different nitrogen filling equipment operation strategies are executed according to different oxygen concentration parameter values, thereby improving the accuracy of nitrogen filling, thereby solving the problem of poor refrigerator preservation effect.

Description

Technical Field

[0001] The present application relates to the field of refrigerators, and in particular to a refrigerator preservation control method, system, electronic device and storage medium. Background Art

[0002] With the continuous improvement of living standards and dietary structure, people have higher and higher requirements for the freshness and long-term preservation of fruits and vegetables. They not only want fruits and vegetables to maintain their freshness, but also want to maximize the retention of nutrients in fruits and vegetables. Currently, controlled atmosphere preservation technology has become relatively common. Controlled atmosphere technology uses gas-controlled equipment to adjust the oxygen and carbon dioxide concentrations in the fruit and vegetable drawer. By reducing the oxygen concentration in the storage environment and increasing the carbon dioxide concentration, it inhibits aerobic respiration of fruits and vegetables and the consumption of their own nutrients. Alternatively, a controlled atmosphere membrane (which allows oxygen to pass through and blocks nitrogen) is installed to maintain an atmosphere of nitrogen-rich and oxygen-poor gas in the refrigerator drawer, thereby achieving the purpose of fruit and vegetable freshness. The control mode of the controlled atmosphere preservation system in the existing technology is single and fixed. However, during actual use by users, the storage amount of fruits and vegetables varies, which will cause the overall transpiration intensity of fruits and vegetables to change. At the same time, the requirements for oxygen concentration for preserving different types of fruits and vegetables are also different. Moreover, this technical solution only adjusts the nitrogen and oxygen in the refrigerator through the controlled atmosphere membrane, and does not consider the impact of other factors on the preservation effect. It is also impossible to make detailed and accurate adaptive adjustments based on the changes in the nitrogen concentration in the refrigerator, and thus cannot achieve a good preservation effect.

[0003] With regard to the problem of poor fresh-keeping effect of refrigerators in related technologies, no effective solution has been proposed so far. Summary of the Invention

[0004] In this embodiment, a refrigerator freshness control method, system, electronic device and storage medium are provided to solve the problem of poor freshness preservation effect of refrigerators in related technologies.

[0005] In a first aspect, a refrigerator freshness control method is provided in this embodiment, comprising:

[0006] When an object is detected to be placed in the target container, the target container is cooled down;

[0007] Obtain the real-time temperature and oxygen concentration parameter values ​​of the target container;

[0008] When the real-time temperature is less than or equal to the preset temperature threshold, the cooling process for the target container is stopped, and the corresponding operation strategy of the nitrogen filling equipment is executed according to the oxygen concentration parameter value obtained by detection, so that the nitrogen filling equipment replenishes nitrogen to the target container.

[0009] In some embodiments, when it is detected that there is no object in the target container, the nitrogen filling device is controlled to remain in a closed state.

[0010] In some embodiments, executing an operation strategy of a corresponding nitrogen filling device according to the oxygen concentration parameter value obtained by detection includes:

[0011] Determine the oxygen concentration range based on the oxygen concentration parameter value.

[0012] The duty cycle of the air pump of the nitrogen filling equipment is matched in real time according to the range of oxygen concentration, so that the air pump of the nitrogen filling equipment operates according to the duty cycle obtained by real-time matching to replenish nitrogen to the target container.

[0013] In some embodiments, the interval of oxygen concentration is divided into a first interval, a second interval, a third interval, a fourth interval and a fifth interval, wherein the first interval is: working threshold value < oxygen concentration parameter value ≤ first preset value, the second interval is: first preset value < oxygen concentration parameter value ≤ second preset value, the third interval is: second preset value < oxygen concentration parameter value ≤ third preset value, the fourth interval is: third preset value < oxygen concentration parameter value ≤ fourth preset value, and the fifth interval is: fourth preset value < oxygen concentration parameter value ≤ fifth preset value.

[0014] In some embodiments, before executing the corresponding operation strategy of the nitrogen filling device according to the oxygen concentration parameter value obtained by the detection so that the nitrogen filling device replenishes nitrogen to the target container, the method further includes:

[0015] Determine whether the time since the last end of the fresh-keeping mode of the nitrogen filling device is greater than a preset time interval. If so, turn on the nitrogen filling device to replenish nitrogen to the target container; wherein the fresh-keeping mode is a mode of replenishing nitrogen to the target container by controlling the operation of the nitrogen filling device.

[0016] In some embodiments, detecting whether an object is placed in a target container includes:

[0017] Determine whether the change rate of the target container temperature within a preset time period is greater than a preset change rate threshold,

[0018] If so, it is confirmed that there is an object placed in the target container.

[0019] In a second aspect, a refrigerator freshness control system is provided in this embodiment, which applies the refrigerator freshness control method described in the first aspect. The system includes: a temperature sensor, an oxygen monitoring sensor, a control center, a nitrogen filling device, and an air pump, wherein:

[0020] Temperature sensor, used to detect the real-time temperature in the target container and transmit the real-time temperature to the control center;

[0021] An oxygen monitoring sensor is used to detect the oxygen concentration parameter value in the target container and transmit the oxygen concentration parameter value to the control center;

[0022] The control center is used to cool the target container when it is detected that there is an object in the target container; it is also used to execute the corresponding operation strategy of the nitrogen filling equipment according to the oxygen concentration parameter value obtained by detection, so that the nitrogen filling equipment replenishes nitrogen to the target container.

[0023] In a third aspect, a computer device is provided in this embodiment, including a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the steps of the refrigerator preservation control method described in the first aspect are implemented.

[0024] In a fourth aspect, an electronic device is provided in this embodiment, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the refrigerator preservation control method described in the first aspect is implemented.

[0025] In a fifth aspect, a storage medium is provided in this embodiment, on which a computer program is stored. When the program is executed by a processor, the refrigerator preservation control method described in the first aspect is implemented.

[0026] Compared to related technologies, the refrigerator freshness control method provided in this embodiment cools the target container upon detecting the placement of an object into the target container; obtains the target container's real-time temperature and oxygen concentration parameter value; and stops cooling the target container when the real-time temperature is less than or equal to a preset temperature threshold. The system then executes a corresponding nitrogen filling device operation strategy based on the detected oxygen concentration parameter value, causing the nitrogen filling device to replenish nitrogen into the target container. By first cooling the target container, the subsequent nitrogen filling content is increased. Then, different nitrogen filling device operation strategies are implemented based on different oxygen concentration parameter values, improving nitrogen filling accuracy and thus resolving the issue of poor refrigerator freshness.

[0027] The details of one or more embodiments of the present application are set forth in the following drawings and description to make other features, objects, and advantages of the present application more readily apparent. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0029] Figure 1 This is a hardware structure block diagram of a terminal of the refrigerator freshness control method of this embodiment.

[0030] Figure 2 4 is a flow chart of the refrigerator freshness control method of this embodiment.

[0031] Figure 3 This is a flow chart of another refrigerator freshness control method of this embodiment.

[0032] Figure 4 This is a structural block diagram of the refrigerator freshness-keeping control system of this embodiment. DETAILED DESCRIPTION

[0033] In order to more clearly understand the purpose, technical solutions and advantages of the present application, the present application is described and illustrated below in conjunction with the accompanying drawings and embodiments.

[0034] Unless otherwise defined, the technical terms or scientific terms involved in this application should have the general meaning understood by people with ordinary skills in the technical field to which this application belongs. The words "one", "an", "a", "the", "these" and the like in this application do not indicate quantitative restrictions, and they can be singular or plural. The terms "include", "comprise", "have" and any variants thereof involved in this application are intended to cover non-exclusive inclusions; for example, a process, method and system, product or device comprising a series of steps or modules (units) is not limited to the listed steps or modules (units), but may include unlisted steps or modules (units), or may include other steps or modules (units) inherent to these processes, methods, products or devices. The words "connect", "connected", "coupled" and the like involved in this application are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The "plurality" involved in this application refers to two or more. "And / or" describes the relationship between related objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, and B exists alone. Generally, the character " / " indicates that the related objects are in an "or" relationship. The terms "first," "second," "third," etc. used in this application are only used to distinguish similar objects and do not represent a specific ordering of the objects.

[0035] The method embodiment provided in this embodiment can be executed in a terminal, a computer or a similar computing device. For example, running on a terminal, Figure 1 FIG. 1 is a block diagram of the hardware structure of the terminal of the refrigerator freshness control method of this embodiment. Figure 1 As shown, the terminal may include one or more ( Figure 1Only one is shown) a processor 102 and a memory 104 for storing data, wherein the processor 102 may include but is not limited to a processing device such as a microprocessor MCU or a programmable logic device FPGA. The above terminal may also include a transmission device 106 and an input and output device 108 for communication functions. It will be understood by those skilled in the art that Figure 1 The structure shown is only for illustration and does not limit the structure of the above terminal. Figure 1 More or fewer components than shown, or with Figure 1 Different configurations shown.

[0036] The memory 104 can be used to store computer programs, for example, software programs and modules of application software, such as the computer program corresponding to the refrigerator preservation control method in this embodiment. The processor 102 executes various functional applications and data processing by running the computer program stored in the memory 104, that is, implementing the above-mentioned method. The memory 104 may include a high-speed random access memory, and may also include a non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory 104 may further include a memory remotely located relative to the processor 102, and these remote memories may be connected to the terminal via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0037] The transmission device 106 is used to receive or send data via a network. The network may include a wireless network provided by the terminal's telecommunications provider. In one embodiment, the transmission device 106 includes a network interface controller (NIC), which can be connected to other network devices via a base station to enable communication with the Internet. In another embodiment, the transmission device 106 may be a radio frequency (RF) module, which is used to communicate with the Internet wirelessly.

[0038] In this embodiment, a refrigerator freshness control method is provided. Figure 2 FIG. 1 is a flow chart of the refrigerator freshness control method of this embodiment. Figure 2 As shown, the process includes the following steps:

[0039] Step S201: When it is detected that an object is placed in a target container, the target container is cooled.

[0040] Specifically, to better preserve food, existing refrigerators include a sealed container within the refrigerator compartment. Nitrogen is added to the sealed container to reduce the oxygen concentration within the container, thereby improving food preservation. One or more sealed containers can be provided. This embodiment uses one sealed container as the target container for explanation. When an object is detected and placed into the target container, it affects the temperature inside the target container, causing a transient increase in the temperature of the local area. First, the temperature increase in the target container accelerates the spoilage of food, thus affecting the freshness of the food in the refrigerator. Second, the temperature change in the target container directly affects the density of the gas. From a microscopic perspective, when the temperature increases, the average kinetic energy of the gas molecules increases, the gas molecules move faster, and the collisions between gas molecules become more frequent. Due to the intensified thermal motion of the gas molecules, the average distance between gas molecules increases, making the space occupied by the gas in the target container appear more "full." Within a fixed space, the mass of the gas remains unchanged, but the gas molecule density decreases. When the temperature decreases, the average kinetic energy of the gas molecules decreases, the gas molecules move slower, and the collision frequency decreases. Due to the slowed thermal motion of the gas molecules, the average distance between gas molecules decreases. Within a fixed space, the mass of the gas remains unchanged, resulting in an increase in the gas molecule density. Therefore, in a target container of the same volume, at low temperatures, the gas density is higher, more nitrogen can be filled, and the proportion of oxygen is smaller, thus achieving better freshness preservation. Therefore, in this embodiment, during the refrigerator preservation process, after detecting that an object has been placed in a target container, the air inlet behind the target container can be opened to deliver cold air from the refrigerated compartment to the target container to cool the target container. Alternatively, when the temperature in the refrigerated compartment is high, the compressor can be simultaneously turned on to cool the refrigerated compartment, and then the cold air can be delivered to the target container to cool the target container. Alternatively, the fan in the refrigerated compartment can be operated to accelerate the entry of cold air into the target container. The method for cooling the target container in this embodiment is not specifically limited and can be set according to actual needs. The cooling process improves the ability to subsequently replenish nitrogen, increases the nitrogen content that can be accommodated in the sealed container, and improves the preservation effect of the target container.

[0041] Step S202, obtaining the real-time temperature and oxygen concentration parameter values ​​of the target container;

[0042] When the real-time temperature is less than or equal to the preset temperature threshold, the cooling process for the target container is stopped, and the corresponding operation strategy of the nitrogen filling equipment is executed according to the oxygen concentration parameter value obtained by detection, so that the nitrogen filling equipment replenishes nitrogen to the target container.

[0043] Specifically, a temperature sensor is used to detect the real-time temperature of the target container. The temperature sensor can be a thermocouple, a thermistor, or a non-contact type such as an infrared temperature sensor. In this embodiment, an infrared temperature sensor is used to detect the real-time temperature of the target container. The specific selection can be made based on actual conditions and is not specifically limited in this embodiment. Simultaneously, an oxygen monitoring sensor is used to detect the oxygen concentration parameter value within the target container. Different oxygen concentration parameter values ​​correspond to different current signals.

[0044] Specifically, the target container is cooled. Cooling the target container is stopped when the detected real-time temperature of the target container is less than or equal to a preset temperature threshold. Generally, the temperature of the refrigerator's refrigerated compartment is set between 2°C and 8°C. This embodiment takes into account the fact that the cooling process provides a buffering effect on the temperature, and the temperature difference between the target container and the refrigerated compartment should not be too large to prevent the target container's temperature from affecting the refrigerated compartment. Therefore, the target temperature is set within ±2°C of the refrigerated compartment temperature, that is, between 4°C and 10°C. Therefore, when the detected real-time temperature of the target container reaches between 4°C and 10°C, cooling the target container is stopped. The nitrogen filling and preservation phase begins.

[0045] Furthermore, the primary cause of food spoilage is oxidation reactions with oxygen in the air. In modern food preservation technology, Modified Atmosphere Packaging (MAP) is a method that precisely controls the gas composition within packaging to extend the shelf life of food. Devices that inhibit food oxidation by adding nitrogen to the refrigerator are commonly referred to as "controlled atmosphere" or "oxygen-controlled freshness preservation technology." This technology adjusts the atmosphere within the refrigerator, primarily reducing the oxygen content and increasing the nitrogen content, to slow food metabolism and microbial activity, thereby extending food's shelf life. Another technology, nitrogen freshness-locking technology, leverages nitrogen's chemical inertness by injecting it into food packaging to isolate the food from the air, effectively preventing the invasion of oxygen, water vapor, and microorganisms, thereby preserving the food's original taste, color, and nutritional value. These technologies all achieve freshness preservation by controlling the gas environment within the refrigerator. By reducing oxygen and increasing nitrogen, they inhibit food oxidation, thereby extending food's shelf life.

[0046] In this embodiment, a MAP assembly is used as a nitrogen filling device to replenish nitrogen to the target container. The MAP assembly includes components such as an air pump, a fan, a molecular sieve, a solenoid valve, and a throttle ring. After the preservation system is started, the air pump starts working to compress the external air. The compressed air first passes through a filter to remove dust and impurities, and then passes through a drying device to remove moisture, ensuring that the gas entering the target container is clean and dry. The clean and dry air then passes through the molecular sieve assembly, which is used to separate nitrogen and oxygen in the air. Due to its chemical inertness, nitrogen can effectively replace oxygen in the container and reduce the possibility of food oxidation. The separated nitrogen is mixed with other gases that may be added (such as carbon dioxide and rare gases) to form a gas mixture suitable for food preservation. The mixed gas is precisely injected into the target container under the control of the solenoid valve. The throttle ring is used to control the speed and pressure of gas injection to ensure that the gas is evenly filled into every corner of the target container. In this embodiment, the operating strategy of the MAP component is determined by the oxygen concentration parameter value in the target container obtained by detection. The higher the oxygen concentration parameter value, the larger the duty cycle of the air pump in the MAP component is controlled, thereby accelerating the speed of nitrogen replenishment.

[0047] Through the above steps S201 to S202, after detecting that an object has been placed in the target container, the target container is cooled; the real-time temperature and oxygen concentration parameter value of the target container are obtained; when the real-time temperature is less than or equal to a preset temperature threshold, the cooling of the target container is stopped, and the corresponding nitrogen filling device operation strategy is executed based on the detected oxygen concentration parameter value, so that the nitrogen filling device replenishes nitrogen to the target container. Compared with the current method of maintaining a nitrogen-rich and oxygen-depleted gas atmosphere in the refrigerator drawer by providing a modified atmosphere membrane (which passes oxygen and blocks nitrogen), this embodiment, after detecting that an object has been placed in the target container, first cools the target container to a preset temperature value, and then executes the corresponding nitrogen filling device operation strategy based on the detected oxygen concentration parameter value to replenish nitrogen to the target container. The first cooling of the target container allows more nitrogen to be added to the same target container volume during the subsequent nitrogen replenishment process, thereby achieving a lower oxygen concentration and achieving a better preservation effect. Different nitrogen filling strategies are executed according to different oxygen concentration parameter values, thereby improving control accuracy and solving the problem of poor freshness preservation effect in current refrigerators.

[0048] In some embodiments, when it is detected that there is no object in the target container, the nitrogen filling device is controlled to remain in a closed state.

[0049] The current MAP assembly operates manually. Due to the large number of components and complex connections within the MAP assembly, its operating time is fixed at 40 minutes, with an interval of no less than 8 hours between activations. Furthermore, the MAP assembly is configured to continuously detect and replenish nitrogen, without taking into account the presence of objects within the target container. This embodiment, while simultaneously considering energy conservation and functional operation, does not activate the nitrogen filling device when it is detected that the target container is empty, i.e., when the target container is empty, regardless of the oxygen concentration, and instead remains in a closed state to reduce resource consumption.

[0050] In another embodiment, executing an operation strategy of a corresponding nitrogen filling device according to the oxygen concentration parameter value obtained by detection includes:

[0051] Determine the oxygen concentration range based on the oxygen concentration parameter value.

[0052] The duty cycle of the nitrogen filling device's air pump is matched in real time based on the oxygen concentration range, so that the nitrogen filling device's air pump operates according to the real-time matched duty cycle to replenish nitrogen to the target container. The oxygen concentration range is divided into a first range, a second range, a third range, a fourth range, and a fifth range. The first range is defined as follows: the oxygen concentration parameter value < a first preset value; the second range is defined as follows: the first preset value ≤ the oxygen concentration parameter value ≤ the second preset value; the third range is defined as follows: the second preset value ≤ the oxygen concentration parameter value ≤ the third preset value; the fourth range is defined as follows: the third preset value ≤ the oxygen concentration parameter value ≤ the fourth preset value; and the fifth range is defined as follows: the fourth preset value ≤ the oxygen concentration parameter value ≤ the fifth preset value.

[0053] Specifically, the oxygen monitoring sensor outputs different current signals depending on the oxygen concentration in the environment. The current signal range is designed to be between 0mA and 1mA. Generally, the current signal output by an oxygen monitoring sensor in sleep mode is ≤0.5mA, and the current signal output in working mode is between 0.5mA and 1mA. Based on the 0.5mA-1mA range of the current signal output in the working module, the oxygen concentration is further subdivided into five concentration ranges. Among them, the first preset value is set to 0.6mA, the second preset value is set to 0.7mA, the third preset value is set to 0.8mA, the fourth preset value is set to 0.9mA, and the fifth preset value is set to 1mA. The current signals corresponding to different oxygen concentration intervals are: first interval: (0.5mA-0.6mA]; second interval: (0.6mA~0.7mA]; third interval: (0.7mA~0.8mA]; fourth interval: (0.8mA~0.9mA]; fifth interval: (0.9mA~1mA]; each oxygen concentration interval sets a specific duty cycle of the air pump of the nitrogen filling equipment, and the duty cycles are 20%, 40%, 60%, 80%, and 100% respectively. According to the interval in which the oxygen concentration parameter value obtained by the detection is located, the corresponding duty cycle is selected to execute the nitrogen filling equipment for nitrogen filling. For example, when the oxygen detection When the sensor detects a high oxygen concentration, its current signal reaches 1mA, triggering the air pump to operate at a 100% duty cycle to quickly reduce the oxygen concentration. Conversely, if the oxygen concentration is low, the oxygen monitoring sensor outputs a smaller current signal, reaching 0.55mA. At this point, the air pump operates at a 20% duty cycle, preventing overfilling while saving energy. As the oxygen concentration continues to decrease and the output current signal continues to decrease, falling below 0.5mA, the air pump stops, and the nitrogen filling system stops filling. During this process, the oxygen sensor monitors the oxygen concentration in the target container in real time. The air pump's duty cycle is dynamically controlled based on the detected oxygen concentration parameter values, thereby precisely controlling the nitrogen filling system's operation, improving its efficiency, preventing overfilling, reducing unnecessary energy waste, and conserving energy.

[0054] In one embodiment, before executing the corresponding operation strategy of the nitrogen filling equipment according to the oxygen concentration parameter value obtained by the detection so that the nitrogen filling equipment replenishes nitrogen to the target container, the method further includes:

[0055] Determine whether the time since the last end of the fresh-keeping mode of the nitrogen filling device is greater than a preset time interval. If so, turn on the nitrogen filling device to replenish nitrogen to the target container; wherein the fresh-keeping mode is a mode of replenishing nitrogen to the target container by controlling the operation of the nitrogen filling device.

[0056] Specifically, when an object is placed in the target container and the target container is cooled to a preset temperature threshold, in order to prevent the nitrogen generator from being frequently started and causing damage to the equipment, a time interval parameter is set before the oxygen concentration of the target container is detected and the nitrogen generator is started to fill with nitrogen. This parameter is used to define the minimum rest time of the nitrogen filling equipment between two fresh-keeping modes. The time interval can be set based on the performance of the equipment, the material of the container and historical usage data. Check whether the time from the last fresh-keeping mode end of the nitrogen generator exceeds the preset time interval of 4 hours. If it exceeds 4 hours, nitrogen is filled according to the set nitrogen filling equipment operation strategy. If it does not exceed 4 hours, wait until it exceeds 4 hours before starting the nitrogen generator. The fresh-keeping mode is the process of replenishing nitrogen to the target container by starting the nitrogen filling equipment, that is, the nitrogen filling equipment is in working mode.

[0057] In some other embodiments, detecting whether an object is placed in a target container includes:

[0058] Determine whether the change rate of the target container temperature within a preset time period is greater than a preset change rate threshold,

[0059] If so, it is confirmed that there is an object placed in the target container.

[0060] Specifically, an object placed in a target container will rapidly heat up within a short period of time. The temperature of the object in the target container is detected by a red-dot infrared temperature sensor as the target container temperature. The temperature change is determined by the rate of change of the target container temperature within a preset time period. For example, the initial real-time temperature T0 of the target container is detected, followed by the real-time temperature T1 of the target container three seconds later. The temperature difference between the temperature T1 three seconds later and the initial real-time temperature T0 is calculated to obtain a temperature change difference ΔT. A determination is then made as to whether this temperature change difference ΔT is greater than or equal to a preset temperature difference. The preset temperature difference can be set based on actual conditions and is not specifically limited in this embodiment. In this embodiment, the temperature difference is set to 10°C. When the calculated temperature change difference ΔT is greater than or equal to 10°C, it is determined that an object has been placed in the target container. Otherwise, it is not considered that an object has been placed, and the temperature increase is determined to be caused by other factors, and the target container is not cooled.

[0061] This embodiment also provides a refrigerator freshness control method. Figure 3 This is a flow chart of another refrigerator freshness control method of this embodiment. Figure 3 As shown, the process includes the following steps:

[0062] Step S301, determine whether there is an object in the target container, if so, execute step S302, otherwise, execute step S309;

[0063] Step S302, determining whether there is an object placed in the target container, if so, executing step S303, otherwise, executing step S309.

[0064] Step S303, cooling the target container;

[0065] Step S304, obtaining the real-time temperature TD and oxygen concentration parameter value a of the target container;

[0066] Step S305 , determining whether the real-time temperature TD of the target container is less than or equal to a preset temperature threshold TC; if so, executing step S306 ; otherwise, returning to executing step S303 ;

[0067] Step S306, stopping the cooling process for the target container;

[0068] Step S307, determining whether the time interval between the nitrogen production equipment and the last start-up of nitrogen production exceeds a preset interval time, if so, executing step S308, otherwise executing step S309;

[0069] Step S308, dynamically matching the corresponding duty cycle according to the oxygen concentration parameter value a obtained by real-time detection to control the start of the air pump of the nitrogen production equipment, and filling the target container with nitrogen until the oxygen concentration parameter value a is less than the working threshold of the oxygen detection sensor, then stopping the operation of the air pump and stopping nitrogen filling.

[0070] Step S309: Control the nitrogen filling equipment to remain in a closed state.

[0071] Through steps S301 to S309, compared to the current practice of maintaining a nitrogen-rich, oxygen-depleted atmosphere within a refrigerator drawer by installing a modified atmosphere membrane (which passes oxygen and blocks nitrogen), this embodiment first cools the target container after detecting the presence of an object in the target container. This cooling allows more nitrogen to be added to the same target container volume during subsequent nitrogen replenishment, thereby achieving a lower oxygen concentration and better preservation. After the target container temperature drops to a preset value, an oxygen monitoring sensor detects the oxygen concentration parameter value within the target container. Based on the detected real-time oxygen concentration parameter value, the duty cycle of different levels is dynamically matched to control the operation of the nitrogen generator's air pump, filling the target container with nitrogen for freshness preservation, thereby resolving the current problem of poor freshness preservation in refrigerators. Furthermore, if the absence of an object or the presence of an object in the target container is detected, the nitrogen generator is controlled to remain in a stopped state, saving energy and reducing the wear of nitrogen generator component parts.

[0072] In this embodiment, a refrigerator fresh-keeping control system is also provided. The refrigerator fresh-keeping control system is used to implement the above embodiments and preferred implementation methods, and the details that have been explained will not be repeated here.

[0073] Figure 4 This is a block diagram of the refrigerator freshness-keeping control system of this embodiment. Figure 4 As shown, the refrigerator fresh-keeping control system 40 includes: a temperature sensor 41, an oxygen monitoring sensor 42, a control center 43, a nitrogen filling device 44 and an air pump 45, wherein:

[0074] The temperature sensor 41 is used to detect the real-time temperature in the target container and transmit the real-time temperature to the control center 43;

[0075] An oxygen monitoring sensor 42 is used to detect the oxygen concentration parameter value in the target container and transmit the oxygen concentration parameter value to the control center 43;

[0076] The control center 43 is used to cool the target container when it is detected that an object is placed in the target container; it is also used to execute the corresponding operation strategy of the nitrogen filling equipment according to the oxygen concentration parameter value detected, so that the nitrogen filling equipment replenishes nitrogen to the target container.

[0077] In this embodiment, a computer device is also provided, including a memory and a processor. The memory stores a computer program, and the processor implements the steps of any refrigerator preservation control method in any of the above method embodiments when executing the computer program.

[0078] This embodiment also provides an electronic device, including a memory and a processor, wherein the memory stores a computer program, and the processor is configured to run the computer program to execute the steps of any refrigerator preservation control method in any of the above method embodiments.

[0079] Optionally, the electronic device may further include a transmission device and an input / output device, wherein the transmission device is connected to the processor, and the input / output device is connected to the processor.

[0080] Optionally, in this embodiment, the processor may be configured to execute the following steps through a computer program:

[0081] S1, when an object is detected to be placed in the target container, the target container is cooled;

[0082] S2, obtaining the real-time temperature and oxygen concentration parameter values ​​of the target container;

[0083] S3, when the real-time temperature is less than or equal to the preset temperature threshold, the cooling process for the target container is stopped, and the operation strategy of the corresponding nitrogen filling equipment is executed according to the oxygen concentration parameter value obtained by the detection, so that the nitrogen filling equipment replenishes nitrogen to the target container.

[0084] It should be noted that, for specific examples in this embodiment, reference may be made to the examples described in the above embodiments and optional implementation modes, and will not be repeated in this embodiment.

[0085] In addition, in conjunction with the refrigerator freshness control method provided in the above embodiments, a storage medium may be provided in this embodiment to implement the method. The storage medium stores a computer program; when the computer program is executed by a processor, any of the refrigerator freshness control methods in the above embodiments is implemented.

[0086] It should be understood that the specific embodiments described herein are only used to explain this application and are not used to limit it. Based on the embodiments provided in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0087] Obviously, the accompanying drawings are merely examples or embodiments of the present application. A person skilled in the art can also apply the present application to other similar situations based on these drawings without inventive effort. Furthermore, it is understandable that, although the work involved in this development process may be complex and lengthy, certain design, manufacturing, or production changes based on the technical content disclosed in this application are merely routine technical means for a person skilled in the art and should not be considered to constitute a deficiency in the disclosure of the present application.

[0088] The term "embodiment" as used in this application refers to specific features, structures, or characteristics described in conjunction with the embodiment that can be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily mean that the embodiment is the same, nor does it mean that it is mutually exclusive with other embodiments and is independent or optional. It is understood, either explicitly or implicitly, by those skilled in the art that the embodiments described in this application can be combined with other embodiments when there is no conflict.

[0089] Those skilled in the art will appreciate that all or part of the processes in the above-mentioned embodiment methods can be implemented by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, database or other media used in the embodiments provided in this application may include at least one of non-volatile and volatile memory. Non-volatile memory may include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory may include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in the various embodiments provided herein may include at least one of a relational database and a non-relational database. Non-relational databases may include, but are not limited to, distributed databases based on blockchains. The processor involved in the various embodiments provided herein may be, but are not limited to, a general-purpose processor, a central processing unit, a graphics processing unit, a digital signal processor, a programmable logic unit, a data processing logic unit based on quantum computing, and the like.

[0090] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of patent protection. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present application shall be determined by the appended claims.

Claims

1. A refrigerator freshness control method, characterized in that: include: When an object is detected to be placed in a target container, the target container is cooled; Obtaining real-time temperature and oxygen concentration parameter values ​​of the target container; When the real-time temperature is less than or equal to a preset temperature threshold, the cooling process for the target container is stopped. And determine the interval of oxygen concentration according to the oxygen concentration parameter value, The duty cycle of the air pump of the nitrogen filling equipment is matched in real time according to the interval of the oxygen concentration, so that the air pump of the nitrogen filling equipment operates according to the duty cycle obtained by real-time matching to replenish nitrogen to the target container.

2. The refrigerator freshness control method according to claim 1, characterized in that: The method further comprises: When it is detected that there is no object in the target container, the nitrogen filling device is controlled to remain in a closed state.

3. The refrigerator freshness control method according to claim 1, characterized in that: The intervals in which the oxygen concentration is located are divided into a first interval, a second interval, a third interval, a fourth interval and a fifth interval, wherein the first interval is: the working threshold value < the oxygen concentration parameter value ≤ the first preset value, the second interval is: the first preset value < the oxygen concentration parameter value ≤ the second preset value, the third interval is: the second preset value < the oxygen concentration parameter value ≤ the third preset value, the fourth interval is: the third preset value < the oxygen concentration parameter value ≤ the fourth preset value, and the fifth interval is: the fourth preset value < the oxygen concentration parameter value ≤ the fifth preset value.

4. The refrigerator freshness control method according to claim 1, characterized in that: Before determining the oxygen concentration interval according to the oxygen concentration parameter value, and matching the duty cycle of the air pump of the nitrogen filling device in real time according to the oxygen concentration interval so that the air pump of the nitrogen filling device operates according to the duty cycle obtained by real-time matching, and replenishing nitrogen to the target container, the method further includes: Determine whether the time since the last time the nitrogen filling device ended the fresh-keeping mode is greater than a preset time interval. If so, turn on the nitrogen filling device to replenish nitrogen to the target container; wherein the fresh-keeping mode is a mode of replenishing nitrogen to the target container by controlling the operation of the nitrogen filling device.

5. The refrigerator freshness control method according to claim 1, characterized in that: The detecting whether there is an object placed in the target container includes: Determine whether the change rate of the target container temperature within a preset time period is greater than a preset change rate threshold, If so, it is confirmed that there is an object placed in the target container.

6. A refrigerator freshness control system, applying the refrigerator freshness control method according to any one of claims 1 to 5, characterized in that: The system includes: a temperature sensor, an oxygen monitoring sensor, a control center, a nitrogen filling device and an air pump, wherein: The temperature sensor is used to detect the real-time temperature in the target container and transmit the real-time temperature to the control center; The oxygen monitoring sensor is used to detect the oxygen concentration parameter value in the target container and transmit the oxygen concentration parameter value to the control center; The control center is configured to cool the target container when it is detected that an object has been placed in the target container. The control center is further configured to determine an oxygen concentration interval based on the oxygen concentration parameter value, and to match a duty cycle of an air pump of a nitrogen filling device in real time based on the oxygen concentration interval, so that the air pump of the nitrogen filling device operates according to the duty cycle matched in real time to replenish nitrogen to the target container.

7. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 5 are implemented.

8. An electronic device comprising a memory and a processor, characterized in that: A computer program is stored in the memory, and the processor is configured to run the computer program to execute the refrigerator freshness control method according to any one of claims 1 to 5.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the refrigerator freshness control method according to any one of claims 1 to 5 are implemented.

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