Method and device for detecting fan fault and air conditioner

Abstract

The invention relates to the technical field of air conditioners, and discloses a fan fault detection method which comprises the steps that the bearing temperature of a fan bearing, the bearing environment temperature of the fan bearing, the motor temperature of a fan motor and the motor environment temperature of the fan motor are obtained; acquiring an actual bearing temperature difference according to the bearing temperature and the bearing environment temperature; and acquiring an actual motor temperature difference according to the motor temperature and the motor environment temperature. And determining whether the fan breaks down according to the actual bearing temperature difference and the actual motor temperature difference. Therefore, whether the fan breaks down or not can be determined in time according to the actual bearing temperature difference and the actual motor temperature difference after the fan breaks down. Therefore, the timeliness of fan fault detection is improved. The invention further discloses a device for detecting the fan fault and the air conditioner.

Description

Technical Field

[0001] The present application relates to the technical field of air conditioners, for example, to a method and device for detecting fan failure, and an air conditioner. Background Art

[0002] At present, air conditioners have become an indispensable household appliance in people's daily life. Among them, the fan is an indispensable and important component of the air conditioner. The fan is used to blow cold air or hot air into the room to achieve indoor temperature control. The fan in the air conditioner is usually composed of fan blades, a motor and a fan bearing, wherein the motor and the fan bearing are respectively located at both ends of the fan blade. The rotating motor drives the fan blade to rotate to achieve blowing. The fan bearing is used to reduce the friction coefficient during the rotation of the fan blade and ensure the rotation accuracy of the fan blade so that the fan blade can rotate stably and continuously. However, during the use of the fan, the fan will fail to rotate or the rotation is blocked. After a period of time after the fan fails, the temperature of the inner coil of the air conditioner will be too high or too low. If the temperature of the inner coil is too low, it will be frozen. If the temperature of the inner coil is too high, it will trigger the inner coil protection of the air conditioner, causing the air conditioner to shut down. It can be seen that the failure of the fan will not only reduce the efficiency of indoor temperature control, but also damage various components of the air conditioner, resulting in a shorter service life of the air conditioner. In the related art, it is usually determined whether the fan fails by whether the temperature of the inner coil is within a preset range. If the temperature of the inner coil is within the preset range, it is determined that the fan has not failed. If the temperature of the inner coil is not within the preset range, it is determined that the fan has failed.

[0003] In the process of implementing the embodiments of the present disclosure, it is found that there are at least the following problems in the related art: the temperature of the inner coil will change significantly after a period of time after the fan fails, so that the temperature of the inner coil is not within the preset range. In the related art, whether the fan fails is determined by whether the temperature of the inner coil is within the preset range. The timeliness is low.

[0004] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present application, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0005] In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an extensive review, nor is it intended to identify key / critical components or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

[0006] The embodiments of the present disclosure provide a method and device for detecting fan failure, and an air conditioner, so as to improve the timeliness of detecting fan failure.

[0007] In some embodiments, the method for detecting a fan failure includes: obtaining a bearing temperature of a fan bearing, a bearing environment temperature of the fan bearing, a motor temperature of a fan motor, and a motor environment temperature of the fan motor. Obtaining an actual bearing temperature difference based on the bearing temperature and the bearing environment temperature; obtaining an actual motor temperature difference based on the motor temperature and the motor environment temperature. Determining whether the fan fails based on the actual bearing temperature difference and the actual motor temperature difference.

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

[0010] In some embodiments, determining whether the fan is faulty according to the first motor temperature difference, the actual bearing temperature difference and the actual motor temperature difference includes: obtaining a second bearing temperature difference 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 not equal to the second bearing temperature difference, the fan is determined to be faulty.

[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, it also includes: determining the fan motor idling as determining the fault type of the fan.

[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 that the fan bearing is blocked from rotating as the fault type of the fan. And / or, if the actual bearing temperature difference is less than the second bearing temperature difference, determining that the fan blade is blocked from rotating as the fault type of the fan.

[0013] In some embodiments, the method for detecting a fan failure further includes: determining that the fan has failed 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 a fan motor fault as determining a fan fault type.

[0015] In some embodiments, the device for detecting a fan failure includes a processor and a memory storing program instructions, and the processor is configured to execute the above-mentioned method for detecting a fan failure when running the program instructions.

[0016] In some embodiments, the air conditioner comprises: an air conditioner body. The above-mentioned device for detecting fan failure is installed in the air conditioner body.

[0017] The method and device for detecting fan failure and the air conditioner provided by the embodiment of the present disclosure can achieve the following technical effects: by obtaining the bearing temperature of the fan bearing, the bearing environment temperature of the fan bearing, the motor temperature of the fan motor and the motor environment temperature of the fan motor. Then, the actual bearing temperature difference is obtained according to the bearing temperature and the bearing environment temperature, and the actual motor temperature difference is obtained according to the motor temperature and the motor environment temperature. And it is determined whether the fan is faulty according to the actual bearing temperature difference and the actual motor temperature difference. In this way, the fan failure will cause the bearing temperature of the fan bearing and the motor temperature of the fan motor to change in the first time, thereby causing the actual bearing temperature difference obtained according to the bearing temperature and the bearing environment temperature and the actual motor temperature difference obtained according to the motor temperature and the motor environment temperature to change. Compared with a period of time after the fan fails, whether the air conditioner fails is determined by whether the temperature of the inner coil is within a preset range. This solution determines whether the fan fails by the actual bearing temperature difference obtained according to the bearing temperature and the bearing environment temperature and the actual motor temperature difference obtained according to the motor temperature and the motor environment temperature. It can determine whether the fan fails in time according to the actual bearing temperature difference and the actual motor temperature difference after the fan fails. Thereby improving the timeliness of detecting fan failure.

[0018] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] One or more embodiments are exemplarily described by corresponding drawings, which do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements, and the drawings do not constitute a scale limitation, and wherein:

[0020] Figure 1 is a schematic diagram of a method for detecting a fan failure provided by an embodiment of the present disclosure;

[0021] Figure 2 is a schematic diagram of another method for detecting a fan failure provided by an embodiment of the present disclosure;

[0022] Figure 3 is a schematic diagram of another method for detecting a fan failure provided by an embodiment of the present disclosure;

[0023] Figure 4 is a schematic diagram of another method for detecting a fan failure provided by an embodiment of the present disclosure;

[0024] Figure 5 is a schematic diagram of a device for detecting fan failure provided by an embodiment of the present disclosure;

[0025] Figure 6 It is a schematic diagram of an air conditioner provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0026] In order to be able to understand the features and technical contents of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0027] The terms "first", "second", etc. in the specification and claims of the embodiments of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate, so that the embodiments of the embodiments of the present disclosure described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

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

[0029] In the embodiment of the present disclosure, the character " / " indicates that the preceding and following objects are in an "or" relationship. For example, A / B indicates: A or B.

[0030] The term "and / or" is a description of the association relationship 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" may refer to an association relationship or a binding relationship. The correspondence between A and B means that there is an association relationship or a binding relationship between A and B.

[0032] The method for detecting fan failure provided by the embodiment of the present disclosure is applied to an air conditioner. The air conditioner obtains the bearing temperature of the fan bearing, the bearing environment temperature of the fan bearing, the motor temperature of the fan motor, and the motor environment temperature of the fan motor. The actual bearing temperature difference is obtained according to the bearing temperature and the bearing environment temperature; the actual motor temperature difference is obtained according to the motor temperature and the motor environment temperature. Then, it is determined whether the fan is faulty based on the actual bearing temperature difference and the actual motor temperature difference. . In this way, compared with determining whether the air conditioner is faulty by whether the temperature of the inner coil is within a preset range after a period of time after the fan fails, this solution determines whether the fan is faulty by obtaining the actual bearing temperature difference based on the bearing temperature and the bearing environment temperature and the actual motor temperature difference based on the motor temperature and the motor environment temperature. It is possible to determine whether the fan is faulty based on the actual bearing temperature difference and the actual motor temperature difference in a timely manner after the fan fails. Thereby, the timeliness of detecting fan failures is improved.

[0033] The fan is an internal fan of the air conditioner, that is, a fan of an indoor unit of the air conditioner.

[0034] Furthermore, the air conditioner also includes a bearing temperature sensor, a bearing environment temperature sensor, a motor temperature sensor and a motor environment temperature sensor. Among them, the bearing environment temperature sensor and the bearing temperature sensor are both arranged on the fan bearing. The bearing temperature sensor is used to detect the real-time temperature of the surface of the fan bearing. The bearing environment temperature sensor and the bearing temperature sensor are 3 cm apart, and are used to detect the real-time temperature of the environment in which the fan bearing is located. The motor environment temperature sensor and the motor temperature sensor are both arranged on the motor. The motor temperature sensor is used to detect the real-time temperature of the surface of the fan motor. The motor environment temperature sensor and the motor temperature sensor are 3 cm apart, and are used to detect the real-time temperature of the environment in which the fan motor is located. In this way, since the bearing environment temperature sensor and the bearing temperature sensor are 3 cm apart, the influence of the temperature of the fan bearing on the temperature of the environment in which the fan bearing is located can be reduced. The motor environment temperature sensor and the motor temperature sensor are 3 cm apart, and the influence of the temperature of the fan motor on the temperature of the environment in which the fan motor is located can be reduced.

[0035] Combination Figure 1 As shown, the embodiment of the present disclosure provides a method for detecting a fan failure, comprising:

[0036] In step S101, the air conditioner obtains a bearing temperature of a fan bearing, a bearing environment temperature of the fan bearing, a motor temperature of a fan motor, and a motor environment temperature of the fan motor.

[0037] Step S102: the air conditioner obtains an actual bearing temperature difference according to the bearing temperature and the bearing environment temperature, and obtains an actual motor temperature difference according to the motor temperature and the motor environment temperature.

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

[0039] The method for detecting fan failure provided by the embodiment of the present disclosure is adopted, by obtaining the bearing temperature of the fan bearing, the bearing environment temperature of the fan bearing, the motor temperature of the fan motor, and the motor environment temperature of the fan motor. Then, the actual bearing temperature difference is obtained according to the bearing temperature and the bearing environment temperature, and the actual motor temperature difference is obtained according to the motor temperature and the motor environment temperature. And it is determined whether the fan fails according to the actual bearing temperature difference and the actual motor temperature difference. In this way, the fan failure will cause the bearing temperature of the fan bearing and the motor temperature of the fan motor to change at the first time, thereby causing the actual bearing temperature difference obtained according to the bearing temperature and the bearing environment temperature and the actual motor temperature difference obtained according to the motor temperature and the motor environment temperature to change. Compared with determining whether the air conditioner fails by whether the temperature of the inner coil is within a preset range after a period of time after the fan fails, this solution determines whether the fan fails by the actual bearing temperature difference obtained according to the bearing temperature and the bearing environment temperature and the actual motor temperature difference obtained according to the motor temperature and the motor environment temperature. It can be determined whether the fan fails in time according to the actual bearing temperature difference and the actual motor temperature difference after the fan fails. Thereby improving the timeliness of detecting fan failure.

[0040] Further, the air conditioner obtains the bearing temperature of the fan bearing, including: the air conditioner obtains the real-time temperature of the surface of the fan bearing detected by the bearing temperature sensor, and the air conditioner determines the real-time temperature of the surface of the fan bearing as the bearing temperature of the fan bearing.

[0041] Further, the air conditioner obtains the bearing environment temperature of the fan bearing, including: the air conditioner obtains the real-time temperature of the environment where the fan bearing is located detected by the bearing environment temperature sensor. The air conditioner determines the real-time temperature of the environment where the fan bearing is located as the bearing environment temperature of the fan bearing.

[0042] Furthermore, the air conditioner obtains the fan motor temperature of the fan motor, including: the air conditioner obtains the real-time temperature of the surface of the fan motor detected by the motor temperature sensor, and the air conditioner determines the real-time temperature of the surface of the fan motor as the fan motor temperature of the fan motor.

[0043] Further, the air conditioner obtains the fan motor ambient temperature of the fan motor, including: the air conditioner obtains 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 fan motor ambient temperature of the fan motor.

[0044] In this way, the real-time temperature of the surface of the fan bearing is determined as the bearing temperature of the fan bearing, the real-time temperature of the environment where the fan bearing is located is determined as the bearing environment temperature of the fan bearing, the real-time temperature of the surface of the fan motor is determined as the fan motor temperature of the fan motor, and the real-time temperature of the environment where the fan motor is located is determined as the fan motor environment temperature of the fan motor. In order to obtain the real-time actual bearing temperature difference between the bearing temperature and the bearing environment temperature and the real-time actual motor temperature difference between the motor temperature and the motor environment temperature, and to determine whether the fan is faulty in real time, thereby improving the real-time performance of detecting fan faults.

[0045] Further, the air conditioner obtains the actual bearing temperature difference according to 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 according to the motor temperature and the motor environment temperature, including: the air conditioner determines the difference between the motor temperature and the motor environment temperature as the actual motor temperature difference.

[0047] In some embodiments, the actual bearing temperature difference represents the heat generated by the bearing rotation. The larger the actual bearing temperature difference, the more heat generated by the bearing rotation. The smaller the actual bearing temperature difference, the less heat generated by the bearing rotation. The actual motor temperature difference represents the heat generated by the motor rotation. The larger the actual motor temperature difference, the more heat generated by the motor rotation. The smaller the actual motor temperature difference, the less heat generated by the motor rotation.

[0048] Optionally, the air conditioner determines whether the fan is faulty according to the actual bearing temperature difference and the actual motor temperature difference, including: the air conditioner obtains the set speed of the fan. The air conditioner obtains the first motor temperature difference corresponding to the set speed. The air conditioner determines whether the fan is faulty according to the first motor temperature difference, the actual bearing temperature difference and the actual motor temperature difference. In this way, after the fan fails, it can be accurately judged whether the fan is faulty according to 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 there is no fault.

[0050] Further, the air conditioner obtains the first motor temperature difference corresponding to the set speed, including: the air conditioner uses a preset motor temperature difference database to perform a table lookup operation to obtain the first motor temperature difference corresponding to the set speed. The preset motor temperature difference database stores the corresponding relationship between the set speed and the first motor temperature difference. The corresponding relationship between the set speed and the first motor temperature difference is obtained by testing in a laboratory.

[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 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. And / or, the air conditioner obtains the second bearing temperature difference corresponding to the set speed. 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, it is determined that the fan is not faulty.

[0052] The preset second motor temperature difference is 0. The preset first bearing temperature difference 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, including: the air conditioner determines that the fan is faulty 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. In this way, the fan fault can be determined in a timely manner 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, 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: the air conditioner determines that the fan motor is idling as determining the fault type of the fan. In this way, the fault type of the fan can be determined, so that the user can perform maintenance according to the fault type.

[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 and the actual motor temperature difference is less than the first motor temperature difference, which shows that the motor is rotating. The actual bearing temperature difference is equal to the preset first bearing temperature difference, that is, the actual bearing temperature difference is 0. That is, the bearing temperature of the fan bearing and the bearing ambient temperature of the fan bearing are equal. Therefore, the heat generated when the fan bearing rotates is 0. Then the fan bearing does not rotate. That is, the fan blades do not rotate. The motor rotates, but the fan blades do not rotate, that is, the connection between the fan blades and the motor is disconnected, causing the motor to idle. Therefore, the fault type of the fan is fan motor idling.

[0056] Combination Figure 2 As shown, the embodiment of the present disclosure provides another method for detecting a fan failure, comprising:

[0057] In step S201, the air conditioner obtains a bearing temperature of a fan bearing, a bearing environment temperature of the fan bearing, a motor temperature of a fan motor, and a motor environment temperature of the fan motor.

[0058] Step S202: the air conditioner obtains an actual bearing temperature difference according to the bearing temperature and the bearing environment temperature, and obtains an actual motor temperature difference according to the motor temperature and the motor environment temperature.

[0059] In step S203, the air conditioner determines that the fan is faulty 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.

[0060] In step S204, the air conditioner determines that the fan motor is idling as the fault type of the fan.

[0061] The method for detecting fan fault provided by the embodiment of the present disclosure is adopted, by obtaining the bearing temperature of the fan bearing, the bearing environment temperature of the fan bearing, the motor temperature of the fan motor and the motor environment temperature of the fan motor. Then, the actual bearing temperature difference is obtained according to the bearing temperature and the bearing environment temperature, and the actual motor temperature difference is obtained according to the motor temperature and the motor environment temperature. And when the actual motor temperature difference of the air conditioner 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 fan fault is determined. The fan motor idling is determined as the fault type of the fan. In this way, when the fan has a fan motor idling type fault, the fan fault can be determined in time 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, and the fault type is accurately determined. Thereby, the accuracy and timeliness of the fan fault detection are improved, and the user is convenient to perform maintenance on the fault type of the fan motor idling.

[0062] Optionally, the air conditioner determines whether the fan is faulty according to the first motor temperature difference, the actual bearing temperature difference and the actual motor temperature difference, including: the air conditioner obtains the second bearing temperature difference corresponding to the set speed. The air conditioner determines that the fan is faulty 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. In this way, the fan fault can be determined in time 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] Further, the air conditioner obtains the second bearing temperature difference corresponding to the set speed, including: the air conditioner uses a preset bearing temperature difference database to perform a table lookup operation to obtain the second bearing temperature difference corresponding to the set speed. The preset bearing temperature difference database stores the corresponding relationship between the set speed and the second bearing temperature difference. The corresponding relationship 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 of the air conditioner 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 further includes: if the actual bearing temperature difference of the air conditioner is greater than the second bearing temperature difference, the fan bearing rotation is determined to be blocked 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 fan blade rotation is determined to be blocked as the fault type of the fan. In this way, when the actual bearing temperature difference is greater than the second bearing temperature difference, it can be determined that the fault type of the fan is blocked fan bearing rotation. When the actual bearing temperature difference is less than the second bearing temperature difference, it is determined that the fault type of the fan is blocked fan blade rotation. So that users can perform maintenance on the fault types of blocked fan bearing rotation or blocked fan blade rotation.

[0065] In some embodiments, the actual motor temperature difference is greater than the first motor temperature difference, indicating that the frictional heat generated when the motor rotates is large, that is, the motor rotates faster and the load is large. If the actual bearing temperature difference is greater than the second bearing temperature difference, it indicates that the actual bearing temperature difference is too large, and when the bearing rotates, the friction with the fan blade is too large. Therefore, the bearing rotation is hindered.

[0066] In some embodiments, the actual motor temperature difference is greater than the first motor temperature difference, indicating that the frictional heat generated when the motor rotates is large, that is, the motor rotates faster and the load is large. If the actual bearing temperature difference is less than the second bearing temperature difference, it indicates that the actual bearing temperature difference is small, that is, when the bearing rotates, the friction force with the fan blade is large. Then the bearing rotates slowly. That is, the fan blade rotates slowly. Therefore, the rotation of the fan blade is hindered.

[0067] Combination Figure 3 As shown, the embodiment of the present disclosure provides another method for detecting a fan failure, comprising:

[0068] In step S301, the air conditioner obtains a bearing temperature of a fan bearing, a bearing environment temperature of the fan bearing, a motor temperature of a fan motor, and a motor environment temperature of the fan motor.

[0069] Step S302: the air conditioner obtains an actual bearing temperature difference according to the bearing temperature and the bearing environment temperature, and obtains an actual motor temperature difference according to the motor temperature and the motor environment temperature.

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

[0071] Step S304: the air conditioner determines that the fan is faulty 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.

[0072] Step S305: if the actual bearing temperature difference of the air conditioner is greater than the second bearing temperature difference, the fan bearing rotation is blocked 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 fan blade rotation is blocked as the fault type of the fan.

[0073] The method for detecting fan fault provided by the embodiment of the present disclosure is adopted, by obtaining the bearing temperature of the fan bearing, the bearing environment temperature of the fan bearing, the motor temperature of the fan motor and the motor environment temperature of the fan motor. Then, the actual bearing temperature difference is obtained according to the bearing temperature and the bearing environment temperature, and the actual motor temperature difference is obtained according to the motor temperature and the motor environment temperature. The second bearing temperature difference corresponding to the set speed is obtained, and the fan fault is determined 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. If the actual bearing temperature difference is greater than the second bearing temperature difference, the fan bearing rotation is blocked as the fault type of the fan. If the actual bearing temperature difference is less than the second bearing temperature difference, the fan blade rotation is blocked as the fault type of the fan. In this way, the fan fault is determined 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. The fan fault can be determined in time. And when the actual bearing temperature difference is greater than the second bearing temperature difference, the fault type of the fan is accurately determined as the fan bearing rotation is blocked. When the actual bearing temperature difference is less than the second bearing temperature difference, the fault type of the fan is accurately determined to be the fan blade rotation obstruction, thereby improving the accuracy and timeliness of the fan fault detection, and facilitating the user to perform maintenance on the fan bearing rotation obstruction or fan blade rotation obstruction fault type.

[0074] Optionally, the method for detecting fan failure further includes: the air conditioner determines that the fan has failed when the actual motor temperature difference is equal to a preset second motor temperature difference. In this way, the fan failure can be determined in a timely manner when the actual motor temperature difference is equal to the preset second motor temperature difference, thereby improving the accuracy and timeliness of fan failure detection.

[0075] Furthermore, when the actual motor temperature difference is equal to the preset second motor temperature difference, the air conditioner further includes: the air conditioner determines the fan motor fault as the fan fault type. In this way, the fan fault type can be accurately determined as the fan motor fault, so that the user can perform maintenance according to the fault type.

[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, that is, the actual motor temperature difference is 0. That is, the motor temperature of the fan motor is equal to the motor ambient temperature of the fan motor. Therefore, the heat generated when the fan motor rotates is 0. Then the fan motor does not rotate. Therefore, the fault type of the fan is a fan motor fault.

[0077] Furthermore, the method for detecting fan failure also includes: when the fan failure is determined, sending the fan failure type to the user terminal to remind the user to repair the fan. In this way, the user can perform targeted repairs according to the fan failure type when the fan fails.

[0078] Combination Figure 4 As shown, the embodiment of the present disclosure provides another method for detecting a fan failure, comprising:

[0079] In step S401, the air conditioner obtains a bearing temperature of a fan bearing, a bearing environment temperature of the fan bearing, a motor temperature of a fan motor, and a motor environment temperature of the fan motor.

[0080] Step S402: the air conditioner obtains an actual bearing temperature difference according to the bearing temperature and the bearing ambient temperature; and obtains an actual motor temperature difference according to the motor temperature and the motor ambient temperature.

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

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

[0083] Step S405: the air conditioner determines that the fan is faulty 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, and determines that the fan motor is idling as the fault type of the fan.

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

[0085] Step S407: the air conditioner determines that the fan is faulty 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.

[0086] Step S408: If the actual bearing temperature difference is greater than the second bearing temperature difference, the air conditioner determines that the fan bearing rotation is blocked 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 that the fan blade rotation is blocked as the fault type of the fan.

[0088] Step S410: the air conditioner determines that the fan is faulty when the actual motor temperature difference is equal to the preset second motor temperature difference, and determines the fan motor fault as the fault type of the fan.

[0089] In step S411, the air conditioner determines that the fan is not faulty 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 greater than the preset first bearing temperature difference.

[0090] Step S412, the air conditioner obtains a second bearing temperature difference corresponding to the set speed. 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, it is determined that the fan is not faulty.

[0091] The method for detecting fan faults provided by the embodiment of the present disclosure is adopted, by obtaining the bearing temperature of the fan bearing, the bearing environment temperature of the fan bearing, the motor temperature of the fan motor, and the motor environment temperature of the fan motor. Then, the actual bearing temperature difference is obtained according to the bearing temperature and the bearing environment temperature, and the actual motor temperature difference is obtained according to the motor temperature and the motor environment temperature. Then, it is determined whether the motor is faulty according to one or more of the actual motor temperature difference, the actual bearing temperature difference, the first motor temperature difference corresponding to the set speed, and the second bearing temperature difference corresponding to the set speed, and in the case of a motor fault, the fault type of the motor is determined. Thereby, the accuracy and timeliness of the fan fault detection can be improved, and it is convenient for users to perform maintenance on the fault type of the fan motor idling.

[0092] Combination Figure 5 As shown, an embodiment of the present disclosure provides a device 1 for detecting a fan failure, including a processor 100 and a memory 101. Optionally, the device may also include a communication interface 102 and a bus 103. The processor 100, the communication interface 102, and the memory 101 may communicate with each other through the bus 103. The communication interface 102 may be used for information transmission. The processor 100 may call the logic instructions in the memory 101 to execute the method for detecting a fan failure of the above embodiment.

[0093] In addition, the logic instructions in the memory 101 described above may be implemented in the form of software functional units and when sold or used as independent products, may be stored in a computer-readable storage medium.

[0094] The memory 101 is a computer-readable storage medium that can be used to store software programs and computer executable programs, such as program instructions / modules corresponding to the method in the embodiment of the present disclosure. The processor 100 executes the function application and data processing by running the program instructions / modules stored in the memory 101, that is, the method for detecting fan faults in the above embodiment is implemented.

[0095] The memory 101 may include a program storage area and a data storage area, wherein the program storage area may store an operating system and an application required for at least one function; the data storage area may store data created according to the use of the terminal device, etc. In addition, the memory 101 may include a high-speed random access memory and may also include a non-volatile memory.

[0096] The device for detecting fan failure provided by the embodiment of the present disclosure is adopted, by obtaining the bearing temperature of the fan bearing, the bearing environment temperature of the fan bearing, the motor temperature of the fan motor, and the motor environment temperature of the fan motor. Then, the actual bearing temperature difference is obtained according to the bearing temperature and the bearing environment temperature, and the actual motor temperature difference is obtained according to the motor temperature and the motor environment temperature. And it is determined whether the fan fails according to the actual bearing temperature difference and the actual motor temperature difference. In this way, the fan failure will cause the bearing temperature of the fan bearing and the motor temperature of the fan motor to change in the first time, thereby causing the actual bearing temperature difference obtained according to the bearing temperature and the bearing environment temperature and the actual motor temperature difference obtained according to the motor temperature and the motor environment temperature to change. Compared with determining whether the air conditioner fails by whether the temperature of the inner coil is within a preset range after a period of time after the fan fails, this solution determines whether the fan fails by the actual bearing temperature difference obtained according to the bearing temperature and the bearing environment temperature and the actual motor temperature difference obtained according to the motor temperature and the motor environment temperature. It can determine whether the fan fails in time according to the actual bearing temperature difference and the actual motor temperature difference after the fan fails. Thereby improving the timeliness of detecting fan failure.

[0097] Combination Figure 6 As shown, an embodiment of the present disclosure provides an air conditioner 2, comprising: an air conditioner body, and the above-mentioned device 1 for detecting fan failure. The device 1 for detecting fan failure is installed on the air conditioner body. The installation relationship described here 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, etc. Those skilled in the art can understand that the device 1 for detecting fan failure can be adapted to a feasible air conditioner body, thereby realizing other feasible embodiments.

[0098] The air conditioner provided by the embodiment of the present disclosure is adopted, by obtaining the bearing temperature of the fan bearing, the bearing environment temperature of the fan bearing, the motor temperature of the fan motor, and the motor environment temperature of the fan motor. Then, the actual bearing temperature difference is obtained according to the bearing temperature and the bearing environment temperature, and the actual motor temperature difference is obtained according to the motor temperature and the motor environment temperature. And it is determined whether the fan fails according to the actual bearing temperature difference and the actual motor temperature difference. In this way, the fan failure will cause the bearing temperature of the fan bearing and the motor temperature of the fan motor to change in the first time, thereby causing the actual bearing temperature difference obtained according to the bearing temperature and the bearing environment temperature and the actual motor temperature difference obtained according to the motor temperature and the motor environment temperature to change. Compared with determining whether the air conditioner fails by whether the temperature of the inner coil is within a preset range after a period of time after the fan fails, this solution determines whether the fan fails by the actual bearing temperature difference obtained according to the bearing temperature and the bearing environment temperature and the actual motor temperature difference obtained according to the motor temperature and the motor environment temperature. It can determine whether the fan fails in time according to the actual bearing temperature difference and the actual motor temperature difference after the fan fails. Thereby improving the timeliness of detecting fan failure.

[0099] An embodiment of the present disclosure provides a computer-readable storage medium storing computer-executable instructions, wherein the computer-executable instructions are configured to execute the above-mentioned method for detecting a fan failure.

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

[0101] The technical solution of the embodiment of the present disclosure can be embodied in the form of a software product, which is stored in a storage medium and includes one or more instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in the embodiment of the present disclosure. The aforementioned storage medium may be a non-transient storage medium, including: a USB flash drive, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a disk or an optical disk, and other media that can store program codes, or a transient storage medium.

[0102] The above description and the accompanying drawings fully illustrate the embodiments of the present disclosure so that those skilled in the art can practice them. Other embodiments may include structural, logical, electrical, process and other changes. The embodiments represent only possible changes. Unless explicitly required, separate components and functions are optional, and the order of operation may vary. The parts and features of some embodiments may be included in or replace the parts and features of other embodiments. Moreover, the words used in this application are only used to describe the embodiments and are not used to limit the claims. As used in the description of the embodiments and the claims, unless the context clearly indicates, the singular forms of "a", "an" and "the" are intended to include plural forms as well. Similarly, the term "and / or" as used in this application refers to any and all possible combinations of listings containing one or more associated ones. In addition, when used in the present application, the term "comprise" and its variants "comprises" and / or comprising refer to the presence of stated features, wholes, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or groups thereof. In the absence of further restrictions, the elements defined by the sentence "comprising a ..." do not exclude the presence of other identical elements in the process, method or device comprising the elements. In this article, each embodiment may focus on the differences from other embodiments, and the same and similar parts between the various embodiments may refer to each other. For the methods, products, etc. disclosed in the embodiments, if they correspond to the method part disclosed in the embodiments, then the relevant parts can refer to the description of the method part.

[0103] Those skilled in the art will appreciate that the units and algorithm steps of each example 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 performed in hardware or software may depend on the specific application and design constraints of the technical solution. The technicians may use different methods for each specific application to implement the described functions, but such implementations should not be considered to exceed the scope of the embodiments of the present disclosure. The technicians may clearly understand that, for the convenience and simplicity of description, the specific working processes of the systems, devices and units described above may refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here.

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

[0105] The flowchart and block diagram in the accompanying drawings show the possible architecture, function and operation of the system, method and computer program product according to the embodiment of the present disclosure. In this regard, each box in the flowchart or block diagram can represent a module, a program segment or a part of the code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. In some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, which can depend on the functions involved. In the description corresponding to the flowchart and the block diagram in the accompanying drawings, the operations or steps corresponding to different boxes can also occur in a different order from the order disclosed in the description, and sometimes there is no specific order between different operations or steps. For example, two consecutive operations or steps can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, which can depend on the functions involved. Each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, may be implemented by a dedicated hardware-based system that performs the specified functions or actions, or may be implemented by a combination of dedicated hardware and computer instructions.

Claims

1. A method for detecting fan failure, characterized in that: include: Obtain 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; 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 whether the fan is faulty based on the actual bearing temperature difference and the actual motor temperature difference.

2. The method according to claim 1, characterized in that Determine whether the fan is faulty based on the actual bearing temperature difference and the actual motor temperature difference, including: Get the set speed of the fan; Obtaining a first motor temperature difference corresponding to a set speed; Determine whether the fan is faulty based on the first motor temperature difference, the actual bearing temperature difference and the actual motor temperature difference.

3. The method according to claim 2, characterized in that Determining whether the fan is faulty according to the first motor temperature difference, the actual bearing temperature difference and the actual motor temperature difference includes: 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, a fan failure is determined.

4. The method according to claim 2, characterized in that: Determining whether the fan is faulty according to the first motor temperature difference, the actual bearing temperature difference and the actual motor temperature difference includes: Obtaining a second bearing temperature difference corresponding to a set speed; 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, a fan failure is determined.

5. The method according to claim 3, 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 method further includes: The fan motor idling is determined as the fault type of the fan.

6. The method according to claim 4, characterized in that In the case 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 method further includes: If the actual bearing temperature difference is greater than the second bearing temperature difference, the fan bearing rotation obstruction 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 fan blade rotation obstruction is determined as the fault type of the fan.

7. The method according to any one of claims 1 to 6, characterized in that: Also includes: When the actual motor temperature difference is equal to the preset second motor temperature difference, a fan failure is determined.

8. The method according to claim 3, characterized in that When the actual motor temperature difference is equal to the preset second motor temperature difference, the method further includes: The fan motor fault is determined to determine the fault type of the fan.

9. A device for detecting fan failure, comprising a processor and a memory storing program instructions, characterized in that: The processor is configured to execute the method for detecting wind turbine failure according to any one of claims 1 to 8 when running the program instructions.

10. An air conditioner, characterized in that: include: Air conditioner body; The device for detecting fan failure as claimed in claim 9 is installed on the air conditioner body.

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