Method and device for detecting fan failure, air conditioner

Abstract

The application relates to the technical field of air conditioners, and discloses a method for detecting fan failure, which comprises the following steps: obtaining the bearing temperature of a fan bearing, the bearing ambient temperature of the fan bearing, the motor temperature of a fan motor, and the motor ambient temperature of the fan motor. An actual bearing temperature difference is obtained according to the bearing temperature and the bearing ambient temperature; an actual motor temperature difference is obtained according to the motor temperature and the motor ambient temperature. Whether the fan is faulty is determined according to the actual bearing temperature difference and the actual motor temperature difference. In this way, whether the fan is faulty can be determined according to the actual bearing temperature difference and the actual motor temperature difference in a timely manner after the fan is faulty. Therefore, the timeliness of detecting fan failure is improved. The application further discloses a device for detecting fan failure and an air conditioner.

Description

Technical Field

[0001] This application relates to the field of air conditioner technology, such as a method and apparatus for detecting fan malfunctions, and an air conditioner. Background Technology

[0002] Air conditioners have become indispensable household appliances in people's daily lives. The fan is a crucial component of any air conditioner, used to blow cool or warm air into the room to regulate the temperature. An air conditioner's fan typically consists of fan blades, a motor, and fan bearings, with the motor and bearings located at opposite ends of the fan blades. The rotating motor drives the fan blades to rotate, creating airflow. The fan bearings reduce friction during rotation and ensure the blades' rotational accuracy, allowing for stable and continuous rotation. However, during use, fans may fail to rotate or experience obstructed rotation. After a period of fan malfunction, the temperature of the air conditioner's internal coil may become excessively high or low. If the internal coil temperature is too low, it may freeze. If the internal coil temperature is too high, it will trigger the air conditioner's internal coil protection, causing the air conditioner to shut down. Therefore, fan malfunctions not only reduce the efficiency of indoor temperature regulation but also damage other components of the air conditioner, shortening its lifespan. In related technologies, the presence or absence of a fan malfunction is typically determined by whether the temperature of the internal coil is within a preset range. If the temperature of the internal coil is within the preset range, the fan is considered to be functioning correctly. If the temperature of the internal coil is outside the preset range, the fan is considered to have malfunctioned.

[0003] In implementing the embodiments of this disclosure, it was found that the related technology has at least the following problems: Because the temperature of the inner coil only changes significantly after a period of time following a fan malfunction, the temperature of the inner coil may not be within the preset range. The related technology determines whether the fan has malfunctioned by whether the temperature of the inner coil is within the preset range. This results in low timeliness.

[0004] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this application, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0005] To provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. This summary is not intended as a general commentary, nor is it intended to identify key / important components or describe the scope of protection of these embodiments, but rather as a prelude to the detailed description that follows.

[0006] This disclosure provides a method and apparatus for detecting fan malfunctions, as well as an air conditioner, to improve the timeliness of fan malfunction detection.

[0007] In some embodiments, the method for detecting fan faults includes: acquiring the bearing temperature of the fan bearing, the ambient temperature of the fan bearing, the motor temperature of the fan motor, and the ambient temperature of the fan motor; acquiring the actual bearing temperature difference based on the bearing temperature and the ambient temperature; acquiring the actual motor temperature difference based on the motor temperature and the ambient temperature; and determining whether the fan is faulty based on the actual bearing temperature difference and the actual motor temperature difference.

[0008] In some embodiments, determining whether the fan is faulty based on the actual bearing temperature difference and the actual motor temperature difference includes: obtaining the set speed of the fan; obtaining the first motor temperature difference corresponding to the set speed; and determining whether the fan is faulty based on the first motor temperature difference, the actual bearing temperature difference, and the actual motor temperature difference.

[0009] In some embodiments, determining whether the fan is faulty based on the first motor temperature difference, the actual bearing temperature difference, and the actual motor temperature difference includes: determining the fan is faulty when the actual motor temperature difference is greater than a preset second motor temperature difference, the actual motor temperature difference is less than the first motor temperature difference, and the actual bearing temperature difference is equal to a preset first bearing temperature difference.

[0010] In some embodiments, determining whether the fan is faulty based on the first motor temperature difference, the actual bearing temperature difference, and the actual motor temperature difference includes: obtaining the second bearing temperature difference corresponding to a set speed. If the actual motor temperature difference is greater than the first motor temperature difference and the actual bearing temperature difference is not equal to the second bearing temperature difference, a fan fault is determined.

[0011] In some embodiments, when the actual motor temperature difference is greater than the preset second motor temperature difference, the actual motor temperature difference is less than the first motor temperature difference, and the actual bearing temperature difference is equal to the preset first bearing temperature difference, the method further includes: determining the fan motor idling as determining the fan's fault type.

[0012] In some embodiments, when the actual motor temperature difference is greater than the first motor temperature difference and the actual bearing temperature difference is not equal to the second bearing temperature difference, the method further includes: if the actual bearing temperature difference is greater than the second bearing temperature difference, determining the obstruction of fan bearing rotation as a fault type of the fan. And / or, if the actual bearing temperature difference is less than the second bearing temperature difference, determining the obstruction of fan blade rotation as a fault type of the fan.

[0013] In some embodiments, the method for detecting fan faults further includes: determining a fan fault when the actual motor temperature difference is equal to a preset second motor temperature difference.

[0014] In some embodiments, when the actual motor temperature difference is equal to a preset second motor temperature difference, the method further includes: determining the fan motor fault as the type of fan fault.

[0015] In some embodiments, the apparatus for detecting wind turbine faults includes a processor and a memory storing program instructions, the processor being configured to execute the method for detecting wind turbine faults described above when the program instructions are executed.

[0016] In some embodiments, the air conditioner includes an air conditioner body. The aforementioned device for detecting fan malfunction is installed on the air conditioner body.

[0017] The method, apparatus, and air conditioner for detecting fan faults provided in this disclosure can achieve the following technical effects: By acquiring the bearing temperature of the fan bearing, the ambient temperature of the fan bearing, the motor temperature of the fan motor, and the ambient temperature of the fan motor, the actual bearing temperature difference is obtained based on the bearing temperature and the ambient temperature, and the actual motor temperature difference is obtained based on the motor temperature and the ambient temperature. The fan fault is then determined based on these actual bearing temperature differences and the actual motor temperature differences. This is because a fan fault will immediately cause changes in the bearing temperature of the fan bearing and the motor temperature of the fan motor, leading to changes in the actual bearing temperature difference and the actual motor temperature difference obtained from these two measurements. Compared to determining whether the air conditioner has malfunctioned by checking whether the temperature of the internal coil is within a preset range some time after the fan fault occurs, this solution determines whether the fan fault is caused by the actual bearing temperature difference obtained from the bearing temperature and the ambient temperature, and the actual motor temperature difference obtained from the motor temperature and the ambient temperature. This allows for timely determination of fan fault status based on the actual bearing temperature difference and the actual motor temperature difference after a fan fault occurs. This improves the timeliness of detecting fan malfunctions.

[0018] The above general description and the description below are exemplary and illustrative only and are not intended to limit this application. Attached Figure Description

[0019] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations and drawings do not constitute a limitation on the embodiments. Elements having the same reference numerals in the drawings are shown as similar elements. The drawings are not to be scaled. And wherein:

[0020] Figure 1 This is a schematic diagram of a method for detecting fan malfunctions provided in an embodiment of this disclosure;

[0021] Figure 2 This is a schematic diagram of another method for detecting fan malfunctions provided in an embodiment of this disclosure;

[0022] Figure 3 This is a schematic diagram of yet another method for detecting fan malfunctions provided in this disclosure embodiment;

[0023] Figure 4 This is a schematic diagram of another method for detecting fan faults provided in an embodiment of this disclosure;

[0024] Figure 5 This is a schematic diagram of a device for detecting fan malfunctions provided in an embodiment of this disclosure;

[0025] Figure 6 This is a schematic diagram of an air conditioner provided in an embodiment of this disclosure. Detailed Implementation

[0026] To provide a more detailed understanding of the features and technical content of the embodiments of this disclosure, the implementation of the embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for illustrative purposes only and are not intended to limit the embodiments of this disclosure. In the following technical description, for ease of explanation, several details are used to provide a full understanding of the disclosed embodiments. However, one or more embodiments may still be implemented without these details. In other cases, well-known structures and devices may be simplified in their depiction to simplify the drawings.

[0027] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this disclosure described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0028] Unless otherwise stated, the term "multiple" means two or more.

[0029] In this embodiment of the disclosure, the character " / " indicates that the objects before and after it are in an "or" relationship. For example, A / B means: A or B.

[0030] The term "and / or" describes an association between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or A and B.

[0031] The term "correspondence" can refer to an association or binding relationship. The correspondence between A and B means that there is an association or binding relationship between A and B.

[0032] The method for detecting fan malfunctions provided in this disclosure is applied to an air conditioner. The air conditioner acquires the bearing temperature of the fan bearing, the ambient temperature of the fan bearing, the motor temperature of the fan motor, and the ambient temperature of the fan motor. The actual bearing temperature difference is obtained based on the bearing temperature and the ambient temperature; the actual motor temperature difference is obtained based on the motor temperature and the ambient temperature. Then, the fan malfunction is determined based on the actual bearing temperature difference and the actual motor temperature difference. Thus, compared to determining whether the air conditioner has malfunctioned by checking whether the temperature of the internal coil is within a preset range some time after the fan malfunctions, this solution determines whether the fan malfunctions by using the actual bearing temperature difference obtained from the bearing temperature and the ambient temperature, and the actual motor temperature difference obtained from the motor temperature and the ambient temperature. This allows for timely determination of fan malfunctions after they occur, thereby improving the timeliness of fan malfunction detection.

[0033] This fan is the indoor fan of an air conditioner, that is, the fan of the indoor unit of an air conditioner.

[0034] Furthermore, the air conditioner also includes a bearing temperature sensor, a bearing ambient temperature sensor, a motor temperature sensor, and a motor ambient temperature sensor. The bearing ambient temperature sensor and the bearing temperature sensor are both mounted on the fan bearing. The bearing temperature sensor detects the real-time surface temperature of the fan bearing. The bearing ambient temperature sensor is 3 cm apart from the bearing temperature sensor and is used to detect the real-time temperature of the environment surrounding the fan bearing. The motor ambient temperature sensor and the motor temperature sensor are both mounted on the motor. The motor temperature sensor detects the real-time surface temperature of the fan motor. The motor ambient temperature sensor is 3 cm apart from the motor temperature sensor and is used to detect the real-time temperature of the environment surrounding the fan motor. Thus, the 3 cm spacing between the bearing ambient temperature sensor and the bearing temperature sensor reduces the influence of the fan bearing temperature on the ambient temperature of the fan bearing. The 3 cm spacing between the motor ambient temperature sensor and the motor temperature sensor reduces the influence of the fan motor temperature on the ambient temperature of the fan motor.

[0035] Combination Figure 1 As shown in the embodiments of this disclosure, a method for detecting fan malfunctions is provided, comprising:

[0036] In step S101, the air conditioner acquires the bearing temperature of the fan bearing, the bearing ambient temperature of the fan bearing, the motor temperature of the fan motor, and the motor ambient temperature of the fan motor.

[0037] In step S102, the air conditioner obtains the actual bearing temperature difference based on the bearing temperature and the bearing ambient temperature. It also obtains the actual motor temperature difference based on the motor temperature and the motor ambient temperature.

[0038] Step S103: The air conditioner determines whether the fan is faulty based on the actual bearing temperature difference and the actual motor temperature difference.

[0039] The method for detecting fan faults provided in this disclosure acquires the bearing temperature of the fan bearing, the ambient temperature of the fan bearing, the motor temperature of the fan motor, and the ambient temperature of the fan motor. Then, it obtains the actual bearing temperature difference based on the bearing temperature and the ambient temperature, and the actual motor temperature difference based on the motor temperature and the ambient temperature. Finally, it determines whether the fan is faulty based on these actual bearing and motor temperature differences. This is because a fan fault will immediately cause changes in the bearing temperature and the motor temperature, leading to changes in the actual bearing temperature difference and the actual motor temperature difference obtained from these measurements. Compared to determining whether the air conditioner is faulty by checking if the internal coil temperature is within a preset range some time after the fan malfunctions, this solution determines whether the fan is faulty by using the actual bearing temperature difference and the actual motor temperature difference obtained from these measurements. This allows for timely determination of fan faults after a fault occurs, improving the timeliness of fan fault detection.

[0040] Furthermore, the air conditioner acquires the bearing temperature of the fan bearing, including: acquiring the real-time surface temperature of the fan bearing detected by a bearing temperature sensor. The air conditioner determines the real-time surface temperature of this fan bearing as the bearing temperature of the fan bearing.

[0041] Furthermore, the air conditioner acquires the bearing ambient temperature of the fan bearing, including: acquiring the real-time temperature of the environment where the fan bearing is located, detected by a bearing ambient temperature sensor. The air conditioner determines the real-time temperature of the environment where the fan bearing is located as the bearing ambient temperature of the fan bearing.

[0042] Furthermore, the air conditioner acquires the fan motor temperature, including: acquiring the real-time surface temperature of the fan motor detected by a motor temperature sensor. The air conditioner determines this real-time surface temperature of the fan motor as the fan motor temperature.

[0043] Furthermore, the air conditioner acquires the ambient temperature of the fan motor, including: acquiring the real-time temperature of the environment where the fan motor is located, detected by the motor ambient temperature sensor. The air conditioner determines the real-time temperature of the environment where the fan motor is located as the ambient temperature of the fan motor.

[0044] In this way, by defining the real-time surface temperature of the fan bearing as the bearing temperature, the real-time ambient temperature of the fan bearing as the bearing temperature, the real-time surface temperature of the fan motor as the motor temperature, and the real-time ambient temperature of the fan motor as the motor temperature, it is possible to determine the actual real-time temperature difference between the bearing temperature and the ambient temperature, and between the motor temperature and the ambient temperature, and to determine whether the fan is malfunctioning based on these real-time measurements. This improves the real-time performance of fan fault detection.

[0045] Furthermore, the air conditioner obtains the actual bearing temperature difference based on the bearing temperature and the bearing ambient temperature, including: the air conditioner determines the difference between the bearing temperature and the bearing ambient temperature as the actual bearing temperature difference.

[0046] Furthermore, the air conditioner obtains the actual motor temperature difference based on the motor temperature and the ambient temperature of the motor, including: the air conditioner determines the difference between the motor temperature and the ambient temperature of the motor as the actual motor temperature difference.

[0047] In some embodiments, the actual bearing temperature difference characterizes the heat generated by the bearing rotation. A larger actual bearing temperature difference indicates more heat generated by the bearing rotation. A smaller actual bearing temperature difference indicates less heat generated by the bearing rotation. Similarly, the actual motor temperature difference characterizes the heat generated by the motor rotation. A larger actual motor temperature difference indicates more heat generated by the motor rotation. A smaller actual motor temperature difference indicates less heat generated by the motor rotation.

[0048] Optionally, the air conditioner determines whether the fan is faulty based on the actual bearing temperature difference and the actual motor temperature difference, including: the air conditioner acquiring the set speed of the fan; the air conditioner acquiring the first motor temperature difference corresponding to the set speed; and the air conditioner determining whether the fan is faulty based on the first motor temperature difference, the actual bearing temperature difference, and the actual motor temperature difference. This allows for timely and accurate determination of fan fault status after a fault occurs, based on the first motor temperature difference corresponding to the set speed, the actual bearing temperature difference, and the actual motor temperature difference, thereby improving the accuracy and timeliness of fan fault detection.

[0049] The set speed of the fan is the target speed of the fan when it is not malfunctioning.

[0050] Furthermore, the air conditioner obtains the first motor temperature difference corresponding to the set speed, including: the air conditioner performs a lookup operation using a preset motor temperature difference database to obtain the first motor temperature difference corresponding to the set speed. The preset motor temperature difference database stores the correspondence between the set speed and the first motor temperature difference. The correspondence between the set speed and the first motor temperature difference is obtained through laboratory testing.

[0051] Optionally, the air conditioner determines whether the fan is faulty based on the first motor temperature difference, the first bearing temperature difference, the actual bearing temperature difference, and the actual motor temperature difference, including: the air conditioner determines that the fan is not faulty when the actual motor temperature difference is greater than a preset second motor temperature difference, or when the actual motor temperature difference is less than the first motor temperature difference and the actual bearing temperature difference is greater than a preset first bearing temperature difference. And / or, the air conditioner obtains the second bearing temperature difference corresponding to the set speed. The air conditioner determines that the fan is not faulty when the actual motor temperature difference is greater than the first motor temperature difference and the actual bearing temperature difference is equal to the second bearing temperature difference.

[0052] The preset temperature difference for the second motor is 0. The preset temperature difference for the first bearing is 0.

[0053] Optionally, the air conditioner determines whether the fan is faulty based on the first motor temperature difference, the actual bearing temperature difference, and the actual motor temperature difference. This includes determining a fan fault when the actual motor temperature difference is greater than a preset second motor temperature difference, or when the actual motor temperature difference is less than the first motor temperature difference and the actual bearing temperature difference is equal to a preset first bearing temperature difference. This allows for timely detection of fan faults when the actual motor temperature difference is greater than the preset second motor temperature difference, less than the first motor temperature difference, and equal to the preset first bearing temperature difference, thereby improving the accuracy and timeliness of fan fault detection.

[0054] Furthermore, when the actual motor temperature difference is greater than the preset second motor temperature difference, the actual motor temperature difference is less than the first motor temperature difference, and the actual bearing temperature difference is equal to the preset first bearing temperature difference, the air conditioner further includes: determining the fan motor's idling as a fault type. This allows the fault type of the fan to be determined, facilitating troubleshooting by the user.

[0055] In some embodiments, the preset first bearing temperature difference is 0. The actual motor temperature difference is greater than the preset second motor temperature difference but less than the first motor temperature difference, indicating that the motor is rotating. The actual bearing temperature difference equals the preset first bearing temperature difference, i.e., the actual bearing temperature difference is 0. This means the bearing temperature of the fan bearing is equal to the ambient temperature of the fan bearing. Therefore, the heat generated when the fan bearing rotates is 0. Thus, the fan bearing is not rotating. That is, the fan blades are not rotating. The motor rotates, but the fan blades do not rotate, meaning the connection between the fan blades and the motor is broken, causing the motor to idle. Therefore, the fault type of the fan is fan motor idling.

[0056] Combination Figure 2 As shown in the embodiments of this disclosure, another method for detecting fan malfunctions is provided, including:

[0057] In step S201, the air conditioner acquires the bearing temperature of the fan bearing, the bearing ambient temperature of the fan bearing, the motor temperature of the fan motor, and the motor ambient temperature of the fan motor.

[0058] In step S202, the air conditioner obtains the actual bearing temperature difference based on the bearing temperature and the bearing ambient temperature. It also obtains the actual motor temperature difference based on the motor temperature and the motor ambient temperature.

[0059] In step S203, if the actual motor temperature difference is greater than the preset second motor temperature difference, the actual motor temperature difference is less than the first motor temperature difference, and the actual bearing temperature difference is equal to the preset first bearing temperature difference, the air conditioner determines that the fan is faulty.

[0060] Step S204: The air conditioner determines the fault type of the fan by identifying the fan motor running idle.

[0061] The method for detecting fan faults provided in this disclosure acquires the bearing temperature of the fan bearing, the ambient temperature of the fan bearing, the motor temperature of the fan motor, and the ambient temperature of the fan motor. Then, it obtains the actual bearing temperature difference based on the bearing temperature and the ambient temperature, and the actual motor temperature difference based on the motor temperature and the ambient temperature. A fan fault is determined when the actual motor temperature difference is greater than a preset second motor temperature difference, less than a preset first motor temperature difference, and the actual bearing temperature difference equals a preset first bearing temperature difference. Idle fan operation is defined as the fault type. This allows for timely and accurate fault type determination when a fan motor idle fault occurs, provided the actual motor temperature difference is greater than a preset second motor temperature difference, less than a preset first motor temperature difference, and the actual bearing temperature difference equals a preset first bearing temperature difference. This improves the accuracy and timeliness of fan fault detection, facilitating user troubleshooting for idle fan motor faults.

[0062] Optionally, the air conditioner determines whether the fan is faulty based on the first motor temperature difference, the actual bearing temperature difference, and the actual motor temperature difference, including: the air conditioner obtaining the second bearing temperature difference corresponding to the set speed. The air conditioner determines a fan fault if the actual motor temperature difference is greater than the first motor temperature difference but the actual bearing temperature difference is not equal to the second bearing temperature difference. This allows for timely detection of fan faults even when the actual motor temperature difference is greater than the first motor temperature difference and the actual bearing temperature difference is not equal to the second bearing temperature difference corresponding to the set speed, thereby improving the accuracy and timeliness of fan fault detection.

[0063] Furthermore, the air conditioner obtains the second bearing temperature difference corresponding to the set speed by: the air conditioner performing a lookup operation using a preset bearing temperature difference database to obtain the second bearing temperature difference corresponding to the set speed. The preset bearing temperature difference database stores the correspondence between the set speed and the second bearing temperature difference. The correspondence between the set speed and the second bearing temperature difference is obtained through multiple tests in the laboratory.

[0064] Furthermore, when the actual motor temperature difference is greater than the first motor temperature difference and the actual bearing temperature difference is not equal to the second bearing temperature difference, the system further includes: if the actual bearing temperature difference is greater than the second bearing temperature difference, determining obstructed fan bearing rotation is identified as the fault type of the fan. And / or, if the actual bearing temperature difference is less than the second bearing temperature difference, determining obstructed fan blade rotation is identified as the fault type of the fan. This allows for determining the fan fault type as obstructed fan bearing rotation when the actual bearing temperature difference is greater than the second bearing temperature difference, and determining the fan fault type as obstructed fan blade rotation when the actual bearing temperature difference is less than the second bearing temperature difference. This facilitates user troubleshooting for either obstructed fan bearing rotation or obstructed fan blade rotation.

[0065] In some embodiments, a greater actual motor temperature difference than a first motor temperature difference indicates that more heat is generated by friction during motor rotation, meaning the motor rotates faster and is under heavier load. If a greater actual bearing temperature difference than a second bearing temperature difference indicates a larger actual bearing temperature difference, resulting in greater friction between the bearing and the fan blades during bearing rotation. Consequently, bearing rotation is hindered.

[0066] In some embodiments, a greater actual motor temperature difference than a first motor temperature difference indicates that more heat is generated by friction during motor rotation, meaning the motor rotates faster and under heavier load. If the actual bearing temperature difference is less than a second bearing temperature difference, it indicates that the actual bearing temperature difference is too small, meaning the friction between the bearing and the fan blades is too large during bearing rotation. Consequently, the bearing rotates more slowly, and therefore the fan blades rotate more slowly. Thus, fan blade rotation is hindered.

[0067] Combination Figure 3 As shown in the embodiments of this disclosure, another method for detecting fan malfunctions is provided, including:

[0068] In step S301, the air conditioner acquires the bearing temperature of the fan bearing, the bearing ambient temperature of the fan bearing, the motor temperature of the fan motor, and the motor ambient temperature of the fan motor.

[0069] In step S302, the air conditioner obtains the actual bearing temperature difference based on the bearing temperature and the bearing ambient temperature. It also obtains the actual motor temperature difference based on the motor temperature and the motor ambient temperature.

[0070] Step S303: The air conditioner obtains the temperature difference of the second bearing corresponding to the set speed.

[0071] Step S304: If the actual motor temperature difference is greater than the first motor temperature difference and the actual bearing temperature difference is not equal to the second bearing temperature difference, the air conditioner determines that the fan is faulty.

[0072] Step S305: If the actual bearing temperature difference of the air conditioner is greater than the second bearing temperature difference, the obstruction of fan bearing rotation is determined as the fault type of the fan. And / or, if the actual bearing temperature difference of the air conditioner is less than the second bearing temperature difference, the obstruction of fan blade rotation is determined as the fault type of the fan.

[0073] The method for detecting fan faults provided in this disclosure acquires the bearing temperature of the fan bearing, the ambient temperature of the fan bearing, the motor temperature of the fan motor, and the ambient temperature of the fan motor. Then, it obtains the actual bearing temperature difference based on the bearing temperature and the ambient temperature, and the actual motor temperature difference based on the motor temperature and the ambient temperature. It also obtains the second bearing temperature difference corresponding to a set speed. If the actual motor temperature difference is greater than the first motor temperature difference but the actual bearing temperature difference is not equal to the second bearing temperature difference, a fan fault is determined. If the actual bearing temperature difference is greater than the second bearing temperature difference, the fan bearing rotation obstruction is determined as the fan fault type. If the actual bearing temperature difference is less than the second bearing temperature difference, the fan blade rotation obstruction is determined as the fan fault type. Thus, a fan fault is determined when the actual motor temperature difference is greater than the first motor temperature difference but the actual bearing temperature difference is not equal to the second bearing temperature difference corresponding to the set speed. This allows for timely detection of fan faults and, when the actual bearing temperature difference is greater than the second bearing temperature difference, accurately determines the fan fault type as fan bearing rotation obstruction. When the actual bearing temperature difference is less than the second bearing temperature difference, the fault type of the fan can be accurately determined to be obstructed fan blade rotation. This improves the accuracy and timeliness of fan fault detection, making it easier for users to troubleshoot and repair fan faults involving obstructed bearing rotation or obstructed fan blade rotation.

[0074] Optionally, the method for detecting fan faults further includes: determining a fan fault when the actual motor temperature difference equals a preset second motor temperature difference. This allows for timely determination of fan faults when the actual motor temperature difference equals the preset second motor temperature difference, thereby improving the accuracy and timeliness of fan fault detection.

[0075] Furthermore, when the actual motor temperature difference equals the preset second motor temperature difference, the air conditioner also includes: identifying the fan motor fault as the fault type of the fan. This allows for accurate identification of the fan fault type as a fan motor fault, facilitating troubleshooting by the user.

[0076] In some embodiments, the preset second motor temperature difference is 0. The actual motor temperature difference is equal to the preset second motor temperature difference, i.e., the actual motor temperature difference is 0. This means the fan motor temperature is equal to the ambient temperature of the fan motor. Therefore, the heat generated when the fan motor rotates is 0. Consequently, the fan motor does not rotate. Therefore, the fan fault type is fan motor fault.

[0077] Furthermore, the method for detecting wind turbine faults also includes: upon determining a wind turbine fault, sending the fault type to the user terminal to remind the user to perform maintenance on the wind turbine. This allows the user to perform targeted maintenance based on the fault type when a wind turbine malfunctions.

[0078] Combination Figure 4 As shown in the embodiments of this disclosure, another method for detecting wind turbine faults is provided, including:

[0079] In step S401, the air conditioner acquires the bearing temperature of the fan bearing, the bearing ambient temperature of the fan bearing, the motor temperature of the fan motor, and the motor ambient temperature of the fan motor.

[0080] In step S402, the air conditioner obtains the actual bearing temperature difference based on the bearing temperature and the bearing ambient temperature; and obtains the actual motor temperature difference based on the motor temperature and the motor ambient temperature.

[0081] Step S403: The air conditioner obtains the set speed of the fan.

[0082] Step S404: The air conditioner obtains the first motor temperature difference corresponding to the set speed.

[0083] In step S405, if the actual motor temperature difference is greater than the preset second motor temperature difference, the actual motor temperature difference is less than the first motor temperature difference, and the actual bearing temperature difference is equal to the preset first bearing temperature difference, a fan fault is determined. The fan motor running idle is then identified as the fault type.

[0084] Step S406: The air conditioner obtains the temperature difference of the second bearing corresponding to the set speed.

[0085] Step S407: If the actual motor temperature difference is greater than the first motor temperature difference and the actual bearing temperature difference is not equal to the second bearing temperature difference, the air conditioner determines that the fan is faulty.

[0086] In step S408, if the actual bearing temperature difference is greater than the second bearing temperature difference, the air conditioner determines the fan bearing rotation obstruction as the fault type of the fan.

[0087] Step S409: If the actual bearing temperature difference is less than the second bearing temperature difference, the air conditioner determines the fan blade rotation obstruction as the fault type of the fan.

[0088] In step S410, if the actual motor temperature difference is equal to the preset second motor temperature difference, the air conditioner determines that the fan is faulty. The fan motor fault is then identified as the fault type of the fan.

[0089] Step S411: If the actual motor temperature difference is greater than the preset second motor temperature difference, the actual motor temperature difference is less than the first motor temperature difference, and the actual bearing temperature difference is greater than the preset first bearing temperature difference, then the fan is determined to be not faulty.

[0090] In step S412, the air conditioner obtains the temperature difference of the second bearing corresponding to the set speed. If the actual motor temperature difference is greater than the first motor temperature difference and the actual bearing temperature difference is equal to the second bearing temperature difference, it is determined that the fan is not faulty.

[0091] The method for detecting fan faults provided in this disclosure acquires the bearing temperature of the fan bearing, the ambient temperature of the fan bearing, the motor temperature of the fan motor, and the ambient temperature of the fan motor. Then, it obtains the actual bearing temperature difference based on the bearing temperature and the ambient temperature, and the actual motor temperature difference based on the motor temperature and the ambient temperature. Finally, it determines whether the motor is faulty based on one or more of the actual motor temperature difference, the actual bearing temperature difference, a first motor temperature difference corresponding to a set speed, and a second bearing temperature difference corresponding to a set speed. If the motor is faulty, it determines the type of motor fault. This improves the accuracy and timeliness of fan fault detection, facilitating user troubleshooting for fan motor idling faults.

[0092] Combination Figure 5 As shown in the figure, this disclosure provides an apparatus 1 for detecting wind turbine faults, including a processor 100 and a memory 101. Optionally, the apparatus may further include a communication interface 102 and a bus 103. The processor 100, communication interface 102, and memory 101 can communicate with each other via the bus 103. The communication interface 102 can be used for information transmission. The processor 100 can call logical instructions in the memory 101 to execute the method for detecting wind turbine faults described in the above embodiment.

[0093] Furthermore, the logic instructions in the aforementioned memory 101 can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium.

[0094] The memory 101, as a computer-readable storage medium, can be used to store software programs and computer-executable programs, such as program instructions / modules corresponding to the methods in the embodiments of this disclosure. The processor 100 executes functional applications and data processing by running the program instructions / modules stored in the memory 101, that is, it implements the method for detecting wind turbine faults in the above embodiments.

[0095] The memory 101 may include a program storage area and a data storage area. The program storage area may store the operating system and applications required for at least one function; the data storage area may store data created based on the use of the terminal device. Furthermore, the memory 101 may include high-speed random access memory and may also include non-volatile memory.

[0096] The device for detecting fan faults provided in this disclosure acquires the bearing temperature of the fan bearing, the ambient temperature of the fan bearing, the motor temperature of the fan motor, and the ambient temperature of the fan motor. Then, it obtains the actual bearing temperature difference based on the bearing temperature and the ambient temperature, and the actual motor temperature difference based on the motor temperature and the ambient temperature. Finally, it determines whether the fan is faulty based on these actual bearing and motor temperature differences. This is because a fan fault will immediately cause changes in the bearing temperature and the motor temperature, leading to changes in the actual bearing temperature difference and the actual motor temperature difference obtained from these measurements. Compared to determining whether the air conditioner is faulty by checking if the internal coil temperature is within a preset range some time after the fan malfunctions, this solution determines whether the fan is faulty by using the actual bearing temperature difference and the actual motor temperature difference obtained from these measurements. This allows for timely determination of fan fault detection after a fault occurs, improving the timeliness of fan fault detection.

[0097] Combination Figure 6 As shown, this disclosure provides an air conditioner 2, including: an air conditioner body and the aforementioned device 1 for detecting fan malfunctions. The device 1 for detecting fan malfunctions is installed in the air conditioner body. The installation relationship described herein is not limited to placement inside the air conditioner, but also includes installation connections with other components of the air conditioner, including but not limited to physical connections, electrical connections, or signal transmission connections. Those skilled in the art will understand that the device 1 for detecting fan malfunctions can be adapted to any feasible air conditioner body, thereby realizing other feasible embodiments.

[0098] The air conditioner provided in this embodiment acquires the bearing temperature of the fan bearing, the ambient temperature of the fan bearing, the motor temperature of the fan motor, and the ambient temperature of the fan motor. Then, it obtains the actual bearing temperature difference based on the bearing temperature and the ambient temperature, and the actual motor temperature difference based on the motor temperature and the ambient temperature. Finally, it determines whether the fan is malfunctioning based on these actual bearing and motor temperature differences. This is because a fan malfunction will immediately cause changes in the bearing temperature and the motor temperature, leading to changes in the actual bearing temperature difference and the actual motor temperature difference obtained from these measurements. Compared to determining whether the air conditioner is malfunctioning by checking if the indoor coil temperature is within a preset range some time after the fan malfunctions, this solution determines whether the fan is malfunctioning by using the actual bearing temperature difference and the actual motor temperature difference obtained from these measurements. This allows for timely determination of fan malfunction after a malfunction occurs, improving the timeliness of fan malfunction detection.

[0099] This disclosure provides a computer-readable storage medium storing computer-executable instructions configured to perform the above-described method for detecting wind turbine faults.

[0100] The aforementioned computer-readable storage medium may be a transient computer-readable storage medium or a non-transitory computer-readable storage medium.

[0101] The technical solutions of this disclosure can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes one or more instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the method described in this disclosure. The aforementioned storage medium can be a non-transitory storage medium, including: a USB flash drive, a portable hard drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and other media capable of storing program code; it can also be a transient storage medium.

[0102] The foregoing description and accompanying drawings fully illustrate embodiments of this disclosure to enable those skilled in the art to practice them. Other embodiments may include structural, logical, electrical, procedural, and other changes. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the order of operation may vary. Parts and features of some embodiments may be included in or replace parts and features of other embodiments. Moreover, the terminology used in this application is for describing embodiments only and is not intended to limit the claims. As used in the description of embodiments and claims, the singular forms “a,” “an,” and “the” are intended to equally include the plural forms unless the context clearly indicates otherwise. Similarly, the term “and / or” as used in this application means including one or more of the associated listed items and all possible combinations thereof. Additionally, when used in this application, the term "comprise" and its variations "comprises" and / or "comprising" refer to the presence of stated features, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or groups thereof. Without further limitations, an element defined by the phrase "comprises a..." does not exclude the presence of other identical elements in the process, method, or apparatus that includes said element. In this document, each embodiment may focus on the differences from other embodiments, and similar or identical parts between embodiments can be referred to mutually. For methods, products, etc., disclosed in the embodiments, if they correspond to the method section disclosed in the embodiments, the relevant parts can be referred to the description of the method section.

[0103] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the embodiments of this disclosure. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0104] The methods and products (including but not limited to devices and equipment) disclosed in the embodiments herein can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For instance, the division of units may be merely a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the shown or discussed units may be through some interfaces, and the indirect coupling or communication connection between devices or units may be electrical, mechanical, or other forms. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of the units may be selected to implement this embodiment according to actual needs. Furthermore, the functional units in the embodiments of this disclosure may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0105] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to embodiments of this disclosure. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. In some alternative implementations, the functions marked in the blocks may occur in a different order than that shown in the drawings. For example, two consecutive blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. In the descriptions corresponding to the flowcharts and block diagrams in the accompanying drawings, the operations or steps corresponding to different blocks may also occur in a different order than disclosed in the description, and sometimes there is no specific order between different operations or steps. For example, two consecutive operations or steps may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. Each block in a block diagram and / or flowchart, and combinations of blocks in a block diagram and / or flowchart, can be implemented using a dedicated hardware-based system that performs the specified function or action, or using a combination of dedicated hardware and computer instructions.

Claims

1. A method for detecting fan malfunctions, characterized in that, include: Obtain the bearing temperature of the fan bearing, the ambient temperature of the fan bearing, the motor temperature of the fan motor, and the ambient temperature of the fan motor. The actual bearing temperature difference is obtained based on the bearing temperature and the bearing ambient temperature; the actual motor temperature difference is obtained based on the motor temperature and the motor ambient temperature. Determine if the fan is faulty based on the actual bearing temperature difference and the actual motor temperature difference. The process of determining whether the fan is faulty based on the actual bearing temperature difference and the actual motor temperature difference includes: obtaining the set speed of the fan; obtaining the first motor temperature difference corresponding to the set speed; and determining whether the fan is faulty based on the first motor temperature difference, the actual bearing temperature difference, and the actual motor temperature difference. The method of determining whether the fan is faulty based on the temperature difference of the first motor, the actual bearing temperature difference, and the actual motor temperature difference includes: determining the fan faulty when the actual motor temperature difference is greater than the preset temperature difference of the second motor, the actual motor temperature difference is less than the temperature difference of the first motor, and the actual bearing temperature difference is equal to the preset temperature difference of the first bearing.

2. The method according to claim 1, characterized in that, Determining whether the fan is faulty based on the temperature difference of the first motor, the actual bearing temperature difference, and the actual motor temperature difference includes: Obtain the temperature difference of the second bearing corresponding to the set rotation speed; If the actual motor temperature difference is greater than the first motor temperature difference and the actual bearing temperature difference is not equal to the second bearing temperature difference, the fan is determined to be faulty.

3. The method according to claim 1, characterized in that, In the case where the actual motor temperature difference is greater than the preset second motor temperature difference, the actual motor temperature difference is less than the first motor temperature difference, and the actual bearing temperature difference is equal to the preset first bearing temperature difference, the following is also included: Determining the type of fault in a fan by identifying the fan motor running idle.

4. The method according to claim 2, characterized in that, In cases where the actual motor temperature difference is greater than the first motor temperature difference and the actual bearing temperature difference is not equal to the second bearing temperature difference, the following is also included: If the actual bearing temperature difference is greater than the second bearing temperature difference, the obstruction of fan bearing rotation is determined as the fault type of the fan; and / or, If the actual bearing temperature difference is less than the second bearing temperature difference, the obstruction of fan blade rotation is determined as the fault type of the fan.

5. The method according to any one of claims 1 to 4, characterized in that, Also includes: If the actual motor temperature difference is equal to the preset second motor temperature difference, the fan is identified as faulty.

6. The method according to claim 1, characterized in that, When the actual motor temperature difference equals the preset second motor temperature difference, it also includes: Determining the fault of the fan motor is to determine the fault type of the fan.

7. A device for detecting wind turbine faults, comprising a processor and a memory storing program instructions, characterized in that, The processor is configured to, when executing the program instructions, perform the method for detecting wind turbine faults as described in any one of claims 1 to 6.

8. An air conditioner, characterized in that, include: Air conditioner body; The device for detecting fan malfunctions as described in claim 7 is installed on the air conditioner body.

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