Refrigeration control methods, devices, storage equipment and storage media of equipment

Abstract

This invention relates to a refrigeration control method, apparatus, storage device, and storage medium for a device. The method involves controlling a refrigeration device in a preset area of ​​a target device to cool the item at a preset cooling rate when an item is detected stored there. During the cooling process, a first temperature and humidity of the item's surface are determined based on the actual cooling rate of the item's surface. A target temperature is calculated based on the first temperature and humidity. The refrigeration device is then controlled to cool the item at the target temperature. The target device can be an energy-saving refrigerator or freezer. By adjusting the cooling rate of the refrigeration device in the target device to determine the first temperature of the item and combining it with the humidity to calculate the target temperature, the method provides preservation cooling, adapts to the characteristics of the item during the cooling process, dynamically adjusts the temperature during preservation, avoids over-freezing or insufficient temperature control, ensures preservation quality, and improves refrigeration efficiency.

Description

Technical Field

[0001] The present invention relates to the field of food preservation technology, and in particular to a refrigeration control method, device, storage equipment and storage medium for a device. Background Technology

[0002] The core of how refrigerators and other refrigeration equipment preserve meat and other food ingredients is to precisely control the temperature within the "ice temperature zone"—above freezing point and below 0°C. This temperature range significantly inhibits microbial growth and enzyme activity while preventing cell freezing, thus preserving the quality of the food to the greatest extent possible. However, controlling this temperature range is challenging; temperatures too far from freezing point reduce preservation effectiveness, while temperatures too close can easily damage the meat.

[0003] Most existing refrigerators use a fixed temperature point (such as -2℃) to uniformly control the temperature of each zone for preservation. However, different foods (such as different parts of different meats) have natural differences in freezing point, and the freezing point temperature will change during storage due to moisture loss, protein degradation, etc. Therefore, using a fixed temperature for preservation cannot adapt to this dynamic change, which can easily lead to insufficient preservation or freezing damage to meat.

[0004] In conclusion, how to dynamically adjust the preservation temperature for different ingredients in order to improve the preservation quality of ingredients has become an urgent problem to be solved. Summary of the Invention

[0005] In view of this, in order to solve the above-mentioned technical problems or some of the technical problems, the embodiments of the present invention provide a cooling control method, device, storage device and storage medium for a device.

[0006] In a first aspect, embodiments of the present invention provide a cooling control method for a device, comprising:

[0007] When an item is detected stored in a preset area of ​​the target device, the refrigeration device in the preset area is controlled to cool the item according to a preset cooling rate. During the cooling process, the first temperature of the item is determined based on the actual cooling rate of the item's surface, and the humidity of the item's surface is also determined.

[0008] The target temperature corresponding to the item is calculated based on the first temperature and the humidity, and the target temperature is used to preserve the item.

[0009] The refrigeration device is controlled to cool the item according to the target temperature.

[0010] In one possible implementation, the refrigeration device controlling the preset area cools the item according to a preset cooling rate, including:

[0011] The refrigeration device controlling the preset area refrigerates the item at a second temperature, where the second temperature is greater than the first temperature;

[0012] When the temperature of the item reaches the second temperature, the refrigeration device is controlled to cool the item according to the preset cooling rate.

[0013] In one possible implementation, determining the first temperature of the article based on the actual cooling rate of the article surface includes:

[0014] Calculate the actual cooling rate of the item at the current time point at each first time interval to obtain the actual cooling rate at multiple time points;

[0015] Calculate the actual cooling rate change at two adjacent time points, and obtain the surface temperature of the object at each time point;

[0016] When the actual cooling rate change is greater than the first threshold, determine whether the actual cooling rate of the first number of time points after the current time point is less than the second threshold.

[0017] If the determination result is yes, then the average value of the surface temperature of the item at the first number of time points is determined as the first temperature.

[0018] In one possible implementation, determining the humidity of the article surface includes:

[0019] Obtain the surface humidity of the item at each of the stated time points;

[0020] If the determination result is yes, then the average humidity of the surface of the item at the first number of time points is determined as the humidity.

[0021] In one possible implementation, calculating the target temperature corresponding to the item based on the first temperature and the humidity includes:

[0022] The target temperature is calculated using the following formula:

[0023] Tf = T × H × Q + ΔT

[0024] Wherein, Tf is the target temperature, T is the first temperature, H is the humidity, Q is the preset temperature correction coefficient, and ΔT is the preset safety threshold.

[0025] In one possible implementation, after controlling the refrigeration device to cool the article according to the target temperature, the method further includes:

[0026] If the duration of cooling the item at the target temperature is greater than the second duration, and the difference between the surface temperature of the item and the target temperature is greater than the difference threshold, the step of controlling the cooling device of the preset area to cool the item at a preset cooling rate is repeated, and / or an alarm event is triggered.

[0027] Alternatively, every third time interval, the step of cooling the item according to a preset cooling rate by the refrigeration device controlling the preset area is repeated.

[0028] In one possible implementation, the method further includes:

[0029] If ice formation is detected on the surface of the item during the cooling process at the target temperature, the target temperature is controlled to be increased by a preset temperature value.

[0030] When the target temperature corresponding to the item is calculated based on the first temperature and the humidity in the next execution, the temperature correction factor and / or the safety threshold are adjusted.

[0031] In a second aspect, embodiments of the present invention provide a refrigeration control device for an apparatus, comprising:

[0032] The first control module is used to control the cooling device of the preset area to cool the item according to a preset cooling rate when an item is detected stored in the preset area of ​​the target device. During the cooling process, the first temperature of the item is determined according to the actual cooling rate of the item surface, and the humidity of the item surface is determined.

[0033] The calculation module is used to calculate the target temperature corresponding to the item based on the first temperature and the humidity, and the target temperature is used for the preservation and storage of the item;

[0034] The second control module is used to control the refrigeration device to refrigerate the item according to the target temperature.

[0035] Thirdly, embodiments of the present invention provide a storage device, including: a processor and a memory, wherein the processor is configured to execute a cooling control program for the device stored in the memory, so as to implement the cooling control method for the device described in any one of the first aspects above.

[0036] Fourthly, embodiments of the present invention provide a storage medium storing one or more programs, which can be executed by one or more processors to implement the cooling control method of the device described in any one of the first aspects.

[0037] The refrigeration control scheme of the device provided in this invention involves controlling the refrigeration device in the preset area to cool the item at a preset cooling rate when an item is detected stored in a preset area of ​​the target device. During the refrigeration process, a first temperature and humidity of the item's surface are determined based on the actual cooling rate of the item's surface. A target temperature corresponding to the item is calculated based on the first temperature and the humidity. The refrigeration device is then controlled to cool the item according to the target temperature. Therefore, by adjusting the cooling rate of the refrigeration device to determine the first temperature of the item and combining it with the humidity to calculate the target temperature, the item can be kept fresh. This adapts to the characteristics of the item during the cooling process, dynamically adjusts the temperature during preservation, avoids over-freezing or insufficient temperature control, ensures preservation quality, and improves refrigeration efficiency. Attached Figure Description

[0038] Figure 1 A schematic flowchart illustrating a cooling control method for a device provided in an embodiment of the present invention;

[0039] Figure 2 This is a schematic diagram of the structure of the ice-temperature preservation zone of a device provided in an embodiment of the present invention;

[0040] Figure 3 A schematic flowchart of another cooling control method for a device provided in an embodiment of the present invention;

[0041] Figure 4 A schematic flowchart illustrating another cooling control method for a device provided in an embodiment of the present invention;

[0042] Figure 5 This is a schematic diagram of the food temperature-time curve during the freezing point measurement process provided in an embodiment of the present invention;

[0043] Figure 6 This is a schematic diagram of the structure of a refrigeration control device for an embodiment of the present invention;

[0044] Figure 7 This is a schematic diagram of a storage device provided in an embodiment of the present invention. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0046] To facilitate understanding of the embodiments of the present invention, further explanations and descriptions will be provided below with reference to the accompanying drawings and specific embodiments. These embodiments do not constitute a limitation on the embodiments of the present invention.

[0047] Figure 1 This is a schematic flowchart of a cooling control method for a device provided in an embodiment of the present invention, as shown below. Figure 1 As shown, the method specifically includes:

[0048] S11. When an item is detected stored in the preset area of ​​the target device, the refrigeration device of the preset area is controlled to refrigerate the item according to the preset cooling rate. During the refrigeration process, the first temperature of the item is determined according to the actual cooling rate of the item surface, and the humidity of the item surface is determined.

[0049] The refrigeration control method for the device provided in this embodiment of the invention is applied to a target device, which can be a storage device with an independent preservation compartment for storing fresh meat, seafood, and other ingredients that require preservation. For example, the target device can be an energy-saving refrigerator, freezer, refrigerated cabinet, or fresh food preservation box. Specifically, refrigeration is achieved by adjusting the cooling rate of the refrigeration device within the preservation compartment of the device. The initial temperature of the item is determined based on its actual cooling rate, and a target temperature is calculated by combining this with humidity data to preserve the item's freshness.

[0050] In this embodiment, the preset area of ​​the target device can be a preset location in the refrigerator's fresh-keeping compartment. Each fresh-keeping compartment can be divided into multiple preset areas for storing items. A pressure sensor array can be embedded in the bottom of the preset area, covering all possible locations for placing items within the preset area. The items can be food that needs to be preserved. When an item is placed in the refrigerator, the pressure sensor collects the pressure value. If the value exceeds a preset threshold (e.g., 50g), it is determined that an item is stored in the preset area at the current location.

[0051] Furthermore, a cooling device (e.g., a semiconductor cooling chip array) is installed at the bottom of each preset area. When it is determined that an item is stored in the preset area, the cooling device at the bottom of the preset area is activated and operates at a preset cooling rate (e.g., 0.1℃ / second) to cool the item. The cooling device at the bottom of the preset area where no item is stored remains in standby mode to reduce energy consumption.

[0052] During the cooling process, a contact temperature sensor (or a non-contact infrared temperature measurement module) located at the bottom of the preset area collects the surface temperature of the item once at preset intervals and generates a temperature-time curve. The system calculates the difference between two adjacent temperature measurements in real time, divides it by the time interval, and obtains the actual cooling rate at each time point when the surface temperature of the item is collected. Simultaneously, a miniature humidity sensor can be placed in the same location as the temperature sensor to synchronously collect the humidity of the item's surface.

[0053] The first temperature corresponding to the item is determined by the actual cooling rate. The first temperature represents the freezing point critical value of the item, which can be the temperature at which the actual cooling rate of the item reaches its minimum or plateau. That is, the surface temperature of the item at the time when the actual cooling rate reaches its minimum or plateau is obtained as the first temperature, and the humidity of the item surface at this time is also obtained.

[0054] In one possible implementation, a refrigeration device controlling a preset area cools the item according to a preset cooling rate, including:

[0055] The refrigeration device in the preset area is controlled to cool the item at a second temperature, which is higher than the first temperature. When the item's temperature reaches the second temperature, the refrigeration device is controlled to cool the item at a preset cooling rate.

[0056] In this embodiment, the second temperature is an initial stable temperature (e.g., 5°C) higher than the first temperature. Cooling at the second temperature allows the item to quickly approach the preservation range. Then, the cooling device is controlled to measure the first temperature at a preset cooling rate to avoid temperature fluctuations caused by direct cooling.

[0057] Specifically, when an item is placed inside, the cooling device can be controlled to operate at a second temperature to lower the surface temperature of the item to that second temperature. A temperature sensor provides real-time temperature feedback, and when the item temperature stabilizes within ±0.2℃ of the second temperature for a preset duration, the second temperature is determined to have been reached. The cooling device is then controlled to cool the item at a preset cooling rate. This avoids excessive initial temperature differences: stabilizing at the second temperature prevents rapid cooling from room temperature, which could lead to surface frost or internal temperature differences, affecting the accuracy of subsequent freezing point detection. Simultaneously, it improves the stability of the rate control, ensuring a more pronounced inflection point during the phase transition, facilitating accurate identification of the first temperature.

[0058] In one possible implementation, determining the first temperature of the article based on the actual cooling rate of the article surface includes:

[0059] The actual cooling rate of the item at the current time point is calculated at each first time interval to obtain the actual cooling rate at multiple time points; the change in actual cooling rate between two adjacent time points is calculated, and the surface temperature of the item at each time point is obtained; when the change in actual cooling rate is greater than a first threshold, it is determined whether the actual cooling rate of a first number of time points after the current time point is less than a second threshold; if the determination result is yes, the average surface temperature of the item at the first number of time points is determined as the first temperature.

[0060] In this embodiment, during the cooling process of the item, the surface temperature value T(i) of the item is collected at a fixed frequency by a temperature sensor. The instantaneous cooling rate VS(i) = [T(i) - T(i-1)] / Δt is calculated at each preset first time interval, where i represents the current time point, i-1 represents the time point when the surface temperature of the item was last acquired, i-1 is the start point of the first time interval, i is the end point of the first time interval, and Δt is the first time interval. VS(i) is used as the actual cooling rate at the current time point (i).

[0061] For every two adjacent time points, the change in actual cooling rate ΔVS(i) = VS(i) - VS(i-1) is calculated based on the actual cooling rate at the two time points, where VS(i-1) is the actual cooling rate at the previous time point (i-1).

[0062] When the value of ΔVS(i) exceeds a preset first threshold, it is determined that the temperature curve is about to enter a plateau period. The first threshold can be a positive threshold ΔVS0 (e.g., ΔVS0 = 0.005℃ / s). Subsequently, it is checked whether the absolute value of the actual cooling rate (VS(i)) at the subsequent first consecutive number of time points is less than a preset second threshold. The second threshold can be VS0 (e.g., VS0 = 0.005℃ / s). If the change in the actual cooling rate is greater than the first threshold and the actual cooling rate at the subsequent first consecutive number of time points is less than the second threshold, it is determined that the actual cooling rate of the object surface temperature has entered a plateau period and reached its minimum value. The average temperature of the object surface at the first consecutive number of time points is recorded as the first temperature T.

[0063] In one possible implementation, determining the humidity of the article surface includes:

[0064] Obtain the surface humidity of the item at each time point; if the judgment result is yes, then determine the average surface humidity of the item at the first number of time points as the humidity.

[0065] In this embodiment, similar to the method used to determine the first temperature of the item in the above embodiments, during the cooling process of the item, the surface temperature value T(i) of the item measured by the temperature sensor is collected at a fixed frequency, and the surface humidity of the item is also collected at each collection time point. After the actual cooling rate of the item surface temperature reaches a plateau period as determined by the above-mentioned change in the actual cooling rate, the average humidity of the multiple item surface humidity collected at a first number of time points is recorded as humidity H.

[0066] S12. Calculate the target temperature corresponding to the item based on the first temperature and humidity.

[0067] In this embodiment, the target temperature must be a precise temperature control value that adapts to the ice-temperature preservation requirements of the items, balancing the preservation effect with the prevention of frostbite, and meeting the core requirements of ice-temperature preservation above freezing point and below 0°C. The target temperature is calculated based on the phase transition critical temperature (first temperature) of the items, and is corrected by incorporating the influence of humidity on the freezing point. At the same time, a safety threshold is introduced to avoid over-freezing and damaging the items.

[0068] In one possible implementation, the target temperature is calculated using the following formula:

[0069] Tf = T × H × Q + ΔT

[0070] Where Tf is the target temperature, T is the first temperature, which reflects the actual phase transition critical value of the item and is the basis for calculation, H is the humidity, which can be converted to a decimal for calculation (e.g., 93% → 0.93), Q is the temperature correction coefficient under the preset humidity (default setting is 1.3431), and ΔT is the preset safety threshold, which can be adjusted according to the type of food (e.g., 0.3℃~0.5℃ for seafood and 0.5℃~0.8℃ for red meat) to ensure that the temperature is higher than the actual freezing point.

[0071] S13. Control the refrigeration device to cool the items according to the target temperature.

[0072] In this embodiment, the refrigeration device is controlled to run continuously for a period of time based on the target temperature to ensure that the temperature of the item is stably maintained within ±0.1℃ of the target temperature, thus balancing refrigeration efficiency and temperature control accuracy.

[0073] Specifically, the cooling device uses a semiconductor cooling chip array paired with a PID controller (proportional-integral-derivative control). The target temperature Tf is sent to the PID controller, which drives the corresponding semiconductor cooling chip to operate at 50% of its initial power to quickly approach the target temperature. The temperature sensor collects the surface temperature Ts of the object every second and compares it with Tf to calculate the temperature difference ΔTs = Ts - Tf: If ΔTs > the preset first temperature difference threshold of 0.1℃ (temperature too high): the controller increases the cooling power (in 5% increments) to accelerate cooling; if ΔTs < the preset second temperature difference threshold of -0.1℃ (temperature too low): the controller decreases the cooling power (in 5% increments) or switches to heat preservation mode; if |ΔTs| ≤ 0.1℃ (temperature stable): the current cooling power is maintained. If the temperature difference exceeds the preset third temperature difference threshold of 0.3℃ for 10 consecutive seconds (e.g., due to sensor failure), the system will trigger an alarm and switch to the backup temperature control mode to run at the historical target temperature for the same product category. Alternatively, it will re-execute the first temperature and humidity judgment, recalculate the target temperature, update Tf and synchronize it to the PID controller to adapt to the temperature control requirements changes caused by the freezing point drift of the food during storage.

[0074] In one possible implementation, after controlling the refrigeration device to cool the article according to the target temperature, the method further includes:

[0075] If the duration of cooling the item at the target temperature is longer than the second duration, and the difference between the item's surface temperature and the target temperature is greater than the difference threshold, the step of cooling the item at a preset cooling rate by the refrigeration device in the preset control area is repeated, and / or an alarm event is triggered.

[0076] Alternatively, every third time interval, the step of cooling the items according to the preset cooling rate by the refrigeration device in the preset area is repeated.

[0077] In this embodiment, the cooling device can be a semiconductor cooling chip. The second duration is a preset duration based on the cooling effect of the cooling device, adapted to the normal time required for the semiconductor cooling chip to stabilize the temperature of the item to the target temperature, thus avoiding premature judgment of cooling abnormality. The difference threshold can be a preset value that matches the accuracy requirement of ice-temperature preservation (for example, matching the accuracy requirement of ice-temperature preservation temperature ±0.1℃, as the difference threshold to reduce false judgments).

[0078] Specifically, after the controller issues the target temperature command, it starts a timer to record the cooling time to the target temperature, while the temperature sensor collects and uploads the surface temperature Ts of the item in real time. When the timer shows a duration greater than the second duration (e.g., 30 minutes), the controller calculates the temperature difference ΔTs = |Ts - target temperature|. If ΔTs ≤ the difference threshold (e.g., 0.3℃), the current cooling power is maintained, and the timer continues to count. If ΔTs > the difference threshold, the system enters the abnormal handling phase. The process of controlling the cooling device to cool at the preset cooling rate and determining the first temperature and humidity to recalculate the target temperature is repeated, and then cooling is performed at the new target temperature to adapt to the freezing point drift of the food. If, after determining the new target temperature and performing cooling twice consecutively, the cooling time still exceeds the second duration and ΔTs exceeds the difference threshold, the controller activates the alarm module: in a home scenario, an audible and visual alarm is triggered, and a notification indicating a temperature control abnormality is pushed to the bound APP, requesting the device to be checked; in a commercial scenario, an alarm log is recorded and synchronized to the backend management system.

[0079] Alternatively, after the target temperature is reached and stabilized for the first time, the timer triggers a retest command every three preset time intervals (e.g., 48 hours) without manual intervention. The retest execution involves controlling the refrigeration unit to cool at a preset cooling rate, determining the first temperature and humidity, recalculating the target temperature, and updating the temperature control parameters to adapt to the changes in the characteristics of the food after long-term storage.

[0080] In one possible implementation, the method further includes:

[0081] If ice formation is detected on the surface of the item during the cooling process at the target temperature, the target temperature is increased by the preset temperature value. In the next execution of the calculation of the target temperature of the item based on the first temperature and humidity, the temperature correction coefficient and / or safety threshold are adjusted.

[0082] In this embodiment, after the controller issues the target temperature command, the surface temperature Ts and icing status of the object are collected in real time and uploaded during the cooling process through temperature sensors, icing sensors, and image acquisition devices. If icing is detected on the surface of the object, the target temperature is increased by a preset temperature value (e.g., 0.3℃). After confirming that the icing has been removed, the cooling operation is resumed. At the same time, the "icing event" and parameters such as the current target temperature, first temperature, and humidity are recorded for subsequent parameter adjustments.

[0083] When calculating the target temperature again, if there are historical icing events, the temperature correction factor Q and / or the safety threshold ΔT will be adjusted. Q can be decreased by 0.05~0.1 (e.g., from 1.3431 to 1.2931), and ΔT can be increased by 0.1~0.2℃ (e.g., from 0.6℃ to 0.7℃). If there are no icing events, the original parameters will be maintained. Adjusting these parameters improves the reasonableness of the target temperature and prevents recurrence of icing.

[0084] This invention utilizes a pressure sensor array to detect whether food has been placed in the food and its specific location. Semiconductor cooling chips are installed in multiple localized areas on the inner wall of the preservation zone to achieve rapid and precise temperature control of the food placement area. By acquiring temperature data Tt at high frequency and analyzing the slope or derivative changes of the temperature curve in real time, inflection points or plateaus where the rate of temperature decrease slows significantly are identified, thereby determining the critical freezing point T of the meat. Humidity directly affects the moisture content of the food, thus affecting the freezing point temperature. A humidity sensor detects the surface humidity H of the food, and a freezing point temperature calculation model Tf = T × H × Q + ΔT is constructed based on the calculated critical freezing point temperature. The temperature of the food is then precisely controlled according to the calculated freezing point temperature Tf. During storage, the freezing point of meat may drift due to factors such as juice loss and protein degradation. The system automatically re-detects the freezing point and updates the Tf value every 48 hours, thereby achieving dynamic adjustment of the freezing point during the food preservation process and achieving full-cycle adaptive preservation control.

[0085] like Figure 2 The diagram shown is a structural schematic of the ice-temperature preservation zone of a device provided in an embodiment of the present invention. Figure 2As shown, the structure specifically includes: 1. a chilled preservation zone; 2. a pressure sensor module, used to determine whether an item is placed in each position; 3. a thermoelectric cooler, i.e., a cooling device used to cool the items; 4. a temperature sensor, used to detect the surface temperature of the items; and 5. a humidity sensor, used to detect the surface humidity of the items. The bottom of the chilled preservation zone 1 is equipped with a pressure sensor module 2, forming the bottom surface of the chilled preservation zone 1 in the form of a tray, where food can be placed to detect pressure. Within the bottom space formed by the pressure sensor module 2, an array of thermoelectric coolers 3 is evenly arranged, uniformly covering the entire bottom surface of the chilled preservation zone 1. Temperature sensors 4 and humidity sensors 5 are located in the area of ​​the thermoelectric coolers 3 to detect the surface temperature and humidity of the food.

[0086] like Figure 3 The diagram shown is a schematic flowchart of another cooling control method for a device provided in an embodiment of the present invention. Figure 3 As shown, the method specifically includes:

[0087] Step 1: After the pressure sensor detects food being placed in the preservation zone, it determines the food's position based on the pressure value. The semiconductor cooling chip at that position begins cooling at 5°C until the food's surface temperature stabilizes at 5°C. This ensures that each freezing point measurement is performed under uniform initial thermodynamic conditions. It also provides a safe and reliable starting point for entering the controllable linear cooling phase, avoiding uncontrolled cooling rates or localized overcooling due to uncertain initial conditions. Temperatures above 0°C are acceptable, and the lower the temperature, the shorter the freezing point measurement time.

[0088] Step 2: The semiconductor cooling chip slowly cools the food at a constant rate V0, calculates the rate of temperature change on the surface of the food, records the temperature T when the rate of temperature change reaches its lowest point, detects the surface humidity H of the food at this time, and calculates the freezing point temperature of the food Tf = T × H × Q + ΔT, and controls the cooling chip to operate at Tf.

[0089] Step 3: Repeat step 2 every 48 hours.

[0090] like Figure 4 The diagram shown is a schematic flowchart of another cooling control method for a device provided in an embodiment of the present invention. Figure 4 As shown, the method specifically includes:

[0091] Step 1: The pressure sensor detects the pressure value U within the zone.

[0092] Step 2: When the pressure value U exceeds the pressure threshold U0, the thermoelectric cooler in that pressure region begins to operate. The cooler maintains a temperature control of 5°C until the food temperature at the sensor contact point stabilizes at 5°C.

[0093] Step 3: Control the thermoelectric cooler to cool at a rate of V0.

[0094] Step 4: Collect the surface temperature of the food in real time using a temperature sensor, and calculate the cooling rate of the food surface in real time: Vs=dT / dt

[0095] Step 5: When the Vs value reaches its lowest point, record the temperature T at this time, detect the surface humidity H of the food, and calculate the freezing point temperature Tf = T × H × Q + ΔT, where Q is the temperature correction coefficient under humidity, and ΔT is a preset safety threshold. This value ensures that the temperature is always above the freezing point, but infinitely close to the freezing point, within the optimal preservation range. Specifically, 50g ≤ U0 ≤ 100g, V0 = 0.1℃ / second, Q = 1.3431, and 0.3℃ ≤ ΔT ≤ 0.8℃.

[0096] Step 6: The semiconductor refrigeration chip in this area is cooled according to Tf.

[0097] Step 7: Repeat steps 3, 4, 5, and 6 every 48 hours.

[0098] The method provided in this invention utilizes a localized semiconductor cooling chip and pressure sensor positioning mechanism to control the temperature only in the area where the food is placed, avoiding the lag and unevenness of overall cooling and improving response speed and control accuracy. The freezing point of the food is determined by calculating the rate of temperature change on the food's surface, and a freezing point calculation model is established by combining humidity data to dynamically adjust the control temperature point, ensuring the meat is always within the optimal preservation temperature range. The freezing point parameters are periodically and automatically updated to ensure the control system can adapt to changes in the freezing point of the meat caused by protein decomposition, juice seepage, etc., achieving full-cycle preservation.

[0099] Figure 5 This invention provides a schematic diagram of the food temperature-time curve during freezing point measurement. The temperature change of the food during the cooling process is divided into three parts:

[0100] 1. Linear descent region: such as Figure 5 As shown, within the time frame of 0-50 seconds, the temperature of the food decreased almost linearly over time.

[0101] 2. Phase Transition Plateau / Inflection Point: Within approximately 50-80 seconds, the rate of temperature decrease slows dramatically, forming a distinct plateau or inflection point. The temperature stabilizes for a short period near a specific value (approximately -0.8°C in this example). When the temperature drops to this point, the water within the meat cells begins to freeze. This phase transition releases a large amount of latent heat, which precisely offsets the continuous cooling output of the thermoelectric cooler, preventing the temperature from decreasing further and creating a plateau on the curve. This temperature is the critical freezing point of the food. Therefore, the control system can identify the moment when this slope suddenly approaches zero by calculating the instantaneous slope (dT / dt) in real time. The temperature value corresponding to this moment (-0.8°C) is the measured critical freezing point of the meat.

[0102] 3. Continued cooling zone: After 80 seconds, the plateau period ends, and the local moisture at the measurement point has completely frozen into ice. The phase transition ends, and no more latent heat is released; therefore, the temperature continues to decrease at a steady rate.

[0103] Figure 6 A schematic diagram of the structure of a refrigeration control device for an embodiment of the present invention is provided, comprising:

[0104] The first control module 61 is used to control the refrigeration device of the preset area to cool the item according to a preset cooling rate when an item is detected stored in the preset area of ​​the target device. During the cooling process, the first temperature of the item is determined according to the actual cooling rate of the item surface, and the humidity of the item surface is determined.

[0105] Calculation module 62 is used to calculate the target temperature corresponding to the item based on the first temperature and the humidity;

[0106] The second control module 63 is used to control the refrigeration device to refrigerate the item according to the target temperature.

[0107] In one possible implementation, the first control module is specifically used to control the refrigeration device of the preset area to refrigerate the item at a second temperature, wherein the second temperature is greater than the first temperature;

[0108] When the temperature of the item reaches the second temperature, the refrigeration device is controlled to cool the item according to the preset cooling rate.

[0109] In one possible implementation, the first control module is specifically used to calculate the actual cooling rate of the item at the current time point at each first time interval, and obtain the actual cooling rate at multiple time points.

[0110] Calculate the actual cooling rate change at two adjacent time points, and obtain the surface temperature of the object at each time point;

[0111] When the actual cooling rate change is greater than the first threshold, determine whether the actual cooling rate of the first number of time points after the current time point is less than the second threshold.

[0112] If the determination result is yes, then the average value of the surface temperature of the item at the first number of time points is determined as the first temperature.

[0113] In one possible implementation, the first control module is specifically used to acquire the surface humidity of the item at each of the said time points;

[0114] If the determination result is yes, then the average humidity of the surface of the item at the first number of time points is determined as the humidity.

[0115] In one possible implementation, the calculation module is specifically used to calculate the target temperature using the following formula:

[0116] Tf = T × H × Q + ΔT

[0117] Wherein, Tf is the target temperature, T is the first temperature, H is the humidity, Q is the preset temperature correction coefficient, and ΔT is the preset safety threshold.

[0118] In one possible implementation, the first control module is further configured to, when the duration of cooling the item at the target temperature is greater than the second duration, and the difference between the surface temperature of the item and the target temperature is greater than the difference threshold, repeatedly execute the step of controlling the cooling device of the preset area to cool the item at a preset cooling rate, and / or trigger an alarm event.

[0119] Alternatively, every third time interval, the step of cooling the item according to a preset cooling rate by the refrigeration device controlling the preset area is repeated.

[0120] In one possible implementation, the first control module is further configured to, during the process of cooling the item according to the target temperature, if ice formation is detected on the surface of the item, control the target temperature to increase by a preset temperature value.

[0121] When the target temperature corresponding to the item is calculated based on the first temperature and the humidity in the next execution, the temperature correction factor and / or the safety threshold are adjusted.

[0122] The device provided in this embodiment may be as follows: Figure 6 The apparatus shown can perform, as Figure 1All steps of the method, thus achieving Figure 1 For details on the technical effects of the method shown, please refer to [link / reference]. Figure 1 The relevant descriptions are presented concisely and will not be elaborated upon here.

[0123] Figure 7 This is a schematic diagram of the structure of a storage device provided in an embodiment of the present invention. Figure 7 The storage device 400 shown includes at least one processor 401, a memory 402, at least one network interface 404, and other user interfaces 403. The various components in the storage device 400 are coupled together via a bus system 405. It is understood that the bus system 405 is used to implement communication between these components. In addition to a data bus, the bus system 405 also includes a power bus, a control bus, and a status signal bus. However, for clarity, ... Figure 7 The general designated all buses as Bus System 405.

[0124] The user interface 403 may include a display, keyboard, or clicking device (e.g., mouse, trackball, touchpad, or touchscreen).

[0125] It is understood that the memory 402 in the embodiments of the present invention can be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. The non-volatile memory can be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. The volatile memory can be random access memory (RAM), which is used as an external cache. By way of example, but not limitation, many forms of RAM are available, such as Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced Synchronous DRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), and Direct Rambus RAM (DRRAM). The memory 402 described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0126] In some implementations, memory 402 stores elements, executable units or data structures, or subsets thereof, or extended sets thereof: operating system 4021 and application program 4022.

[0127] The operating system 4021 includes various system programs, such as the framework layer, core library layer, and driver layer, used to implement various basic business functions and handle hardware-based tasks. The application program 4022 includes various applications, such as a media player and a browser, used to implement various application functions. The program implementing the method of this embodiment can be included in the application program 4022.

[0128] In this embodiment of the invention, by calling the program or instructions stored in the memory 402, specifically the program or instructions stored in the application program 4022, the processor 401 executes the method steps provided in each method embodiment, including, for example:

[0129] When an item is detected stored in a preset area of ​​the target device, the refrigeration device in the preset area is controlled to cool the item according to a preset cooling rate. During the cooling process, the first temperature of the item is determined based on the actual cooling rate of the item's surface, and the humidity of the item's surface is also determined.

[0130] Calculate the target temperature corresponding to the item based on the first temperature and the humidity;

[0131] The refrigeration device is controlled to cool the item according to the target temperature.

[0132] In one possible implementation, a refrigeration device controlling the preset area cools the item at a second temperature, which is greater than the first temperature;

[0133] When the temperature of the item reaches the second temperature, the refrigeration device is controlled to cool the item according to the preset cooling rate.

[0134] In one possible implementation, the actual cooling rate of the item at the current time point is calculated at each first time interval to obtain the actual cooling rate at multiple time points;

[0135] Calculate the actual cooling rate change at two adjacent time points, and obtain the surface temperature of the object at each time point;

[0136] When the actual cooling rate change is greater than the first threshold, determine whether the actual cooling rate of the first number of time points after the current time point is less than the second threshold.

[0137] If the determination result is yes, then the average value of the surface temperature of the item at the first number of time points is determined as the first temperature.

[0138] In one possible implementation, the surface humidity of the item is obtained at each of the said time points;

[0139] If the determination result is yes, then the average humidity of the surface of the item at the first number of time points is determined as the humidity.

[0140] In one possible implementation, the target temperature is calculated using the following formula:

[0141] Tf = T × H × Q + ΔT

[0142] Wherein, Tf is the target temperature, T is the first temperature, H is the humidity, Q is the preset temperature correction coefficient, and ΔT is the preset safety threshold.

[0143] In one possible implementation, when the duration of cooling the item at the target temperature is greater than the second duration, and the difference between the surface temperature of the item and the target temperature is greater than the difference threshold, the step of controlling the cooling device of the preset area to cool the item at a preset cooling rate is repeated, and / or an alarm event is triggered.

[0144] Alternatively, every third time interval, the step of cooling the item according to a preset cooling rate by the refrigeration device controlling the preset area is repeated.

[0145] In one possible implementation, if ice formation is detected on the surface of the item during the cooling process at the target temperature, the target temperature is controlled to be increased by a preset temperature value.

[0146] When the target temperature corresponding to the item is calculated based on the first temperature and the humidity in the next execution, the temperature correction factor and / or the safety threshold are adjusted.

[0147] The methods disclosed in the above embodiments of the present invention can be applied to processor 401, or implemented by processor 401. Processor 401 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method can be completed by the integrated logic circuit of the hardware in processor 401 or by instructions in the form of software. The processor 401 may be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. It can implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of the present invention. The general-purpose processor may be a microprocessor or any conventional processor. The steps of the methods disclosed in the embodiments of the present invention can be directly embodied in the execution of a hardware decoding processor, or executed by a combination of hardware and software units in the decoding processor. The software units may be located in random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, or other mature storage media in the art. The storage medium is located in memory 402. Processor 401 reads the information in memory 402 and, in conjunction with its hardware, completes the steps of the above method.

[0148] It is understood that the embodiments described herein can be implemented in hardware, software, firmware, middleware, microcode, or a combination thereof. For hardware implementation, the processing unit can be implemented in one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field-programmable gate arrays (FPGAs), general-purpose processors, controllers, microcontrollers, microprocessors, other electronic units for performing the functions described herein, or combinations thereof.

[0149] For software implementation, the techniques described herein can be implemented by units that perform the functions described herein. The software code can be stored in memory and executed by a processor. The memory can be implemented in the processor or external to the processor.

[0150] The storage device provided in this embodiment can be as follows: Figure 7 The device shown can perform, for example Figure 1 All steps of the method, thus achieving Figure 1 For details on the technical effects of the method shown, please refer to [link / reference]. Figure 1 The relevant descriptions are presented concisely and will not be elaborated upon here.

[0151] This invention also provides a storage medium (computer-readable storage medium). This storage medium stores one or more programs. The storage medium may include volatile memory, such as random access memory; it may also include non-volatile memory, such as read-only memory, flash memory, hard disk, or solid-state drive; and it may also include combinations of the above types of memory.

[0152] When one or more programs in the storage medium can be executed by one or more processors to implement the above-described cooling control method for the device executed on the device side.

[0153] The processor is used to execute a device cooling control program stored in the memory to implement the following steps of a device cooling control method executed on the device side:

[0154] When an item is detected stored in a preset area of ​​the target device, the refrigeration device in the preset area is controlled to cool the item according to a preset cooling rate. During the cooling process, the first temperature of the item is determined based on the actual cooling rate of the item's surface, and the humidity of the item's surface is also determined.

[0155] Calculate the target temperature corresponding to the item based on the first temperature and the humidity;

[0156] The refrigeration device is controlled to cool the item according to the target temperature.

[0157] In one possible implementation, a refrigeration device controlling the preset area cools the item at a second temperature, which is greater than the first temperature;

[0158] When the temperature of the item reaches the second temperature, the refrigeration device is controlled to cool the item according to the preset cooling rate.

[0159] In one possible implementation, the actual cooling rate of the item at the current time point is calculated at each first time interval to obtain the actual cooling rate at multiple time points;

[0160] Calculate the actual cooling rate change at two adjacent time points, and obtain the surface temperature of the object at each time point;

[0161] When the actual cooling rate change is greater than the first threshold, determine whether the actual cooling rate of the first number of time points after the current time point is less than the second threshold.

[0162] If the determination result is yes, then the average value of the surface temperature of the item at the first number of time points is determined as the first temperature.

[0163] In one possible implementation, the surface humidity of the item is obtained at each of the said time points;

[0164] If the determination result is yes, then the average humidity of the surface of the item at the first number of time points is determined as the humidity.

[0165] In one possible implementation, the target temperature is calculated using the following formula:

[0166] Tf = T × H × Q + ΔT

[0167] Wherein, Tf is the target temperature, T is the first temperature, H is the humidity, Q is the preset temperature correction coefficient, and ΔT is the preset safety threshold.

[0168] In one possible implementation, when the duration of cooling the item at the target temperature is greater than the second duration, and the difference between the surface temperature of the item and the target temperature is greater than the difference threshold, the step of controlling the cooling device of the preset area to cool the item at a preset cooling rate is repeated, and / or an alarm event is triggered.

[0169] Alternatively, every third time interval, the step of cooling the item according to a preset cooling rate by the refrigeration device controlling the preset area is repeated.

[0170] In one possible implementation, if ice formation is detected on the surface of the item during the cooling process at the target temperature, the target temperature is controlled to be increased by a preset temperature value.

[0171] When the target temperature corresponding to the item is calculated based on the first temperature and the humidity in the next execution, the temperature correction factor and / or the safety threshold are adjusted.

[0172] Those skilled in the art will further recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of hardware and software, the components and steps of the various examples have been generally described in terms of functionality in the foregoing description. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of this invention.

[0173] The steps of the methods or algorithms described in conjunction with the embodiments disclosed herein can be implemented in hardware, a software module executed by a processor, or a combination of both. The software module can be located in random access memory (RAM), main memory, read-only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, removable disk, CD-ROM, or any other form of storage medium known in the art.

[0174] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method of refrigeration control of an appliance, characterized by, The method comprises the following steps: When detecting that an object is placed in a preset area of a target device, a refrigeration device of the preset area is controlled to refrigerate the object at a preset cooling rate, a first temperature of the object is determined according to an actual cooling rate of a surface of the object during the refrigeration process, and a humidity of the surface of the object is determined, wherein the first temperature represents a freezing point critical value of the object; A target temperature corresponding to the object is calculated according to the first temperature and the humidity, and the target temperature is used for refrigeration storage of the object; The refrigeration device is controlled to refrigerate the object at the target temperature; The step of controlling the refrigeration device of the preset area to refrigerate the object at the preset cooling rate comprises the following steps: The refrigeration device of the preset area is controlled to refrigerate the object at a second temperature, wherein the second temperature is greater than the first temperature; When the temperature of the object reaches the second temperature, the refrigeration device is controlled to refrigerate the object at the preset cooling rate; The step of determining the first temperature of the object according to the actual cooling rate of the surface of the object comprises the following steps: The actual cooling rate of the object at a current time point is calculated every first time interval, and the actual cooling rates at multiple time points are obtained; The actual cooling rate change amounts of two adjacent time points are calculated respectively, and the surface temperature of the object at each time point is obtained; When the actual cooling rate change amount is greater than a first threshold value, it is determined whether the actual cooling rates of a first number of time points after the current time point are all less than a second threshold value; If the determination result is yes, the average value of the surface temperatures of the object at the first number of time points is determined as the first temperature; The step of determining the humidity of the surface of the object comprises the following steps: The surface humidity of the object at each time point is obtained; If the determination result is yes, the average value of the surface humidities of the object at the first number of time points is determined as the humidity.

2. The method of claim 1, wherein, The step of calculating the target temperature corresponding to the object according to the first temperature and the humidity comprises the following steps: The target temperature is calculated by the following formula: Tf=T×H×Q+ΔT Wherein, Tf is the target temperature, T is the first temperature, H is the humidity, Q is a preset temperature correction coefficient, and ΔT is a preset safety threshold value.

3. The method of claim 1, wherein, After the step of controlling the refrigeration device to refrigerate the object at the target temperature, the method further comprises the following steps: When the time length of refrigerating the object at the target temperature is greater than a second time length, and the difference between the surface temperature of the object and the target temperature is greater than a difference threshold value, the step of controlling the refrigeration device of the preset area to refrigerate the object at the preset cooling rate is repeatedly executed, and / or an alarm event is triggered; Or, the step of controlling the refrigeration device of the preset area to refrigerate the object at the preset cooling rate is repeatedly executed every third time interval.

4. The method of claim 2, wherein, The method further comprises the following steps: During the refrigeration of the object at the target temperature, if it is detected that ice is formed on the surface of the object, the target temperature is controlled to be increased by a preset temperature value. At the next execution of the calculation of the target temperature corresponding to the article according to the first temperature and the humidity, the temperature correction coefficient and / or the safety threshold are adjusted.

5. A refrigeration control apparatus for an appliance, characterized by: The method comprises the following steps: The first control module is configured to control the refrigeration device of the preset area to refrigerate the article at a preset cooling rate when it is detected that the article is stored in the preset area of the target device, determine a first temperature of the article according to an actual cooling rate of the surface of the article during the refrigeration process, and determine the humidity of the surface of the article, wherein the first temperature represents a freezing point critical value of the article. The calculation module is configured to calculate a target temperature corresponding to the article according to the first temperature and the humidity, wherein the target temperature is used for fresh-keeping storage of the article. The second control module is configured to control the refrigeration device to refrigerate the article at the target temperature. The first control module is specifically configured to control the refrigeration device of the preset area to refrigerate the article at a second temperature, wherein the second temperature is greater than the first temperature. When the temperature of the article reaches the second temperature, the refrigeration device is controlled to refrigerate the article at the preset cooling rate. The first control module is specifically configured to calculate the actual cooling rate of the article at a current time point every first time interval to obtain actual cooling rates at multiple time points. The actual cooling rate variation of two adjacent time points is calculated respectively, and the surface temperature of the article at each time point is obtained. When the actual cooling rate variation is greater than a first threshold, it is determined whether the actual cooling rates of a first number of time points after the current time point are all less than a second threshold. If the determination result is yes, the average of the surface temperatures of the article at the first number of time points is determined as the first temperature. The surface humidity of the article at each time point is obtained. If the determination result is yes, the average of the surface humidity of the article at the first number of time points is determined as the humidity.

6. A storage device, characterized by The method comprises the following steps: The processor is configured to execute a refrigeration control program of the device stored in the memory to implement the refrigeration control method of the device according to any one of claims 1-4.

7. A storage medium, characterized by The storage medium stores one or more programs, which can be executed by one or more processors to implement the refrigeration control method of the device according to any one of claims 1-4.

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