KR20210046547A - Air circulation control system with double damper structure to reduce the use of hepa filter and energy - Google Patents

Abstract

Disclosed is an air circulation control system of a dual damper structure capable of HEPA filter usage saving and energy saving. The air circulation control system includes: a minimum outside air vent having a size large enough to introduce a preset minimum outside air amount, and including a minimum outside air damper and a HEPA filter; a general outside air vent composed of a vent different from the minimum outside air vent to form a dual structure with the minimum outside air vent, having a size large enough to introduce a general outside air amount deducting the preset minimum outside air amount from a preset maximum outside air amount, and including a general outside air damper; an outside air quality measurement part measuring the quality of air outside a building by using a fine dust sensor and a carbon dioxide sensor; an inside air quality measurement part measuring the quality of air inside the building by using a fine dust sensor and a carbon dioxide sensor; a required ventilation amount calculation part calculating a required ventilation amount within a range which is no more than the preset maximum outside air amount by using the quality of the outside air measured by the outside air quality measurement part and the quality of the inside air measured by the inside air quality measurement part; and a dual damper control part independently controlling the minimum outside air damper and the general outside air damper such that the minimum outside air amount or the required ventilation amount can be introduced, by using the quality of the outside air measured by the outside air quality measurement part.

Description

Air circulation control system with double damper structure that can reduce the use of HEPA filter and save energy {AIR CIRCULATION CONTROL SYSTEM WITH DOUBLE DAMPER STRUCTURE TO REDUCE THE USE OF HEPA FILTER AND ENERGY}

The present invention relates to prevention of indoor pollution due to fine dust and carbon dioxide for buildings and to maintain indoor comfort, and in more detail, two ventilating openings each having a damper capable of adjusting the amount of air inflow to the air purification system of the building. By installing a HEPA filter and controlling the damper, it is possible to reduce the replacement cycle due to the use of a relatively expensive HEPA filter to block fine dust while maintaining high indoor air quality, and save energy and reduce the use of the HEPA filter and save energy. It is an object of the present invention to provide a dual damper structure air circulation control system.

In order to maintain a pleasant indoor environment from air pollution caused by fine dust and various smoke, indoor air management is important.

In order to manage indoor air, it is necessary to periodically ventilate the inside air and outside air to lower the concentration of carbon dioxide and supply fresh oxygen inside the building. For ventilation of such a building, it is essential to provide an air purification system.

The building's air purification system is a section that purifies, cools, dehumidifies, heats, or humidifies the air, which may have a function to blow into each room by installing a fan in this section.

In general, in large-scale buildings, a central air purification system is used as an overall control method or an area control method, and it can be classified as controlling air conditioning in a central air conditioner room or an air conditioner room for each area.

In general, an air purification system may have a vent and a damper that controls the amount of air that can be introduced or discharged through the vent, and by controlling the opening and closing of the damper, fresh air from outside the building may be supplied to the interior.

In addition, many technologies are currently applied to improve internal air quality by purifying the air flowing from the outside to the inside using a HEPA filter. However, due to the cost and energy loss of the HEPA filter, the entire air is removed to a large-scale building. Difficulties exist in inflowing through.

The present invention is an air purification system in which external air containing fine dust or soot and having relatively poor air quality is purified using a HEPA filter and then introduced, a structure having a ventilation opening including a HEPA filter and a general ventilation opening at the same time. The purpose of using the HEPA filter for external air purification and minimizing energy loss is.

In particular, it is an object of the purpose of not requiring additional cost and space by separately adding or not separating the ventilation passages by using the ventilation openings separated from each other to form a double structure.

In order to achieve the above object, the air circulation control system of the double damper structure capable of reducing the use of the HEPA filter and saving energy according to the present invention has a size capable of inflowing a predetermined minimum amount of outdoor air, and includes a minimum outdoor air damper and a HEPA filter. Minimum outdoor air vents; It is composed of a minimum outdoor air ventilation opening and a different ventilation opening to form a dual structure with the minimum external air ventilation opening, and has a size capable of inflowing the general outdoor air quantity obtained by subtracting the predetermined minimum outdoor air quantity from the preset maximum outdoor air quantity, and includes a general outdoor air damper. General outdoor air vents; An external air quality measuring unit that measures the quality of air outside the building using a fine dust sensor and a carbon dioxide sensor; An indoor air quality measuring unit that measures the quality of air inside the building using a fine dust sensor and a carbon dioxide sensor; A required ventilation amount calculation unit that calculates a necessary ventilation amount in a range less than or equal to a preset maximum outdoor air amount by using the quality of the outside air measured by the external air quality measurement unit and the air quality inside the building measured by the indoor air quality measurement unit; And a dual damper controller that independently controls the minimum outdoor air damper and the general outdoor air damper so that the minimum amount of outdoor air or the required amount of ventilation is introduced by using the quality of the external air measured by the external air quality measuring unit.

The dual damper control unit can maintain the internal air quality by opening the minimum outdoor air damper to allow the inflow of the minimum outdoor air amount by opening the minimum outdoor air damper when the external air quality measured by the external air quality measuring unit is less than a preset standard. have.

The double damper control unit may independently control the general outdoor air damper and the minimum outdoor air damper when the quality of the external air measured by the external air quality measurement unit is greater than or equal to a preset standard to introduce the required ventilation amount calculated by the required ventilation amount calculation unit.

The required ventilation amount calculation unit calculates the required ventilation amount by using the allowable indoor dust concentration, the introduced external air dust concentration, and the indoor dust concentration, and the double damper control unit calculates the measured external air quality above a preset standard, and at the same time is higher than the indoor air quality. When it is high, external air equal to the calculated required ventilation amount can be introduced through the general outdoor air vent by opening the general outdoor air damper.

The required ventilation amount calculation unit calculates the required ventilation amount by using the allowable indoor carbon dioxide concentration, the external air carbon dioxide concentration, and the indoor carbon dioxide amount, and the double damper control unit calculates the measured external air quality above a preset standard, and at the same time, the indoor air quality If it is higher, external air equal to the calculated required ventilation amount may be introduced through the general outdoor air vent opening by opening the general outdoor air damper.

The double damper control unit controls the minimum outdoor air damper so that the minimum amount of outside air flows in when the quality of the outside air measured by the outside air quality measurement unit is less than a preset standard, and filters the outside air into the HEPA filter through the minimum outside air vent. By controlling the outside air damper, the general outside air vents are closed so that outside air that is not filtered by the HEPA filter may not flow in.

The double damper control unit controls the general outdoor air damper according to the size of the required ventilation amount calculated by the required ventilation amount calculation unit when the quality of the external air measured by the external air quality measurement unit is higher than a preset standard, and opens the general outdoor air vent, or By controlling the general outdoor air damper and the minimum outdoor air damper, the minimum outdoor air vent and the general external air vent can be opened at the same time.

When the required ventilation amount calculated by the required ventilation amount calculation unit is less than the general outdoor air quantity obtained by subtracting the preset minimum outdoor air quantity from the preset maximum outside air quantity, the general outdoor air damper is opened and the required ventilation quantity is introduced through the general outdoor air vent. , If the required ventilation calculated by the required ventilation amount calculation unit exceeds the general outside air quantity by subtracting the preset minimum outside air quantity from the preset maximum outside air quantity, open the minimum outdoor air damper and the general outdoor air damper at the same time to open the minimum outdoor air vent and the general outdoor air vent. Through this, the necessary ventilation can be introduced.

The preset minimum amount of outdoor air may be preset based on the internal space of the building, the number of people per unit space, and the amount of outdoor air per person.

The preset maximum amount of outside air may be preset based on the internal space of the building and the number of ventilation.

According to an embodiment of the present invention, the frequency of use of the HEPA filter is minimized by using an air purification system having a dual ventilation structure including a minimum outdoor air vent including a minimum outdoor damper and a HEPA filter, and a general outdoor air vent including a general outdoor damper. It is possible to provide an air purification system that can maintain indoor air quality while maintaining the indoor air quality, thereby reducing the cost of replacing the HEPA filter and the time and work required for the replacement work, and there is an energy saving effect.

1 is a block diagram of an air circulation control system having a dual damper structure capable of reducing use of a HEPA filter and saving energy according to an exemplary embodiment of the present invention.
FIG. 2 is a diagram illustrating that an air circulation control system having a dual damper structure capable of reducing use of a HEPA filter and energy saving according to an embodiment of the present invention is reflected in an air purification system.
3 is a view showing a detailed configuration of an air circulation control system having a dual damper structure capable of reducing the use of a HEPA filter and saving energy according to an embodiment of the present invention, as shown in FIG. 1.
4 is a flowchart of a method for controlling air circulation of a dual damper structure capable of saving energy and reducing use of a HEPA filter according to an exemplary embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those of ordinary skill in the art may easily implement the present invention. However, the present invention may be implemented in various different forms and is not limited to the embodiments described herein.

In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and similar reference numerals are attached to similar parts throughout the specification.

Throughout the specification, when a certain part "includes" a certain component, it means that other components may be further included rather than excluding other components unless specifically stated to the contrary.

Hereinafter, an air circulation control system having a dual damper structure capable of saving energy and reducing use of a HEPA filter according to an exemplary embodiment of the present invention and a method thereof will be described with reference to the drawings.

1 is a block diagram of an air circulation control system having a dual damper structure capable of reducing use of a HEPA filter and saving energy according to an exemplary embodiment of the present invention.

Referring to FIG. 1, the air circulation control system with a double damper structure capable of reducing the use of HEPA filters and saving energy includes an external air quality measuring unit 100, an indoor air quality measuring unit 200, a minimum outdoor air vent 300, and a general outdoor air. It may include a ventilation opening 400, a double damper control unit 500, and a required ventilation amount calculation unit 600.

The external air quality measuring unit 100 may measure the quality of air outside the building using a fine dust sensor or a carbon dioxide sensor.

According to an embodiment of the present invention, a fine dust concentration or a carbon dioxide concentration may be measured using a fine dust sensor and a carbon dioxide sensor, and air quality may be measured by comparing these measured values with a preset air quality standard.

According to an exemplary embodiment of the present invention, a fine dust concentration of 15 μg/m 3 or more may be evaluated as poor air quality as a preset air quality standard.

In addition, according to an embodiment of the present invention, air quality may be measured based on a value reflecting not only the concentration of fine dust but also the concentration of carbon dioxide in the outside air.

According to an embodiment of the present invention, if external air quality is evaluated as poor, it is obvious that the quality of indoor air will deteriorate if external air is introduced directly into the building, so that the filtered air can be introduced through the HEPA filter. External air may be introduced through the minimum external air vent 300.

The indoor air quality measuring unit 200 may measure the quality of air inside the building using a fine dust sensor or a carbon dioxide sensor.

According to an embodiment of the present invention, the indoor air quality measurement unit 200 may include at least one fine dust sensor or a carbon dioxide sensor installed inside a building, and is installed on each floor or at a predetermined location to measure air inside the building. Data that can measure quality can be sensed.

According to an exemplary embodiment of the present invention, a fine dust concentration of 15 μg/m 3 or more may be evaluated as poor air quality as a preset air quality standard.

In addition, according to an embodiment of the present invention, air quality may be measured based on a value reflecting not only the concentration of fine dust but also the concentration of carbon dioxide in the outside air.

According to an embodiment of the present invention, if external air quality is evaluated as poor, it is obvious that the quality of indoor air will deteriorate if external air is introduced directly into the building, so that the filtered air can be introduced through the HEPA filter. External air may be introduced through the minimum external air vent 300.

The minimum outdoor air vent 300 may include a minimum outdoor air damper 310 and a HEPA filter, and external air filtered by the HEPA filter may be introduced into the room by controlling the minimum outdoor air damper 310.

According to an embodiment of the present invention, the minimum outdoor air vent 300 may include a HEPA filter, and the outside air may be filtered and introduced into the room using the HEPA filter. Can be controlled through.

According to an embodiment of the present invention, the minimum outdoor air vent 300 has a size in which a preset minimum amount of outdoor air can be introduced. A minimum amount of outdoor air or a required amount of external air may be introduced through the minimum outdoor air vent 300, filtered using a HEPA filter, and then blown into the room.

According to an embodiment of the present invention, when the measured external air quality is equal to or higher than a preset standard and at the same time is higher than the indoor air quality, the general outdoor air damper 410 is opened to open the general outdoor air damper 410 for the calculated amount of required ventilation. ), it is possible to reduce the use of the HEPA filter.

According to an embodiment of the present invention, the sizes and inflow performances of the general outdoor air vents 400 and the minimum air vents 300 may be determined according to the amount of design outside air calculated during the design of the entire building.

According to an embodiment of the present invention, the general outdoor air vent 400 may be formed of a minimum external air vent 300 and different vents forming a dual structure. In addition, the general outdoor air vent 400 may have a size capable of introducing a general outdoor air quantity obtained by subtracting a preset minimum outdoor air quantity from a preset maximum outdoor air quantity.

According to an embodiment of the present invention, the minimum outdoor air vent 300 has a size of the general outdoor air vent 400 and the minimum outdoor air vent 300 so that the frequency of use of the HEPA filter can be minimized and smooth indoor air quality can be secured. It can be designed to have 36% of the maximum amount of outside air that can be introduced and discharged.

Looking at the above embodiment in detail, the preset maximum amount of outside air may be preset based on the internal space of the building and the number of ventilation.

Assuming that the space inside the building is 100㎡ x 30m, the required air volume is Q (supplied air volume) = A (area) x H (floor height) x ventilation frequency (6 times/h), so 3,000㎥ X 2.7m X 6 It can be calculated as times/h = 48,600 CMH. In particular, the preset maximum outside air volume may be preset as the calculated required air volume.

In addition, the preset minimum amount of outdoor air may be preset based on the internal space of the building, the number of people per unit space, and the amount of outdoor air per person.

Since the minimum amount of outdoor air is 0.2 per unit space and the amount of outdoor air per person is 29 CMH, Q1 (minimum air volume) = A (area) XH (floor height) X 0.2/㎥ X 29CMH = 3,000㎥ X 0.2/㎥ X 29CMH = 17,400CMH It is possible to calculate.

Accordingly, the size of the minimum outdoor air vent 300 may be designed so that the minimum amount of outside air that can be introduced and discharged may have 36% of the maximum amount of outside air.

In other words, the size of the minimum outdoor ventilation opening 300 compared to the conventional outdoor ventilation opening, which is the sum of the size of the general outdoor ventilation opening 400 and the minimum outdoor ventilation opening 300, is the maximum amount of outdoor air preset based on the internal space of the building and the number of ventilation. It may be set to have a pre-set ratio of the minimum amount of outdoor air based on the internal space of the middle building, the number of people per unit space, and the amount of outdoor air per person.

According to the above embodiment, when the size of the general outdoor air vent 400 and the general outdoor air damper 410 is 2.7㎥, the size of the minimum outdoor air vent 300 and the minimum outdoor air damper 310 may be 1㎥, and hepa The unit cost of the filter is about KRW 1 million for 2.7㎥ and KRW 400,000 for 1㎥. In the case of an air purifying system that is replaced twice a year and consists of 10 air conditioners, according to the conventional technology, the cost of the HEPA filter is KRW 1 million x 2 x. While 10 = 20 million won is required, according to the implementation of the present invention, since only 400,000 won x 2 x 10 = 8 million won is required by using the HEPA filter only for the minimum outdoor air vent 300, it will save 12 million won a year and maintain a 60% reduction rate. Reduction of maintenance costs can be achieved.

Compared to the case of using the HEPA filter for the entire vent, the replacement cost for using the HEPA filter can be reduced by 50% or more.

The general outdoor air vent 400 includes a general outdoor air damper 410, and may form a dual structure with the minimum outdoor air vent 300.

According to an embodiment of the present invention, the general outdoor air vent 400 does not include a HEPA filter, and by introducing outside air without filtration using a HEPA filter, it is possible to reduce the frequency and amount of use of the HEPA filter in the entire known circulation system. have.

In addition, at the same time, the size of the air circulation control system is not increased by keeping the size of the ventilation opening for introducing the maximum amount of outside air that is set in advance, which is the sum of the size of the minimum outdoor air ventilation opening 300 and the size of the general outdoor ventilation opening 400. Has no effect.

In another embodiment of the present invention, the general outdoor air vent 400 may have a size capable of introducing a preset maximum amount of outside air, and the minimum outdoor air vent 300 may have a size capable of introducing a preset minimum amount of outside air.

The double damper control unit 500 may independently control the minimum outdoor air damper 310 and the general outdoor air damper 410 to meet the minimum outdoor air quantity or required ventilation quantity based on the quality of the outside air and the quality of the inside air. .

In particular, the double damper control unit 500 uses the quality of the outside air measured by the outside air quality measurement unit 100 to set the minimum outdoor air damper 310 and the general outdoor air damper 410 so that the minimum amount of outdoor air or the required amount of ventilation is introduced. Can be controlled independently.

The double damper control unit 500 may control the minimum outdoor air damper 310 or the general outdoor air damper 410 according to whether the quality of the external air is less than or equal to a preset standard, thereby securing the minimum amount of outdoor air and maintaining the internal air quality. .

According to an embodiment of the present invention, when the air quality outside the building is below a certain level, the minimum amount of outdoor air may be calculated based on the required ventilation amount required in the building.

The double damper control unit opens the minimum outdoor air damper 310 when the quality of the external air measured by the external air quality measurement unit 100 is less than a preset standard, and opens the minimum outdoor air damper 310 so that a preset minimum amount of outdoor air is introduced. It can be opened to maintain the internal air quality.

According to an embodiment of the present invention, the double damper control unit 500 may further include a required ventilation amount calculation unit 600 that calculates a required ventilation amount using the allowable indoor dust concentration, the introduced external air dust concentration, and the indoor dust concentration. .

According to the above embodiment, when the measured external air quality is higher than a preset standard and at the same time is higher than the indoor air quality, the double damper control unit 500 generally calculates the amount of external air as much as the required ventilation amount calculated by the required ventilation amount calculation unit 600. The outdoor air damper 410 may be opened and introduced through the general outdoor air vent 400.

Specifically, the double damper control unit 500 independently controls the general outdoor air damper and the minimum outdoor air damper when the quality of the external air measured by the external air quality measurement unit 100 is greater than or equal to a preset standard to calculate the required ventilation amount 600. The required ventilation volume calculated in) can be introduced.

In particular, the required ventilation amount calculation unit 600 calculates the required ventilation amount by using the allowable indoor dust concentration, the introduced external air dust concentration, and the indoor dust concentration, and the double damper control unit 500 has the measured external air quality set in advance. If it is higher than the standard and at the same time is higher than the indoor air quality, outside air equal to the calculated required ventilation amount may be introduced through the general outdoor air vents 400 by opening the general outdoor air damper 410.

According to an embodiment of the present invention, the required ventilation amount calculation unit 600 may calculate the required ventilation amount based on the fine dust concentration as shown in Equation 1 below, and it is necessary when the quality of the outside air is less than a preset level. The ventilation amount is converted into the minimum outdoor air quantity and is filtered by the HEPA filter through the minimum outdoor air vent 300 by controlling the minimum outdoor air damper 310 to introduce external air.

Here, Qm is the required ventilation amount, Cr is the preset fine dust concentration standard, Co is the fine dust concentration of the outside air (sensing), and M: the fine dust concentration in the building (sensing).

According to an embodiment of the present invention, the dual damper control unit 500 may further include a required ventilation amount calculation unit 600 that calculates a required ventilation amount using an allowable indoor carbon dioxide concentration, an outside air carbon dioxide concentration, and an indoor carbon dioxide amount. .

According to the above embodiment, when the measured external air quality is higher than a preset standard and at the same time is higher than the indoor air quality, the double damper control unit converts the external air as much as the required ventilation amount calculated by the required ventilation amount calculation unit 600 into the general outdoor air damper ( By opening the 410, it can be introduced through the general external air vent 400.

In addition, the required ventilation amount calculation unit 600 calculates the required ventilation amount using the allowable indoor carbon dioxide concentration, the external air carbon dioxide concentration, and the indoor generated carbon dioxide amount, and the double damper control unit 500 includes the measured external air quality set in advance. If it is higher than the standard and at the same time is higher than the indoor air quality, outside air equal to the calculated required ventilation amount may be introduced through the general outdoor air vents 400 by opening the general outdoor air damper 410.

According to an embodiment of the present invention, the required ventilation amount calculation unit 600 may calculate the required ventilation amount based on the carbon dioxide concentration as shown in Equation 2 below, and when the quality of the outside air is less than a preset level, the required ventilation amount Is converted to the minimum amount of outdoor air, and is filtered by the HEPA filter through the minimum outdoor air vent 300 by controlling the minimum outdoor air damper 310 to introduce external air.

Here, Qi may be the required ventilation amount, Cr may be a preset carbon dioxide concentration standard, Co may be the carbon dioxide concentration of the outside air, and G: the amount of carbon dioxide generated in the building.

According to an embodiment of the present invention, in controlling the damper, the double damper controller 500 may control the damper by first considering the standard according to the fine dust concentration and then reflecting the standard according to the carbon dioxide concentration, but is not limited thereto. It may be reflected or the carbon dioxide standard may be reflected first.

According to an embodiment of the present invention, the minimum outdoor air damper 310 and the general outdoor air damper 410 may be composed of a mixing damper and an exhaust damper, and the mixing damper and the exhaust damper can be simultaneously adjusted and controlled to secure the minimum amount of outdoor air. I can.

According to an embodiment of the present invention, when the measured quality of the outside air is less than a preset standard, the minimum outdoor air damper 310 is controlled to secure the minimum amount of outside air, and the outdoor air is filtered through the minimum outdoor air vent 300. The outside air that has not been filtered through the HEPA filter may not flow in by filtering the flow into the air and closing the general outdoor air vents 400 by controlling the general outdoor air damper 410.

In addition, the double damper control unit 500 according to an embodiment of the present invention requires calculated by the required ventilation amount calculation unit 600 when the quality of the external air measured by the external air quality measuring unit 10 is higher than a preset standard. Depending on the amount of ventilation, the general outdoor air damper 410 is controlled to open the general outdoor air vent 400, or the general outdoor air damper 410 and the minimum outdoor air damper 310 are controlled to control the minimum outdoor air vent 300 and the general outdoor air. It is possible to control to open the vents 400 at the same time.

More specifically, when the required ventilation amount calculated by the required ventilation amount calculation unit 100 is less than or equal to the general outdoor air quantity obtained by subtracting the preset minimum outdoor air quantity from the preset maximum outdoor air quantity, the double damper control unit 500 is the general outdoor air damper 410 ) Is opened, and the required ventilation amount is introduced through the general outdoor air vent 400, and the required ventilation amount calculated by the required ventilation amount calculation unit 100 exceeds the general outdoor air quantity obtained by subtracting the preset minimum outdoor air quantity from the preset maximum outdoor air quantity. At the same time, the minimum outdoor air damper 310 and the general outdoor air damper 410 may be opened at the same time, and a required amount of ventilation may be introduced through the minimum outdoor air vent 300 and the general outdoor air vent 400.

That is, the double damper control unit 500 independently controls the minimum outdoor air damper 310 and the general outdoor air damper 410 to open the minimum outdoor air damper 310 and close the general outdoor air damper 410, or vice versa. While opening 410, the minimum outdoor air damper 310 may be closed, but the minimum outdoor air damper 310 and the general outdoor air damper 410 may be opened at the same time.

According to another embodiment of the present invention, when the general outdoor air vent 400 is set to a size capable of introducing a preset maximum amount of outdoor air, the double damper control unit 500 corresponds to the size of the required ventilation amount calculated by the required ventilation amount calculation unit 100. Regardless, only the general outdoor air damper 410 can be opened. At this time, the minimum outdoor air damper 310 may be closed.

According to an embodiment of the present invention, when the measured quality of the outside air is higher than a preset standard, the minimum outdoor air damper 310 is controlled to minimize the replacement of the HEPA filter to close the minimum outdoor air vent 300, and the general outdoor air damper. By opening 410, outside air can be introduced through the general outside air vent 400.

According to an embodiment of the present invention, the HEPA filter used in the air circulation control system has a high filterability and is formed in a structure that allows particulates to pass therethrough, so that airflow is output only when air is supplied at a higher static pressure than a general filter.

According to the above embodiment, when the air supply fan capacity required for the general filter is generally 48,600㎡/h = 1000pa, 22KW of power is required, whereas the air supply fan capacity required for the HEPA filter is generally 48,600㎡/h = 1350pa. And 30KW of power can be consumed.

This means that when only the HEPA filter is used, the static pressure must be calculated to be 350pa higher than when using only the general filter to produce the same air volume, and due to the increase in static pressure, the motor capacity increases, resulting in energy loss.

In addition, in general, the static pressure of the HEPA filter can pass through the air volume at the initial stage of about 150pa, but when the filter is at the end (until the replacement period), the desired air volume is generally produced only when the static pressure is about 350pa.

According to an embodiment of the present invention, when calculated as annual capacity compared to the case of using the HEPA filter, 8 (capacity difference) X 8 (average daily operating time) X 20 (days) X 12 (months) = 15,630 KWH There may be an effect of reducing the value.

When calculating the above savings in terms of amount (that is, calculating industrial power based on high-voltage A selection 1), the basic rate is 7,220 won and 61,6 won/KW of simple power based on light loads in June and August in summer. Calculated as 7,220 won X 8 (capacity difference) X 12 (monthly) = 693,120 won, and the charge for total usage: 15,360 X 61.6 = 946,1767 won, and the total annual charge = base charge + usage charge is 693,120 + As 946,176 = 1,639,296 won, according to an embodiment of the present invention, there may be an effect of saving 16,392,960 won per year than when using an air circulation device with a HEPA filter for all ten in a building.

FIG. 2 is a diagram illustrating that an air circulation control system having a dual damper structure capable of reducing use of a HEPA filter and saving energy according to an embodiment of the present invention is reflected in an air purification system.

Referring to FIG. 2, an air circulation control system having a dual damper structure capable of reducing the use of a HEPA filter included in the air purification system according to an embodiment of the present invention and energy saving is shown. At least one of 310, HEPA filter 320, pre-filter 330, middle filter 340, and wind speed sensor 350 may be included.

In addition, the general outdoor air vents 400 may include a general outdoor air damper 410, and the minimum external air vents 300 and the general outdoor air vents 400 may be formed in a double structure that is composed of different vents and is connected to the inside. have.

FIG. 3 is a view showing a detailed configuration of an air circulation control system having a dual damper structure capable of reducing the use of a HEPA filter and saving energy according to an exemplary embodiment of the present invention shown in FIG. 1.

Referring to FIG. 3, the external air quality measurement unit 100 may include one of an outdoor fine dust sensor and an outdoor carbon dioxide sensor, and the indoor air quality measurement unit 200 uses one of an indoor fine dust sensor and an indoor carbon dioxide sensor. Can include.

4 is a flowchart of a method for controlling air circulation of a dual damper structure capable of saving energy and reducing use of a HEPA filter according to an exemplary embodiment of the present invention.

The quality of the air outside the building is measured (S10).

According to an embodiment of the present invention, the quality of air outside a building may be measured using a fine dust sensor or a carbon dioxide sensor.

According to an embodiment of the present invention, a fine dust concentration or a carbon dioxide concentration may be measured using a fine dust sensor and a carbon dioxide sensor, and air quality may be measured by comparing these measured values with a preset air quality standard.

According to an exemplary embodiment of the present invention, a fine dust concentration of 15 μg/m 3 or more may be evaluated as poor air quality as a preset air quality standard.

In addition, according to an embodiment of the present invention, air quality may be measured based on a value reflecting not only the concentration of fine dust but also the concentration of carbon dioxide in the outside air.

According to an embodiment of the present invention, if external air quality is evaluated as poor, it is obvious that the quality of indoor air will deteriorate if external air is introduced directly into the building, so that the filtered air can be introduced through the HEPA filter. External air may be introduced through the minimum external air vent 300.

The quality of the air inside the building is measured (S20).

According to an embodiment of the present invention, the quality of air inside a building may be measured using a fine dust sensor or a carbon dioxide sensor.

According to an embodiment of the present invention, the indoor air quality measurement unit 200 may include at least one fine dust sensor or a carbon dioxide sensor installed inside a building, and is installed on each floor or at a predetermined location to measure air inside the building. Data that can measure quality can be sensed.

According to an exemplary embodiment of the present invention, a fine dust concentration of 15 μg/㎥ or more may be evaluated as poor air quality as a preset air quality standard.

In addition, according to an embodiment of the present invention, air quality may be measured based on a value reflecting not only the concentration of fine dust but also the concentration of carbon dioxide in the outside air.

According to an embodiment of the present invention, if external air quality is evaluated as poor, it is obvious that the quality of indoor air will deteriorate if external air is introduced directly into the building, so that the filtered air can be introduced through the HEPA filter. External air may be introduced through the minimum external air vent 300.

It is compared whether the quality of the outside air is less than or equal to a preset standard (S30).

According to an embodiment of the present invention, it is possible to compare whether the quality of the outside air is less than or equal to a preset standard. According to an embodiment of the present invention, evaluation of a fine dust concentration of 15 μg/㎥ or more as poor air quality is pre-set air. Can be used as a quality standard.

The minimum outdoor air damper 310 or the general outdoor air damper 410 is controlled to secure the minimum amount of outdoor air while maintaining the internal air quality (S40).

According to an embodiment of the present invention, the minimum amount of outside air may be the required ventilation amount required in the building when the air quality outside the building is below a certain level, and this may be determined according to the fine dust concentration and the carbon dioxide concentration.

According to an embodiment of the present invention, it may further include a required ventilation amount calculation unit 600 that calculates a required ventilation amount using the allowable indoor dust concentration, the introduced external air dust concentration, and the indoor dust concentration.

According to the above embodiment, when the measured external air quality is higher than a preset standard and at the same time is higher than the indoor air quality, the general outdoor air damper 410 is opened to open the general outdoor air damper 410 as much as the required ventilation amount calculated by the required ventilation amount calculation unit 600 It can be introduced through the general outside air vent 400.

According to an embodiment of the present invention, it is possible to calculate the required ventilation amount based on the fine dust concentration as shown in Equation 1, and when the quality of the outside air is less than a preset level, the required ventilation amount is converted to the minimum outdoor air quantity. By controlling the damper 310, it is filtered through the HEPA filter through the minimum outdoor air vent 300 to introduce external air.

According to an embodiment of the present invention, it may further include a required ventilation amount calculating unit 600 that calculates a required ventilation amount using the allowable indoor carbon dioxide concentration, the outside air carbon dioxide concentration, and the indoor carbon dioxide amount.

According to the above embodiment, when the measured external air quality is higher than a preset standard and at the same time is higher than the indoor air quality, the general outdoor air damper 410 opens the general outdoor air damper 410 for external air equivalent to the required ventilation amount calculated by the required ventilation amount calculation unit 600. It can be introduced through the general outside air vent 400.

In addition, according to an embodiment of the present invention, it is possible to calculate the required ventilation amount based on the carbon dioxide concentration as shown in Equation 2, and when the quality of the outside air is less than or equal to a preset level, the required ventilation amount is converted to the minimum outdoor air quantity. By controlling the damper 310, it is filtered through the HEPA filter through the minimum outdoor air vent 300 to introduce external air.

According to an embodiment of the present invention, in controlling a damper, a standard based on the concentration of fine dust may be first considered and then the standard based on the concentration of carbon dioxide may be reflected, but is not limited thereto, and reflected at the same time or the carbon dioxide standard is first reflected You may.

According to an embodiment of the present invention, the minimum outdoor air damper 310 and the general outdoor air damper 410 may be composed of a mixing damper and an exhaust damper, and the mixing damper and the exhaust damper can be simultaneously adjusted and controlled to secure the minimum amount of outdoor air. I can.

According to an embodiment of the present invention, when the measured quality of the outside air is less than a preset standard, the minimum outside air damper 310 is controlled to secure the minimum outside air volume, and the outside air through the minimum outside air vents 300 is HEPA filter. The outside air that has not been filtered by the HEPA filter may not flow in by filtering the flow into the air and closing the general outdoor air vent 400 by controlling the general outdoor air damper 410.

According to an embodiment of the present invention, when the measured quality of the outside air is higher than a preset standard, the minimum outdoor air damper 310 is controlled to minimize the replacement of the HEPA filter to close the minimum outdoor air vent 300, and the general outdoor air damper. By opening 410, outside air can be introduced through the general outside air vent 400.

The embodiments of the present invention are not implemented only through the apparatus and/or method described above, and the embodiments of the present invention have been described in detail above, but the scope of the present invention is not limited thereto, and the following claims Various modifications and improvements of those skilled in the art using the basic concept of the present invention defined in the present invention also belong to the scope of the present invention.

Claims (10)

A minimum outdoor air ventilator having a size capable of inflowing a predetermined minimum outdoor air quantity and including a minimum outdoor air damper and a HEPA filter;
It is composed of a minimum outdoor air ventilation opening and a different ventilation opening to form a dual structure with the minimum external air ventilation opening, and has a size capable of inflowing the general outdoor air quantity obtained by subtracting the predetermined minimum outdoor air quantity from the preset maximum outdoor air quantity, and includes a general outdoor air damper. General outdoor air vents;
An external air quality measuring unit that measures the quality of air outside the building using a fine dust sensor and a carbon dioxide sensor;
An indoor air quality measuring unit that measures the quality of air inside the building using a fine dust sensor and a carbon dioxide sensor;
A required ventilation amount calculation unit that calculates a required ventilation amount in a range less than or equal to a preset maximum outdoor air amount by using the quality of the outside air measured by the outside air quality measurement unit and the quality of the building interior air measured by the indoor air quality measurement unit; And
Use of a HEPA filter comprising: a dual damper control unit that independently controls the minimum outdoor air damper and the general outdoor air damper so that the minimum amount of outdoor air or the required amount of ventilation is introduced by using the quality of the external air measured by the external air quality measuring unit. Air circulation control system with double damper structure that can save energy and save energy. The method according to claim 1,
The dual damper control unit maintains the internal air quality by opening the minimum outdoor air damper so that the predetermined minimum external air amount is introduced by opening the minimum outdoor air damper when the external air quality measured by the external air quality measuring unit is less than a preset standard. Air circulation control system with dual damper structure that can reduce the use of HEPA filter and save energy. The method according to claim 1,
The double damper control unit is characterized in that when the quality of the external air measured by the external air quality measuring unit is higher than a preset standard, the general outdoor air damper and the minimum outdoor air damper are independently controlled to introduce the required ventilation amount calculated by the required ventilation amount calculation unit. Air circulation control system with double damper structure that can reduce the use of HEPA filter and save energy. The method of claim 3,
The required ventilation amount calculation unit calculates the required ventilation amount using the allowable indoor dust concentration, the introduced external air dust concentration, and the indoor dust concentration,
The double damper control unit is characterized in that when the measured external air quality is higher than a preset standard and at the same time is higher than the indoor air quality, the external air equivalent to the calculated required ventilation amount is opened through the general outdoor air vents by opening the general outdoor air damper. Air circulation control system with double damper structure that can reduce the use of HEPA filter and save energy. The method of claim 3,
The required ventilation amount calculation unit calculates the required ventilation amount using the allowable indoor carbon dioxide concentration, the outside air carbon dioxide concentration, and the indoor carbon dioxide amount,
The double damper control unit is characterized in that when the measured external air quality is higher than a preset standard and at the same time is higher than the indoor air quality, the external air equal to the calculated required ventilation amount is opened by opening the general outdoor air damper and introduced through the general outdoor air vent. Air circulation control system with double damper structure that can reduce the use of HEPA filter and save energy. The method according to claim 1,
The double damper control unit controls the minimum outdoor air damper so that the minimum amount of outside air flows in when the quality of the outside air measured by the outside air quality measurement unit is less than a preset standard, and filters the outside air into the HEPA filter through the minimum outside air vent. Air circulation control system with dual damper structure that can reduce the use of HEPA filter and save energy, characterized in that the outside air not filtered by the HEPA filter does not flow in by controlling the outside air damper to close the general outside air vent. The method according to claim 1,
The double damper control unit controls the general outdoor air damper according to the size of the required ventilation amount calculated by the required ventilation amount calculation unit when the quality of the external air measured by the external air quality measurement unit is higher than a preset standard, and opens the general outdoor air vent, or A dual damper structure air circulation control system capable of saving energy and reducing the use of HEPA filters, characterized in that by controlling the general outdoor air damper and the minimum outdoor air damper to open the minimum outdoor air vent and the general outdoor air vent at the same time. The method of claim 7,
When the required ventilation amount calculated by the required ventilation amount calculation unit is less than the general outdoor air quantity obtained by subtracting the preset minimum outdoor air quantity from the preset maximum outside air quantity, the general outdoor air damper is opened and the required ventilation quantity is introduced through the general outdoor air vent. , If the required ventilation calculated by the required ventilation amount calculation unit exceeds the general outside air quantity by subtracting the preset minimum outside air quantity from the preset maximum outside air quantity, open the minimum outdoor air damper and the general outdoor air damper at the same time to open the minimum outdoor air vent and the general outdoor air vent. Air circulation control system of dual damper structure capable of reducing the use of HEPA filter and saving energy, characterized in that the required ventilation amount is introduced through it. The method according to claim 1,
The air circulation control system of a double damper structure capable of saving energy and reducing the use of HEPA filters, characterized in that the preset minimum outdoor air amount is preset based on the internal space of the building, the number of people per unit space, and the amount of outdoor air per person. The method of claim 9,
The air circulation control system of a double damper structure capable of reducing the use of HEPA filters and saving energy, characterized in that the preset maximum amount of outside air is preset based on the internal space of the building and the number of ventilation.

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