KR-20260063069-A - Livestock ventilation fan control device using a closed loop

Abstract

The present invention relates to a ventilation fan control device for livestock facilities using a closed loop, and When a fan controller receiving AC power through a leakage circuit breaker is made to flow a fixed amount of current of tens of mA, the Hall sensor recognizes the intensity of the fixed amount of current flowing through the above closed-loop line, and By enabling each BLDC driver connected to each of the above-mentioned Hall sensors to recognize a rotational speed control signal based on the intensity of a fixed amount of current supplied through the fan controller, the recognized BLDC driver is configured to rotate the fan. This ensures that even if one fan fails, only that specific fan stops rotating while the other fans continue to rotate normally, thereby preventing the interruption of ventilation in the livestock barn. Additionally, since the fans are rotated with an efficiency of 0.9 or higher, the livestock barn can be managed with low maintenance costs. It is configured so that each BLDC driver forms a closed circuit, and if an overcurrent occurs while each BLDC driver is not operating or the fan is not rotating, an alarm is triggered on the fan controller by a relay switch that switches from an 'on' state to an 'off' state, thereby notifying the manager when any fan stops rotating, making it convenient to manage the livestock barn.

Inventors

• 한전수

Assignees

• 한전수

Dates

Publication Date

20260507

Application Date

20241030

Claims (1)

1. A fan controller (2) that receives AC power through a leakage circuit breaker (1) supplies a fixed amount of current of tens of mA as a rotational speed control signal to flow through a closed-loop line (3), and The Hall sensors (4)(4a)(4b) recognize the intensity of the current flowing through the above closed-loop line (3), and Each BLDC driver (5)(5a)(5b), connected to each of the above-mentioned Hall sensors (4)(4a)(4b), recognizes a rotational speed control signal according to the intensity of a fixed amount of current supplied through the fan controller (2), and The BLDC driver (5)(5a)(5b) that recognizes the above rotational speed control signal rotates the fan (6)(6a)(6b), and A ventilation fan control device for a livestock facility using a closed loop, characterized in that when each BLDC driver (5)(5a)(5b) forms a closed circuit and each BLDC driver (5)(5a)(5b) does not operate or the fan (6)(6a)(6b) does not rotate and an overcurrent occurs, an alarm (9) is activated in the fan controller (2) by a relay switch (8) that is converted from an 'off' state to an 'on' state by a relay (7).

Description

Livestock ventilation fan control device using a closed loop {omitted} **Closed-loop ventilation fan control device for livestock barns {omitted}** The present invention relates to a ventilation fan control device for livestock barns using a closed loop, and more specifically, to a ventilation fan control device for livestock barns using a closed loop in which a fan controller receiving AC power through a leakage circuit breaker supplies a fixed amount of current of tens of mA to flow through a closed loop line, and each BLDC driver that recognizes the intensity of the fixed amount of current flowing through the closed loop line via a Hall sensor rotates the fan so that even if one fan fails, only the rotation of that fan stops while other fans continue to rotate normally, thereby preventing the interruption of ventilation in the livestock barn; and since the fans are rotated with an efficiency of 0.9 or higher, the livestock barn can be managed with low maintenance costs, and an alarm function is added to each BLDC driver to notify the manager when the rotation of any fan is stopped, thereby making the management of the livestock barn convenient. In general, as meat consumption increases due to improved dietary habits, pig farming is being carried out on a large scale, and this intensive farming causes many social problems due to the foul odors emanating from pig farms. Since the release of malodorous gases from organic waste generated in pig farms leads to complaints from nearby residents, the gases cannot be directly discharged. Instead, the gases are captured via ducts and released after odor removal, but this process is not being effectively achieved. Furthermore, while composting plants that produce compost from organic waste generated in pig barns are equipped with such odor gas removal facilities, it is rare to install odor prevention facilities directly within the pig barns. Moreover, given the nature of pig barns where forced ventilation is unavoidable due to the temperatures generated by the livestock, there was a need for a facility that could effectively remove odors. Currently, ventilation systems used in domestic livestock barns are largely composed of "natural ventilation systems" that utilize wind pressure and the temperature difference between the inside and outside of the barn, and "motor-controlled fan systems" that use fans to compensate for the difference between the set temperature and the current temperature. First, the motor control method is a "phase control" method for controlling single-phase and three-phase AC motors, which controls the speed by detecting zero-crossing and turning it on/off according to the phase. This is easy to implement in a very classic way, but it also comes with many disadvantages. Generally, due to progressive motor issues, physical defects such as bearing wear, rotor bar wear, or breakage gradually increase current usage and convert it into heat. In addition to this, typical electrical defects such as insulation degradation and short circuits or open circuits in coil windings occur, which significantly affect the performance of the controller. In particular, the inflow of overcurrent can affect the power supply of fire or ventilation systems, and there is a very high probability that the same system diagram will fall into a blackout. Moreover, modern ventilation systems are closed-type, so even if the system goes down for only about 15 minutes, it affects the respiratory systems of pigs and chickens, leading to death. In addition, the controller has three or more phase control outputs, and a failure in even a single phase output can cause the entire controller system to shut down. Since the motor is driven by receiving electricity from the controller via phase control, there was no solution to this problem, which was a reality that had to be accepted. Thus, Patent Registration No. 10-2208658 (Natural Ventilation Type Livestock House) dated January 22, 2021 was proposed, and This is, the main body of the barn, An upper roof positioned on top of the above-mentioned livestock building body, It includes a lower roof that is spaced apart at a predetermined distance from one side and the other side of the upper roof to form an air passage, and The above-mentioned livestock building is, A first support that supports the edges of the lower roof at regular intervals and forms a livestock shed space on the inner side thereof, A wall portion that closes the space between the first supports above, It includes a second support that supports the upper roof at regular intervals in the above-mentioned livestock space, and It includes a connecting part that connects the first support and the lower roof, and The above-mentioned coupling part includes a flange formed on the upper side of the first support and in contact with the lower surface of the lower roof, and an elastic hook unit jointly fastened to a fastening hole of the flange and a fastening hole of the lower ro