Refrigerator

Abstract

The invention discloses a refrigerator which comprises a refrigerator body, an evaporator, a fan, a vibration detection unit and a controller. The box body comprises a cold source cavity, an air duct and a storage chamber; the air duct communicates with the cold source cavity and the storage chamber; the storage chamber comprises a freezing chamber; the air duct comprises a freezing air duct which communicates with the freezing chamber; the evaporator is arranged in the cold source cavity and used for conveying cold energy to the storage chamber through the air duct. The fan is arranged in the freezing air duct, is fixedly connected with the box body, and drives air carrying cooling capacity to enter the freezing chamber from the cold source cavity; the vibration detection unit is fixedly arranged in the freezing air duct and is used for detecting vibration of the box body and obtaining a vibration signal; the controller is electrically connected with the fan and the vibration monitoring unit and is configured to receive the vibration signal; judging whether low-temperature abnormal vibration of the fan occurs or not according to the vibration signal; if yes, the low-temperature shutdown temperature is increased. When low-temperature abnormal vibration of the fan occurs, the low-temperature shutdown temperature is increased, the low-temperature operation environment of the fan is improved, low-temperature noise is reduced, and the use experience of a user is improved.

Description

Technical Field

[0001] This invention relates to the field of refrigeration technology, and more specifically to a refrigerator. Background Technology

[0002] As people's demand for freezing temperatures continues to expand, the low-temperature levels of refrigerator freezer compartments are also constantly being updated; however, with the increase in the low-temperature level of freezer compartments, component defects and performance changes due to operation in low-temperature environments are also emerging.

[0003] For example, when the freezer temperature exceeds the specified low temperature, some fan components may be unsuitable for low-temperature conditions, resulting in abnormal noise and affecting the user experience.

[0004] The information disclosed in this background section is only intended to enhance the understanding of the background technology of this application, and therefore may include prior art that is not known to those skilled in the art. Summary of the Invention

[0005] In response to the abnormal noise problem caused by the low-temperature incompatibility of some fan components in low-temperature environments, as mentioned in the background art, this invention proposes a refrigerator that raises the low-temperature shutdown temperature when abnormal low-temperature vibration of the fan occurs, thereby improving the low-temperature environment of the fan, improving the low-temperature noise problem, and enhancing the user experience.

[0006] To achieve the above-mentioned objectives, the present invention employs the following technical solutions.

[0007] A refrigerator, comprising: The enclosure has an inner cavity; the inner cavity is divided into a cold source cavity, an air duct, and a storage compartment; the air duct connects the cold source cavity and the storage compartment; the storage compartment includes a freezer compartment; the air duct includes a freezer air duct, which connects to the freezer compartment; An evaporator, which is disposed in the cold source cavity, is used to deliver cold energy to the storage compartment through the air duct; A fan is installed in the refrigeration air duct and fixedly connected to the housing, driving the air carrying the cold energy from the cold source cavity into the refrigeration chamber; A vibration detection unit is fixedly installed in the refrigeration air duct to detect the vibration of the housing and obtain vibration signals; The controller, which is electrically connected to the fan and the vibration monitoring unit respectively, is configured as follows: Receive the vibration signal; Determine whether abnormal low-temperature vibration of the fan has occurred based on the vibration signal; if so, increase the low-temperature shutdown temperature.

[0008] The refrigerator of this invention determines whether abnormal low-temperature vibration of the fan has occurred based on the vibration signal measured by the vibration detection unit, and raises the low-temperature shutdown temperature when abnormal low-temperature vibration of the fan occurs. That is, when abnormal low-temperature vibration of the fan occurs, the compressor stops when the freezer temperature is lower than the low-temperature shutdown temperature, and stops producing cold energy. The low-temperature shutdown temperature is lower than the set temperature of the freezer. The low-temperature shutdown temperature is raised from the original low-temperature shutdown temperature but is still lower than the set temperature of the freezer. This achieves the goal of improving the low-temperature operating environment of the fan without affecting the freezer temperature, reducing the probability of low-temperature fan failure or low-temperature noise, and improving the user experience.

[0009] In some specific embodiments, a display module is also included, which is communicatively connected to the controller; The controller is configured to continue receiving the vibration signal and determine whether the abnormal low-temperature vibration of the fan still exists when the low-temperature shutdown temperature is increased after the abnormal low-temperature vibration of the fan occurs; if so, it sends a first fault alarm signal to the display module and controls the display module to display the first fault alarm.

[0010] In this embodiment, when raising the low-temperature shutdown temperature still fails to resolve the problem of abnormal low-temperature vibration of the fan, the control display module displays the first fault alarm, prompting the user and maintenance personnel to identify the cause and type of the fault, thus facilitating fault location and improving maintenance efficiency.

[0011] In some specific embodiments, determining whether the vibration signal indicates abnormal low-temperature vibration of the fan includes: Obtain the vibration value threshold; Acquire vibration signals during low-temperature mode; The vibration values ​​at the fundamental frequency and multiple harmonics at the fan speed are obtained based on the acquired vibration signal. Compare each vibration value with the vibration value threshold; if one or more of the vibration values ​​reach or exceed the vibration value threshold, then the vibration is abnormal; otherwise, there is no vibration abnormality. When the vibration is abnormal, the control changes the speed of the fan, and then the vibration signal and its fundamental frequency and multiple harmonics at the current fan speed are acquired. If one or more of the vibration values ​​reach or exceed the vibration value threshold, it is considered abnormal low-temperature vibration of the fan; otherwise, it is considered abnormal low-temperature vibration of the non-fan.

[0012] Based on the principle that the peak frequency of the vibration value changes with the fan speed when the fan vibration is abnormal, the refrigerator in this embodiment judges whether the fan low-temperature abnormal vibration has occurred by changing the vibration value of the fundamental frequency and multiple harmonic frequencies corresponding to the fan speed and whether one or more of them reach or exceed the vibration value threshold, thereby improving the accuracy of the judgment.

[0013] In some specific embodiments, the controller is configured with high speed and low speed; and is configured as follows: If the fan speed is changed and the abnormal vibration is determined to be abnormal vibration due to low temperature of the fan and the abnormal vibration disappears, and if the fan speed is changed from the low speed to the high speed, the fan is fixed to operate at the high speed. If the fan speed changes from the high speed to the low speed, a shutdown judgment time is set, and it is determined whether the fan stops within the shutdown judgment time. If yes, the fan is fixed at the low speed. If no, a second fault alarm signal is sent to the display module to display the second fault alarm.

[0014] In this embodiment, the refrigerator determines whether abnormal low-temperature vibration of the fan has occurred. When abnormal vibration is detected, the fan speed is adjusted. When the abnormal vibration disappears after adjusting the fan speed, it indicates that changing the speed can improve the vibration noise. If the fan speed changes from low to high, it will definitely meet the low-temperature maintenance requirement of the freezer compartment, so the fan is controlled to maintain high speed operation to improve the user experience. If the fan speed changes from high to low, it needs to be confirmed whether the low speed can meet the low-temperature maintenance requirement of the freezer compartment. If it can, the fan is controlled to maintain low speed operation to improve the user experience. If it cannot, the display module displays a second fault alarm, which not only improves the reliability of the freezer compartment's low temperature but also makes it easier for users and maintenance personnel to identify the cause of the fault, thus improving maintenance efficiency.

[0015] In some specific embodiments, a sampling duration is set; multiple vibration signals are acquired within the sampling duration in low-temperature mode; the average value of the vibration values ​​of each vibration signal at the fan's fundamental frequency and its multiple harmonics is calculated to determine whether it is an abnormal vibration or abnormal low-temperature vibration of the fan.

[0016] The refrigerator in this embodiment sets a sampling time and collects multiple vibration signals within the sampling time. It determines the vibration values ​​of the fundamental frequency and multiple harmonic frequencies by calculating the average value of the vibration values ​​of the fan speed fundamental frequency and multiple harmonic frequencies, thereby improving the accuracy and reliability of vibration values ​​and thus improving the accuracy and reliability of vibration anomalies and fan low temperature abnormal vibration judgment.

[0017] In some specific embodiments, a compressor is also included, which is electrically connected to the controller and controlled by the controller; the low temperature mode includes a defrost recovery mode, a user-terminated mode, and a rapid cooling / freezing mode; In the defrost recovery mode, the user termination mode, and the rapid cooling / freezing mode, the compressor operates under high load and the fan runs at high speed.

[0018] In this embodiment, the refrigerator is limited to detecting abnormal low-temperature vibration of the fan only in the low-temperature mode, which is prone to such vibration. This saves software and hardware resources, improves control efficiency, and reduces energy consumption.

[0019] In some specific embodiments, the controller is preset with a first cooling duration and configured as follows: After entering the low-temperature mode and running for the first cooling time, the vibration signal is acquired.

[0020] In this embodiment, the refrigerator acquires vibration signals after the first cooling time in low-temperature mode to ensure that a low-temperature environment is formed in the air duct that causes abnormal vibration of the fan at low temperature. This reduces unnecessary data acquisition, processing and judgment, saves software and hardware resources, improves control efficiency and reduces energy consumption.

[0021] In some specific embodiments, the controller has a preset correction coefficient and is configured as follows: The product of the maximum value of each vibration value during the first sampling period after entering the low-temperature mode and operating for the first cooling period, and the correction coefficient, is the vibration value threshold.

[0022] In this embodiment, the vibration threshold value of the refrigerator is obtained in real time based on its installation and operation, and is obtained in the early stage of low temperature mode cooling, which improves the rationality and accuracy of the vibration threshold value, thereby improving the accuracy of judging abnormal fan vibration and abnormal fan vibration at low temperature.

[0023] In some specific embodiments, the controller also presets a vibration value auxiliary threshold; and is configured as follows: When one or more of the vibration values ​​reach or exceed the vibration value threshold or the vibration value auxiliary threshold, it is determined that there is a vibration abnormality or a low-temperature vibration abnormality of the fan.

[0024] The refrigerator in this embodiment prevents abnormal vibration thresholds by setting a fixed vibration value auxiliary threshold, thereby achieving redundancy in the judgment standard of vibration value when judging abnormal vibration of the fan at low temperature, reducing judgment error, and improving the accuracy and reliability of judgment.

[0025] In some specific embodiments, an operation module is also included, which is electrically connected to the controller; the controller is also configured to have a maintenance mode and to execute the maintenance mode by operating the operation module; The maintenance modes include: Control the fan to operate independently at room temperature and acquire the vibration signal; determine whether the vibration is abnormal based on the vibration signal. A second cooling duration is set, and the fan is controlled to run at the high speed and the compressor is operated at high load. After the second cooling duration, the compressor is stopped. The vibration signal of the fan when it is running at the high speed is obtained; and the vibration signal is used to determine whether there is any vibration abnormality. The fan speed is switched to the low speed and the vibration signal is acquired; and the vibration signal is used to determine whether there is an abnormal vibration. When any one or more of the following conditions are determined to be abnormal vibration of the fan: operating at room temperature alone, operating at low temperature at high speed, or operating at low temperature at low speed, a third fault signal is sent to the display module to control it to display the third fault alarm.

[0026] In this embodiment, the refrigerator is configured with a maintenance mode. When abnormal low-temperature vibration of the fan occurs and cannot be improved by increasing the low-temperature shutdown temperature, the maintenance mode separates the fan's normal temperature, low-temperature high-speed, and low-temperature low-speed operation to confirm whether the abnormal vibration is caused by a fan malfunction or abnormal low-temperature vibration of the fan. This improves the efficiency of identifying the source of the fault and thus improves maintenance efficiency.

[0027] Other features and advantages of the present invention will become clearer after reading the detailed embodiments of the invention in conjunction with the accompanying drawings. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the structure of a refrigerator according to an embodiment; Figure 2 This is a schematic diagram of the structure of a refrigerator according to an embodiment; Figure 3 This is a schematic diagram of the connection of the refrigerator control components according to an embodiment; Figure 4 This is a schematic diagram of the control flow of a refrigerator according to an embodiment; Figure 5 This is a schematic diagram of the control flow of a refrigerator according to an embodiment; Figure 6 This is a schematic diagram of the control flow of a refrigerator according to an embodiment; Figure 7 This is a schematic diagram of the control flow of a refrigerator according to an embodiment; Figure 8 This is a schematic diagram of the control flow of a refrigerator according to an embodiment; Figure 9 This is a schematic diagram of the control flow of a refrigerator according to an embodiment; Figure 10 This is a schematic diagram of the control flow of a refrigerator according to an embodiment.

[0030] Figure label, 1. Cabinet; 11. Storage compartment; 12. Air duct; 13. Cold source cavity; 111. Freezer compartment; 112. Fresh food compartment; 121. Freezer air duct; 122. Fresh food air duct; 2. Fan; 3. Evaporator; 4. Vibration detection unit; 5. Compressor; 6. Controller; 7. Display module; 8. Operation module. Detailed Implementation

[0031] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0032] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0033] The terms "first" and "second" 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 as "first" or "second" 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.

[0034] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0035] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0036] The following disclosure provides many different embodiments or examples for implementing various structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0037] The refrigerator performs a refrigeration cycle using a compressor 5, a condenser, a throttling device, and an evaporator 3. The refrigeration cycle includes a series of processes involving compression, condensation, expansion, and evaporation to cool the interior space of the refrigerator.

[0038] Low-temperature, low-pressure refrigerant enters compressor 5, where it is compressed into a high-temperature, high-pressure refrigerant gas and discharged. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and heat is released through the condensation process.

[0039] The throttling device causes the high-temperature, high-pressure liquid refrigerant formed in the condenser to expand into a low-pressure liquid refrigerant. The evaporator 3 evaporates the refrigerant that has expanded in the throttling device and returns the low-temperature, low-pressure refrigerant gas to the compressor 5. The evaporator 3 can utilize the latent heat of refrigerant evaporation and blow the released latent heat into the refrigerator and freezer compartments 111 via the fan 2, thus achieving the low-temperature storage function of the freezer and refrigerator compartments 111.

[0040] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4The present invention discloses a refrigerator, which includes a cabinet 1; the cabinet 1 has an inner cavity, and the inner cavity is divided into a cold source cavity 13, an air duct 12, and a storage compartment 11; the air duct 12 connects the cold source cavity 13 and the storage compartment 11; the storage compartment 11 includes a freezer compartment 111; the air duct 12 includes a freezer air duct 121, which connects the cold source cavity 13 and the freezer compartment 111.

[0041] The refrigerator also includes an evaporator 3, which is located in the cold source cavity 13 to release cold energy and deliver the cold energy to the freezer compartment 111 through the freezer air duct 121.

[0042] The refrigerator also includes a fan 2, which is installed in the freezer air duct 121 and fixedly connected to the cabinet 1. This creates a pressure difference in the air duct 12, driving air carrying cold energy from the cold source cavity 13 into the freezer compartment 111, thereby cooling the freezer compartment 111.

[0043] The refrigerator also includes a vibration detection unit 4, which is fixedly installed in the freezer air duct 121 and connected to the cabinet 1. It is used to detect the vibration of the cabinet 1 and obtain vibration signals.

[0044] The refrigerator also includes a controller 6, which is electrically connected to the fan 2 and the vibration detection unit 4 respectively; the fan 2 is controlled by the controller 6 to operate; the vibration signal detected by the vibration detection unit 4 is transmitted to the controller 6. The controller 6 is configured to receive the vibration signal, and determine whether the fan 2 has experienced abnormal low-temperature vibration based on the received vibration signal, and raise the low-temperature shutdown temperature when abnormal low-temperature vibration of the fan 2 occurs.

[0045] That is, the refrigerator's control process includes: S1. Acquire vibration signals; S2. Based on the vibration signal, determine whether fan 2 experiences abnormal low-temperature vibration. If so, execute S3. S3. Increase the low-temperature shutdown temperature.

[0046] In other words, the refrigerator also includes a compressor 5, which is electrically connected to a controller 6 and is controlled by the controller 6 to operate; the refrigerator controls the compressor 5 to stop when the temperature of the freezer compartment 111 reaches the low temperature stop temperature; the low temperature stop temperature is lower than the set temperature of the freezer compartment 111; raising the low temperature stop temperature means that the refrigerator controls the compressor 5 to stop when the temperature of the freezer compartment 111 reaches a temperature higher than the low temperature stop temperature.

[0047] The refrigerator of the present invention determines whether abnormal low-temperature vibration of the fan 2 occurs based on the vibration signal measured by the vibration detection unit 4, and raises the low-temperature shutdown temperature when abnormal low-temperature vibration of the fan 2 occurs. That is, when abnormal low-temperature vibration of the fan 2 occurs, the compressor 5 stops when the temperature of the freezer compartment 111 is lower than the low-temperature shutdown temperature, and stops producing cold energy. The low-temperature shutdown temperature is lower than the set temperature of the freezer compartment 111. The low-temperature shutdown temperature is higher than the original low-temperature shutdown temperature but still lower than the set temperature of the freezer compartment 111. This achieves the goal of improving the low-temperature operating environment of the fan 2 without affecting the temperature of the freezer compartment 111, reducing the probability of low-temperature failure or low-temperature noise of the fan 2, and improving the user experience.

[0048] The specific structure, control process, and principle of the refrigerator of the present invention will be described in detail below through specific embodiments.

[0049] In some specific embodiments, refer to Figure 1 , Figure 2 , Figure 3 The storage compartment 11 also includes a fresh-keeping compartment 112; the air duct 12 also includes a fresh-keeping air duct 122, which connects the cold source cavity 13 and the fresh-keeping compartment 112, so that the cold energy in the cold source cavity 13 is transported to the fresh-keeping compartment 112 through the fresh-keeping air duct 122.

[0050] In some specific embodiments, refer to Figure 1 , Figure 2 , Figure 3 The vibration detection unit 4 is located in the middle of the refrigeration air duct 121, corresponding to and close to the fan 2. This improves the accuracy and reliability of the vibration signal, thereby improving the accuracy of determining whether abnormal low-temperature vibration of the fan 2 has occurred.

[0051] In some specific embodiments, refer to Figure 1 , Figure 2 , Figure 3 The vibration detection unit 4 is located in the middle of the horizontal direction of the housing 1 to improve the accuracy of vibration detection unit 4 in detecting vibration signals.

[0052] In some specific embodiments, refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 The refrigerator also includes a display module 7, which is communicatively connected to the controller 6.

[0053] The controller 6 is configured to control the operation to increase the low-temperature shutdown temperature when the fan 2 is found to be vibrating abnormally at low temperature. During the operation, the controller acquires the vibration signal and determines whether the abnormal low-temperature vibration of the fan 2 still exists based on the acquired vibration signal. In other words, the controller determines whether the abnormal low-temperature vibration of the fan 2 exists based on the acquired vibration signal.

[0054] If the abnormal vibration of the fan 2 at low temperature persists, a first fault alarm signal is sent to the display module 7, which then displays the first fault alarm.

[0055] That is, the refrigerator's control process also includes: S4. Obtain vibration signals when operating at increased low-temperature shutdown temperature; S5. Determine whether there is abnormal low-temperature vibration of fan 2 based on the acquired vibration signal, and if so, execute S6; S6. Send the first fault alarm signal to the display module 7; the display module 7 displays the first alarm fault.

[0056] In this embodiment, when raising the low-temperature shutdown temperature still fails to resolve the problem of abnormal vibration of the fan 2 at low temperatures, the control display module 7 displays a first fault alarm, prompting the user and maintenance personnel with the cause and type of the fault, facilitating fault location and improving maintenance efficiency.

[0057] In some specific embodiments, refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 Determining whether abnormal low-temperature vibration has occurred in fan 2 includes: S11. Determine if it is in low temperature mode; if so, proceed to S12. S12, Obtain the vibration value threshold; S13. Receive vibration signal; that is, the controller 6 obtains vibration signal from the vibration detection unit 4; S21. Obtain the vibration values ​​of the fundamental frequency and multiple harmonics of the fan speed in the vibration signal; S22. Determine whether one or more of the vibration values ​​have reached or exceeded the vibration value threshold; if yes, the vibration is abnormal, and proceed to S23; if no, return to S13 to receive the vibration signal. S23, Control fan 2 to change speed; S14, Receive vibration signal; that is, the controller 6 obtains vibration signal from the vibration detection unit 4; S24, Obtain the vibration value of the fundamental frequency and multiple harmonics of the fan 2 speed in the vibration signal; S25. Determine whether one or more of the vibration values ​​have reached or exceeded the vibration value threshold; if yes, determine that abnormal low-temperature vibration of fan 2 has occurred. S26. If no, determine that it is not abnormal low-temperature vibration of fan 2.

[0058] In acquiring vibration values ​​for the fundamental frequency and multiple harmonics of the fan 2 rotational speed, if the fan 2 rotational speed is r / min, then the fundamental frequency of the fan 2 rotational speed is r / 60Hz; the harmonics are 2r / 60 Hz, 3r / 60 Hz, 4r / 60 Hz, ...

[0059] To determine whether one or more vibration values ​​have reached or exceeded the vibration value threshold, the maximum and second-largest values ​​among the fundamental frequency and multiple harmonics can be locked and compared with the vibration value threshold.

[0060] Of course, the judgment of abnormal vibration and abnormal low-temperature vibration of fan 2 can be based on the maximum value of each vibration value reaching or exceeding the vibration value threshold; or the maximum and second largest values ​​of each vibration value must both reach or exceed the vibration value threshold before it can be judged as abnormal vibration or abnormal low-temperature vibration of fan 2; based on the multiple vibration values ​​that reach or exceed the vibration value threshold at the fundamental frequency or harmonic frequency of fan 2 and their migration, it can be confirmed that the abnormal vibration is caused by fan 2, thereby improving the accuracy of the judgment.

[0061] Based on the principle that the peak frequency of the vibration value of the fan 2 changes with the speed of the fan 2 when the fan 2 vibrates abnormally, the refrigerator in this embodiment judges whether the fan 2 has low-temperature abnormal vibration by changing the fundamental frequency and multiple harmonic vibration values ​​corresponding to the fan 2 speed and whether one or more of them reach or exceed the vibration value threshold, thereby improving the accuracy of the judgment.

[0062] In some specific embodiments, refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 The configuration of controller 6 also includes: When it is determined that abnormal vibration of low temperature occurs without fan 2, it includes vibration values ​​that reach or exceed the vibration value threshold without migration, and vibration values ​​that reach or exceed the vibration value threshold disappear.

[0063] If the vibration value reaches or exceeds the vibration threshold and there is no migration, it is determined that the vibration abnormality is not caused by fan 2, and the refrigerator is controlled to operate normally.

[0064] S251. When the vibration value that reaches or exceeds the vibration value threshold disappears, different controls are implemented according to the different trends of the fan speed change, and S252 is executed. S252. The refrigerator is configured with high speed and low speed via controller 6; when fan 2 changes from low speed to high speed, the abnormal vibration disappears and the cooling demand can be met; then S253 is executed. S253: Control fan 2 to maintain high-speed operation, reduce abnormal vibration, thereby reducing noise and improving user experience; When fan 2 changes from high speed to low speed, S254 is executed; S254. By setting the shutdown judgment time and whether the refrigerator will shut down within the shutdown judgment time, determine whether the low speed can meet the cooling demand for a long time; if the refrigerator shuts down within the shutdown judgment time, the low speed of the fan 2 can meet the cooling demand; execute S255; if the refrigerator does not shut down within the shutdown judgment time, the low speed of the fan 2 cannot meet the cooling demand; execute S256. S255 controls the fan 2 to run at a low speed to reduce abnormal vibration, thereby reducing noise and improving the user experience; S256. Send a fault signal to the display module 7 and control the display module 7 to display the second fault alarm.

[0065] In this embodiment, the refrigerator determines whether abnormal vibration of the fan 2 at low temperature has occurred. If abnormal vibration is detected, the fan 2 speed is adjusted. When the abnormal vibration disappears after adjusting the fan 2 speed, it indicates that changing the speed can improve the vibration noise. If the fan 2 speed changes from low to high, it will definitely meet the low temperature maintenance effect of the freezer compartment 111. Therefore, the fan 2 is controlled to maintain high speed operation to improve the user experience. If the fan 2 speed changes from high to low, it is necessary to confirm whether the low speed can meet the low temperature maintenance of the freezer compartment 111. If it can, the fan 2 is controlled to maintain low speed operation to improve the user experience. If it cannot, the display module 7 is controlled to display a second fault alarm. This not only improves the reliability of the freezer compartment 111's low temperature but also makes it easier for users and maintenance personnel to identify the cause of the fault, thus improving maintenance efficiency.

[0066] In some specific embodiments, refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 The controller 6 has a preset sampling duration and is configured as follows: Acquire multiple vibration signals within the sampling time under low temperature mode; acquire the vibration values ​​of each vibration signal at the fundamental frequency and multiple harmonic frequencies of the fan 2 speed, and calculate the average value of the vibration value of each vibration signal at the fundamental frequency of the fan 2 speed and the average value of the vibration value of each vibration signal at the harmonic frequencies of the fan 2 speed, which are used to compare with the vibration value threshold to determine whether abnormal vibration or abnormal vibration of the fan 2 at low temperature occurs.

[0067] That is, the controller 6 presets the sampling duration and is configured to acquire multiple vibration signals within the sampling duration in low temperature mode; it also presets the sampling period to achieve uniformity of the acquisition of each vibration signal within the sampling duration and improve the accuracy of sampling.

[0068] The refrigerator in this embodiment sets a sampling time and collects multiple vibration signals within the sampling time. It determines the vibration values ​​of the fundamental frequency and multiple harmonic frequencies by calculating the average value of the vibration values ​​of the fundamental frequency and multiple harmonic frequencies of the fan 2 rotation speed, thereby improving the accuracy and reliability of the vibration values ​​and thus improving the accuracy and reliability of the judgment of vibration abnormalities and low temperature abnormal vibration of the fan 2.

[0069] In some specific embodiments, refer to Figure 1 , Figure 2 , Figure 3 The refrigerator also includes a compressor 5, which is electrically connected to and controlled by a controller 6.

[0070] The low-temperature mode includes defrost recovery mode, user termination mode, and rapid cooling / freezing mode. These are respectively the operation mode that transitions to normal operation mode after defrosting, the operation mode that transitions to normal operation mode after user use ends, and the operation mode selected by the user for rapid cooling or freezing. All of them aim to achieve rapid cooling by controlling the compressor 5 to operate at high load and the fan 2 to operate at high speed.

[0071] In this embodiment, the refrigerator is limited to judging the low-temperature abnormal vibration of the fan 2 only in the low-temperature mode where the fan 2 is prone to low-temperature abnormal vibration, which saves software and hardware resources, improves control efficiency, and reduces energy consumption.

[0072] Of course, the low temperature mode can also include any other operating mode used for rapid cooling.

[0073] In some specific embodiments, refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 The controller 6 has a preset first cooling time and is configured as follows: Vibration signals are acquired after the system enters low-temperature mode and operates for the first cooling duration. Specifically, a timer is started after entering low-temperature mode, and vibration signals are acquired once the first cooling duration has elapsed.

[0074] In this embodiment, the refrigerator acquires vibration signals after the first cooling time in low-temperature mode to ensure that a low-temperature environment is formed in the air duct 12 that causes abnormal vibration of the fan 2, thereby reducing unnecessary data acquisition, processing and judgment, saving software and hardware resources, improving control efficiency and reducing energy consumption.

[0075] In some specific embodiments, refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 The controller 6 has a preset correction coefficient, configured as follows: Vibration signals acquired during the first sampling period after entering low-temperature mode and running for the first cooling time are used to obtain vibration value thresholds.

[0076] Specifically, the maximum value among the average vibration value of the fundamental frequency of the fan 2 speed, the average vibration value of the single harmonic frequency of the fan 2 speed, the average vibration value of the second harmonic frequency of the fan 2 speed, and the average vibration value of the higher harmonic frequencies is multiplied by the correction coefficient, and the resulting value is used as the vibration value threshold.

[0077] The vibration signal is obtained in a loop within multiple sampling durations after the first sampling duration, and compared with the vibration value threshold to determine the vibration abnormality and the low temperature abnormal vibration of fan 2.

[0078] That is, the refrigerator's operating process also includes: S11. Determine if it is in low temperature mode; if so, execute S111. S111, First cooling time in low temperature mode; When the low temperature mode operation time reaches the first cooling time, execute S121; S121. Acquire multiple vibration signals within the first sampling duration; S122. Obtain the vibration value threshold based on each vibration signal; S13. Loop through and acquire multiple vibration signals for sampling durations after the first sampling duration; S2. Determine whether the vibration is abnormal due to low temperature of fan 2 based on the obtained vibration signal and vibration value threshold.

[0079] In this embodiment, the vibration threshold of the refrigerator is obtained in real time based on its installation and operation, and is obtained in the early stage of low temperature mode cooling, which improves the rationality and accuracy of the vibration threshold, thereby improving the accuracy of judging abnormal vibration of fan 2 and abnormal vibration of fan 2 at low temperature.

[0080] In some specific embodiments, refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 The controller 6 also has a preset vibration value auxiliary threshold S27, configured as follows: S11. Determine if it is in low temperature mode; if so, proceed to S12. S12. Obtain the vibration value threshold; specifically, obtain the product of the maximum value of the fundamental frequency or harmonic frequency vibration value of multiple vibration signals within the first sampling time and the correction coefficient; S13. Acquire vibration signal; specifically, acquire vibration values ​​obtained within the sampling duration after the first sampling duration. S251. The fundamental frequency and / or harmonic frequency vibration values ​​are compared with the vibration value threshold and the vibration value auxiliary threshold, respectively. When either the vibration value threshold or the vibration value auxiliary threshold is reached or exceeded, it is determined that an abnormal vibration or abnormal low temperature vibration of the fan 2 has occurred.

[0081] Specifically, when the vibration value first reaches or exceeds the vibration value threshold or vibration value auxiliary threshold, it is determined that a vibration abnormality has occurred; when the vibration value of the vibration signal obtained after changing the speed of fan 2 after a vibration abnormality occurs reaches or exceeds the vibration value threshold or vibration value auxiliary threshold, it is determined that the fan 2 has low temperature abnormal vibration.

[0082] The refrigerator in this embodiment prevents abnormal vibration thresholds by setting a fixed vibration value auxiliary threshold, thereby achieving redundancy in the vibration value judgment standard when judging abnormal vibration of fan 2 at low temperature, reducing judgment error, and improving the accuracy and reliability of judgment.

[0083] In some specific embodiments, refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 The refrigerator also includes an operation module 8, which is electrically connected to the controller 6; the controller 6 is also equipped with a maintenance mode and is configured to operate the maintenance mode by operating the operation module 8.

[0084] Repair modes include: S10. Control the fan 2 to operate independently at room temperature and acquire vibration signals, and determine whether abnormal vibration at room temperature has occurred based on the acquired vibration signals; the specific judgment can be made by setting a threshold value for room temperature vibration and comparing the maximum value of the vibration signal with the threshold value for room temperature vibration. S20. Set the second cooling time, control the fan 2 to run at high speed and the compressor 5 to run at high load. After the second cooling time, control the compressor 5 to stop. That is, when an ultra-low temperature environment is formed in the refrigeration duct 121 and the refrigeration chamber 111, control the compressor 5 to stop. S30. Obtain the vibration signal of the fan 2 when it is running at high speed, and determine whether there is high-speed low-temperature vibration abnormality based on the obtained vibration signal. Specifically, the judgment can be made by setting a high-speed low-temperature vibration value threshold and comparing the maximum value of the vibration signal with the high-speed low-temperature vibration value threshold. Of course, the high-speed low-temperature vibration value threshold can be a vibration value threshold or a vibration value auxiliary threshold. S40. Control the fan 2 speed to a low speed and acquire the vibration signal. Determine whether there is low-speed, low-temperature vibration abnormality based on the acquired vibration signal. Specifically, the determination can be made by setting a low-speed, low-temperature vibration value threshold and comparing the maximum vibration value of the vibration signal with the low-speed, low-temperature vibration value threshold. Of course, the low-speed, low-temperature vibration value threshold can be a vibration value threshold or a vibration value auxiliary threshold.

[0085] S50. Determine whether a fan 2 malfunction has occurred based on the judgment results of abnormal vibration at normal temperature, abnormal vibration at high speed and low temperature, and abnormal vibration at low speed. If any one or more of the abnormal vibration at normal temperature, abnormal vibration at high speed and low temperature, and abnormal vibration at low speed are true, that is, if any one or more of the abnormal vibration occurs when the fan 2 is operating alone at normal temperature, operating at high speed at low temperature, or operating at low speed at low temperature, confirm that a fan 2 malfunction has occurred and execute S60. S60. Send a third fault signal to the display module 7 and control the display module 7 to display the third fault alarm.

[0086] In this embodiment, the refrigerator is configured with a maintenance mode. When the fan 2 experiences abnormal low-temperature vibration and cannot be improved by increasing the low-temperature shutdown temperature, the maintenance mode separates the normal temperature, low-temperature high-speed, and low-temperature low-speed operation of the fan 2 to confirm whether the abnormal vibration is caused by a fault in the fan 2 or abnormal low-temperature vibration of the fan 2. This improves the efficiency of identifying the source of the fault and thus improves the maintenance efficiency.

[0087] In the description of the above embodiments, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0088] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A refrigerator, characterized in that, include: The enclosure has an internal cavity; the internal cavity is divided into a cold source cavity, an air duct, and a storage compartment. The air duct connects the cold source cavity and the storage compartment; the storage compartment includes a freezer compartment; the air duct includes a freezer air duct, which connects to the freezer compartment; An evaporator, which is disposed in the cold source cavity, is used to deliver cold energy to the storage compartment through the air duct; A fan is installed in the refrigeration air duct and fixedly connected to the housing, driving the air carrying the cold energy from the cold source cavity into the refrigeration chamber; A vibration detection unit is fixedly installed in the refrigeration air duct to detect the vibration of the housing and obtain vibration signals; The controller, which is electrically connected to the fan and the vibration monitoring unit respectively, is configured as follows: Receive the vibration signal; Determine whether abnormal low-temperature vibration of the fan has occurred based on the vibration signal; if so, increase the low-temperature shutdown temperature.

2. The refrigerator according to claim 1, characterized in that, It also includes a display module, which is communicatively connected to the controller; The controller is configured to continue receiving the vibration signal and determine whether the abnormal low-temperature vibration of the fan still exists when the low-temperature shutdown temperature is increased after the abnormal low-temperature vibration of the fan occurs; if so, it sends a first fault alarm signal to the display module and controls the display module to display the first fault alarm.

3. The refrigerator according to claim 2, characterized in that, Determining whether the vibration signal indicates abnormal low-temperature vibration of the fan includes: Obtain the vibration value threshold; Acquire vibration signals during low-temperature mode; Obtain the vibration values ​​of the fundamental frequency and multiple harmonics of the vibration signal at the fan speed; Compare each vibration value with the vibration value threshold; if one or more of the vibration values ​​reach or exceed the vibration value threshold, then the vibration is abnormal; otherwise, there is no vibration abnormality. When the vibration is abnormal, the fan speed is changed and the vibration signal and its fundamental frequency and multiple harmonics at the current fan speed are obtained; if one or more of the vibration values ​​reach or exceed the vibration value threshold, it is a low temperature abnormal vibration of the fan; otherwise, it is not a low temperature abnormal vibration of the fan.

4. The refrigerator according to claim 3, characterized in that, The controller is configured with high speed and low speed; and is configured as follows: If the fan speed is changed and the abnormal vibration is determined to be abnormal vibration due to low temperature of the fan and the abnormal vibration disappears, and if the fan speed is changed from the low speed to the high speed, the fan is fixed to operate at the high speed. If the fan speed changes from the high speed to the low speed, a shutdown judgment period is set, and it is determined whether the fan stops within the shutdown judgment period; if yes, the fan is fixed at the low speed; if no, a second fault alarm signal is sent to the display module to display the second fault alarm.

5. The refrigerator according to claim 4, characterized in that, Set a sampling duration; acquire multiple vibration signals within the sampling duration in low-temperature mode; calculate the average value of the vibration values ​​of each vibration signal at the fan's fundamental frequency and its multiple harmonics, to determine whether it is an abnormal vibration or abnormal low-temperature vibration of the fan.

6. The refrigerator according to claim 5, characterized in that, It also includes a compressor, which is electrically connected to the controller and controlled by the controller; the low temperature mode includes a defrost recovery mode, a user-terminated mode, and a rapid cooling / freezing mode. In the defrost recovery mode, the user termination mode, and the quick cooling / freezing mode, the compressor operates under high load and the fan runs at high speed.

7. The refrigerator according to claim 6, characterized in that, The controller is preset with a first cooling time and configured as follows: After entering the low-temperature mode and running for the first cooling time, the vibration signal is acquired.

8. The refrigerator according to claim 7, characterized in that, The controller has a preset correction coefficient and is configured as follows: The product of the maximum value of each vibration value during the first sampling period after entering the low-temperature mode and operating for the first cooling period, and the correction coefficient, is the vibration value threshold.

9. The refrigerator according to claim 8, characterized in that, The controller also has a preset vibration value auxiliary threshold; and is configured as follows: When one or more of the vibration values ​​reach or exceed the vibration value threshold or the vibration value auxiliary threshold, it is determined that there is a vibration abnormality or a low-temperature vibration abnormality of the fan.

10. The refrigerator according to any one of claims 6 to 9, characterized in that, It also includes an operation module electrically connected to the controller; the controller is further configured with a maintenance mode and is configured to operate the maintenance mode by operating the operation module; The maintenance modes include: The fan is controlled to operate independently at room temperature, and the vibration signal is acquired; the vibration signal is used to determine whether there is an abnormal vibration. A second cooling duration is set, and the fan is controlled to run at the high speed and the compressor is controlled to run at high load. After the second cooling duration, the compressor is stopped. The vibration signal of the fan when it is running at the high speed is acquired; and the vibration signal is used to determine whether there is an abnormal vibration. The fan is controlled to operate at the low speed and the vibration signal is acquired; the vibration signal is used to determine whether the vibration is abnormal. When any one or more of the following vibrations occur during normal temperature operation, low temperature high speed operation, or low temperature low speed operation, a third fault signal is sent to the display module to control it to display a third fault alarm.

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