KR102506662B1 - Actuator and system for controlling damper using the same - Google Patents

Abstract

A system for effectively controlling a damper for regulating the amount of outside air flowing into a clean room is disclosed. The present system may include a sensing information collection unit, an actuator that directly controls the damper, and a controller. By applying this system, power efficiency can be improved.

Description

Actuator and damper control system using the same {ACTUATOR AND SYSTEM FOR CONTROLLING DAMPER USING THE SAME}

The present disclosure relates to an actuator for adjusting the amount of external air flowing into a predetermined space and a damper control system using the same.

A clean laboratory refers to a clean laboratory area designed with a clean room function for trace element analysis or isotope analysis. Most of the research conducted inside the clean laboratory has a very small amount of the target component, and a filter system, a constant temperature and humidity device, and an air circulation device are applied to prevent contamination by airborne particles generated during the experiment. .

The filter system is a particle collection filter that is passed through when outside air is introduced, and may include a pre filter, medium filter, HEPA filter, ULPA filter, etc. Coarse-sized particles are removed through the pre filter and sequentially As it passes through the ULPA filter, more than 99.99% of the 0.1 μm size can be removed.

The air entering the clean laboratory moves from the top to the bottom of the laboratory, forms a laminar flow, and discharges pollutants additionally generated inside the laboratory to the outside.

At this time, if the heat load inside the laboratory is high, there may be a problem of diffusion of contaminants that need to escape. also regulates

In the air circulation system, some of the discharged air is mixed with outside air and recirculated in order to lower the operating load of the constant temperature and humidity system and the filter system.

Inside the clean laboratory, a forced exhaust device (hood) is installed according to the use of chemicals, and there are points where exhaust occurs, such as doors and relief dampers. pressure) is maintained.

The positive pressure to be maintained in a small-scale clean laboratory is preferably 0.5 to 1.0 mmAq (4.9 Pascal to 9.8 Pascal) between the clean room and the clean changing room based on the differential pressure between rooms. The load of the device increases, causing electrical energy loss and reducing the lifespan of the filter system.

Accordingly, it is desirable to control the amount of external air used to the extent of maintaining the function of the clean laboratory. The amount of external air in the clean laboratory can be adjusted by opening the manual outdoor air damper connected to the constant temperature and humidity device. In a small clean laboratory, it is rare to use the amount initially set by the manufacturer and adjust the damper. The amount of opening of the damper set by the manufacturer is based on the clean filter device at the beginning of the clean laboratory installation and the fan of the new air circulation device, or is set to the maximum setting value that can be opened. occurs

Accordingly, a method for efficiently controlling the inflow of external air is required.

On the other hand, the above information is presented only as background information to help the understanding of the present invention. No determination has been made, nor is any assertion made, as to whether any of the foregoing is applicable as prior art with respect to the present invention.

Registered Patent Publication No. 10-2056452 (registration date: 2019.12.10)

The present invention has been made to solve the above-mentioned problems, and an embodiment of the present invention is a damper control system for setting the optimal outdoor air inflow within the limit of maintaining the function of a clean laboratory (hereinafter referred to as “clean room”) is to provide

The technical problems to be achieved in the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the description below. You will be able to.

An actuator for controlling a damper according to an embodiment of the present invention includes an actuator body including a linear motor for controlling a linear stick; and a hole accommodating the manual control unit of the damper that controls the amount of outside air flowing into the clean room and coupled to the end of the linear stick, converting the linear force transmitted through the linear stick into a turning force that rotates the manual control unit to control the damper. It may include an actuator head including a force conversion unit to do.

The actuator body and actuator head are detachable.

A damper control system according to an embodiment of the present invention includes a sensing information collection unit for collecting sensing information of inside and outside of a clean room; an actuator controlling a damper that adjusts the amount of outside air flowing into a predetermined space; and a controller.

The actuator includes an actuator body including a linear motor for controlling a linear stick, a hole for accommodating the manual control unit of the damper, and coupled to an end of the linear stick and rotating the manual control unit using a linear force transmitted through the linear stick. It may include an actuator head including a force converting unit that controls the damper by converting it into a turning force.

The controller sets the moving distance of the linear stick based on the change in positive pressure, which is the difference between the positive pressure in the clean room and the reference positive pressure collected from the sensing information collection unit, and the learning coefficient value related to the moving distance of the linear stick. Based on the moving distance of the linear stick, it may be configured to control the linear motor.

The controller of the damper control system according to another embodiment of the present invention may be configured to calculate the moving distance of the linear stick by receiving information collected through the sensing information collection unit in a pre-learned learning coefficient determination model.

According to various embodiments of the present invention for realizing the above object, since the optimal outdoor air inflow amount can be set within the limit of maintaining the function of the clean room, power efficiency can be improved, and the replacement time of the filter can be delayed. and the exact amount of outside air inflow can be determined.

The effects obtainable in the present invention are not limited to the effects mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the description below. will be.

1 is a view for schematically explaining a process of supplying outside air to a clean room using a damper control system according to an embodiment of the present invention;
2 is a system block diagram showing the configuration of a damper control system according to an embodiment of the present invention;
3 to 7 are views for explaining the structure or function of an actuator for controlling a damper according to an embodiment of the present invention;
8 and 9 are sequence diagrams for explaining the operation of the damper control system according to an embodiment of the present invention, and
10 is a diagram for explaining the operation of a damper control system according to an embodiment of the present invention.

Hereinafter, various embodiments of the present invention will be described in more detail with reference to the accompanying drawings. However, in describing the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the gist of the present invention, a detailed description thereof will be omitted.

1 is a diagram schematically illustrating a process of supplying outside air to a clean room using a damper control system 1000 according to an embodiment of the present invention.

First of all, a clean room (CL, Clean Laboratory, Clean Room) is a space in which the concentration of particles in the air is controlled, a space in which the generation, inflow and retention of dust is minimized, and a room in which temperature, humidity, and pressure are controlled according to demand. (or laboratory).

The clean room CL may be managed at a predetermined positive pressure, which is to allow air for purification to naturally flow to the outside while outside contaminated air does not penetrate. The higher the positive pressure, the more effective it is to prevent the penetration of polluted air from outside, but the higher the required power, the higher the operating cost.

In addition, in the clean room (CL), contaminants spread when the heat load is high, and when the humidity is low, the exhaust time increases due to static electricity. Therefore, it is important to maintain the constant temperature and humidity in the CL. For this purpose, the constant temperature and humidity device 300 is placed. It can be.

The exhaust module 400 of the clean room CL may output air inside the clean room CL to the outside. The exhaust module 400 may include an access door and a relief damper, but the embodiment is not limited thereto.

Hereinafter, a process in which outside air is introduced and circulated will be described.

The outside air is outside air and is supplied (A1) to the outside air conditioning device 200 . The outdoor unit 200 may include a duct. Air passing through the external control device 200 may pass through the actuator 100 (DCA) for controlling the damper.

Here, the actuator 100 may adjust the amount of air entering the constant temperature learning device 300 . Specifically, the actuator 100 is connected to a manual control unit of a damper that controls the amount of air flowing into the clean room CL, and according to the control of the damper control system 1000, reduces the amount of air flowing into the clean room CL, can be increased

As an optional embodiment, the actuator 100 may be disposed at various positions capable of controlling the inflow of outside air, rather than at a position immediately adjacent to the external air conditioning device 200 .

The air introduced into the constant temperature and humidity device 300 may be introduced into the clean room by moving through the closed air circulation passage 600 (A3 to A8). Air introduced into the clean room CL may be recirculated through the recirculation module 500 and the air circulation passage 600 or sent out through the exhaust module 400 as needed.

At this time, the air can reduce contaminants as it passes through a plurality of filters (F1 to F4). The filters include a HEPA filter (F1), pre-filters (F2, F4), a medium filter (F3), a woolpa filter, and the like. However, the embodiment is not limited thereto.

2 is a system block diagram showing the configuration of a damper control system 1000 according to an embodiment of the present invention.

The damper control system 1000 is a system that controls a damper that controls the inflow of outside air, and includes a sensing information collection unit 910, various sensors 920, a memory 930, an actuator 100 that controls the damper, and a controller. (990) and the like. However, since the above components are not essential components of the damper control system 1000, more components or fewer components may be included.

The sensing information collection unit 910 is a module that collects sensing information inside and outside the clean room, and includes a first sensing information collection unit 911 that collects external data and a second sensing information collection unit 913 that collects internal data. can do.

The first sensing information collection unit 911 may collect information such as the concentration of fine dust in the air, the temperature of the outside air, and the humidity from the external atmospheric information system 10 . As an optional embodiment, the external air quality information system 10 may include a system included in the Korea Environment Corporation, Korea Meteorological Administration, and the like, and various systems outside the clean room building.

The second sensing information collection unit 913 may collect sensing information of a clean room or a building in which a clean room is located. The second sensing information collection unit 913 may collect various types of sensing information from various internal sensors 920 . For example, the various internal sensors 920 include an outdoor air velocity and air volume sensor 921, a current sensor 923 of a constant temperature and humidity device, a fine dust sensor, and a clean room sensor (eg, an exhaust module, a current sensor of a polluted device, etc.) can include As an optional embodiment, the sensing information collection unit 910 may be disposed inside the actuator 100 that controls the damper.

The actuator 100 may control a damper for adjusting the amount of outside air flowing into the clean room. The actuator 100 may adjust the amount of opening of the damper, and may open or close the opening of the damper. As an optional embodiment, the actuator 100 may be implemented to control the amount of outside air flowing into a predetermined space other than the clean room.

The actuator 100 may include a communication unit 110 , a linear motor 120 , a force converter 130 , a display 140 and a power supply unit 150 .

The communication unit 110 is a module for receiving various sensing information and control signals. As an optional embodiment, the communication unit 110 may include a module supporting MQTT communication, mobile communication, and short-distance communication (eg, Bluetooth, Wi-Fi communication, etc.).

The linear motor 120 is an electric module that moves a linear stick connected to the linear motor 120 back and forth.

The force conversion unit 130 may convert the linear force generated by the linear motor 120 into a turning force for rotating the control unit for controlling the damper.

The display 140 may output various information according to the control of the controller 990 .

The power supply unit 150 is a module that supplies power to the actuator 100 and may include a manual switch that manually controls power supply to the actuator.

The memory 930 may store various information collected through the sensing information collection unit 910 and a learning coefficient setting model 930M. As an optional embodiment, the learning coefficient setting model 930M may be implemented as an artificial intelligence-based model.

Controller 990 is the brain that controls components. As an optional embodiment, the controller 990 may be located inside the actuator 100 .

Hereinafter, the structure or function of the actuator 100 for controlling the damper according to an embodiment of the present invention will be described with reference to FIGS. 3 to 7 .

3 shows an actuator 100 controlling a damper according to an embodiment of the present invention, and FIGS. 4(a) and 4(b) describe a process in which the actuator 100 is attached to an actual damper and operates. It is a drawing for Figure 5 is a view for explaining the structure of the body (Body) of the actuator 100 according to an embodiment of the present invention, Figures 6 (a) and 6 (b) is an actuator according to an embodiment of the present invention ( 100) is a diagram for explaining the structure of the head.

The actuator 100 may include an actuator body and an actuator head.

The actuator body may include a linear motor 120 that controls the linear stick 123 . The actuator body may include a switch SW1 for manually turning on/off the display 140 and power supply.

The actuator head (Head) is coupled to the end of the linear stick 123 and the hole 115 accommodating the manual control unit 430 of the damper Dam that controls the amount of outside air flowing into the clean room, and through the linear stick 123 It may include a force converter 130 that controls the damper Dam by converting the transmitted linear force into a turning force for rotating the manual control unit. Here, the manual control unit 430 may include a stick extended to the control unit that controls the actual damper.

The force converter 130 may move linearly on a moving line located inside the actuator head. When the linear stick 123 moves forward, the force conversion unit 130 may control the manual control unit 430 to increase the amount of outside air while moving in one direction on the movement line (FIG. 4(b)). Then, the damper (Dam) can send a large amount of outside air to the clean room.

In addition, when the linear stick 123 moves backward, the force conversion unit 130 may be configured to control the manual control unit 430 to reduce the amount of outside air while moving in a different direction on the movement line (FIG. 4(a)). ). Then, the damper (Dam) can block the outside air flowing into the clean room.

Referring to FIG. 5 , the actuator body may include an outer case B2 and an inner body B1. The inner body B1 may include a linear motor 120 , a linear stick 123 and a display 140 .

6(a) and 6(b) , actuator heads (Head1, Head2) having different shapes according to an embodiment of the present invention may be implemented.

The difference between the two actuator heads (Head1, Head2) is the presence or absence of the fixing module 170 for fixing the manual control unit disposed inside the hole 115. The fixing module 170 is a module in which the hole 115 more firmly fixes the manual control unit 430 of the damper. When a difference in size between the hole 115 and the manual control unit 430 occurs, it can be used.

7 is a view for explaining a situation in which the actuator body (B1, Body) and the actuator head (Head) of the actuator 100 are attached and detached according to an embodiment of the present invention.

The actuator body (B1, Body) may control the linear motor 120 to move the linear stick 123 forward and backward.

The actuator head may be attached to or detached from the actuator body through the linear stick 123 and the force converter 130 .

The force conversion unit 130 can move linearly on the movement line (710), and the movement line along which the linear stick 123 moves includes an open hole 720 so that the movement of the force conversion unit 130 becomes easy. can

In particular, when the damper is manually controlled by a user after the linear stick 123 is separated, a space margin is created in the actuator head, so that the movement of the force converter 130 can be facilitated.

The actuator head may include a pin structure 139 coupling or uncoupling the coupling between the linear stick 123 and the force converter 130 .

The actuator body B1 (Body) and the actuator head (Head) may be detachably configured by the pin structure 139 . Specifically, when the ring of the pin structure 139 receives force downward (F1), the pin structure 139 rises, so that the linear stick 123 and the force converter 130 may be uncoupled. As an alternative embodiment, an actuator that is not provided with a ring and is detached by applying force in an upward direction of the pin structure 139 may also be implemented.

8 and 9 are sequence diagrams for explaining the operation of the damper control system 1000 according to an embodiment of the present invention, and FIG. 10 shows the operation of the damper control system 1000 according to an embodiment of the present invention. It is a drawing for explanation.

Referring to FIG. 8 , the damper control system 1000 collects sensing information of the inside and outside of the clean room through the sensing information collection unit 910 (S710).

The damper control system 1000 may set the opening amount of the damper to the maximum when ventilation in the clean room is urgently needed. Specifically, the damper control system 1000 may set the damper opening amount to the maximum when the level of dust in the clean room exceeds a predetermined reference value, the exhaust module is operating, or a pollution generating device is operating (S720). S770).

The damper control system 1000 may perform step S720 through a dust detection sensor in the clean room and a current sensor monitoring each module (exhaust module, pollution generating device, etc.).

As an optional embodiment, the damper control system 1000 may set the damper opening amount to the maximum when the measured current of the pollution-producing device exceeds 5A, which means equipment operation, or a predetermined value based on the dust size of 0.3 μm.

After step S720, the damper control system 1000 may calculate a change in positive pressure, which is a difference between the current positive pressure in the clean room and the reference positive pressure, when ventilation in the clean room is not urgent (S730).

Here, the damper control system 1000 may set a standard positive pressure of the clean room, which may appropriately cope with the inflow of pollutants and may be a value considering a safety margin (eg, 25%). As an optional embodiment, the standard positive pressure may be 6 Pascal, but may vary depending on the application conditions of the clean room.

The damper control system 1000 may calculate a moving distance for the linear stick 123 of the linear motor 120 corresponding to the change in positive pressure. Here, the damper control system 1000 may have information about the moving distance of the linear stick 123 corresponding to the positive pressure in the clean room in advance.

Specifically, the damper control system 1000 may calculate the most suitable movement distance relationship of the linear stick 123 versus the change in positive pressure, which may vary depending on the applied clean room. However, it may be preferable to move the linear stick 123 in units of millimeters relative to the change in positive pressure.

For example, the damper control system 1000 may calculate the movement distance of the linear stick as shown in [Equation 1] below.

[Equation 1]

Travel distance of linear stick (mm) = -0.0414 + (6.667 * positive pressure change) - (0.1783 * (positive pressure change) ² )

[Equation 1] is used when the positive pressure change amount and the moving distance of the linear stick 123 are applied in a specific clean room. However, according to the environment of the clean room, the values may be set so that the linear stick can move more precisely according to the amount of positive pressure change.

The damper control system 1000 corrects the moving distance of the linear stick 123 based on the learning coefficient because the amount of change in positive pressure may change over time, when the filter is wet due to weather, when the filter is clogged, or when the fan is aged It can be done (S750).

The damper control system 1000 may control the linear motor 120 according to the corrected moving distance of the linear stick 123 .

That is, the damper control system 1000 may set the movement distance of the linear stick based on the positive pressure change amount and the learning coefficient value related to the movement distance of the linear stick.

The learning factor can be divided into several stages according to the external humidity and can be divided into several stages according to the positive pressure of the clean room. For example, if the external humidity is divided into 20 levels and the positive pressure in the clean room is set to 30 levels, a total of 600 learning coefficients may be grouped, and all default settings may be 0.

Each value of the learning coefficient may be updated and used over time. As an optional embodiment, the learning coefficient may further include not only external humidity and positive pressure in the clean room, but also temperature information, time information, season information, and the like.

9 is a sequence diagram illustrating a process of updating a value of a learning coefficient according to an embodiment of the present invention.

As described above, the damper control system 1000 first sets a learning coefficient group (S810).

The damper control system 1000 first checks whether the damper opening amount is set to the maximum (S820). Since this is a case where exhaust is required in the clean room when the damper opening amount is set to the maximum, it may not be appropriate to set the learning coefficient.

When the damper opening degree is not the maximum (S820), the damper control system 1000 controls the linear stick according to the change in positive pressure and measures the positive pressure in the clean room again (S840).

The damper control system 1000 may check whether the positive pressure is properly set even though the movement distance of the linear stick corresponding to the initially calculated amount of change in positive pressure is controlled. That is, the damper control system 1000 may calculate the moving distance of the linear stick corresponding to the amount of change in positive pressure if it is set as the initial setting. can

If the damper control system 1000 is greater than A (eg, when the reference positive pressure is 6 Pascal and the positive pressure difference exceeds 2 Pascal) between the measured positive pressure and the reference positive pressure (S850), the value of the learning coefficient is set to the existing After setting the learning coefficient to be larger than the learning coefficient by α (eg, 0.01) (S860), the value of the corresponding learning coefficient may be updated (S870).

In this case, when controlling the next linear stick, the damper control system 1000 substitutes the original movement control value + (original movement control value * (the corresponding learning coefficient value)) to advance the linear stick more, thereby reducing the damper can open up more.

If, after control, the damper control system 1000 recalculates the positive pressure change amount greater than B and less than A (S880), the corresponding learning coefficient value may be used as the existing learning coefficient value (S910, S870). The value of B may be 0 (Pascal), but may be greater than 0 and less than 2.

If the positive pressure change amount calculated again after control is negative, the damper control system 1000 may reduce the value of the learning coefficient by β (S890) and update it (S870).

In this case, the damper control system 1000 may move the linear stick less than the movement distance set in the next control, and the opening of the damper may be relatively reduced.

The above-mentioned reference positive pressure, positive pressure difference (A, B), and adjustment values (α, β) of the learning coefficient may all be changed according to the applied clean room. In particular, the adjustment values (α, β) of the learning coefficient may be properly set when the immediately measured positive pressure in the clean room is closer to the reference positive pressure when the learning coefficient is adjusted.

10 is a diagram for explaining a damper control system 1000 applying an artificial intelligence-based learning coefficient setting model 930M according to an embodiment of the present invention.

The damper control system 1000 may generate a learning coefficient setting model 930M based on supervised learning.

First, in the learning step, the damper control system 1000 inputs inputs (in) including positive pressure information, temperature information, humidity information, time information, season information, etc. to the learning coefficient determination model 930M to move the linear stick The distance (out) can be calculated. At this time, the movement distance of the linear stick may be previously input as a label.

In this way, the damper control system 1000 may train the learning coefficient setting model 930M by calculating the moving distance out of the linear stick based on various inputs in.

The damper control system 1000 receives the information collected through the sensing information collection unit 910 in the pre-learned learning coefficient determination model 930M and calculates the moving distance of the linear stick, even if the learning coefficient is not used. The movement distance of the linear stick can be calculated.

On the other hand, this specification is not intended to limit the present invention to the specific terms presented. Therefore, although the present invention has been described in detail with reference to the above-described examples, those skilled in the art may make alterations, changes, and modifications to the present examples without departing from the scope of the present invention. The scope of the present invention is indicated by the following claims rather than the detailed description above, and all changes or modifications derived from the meaning and scope of the claims and their equivalent concepts should be interpreted as being included in the scope of the present invention. do.

Claims (8)

delete delete delete delete As a damper control system,
a sensing information collection unit that collects sensing information inside and outside the clean room;
an actuator controlling a damper that adjusts the amount of outside air flowing into a predetermined space; and
contains a controller;
The actuator,
An actuator body including a linear motor for controlling a linear stick, a hole for accommodating the manual control unit of the damper, a fixing module for fixing the manual control unit disposed inside the hole, coupled to the end of the linear stick and through the linear stick An actuator head including a force converter for controlling the damper by converting the transmitted linear force into a turning force for rotating the manual control unit, and a pin structure for coupling or uncoupling the combination of the linear stick and the force converter. contains,
The power converter,
Moving linearly on a copper line located inside the actuator head,
When the linear stick moves forward, the manual control unit is controlled to increase the amount of outdoor air while moving in one direction on the movement line;
When the linear stick moves backward, it is configured to control the manual manipulation unit to reduce the amount of outside air while moving in a different direction on the movement line,
The movement line along which the linear stick moves is configured as an open type in the actuator head,
The actuator body and the actuator head are detachably configured by the pin structure,
The damper control system calculates the moving distance of the linear stick based on the following [Equation 1],
[Equation 1]
Travel distance of the linear stick (mm) = -0.0414 + (6.667 * positive pressure change) - (0.1783 * (positive pressure change) ² ),
The controller,
Correcting the movement distance of the linear stick based on the change in positive pressure, which is the difference between the positive pressure in the clean room and the reference positive pressure collected from the sensing information collection unit, and the learning coefficient value related to the moving distance of the linear stick;
Based on the corrected moving distance of the linear stick, configured to control the linear motor;
The controller,
Create a group of learning coefficients according to a predetermined criterion;
configured to default values of a plurality of learning coefficients included in the learning coefficient group to 0;
The actuator controls the amount of air entering the constant temperature and humidity device,
Air entering the constant temperature and humidity device is introduced into the clean room through a sealed air circulation passage, and the air introduced into the clean room is moved to the air circulation passage through a recirculation module or output to the outside through an exhaust module. Damper control system. delete According to claim 5,
The controller,
Controlling the linear motor based on a predetermined learning coefficient value included in the learning coefficient group;
After re-measuring the positive pressure in the clean room, if the positive pressure is greater than the first difference from the reference positive pressure, the corresponding learning coefficient value is increased by a predetermined value and updated, and if it is less than the first difference and greater than or equal to the second difference, the corresponding learning coefficient value Damper control system configured to use as it is and update the corresponding learning coefficient value by decreasing it by a predetermined value when it is less than the second difference.
delete

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