Air conditioner inner fan fault detection method, air conditioner and readable storage medium

Abstract

The present application relates to a method for detecting a fault in an air conditioner fan, an air conditioner and a readable storage medium. The specific process of the method is to start the air conditioner; the air conditioner controller collects the indoor ambient temperature T in real time; in , evaporator coil temperature T e ; Get T according to the set time interval T1 in With T e Difference ΔT = T in ‑T e ; According to the set time interval T2, ΔT is arranged in the order of collection to form a temperature difference sequence; in each time interval T3, the latest temperature difference ΔT is obtained 新 , then re-assign the temperature difference sequence; according to the latest assigned temperature difference sequence, calculate ΔT n ‑ΔT1; obtain real-time collected T e 、Latest temperature difference ΔT 新 , ΔT of the latest assigned temperature difference sequence n ‑ΔT1; T e , ΔT 新 , ΔT n ΔT1 is compared with the threshold set by the air conditioning controller to predict whether the indoor fan is faulty. This method uses the existing temperature sensor of the air conditioning unit to monitor indoor fan faults in real time without adding additional hardware configuration, providing timely feedback and taking measures to improve the reliability of air conditioning operation.

Description

TECHNICAL FIELD

[0001] The present application relates to the air conditioning technical field, specifically relates to a kind of air conditioner inner fan fault detection method, air conditioner and readable storage medium. BACKGROUND

[0002] Air conditioner is generally composed of indoor unit, outdoor unit, compressor and outer fan motor, indoor unit is communicated with liquid pipe by air pipe to form circulation loop, among these main core components, compressor has overload protection system, and outer fan motor can only protect itself, and there is no feedback to the whole machine when running abnormally.If the indoor fan of air conditioner fails and cannot be effectively detected and judged, the air conditioning system and its compressor are at risk of damage.

[0003] However, the current air conditioner indoor fan fault detection method is generally relied on fan pulse feedback, this method is only suitable for direct current fan, and alternating current fan protector is usually built-in, and when fan overloads or fails, it cannot be fed back.The existing method is to increase current transformer, and feedback by detecting the current of fan during operation and calculating whether the power is normal.Also, it can be detected and fed back by the difference between outlet temperature and environment, which requires additional sensors to achieve. SUMMARY

[0004] The purpose of the present application is to solve the above problems, provide an air conditioner inner fan fault detection method, air conditioner and readable storage medium, without increasing the configuration of sensor, can accurately detect the fault of inner fan, so as to control the air conditioner to stop in time and protect the air conditioner.

[0005] To solve the above technical question, the first aspect of the present application provides an air conditioner inner fan fault detection method, comprising the following steps:

[0006] S1: start air conditioner;

[0007] S2: air conditioner controller real-time acquisition indoor environment temperature T in , evaporator coil temperature T e ;

[0008] S3: according to the set time interval T1, obtain T in And T e Difference ΔT=T in -T e ;

[0009] S4: according to the set time interval T2, ΔT is arranged in turn according to acquisition order;

[0010] S5: in each time interval T3, obtain the latest temperature difference ΔT 新, and then reassigning the temperature difference sequence; deleting the first temperature difference in the original temperature difference sequence, and moving each of the remaining temperature differences in the original temperature difference sequence by one position in sequence, and moving the temperature difference 新 as the last temperature difference in the re-assigned temperature difference sequence n ;

[0011] S6: obtaining the real-time collected T e , the newly assigned temperature difference ΔT, and the newly assigned temperature difference sequence;

[0012] S7: obtaining the real-time collected T e , the newly assigned temperature difference ΔT 新 , and the ΔT n -ΔT1 in the newly assigned temperature difference sequence;

[0013] S8: comparing T e , ΔT 新 , and ΔT n -ΔT1 with the threshold value set by the air conditioner controller to predict whether the internal fan is malfunctioning.

[0014] Further, in step S8, when T e ≤ the first threshold value, ΔT 新 ≥ the second threshold value, and ΔT n -ΔT1 ≥ the third threshold value, it is determined that the internal fan is malfunctioning.

[0015] Further, it further includes step S9, if it is determined that the internal fan is malfunctioning, the internal fan damper is raised to the highest damper or the internal fan is restarted to the highest damper.

[0016] Further, in step S9, after the internal fan runs at the highest damper for a set time T4, the difference between the newly collected evaporator coil temperature T e and the temperature T e collected before the internal fan damper is raised is compared with the threshold value set by the controller to determine whether the internal fan is malfunctioning.

[0017] Further, in step S9, if T e - T e ≤ the fourth threshold value, it is determined that the internal fan is malfunctioning, and the internal fan malfunction count is incremented by 1.

[0018] Further, after it is determined that the internal fan is malfunctioning, step S10 is entered: the compressor and the external fan are turned off, the compressor is restarted after a specified time T5, and the process returns to step S1 for re-detection.

[0019] Further, before step S1, the air conditioner controller needs to confirm the recorded internal fan malfunction count;

[0020] If the internal fan malfunction count is less than the set value, step S1 is executed.

[0021] If the number of failures of the inner fan is not less than the set value, the air conditioner is shut down, and the air conditioner reports a failure.

[0022] Further, the failure reporting mode of the air conditioner includes at least one of a mark reminder, a sound reminder, a light reminder, and a vibration reminder.

[0023] To solve the above technical problems, the second aspect of the present application provides an air conditioner, comprising a computer readable storage medium storing a computer program and a processor, wherein the computer program is read and run by the processor to implement the air conditioner inner fan failure detection method.

[0024] To solve the above technical problems, the third aspect of the present application provides a computer readable storage medium, wherein the computer readable storage medium stores a computer program, and the computer program is read and run by a processor to implement the air conditioner inner fan failure detection method.

[0025] Compared with the prior art, the present application has the following beneficial effects: the inner fan failure is monitored in real time, and timely feedback and measures are taken to improve the reliability of air conditioner operation; the existing temperature sensor of the air conditioner unit is used without increasing the configuration of additional hardware, and the evaporator coil temperature, the indoor environment temperature, and the difference between the indoor environment temperature and the evaporator coil temperature, as well as the difference between the last group and the first group of the temperature difference sequence of the indoor environment temperature and the evaporator coil temperature, are combined to predict the inner fan failure, so that the inner fan failure can be accurately detected, the air conditioner is shut down in time, the air conditioner is protected, and the life of the air conditioner system and the compressor is prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0026] The present application will be further described below in conjunction with the accompanying drawings.

[0027] Figure 1 The flowchart of the failure detection method.

[0028] Figure 2 The processing flowchart for predicting the inner fan failure.

[0029] Figure 3 The processing flowchart for failure number judgment. DETAILED DESCRIPTION

[0030] The preferred embodiments of the present application will be described in more detail below, however, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present application more thorough and complete, and to fully convey the scope of the present application to those skilled in the art. It should be understood that the specific examples described herein are only used to explain the present application and should not be used to limit the present application.

[0031] Example 1:

[0032] Current methods for detecting indoor air conditioner fan faults generally rely on pulse feedback from the fan itself. This method only works for DC fans, as AC fans typically have built-in protectors, which don't provide feedback when the fan is overloaded or damaged. Existing methods include adding a current transformer to detect the fan's current during operation and calculate power to ensure it's operating normally. Other methods use the difference between the outlet air temperature and the ambient temperature to detect and provide feedback, but these methods require additional sensors to implement.

[0033] When the air conditioner is in cooling operation, if the internal fan fails, the evaporator coil temperature will drop sharply. If the air conditioner is not shut down for protection in time, the compressor may suffer damage such as liquid hammer.

[0034] To solve the above problems, Example 1 provides a method for detecting faults in an air conditioner internal fan, which monitors internal fan faults in real time, provides timely feedback and takes measures to improve the reliability of air conditioner operation.

[0035] like Figure 1 As shown, the detection method includes the following steps:

[0036] S1: Start the air conditioner;

[0037] S2: The air conditioning controller collects the indoor ambient temperature T in real time in , evaporator coil temperature T e ;

[0038] S3: Get T according to the set time interval T1 in With T e Difference ΔT = T in -T e ;

[0039] For example, T1 is 5s, and the T collected within 5s is in 、T e Take the average value of , and calculate a set of ΔT;

[0040] S4: According to the set time interval T2, ΔT is arranged in the order of collection to form a temperature difference sequence ΔT1, ΔT2, ..., ΔT n ;

[0041] Here, T2 can be 60s, 90s, 120s, etc. Different air conditioners can be assigned values ​​according to actual conditions. For example, when T2 is 120s, a temperature difference sequence ΔT1, ΔT2, ..., ΔT is formed. 24 ;

[0042] In practical application, the temperature difference sequence is obtained to obtain the difference between the current temperature difference value and the temperature difference when the fan starts to malfunction; the temperature difference value when the fan starts to malfunction is ΔT1 (at this time, ΔT1 is the minimum value, which is the temperature difference value when the fan just malfunctions), and then the evaporator pipe temperature sharply decreases, and it takes a certain time (60s, 90s, 120s, etc., which is different for different configurations) to decrease to the lowest point; when the evaporator pipe temperature reaches the lowest point, the detected temperature difference value is ΔT n (At this time, ΔT n reaches the maximum value, which is the current temperature difference value).

[0043] S5: In each time interval T3, the temperature difference ΔT and the temperature difference sequence are constantly revalued, so that ΔT n = ΔT n-1 ;

[0044] S6: Obtain the real-time collected T e , the newly valued temperature difference ΔT, and the newly valued temperature difference sequence.

[0045] For example, when the time exceeds T2 (T2 is 120s here), the latest time ΔT . is collected 25 , and the temperature difference sequence is revalued, so that ΔT 25 = ΔT 24 , ΔT 24 = ΔT 23 , ΔT 23 = ΔT 22 , ΔT 24 = ΔT 23 , …, ΔT2 = ΔT1.

[0046] S7: Obtain the real-time collected T e , the latest temperature difference ΔT 新 , and the newly valued temperature difference sequence ΔT n - ΔT1; for example, calculate ΔT 24 - ΔT1.

[0047] S8: Compare T e , ΔT 新 , and ΔT n - ΔT1 with the threshold value set by the air conditioner controller to predict whether the inner fan is malfunctioning.

[0048] In this embodiment, in step S8, when T e ≤ the first threshold value, ΔT 新 ≥ the second threshold value, and ΔT n - ΔT1 ≥ the third threshold value, it is determined that the inner fan malfunctions.

[0049] For example, the real-time collected Te ≤ 3℃, latest group temperature difference ΔT 24 ≥ 30℃, temperature difference sequence group last group and first group difference ΔT 24 - ΔT1≥ 20℃, pre-judge the internal fan failure;

[0050] Here the first threshold = 3℃, the second threshold = 30℃, the third threshold = 20℃, different air conditioners can be assigned according to actual situation.

[0051] As shown in the pre-judgment of internal fan failure, the subsequent control processing steps are also required. Figure 2

[0052] In this embodiment, if the internal fan failure is pre-judged, the internal fan damper is raised to the highest damper or the internal fan is restarted to the highest damper.

[0053] In this embodiment, in step S9, the internal fan runs at the highest damper for a set time T4, and then the difference between the newly collected evaporator coil temperature T e and the temperature T e collected before the internal fan damper is raised is compared with the threshold set by the controller to determine whether the internal fan is faulty. Here T4, the fourth threshold value can be assigned according to actual situation for different air conditioners.

[0054] In this embodiment, in step S9, if T e -T e ≤ fourth threshold value, determine that the internal fan is faulty, and count the internal fan failure times +1.

[0055] In this embodiment, after determining that the internal fan is faulty, it enters step S10: turn off the compressor and the external fan, and after the compressor is turned off for a specified time T5, it is restarted and returns to step S1 for detection again. Different compressors have different T5, which is assigned according to the requirements of the compressor.

[0056] As shown in the pre-judgment of internal fan failure, the subsequent control processing steps are also required. Figure 3

[0057] In this embodiment, before step S1, the air conditioner controller confirms the current record of internal fan failure times.

[0058] If the internal fan failure times are less than the set value, step S1 is executed;

[0059] If the internal fan failure times are not less than the set value, the air conditioner is turned off and the air conditioner reports failure;

[0060] The set value can be assigned according to actual situation, which can be 1 time, 3 times, 6 times, etc. ​​

[0061] In the present embodiment, the failure modes of the air conditioner include, but are not limited to, a prompt, an acoustic prompt, a light prompt, and a vibration prompt.

[0062] In actual applications, the prompt includes, but is not limited to, a display on a display screen of an indoor unit, a light prompt, a display on an air conditioner remote controller, an APP message prompt, and an SMS prompt; and the acoustic prompt includes, but is not limited to, a sound prompt of a buzzer of the air conditioner and a voice prompt of the air conditioner.

[0063] The method can monitor the indoor fan failure in real time, and timely feedback and take measures to improve the reliability of the air conditioner.

[0064] The method uses the existing temperature sensor of the air conditioner unit, without adding additional hardware configuration, uses the evaporator coil temperature, the indoor environment temperature, the difference between the indoor environment temperature and the evaporator coil temperature, and the difference between the last group and the first group of the indoor environment temperature and the evaporator coil temperature, to predict the indoor fan failure, accurately detect the indoor fan failure, and timely control the air conditioner to stop running, thereby protecting the air conditioner and prolonging the service life of the air conditioner system and the compressor.

[0065] Embodiment 2

[0066] Embodiment 2 provides an air conditioner based on embodiment 1.

[0067] The air conditioner includes a computer readable storage medium storing a computer program and a processor, and the computer program is read and run by the processor to implement the air conditioner indoor fan failure detection method.

[0068] Embodiment 3

[0069] Embodiment 3 provides a computer readable storage medium based on embodiment 1.

[0070] The computer readable storage medium stores a computer program, and the computer program is read and run by the processor to implement the air conditioner indoor fan failure detection method.

[0071] In the present embodiment, the computer readable storage medium can include any medium capable of storing or transmitting information. Examples of the computer readable storage medium include electronic circuits, semiconductor memory devices, ROM, flash memory, erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, optical fiber media, radio frequency (RF) links, and the like. Code segments can be downloaded via a computer network such as the Internet, an intranet, and the like.

[0072] The foregoing summary, as well as the following detailed description of the application, is better understood when read in conjunction with the drawings, which are depicted in block diagram format. The application will be described with reference to specific embodiments and to the figures in which:

[0073] In the description of the present application, it should be understood that the orientation words such as "front, back, upper, lower, left, right", "transverse, vertical, perpendicular, horizontal" and "top, bottom" and the like indicated orientation or positional relationship are generally based on the shown orientation or positional relationship, only for the convenience of describing the present application and simplifying the description, without the contrary statement, these orientation words do not indicate and imply that the indicated device or element must have a particular orientation or be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation to the protection scope of the present application; the orientation words "inner, outer" refer to the inner and outer relative to the contour of each component itself.

[0074] For the convenience of description, spatial relative terms such as "over", "above", "upper surface", "upper" and the like can be used herein to describe the spatial positional relationship of features. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the described orientation.

[0075] In addition, it should be noted that the use of "first", "second" and the like words to define parts and components is only for the convenience of distinguishing the corresponding parts and components, and the above words have no special meaning unless otherwise stated, therefore, it cannot be understood as a limitation to the protection scope of the present application.

[0076] If the present application discloses or involves parts or structural elements fixedly connected with each other, unless otherwise stated, the fixed connection can be understood as: detachable fixed connection (for example, connected by bolts or screws), or as: non-detachable fixed connection (for example, riveting, welding), of course, the fixed connection with each other can also be replaced by an integral structure (for example, manufactured by integral forming process, except for obviously cannot be replaced by integral forming process).

[0077] The above preferred embodiments further illustrate the purpose, technical solutions and advantages of the present application, it should be understood that the above description is only for the preferred embodiments of the present application, and is not intended to limit the present application, any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A method for detecting a failure of an indoor fan of an air conditioner, characterized by, The method comprises the following steps: S1: starting the air conditioner; S2: The air conditioner controller collects the indoor environment temperature T in real time in , the evaporator coil temperature T e ; S3: Obtain T in with T e Difference ΔT = T in -T e ; S4: arranging the ΔT in the order of collection according to the set time interval T2 to form a temperature difference sequence; S5: At each time interval T3, the latest temperature difference ΔT is obtained 新 and the temperature difference sequence is then revalued; The first position of the original temperature difference sequence is deleted, and each of the remaining ΔTs in the original temperature difference sequence is sequentially moved one position forward, and ΔT 新 The last ΔT of the revalued temperature difference sequence n ; S6: Calculate ΔT according to the latest assigned temperature difference sequence n - ΔT1; S7: Obtain the real-time collected T e , the latest temperature difference ΔT 新 , the ΔT of the latest assigned temperature difference sequence n - ΔT1; S8: T e , ΔT 新 , ΔT n - ΔT1 is compared with the threshold value set by the air conditioner controller to predict whether the inner fan is faulty; In step S8, when T e ≤ first threshold, ΔT 新 ≥ second threshold, ΔT n - ΔT1≥ third threshold, pre-determine that the inner fan is malfunctioning.

2. The air conditioner indoor fan failure detection method of claim 1, wherein: The method further comprises a step S9: if the internal fan is predicted to be faulty, the internal fan damper is raised to the highest damper or the internal fan is restarted to the highest damper.

3. The air conditioner indoor fan failure detection method of claim 2, wherein: In step S9, the indoor fan runs at the highest air baffle for a set time T4, and then compares the difference between the newly collected evaporator coil temperature T e and the temperature T e collected before the indoor fan is raised to the threshold value set by the controller to determine whether the indoor fan is malfunctioning.

4. The air conditioner indoor fan failure detection method of claim 3, wherein: In step S9, if T e - T e ≤ the fourth threshold value, it is determined that the inner fan is malfunctioning, and the number of inner fan malfunctions is incremented by 1.

5. The method of claim 4, wherein the method further comprises: After determining that the internal fan is faulty, the method proceeds to a step S10: stopping the compressor and the external fan, and after the compressor is stopped for a specified time T5, the method resumes and returns to the step S1 to perform detection again.

6. The air conditioner indoor fan failure detection method of claim 5, wherein: Before the step S1, the air conditioner controller needs to confirm the number of recorded internal fan faults; If the number of internal fan faults is less than a set value, the step S1 is performed; If the number of internal fan faults is not less than the set value, the air conditioner is stopped, and the air conditioner reports a fault.

7. The method of claim 6, wherein the method further comprises: The way in which the air conditioner reports the fault comprises at least one of a prompt, a sound prompt, a light prompt, and a vibration prompt.

8. An air conditioner characterized by comprising: The method comprises a computer readable storage medium storing a computer program and a processor, and when the computer program is read and run by the processor, the air conditioner internal fan fault detection method of any one of claims 1-7 is implemented.

9. A computer-readable storage medium, characterized in that, The computer readable storage medium stores a computer program, and when the computer program is read and run by the processor, the air conditioner internal fan fault detection method of any one of claims 1-7 is implemented.

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