A refrigerator night active noise reduction control method

Abstract

The control method of the refrigerator night active noise reduction comprises the following steps: the refrigerator is powered on, when the refrigerator is connected to the network through WiFi, the refrigerator computer board acquires an accurate time point Ctime through the network clock; when the refrigerator cannot acquire the accurate clock because it is not connected to the network, further judgment is performed; whether the condition of entering the "night quiet" mode is met is judged, if yes, the "night quiet" mode is entered; the "night quiet" mode is exited; after the refrigerator exits the "night quiet" mode, the refrigerator is operated according to the setting mode before entering, and is forced to operate until the refrigerator reaches the set temperature, and then stops; in order to ensure the continuous refrigeration of the refrigerator, after the "night quiet" operation for Tnight hours, the refrigerator needs to be forced to operate refrigeration after exiting, and when the cumulative compressor operation time reaches Ths hours, the refrigerator is forced to defrost once; after the refrigerator exits the "night quiet" mode, the refrigerator is operated according to the normal mode setting, and is forced to operate in the normal mode for 12H, and then whether the "night quiet" mode needs to be entered is judged again according to the condition.

Description

Technical Field

[0001] This invention relates to a control method for active noise reduction in refrigerators at night, which belongs to the field of household appliance technology. Background Technology

[0002] Currently, household refrigerators or ice bars on the market do not have active noise reduction functions. They can only rely on limited structural design to reduce noise, and therefore cannot solve the compressor and fan noise caused by the frequent start-stop of the refrigerator at night.

[0003] Therefore, it is indeed necessary to improve existing technologies to address their shortcomings. Summary of the Invention

[0004] This invention provides a method for actively reducing noise in refrigerators at night to address the problems existing in the prior art. It uses an ambient light sensor to detect the illuminance near the refrigerator, combined with the refrigerator's own ambient temperature sensor, to determine that the refrigerator is in a nighttime environment. Upon this determination, the method actively reduces the compressor speed to operate at the lowest noise level and controls the freezer fan to run at its lowest speed, thus achieving noise reduction. During the day, the refrigerator automatically resumes normal operation.

[0005] The technical solution adopted in this invention is: a control method for active noise reduction of a refrigerator at night, comprising the following steps:

[0006] Step 1: Power on the refrigerator. When the refrigerator connects to the internet via WiFi, the refrigerator's computer board obtains the accurate time point Ctime through the network clock and performs clock calibration as an auxiliary method for determining day and night.

[0007] Step Two: When the refrigerator is not connected to the network and cannot obtain an accurate clock, perform the following checks:

[0008] 2.1 Users can select to enter the "Night Silent" mode by pressing a button;

[0009] 2.2. The ambient light sensor determines that the ambient light illuminance remains below the set value LXmin for a period of time Tmin.

[0010] 2.3. During the tdoor time period, there is no door opening / closing action and no temperature setting adjustment change;

[0011] 2.4 Determine if the ambient temperature is less than or equal to Tem℃;

[0012] 2.5. Determine that the temperature difference between the chamber and the set temperature fluctuates stably within ±△℃ for a continuous time t.

[0013] Step 3: Determine whether the entry conditions listed in Step 2 are met. If all the conditions listed in Step 2 are met, the refrigerator will enter the "Nighttime Silent" mode. If not, continue to prepare and determine the entry conditions.

[0014] Step 4: Enter "Nighttime Silent Mode";

[0015] Step 5: Exiting the "Nighttime Silent" mode;

[0016] Step Six: After the refrigerator exits the "Nighttime Silent" mode, run it according to the settings mode before entering the mode, and force it to run until the refrigerator reaches the set temperature before stopping.

[0017] Step 7: To ensure continuous cooling of the refrigerator, run the "nighttime silent" mode for Tnight hours each time, and then force the cooling mode to run again after exiting. When the cumulative compressor running time reaches Ths hours, force defrost once.

[0018] Step 8: After the refrigerator exits the "Nighttime Silent" mode, it will run according to the normal mode settings and be forced to run in normal mode for 12 hours. Then, it will judge the conditions again to determine whether it needs to enter the "Nighttime Silent" mode.

[0019] Furthermore, step four is detailed below:

[0020] 4.1 The "Nighttime Silent" mode runs for Tnight hours;

[0021] 4.2 During this period, the refrigeration fan runs continuously at the lowest speed Rmin without stopping, and the compressor runs continuously at the lowest speed Ramin without stopping;

[0022] 4.3 The freezer compartment maintains freezing and cooling, while the refrigerator compartment operates at the normal set temperature;

[0023] 4.4. During the "quiet night" period, it does not defrost and continues to cool;

[0024] 4.5. If the refrigerator detects that the freezing sensor temperature is greater than Tfrmax℃ for a continuous time t, it determines that the current temperature does not meet the requirements for normal use. The compressor speed will be increased by ΔR rpm starting from Ramin. The freezing sensor temperature will be checked in real time, and the speed will be increased by ΔR rpm every Δt time. The maximum speed is Ramin rpm and then it will not be increased. After the freezing compartment temperature reaches Tfrmax℃ and stabilizes for a continuous time t, the compressor will run at this speed.

[0025] Furthermore, step five is detailed below:

[0026] 5.1 When the "Night Silent" mode runs continuously for Tnight hours;

[0027] 5.2 The ambient light sensor detects that the ambient illuminance exceeds the set value LXmin and remains so for a period of Tmin;

[0028] 5.3. The compressor runs continuously at Rmax rpm for X hours, and the refrigeration sensor temperature still must not be lower than Tfrmax ℃;

[0029] 5.4 Users can manually adjust the refrigerator's operating mode or set the temperature.

[0030] 5.5 Ambient temperature greater than Tem℃;

[0031] 5.6. Users can manually disable the "Nighttime Silent" function.

[0032] The "Nighttime Silent Mode" will be exited when any of the above conditions are met.

[0033] Furthermore, in step one, Ctime is the user-defined time to start entering silent mode at night. After the refrigerator is connected to the WiFi network, this setting can be customized and modified in the mobile app.

[0034] This invention offers the following advantages: The refrigerator's active noise reduction control method for nighttime operation, by adding ambient light and temperature sensors, enables the refrigerator to sense its surroundings. The refrigerator's computer board simulates normal daytime operation and quiet sleep mode at night. This active noise reduction is achieved while maintaining cooling in both the freezer and refrigerator compartments, significantly improving the user experience. It also reduces the abrupt noise from frequent compressor / fan starts and stops at night, lowering the probability of users perceiving noise. Attached Figure Description

[0035] Figure 1 This is a flowchart of the active noise reduction control method for refrigerators at night according to the present invention. Detailed Implementation

[0036] The invention will now be further described with reference to the accompanying drawings.

[0037] The present invention provides a method for controlling active noise reduction in a refrigerator at night, comprising the following steps:

[0038] Step 1: Power on the refrigerator. When the refrigerator connects to the network via WiFi, the refrigerator's computer board obtains the accurate time point Ctime through the network clock and performs clock calibration as an auxiliary judgment for day and night. Ctime is the user-defined time point to start entering the night silent mode. After the refrigerator connects to the WiFi network, the settings can be customized and modified in the mobile APP.

[0039] Step Two: When the refrigerator is not connected to the network and cannot obtain an accurate clock, perform the following checks:

[0040] 2.1 Users can select to enter the "Night Silent" mode by pressing a button;

[0041] 2.2. The ambient light sensor determines that the ambient light illuminance remains below the set value LXmin for a period of time Tmin.

[0042] 2.3. During the tdoor time period, there is no door opening / closing action and no temperature setting adjustment change;

[0043] 2.4 Determine if the ambient temperature is less than or equal to Tem℃;

[0044] 2.5. Determine that the temperature difference between the chamber and the set temperature fluctuates stably within ±△℃ for a continuous time t.

[0045] Step 3: Determine whether the entry conditions listed in Step 2 are met. If all the conditions listed in Step 2 are met, the refrigerator will enter the "Nighttime Silent" mode. If not, continue to prepare and determine the entry conditions.

[0046] Step 4: When entering "Night Silent Mode",

[0047] 4.1 The "Nighttime Silent" mode runs for Tnight hours;

[0048] 4.2 During this period, the refrigeration fan runs continuously at the lowest speed Rmin without stopping, and the compressor runs continuously at the lowest speed Ramin without stopping;

[0049] 4.3 The freezer compartment maintains freezing and cooling, while the refrigerator compartment operates at the normal set temperature;

[0050] 4.4. During the "quiet night" period, it does not defrost and continues to cool;

[0051] 4.5. If the refrigerator detects that the freezer sensor temperature is higher than Tfrmax℃ for a continuous time t, it determines that the current temperature does not meet normal operating requirements. The compressor speed will be increased by ΔR rpm from Ramin, with the freezer sensor temperature being checked every Δt. If the temperature exceeds Tfrmax℃, the speed will be increased by ΔR rpm, with a maximum speed of Ramin rpm, after which it will not increase further. Once the freezer temperature reaches Tfrmax℃ and stabilizes for a continuous time t, the compressor will operate at this speed.

[0052] Step 5: Exiting the "Nighttime Silent" mode

[0053] 5.1 When the "Night Silent" mode runs continuously for Tnight hours;

[0054] 5.2 The ambient light sensor detects that the ambient illuminance exceeds the set value LXmin and remains so for a period of Tmin;

[0055] 5.3. The compressor runs continuously at Rmax rpm for X hours, and the refrigeration sensor temperature still must not be lower than Tfrmax ℃;

[0056] 5.4 Users can manually adjust the refrigerator's operating mode or set the temperature.

[0057] 5.5 Ambient temperature greater than Tem℃;

[0058] 5.6. Users can manually disable the "Nighttime Silent" function.

[0059] The "Nighttime Silent Mode" will be exited when any of the above conditions are met.

[0060] Step Six: After the refrigerator exits the "Nighttime Silent" mode, run it according to the settings mode before entering the mode, and force it to run until the refrigerator reaches the set temperature before stopping.

[0061] Step 7: To ensure continuous cooling of the refrigerator, run the "nighttime silent" mode for Tnight hours each time, and then force the cooling mode to run again after exiting. When the cumulative compressor running time reaches Ths hours, force defrost once.

[0062] Step 8: After the refrigerator exits the "Nighttime Silent" mode, it will run according to the normal mode settings and be forced to run in normal mode for 12 hours. Then, it will judge the conditions again to determine whether it needs to enter the "Nighttime Silent" mode.

[0063] This invention relates to a method for active noise reduction in refrigerators at night. By adding ambient light and temperature sensors, the refrigerator gains the ability to sense its surroundings. The refrigerator's computer board simulates normal daytime operation and quiet sleep mode at night. This active noise reduction is achieved while maintaining cooling in both the freezer and refrigerator compartments, significantly improving the user experience. It also reduces the abrupt noise from frequent compressor / fan starts and stops at night, lowering the probability of perceived noise for the user.

[0064] The above description is only a preferred embodiment of the present invention. It should be noted that those skilled in the art can make several improvements without departing from the principle of the present invention, and these improvements should also be considered within the scope of protection of the present invention.

Claims

1. A method for controlling active noise reduction in a refrigerator at night, characterized in that: Includes the following steps: Step 1: Power on the refrigerator. When the refrigerator connects to the internet via WiFi, the refrigerator's computer board obtains the accurate time point Ctime through the network clock and performs clock calibration as an auxiliary method for determining day and night. Step Two: When the refrigerator is not connected to the network and cannot obtain an accurate clock, perform the following checks: 2.1 Users can select to enter the "Night Silent" mode by pressing a button; 2.

2. The ambient light sensor determines that the ambient light illuminance remains below the set value LXmin for a period of time Tmin. 2.

3. During the tdoor time period, there is no door opening / closing action and no temperature setting adjustment change; 2.4 Determine if the ambient temperature is less than or equal to Tem℃; 2.

5. Determine that the temperature difference between the chamber and the set temperature fluctuates stably within ±△℃ for a continuous time t. Step 3: Determine whether the entry conditions listed in Step 2 are met. If all the conditions listed in Step 2 are met, the refrigerator enters the "Nighttime Silent" mode. If not, continue to prepare and determine the entry conditions. Step 4: Enter "Nighttime Silent Mode"; Step 5: Exiting the "Night Silent" mode; Step Six: After the refrigerator exits the "Nighttime Silent" mode, run it according to the settings mode before entering the mode, and force it to run until the refrigerator reaches the set temperature before stopping. Step 7: To ensure continuous cooling of the refrigerator, run the "nighttime silent" mode for Tnight hours each time, and then force the cooling mode to run again after exiting. When the cumulative compressor running time reaches Ths hours, force defrost once. Step 8: After the refrigerator exits the "Nighttime Silent" mode, it will run according to the normal mode settings and be forced to run in normal mode for 12 hours. Then, it will judge the conditions again to determine whether it is necessary to enter the "Nighttime Silent" mode. In step one, Ctime is the user-defined time to start entering silent mode at night. After the refrigerator is connected to the WiFi network, the setting can be customized and modified in the mobile APP.

2. The control method for active noise reduction of a refrigerator at night as described in claim 1, characterized in that: Step four is as follows: 4.1 The "Nighttime Silent" mode runs for Tnight hours; 4.2 During this period, the refrigeration fan runs continuously at the lowest speed Rmin without stopping, and the compressor runs continuously at the lowest speed Ramin without stopping; 4.3 The freezer compartment maintains freezing and cooling, while the refrigerator compartment operates at the normal set temperature; 4.

4. During the "quiet night" period, it does not defrost and continues to cool; 4.

5. If the refrigerator detects that the freezing sensor temperature is greater than Tfrmax℃ for a continuous time t, it determines that the current temperature does not meet the requirements for normal use. The compressor speed will be increased by ΔR rpm starting from Ramin. The freezing sensor temperature will be checked in real time, and the speed will be increased by ΔR rpm every Δt time. The maximum speed is Ramin rpm and then no longer increases. After the freezing compartment temperature reaches Tfrmax℃ and stabilizes for a continuous time t, the compressor will run at this speed.

3. The control method for active noise reduction of a refrigerator at night as described in claim 2, characterized in that: Step five is as follows: 5.1 When the "Night Silent" mode runs continuously for Tnight hours; 5.2 The ambient light sensor detects that the ambient illuminance exceeds the set value LXmin and remains so for a period of Tmin; 5.

3. The compressor runs continuously at Rmax rpm for X hours, and the refrigeration sensor temperature still must not be lower than Tfrmax ℃; 5.4 Users can manually adjust the refrigerator's operating mode or set the temperature. 5.5 Ambient temperature greater than Tem℃; 5.

6. Users can manually disable the "Nighttime Silent" function. The "Nighttime Silent Mode" will be exited if any of the above conditions are met.

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