Fault detection method and device for outdoor unit, air conditioner, and storage medium

Abstract

The present application relates to the technical field of air conditioners, and discloses a fault detection method for an outdoor unit, wherein the outdoor unit includes a radiator and an outdoor fan, wherein the radiator is located at the air outlet side of the outdoor fan, and the radiator is provided with a rotor for detecting the wind speed of the outdoor fan, and the method includes: obtaining a speed value of the rotor; and determining the fault state of the outdoor fan according to the speed value. The method can improve the accuracy of outdoor fan fault judgment. The present application also discloses a fault detection device for an outdoor unit, an air conditioner, and a storage medium.

Description

Technical Field

[0001] The present application relates to the technical field of air conditioners, for example, to a fault detection method and device for an outdoor unit, an air conditioner, and a storage medium. Background Art

[0002] At present, when the air conditioner is running in heating mode for a long time in winter, there is a certain fault, that is, the compressor, four-way valve, electronic expansion valve, indoor and outdoor heat exchanger and indoor fan are all running normally but the outdoor fan stops. At this time, although the indoor unit can blow out hot air, the heating effect is poor.

[0003] If the outdoor temperature is low and the humidity is high, the load of the outdoor fan exceeds the safety threshold due to heat or the size of the outdoor fan, etc., and the following situation is likely to occur after the outdoor heat exchanger is defrosted: When the current threshold and back electromotive force threshold of the outdoor fan are set unreasonably, if the outdoor fan starts, the air conditioner system has detected the current value and back electromotive force of the outdoor fan, and will no longer control the start of the outdoor fan through the starting current, but only maintain the state of the outdoor fan. That is, when the current threshold and back electromotive force threshold of the outdoor fan are set unreasonably, the air conditioner system detects that the outdoor fan has reached the set speed value for the first time and does not execute the control program to drive the outdoor fan to start.

[0004] 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:

[0005] The method of receiving the electrical signal associated with the rotation speed of the outdoor fan by the computer board cannot accurately identify whether the outdoor fan has stopped rotating, and cannot identify the cause of the poor indoor heating effect. Therefore, how to accurately identify the fault of the outdoor fan during operation has become a technical problem that needs to be solved urgently. Summary of the invention

[0006] 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.

[0007] The embodiments of the present disclosure provide a fault detection method and device for an outdoor unit, an air conditioner, and a storage medium to improve the accuracy of outdoor fan fault judgment.

[0008] In some embodiments, the outdoor unit includes a radiator and an outdoor fan, the radiator is located on the air outlet side of the outdoor fan, the radiator is configured with a rotor for detecting the wind speed of the outdoor fan, and the method includes: obtaining the speed value of the rotor; and determining the fault state of the outdoor fan based on the speed value.

[0009] In some embodiments, the device includes: a processor and a memory storing program instructions, and the processor is configured to execute the aforementioned fault detection method for an outdoor unit when running the program instructions.

[0010] In some embodiments, the air conditioner includes an outdoor unit, the outdoor unit includes a radiator and an outdoor fan, the radiator is located on the air outlet side of the outdoor fan, and the radiator is configured with a rotor for detecting the wind speed of the outdoor fan; and, a fault detection device for the outdoor unit as described above.

[0011] In some embodiments, the storage medium stores program instructions, and when the program instructions are run, the fault detection method for an outdoor unit as described above is executed.

[0012] The fault detection method and device for an outdoor unit, the air conditioner, and the storage medium provided in the embodiments of the present disclosure can achieve the following technical effects:

[0013] When the outdoor fan is running, the airflow it generates exchanges heat with the radiator and then flows through the location of the rotor. When the outdoor fan stops running, if the components other than the outdoor fan do not generate airflow, the rotor remains stationary. That is, the wind speed of the outdoor fan can be indirectly detected by the rotation speed value of the rotor. Therefore, the embodiment of the present disclosure can determine the fault state of the outdoor fan according to the rotation speed value of the rotor, thereby improving the accuracy of outdoor fan fault judgment.

[0014] 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

[0015] 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:

[0016] Figure 1 is a structural schematic diagram of an air-conditioning outdoor unit provided by an embodiment of the present disclosure;

[0017] Figure 2 is a schematic structural diagram of a radiator provided by an embodiment of the present disclosure;

[0018] Figure 3 is a structural schematic diagram of a radiator provided by an embodiment of the present disclosure from another perspective;

[0019] Figure 4 is a structural schematic diagram of a radiator provided by an embodiment of the present disclosure from another perspective;

[0020] Figure 5is a structural schematic diagram of a radiator provided by an embodiment of the present disclosure from another perspective;

[0021] Figure 6 is a schematic diagram of a fault detection method for an outdoor unit provided by an embodiment of the present disclosure;

[0022] Figure 7 is a schematic diagram of another fault detection method for an outdoor unit provided by an embodiment of the present disclosure;

[0023] Figure 8 is a schematic diagram of another fault detection method for an outdoor unit provided by an embodiment of the present disclosure;

[0024] Fig. 9 It is a schematic diagram of a fault detection device for an outdoor unit provided in an embodiment of the present disclosure.

[0025] Reference numerals:

[0026] 10: fin group; 101: fin; 102: Tesla valve channel; 103: air intake end;

[0027] 20: base; 201: heat absorbing surface; 202: heat dissipating surface;

[0028] 30: Outdoor fan;

[0029] 40: Rotor. DETAILED DESCRIPTION

[0030] 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.

[0031] 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.

[0032] Unless otherwise stated, the term "plurality" means two or more.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] Combination Figure 1 As shown, the embodiment of the present disclosure discloses an outdoor unit, including a radiator and an outdoor fan 30. The radiator is located at the air outlet side of the outdoor fan 30. The radiator is provided with a rotor 40 for detecting the wind speed of the outdoor fan 30. Since the radiator is located at the air outlet side of the outdoor fan, when the outdoor fan is running, the airflow generated by it flows through the gap between adjacent fins in the fin group, and the airflow exchanges heat with the fins and then flows out of the fin group along the Tesla valve channel.

[0037] The heat sink includes a fin group 10. The fin group 10 includes a plurality of fins 101 arranged in parallel, and the fin surfaces of some or all of the fins 101 are configured with Tesla valve channels 102 to allow the airflow passing through the fins 101 to flow in one direction. In this way, by providing the Tesla valve channel, the airflow after heat exchange flows in one direction and flows out of the fin group in time, thereby preventing the airflow after heat exchange from flowing back and draught.

[0038] Combination Figure 2 and Figure 3 As shown, the Tesla valve channel 102 is unidirectionally conductive, so that the hot air flow after heat exchange flows along the Tesla valve channel 102, so that the hot air flow cannot flow back, thereby ensuring that the air flow for heat exchange with the fins of the radiator is a relatively low temperature air flow, thereby improving the heat exchange efficiency and enhancing the heat dissipation effect.

[0039] Combination Figure 4 As shown, the Tesla valve channel 102 is a groove in the form of a Tesla valve on the wing surface of the fin. The Tesla valve is a one-way valve that does not require moving parts. The Tesla valve includes a main circuit and multiple loop branches. When the airflow moves from the first end to the second end, the airflow movement direction of the main circuit and the branch circuit at the junction with the main circuit is consistent, and the Tesla valve is in a conducting state. When the airflow moves from the second end to the first end, the airflow direction at the junction of the branch circuit and the main circuit is opposite to the moving direction of the airflow in the main circuit. The airflow in the branch circuit has a check effect on the airflow in the main circuit, and the Tesla valve is in a closed state. The Tesla valve can realize the one-way conduction function without moving parts. Therefore, the Tesla valve channel 102 is set on the fin 101 to realize the one-way flow of airflow.

[0040] Figure 5 Shows a top view of the heat sink. Figure 5 As shown, a rotor 40 is disposed in the Tesla valve channel 102. The air inlet end 103 of the Tesla valve channel 102 is located at the air outlet side of the outdoor fan 30. The airflow generated by the outdoor fan 30 passes through the fin group and flows out of the radiator through the one-way drainage of the Tesla valve channel 102. Among them, one or more rotors 40 can be disposed in the Tesla valve channel 102.

[0041] In this way, when the outdoor fan is running, the airflow it generates will inevitably flow through the position of the rotor after heat exchange with the fins. When the outdoor fan stops running, no airflow will be generated. Correspondingly, if the components other than the outdoor fan do not generate airflow, the rotor will remain stationary. In addition, the probability of backflow and wind trapping of the airflow generated by the outdoor fan after heat exchange through the radiator is extremely low. Therefore, by detecting the rotation speed of the rotor configured in the Tesla valve slot with a unidirectional conduction function, the reverse airflow generated by the components other than the outdoor fan and the airflow generated by the outdoor fan can be avoided from flowing through the Tesla valve slot, which is beneficial to improving the accuracy of wind speed detection of the outdoor fan.

[0042] Optionally, the rotor 40 includes a Magnus rotor. In this way, when the Magnus rotor is located in the wind field, it is very easy to collect the kinetic energy generated by the wind field. Since the Magnus rotor is located in the wind field generated by the outdoor fan when the outdoor fan is running, the embodiment of the present disclosure uses the Magnus rotor, and can quickly determine whether the outdoor fan generates a wind field by its rotation speed, thereby determining whether the outdoor fan is running, and effectively improving the efficiency of the wind speed detection of the outdoor fan on the basis of improving the accuracy of the wind speed detection of the outdoor fan.

[0043] Optionally, the Tesla valve channel 102 is extended along the length direction of the fin 101 , and the conducting direction is consistent with the flow direction of the airflow. The Tesla valve channel 102 is configured with one or more rotors 40 along the conducting direction.

[0044] Optionally, the radiator further comprises: a base 20. The base 20 comprises a heat absorbing surface 201 and a heat dissipating surface 202. The heat absorbing surface 201 is used to receive the heat generated by the heating element. The heat dissipating surface 202 is thermally connected to the fin group 10 so that the heat absorbed by the heat absorbing surface 201 is transferred to the fin group 10 through the heat dissipating surface 202. Among them, the base 20 is a plate-like structure with a certain thickness, the base 20 is a plate-like structure with a certain thickness, the heating element is thermally connected to the base 20, and in particular, the heat absorbing surface 201 of the base 20 is attached to ensure the heat transfer efficiency between the two. The heat absorbing surface 201 of the base 20 receives the heat generated by the heating element and transferred to the base 20, and the heat is accumulated in the base 20, while being transferred to the heat dissipating surface 202 of the base 20, and is transferred to the fin group 10 thermally connected to the heat dissipating surface 202. The heat exchange area with the surrounding air is expanded by the fin group 10, thereby expanding the heat dissipation area of ​​the radiator. Thereby, the heat dissipation efficiency of the radiator to the outdoor fan can be improved.

[0045] Based on the above outdoor unit structure, combined with Figure 6 As shown, the embodiment of the present disclosure provides a fault detection method for an outdoor unit, comprising:

[0046] S01 : The processor obtains the rotation speed value of the rotor 40 .

[0047] S02: The processor determines the fault state of the outdoor fan according to the rotation speed value.

[0048] Using the fault detection method for an outdoor unit provided by the embodiment of the present disclosure, when the outdoor fan is running, the airflow generated by it exchanges heat with the radiator and flows through the position of the rotor. When the outdoor fan stops running, if the components other than the outdoor fan do not generate airflow, the rotor remains stationary. That is, the wind speed of the outdoor fan can be indirectly detected by the rotation speed value of the rotor. Therefore, the embodiment of the present disclosure can determine the fault state of the outdoor fan according to the rotation speed value of the rotor, thereby improving the accuracy of outdoor fan fault judgment.

[0049] Optionally, combined Figure 7 As shown, the processor obtains the rotation speed value of the rotor, including:

[0050] S11, the processor obtains the current rotational speed values ​​of all rotors configured on the Tesla valve channel.

[0051] S12, the processor obtains a target speed value according to the current speed values ​​of all rotors.

[0052] S13: The processor determines the target speed value as the speed value.

[0053] This is helpful to improve the accuracy of speed recognition.

[0054] Optionally, the processor obtains a target speed value according to current speed values ​​of all rotors, including:

[0055] The average value of the current speed values ​​of all rotors is taken as the target speed value; or,

[0056] The maximum value of the current rotational speed values ​​of all rotors is taken as the target rotational speed value.

[0057] This is helpful to improve the accuracy of determining the target speed value.

[0058] Optionally, the processor determines the fault state of the outdoor unit according to the rotation speed value, including:

[0059] The processor determines that the outdoor fan is faulty when the rotation speed value is less than or equal to the rotation speed lower limit threshold.

[0060] The processor determines that the outdoor fan is operating normally when the rotation speed value is greater than the rotation speed lower limit threshold, wherein the rotation speed lower limit threshold corresponds to the minimum wind speed value of the outdoor fan.

[0061] In this way, when the speed value is less than or equal to the speed lower limit threshold, it indicates that the current speed value of the outdoor fan has not reached the speed lower limit threshold. It is determined that the outdoor fan is faulty. When the speed value is greater than the speed lower limit threshold, it indicates that the outdoor fan is operating normally. The disclosed embodiment compares the speed value determined by the rotor with the speed lower limit threshold, and can accurately identify whether the outdoor fan is faulty, thereby improving the accuracy of outdoor fan fault judgment.

[0062] Optionally, the processor obtains the rotation speed value of the rotor, including:

[0063] The processor obtains the operation mode of the air conditioner.

[0064] When the operation mode indicates heating mode operation or defrosting mode operation, the processor obtains the rotation speed value of the rotor.

[0065] In this way, after the air conditioner has been running in heating mode for a long time, the outdoor heat exchanger is very likely to frost. When the air conditioner is running in defrost mode, the surface of the outdoor heat exchanger is frosted and is in a defrosting state. As a result, the wind resistance of the outdoor heat exchanger becomes larger. Correspondingly, the speed of the outdoor fan is reduced or even drops sharply. That is, when the air conditioner is running in heating mode or defrost mode, the above-mentioned stall failure is very likely to occur, while when the air conditioner is running in dehumidification mode or cooling mode, the probability of the above-mentioned stall failure is extremely low. Therefore, the embodiment of the present disclosure obtains the speed value of the speed when the air conditioner is running in heating mode or defrost mode, and performs subsequent outdoor fan fault judgment. Improve the effectiveness of outdoor fan fault judgment.

[0066] Combination Figure 8As shown, the embodiment of the present disclosure also provides a fault detection method for an outdoor unit, comprising:

[0067] S21, the processor obtains the rotation speed value of the rotor.

[0068] S22, the processor determines whether the speed value is less than or equal to the speed lower limit threshold, if so, executes S23, if not, executes S25.

[0069] S23, the processor obtains the temperature value of the inner coil.

[0070] S24, the processor determines that the outdoor fan is faulty when the internal coil temperature is lower than a preset coil temperature, wherein the preset coil temperature represents a lower temperature threshold in the heating mode.

[0071] S25, the processor determines that the outdoor fan operates normally.

[0072] Using the fault detection method for an outdoor unit provided by the embodiment of the present disclosure, after determining whether the speed value is less than or equal to the speed lower limit threshold, the processor further obtains the heating effect of the air conditioner in the heating mode based on the comparison result between the inner coil temperature value and the preset coil temperature value. If the inner coil temperature value is lower than the preset coil temperature value, it indicates that the indoor heating capacity is not good. Therefore, it is determined that the indoor heating capacity has deteriorated due to the outdoor fan failure. The embodiment of the present disclosure comprehensively determines whether the outdoor fan has a fault based on the rotor speed value and the indoor heating capacity, thereby further improving the accuracy of outdoor fan fault judgment.

[0073] Optionally, after the processor determines that the outdoor fan fails, the process further includes:

[0074] Outputting prompt information of the fault status associated with the outdoor fan, wherein the prompt information may be one or more of text information, audio information and image information.

[0075] In this way, the user can be informed of the fault status of the outdoor fan at the first time, and restart the outdoor fan in time to handle the fault and adjust the heating capacity of the air conditioner.

[0076] It can be understood that after the temperature of the inner coil is higher than or equal to the preset coil temperature value, the processor further includes:

[0077] The processor obtains the change amount of the inner coil temperature within a preset time period, and determines that the outdoor fan is faulty when the change amount indicates that the current inner coil temperature is lower than the preset coil temperature value.

[0078] In this way, the real-time performance of outdoor fan fault judgment can be improved by real-time monitoring of changes in the internal coil temperature.

[0079] In practical applications, the outdoor unit is equipped with an outdoor fan and a radiator. The radiator includes a fin group 10. The fin group 10 includes a plurality of fins 101 arranged in parallel, and the wing surfaces of some or all of the fins 101 are configured with Tesla valve channels 102. The Tesla valve channels 102 are configured with a plurality of Magnus rotors along the conduction direction. 下限 Corresponds to the minimum wind speed value of the outdoor fan. 预设 Indicates the lower temperature threshold in heating mode.

[0080] The fault detection method for the outdoor unit specifically performs the following steps:

[0081] S31, the processor obtains the speed value v of the Magnus rotor. After judgment, v <v 下限 .

[0082] S32, the processor obtains the current internal coil temperature value T 内盘管 . It is judged that T 内盘管 <T 预设 , determine that the outdoor fan is faulty.

[0083] S33, the processor pushes voice prompt information. The voice prompt information includes audio information of the outdoor fan failure.

[0084] Combination Fig. 9 As shown, an embodiment of the present disclosure provides a fault detection device for an outdoor unit, 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 fault detection method for the outdoor unit of the above embodiment.

[0085] 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.

[0086] 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 fault detection method for the outdoor unit in the above embodiment is implemented.

[0087] 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.

[0088] The embodiment of the present disclosure provides an air conditioner, including an outdoor unit and the above-mentioned fault detection device for the outdoor unit. The outdoor unit includes a radiator and an outdoor fan. The radiator is located at the air outlet side of the outdoor fan, and the radiator is equipped with a rotor for detecting the wind speed of the outdoor fan.

[0089] 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 fault detection method for an outdoor unit.

[0090] An embodiment of the present disclosure provides a computer program product, which includes a computer program stored on a computer-readable storage medium, and the computer program includes program instructions. When the program instructions are executed by a computer, the computer executes the above-mentioned fault detection method for an outdoor unit.

[0091] The computer-readable storage medium mentioned above may be a transient computer-readable storage medium or a non-transitory computer-readable storage medium.

[0092] 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 enabling a computer device (which may be a personal computer, a server, or a network device, etc.) to perform 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), a random access memory (RAM), a disk or an optical disk, and other media that can store program codes, or a transient storage medium.

[0093] 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.

[0094] 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.

[0095] 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.

[0096] 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 fault detection method for an outdoor unit, characterized in that: The outdoor unit includes a radiator and an outdoor fan, the radiator is located at the air outlet side of the outdoor fan, the radiator is configured with a rotor for detecting the wind speed of the outdoor fan, the rotor includes a Magnus rotor, the radiator includes a fin group, the fin group includes a plurality of fins arranged in parallel, and the fin surfaces of some or all of the fins are constructed with Tesla valve grooves to make the airflow passing through the fins flow in one direction; the rotor is configured in the Tesla valve groove, the air inlet end of the Tesla valve groove is located at the air outlet side of the outdoor fan, the airflow generated by the outdoor fan passes through the fin group, and flows out of the radiator through the unidirectional drainage of the Tesla valve groove; the Tesla valve groove is extended along the length direction of the fin, and the conduction direction is consistent with the flow direction of the airflow, and the Tesla valve groove is configured with one or more rotors along the conduction direction; the method includes: Obtaining a rotation speed value of the rotor; Determining a fault state of the outdoor fan according to the rotation speed value; Determining the fault state of the outdoor unit according to the rotation speed value includes: When the rotation speed value is less than or equal to the rotation speed lower limit threshold, determining that the outdoor fan is faulty; When the rotation speed value is greater than the rotation speed lower limit threshold, it is determined that the outdoor fan is operating normally.

2. The method according to claim 1, characterized in that The obtaining of the rotation speed value of the rotor includes: Obtaining current rotational speed values ​​of all rotors configured on the Tesla valve channel; Obtaining a target speed value according to the current speed values ​​of all the rotors; The target rotation speed value is determined as the rotation speed value.

3. The method according to claim 1, characterized in that The obtaining of the rotation speed value of the rotor includes: Get the operating mode of the air conditioner; When the operation mode indicates a heating mode operation or a defrosting mode operation, a rotation speed value of the rotor is acquired.

4. The method according to claim 1, characterized in that: When the speed value is less than or equal to the speed lower limit threshold, determining that the outdoor fan is faulty includes: When the rotation speed value is less than or equal to the rotation speed lower limit threshold, obtaining the inner coil temperature value; When the temperature of the inner coil is lower than the preset coil temperature, determining that the outdoor fan is faulty; The preset coil temperature value represents the lower temperature threshold in the heating mode.

5. A fault detection device for an outdoor unit, comprising a processor and a memory storing program instructions, characterized in that: The processor is configured to execute the fault detection method for an outdoor unit according to any one of claims 1 to 4 when running the program instructions.

6. An air conditioner, characterized in that: include: An outdoor unit, the outdoor unit includes a radiator and an outdoor fan, the radiator is located at the air outlet side of the outdoor fan, the radiator is configured with a rotor for detecting the wind speed of the outdoor fan, and the rotor includes a Magnus rotor; the radiator includes a fin group, the fin group includes a plurality of fins arranged in parallel, and the fin surfaces of some or all of the fins are constructed with Tesla valve grooves to enable the airflow flowing through the fins to flow in one direction; the rotor is configured in the Tesla valve groove, the air inlet end of the Tesla valve groove is located at the air outlet side of the outdoor fan, the airflow generated by the outdoor fan passes through the fin group, and flows out of the radiator through the unidirectional drainage of the Tesla valve groove; the Tesla valve groove is extended along the length direction of the fin, and the conduction direction is consistent with the flow direction of the airflow, and the Tesla valve groove is configured with one or more rotors along the conduction direction; and, A fault detection device for an outdoor unit as claimed in claim 5.

7. A storage medium storing program instructions, characterized in that: When the program instructions are executed, the fault detection method for an outdoor unit according to any one of claims 1 to 4 is executed.

Images