JP3008828U - Air supply device using return air in livestock shed - Google Patents

Abstract

(57) [Summary] [Purpose] A single blower mixes fresh outside air with warm air in the stall to supply air to the breeding room. When the outside temperature rises, 100% of fresh outside air can be taken in. Maintains a constant discharge rate from the air supply duct regardless of changes in outside temperature.
Even if the outside air intake is fully closed, the minimum required amount of outside air can be introduced. [Structure] Outside air intake port 50 and warm air intake port 51 are provided on one end surface 44a and an upper surface 44b of a casing 44 which are adjacent to each other.
And open. A damper 54 is pivotally supported by a support shaft 56 at the inner corner of the casing 44 sandwiched between the intakes 50 and 51. The drive motor 46 is connected to the support shaft 56. A blower 55 is provided near the connection port 52 of the casing 44. A temperature sensor 47 and a control device 48 arranged in the breeding room are connected to the drive motor 46. An outside air intake slit 57 is continuously provided on the one end face 44a of the outside air intake port 50, and an opening area of the outside air intake slit 57 is adjusted by a slide shutter 58.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention supplies livestock and poultry such as pigs and broilers raised in livestock stalls with an appropriate amount of fresh outside air and warm air inside the stalls to supply livestock and poultry inside the livestock shed. The present invention relates to an air supply device using return air that can maintain a suitable constant temperature and can always ensure the minimum air supply required for livestock and poultry.

[0002]

[Prior art]

 The productivity of livestock and poultry such as pigs and broilers is significantly impaired when the temperature inside the stall changes significantly during the growing season or during livestock breeding, as well as during the growing season or during the growing season. It is known. The temperature change in this case is not only a gradual change with one cycle as one day, but also a small change of about ± 2 ° C several times per hour has a great influence on the productivity of livestock and poultry.

Therefore, by suppressing the intake of fresh outside air and returning the warm air in the livestock house as a part of the supply air supplied to the livestock house, the temperature in the livestock house is adjusted to the age of livestock and poultry. Various return air supply air supply devices have been proposed which are kept constant in total.

The return air supply device 1 of FIGS. 7 and 8 shows a first conventional example, and introduces outside air from the roof 3 of the barn 2 through the ceiling plate 4 to project into the breeding room 5. A casing 7 is connected to the lower end of the duct 6, and a baffle plate 8 for separating inside and outside air and a blower 9 for introducing warm air are provided above and below the inside of the casing 7, and a warm air intake port 10 is also provided on the lower surface of the casing 7. The air outlets 11 are respectively formed on the outer peripheral surface, and a blower 12 for introducing outside air is arranged in the outside air introducing duct 6. A constant speed type is used for the blower 9 for introducing warm air, and a variable type is used for the blower 12 for introducing outside air. By changing the rotation speed of the blower 12, the mixing ratio of outside air to a certain amount of warm air is changed. I am trying to change it.

A second conventional example of the air supply device using return air 20 shown in FIGS. 9 and 10 has a casing 21 attached to a suction port 24 that opens to a gable wall 23 of a livestock house 22, and supplies air to the casing 21. The duct 25 is connected. In the casing 21, a damper 26 is provided so as to be openable and closable around a center as a fulcrum at an outside air intake port 21a on the suction port side, and a blower 27 is provided inside the connection port 21b on the air supply duct side. In addition, a warm air intake port 21c is provided on the side surface or the upper surface of the casing 21, and the outside air adjusted by the opening degree of the damper 26 is mixed with the warm air from the warm air intake port 21c to be fed from the air supply duct 25 to the breeding room. It is designed to supply air.

A return air utilization air supply device 30 shown in the third conventional example of FIG. 11 uses an air supply duct 32 in a livestock building 31, and a set of two blowers 33, 34 is provided in the air supply duct 32. It is installed inside. The air supply duct 32 is provided with an outside air intake 32a on the lower surface of the end portion protruding from the breeding room 35, and a warm air intake 32b on the lower surface between the blowers 33 and 34, respectively. The fresh air outside the house is introduced by the rotation of the inside of the house, and the warm air inside the breeding room 35 is introduced into the damper 36 while the intake amount is adjusted by the rotation of the blower 34 inside.

[0007]

[Problems to be solved by the device]

 However, in the case of the first conventional example, the cost is high because two blowers are used, and since the amount of intake of outside air is not constant, the amount of air discharged to the breeding room changes, and as a result, the position where the supply air falls The impact on livestock and poultry, especially larvae and poultry, is large because it changes each time. Furthermore, if the air blowing capacity is increased, the wind speed on the floor near the equipment will become too high, and if the air blowing capacity is weakened, the number of installed units will be increased.

Further, in the second conventional example, a large amount of fresh outside air can be taken in by increasing the capacity of the blower, and since air is supplied using the air supply duct, relatively uniform air supply is possible. However, since the warm air intake of the casing remains open, the amount of outside air taken in is only half of the air blowing function.

Next, in the case of the third conventional example, two blowers are required as in the first conventional example, and it is very difficult to synchronize the opening / closing of the damper with the drive balance of the blower arranged in series. It is hard to say that the air supply device is efficient and efficient.

As described above, in the first to third conventional examples, a plurality of blowers are required and the supply amount of air changes, so that the drop position of the supply air is not stable and the intake amount of fresh outside air is large. However, there are many problems such as insufficient ventilation in the season when the outside temperature is high and complicated drive balance of multiple blowers and adjustment of damper opening.

Further, if the temperature setting is too high or the outside air temperature falls below the expected value, the blower for taking in outside air will stop, or the damper will fully close the outside air intake port, and the outside air will not be exposed for a long time. It will not be taken in, and as a result, ventilation in the breeding room will fall and cause frequent respiratory diseases, but in the above-mentioned first to third conventional examples, countermeasures against such problems are taken. Not taken.

[0012] Therefore, the present invention can supply fresh air and warm air in the stall by mixing it with one blower in one device, and can take in 100% of fresh air when the outdoor temperature rises. In addition, the amount of air discharged from the air supply duct can be kept constant regardless of changes in the outside temperature, and even when the supply of outside air is stopped, it can be adjusted according to the number of feathers and the age of livestock and poultry. It is an object of the present invention to provide a return air supply air supply device for livestock sheds that can maintain the ventilation of the breeding room by taking in the minimum amount of outside air.

[0013]

[Means for Solving the Problems]

 According to the above-mentioned object, in the first invention, the warm air in the livestock house is mixed with the outside air introduced into the casing from the outside, and the air is supplied from the air supply duct connected to the supply port of the casing to the breeding room in the livestock house. In the air supply device using return air in a livestock house, an outside air intake and a warm air intake are opened on two adjacent surfaces of the casing, and one end is introduced into the casing inside the outside air intake and the warm air intake. A damper that is pivotally supported by a support shaft at the inner corner of the casing sandwiched between the mouth and the drive motor connected to the support shaft to rotate between the outside air intake port and the warm air intake port, An air blower that takes in outside air and / or warm air from both intake ports into the casing and sends the air from the connection port to the air supply duct is provided. The drive motor is provided with a temperature sensor provided in the breeding room. And the temperature A controller for operating the drive motor based on the temperature detected by the sensor is connected, and the outside air intake is extended in the direction opposite to the spindle from the length from the spindle of the damper to the tip edge of the damper. The extended opening portion serves as an outside air intake slit, and a slide shutter for adjusting the opening area of the outside air intake slit is provided on either one of the damper and the casing.

Further, in the second invention, warm air in the livestock house is mixed with outside air introduced into the casing from outside the house, and air is supplied to the breeding room in the livestock house from the air supply duct connected to the supply port of the casing. In the air supply device using return air in a livestock house, an outside air intake port and a warm air intake port are opened on two adjacent surfaces of the casing, and one end is outside air intake port and warm air intake port inside the casing. A damper that is pivotally supported by a shaft at an inner corner of the casing sandwiched between the mouth and a shaft that rotates between the outside air intake port and the warm air intake port by the operation of a drive motor connected to the shaft. A blower that takes in outside air and / or warm air from both intakes into the casing and sends it from the connection port to the air supply duct is provided, and the drive motor is provided with the temperature provided in the breeding room. Sensor and temperature A controller for operating the drive motor based on the temperature detected by the temperature sensor is connected, and at the same time, an outside air intake slit having a smaller area than the outside air intake is formed on any one surface of the casing, and the casing and the casing are connected to each other. A slide shutter for adjusting the opening area of the outside air intake slit is provided on either one of the dampers.

[0015]

[Action]

 According to the configurations of both of the above inventions, when the blower in the casing rotates, fresh outside air from the outside air intake port and fresh air from the warm air intake port enter the inside of the casing, and are mixed, Further, by the rotation of the blower, it is sent from the connection port of the casing to the breeding room through the air supply duct. The controller sets the optimum temperature based on the number of breeding heads and the age of livestock and poultry in the breeding room, and drives based on the difference between this optimal set temperature and the temperature of the breeding room measured by the temperature sensor. The motor operates to rotate the damper in the casing between the outside air intake and the warm air intake.

By changing the angle of the damper in this way, the ratio of the outside air and the warm air taken into the casing is changed, and the breeding room is kept in a constant temperature range suitable for livestock and poultry. Further, at the time of maximum movement of the damper, either one of the outside air intake port or the warm air intake port is blocked by the damper, and 100% of the outside air or warm air is taken in from the other fully opened intake port. Changing the damper angle only changes the proportion of outside air and warm air, and the amount of air blown from the casing to the breeding room is always kept constant regardless of the damper stop angle.

In addition, even if the damper is fully closed at the outside air intake port because the temperature is set too high or the outside air temperature drops more than expected, the opening degree of the outside air intake slit should be adjusted according to the sliding condition. By adjusting the shutter according to the number of breeding feathers and the age of the day, it is possible to ventilate the breeding room by introducing the minimum amount of outside air required for the growth of livestock and poultry from the outside air intake slit. it can.

[0018]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS.

Two sets of return air use air supply devices 41, 41 and air supply ducts 43, 43 are used in the barn 40. Each return air use air supply device 41 faces the upper part of the breeding room 42. A casing 44 connected inside the end wall 40a, a drive motor 46 externally attached to the casing 44, and a temperature sensor arranged in the breeding room 42 at the end of the air supply duct 43 that is piped together. It has 47 and a control device 48.

The one end surface 44 a of the casing 44 is arranged so as to penetrate the end wall 40 a and project outside the livestock shed 40, and is covered by the hood 49 on the other four sides except the lower side. An outside air intake port 50 and a warm air intake port 51 are provided on one end face 44a outside the house and an upper face 44b inside the breeding room 42 adjacent to the outside face 44a and the other end face 44c of the casing 44 facing the outside air intake port 50. The connection port 52 is opened in the above, and the above-mentioned air supply duct 43 is connected to the flange 53 which surrounds the connection port 52 and projects from the other end surface 44c.

The outside air intake port 50 and the warm air intake port 51 are set at the same position from the support shaft 56 and have the same size. Further, the lower side of the outside air intake 50 is opened slightly longer than the length from a support shaft 56 of the damper 54 to the tip of the damper 54, which will be described later, and is covered by the damper 54 excluding the vertical length of the outside air intake 50. This unobstructed laterally elongated opening portion serves as an outside air intake slit 57 separate from the outside air intake port 50.

A slide shutter 58 for adjusting the opening of the outside air intake slit 57 is provided near the lower end of the one end face 44a. The slide shutter 58 has a thumbscrew 59 inserted into each of the long holes 58a, 58a in the vertical direction screwed to one end face 44a, and is attached to the one end face 44a so as to be vertically slidable. By changing the vertical position of the slide shutter 58, the opening degree of the outside air intake slit 57 can be adjusted and the amount of outside air introduced from the slit 57 into the breeding room 42 can be increased or decreased. When the upper limit is set to the upper limit, the outside air intake slit 57 is fully closed, and only the outside air intake port 50 is opened at the one end face 44a.

A damper 54 and a blower 55 are provided inside the casing 44. A support shaft 56 is attached to an inner corner portion of the casing 44 sandwiched between the outside air intake port 50 and the warm air intake port 51, and a damper 54 has a base end connected to the support shaft 56 and is connected to the outside air intake port 50. The warm air intake 51 and the warm air intake 51 are rotatably supported in a range of 90 degrees. At the horizontal position which is the upper limit of rotation, the warm air intake 51 is fully closed from the inside of the upper surface 44b, and the lower rotation limit is set. In this vertical position, the outside air intake 50 is fully closed from the inside of the one end face 44a.

The blower 55 is arranged close to the inside of the connection port 52, and depending on the rotation of the blower 55 and the stop angle of the damper 54, the blower 55 may be installed outside the house from either or both of the intake ports 50 and 51. Either or both of fresh outside air and warm air in the breeding room 42 are taken into the casing 44 and fed to the breeding room 42 through the connection port 52 through the air supply port 43a of the air supply duct 43.

The drive motor 46 is connected to the support shaft 56 of the damper 54 at one end of the support shaft projecting from the casing 44. The temperature sensor 47 is installed in the breeding room 42 at a height close to livestock and poultry, and measures the ambient temperature near livestock and poultry. Further, the control device 48 is attached to an operable position on the wall surface such as the wife wall 40a, and the optimum temperature is set by the setting dial 48a based on the number of livestock and poultry in the breeding room 42 and the age of breeding. Is set.

The temperature sensor 47 and the control device 48 are connected by a lead wire 57 a, and the control device 48 and the drive motor 46 are connected by a lead wire 57 b, and the rearing measured by the temperature sensor 47 is carried out. The temperature of the chamber 42 enters the control device 48 and is compared with the set temperature, and the drive motor 46 operates on the basis of this difference, causing the damper 54 in the casing 44 to move between the outside air intake port 50 and the warm air intake port 51. Rotate.

By rotating the blower 55, fresh air outside the house is taken into the casing 44 through the outside air intake 50 and the outside air intake slit 57, and warm air inside the breeding room 42 is taken in through the warm air intake 51, respectively. Further, it is sent from the connection port 52 to the breeding room 42 through the air supply duct 43. The slide shutter 58 is normally located at the upper limit, the outside air intake slit 57 is fully closed, and only the outside air intake port 50 is opened at the one end face 44a. The outside air intake port 50 is opened depending on the stop angle of the damper 54. Then, the ratio of the outside air and the warm air taken into the casing 44 from the warm air intake 51 is changed. At the rotation upper limit or rotation lower limit position where the damper 54 has moved to the maximum, either the outside air intake port 50 or the warm air intake port 51 is fully closed by the damper 54 and the other is in the fully open state. Although 100% of outside air or warm air is taken in from the intake port, the amount of air blown to the breeding room 42 is always kept constant regardless of the stop position of the damper 54.

The present embodiment is configured as described above, and normally the slide shutter 58 is positioned at the upper limit and the outside air intake slit 57 is fully closed. Then, when the temperature of the breeding room 42 measured by the temperature sensor 47 becomes equal to or higher than the set temperature of the control device 48, the damper 54 gradually rotates in a direction of expanding the outside air intake port 50, and the outside air intake port 50 from the outside air intake port 50. When the amount of intake of outside air is increased and the temperature of the breeding room 42 becomes equal to or lower than the set temperature of the control device 48, the damper 54 gradually rotates in the direction of narrowing the outside air intake 50, and the outside air from the outside air intake 50 is increased. Decrease the uptake amount of. As described above, the drive motor 46 is rotated by a necessary amount based on the temperature of the breeding room 42 measured by the temperature sensor 47 and the set temperature of the control device 48, and the angle of the damper 54 is changed, whereby the outside air intake port is changed. The ratio of the outside air and the warm air taken into the casing 44 from the warm air intake port 50 and the warm air intake port 51 is changed, and the breeding room 42 is maintained in a constant temperature range preferable for livestock and poultry.

Next, FIG. 4 shows the test results when this example was applied to a fattening pig pen. That is, of the fattening pig houses A and B constructed adjacent to each other, only one of the fattening pig houses A was provided with the air supply device 41 using the return air, and the fattening pig houses B had only natural ventilation. The measurement was carried out for 12 hours from 2:00 to 14:00 in January, but the wind speed outside the house was high from 2:00 to 8:00 on the day of the day, and the fattening pig house B was greatly affected by it. The room temperature could not be maintained higher than that of pig house A, and the temperature inside the house also changed significantly in response to changes in the wind speed outside the house.

On the other hand, in the fattening pig house A using the air supply device 41 using the return air, since the inside of the house was kept at positive pressure, the temperature in the above-mentioned time zone is affected by the wind speed outside the house. The temperature was maintained at 14 to 15 ° C. In addition, the temperature of fattening pighouse A remained slightly higher as the daytime outside temperature increased, because the capacity of the installed blower 55 was small for the number of accommodated pigs. It was possible to set it within the upper limit of a certain range of 10 ° C to 20 ° C.

On the other hand, in the breeding room A using the return air utilization air supply device 41, since the inside of the house was kept at a positive pressure, the temperature in the above-mentioned time zone is affected by the outside wind speed. It was maintained at 14 to 15 ° C. In addition, the temperature of the breeding room A was close to 20 ° C due to the rise of the outside temperature during the daytime because the capacity of the installed blower 55 was small for the number of accommodated animals, so it was still within the upper limit of the allowable range. I was able to.

On the other hand, in the summer when the outside temperature is high, the warm air intake 51 is fully closed by the damper 54, and 100% of fresh outside air is taken into the casing 44 from the open outside air intake 50 to raise the animals. It can be supplied to the chamber 42. Furthermore, when the temperature setting of the control device 48 is too high or the outside air temperature drops more than expected, the outside air intake 50 is fully closed, but the upper and lower positions of the slide shutter 58 are changed, By adjusting the opening degree of the outside air intake slit 57 according to the number of breeding feathers and the age of the day, the outside air intake slit 57 introduces the minimum amount of outside air required for the growth of livestock and poultry, and the breeding room 42 ventilation can be maintained.

5 and 6 show another embodiment of the present invention, in which the slide shutter 58 of the outside air intake slit 57 and the elongated hole 58a below the outer surface of the damper 54 are shown. It has substantially the same configuration except that it is attached using a thumbscrew 59. As in the above embodiment, the slide shutter 58 is slid vertically to adjust the opening area of the outside air intake slit 57. By doing so, the amount of outside air introduced into the breeding room 42 from the slit 57 can be increased or decreased.

Although the above-described embodiment has been described by using two sets of air supply devices using return air in the livestock housing, the present invention is based on the livestock housing in the breeding room, the number of livestock of poultry, etc. One or more units are installed on one end or both ends of the end wall. Further, the outside air intake slit may be independently formed on any one surface of the casing without being continuous with the outside air intake port, and the slide shutter may be slid laterally.

[0035]

[Effect of device]

 According to the device of the present invention, it is possible to easily adjust the mixing ratio of the fresh air and the warm air in the stall to supply air to the breeding room, and when the outside temperature rises, the fresh air can reach 100%. It is possible to take in air, and moreover, the amount of air discharged from the air supply duct can be kept constant regardless of changes in the outside air temperature. Furthermore, since only one blower is required for one device, it is easy to operate and the manufacturing cost and running cost can be kept low.

Further, since the opening area of the outside air intake slit, which is set separately from the outside air intake port, can be adjusted by the slide shutter, the temperature setting of the control device is too high and the outside air temperature is predicted. If the air intake slit is lowered, the opening degree of the outside air intake slit can be adjusted with the slide shutter according to the number of heads and the age of the breeding animals. Ventilation of the breeding room can be maintained by introducing the minimum amount of outside air required for growth, and the occurrence of respiratory diseases and the like due to poor ventilation of livestock and poultry can be reduced.

[Brief description of drawings]

FIG. 1 is a perspective view of an air supply device using return air according to an embodiment of the present invention.

FIG. 2 is a sectional view of FIG.

FIG. 3 is a cross-sectional view of a livestock house to which the air supply device using return air of FIG. 1 is applied.

FIG. 4 is a graph showing a temperature change in an experiment conducted in a fattening pig breeding room.

FIG. 5 is a perspective view of a return air supply device according to another embodiment of the present invention.

6 is a sectional view of FIG.

FIG. 7 is a sectional view of a barn explaining a first conventional example.

8 is an enlarged cross-sectional view of the main part of FIG.

FIG. 9 is a perspective view of a return air supply device for explaining a second conventional example.

FIG. 10 is a sectional view of FIG.

FIG. 11 is a sectional view of a barn explaining a third conventional example.

[Explanation of symbols]

 40 ... Livestock building 40a ... Wife wall of livestock building 40 41 ... Air supply device using return air 42 ... Breeding room in livestock house 43 ... Air supply duct 44 ... Casing of air supply device 41 using return air 46 ... Drive motor 47 ... Temperature sensor 48 ... Control device 49 ... Hood 50 ... Outside air intake 51 ... Warm air intake 52 ... Connection port 54 ... Damper 55 ... Blower 56 ... Support shaft of damper 54 57 ... Outside air intake slit 58 ... Slide shutter 58a ... Long hole 59 ... Butterfly screw

Claims (2)

[Scope of utility model registration request] 1. Use of return air in a livestock house in which warm air in the livestock house is mixed with outside air introduced into the casing from outside the house and air is supplied to a breeding room in the livestock house from an air supply duct connected to a supply port of the casing. In the air supply device, an outside air intake port and a warm air intake port are formed on two adjacent surfaces of the casing, and a base end of the casing is sandwiched between the outside air intake port and the warm air intake port inside the casing. A damper, which is pivotally supported by an inner corner portion by a support shaft and is rotated between a fresh air intake port and a warm air intake port by the operation of a drive motor connected to the support shaft, Alternatively, a warm air is taken into the casing, and a blower for feeding the warm air to the air supply duct is provided, and the drive motor is provided with a temperature sensor provided in the breeding room and detection of the temperature sensor. Drive based on temperature A control device for operating a dynamic motor is connected, and the outside air intake is opened by extending in a direction opposite to the spindle from the length from the spindle of the damper to the tip of the damper. Is used as an outside air intake slit, and a slide shutter for adjusting an opening area of the outside air intake slit is provided in either one of the damper and the casing. 2. Use of return air in a livestock house in which warm air in the livestock house is mixed with outside air introduced into the casing from the outside and air is supplied to a breeding room in the livestock house from an air supply duct connected to a supply port of the casing. In the air supply device, an outside air intake port and a warm air intake port are provided on two adjacent surfaces of the casing, and one end of the casing is sandwiched between the outside air intake port and the warm air intake port inside the casing. A damper, which is pivotally supported by an inner corner portion by a support shaft and is rotated between a fresh air intake port and a warm air intake port by the operation of a drive motor connected to the support shaft, Alternatively, warm air is taken into the casing, and a blower that supplies the warm air to the air supply duct from the connection port is provided, and the drive motor is
A temperature sensor arranged in the breeding room and a control device that operates a drive motor based on the temperature detected by the temperature sensor are connected, and on any one surface of the casing,
An outside air intake slit having a smaller area than the outside air intake port is formed, and one of the casing and the damper,
An air supply device using return air in a livestock house, comprising a slide shutter for adjusting an opening area of the outside air intake slit.