Fan control method and device for ventilation system of breeding house and related equipment

Abstract

The invention relates to a fan control method and device of a breeding house ventilation system and related equipment. The method comprises the following steps: controlling a main fan to operate according to a pre-calibrated rotating speed; back electromotive force voltage generated by the standby fan is detected in real time, and the voltage difference value between the back electromotive force voltage and pre-calibrated back electromotive force voltage is calculated; the pre-calibrated back electromotive force voltage is the back electromotive force voltage generated by the standby fan when the main fan maintains the target air volume of the breeding house in the normal operation state; judging whether the voltage difference value is within a set voltage difference value range or not; if the voltage difference value is within the voltage difference value range, the main fan is controlled to continue to operate at the current rotating speed; and if the voltage difference value is not within the voltage difference value range, the rotating speed of the main draught fan is adjusted so that the voltage difference value can be within the voltage difference value range. According to the invention, the technical problems of high system cost, poor environmental adaptability, complex system and difficult maintenance caused by dependence on an external sensor in a breeding house ventilation system in the prior art are solved.

Description

Technical Field

[0001] The present application relates to the field of ventilation technology, and in particular to a fan control method, device and related equipment for a ventilation system of a breeding house. Background Art

[0002] In the high-density breeding industry, the ventilation system is very important, and the standard for judging whether the ventilation system is normal is the air volume flowing through the breeding house. In reality, after a long-term operation of the fan, the fan blades will deform to varying degrees, resulting in air volume attenuation. Too low air volume will lead to temperature deviation in the house, excessive harmful gases, decreased oxygen content and many other adverse consequences, thus affecting the normal growth of animals in the breeding house, and even causing the death of the breeding animals, causing huge economic losses to the breeder.

[0003] In the prior art, for example, an air volume sensor is installed at the correct position, such as the air inlet or outlet, to detect the air volume in and out of the breeding house. When the air volume does not meet the setting, the fan speed is adjusted to change the air volume so that the air volume in the breeding house is guaranteed to be within the required range. For another example, multiple types of sensors are installed in the house, such as temperature sensors, various harmful gas concentration sensors, oxygen content detection devices, etc. The sensors feed back the detected values ​​to the breeding environment controller, and the environment controller outputs the speed at which the fan should run according to the designed control logic scheme, so that all sensor indicators are finally within the design allowable range, thereby ensuring the environmental safety in the breeding house and ensuring the normal air volume in the breeding house from another perspective.

[0004] However, the above-mentioned prior arts all need to be configured with external sensors to feedback data as a basis for adjusting the fan speed, which is relatively high from the perspective of the cost of the overall ventilation system; they all involve external sensors, and the environment in the breeding house is harsh, such as the presence of corrosive gases for a long time. When cleaning and disinfecting the breeding house, it will also face the flushing of high-pressure water guns and the flushing of corrosive cleaning fluids. The sensors are relatively precise instruments and equipment. In such an environment for a long time, the accuracy cannot be guaranteed for a long time. IP protection and corrosion resistance are important factors affecting the normal operation of the sensors, so there is also a greater risk in terms of stability; in addition, there are various types of sensors in the prior art, and each sensor needs to be powered, some are DC powered, and some are AC powered; each feedback value must also be transmitted to the breeding environment controller, and the environment controller finally outputs the fan operating speed. The entire system involves the power supply of three types of equipment and the information transmission connection between them. The entire system is very complicated and very troublesome in the construction of the breeding house.

[0005] To address the above-mentioned problems, no effective solution has been proposed yet. Summary of the invention

[0006] The embodiments of the present application provide a fan control method, device and related equipment for a ventilation system of a breeding house, so as to at least solve the technical problems in the related art that the ventilation system of a breeding house relies on external sensors, resulting in high system cost, poor environmental adaptability, complex system and difficult maintenance.

[0007] According to one aspect of an embodiment of the present application, a fan control method for a ventilation system of a breeding house is provided, wherein the ventilation system of the breeding house comprises a main fan and a standby fan, and the method comprises: controlling the main fan to operate at a pre-calibrated speed; wherein the pre-calibrated speed is the speed required for the main fan to maintain a target air volume of the breeding house under normal operating conditions; detecting the back electromotive force voltage generated by the standby fan in real time, and calculating the voltage difference between the back electromotive force voltage and the pre-calibrated back electromotive force voltage; wherein the pre-calibrated back electromotive force voltage is the back electromotive force voltage generated by the standby fan when the main fan maintains the target air volume of the breeding house under normal operating conditions; judging whether the voltage difference is within a set voltage difference range; if the voltage difference is within the voltage difference range, controlling the main fan to continue to operate at the current speed; if the voltage difference is not within the voltage difference range, adjusting the speed of the main fan so that the voltage difference is within the voltage difference range.

[0008] Optionally, adjusting the rotational speed of the main fan includes: obtaining the input power of the main fan, and determining whether the input power of the main fan reaches the maximum input power of the main fan; if the input power of the main fan does not reach the maximum input power of the main fan, adjusting the rotational speed of the main fan by gradually increasing a preset number of revolutions; if the input power of the main fan reaches the maximum input power of the main fan, outputting a warning message of the main fan; wherein the warning message is used to prompt that the wind direction of the main fan is too small, and to suggest replacing the blades of the main fan.

[0009] Optionally, after controlling the main fan to continue running at the current speed, it also includes: obtaining the correlation between the speed of the main fan under the pre-established target air volume of the breeding house and the back electromotive force voltage generated by the backup fan; based on the correlation, obtaining the air volume of the breeding house using the current speed of the main fan.

[0010] Optionally, it also includes: when the main fan maintains the target air volume of the breeding house under normal operating conditions, the rotational speed of the main fan and the back electromotive force voltage generated by the backup fan are calibrated to establish a correlation between the rotational speed of the main fan and the back electromotive force voltage generated by the backup fan at the target air volume of the breeding house.

[0011] Optionally, the rotational speed of the main fan and the back electromotive force voltage generated by the backup fan are calibrated, including: using an air volume sensor to collect the air volume of the main fan, and when the air volume generated by the main fan reaches the target air volume, obtaining the rotational speed of the main fan and the back electromotive force voltage generated by the backup fan.

[0012] According to another aspect of an embodiment of the present application, a fan control device of a ventilation system for a breeding house is provided, the ventilation system for the breeding house comprising a main fan and a standby fan, the device comprising: a first control module, used to control the main fan to operate at a pre-calibrated speed; wherein the pre-calibrated speed is the speed required for the main fan to maintain the target air volume of the breeding house under normal operating conditions; a detection and calculation module, used to detect the back electromotive force voltage generated by the standby fan in real time, and calculate the voltage difference between the back electromotive force voltage and the pre-calibrated back electromotive force voltage; wherein the pre-calibrated back electromotive force voltage is the back electromotive force voltage generated by the standby fan when the main fan maintains the target air volume of the breeding house under normal operating conditions; a judgment module, used to judge whether the voltage difference is within a set voltage difference range; a second control module, used to control the main fan to continue to operate at the current speed if the voltage difference is within the voltage difference range; and a third control module, used to adjust the speed of the main fan if the voltage difference is not within the voltage difference range so that the voltage difference is within the voltage difference range.

[0013] Optionally, the third control module includes: an acquisition and judgment unit, used to acquire the input power of the main fan, and judge whether the input power of the main fan reaches the maximum input power of the main fan; a speed adjustment unit, used to adjust the speed of the main fan by gradually increasing a preset number of revolutions if the input power of the main fan does not reach the maximum input power of the main fan; a warning output unit, used to output a warning message of the main fan if the input power of the main fan reaches the maximum input power of the main fan; wherein the warning message is used to prompt that the wind direction of the main fan is too small, and to suggest replacing the blades of the main fan.

[0014] Optionally, it also includes an air volume monitoring module; wherein the air volume monitoring module includes: a relationship acquisition unit, which is used to obtain the correlation relationship between the rotational speed of the main fan and the back electromotive force voltage generated by the standby fan under the pre-established target air volume of the breeding house after controlling the main fan to continue to run at the current speed; an air volume acquisition unit, which is used to obtain the air volume of the breeding house according to the correlation relationship using the current rotational speed of the main fan.

[0015] According to another aspect of an embodiment of the present application, an electronic device is provided, including: a processor, and a memory storing a program, wherein the program includes instructions, and when the instructions are executed by the processor, the processor executes the method described above.

[0016] According to another aspect of an embodiment of the present application, a non-transitory machine-readable medium storing computer instructions is provided, wherein the computer instructions are used to enable the computer to execute the method described above.

[0017] In an embodiment of the present application, the method needs to predetermine the speed required for the main fan to maintain the target air volume under normal operating conditions, and record the back electromotive force voltage generated by the standby fan at this time as a reference value; during the operation of the main fan, the back electromotive force voltage generated by the standby fan is detected in real time, and the difference between it and the pre-calibrated back electromotive force voltage is calculated; according to the preset voltage difference range, it is judged whether the current voltage difference is within the allowable range; if the voltage difference is within the allowable range, it means that the main fan is operating normally and continues to maintain the current speed; if the voltage difference exceeds the allowable range, the speed of the main fan is adjusted to restore it to normal operating conditions, so that the voltage difference returns to the allowable range, thereby solving the technical problems in the related art that the ventilation system of the breeding house relies on external sensors, resulting in high system cost, poor environmental adaptability, complex system and difficult maintenance, and achieving the technical effects of reducing costs, improving stability, simplifying system structure and accurately controlling air volume. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following briefly introduces the drawings required for use in the embodiments or the prior art descriptions. Obviously, the drawings described below are only some embodiments of the present application, and for ordinary technicians in this field, other embodiments can be obtained based on these drawings without creative work.

[0019] Figure 1 A flow chart of a fan control method for a breeding house ventilation system provided in an embodiment of the present application;

[0020] Figure 2 A flow chart of a fan control method for a breeding house ventilation system provided in an optional embodiment of the present application;

[0021] Figure 3 A schematic diagram of a fan control device for a breeding house ventilation system provided in an embodiment of the present application;

[0022] Figure 4 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0023] The embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although certain embodiments of the present application are shown in the accompanying drawings, it should be understood that the embodiments of the present application can be implemented in various forms and should not be interpreted as being limited to the embodiments described herein. Instead, these embodiments are provided to provide a more thorough and complete understanding of the embodiments of the present application. It should be understood that the drawings and embodiments of the present application are only for exemplary purposes and are not intended to limit the scope of protection of the present application.

[0024] According to one aspect of an embodiment of the present application, a fan control method for a breeding house ventilation system is provided. The breeding house ventilation system includes a main fan and a backup fan. Figure 1 A flow chart of a fan control method for a ventilation system of a breeding house provided in an embodiment of the present application, such as Figure 1 As shown, the method comprises the following steps:

[0025] Step S102, controlling the main fan to operate at a pre-calibrated speed; wherein the pre-calibrated speed is the speed required for the main fan to maintain the target air volume of the breeding house under normal operating conditions;

[0026] Step S104, real-time detection of the back electromotive force voltage generated by the standby fan, and calculation of the voltage difference between the back electromotive force voltage and a pre-calibrated back electromotive force voltage; wherein the pre-calibrated back electromotive force voltage is the back electromotive force voltage generated by the standby fan when the main fan maintains the target air volume of the breeding house under normal operating conditions;

[0027] Step S106, determining whether the voltage difference is within a set voltage difference range;

[0028] Step S108, if the voltage difference is within the voltage difference range, the main fan is controlled to continue to run at the current speed;

[0029] Step S110: If the voltage difference is not within the voltage difference range, the rotation speed of the main fan is adjusted to make the voltage difference within the voltage difference range.

[0030] The above-mentioned voltage difference range can be set according to the needs of the application scenario, and will not be described in detail here.

[0031] In an embodiment of the present application, the method needs to predetermine the speed required for the main fan to maintain the target air volume under normal operating conditions, and record the back electromotive force voltage generated by the standby fan at this time as a reference value; during the operation of the main fan, the back electromotive force voltage generated by the standby fan is detected in real time, and the difference between it and the pre-calibrated back electromotive force voltage is calculated; according to a preset voltage difference range, it is determined whether the current voltage difference is within an allowable range; if the voltage difference is within the allowable range, it indicates that the main fan is operating normally and continues to maintain the current speed; if the voltage difference exceeds the allowable range, the speed of the main fan is adjusted to restore it to normal operating conditions, thereby returning the voltage difference to the allowable range, thereby solving the problem of breeding houses in the related art. The ventilation system relies on external sensors, which leads to high system cost, poor environmental adaptability, complex system and difficult maintenance. The technical effects of reducing cost (no need to install additional sensors, reducing the hardware cost of the system), improving stability (by detecting the back electromotive force voltage of the backup fan, the problem of traditional sensors being easily damaged in harsh environments is avoided, and the reliability and stability of the system are improved), simplifying the system structure (reducing the use of sensors and complex communication lines, making the system simpler, easier to install and maintain) and accurately controlling the air volume (by real-time monitoring of the back electromotive force voltage of the backup fan, the speed of the main fan can be adjusted more accurately to ensure that the air volume in the breeding house is always maintained within the target range) are achieved.

[0032] As an optional embodiment, adjusting the rotational speed of the main fan includes: obtaining the input power of the main fan, and determining whether the input power of the main fan reaches the maximum input power of the main fan; if the input power of the main fan does not reach the maximum input power of the main fan, adjusting the rotational speed of the main fan by gradually increasing a preset number of revolutions; if the input power of the main fan reaches the maximum input power of the main fan, outputting a warning message for the main fan; wherein the warning message is used to prompt that the wind direction of the main fan is too small, and to suggest replacing the blades of the main fan.

[0033] The above preset number of revolutions can be set according to the needs of the application scenario and will not be described in detail here.

[0034] Optionally, the input power of the main fan is monitored and obtained in real time through the control system of the main fan or the built-in monitoring module; the real-time obtained main fan input power is compared with the pre-set maximum input power to determine whether the maximum input power of the main fan has been reached; if the judgment result is that the input power of the main fan has not reached the maximum input power, the speed of the main fan is gradually increased through the control system, each time by a preset number of revolutions (such as 5 revolutions) until it is detected that the deviation of the back electromotive force voltage of the emergency fan returns to the set error range; if the judgment result is that the input power of the main fan has reached the maximum input power, the control system will no longer continue to increase the speed of the main fan and output a warning message, which is mainly used to remind the operator that the current air volume of the main fan is low, and it is recommended to check or replace the blades of the main fan to restore the normal operating performance of the fan.

[0035] In the embodiments of the present application, by dynamically adjusting the rotation speed of the main fan, it is possible to effectively cope with changes in air volume due to reasons such as blade deformation, ensuring that the air volume in the breeding house always remains at the set target air volume. The back-electromotive force detection method is used instead of the traditional external sensor to reduce the impact of external factors on system stability and improve the overall reliability and stability of the system. Through the intelligent monitoring and early warning mechanism, problems can be discovered and solved in a timely manner, avoiding large-scale losses caused by fan failures, while also reducing the cost of fan maintenance and replacement.

[0036] As an optional embodiment, after controlling the main fan to continue to run at the current speed, it also includes: obtaining the correlation between the speed of the main fan under the pre-established target air volume of the breeding house and the back electromotive force voltage generated by the standby fan; based on the correlation, using the current speed of the main fan to obtain the air volume of the breeding house.

[0037] In the early stage of building or renovating a breeding house, a calibration process is required. In this process, an air volume sensor is used to measure the actual air volume when the breeding house reaches the target air volume. The speed of the main fan when it reaches the target air volume, as well as the reverse speed of the standby fan caused by the internal and external air pressure difference and the voltage measured on the back electromotive force detection circuit of the standby fan at this time are recorded. The correlation between the main fan speed and the back electromotive force voltage of the standby fan under the target air volume is established.

[0038] When the main fan is running at the current speed, the back electromotive force voltage of the standby fan is monitored in real time. According to the pre-established correlation relationship, the air volume corresponding to the current main fan speed is calculated using the currently measured back electromotive force voltage of the standby fan.

[0039] In an embodiment of the present application, the actual air volume in the current breeding house can be monitored and calculated in real time through the correlation between the back-electromotive force voltage of the standby fan and the speed of the main fan. This method does not require the additional configuration of an air volume sensor, reducing hardware costs and maintenance difficulties. When the speed of the main fan remains unchanged, by monitoring the back-electromotive force voltage of the standby fan, changes in air volume can be detected in a timely manner. Using the back-electromotive force voltage of the standby fan for air volume monitoring avoids the problem of accuracy degradation and damage of traditional sensors in harsh environments, and improves the reliability and stability of the system.

[0040] As an optional embodiment, it also includes: when the main fan maintains the target air volume of the breeding house under normal operating conditions, the rotation speed of the main fan and the back electromotive force voltage generated by the standby fan are calibrated to establish a correlation between the rotation speed of the main fan at the target air volume of the breeding house and the back electromotive force voltage generated by the standby fan.

[0041] In order to improve the accuracy of calibration, multiple calibrations can be performed at different main fan speeds to record multiple sets of data points. Each time the main fan speed is adjusted, the corresponding standby fan back-EMF voltage and actual air volume are recorded. The recorded data points are sorted out, and the correlation between the main fan speed and the standby fan back-EMF voltage is established using data fitting or mathematical modeling methods. In addition, the established correlation can be stored in the main control chip or control system for use in subsequent operation.

[0042] In the embodiments of the present application, an accurate correlation between the main fan speed and the backup fan back electromotive force voltage is established through multiple calibrations and data fitting, thereby ensuring the accuracy of air volume monitoring.

[0043] As an optional embodiment, the rotation speed of the main fan and the back electromotive force voltage generated by the standby fan are calibrated, including: using an air volume sensor to collect the air volume of the main fan, and when the air volume generated by the main fan reaches the target air volume, obtaining the rotation speed of the main fan and the back electromotive force voltage generated by the standby fan.

[0044] Optionally, set the main fan to an initial speed and start the main fan to operate normally. Ensure that the standby fan is not in operation so that its back electromotive force voltage can be monitored. Use an air volume sensor to measure the actual air volume in the breeding house. When the air volume reaches the target air volume, record the speed of the main fan and the back electromotive force voltage of the standby fan at this time.

[0045] The optional implementation methods provided in this application are described in detail below.

[0046] In the optional implementation mode provided in the present application, the self-tuning of the fan air volume is achieved by utilizing the feature that two or more fans in the breeding house will affect each other when they are running. The specific principle is: when the fan is operating normally, the air pressure in the breeding house changes, and a pressure difference is generated between the normal external atmospheric pressure and the air pressure inside the breeding house. This pressure difference will cause the fan that is not running to rotate in the opposite direction, and when the permanent magnet motor is driven to rotate by an external force, a back electromotive force will be generated. This back electromotive force has a direct and clear corresponding relationship with the current speed of the motor, and the speed and the air volume flowing through the breeding house have a corresponding relationship. Therefore, as long as the back electromotive force induced by the motor when it is driven by an external force is kept the same, it can be determined that the air volume flowing through the breeding house is constant.

[0047] Furthermore, the specific implementation process is:

[0048] First, in the ventilation system of a conventional breeding house, there are usually two or more fans in a breeding house, and one of them is a backup fan, which will only run when other fans are working abnormally. Therefore, the blades of the backup fan will not be deformed due to long-term operation and can be considered as a standard blade. In modern large-scale breeding, breeding houses are all standardized and the internal structure is basically the same, so the breeding house can also be considered a standard breeding house.

[0049] Secondly, an air volume calibration process is required in the early stage, and an air volume sensor can be used during the calibration process. When the long-term main fan operates normally and reaches the target air volume in the breeding house (determined by the air volume sensor), it is necessary to record the speed of the main fan, the speed of the standby fan reversed by the air pressure difference, and the voltage measured on the back electromotive force detection circuit inside the standby fan. This voltage is the basis for determining whether the target air volume has been reached. A voltage difference range will also be set. When the back electromotive force voltage difference of the standby fan exceeds the voltage difference range, the main fan speed will be modulated.

[0050] again, Figure 2 A flow chart of a fan control method for a breeding house ventilation system provided in an optional embodiment of the present application, such as Figure 2As shown, the following is the normal working condition of the fan. When the fan in the breeding house is newly installed, the main fan runs at the speed at the time of calibration. The air volume is normal by detecting the back electromotive force voltage of the standby fan and judging whether the back electromotive force voltage difference is within the voltage difference range. If it is within the range, the current speed of the main fan is maintained. As the main fan runs for a long time, the shape of its blades begins to deform, and the same speed can no longer maintain the target air volume. At this time, the fan speed is increased by 5 revolutions each time until the back electromotive force voltage difference is controlled within the voltage difference range to ensure that the target air volume can be maintained. To maintain the target air volume, each increase in speed will cause the input power of the main fan to increase until the input power of the main fan reaches the maximum input power. The speed of the main fan will not automatically increase, and the fan controller will output a warning, indicating that the air volume is too small and the fan blades need to be replaced in time.

[0051] It should be noted that the air volume input to the breeding house is determined by the interaction of the fans, that is, the operation of the main fan will drive the backup fan to reverse; the higher the main fan speed, the greater the pressure difference between the inside and outside of the breeding house, and the higher the reverse speed of the backup fan. The relationship between the main fan operating speed and the backup fan reverse speed, that is, the back electromotive force voltage that the backup fan will reach when the target air volume is achieved is determined by calibrating the ventilation system of the breeding house in advance. The real-time detection of the back electromotive force of the backup fan is used to confirm whether the air volume in the breeding house is normal. When the back electromotive force voltage of the backup fan decreases, the main fan speed will be actively adjusted, and each adjustment will increase by 5 turns until the back electromotive force voltage difference of the backup fan is within the voltage difference range. The main fan and the backup fan in the breeding house are controlled by the fan controller. A main control chip is used inside the controller to control two or more fans. Therefore, the operating status of the two fans can be called by each other inside the chip to complete the logic and algorithm control, and there is no need for the fans to transmit information through communication. The speed of the main fan cannot continue to increase just because the target air volume cannot be reached. It will be limited by the maximum input power of the fan. When the input power of the fan reaches the maximum input power, the speed of the fan will no longer increase. At the same time, the fan controller will output a warning, indicating that the air volume is too small and the fan blades need to be replaced in time.

[0052] In an optional implementation manner of the present application, the method for obtaining the wind volume information in the breeding house does not require additional sensors, and the wind volume information can be obtained by only utilizing the interaction relationship between the fans in the ventilation system, thus saving the cost of sensors; the method for automatically adjusting the wind volume in the breeding house also does not require additional sensors, and the operating speed of the main fan is adjusted in real time based on the monitoring of the operating status of the standby fan. The method is concise and logically clear, and has low requirements for the construction of the breeding house. In addition to being applicable to newly built breeding houses, it is also applicable to the renovation of old breeding houses, and only requires prior calibration work; based on basic physical phenomena, it is also very suitable for the application of ventilation systems in breeding houses and has strong reliability.

[0053] In addition, although the present application lists environmental applications in breeding houses, it is also applicable to various application environments of different industry types; although the main fan and the backup fan are listed, it is also applicable to other application fans and multiple fan groups; in the process of adjusting the fan speed, although it is listed as an increase of 5 revolutions each time, no matter how many revolutions are increased each time, it is the same as the method of the present application; although one air volume point in the breeding house is listed, it is also applicable to the application of multiple air volume points, because multiple air volume point working conditions will be selected according to factors such as the season and the animals being farmed; although the factors affecting the air volume include fan blade deformation, other factors cause the air volume to change, and only the method of air volume detection and adjustment is the same, and the essence is still the same as the present application.

[0054] According to another aspect of an embodiment of the present application, a fan control device of a ventilation system for a breeding house is provided. The ventilation system for a breeding house includes a main fan and a backup fan. Figure 3 A schematic diagram of a fan control device for a breeding house ventilation system provided in an embodiment of the present application, as shown in FIG. Figure 3 As shown, the fan control device of the ventilation system of the breeding house includes: a first control module 302, a detection and calculation module 304, a judgment module 306, a second control module 308 and a third control module 310. The fan control device of the ventilation system of the breeding house is described in detail below.

[0055] The first control module 302 is used to control the main fan to operate at a pre-calibrated speed; wherein the pre-calibrated speed is the speed required for the main fan to maintain the target air volume of the breeding house under normal operating conditions;

[0056] The detection and calculation module 304 is connected to the first control module 302 and is used to detect the back electromotive force voltage generated by the standby fan in real time and calculate the voltage difference between the back electromotive force voltage and the pre-calibrated back electromotive force voltage; wherein the pre-calibrated back electromotive force voltage is the back electromotive force voltage generated by the standby fan when the main fan maintains the target air volume of the breeding house under normal operating conditions;

[0057] A judgment module 306, connected to the detection and calculation module 304, is used to judge whether the voltage difference is within a set voltage difference range;

[0058] The second control module 308 is connected to the judgment module 306 and is used to control the main fan to continue to run at the current speed if the voltage difference is within the voltage difference range;

[0059] The third control module 310 is connected to the judgment module 306 and is used to adjust the rotation speed of the main fan to make the voltage difference within the voltage difference range if the voltage difference is not within the voltage difference range.

[0060] In an embodiment of the present application, the device needs to predetermine the speed required for the main fan to maintain the target air volume under normal operating conditions, and record the back electromotive force voltage generated by the standby fan at this time as a reference value; during the operation of the main fan, the back electromotive force voltage generated by the standby fan is detected in real time, and the difference between it and the pre-calibrated back electromotive force voltage is calculated; according to the preset voltage difference range, it is judged whether the current voltage difference is within the allowable range; if the voltage difference is within the allowable range, it means that the main fan is operating normally and continues to maintain the current speed; if the voltage difference exceeds the allowable range, the speed of the main fan is adjusted to restore it to normal operating conditions, so that the voltage difference returns to the allowable range, thereby solving the problem of breeding houses in the related technology. The ventilation system relies on external sensors, which leads to high system cost, poor environmental adaptability, complex system and difficult maintenance. The technical effects of reducing cost (no need to install additional sensors, reducing the hardware cost of the system), improving stability (by detecting the back electromotive force voltage of the backup fan, the problem of traditional sensors being easily damaged in harsh environments is avoided, and the reliability and stability of the system are improved), simplifying the system structure (reducing the use of sensors and complex communication lines, making the system simpler, easier to install and maintain) and accurately controlling the air volume (by real-time monitoring of the back electromotive force voltage of the backup fan, the speed of the main fan can be adjusted more accurately to ensure that the air volume in the breeding house is always maintained within the target range) are achieved.

[0061] It should be noted here that the above-mentioned first control module 302, detection and calculation module 304, judgment module 306, second control module 308 and third control module 310 correspond to steps S102 to S110 in the method embodiment, and the examples and application scenarios implemented by the above-mentioned modules and corresponding steps are the same, but are not limited to the contents disclosed in the above-mentioned method embodiment.

[0062] As an optional embodiment, the third control module includes: an acquisition and judgment unit, used to acquire the input power of the main fan, and judge whether the input power of the main fan reaches the maximum input power of the main fan; a speed adjustment unit, used to adjust the speed of the main fan by gradually increasing a preset number of revolutions if the input power of the main fan does not reach the maximum input power of the main fan; a warning output unit, used to output a warning message of the main fan if the input power of the main fan reaches the maximum input power of the main fan; wherein the warning message is used to prompt that the wind direction of the main fan is too small, and to suggest replacing the blades of the main fan.

[0063] As an optional embodiment, it also includes an air volume monitoring module; wherein the air volume monitoring module includes: a relationship acquisition unit, which is used to obtain the correlation between the rotational speed of the main fan and the back electromotive force voltage generated by the standby fan under the pre-established target air volume of the breeding house after controlling the main fan to continue to run at the current speed; an air volume acquisition unit, which is used to obtain the air volume of the breeding house according to the correlation relationship using the current rotational speed of the main fan.

[0064] As an optional embodiment, it also includes: a data calibration module, which is used to calibrate the rotation speed of the main fan and the back electromotive force voltage generated by the standby fan when the main fan maintains the target air volume of the breeding house under normal operating conditions, and establish a correlation between the rotation speed of the main fan and the back electromotive force voltage generated by the standby fan at the target air volume of the breeding house.

[0065] As an optional embodiment, the above-mentioned data calibration module includes: a data calibration unit, which is used to collect the air volume of the main fan using an air volume sensor, and when the air volume generated by the main fan reaches the target air volume, obtains the rotation speed of the main fan and the back electromotive force voltage generated by the standby fan.

[0066] According to another aspect of an embodiment of the present application, an electronic device is provided, including: a processor, and a memory storing a program, wherein the program includes instructions, and when the instructions are executed by the processor, the processor executes the method of the embodiment of the present application.

[0067] According to another aspect of an embodiment of the present application, a non-transitory machine-readable medium storing computer instructions is provided, where the computer instructions are used to enable a computer to execute the method of the embodiment of the present application.

[0068] According to another aspect of an embodiment of the present application, a computer program product is provided, including a computer program, wherein the computer program, when executed by a processor of a computer, is used to cause the computer to execute the method of the embodiment of the present application.

[0069] refer to Figure 4 , the structural block diagram of the electronic device that can be used as the server or client of the embodiment of the present application will now be described, which is an example of the hardware device that can be applied to various aspects of the present application. The electronic device is intended to represent various forms of digital electronic computer equipment, such as laptop computers, desktop computers, workbenches, personal digital assistants, servers, blade servers, mainframe computers and other suitable computers. The electronic device can also represent various forms of mobile devices, such as personal digital processing, cellular phones, smart phones, wearable devices and other similar computing devices. The components shown herein, their connections and relationships, and their functions are only examples, and are not intended to limit the implementation of the present application described and / or required herein.

[0070] like Figure 4 As shown, the electronic device includes a computing unit 401, which can perform various appropriate actions and processes according to a computer program stored in a read-only memory (ROM) 402 or a computer program loaded from a storage unit 408 into a random access memory (RAM) 403. In RAM 403, various programs and data required for the operation of the electronic device can also be stored. The computing unit 401, ROM 402, and RAM 403 are connected to each other via a bus 404. An input / output (I / O) interface 405 is also connected to the bus 404.

[0071] Multiple components in the electronic device are connected to the I / O interface 405, including: an input unit 406, an output unit 407, a storage unit 408, and a communication unit 409. The input unit 406 can be any type of device that can input information to the electronic device, and the input unit 406 can receive input digital or character information, and generate key signal input related to user settings and / or function control of the electronic device. The output unit 407 can be any type of device that can present information, and can include but is not limited to a display, a speaker, a video / audio output terminal, a vibrator, and / or a printer. The storage unit 408 can include but is not limited to a disk, an optical disk. The communication unit 409 allows the electronic device to exchange information / data with other devices through a computer network such as the Internet and / or various telecommunication networks, and can include but is not limited to a modem, a network card, an infrared communication device, and a wireless communication transceiver, such as a Bluetooth device, a WiFi device, a WiMax device, a cellular communication device, and / or the like.

[0072] The computing unit 401 may be a variety of general and / or special processing components with processing and computing capabilities. Some examples of the computing unit 401 include, but are not limited to, a CPU, a graphics processing unit (GPU), various dedicated artificial intelligence (AI) computing units, various computing units running machine learning model algorithms, digital signal processors (DSPs), and any appropriate processors, controllers, microcontrollers, etc. The computing unit 401 performs the various methods and processes described above. For example, in some embodiments, the method embodiments of the present application may be implemented as a computer program, which is tangibly contained in a machine-readable medium, such as a storage unit 408. In some embodiments, part or all of the computer program may be loaded and / or installed on an electronic device via ROM 402 and / or a communication unit 409. In some embodiments, the computing unit 401 may be configured to perform the above-described method in any other appropriate manner (e.g., by means of firmware).

[0073] The computer program for implementing the method of the embodiment of the present application can be written in any combination of one or more programming languages. These computer programs can be provided to a processor or controller of a general-purpose computer, a special-purpose computer, or other programmable data processing device, so that when the computer program is executed by the processor or controller, the functions / operations specified in the flow chart and / or block diagram are implemented. The computer program can be executed entirely on the machine, partially on the machine, partially on the machine as a stand-alone software package and partially on a remote machine, or entirely on a remote machine or server.

[0074] In the context of the present application embodiment, machine-readable medium can be a tangible medium that can contain or store a program for use by an instruction execution system, device or equipment or used in combination with an instruction execution system, device or equipment. Machine-readable medium can be a machine-readable signal medium or a machine-readable storage medium. Machine-readable signal medium can include but is not limited to electronic, magnetic, optical, electromagnetic, infrared systems, devices or equipment, or any suitable combination of the above. More specific examples of machine-readable storage media can include electrical connections based on one or more lines, portable computer disks, hard disks, random access memories (RAM), read-only memories (ROM), erasable programmable read-only memories (EPROM or flash memory), optical fibers, portable compact disk read-only memories (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination of the above.

[0075] It should be noted that the term "including" and its variations used in the embodiments of the present application are open inclusions, that is, "including but not limited to". The term "based on" means "based at least in part on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one other embodiment"; the term "some embodiments" means "at least some embodiments". The modifications of "one" and "multiple" mentioned in the embodiments of the present application are illustrative and not restrictive. Those skilled in the art should understand that unless otherwise clearly indicated in the context, it should be understood as "one or more".

[0076] The various steps described in the method implementation methods provided in the embodiments of the present application can be performed in different orders and / or in parallel. In addition, the method implementation methods may include additional steps and / or omit the steps shown. The scope of protection of the present application is not limited in this respect.

[0077] The term "embodiment" in this specification refers to specific features, structures or characteristics described in conjunction with the embodiment that can be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily mean the same embodiment, nor does it mean that it is mutually exclusive with other embodiments and is independent or optional. The various embodiments in this specification are described in a related manner, and the same or similar parts between the various embodiments refer to each other. In particular, for the device, equipment, and system embodiments, since they are basically similar to the method embodiments, the description is relatively simple, and the relevant parts refer to the partial description of the method embodiment.

[0078] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of patent protection. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the scope of protection of the present application. Therefore, the scope of protection of the present application shall be subject to the attached claims.

Claims

1. A fan control method for a ventilation system of a breeding house, characterized in that: The breeding house ventilation system comprises a main fan and a standby fan, and the method comprises: Controlling the main fan to run at a pre-calibrated speed; wherein the pre-calibrated speed is the speed required for the main fan to maintain the target air volume of the breeding house under normal operating conditions; Detecting the back electromotive force voltage generated by the standby fan in real time, and calculating the voltage difference between the back electromotive force voltage and a pre-calibrated back electromotive force voltage; wherein the pre-calibrated back electromotive force voltage is the back electromotive force voltage generated by the standby fan when the main fan maintains the target air volume of the breeding house under normal operating conditions; Determining whether the voltage difference is within a set voltage difference range; If the voltage difference is within the voltage difference range, controlling the main fan to continue running at the current speed; If the voltage difference is not within the voltage difference range, the rotation speed of the main fan is adjusted to make the voltage difference within the voltage difference range.

2. The fan control method of the breeding house ventilation system according to claim 1 is characterized in that: Adjusting the rotation speed of the main fan includes: Obtaining the input power of the main fan, and determining whether the input power of the main fan reaches the maximum input power of the main fan; If the input power of the main fan does not reach the maximum input power of the main fan, the rotation speed of the main fan is adjusted by gradually increasing the preset number of revolutions; If the input power of the main fan reaches the maximum input power of the main fan, a warning message of the main fan is output; wherein the warning message is used to prompt that the wind direction of the main fan is too small and to suggest replacing the blades of the main fan.

3. The fan control method of the breeding house ventilation system according to claim 1 is characterized in that: After controlling the main fan to continue to run at the current speed, the method further includes: Obtaining a correlation relationship between the rotation speed of the main fan and the back electromotive force voltage generated by the standby fan at the target air volume of the breeding house established in advance; According to the association relationship, the air volume of the breeding house is obtained using the current rotation speed of the main fan.

4. The fan control method of the ventilation system of a breeding house according to any one of claims 1 to 3, characterized in that: Also includes: When the main fan maintains the target air volume of the breeding house under normal operating conditions, the rotational speed of the main fan and the back electromotive force voltage generated by the standby fan are calibrated to establish a correlation between the rotational speed of the main fan and the back electromotive force voltage generated by the standby fan at the target air volume of the breeding house.

5. The fan control method of the breeding house ventilation system according to claim 4 is characterized in that: Calibrate the rotation speed of the main fan and the back electromotive force voltage generated by the standby fan, including: An air volume sensor is used to collect the air volume of the main fan. When the air volume generated by the main fan reaches the target air volume, the rotation speed of the main fan and the back electromotive force voltage generated by the standby fan are obtained.

6. A fan control device for a ventilation system of a breeding house, characterized in that: The breeding house ventilation system includes a main fan and a standby fan, and the device includes: A first control module is used to control the main fan to operate at a pre-calibrated speed; wherein the pre-calibrated speed is the speed required for the main fan to maintain the target air volume of the breeding house under normal operating conditions; A detection and calculation module, used for detecting the back electromotive force voltage generated by the standby fan in real time, and calculating the voltage difference between the back electromotive force voltage and a pre-calibrated back electromotive force voltage; wherein the pre-calibrated back electromotive force voltage is the back electromotive force voltage generated by the standby fan when the main fan maintains the target air volume of the breeding house under normal operating conditions; A judging module, used for judging whether the voltage difference is within a set voltage difference range; A second control module is used to control the main fan to continue to run at a current speed if the voltage difference is within the voltage difference range; The third control module is used for adjusting the rotation speed of the main fan to make the voltage difference within the voltage difference range if the voltage difference is not within the voltage difference range.

7. The fan control device of the ventilation system of the breeding house according to claim 6, characterized in that: The third control module comprises: an acquisition and judgment unit, used for acquiring the input power of the main fan and judging whether the input power of the main fan reaches the maximum input power of the main fan; A speed adjustment unit, used for adjusting the speed of the main fan by gradually increasing a preset number of revolutions if the input power of the main fan does not reach the maximum input power of the main fan; A warning output unit is used to output a warning message of the main fan if the input power of the main fan reaches the maximum input power of the main fan; wherein the warning message is used to prompt that the wind direction of the main fan is too small and to suggest replacing the blades of the main fan.

8. The fan control device of the ventilation system of a breeding house according to claim 6, characterized in that: Also includes an air volume monitoring module; wherein the air volume monitoring module includes: A relationship acquisition unit, used for acquiring a correlation relationship between the rotation speed of the main fan and the back electromotive force voltage generated by the standby fan at a pre-established target air volume of the breeding house after controlling the main fan to continue to run at a current rotation speed; The air volume acquisition unit is used to acquire the air volume of the breeding house according to the association relationship and using the current rotation speed of the main fan.

9. An electronic device, comprising: A processor and a memory storing a program, wherein the program comprises instructions, and when the instructions are executed by the processor, the processor executes the method according to any one of claims 1 to 5.

10. A non-transitory machine-readable medium storing computer instructions, characterized in that: The computer instructions are used to cause the computer to execute the method according to any one of claims 1 to 5.

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