Refrigerator fresh-keeping control method and system, electronic device and storage medium

Abstract

The invention relates to a refrigerator fresh-keeping control method and system, an electronic device and a storage medium, and the refrigerator fresh-keeping control method comprises the steps that after it is detected that an object is put into a target container, the target container is cooled; acquiring real-time temperature and oxygen concentration parameter values of the target container; and when the real-time temperature is smaller than or equal to a preset temperature threshold value, cooling treatment on the target container is stopped, and a corresponding operation strategy of the nitrogen charging equipment is executed according to the detected oxygen concentration parameter value, so that the nitrogen charging equipment supplements nitrogen to the target container. According to the method, the target container is firstly cooled, the content of follow-up nitrogen charging is increased, then different nitrogen charging equipment operation strategies are executed according to different oxygen concentration parameter values, the nitrogen charging accuracy is improved, and therefore the problem that the fresh-keeping effect of the refrigerator is poor is solved.

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 of fruits and vegetables and the durability of food preservation. They not only require fruits and vegetables to remain fresh in terms of sensory perception, but also require that the nutrients of fruits and vegetables be retained to the maximum extent. At present, controlled atmosphere preservation technology has become more common. Controlled atmosphere technology uses controlled atmosphere equipment to adjust the oxygen and carbon dioxide concentrations in the fruit and vegetable drawer, and inhibits the aerobic respiration of fruits and vegetables and the consumption of their own nutrients by reducing the oxygen concentration in the storage environment and increasing the carbon dioxide concentration. Alternatively, a controlled atmosphere membrane is set up (through oxygen, blocking nitrogen) to retain an atmosphere of nitrogen-rich and oxygen-poor gas in the refrigerator drawer, thereby achieving the purpose of fruit and vegetable preservation. The control mode of the controlled atmosphere preservation system in the prior art is single and fixed. However, during actual use by users, the storage amount of fruits and vegetables varies, which will cause the intensity of the overall transpiration 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. In addition, this technical solution only adjusts the nitrogen and oxygen in the refrigerator through the controlled atmosphere membrane, and does not consider the influence 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 refrigerator preservation effect in the related art, no effective solution has been proposed yet. Summary of the invention

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

[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 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.

[0009] In some of the 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 of the embodiments, the operation strategy of the corresponding nitrogen filling equipment is executed according to the oxygen concentration parameter value obtained by detection, including:

[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 of the embodiments, before executing the operation strategy of the corresponding 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, the method further includes:

[0015] Determine whether the time from 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.

[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 preservation control system is provided in this embodiment, and the refrigerator preservation control method described in the first aspect is applied. The system includes: a temperature sensor, an oxygen monitoring sensor, a control center, a nitrogen filling device, and an air pump, wherein:

[0020] 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;

[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 down the target container when it is detected that there is an object in the target container; it is also used to execute the operation strategy of the corresponding 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, the memory stores a computer program, and the processor implements the steps of the refrigerator preservation control method described in the first aspect when executing the computer program.

[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, wherein the processor implements the refrigerator preservation control method described in the first aspect when executing the computer program.

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

[0026] Compared with the related art, the refrigerator preservation control method provided in this embodiment performs cooling treatment on the target container after detecting that an object is placed in the target container; obtains the real-time temperature and oxygen concentration parameter value of the target container; stops cooling the target container when the real-time temperature is less than or equal to the preset temperature threshold, and executes the corresponding nitrogen filling equipment operation strategy according to 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, which improves the accuracy of nitrogen filling, thereby solving the problem of poor refrigerator preservation effect.

[0027] 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 preservation 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 4 is a structural block diagram of the refrigerator fresh-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 shall have the general meaning understood by people with ordinary skills in the technical field to which this application belongs. The words "one", "a", "a", "the", "these" and the like in this application do not represent 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 directly or indirectly. The "multiple" involved in this application refers to two or more. "And / or" describes the association relationship of associated objects, indicating that there can be three relationships. For example, "A and / or B" can mean: A exists alone, A and B exist at the same time, and B exists alone. Usually, the character " / " indicates that the objects associated with each other are in an "or" relationship. The terms "first", "second", "third", etc. involved 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 hardware structure diagram of a 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 in the figure) processor 102 and memory 104 for storing data, wherein 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 can 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 as 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 the present embodiment. The processor 102 executes various functional applications and data processing by running the computer program stored in the memory 104, that is, to implement the above 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 arranged 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 a combination thereof.

[0037] The transmission device 106 is used to receive or send data via a network. The above network includes a wireless network provided by the communication provider of the terminal. In one example, the transmission device 106 includes a network adapter (Network Interface Controller, referred to as NIC), which can be connected to other network devices through a base station so as to communicate with the Internet. In one example, the transmission device 106 can be a radio frequency (Radio Frequency, referred to as RF) module, which is used to communicate with the Internet wirelessly.

[0038] In this embodiment, a refrigerator freshness control method is provided. Figure 2 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 subjected to a temperature reduction process.

[0040] Specifically, in order to better preserve objects in an existing refrigerator, a sealed container is separately provided in the refrigeration compartment of the refrigerator, and nitrogen is added to the sealed container to reduce the concentration of oxygen in the sealed container, thereby reducing the oxygen content and improving the preservation effect of the objects. Among them, one or more sealed containers can be provided, and this embodiment is explained with one of the sealed containers as the target container. When an object is detected to be placed in the target container, it will affect the temperature in the target container, causing the temperature of the local area to rise instantly. First, the increase in temperature in the target container will accelerate the corruption of food, thereby affecting the preservation of food in the refrigerator. Secondly, the change in temperature in the target container will also directly affect the density of the gas. From a microscopic perspective, when the temperature rises, the average kinetic energy of gas molecules increases, the movement of gas molecules accelerates, and the collisions between gas molecules become more frequent. Due to the intensification of the thermal motion of gas molecules, the average distance between gas molecules will increase, making the space occupied by the gas in the target container look more "full". In a fixed space, the mass of the gas remains unchanged, and the density of gas molecules decreases; when the temperature decreases, the average kinetic energy of the gas molecules decreases, the movement speed of the gas molecules slows down, and the collision frequency between gas molecules decreases. Due to the slowdown of the thermal motion of gas molecules, the average distance between gas molecules decreases. In a fixed space, the mass of the gas remains unchanged, thereby increasing the density of gas molecules. Therefore, in the target container of the same volume, in a low temperature environment, the gas density is greater, more nitrogen can be filled, and the proportion of oxygen is smaller, thereby achieving a better preservation effect. Therefore, in this embodiment, during the refrigerator preservation process, after detecting that an object is placed in the target container, the air inlet behind the target container can be opened first to transport the cold air from the refrigerated compartment to the target container to cool the target container. Alternatively, when the temperature of the refrigerated compartment is high, the compressor can be simultaneously turned on to cool the refrigerated compartment, and then the cold air can be input into 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 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.

[0043] Specifically, the real-time temperature of the target container is detected by a temperature sensor, wherein the temperature sensor may be a thermocouple, a thermistor or a non-contact type such as an infrared temperature sensor, etc. In this embodiment, an infrared temperature sensor is used to detect the real-time temperature of the target container, which may be selected according to actual conditions, and this embodiment does not specifically limit this. At the same time, the oxygen concentration parameter value in the target container is detected by an oxygen monitoring sensor, wherein the oxygen concentration parameter value is a different current signal corresponding to different oxygen concentrations.

[0044] Specifically, the target container is cooled down, and the cooling down of the target container is stopped when the real-time temperature of the target container is less than or equal to the preset temperature threshold. In general, the temperature of the refrigerator compartment is set between 2°C and 8°C. This embodiment takes into account that there is a buffering effect on the temperature during the cooling process, and the temperature of the refrigerator compartment should not be too different from that of the refrigerator compartment to prevent the excessive temperature in the target container from affecting the refrigerator compartment. Therefore, the target temperature is set within ±2°C of the refrigerator compartment temperature, that is, the target temperature is between 4°C and 10°C. Therefore, when the real-time temperature of the target container is detected to be between 4°C and 10°C, the cooling down of the target container is stopped. The nitrogen filling and preservation stage begins.

[0045] In addition, the main reason for food spoilage is the oxidation reaction with oxygen in the air. In modern food preservation technology, MAP (Modified Atmosphere Packaging) is a method to extend the shelf life of food by precisely controlling the gas composition in the package. The device that inhibits food oxidation by adding nitrogen in the refrigerator is usually called "gas control preservation technology" or "oxygen control preservation technology". This technology adjusts the gas ratio inside the refrigerator, mainly reducing the oxygen content and increasing the nitrogen ratio, to slow down the metabolism and microbial activity of food, thereby achieving the effect of extending the shelf life. In addition, there is a technology called "nitrogen lock freshness technology", which uses the chemical inertness of nitrogen to inject nitrogen into food packaging to isolate the food from the air, effectively blocking the invasion of oxygen, water vapor and microorganisms on the food, and maintaining the original taste, color and nutritional value of the food. These technologies all achieve the purpose of preservation by controlling the gas environment inside the refrigerator. They inhibit the oxidation process of food by reducing the oxygen content and increasing the nitrogen content, thereby extending the shelf life of food.

[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 to work and compresses 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 to ensure that the gas entering the target container is clean and dry. The clean and dry air then passes through a molecular sieve assembly, and the function of the molecular sieve is 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 through 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 operation strategy of the MAP component is determined by detecting the oxygen concentration parameter value in the target container. The higher the oxygen concentration parameter value is, the greater 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, when it is detected that an object is 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 the preset temperature threshold, the cooling process of 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 detection, so that the nitrogen filling equipment replenishes nitrogen to the target container. Compared with the current method of retaining the atmosphere of nitrogen-rich and oxygen-poor gas in the refrigerator drawer by setting an atmosphere-controlled film (through oxygen, blocking nitrogen), this embodiment first cools the target container after detecting that an object is placed in the target container, so that the temperature of the target container drops to a preset temperature value, and then executes the operation strategy of the corresponding nitrogen filling equipment according to the oxygen concentration parameter value obtained by detection, and replenishes nitrogen to the target container, wherein, by first cooling the target container, more nitrogen can be added to the same target container volume in the subsequent process of replenishing nitrogen, thereby achieving a lower oxygen concentration and achieving a better preservation effect, and executing different nitrogen filling strategies corresponding to different oxygen concentration parameter values, thereby improving the control accuracy and solving the problem of poor preservation effect of the current refrigerator.

[0048] In some of the 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 component is manually turned on, and because the MAP component contains many components and the connection is complicated, the working time is fixed at 40 minutes, and the next opening time interval is not less than 8 hours. The set MAP component will always detect and replenish nitrogen, and the existence of objects in the target container is not taken into account. This embodiment takes into account both energy saving and functional operation. When it is detected that there is no object in the target container, that is, when the target container is empty, no matter how high the oxygen concentration is, the nitrogen filling device will not be started, and the nitrogen filling device will be controlled to remain in a closed state to reduce resource consumption.

[0050] In another embodiment, the operation strategy of the corresponding nitrogen filling equipment is executed according to the oxygen concentration parameter value obtained by detection, including:

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

[0052] The duty cycle of the air pump of the nitrogen filling equipment is matched in real time according to the interval where the oxygen concentration is located, 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. The interval where the oxygen concentration is located is divided into a first interval, a second interval, a third interval, a fourth interval and a fifth interval, wherein the first interval is: 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.

[0053] Specifically, the oxygen monitoring sensor can output different current signals according to the different oxygen concentrations in the environment. The current signal range is designed to be between 0mA and 1mA. Generally, the current signal output by the oxygen monitoring sensor in sleep mode is ≤0.5mA, and the current signal output in working mode is between 0.5mA and 1mA. The oxygen concentration is further subdivided into five concentration ranges according to the range of 0.5mA-1mA of the current signal output under the working module. 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 where the oxygen concentration parameter value obtained by the detection is located, the corresponding duty cycle is selected to execute the nitrogen filling equipment to fill nitrogen. For example, when the oxygen detection When the oxygen concentration detected by the sensor is high, its current signal reaches 1mA, which will trigger the air pump to run at 100% duty cycle to quickly reduce the oxygen concentration. On the contrary, if the oxygen concentration is low, the current signal output by the oxygen monitoring sensor is small, and its current signal reaches 0.55mA. At this time, the air pump runs at 20% duty cycle, avoiding excessive nitrogen filling while saving energy. When the oxygen concentration continues to decrease and the output current signal continues to decrease, when it is lower than 0.5mA, the air pump stops running and the nitrogen filling equipment stops filling nitrogen. In the meantime, the oxygen concentration in the target container is detected in real time by the oxygen detection sensor, and the duty cycle of the air pump operation of the nitrogen filling equipment is dynamically controlled according to the different oxygen concentration parameter values ​​detected, thereby accurately controlling the operation of the nitrogen filling equipment, improving the nitrogen filling efficiency of the nitrogen filling equipment, preventing excessive nitrogen filling, reducing unnecessary energy waste, and saving energy.

[0054] In one embodiment, before executing the operation strategy of the corresponding 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, the method further includes:

[0055] Determine whether the time from 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.

[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 equipment damage, a time interval parameter is set before the oxygen concentration of the target container is detected and the nitrogen generator is started to fill nitrogen. This parameter is used to define the minimum rest time of the nitrogen filling device 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 time the fresh-keeping mode of the nitrogen generator ends exceeds the preset time interval of 4 hours. If it exceeds 4 hours, nitrogen is filled according to the set nitrogen filling device 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 device, that is, the nitrogen filling device 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 just placed in the target container will rapidly heat up the inside of the target container in a short period of time. The temperature of the object in the target container is detected by the red dot infrared temperature sensor as the temperature of the target container, and 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 T of the target container when detecting 0 , and then detect the real-time temperature T of the target container 3 seconds later 1 , calculate the temperature T after 3 seconds 1 With the initial real-time temperature T 0 The temperature difference is calculated to obtain a temperature change difference △T, and it is determined whether the temperature change difference △T is greater than or equal to a preset temperature difference, wherein the preset temperature difference can be set according to actual conditions, and this embodiment does not specifically limit this. In this embodiment, the temperature difference is set to 10°C. When the calculated change difference △T is greater than or equal to 10°C, it is confirmed that an object is placed in the target container. Otherwise, it is not considered that an object is placed, and it is determined that the temperature rise is caused by other circumstances, and the target container is not subjected to a cooling process.

[0061] This embodiment also provides a refrigerator freshness control method. Figure 3 FIG. 1 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 yes, execute step S302, otherwise, execute step S309;

[0063] Step S302, determine whether there is an object placed in the target container, if so, execute step S303, otherwise, execute 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 time interval, 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, stopping the operation of the air pump and stopping nitrogen filling.

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

[0071] Through the above steps S301 to S309, compared with the current method of setting a gas-adjusting film (through oxygen, blocking nitrogen) to retain an atmosphere of nitrogen-rich and oxygen-poor gas in the refrigerator drawer, this embodiment first cools the target container after detecting that an object is placed in the target container. By cooling, more nitrogen can be added to the same target container volume in the subsequent nitrogen replenishment process, thereby achieving a lower oxygen concentration and a better preservation effect. After the temperature of the target container drops to a preset temperature value, the oxygen concentration parameter value in the target container is detected by an oxygen monitoring sensor, and different levels of duty cycles are dynamically matched according to the real-time oxygen concentration parameter value obtained by the detection, and the air pump of the nitrogen-making equipment is controlled to operate, and the target container is filled with nitrogen for preservation, thereby solving the problem of poor preservation effect of the current refrigerator. Among them, when it is detected that there is no object in the target container or no object is placed, the nitrogen-making equipment is controlled to remain in a stopped state, saving energy consumption and reducing the loss of nitrogen-making equipment 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 modes, and those that have been explained will not be repeated here.

[0073] Figure 4 : is a structural block diagram of the refrigerator fresh-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 down the target container when it is detected that there is an object in the target container; it is also used to execute the operation strategy of the corresponding 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, wherein the memory stores a computer program, and the processor implements the steps of any one of the refrigerator preservation control methods in any one of the above method embodiments when executing the computer program.

[0078] In this embodiment, an electronic device is also provided, 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 one of the refrigerator preservation control methods in any one 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 perform 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 down;

[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, stop cooling the target container, and execute the operation strategy of the corresponding 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.

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

[0085] In addition, in combination with the refrigerator freshness control method provided in the above embodiments, a storage medium can also 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 refrigerator freshness control method in the above embodiments is implemented.

[0086] It should be understood that the specific embodiments described herein are only used to explain the application, rather than 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 protection scope of this application.

[0087] Obviously, the drawings are only some examples or embodiments of the present application. For ordinary technicians in the field, the present application can also be applied to other similar situations based on these drawings without creative work. In addition, it is understandable that although the work done in this development process may be complicated and lengthy, for ordinary technicians in the field, certain changes in design, manufacturing or production based on the technical content disclosed in this application are only conventional technical means and should not be regarded as insufficient content disclosed in this application.

[0088] The term "embodiment" in this application refers to a specific feature, structure or characteristic described in conjunction with the embodiment that can be included in at least one embodiment of the present application. The appearance of this phrase in various locations in the specification does not necessarily mean the same embodiment, nor does it mean that it is mutually exclusive with other embodiments and is independent or optional. It is clearly or implicitly understood by those of ordinary skill in the art that the embodiments described in this application can be combined with other embodiments without conflict.

[0089] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed 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 the memory, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetoresistive random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. As an 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 each embodiment provided in this application may include at least one of a relational database and a non-relational database. Non-relational databases may include distributed databases based on blockchains, etc., but are not limited to this. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, etc., but are not limited to this.

[0090] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of patent protection. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the scope of protection of the present application. Therefore, the scope of protection of the present application shall be subject to the attached claims.

Claims

1. A refrigerator preservation control method, characterized in that: include: When an object is detected to be placed in a target container, the target container is subjected to a temperature reduction treatment; 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 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.

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: Executing the corresponding operation strategy of the nitrogen filling equipment according to the oxygen concentration parameter value obtained by the detection includes: 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.

4. The refrigerator freshness control method according to claim 3, characterized in that: The interval in which the oxygen concentration is located is 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.

5. The refrigerator freshness control method according to claim 1, characterized in that: 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: Determine whether the time from the last time the fresh-keeping mode of the nitrogen filling device ended 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.

6. The refrigerator freshness control method according to claim 1, characterized in that: The detecting whether there is an object placed in the target container comprises: 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.

7. A refrigerator freshness control system, using the refrigerator freshness control method according to any one of claims 1 to 6, 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 used to cool down the target container when it is detected that there is an object in the target container; and 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.

8. 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 6 are implemented.

9. 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 6.

10. 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 6 are implemented.

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