WO2024019231A1

WO2024019231A1 - Air recirculation and ventilation system for pig house

Info

Publication number: WO2024019231A1
Application number: PCT/KR2022/016259
Authority: WO
Inventors: 이인복; 이상연; 박세준; 김준규; 최영배; 조정화; 정효혁; 강솔뫼
Original assignee: 서울대학교 산학협력단
Priority date: 2022-07-19
Filing date: 2022-10-24
Publication date: 2024-01-25
Also published as: KR20240011934A

Abstract

The present invention relates to an air recirculation and ventilation system for a pig house, which purifies the air inside a pig house and then re-supplies treated air to the pig house. The pig house is equipped with a discharge fan (11) for discharging inside air, an inflow fan (13) for introducing treated air into the pig house, and an air quality sensor (15) for sensing the temperature, humidity, carbon dioxide concentration, and ammonia concentration of the inside air, and is characterized by comprising: an air purifier (100) for removing contaminants in the inside air (A1) that is discharged to the outside through the discharge fan (11); an outdoor air mixer (200) for discharging a portion of the purified air (A2) discharged from the air purifier (100) to the outside and mixing in outdoor air to the purified air (A2) so as to adjust the carbon dioxide concentration thereof; and a UV sterilizer (400) disposed between the outdoor air mixer (200) and the pig house (10) to sterilize swine disease-causing microbes contained in the outdoor-air-mixed air (A3), which is discharged from the outdoor air mixer (200), to supply sterilized treated air (A5) to the pig house (10).

Description

Pig farm air recirculation ventilation system

The present invention relates to an air recirculation ventilation system for a pig house, and more specifically, to an air recirculation ventilation system that can properly control the air environment of a pig house through recirculation of the air inside the pig house.

The domestic pig farming industry is an important industry with the largest livestock industry production amounting to 7.4 trillion won annually. Recently, as mass production is required, pigs are raised densely and facilities are being enlarged. However, this causes problems such as livestock odor, spread of livestock infectious diseases, poor breeding environment, and increased energy load.

Pig farms during winter and season changes manage ventilation by minimizing ventilation to save on additional heating costs. This increases the concentration of ammonia, hydrogen sulfide, and complex odors inside the facility, creating a poor breeding environment, leading to the death of pigs and poor breeding performance. .

In the summer, maximum ventilation is mainly performed due to the high temperature environment, but it is difficult to manage the overall internal temperature in large-scale pig farming facilities, resulting in uneven temperature distribution.

The purpose of the present invention is to solve the above-mentioned problems and to provide a pig house air recirculation ventilation system that purifies and reuses the air inside the pig house to control the air quality and temperature inside the pig house.

Another object of the present invention is to provide a pig house air recirculation ventilation system that can block the external spread of diseases inside the livestock house by purifying the internal air and releasing it to the outside.

Another object of the present invention is to provide a pig house air recirculation ventilation system that can minimize the cost of heating the pig house by controlling the temperature of the internal air using solar heat.

The above objects and various advantages of the present invention will become more apparent to those skilled in the art from preferred embodiments of the present invention.

The object of the present invention can be achieved by a pig house air recirculation ventilation system that purifies the internal air of the pig house and then resupplies the treated air to the pig house. In the pig house air recirculation ventilation system of the present invention, the pig house includes an exhaust fan 11 for discharging internal air, an inflow fan 13 for introducing treated air into the pig house, and the temperature and humidity, carbon dioxide concentration, and ammonia of the internal air. An air purifier (100) equipped with an air quality sensor (15) that detects concentration and removing contaminants from the internal air (A1) discharged to the outside through the exhaust fan (11); an external air mixer (200) that discharges a portion of the purified air (A2) discharged from the air purifier (100) to the outside and mixes the external air with the purified air (A2) to adjust the carbon dioxide concentration; It is provided between the external air mixer (200) and the pig pen (10) to sterilize swine disease bacteria contained in the outdoor mixed air (A3) discharged from the external air mixer (200), and the sterilized treated air (A5) is used to sterilize the pig pen. It is characterized by including a UV sterilizer (400) supplied to (10).

According to one embodiment, a solar heat collection unit 500 provided on the upper part of the pig pen 10 to collect solar heat; It may further include a heat exchanger 300 provided between the outside air mixer 200 and the UV sterilizer 400 to exchange heat between the solar energy collected in the solar heat collection unit 500 and the outside air mixed air (A3). You can.

According to one embodiment, the amount of ventilation through the exhaust fan 11, the amount of outside air mixed in the outside air mixer 200, and the operation of the heat exchanger 300 are controlled according to the detection result of the air quality sensor 15. It further includes a control unit 600 that, if the temperature of the internal air detected by the air quality detection sensor 15 is higher than the preset maximum temperature and is higher than the temperature of the external air, the exhaust fan 11 increases the rotation speed of the external air mixer 200 and increases the mixing amount of external air of the external air mixer 200, and if the temperature of the internal air detected by the air quality detection sensor 15 is lower than the preset minimum temperature and lower than the temperature of the external air, The rotation speed of the exhaust fan 11 is increased, the mixing amount of external air in the external air mixer 200 is increased, the heat exchanger 300 is operated, and the temperature of the internal air detected by the air quality sensor 15 is increased. When the optimal temperature is between the preset minimum temperature and maximum temperature, the rotation speed of the exhaust fan 11 can be increased and the mixing amount of external air in the external air mixer 200 can be reduced.

The pig house air recirculation ventilation system of the present invention purifies the inside air of the pig house using an air purifier and then reuses it to circulate the inside air in a way that blocks or minimizes the inflow of external air from the outside without windows.

The air released during this process is purified and then discharged, so even if a disease occurs inside the pig house, it does not cause damage to other surrounding pig houses. In addition, since the outdoor mixed air, which is a mixture of external air and internal air, is sterilized through a UV sterilizer, the possibility of pigs being infected with swine diseases can be prevented even if the outdoor mixed air is re-supplied to the pig pen.

Additionally, because the air inside the pig pen is reused, the cost of maintaining the temperature of the internal environment, especially in summer or winter, can be reduced.

In addition, since the temperature of the circulating air is controlled using sunlight, there is an advantage in minimizing the maintenance costs used for ventilation of pig house air.

1 is a schematic diagram schematically showing the overall configuration of the pig pen air recirculation ventilation system according to the present invention;

Figure 2 is a block diagram schematically showing the internal configuration of the pig pen air recirculation ventilation system according to the present invention;

Figure 3 is a cross-sectional schematic diagram schematically showing the cross-sectional configuration of the air purifier of the pig pen air recirculation ventilation system according to the present invention;

Figure 4 is an enlarged illustration schematically showing the air purification process of the air purifier;

Figure 5 is an example diagram showing the operation process of the heat exchanger using sunlight of the pig pen air recirculation ventilation system according to the present invention;

Figure 6 is a graph of sterilization sensitivity constant and sterilization efficiency through a UV sterilizer;

Figure 7 is a flow chart showing the control flow of the control unit of the pig pen air recirculation ventilation system according to the present invention;

Figure 8 is a cross-sectional schematic diagram showing a modified example of the air purifier of the pig pen air recirculation ventilation system according to the present invention.

In order to fully understand the present invention, preferred embodiments of the present invention will be described with reference to the accompanying drawings. Embodiments of the present invention may be modified in various forms, and the scope of the present invention should not be construed as being limited to the embodiments described in detail below. This example is provided to more completely explain the present invention to those with average knowledge in the art. Therefore, the shapes of elements in the drawings may be exaggerated to emphasize a clearer description. It should be noted that identical members in each drawing may be indicated by the same reference numerals. Detailed descriptions of well-known functions and configurations that are judged to unnecessarily obscure the gist of the present invention are omitted.

Figure 1 is a schematic diagram showing the schematic configuration of the pig pen air recirculation ventilation system (1) according to the present invention, and Figure 2 is a block diagram schematically showing the internal configuration and control flow of the pig pen air recirculation ventilation system (1). .

As shown, the pig house air recirculation ventilation system (1) according to the present invention is coupled to the pig house (10) where pigs (P) are raised, purifies the internal air (A1) discharged from the pig house (10), and then cleans the pig house (10). ) to control the quality and temperature of the internal air of the pig pen (10) by recirculating it.

The pig pen air recirculation ventilation system (1) of the present invention minimizes the inflow of external air (A), purifies the internal air (A1), mixes some of the external air (A), and re-supplies it to the pig pen (10). Accordingly, the mixing ratio of the warm and polluted internal air (A1) and the cold but fresh external air (A) is adjusted to circulate the appropriately mixed treated air and re-supply it to the pig house (10) to prevent the inflow and outflow of disease and odor. (10) It has the advantage of minimizing the energy load consumed to heat the internal air.

In addition, the energy consumed to additionally heat the internal air uses solar energy, which has the advantage of minimizing management costs consumed for heating.

As shown in FIGS. 1 and 2, the pig pen air recirculation ventilation system (1) of the present invention includes an air purifier (100) that purifies the internal air (A1) discharged from the pig pen (10) to remove odor components, and an air purifier (100) that removes odor components. An external air mixer (200) that mixes the purified air (A2) discharged from the purifier (100) with external air (A) to adjust the carbon dioxide concentration of the purified air (A2), and the external air discharged from the external air mixer (200) A heat exchanger (300) that controls the temperature of the mixed air (A3) using solar energy, and a UV sterilizer ( 400) and a control unit 600 that controls the air quality and temperature of the air inside the pig pen 10.

The pig pen 10 includes an exhaust fan 11 that discharges the internal air (A1) into the air purifier 100, and an inlet fan 13 that introduces the treated air (A5) that has been processed in the UV sterilizer 400 into the interior. They are located in different directions. In addition, the pig pen 10 is equipped with an air quality sensor 15 that detects internal temperature, humidity, carbon dioxide concentration, and ammonia concentration. The air quality, temperature, and humidity detected by the air quality sensor 15 are transmitted to the control unit 600. The temperature inside the pig pen 10 is affected by the calorific value of the pigs being raised.

The air purifier 100 of the present invention uses a wet cleaning method to remove odor components contained in the internal air (A1) by contacting them with liquid circulating water (W).

Figure 3 is a cross-sectional schematic diagram schematically showing the cross-sectional configuration of the air purifier 100. As shown, the air purifier 100 has a casing 110 having an inlet 111 through which internal air (A1) flows in and an outlet 115 through which air purification completed air purification (A2) is discharged at both ends. And, a plurality of circulating water injection pipes 120 arranged vertically at regular intervals along the direction of movement of the internal air (A1) inside the casing 110 and the adjacent circulating water injection pipes 120 are disposed between circulating water ( A filler layer 130 in which W) is absorbed, an eliminator 140 provided between the circulating water injection pipe 120 and the outlet 115 to remove the circulating water (W) floating therein, and a casing 110. ) and a circulating water tank 150 in which waste circulating water (W1) is collected, a circulating water supply pipe 160 connecting the circulating water tank 150 and the circulating water injection pipe 120, and a circulating water supply pipe ( It includes a circulating water pump 170 that supplies circulating water (W) to 160).

The casing 110 is formed in the form of a closed enclosure with both ends open. The inlet 111 is connected to the exhaust fan 11 of the pig pen 10 and the internal air discharge pipe 112, and the outlet 115 is connected to the external air mixer 200 and the purified air inlet pipe 210.

The inlet 111 is provided with an internal air inlet fan 113 that applies pressure so that internal air (A1) flows in, and the outlet 115 is provided with pressure so that purified air (A2) moves to the purified air inlet pipe 210. A purified air blowing fan 117 that applies is provided.

Inside the casing 110, a plurality of circulating water injection pipes 120 are arranged at regular intervals perpendicular to the direction of movement of the internal air A1. The circulating water injection pipe 120 is provided with a length that can reach from the outside of the casing 110 to the bottom of the casing 110. A plurality of circulating water injection pipes 120 are connected to the circulating water supply pipe 160 to receive circulating water (W).

A plurality of spray nozzles 121 are provided at regular intervals on the plate surface of the circulating water injection pipe 120. The injection nozzles 121 spray circulating water W horizontally toward the moving direction of the internal air A1. At this time, the injected circulating water (W) is sprayed into the internal air (A1) and is simultaneously absorbed into the filler layer 130 disposed in the front.

The circulating water (W) comes into contact with the internal air (A1) and dissolves the water-soluble odor components contained in the internal air (A1). Hydrogen sulfide and ammonia, which cause most bad odors, are mostly dissolved and removed when they come into contact with circulating water (W). The waste circulating water (W1) in which the odor component is dissolved falls to the bottom of the casing (110) and is then collected in the circulating water tank (150).

Figure 4 is an example diagram showing a process of cleaning the internal air (A1) after the circulating water (W) sprayed from the spray nozzle 121 is absorbed into the filler layer 130.

In the air purifier 100 of the present invention, filler layers 130 are alternately arranged between a plurality of circulating water injection pipes 120 arranged adjacently. The filler layer 130 absorbs the circulating water (W) sprayed from the spray nozzle 121 and increases the contact time and contact area between the internal air (A1) and the circulating water (W), thereby improving cleaning efficiency.

The circulating water (W) absorbed in the filler layer 130 flows down the filler layer 130 and comes into contact with the internal air (A1) moving horizontally, and cleans the odor components of the internal air (A1). Here, it is desirable that the spray nozzle 121 is capable of uniformly spraying the circulating water (W) into a wide space.

The filler layer 130 absorbs the circulating water (W) sprayed from the spray nozzle 121, and the internal air (A1) moving through the inside comes into contact with the absorbed circulating water (W) and removes odor components. . The filler layer 130 is disposed between the circulating water injection pipes 120.

The filler layer 130 allows gas, which is internal air, and liquid, which is circulating water, to come into contact and remove contaminants.

Pollutants contained in the internal air generated from pig farms include a large amount of ammonia. In the case of ammonia, the material transfer coefficient is high because the Henry constant is high, and even if only water is used as the circulating water (W), the cleaning efficiency can be high in the filler layer 130.

The filler used in the filler layer 130 requires continuous management and replacement.

The eliminator 140 is provided at the rear of the casing 110, that is, between the filler layer 130 and the purified air blowing fan 117. The eliminator 140 is a device that separates gas and liquid and removes the circulating water (W) moving along the direction of movement of the internal air (A1) inside the casing (110).

When the purified air (A2) from which contaminants have been removed is moved inside the casing (110), the humidity of the purified air (A2) is improved when the circulating water (W) is moved along with it. If the humidity of the purified air (A2) is improved, when the treated air (A5) is re-introduced into the pig pen (10), the humidity inside the pig pen (10) may increase and an unfavorable environment for pig breeding may be created.

To prevent this, the eliminator 140 removes circulating water (W) droplets floating inside the casing 110.

The circulating water tank 150 is provided at the lower part of the casing 110 and communicates with the bottom of the casing 110. The circulating water tank 150 stores a certain amount of circulating water (W), and inside the casing 110, waste circulating water (W1) in which contaminants are dissolved in contact with the internal air (A1) is collected.

The circulating water tank 150 is connected to the circulating water injection pipe 120 through the circulating water supply pipe 160 and supplies circulating water (W) to the circulating water injection pipe 120. The circulating water supply pipe 160 is equipped with a circulating water pump 170 to move circulating water (W) along the circulating water supply pipe 160.

At this time, the circulating water pump 170 is equipped with a chemical solution supply tank 171 that supplies a chemical solution for disinfecting the waste circulating water (W1). The chemical solution supply tank 171 supplies a certain amount of chemical solution to the circulating water supply pipe 160 to neutralize the waste circulating water (W1) supplied to the circulating water supply pipe 160.

Here, the circulating water (W) removes water-soluble odor components, especially ammonia. Ammonia is better removed the lower the pH, and complex odors are easily removed by chlorine substances such as HOCL. Accordingly, the circulating water (W) may be one or more of slightly acidic electrolyzed water and sodium bisulfate.

At this time, sodium bisulfate is used by mixing with water and adjusting the pH to 1-2.

The external air mixer 200 adjusts the carbon dioxide concentration by mixing external air (A) with the purified air (A2) from which odor components have been removed from the air purifier (100).

The pig pen air recirculation ventilation system (1) of the present invention is characterized in that it recirculates all the internal air inside the pig pen without exhausting it. When removing contaminants from the internal air (A1) in contact with the circulating water (W) in the air purifier 100 described above, odorous components such as ammonia with a high Henry constant can be easily removed, but with a low Henry constant. There are limits to the removal of carbon dioxide through physical absorption mechanisms alone.

Accordingly, the pig house air recirculation ventilation system (1) of the present invention discharges a part of the purified air (A2) that has passed through the air purifier (100) to the outside and mixes it with fresh outside air (A) to control the carbon dioxide concentration.

The external air mixer 200 is connected to the air purifier 100 and includes a purified air inlet pipe 210 through which purified air (A2) flows in, and an exhaust fan that discharges a portion of the purified air (A2) introduced inside to the outside. It includes (220) and a mixed air discharge pipe (230) that moves the outside air mixture (A3), which is a mixture of outside air (A) and purified air (A2), to the heat exchanger (300).

The driving speed of the exhaust fan 220 is controlled by the control unit 600. The longer the driving speed and driving time of the exhaust fan 220, the greater the amount of purified air (A2) is discharged.

In order to maintain a positive pressure, the external air mixer 200 introduces the same amount of external air (A) as the purified air (A2) is discharged.

The control unit 600 adjusts the amount of external air (A) mixed based on the carbon dioxide concentration detected by the air quality detection sensor 15 inside the pig pen 10. As the carbon dioxide concentration increases, the driving speed of the exhaust fan 220 is increased to increase the amount of external air (A) mixed.

The heat exchanger 300 controls the temperature of the outside air mixture A3 moved from the outside air mixer 200. The heat exchanger 300 is selectively operated under the control of the control unit 600 and exchanges heat with the outside air mixture A3 using the heat energy generated by the solar heat collection unit 500.

As shown in FIG. 1, the solar heat collection unit 500 includes a solar heat collection plate 510 installed on the roof of the pig pen 10, and a heat storage tank 520 in which solar energy collected by the solar heat collection plate 510 is stored in the heat medium M. ) includes.

Figure 5 is a schematic diagram showing the operation process of the solar heat collection unit 500 and the heat exchanger 300. As shown, the solar collector 510 collects the sun's radiant energy and transfers it to the heat medium (M), which is a fluid. The solar collector 510 is formed of a dual structure of a transparent glass cover and an absorption plate. The glass cover transmits direct sunlight or sunlight (L) reflected from other objects, but does not transmit infrared rays with long wavelengths reflected from the absorber, so a greenhouse effect occurs in the space between the transparent cover and the absorber, creating energy accumulates.

The accumulated energy is transferred to the heat collection coil 511, and the heat collection coil 511 transfers heat to the heat medium (M) contained within the heat storage tank 520. The heat medium (M) may be various fluids, including water.

When solar power is not sufficient, such as during the rainy season or winter, the heat storage tank 520 may be provided with an auxiliary heater 521 to heat the heat medium M. The heat medium (M) warmed by the heat collection coil 511 in the heat storage tank 520 circulates through the heat medium circulation pipe 530 to the heat storage tank 520 via the heat exchanger 300.

The heat exchanger 300 causes the outside air mixed air (A3) introduced into the inside through the mixed air discharge pipe 230 to come into contact with the heat medium circulation pipe 530, thereby increasing the temperature of the outside air mixed air (A3). The temperature-controlled air (A4) whose temperature has been raised in the heat exchanger 300 is moved through the temperature-controlled air discharge pipe 310 and supplied to the UV sterilizer 400.

The UV sterilizer 400 sterilizes the temperature-controlled air (A4) passing through the heat exchanger 300 using ultraviolet rays. External air (A) is mixed with purified air (A2) through the external air mixer (200). During this process, the mixed outside air (A) may contain disease germs that can cause disease in pigs, such as porcine respiratory coronavirus and porcine parvovirus.

The UV sterilizer 400 sterilizes the temperature-controlled air (A4) and sterilizes porcine disease bacteria contained in the temperature-controlled air (A4).

Figure 6 shows the sterilization sensitivity constant (k) and sterilization efficiency when the output of the UV lamp inside the UV sterilizer 400 is 8.5W relative to the speed of the temperature-controlled air (A4) moving along the UV sterilizer 400. It's a graph.

As shown, in the case where the lamp output is 8.5W, it can be confirmed that sterilization of more than 90% of the disease is possible when the sterilization sensitivity constant k is 0.08 based on the fastest wind speed of 6.84m/s. Therefore, using an 8.5W UV lamp, it is possible to sterilize all porcine disease viruses such as porcine respiratory coronavirus, porcine parvovirus, swine flu virus, and reproductive and respiratory syndrome.

As shown in FIG. 2, the control unit 600 controls the speed V1 of the exhaust fan 11 of the pig pen 10 and the inlet fan 13 according to the sensor result of the air quality detection sensor 15 of the pig pen 10. Even if the air inside the pig pen (10) is circulated by controlling the speed (V2), the speed (V3) of the exhaust fan (220) of the external air mixer (200), and the operation of the heat exchanger (300), the internal temperature of the pig pen (10) Adjust the air quality to maintain it within the preset appropriate range.

The control unit 600 detects the temperature, humidity, carbon dioxide concentration, and ammonia concentration inside the pig pen through the air quality detection sensor 15. Additionally, the control unit 600 also senses the temperature of external air (A). Meanwhile, the control unit 600 communicates with the management server or the manager's mobile terminal 700 as shown in FIG. 1 through wireless communication.

The manager sets the desired appropriate temperature, appropriate humidity, appropriate carbon dioxide concentration, appropriate ammonia concentration, maximum temperature, and minimum temperature of the pig pen 10 through the management server or mobile terminal 700.

Figure 7 is a flowchart schematically showing the control process of the control unit 600. For convenience of explanation, the maximum temperature is 31℃, the minimum temperature is 28℃, the optimal humidity is 70%, the appropriate carbon dioxide concentration is 2500ppm, and the appropriate ammonia concentration is 20ppm.

When the temperature of the inside air (A1) is higher than the set maximum temperature of 31°C and the temperature of the outside air (A) is 25°C and the outside temperature of the pig pen (10) is lower than the inside temperature (S120), the control unit 600 controls the ventilation amount and outside air. Lower the internal temperature by increasing the mixing ratio (S130).

To this end, the speed V1 of the exhaust fan 11 is increased and the speed V3 of the exhaust fan 220 is increased to increase the mixing amount of external air A. At this time, the heat exchanger 300 is turned off to prevent the temperature of the outdoor mixed air (A3) from further increasing.

The control unit 600 maintains the same speed of the exhaust fan 11 and the exhaust fan 220 until the temperature of the internal air A1 reaches an appropriate temperature.

On the other hand, if the temperature of the internal air (A1) is higher than the set maximum temperature, but the temperature of the external air (A) is higher than the internal temperature of the pig pen (10), the control unit 600 sets the speed (V1) of the discharge fan (11) and The temperature is controlled by increasing the speed (V2) of the inlet fan (13) and minimizing the speed (V3) of the exhaust fan (220) to reduce the mixing amount of outside air.

Meanwhile, as a result of checking the temperature inside the pig pen, if the internal temperature is lower than the minimum temperature and the temperature of the external air (A) is higher than the temperature inside the pig pen (S121), the control unit 600 sets the speed (V1) of the exhaust fan 11. The amount of ventilation is increased by increasing, and the mixing amount of external air (A) is increased by increasing the speed (V3) of the exhaust fan (220). Then, the heat exchanger 300 is driven weakly to exchange heat with the outside air mixture (A3) and increase its temperature (S131).

On the other hand, when the temperature inside the pig pen is lower than the minimum temperature and higher than the temperature of the external air (A), the control unit 600 increases the speed (V1) of the discharge fan (11) and the speed (V2) of the inlet fan (13). increases the ventilation amount and reduces the speed (V3) of the exhaust fan 220 to minimize the mixing amount of external air (A). Then, the heat exchanger 300 is operated strongly to exchange heat with the outdoor air mixture A3 and rapidly increase its temperature. In this process, if the heat energy of the solar heat collection unit 500 is insufficient, the auxiliary heater 521 can be operated.

Meanwhile, when the temperature inside the pig pen is the optimal temperature (S123), the control unit 600 increases the ventilation amount by increasing the rotation speed (V1) of the exhaust fan (11) and reduces the speed (V3) of the exhaust fan (220). Reduce the mixing amount of outside air (S133).

The operation of the control unit 600 described above enumerates the control flow based only on the temperature of the internal air, but in addition, the control unit 600 controls the ventilation amount, the outside air mixing amount, and whether the heat exchanger is operated depending on the humidity, carbon dioxide concentration, and ammonia concentration. You can control it.

When the concentration of ammonia is higher than the set concentration, the control unit 600 increases the driving speed (V1) of the exhaust fan 11 and improves the driving pressure of the circulating water pump 170 of the air purifier 100 to purify the internal air. By increasing the contact between (A1) and circulating water (W), the ammonia concentration is reduced.

Additionally, when the carbon dioxide concentration of the internal air (A1) is higher than the set concentration, the control unit 600 increases the mixing amount of the external air (A) by increasing the speed of the exhaust fan 220 of the external air mixer 200.

The operation process of the pig pen air recirculation ventilation system (1) according to the present invention having this configuration will be described with reference to FIGS. 1 to 4.

When the exhaust fan 11 and the inlet fan 13 of the pig pen 10 are driven, the internal air (A1) of the pig pen 10 flows into the inlet 111 of the air purifier 100 through the internal air discharge pipe 112. do. As shown in FIG. 3, the internal air (A1) is moved into the casing 110 by the operation of the internal air inlet fan 113.

At this time, the waste circulating water (W1) in the circulating water tank 150 is moved to the circulating water supply pipe 160 by the circulating water pump 170, and is mixed with the chemical solution and neutralized. The neutralized circulating water (W) is distributed to a plurality of circulating water injection pipes (120) along the circulating water supply pipe (160).

The circulating water (W) distributed to the circulating water injection pipe 120 is injected through the injection nozzle 121.

As shown in Figure 4, the circulating water (W) sprayed from the injection nozzle 121 is absorbed into the filler layer 130, the internal air (A1) moves through the filler layer 130, and the circulating water (W) comes into contact with

In this process, contaminants including ammonia contained in the internal air (A1) are dissolved and removed.

The waste circulating water (W1) in which contaminants are dissolved falls to the bottom of the casing (110) and is then collected in the circulating water tank (150). Then, after being mixed with the chemical solution through the circulating water pump 170, it is circulated in a circulation path that moves to the circulating water injection pipe 120 through the circulating water supply pipe 160 and cleans the internal air (A1).

Meanwhile, the purified air (A2) that is moved in contact with the plurality of filler layers 130 by the blowing pressure of the purified air blowing fan 117 flows into the external air mixer 200 through the purified air inlet pipe 210. .

The exhaust fan 220 is operated under the control of the control unit 600, and part of the purified air A2 is discharged into the atmosphere. And, in order to maintain a positive pressure, an amount of external air (A) equal to the discharge amount of the purified air (A2) is introduced into the external air mixer (200) and mixed with the purified air (A2).

The outside air (A) and the purified air (A2) are mixed, and the outside air mixture (A3) with a reduced carbon dioxide concentration is introduced into the heat exchanger (300). The heat exchanger 300 is selectively operated under the control of the control unit 600.

The temperature-controlled air (A4) passing through the heat exchanger (300) is moved to the UV sterilizer (500). Swine disease bacteria in the temperature-controlled air (A4) are sterilized through the UV sterilizer (500). The treated air (A5) that has been sterilized through the UV sterilizer (500) is introduced into the pig pen (10) through the treated air inlet pipe (510). In this way, recirculation of the air (A1) inside the pig house (10) is achieved.

Meanwhile, Figure 8 is a cross-sectional view showing a modified example of the air purifier 100' used in the air recirculation ventilation system 1 of the present invention.

As shown in FIG. 3, the air purifier 100 according to a preferred embodiment of the present invention has internal air (A1) introduced into the inlet 111 and then discharged through the outlet 117. Air purification takes place as it moves along the route.

On the other hand, the air purifier 100' according to the modified example is formed by combining a plurality of

air purifying modules

100a, 100b, and 100c corresponding to the air purifier 100 of the preferred embodiment. As a result, the air purification process overlaps two times, which has the advantage of further increasing air purification efficiency.

The air purifier 100' according to another embodiment is disposed between a pair of side

air purification modules

100a and 100b arranged horizontally on both sides and a pair of side

air purification modules

100a and 100b to purify air. It includes a central air purification discharge module (100c) that discharges to the outside.

At this time, the internal air (A1) flows in through the inlet 111 of the side

air purification modules

100a and 100b on both sides, goes through the first air purification process, and then flows into the central air purification discharge module 100c in the middle. Afterwards, it goes through a secondary air purification process and is discharged to the outside.

A pair of side air purification modules (100a, 100b) are arranged in a corresponding manner on both sides. A pair of side air purification modules (100a, 100b) have casings (110a, 110b), respectively, and an inlet (111) through which internal air (A1) flows is formed on the outside, adjacent to the central air purification discharge module (100c). An outlet 115 is formed.

In each casing (110a, 110b), circulating water injection pipes (120a, 120b), filler layers (130a, 130b), and eliminators (140a, 140b) are sequentially horizontal in the direction from the inlet 111 to the outlet 115. provided in the direction.

The central air purification discharge module (100c) has a casing (110c) arranged in a vertical direction, and is in contact with the outlet (115a) of the side air purification modules (100a, 100b) on both sides of the lower part, so that the first purified air flows in. (111a) is located. And, an outlet 115a is formed at the top of the casing 110c. That is, the inlet 111a and the outlet 115a are positioned perpendicular to each other.

Inside the casing 110c, a filler layer 130c, a circulating water injection pipe 120c, and an eliminator 140c are disposed from the bottom to the top along the air movement path.

Here, an internal air inlet fan 113 is disposed in the inlet 111 area of the pair of side

air purification modules

100a and 100b, and a purified air blowing fan is installed at the outlet 115a of the central air purification discharge module 100c. (117) is provided.

Circulating water tanks (150a, 150b, 150c) are disposed at the lower parts of the side air purification modules (100a, 100b) and the central air purification discharge module (100c), respectively, and they are connected to circulating water supply pipes (160, 160a) and circulating water pumps (170, 170). By a), the circulating water (W) is circulated through the circulating water injection pipes (120a, 120b, and 120c).

The air purification operation process of each side air purification module (100a, 100b) and the central air purification discharge module (100c) is the same as that of the air purifier 100 of the preferred embodiment described above.

The air purifier 100' of this modified example has the advantage of higher purification efficiency because the three

air purification modules

100a, 100b, and 100c overlap each other to circulate circulating water and purify the internal air twice. In addition, air purification efficiency can be further increased by spraying different circulating water (W) during the primary air purification process and the secondary air purification process.

As discussed above, the pig house air recirculation ventilation system of the present invention purifies the inside air of the pig house using an air purifier and then reuses it to circulate the inside air in a way that blocks or minimizes the inflow of external air from the outside without windows.

The embodiments of the pig house air recirculation ventilation system of the present invention described above are merely illustrative, and those skilled in the art will recognize that various modifications and other equivalent embodiments are possible therefrom. You will know better. Therefore, it will be understood that the present invention is not limited to the forms mentioned in the detailed description above. Therefore, the true scope of technical protection of the present invention should be determined by the technical spirit of the attached patent claims. In addition, the present invention should be understood to include all modifications, equivalents and substitutes within the spirit and scope of the present invention as defined by the appended claims.

[Explanation of symbols]

1: Pig pen air recirculation ventilation system 10: Pig pen

11: discharge fan 13: inlet fan

15: Air quality detection sensor 100: Air purifier

110: Casing 111: Inlet

112: Internal air discharge pipe 113: Internal air inflow fan

115: Exit 117: Purified air blowing fan

120: Circulating water spray pipe 121: Spray nozzle

130: Filler layer 140: Eliminator

150: Circulating water tank 160: Circulating water supply pipe

170: Circulating water pump 171: Chemical supply tank

200: External air mixing module 210: Purified air inlet pipe

220: exhaust fan 230: mixed air discharge pipe

300: heat exchanger 310: temperature control air discharge pipe

400: UV sterilizer 410: Processed air inlet pipe

500: solar collector 510: solar collector

511: heat collecting coil 520: heat storage tank

521: Auxiliary heater 530: Heat medium circulation pipe

540: Pump 600: Control unit

700: Mobile terminal

A: Outside air

A1: Internal air

A2: Purified air

A3: Outdoor mixed air

A4: Temperature controlled air

A5: Processed air

L: solar power

P: Pig

M: heat medium

W: circulating water

W1: Closed circulating water

Claims

In the pig house air recirculation ventilation system that purifies the internal air of the pig house and then resupplies the treated air to the pig house,

The pig farm includes an exhaust fan (11) for discharging internal air, an inflow fan (13) for introducing treated air into the inside, and an air quality detection sensor (15) for detecting the temperature and humidity, carbon dioxide concentration, and ammonia concentration of the internal air. is provided,

an air purifier (100) that removes contaminants from the internal air (A1) discharged to the outside through the exhaust fan (11);

an external air mixer (200) that discharges a portion of the purified air (A2) discharged from the air purifier (100) to the outside and mixes the external air with the purified air (A2) to adjust the carbon dioxide concentration;

It is provided between the external air mixer (200) and the pig pen (10) to sterilize swine disease bacteria contained in the outdoor mixed air (A3) discharged from the external air mixer (200), and the sterilized treated air (A5) is used to sterilize the pig pen. A pig house air recirculation ventilation system comprising a UV sterilizer (400) supplied to (10).
According to paragraph 1,

a solar heat collection unit 500 provided on the upper part of the pig pen 10 to collect solar heat;

It is provided between the outside air mixer 200 and the UV sterilizer 400 and further includes a heat exchanger 300 that exchanges heat between the solar energy collected in the solar heat collection unit 500 and the outside air mixed air (A3). A pig house air recirculation ventilation system characterized by:
According to paragraph 2,

A control unit 600 that controls the amount of ventilation through the exhaust fan 11, the amount of outside air mixed in the outside air mixer 200, and the operation of the heat exchanger 300 according to the detection result of the air quality sensor 15. Contains more,

The control unit 600,

If the temperature of the internal air detected by the air quality sensor 15 is higher than the preset maximum temperature and higher than the temperature of the external air, the rotation speed of the exhaust fan 11 is increased and the external air mixing amount of the external air mixer 200 is increased. increases,

If the temperature of the internal air detected by the air quality sensor 15 is lower than the preset minimum temperature and lower than the temperature of the external air, the rotation speed of the exhaust fan 11 is increased and the external air of the external air mixer 200 is increased. Increase the mixing amount and operate the heat exchanger (300),

When the temperature of the internal air detected by the air quality sensor 15 is the optimal temperature between the preset minimum temperature and maximum temperature, the rotation speed of the exhaust fan 11 is increased and the external air mixer 200 is A pig house air recirculation ventilation system characterized by reducing the amount of air mixing.