An energy-saving control system for a freezer device

Abstract

The present invention relates to an energy-saving control system for a freezer device, aiming to solve the problem of energy waste existing in the aspects of lighting, refrigeration, and monitoring of existing freezer devices. The system includes a lighting energy-saving module, a refrigeration energy-saving module, a monitoring and networking module, and a freezer interconnection configuration optimization module; the lighting energy-saving module intelligently adjusts the lighting mode according to the external light intensity, the proximity of people, and the cabinet door switch state; the refrigeration energy-saving module intelligently adjusts the refrigeration power according to factors such as the storage volume inside the cabinet, the temperature of items, business hours, and peak usage periods; the monitoring and networking module collects the internal data of the freezer and then transmits the data to the user and reminds the user to place items reasonably; the freezer interconnection configuration optimization module collects the operation data of the freezer and performs intelligent calculations to provide optimization suggestions for the use of the freezer and the placement of items. The present invention significantly reduces the energy consumption of the freezer through intelligent control, improves the operation efficiency, and has important practical significance and broad application prospects.

Description

Technical Field

[0001] The present invention relates to the technical field of energy saving for freezer equipment, and particularly to an energy saving control system for freezer equipment. Background Art

[0002] In commercial operations, freezer equipment such as beverage freezers in convenience stores is an essential facility. However, traditional freezer equipment has many problems of energy waste during operation. For example, during the night business hours, if no one buys beverages, the lighting system of the freezer still operates at full power, not only consuming a large amount of electric energy, but also having a certain impact on the internal temperature of the freezer, increasing the burden on the refrigeration system. At the same time, the temperature control method of the freezer is relatively fixed and cannot be flexibly adjusted or intelligently adjusted according to actual needs, resulting in the refrigeration system running at high load for a long time, further exacerbating energy waste. In addition, the lack of effective real-time monitoring and networking functions makes it impossible to timely grasp the operating status of the freezer and difficult to achieve precise automatic energy-saving control. Therefore, developing a control system for freezer equipment that can effectively save energy has important practical significance. Summary of the Invention

[0003] The present invention aims to solve the problem of energy waste in existing freezer equipment in aspects such as lighting, refrigeration, and monitoring, and realizes energy-saving operation of freezer equipment through an intelligent control system.

[0004] In view of the above problems, the present invention provides an energy saving control system for freezer equipment, aiming to realize energy-saving operation of freezer equipment through an intelligent control system.

[0005] In a first aspect, the present invention provides an energy saving control system for freezer equipment, the system comprising:

[0006] A lighting energy saving module, configured to intelligently adjust the lighting mode according to the first preset condition combination, the first preset condition combination including the external light intensity, whether someone approaches the freezer, and whether the door is opened to take something;

[0007] A refrigeration energy saving module, configured to intelligently adjust the freezer power according to the second preset condition combination, the second preset condition combination including the storage volume of items in the cabinet, the temperature of the items put in, whether it is business hours, and whether it is the peak usage period;

[0008] A monitoring and networking module, configured to collect internal data of the freezer, transmit the internal data of the freezer to the user, and remind the user to place items reasonably;

[0009] A freezer interconnection configuration optimization module, configured to collect data of multiple freezers, integrate the data, and provide reasonable suggestions for the user on the use of freezers and the placement of items;

[0010] Furthermore, the lighting energy saving module includes:

[0011] Light detection unit: Determine whether the external light intensity exceeds the first threshold. If so, turn off the lighting; otherwise, adjust the lighting mode to the low-brightness mode.

[0012] Human body infrared detection unit: Detect the human body movement signal within the first preset distance from the freezer. When the lighting system is in the off state and the human body infrared detection unit detects a human body movement signal, the lighting mode is adjusted to the low-brightness mode. After the human body movement signal leaves the first preset distance, the lighting system continues to illuminate for the first preset duration and then turns off; otherwise, the lighting mode remains unchanged.

[0013] Cabinet door switch detection unit: If the cabinet door is detected to be opened, adjust the lighting mode to the high-brightness mode until the cabinet door is closed; otherwise, the lighting mode remains unchanged.

[0014] Furthermore, the refrigeration energy-saving module includes:

[0015] Storage volume monitoring unit: Real-time monitor the size of the storage volume inside the cabinet through the built-in sensor. Automatically adjust the power of the refrigeration system according to the size of the storage volume. When the storage volume is lower than the first preset volume value, adjust to operate at the third refrigeration power. When the storage volume is higher than the second preset volume value, adjust to operate at the first refrigeration power. When the storage volume is higher than the first preset volume value and lower than the second preset volume value, adjust to operate at the second refrigeration power. Specifically, the built-in sensor can be an ultrasonic sensor, a laser ranging sensor, or a vision sensor.

[0016] Item temperature monitoring unit: Real-time monitor the initial temperature of the item placed through the temperature sensor set at the item inlet of the freezer. If the temperature of the item placed is higher than the current freezer temperature, increase the refrigeration power. If the temperature of the item placed is lower than the current freezer temperature, decrease the refrigeration power.

[0017] Optionally, the refrigeration power is divided into three gears, including the first refrigeration power, the second refrigeration power, and the third refrigeration power. The refrigeration powers are all system preset values. The first refrigeration power is the highest power, and the third refrigeration power is the lowest power. Increasing the refrigeration power means increasing the refrigeration power by one gear based on the current gear. If it is already the highest gear, it will not be increased. Decreasing the refrigeration power means decreasing the refrigeration power by one gear based on the current gear. If it is already the lowest gear, it will not be decreased.

[0018] Big data analysis unit: Collect and analyze the freezer usage data, and use big data technology to identify peak and off-peak periods. Increase the refrigeration power during peak periods and decrease the refrigeration power during off-peak periods.

[0019] Optionally, the data of the freezer usage includes the number of door openings and the fetching frequency. The time period divides 24 hours a day into one period every two hours. The system records the number of door openings and the fetching frequency of the freezer for each period. If the number of door openings of the freezer is greater than the first preset number or the fetching frequency is higher than the first preset frequency, it is a peak period. If the number of door openings of the freezer is less than the second preset number and the fetching frequency is lower than the second preset frequency, it is a low valley period. Otherwise, it is a regular period. The system updates the peak and low valley period data once a week.

[0020] Time control unit: Set the internal clock, preset the business hours and non-business hours. During business hours, automatically adjust the refrigeration power according to the peak and low valley periods. During non-business hours, keep running at the third refrigeration power.

[0021] Further, the monitoring and networking module includes:

[0022] Freezer monitoring unit: Real-time collect and receive the internal data of the freezer, analyze it using computer vision technology, and remotely transmit the internal data of the freezer to the user through the Internet.

[0023] User prompt unit: Judge the placement status of items during business hours. If it is detected that the item placement does not conform to at least one preset placement rule, remind the user to adjust the placement through the terminal device. When the second preset duration is left until non-business hours, remind the user to place the items on the lower layer.

[0024] Optionally, the preset placement rules include that the item shall not be within the second preset distance from the air outlet, the volume of items placed on each layer of the freezer shall not exceed the preset volume upper limit of that layer, and the volume of the upper layer items shall not exceed the volume of the lower layer items.

[0025] Further, the freezer interconnection configuration optimization module includes:

[0026] Data collection unit: Collect the number t of freezers, the maximum volume s that the i-th freezer can place items i (1 ≤ i ≤ t), the average power consumption w of the i-th freezer per day i (1 ≤ i ≤ t), count the total volume N of items in all freezers, and round the volume to the nearest ten, discarding the units digit.

[0027] Data calculation unit: Calculate the minimum power consumption and the freezer number to be selected at the minimum power consumption through a preset algorithm, and generate a configuration table of the minimum power consumption and the freezer combination number.

[0028] Optionally, the specific function of the data calculation unit is:

[0029] Convert the problem into a variant of the 0-1 knapsack problem, and select freezers to minimize the total power consumption.

[0030] Define the state:

[0031] Let dp[i][j] represent the minimum power consumption when the total volume is j in the first i freezers, with j increasing by 10 each time;

[0032] Construct the state transition equation:

[0033] For each freezer i, there are two choices: select it or not select it;

[0034] If the i-th freezer is not selected, then dp[i][j] = dp[i - 1][j];

[0035] If the i-th freezer is selected, then dp[i][j] = dp[i - 1][j - s i + w i , where s i is the maximum volume of the i-th freezer, and w i is the average power consumption of the i-th freezer;

[0036] Therefore, dp[i][j] = min(dp[i - 1][j], dp[i - 1][j - s i + w i );

[0037] Initialization:

[0038] dp[0][0] = 0, indicating that when there are no freezers, the power consumption with a total volume of 0 is 0;

[0039] For all j > 0, dp[0][j] = ∞, indicating that when there are no freezers, the power consumption with a total volume greater than 0 is ∞;

[0040] Solution:

[0041] Find dp[t][N], that is, the minimum power consumption when the total volume is N in the first t freezers;

[0042] Backtracking:

[0043] To find the selected freezer numbers, start backtracking from dp[t][N],

[0044] If dp[i][j] = dp[i - 1][j], then the i-th freezer is not selected,

[0045] If dp[i][j] = dp[i - 1][j - s i + w i , then the i-th freezer is selected, update j = j - s i ;

[0046] Record the selected freezer number and generate a configuration table of the lowest power consumption and freezer combination numbers;

[0047] User suggestion unit: Provide suggestions to the user according to the configuration table, and prompt the user to place items in the designated freezer.

[0048] In a second aspect, the present invention provides an electronic device, which is characterized by including: a processor, a memory, and a computer program stored on the memory and capable of running on the processor. When the computer program is executed by the processor, it implements each process of the above-mentioned embodiment of the energy-saving control system for a freezer device and can achieve the same technical effects.

[0049] In a third aspect, the present invention provides a computer-readable storage medium, which is characterized in that a computer program is stored on the computer-readable storage medium. When the computer program is executed by a processor, it implements each process of the above-mentioned embodiment of the energy-saving control system for a freezer device and can achieve the same technical effects.

[0050] The beneficial effects of the present invention are as follows:

[0051] Through the lighting energy-saving module, the lighting mode is intelligently adjusted according to the external light intensity, the proximity of the human body, and the cabinet door switch state, avoiding the energy waste of traditional freezers still lighting at full power when there is no one, and effectively reducing the energy consumption of the lighting system; the refrigeration energy-saving module intelligently adjusts the refrigeration power according to factors such as the storage volume in the cabinet, the temperature of the items, the business hours, and the peak usage period, avoiding the excessive energy consumption caused by the fixed power refrigeration of traditional freezers. Especially at night or during off-peak hours, the refrigeration power can be significantly reduced, achieving remarkable energy savings; the monitoring and networking module monitors the operating state of the freezer in real time, reminds the user to place items reasonably, optimizes the internal air flow circulation of the freezer, further reduces the burden on the refrigeration system, and reduces unnecessary energy consumption; the freezer interconnection configuration optimization module issues optimized suggestions for freezer selection and item placement to the user through intelligent calculation, reducing the overall power consumption. Through the above invention scheme, the energy-saving use of the freezer device is finally realized. Description of the Drawings

[0052] Figure 1 It is a functional module diagram of an energy-saving control system for a freezer device.

[0053] Figure 2 It is a flowchart of the operation of the lighting module of an energy-saving control system for a freezer device.

[0054] Figure 3 It is a flowchart of the operation of the freezer interconnection configuration optimization module of an energy-saving control system for a freezer device. Detailed Embodiments

[0055] The present invention will be further described below with reference to the drawings and embodiments.

[0056] Example 1

[0057] There are 5 beverage freezers installed in a convenience store. The volume of each freezer is 100 liters, and the average power is 300 watts. These freezers are mainly used to store beverages and other goods, and the business hours are from 8:00 am to 10:00 pm every day. During the business hours, the usage frequency of the freezers is relatively high, especially between 2:00 pm and 8:00 pm, which is the peak period for customers to buy beverages.

[0058] Configuration of lighting energy-saving module: Install a light sensor on the front panel of the freezer to detect the external light intensity, install a human infrared sensor on the front panel of the freezer to detect whether there is anyone approaching, and install a switch sensor on the freezer door to detect whether the door is open. Set the light intensity threshold to 500 lux. When the external light intensity exceeds 500 lux, turn off the freezer lighting; when it is lower than 500 lux, adjust the lighting mode to low-brightness mode; set the preset distance for human infrared detection to 1 meter. When the lighting system is in the off state and a human movement signal is detected within 1 meter, adjust the lighting mode to low-brightness mode. When the person leaves the 1-meter range of the freezer, the lighting will turn off after 10 seconds; when the door is opened, adjust the lighting mode to high-brightness mode until the door is closed.

[0059] Configuration of refrigeration energy-saving module:

[0060] Install a visual sensor inside the freezer to monitor the storage volume inside the cabinet in real time, install a temperature sensor at the inlet of the freezer to monitor the initial temperature of the items placed, set the first preset volume value of the storage volume to 30 liters, the second preset volume value to 80 liters, set the refrigeration power to three levels: the first refrigeration power is 300 watts, the second refrigeration power is 250 watts, and the third refrigeration power is 200 watts. Set the first preset number of door openings to 10 times / hour, the first preset frequency of item-taking to 15 times / hour, the second preset number to 3 times / hour, the second preset frequency to 5 times / hour, and set the internal clock to the business hours from 8:00 am to 10:00 pm. Automatically adjust the refrigeration power according to peak and off-peak periods during business hours; maintain the third refrigeration power operation during non-business hours.

[0061] Configuration of monitoring and networking module:

[0062] Install a camera inside the freezer to collect the internal data of the freezer in real time, and transmit the internal data of the freezer to the management staff of the convenience store through the Internet. Set reasonable placement rules: Items shall not be located within the second preset distance from the air outlet, the volume of items placed on each layer of the freezer shall not exceed the preset volume upper limit value of that layer, and the volume of items on the upper layer shall not exceed the volume of items on the lower layer. In this embodiment, the second preset distance is 10 cm, and the preset volume upper limit value is 80% of the volume of this layer.

[0063] Operation of the lighting energy-saving module:

[0064] When the external light intensity is relatively high, if the light sensor detects that the light intensity exceeds 500 lux, the freezer lighting is turned off. When a person approaches within 1 meter of the freezer, the PIR sensor detects the human movement signal and adjusts the lighting mode to the low-brightness mode. If the person does not perform any subsequent operations on the freezer, after the person leaves the 1-meter range of the freezer, the lighting is turned off after 10 seconds. When the person opens the freezer door, the door switch sensor detects the door opening and adjusts the lighting mode to the high-brightness mode until the door is closed. If the external light intensity is lower than 500 lux and the door is not opened, the freezer lighting system remains in the low-brightness mode.

[0065] Operation of the refrigeration energy-saving module:

[0066] During business hours, the vision sensor continuously monitors the storage volume inside the cabinet. When the storage volume is less than 30 liters, the refrigeration system automatically adjusts to operate at the third refrigeration power (200 watts). When the storage volume is higher than 80 liters, the refrigeration system adjusts to operate at the first refrigeration power (300 watts). When an item is placed in, the temperature sensor detects the initial temperature of the placed item. If the temperature of the placed item is higher than the current freezer temperature, the refrigeration power is increased by one level. If the temperature of the placed item is lower than the current freezer temperature, the refrigeration power is decreased by one level. The big data analysis unit collects and analyzes the usage data of the freezer to identify peak and off-peak periods. During peak periods (2 pm to 8 pm), the refrigeration power is increased by one level. During off-peak periods (8 am to 10 am and 9 pm to 10 pm), the refrigeration power is decreased by one level. The time control unit automatically adjusts the refrigeration power during business hours according to the internal clock setting and maintains the third refrigeration power during non-business hours.

[0067] Operation of the monitoring and networking module:

[0068] Install a high-definition camera inside the freezer to capture images and videos of the inside of the freezer in real time. The camera takes a photo or video clip of the inside of the freezer every 5 minutes. At the same time, collect data such as the temperature, humidity, and lighting status inside the freezer through sensors. Transmit the captured images, videos, and sensor data to the cloud server via the Internet. The server stores and backs up the data and provides a data interface for users to access. Users can view the operating status inside the freezer in real time through a mobile application, computer client, or web browser. The system determines whether the placement of items inside the freezer complies with the preset placement rules based on the results of computer vision technology analysis and issues a reminder to the user accordingly. In this embodiment, the second preset distance is 10 cm, and the preset volume upper limit value is 80% of the volume of this layer, so as to ensure the refrigeration effect and achieve the purpose of energy saving. The built-in clock module records the current time in real time and determines whether it is business hours. Business hours are from 8 am to 10 pm, and non-business hours are from 10 pm to 8 am the next day. In this embodiment, within business hours, it is detected that an item is 5 cm away from the air outlet, which is less than the second preset distance. The system sends a prompt message to the user through a fixed display screen or mobile application, reminding the user to adjust the placement of the item. The content example of the prompt message is: "It is detected that the items on a certain layer of the freezer block the air outlet. Please adjust them in time to ensure the refrigeration effect and energy-saving operation." When the second preset duration of 30 minutes is left until non-business hours, the system will remind the user to place the items on the lower layer in order to reduce the refrigeration power during non-business hours. The content example of the prompt message is: "There are 30 minutes left until non-business hours. Please place the items on the lower layer to optimize the energy-saving effect." After receiving the prompt message, the user can adjust the placement of the items according to the prompt. The system will monitor the adjusted placement status in real time to ensure compliance with the preset placement rules. If the user does not respond to the prompt in time, the system will repeat the reminder until the user responds.

[0069] Embodiment 2

[0070] Three beverage freezers are installed in a convenience store. The freezer interconnection configuration optimization module collects data of the three freezers, including the volume, average power, etc. of each freezer, and uses the preset dynamic programming algorithm in the system to calculate the minimum power consumption and the freezer numbers that need to be selected when the minimum power consumption occurs. Number of freezers: Count the total number of freezers in the convenience store, which is 3 in this embodiment; Freezer volume: The maximum volumes are 100 liters, 200 liters, and 300 liters respectively; The average power consumptions are 50 watts, 100 watts, and 150 watts respectively; Total volume of items: Count the total volume of items in all freezers, which is 400 liters. The current total volume is 400 liters, and the freezer numbers are from 1 to 3. At this time, the calculated dp two-dimensional table is:

[0071]

[0072] Starting from dp[t][N], that is, dp[3]

[400] , the goal is to find which freezers are selected so that the total volume is 400 liters and the power consumption is minimized. Starting from i = 3 and j = 400,

[0073] The 3rd freezer:

[0074] Currently, i = 3 and j = 400,

[0075] Check dp[3]

[400] = 200,

[0076] Check dp[2]

[400] = ∞, indicating that the 3rd freezer is selected,

[0077] Update j = j - s3 = 400 - 300 = 100, and add freezer number 3 to the selection list;

[0078] The 2nd freezer:

[0079] Currently, i = 2 and j = 100,

[0080] Check dp[2]

[100] = 50,

[0081] Check dp[1]

[100] = 50, indicating that the 2nd freezer is not selected, j remains unchanged;

[0082] The 1st freezer:

[0083] Currently, i = 1 and j = 100,

[0084] Check dp[1]

[100] = 50,

[0085] Check dp[0]

[100] = ∞, indicating that the 1st freezer is selected, add freezer number 1 to the selection list;

[0086] Generate a table of the lowest power consumption and the configuration of freezer combination numbers:

[0087] Minimum power consumption Selected cold cabinet combination number 200 watts Number 1, Number 3

[0088] The embodiments described above only represent the preferred embodiments of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications, improvements, and substitutions can be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention should be subject to the appended claims.

Claims

1. An energy-saving control system for a freezer device, characterized in that, The system includes: A lighting energy-saving module for intelligently adjusting the lighting mode of the freezer according to a first preset condition combination; A refrigeration energy-saving module for intelligently adjusting the refrigeration power of the freezer according to a second preset condition combination; A monitoring and networking module for collecting internal data of the freezer, transmitting it to the user, and reminding to place items reasonably; A freezer interconnection configuration optimization module for collecting and integrating freezer data and providing reasonable suggestions; The lighting energy-saving module includes: A light detection unit, a human body infrared detection unit, and a cabinet door switch detection unit; The refrigeration energy-saving module includes: A storage volume monitoring unit, an item temperature monitoring unit, a big data analysis unit, and a time control unit; The monitoring and networking module includes: A freezer monitoring unit and a user prompt unit; The freezer interconnection configuration optimization module includes: A data collection unit, a data calculation unit, and a user suggestion unit; The specific function of the data calculation unit is: Transform the problem into a variant of the 0-1 knapsack problem, select freezers to minimize the total power consumption, Define the state: Let dp[i][j] represent the minimum power consumption when the total volume is j among the first i freezers, and j increases by 10 each time; Construct the state transition equation: For each freezer i, there are two choices: select it or not select it; If the i-th freezer is not selected, then dp[i][j] = dp[i - 1][j]; If the $i$-th freezer is selected, then $dp[i][j]=dp[i - 1][j - s i +w i , where $s i is the maximum volume of the $i$-th freezer, and $w i is the average power consumption of the $i$-th freezer; Therefore, dp[i][j] = min(dp[i - 1][j], dp[i - 1][j - s i + w i ); Initialization: dp[0][0] = 0, indicating that when there is no freezer, the power consumption with a total volume of 0 is 0; For all j > 0, dp[0][j] = ∞, indicating that when there is no freezer, the power consumption with a total volume greater than 0 is ∞; Solve: Find dp[t][N], that is, the minimum power consumption when the total volume is N among the first t freezers; Backtracking: To find the selected freezer numbers, start backtracking from dp[t][N], If dp[i][j] = dp[i - 1][j], then the i-th freezer is not selected, If dp[i][j] = dp[i - 1][j - s i + w i , then the i-th freezer is selected, and update j = j - s i ; Record the selected freezer numbers and generate a configuration table of the lowest power consumption and freezer combination numbers.

2. The energy-saving control system for a freezer device according to claim 1, wherein, The first preset condition combination includes the external light intensity, whether there is someone approaching the freezer, and whether the door is opened to take something; The light detection unit determines whether the external light intensity exceeds a first threshold. If so, turn off the lighting; otherwise, adjust the lighting mode to the low-brightness mode; The human body infrared detection unit detects the human body movement signal within a first preset distance from the freezer. When the lighting system is in the off state and the human body infrared detection unit detects the human body movement signal, the lighting mode is adjusted to the low-brightness mode. After the human body movement signal leaves the first preset distance, the lighting system continues to illuminate for a first preset duration and then turns off; otherwise, the lighting mode remains unchanged; When the cabinet door switch detection unit detects that the cabinet door is opened, it adjusts the lighting mode to the high-brightness mode until the cabinet door is closed; otherwise, the lighting mode remains unchanged.

3. The energy-saving control system for a freezer device according to claim 1, wherein The second preset condition combination includes the size of the storage volume inside the cabinet, the temperature of the items placed, whether it is business hours, and whether it is the peak usage period; The storage volume monitoring unit monitors the size of the storage volume inside the cabinet in real time through built-in sensors, and automatically adjusts the power of the refrigeration system according to the size of the storage volume. When the storage volume is lower than the first preset volume value, it is adjusted to operate at the third refrigeration power. When the storage volume is higher than the second preset volume value, it is adjusted to operate at the first refrigeration power. When the storage volume is higher than the first preset volume value and lower than the second preset volume value, it is adjusted to operate at the second refrigeration power; The item temperature monitoring unit monitors the initial temperature of the items placed in the freezer in real time through the temperature sensors set at the item inlet of the freezer. If the temperature of the items placed is higher than the current freezer temperature, the refrigeration power is increased; if the temperature of the items placed is lower than the current freezer temperature, the refrigeration power is decreased; The big data analysis unit collects and analyzes the freezer usage data, and uses big data technology to identify peak and off-peak periods. The refrigeration power is increased during peak periods and decreased during off-peak periods; The time control unit sets an internal clock, presets business hours and non-business hours. During business hours, the refrigeration power is automatically adjusted according to peak and off-peak periods; during non-business hours, it maintains operation at the third refrigeration power.

4. The energy-saving control system of a freezer equipment according to claim 3, characterized in that The refrigeration power is divided into three levels, including the first refrigeration power, the second refrigeration power and the third refrigeration power. The refrigeration powers are all preset values of the system. The first refrigeration power is the highest power, and the third refrigeration power is the lowest power. Increasing the refrigeration power means increasing the refrigeration power by one level on the basis of the current level. If it is already the highest level, it will not be increased. Decreasing the refrigeration power means decreasing the refrigeration power by one level on the basis of the current level. If it is already the lowest level, it will not be decreased.

5. The energy-saving control system of a freezer device according to claim 3, characterized in that, The freezer usage data includes the number of door openings and the item retrieval frequency. The period divides 24 hours of a day into a period every two hours. The system records the number of door openings and the item retrieval frequency of the freezer for each period; if the number of door openings of the freezer is greater than the first preset number or the item retrieval frequency is higher than the first preset frequency, it is a peak period; if the number of door openings of the freezer is less than the second preset number and the item retrieval frequency is lower than the second preset frequency, it is an off-peak period; Otherwise, it is a regular period; the system updates the peak and off-peak period data according to a preset cycle.

6. The energy-saving control system of a freezer device according to claim 1, characterized in that, The freezer monitoring unit collects and analyzes the internal data of the freezer in real time and transmits it to the user. The user prompt unit judges the placement state of the items during business hours. If it detects that the item placement does not conform to at least one preset placement rule, it reminds the user to adjust the placement through the terminal device; when the second preset duration is left until non-business hours, it reminds the user to place the items on the lower layer; The preset placement rules include that the items shall not be within the second preset distance from the air outlet, the volume of the items placed on each layer of the freezer shall not exceed the preset volume upper limit of that layer, and the volume of the upper-layer items shall not exceed the volume of the lower-layer items.

7. The energy-saving control system of a freezer equipment according to claim 1, characterized in that, The data collection unit collects the number t of freezers, and the maximum volume s that the i-th freezer can hold items i (1 ≤ i ≤ t), and the average power consumption w of the i-th freezer per day i (1 ≤ i ≤ t). The total volume N of items in all freezers is statistically calculated, with the volume rounded to the nearest ten and the units digit discarded. The user suggestion unit prompts the user to place items in the specified freezer according to the configuration table.

8. An electronic device, characterized in that, Comprising: A processor, a memory, and a computer program stored on the memory and capable of running on the processor. When the computer program is executed by the processor, it realizes the process of an energy-saving control system for a freezer device according to any one of claims 1 to 7.

9. A computer-readable storage medium, characterized in that, A computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, it implements the process of an energy-saving control system for a freezer device according to any one of claims 1 to 7.

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