Self-cleaning system for cooling fan of refrigerator and control method of self-cleaning system

Abstract

The invention relates to a refrigerator cooling fan self-cleaning system and a control method thereof, and the system comprises a control unit which is configured with program logic for executing a self-cleaning method; the user interface is connected with the control unit and used for receiving an instruction input by a user and displaying the operation state of the control system; the numerical control DC motor is connected with the control unit and can rotate forwards and backwards; the fan blades are connected with the numerical control DC motor and used for rotating forwards and backwards under the driving of the numerical control DC motor so as to generate airflow for heat dissipation; the sensor assembly is connected with the control unit and used for providing the received signals for the control unit and transmitting the signals to the control unit, and the sensor assembly comprises a temperature sensor and a dust sensor. The invention further comprises the steps of the corresponding control method. According to the scheme, the numerical control DC motor drives the fan blades to rotate forwards and backwards, regular self-cleaning of the cooling fins of the refrigerator can be achieved while the cooling fins of the refrigerator are cooled, and the cooling efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of household appliances, and in particular to a self-cleaning system for a refrigerator cooling fan and a control method thereof. Background Art

[0002] As one of the indispensable household appliances in modern families, the main function of refrigerators is to keep food fresh and safe. The refrigeration effect of refrigerators depends on the efficient operation of the compressor, and the heat dissipation effect of the compressor directly affects its working efficiency and service life. Therefore, an efficient heat dissipation system is crucial to the overall performance of the refrigerator.

[0003] Traditional refrigerator cooling systems usually use shaded-pole motors to drive fans to dissipate heat from the compressor's heat sink. Although this traditional cooling system can basically meet daily use needs, it has many problems in actual applications, which seriously affect the performance of the refrigerator and user experience.

[0004] When the refrigerator is in a high temperature environment and dissipates heat all year round, a large amount of dust in the air will be blown by the cooling fan and attached to the heat sink of the compressor. Over time, this dust will gradually accumulate and form a thick dust layer. The accumulation of dust seriously hinders the heat dissipation effect of the heat sink, resulting in a significant decrease in heat dissipation efficiency. This not only increases the workload of the compressor, but may also cause local overheating and affect the normal operation of the compressor.

[0005] Therefore, how to overcome the above-mentioned defects has become an important issue to be solved urgently by those skilled in the art. Summary of the invention

[0006] The present invention overcomes the deficiencies of the above-mentioned technology and provides a control method for a refrigerator cooling fan self-cleaning system.

[0007] To achieve the above object, the present invention adopts the following technical solutions:

[0008] A self-cleaning system for a refrigerator cooling fan and a control method thereof, characterized by comprising:

[0009] a control unit configured with program logic for executing the self-cleaning method;

[0010] A user interface, connected to the control unit, for receiving instructions input by a user and displaying the operating status of the control system;

[0011] A digitally controlled DC motor connected to the control unit and capable of forward and reverse rotation;

[0012] a fan blade connected to the digitally controlled DC motor and configured to rotate forward and reversely under the drive of the digitally controlled DC motor, thereby generating airflow to dissipate heat;

[0013] The sensor assembly is connected to the control unit and is used to provide the received signal to the control unit and transmit the signal to the control unit. The sensor assembly includes a temperature sensor and a dust sensor.

[0014] The control method comprises the following steps:

[0015] Step S1, the user selects to start the self-cleaning mode through the user interface;

[0016] Step S2, the user interface sends a start signal to the control unit;

[0017] Step S3, after receiving the start signal, the control unit starts the forward rotation operation of the digital control DC motor, drives the fan blades to rotate forward to dissipate heat from the heat sink of the refrigerator compressor, and the forward rotation time ranges from 1.5 hours to 2.5 hours;

[0018] Step S4, after a preset time interval, the control unit sends a reverse rotation signal to the digitally controlled DC motor;

[0019] Step S5, after receiving the reverse rotation signal, the digitally controlled DC motor drives the fan blades to reversely rotate to remove dust accumulated on the heat sink of the refrigerator compressor, and the reverse rotation time ranges from 15 minutes to 25 minutes;

[0020] Step S6: After the digital controlled DC motor completes its reverse rotation, the control unit sends a recovery signal to the digital controlled DC motor;

[0021] Step S7: After receiving the recovery signal, the digitally controlled DC motor recovers the forward rotation state of the fan blades and continues to dissipate heat.

[0022] Further, the control unit includes: a signal processing module for processing signals from the user interface and the sensor assembly;

[0023] A logic control module, used to control the operation of the digital controlled DC motor according to a preset program logic;

[0024] The storage module is used to store the time intervals of forward and reverse rotation of the digital controlled DC motor and other system parameters.

[0025] Furthermore, the self-cleaning system further comprises: a display screen connected to the control unit and used to display the operating status and setting information of the control system;

[0026] An alarm device is connected to the control unit and is used to sound an alarm when a control system fails.

[0027] Furthermore, the control unit is also configured with a remote communication module for receiving remote instructions and sending system status information through a network.

[0028] Furthermore, the forward rotation time in step S3 is 2 hours.

[0029] Furthermore, the reversal time in step S5 is 20 minutes.

[0030] Furthermore, step S4 further includes:

[0031] Step a1, monitoring the temperature of the heat sink or the degree of dust accumulation through a sensor assembly;

[0032] Step a2: the sensor component sends the monitoring result to the control unit;

[0033] Step a3: The control unit determines whether to start the reversal operation of step S4 according to the monitoring result of step (b).

[0034] Furthermore, step S6 further includes:

[0035] Step b1, receiving a user input command through a user interface to adjust the time interval of forward rotation and / or reverse rotation;

[0036] Step b2: The user interface sends the user's input command to the control unit;

[0037] Step b3: The control unit updates the time interval for forward rotation and / or reverse rotation according to the user's input instruction.

[0038] Compared with the prior art, the present invention has the following beneficial effects:

[0039] In this case, the fan blades are driven by a digitally controlled DC motor to rotate forward and reverse. While dissipating heat from the refrigerator heat sink, the refrigerator heat sink can also be self-cleaned regularly to ensure that the heat sink is always in the best working condition and improve the heat dissipation efficiency. At the same time, by cleaning the dust on the refrigerator heat sink, the high-load operation time of the refrigerator compressor is reduced, energy consumption is significantly reduced, and the user's electricity bill is saved. The burden on the compressor is reduced, its service life is extended, and the cost of maintenance and replacement is reduced. Secondly, the working conditions of the heat sink are monitored in real time through the sensor component. Through the control method of the refrigerator cooling fan self-cleaning system, the time for the digitally controlled DC motor to drive the fan blades to rotate forward and reverse is set, effectively realizing intelligent control, improving the reliability and stability of the system, and effectively ensuring the heat dissipation effect and self-cleaning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a schematic diagram of the self-cleaning system used for the refrigerator cooling fan in this case.

[0041] Figure 2 This is a flow chart of the control method of the self-cleaning system of the refrigerator cooling fan in this case. DETAILED DESCRIPTION

[0042] The features of the present invention and other related features are further described in detail below through embodiments to facilitate understanding by those skilled in the art:

[0043] like Figure 1 to Figure 2 As shown, the present invention provides a self-cleaning system for refrigerator cooling fan and a control method thereof, including a control unit 1, which is configured with a program logic for executing the self-cleaning method. The control unit 1 is the central processor of the entire system, responsible for receiving user instructions, processing sensor data, and controlling the operation of the system. It also includes a user interface 2, which is connected to the control unit 1 and is used to receive instructions input by the user and display the operating status of the control system. The user interface provides an interactive interface between the user and the system, so that the user can easily start and adjust the self-cleaning mode, and the user can monitor and control the operating status of the system in real time. The numerical control DC motor 3 is connected to the control unit 1, and can rotate forward and reverse under the instruction of the control unit 1. In specific implementation, the control unit accurately controls the direction and speed of the motor to ensure the optimization of self-cleaning and heat dissipation effects. The fan blade 4 of this case is connected to the numerical control DC motor 3, and is used to rotate forward and reverse under the drive of the numerical control DC motor 3, thereby generating airflow to dissipate heat. The fan blade 4 generates airflow to dissipate heat to the heat sink by forward rotation, and removes dust on the heat sink by reverse rotation. The forward and reverse rotation of the fan blade 4 improves the heat dissipation efficiency, realizes the self-cleaning function, and prolongs the service life of the heat sink. In specific implementation, the design of the fan blades 4 can be optimized to reduce operating noise and improve airflow efficiency, and the speed or current of the digital control DC motor 3 can be adjusted to optimize the cleaning effect during the reversal operation. The sensor assembly 5 of the present invention is connected to the control unit 1, and is used to provide the received signal to the control unit 1 and transmit the signal to the control unit, specifically providing the working condition information of the refrigerator heat sink. The sensor assembly 5 includes a temperature sensor 51 and a dust sensor 52. Specifically, the temperature sensor 51 monitors the temperature of the heat sink in real time, and the dust sensor 52 monitors the dust accumulation of the heat sink in real time, thereby transmitting the corresponding signal to the control unit 1, providing a decision-making basis for the control unit 1. The setting of the sensor assembly 5 improves the intelligence level of the system and ensures the timeliness and effectiveness of the self-cleaning operation.

[0044] The following are the specific steps of the control method for the refrigerator cooling fan self-cleaning system of the present invention:

[0045] Step S1, the user selects to start the self-cleaning mode through the user interface 2;

[0046] Step S2, the user interface 2 sends a start signal to the control unit 1;

[0047] Step S3, after receiving the start signal, the control unit 1 starts the forward rotation operation of the digital control DC motor 3, drives the fan blades 4 to rotate forward to dissipate heat from the heat sink of the refrigerator compressor, and the forward rotation time ranges from 1.5 hours to 2.5 hours;

[0048] Step S4, after a preset time interval, the control unit 1 sends a reverse rotation signal to the digital controlled DC motor 3;

[0049] Step S5, after receiving the reverse rotation signal, the digitally controlled DC motor 3 drives the fan blade 4 to reversely rotate to remove dust accumulated on the heat sink of the refrigerator compressor, and the reverse rotation time ranges from 15 minutes to 25 minutes;

[0050] Step S6: After the numerically controlled DC motor 3 completes reverse rotation, the control unit 1 sends a recovery signal to the numerically controlled DC motor 3;

[0051] Step S7: After receiving the recovery signal, the digitally controlled DC motor 3 recovers the forward rotation state of the fan blades 4 to continue heat dissipation.

[0052] Through the above steps, efficient heat dissipation and self-cleaning functions are achieved through the intelligent control unit, user interface, CNC DC motor, fan blades, sensor components, display screen and alarm device. The system can automatically complete the forward and reverse operations under the guidance of user instructions and sensor data to ensure automatic cleaning of the heat sink and efficient heat dissipation.

[0053] Further, based on the above technical solution, the control unit 1 includes a signal processing module 11, which is used to process signals from the user interface 2 and the sensor assembly 5, ensure that user instructions and data from the sensor assembly 5 can be processed in a timely and accurate manner, improve the response speed and reliability of the system, ensure the integrity and accuracy of all input signals, and provide a reliable data basis for subsequent logic control. In specific implementation, the signal processing module 11 can be used for signal processing of the user interface 2, such as receiving instructions input by the user through the user interface 2, such as starting the self-cleaning mode, adjusting the time interval between forward and reverse rotation, etc.; the signal processing module 11 can also be used to receive data from the sensor assembly 5, including the heat sink temperature and dust accumulation degree information provided by the temperature sensor 51 and the dust sensor 52. The control unit 1 also includes a logic control module 12 and a storage module 13. Among them, the logic control module 12 is used to control the operation of the numerical control DC motor 3 according to the preset program logic, and realize the intelligent control of the system through the preset program logic, improve the automation level and reliability of the system, ensure that the numerical control DC motor 3 operates in the best state, improve the heat dissipation and self-cleaning effects, and dynamically adjust the operation according to the sensor data to adapt to different use environments and conditions. Specifically, the logic control module 12 includes programs such as start control, timing control, recovery control, and intelligent control. Start control is to start the forward operation of the numerical control DC motor 3 according to the user's instructions. Timing control is to send a reversal signal to the numerical control DC motor 3 after a preset time interval. Recovery control is to send a recovery signal to the numerical control DC motor 3 after the reversal operation is completed to restore it to the forward state. Intelligent control is to intelligently adjust the timing of forward and reverse operation according to the data provided by the sensor component 5 to ensure the best heat dissipation and self-cleaning effect. The storage module 13 of this case is used to store the time interval of the forward and reverse rotation of the numerical control DC motor 3 and other system parameters to ensure that the time interval and other parameters of each operation are consistent, improve the stability and reliability of the system, and facilitate troubleshooting and system maintenance through the stored historical data and parameter records. It has traceability, and users can adjust and save different parameter settings as needed to improve the flexibility and personalization of the system. In specific implementation, the storage module 13 includes time interval storage and system parameter storage. Among them, the time interval storage is used to store the time interval of forward and reverse rotation to ensure that the time setting of each operation is consistent. System parameter storage is used to store other system parameters, such as self-cleaning mode and fault records set by the user.

[0054] Preferably, the self-cleaning system of the present invention also includes: a display screen 6 and an alarm device 7. Among them, the display screen is connected to the control unit 1, and is used to display the operating status and setting information of the control system, providing intuitive visual feedback, so that the user can easily understand the operating status and setting information of the system. Such as real-time display of the current operating status, such as forward, reverse, standby, etc.; display of user-set parameters, such as the time interval between forward and reverse, self-cleaning mode and other setting information; display of system fault information to help users find and solve problems in time. The alarm device 7 of this case is connected to the control unit 1, and is used to sound an alarm when a fault occurs in the control system, monitor the operating status of the system in real time, detect various potential faults, and when a fault is detected, sound an alarm through sound, light, etc. to remind the user to pay attention, and record the time and type of the fault, which is convenient for subsequent fault analysis and maintenance.

[0055] Preferably, the control unit 1 is also equipped with a remote communication module 14 for receiving remote instructions and sending system status information through the network. The user can send instructions remotely through a mobile phone APP or the Internet to start or adjust the self-cleaning mode. The operating status and fault information of the system are sent in real time through the remote communication module 14, which is convenient for users and maintenance personnel to monitor remotely. Users can control and monitor the system through remote equipment anytime and anywhere, improving the convenience and intelligence level of the system. If a fault occurs, fault information can also be sent in time to help users take quick measures to avoid further expansion of the fault.

[0056] Preferably, the forward rotation time in step S3 is 2 hours. The forward rotation time of 2 hours ensures that the fan blades can continuously generate sufficient airflow to effectively dissipate heat from the heat sink of the refrigerator compressor. The forward rotation time of 2 hours can adapt to most usage environments and ensure that the heat sink maintains a good heat dissipation effect even under high temperature or high load conditions.

[0057] Preferably, the reversal time in step S5 is 20 minutes. The reversal time of 20 minutes ensures that the fan blades can generate sufficient reverse airflow to completely remove the dust accumulated on the heat sink. The reversal time of 20 minutes can effectively remove dust without causing excessive wear to the fan blades and the digital control DC motor.

[0058] Based on the above technical solution, further, step S4 also includes:

[0059] Step a1, monitoring the temperature of the heat sink or the degree of dust accumulation through the sensor assembly 5;

[0060] Step a2, the sensor component 5 sends the monitoring result to the control unit 1;

[0061] Step a3: The control unit 1 determines whether to start the reversal operation of step S4 according to the monitoring result of step (b).

[0062] Through the above steps, the working conditions of the heat sink are monitored in real time to obtain the current temperature and dust accumulation level, ensuring that the system can make corresponding forward or reverse operation decisions based on the actual working conditions, and cool or remove dust from the heat sink in a timely, effective and accurate manner.

[0063] Based on the above technical solution, further, step S6 also includes:

[0064] Step b1, receiving a user input command through the user interface 2 to adjust the time interval of forward rotation and / or reverse rotation;

[0065] Step b2: the user interface 2 sends the user's input command to the control unit 1;

[0066] Step b3: the control unit 1 updates the time interval for forward rotation and / or reverse rotation according to the user's input instruction.

[0067] Through the above steps, a friendly operation interface is provided for the user, so that the user can easily adjust the time interval between forward and reverse rotation, and input corresponding instructions, ensuring that the system can be adjusted according to the user's needs.

[0068] As mentioned above, this case protects a self-cleaning system for a refrigerator cooling fan and a control method thereof. All technical solutions that are the same or similar to this case should be shown to fall within the protection scope of this case.

Claims

1. A self-cleaning system for a refrigerator cooling fan and a control method thereof, characterized in that: include: A control unit (1) configured with program logic for executing a self-cleaning method; A user interface (2) connected to the control unit (1) and used to receive instructions input by a user and display the operating status of the control system; A digitally controlled DC motor (3) connected to the control unit (1) and capable of forward and reverse rotation; A fan blade (4) is connected to the digitally controlled DC motor (3) and is used to rotate forward and reverse under the drive of the digitally controlled DC motor (3), thereby generating airflow to dissipate heat; a sensor assembly (5) connected to the control unit (1) and used to provide the received signal to the control unit (1) and transmit the signal to the control unit (1), wherein the sensor assembly (5) comprises a temperature sensor (51) and a dust sensor (52). The control method comprises the following steps: Step S1, the user selects to start the self-cleaning mode through the user interface (2); Step S2: the user interface (2) sends a start signal to the control unit (1); Step S3, after receiving the start signal, the control unit (1) starts the forward rotation operation of the digital control DC motor (3), drives the fan blades (4) to rotate forward to dissipate heat from the heat sink of the refrigerator compressor, and the forward rotation time ranges from 1.5 hours to 2.5 hours; Step S4, after a preset time interval, the control unit (1) sends a reverse rotation signal to the digital controlled DC motor (3); Step S5, after receiving the reverse rotation signal, the digitally controlled DC motor (3) drives the fan blades (4) to reversely rotate to remove dust accumulated on the heat sink of the refrigerator compressor, and the reverse rotation time ranges from 15 minutes to 25 minutes; Step S6: After the numerically controlled DC motor (3) completes reverse rotation, the control unit (1) sends a recovery signal to the numerically controlled DC motor (3); Step S7: After receiving the recovery signal, the digitally controlled DC motor (3) recovers the forward rotation state of the fan blades (4) and continues to dissipate heat.

2. A self-cleaning system for refrigerator cooling fan and control method thereof according to claim 1, characterized in that: The control unit (1) comprises: a signal processing module (11) for processing signals from the user interface (2) and the sensor assembly (5); A logic control module (12), used for controlling the operation of the digital controlled DC motor (3) according to a preset program logic; The storage module (13) is used to store the time intervals between forward and reverse rotation of the digital controlled DC motor (3) and other system parameters.

3. According to the self-cleaning system and control method for refrigerator cooling fan as described in claim 2, it is characterized in that: The self-cleaning system further comprises: a display screen (6), connected to the control unit (1), and used for displaying the operating status and setting information of the control system; An alarm device (7) is connected to the control unit (1) and is used to issue an alarm when a fault occurs in the control system.

4. A self-cleaning system for refrigerator cooling fan and control method thereof according to claim 1, characterized in that: The control unit (1) is also provided with a remote communication module (14) for receiving remote instructions and sending system status information via a network.

5. A self-cleaning system for refrigerator cooling fan and control method thereof according to claim 1, characterized in that: The forward rotation time described in step S3 is 2 hours.

6. A self-cleaning system for refrigerator cooling fan and control method thereof according to claim 1, characterized in that: The reversal time described in step S5 is 20 minutes.

7. A refrigerator cooling fan self-cleaning system and control method thereof according to claim 1, characterized in that: Step S4 also includes: Step a1, monitoring the temperature of the heat sink or the degree of dust accumulation through the sensor assembly (5); Step a2: the sensor component (5) sends the monitoring result to the control unit (1); Step a3: The control unit (1) determines whether to start the reversal operation of step S4 according to the monitoring result of step (b).

8. A self-cleaning system for refrigerator cooling fan and control method thereof according to claim 1, characterized in that: Step S6 also includes: Step b1, receiving a user input command through the user interface (2) to adjust the time interval of forward rotation and / or reverse rotation; Step b2: the user interface (2) sends the user's input command to the control unit (1); Step b3: the control unit (1) updates the time interval of forward rotation and / or reverse rotation according to the user's input instruction.

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