Fan control method and device, ventilation equipment and computer readable storage medium

Abstract

The application discloses a fan control method and device, ventilation equipment and a computer readable storage medium. The method is applied to the ventilation equipment, the ventilation equipment comprises at least two fans, and the method comprises the following steps: if it is detected that a first fan fails, the rotating direction and rotating speed of the first fan are acquired; the target rotating speed is determined according to the rotating direction and the rotating speed; the second fan is reduced to the target rotating speed, and the first fan is restarted. The application can improve the stability of air conditioner operation.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of fan control, and in particular to a fan control method, a fan control device, a ventilation equipment and a computer readable storage medium. BACKGROUND

[0002] Multi-split air conditioners mostly adopt top-outlet type double-fan air guide, two fans are arranged side by side on the ventilation pipeline, the back faces of the two fans are towards the same narrow public space, when the two fans are running simultaneously, the air inlet direction and the air outlet direction are consistent, which can provide a larger fan and a larger air outlet area. However, when one of the two fans stops due to failure, and the other fan is running at high speed, the high-speed airflow generated by the other fan will push the failed fan to reverse (opposite to the rotation direction of the fan in normal operation), which increases the difficulty of restarting the failed fan. In the related art, the normally running fan is stopped, and the failed fan is restarted after waiting for 3 minutes, which affects the stability of the air conditioner operation. SUMMARY

[0003] Embodiments of the present application provide a fan control method, a fan control device, a ventilation equipment and a computer readable storage medium, which aims to improve the stability of air conditioner operation.

[0004] In a first aspect, embodiments of the present application provide a fan control method applied to a ventilation equipment, the ventilation equipment comprising at least two fans, the fan control method comprising:

[0005] if it is detected that a first fan fails, obtaining a rotation direction and a rotation speed of the first fan;

[0006] determining a target rotation speed according to the rotation direction and the rotation speed;

[0007] reducing a second fan to the target rotation speed, and controlling the first fan to restart.

[0008] Optionally, the obtaining of the rotation direction and the rotation speed of the first fan comprises:

[0009] obtaining a first phase current signal and a second phase current signal of the first fan;

[0010] determining the rotation direction according to a phase difference between the first phase current signal and the second phase current signal;

[0011] determining the rotation speed according to a frequency and an amplitude of the first phase current signal, or a frequency and an amplitude of the second phase current signal.

[0012] Optionally, after the controlling of the first fan to restart, the fan control method further comprises:

[0013] If the first fan fails to restart, a target speed-down value is determined according to a difference interval between the target rotating speed and a preset rotating speed and a preset ratio relationship;

[0014] The target rotating speed is updated according to the target speed-down value, and the control of the second fan to speed down to the target rotating speed and the control of the first fan to restart are re-executed based on the updated target rotating speed;

[0015] Until the first fan successfully restarts or the number of restarts of the first fan is greater than or equal to a first preset number.

[0016] Optionally, the method further comprises:

[0017] If the number of restarts of the first fan is greater than or equal to the first preset number, a rotating influence factor of the second fan on the first fan is determined according to the rotating direction, the rotating speed, and a real-time rotating speed of the second fan when the first fan fails;

[0018] A target reverse rotating speed of the second fan is determined according to the rotating influence factor and a preset initial restart rotating speed of the first fan;

[0019] The second fan is controlled to rotate according to a preset reverse rotating direction and the target reverse rotating speed, and the first fan is controlled to restart.

[0020] Optionally, after the control of the second fan to adjust to the target rotating speed and the control of the first fan to restart, the method comprises:

[0021] If the first fan successfully starts, a real-time rotating speed of the second fan is obtained, and the first fan is controlled to speed up from an initial rotating speed to the real-time rotating speed;

[0022] The first fan and the second fan are controlled to synchronously speed up from the real-time rotating speed to a working rotating speed.

[0023] Optionally, before the control of the first fan to speed up from the initial rotating speed to the real-time rotating speed, the method further comprises:

[0024] A rotating speed difference between the first fan and the second fan is obtained;

[0025] If the rotating speed difference is greater than a preset rotating speed difference, a fault detection is performed on the first fan or the second fan;

[0026] If no fault of the first fan or the second fan is detected, an intermediate rotating speed is determined according to the rotating speed difference;

[0027] controlling a first target fan with the highest steering speed among the first fan and the second fan to reduce speed to the intermediate steering speed, and controlling a second target fan with the lowest steering speed among the first fan and the second fan to increase speed to the intermediate steering speed;

[0028] controlling the first fan and the second fan to gradually increase speed from the intermediate steering speed to a working rotation speed.

[0029] Optionally, the determining the target rotation speed according to the rotation direction and the rotation speed comprises:

[0030] detecting a fault type of the first fan;

[0031] determining a restart difficulty of the first fan according to the fault type;

[0032] if the restart difficulty is lower than a preset difficulty threshold, determining the target rotation speed according to the fault type, the rotation direction and the rotation speed.

[0033] In a second aspect, an embodiment of the present application provides a fan control device applied to a ventilation device, wherein the ventilation device comprises at least two fans, and the fan control device comprises:

[0034] an acquisition module, configured to acquire a rotation direction and a rotation speed of a first fan if it is detected that the first fan has a fault;

[0035] a determination module, configured to determine a target rotation speed according to the rotation direction and the rotation speed;

[0036] a control module, configured to control a second fan to reduce speed to the target rotation speed, and control the first fan to restart.

[0037] In a third aspect, an embodiment of the present application further provides a ventilation device comprising a processor and a memory, wherein the memory stores a computer program, and when the computer program is executed by the processor, the processor is caused to execute steps of any one of the fan control methods provided by the embodiments of the present application.

[0038] In a fourth aspect, an embodiment of the present application further provides a computer readable storage medium, which comprises a computer program, and when the computer program is run on an electronic device, the computer program is used to cause the electronic device to execute steps of any one of the fan control methods provided by the embodiments of the present application.

[0039] The fan control method is applied to a ventilation device, and the ventilation device comprises at least two fans. The fan control method comprises the following steps: if it is detected that a first fan fails, the rotating direction and rotating speed of the first fan are obtained; the target rotating speed is determined according to the rotating direction and the rotating speed; the second fan is reduced to the target rotating speed, and the first fan is restarted. In this way, before the first fan is restarted after failure, the reverse rotation intensity of the first fan caused by the airflow driven by the non-failed fan during operation can be determined according to the rotating direction and the rotating speed of the first fan after failure, and then the second fan is accurately reduced to the target rotating speed, so that the additional restarting load of the first fan caused by the airflow driven by the second fan can be avoided, and the unnecessary influence of the second fan on the operation effect of the second fan during the restarting of the failed fan can also be avoided. Therefore, the influence of the restarting of the failed fan on the operation effect of the other fan can be reduced, and the stability of the air conditioner operation can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0040] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0041] Figure 1 is a flowchart of one embodiment of the fan control method provided in the embodiments of the present application;

[0042] Figure 2 is a flowchart of another embodiment of the fan control method provided in the embodiments of the present application;

[0043] Figure 3 is a structural schematic diagram of a first ventilation device provided in the embodiments of the present application;

[0044] Figure 4 is a structural schematic diagram of a second ventilation device provided in the embodiments of the present application;

[0045] Figure 5 is a structural schematic diagram of an air conditioner circuit structure provided in the embodiments of the present application;

[0046] Figure 6 is a structural schematic diagram of a fan control device provided in the embodiments of the present application;

[0047] Figure 7 is a structural schematic diagram of a ventilation device provided in the embodiments of the present application. DETAILED DESCRIPTION

[0048] With reference to the accompanying drawings, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments of the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application. Meanwhile, in the description of the embodiments of the present application, the terms "first", "second", etc. are only used for distinguishing description, and cannot be understood as indicating or implying relative importance. Therefore, the features with "first" and "second" can be explicitly or implicitly included one or more features. In the description of the embodiments of the present application, the meaning of "multiple" is two or more than two, unless otherwise specifically limited.

[0049] The embodiments of the present application provide a fan control method and device, a ventilation equipment and a computer readable storage medium.

[0050] Specifically, the embodiments will be described from the perspective of a fan control device, which can be integrated in a ventilation equipment, i.e. the fan control method of the embodiments of the present application can be executed by the ventilation equipment. Alternatively, the ventilation equipment can be a multi-fan on-line, a multi-fan air conditioner or a multi-connected air conditioner with multiple fans, etc.

[0051] The embodiments will be described in detail below with reference to the accompanying drawings. In the embodiments, the execution subject is taken as an example of a ventilation equipment. It should be noted that the description order of the following embodiments is not limited as the preferred order of the embodiments. Although the logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown in the drawings.

[0052] According to the background art description, in order to reduce the difficulty of restarting the failed fan in the top-out air type double-fan ventilation equipment, in the related art, the normally operating fan is first stopped, and after waiting for 3 minutes, the failed fan is restarted, but this affects the stability of the operation of the non-failed air conditioner.

[0053] In order to solve the above problems, the present application discloses a fan control method, please refer to Figure 1 The specific process of the fan control method can be as follows: steps S10-S30, wherein:

[0054] Step S10, if it is detected that the first fan fails, the rotating direction and rotating speed of the first fan are obtained;

[0055] In the embodiment, the fan control method is applied to a ventilation device having at least two fans, including a first fan and a second fan. Such a ventilation device with multiple fans is common in a multi-split air conditioner, for example, a multi-split air conditioner with a top-out double fan, to bring out the airflow after heat exchange. The ventilation device also has a wind cavity corresponding to at least two fans, i.e., the first fan and the second fan. When the first fan and the second fan are normally running, the air inlet side of the first fan and the air inlet side of the second fan are directed to the same wind cavity. For example, referring to Figure 3 , the first fan and the second fan can be arranged horizontally, the fan blades of the fans are located in the same plane, and the air inlet directions are consistent when normally running, or referring to Figure 4 , the first fan and the second fan can be arranged vertically, the fan blades of the fans are not located in the same plane, and are parallel to each other, and the air inlet directions are opposite when normally running. In these examples, the first fan and the second fan do not have a direct relationship between the air inlet directions when normally running, but have the same point that the air inlet sides of both are directed to the same wind cavity when normally running.

[0056] Referring to Figure 3 or Figure 4 , the wind cavity is not necessarily closed except for the fan position, but due to the limited volume of the wind cavity, the positions of the first fan and the second fan are close to each other. When the two fans are normally running, the air inlet of both is from the same public space, so that there is a competitive relationship between the two when the air is inhaled. The flow direction of the high-speed airflow generated by the second fan when passing through the first fan is opposite to the airflow direction that the first fan can generate when normally running. The force exerted by the airflow generated by the second fan on the fan blades of the first fan is opposite to the direction of the force driving the fan blades by the motor of the first fan when normally running. The normal running of the first fan and the second fan increases the rotational load of the other party. When the first fan fails due to external disturbance, sudden change of operating load, or abnormal operation of the fan corresponding motor, etc., the first fan corresponding motor does not provide power to the fan blades of the first fan to actively rotate. However, if the second fan is normally running at this time, the high-speed airflow generated by the second fan can provide power to the fan blades of the first fan to passively rotate the stopped first fan. The force exerted by the high-speed airflow generated by the second fan on the fan blades of the first fan is opposite to the direction of the force driving the fan blades by the motor of the first fan when normally running, so that the reverse rotation of the first fan is opposite to the direction of rotation when normally running. The rotation direction opposite to the rotation direction of the first fan or the second fan when normally running is called reverse rotation.

[0057] After the first fan fails to stop, it needs to be restarted, but the reverse rotation of the first fan will also exert a force on the motor, and this force will be opposite to the driving force of the motor, bringing additional restart load to the motor of the first fan, increasing the difficulty of restarting the first fan. Therefore, it is necessary to reduce the rotation speed of the second fan to reduce the reverse rotation trend of the first fan. However, after reducing the rotation speed of the second fan, the running effect of the second fan will be affected, so it is necessary to balance the requirements of the difficulty of restarting the first fan and the running effect of the second fan. Further, the embodiment proposes to accurately reduce the rotation speed of the second fan to reduce the difficulty of restarting the first fan while retaining the rotation speed of the fan to a greater extent to improve the stability of the air conditioner. Based on this, it is detected whether the first fan fails. If the first fan fails, it is highly probable that the motor of the first fan cannot provide power to the fan blades of the first fan. Alternatively, it can be determined whether the first fan fails according to the running state of the motor of the first fan. If the motor of the first fan stops running without receiving a stop command, it can be determined that the first fan has failed.

[0058] If it is detected that the first fan fails, the motor of the first fan can not be able to provide power to it, and if the fan blades of the first fan are still rotating, it is likely that the airflow caused by the operation of the second fan has caused the fan blades of the first fan to reverse. However, after the first fan fails, it can not have completely stopped due to a short failure time or other reasons, and it can not have started to reverse, so it is necessary to obtain the rotation direction and rotation speed of the failed first fan. The rotation direction is the direction of rotation of the fan blades of the first fan, and the rotation speed is the speed of rotation of the fan blades of the first fan. The rotation direction and rotation speed can be obtained when the first fan has stabilized after a predetermined time after the first fan fails.

[0059] Step S20, determining a target rotation speed according to the rotation direction and the rotation speed;

[0060] In the embodiment, the rotation direction can represent whether the first fan is reversed, and the rotation speed can represent the rotation intensity of the fan blade of the first fan, i.e., the force condition of the first fan. If the rotation direction represents that the first fan is being reversed, and the greater the rotation speed is, the greater the force exerted by the airflow driven by the second fan on the fan blade of the first fan is, the greater the rotation speed of the reversed first fan is, and the greater the difficulty of restarting the first fan is. Thus, if the rotation direction is the rotation direction of the first fan in normal operation or no rotation, i.e., the first fan is not reversed, at this time, the airflow driven by the second fan cannot exert enough force on the fan blade of the first fan to reverse it, which indicates that due to the too small current rotation of the second fan or the too large distance between the second fan and the first fan, the load caused by the second fan on the first fan is too small to be ignored, the current rotation speed of the second fan can be maintained, the target rotation speed does not need to be determined, and the first fan is controlled to restart without changing the current rotation speed of the first fan.

[0061] If the rotation direction is the rotation direction opposite to the rotation direction of the first fan in normal operation, i.e., reversed, it indicates that the current rotation speed of the second fan is too large, the force exerted by the airflow driven by the second fan on the fan blade of the first fan is large enough to reverse the second fan, the load caused by the second fan on the first fan cannot be ignored, and the reversal of the first fan also generates a restart load for the first fan. Thus, the rotation speed of the second fan needs to be reduced to stop the reversal of the first fan, so as to restart the first fan. The rotation speed of the first fan can determine the reversal intensity of the first fan, and also represent the influence of the too high rotation speed of the second fan on the first fan. The first fan can be reversely rotated at different rotation speeds, the second fan needs to be at a target rotation speed corresponding to each rotation speed of the first fan to eliminate the reversal trend of the first fan, the rotation speed of the first fan is reduced to a rotation speed that does not affect the restart, for example, 0 r / s, a preset corresponding relationship between the rotation speed and the target rotation speed is obtained, the target rotation speed of the second fan corresponding to the current rotation speed of the first fan is determined according to the preset corresponding relationship. The first fan can also be reversely rotated at different rotation speeds, the second fan needs to be reduced by a rotation speed value corresponding to each rotation speed of the first fan to eliminate the reversal trend of the first fan, the rotation speed of the first fan is reduced to a rotation speed that does not affect the restart, and then a preset corresponding relationship between the rotation speed and the rotation speed value to be reduced is obtained, the rotation speed value to be reduced of the second fan corresponding to the current rotation speed of the first fan is determined according to the preset corresponding relationship, and the target rotation speed is determined according to the current rotation speed and the rotation speed value to be reduced of the second fan.

[0062] In step S30, the second fan is reduced to the target rotation speed, and the first fan is controlled to restart.

[0063] In the embodiment, if it is determined that the first fan is reversed according to the rotating direction, the target rotating speed is determined to be less than the current rotating speed of the second fan because the rotating speed of the second fan is too high. The second fan is controlled to slow down to the target rotating speed, so that the reverse trend of the first fan is eliminated, the reverse rotating speed of the first fan is reduced to a rotating speed that does not affect the restart, the normal operation of the second fan will not affect the restart of the first fan, and the first fan is controlled to restart. At this time, starting the first fan will increase the probability of successful restart of the first fan, that is, the operation effect of the second fan is maximally retained, and the restart effect of the first fan is improved.

[0064] In the technical solution disclosed in the embodiment, if it is detected that the first fan fails, the rotating direction and the rotating speed of the first fan are acquired, the target rotating speed is determined according to the rotating direction and the rotating speed, the second fan is slowed down to the target rotating speed, and the first fan is controlled to restart. In this way, before the first fan fails and restarts, the reverse intensity of the first fan caused by the airflow generated by the non-failed fan during the operation of the first fan is determined according to the rotating direction and the rotating speed of the first fan after the failure and the stop, and the second fan is accurately slowed down to the target rotating speed, that is, the additional restart load of the first fan caused by the airflow generated by the second fan can be avoided, and the unnecessary influence of the over-slowing down of the second fan on the operation effect of the second fan during the restart of the first fan can also be avoided. In this way, the restart demand of the first fan and the operation effect demand of the second fan are balanced, the influence of the restart of the failed fan on the operation effect of the other fan is reduced, and the success rate of the restart of the first fan is improved, so that the stability of the operation of the air conditioner is improved.

[0065] Further, the rotating direction and the rotating speed of the first fan are acquired by:

[0066] The first phase current signal and the second phase current signal of the first fan are acquired.

[0067] The rotating direction is determined according to the phase relationship between the first phase current signal and the second phase current signal.

[0068] The rotating speed is determined according to the frequency and the amplitude of the first phase current signal or the frequency and the amplitude of the second phase current signal.

[0069] In this embodiment, the rotation direction or speed of the first or second fan can be obtained through measurement. Besides directly using a speed detection device to measure the fan's rotation direction or speed, a current sampling module can also be used to collect the phase current signal of the fan, and the rotation direction or speed can be determined using this phase current signal. The fan is driven by a motor, which is generally driven by alternating current (AC). The motor is connected to multi-phase motor leads, through which AC current can be transmitted to drive the motor and make the fan blades rotate. If the fan blades rotate, different phases of AC current will pass through each phase of the motor leads. The AC current passing through each phase of the motor leads can be called the phase current. The phase current signals of any two phases of the motor leads connected to the fan's motor are collected and used as the first phase current signal and the second phase current signal.

[0070] by Figure 5 Taking a multi-split air conditioner as an example, this multi-split air conditioner includes a fan control device, which can be a DSP control unit. The DSP unit can control fans 1 and 2 in the ventilation equipment, and also control the compressor of the multi-split air conditioner. Specifically, the DSP unit controls the inverter circuit modules corresponding to the compressor, fan 1, and fan 2 through 6 PWM signals. Each inverter module circuit feeds back the motor fault signal Fo to the DSP to determine whether the compressor, fan 1, and fan 2 have malfunctioned. Each inverter module circuit also converts DC power to AC power, which drives the motor of the compressor, fan 1, or fan 2 through the three-phase motor leads of U-phase, W-phase, and V-phase. Current flows through the three motor leads of U-phase, W-phase, and V-phase, representing the three phases of the AC power supply. The current in the three motor leads of U-phase, W-phase, and V-phase can be called phase current. The current sampling module can be connected to the port of each phase motor lead in the inverter module circuit to sample the phase current in each motor lead. For example, the phase currents in the U-phase and V-phase motor leads can be sampled using a current sampling module to obtain the phase current signals of both phases. The phase current signal corresponding to the phase current flowing through the U-phase motor lead can be called the first phase current signal, and the phase current signal corresponding to the phase current flowing through the V-phase motor lead can be called the second phase current signal.

[0071] During the rotation of the fan blades of the first fan, there will be phase current passing through the motor lead of the first fan, and the corresponding phase current signal is generally a sine wave. When the first fan is running normally, the alternating current power supply will apply voltage to the motor, so that there is current from the power supply to the motor in each phase motor lead. When the first fan reverses, the motor of the fan acts as a generator, and current flows out of the motor in each phase motor lead. Due to the different directions of current in the motor lead, the phase current signals in each phase motor lead change, and this change can be determined by comparing the phase difference between at least two phase current signals. By comparing the phase difference between the first phase current signal and the second phase current signal with the preset phase difference, the rotation direction of the fan blades can be determined. The preset phase difference is determined in advance based on experiments or theory, and is the signal phase difference between the first phase current signal corresponding to the first motor lead and the second phase current signal of the first motor lead when the fan is running forward or reverse. Generally, when the fan is running normally, the preset phase difference is that the U-phase current signal exceeds the V-phase current signal by 120°. Therefore, the U-phase current signal is obtained as the first phase current signal, and the V-phase current signal is obtained as the second phase current signal in the t period. If the phase difference between the first phase current signal and the second phase current signal is that the first phase current signal exceeds the second phase current signal by 120°, then the fan is running normally in the t period. Conversely, if the phase difference between the first phase current signal and the second phase current signal is that the second phase current signal exceeds the first phase current signal by 120°, then the fan is reversing in the t period.

[0072] Based on the phase difference between the first phase current signal and the second phase current signal, the rotation direction of the fan can be determined. When the rotation speed of the fan is faster, whether it is running forward or reverse, the frequency and amplitude of the alternating current in the motor lead of the fan are higher, and the rotation speed of the fan is greater. The frequency and amplitude of different phase current signals are generally the same. Based on the frequency and amplitude of at least one phase current signal of the fan and a pre-designed calculation formula, the rotation speed of the fan can be determined.

[0073] In this way, by sampling the first phase current signal and the second phase current signal of the first fan, the rotation direction and rotation speed of the first fan can be quickly determined, the determination efficiency and accuracy can be improved, the success rate of restarting the first fan can be improved, the influence on the operation of the second fan can be reduced, and the stability of the air conditioner operation can be improved. Moreover, the sampling cost is low, and the hardware of the ventilation equipment needs to be changed little, so the production cost of the ventilation equipment and the air conditioner installed with the ventilation equipment can be reduced.

[0074] Further, after controlling the second fan to adjust to the target rotation speed and controlling the first fan to restart, the method further comprises:

[0075] If the first fan is successfully started, the real-time rotating speed of the second fan is obtained, and the first fan is controlled to accelerate from the initial rotating speed to the real-time rotating speed.

[0076] The first fan and the second fan are controlled to synchronously accelerate from the real-time rotating speed to a working rotating speed.

[0077] In the embodiment, after the second fan is decelerated to the target rotating speed, the restart success rate of the first fan can be improved. If the first fan is successfully restarted, the first fan runs at the initial rotating speed, which is the initial speed when the fan is started. At this time, the second fan runs at the target rotating speed or a speed lower than the target rotating speed. Both the first fan and the second fan need to accelerate to the working rotating speed when the fan is normally working. In order to balance the load brought by the first fan and the second fan to each other, the first fan needs to be controlled to accelerate from the initial rotating speed to the target rotating speed, so that the rotating speeds of the first fan and the second fan are the same. Then, the first fan and the second fan are controlled to synchronously accelerate from the real-time rotating speed to the working rotating speed. For example, if the first fan and the second fan need to accelerate from the real-time rotating speed to the working rotating speed within a preset time period, the preset time period can be divided into a plurality of sub time periods. The initial time of the preset time period is the real-time rotating speed, and the end time is the working rotating speed. The rotating speed corresponding to each sub time period is determined according to the real-time rotating speed and the working rotating speed. The rotating speed corresponding to the next sub time period is greater than the rotating speed corresponding to the previous sub time period. The first fan and the second fan are controlled to run according to the rotating speed corresponding to the current sub time period, so that the acceleration can be realized gradually.

[0078] Optionally, the highest rotating speed of the first fan before the failure can be obtained. If the highest rotating speed is lower than the working rotating speed, the working rotating speed needs to be adjusted. For example, the highest rotating speed-50 RPM is taken as the working rotating speed, or the initial working rotating speed-50 RPM is taken as the new working rotating speed. The failure of the first fan during the acceleration to the working rotating speed can be avoided, and the stability of the air conditioner can be improved.

[0079] In this way, the first fan after the restart is accelerated to the same real-time rotating speed as the second fan running at the real-time rotating speed, and then the first fan and the second fan are synchronously gradually accelerated to the working rotating speed, so that the rotating speed difference between the first fan and the second fan is small, the load caused by each other can be balanced, the failure of the fan with a small rotating speed caused by the load of the fan with a large rotating speed can be avoided, the first fan and the second fan can be safely accelerated to the working rotating speed, and the running effect of the fan can be improved.

[0080] Further, before the rotation direction and rotation speed of the first fan are acquired if the first fan is detected to be faulty, the method further comprises:

[0081] acquiring a rotation speed difference between the first fan and the second fan;

[0082] if the rotation speed difference is greater than a preset rotation speed difference, performing a fault detection on the first fan or the second fan;

[0083] if the first fan or the second fan is not detected to be faulty, determining an intermediate rotation speed according to the rotation speed difference;

[0084] controlling a first target fan with the highest rotation speed among the first fan and the second fan to slow down to the intermediate rotation speed, and controlling a second target fan with the lowest rotation speed among the first fan and the second fan to speed up to the intermediate rotation speed;

[0085] controlling the first fan and the second fan to gradually speed up from the intermediate rotation speed to a working rotation speed synchronously.

[0086] In the embodiment, the rotation speed difference between the first fan and the second fan should not be too large. The rotation speed difference refers to the numerical difference of the rotation speeds between the first fan and the second fan. Before the first fan is faulty, the first fan and the second fan are normally operated. Here, the rotation speed difference generally refers to the difference of the rotation speeds when the first fan and the second fan are normally operated. When the first fan and the second fan are normally operated, if the rotation speed difference between the first fan and the second fan is too large, the rotation load between the first fan and the second fan is unbalanced, which is easy to cause the fan with the lower rotation speed to be faulty. Therefore, the rotation speed difference between the first fan and the second fan needs to be controlled.

[0087] The speed difference between the first fan and the second fan can be monitored in real time. If the speed difference is greater than a preset speed difference, the fan has a risk of failure, and then the first fan or the second fan can be detected for failure. If it is detected that the fan has a risk of failure, the fan with failure is taken as the first fan, and step S10 is performed. If it is not detected that the first fan or the second fan has a failure, the speed difference needs to be controlled to avoid a failure after continuous operation. According to the speed difference, the real-time rotating speed of the first fan, and the real-time rotating speed of the second fan, an intermediate rotating speed is determined. The intermediate rotating speed is a rotating speed in a corresponding interval of the real-time rotating speed of the first fan and the real-time rotating speed of the second fan, and can be an average of the real-time rotating speed of the first fan and the real-time rotating speed of the second fan. The first target fan with the highest rotating speed among the first fan and the second fan is controlled to reduce speed to the intermediate rotating speed, and the second target fan with the lowest rotating speed among the first fan and the second fan is controlled to increase speed to the intermediate rotating speed, so as to control the rotating speeds of the first fan and the second fan in the same state in turn, and then the first fan and the second fan are controlled to gradually increase speed from the intermediate rotating speed to the working rotating speed synchronously, so as to control the speed difference between the two fans in a subsequent operation process.

[0088] In this way, when the speed difference between the first fan and the second fan is large and no failure has occurred, the high-speed rotating fan is reduced in speed, and the low-speed rotating fan is increased in speed, so as to reduce the speed difference between the two fans, and control the two fans to gradually increase speed to the working rotating speed at the same rotating speed, control the speed difference between the two fans in a subsequent operation process, reduce the failure probability, and further improve the fan operation effect.

[0089] Optionally, with reference to any one of the above embodiments, in another embodiment of the fan control method of the application, after step S30, the method further comprises: Figure 2

[0090] In step S40, if the first fan fails to restart, a target speed reduction value is determined according to a difference interval of the target rotating speed and the preset rotating speed, and a preset ratio relationship.

[0091] ​In the embodiment, after detecting that the first fan fails, the second fan is reduced to the target rotating speed, which can improve the success rate of restarting the first fan, but the first fan can still fail. If the first fan fails to restart, it can be that the second fan is reduced to the target rotating speed and the influence of the reverse rotation of the first fan on the restart is not completely eliminated, so the rotating speed of the second fan can be further reduced to try to restart the first fan again. After the rotating direction and the rotating speed of the first fan are used to reduce the second fan to the target rotating speed, it is difficult to further determine a more accurate rotating speed of the second fan that can eliminate the influence of the reverse rotation, so it is necessary to start from the target rotating speed and gradually reduce the rotating speed to approach the preset rotating speed that is the lowest requirement for the second fan. The step length of the gradual reduction is the target reduction value, which can be determined according to the difference interval between the target rotating speed and the preset rotating speed and a preset ratio relationship, and the rotating speed of the second fan is always not reduced to the preset rotating speed that is the lowest, so as to reserve the operation effect of the second fan.

[0092] In step S50, the target rotating speed is updated according to the target reduction value, and the control of reducing the second fan to the target rotating speed and the control of restarting the first fan are performed again based on the updated target rotating speed.

[0093] Until the first fan restarts successfully or the number of restarts of the first fan is greater than or equal to the preset number of times.

[0094] In the embodiment, the target rotating speed is updated according to the target reduction value, that is, the updated target rotating speed is equal to the original target rotating speed minus the target reduction value, and the updated target rotating speed is smaller than the original target rotating speed. The step S30 is performed again based on the updated target rotating speed, which is substantially that when the second fan operates at the original target rotating speed, the first fan is restarted and the second fan is controlled to be reduced by the target reduction value to operate at the updated target rotating speed. The rotating speed of the second fan is lower, and the rotating load on the first fan is smaller, so the first fan can be tried to restart. If the first fan still fails to restart, the step S40 is performed again until the first fan restarts successfully or the number of restarts of the first fan is greater than or equal to the first preset number of times.

[0095] In the technical solution disclosed in the embodiment, after the second fan is reduced in speed to the target rotating speed determined according to the rotating direction and the rotating speed, if the first fan still fails to restart, the second fan is controlled to continue to be gradually reduced in speed to approach the preset rotating speed, and in each speed reduction process, the first fan is attempted to restart until the first fan successfully restarts or the number of restarts is greater than or equal to the first preset number. In this way, on one hand, the success rate of the first fan to restart can be improved, and the operation effect of the second fan is ensured, and the overall operation effect of the two fans can be improved. On the other hand, the rotating speed of the second fan is gradually reduced to attempt to restart the faulty fan, which starts from the target rotating speed determined according to the rotating direction and the rotating speed, rather than the rotating speed of the second fan when the fault occurs. In this way, the efficiency of gradually reducing the speed to attempt to restart the faulty fan is improved, and the restart time is shortened.

[0096] Further, the method further comprises:

[0097] If the number of restarts of the first fan is greater than or equal to the first preset number, a rotating influence factor of the second fan on the first fan is determined according to the rotating direction, the rotating speed, and the real-time rotating speed of the second fan when the first fan is faulty.

[0098] A target reverse rotating speed of the second fan is determined according to the rotating influence factor and a preset initial speed of the first fan.

[0099] The second fan is controlled to rotate according to the preset reverse rotating direction and the target reverse rotating speed, and the first fan is controlled to restart.

[0100] If the number of restarts of the first fan is greater than or equal to the first preset number, the second fan is controlled to rotate according to the preset reverse rotating direction and the preset target reverse rotating speed, and the first fan is controlled to restart.

[0101] In the embodiment, if the number of restarts of the first fan is greater than or equal to the first preset number, that is, the first fan still fails to restart after being reduced in speed of the second fan for multiple times, the first fan can be restarted by controlling the second fan to reverse to provide assistance for the first fan to restart, so as to improve the success rate of the first fan to restart. The second fan is controlled to reverse according to the preset reverse rotating direction and the preset target reverse rotating speed. When the second fan reverses, assistance can be provided for the first fan to rotate forward, the first fan can be driven to rotate forward, and a preset initial rotating degree can be provided for the first fan to restart, so that the first fan is more likely to restart.

[0102] Specifically, if the number of restarts of the first fan is greater than or equal to the first preset number, the reverse rotation speed of the first fan when the first fan is reversed after a failure is determined according to the rotation direction and the rotation speed of the first fan, and the real-time rotation speed of the second fan when the first fan fails is obtained. Since the second fan normally operates at the real-time rotation speed, the first fan is reversed at the reverse rotation speed, and therefore the rotation influence factor W (W1, W2,...) of the first fan on the first fan can be determined according to the reverse rotation speed R of the first fan and the real-time rotation speed r0 of the second fan when the first fan fails. Wherein, R = Wr0. Conversely, if the first fan is to be restarted by reversing the second fan to make the first fan rotate forward to reach the preset restart initial rotation speed to provide an initial speed for restarting, the target reverse rotation speed of the second fan can be determined according to the rotation influence factor of the second fan on the first fan and the preset restart initial rotation speed. Then, the second fan is controlled to rotate in the reverse direction and at the target reverse rotation speed, so that the first fan that has failed rotates forward at the preset restart initial rotation speed, providing an initial speed for restarting the first fan, and the difficulty of restarting the first fan can be reduced.

[0103] Optionally, if the first fan fails to be restarted by reversing the second fan, the target reverse rotation speed can be updated according to a preset speed-up value, and the second fan is controlled to rotate in the reverse direction and at the updated target reverse rotation speed, and the first fan is restarted, until the first fan is successfully restarted or the number of restarts of the first fan is greater than or equal to a second preset number.

[0104] In this way, by controlling the second fan to rotate in the reverse direction and at the target reverse rotation speed, the first fan is made to rotate forward at the preset restart initial rotation speed, and an additional initial speed is added to the first fan for restarting. Compared with the method of restarting the first fan from a standstill to operation, the difficulty of restarting the first fan at the preset restart initial rotation speed is lower, the success rate of restarting the first fan is improved, and the stability of the air conditioner can be further improved.

[0105] Optionally, based on any of the above embodiments, in another embodiment of the fan control method of the application, the step S20 further comprises:

[0106] Step S21, detecting the failure type of the first fan;

[0107] Step S22, determining the difficulty of restarting the first fan according to the failure type;

[0108] Step S23, if the difficulty of restarting is lower than a preset difficulty threshold, determining the target rotation speed according to the failure type, the rotation direction and the rotation speed.

[0109] In the embodiment, the first fan sends different reasons for failure shutdown, and the difficulty of automatically restarting the fan based on a software algorithm is also different. For example, for a hardware failure such as a burned-out motor lead of the first fan, manual intervention is required, and it is difficult to restart successfully by adjusting the rotation speed of the second fan. For an occasional software bug, the hardware is not damaged, and the success rate of restarting is high by adjusting the rotation speed of the second fan to restart. Therefore, the fault type of the first fan can be detected first, the difficulty of restarting the first fan is determined according to the fault type, and if the difficulty of restarting is lower than a preset difficulty threshold, the first fan can be restarted by adjusting the rotation speed of the second fan. Further, the fault type is different, and the restarting load caused by the fault type is also different. If the restarting load caused by the fault type is high, the restarting load caused by the second fan should be lower, and the second fan needs to run at a lower rotation speed to reduce the restarting load caused by the second fan to the first fan and improve the success rate of restarting. Conversely, if the restarting load caused by the fault type is low, the restarting load caused by the second fan can be higher, and the second fan can run at a higher rotation speed to maximize the running effect of the second fan. Therefore, in addition to considering the rotation direction and the rotation direction of the first fan, the restarting load caused by the fault type should also be considered, and the target rotation speed of the second fan is determined by comprehensively considering the fault type, the rotation direction, and the rotation speed.

[0110] In this way, by considering the restarting difficulty and the restarting load of the fan self-restart caused by the fault type of the first fan, and combining the reverse effect determined according to the rotation direction and the rotation direction, a target rotation speed that can more accurately balance the success rate of restarting the first fan and the running effect of the second fan can be obtained, thereby further improving the stability of the air conditioner running.

[0111] The embodiment also provides a fan control device, which can be integrated in a ventilation device, and the ventilation device includes at least two fans. For example, as shown in Figure 6 The fan control device can include:

[0112] The acquisition module 1001 is configured to acquire the rotation direction and the rotation speed of the first fan if it is detected that the first fan fails.

[0113] The determination module 1002 is configured to determine a target rotation speed according to the rotation direction and the rotation speed.

[0114] The control module 1003 is configured to reduce the rotation speed of the second fan to the target rotation speed and control the first fan to restart.

[0115] Optionally, the acquisition module 1001 is further configured to:

[0116] acquire a first phase current signal and a second phase current signal of the first fan;

[0117] determine the rotation direction according to a phase difference between the first phase current signal and the second phase current signal;

[0118] determine the rotation speed according to a frequency and an amplitude of the first phase current signal, or a frequency and an amplitude of the second phase current signal.

[0119] Optionally, the control module 1003 is further configured to:

[0120] if the first fan fails to restart, determine a target speed-down value according to a difference interval between the target rotation speed and a preset rotation speed, and a preset ratio relationship;

[0121] update the target rotation speed according to the target speed-down value, and re-execute the control of the second fan to speed down to the target rotation speed and the control of the first fan to restart based on the updated target rotation speed;

[0122] until the first fan successfully restarts, or the number of restarts of the first fan is greater than or equal to a first preset number.

[0123] Optionally, the control module 1003 is further configured to:

[0124] if the number of restarts of the first fan is greater than or equal to the first preset number, determine a rotation influence factor of the second fan on the first fan according to the rotation direction, the rotation speed, and a real-time rotation speed of the second fan when the first fan fails;

[0125] determine a target reverse rotation speed of the second fan according to the rotation influence factor and a preset restart initial rotation speed of the first fan;

[0126] control the second fan to rotate according to a preset reverse rotation direction and the target reverse rotation speed, and control the first fan to restart.

[0127] Optionally, the control module 1003 is further configured to:

[0128] if the first fan successfully starts, acquire a real-time rotation speed of the second fan, and control the first fan to speed up from an initial rotation speed to the real-time rotation speed;

[0129] control the first fan and the second fan to synchronously speed up from the real-time rotation speed to a working rotation speed.

[0130] Optionally, the acquisition module 1001 is further configured to:

[0131] acquiring a speed difference between the first fan and the second fan;

[0132] if the speed difference is greater than a preset speed difference, performing fault detection on the first fan or the second fan;

[0133] if no fault of the first fan or the second fan is detected, determining an intermediate rotating speed according to the speed difference;

[0134] controlling a first target fan with the highest rotating speed among the first fan and the second fan to reduce speed to the intermediate rotating speed, and controlling a second target fan with the lowest rotating speed among the first fan and the second fan to increase speed to the intermediate rotating speed;

[0135] controlling the first fan and the second fan to gradually increase speed from the intermediate rotating speed to a working rotating speed.

[0136] Optionally, the determining module 1002 is further configured to:

[0137] detecting a fault type of the first fan;

[0138] determining a restarting difficulty of the first fan according to the fault type;

[0139] if the restarting difficulty is lower than a preset difficulty threshold, determining the target rotating speed according to the fault type, the rotating direction and the rotating speed.

[0140] In this embodiment, before the first fan is restarted after a fault, the reverse rotation intensity of the first fan caused by the airflow generated by the non-fault fan can be determined according to the rotating direction and the rotating speed of the first fan after the fault, and then the second fan can be accurately reduced to the target rotating speed, so as to avoid the additional restarting load of the first fan caused by the airflow generated by the second fan, and also to avoid the unnecessary influence on the operation effect of the second fan caused by the excessive speed reduction of the second fan during the restarting of the fault fan. Thus, the influence of the restarting of the fault fan on the operation effect of the other fan can be reduced, and the stability of the air conditioner can be improved.

[0141] As shown in FIG. 1, Figure 7 the air conditioner 100 comprises a first fan 101, a second fan 102, a third fan 103 and a fourth fan 104. Figure 7This is a schematic diagram of a ventilation device provided in an embodiment of the present invention. The ventilation device 1100 includes a processor 1101 with one or more processing cores, a memory 1102 with one or more computer-readable storage media, and a computer program stored in the memory 1102 and executable on the processor. The processor 1101 and the memory 1102 are electrically connected. Those skilled in the art will understand that the ventilation device structure shown in the figure does not constitute a limitation on the ventilation device, and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0142] The processor 1101 is the control center of the ventilation equipment 1100. It connects various parts of the ventilation equipment 1100 via various interfaces and lines. By running or loading software programs and / or units stored in the memory 1102, and by calling data stored in the memory 1102, it executes various functions of the ventilation equipment 1100 and processes data, thereby providing overall monitoring of the ventilation equipment 1100. The processor 1101 can be a CPU, GPU, network processor (NP), etc., and can implement or execute the methods, steps, and logic diagrams disclosed in the embodiments of this invention.

[0143] In this embodiment of the invention, the processor 1101 in the ventilation device 1100 loads the instructions corresponding to the processes of one or more application programs into the memory 1102 according to the following steps, and the processor 1101 runs the application programs stored in the memory 1102 to realize various functions, such as:

[0144] If a malfunction is detected in the first fan, the rotation direction and rotation speed of the first fan are obtained;

[0145] The target rotation speed is determined based on the rotation direction and the rotation speed;

[0146] The second fan is slowed down to the target rotation speed, and the first fan is restarted.

[0147] For details on the implementation of each of the above operations, please refer to the previous examples, which will not be repeated here.

[0148] Optional, such as Figure 7 As shown, the ventilation device 1100 also includes: a touch screen display 1103, a radio frequency circuit 1104, an audio circuit 1105, an input unit 1106, and a power supply 1107. The processor 1101 is electrically connected to the touch screen display 1103, the radio frequency circuit 1104, the audio circuit 1105, the input unit 1106, and the power supply 1107. Those skilled in the art will understand that... Figure 7The structure of the ventilation device shown in the figures is not intended to limit the ventilation device, and the ventilation device can include more or fewer components than shown, or combine certain components, or arrange different components.

[0149] The touch display screen 1103 can be used to display a graphical user interface and receive operation instructions generated by user acting on the graphical user interface. The touch display screen 1103 can include a display panel and a touch panel. The display panel can be used to display information input by the user or information provided to the user and various graphical user interfaces of the ventilation device, which can be composed of graphics, text, icons, videos and any combination thereof. Optionally, the display panel can be configured in the form of a liquid crystal display (LCD), an organic light-emitting diode (OLED), etc. The touch panel can be used to collect touch operations of the user thereon or adjacent thereto (such as operations of the user using a finger, a stylus or any suitable object or accessory on or adjacent to the touch panel), and generate corresponding operation instructions, and the operation instructions execute corresponding programs. Optionally, the touch panel can include two parts of a touch detection device and a touch controller. The touch detection device detects the touch position of the user and detects the signal brought by the touch operation, and transmits the signal to the touch controller; the touch controller receives the touch information from the touch detection device, and converts it into touch coordinates, and then sends it to the processor 1101, and can receive commands from the processor 1101 and execute them. The touch panel can cover the display panel, and when the touch panel detects a touch operation thereon or adjacent thereto, it transmits to the processor 1101 to determine the type of the touch event, and then the processor 1101 provides corresponding visual output on the display panel according to the type of the touch event. In the embodiments of the present application, the touch panel and the display panel can be integrated into the touch display screen 1103 to realize input and output functions. However, in some embodiments, the touch panel and the touch panel can realize input and output functions as two independent components. That is, the touch display screen 1103 can also realize input functions as part of the input unit 1106.

[0150] The radio frequency circuit 1104 can be used to transceive radio frequency signals to establish wireless communication with a network device or other ventilation device, and transceive signals between the network device or other ventilation device.

[0151] The audio circuit 1105 can be used to provide an audio interface between the user and the ventilation device through a speaker and a microphone. The audio circuit 1105 can convert received audio data into an electrical signal and transmit the electrical signal to the speaker for conversion into a sound signal output by the speaker. On the other hand, the microphone collects a sound signal and converts the sound signal into an electrical signal, which is received by the audio circuit 1105 and converted into audio data. The audio data is output to the processor 1101 for processing, and then transmitted to another ventilation device via the radio frequency circuit 1104, or output to the memory 1102 for further processing. The audio circuit 1105 can also include a headphone jack to provide communication between an external device and the ventilation device.

[0152] The input unit 1106 can be used to receive inputted numbers, character information or user feature information (e.g., fingerprint, iris, face information, etc.), and generate keyboard, mouse, joystick, optical or trackball signal inputs related to user settings and function control.

[0153] The power supply 1107 is used to supply power to various components of the ventilation device 1100. Optionally, the power supply 1107 can be logically connected to the processor 1101 through a power management system, so that the power management system can be used to manage charging, discharging and power consumption management, etc. The power supply 1107 can also include one or more DC or AC power sources, recharging systems, power failure detection circuits, power converters or inverters, power status indicators, etc.

[0154] Although Figure 7 The ventilation device 1100 can also include a camera, a sensor, a wireless fidelity module, a Bluetooth module, etc., which are not described here in detail.

[0155] In the above embodiments, the description of each embodiment focuses on different aspects, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0156] Those of ordinary skill in the art can understand that all or part of the steps of the various methods of the above embodiments can be completed by instructions, or by instructions controlling related hardware, which can be stored in a computer readable storage medium and loaded and executed by a processor.

[0157] To this end, an embodiment of the present application provides a computer readable storage medium, which stores a plurality of computer programs capable of being loaded by a processor to execute any one of the fan control methods provided by the embodiments of the present application. The computer program can execute the steps of the following fan control method:

[0158] If it is detected that the first fan fails, the rotation direction and the rotation speed of the first fan are obtained;

[0159] determining a target rotating speed according to the rotating direction and the rotating speed;

[0160] decelerating the second fan to the target rotating speed and controlling the first fan to restart.

[0161] The specific implementation of each operation can refer to the foregoing embodiments, which will not be described here again.

[0162] The computer readable storage medium can include a read only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, etc.

[0163] Due to the computer program stored in the computer readable storage medium, any fan control method provided by the embodiments of the present application can be executed, thus the beneficial effects of any fan control method provided by the embodiments of the present application can be achieved, which will be described in detail in the foregoing embodiments, and will not be described here again.

[0164] In the above fan control device, computer readable storage medium, ventilation equipment and computer program product, the description of each embodiment has its own focus, and the part not described in detail in a certain embodiment can refer to the related description of other embodiments. It can be clearly understood by those skilled in the art that, for the convenience and brevity of description, the specific working process of the above-described fan control device, computer readable storage medium, computer program product, ventilation equipment and its corresponding units and the beneficial effects brought by them can refer to the description of the fan control method in the above embodiments, and will not be described here again.

[0165] The above describes a fan control method, fan control device, ventilation equipment, computer readable storage medium and computer program product provided by the embodiments of the present application in detail. The principle and implementation manner of the present application are described by applying specific examples in this paper. The above embodiment description is only used to help understand the method of the present application and its core idea. Meanwhile, for those skilled in the art, according to the idea of the present application, the specific implementation manner and application range will be changed. In summary, the content of the specification should not be understood as a limitation of the present application.

Claims

1. A method of controlling a fan, characterized by, The application is applied to a ventilation device, and the ventilation device comprises at least two fans. If it is detected that the first fan fails, the rotating direction and the rotating speed of the first fan are obtained; The target rotating speed is determined according to the rotating direction and the rotating speed; The second fan is reduced to the target rotating speed, and the first fan is restarted; After the first fan is restarted, the following steps are further included: If the first fan fails to restart, the target reduction value is determined according to the difference between the target rotating speed and a preset rotating speed and a preset ratio relationship; The target rotating speed is updated according to the target reduction value, and the second fan is reduced to the target rotating speed and the first fan is restarted based on the updated target rotating speed; Until the first fan is successfully restarted or the number of restarts of the first fan is greater than or equal to a first preset number.

2. The fan control method of claim 1, wherein, The rotating direction and the rotating speed of the first fan are obtained by: The first phase current signal and the second phase current signal of the first fan are obtained; The rotating direction is determined according to the phase difference between the first phase current signal and the second phase current signal; The rotating speed is determined according to the frequency and amplitude of the first phase current signal or the frequency and amplitude of the second phase current signal.

3. The fan control method of claim 1, wherein, The method further includes: If the number of restarts of the first fan is greater than or equal to a first preset number, the rotating influence factor of the second fan on the first fan is determined according to the rotating direction, the rotating speed and the real-time rotating speed of the second fan when the first fan fails; The target reverse rotating speed of the second fan is determined according to the rotating influence factor and the preset restart initial rotating speed of the first fan; The second fan is controlled to rotate according to the preset reverse rotating direction and the target reverse rotating speed, and the first fan is restarted.

4. The fan control method of claim 1, wherein, After the second fan is adjusted to the target rotating speed and the first fan is restarted, the following steps are included: If the first fan is successfully started, the real-time rotating speed of the second fan is obtained, and the first fan is controlled to increase from the initial rotating speed to the real-time rotating speed; The first fan and the second fan are controlled to gradually increase from the real-time rotating speed to the working rotating speed.

5. The fan control method of claim 1, wherein, Before the rotating direction and the rotating speed of the first fan are obtained if it is detected that the first fan fails, the following steps are further included: The rotating speed difference between the first fan and the second fan is obtained; If the rotating speed difference is greater than a preset rotating speed difference, the first fan or the second fan is detected for failure; If the first fan or the second fan is not detected for failure, the intermediate rotating speed is determined according to the rotating speed difference; The first target fan with the highest rotating speed among the first fan and the second fan is controlled to reduce to the intermediate rotating speed, and the second target fan with the lowest rotating speed among the first fan and the second fan is controlled to increase to the intermediate rotating speed; Controlling the first fan and the second fan to gradually increase speed from the intermediate rotating speed to a working rotating speed synchronously.

6. The fan control method of claim 1, wherein, The target rotating speed is determined according to the rotating direction and the rotating speed, and the method comprises: Detecting a fault type of the first fan; Determining a restarting difficulty of the first fan according to the fault type; If the restarting difficulty is lower than a preset difficulty threshold, determining the target rotating speed according to the fault type, the rotating direction and the rotating speed.

7. A fan control device, characterized by comprising: The fan control device is applied to a ventilation equipment, and the ventilation equipment comprises at least two fans. An acquisition module is configured to acquire a rotating direction and a rotating speed of the first fan if a fault of the first fan is detected. A determination module is configured to determine a target rotating speed according to the rotating direction and the rotating speed. A control module is configured to control a second fan to decrease speed to the target rotating speed and to control the first fan to restart. If the first fan fails to restart, the control module is further configured to determine a target decreasing speed value according to a difference interval between the target rotating speed and a preset rotating speed and a preset ratio relationship. The target rotating speed is updated according to the target decreasing speed value, and the control of the second fan to decrease speed to the target rotating speed and the control of the first fan to restart are re-executed based on the updated target rotating speed. The first fan is restarted until the first fan is successfully restarted or a restarting number of the first fan is greater than or equal to a first preset number. The computer readable storage medium comprises a computer program, and when the computer program is executed on an electronic device, the computer program is used to make the electronic device execute the steps of the fan control method in any one of claims 1-6.

8. A ventilation device, characterized in that The computer readable storage medium comprises a computer program, and when the computer program is executed on an electronic device, the computer program is used to make the electronic device execute the steps of the fan control method in any one of claims 1-6.

9. A computer-readable storage medium, characterized in that, ​

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