Air purification device and ventilation system

Abstract

The present invention provides an air purification device and a ventilation system capable of efficiently removing dust contained in air in a building.　An air purification device 100 for removing dust contained in air in a building 90 comprises: a treatment container 2 having a water receiving portion 21, a side wall opening portion 22, and an upper end opening portion 23; a water spray nozzle portion 3 provided inside the treatment container 2 so as to be positioned at a height between the side wall opening portion 22 and the upper end opening portion 23; an exhaust fan 4 for the treatment container, the exhaust fan 4 being provided above the water spray nozzle portion 3 and generating a flow of air so as to take in air from the side wall opening portion 22 and exhaust the air from the upper end opening portion 23; and a water spray pump 5 that sprays treatment water downward from the water spray nozzle portion 3 toward the water receiving portion 21.

Description

Air Purification Apparatus and Ventilation System

[0001] The present invention relates to an air purification apparatus that removes dust contained in air inside a building, and a ventilation system including the same.

[0002] Conventionally, buildings such as livestock barns for raising livestock, and buildings (structures) for storing and operating various devices are equipped with facilities for air purification and ventilation.

[0003] For example, chicken houses for raising chickens are often equipped with a longitudinal ventilation system. In this longitudinal ventilation system, outside air taken in from an air inlet provided on one gable end of the chicken house is caused to flow in a direction longitudinally through the chicken house by an exhaust fan attached to an exhaust outlet on the other gable end, and is discharged out of the chicken house through the exhaust outlet for ventilation.

[0004] Conventionally, various improvements have been made to solve the problems of such ventilation systems (see, for example, Patent Document 1). Patent Document 1 discloses a ventilation system capable of reducing dust and noise emitted along with exhaust air.

[0005] In the ventilation system of Patent Document 1, a buffer chamber is formed by surrounding the front and both front side surfaces of the gable end of a chicken house to which an exhaust fan is attached with three substantially vertical wall surfaces, and at least one-third of a portion corresponding to the roof of the buffer chamber is closed by a closing member. A chimney-shaped enclosure is attached to the portion corresponding to the roof of the buffer chamber, and a net for capturing exhaust dust is horizontally attached to an opening of the chimney-shaped enclosure. Dust contained in exhaust air discharged out of the chicken house from the exhaust fan collides with the wall surfaces of the buffer chamber and falls to the bottom of the buffer chamber. Furthermore, the net enhances the effect of capturing dust in the exhaust air. This makes it possible to reduce the amount of dust released and diffused into the sky above from the opening in the roof of the buffer chamber, as well as reduce noise.

[0006] Japanese Unexamined Patent Publication No. 10-117624

[0007] However, while conventional ventilation systems like the one described in Patent Document 1 could reduce the amount of dust and noise to some extent, the ventilation system in Patent Document 1 used a mesh to remove fine dust, requiring periodic removal of blockages. Since the mesh was placed high up in the chicken coop, the work of removing blockages was cumbersome. Furthermore, Patent Document 1 did not consider the removal of odors contained in the exhaust gas discharged outside the chicken coop.

[0008] This invention has been made in consideration of the above circumstances, and its purpose is to provide an air purification device and ventilation system that can efficiently remove dust contained in the air inside a building.

[0009] The air purification device of the present invention is an air purification device for removing dust contained in the air inside a building, and comprises: a processing container having a water receiving section at the bottom, a side wall opening above the water receiving section, and an upper end opening above the side wall opening; a water spraying nozzle section provided inside the processing container at a height position between the side wall opening and the upper end opening; an exhaust fan for the processing container provided above the water spraying nozzle section and generating an airflow to take in air from the side wall opening and exhaust it from the upper end opening; and a water spraying pump that sprays treatment water downward from the water spraying nozzle section toward the water receiving section.

[0010] The ventilation system of the present invention comprises an air purification device and a duct connected to the upper end opening, wherein the duct is provided with an air supply passage for returning the air discharged from the inside of the processing container back into the inside of the building, and circulates air between the inside of the building and the processing container while removing dust.

[0011] According to the air purification device and ventilation system of the present invention, dust contained in the air inside a building can be removed efficiently.

[0012] Figure 1 is a plan cross-sectional view of a livestock barn equipped with a ventilation system according to the first embodiment of the present invention. Figure 2 is a side cross-sectional view of the main part of the ventilation system. Figure 3 is a plan cross-sectional view of the main part of the ventilation system, cut at the position of line A-A in Figure 2. Figure 4 is a plan view of the main part for explaining the arrangement and operation of the spray nozzle of the deodorizer spraying device relative to the exhaust fan for the processing container. Figure 5 is a control block diagram of the ventilation system. Figure 6 is a side cross-sectional view of the main part of the ventilation system and its surroundings according to the second embodiment of the present invention.

[0013] An air purification device according to one embodiment of the present invention is an air purification device for removing dust contained in the air inside a building, comprising: a processing container having a water receiving section at the bottom, a side wall opening above the water receiving section, and an upper end opening above the side wall opening; a water spraying nozzle section provided inside the processing container at a height position between the side wall opening and the upper end opening; an exhaust fan for the processing container provided above the water spraying nozzle section and generating an airflow to take in air from the side wall opening and exhaust it from the upper end opening; and a water spraying pump that sprays treatment water downward from the water spraying nozzle section toward the water receiving section (first configuration).

[0014] According to the above configuration, the exhaust fan for the processing container drives the air from inside the building containing dust into the processing container through the side wall opening. After being drawn into the processing container, the dust-containing air is guided towards the upper opening of the processing container. At this time, the dust in the air is captured by the treatment water sprayed downward from the water spray nozzle and falls into the water receiving section at the bottom of the processing container. As a result, the dust in the air is separated and treated as impurities in the processing container, allowing for efficient dust removal.

[0015] In the first configuration described above, a processing compartment is provided that houses one or more of the processing containers, and air from inside the building may be drawn into the processing compartment (second configuration).

[0016] According to the above configuration, air from inside the building is drawn into the treatment area before being drawn into the treatment containers, allowing for balanced air purification treatment in one or more treatment containers. Furthermore, one or more treatment containers can be arranged within the treatment area to efficiently draw in air.

[0017] In the first or second configuration described above, the configuration may further include a plurality of storage tanks for storing treated water discharged from the water receiving section to the outside of the treatment container, wherein the plurality of storage tanks include a storage tank for discharging impurities into which treated water containing impurities discharged from the treatment container flows, and which is equipped with an impurities discharge device for separating impurities contained in the treated water from the treated water and removing them to the outside, and a storage tank for supplying treated water into which treated water from which impurities have been separated in the storage tank for discharging impurities flows, and which supplies treated water to the sprinkling nozzle section by the sprinkling pump (third configuration).

[0018] According to the above configuration, impurities contained in the treated water discharged from the treatment container can be removed, and the treated water can be repeatedly circulated and reused.

[0019] In the third configuration described above, the system may have a plurality of processing containers, and the treated water containing impurities discharged from the plurality of processing containers may be separated for impurities in a common impurity discharge storage tank, and the treated water may be supplied from a common treated water supply storage tank to the sprinkling nozzles provided in the plurality of processing containers (fourth configuration).

[0020] With the above configuration, impurities contained in the treated water discharged from multiple treatment containers can be removed in a common storage tank, and the treated water can be repeatedly circulated and reused.

[0021] In the third or fourth configuration described above, the impurity discharge device may be a screen device having an impurity intake port provided in the impurity discharge water tank, an impurity discharge port provided outside the processing section housing the air purification device, and a conveyor section for transporting impurities from the impurity intake port to the impurity discharge port (fifth configuration).

[0022] According to the above configuration, impurities contained in the treated water discharged from the treatment container can be removed by the screen device and discharged outside the treatment area.

[0023] In the third to fifth configurations described above, the plurality of water tanks are stationary water tanks on which the sprinkling pump is located and which store the treated water discharged from the water receiving section to the outside of the treatment container, and the stationary water tanks may be installed above ground level (sixth configuration).

[0024] According to the above configuration, since excavation work is not required to install the water storage tank, the cost of constructing the ventilation system can be reduced. In addition, pre-manufactured, stationary water storage tanks can be transported by vehicle and easily installed on-site using cranes or other equipment.

[0025] A ventilation system according to one embodiment of the present invention comprises an air purification device having any of the first to sixth configurations described above, and a duct connected to the upper end opening, wherein the duct is provided with an air supply passage for returning the air discharged from inside the processing container back into the building, and the air may be circulated between the building and the processing container while removing dust (seventh configuration).

[0026] With the above configuration, dust is removed by the air purification device while the air inside the building is circulated. This allows the air inside the building to remain clean while suppressing the amount of outside air taken in. It also suppresses the discharge of air from inside the building to the outside.

[0027] In the seventh configuration described above, a control device is provided for controlling the drive of the exhaust fan for the processing container, and the control device may adjust the flow rate of air circulating between the inside of the building and the processing container by controlling the exhaust fan for the processing container (eighth configuration).

[0028] With the above configuration, dust removal and temperature control inside the building can be balanced appropriately according to the season and other factors.

[0029] In the eighth configuration described above, a plurality of processing containers are provided, and the control device may adjust the flow rate of air circulating between the inside of the building and the processing containers by individually controlling the exhaust fans for each processing container provided in the processing container (ninth configuration).

[0030] With the above configuration, multiple exhaust fans for processing containers can be appropriately controlled to balance dust removal and temperature control inside the building according to the season.

[0031] In the configurations seven to ninth described above, the duct may include a deodorizing and purifying unit, and the deodorizing and purifying unit may have a spray nozzle for spraying a liquid deodorizer into the air discharged from the processing container, and an exhaust port for discharging the deodorized and purified air to the outside (configuration ten).

[0032] According to the above configuration, odor components are decomposed by the liquid deodorant in the air discharged from the processing container, thus removing the odor.

[0033] In the above configurations 7 to 10, the exhaust fan for the processing container has blades that rotate around a vertical axis to generate a swirling flow, and the spray nozzle is positioned near the top of the exhaust fan for the processing container and may spray a liquid deodorizer toward the rotation center of the exhaust fan for the processing container (configuration 11).

[0034] With the above configuration, the movement of the exhaust fan for the processing container can be used to easily mix the liquid deodorizer sprayed from the spray nozzle with the air discharged from inside the processing container, thereby enabling efficient deodorization of the air inside the duct.

[0035] In the configurations described in the seventh to eleventh descriptions above, the duct is equipped with a damper that separates the deodorizing and purifying section from the air supply passage, the exhaust port is located downstream of the deodorizing and purifying section, and the damper may adjust the amount of air discharged from the exhaust port and switch between discharging and stopping the air from the exhaust port (configuration twelfth description).

[0036] With the above configuration, by closing the damper to prevent the liquid deodorizer sprayed from the spray nozzle from entering the air supply channel, it is possible to suppress the liquid deodorizer from entering the space inside the building through the air supply channel.

[0037] In the configurations described in the 10th to 12th above, a plurality of processing containers are provided, the upper opening of each processing container communicates with the internal space of a common deodorizing and purifying unit, and the bottom of the deodorizing and purifying unit may be connected to the side of each processing container (13th configuration).

[0038] With the above configuration, the upper openings of multiple processing containers communicate with the internal space of a common deodorizing and purifying unit, allowing for efficient odor removal treatment of the air discharged from the processing containers.

[0039] Embodiments of the present invention will be described below with reference to the drawings. In the following description, a livestock barn (chicken coop) will be used as an example of a building to which the air purification device and ventilation system of the present invention are applied.

[0040] Furthermore, the buildings to which the air purification device and ventilation system of the present invention can be applied are not limited to livestock barns (chicken houses). For example, the air purification device and ventilation system of the present invention can be applied to buildings used for purposes in which dust is easily generated inside and dust is easily contained in the internal air. Examples of buildings include not only chicken houses, but also barns for cattle, pigs, horses, manure, etc., as well as livestock facilities that combine barns and processing facilities. In addition, the building may be a building (structure) for housing and operating manufacturing equipment, machinery, processing equipment, etc. An example of a processing equipment housed and operated in a building is a waste incineration device (for example, Japanese Patent Application Publication No. 2024-171823) that ferments and dries waste such as food waste before incinerating it.

[0041] [First Embodiment] Figure 1 is a plan cross-sectional view of a livestock barn 90 equipped with an air purification device 100 and a ventilation system 101 according to the first embodiment of the present invention. Figure 2 is a side cross-sectional view of the main part of the ventilation system 101. Figure 3 is a plan cross-sectional view of the main part of the ventilation system 101, cut at the position of line A-A in Figure 2. The ventilation system 101 of the first embodiment is applied as a ventilation system for longitudinal ventilation in a livestock barn (chicken house) 90.

[0042] As shown in Figure 1, the livestock shed (chicken house) 90 is formed in a long, narrow rectangular shape in plan view. The longitudinal end of the livestock shed 90 is the gable end. An entrance 93 and an air intake 92 with an opening / closing function are provided on the first side wall 90a of one gable end of the livestock shed 90. In addition, a plurality of livestock shed-side exhaust fans 91 are provided on the second side wall 90b of the other gable end of the livestock shed 90. The interior space of the livestock shed 90 is the space subject to air purification treatment by the air purification device 100 and the ventilation system 101. The interior space of the livestock shed 90 is referred to as the air treatment target space S2.

[0043] The entrance / exit 93 is provided for workers to enter and exit the livestock shed 90. The entrance / exit 93 is configured to be openable and closable by a shutter (not shown). The openable / closable air inlet 92 is provided to bring outside air from outside the livestock shed 90 into the interior of the livestock shed 90 (air treatment target space S2). The openable / closable air inlet 92 has, for example, a movable louver that rotates in the vertical direction. It is configured so that the opening / closing and the amount of outside air taken in can be adjusted by changing the angle of the louver.

[0044] The barn-side exhaust fan 91 has a blade portion that rotates about a horizontal axis. The barn-side exhaust fan 91 has a function of exhausting air from the air treatment target space S2 to the outside of the gable second side wall 90b. In the first embodiment, an example is shown in which the ventilation system 101 is retrofitted to an existing barn 90. The barn-side exhaust fan 91 is provided for exhausting air inside the existing barn 90 to the outdoors. As a configuration of the ventilation system 101, the barn-side exhaust fan 91 is not essential. In the first embodiment, the barn-side exhaust fan 91 provided in the existing barn 90 is left. However, when installing the air purification device 100 and the ventilation system 101, the dust removal net that has been attached to the barn-side exhaust fan 91 is in a removed state. This is because dust can be removed by the air purification device 100 and the ventilation system 101.

[0045] Inside the barn 90 (the air treatment target space S2), a plurality of chicken breeding cages 94 are installed. The plurality of breeding cages 94 are provided so as to be parallel to each other and extend along the longitudinal direction of the barn 90.

[0046] As shown in Figs. 1 to 3, the ventilation system 101 of the first embodiment includes a treatment compartment S1 adjacent to the outside of the gable second side wall 90b of the barn 90. The air purification device 100 and the ventilation system 101 are mainly accommodated in the treatment compartment S1. In the present embodiment, the air purification device 100 and the ventilation system 101 are retrofitted to the outside of the existing barn 90 (corresponding to a building). Therefore, the treatment compartment S1 is configured to be retrofitted to the outside of the air treatment target space S2. However, it goes without saying that the treatment compartment S1 and the air treatment target space S2 can be constructed as the same building.

[0047] The treatment compartment S1 is covered by surrounding side walls 101a and a roof 101c. In the treatment compartment S1, main devices for removing dust such as feed and feathers contained in the air of the air treatment target space S2, performing deodorization and sterilization are arranged.

[0048] Specifically, the ventilation system 101 comprises: a plurality of processing vessels each having a side wall opening 22 and an upper end opening 23; a water spray nozzle unit 3 provided inside each processing vessel 2; a processing vessel exhaust fan 4 provided at the upper end opening 23 of each processing vessel 2; a water spray pump 5 for supplying processing water to the water spray nozzle units 3 of all the processing vessels 2; a water storage tank 7 for storing the processing water; a screen device 8 that separates impurities contained in the processing water and takes the impurities out to the outside; a duct 141 connected to the upper end openings 23 of all the processing vessels 2; and a deodorant spraying device 61. Among these, the air purification device 100 is constituted by the processing vessels 2, the water spray nozzle units 3, the processing vessel exhaust fans 4, the water spray pump 5, the water storage tank 7, and the screen device 8.

[0049] The processing vessel 2 is formed in a shape that extends upward from the bottom in a substantially cylindrical shape. In the first embodiment, three processing vessels 2 are arranged side by side in the longitudinal direction of the livestock barn 90 in the processing compartment S1. Further, six processing vessels 2 are arranged side by side in the width direction of the livestock barn 90 in the processing compartment S1. That is, in the present embodiment, a total of 18 processing vessels 2 are arranged side by side in the processing compartment S1. Note that the number and arrangement of the processing vessels 2 are not limited thereto. The number and arrangement of the air purification devices 100 and the ventilation systems 101 can be changed according to the size and shape of a building and the required air processing capacity.

[0050] As shown in FIG. 2, the processing vessel 2 includes a water receiving portion 21 at the bottom. The side wall opening 22 is provided above the water receiving portion 21. The side wall openings 22 are a plurality of slits provided on the outer circumferential surface of the processing vessel 2. The side wall opening 22 is provided for taking in air from an air processing target space S2 guided to the processing compartment S1 into the interior of the processing vessel 2.

[0051] The watering nozzle section 3 is positioned at a height between the side wall opening 22 and the upper end opening 23. The watering nozzle section 3 is configured to spray treatment water over the entire horizontal cross-section of the treatment container 2 by arranging it radially from the center to the periphery, for example. The watering nozzle section 3 may also be configured to spray treatment water in a spiral pattern toward the water receiving section 21 below. For example, by directing the discharge port of the watering nozzle section 3 diagonally downward instead of vertically downward, treatment water can be sprayed in a spiral pattern. This allows treatment water to be sprayed evenly and at high density over the entire horizontal cross-section of the treatment container 2. The water droplets of treatment water sprayed from the watering nozzle section 3 in a shower-like manner and falling downward at high speed collide with dust in the air taken in through the side wall opening 22, or adsorb and collect the dust, thereby causing the dust to fall into the water receiving section 21 together with the treatment water.

[0052] In the first embodiment, the internal space of the processing container 2 between the watering nozzle section 3 and the water receiving section 21 below it is hollow. In other words, no components are placed there. As a result, even if a large amount of dust is taken into the processing container 2 from the side wall opening 22, the problem of dust clogging between the watering nozzle section 3 and the water receiving section 21 does not occur.

[0053] The exhaust fan 4 for the processing container generates an airflow that takes in air from inside the livestock shed 90 through the side wall opening 22 and exhausts it through the upper end opening 23. The exhaust fan 4 for the processing container has a blade section 4b that rotates around a vertical axis to generate a swirling flow, and a motor section 4a that rotates the blade section 4b. The air taken into the processing container 2 through the side wall opening 22 has dust removed by the processing water sprayed from the water spray nozzle section 3 on its way to the upper end opening 23.

[0054] Furthermore, the air temperature is adjusted by the efficient heat exchange between the air flowing upward inside the processing container 2 and the treated water sprayed downward from the watering nozzle section 3. Specifically, in the summer, the air temperature inside the livestock barn 90 is high, and the temperature of the air taken into the processing container 2 through the side wall opening 22 is also high. This air undergoes heat exchange with the treated water inside the processing container 2, which lowers the temperature of the air discharged from the upper end opening 23.

[0055] Inside the processing container 2, a fall prevention member 16 is positioned between the water spray nozzle section 3 and the exhaust fan 4 for the processing container. The fall prevention member 16 is formed, for example, in a mesh shape. If any object falls into the upper end opening 23, the fall prevention member 16 prevents the object from falling to the water receiving section 21. The fall prevention member 16 also suppresses the discharge of water spray from the upper end opening 23. Since the air directed upward from the water spray nozzle section 3 has already had dust removed, there is no risk of dust clogging the fall prevention member 16.

[0056] In the water receiving section 21 of the processing container 2, dust that has fallen due to the action of the treatment water sprayed from the watering nozzle section 3 is stored as impurities. The ventilation system 101 has a function to prevent excessive accumulation of these impurities in the water receiving section 21. Specifically, the ventilation system 101 includes a water storage tank 7 that stores the treatment water discharged from the water receiving section 21 to the outside of the processing container 2, and a screen device 8 that is installed in the water storage tank 7 and separates impurities contained in the treatment water from the treatment water and removes them to the outside.

[0057] Multiple water storage tanks are installed. In this embodiment, the water storage tank 7 includes a first water storage tank 71, a second water storage tank 72, and a third water storage tank 73. The first water storage tank 71 is equipped with a screen device 8. In the first water storage tank 71, impurities contained in the treated water are separated by the screen device 8. The first water storage tank 71 is located below the bottom of the treatment container 2. In this embodiment, the first water storage tank 71 is located below the ground level G. The first water storage tank 71 is connected to the water receiving sections 21 of all treatment containers 2 by transfer pipes 11. The first water storage tank 71 corresponds to the impurity discharge water storage tank of the present invention.

[0058] The screen device 8 separates impurities contained in the treated water and removes them to the outside. The screen device 8 has an impurity intake port 8b that opens in the treated water stored in the first water tank 71. The impurity intake port 8b is provided at the lower end of the screen device 8. The screen device 8 also has a conveyor section 8a for transporting impurities diagonally upward from the impurity intake port 8b. An impurity discharge port 8c is provided at the upper end of the screen device 8. The impurity discharge port 8c is exposed to the outside of the side wall 101a that surrounds the treatment section S1. The impurities discharged from the impurity discharge port 8c are collected by a trolley C and processed at another location. Various methods can be used for the screen device 8 to suit the characteristics of the impurities contained in the treated water. The screen device 8 corresponds to the impurity discharge device of the present invention.

[0059] The second water tank 72 is located adjacent to the first water tank 71. The second water tank 72 is located lower than the first water tank 71. Treated water, from which impurities have been almost completely removed, flows into the second water tank 72 from the first water tank 71 through the inter-tank transfer pipe 15. In the second water tank 72, some impurities that could not be completely removed in the first water tank 71 are allowed to settle and be removed.

[0060] The third water tank 73 is located adjacent to the second water tank 72. Only the supernatant portion of the treated water from the second water tank 72 is stored in the third water tank 73. A sprinkler pump 5 is located in the third water tank 73. The sprinkler pump 5 is connected to the sprinkler nozzle section 3 by a water supply pipe 51. The treated water stored in the third water tank 73 is pumped up by the sprinkler pump 5 and supplied to the sprinkler nozzle section 3 through the water supply pipe 51. The third water tank 73 corresponds to the treated water supply tank of the present invention.

[0061] The treated water, sprayed from the watering nozzle section 3 and falling into the water receiving section 21, is discharged again into the water storage tank 7. After impurities are removed in the water storage tank 7, the treated water is sprayed from the watering nozzle section 3 by the watering pump 5. In other words, the treated water is circulated and reused repeatedly.

[0062] As described above, the treated water is circulated and reused. As the treated water is circulated, some of it evaporates, and the total amount gradually decreases. Therefore, water is replenished as needed to maintain the total amount. Water is replenished through the water replenishment pipe 12. The downstream end of the water replenishment pipe 12 is positioned at a height slightly above the water receiving section 21 of each treatment container 2. An electrically operated water replenishment valve 121 is provided in the middle of the water replenishment pipe 12. The water replenishment valve 121 is opened when water is replenished to the water receiving section 21. It is also preferable to provide a buffer tank for treated water to suppress fluctuations in the treated water due to evaporation (not shown). Alternatively, wastewater generated from the entire livestock barn 90 may be used as the water for replenishment. This allows for evaporation treatment of the wastewater generated in the livestock barn 90.

[0063] The deodorizer spraying device 61 is a device that sprays liquid deodorizer into the air discharged from the processing container 2. In the ventilation system 101, hypochlorous acid water is used as the liquid deodorizer. The deodorizer spraying device 61 comprises a deodorizer storage unit 611, a deodorizer supply pump 612, a supply amount adjustment valve 613, and a plurality of spray nozzles 614. The deodorizer storage unit 611 is a container for storing hypochlorous acid water. The deodorizer storage unit 611 may also include a hypochlorous acid water generator.

[0064] Figure 4 is a plan view of the main components illustrating the arrangement and operation of the spray nozzles 614 of the deodorizer spraying device 61 relative to the exhaust fan 4 for the processing container. As shown in Figures 2 and 4, a pair of spray nozzles 614 are provided for each processing container 2. Specifically, a pair of spray nozzles 614 are attached to the upper end opening 23 of each processing container 2 via a bracket 615 (see Figure 4). The pair of spray nozzles 614, 614 are located near the top of the exhaust fan 4 for the processing container. Furthermore, as shown in Figure 4, these pair of spray nozzles 614, 614 spray hypochlorous acid water toward the rotation center O of the exhaust fan 4 for the processing container. The exhaust fan 4 for the processing container generates a swirling flow (direction of arrow A in Figure 4) by the rotation of the blades 4b. Turbulence also occurs near the blades 4b. Hypochlorous acid water is sprayed from the pair of spray nozzles 614, 614 toward this region.

[0065] As shown in Figure 2, all spray nozzles 614, which are provided to correspond to the multiple processing containers 2, are connected to a deodorant storage section 611 and a deodorant supply channel 61a. A deodorant supply pump 612 and a supply volume adjustment valve 613 are provided in the middle of the deodorant supply channel 61a. The deodorant supply pump 612 supplies hypochlorous acid water contained in the deodorant storage section 611 to the spray nozzles 614. The supply volume adjustment valve 613 is located between the spray nozzles 614 and the deodorant supply pump 612. The supply volume adjustment valve 613 is electrically operated and adjusts the amount of hypochlorous acid water sprayed from the spray nozzles 614.

[0066] As shown in Figures 2 and 3, the duct 141 is connected to the upper end openings 23 of all the processing containers 2. The duct 141 includes a deodorizing and purifying section 1411 and an air supply passage 1412. Figure 3 shows the deodorizing and purifying section 1411 cut along the line A-A in Figure 2. The deodorizing and purifying section 1411 mainly consists of an upper part 1411a, a bottom part 1411b, and a side part 1411c. Inside the deodorizing and purifying section 1411, a space is formed for performing deodorizing and purifying treatment on the air discharged from the processing containers 2. The deodorizing and purifying section 1411 is arranged to cover the upper end openings 23 of all the processing containers 2 from above. The deodorizing and purifying section 1411 is formed in a box shape, with its horizontal dimension being several times larger than its vertical dimension.

[0067] The upper openings 23 of all processing containers 2 are in communication with the internal space of the deodorizing and purifying unit 1411. Figure 3 shows the bottom 1411b of the deodorizing and purifying unit 1411 and all the upper openings 23. As shown in Figure 3, all the upper openings 23 are exposed from the bottom 1411b and are in communication with the internal space of the deodorizing and purifying unit 1411. The bottom 1411b is connected to the side surfaces of each processing container 2 of the deodorizing and purifying unit 1411. The connection point between the bottom 1411b and the side surfaces of each processing container 2 is above the side wall opening 22. In this embodiment, the bottom 1411b and the side surfaces of each processing container 2 are connected at the position of the upper opening 23.

[0068] Since the upper openings 23 of all processing containers 2 are connected to the internal space of the deodorizing and purifying unit 1411, the air discharged from all processing containers 2 is discharged into the deodorizing and purifying unit 1411. Spray nozzles 614 are arranged inside the deodorizing and purifying unit 1411, corresponding to the upper openings 23 of each processing container 2.

[0069] Inside the deodorizing and purifying unit 1411, hypochlorous acid water sprayed by the spray nozzle 614 acts on the air discharged from the processing container 2. This deodorizes and sterilizes ammonia and bacteria floating in the air. In this embodiment, after deodorization and sterilization are performed by the spray nozzle 614 corresponding to the upper end opening 23 of each of the multiple processing containers 2, the air is discharged into the common internal space of the deodorizing and purifying unit 1411. Therefore, the air is agitated within the internal space of the deodorizing and purifying unit 1411, ensuring thorough deodorization and sterilization. This enhances the effectiveness of the deodorizing and sterilizing treatment on the air.

[0070] An exhaust port 1416 with an opening / closing function is provided on one side of the side wall 101a that constitutes the processing section S1. The deodorizing and purifying unit 1411 is connected to the exhaust port 1416 with an opening / closing function. By opening the exhaust port 1416, the air that has been deodorized and sterilized in the deodorizing and purifying unit 1411 can be discharged to the outside. In this embodiment, the exhaust port 1416 with an opening / closing function has a movable louver that rotates in the vertical direction. The opening / closing and the amount of air discharged can be adjusted by changing the angle of the louver.

[0071] The ventilation system 101 of the first embodiment purifies the air inside the livestock barn 90 by removing dust in the processing container 2 and deodorizing and sterilizing in the deodorizing and purifying unit 1411. In addition, the air inside the livestock barn 90 is made temperature-controlled by heat exchange with treatment water sprayed inside the processing container 2. The ventilation system 101 of this embodiment can return the air that has been purified and temperature-controlled in the processing container 2 and the deodorizing and purifying unit 1411 back into the livestock barn 90 through the air supply channel 1412.

[0072] As shown in Figures 1 and 2, the air supply passage 1412 has a main pipe section 1413 and a plurality of sub-pipe sections 1414. One end of the main pipe section 1413 is connected to the center of the upper surface of the deodorizing and purifying section 1411. The main pipe section 1413 extends horizontally in the longitudinal direction of the livestock shed 90, penetrating the second side wall 90b on the gable side of the livestock shed 90 from above the deodorizing and purifying section 1411. The other end of the main pipe section 1413 is located near the first side wall 90a on the gable side of the livestock shed 90.

[0073] The main pipe section 1413 is positioned at a height near the ceiling of the livestock shed 90. The main pipe section 1413 is also located in the center of the shorter side of the livestock shed 90. Multiple sub-pipe sections 1414 are connected to the main pipe section 1413 at predetermined intervals along its longitudinal direction. Each sub-pipe section 1414 extends horizontally from the main pipe section 1413 outward in the shorter side of the livestock shed 90.

[0074] Each sub-pipe section 1414 is provided with multiple air inlets 1415. Air purified and temperature-controlled in the processing container 2 passes through the main pipe section 1413 and the sub-pipe sections 1414 and is supplied to the air treatment space S2 from the air inlets 1415. The direction of each air inlet 1415 is set to supply air downwards where the rearing cages 94 are located and toward the exhaust fan 91 on the barn side. In the first embodiment, the airflow in the air supply passage 1412 is generated by the driving force of the exhaust fan 4 for the processing container. Alternatively, another air supply fan may be provided inside the air supply passage 1412.

[0075] Figure 5 is a control block diagram of the ventilation system 101. As shown in Figure 5, the ventilation system 101 of this embodiment includes a control device 101b for air conditioning the air treatment target space S2. The control device 101b is electrically connected to an air inlet 92 with an opening / closing function, a barn-side exhaust fan 91, a barn-type condition sensor 95, an exhaust fan 4 for the treatment container, an exhaust port 1416 with an opening / closing function, a water supply valve 121, a sprinkler pump 5, a deodorizer supply pump 612, a supply amount adjustment valve 613, and a screen device 8. The control device 101b optimally controls the operation of each device according to the conditions of the air treatment target space S2 acquired by the barn-type condition sensor 95. The barn-type condition sensor 95 is placed in the air treatment target space S2. The barn-type condition sensor 95 is configured to acquire the temperature, humidity, oxygen concentration, etc. of the air treatment target space S2.

[0076] When the control device 101b takes in outside air to be treated in the air treatment space S2, purifies the air in the air treatment space S2, and actively discharges it outside the livestock barn 90, it opens the air inlet 92 with an opening / closing function and the exhaust port 1416 with an opening / closing function. The control device 101b then drives the livestock barn-side exhaust fan 91, the exhaust fan 4 for the treatment container, the watering pump 5, and the deodorizer supply pump 612. Through this control, fresh air is introduced into the air treatment space S2 from the air inlet 92 with an opening / closing function.

[0077] Furthermore, the air in the air treatment area S2 is moved from the air treatment area S2 to the treatment area S1 by the drive of the barn-side exhaust fan 91. In the treatment area S1, the exhaust fan 4 for each treatment container 2 draws air into the treatment container 2 through the side wall opening 22 provided in each treatment container 2.

[0078] Inside the processing container 2, treatment water is sprayed from the watering nozzle section 3 to separate dust such as feathers and feed contained in the air. The air from which the dust has been removed is discharged from the upper end opening 23 to the deodorizing and purifying section 1411. Then, the air is deodorized and sterilized by hypochlorous acid water sprayed from the spray nozzle 614. The clean air after the deodorizing and sterilizing treatment is exhausted to the outside from an exhaust port 1416 with an opening and closing function, which is provided at one end of the deodorizing and purifying section 1411.

[0079] Inside the processing container 2, dust separated by water sprayed from the water spray nozzle section 3 is accumulated as impurities in the water receiving section 21. The water mixed with impurities is sent from the water receiving section 21 to the water storage tank 7. When a certain amount of impurities accumulates in the water storage tank 7, the screen device 8 is activated to separate and remove the impurities.

[0080] On the other hand, if the outside temperature is extremely high or low compared to the optimal temperature for raising livestock, it may be better not to introduce outside air into the air-treated space S2 in order to maintain a constant temperature in the air-treated space S2. In this case, the intake of outside air is suppressed, dust is removed between the air-treated space S2 and the treatment container 2, and the air in the air-treated space S2 is circulated.

[0081] Specifically, the control device 101b closes the air inlet 92 with opening / closing function and the exhaust port 1416 with opening / closing function. The control device 101b then drives the barn-side exhaust fan 91, the exhaust fan 4 for the processing container, and the sprinkler pump 5. The air in the air treatment target space S2 is moved from the air treatment target space S2 to the processing section S1 by the driving of the barn-side exhaust fan 91.

[0082] In the processing section S1, an exhaust fan 4 for each processing container 2 draws air into the processing container 2 through a side wall opening 22 provided in each processing container 2. Inside the processing container 2, dust contained in the air is separated by the spraying of processing water from the water spray nozzle 3. The air from which the dust has been removed is discharged to the deodorizing and purifying unit 1411 through the upper end opening 23.

[0083] The air, after deodorization and sterilization, is returned from the deodorization and purification unit 1411 to the air treatment space S2 of the livestock barn 90 via the air supply channel 1412. At this time, the flow rate of the air supplied from the air inlet 1415 of the air supply channel 1412 to the air treatment space S2 is adjusted based on the temperature, humidity, and oxygen concentration of the air treatment space S2 acquired by the livestock barn condition monitoring sensor 95. The air flow rate can be adjusted by controlling the drive of the exhaust fan 4 for the treatment container. Specifically, the control device 101b adjusts the rotation speed of the blades 4b by inverter control of the motor section 4a of the exhaust fan 4 for the treatment container. Increasing the rotation speed of the blades 4b increases the air flow rate. Conversely, decreasing the rotation speed of the blades 4b decreases the air flow rate.

[0084] In the first embodiment, 18 processing containers 2 are provided. Accordingly, a total of 18 exhaust fans 4 for the processing containers are also provided. The control device 101b may change the overall flow rate of air passing through the air supply passage 1412 by setting some of the exhaust fans 4 for the processing containers to a low rotation speed and others to a high rotation speed. Alternatively, the control device 101b may change the overall flow rate of air passing through the air supply passage 1412 by stopping some of the exhaust fans 4 for the processing containers and driving others. The control device 101b controls the exhaust fans 4 for the processing containers to adjust the flow rate of air circulating between the inside of the livestock barn 90 and the processing containers 2 and the deodorizing and purifying unit 1411. Inside the processing containers 2, the temperature of the air is adjusted by heat exchange with the water to be treated. This makes it possible to maintain a constant temperature of the air in the air treatment target space S2.

[0085] [Embodiment 2] Next, an air purification device 100A and a ventilation system 102 according to Embodiment 2 of the present invention will be described. Figure 6 is a side cross-sectional view of the ventilation system 102 and its surrounding parts according to the second embodiment of the present invention. Compared with the ventilation system 101 of the first embodiment, the ventilation system 102 of the second embodiment has a different structure for the water storage tank 7 and the duct 141. In Figure 6, components with the same structure as the ventilation system 101 of the first embodiment are given the same reference numerals, and their description is omitted.

[0086] As shown in Figure 6, the ventilation system 102 of the second embodiment includes a sprinkler pump 5 and a stationary water storage tank 700 that stores treated water discharged from the water receiving section 21 to the outside of the treatment container 2. The external shape of the stationary water storage tank 700 is formed to be approximately a rectangular parallelepiped or approximately cylindrical. The stationary water storage tank 700 is located together with the treatment container 2 in a treatment area S1 adjacent to the outside of the second side wall 90b on the gable side of the livestock shed 90. In the second embodiment, the treatment area S1 is covered by surrounding side walls 102a and a roof 102c. The stationary water storage tank 700 is installed on the floor surface of the building covered by the side walls 102a and the roof 102c. The stationary water storage tank 700 is installed above ground level G. Note that the side walls 102a and the roof 102c do not necessarily have to be provided.

[0087] The side wall of the stationary water storage tank 700 is provided with an upper opening 700a and a lower opening 700b. The upper opening 700a is located higher than the vertical center of the stationary water storage tank 700. The lower opening 700b is located lower than the upper opening 700a. The lower opening 700b is located near the bottom wall of the stationary water storage tank 700. The upper opening 700a of the stationary water storage tank 700 and the upper part of the water receiving section 21 of the treatment container 2 are connected by a drainage transfer pipe 706. In addition, the lower opening 700b of the stationary water storage tank 700 and the lower end of the water receiving section 21 of the treatment container 2 are connected by a sludge discharge pipe 704.

[0088] The stationary water storage tank 700 is equipped with a first partition wall 701 and a second partition wall 702 inside. The first partition wall 701 extends from the bottom wall of the stationary water storage tank 700 to the top of the stationary water storage tank 700. The first partition wall 701 divides the inside of the stationary water storage tank 700 into a sludge sedimentation tank R1 and a supernatant water storage tank R2. The sludge sedimentation tank R1 corresponds to the water storage tank for discharging impurities of the present invention, and the supernatant water storage tank R2 corresponds to the water storage tank for supplying treated water of the present invention.

[0089] The second partition wall 702 is provided to partition the sludge sedimentation tank R1. The second partition wall 702 extends from the ceiling wall of the fixed water storage tank 700 to the height of the lower part of the fixed water storage tank 700. As a result, the second partition wall 702 partitions the sludge sedimentation tank R1 from the upper end to the central part in the vertical direction.

[0090] The side wall of the stationary water tank 700 that forms the sludge sedimentation tank R1 is provided with the aforementioned upper opening 700a and lower opening 700b. Treatment water accumulated in the water receiving section 21 of the treatment container 2 flows into the sludge sedimentation tank R1 through the drainage transfer pipe 706. In addition, sludge (impurities) accumulated at the bottom of the water receiving section 21 of the treatment container 2 flows into the sludge sedimentation tank R1 through the sludge discharge pipe 704.

[0091] A sludge recovery pump 703 is installed at the bottom of the sludge sedimentation tank R1. The sludge recovery pump 703 discharges the sludge (impurities) accumulated at the bottom of the sludge sedimentation tank R1 to the outside of the stationary water storage tank 700 through piping. The supernatant portion of the treated water accumulated in the sludge sedimentation tank R1 overflows from the upper end of the first partition wall 701 and flows out into the supernatant water storage tank R2. The sludge recovery pump 703 corresponds to the impurities discharge device of the present invention.

[0092] The supernatant storage tank R2 stores the supernatant portion of the treated water that flows out of the sludge sedimentation tank R1. A sprinkler pump 5 is located at the bottom of the supernatant storage tank R2. The treated water stored in the supernatant storage tank R2 is supplied by the sprinkler pump 5 to the sprinkler nozzle section 3 through the water supply pipe 51. The treated water, which is sprinkled spirally from the sprinkler nozzle section 3 and falls into the water receiving section 21, moves to the supernatant storage tank R2 after the sludge (impurities) has been removed in the sludge sedimentation tank R1. The treated water stored in the supernatant storage tank R2 is then sprayed again from the sprinkler nozzle section 3 by the pump 5. In other words, the treated water is circulated and reused repeatedly.

[0093] A water supply pipe 705 is connected to the stationary water storage tank 700. The water supply pipe 705 is provided to replenish the water supply when the amount of treated water decreases due to evaporation or other reasons. The water from the water supply pipe 705 is poured into the sludge sedimentation tank R1 or the supernatant water storage tank R2.

[0094] The duct 142 of the ventilation system 102 includes a deodorizing and purifying section 1421, an air supply passage 1422, an exhaust passage 1423, and a damper 1424. The deodorizing and purifying section 1421 is located above the upper end opening 23 of the processing container 2. Air discharged from inside the processing container 2 enters the deodorizing and purifying section 1421. Inside the deodorizing and purifying section 1421, hypochlorous acid water sprayed by a spray nozzle 614 acts on the air discharged from inside the processing container 2. This deodorizes and sterilizes ammonia and bacteria floating in the air.

[0095] The exhaust passage 1423 is provided to discharge the air that has been deodorized and sterilized by the deodorizing and purifying unit 1421 to the outside. The deodorizing and purifying unit 1421 is located in the exhaust passage 1423. The deodorizing and purifying unit 1421 is located above the damper 1424 (downstream). An exhaust port 1423a is provided at the downstream end of the exhaust passage 1423, which is downstream of the deodorizing and purifying unit 1421. The deodorizing and purifying unit 1421 is in communication with the exhaust port 1423a. In the second embodiment, the hypochlorous acid water sprayed from the spray nozzle 614 of the deodorizing and purifying unit 1421 is configured not to enter the air supply passage 1422.

[0096] The damper 1424 is installed at the boundary between the exhaust passage 1423 and the air supply passage 1422, separating the deodorizing and purifying unit 1421 from the air supply passage 1422. The damper 1424 can be adjusted in degree of opening. The damper 1424 can completely open or close the exhaust passage 1423, or adjust the degree of opening of the exhaust passage 1423. In this way, the damper 1424 can adjust the amount of air discharged from the exhaust passage 1423. By closing the damper 1424 and completely closing the exhaust passage 1423, the discharge of air from the exhaust passage 1423 can be stopped.

[0097] The air supply channel 1422 connects the deodorizing and purifying unit 1421 to the air inlet 1425 provided in the first side wall 90a on the end side of the livestock shed 90. The purified air from which dust has been removed in the processing container 2 passes through the air supply channel 1422 and is returned to the air treatment space S2 of the livestock shed 90 through the air inlet 1425. This circulates the air between the inside of the livestock shed 90 and the processing container 2 and the deodorizing and purifying unit 1421 while removing dust.

[0098] The temperature, humidity, oxygen concentration, carbon dioxide concentration, etc., of the air in the air-treatment space S2 are adjusted by adjusting the rotation speed of the exhaust fan 4 for the treatment container and the degree to which the damper 1424 is opened. In this second embodiment, by closing the damper 1424, the hypochlorous acid water sprayed from the spray nozzle 614 does not enter the air-treatment space S2 through the air supply channel 1422 and the air inlet 1425. As a result, the hypochlorous acid water does not adversely affect the chickens in the chicken coop.

[0099] As described above, according to the ventilation systems 101 and 102 of the first and second embodiments, the air inside the livestock barn 90 is drawn into the processing container 2 through the side wall opening 22 by the drive of the exhaust fan 4 for the processing container. The air inside the livestock barn 90 contains airborne dust from livestock feed and feathers, and this dust is drawn into the processing container 2 along with the air. After the air inside the livestock barn 90 is drawn into the processing container 2, it is guided toward the upper end opening 23 of the processing container 2. At this time, the airborne dust is captured by the treatment water sprayed downward from the water spraying nozzle 3 and falls into the water receiving section 21 at the bottom of the processing container 2. As a result, the airborne dust is separated and treated as impurities in the processing container 2. Furthermore, since the dust can be separated as impurities by falling into the water receiving section 21, the problem of clogging of the dust removal mesh, which occurs in conventional ventilation systems, does not occur. As a result, dust can be removed efficiently.

[0100] Furthermore, the air taken into the processing container 2 undergoes heat exchange with the treated water sprayed from the watering nozzle 3. This allows the temperature of the air taken into the processing container 2 to be adjusted. In particular, during the summer, the air inside the livestock barn 90 tends to become hot. By exchanging heat between the treated water sprayed from the watering nozzle 3 and the air inside the livestock barn 90, the temperature of the air can be effectively lowered.

[0101] Furthermore, since dust removal is performed while the air inside the barn 90 is circulated, the amount of outside air taken in can be suppressed while maintaining clean air inside the barn 90. This eliminates the need to take in hot outside air in the summer or cold outside air in the winter, making it easier to maintain a constant temperature inside the barn 90. This helps maintain a good breeding environment inside the barn 90. In addition, since the amount of outside air taken in can be suppressed, it is possible to suppress the entry of pathogens such as avian influenza and swine fever into the barn. This makes it less likely for livestock to contract diseases from pathogens from outside. Also, since the amount of air discharged from inside the barn 90 can be suppressed, the environment around the barn 90 can be improved.

[0102] The ventilation system 101 of the first embodiment described above includes a control device 101b that controls the drive of the exhaust fan 4 for the processing container. The control device 101b adjusts the flow rate of air circulating between the inside of the livestock barn 90 and the processing container 2 by controlling the exhaust fan 4 for the processing container.

[0103] With the above configuration, dust removal and temperature control inside the livestock barn 90 can be carried out in a balanced manner according to changes in the number of livestock being raised and the season.

[0104] The ventilation systems 101 and 102 of the first and second embodiments described above include deodorizing and purifying units 1411 and 1421 that communicate with the exhaust ports 1416 and 1423a. The deodorizing and purifying units 1411 and 1421 are provided with spray nozzles 614 for spraying hypochlorous acid water as a liquid deodorizer.

[0105] According to the above configuration, when air is discharged from the inside of the processing container 2 to the ducts 141 and 142, malodorous components such as ammonia are decomposed by hypochlorous acid water sprayed by the deodorizing and purifying units 1411 and 1421, and the odor is removed. As a result, when air is discharged from the exhaust ports 1416 and 1423a downstream of the deodorizing and purifying units 1411 and 1421, the diffusion of dust and malodorous odors outside the livestock barn 90 is suppressed.

[0106] The ventilation system 102 of the second embodiment described above includes a damper 1424 that separates the deodorizing and purifying unit 1421 from the air supply passage 1422. The exhaust port 1423a is located downstream of the deodorizing and purifying unit 1421.

[0107] With the above configuration, closing the damper 1424 prevents the hypochlorous acid water sprayed from the spray nozzle 614 from entering the air supply channel 1422. As a result, the hypochlorous acid water does not enter the air-treated space S2 through the air supply channel 1422, thus suppressing the effects of the hypochlorous acid water on livestock in the barn.

[0108] In the ventilation system 101 of the first embodiment described above, the exhaust fan 4 for the processing container has a blade portion 4b that rotates around a vertical axis to generate a swirling flow. The spray nozzle 614 is positioned near the top of the exhaust fan 4 for the processing container and sprays hypochlorous acid water toward the rotation center O of the exhaust fan 4 for the processing container.

[0109] With the above configuration, the exhaust fan 4 for the processing container can be used to mix the hypochlorous acid water sprayed from the spray nozzle 614 with the air discharged from inside the processing container 2. Therefore, the air inside the duct 142 can be efficiently deodorized.

[0110] Furthermore, the rotation of the blades 4b of the exhaust fan 4 for the processing container generates a swirling flow, and by spraying hypochlorous acid water directly into the region where turbulence is also occurring, the mixing of the air discharged from inside the processing container 2 with the atomized or evaporated hypochlorous acid water is promoted, thereby enhancing the deodorizing effect.

[0111] The ventilation system 101 of the first embodiment described above includes a water tank 7 in which a sprinkler pump 5 is located and which stores treated water discharged from the water receiving section 21, and a screen device 8 that separates impurities from the treated water and removes them to the outside.

[0112] With the above configuration, the treated water can be circulated and reused. In addition, the screen device 8 can separate impurities from the treated water and remove them to the outside. This allows the dust capture capacity of the treated water to be maintained at an appropriate level.

[0113] The ventilation system 102 of the second embodiment described above includes a sprinkler pump 5 and a stationary water storage tank 700 that stores treated water discharged from the water receiving section 21 to the outside of the treatment container 2. The stationary water storage tank 700 is installed above ground level G.

[0114] According to the above configuration, the ventilation system 102 can be constructed at low cost without the need to excavate the ground for the installation of the water storage tank. In addition, the pre-manufactured, stationary water storage tank 700 can be easily transported to the site and installed.

[0115] The embodiments disclosed herein are illustrative in all respects and are not intended to be restrictive. The technical scope of the present invention is not construed solely by the embodiments described above, but is defined by the claims. Furthermore, the technical scope of the present invention includes all modifications within the meaning and scope of equivalence to the claims.

[0116] For example, in this embodiment, the treatment area S1 is installed outside the air treatment area S2, but this is not limited to this. For example, the treatment area S1 may be installed inside the air treatment area S2. Alternatively, the air purification device 100 can be installed directly inside the air treatment area S2.

[0117] In the first and second embodiments described above, examples were shown in which the ventilation systems 101 and 102 are applied to a chicken coop. However, the present invention is not limited to this and can be applied to various livestock houses for raising various kinds of livestock such as cattle and pigs, as well as to compost houses for producing compost.

[0118] Furthermore, since the ventilation systems 101 and 102 in the first and second embodiments described above were retrofitted to the existing livestock barn 90, a livestock barn-side exhaust fan 91 was provided on the second side wall 90b on the end side of the boundary between the processing section S1 of the ventilation systems 101 and 102 and the air treatment target space S2. The present invention is not limited to this, and it is not necessary to provide a side wall or a livestock barn-side exhaust fan between the main section of the ventilation system and the space inside the livestock barn. In other words, the processing container, exhaust fan for the processing container, deodorizing and purifying section in the duct, etc., may be placed directly inside the space inside the livestock barn.

[0119] Furthermore, although the ventilation system 1 of the first embodiment described above shows an example in which 18 processing containers 2 are provided, the present invention is not limited to this, and it is sufficient to provide at least one processing container. Similarly, it is sufficient to provide at least one water spray nozzle section inside the processing container and at least one exhaust fan for the processing container provided at the upper end opening of the processing container.

[0120] The present invention is applicable to an air purification device that removes dust contained in the air inside a building, and a ventilation system equipped therewith.

[0121] 100 Air purification device 100A Air purification device 101 Ventilation system 102 Ventilation system 101b Control device 2 Processing container 21 Water receiving section 22 Side wall opening 23 Upper end opening 3 Spray nozzle section 4 Exhaust fan for processing container 4b Blade section 5 Spray pump 7 Water storage tank 700 Stationary water storage tank 8 Screen device 141 Duct 1411 Deodorizing and purification section 1412 Air supply passage 142 Duct 1421 Deodorizing and purification section 1422 Air supply passage 61 Deodorizer spraying device 614 Spray nozzle 90 Livestock barn (building) O Center of rotation

Claims

1. An air purification device for removing dust contained in the air inside a building, comprising: a processing container having a water receiving section at the bottom, a side wall opening above the water receiving section, and an upper end opening above the side wall opening; a water spraying nozzle section provided inside the processing container at a height between the side wall opening and the upper end opening; an exhaust fan for the processing container provided above the water spraying nozzle section and generating an airflow to take in air from the side wall opening and exhaust it from the upper end opening; and a water spraying pump that sprays treatment water downward from the water spraying nozzle section toward the water receiving section.

2. The air purification device according to claim 1, comprising a processing compartment that houses one or more of the processing containers, wherein air from inside the building is taken into the processing compartment.

3. The air purification device according to claim 1, further comprising a plurality of water storage tanks for storing treated water discharged from the water receiving section to the outside of the treatment container, wherein the plurality of water storage tanks include: a water storage tank for discharging impurities into which treated water containing impurities discharged from the treatment container flows, and which is equipped with an impurities discharge device for separating impurities contained in the treated water from the treated water and removing them to the outside; and a water storage tank for supplying treated water into which treated water from which impurities have been separated in the water storage tank for discharging impurities flows, and which supplies treated water to the sprinkling nozzle section by the sprinkling pump.

4. The air purification device according to claim 3, comprising a plurality of processing containers, wherein the treated water containing impurities discharged from the plurality of processing containers is subjected to impurity separation in a common impurity discharge reservoir, and the treated water is supplied from a common treated water supply reservoir to the sprinkling nozzles provided in the plurality of processing containers.

5. A ventilation system comprising: an air purification device according to any one of claims 1 to 4; and a duct connected to the upper end opening, wherein the duct is provided with an air supply passage for returning air discharged from the inside of the processing container back into the inside of the building; and configured to circulate air between the inside of the building and the processing container while removing dust.

6. The ventilation system according to claim 5, comprising a control device for controlling the drive of the exhaust fan for the processing container, wherein the control device is configured to adjust the flow rate of air circulating between the interior of the building and the processing container by controlling the exhaust fan for the processing container.

7. The ventilation system according to claim 5, wherein the duct comprises a deodorizing and purifying unit, the deodorizing and purifying unit having a spray nozzle for spraying a liquid deodorizer into the air discharged from the processing container, and an exhaust port for discharging the deodorized and purified air to the outside.

8. The ventilation system according to claim 7, wherein the duct is equipped with a damper that separates the deodorizing and purifying section from the air supply passage, the exhaust port is located downstream of the deodorizing and purifying section, and the damper is configured to adjust the amount of air discharged from the exhaust port and to switch between discharging and stopping the air from the exhaust port.

9. The ventilation system according to claim 7, wherein a plurality of processing containers are provided, the upper opening of each processing container communicates with the internal space of a common deodorizing and purifying unit, and the bottom of the deodorizing and purifying unit is connected to the side of each processing container.

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