JPS63238353A - Livestock barn provided with ventilation system - Google Patents

Abstract

PURPOSE:To make it possible to ventilate thoroughly a livestock barn from corner to corner and discharge gas efficiently by providing a discharge port section in a roof and opening a ventilation hole in the lower section of a partition wall and forcibly sending air into the room through the ventilation hole from the upper section of an air passage by means of forced suction means and discharging the gas from the discharge port section for the ventilation of the livestock barn. CONSTITUTION:When forced ventilation means 9 at a suction section 1 is driven and the outdoor air is introduced from a suction section 1 to an air passage 5, the air is sent into a room through a ventilation hole 6 from the lower section of partition walls 3 and 4 which constitute the air passage 5. This air flows to the outer wall 7 and passes through the space formed by the inner side of the outer wall 7 and the lower side of a roof and is discharged from a discharge port section 2. And, part of the air is also discharged from the open hole 8 in the side wall at the lower section of the outer wall 7. The air that was sent from the air passage 5 flows to the opposite side from the central side of the room from the lower section and is discharged from the side wall opening 8 of the outer wall 7 or an open port section 2 for discharge of the room so that the ventilation is carried out in the whole section of the room and heavier gases such as hydrogen sulfide, etc., are efficiently discharged.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a livestock barn equipped with a ventilation system that has a passageway in the central longitudinal direction and blows air from above the passageway.

[Conventional technology]

Livestock sheds for raising pigs, etc., emit ammonia, methane, etc. from manure.
Gases such as hydrogen sulfide are generated, polluting the air and increasing humidity. As a result, the sanitary environment is poor and infectious diseases are more likely to occur. A ventilation system for livestock barns that improves this environment is extremely important for pig farming.

Therefore, conventionally, as a ventilation method for livestock barns, a ventilation method has generally been adopted in which air is introduced through the side wall and exhausted through the center of the roof or the opposite side wall.

[Problem that the invention seeks to solve]

However, in the conventional ventilation system as described above, air is simply introduced from the side wall and exhausted from the center of the roof or the opposite side wall, which results in uneven ventilation, causing air to flow downward in general, especially below near the side wall. The flow is poor and stagnation occurs. If uniform ventilation is not possible in this way, there is a problem in that the air flow is poor, the ventilation becomes ineffective, the air stagnates, the area becomes filled with gas, and the humidity increases.

Furthermore, gases such as hydrogen sulfide generated in livestock barns are generally heavier than air and accumulate at the bottom, so ventilation from the center of the roof is not possible unless the ventilation capacity is considerably increased. However, increasing the ventilation capacity causes problems such as wasteful ventilation, higher running costs, and environmental deterioration due to debris.

The present invention is intended to solve the above-mentioned problems, and an object of the present invention is to provide a livestock barn equipped with a ventilation system that can ventilate every corner of the livestock barn and efficiently eliminate gas.

[Means for solving problems]

To this end, a livestock barn equipped with the ventilation system of the present invention includes partition walls installed on both sides of a central longitudinal aisle and extending to the roof, forced air intake means installed on the roof above the aisle,
and an exhaust opening provided in the roof above the indoor side, and by providing a ventilation hole below the partition wall, air is sent into the room from the upper part of the passage through the ventilation hole by forced intake means, and the air is exhausted from the exhaust opening. It is characterized by being configured to ventilate through the air, and further includes a middle ceiling board installed between the partition walls and a gas venting pit installed under the floor, and a partition located above the middle ceiling board. By providing ventilation holes in the walls, air is sent into the room from the top of the passage through the ventilation holes using forced intake means.
The device is characterized in that it is configured to perform ventilation by exhausting air through an exhaust opening and a gas venting pit.

[Effect]

In a livestock barn equipped with a ventilation system according to the invention, when the forced air intake means is operated, air is pumped into the room from the central longitudinal passage through the ventilation holes in the partition wall. This air flows towards the outer sidewalls and is exhausted through exhaust openings and venting pits.

By installing an air supply damper inside the ventilation hole and making it possible to change the direction of air flow, it is possible to perform ventilation according to the amount of ventilation required depending on the season, such as summer or winter. . Furthermore, gas can be effectively exhausted by exhausting from the gas venting pit.

〔Example〕

Examples will be described below with reference to the drawings.

FIG. 1 is a diagram showing an embodiment of the structure of a livestock barn equipped with a ventilation system according to the present invention, and FIG. 2 is a cross-sectional view of the livestock barn. In the figure, l is the intake part, 2 is the exhaust opening, 3 and 4 are the partition walls,
5 is a passage, 6 is a ventilation hole, 7 is an outer wall, and 8 is a side wall opening.

As shown in FIG. 1, a livestock barn equipped with a ventilation system according to the present invention is provided with a plurality of intake sections 1 along the center line of the roof, and exhaust openings 2 on both sides thereof. The intake section 1 has a forced ventilation means 9 such as a fan, and forcibly takes in air. Below the central line where the intake section 1 is located and between it and the exhaust opening 2, a partition wall 3.4 extending to the roof is provided to form a partitioned passage 5. Therefore, the livestock barn is divided into two by this passage 5, and each of the two divided rooms is located below the exhaust opening 2. A ventilation hole 6 is provided below the partition wall 3.4, and a side wall opening 8 is provided below the outer wall 7. Further, a sensor 1o is installed in the room to detect the concentration of gas.

With the structure of the livestock barn as described above, when the forced ventilation means 9 of the intake section 1 is operated and outside air is introduced from the intake section 1 into the passage 5, the ventilation hole 6 is opened from below the partition wall 3.4 constituting the passage 5. Air is pumped into the room through. This air flows towards the outer wall 7 as indicated by the arrows in FIGS. 1 and 2 and is exhausted through the exhaust opening 2 through the space inside the outer wall 7 and under the roof. A part of the air is also exhausted from the side wall opening 8 below the outer wall 7. Passage 5 like this
The air sent from the room flows from the lower center side of the room to the opposite side and is exhausted from the side wall opening 8 on the outer wall 7 side or from the exhaust opening 2 on the roof, so ventilation is performed throughout the room, and hydrogen sulfide is removed. Even heavy gases such as gases are efficiently exhausted.

FIG. 3 is a diagram showing an example of the block configuration of a circuit that controls the operation of the forced ventilation means, and FIG. 4 is a diagram showing an example of the block configuration of the circuit that controls the opening and closing of the ventilation holes.

The forced ventilation means is controlled to operate periodically for a fixed period of time depending on the environmental conditions such as the season, and the block configuration of the forced ventilation means is controlled to operate for a certain period of time. The timer 12 is used to set the time for one drive, and the operation control device 14 controls the driver 15 for the set time of the timer 12 every time the timer 11 is set. The driver 15 operates/stops the fan 16 based on a control signal from the operation control device 14. Further, the sensor 13 detects and measures environmental conditions such as temperature, humidity, gas concentration, etc. In the operation control device 14, this sensor 13
When it is determined from the signal that the environmental condition has become particularly bad, the driver 15 is controlled independently of the setting of the timer 11, and the fan 16 is operated for a certain period of time set by the timer 12 or until the environmental condition improves. This environmental state is determined by, for example, setting and storing a reference value in the operation control device 14 and comparing this reference value with the signal from the sensor 13.

The side wall opening 8 of the outer wall 7 shown in FIG. 2 is located below and is effective for exhausting heavy gases such as hydrogen sulfide, but the amount of exhaust gas from the exhaust opening 2 is small due to the amount of gas exhausted from here. This reduces air flow throughout the room. Therefore, the side wall opening 8 has a structure that can be opened and closed, and by keeping it closed when the gas concentration is not high, the amount of air circulation in the room can be increased. This increases gas exhaust efficiency. FIG. 4 shows a block diagram of a circuit that controls the opening and closing of the side wall opening 8. In FIG. When the 0 judgment processing section 19, which is used to set a reference value for determining whether to open or close the sensor 17.18, reads the signal from the sensor 17. If the value exceeds the value, the driver 21 is controlled. The driver 21 opens and closes the side wall opening 8 by driving an opening/closing drive mechanism M such as a remoter or a magnet based on a control signal from the determination processing section 14 .

Fig. 5 is a diagram showing another embodiment of a livestock barn equipped with a ventilation system according to the present invention C, and Fig. 6 is a diagram showing an example of the structure of a supply air damper. ceiling valve,
33 is an opening, 34 is an air supply damper 1, and 35 is a gas vent pit.

In FIG. 5, the middle ceiling plate 31 is provided above the passage 5. As shown in FIG. The opening 33 is provided above the middle ceiling plate 31 of the partition wall 3 and takes in outside air introduced into the passage from the air intake section 1 into the room. The air supply damper 34 is
It is provided inside the opening 33 and controls the direction of the outside air taken in from the passage 5 side to either direction shown in FIG. The ceiling opening/closing valve 32 opens and closes the exhaust opening 2, and when the outside air taken in is controlled downward by the supply air damper 34 as shown in FIG. 5(8), the ceiling opening/closing valve 32 is opened. If the outside air taken in is to be controlled upward by the supply air damper 34 as shown in FIG. Make it.

In a livestock barn equipped with the ventilation system shown in Figure 5, in summer when a large amount of ventilation is required, the ceiling valve 32 is opened as shown in fat in the figure, and the air supply damper 34 is directed downward to recirculate the air. , exhaust from the exhaust opening 2 and the gas venting pit 35. In addition, in the winter when the amount of ventilation is low, as shown in Figure Fb), the ceiling valve 32 is closed, the supply air damper 34 is turned upward to circulate the air, and the gas vent pit 3 is closed.
Exhaust only from 5. Particularly in the winter season, by sending cold air upwards, that is, toward the roof, warm air from the roof is ventilated toward the gas vent below and the vent 35, which improves ventilation efficiency. In this way, when changing the direction of the air supply damper 34 depending on the season, it may be done manually because the change is infrequent.

The supply air damper consists of an upper plate and a lower plate, for example, as shown in Figure 6 (al).The upper plate can be opened and closed using a fixed arm as a fulcrum using the vicinity of the right end, and the lower plate can be opened and closed using the fulcrum near the left end. With this supply air damper, by placing the upper plate at position B' and the lower plate at position A', the damper becomes summer-type downward as shown in fc) in the same figure, and the upper plate is placed at position A'. B. By placing the lower plate in position A, it will be facing upward in the winter style as shown in the same figure (bl).

Note that the present invention is not limited to the above embodiments, and various modifications are possible. For example, in the above embodiment, the forced ventilation means is controlled to operate at regular intervals, but it may also be operated at set times depending on the day, night, season, etc. The judgment was made by comparing the sensor signal level with a reference value, but if the sensor itself judges the detection level and outputs a predetermined signal when the environment deteriorates, the comparison Of course, the judgment process becomes unnecessary.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, a partition wall is provided that extends to the roof across the center longitudinal passage and has a ventilation hole below, so that air is forced into the room from below on the side of the central passage. This allows air to escape through the side walls, under the roof, and into the exhaust opening. Therefore, the radiant heat from the side walls and roof can be effectively released, suppressing the rise in temperature in the room, and efficiently removing moisture. Also, between the sidewalls and below the sidewalls.

By providing an opening or a gas venting pit,
Gases heavier than air, which cannot be removed through the roof exhaust opening, can be effectively removed. Furthermore, in winter, efficient ventilation can be achieved by sending cold air toward the roof and exhausting warm air from the roof through the gas vent pit below.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the configuration of an embodiment of a livestock barn equipped with a ventilation system according to the present invention, FIG. 2 is a cross-sectional view of the livestock barn, and FIG. 3 is an example of a block configuration of a circuit that controls the operation of forced ventilation means. FIG. 4 is a diagram showing an example of a block configuration of a circuit for controlling the opening and closing of ventilation holes, FIG. 5 is a diagram showing another embodiment of a livestock barn equipped with a ventilation system according to the present invention, and FIG. FIG. 2 is a diagram showing a structural example of an air supply damper. DESCRIPTION OF SYMBOLS 1... Intake part, 2... Exhaust opening, 3 and 4... Partition wall, 5... Passage, 6... Ventilation hole, 7... External wall, 8... Side wall opening, 31... Middle ceiling board, 32...
Ceiling opening/closing valve, 33...opening, 34...air supply damper, 35...gas vent pit. Applicant Shimizu Corporation (1 other person) Agent Patent attorney Ryukichi Abe (2 others) Figure 3 Figure 5 (b) Figure 6

Claims (5)

[Claims] (1) Partition walls installed on both sides of the central longitudinal passageway and extending to the roof, forced air intake means installed on the roof above the passageway, and exhaust openings installed on the roof above the indoor side; The ventilation system is characterized in that a ventilation hole is provided below the wall, and air is sent into the room from the upper part of the passageway through the ventilation hole using forced intake means, and the air is exhausted through the exhaust opening for ventilation. A livestock shed. (2) A livestock barn equipped with a ventilation system according to claim 1, characterized in that an openable and closable exhaust port is provided below the side wall. (3) Partition walls installed on both sides of the central longitudinal passage and extending to the roof, a middle ceiling board installed between the partition walls, forced air intake means installed on the roof above the passage, and a roof above the indoor side. By providing ventilation holes in the partition wall above the mid-ceiling panel, air is drawn into the room from the upper part of the passageway through the ventilation holes using forced intake means. What is claimed is: 1. A livestock barn equipped with a ventilation system, characterized in that the livestock barn is configured to send in gas and exhaust the gas through an exhaust opening and a gas venting pit for ventilation. (4) A livestock barn equipped with a ventilation system according to claim 3, further comprising an air supply damper that switches the direction of air sent into the ventilation hole between upward and downward. (5) A livestock barn equipped with the ventilation system according to claim 3, characterized in that an on-off valve is provided to open and close the exhaust opening.