BLDC Motor Structure for Driving Large Fans and Fan Ventilation System for Livestock Housing Comprising the Same

Abstract

The invention relates to a BLDC motor structure for driving a large fan and a fan ventilation system for a livestock barn equipped with the same. The BLDC motor structure for driving a large fan according to the present invention comprises: a ventilation fan rotatably provided to ventilate air within a livestock housing space within a livestock barn; a fan protection net surrounding the ventilation fan to protect the ventilation fan; a BLDC motor (Brushless DC Motor) coupled to one side of the fan protection net and connected to the ventilation fan through a rotating shaft, and equipped with a power controller capable of power control that generates power for the ventilation fan to rotate; an input unit for inputting a signal for the operation or stop of the ventilation fan; and a motor controller that controls the operation of the BLDC motor based on the input signal of the input unit so that the ventilation fan can rotate at a predetermined speed and direction.

Description

Technology Field

[0001] The present invention relates to a BLDC motor structure for driving a large fan and a fan ventilation system for a livestock barn equipped with the same. More specifically, the invention relates to a BLDC motor structure for driving a large fan and a fan ventilation system for a livestock barn equipped with the same, which can reduce electricity costs by approximately 50% or more with low power consumption, provide a comfortable environment by operating with no or reduced noise, enable efficient energy management by allowing monitoring control of multiple groups, and maintain an optimal operating state suitable for the application by operating at a constant speed regardless of load fluctuations. Background Technology

[0002] Large fans are used in various fields, such as industry, construction, environment, and agriculture, to regulate airflow or control heat. Although their structures vary slightly by manufacturer, they share the same function of creating airflow by rotating a propeller.

[0003] Large fans can be used for the following purposes.

[0004] First, it is for industrial ventilation and cooling purposes.

[0005] Large fans can be used in factories, power plants, steel mills, and the like for cooling high-temperature equipment and circulating air. Types include industrial blowers and exhaust fans.

[0006] Second, it is used for architectural and commercial facilities. It can be used for air circulation and harmful gas exhaust in underground parking lots, tunnels, and large buildings. Types include smoke extraction fans and fans for HVAC systems.

[0007] Third, there are applications in agriculture and livestock farming. They can be used to control temperature and humidity in livestock barns or greenhouses, promoting the maintenance of animal health and the growth of crops. Livestock ventilation fans are a representative example.

[0008] Fourth, it is used for cooling data centers and electronic equipment. It can be used to remove heat from server rooms or telecommunications equipment rooms.

[0009] Fifth, it is used for mining and tunnel construction. It can be used to remove harmful gases from underground spaces while supplying fresh outside air.

[0010] Sixth, it is intended for use in sports facilities and large indoor spaces. It can be used for air circulation and cooling assistance in stadiums, airports, exhibition halls, etc.

[0011] Meanwhile, among the various uses mentioned above, large fans are widely utilized for agricultural and livestock purposes; in particular, large fans are frequently used in livestock barns to regulate the temperature of livestock.

[0012] Unlike ordinary household fans, it is widely known that large fans, for example, have blade diameters of 1 meter or more, and a motor suitable for rotating such large fans is required. However, until now, it has been common practice to commercialize products by connecting ordinary motors to large fans, which inevitably leads to the problem of requiring a large amount of energy. Prior art literature

[0013] Korean Intellectual Property Office Application No. 10-2016-0053289 Korean Intellectual Property Office Application No. 10-2017-0006985 Korean Intellectual Property Office Application No. 10-2023-0033745 Korean Intellectual Property Office Application No. 10-2023-0178658 The problem to be solved

[0014] The objective of the present invention is to provide a BLDC motor structure for driving a large fan and a fan ventilation system for a livestock barn equipped with the same, which can reduce electricity costs by approximately 50% or more with low power consumption, provide a comfortable environment by operating with no or reduced noise, enable efficient energy management by allowing monitoring control of multiple groups, and maintain an optimal operating state suitable for the application by operating at a constant speed regardless of load fluctuations. means of solving the problem

[0015] The above objective is achieved by a BLDC motor structure for driving a large fan, characterized by comprising: a ventilation fan rotatably arranged to ventilate air within a livestock housing space within a livestock barn; a fan protection net body surrounding and protecting the ventilation fan; a BLDC motor (Brushless DC Motor) coupled to one side of the fan protection net body and connected to the ventilation fan through a rotating shaft, and equipped with a power controller capable of power control that generates power for the ventilation fan to rotate; an input unit for inputting a signal for the operation or stop of the ventilation fan; and a motor controller that controls the operation of the BLDC motor based on the input signal of the input unit so that the ventilation fan can rotate at a predetermined speed and direction.

[0016] It may further include a motor support connected to the back surface of the fan protection mesh and supporting the BLDC motor.

[0017] The above objective is achieved by comprising: a plurality of BLDC motor structures for driving large fans, each provided on the wall of the livestock barn forming each zone when the livestock barn is partitioned into a plurality of zones, and ventilating the air within the livestock housing space within the livestock barn; and a system control unit connected to the BLDC motor structures for driving large fans and individually controlling the operation of the BLDC motor structures for driving large fans, wherein the BLDC motor structures for driving large fans include: a ventilation fan rotatably provided for ventilating the livestock barn; a fan protection mesh body surrounding and protecting the ventilation fan; a BLDC motor (Brushless DC Motor) coupled to one side of the fan protection mesh body and connected to the ventilation fan via a rotation shaft, and equipped with a power controller capable of power control that generates power for the ventilation fan to rotate; and an input unit for inputting a signal for the operation or stop of the ventilation fan. This is achieved by a fan ventilation system for a livestock barn, characterized by including a motor controller that controls the operation of the BLDC motor based on the input signal of the input unit so that the ventilation fan can rotate at a predetermined speed and direction.

[0018] The system may further include a plurality of zone temperature measuring devices, each provided on the inner wall of the corresponding zone corresponding to the installation location of the BLDC motor structure for driving the large fan, and measuring the internal temperature of the corresponding zone, and the system control unit can individually control the operation of the BLDC motor structures for driving the large fan based on the corresponding temperature values ​​of the zone temperature measuring devices. Effects of the invention

[0019] According to the present invention, it is possible to reduce electricity costs by approximately 50% or more with low power consumption, and since it operates with no or reduced noise, it can provide a comfortable environment. In addition, it enables efficient energy management by allowing multiple group monitoring controls, and since it can operate at a constant speed regardless of load fluctuations, it has the effect of maintaining an optimal operating state suitable for the application. Brief explanation of the drawing

[0020] FIG. 1 is a schematic front view of a BLDC motor structure for driving a large fan according to a first embodiment of the present invention. Figure 2 is a side view of the structure of Figure 1. Figure 3 is a control block diagram for a BLDC motor structure for driving a large fan of Figure 1. FIG. 4 is a schematic structural diagram of a livestock barn to which a fan ventilation system according to the second embodiment of the present invention is applied. Figure 5 is a control block diagram of a fan ventilation system for a livestock barn applied to the livestock barn of Figure 4. FIG. 6 is a schematic structural diagram of a livestock barn to which a fan ventilation system according to the third embodiment of the present invention is applied. Figure 7 is a control block diagram of a fan ventilation system for a livestock barn applied to the livestock barn of Figure 6. FIG. 8 is a schematic structural diagram of a livestock barn to which a fan ventilation system according to the fourth embodiment of the present invention is applied. Figure 9 is a control block diagram of a fan ventilation system for a livestock barn applied to the livestock barn of Figure 8. Specific details for implementing the invention

[0021] Below, embodiments of the present invention are described in detail with reference to the attached drawings so that those skilled in the art can easily implement the invention.

[0022] However, since the description of the present invention is merely an example for structural or functional explanation, the scope of the present invention shall not be interpreted as being limited by the examples described in the text.

[0023] For example, since the embodiments can be modified in various ways and can take various forms, the scope of the present invention should be understood to include equivalents capable of realizing the technical concept.

[0024] Furthermore, the purposes or effects presented in this invention do not imply that specific embodiments must include all of them or only such effects; therefore, the scope of the rights of this invention should not be understood as being limited by them.

[0025] In this specification, the embodiments are provided to make the disclosure of the invention complete and to fully inform those skilled in the art of the scope of the invention. The invention is defined only by the scope of the claims.

[0026] Accordingly, in some embodiments, well-known components, well-known operations, and well-known techniques are not specifically described to avoid the invention being interpreted ambiguously.

[0027] Meanwhile, the meaning of the terms described in this invention is not limited to their dictionary meanings and should be understood as follows.

[0028] When it is stated that a component is "connected" to another component, it should be understood that it may be directly connected to that other component, or that there may be other components in between. Conversely, when it is stated that a component is "directly connected" to another component, it should be understood that there are no other components in between. Meanwhile, other expressions describing the relationship between components, such as "between" and "exactly between," or "adjacent to" and "directly adjacent to," should be interpreted in the same way.

[0029] A singular expression should be understood to include a plural expression unless the context clearly indicates otherwise, and terms such as "include" or "have" are intended to specify the existence of the set-up features, numbers, steps, actions, components, parts, or combinations thereof, and should be understood not to preclude the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0030] Unless otherwise defined, all terms used herein have the same meaning as generally understood by those skilled in the art to which this invention pertains.

[0031] Terms defined in commonly used dictionaries should be interpreted as having meanings consistent with the context of the relevant technology, and should not be interpreted as having an ideal or overly formal meaning unless explicitly defined in the present invention.

[0032] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the description of the embodiments, the same reference numerals are assigned to identical components, and descriptions of identical reference numerals may be omitted where applicable.

[0033] (1st embodiment)

[0034] FIG. 1 is a schematic front view of a BLDC motor structure for driving a large fan according to a first embodiment of the present invention, FIG. 2 is a side view of FIG. 1, and FIG. 3 is a control block diagram of the BLDC motor structure for driving a large fan according to FIG. 1.

[0035] Referring to these drawings, the BLDC motor structure (100) for driving a large fan according to the present embodiment can reduce electricity costs by approximately 50% or more with low power consumption and can provide a comfortable environment because it operates with no or reduced noise. In addition, it can enable efficient energy management by allowing multiple group monitoring controls and can operate at a constant speed regardless of load fluctuations, thereby maintaining an optimal operating state suitable for the application.

[0036] The BLDC motor structure (100) for driving a large fan according to the present embodiment, which can provide such effects, can be used, for example, for ventilation in a livestock barn. However, the BLDC motor structure (100) for driving a large fan according to the present embodiment is not necessarily limited to use only for ventilation in a livestock barn. That is, the BLDC motor structure (100) for driving a large fan according to the present embodiment can be utilized in various ways, such as for industrial ventilation and cooling, for construction and commercial facilities, for agriculture and livestock farming, for data centers and electronic equipment cooling, for mining and tunnel construction, for sports facilities and large indoor spaces. Therefore, the scope of the rights of the present invention is not limited to the application. However, below, the BLDC motor structure (100) for driving a large fan according to the present embodiment is considered to be applied to a livestock barn.

[0037] The BLDC motor structure (100) for driving a large fan according to the present embodiment includes a ventilation fan (110). The ventilation fan (110) is rotatably provided to ventilate the air within the livestock housing space in the livestock barn. The ventilation fan (110) applied in the present embodiment is a large fan. Therefore, its efficiency is good. Also, the drawing shows a ventilation fan (110) with five blades, but this is merely one example. That is, the blades of the ventilation fan (110) may be three, or six or more, and all such matters should be considered to fall within the scope of the present invention.

[0038] A fan protection mesh (120) is attached around the ventilation fan (110). The fan protection mesh (120) surrounds the ventilation fan (110) and serves to protect the ventilation fan (110). The fan protection mesh (120) is constructed with a strong steel wire structure so that the airflow through the ventilation fan (110) is not obstructed.

[0039] Meanwhile, the BLDC motor structure (100) for driving a large fan according to the present embodiment includes a BLDC motor (130, Brushless DC Motor).

[0040] The BLDC motor (130) is coupled to one side of the fan protection mesh (120) and connected to the ventilation fan (110) through a rotating shaft, and serves to generate power for the ventilation fan (110) to rotate. The BLDC motor (130) is equipped with a power controller (131) capable of power control.

[0041] Let me explain the BLDC motor (130) further. As the name suggests, the BLDC motor (130) is a brushless DC motor. Conventional brushed DC motors control rotation using worn brushes and commutators, but the BLDC motor (130) replaces this part with an electronic circuit, namely an inverter.

[0042] To briefly look at the structure, a coil is wound around the stator of the BLDC motor (130) and serves to push the rotor. A permanent magnet is attached to the rotor. The rotational position can be detected through a Hall sensor or encoder, and the rectification operation is performed electronically through the power controller (131).

[0043] As mentioned above, since this BLDC motor (130) is brushless, it has low wear and a long lifespan. It is capable of high-speed rotation and is advantageous for precise control, and has the advantage of low noise and electrical noise. In particular, the BLDC motor (130) has the great advantage of being highly energy efficient and generating little heat. Accordingly, this embodiment applies this BLDC motor (130).

[0044] A motor support (140) is provided for the installation of a BLDC motor (130). The motor support (140) is connected to the back surface of the fan protection mesh (120) and is a means for supporting the BLDC motor (130). The BLDC motor (130) can be detachably coupled to the motor support (140) through a bolt and nut structure.

[0045] Meanwhile, the BLDC motor structure (100) for driving a large fan according to the present embodiment includes an input unit (170) and a motor controller (180) as means for controlling the device.

[0046] The input unit (170) is a means for inputting a signal for operating or stopping the ventilation fan (110). The input unit (170) may be applied in the form of a button on one side of the BLDC motor structure (100) for driving a large fan, or it may be provided as a remote control type.

[0047] The motor controller (180) controls the operation of the BLDC motor (130) based on the input signal of the input unit (170) so that the ventilation fan (110) can rotate at a predetermined speed and direction. The motor controller (180) performing this role may include a central processing unit (181, CPU), a memory (182, MEMORY), and a support circuit (183, SUPPORT CIRCUIT).

[0048] The central processing unit (181) in this embodiment may be one of various computer processors that can be industrially applied to control the operation of the BLDC motor (130) so that the ventilation fan (110) can rotate at a predetermined speed and direction based on the input signal of the input unit (170).

[0049] The memory (182, MEMORY) is connected to the central processing unit (181). The memory (182) may be installed locally or remotely as a computer-readable recording medium and may be at least one memory that is readily available, such as random access memory (RAM), ROM, a floppy disk, a hard disk, or any digital storage form.

[0050] A support circuit (183) is coupled with a central processing unit (181) to support typical operation of the processor. This support circuit (183) may include a cache, power supply, clock circuit, input / output circuit, subsystem, etc.

[0051] In this embodiment, the motor controller (180) controls the operation of the BLDC motor (130) based on the input signal of the input unit (170) so that the ventilation fan (110) can rotate at a predetermined speed and direction, and such a series of control processes can be stored in memory (182). Typically, a software routine can be stored in memory (182). The software routine can also be stored or executed by another central processing unit (not shown).

[0052] Although the process according to the present invention has been described as being executed by software routines, at least some of the processes of the present invention may also be performed by hardware. As such, the processes of the present invention may be implemented by software executed on a computer system, by hardware such as an integrated circuit, or by a combination of software and hardware.

[0053] According to the present embodiment, which operates based on the structure described above, it is possible to reduce electricity costs by approximately 50% or more with low power consumption and provide a comfortable environment because it operates with no or reduced noise. Furthermore, it enables efficient energy management by allowing multiple group monitoring and control, and maintains an optimal operating state suitable for the application because it can operate at a constant speed regardless of load fluctuations.

[0054] (2nd Example)

[0055] FIG. 4 is a schematic structural diagram of a livestock barn to which a fan ventilation system according to a second embodiment of the present invention is applied, and FIG. 5 is a control block diagram of the fan ventilation system of the livestock barn applied to FIG. 4.

[0056] Referring to these drawings, the fan ventilation system according to the present embodiment can be applied to a livestock barn (1). The livestock barn (1) includes a wall section (10) and a roof (20). A livestock housing space (40) is formed inside by the structure of the wall section (10) and the roof (20).

[0057] Various livestock, such as chickens, sheep, pigs, and cows, can be raised in the livestock housing space (40). A door (30) is provided on the front of the wall (10) to allow access to and from the livestock housing space (40).

[0058] The fan ventilation system according to the present embodiment applicable to a livestock barn (1) having such a structure includes a plurality of, for example, three first to third large fan driving BLDC motor structures (100a to 100c) and a system control unit (280).

[0059] The BLDC motor structures (100a to 100c) for driving the first to third large fans are each provided in the wall sections (10) of the livestock barn (1) that form each zone (Z1 to Z3) when the livestock barn (1) is divided into multiple zones, such as the first to third zones (Z1 to Z3), and serve to ventilate the air within the livestock housing space (40) inside the livestock barn (1). Here, the term "division" refers to a virtual space concept rather than a physically constructed wall.

[0060] As schematically illustrated in Fig. 4, a livestock barn (1) is usually constructed to be long in order to raise a large number of livestock, but if only one large fan driving BLDC motor structure (100a) is applied to such a long livestock barn (1), the efficiency is bound to be very low.

[0061] Thus, considering the capacity of one large fan driving BLDC motor structure (100a~100c), the long shaft (1) is divided into three first to third zones (Z1~Z3), and one large fan driving BLDC motor structure (100a~100c) is applied to each zone (Z1~Z3).

[0062] The structure of the BLDC motor structures (100a to 100c) for driving large fans is the same as that of the previously described embodiment. That is, all of the BLDC motor structures (100a to 100c) for driving large fans, as previously described in relation to FIGS. 1 and 2, comprise a ventilation fan (110) rotatably arranged for ventilation of a livestock barn (1), a fan protection net (120) surrounding and protecting the ventilation fan (110), a BLDC motor (130, Brushless DC Motor) coupled to one side of the fan protection net (120) and connected to the ventilation fan (110) through a rotation shaft, and equipped with a power controller (131) capable of power control for generating power to rotate the ventilation fan (110), an input unit (170) for inputting a signal for operation or stop of the ventilation fan (110), and a motor that controls the operation of the BLDC motor (130) based on the input signal of the input unit (170) so that the ventilation fan (110) can rotate at a predetermined speed and direction. Includes a controller (180).

[0063] Meanwhile, for controlling the fan ventilation system according to the present embodiment, zone temperature measuring devices (291~293) and a system control unit (280) are applied.

[0064] Zone temperature measuring devices (291~293) are each provided on the inner wall of the barn (1) in the corresponding zone (Z1~Z3) corresponding to the installation location of the large fan driving BLDC motor structures (100a~100c), and serve to measure the internal temperature of the corresponding zone (Z1~Z3). Since the barn (1) of this embodiment is divided into three first to third zones (Z1~Z3), there are also three zone temperature measuring devices (291~293) corresponding to them.

[0065] The system control unit (280) is connected to the BLDC motor structures (100a to 100c) for driving large fans and controls the operation of the BLDC motor structures (100a to 100c) for driving large fans individually. That is, in this embodiment, the system control unit (280) controls the operation of the BLDC motor structures (100a to 100c) for driving large fans individually based on the corresponding temperature values ​​of the zone temperature measuring devices (291 to 293).

[0066] Since the BLDC motor structures (100a to 100c) for driving large fans are controlled individually, all BLDC motor structures (100a to 100c) for driving large fans can be turned on, at least one of them can be turned on, or all BLDC motor structures (100a to 100c) for driving large fans can be turned off. A system control unit (280) that performs this role may include a central processing unit (281, CPU), memory (282, MEMORY), and a support circuit (283, SUPPORT CIRCUIT).

[0067] The central processing unit (281) is connected to the BLDC motor structures (100a to 100c) for driving large fans in this embodiment and may be one of various computer processors that can be industrially applied to individually control the operation of the BLDC motor structures (100a to 100c) for driving large fans.

[0068] The memory (282, MEMORY) is connected to the central processing unit (281). The memory (282) may be installed locally or remotely as a computer-readable recording medium and may be at least one memory that is readily available, such as random access memory (RAM), ROM, a floppy disk, a hard disk, or any digital storage form.

[0069] A support circuit (283) is coupled with a central processing unit (281) to support typical operation of the processor. This support circuit (283) may include a cache, power supply, clock circuit, input / output circuit, subsystem, etc.

[0070] In this embodiment, the system control unit (280) individually controls the operation of BLDC motor structures (100a to 100c) for driving large fans based on the corresponding temperature values ​​of zone temperature sensors (291 to 293), and such a series of control processes can be stored in memory (282). Typically, a software routine can be stored in memory (282). The software routine can also be stored or executed by another central processing unit (not shown).

[0071] Although the process according to the present invention has been described as being executed by software routines, at least some of the processes of the present invention may also be performed by hardware. As such, the processes of the present invention may be implemented by software executed on a computer system, by hardware such as an integrated circuit, or by a combination of software and hardware.

[0072] Even when this embodiment is applied, it is possible to save approximately 50% or more of electricity costs with low power consumption, and since it operates with no or reduced noise, it can provide a comfortable environment. In addition, it enables efficient energy management by allowing multiple group monitoring controls, and since it can operate at a constant speed regardless of load fluctuations, it can maintain an optimal operating state suitable for the application.

[0073] (3rd Example)

[0074] FIG. 6 is a schematic structural diagram of a livestock barn to which a fan ventilation system according to a third embodiment of the present invention is applied, and FIG. 7 is a control block diagram of the fan ventilation system of the livestock barn applied to FIG. 6.

[0075] With reference to these drawings, the present embodiment is substantially similar to the second embodiment described above. However, it differs in that a door opening detector (391) is attached to the door (30) to detect whether the door (30) is open, and the operation of the door opening detector (391) is checked by a timer (392). The door opening detector (391) and the timer (392) are connected to a system control unit (380).

[0076] A door opening detector (391) detects whether the door (30) is open, and a timer (392) checks the time the door opening detector (391) has operated. For example, if the time the door (30) is open is set time, such as at least several minutes, it can be recognized that the door (30) has been opened and the livestock have been sent out of the barn (1). In this case, unnecessary power waste can be reduced by controlling the operation of the large fan driving BLDC motor structures (100a~100c) to be forcibly stopped (OFF).

[0077] Even when this embodiment is applied, it is possible to save approximately 50% or more of electricity costs with low power consumption, and since it operates with no or reduced noise, it can provide a comfortable environment. In addition, it enables efficient energy management by allowing multiple group monitoring controls, and since it can operate at a constant speed regardless of load fluctuations, it can maintain an optimal operating state suitable for the application.

[0078] (Fourth Example)

[0079] FIG. 8 is a schematic structural diagram of a livestock barn to which a fan ventilation system according to the fourth embodiment of the present invention is applied, and FIG. 9 is a control block diagram of the fan ventilation system of the livestock barn applied to FIG. 8.

[0080] With reference to these drawings, the present embodiment is substantially similar to the aforementioned third embodiment. However, the present embodiment differs in that a warning light (492) is additionally installed in the first zone (Z1) area adjacent to the door (30), and its operation is controlled by a system control unit (480).

[0081] That is, when the door (30) is briefly opened for a few seconds to a few minutes to allow a worker to enter or exit, livestock must not escape from the barn (1). Therefore, when the door (30) is opened in this way, the warning light (492) is flashed by the system control unit (480) to induce the livestock to move away from the door (30).

[0082] Even when this embodiment is applied, it is possible to save approximately 50% or more of electricity costs with low power consumption, and since it operates with no or reduced noise, it can provide a comfortable environment. In addition, it enables efficient energy management by allowing multiple group monitoring controls, and since it can operate at a constant speed regardless of load fluctuations, it can maintain an optimal operating state suitable for the application.

[0083] As such, the present invention is not limited to the described embodiments, and it is obvious to those skilled in the art that various modifications and variations can be made without departing from the spirit and scope of the invention. Accordingly, such modifications or variations should be deemed to fall within the scope of the claims of the present invention. Explanation of the symbols

[0084] 100: BLDC motor structure for driving large fans 110: Ventilation fan 120: Fan protective mesh 130: BLDC motor 131: Power controller 140: Motor support 170: Input section 180: Motor controller

Claims

Claim 1 delete Claim 2 delete Claim 3 When dividing a livestock barn into multiple zones, a plurality of large fan driving BLDC motor structures are provided on the walls of the livestock barn forming each zone and ventilate the air within the livestock housing space inside the livestock barn; a system control unit connected to the large fan driving BLDC motor structures and individually controls the operation of the large fan driving BLDC motor structures; and a plurality of zone temperature measuring devices are provided on the inner walls of the livestock barn of the corresponding zone corresponding to the installation location of the large fan driving BLDC motor structures and measure the internal temperature of the corresponding zone. The system includes a door opening detector, which is a sensor that detects whether the door of the livestock barn is open and transmits this to the system control unit, and which detects when the door remains open for a certain period of time or longer and controls the operation of the BLDC motor structure for driving the large fan to automatically stop; the system control unit individually controls the operation of the BLDC motor structures for driving the large fan based on the corresponding temperature values ​​of the zone temperature measuring devices; and the BLDC motor structure for driving the large fan comprises: a ventilation fan rotatably provided for ventilation of the livestock barn; a fan protection mesh body that surrounds and protects the ventilation fan; a BLDC motor (Brushless DC Motor) coupled to one side of the fan protection mesh body and connected to the ventilation fan through a rotating shaft, and equipped with a power controller capable of power control that generates power for the ventilation fan to rotate; an input unit that inputs a signal for the operation or stop of the ventilation fan; and a motor controller that controls the operation of the BLDC motor to allow the ventilation fan to rotate at a predetermined speed and direction based on the input signal of the input unit. A fan ventilation system for a livestock barn characterized by including a motor support connected to the back surface of the fan protection mesh and supporting the BLDC motor. Claim 4 delete

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