CN108882693B - Method for ventilating chicken coop - Google Patents
Method for ventilating chicken coop Download PDFInfo
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- CN108882693B CN108882693B CN201680084087.2A CN201680084087A CN108882693B CN 108882693 B CN108882693 B CN 108882693B CN 201680084087 A CN201680084087 A CN 201680084087A CN 108882693 B CN108882693 B CN 108882693B
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- side wall
- air
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- adjusting device
- intake
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; CARE OF BIRDS, FISHES, INSECTS; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K1/00—Housing animals; Equipment therefor
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; CARE OF BIRDS, FISHES, INSECTS; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K1/00—Housing animals; Equipment therefor
- A01K1/0047—Air-conditioning, e.g. ventilation, of animal housings
- A01K1/0052—Arrangement of fans or blowers
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; CARE OF BIRDS, FISHES, INSECTS; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K1/00—Housing animals; Equipment therefor
- A01K1/0047—Air-conditioning, e.g. ventilation, of animal housings
- A01K1/0064—Construction of air inlets or outlets in walls
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; CARE OF BIRDS, FISHES, INSECTS; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K31/00—Housing birds
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; CARE OF BIRDS, FISHES, INSECTS; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K31/00—Housing birds
- A01K31/18—Chicken coops or houses for baby chicks; Brooders including auxiliary features, e.g. feeding, watering, demanuring, heating, ventilation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/0001—Control or safety arrangements for ventilation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
Abstract
The inside of the chicken coop (1) is made negative by forcibly exhausting air from an exhaust port (11b) provided in a wall (11) orthogonal to the cage row (90) by an exhaust fan (11f), air is taken in from a side wall air inlet (20) provided in the upper part of the side wall (10), and the temperature difference in the vertical direction of the stacked cages and the temperature difference in the flow path from the upstream to the downstream of the flow of the air in the chicken coop are reduced by controlling an air intake adjusting device based on both the difference in static pressure between the internal space and the external space detected by a differential pressure gauge (40) and the temperatures detected at a plurality of locations in the internal space and controlling the opening and closing of the side wall air inlet based on a rotating plate (31).
Description
Technical Field
The invention relates to a method for ventilating chicken houses.
Background
In a chicken raising facility for raising a plurality of chickens, a large chicken house is used which accommodates a plurality of cage rows in which cages are continuously provided in one direction. The present applicant has hitherto proposed and implemented a structure and a ventilation method in which such a large chicken house is formed into a windowless structure, and ventilation for ventilating the large chicken house in a direction in which a cage row extends is referred to as "tunnel ventilation" (see, for example, patent documents 1 and 2). The ventilation structure in these documents includes, as basic structures: an air inlet provided on one of a pair of walls (end surfaces) orthogonal to the cage row; an exhaust port provided in the other wall; an elongated auxiliary air inlet provided between the roof and the upper portion of each of a pair of side walls parallel to the cage rows; and an intake air adjusting device for opening and closing the auxiliary intake port.
Then, the inside of the chicken house is made negative by forcibly exhausting air by a fan attached to the exhaust port, and air is taken into the chicken house from the outside through the intake port or the auxiliary intake port to be ventilated. The air taken in circulates in the chicken's nest and is discharged from the exhaust port, but is heated by the body temperature of the chicken in the process. Therefore, without taking any countermeasure, the temperature is higher the more downstream of the flow of the air. The difference in temperature environment depending on the position of the cage is undesirable because the chickens to be raised grow and the amount of eggs produced varies.
Therefore, in the techniques of patent documents 1 and 2, the intake air adjusting device is controlled based on temperatures measured at a plurality of locations in the chicken house, and the amount of intake air from the auxiliary intake port is adjusted. This reduces the temperature difference in the flow path from the upstream to the downstream of the air flow in the chicken house.
However, in one cage row, a plurality of cages are also stacked in the up-down direction, having a height of several meters. And, warm air rises naturally. Therefore, in the techniques of patent documents 1 and 2, even if the temperature difference in the flow path from the upstream to the downstream of the air flow in the chicken house can be reduced, a large temperature difference may occur in the vertical direction. For example, in the case of stacking 5 to 6 cages, in winter when the temperature of the taken-in outside air is low, a temperature difference of 5 to 8 ℃ may occur between the uppermost cage and the lowermost cage.
Prior art documents
Patent document
Patent document 2 Japanese patent No. 3598212
Disclosure of Invention
Problems to be solved by the invention
In view of the above circumstances, an object of the present invention is to provide a method of ventilating a chicken house, which can reduce a temperature difference in a flow path from upstream to downstream of the flow of air in the chicken house and can reduce the temperature difference also in the vertical direction in which a cage is stacked.
Means for solving the problems
In order to solve the above-mentioned problems, the present invention is a method of ventilating chicken houses (hereinafter, may be simply referred to as "ventilation method"),
"the chicken house has:
an exhaust port provided in one of walls orthogonal to a cage row in which cages are continuously provided in one direction;
an exhaust fan mounted on the exhaust port;
a side wall air inlet formed in an upper portion of at least one of side walls parallel to the cage row; and
an air inlet adjusting device for opening and closing the side wall air inlet,
it is characterized in that the preparation method is characterized in that,
the exhaust fan is operated to exhaust air from the exhaust port, so that the internal space is at a negative pressure, and air is taken in from the external space through the side wall air inlet,
detecting a difference between a static pressure in the internal space and a static pressure in the external space, and controlling opening and closing of the side wall intake port by the intake air adjusting device so that the detected difference between the static pressures falls within a predetermined range,
the temperature is detected at a plurality of locations in the internal space, and the opening and closing and the degree of opening of the side wall intake port by the intake air adjusting device are controlled so that the detected temperature falls within a predetermined range. "
As the "side wall air inlet formed at the upper portion of the side wall", a side wall air inlet formed by providing a gap between the upper end of the side wall and the roof can be exemplified, and in the case of a chicken house having a ceiling, a side wall air inlet formed by providing a gap between the upper end of the side wall and the ceiling can be exemplified. The side wall intake port is formed in "at least one of the side walls parallel to the cage row", and may be formed in both of the pair of side walls or in only one of the pair of side walls. In the case of having a plurality of cage rows, it is desirable to form the cage rows on both of the pair of side walls.
As the "air intake adjusting device", there may be exemplified a structure having a door member that opens and closes the side wall intake port only from one side or both directions by rotation, and a structure having a door member that opens and closes the side wall intake port by sliding.
In this configuration, the difference between the static pressure in the internal space and the static pressure in the external space of the chicken house (hereinafter, sometimes referred to as "pressure difference between the inside and the outside") is adjusted to be within a predetermined range by opening and closing the side wall intake ports and the opening degree. This makes it possible to adapt the speed of the air flowing in through the side wall air inlet and the distance the air flowing in reaches at a certain speed or more to the conditions of the chicken house, such as the size of the internal space, the number of cage rows, and the height of the cages. This makes it possible to form a state in which the air in the internal space is entirely stirred by the air flowing in through the side wall air inlet.
In addition, the temperature is detected at a plurality of locations in the internal space, and the opening/closing and the degree of opening of the side wall intake port are adjusted so that the detected temperature falls within a predetermined range. Therefore, the temperature difference in the flow path from the upstream to the downstream of the air flow in the chicken house can be reduced by the control based on the detection of the temperature, and the temperature difference can be reduced in the vertical direction in which the cages are stacked by the stirring action of the air based on the adjustment of the pressure difference between the inside and the outside.
The ventilation method of the present invention in the above-described configuration,
it is possible to form "the control of the intake air adjusting device based on the detected difference in static pressure is performed prior to the control of the intake air adjusting device based on the detected temperature".
In the present invention, the opening and closing and the opening of the side wall intake port are controlled based on the detection of the pressure difference between the inside and the outside, and the opening and the closing and the opening of the side wall intake port are also controlled based on the detection of the temperature. Therefore, at the time of starting the control, the control based on the detection of any one of the pressure difference and the temperature is performed first, but in the present configuration, the control based on the detection of the pressure difference is performed first. That is, the air in the internal space is stirred and the temperature in the vertical direction is close to a uniform state, and then the control of the intake air adjusting device is performed based on the detection of the temperature.
Thus, the temperature sensors for detecting the temperature for adjusting the opening/closing and the degree of opening of the side wall intake port may be provided at a plurality of locations in the flow path of the air from the side wall intake port to the exhaust port, and it is not necessary to provide a plurality of temperature sensors at a certain location in the vertical direction in the flow path. In contrast, if a plurality of temperature sensors provided in the vertical direction detect different temperatures in a state where the air is not sufficiently stirred and the difference in temperature in the vertical direction is large, it is considered that the control of the intake air adjusting device based on the detected temperatures becomes complicated.
Therefore, according to this configuration, the temperature difference in the flow path from the upstream to the downstream of the flow of the air in the chicken house can be reduced by simple control based on a simple configuration, and the temperature difference can be reduced also in the vertical direction in which the cages are stacked.
The ventilation method of the present invention in addition to the above-described structure,
it is also possible to form "the side wall air inlet is divided into a plurality of parts in the longitudinal direction in which the cage row extends,
the intake air adjusting device is constituted by a plurality of units for adjusting opening/closing and opening degrees of the divided side wall intake ports.
In the present configuration, the side wall intake port is divided into a plurality of side wall intake ports in the longitudinal direction substantially along the direction of the flow of air in the chicken house, and the opening degree of the side wall intake port can be changed depending on whether the side wall intake port is opened or closed or opened. Thus, for example, the amount of air flowing into the side wall intake port can be adjusted to be increased as the temperature of the chicken is increased downstream in the air flow. Therefore, control for reducing the temperature difference in the flow path from the upstream to the downstream of the air flow in the chicken house can be easily performed.
Further, it is desirable that the entire length of the side wall intake port is made equal to the entire length of the cage row and the positions of both end portions of the side wall intake port and the cage row are aligned, so that all the spaces around the chickens can be reliably ventilated by the fresh air flowing in from the side wall intake port.
ADVANTAGEOUS EFFECTS OF INVENTION
As described above, as an effect of the present invention, it is possible to provide a method of ventilating a chicken house capable of reducing a temperature difference in a flow path from an upstream side to a downstream side of a flow of air in the chicken house and also capable of reducing a temperature difference in an up-down direction in which a cage is stacked.
Drawings
Fig. 1 is a schematic diagram of a chicken house to which a ventilation method according to an embodiment of the present invention is applied.
Fig. 2 is a schematic view of the chicken house of fig. 1.
Fig. 3 is an X-X sectional view of fig. 2 (illustration of the exhaust fan is omitted).
Fig. 4 is an enlarged view of a range a of fig. 3.
Detailed Description
Hereinafter, a ventilation method and a chicken house 1 using the ventilation method according to an embodiment of the present invention will be described with reference to fig. 1 to 4.
First, the structure of the chicken house 1 will be explained. The chicken house 1 is a substantially rectangular parallelepiped building surrounded by four walls, and houses a cage row 90 in which cages are continuously provided in one direction in an internal space thereof. The chicken house 1 comprises: an exhaust port 11b provided in one wall 11 of the walls 11 and 12 orthogonal to the cage 90; an exhaust fan 11f installed at the exhaust port 11 b; an intake port 12b provided in a wall 12 facing the wall 11 in which the exhaust port 11b is provided; a sidewall air inlet 20 formed in an upper portion of each of the pair of sidewalls 10 parallel to the cage 90; and an intake air adjusting device 30 for opening and closing the side wall intake port 20.
Specifically, the chicken house 1 is a gable roof structure having a length in a direction parallel to a beam 80 intersecting a roof 81 of several tens meters to one hundred and several tens meters, and a length in a direction orthogonal to the beam 80 (hereinafter, referred to as "width direction") of several meters to about 40 meters, and is in an elongated shape having a length in a direction orthogonal to the beam 80 shorter than a length in a direction parallel to the beam 80. In the present embodiment, a plurality of cage rows 90 (three rows are illustrated in fig. 2 and 3) are illustrated, and a single row may be employed. The extending length direction of the cage rows 90 is the extending direction of the house beam 80. That is, the walls 11 and 12 provided with the exhaust port 11b and the intake port 12b are a pair of end surfaces. The exhaust port 11b and the intake port 12b are each provided with a large area equal to or larger than 1/2 of the area of the entire wall. The intake port 12b is covered with a cooling pad 12p made of highly water-absorbent paper or nonwoven fabric. On the other hand, a plurality of large exhaust fans 11f are vertically and horizontally mounted on the exhaust port 11 b.
The sidewall air inlet 20 is formed by providing a gap between the upper end of the sidewall 10 and the roof 81 on each of the pair of sidewalls 10. More specifically, the space on the roof rear surface is partitioned by a partition plate 82 that hangs down from the roof 81 along the side wall 10 at a position inside the side wall 10, and the side wall air inlet 20 is opened between the lower end edge of the partition plate 82 and the upper end edge of the side wall 10.
The entire length of the sidewall intake port 20 is the same as the length of the cage row 90, and the positions of both ends thereof are provided so as to correspond to both ends of the cage row 90, and are divided into a plurality of portions in the longitudinal direction. The intake air adjusting device 30 is constituted by a plurality of units that adjust the opening and closing of the side wall intake port 20 for each of the divided side wall intake ports. Fig. 1 and 2 illustrate a case where the sidewall intake port 20 is divided into three. Hereinafter, the sidewall intake port 20 closest to the intake port 12b, the sidewall intake port 20 closest to the center, and the sidewall intake port 20 closest to the exhaust port 12b are referred to as "sidewall intake ports 20 a", "sidewall intake ports 20 b", and "sidewall intake ports 20 c", respectively, and collectively referred to as "sidewall intake ports 20" without any particular distinction.
The state in which the entire length of the side wall intake port 20 is "the same as the entire length of the cage row 90 and the positions of the both end portions are" provided in correspondence with the both end portions of the cage row 90 "is limited to a state in which the entire lengths of the both end portions are completely the same and the positions of the both end portions are completely matched. Here, when the centers of the side wall intake ports 20 and the cage rows 90 in the longitudinal direction are aligned, the longer overall length is defined as including "within a range of + 10% of the shorter overall length".
The intake air adjustment device 30 has the same structure with the following units: a plurality of rotating plates 31 which are flat and can be opened from one side, and which are rotatable about a horizontal axis; and a rotating plate driving mechanism for rotating the plurality of rotating plates 31 at the same time by the same angle. The intake air adjusting device 30 has a unit in which a plurality of rotating plates 31 are rotated, and the plurality of rotating plates 31 are disposed adjacent to the vicinity of the upper end of the side wall 10, and have the same length as one of the divided side wall intake ports 20a, 20b, and 20 c.
The pivotal plate drive mechanism includes a hoist (both not shown) driven by a motor, a main wire rope 32, and a plurality of sub wire ropes 33. The main wire rope 32 is wound around the hoist at one end and fixed at the other end to a bracket (not shown) protruding from the side wall 10 via a spring so as to extend along the side wall 10. One end of each of the plurality of sub-wire ropes 33 is attached to the vicinity of the free end of each of the plurality of turning plates 31 belonging to the same unit of the intake air adjustment device 30, and the other end is connected to the main wire rope 32. The respective sub-cables 33 are turned around the first pulleys 34 and the second pulleys 35 attached to the support plates 39 protruding from the side walls 10 for each of the turning plates 31, and the turning plate 31 that tries to turn downward due to its own weight is pulled obliquely upward.
With the rotating plate drive mechanism of this configuration, the opening and closing and the degree of opening of the rotating plate 31 can be adjusted for each of the divided side wall intake ports 20. Specifically, when the main wire rope 32 is wound by the winding machine by driving the motor, the rotating plate 31 is pulled by the sub wire rope 33 connected to the main wire rope 32 and rotates upward, and the opening degree of the side wall intake port 20 decreases. On the other hand, when the main wire rope 32 is released by the hoist, the sub wire rope 33 is loosened, the rotating plate 31 rotates downward by its own weight, and the opening degree of the side wall intake port 20 increases. In fig. 1, for the sake of clarity and simplification, a plurality of rotating plates 31 for adjusting the opening and closing and the opening of the divided one side wall intake port 20 by simultaneously rotating the same angle are illustrated as one rotating plate 31.
In addition to the above-described structure, the chicken house 1 is provided with a plurality of temperature sensors 50 for measuring the temperature of the internal space. The temperature sensor 50 has at least the number of the divided sidewall air inlets 20, and is attached in the vicinity of each of the divided sidewall air inlets 20. The chicken house 1 is provided with a differential pressure gauge 40 for detecting a difference between the static pressure in the internal space and the static pressure in the external space. The differential pressure gauge 40 is provided in the internal space of the chicken nest 1, the low-pressure side pipe 41 is disposed in the internal space, and the high-pressure side pipe 42 is led out to the external space.
Next, a method of ventilating the chicken house 1 having the above-described structure will be described. The ventilation method is a method of taking in air from the external space through at least one of the sidewall intake port 20 and the intake port 12b by operating the exhaust fan 11f to discharge air from the exhaust port 11b to make the internal space negative pressure. In addition, the ventilation method switches, based on the temperature of the external space, to any one of a first mode in which air is taken in from the external space only through the side wall intake port 20, a second mode in which air is taken in from the external space only through the intake port 12b, and a third mode in which air is taken in from the external space through both the side wall intake port 20 and the intake port 12 b.
In the first mode and the third mode in which air is taken in from the external space through the side wall air inlet port 20, the difference between the static pressure of the internal space and the static pressure of the external space is detected, the opening and closing and the opening of the side wall air inlet port 20 by the air intake adjusting device 30 are controlled so that the difference between the detected static pressures falls within a predetermined range, the temperatures are detected at a plurality of locations in the internal space, and the opening and closing and the opening of the side wall air inlet port 20 by the air intake adjusting device 30 are controlled so that the detected temperatures fall within a predetermined range.
For example, when the outside air temperature is high in summer or the like, air is taken in from the intake port 12b (second mode). This allows air to flow at a high speed between the opposing walls 11 and 12, and allows ventilation with outside air having a lower temperature than the temperature inside the chicken nest 1 while cooling the internal space. At this time, by causing water to flow down, drip, and spray onto the cooling mat 12p covering the intake port 12b, the temperature of the air in the cooling mat 12p that has been deprived of the heat of vaporization of the water and has become a low temperature can be lowered, and the internal space can be cooled efficiently.
On the other hand, when the outside air temperature is low in winter or the like, if outside air is taken in from the large-area intake port 12b and flows straight through the chicken nest 1 to the exhaust port 11b, the temperature on the intake port 12b side (upstream side) becomes too low. Therefore, the intake port 12b is closed and the outside air is taken in from the side wall intake port 20 (first mode).
In the first mode, since the direction in which air flows in through the sidewall intake port 20 is different from the direction in which air is discharged through the exhaust port 11b, the air flows at a lower speed than in the second mode. Therefore, there is an advantage that the internal space is not excessively cooled, and on the other hand, stagnation and offset of the air flow are easily generated, and the temperature is easily uneven depending on the position of the flow path from the side wall intake port 20 to the exhaust port 11b and the position in the vertical direction.
Therefore, in the present embodiment, the pressure difference between the inside and outside of the chicken house 1 is measured by the pressure difference meter 40, and the opening and closing and the opening degree of the side wall intake port 20 are adjusted by controlling the intake air adjusting device 30 so that the difference falls within a predetermined range.
Here, the "predetermined range" of the difference in static pressure is determined experimentally in advance for each chicken house 1 as a condition under which the stirring action by the air flowing in from the side wall air inlet 20 can be obtained. For example, when the distance between the side walls 10 is large (in other words, the length of the chicken house 1 in the width direction is large) and a plurality of cage rows 90 are provided, the air flowing in from the side wall air inlet 20 needs to reach the cage row 90 at the center in the width direction while maintaining a certain wind velocity. In addition, in the case where a plurality of cages are stacked, the air flowing in from the sidewall air inlet 20 needs to reach the lowermost cage while maintaining a certain level of wind speed. Therefore, by examining the relationship between the pressure difference between the inside and the outside, the wind speed of the air flowing in from the side wall air inlet 20, and the arrival distance for each of the chicken nests having different conditions, a range is set in which the pressure difference based on the stirring action of the air flowing in from the side wall air inlet 20 can be sufficiently obtained.
Further, the effect of stirring the air in the internal space is increased as the flow rate of the air flowing in is increased, but if the flow rate is excessively increased, stress is applied to the chickens, which is undesirable for the chickens. Therefore, the range of the pressure difference between the inside and the outside is set so that the stirring action by the air flowing in from the sidewall air inlet 20 becomes "no excess or insufficient".
Then, the intake air adjusting device 30 is controlled to rotate the rotating plate 31 so that the pressure difference between the inside and the outside measured by the differential pressure gauge 40 falls within the range thus set. Even if the operating conditions of the exhaust fan 11f for forcibly discharging air from the internal space to the external space are the same, the difference in pressure between the inside and the outside can be changed by the opening degree of the sidewall air inlet 20. Specifically, when the opening area of the side wall intake port 20 is reduced by rotating the rotating plate 31 in the closing direction, the difference in pressure between the inside and the outside increases, the flow velocity of the air flowing in increases, and the distance that the air reaches while maintaining a certain flow velocity increases. Conversely, when the opening area of the side wall intake port 20 is increased by rotating the rotating plate 31 in the opening direction, the difference in pressure between the inside and the outside is reduced, the flow velocity of the air flowing in from the side wall intake port 20 is reduced, and the distance to be reached while maintaining a certain flow velocity is shortened.
When the operating condition of the exhaust fan 11f changes with a change in the outside air temperature, the pressure difference between the inside and the outside changes with the change, and therefore, when the operating condition deviates from the predetermined range, the intake air adjustment device 30 is controlled to rotate the rotating plate 31 in the same manner as described above. For example, when the number of fans among the plurality of exhaust fans 11f that are operated is reduced as the outside air temperature decreases, the pressure difference between the inside and the outside decreases, and therefore, when the difference is outside a predetermined range, the rotating plate 31 is rotated in the closing direction. On the other hand, when the number of exhaust fans 11f operating in association with the increase in the outside air temperature is increased, the difference in pressure between the inside and the outside is increased, and therefore, when the difference is out of a predetermined range, the rotating plate 31 is rotated in the opening direction.
In addition, in the control for adjusting the pressure difference between the inside and the outside to a predetermined range, the rotating plates 31 belonging to the units of the intake air adjusting device 30 that open and close the different sidewall intake ports 20a, 20b, and 20c are simultaneously rotated by the same angle.
In this way, by adjusting the pressure difference between the inside and the outside to be within a predetermined range, the air in the internal space can be entirely stirred by the air flowing in through the sidewall air inlet 20. Then, after the pressure difference between the inside and the outside is stabilized within a predetermined range and the air in the internal space is in a well-stirred state, the opening/closing and the opening degree of the side wall air inlet 20 are adjusted based on the temperature detection by the temperature sensor 50 so that the temperatures detected at a plurality of locations are within a predetermined range.
The "predetermined range" of the temperature can be determined by the size of the chicken house 1, the length of the air flow in the chicken house 1, the type of chicken (chick or adult chicken), and the like. For example, the size of the allowable range of the temperature can be changed according to the length of the air circulation in the chicken house 1. Alternatively, when raising chickens with low tolerance to temperature changes, such as chicks, the allowable temperature range can be set small.
Since the air circulating in the chicken nest 1 is heated by the body temperature of the chicken, the more downstream the temperature is, the higher the temperature is. Therefore, it is not practical to set the same target value of the temperature without depending on the position of the internal space. Therefore, the case where the target temperature range is "average temperature ± α ℃" is described as an example of the temperature of the entire internal space, and for example, the target value of the temperature detected in the vicinity of the side wall intake port 20a closest to the intake port 12b may be set to "average temperature — α ℃", the target value of the temperature detected in the vicinity of the center side wall intake port 20b may be set to "average temperature", and the target value of the temperature detected in the vicinity of the side wall intake port 20c closest to the exhaust port 11b may be set to "average temperature + α ℃", and the target value may be set higher further downstream.
In many cases, immediately after the temperature adjustment is started, the temperature detected in the vicinity of the side wall intake port 20a is substantially equal to the outside air temperature and is lower than the "average temperature — α ℃" of the target value. Therefore, in order to reduce the amount of intake of the outside air and increase the temperature, the turning plate 31 is turned in the closing direction at the side wall intake port 20 a. On the other hand, the temperature detected in the vicinity of the sidewall air inlet 20c is higher than the "average temperature + α ℃" of the target value at the initial stage of the temperature adjustment. Therefore, in order to increase the intake amount of the outside air and lower the temperature, the turning plate 31 is turned in the opening direction at the side wall intake port 20 c. Since the temperature detected in the vicinity of the side wall intake port 20b is usually close to the average value as the target value, the rotating plate 31 does not substantially rotate at the side wall intake port 20 b.
By taking in the detected temperatures from the temperature sensor 50 at regular time intervals and repeating the above-described control of the rotating plate 31 by the intake air adjusting device 30, the temperatures detected at a plurality of locations gradually approach the target values, respectively, and are stabilized within the set allowable range. Thereafter, control of the intake air adjusting device 30 based on detection of the pressure difference between the inside and the outside and control of the intake air adjusting device 30 based on detection of the temperature are alternately performed at predetermined intervals.
Here, a general-purpose computer including a main storage device, an auxiliary storage device, and a processor can be used for controlling the intake air adjustment device 30. A control program for driving the motor to rotate the rotating plate 31 based on the detection of the differential pressure gauge 40 and the temperature sensor 50 is stored in the main memory, and is processed by the processor according to the control program.
In addition, when the outside air temperature is moderate, such as during the period between summer and winter, both the intake port 12b for taking in the outside air and the side wall intake port 20 are used (third mode). In the first mode and the third mode in which air is taken in through the side wall intake ports 20, one or more side wall intake ports 20 may be closed by the rotating plate 31 without opening all the side wall intake ports 20 divided into a plurality of portions.
As described above, according to the ventilation method of the present embodiment, the opening and closing and the opening of the side wall intake port 20 are adjusted based on the detection of the pressure difference between the inside and the outside, and the air in the internal space is entirely stirred by the air flowing in through the side wall intake port 20. Therefore, by using both the control based on the detection of the temperatures at a plurality of locations in the internal space and the control based on the detection of the pressure difference between the inside and the outside in the opening and closing of the side wall air inlets 20 and the adjustment of the opening degree, the temperature difference in the flow path from the upstream to the downstream of the flow of the air in the chicken house 1 can be reduced, and the temperature difference can also be reduced in the vertical direction in which the cages are stacked.
In the present embodiment, when opening and closing of the side wall intake port 20 and adjustment of the opening degree are started, control based on detection of the pressure difference between the inside and the outside is performed prior to control based on detection of the temperature. Thus, the air forming the internal space is sufficiently stirred and the temperature in the vertical direction is close to a uniform state, and then the control based on the detection of the temperature is performed. Therefore, by simple control with a simple configuration in which the number of temperature sensors 50 is suppressed, the temperature difference from the upstream to the downstream of the flow of air in the chicken nest 1 and the temperature difference in the up-down direction can be reduced.
In the present embodiment, the side wall intake port 20 is divided into a plurality of portions in the longitudinal direction, and the opening and closing and the opening degree thereof can be individually adjusted. This makes it possible to easily perform control such that the temperature of the internal space of the chicken nest 1, which is heated by the body temperature of the chicken and becomes higher as it goes downstream, falls within a predetermined range.
In addition, in the present embodiment, it is possible to perform appropriate ventilation in accordance with the seasonal cycle and the fluctuation of the outside air temperature at all times by switching to any one of the first to third modes in which the intake port of air from the outside space is different.
The present invention has been described above by way of preferred embodiments, but the present invention is not limited to the above-described embodiments, and various improvements and design changes can be made without departing from the scope of the present invention.
For example, although the air intake adjusting device 30 has been described above as an example in which the side wall intake port 20 is opened and closed only from one side by the rotation of the rotating plate 31, the air intake adjusting device is not limited to this as long as the opening and closing and the opening degree of the side wall intake port 20 can be adjusted, and a structure in which the side wall intake port is opened and closed in both directions by the rotation or a structure in which the side wall intake port is opened and closed by sliding in one direction can be employed.
Further, although the case where the side wall intake port 20 is divided into three in the longitudinal direction has been described above, if the number of divisions is set to be larger as the side wall intake port is longer in the longitudinal direction, it is possible to more precisely perform control for bringing the temperature in the chicken nest into a predetermined range.
Further, although the above illustrates the case where the air inlet 12b is covered with the cooling mat 12p, in the chicken coop in a region where the temperature in summer is not so high, the air inlet 12b may not be covered with the cooling mat. Instead of the cooling pad, the air inlet 12b may be covered with a light-shielding ventilation member that naturally passes air without passing light. The light-shielding ventilation member is a member in which a plurality of thin plate members are fixed in a frame with a space therebetween, and the thin plate members are bent, or inclined to form a ventilation space through which air naturally passes without passing light.
Claims (2)
1. A method of ventilating a chicken house, the chicken house comprising:
an exhaust port provided in one of walls orthogonal to a cage row in which cages are continuously provided in one direction;
an exhaust fan mounted on the exhaust port;
a side wall air inlet formed in an upper portion of at least one of side walls parallel to the cage row; and
an air inlet adjusting device for opening and closing the side wall air inlet,
it is characterized in that the preparation method is characterized in that,
the exhaust fan is operated to exhaust air from the exhaust port, so that the internal space is at a negative pressure, and air is taken in from the external space through the side wall air inlet,
detecting a difference between a static pressure in the internal space and a static pressure in the external space, and controlling opening and closing of the side wall intake port by the intake air adjusting device so that the detected difference between the static pressures falls within a predetermined range,
detecting temperatures at a plurality of locations in the internal space, and controlling opening and closing and opening of the side wall intake port by the intake air adjusting device so that the detected temperatures fall within a predetermined range,
the side wall air inlet is divided into a plurality of side wall air inlets along the extending length direction of the cage protection row,
the air inlet adjusting device is composed of a plurality of units for adjusting the opening and closing and the opening degree of each divided side wall air inlet,
a temperature sensor is installed near each of the divided sidewall air inlets, the temperature sensor having at least the number of the divided sidewall air inlets,
the target value of the temperature is set to be higher as the side wall intake port is located further downstream than the exhaust port within a predetermined range as the target value of the temperature,
the control of the intake air adjusting device based on the detection of the pressure difference between the inside and the outside and the control of the intake air adjusting device based on the detection of the temperature are alternately performed at predetermined intervals.
2. A method of ventilating a chicken house according to claim 1,
the control of the intake air adjusting device based on the detected difference in static pressure is performed prior to the control of the intake air adjusting device based on the detected temperature,
in the control of the intake air adjusting device based on the detection of the pressure difference between the inside and the outside, the rotating plates belonging to the units of the intake air adjusting device that open and close the side wall intake ports divided into a plurality of parts are simultaneously rotated by the same angle,
in the control of the intake air adjusting device based on the detection of the temperature, the rotation angles of the rotating plates belonging to the units of the intake air adjusting device that open and close the side wall intake ports divided into a plurality of parts are made different.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2016/064710 WO2017199359A1 (en) | 2016-05-18 | 2016-05-18 | Method for ventilating chicken coop |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108882693A CN108882693A (en) | 2018-11-23 |
| CN108882693B true CN108882693B (en) | 2021-03-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201680084087.2A Active CN108882693B (en) | 2016-05-18 | 2016-05-18 | Method for ventilating chicken coop |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP6082506B1 (en) |
| KR (1) | KR102077003B1 (en) |
| CN (1) | CN108882693B (en) |
| WO (1) | WO2017199359A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102456107B1 (en) * | 2020-11-26 | 2022-10-17 | 나현석 | House system for pets using artificial intelligence |
| CN115268537B (en) * | 2022-06-09 | 2024-02-27 | 重庆美特亚电子科技有限公司 | Building farm ventilation control method and building farm |
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- 2016-05-18 KR KR1020187015599A patent/KR102077003B1/en active IP Right Grant
- 2016-05-18 WO PCT/JP2016/064710 patent/WO2017199359A1/en active Application Filing
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Also Published As
| Publication number | Publication date |
|---|---|
| KR102077003B1 (en) | 2020-02-13 |
| CN108882693A (en) | 2018-11-23 |
| WO2017199359A1 (en) | 2017-11-23 |
| JP6082506B1 (en) | 2017-02-15 |
| KR20180079410A (en) | 2018-07-10 |
| JPWO2017199359A1 (en) | 2018-05-31 |
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