A refrigerator power detection safety control system and method

Abstract

This invention discloses a refrigerator power detection safety control system and method, belonging to the field of smart home appliance control technology. The system includes a main control board, multiple power detection units, multiple switching elements, and a controller. The main control board has multiple load interfaces for connecting different loads to the refrigerator. Each power detection unit is located at its corresponding load interface and is used to detect the power parameters of the connected load in real time. The switching elements are used to control the on / off power supply to the corresponding load or the entire refrigerator. The controller is communicatively connected to each power detection unit and each switching element. In response to the switching elements of the entire refrigerator being turned on, the controller acquires the active power detected by each power detection unit, compares the active power with a preset power threshold to generate a comparison result, and outputs a safety control command based on the comparison result. The safety control command is used to control the switching elements to perform power on / off operations. This application achieves independent power monitoring and graded power-off control for each load.

Description

Technical Field

[0001] This application relates to the field of smart home appliance control technology, and in particular to a refrigerator power detection safety control system and method. Background Technology

[0002] As an essential household appliance for food preservation, a refrigerator integrates multiple load modules such as a fan, heater, and compressor. These loads work together to maintain the refrigerator's normal cooling and preservation functions. During operation, if the actual power of any load far exceeds its rated power, it may cause circuit overload and overheating, potentially leading to insulation damage, short circuits, or even fires, posing a threat to household electrical circuits and personal safety.

[0003] One existing technology for refrigerator power detection involves acquiring the initial power of the refrigerator using electronic equipment, determining a second power based on the actual resistance, and comparing the difference between the two to check for malfunctions. Another existing technology collects and tracks the load-side voltage and total current signals, decomposing the total power load in real time into the sum of the power consumption information of each component appliance, thereby obtaining the operating status information of each appliance within the load.

[0004] However, existing technical solutions only detect the overall power of the refrigerator or only decompose the total electrical load, and cannot independently detect the real-time power of each load inside the refrigerator. Existing solutions lack a graded judgment mechanism for load power anomalies, and cannot perform differentiated power-off control according to the degree of power anomaly, making it difficult to achieve fine-grained power monitoring and proactive safety protection for each load of the refrigerator. Summary of the Invention

[0005] This application provides a refrigerator power detection safety control system and method to solve the technical problems of existing technologies that cannot independently detect the power of each load inside the refrigerator in real time, cannot output corresponding safety control commands to control the switching elements to perform power on / off operations when the load power is abnormal, and are difficult to achieve refined power monitoring and active safety protection.

[0006] To achieve the above objectives, in a first aspect, this application provides a refrigerator power detection and safety control system, comprising: The main control board has multiple load interfaces, which are used to connect different loads of the refrigerator. Multiple power detection units are provided, each set at a corresponding load interface. The power detection unit is configured to detect the power parameters of the connected load in real time. The power parameters include at least active power. Multiple switching elements are configured to control the on / off state of the power supply to the corresponding load or the entire refrigerator unit; The controller is communicatively connected to each power detection unit and each switching element. The controller is configured as follows: In response to the switching element of the refrigerator being turned on, the active power detected by each power detection unit is obtained; The active power is compared with a preset power threshold to generate a comparison result; Based on the comparison results, the corresponding safety control command is output. The safety control command is used to control the switching element to perform power supply switching operations.

[0007] Preferably, the comparison results include: a first comparison result and a second comparison result; The controller compares the active power with a preset power threshold and generates a comparison result, specifically configured as follows: If the active power is greater than the first power threshold and less than the second power threshold, a first comparison result is generated. If the active power is greater than or equal to the second power threshold, a second comparison result is generated; The second power threshold is greater than the first power threshold.

[0008] Preferably, the security control instructions include: a first security control instruction and a second security control instruction; The controller executes the corresponding safety control commands based on the comparison results, specifically configured as follows: Based on the first comparison result, a first safety control command is output. The first safety control command is used to control the switching element of the corresponding load to perform a power-off operation. Based on the second comparison result, a second safety control command is output. The second safety control command is used to control the switching elements of the refrigerator to perform a power-off operation.

[0009] Preferably, it further includes: a user interaction module, which is electrically connected to the controller; The controller executes a first safety control command based on the first comparison result, specifically configured as follows: The user interaction module sends a reminder message to the user terminal, which is used to remind the user that the corresponding load is operating at abnormal power. The user interaction module receives confirmation commands input from the user terminal. In response to the confirmation command, the first security control command is output.

[0010] Preferably, the controller executes a second safety control command based on the second comparison result, and is further configured to: The user interaction module sends an abnormal power outage notification to the user terminal. The abnormal power outage notification is used to remind the user that the refrigerator has lost power due to abnormal load power.

[0011] Preferably, it also includes a communication module, which is electrically connected to the controller; The controller is also configured as follows: Upload abnormal load information to the after-sales platform for after-sales personnel to view.

[0012] Preferably, the controller is further configured to: If the active power is less than the first power threshold, power consumption information is sent to the user terminal through the user interaction module. The power consumption information includes at least one of daily power consumption, weekly power consumption, or monthly power consumption.

[0013] Preferably, the power parameter further includes: apparent power; The controller is also configured as follows: Obtain the apparent power detected by each power detection unit; Apparent power is sent to the user terminal through the user interaction module.

[0014] Preferably, the power parameters further include: the effective value of the voltage, the effective value of the live wire current, and the effective value of the neutral wire current; The controller is also configured as follows: Obtain the effective values ​​of voltage, live wire current, and neutral wire current detected by each power detection unit; If the effective voltage value exceeds the preset voltage threshold, it is determined to be overvoltage; If the effective value of the live wire current exceeds the preset current threshold, it is determined to be an overcurrent. If the difference between the effective value of the live wire current and the effective value of the neutral wire current exceeds the preset leakage threshold, it is determined to be leakage.

[0015] Secondly, this application provides a refrigerator power detection safety control method, applied to the refrigerator power detection safety control system of the first aspect, comprising: In response to the switching element of the refrigerator being turned on, the active power detected by each power detection unit is obtained; The active power is compared with a preset power threshold to generate a comparison result; Based on the comparison results, the corresponding safety control command is output. The safety control command is used to control the switching element to perform power supply switching operations.

[0016] As can be seen from the above technical solutions, this application provides a refrigerator power detection and safety control system. The system connects different loads of the refrigerator to multiple load interfaces set on the main control board. The power detection unit set at each load interface detects the power parameters of the connected load in real time. The controller obtains the active power detected by each power detection unit and compares the active power with a preset power threshold to generate a comparison result. Based on the comparison result, the corresponding safety control command is output to control the switching element to perform power on / off operation. This realizes independent power monitoring and graded power-off control of each load, effectively improving the safety and reliability of refrigerator operation. Attached Figure Description

[0017] To more clearly illustrate the technical solution of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the refrigerator power detection and safety control system provided in an embodiment of this application; Figure 2 A flowchart of a refrigerator power detection and safety control method provided in an embodiment of this application. Detailed Implementation

[0019] The embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described below do not represent all embodiments consistent with this application. They are merely examples of systems and methods consistent with some aspects of this application.

[0020] It should be noted that the brief descriptions of terms in this application are only for the convenience of understanding the embodiments described below, and are not intended to limit the embodiments of this application. Unless otherwise stated, these terms should be understood in their ordinary and common meaning.

[0021] In the following description, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0022] The terms “comprising” and “having”, and any variations thereof, are intended to cover but not exclude inclusion, for example, a product or device that includes a range of components is not necessarily limited to all of the components that are clearly listed, but may include other components that are not clearly listed or that are inherent to such product or device.

[0023] In the field of refrigerator power detection and safety control technology, refrigerators integrate multiple load modules such as fans, heaters, and compressors. These loads work together to maintain the refrigerator's normal cooling and preservation functions. During long-term operation, faults such as fan bearing wear, heater insulation aging, and compressor stall can cause the actual power of the corresponding load to deviate from its nominal power value. If the actual power of a load far exceeds its nominal power value, it may lead to circuit overload, overheating, and consequently, insulation damage, short circuits, or even fires, posing a threat to household circuits and personal safety. Furthermore, users cannot monitor the real-time operating status of the loads inside the refrigerator. When abnormal power occurs, users cannot detect it promptly and take appropriate measures. The continued presence of abnormal conditions can accelerate load damage and even lead to more serious safety accidents. Existing refrigerator power detection solutions only detect the overall power of the refrigerator or only decompose the total power load. They cannot independently detect the real-time power of each load inside the refrigerator, lack a graded judgment mechanism for load power anomalies, cannot perform differentiated power-off control based on the degree of power anomaly, and cannot issue reminders to users or receive user operation commands when load anomalies occur. It is difficult to achieve refined power monitoring of each load of the refrigerator, proactive safety protection, and user interaction management.

[0024] To address the aforementioned technical problems, some embodiments of this application provide a refrigerator power detection and safety control system. See also... Figure 1 , Figure 1 This is a schematic diagram of the refrigerator power detection and safety control system provided in an embodiment of this application. Taking three load interfaces as an example, the main control board is equipped with multiple load interfaces. Each load interface is connected to a corresponding power detection unit, and each power detection unit is connected to a corresponding switching element, one of which is the refrigerator's overall switching element. The controller is electrically connected to each power detection unit, each switching element, the user interaction module, and the communication module.

[0025] The refrigerator power detection and safety control system includes: a main control board, multiple power detection units, multiple switching elements, and a controller.

[0026] The main control board has multiple load interfaces. These interfaces are used to connect different loads within the refrigerator. The main control board is the core circuit board of the refrigerator's electrical control system, integrating control circuits, drive circuits, and signal processing circuits. Each load interface is a physical connection port soldered onto the main control board, used for electrical connection to different loads within the refrigerator. These loads include electrically powered components such as fans, heaters, compressors, and lights. Each load connects to the main control board via an independent interface, enabling the main control board to independently control the power supply and monitor the status of each load.

[0027] Multiple power detection units are provided, each located at a corresponding load interface. Each power detection unit is configured to detect the power parameters of the connected load in real time, including at least active power.

[0028] Specifically, the power detection unit is a detection component used to collect electrical parameters of the load. The power detection unit is soldered onto a circuit board near the load interface and connected in series in the load's power supply circuit. During operation, the power detection unit continuously collects the voltage and current waveforms of the load, calculates the active power, and transmits the active power value to the controller in real time via a communication bus. There are various ways to implement the power detection unit; for example, it can use an energy metering chip or an analog sampling circuit composed of a current transformer and an operational amplifier. This embodiment does not limit the implementation.

[0029] Multiple switching elements are configured to control the on / off state of the power supply to the corresponding load or the entire refrigerator unit.

[0030] Specifically, the switching element is an actuator used to perform power supply switching. The switching element is soldered onto the main control board and connected in series in the power supply line of the load or the main power supply line of the refrigerator. The switching element responds to control commands output by the controller, performing corresponding on / off switching operations. When the switching element is on, the power supply circuit is connected, and the load or the entire refrigerator is energized; when the switching element is off, the power supply circuit is disconnected, and the load or the entire refrigerator is de-energized. There are various ways to implement the switching element, such as using an electromagnetic relay, a solid-state relay, or a metal-oxide-semiconductor field-effect transistor; this embodiment is not limited to these methods.

[0031] The controller communicates with each power detection unit and each switching element. The controller is the core processing unit used to receive data, perform logical judgments, and output control commands.

[0032] The controller is configured as follows: In response to the switching element of the refrigerator being turned on, the power parameters detected by each power detection unit are acquired; The active power is compared with a preset power threshold to generate a comparison result; Based on the comparison results, the corresponding safety control command is output. The safety control command is used to control the switching element to perform power supply switching operations.

[0033] Specifically, the controller responds to the activation of the refrigerator's switching element by acquiring the power parameters detected by each power detection unit. The refrigerator's switching element is one of multiple switching elements connected in series in the refrigerator's main power supply line, used to control the on / off state of power supply to the refrigerator. When the user plugs the refrigerator into a power outlet, the refrigerator's switching element is in the off state, and the refrigerator is not powered. When the user presses the refrigerator's power switch, the refrigerator's switching element activates, the refrigerator receives power, and the controller simultaneously receives power and begins operation. Each power detection unit continuously monitors the power parameters of its connected load in real time while the refrigerator is powered on and transmits the detected power parameters to the controller. The controller acquires the power parameters transmitted from each power detection unit; these power parameters include at least active power.

[0034] After acquiring the power parameters transmitted from each power detection unit, the controller extracts the active power from the power parameters and compares the active power with a preset power threshold in the memory to obtain a comparison result. The comparison result reflects the relationship between the active power and the power threshold. Based on the comparison result, the controller outputs the corresponding safety control command. The safety control command is transmitted to the drive circuit of the switching element through the controller's communication interface. The drive circuit controls the switching element to turn on or off according to the command content.

[0035] As can be seen from the above technical solution, this embodiment connects different loads of the refrigerator to multiple load interfaces on the main control board. A power detection unit at each load interface monitors the power parameters of the connected load in real time. The controller acquires the power parameters detected by each power detection unit and compares the active power with a preset power threshold to generate a comparison result. Based on the comparison result, it outputs corresponding safety control commands to control the switching elements to perform power on / off operations, thus achieving independent power monitoring and active power-off protection for each load. This embodiment solves the technical problems of existing technologies that cannot independently perform real-time power detection on each load inside the refrigerator and cannot output corresponding safety control commands to control the switching elements to perform power on / off operations when the load power is abnormal, achieving refined power monitoring and active safety protection for each load of the refrigerator.

[0036] In some embodiments, the comparison results in the refrigerator power detection safety control system provided in this application include: a first comparison result and a second comparison result; The controller compares the active power with a preset power threshold and generates a comparison result, specifically configured as follows: If the active power is greater than the first power threshold and less than the second power threshold, the first comparison result is generated.

[0037] If the active power is greater than or equal to the second power threshold, a second comparison result is generated.

[0038] The second power threshold is greater than the first power threshold.

[0039] Specifically, the controller extracts the active power value from the power parameters and compares this active power value with a first power threshold and a second power threshold, respectively. When the controller determines that the active power is greater than the first power threshold and less than the second power threshold, the controller generates a first comparison result. When the controller determines that the active power is greater than or equal to the second power threshold, the controller generates a second comparison result.

[0040] For example, the normal active power of a wind turbine load is 10W, the first power threshold is set to 12W, and the second power threshold is set to 18W. When the active power of the wind turbine rises to 15W due to bearing wear, the controller determines that 15W is greater than 12W but less than 18W, and generates the first comparison result. When the active power of the wind turbine further rises to 20W, the controller determines that 20W is greater than 18W, and generates the second comparison result.

[0041] As can be seen from the above technical solution, this embodiment sets a first power threshold and a second power threshold. The controller compares the active power with the first and second power thresholds. When the active power is greater than the first power threshold and less than the second power threshold, a first comparison result is generated. When the active power is greater than or equal to the second power threshold, a second comparison result is generated. This allows the controller to generate two different comparison results, providing a basis for subsequent output of differentiated safety control commands. This embodiment solves the problem that existing technologies cannot perform graded comparison of abnormal load power.

[0042] In some embodiments, the refrigerator power detection safety control system provided in this application includes a first safety control instruction and a second safety control instruction. The controller executes a comparison based on the comparison result and outputs the corresponding safety control instruction, specifically configured as follows: Based on the first comparison result, a first safety control command is output, which is used to control the switching element of the corresponding load to perform a power-off operation.

[0043] Based on the second comparison result, a second safety control command is output. The second safety control command is used to control the switching elements of the refrigerator to perform a power-off operation.

[0044] The first comparison result corresponds to a slightly abnormal load power condition, meaning the load's active power exceeds the normal operating range but has not yet reached a serious level. In this case, it is only necessary to disconnect the power supply to the corresponding load. The second comparison result corresponds to a seriously abnormal load power condition, meaning the load's active power has reached or exceeded the warning line requiring immediate power disconnection. In this case, it is necessary to disconnect the power supply to the entire refrigerator to ensure safety.

[0045] Specifically, after acquiring the comparison results, the controller outputs corresponding safety control commands based on the type of the comparison results. When the controller acquires the first comparison result, it outputs a first safety control command. This first safety control command is transmitted through the controller's communication interface to the drive circuit of the corresponding load's switching element. The drive circuit then controls the corresponding load's switching element to perform a power-off operation based on the first safety control command. When the controller acquires the second comparison result, it outputs a second safety control command. This second safety control command is transmitted through the controller's communication interface to the drive circuit of the refrigerator's overall switching element. The drive circuit then controls the refrigerator's overall switching element to perform a power-off operation based on the second safety control command.

[0046] For example, the normal active power of the fan load is 10W, the first power threshold is set to 12W, and the second power threshold is set to 18W. When the fan's active power rises to 15W due to bearing wear, the controller generates a first comparison result and outputs a first safety control command. The first safety control command is transmitted to the drive circuit of the switching element corresponding to the fan load, which opens, cutting off the fan's power supply circuit. When the fan's active power further rises to 20W, the controller generates a second comparison result and outputs a second safety control command. The second safety control command is transmitted to the drive circuit of the switching element of the entire refrigerator, which opens, cutting off the refrigerator's power supply circuit.

[0047] As can be seen from the above technical solution, this embodiment sets a first safety control command and a second safety control command. Based on the first comparison result, the controller outputs the first safety control command to control the switching elements of the corresponding load to perform a power-off operation. Based on the second comparison result, it outputs the second safety control command to control the switching elements of the entire refrigerator to perform a power-off operation. This allows the controller to output differentiated safety control commands according to different comparison results, achieving tiered power-off control. This embodiment solves the problem that existing technologies cannot perform differentiated power-off control based on the degree of power anomaly.

[0048] In some embodiments, see Figure 1 The refrigerator power detection and safety control system provided in this application also includes a user interaction module. The user interaction module is electrically connected to the controller.

[0049] The user interaction module is a communication component used for information exchange with the user terminal. Located on the refrigerator's main control board, it connects to the user's mobile application via wireless communication. The module can send information output by the controller to the user terminal and also receive instructions from the user terminal and transmit them back to the controller.

[0050] The controller executes a first safety control command based on the first comparison result. Specifically, it is configured to: send a reminder message to the user terminal via the user interaction module; receive a confirmation command input from the user terminal via the user interaction module; and output the first safety control command in response to the confirmation command. The reminder message is used to alert the user to abnormal power consumption of the corresponding load.

[0051] Specifically, after the controller generates a first comparison result based on the comparison between the active power and the preset power threshold, the controller generates a reminder message and transmits the reminder message to the user interaction module. The user interaction module sends the reminder message to the user's mobile application, informing the user that the operating power of the corresponding load is abnormal. After seeing the reminder message on the mobile application, the user can click the power-off button in the application interface. The mobile application generates a confirmation command in response to the user's operation and sends the confirmation command back to the user interaction module. After receiving the confirmation command, the user interaction module transmits it to the controller. In response to the received confirmation command, the controller outputs a first safety control command, which controls the switching element of the corresponding load to perform a power-off operation.

[0052] As can be seen from the above technical solution, this embodiment sets up a user interaction module to send a reminder message to the user terminal when a slight abnormality occurs in the load, and after receiving the confirmation instruction returned by the user terminal, outputs a first safety control instruction to control the corresponding load to cut off the power, thereby realizing the user's remote control of the load power supply status, enabling the user to decide whether to cut off the power according to the actual situation, and improving the interactivity of the system and the flexibility of user use.

[0053] In some embodiments, in the refrigerator power detection and safety control system provided in this application, the controller executes a second safety control command based on a second comparison result, and is further configured to send an abnormal power outage notification to the user terminal through a user interaction module. The abnormal power outage notification is used to remind the user that the refrigerator has lost power due to abnormal load power.

[0054] Specifically, after the controller generates a second comparison result based on the comparison between the active power and the preset power threshold, it generates an abnormal power outage notification and transmits it to the user interaction module. The user interaction module then sends the notification to the user's mobile application, informing them that the refrigerator has automatically shut down due to a severe load power anomaly. By viewing the notification on their mobile application, users can promptly understand the refrigerator's malfunction status and contact after-sales service.

[0055] As can be seen from the above technical solution, this embodiment sends an abnormal power failure notification to the user terminal through the user interaction module, so that the user can know the fault status as soon as the refrigerator automatically loses power due to a serious abnormality, which facilitates the user to take timely follow-up measures and improves the information transparency of the system and the user experience.

[0056] In some embodiments, see Figure 1 The refrigerator power detection and safety control system provided in this application also includes a communication module. The communication module is electrically connected to the controller. The controller is also configured to upload load anomaly information to the after-sales platform for after-sales personnel to view.

[0057] The communication module is a component used for data communication with a remote server. Located on the refrigerator's main control board, it connects to a cloud-based after-sales service platform via the home wireless network. The communication module can upload load anomaly information generated by the controller to the after-sales service platform.

[0058] Specifically, after the controller generates the second comparison result and outputs the second safety control command, it generates load anomaly information. This information includes the name of the abnormal load, its active power value, the time of occurrence of the anomaly, and a second power threshold. The controller transmits this information to the communication module, which then uploads it to the cloud-based after-sales platform via the home wireless network. After-sales personnel can log in to the cloud-based after-sales platform through the after-sales management system to view the uploaded load anomaly information, identify the load problem based on its details, and perform repairs.

[0059] As can be seen from the above technical solution, this embodiment, by setting up a communication module, uploads load anomaly information to the after-sales platform for after-sales personnel to view, enabling after-sales personnel to remotely obtain detailed data on refrigerator load faults, facilitating after-sales personnel to prepare repair plans and spare parts in advance, and improving the efficiency and pertinence of after-sales service.

[0060] In some embodiments, the refrigerator power detection and safety control system provided in this application is further configured to: if the active power is less than a first power threshold, send power consumption information to the user terminal through the user interaction module. The power consumption information includes at least one of daily power consumption, weekly power consumption, or monthly power consumption.

[0061] Specifically, when the controller determines that the active power is less than the first power threshold, it indicates that the load is operating normally. At this time, the controller collects power consumption data for each load. Based on the active power values ​​detected in real time by the power detection unit, the controller calculates the total power consumption of each load over a day, week, or month, generating power consumption information. The controller transmits this power consumption information to the user interaction module, which then sends it to the user's mobile application. The user can then view the power consumption of each load on the refrigerator through the mobile application, gaining an understanding of the refrigerator's power distribution and energy consumption status.

[0062] As can be seen from the above technical solution, this embodiment sends power consumption information to the user terminal through the controller when the load is running normally, so that the user can understand the power consumption of each load of the refrigerator in real time, which facilitates the user to perform energy consumption management and power consumption analysis, and improves the data service capability of the system.

[0063] In some embodiments, the refrigerator power detection safety control system provided in this application further includes apparent power as a power parameter. The controller is also configured to: acquire the apparent power detected by each power detection unit and send the apparent power to the user terminal via a user interaction module.

[0064] Specifically, the power detection unit detects both active power and apparent power of the load. Apparent power is the product of the RMS voltage and RMS current, reflecting the total power the load draws from the grid. The power detection unit transmits the detected apparent power values ​​to the controller. After acquiring the apparent power values ​​from each power detection unit, the controller transmits the apparent power values ​​to the user interaction module, which then sends the apparent power to the user's mobile application. The user can then view the apparent power of each load through the mobile application and, in conjunction with the active power, understand the load's power factor.

[0065] As can be seen from the above technical solution, this embodiment detects apparent power through a power detection unit and sends apparent power to the user terminal through a user interaction module, enabling the user to have a more comprehensive understanding of the electrical parameters of each load of the refrigerator, which facilitates the user to perform power consumption analysis and fault prediction.

[0066] In some embodiments, the refrigerator power detection and safety control system provided in this application further includes the effective value of voltage, the effective value of live wire current, and the effective value of neutral wire current as power parameters. The controller is also configured to: Obtain the RMS values ​​of voltage, live wire current, and neutral wire current detected by each power detection unit. If the effective voltage value exceeds the preset voltage threshold, it is determined to be overvoltage.

[0067] If the effective value of the live wire current exceeds the preset current threshold, it is determined to be an overcurrent.

[0068] If the difference between the effective value of the live wire current and the effective value of the neutral wire current exceeds the preset leakage threshold, it is determined to be leakage.

[0069] Specifically, the power detection unit detects active power as well as the effective values ​​of the voltage, live wire current, and neutral wire current of the load power supply line. The power detection unit transmits these electrical parameters to the controller. The controller's internal memory stores preset voltage thresholds, preset current thresholds, and preset leakage current thresholds.

[0070] After acquiring the effective voltage value, the controller compares it with a preset voltage threshold. If the effective voltage value is greater than the preset voltage threshold, the controller determines that the current load power supply line has an overvoltage condition. After acquiring the effective value of the live wire current, the controller compares it with a preset current threshold. If the effective value of the live wire current is greater than the preset current threshold, the controller determines that the current load power supply line has an overcurrent condition. After acquiring the effective values ​​of the live wire current and the neutral wire current, the controller calculates the difference between the two effective values ​​and compares this difference with a preset leakage current threshold. If this difference is greater than the preset leakage current threshold, the controller determines that the current load power supply line has a leakage current condition.

[0071] For example, the preset voltage threshold is set to 250V, the preset current threshold is set to 5A, and the preset leakage threshold is set to 10mA. When the controller receives an effective voltage value of 260V, it is determined to be overvoltage. When the controller receives an effective live wire current value of 6A, it is determined to be overcurrent. When the controller receives an effective live wire current value of 2A and an effective neutral wire current value of 1.98A, the difference is 20mA, which is greater than the preset leakage threshold of 10mA, and it is determined to be leakage.

[0072] As can be seen from the above technical solution, this embodiment detects the effective value of voltage, effective value of live wire current, and effective value of neutral wire current through a power detection unit. The controller compares the effective value of voltage with a preset voltage threshold to determine overvoltage, compares the effective value of live wire current with a preset current threshold to determine overcurrent, and compares the difference between the effective value of live wire current and the effective value of neutral wire current with a preset leakage threshold to determine leakage. This realizes the detection of overvoltage, overcurrent, and leakage of the load power supply line, further improving the safety protection capability of the refrigerator.

[0073] In some embodiments, see Figure 2 This application also provides a refrigerator power detection safety control method, applied to the refrigerator power detection safety control system provided in the above embodiments. The method includes: S100: In response to the switching element of the refrigerator being turned on, acquire the active power detected by each power detection unit; S200: Compare the active power with the preset power threshold and generate a comparison result; S300: Based on the comparison results, output the corresponding safety control command. The safety control command is used to control the switching element to perform power supply switching operations.

[0074] For details, please refer to the description in the above-mentioned refrigerator power detection and safety control system embodiment, which will not be repeated here.

[0075] The above specific embodiments further illustrate the purpose, technical solution and beneficial effects of this application. It should be understood that the above are only specific embodiments of this application and are not intended to limit the scope of protection of this application. Any modifications, equivalent substitutions, improvements, etc., made on the basis of the technical solution of this application should be included within the scope of protection of this application.

Claims

1. A refrigerator power detection and safety control system, characterized in that, include: The main control board is provided with multiple load interfaces, which are used to connect to different loads of the refrigerator respectively. Multiple power detection units are provided, each power detection unit is located at the corresponding load interface, and the power detection unit is configured to detect the power parameters of the connected load in real time, the power parameters including at least: active power; Multiple switching elements, wherein the switching elements are configured to control the on / off switching of power supply to a corresponding load or the entire refrigerator; A controller, which is communicatively connected to each of the power detection units and each of the switching elements; The controller is configured to: In response to the switching element of the refrigerator being turned on, the active power detected by each of the power detection units is acquired; The active power is compared with a preset power threshold to generate a comparison result; Based on the comparison results, a corresponding safety control command is output, which is used to control the switching element to perform power supply switching operations.

2. The refrigerator power detection and safety control system according to claim 1, characterized in that, The comparison results include: a first comparison result and a second comparison result; The controller performs a comparison between the active power and a preset power threshold to generate a comparison result, specifically configured as follows: If the active power is greater than the first power threshold and less than the second power threshold, the first comparison result is generated; If the active power is greater than or equal to the second power threshold, the second comparison result is generated; Wherein, the second power threshold is greater than the first power threshold.

3. The refrigerator power detection and safety control system according to claim 2, characterized in that, The security control instructions include: a first security control instruction and a second security control instruction; The controller executes a corresponding safety control command based on the comparison result, specifically configured as follows: Based on the first comparison result, a first safety control command is output, which is used to control the switching element of the corresponding load to perform a power-off operation. Based on the second comparison result, a second safety control command is output, which is used to control the switching elements of the refrigerator to perform a power-off operation.

4. The refrigerator power detection and safety control system according to claim 3, characterized in that, Also includes: A user interaction module, which is electrically connected to the controller; The controller executes a first security control command based on the first comparison result, specifically configured as follows: The user interaction module sends a reminder message to the user terminal, which is used to remind the user that the corresponding load is operating at abnormal power. The user interaction module receives confirmation commands input from the user terminal. In response to the confirmation command, the first security control command is output.

5. The refrigerator power detection and safety control system according to claim 4, characterized in that, The controller executes a second safety control command based on the second comparison result, and is further configured to: The user interaction module sends an abnormal power outage notification to the user terminal, which is used to remind the user that the refrigerator has lost power due to abnormal load power.

6. The refrigerator power detection and safety control system according to claim 5, characterized in that, It also includes a communication module, which is electrically connected to the controller; The controller is also configured to: Upload abnormal load information to the after-sales platform for after-sales personnel to view.

7. The refrigerator power detection and safety control system according to claim 4, characterized in that, The controller is also configured to: If the active power is less than the first power threshold, power consumption information is sent to the user terminal through the user interaction module. The power consumption information includes at least one of daily power consumption, weekly power consumption, or monthly power consumption.

8. The refrigerator power detection and safety control system according to claim 4, characterized in that, The power parameters also include: apparent power; The controller is also configured to: Obtain the apparent power detected by each of the power detection units; The apparent power is sent to the user terminal through the user interaction module.

9. The refrigerator power detection and safety control system according to claim 1, characterized in that, The power parameters also include: effective voltage value, effective live wire current value, and effective neutral wire current value; The controller is also configured to: Obtain the effective values ​​of voltage, live wire current, and neutral wire current detected by each of the power detection units; If the effective value of the voltage exceeds the preset voltage threshold, it is determined to be overvoltage; If the effective value of the live wire current exceeds the preset current threshold, it is determined to be an overcurrent. If the difference between the effective value of the live wire current and the effective value of the neutral wire current exceeds the preset leakage threshold, it is determined to be leakage.

10. A refrigerator power detection safety control method, applied to the refrigerator power detection safety control system according to any one of claims 1-9, characterized in that, include: In response to the switching element of the refrigerator being turned on, the active power detected by each power detection unit is obtained; The active power is compared with a preset power threshold to generate a comparison result; Based on the comparison results, a corresponding safety control command is output, which is used to control the switching element to perform power supply switching operations.

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