Troubleshooting methods, devices, fan coil units, equipment, media and procedures products

Abstract

This application relates to a fault handling method, apparatus, fan coil unit, temperature control equipment, storage medium, and computer program product. The method includes: acquiring spectrum information; performing fault analysis on the fan coil unit based on the spectrum information to obtain fault detection results; and, if the fault detection results indicate a fault in the fan coil unit and the fault is controllable, performing corresponding fault handling operations based on the fault type of the fan coil unit in the fault detection results; the fault type includes at least one of ventilation noise fault or mechanical noise fault. This method reduces the need for direct replacement with a new unit, thus lowering labor and material costs.

Description

Technical Field

[0001] This application relates to the field of fan coil unit technology, and in particular to a fault handling method, device, fan coil unit, temperature control equipment, storage medium and computer program product. Background Technology

[0002] Fan coil units are widely used terminal equipment in my country's air conditioning industry. They are used in conjunction with medium and large-sized water chillers such as centrifugal chillers and screw chillers to form central air conditioning systems. They are widely used in commercial places such as shopping malls, office buildings, hotels, and subway transportation. Fan coil units are mainly composed of core components such as surface coolers, motors, fans, and drip trays. The fans and motors are the driving components and are the main sources of noise. They are also the components with the most after-sales maintenance failures.

[0003] Because there are a large number of fan coil units installed in the rooms of the commercial building, the maintenance and repair workload of the fan motors is relatively large. In addition, in the traditional way, once a fan coil unit is detected as faulty, an alarm is issued and the after-sales service personnel directly replace it with a new fan coil unit.

[0004] Then, having after-sales maintenance personnel directly replace the fan coil unit is a method with relatively high labor and material costs. Summary of the Invention

[0005] Therefore, it is necessary to provide a fault handling method, device, fan unit, temperature control equipment, storage medium, and computer program product that can reduce labor and material costs in response to the above-mentioned technical problems.

[0006] Firstly, this application provides a fault handling method. The method includes:

[0007] Obtain spectrum information;

[0008] Based on the spectrum information, fault analysis is performed on the fan coil unit to obtain fault detection results;

[0009] If the fault detection result includes a fault in the fan coil unit and the fault is controllable, the corresponding fault handling operation shall be performed according to the fault type of the fan coil unit in the fault detection result; the fault type includes at least one of ventilation noise fault or mechanical noise fault.

[0010] In one embodiment, the spectrum information includes a spectrum diagram; based on the spectrum information, fault analysis is performed on the fan coil unit to obtain fault detection results, including:

[0011] Based on the noise frequency range generated by different fault types, determine the frequency bands in the spectrum that fall within the noise frequency range;

[0012] The average sound pressure level and the corresponding maximum sound pressure level for each frequency band are obtained. If the difference between the maximum sound pressure level and the average sound pressure level is greater than a preset difference, the fault type of the fan unit is determined to be the fault type corresponding to the noise frequency range.

[0013] In one embodiment, the step of performing corresponding fault handling operations based on the fault type of the fan coil unit in the fault detection result includes:

[0014] The step of performing corresponding fault handling operations based on the fault type of the fan coil unit in the fault detection results includes:

[0015] In the case where the fault type is the ventilation noise fault, the initial air volume and initial frequency are obtained;

[0016] Adjust the tilt angle of the surface cooler of the fan coil unit;

[0017] Obtain the current air volume and current frequency of the fan coil unit after the tilt angle is adjusted;

[0018] Based on the initial air volume, the initial frequency, the current air volume, and the current frequency, obtain a first ratio of the current air volume to the initial air volume and a second ratio of the current frequency to the initial frequency;

[0019] If the first ratio is greater than the first preset value and the second ratio is not greater than the second preset value, or if the first ratio is not greater than the first preset value and the second ratio is greater than the second preset value, the step of adjusting the tilt angle of the surface cooler of the fan coil unit is returned and continued until the first ratio is not greater than the first preset value and the second ratio is not greater than the second preset value, then the adjustment of the tilt angle of the surface cooler of the fan coil unit is stopped.

[0020] In one embodiment, obtaining the current air volume and current frequency of the fan coil unit after the tilt angle adjustment includes:

[0021] After the tilt angle of the surface cooler is adjusted, the fan conversion rate, current air resistance value, and fan efficiency are obtained.

[0022] Calculate the motor input power based on the current wind resistance value, the fan conversion rate, the fan efficiency, and the initial air volume;

[0023] Get the current motor torque;

[0024] The current speed is determined based on the motor input power and the current motor torque;

[0025] The current frequency is calculated based on the current rotational speed, the operating correction factor, and the number of fan blades;

[0026] Obtain the current air volume of the fan coil unit after the tilt angle is adjusted.

[0027] In one embodiment, adjusting the tilt angle of the surface cooler of the fan coil unit includes:

[0028] In the initial adjustment, reduce the tilt angle setting of the surface cooler, and determine the tilt angle of the surface cooler according to the reduced tilt angle setting;

[0029] In cases where it is not the first adjustment, the first ratio is greater than the first preset value, and the second ratio is not greater than the second preset value, the current tilt angle of the surface cooler is halved;

[0030] In cases where it is not the first adjustment, the first ratio is not greater than the first preset value, and the second ratio is greater than the second preset value, the tilt angle of the surface cooler is reduced, and the tilt angle of the surface cooler is determined according to the reduced tilt angle.

[0031] In one embodiment, when the fault type is the mechanical noise fault, initial noise sound pressure level information is obtained; the initial noise sound pressure level information includes an initial average noise level and an initial noise peak level.

[0032] Adjust the motor speed;

[0033] Obtain the current noise sound pressure level information after the motor speed is adjusted, the current noise sound pressure level information including the current average noise level and the current noise peak level;

[0034] Obtain the difference between the current noise peak value and the current noise average value. If the initial noise average value is not greater than the current noise average value and the difference is greater than the third preset value, return to the step of adjusting the motor speed and continue to execute until the difference is not greater than the third preset value, and stop adjusting the motor speed.

[0035] In one embodiment, adjusting the motor speed includes:

[0036] In the initial adjustment, the motor speed is increased according to the first adjustment value;

[0037] If the adjustment is not the first time and the initial noise peak value is not greater than the current noise peak value, the motor speed is increased according to the second adjustment value;

[0038] In cases where the initial noise peak value is less than the current noise peak value, the motor speed is increased according to the third adjustment value; both the first adjustment value and the second adjustment value are greater than the third adjustment value.

[0039] In one embodiment, the step of performing corresponding fault handling operations based on the fault type of the fan coil unit in the fault detection result includes:

[0040] When the fault type of the fan coil unit includes the ventilation noise fault and the mechanical noise fault, a first difference and a second difference are obtained; the first difference is the difference between the average sound pressure level and the largest sound pressure level in the frequency band corresponding to the fault type of ventilation noise fault; the second difference is the difference between the average sound pressure level and the largest sound pressure level in the frequency band corresponding to the fault type of mechanical noise fault.

[0041] Based on the first difference and the second difference, the priority of fault handling is determined;

[0042] Perform the corresponding fault handling operations according to the stated priority.

[0043] Secondly, this application also provides a fault handling apparatus. The apparatus includes:

[0044] The spectrum information acquisition module is used to acquire spectrum information;

[0045] The fault detection result acquisition module is used to perform fault analysis on the fan coil unit based on the spectrum information and obtain fault detection results;

[0046] The fault handling operation execution module is used to perform corresponding fault handling operations according to the fault type of the fan coil unit in the fault detection results when the fault detection results include the fault of the fan coil unit and the fault is controllable; the fault type includes at least one of ventilation noise fault or mechanical noise fault.

[0047] Thirdly, this application also provides a fan coil unit, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the steps of the above method.

[0048] Fourthly, this application also provides a temperature regulating device, including the aforementioned fan coil unit.

[0049] Fifthly, this application also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the above-described method.

[0050] Sixthly, this application also provides a computer program product, including a computer program that, when executed by a processor, implements the steps of the above-described method.

[0051] The aforementioned fault handling methods, devices, fan coil units, temperature control equipment, storage media, and computer program products acquire spectrum information; based on the spectrum information, fault analysis is performed on the fan coil units to obtain fault detection results; if the fault detection results include a fault in the fan coil unit and the fault is controllable, corresponding fault handling operations are executed according to the fault type of the fan coil unit in the fault detection results. Compared to the traditional method of directly issuing an alarm reminder once a fault is detected in the fan coil unit, and then having after-sales maintenance personnel directly replace the fan coil unit with a new one, this method identifies controllable faults through spectrum information and handles the faults accordingly, reducing the need for direct replacement of new units and lowering labor and material costs. Furthermore, by controlling controllable faults, the reliability of the fan coil unit is improved. Attached Figure Description

[0052] Figure 1 This is a flowchart illustrating a fault handling method in one embodiment;

[0053] Figure 2 This is a flowchart illustrating a fault handling method for ventilation noise faults in one embodiment.

[0054] Figure 3 This is a schematic diagram illustrating the process of obtaining the current air volume and current frequency in one embodiment;

[0055] Figure 4 This is a flowchart illustrating a fault handling method for mechanical noise faults in one embodiment.

[0056] Figure 5 This is a flowchart illustrating a fault handling method in another embodiment;

[0057] Figure 6 This is a flowchart illustrating a fault handling method for ventilation noise faults in yet another embodiment.

[0058] Figure 7 This is a flowchart illustrating a fault handling method for mechanical noise faults in yet another embodiment;

[0059] Figure 8 This is a flowchart illustrating the fault handling method in yet another embodiment;

[0060] Figure 9 This is a structural block diagram of a fault handling device in one embodiment. Detailed Implementation

[0061] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0062] In one embodiment, such as Figure 1 As shown, a fault handling method is provided, including the following steps:

[0063] Step 102: Obtain spectrum information.

[0064] The spectrum information may include frequency information and the corresponding sound pressure level information. The fan coil unit may include a data acquisition module and a data processing module. The data processing module acquires the data from the data acquisition module to obtain the spectrum information. Specifically, the data acquisition module collects the sound information from the fan coil unit, and the data processing module processes the collected sound information to obtain the spectrum information.

[0065] In practice, the fan coil unit mainly consists of core components such as surface cooler, motor, fan, and water collection pan.

[0066] Step 104: Based on the spectrum information, perform fault analysis on the fan coil unit to obtain fault detection results.

[0067] The fault detection results can include whether the fan coil unit is faulty and the type of fault within the fan coil unit. If the fan coil unit is faulty, the fault type can be determined based on the corresponding frequency information. If the fault type of the fan coil unit is motor structural noise or bearing noise, then the fault of the fan coil unit is determined to be uncontrollable.

[0068] For example, whether a fan coil unit is faulty and the corresponding fault type can be determined based on frequency information and the corresponding sound pressure level information in the spectrum information. Specifically, the sound pressure level information can include the maximum sound pressure level and the average sound pressure level. The fault type of the fan coil unit can be determined based on the sound pressure level information. The frequency information can include a spectrum diagram, which can be divided into frequency bands based on the noise frequency range. The fault type of the fan coil unit can be determined based on the frequency range corresponding to the frequency band where the maximum sound pressure level is located.

[0069] Step 106: If the fault detection result includes a fault in the fan coil unit and the fault is controllable, perform a corresponding fault handling operation according to the fault type of the fan coil unit in the fault detection result; the fault type includes at least one of ventilation noise fault or mechanical noise fault.

[0070] In cases where the fault type includes at least one of ventilation noise fault or mechanical noise fault, it is determined that the fault of the fan coil unit is controllable.

[0071] For example, if the fault detection results include a fan coil unit fault and the fault is controllable, corresponding fault handling operations are performed according to the fault type in the fault detection results. Specifically, if the fault type is a ventilation noise fault, the fault handling operation can be performed by adjusting the surface cooler in the fan coil unit. If the fault type is a machine noise fault, the fault handling operation can be performed by adjusting the motor in the fan coil unit. If the fault detection results indicate that the fan coil unit fault type is both a ventilation noise fault and a mechanical noise fault, the priority of fault handling is determined based on the spectrum information, and corresponding fault handling operations are performed according to the priority.

[0072] In some embodiments, if the fault type of the fan coil unit is a motor structural noise fault or a bearing noise fault, then the fault of the fan coil unit is determined to be uncontrollable. If the fault of the fan coil unit is uncontrollable, a fault alarm is issued. Furthermore, whenever an uncontrollable fault exists in the fan coil unit, a fault alarm is directly issued to remind the user that a new unit is needed.

[0073] In practice, motor structural noise and bearing noise are related to the manufacturing process parameters of the motor and bearings. Therefore, these are uncontrollable faults requiring repair by after-sales personnel. Ventilation noise, on the other hand, can be caused by dust accumulation and blockage in the fan coil unit over long-term operation, or improper duct installation. Mechanical noise can be caused by resonance between the motor and the product housing at a certain harmonic frequency of the mains power. Therefore, ventilation noise and mechanical noise are controllable faults.

[0074] In the above fault handling method, spectrum information is acquired; based on the spectrum information, fault analysis is performed on the fan coil unit to obtain fault detection results; if the fault detection results include a fault in the fan coil unit and the fault is controllable, corresponding fault handling operations are performed according to the fault type of the fan coil unit in the fault detection results. Compared with the traditional method of directly issuing an alarm reminder once a fault is identified in the fan coil unit, and then having after-sales maintenance personnel directly replace the fan coil unit with a new one, this method identifies controllable faults through spectrum information and handles the faults accordingly, reducing the need for direct replacement of new units and lowering labor and material costs. Furthermore, by controlling controllable faults, the reliability of the fan coil unit is improved.

[0075] In one embodiment, step 104 includes:

[0076] Step 1042: Determine the frequency bands in the spectrum that fall within the noise frequency range based on the noise frequency range generated by different fault types.

[0077] The spectral information can include spectral segments. The horizontal axis of each spectral segment represents frequency, and the vertical axis represents noise sound pressure level. The spectral segments are divided based on the frequency range of noise generated by different fault types.

[0078] Specifically, the noise frequency range can be set based on empirical values, and this invention does not impose any limitations on it.

[0079] In some embodiments, the fault types are motor structural noise fault, mechanical noise fault, ventilation noise fault, and bearing noise fault, with the noise frequencies in the corresponding noise frequency range increasing sequentially for each fault type. Therefore, the corresponding frequency bands can be determined in the spectrum diagram based on the noise frequency range. Since there are four fault types, the spectrum diagram can be divided into four frequency bands.

[0080] Step 1044: Obtain the average sound pressure level and the corresponding maximum sound pressure level for each frequency band. If the difference between the maximum sound pressure level and the average sound pressure level is greater than a preset difference, determine that the fault type of the fan unit is the fault type corresponding to the noise frequency range.

[0081] The average sound pressure level can be the average noise sound pressure level in the spectrum. The maximum sound pressure level is the maximum noise value corresponding to each spectrum segment.

[0082] In some embodiments, the horizontal axis of the spectrum can be noise frequency, and the vertical axis can be noise sound pressure level. Based on the presence of significant peaks in the spectrum, it is determined whether the current fan coil unit is malfunctioning, and based on the noise frequencies corresponding to the significant peaks, the malfunction type of the fan coil unit is determined. Specifically, the malfunction of the fan coil unit can be determined by the magnitude of the average sound pressure level and the corresponding maximum sound pressure level for each spectrum segment, and if the fan coil unit is malfunctioning, the corresponding malfunction type.

[0083] For example, a preset difference can be set, and the difference between the average sound pressure level and the maximum sound pressure level corresponding to each frequency band can be compared with the preset difference. If the difference is greater than the preset difference, the fan coil unit can be identified as faulty, and the fault type of the fan coil unit can be determined to be the fault type corresponding to the noise frequency range corresponding to the maximum sound pressure level. Specifically, the size of the preset difference can be set based on empirical values, and this invention does not impose any limitations on it.

[0084] In practice, in the frequency spectrum, faults with a significant peak in the noise frequency range of 0-100Hz are classified as motor structural noise faults; those with a significant peak in the noise frequency range of 100-400Hz are classified as mechanical noise faults; those with a significant peak in the noise frequency range of 400-1000Hz are classified as ventilation noise faults; and those with a significant peak in the noise frequency range above 1000Hz are classified as bearing noise faults. Specifically, a preset difference is set, and the difference between the average sound pressure level and the corresponding maximum sound pressure level for each frequency band is compared with the preset difference. If the difference is greater than the preset difference, a significant peak can be identified, indicating a fault in the fan coil unit. The preset difference can be an empirical value, typically set to 18dB.

[0085] In the above embodiments, the frequency range of noise generated by different fault types is used to determine the frequency bands in the spectrum that are within the noise frequency range; the average sound pressure level and the corresponding maximum sound pressure level of each frequency band are obtained; if the difference between the maximum sound pressure level and the average sound pressure level is greater than a preset difference, the fault type of the fan coil unit is determined to be the fault type corresponding to the noise frequency range. The fault type of the fan coil unit can be more easily determined through the spectrum diagram in the spectrum information. The adjustable fault can be identified by the fault type, and the fault can be handled, reducing the need to directly replace the new unit.

[0086] In one embodiment, step 106 includes: when the fault type of the fan coil unit includes the ventilation noise fault and the mechanical noise fault, obtaining a first difference and a second difference; the first difference is the difference between the average sound pressure level and the largest sound pressure level in the spectrum segment corresponding to the fault type of the ventilation noise fault; the second difference is the difference between the average sound pressure level and the largest sound pressure level in the spectrum segment corresponding to the fault type of the mechanical noise fault; determining the priority of fault handling based on the first difference and the second difference; and performing corresponding fault handling operations according to the priority.

[0087] The average sound pressure level can be the average of the noise sound pressure levels in the spectrum. The first difference can be the difference between the average sound pressure level and the highest sound pressure level in the spectrum corresponding to a ventilation noise fault. The second difference can be the difference between the average sound pressure level and the highest sound pressure level in the spectrum corresponding to a mechanical noise fault.

[0088] For example, when the fault types of the fan coil unit include ventilation noise faults and mechanical noise faults, a first difference and a second difference are obtained to determine the priority of fault handling based on the first difference and the second difference, and to perform corresponding fault handling operations according to the fault handling priority. Specifically, if the first difference is greater than the second difference, it is determined that ventilation noise faults should be handled first. If the first difference is less than the second difference, it is determined that mechanical noise faults should be handled first.

[0089] In some embodiments, the greater the difference between the average sound pressure level and the maximum sound pressure level in each frequency band, the greater the degree of the corresponding fault. Faults with a higher degree of fault are prioritized for handling to speed up the fault handling process and improve the efficiency of fault handling.

[0090] In the above embodiments, when the fault types of the fan coil unit include ventilation noise faults and mechanical noise faults, a first difference and a second difference are obtained to determine the priority of fault handling based on the first difference and the second difference, so as to perform corresponding fault handling operations according to the priority, thereby reducing the need to directly replace the new machine and reducing labor and material costs.

[0091] In one embodiment, reference Figure 2 The diagram illustrates a flowchart of a fault handling method for ventilation noise faults in one embodiment. Step 106 includes:

[0092] Step 202: In the case where the fault type is the ventilation noise fault, obtain the initial air volume and initial frequency.

[0093] The fan coil unit can be equipped with a data acquisition module to directly obtain the initial air volume and initial frequency. The initial frequency can be calculated based on the operating correction factor, the number of fan blades, and the initial speed by obtaining the initial rotational speed of the fan coil unit.

[0094] Ventilation noise malfunctions are generally caused by improper number of blades or blade spacing in the fan coil unit, insufficient clearance in the ventilation structure, or excessive resistance. In practice, long-term operation of the fan coil unit can easily lead to dust accumulation and blockage, or improper duct installation, which can reduce airflow resistance in the ventilation system and cause ventilation noise malfunctions such as vortex noise.

[0095] Step 204: Adjust the tilt angle of the surface cooler of the fan coil unit.

[0096] The full name of a surface cooler is a surface heat exchanger. Its principle is to allow a heat transfer medium, refrigerant, or cooling medium to flow through the inner cavity of a metal pipe, while the air to be processed flows through the outer wall of the metal pipe for heat exchange, thus achieving the purpose of heating or cooling the air.

[0097] For example, a fan coil unit may include a surface cooler and a controller. The controller controls and adjusts the tilt angle of the surface cooler of the fan coil unit. Specifically, in the case of a ventilation noise fault, the tilt angle of the surface cooler of the fan coil unit is reduced.

[0098] The tilt angle of the surface cooler is relative to the horizontal base plate of the fan coil unit. In practice, the tilt angle of the surface cooler in the fan coil unit is set to vertical, i.e., 90°, when the fan coil unit is shipped from the factory.

[0099] Step 206: Obtain the current air volume and current frequency of the fan coil unit after the tilt angle is adjusted.

[0100] For example, after the tilt angle of the surface cooler is adjusted, the current air volume and current frequency of the adjusted fan coil unit can be obtained.

[0101] In practice, during the handling of ventilation noise faults, it is essential to ensure that the current frequency of the fan coil unit after the tilt angle adjustment is within the noise frequency range corresponding to the ventilation noise fault.

[0102] Step 208: Based on the initial air volume, the initial frequency, the current air volume, and the current frequency, obtain a first ratio of the current air volume to the initial air volume and a second ratio of the current frequency to the initial frequency.

[0103] The first ratio can be the ratio of the current air volume to the initial air volume. The second ratio can be the ratio of the current frequency to the initial frequency.

[0104] In practice, after adjusting the tilt angle of the surface cooler, the current air volume obtained is greater than the initial air volume.

[0105] For example, after the tilt angle of the surface cooler is adjusted, a first ratio and a second ratio are determined based on the initial air volume, the initial frequency, the current air volume, and the current frequency.

[0106] Step 210: If the first ratio is greater than the first preset value and the second ratio is not greater than the second preset value, or if the first ratio is not greater than the first preset value and the second ratio is greater than the second preset value, return to the step of adjusting the tilt angle of the surface cooler of the fan coil unit and continue to execute until the first ratio is not greater than the first preset value and the second ratio is not greater than the second preset value, then stop adjusting the tilt angle of the surface cooler of the fan coil unit.

[0107] The values ​​of the first and second preset values ​​can be set based on experience. Specifically, the first preset value can be set to 1.03 based on experience, and the second preset value can be set to 1.01 based on experience.

[0108] For example, the first ratio is the ratio of the current air volume to the initial air volume. The second ratio is the ratio of the current frequency to the initial frequency. If the first ratio is greater than a first preset value and the second ratio is not greater than a second preset value, the tilt angle of the fan coil unit's surface cooler is controlled to continue adjusting; if the first ratio is not greater than the first preset value and the second ratio is greater than the second preset value, the tilt angle of the fan coil unit's surface cooler is controlled to continue adjusting. If the first ratio is not greater than the first preset value and the second ratio is not greater than the second preset value, the adjustment of the tilt angle of the fan coil unit's surface cooler is stopped.

[0109] In the above embodiments, the tilt angle of the fan coil unit's surface cooler is determined by the magnitudes of the first ratio and the first preset value, and the second ratio and the second preset value. This adjustment of the fan coil unit's surface cooler tilt angle enables troubleshooting of ventilation noise issues, reducing the need for direct replacement with a new unit and lowering labor and material costs. Furthermore, by controlling controllable faults, the reliability of the fan coil unit is improved.

[0110] In one embodiment, reference Figure 3 The diagram illustrates a flowchart of the process for obtaining the current airflow and current frequency in one embodiment. Step 206 includes:

[0111] Step 302: After adjusting the tilt angle of the surface cooler, obtain the fan conversion rate, current wind resistance value, and fan efficiency.

[0112] The current wind resistance value can be determined based on the range of tilt angles, using a corresponding wind resistance calculation formula. The fan conversion rate is the conversion rate between fan and motor power, typically 0.75.

[0113] In practice, the tilt angle of the surface cooler relative to the horizontal base plate is generally within the range of (15°, 90°). The tilt angle is typically set to θ1 at the factory, and the angle range corresponding to θ1 can be (75°, 90°). The program code representing the tilt angle of the surface cooler can include θ1, θ2, θ3, θ4, and θ5, each corresponding to a different wind resistance calculation formula. Specifically, refer to Table 1, which shows the relationship between the wind resistance formula and the tilt angle range.

[0114] Table 1

[0115]

[0116]

[0117] Where X is the wind speed obtained by the fan coil unit.

[0118] For example, after adjusting the tilt angle of the surface cooler in the fan coil unit, the fan conversion rate, current air resistance value, and fan efficiency can be obtained.

[0119] In some embodiments, since the factory setting of the tilt angle of the surface cooler is θ1, the corresponding wind resistance formula remains unchanged. After the tilt angle of the surface cooler changes, the corresponding wind resistance formula changes accordingly. Therefore, the rotational speed cannot be obtained directly. A new wind resistance formula is needed to obtain the motor speed again, thereby obtaining the noise frequency based on the motor speed.

[0120] Step 304: Calculate the motor input power based on the current wind resistance value, the fan conversion rate, the fan efficiency, and the initial air volume.

[0121] For example, the motor input power can be calculated based on the current wind resistance value, fan conversion rate, fan efficiency, and initial air volume. Specifically, the formula for calculating the motor input power is:

[0122]

[0123] Where Q1 is the initial air volume; 0.75 is the fan conversion rate; K is the current air resistance value; and η is the fan efficiency.

[0124] Step 306: Obtain the current motor torque.

[0125] Step 308: Determine the current speed based on the motor input power and the current motor torque.

[0126] For example, the current motor torque can be obtained to determine the current speed based on the motor input power and the current motor torque. Specifically, the formula for calculating the current speed is:

[0127]

[0128] Where n is the current speed; P is the motor input power; and T is the current motor torque.

[0129] Step 310: Calculate the current frequency based on the current rotational speed, operating correction coefficient, and number of fan blades.

[0130] The operating correction factor is related to the number of fan blades and the model of the fan coil unit.

[0131] For example, the current frequency can be calculated based on the current rotational speed, operating correction factor, and number of fan blades. Specifically, the formula for calculating the current frequency is:

[0132]

[0133] Where f is the current frequency; k is the operation correction factor; m is the number of wind turbine blades; and n is the current rotational speed.

[0134] Step 312: Obtain the current air volume of the fan coil unit after the tilt angle is adjusted.

[0135] In the above embodiments, after adjusting the tilt angle of the surface cooler, the fan conversion rate, current air resistance value, and fan efficiency are obtained; the motor input power is calculated based on the current air resistance value, fan conversion rate, fan efficiency, and initial air volume; the current motor torque is obtained; the current speed is determined based on the motor input power and current motor torque; the current frequency is calculated based on the current speed, operating correction coefficient, and number of fan blades, so as to determine whether it is necessary to continue adjusting the tilt angle of the surface cooler of the fan coil unit based on the initial air volume, initial frequency, current air volume, and the current frequency. Thus, by adjusting the tilt angle of the surface cooler of the fan coil unit, the fault handling operation for ventilation noise faults is realized, reducing the need for direct replacement of new units and lowering labor and material costs.

[0136] In one embodiment, step 204 includes:

[0137] Step 2042: In the case of the first adjustment, reduce the tilt angle setting of the surface cooler, and determine the tilt angle of the surface cooler according to the reduced tilt angle setting.

[0138] There are 5 tilt angle settings for the surface cooler, and the corresponding tilt angle ranges can include (75°, 90°], (60°, 75°], (45°, 60°], (30°, 45°] and (15°, 30°], respectively. The program codes corresponding to the tilt angle settings are θ1, θ2, θ3, θ4 and θ5.

[0139] For example, when the tilt angle of the surface cooler is being adjusted for the first time, the tilt angle setting of the surface cooler is reduced, and the tilt angle of the surface cooler is determined according to the reduced tilt angle setting. Specifically, if the tilt angle setting corresponding to the tilt angle of the surface cooler before the first adjustment is θ1, then the tilt angle setting corresponding to the adjusted tilt angle is θ2.

[0140] Step 2044: If this is not the first adjustment, and the first ratio is greater than the first preset value and the second ratio is not greater than the second preset value, then the current tilt angle of the surface cooler is halved.

[0141] For example, in cases where it is not the first adjustment, the first ratio is greater than the first preset value, and the second ratio is not greater than the second preset value, the current tilt angle of the surface cooler is reduced. Specifically, the current tilt angle of the surface cooler is adjusted to half of its original value.

[0142] Step 2046: In cases where it is not the first adjustment, the first ratio is not greater than the first preset value, and the second ratio is greater than the second preset value, reduce the tilt angle setting of the surface cooler, and determine the tilt angle of the surface cooler according to the reduced tilt angle setting.

[0143] For example, when adjusting for the first time, the first ratio is not greater than the first preset value, and the second ratio is greater than the second preset value, the tilt angle of the surface cooler is reduced, and the tilt angle of the surface cooler is determined according to the reduced tilt angle. Specifically, if the tilt angle corresponding to the tilt angle of the surface cooler after the previous adjustment is θ2, then the tilt angle corresponding to the tilt angle to be adjusted this time is θ3.

[0144] In the above embodiments, the tilt angle of the surface cooler is adjusted according to the magnitude of the first ratio and the second ratio, thereby achieving more precise control of the tilt angle of the surface cooler. This enables precise troubleshooting of ventilation noise faults, reduces the need for direct replacement with a new machine, and lowers labor and material costs.

[0145] In one embodiment, reference Figure 4 A flowchart illustrating a troubleshooting method for mechanical noise faults is shown. Step 106 includes:

[0146] Step 402: In the case where the fault type is the mechanical noise fault, obtain the initial noise sound pressure level information; the initial noise sound pressure level information includes the initial noise average value and the initial noise peak value.

[0147] In practice, mechanical noise faults can be caused by resonance between the motor and the product casing at a certain harmonic frequency of the mains power.

[0148] The initial noise sound pressure level information can be obtained based on initial spectral information. This initial noise sound pressure level information can include the initial average noise level and the initial peak noise level. The initial average noise level is the average noise sound pressure level obtained based on the initial spectral information. The initial peak noise level is the peak noise sound pressure level obtained based on the initial spectral information.

[0149] Step 404: Adjust the motor speed.

[0150] For example, the fan coil unit may include a motor. Mechanical noise faults are addressed by adjusting the motor speed. Specifically, adjusting the motor speed can involve increasing the motor speed.

[0151] Step 406: Obtain the current noise sound pressure level information after the motor speed is adjusted. The current noise sound pressure level information includes the current average noise level and the current peak noise level.

[0152] For example, the current noise sound pressure level information can be obtained based on the current spectrum information acquired after adjusting the motor speed. The current noise sound pressure level information can include the current average noise level and the current peak noise level. The current average noise level is the average noise sound pressure level obtained based on the current spectrum information. The current peak noise level is the peak noise sound pressure level obtained based on the current spectrum information.

[0153] Step 408: Obtain the difference between the current noise peak value and the current noise average value. If the initial noise average value is not greater than the current noise average value and the difference is greater than the third preset value, return to the step of adjusting the motor speed and continue to execute until the difference is not greater than the third preset value, and stop adjusting the motor speed.

[0154] For example, the difference between the current noise peak value and the current noise average value can be obtained. If the initial noise average value is not greater than the current noise average value and the difference is greater than a third preset value, the process returns to the step of adjusting the motor speed and continues until the difference is no greater than the third preset value, at which point the adjustment of the motor speed stops. Specifically, if the initial noise average value is not greater than the current noise average value, the initial noise peak value is not greater than the current noise peak value, and the difference is greater than the third preset value, the process returns to the step of adjusting the motor speed and continues. If the initial noise average value is not greater than the current noise average value, the initial noise peak value is greater than the current noise peak value, and the difference is greater than the third preset value, the process returns to the step of adjusting the motor speed and continues. If the initial noise average value is not greater than the current noise average value, the initial noise peak value is greater than the current noise peak value, and the difference is no greater than the third preset value, the adjustment of the motor speed stops. The third preset value can be preset to be equal to the difference value; specifically, the third preset value can be set based on empirical values, and this invention does not impose limitations on this.

[0155] In practice, when troubleshooting mechanical noise faults, it is crucial to ensure that the current frequency of the fan coil unit after motor speed adjustment is within the noise frequency range corresponding to the mechanical noise fault, in order to avoid misdiagnosis caused by other faults. Specifically, the frequency calculation formula for mechanical noise faults is as follows:

[0156]

[0157] Where k is the operating correction coefficient; z is the number of rotor slots of the motor; n is the adjusted speed; and f0 is the mains power frequency.

[0158] The operating correction factor and the number of rotor slots of the motor are related to the model of the fan coil unit. Generally, the domestic mains power frequency is 50Hz.

[0159] In the above embodiments, after adjusting the motor speed, the current peak noise level and the current average noise level are obtained. If the initial average noise level is not greater than the current average noise level, and the initial peak noise level is greater than the current peak noise level, the difference between the current peak noise level and the current average noise level determines whether to continue adjusting the motor speed. This adjustment of the fan coil unit's motor speed effectively addresses mechanical noise faults, reducing the need for direct replacement and lowering labor and material costs. Furthermore, by controlling controllable faults, the reliability of the fan coil unit is improved.

[0160] In one embodiment, step 404 includes:

[0161] Step 4042: In the case of the first adjustment, increase the motor speed according to the first adjustment value.

[0162] Step 4044: If it is not the first adjustment and the initial noise peak value is not greater than the current noise peak value, increase the motor speed according to the second adjustment value.

[0163] Step 4046: If this is not the first adjustment and the initial noise peak is less than the current noise peak, increase the motor speed according to the third adjustment value; both the first adjustment value and the second adjustment value are greater than the third adjustment value.

[0164] The first adjustment value and the second adjustment value can both be greater than the third adjustment value. The first adjustment value and the second adjustment value can be equal. Specifically, the values ​​of the first adjustment value, the second adjustment value, and the third adjustment value can be set based on actual circumstances, and this invention does not impose any limitations on them.

[0165] For example, when the motor speed is being adjusted for the first time, the motor speed is increased according to a first adjustment value. When the motor speed is not being adjusted for the first time, the initial average noise level is not greater than the current average noise level, the initial peak noise level is not greater than the current peak noise level, and the difference between the current peak noise level and the current average noise level is greater than a third preset value, the motor speed is increased according to a second adjustment value. When the motor speed is not being adjusted for the first time, the initial average noise level is not greater than the current average noise level, the initial peak noise level is greater than the current peak noise level, and the difference is greater than a third preset value, the motor speed is increased according to a third adjustment value.

[0166] In the above embodiments, different levels of motor speed control are determined based on the initial average noise level, the current average noise level, the initial peak noise level, and the current peak noise level, so as to more accurately control the motor speed and thus more accurately handle mechanical noise faults, reduce the need to directly replace the machine with a new one, and reduce labor and material costs.

[0167] In one embodiment, to better understand the fault handling process in this embodiment of the invention, a complete example is provided, referring to... Figure 5 The diagram illustrates a fault handling method in another embodiment, including the following steps:

[0168] Step 502: Obtain frequency information including the spectrogram.

[0169] Step 504: Determine the frequency range of the noise in the spectrum diagram based on the noise frequency range generated by different fault types.

[0170] Step 506: Obtain the average sound pressure level and the corresponding maximum sound pressure level for each spectral band.

[0171] Step 508: If the difference between the maximum sound pressure level and the average sound pressure level is greater than the preset difference, determine the fault type of the fan coil unit as the fault type corresponding to the noise frequency range.

[0172] Step 510: If the fault type includes at least one of ventilation noise fault or mechanical noise fault, determine that the fault of the fan coil unit is controllable.

[0173] Step 512: If the fault type includes at least one of motor structure noise fault and bearing noise fault, determine that the fault of the fan coil unit is uncontrollable.

[0174] In some embodiments, to better understand the fault handling process for ventilation noise faults in the embodiments of the present invention, a complete example is provided, referring to... Figure 6 The diagram illustrates a fault handling process for ventilation noise issues in yet another embodiment, including the following steps:

[0175] Step 602: If the fault type is ventilation noise fault, obtain the initial air volume and initial frequency.

[0176] Specifically, the initial air volume and initial speed of the fan coil unit can be obtained, and the initial frequency can be obtained based on the initial speed.

[0177] Step 604: Reduce the tilt angle setting of the surface cooler, and determine the tilt angle of the surface cooler according to the reduced tilt angle setting.

[0178] Step 606: Calculate the motor input power based on the current wind resistance value, fan conversion rate, fan efficiency, and initial air volume.

[0179] Step 608: Determine the current speed based on the motor input power and the current motor torque.

[0180] Step 610: Calculate the current frequency and obtain the current air volume based on the current rotational speed, operating correction coefficient and number of fan blades.

[0181] Step 612: Based on the initial air volume, initial frequency, current air volume, and current frequency, obtain the first ratio of the current air volume to the initial air volume and the second ratio of the current frequency to the initial frequency.

[0182] Step 614: If the first ratio is greater than the first preset value and the second ratio is not greater than the second preset value, the current tilt angle of the surface cooler is halved, and the process jumps to step 606.

[0183] Step 616: If the first ratio is not greater than the first preset value and the second ratio is greater than the second preset value, the tilt angle of the surface cooler will be reduced, and the tilt angle of the surface cooler will be determined according to the reduced tilt angle. Then, proceed to step 606.

[0184] Step 618: If the first ratio is not greater than the first preset value and the second ratio is not greater than the second preset value, then stop adjusting the tilt angle of the fan coil unit's surface cooler.

[0185] In some embodiments, to better understand the fault handling process for mechanical noise faults in the embodiments of the present invention, a complete example is provided, referring to... Figure 7 The diagram illustrates a fault handling method for mechanical noise faults in yet another embodiment, including the following steps:

[0186] Step 702: In the case of mechanical noise fault, obtain the initial average noise value and the initial peak noise value.

[0187] Step 704: Increase the motor speed according to the first adjustment value.

[0188] Step 706: Obtain the current average noise level and the current peak noise level after the motor speed adjustment.

[0189] Step 708: Obtain the difference between the current noise peak value and the current noise average value.

[0190] Step 710: If the initial average noise level is not greater than the current average noise level, the initial peak noise level is not greater than the current peak noise level, and the difference is greater than the third preset value, increase the motor speed according to the second adjustment value, and jump to step 706.

[0191] Step 712: If the initial average noise level is not greater than the current average noise level, the initial peak noise level is greater than the current peak noise level, and the difference is greater than the third preset value, increase the motor speed according to the third adjustment value; jump to step 706.

[0192] Step 714: If the initial average noise level is not greater than the current average noise level, the initial peak noise level is greater than the current peak noise level, and the difference is not greater than the third preset value, stop adjusting the motor speed.

[0193] To better understand the complete noise reduction control process in the embodiments of the present invention, a complete example is provided for illustration. (Refer to...) Figure 8 The diagram illustrates a fault handling method in yet another embodiment, including the following steps:

[0194] Step 802: Determine the frequency range of the noise in the spectrum diagram based on the noise frequency range generated by different fault types.

[0195] Step 804: Obtain the average sound pressure level and the corresponding maximum sound pressure level for each frequency band. If the difference between the maximum sound pressure level and the average sound pressure level is greater than a preset difference, determine the fault type of the fan coil unit as the fault type corresponding to the noise frequency range.

[0196] Step 806: In the case of a ventilation noise fault, obtain the initial air volume and initial frequency; and adjust the tilt angle of the surface cooler of the fan coil unit.

[0197] Step 808: After adjusting the tilt angle of the surface cooler, obtain the fan conversion rate, current air resistance value, and fan efficiency; calculate the motor input power based on the current air resistance value, fan conversion rate, fan efficiency, and initial air volume; determine the current speed based on the motor input power and current motor torque; calculate the current frequency based on the current speed, operating correction coefficient, and number of fan blades; and obtain the current air volume of the fan coil unit after the tilt angle adjustment.

[0198] Step 810: Based on the initial air volume, initial frequency, current air volume, and current frequency, obtain the first ratio of the current air volume to the initial air volume and the second ratio of the current frequency to the initial frequency.

[0199] Step 812: If the first ratio is greater than the first preset value and the second ratio is not greater than the second preset value, or if the first ratio is not greater than the first preset value and the second ratio is greater than the second preset value, return to the step of adjusting the tilt angle of the fan coil unit's surface cooler and continue to execute until the first ratio is not greater than the first preset value and the second ratio is not greater than the second preset value, then stop adjusting the tilt angle of the fan coil unit's surface cooler.

[0200] Step 814: If the fault type is mechanical noise fault, obtain the initial noise sound pressure level information and adjust the motor speed.

[0201] Step 816: Obtain the difference between the current noise peak value and the current noise average value. If the initial noise average value is not greater than the current noise average value and the difference is greater than the third preset value, return to the step of adjusting the motor speed and continue to execute until the difference is not greater than the third preset value, and stop adjusting the motor speed.

[0202] In this embodiment, spectrum information is acquired; based on the spectrum information, fault analysis is performed on the fan coil unit to obtain fault detection results; if the fault detection results include a fault in the fan coil unit and the fault is controllable, corresponding fault handling operations are performed according to the fault type of the fan coil unit in the fault detection results. Compared to the traditional method of directly issuing an alarm reminder once a fault is identified in the fan coil unit, and then having after-sales maintenance personnel directly replace the fan coil unit with a new one, this method identifies controllable faults through spectrum information and handles the faults, reducing the need for direct replacement of new units and lowering labor and material costs. Furthermore, by controlling controllable faults, the reliability of the fan coil unit is improved.

[0203] It should be understood that although the steps in the flowcharts of the embodiments described above are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the embodiments described above may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages of other steps.

[0204] Based on the same inventive concept, this application also provides a fault handling apparatus for implementing the fault handling method described above. The solution provided by this apparatus is similar to the solution described in the above method; therefore, the specific limitations in one or more fault handling apparatus embodiments provided below can be found in the limitations of the fault handling method described above, and will not be repeated here.

[0205] In one embodiment, such as Figure 9 As shown, a fault handling device is provided, including: a spectrum information acquisition module 902, a fault detection result acquisition module 904, and a fault handling operation execution module 906, wherein:

[0206] The spectrum information acquisition module 902 is used to acquire spectrum information;

[0207] The fault detection result acquisition module 904 is used to perform fault analysis on the fan coil unit based on the spectrum information and obtain fault detection results;

[0208] The fault handling operation execution module 906 is used to perform corresponding fault handling operations according to the fault type of the fan coil unit in the fault detection results when the fault detection results include the fault of the fan coil unit and the fault is adjustable; the fault type includes at least one of ventilation noise fault or mechanical noise fault.

[0209] In some embodiments, the fault detection result obtaining module 904 includes:

[0210] The spectrum segment determination submodule is used to determine the spectrum segments in the spectrum that fall within the noise frequency range based on the noise frequency range generated by different fault types.

[0211] The fault type determination submodule is used to obtain the average sound pressure level and the corresponding maximum sound pressure level for each frequency band. If the difference between the maximum sound pressure level and the average sound pressure level is greater than a preset difference, the fault type of the fan coil unit is determined to be the fault type corresponding to the noise frequency range.

[0212] In some embodiments, the fault handling operation execution module 906 includes:

[0213] An initial air volume and frequency acquisition submodule is used to acquire the initial air volume and initial frequency when the fault type is the ventilation noise fault.

[0214] The tilt angle adjustment submodule is used to adjust the tilt angle of the surface cooler of the fan coil unit;

[0215] The current air volume and frequency acquisition submodule is used to acquire the current air volume and current frequency of the fan coil unit after the tilt angle is adjusted.

[0216] The ratio acquisition submodule is used to acquire a first ratio of the current air volume to the initial air volume and a second ratio of the current frequency to the initial frequency based on the initial air volume, the initial frequency, the current air volume, and the current frequency.

[0217] The first fault handling submodule is used to return to the step of adjusting the tilt angle of the surface cooler of the fan coil unit and continue to execute when the first ratio is greater than the first preset value and the second ratio is not greater than the second preset value, or when the first ratio is not greater than the first preset value and the second ratio is greater than the second preset value, until the first ratio is not greater than the first preset value and the second ratio is not greater than the second preset value, then stop adjusting the tilt angle of the surface cooler of the fan coil unit.

[0218] In some embodiments, the current air volume and frequency acquisition submodule includes:

[0219] The conversion rate and wind resistance value acquisition unit is used to acquire the fan conversion rate, current wind resistance value and fan efficiency after the tilt angle of the surface cooler is adjusted;

[0220] The input power calculation unit is used to calculate the motor input power based on the current wind resistance value, the fan conversion rate, the fan efficiency, and the initial air volume.

[0221] The motor torque acquisition unit is used to acquire the current motor torque;

[0222] The current speed determination unit is used to determine the current speed based on the motor input power and the current motor torque;

[0223] The current frequency calculation unit is used to calculate the current frequency based on the current rotational speed, the operating correction coefficient, and the number of wind turbine blades;

[0224] The current air volume acquisition unit is used to acquire the current air volume of the fan coil unit after the tilt angle is adjusted.

[0225] In some embodiments, the tilt angle adjustment submodule includes:

[0226] The first tilt angle adjustment unit is used to reduce the tilt angle level of the surface cooler during the first adjustment, and to determine the tilt angle of the surface cooler according to the reduced tilt angle level.

[0227] The second tilt angle adjustment unit is used to halve the current tilt angle of the surface cooler when it is not the first adjustment, the first ratio is greater than the first preset value and the second ratio is not greater than the second preset value;

[0228] The third tilt angle adjustment unit is used to reduce the tilt angle level of the surface cooler when it is not the first adjustment, the first ratio is not greater than the first preset value and the second ratio is greater than the second preset value, and to determine the tilt angle of the surface cooler according to the reduced tilt angle level.

[0229] In some embodiments, the fault handling operation execution module 906 includes:

[0230] The initial noise sound pressure level information acquisition submodule is used to acquire initial noise sound pressure level information when the fault type is the mechanical noise fault; the initial noise sound pressure level information includes the initial noise average value and the initial noise peak value;

[0231] The motor speed adjustment submodule is used to adjust the motor speed;

[0232] The current noise sound pressure level information acquisition submodule is used to acquire the current noise sound pressure level information after the motor speed is adjusted. The current noise sound pressure level information includes the current average noise level and the current noise peak value.

[0233] The second fault handling submodule is used to obtain the difference between the current noise peak value and the current noise average value. If the initial noise average value is not greater than the current noise average value and the difference is greater than the third preset value, the module returns to the step of adjusting the motor speed and continues to execute until the difference is not greater than the third preset value, and then stops adjusting the motor speed.

[0234] In some embodiments, the motor speed adjustment submodule includes:

[0235] The first speed adjustment unit is used to increase the motor speed according to the first adjustment value in the case of the first adjustment;

[0236] The second speed adjustment unit is used to increase the motor speed according to the second adjustment value when it is not the first adjustment and the initial noise peak value is not greater than the current noise peak value.

[0237] The third speed adjustment unit is used to increase the motor speed according to the third adjustment value when it is not the first adjustment and the initial noise peak value is less than the current noise peak value; both the first adjustment value and the second adjustment value are greater than the third adjustment value.

[0238] In some embodiments, the fault handling operation execution module 906 includes:

[0239] The difference acquisition submodule is used to acquire a first difference and a second difference when the fault type of the fan coil unit includes the ventilation noise fault and the mechanical noise fault; the first difference is the difference between the average sound pressure level and the largest sound pressure level in the frequency band corresponding to the fault type of the ventilation noise fault; the second difference is the difference between the average sound pressure level and the largest sound pressure level in the frequency band corresponding to the fault type of the mechanical noise fault.

[0240] The priority determination submodule is used to determine the priority of fault handling based on the first difference and the second difference;

[0241] The third fault handling submodule is used to perform corresponding fault handling operations according to the stated priority.

[0242] Each module in the aforementioned fault handling device can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in the processor of a computer device in hardware form or independent of it, or stored in the memory of the computer device in software form, so that the processor can call and execute the operations corresponding to each module.

[0243] In one embodiment, a fan coil unit is provided, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the steps of the above-described fault handling method.

[0244] In one embodiment, a temperature regulating device is provided, including the aforementioned fan coil unit.

[0245] In one embodiment, a computer-readable storage medium is provided having a computer program stored thereon, which, when executed by a processor, implements the steps in the various method embodiments.

[0246] In one embodiment, a computer program product is provided, including a computer program that, when executed by a processor, implements the steps of the various method embodiments.

[0247] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, data stored, data displayed, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of the relevant data shall comply with the relevant laws, regulations and standards of the relevant countries and regions.

[0248] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM). The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, etc., and are not limited to these.

[0249] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0250] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A fault handling method, characterized in that, The method includes: Obtain spectrum information; Based on the spectrum information, fault analysis is performed on the fan coil unit to obtain fault detection results; If the fault detection result includes a fault in the fan coil unit and the fault is adjustable, a corresponding fault handling operation is performed according to the fault type of the fan coil unit in the fault detection result; the fault type includes at least one of ventilation noise fault or mechanical noise fault; wherein, if the fault type is ventilation noise fault, the initial air volume and initial frequency are obtained; the tilt angle of the surface cooler of the fan coil unit is adjusted; the current air volume and current frequency of the fan coil unit after the tilt angle adjustment are obtained; based on the initial air volume, the initial frequency, the current air volume, and the current frequency, a first ratio of the current air volume to the initial air volume and a second ratio of the current frequency to the initial frequency are obtained; if the first ratio is greater than a first preset value and the second ratio is not greater than a second preset value, or if the first ratio is not greater than the first preset value and the second ratio is greater than the second preset value, the step of adjusting the tilt angle of the surface cooler of the fan coil unit is returned and continued until the first ratio is not greater than the first preset value and the second ratio is not greater than the second preset value, then the adjustment of the tilt angle of the surface cooler of the fan coil unit is stopped.

2. The method according to claim 1, characterized in that, The spectrum information includes a spectrum diagram; based on the spectrum information, fault analysis is performed on the fan coil unit to obtain fault detection results, including: Based on the noise frequency range generated by different fault types, determine the frequency bands in the spectrum that fall within the noise frequency range; The average sound pressure level and the corresponding maximum sound pressure level for each frequency band are obtained. If the difference between the maximum sound pressure level and the average sound pressure level is greater than a preset difference, the fault type of the fan unit is determined to be the fault type corresponding to the noise frequency range.

3. The method according to claim 1, characterized in that, The process of obtaining the current air volume and current frequency of the fan coil unit after the tilt angle adjustment includes: After the tilt angle of the surface cooler is adjusted, the fan conversion rate, current air resistance value, and fan efficiency are obtained. Calculate the motor input power based on the current wind resistance value, the fan conversion rate, the fan efficiency, and the initial air volume; Get the current motor torque; The current speed is determined based on the motor input power and the current motor torque; The current frequency is calculated based on the current rotational speed, the operating correction factor, and the number of fan blades; Obtain the current air volume of the fan coil unit after the tilt angle is adjusted.

4. The method according to claim 1, characterized in that, Adjusting the tilt angle of the surface cooler of the fan coil unit includes: In the initial adjustment, reduce the tilt angle setting of the surface cooler, and determine the tilt angle of the surface cooler according to the reduced tilt angle setting; In cases where it is not the first adjustment, the first ratio is greater than the first preset value, and the second ratio is not greater than the second preset value, the current tilt angle of the surface cooler is halved; In cases where it is not the first adjustment, the first ratio is not greater than the first preset value, and the second ratio is greater than the second preset value, the tilt angle of the surface cooler is reduced, and the tilt angle of the surface cooler is determined according to the reduced tilt angle.

5. The method according to claim 1, characterized in that, The step of performing corresponding fault handling operations based on the fault type of the fan coil unit includes: In the case where the fault type is the mechanical noise fault, the initial noise sound pressure level information is obtained; the initial noise sound pressure level information includes the initial noise average value and the initial noise peak value; Adjust the motor speed; Obtain the current noise sound pressure level information after the motor speed is adjusted, the current noise sound pressure level information including the current average noise level and the current noise peak level; Obtain the difference between the current noise peak value and the current noise average value. If the initial noise average value is not greater than the current noise average value and the difference is greater than the third preset value, return to the step of adjusting the motor speed and continue to execute until the difference is not greater than the third preset value, and stop adjusting the motor speed.

6. The method according to claim 5, characterized in that, The adjustment of motor speed includes: In the initial adjustment, the motor speed is increased according to the first adjustment value; In cases where the initial noise peak value is not greater than the current noise peak value, the motor speed is increased according to the second adjustment value. In cases where the initial noise peak value is less than the current noise peak value, the motor speed is increased according to a third adjustment value; both the first adjustment value and the second adjustment value are greater than the third adjustment value.

7. The method according to claim 2, characterized in that, The step of performing corresponding fault handling operations based on the fault type of the fan coil unit in the fault detection results includes: When the fault type of the fan coil unit includes the ventilation noise fault and the mechanical noise fault, a first difference and a second difference are obtained; the first difference is the difference between the average sound pressure level and the largest sound pressure level in the frequency band corresponding to the fault type of ventilation noise fault; the second difference is the difference between the average sound pressure level and the largest sound pressure level in the frequency band corresponding to the fault type of mechanical noise fault. Based on the first difference and the second difference, the priority of fault handling is determined; Perform the corresponding fault handling operations according to the stated priority.

8. A fault handling device, characterized in that, The apparatus, applied to the fault handling method according to any one of claims 1 to 7, comprises: The spectrum information acquisition module is used to acquire spectrum information; The fault detection result acquisition module is used to perform fault analysis on the fan coil unit based on the spectrum information and obtain fault detection results; The fault handling operation execution module is used to perform corresponding fault handling operations according to the fault type of the fan coil unit in the fault detection results when the fault detection results include the fault of the fan coil unit and the fault is controllable; the fault type includes at least one of ventilation noise fault or mechanical noise fault.

9. A fan coil unit, characterized in that, It includes a memory and a processor, the memory storing a computer program, and the processor executing the computer program to implement the steps of the fault handling method according to any one of claims 1 to 7.

10. A temperature regulating device, characterized in that, Includes the fan coil unit as described in claim 9.

11. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the steps of the fault handling method according to any one of claims 1 to 7.

12. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by the processor, it implements the steps of the fault handling method according to any one of claims 1 to 7.

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