JP6872721B2 - Control device for the ventilation system of the poultry house - Google Patents

Description

The present invention relates to a ventilation system in a poultry house in which a broiler is bred.

For broilers, the final growth size depends on the environmental conditions, especially in the early days. Therefore, it is necessary to finely manage the environment such as the temperature inside the poultry house according to the number of breeding days. For example, if the temperature outside the poultry house is lower than the temperature required for a broiler of the age at that time, the temperature inside the poultry house must be maintained at a predetermined temperature by a heater such as a gas bruder.

On the other hand, even in the cold season when the outside air temperature is low, it is necessary to ventilate with the minimum air volume according to the age in order to improve the air quality in the poultry house. Here, the air quality refers to the concentration of each component in the air, such as oxygen concentration, carbon dioxide concentration, carbon monoxide concentration, ammonia concentration, and dust concentration in the air.

Ventilation of the poultry house includes natural ventilation and forced ventilation according to the structure of the poultry house. The poultry house targeted by the present invention is a windless poultry house, and forced ventilation using a ventilation fan has been conventionally performed.

In the conventional ventilation of a windless poultry house, outside air is introduced from an air inlet and the air inside the house is discharged by a ventilation fan. Therefore, the temperature control and ventilation control in the poultry house were performed by starting / stopping the heater and starting / stopping the ventilation fan. In the following, the Windless poultry house will be abbreviated as a poultry house.

That is, even when the outside air temperature in the cold season is low, the outside air is introduced into the poultry house for ventilation. However, the temperature inside the poultry house drops sharply due to the introduction of cold outside air. Therefore, the ventilation volume is reduced. This causes deterioration of the air quality in the poultry house.

On the other hand, in order to prevent the temperature inside the poultry house from dropping even if cold outside air is introduced, the number of bruder installed must be increased. This is not preferable because the initial investment and fuel costs such as gas are high.

In view of these circumstances, a method has been proposed in which cold outside air is not introduced into the poultry house as it is. As an example, Patent Document 1 discloses a livestock barn equipped with a heat exchanger.

Further, in Patent Document 2, a plurality of poultry farms separated and separated by a partition wall are extended in the internal longitudinal direction of the poultry house, and a large-diameter fan, a medium-diameter fan, and a small-diameter fan are provided at positions corresponding to each poultry farm. The arranged windless poultry house structure is disclosed.

Jikkensho 61-004166 Gazette Japanese Unexamined Patent Publication No. 08-909820 (Patent No. 2535137)

Patent Document 1 discloses a livestock barn equipped with a heat exchanger. The heat exchanger exchanges the carbon dioxide generated by the broiler in the barn and the air having the amount of heat generated by the body temperature with the air introduced from the outside of the barn, raises the temperature of the cold outside air, and introduces the air into the barn. By doing so, it is intended to introduce cold outside air directly into the barn and prevent the temperature in the barn from dropping sharply.

However, as already mentioned, the broiler requires fine temperature control and ventilation control in the poultry house according to the number of breeding days, and it is difficult to achieve both energy saving and temperature control in the poultry house just by installing a heat exchanger. And the control method of the heat exchanger that performs the ventilation management with energy saving has not been devised.

In particular, heat exchangers are relatively expensive, so the smaller the number of heat exchangers installed, the smaller the initial investment. On the other hand, even if the heat exchanger is arranged so as to obtain the ventilation volume that can be assumed with a safety factor, environmental waste gas such as carbon dioxide, carbon monoxide, ammonia, and dust that exceeds the ventilation capacity is generated in extremely rare situations. There is a risk of

The control device for the ventilation system of the poultry house according to the present invention was conceived in view of the above problems, and provides a control device for efficiently operating the ventilation system in the poultry house having a heat exchanger. Is.

More specifically, the control device for the ventilation system of the poultry house according to the present invention is
With a rectangular floor
The side wall provided on the long side of the rectangle and
The gable wall provided on the short side of the rectangle and
A building composed of a roof covering the floor surface and
A plurality of heaters arranged in the longitudinal direction between the side walls, and
Of the wife walls, a ventilation fan with a door placed on one of the wife walls,
Of the wife walls, a shutter arranged on the other wife wall or the side wall near the wife wall,
The heat exchanger provided on the side wall and
With the environmental meter placed inside the building,
A control device for a ventilation system in a poultry house equipped with an outside air thermometer located outside the building.
At least connected to the environmental meter and the outside air thermometer,
Control the operation of the heat exchanger and the ventilation fan with a door,
It is characterized in that the ventilation fan with a door is operated when the ventilation volume by the heat exchanger does not reach a predetermined amount determined based on the value from the environment measuring meter.

Even if the control device for the ventilation system of the poultry house according to the present invention uses heat exchangers distributed in the poultry house, if it is determined that the ventilation volume is insufficient, the ventilation fan is used for ventilation. It is possible to prevent waste gas and the like from staying in the poultry house. As a result, both energy saving and good heat and air quality environment in the poultry house are compatible, and efficient broiler growth is possible.

It is the appearance and the plan view of the poultry house which incorporated the control device of the ventilation system which concerns on this invention. It is a figure which shows the structure of a heat exchanger. It is a figure which shows the structure of a control device. This is the processing flow of the control device. It is a graph which shows the temperature change in a poultry house when temperature control is performed. It is a detailed flow of the process of operating the heat exchanger. It is a figure which shows the example of the case of ventilating for each breeding zone.

The control device for the ventilation system of the poultry house according to the present invention will be described below with reference to the drawings. The following description exemplifies one embodiment of the control device for the ventilation system of the poultry house according to the present invention, and the present invention is not limited to the following description. The following embodiments can be modified without departing from the spirit of the present invention.

FIG. 1 shows a perspective perspective view (FIG. 1 (a)) and a plan view (FIG. 1 (b)) of the poultry house having the control device 30 for the ventilation system of the poultry house according to the present invention. The poultry house 1 into which the poultry house ventilation system control device 30 according to the present invention is introduced has a rectangular floor surface 2, side walls 3a and 3b provided along the long side, and a wife wall provided along the short side. It has 4a and 4b and a roof 5. This is for tunnel-type ventilation, as will be described later. Therefore, even if the floor surface 2 is square, if the inside is divided into strips and divided into rectangular sections, it can be said that the poultry house 1 is the target of the control device 30 of the ventilation system according to the present invention.

As for the side walls 3a and 3b, the inside of the poultry house 1 is referred to as an inner side wall 3ai and 3bi, and the outside of the poultry house 1 is referred to as an outer wall 3ao and 3bo. In FIG. 1B, only the inner side wall 3ai and the outer wall 3ao are shown. Further, the floor surface 2 can be divided into a plurality of breeding zones Bz. Normally, since the breeding area is expanded in the poultry house 1 according to the age, it is preferable that the poultry house 1 can be divided into a plurality of breeding zones Bz. FIG. 1B shows a case where there are four breeding zones Bz.

In the poultry house 1, a heater 10 (also referred to as a "blueder") is installed along the center line 2a of the floor surface 2. The heater 10 may be placed directly on the floor surface 2 or may be suspended at a certain height from the ceiling. The intervals 10a of each heater 10 are approximately equal. This is because the heater 10 is placed to keep the temperature in the poultry house 1 constant, and it is desirable that the temperature at an arbitrary position on the floor surface 2 becomes constant. The floor surface 2, the side walls 3a and 3b, the end walls 4a and 4b, and the roof 5 are referred to as a building.

Therefore, it is desirable that the distance 3L between the side walls 3a and 3b is set so that the effect of the heater 10 reaches the wall when the heater 10 is placed exactly in the center.

A ventilation fan 12 with a door is provided on one of the end walls 4a. A shutter 13 that can be opened and closed is provided on the other end wall 4b. In FIG. 1, four rows of upper and lower two-stage ventilation fans 12 with doors are arranged on the end wall 4a, and shutters 13 of the same size are arranged on the end wall 4b at positions facing the ventilation fans 12 with doors. It shows the situation. The shutter 13 may be provided on the side walls 3a and 3b near the end wall 4b. In FIG. 1, the shutter 13a is shown on the side wall 3a side, but it is also provided on the side wall 3b.

Heat exchangers 14 are provided facing each other on the side walls 3a and 3b facing each other. In FIG. 1B, 16 heat exchangers 14 are arranged on the side walls 3a and 3b, respectively. In FIG. 1A, only one heat exchanger 14 is shown. Further, a side wall inlet 40 is provided on the upper part of the side walls 3a and 3b, and a ceiling inlet 42 is arranged on the roof 5. These inlets can be opened and closed, and either one or both may be provided. Since these inlets generate almost no wind in the breeding area (height direction) of the poultry house 1, they can be used as an effective ventilation means when the chicks are young.

FIG. 2 shows a simple configuration of the heat exchanger 14. In the following description, the side wall 3a side will be described, but the same applies to the side wall 3b side. The heat exchanger 14 includes a heat exchange element 14a, an exhaust system air passage 14o for discharging the air inside the poultry house 1 to the outside of the poultry house 1, and an air supply system air passage 14i for taking in the air outside the poultry house 1 into the poultry house 1. Consists of.

The heat exchange element 14a brings the air passage 14o of the exhaust system and the air passage 14i of the air supply system close to each other to give the heat amount of the air of the exhaust system to the air of the air supply system (explicit heat exchange), or also the humidity of the exhaust system. It may be a type that gives air to the air supply system (total heat exchange).

It is most desirable that the heat exchanger 14 has both a sensible heat exchange element and a total heat exchange element built-in as the heat exchange element 14a and can be switched by an instruction from the outside. The case of operating with a sensible heat exchange element is called a sensible heat operation, and the case of operating with a total heat exchange element is called a total heat operation.

In the exhaust system of the heat exchanger 14, an inside air suction port 14oi that takes in air in the poultry house 1 is provided below the inner side wall 3ai. The inside air suction port 14oi is set higher than the floor surface 2 by a predetermined height of 3 hours. This is to prevent the flow of air flowing toward the inside air suction port 14oi from hitting the young chicks as much as possible. This is because chickens do not grow significantly after 40 to 50 days when exposed to cold air at a young age. Further, the inside air discharge port 14oo, which is an outlet for the air in the exhaust system, is provided in the lower part of the heat exchanger 14.

Further, a fan 14of is provided in the middle of the air passage 14o of the exhaust system to generate an air flow from the inside of the poultry house 1 to the outside of the poultry house 1. In the exhaust system, air reaches the heat exchange element 14a from the inside air suction port 14oi through the air passage 14o of the exhaust system, is sent out from the heat exchange element 14a to the inside air discharge port 14oo, and is discharged to the outside of the poultry house 1.

The air supply system of the heat exchanger 14 is provided with an outside air suction port 14ii that takes in the air outside the poultry house 1 at the upper part of the heat exchanger 14. Further, the outside air outlet 14io, which is an outside air outlet, is provided above the inner side wall 3ai. A fan 14if is also provided in the air passage 14i of the air supply system, and creates an air flow from the outside of the poultry house 1 toward the inside of the poultry house 1. In the air supply system, the air reaches the heat exchange element 14a from the outside air suction port 14ii, is sent out from there to the outside air outlet 14io in the poultry house 1, and is discharged into the poultry house 1.

With reference to FIG. 1B again, it is desirable that a plurality of heat exchangers 14 are provided on the side walls 3a and 3b of the poultry house 1. This is because the range that can be covered by one heat exchanger 14 is not so wide, and if there are many heat exchangers 14, it is easy to set the inside of the poultry house 1 to a uniform environment.

A ventilation fan 12 with a door (hereinafter, also simply referred to as “ventilation fan 12”) is provided on the end wall 4a, and a shutter 13 is provided on the end wall 4b. The ventilation fan 12 with a door ventilates the poultry house 1 so as to exhaust the air to the outside. Further, a wind guide fan 12a (see FIG. 1A) that sends air from the end wall 4b to the end wall 4a may be provided.

The poultry house 1 is further provided with some sensors. First, an outside air thermometer 16a and an outside air hygrometer 16b are provided outside the poultry house 1. Further, the poultry house 1 is provided with an in-house thermometer 18a, an in-house hygrometer 18b, and an environmental measuring meter 20 capable of measuring carbon dioxide, carbon monoxide, ammonia, and the amount of dust.

Although the environmental measuring meter 20 is shown as one in FIG. 1B, it is assumed that there are separate measuring instruments such as a carbon dioxide meter 20a, a carbon monoxide meter 20b, an ammonia meter 20c, and a dust meter 20d. Further, the measured values obtained from the environmental measuring meter 20 are collectively referred to as an environmental index Ev. Therefore, the environmental measuring meter 20 may be called an environmental index measuring device.

Further, the poultry house 1 may be provided with a camera 22 (see FIG. 1A). The floor surface 2 of the poultry house 1 is divided into a plurality of breeding zones Bz. Then, the number of cameras 22 is arranged so as to be able to determine whether or not there are broilers in at least all the breeding zone Bz.

In order to control the ventilation system of the poultry house 1, the poultry house 1 is provided with a control device 30. The control device 30 determines the operation of the ventilation fan 12 with a door, the shutter 13, the side wall inlet 40, the ceiling inlet 42, and the heat exchanger 14 based on the outside air and the temperature and humidity inside the building. The operation of the camera 22 and the wind guide fan 12a may be controlled.

FIG. 3 shows the configuration of the control device 30. The control device 30 operates with an MPU (Micro Processor Unit), a memory of 30 m, and a control program. Further, the control device 30 is connected to an input device 31 for giving an instruction from the outside and a display device 32 capable of displaying the state in the poultry house 1.

Signals Rq from the outside air thermometer 16a, the outside air hygrometer 16b, the building thermometer 18a, the building hygrometer 18b, the environment measuring meter 20, and the input device 31 are input to the control device 30. Further, the control device 30 is connected to a heater 10, a ventilation fan with a door 12, a shutter 13, a side wall inlet 40, a ceiling inlet 42, each heat exchanger 14, and a display device 32. Then, instruction signals (C10, C12, C13, C14, C32, respectively) can be output to these devices to control the operation. If there are a plurality of the heater 10, the ventilation fan 12 with a door, the shutter 13, the side wall inlet 40, the ceiling inlet 42, and each heat exchanger 14, an instruction signal can be output to each device. .. That is, each device can be controlled independently.

Further, in the control device 30, a timer 30T, a control temperature determination unit 30A, a control ventilation volume determination unit 30B, a breeding zone determination unit 30C, a heat exchanger control unit 30D, a date determination unit 30E, and an outside air temperature detection unit 30F Is provided. These may be provided with a dedicated circuit in the control device 30, but may be realized by software as a control program.

The operation of the control device 30 of the ventilation system of the poultry house 1 having the above configuration will be described while showing the flow. FIG. 4 is a part of the control flow of the ventilation system of the control device 30. The control device 30 may perform more control than shown here.

When the process starts (step S100), the initial setting is performed (step S102). As initial settings, control temperature Tc for day age, control humidity Hc, lower limit temperature control width ΔT1, upper limit temperature control width ΔT2, minimum ventilation volume Ae, correction value Ad value by environmental index Ev, designation of breeding zone Bz, etc. Entered. Although the correction value Ad will be described later, it is a value to be considered when determining the number of operating heat exchangers 14. Further, the lower limit temperature control width ΔT1 and the upper limit temperature control width ΔT2 are also the grace of temperature control, which will be described later. These values change depending on the age of the broiler. Therefore, the formula for obtaining the value according to the age and the table of each variable for each age are input in advance at the time of initial setting.

After that, when the broiler chicks are accepted (Y branch in step S104), management is started. The breeding zone Bz described in the initial setting may be input at this point. The control device 30 starts the internal timer 30T (step S106). Alternatively, record the date and time of the acceptance date. After that, the current age is determined by the age determination unit 30E based on the value of the timer 30T or the elapsed time from the acceptance date. That is, the age determination unit 30E returns the current age Rd when requested. Here, the day age of the accepted day (“current day age Rd” at this stage) is recorded in the management day age Md.

Next, the control parameters Mp such as the control temperature Tc, the control humidity Hc, the lower limit temperature control width ΔT1, the upper limit temperature control width ΔT2, and the minimum ventilation volume Ae are determined based on the control date Md (step S108). The control temperature Tc, the control humidity Hc, the lower limit temperature control width ΔT1 and the upper limit temperature control width ΔT2 are determined by the control temperature determination unit 30A based on the control date Md. The correction value Ad based on the minimum ventilation volume Ae and the environmental index Ev is determined by the management ventilation volume determination unit 30B based on the management day age Md. The correction value Ad may consider the breeding zone Bz. After that, if this routine is passed, the management parameter Mp is updated according to the management age Md at that time.

Next, the outside air temperature To obtained by the outside air temperature detection unit 30F by the outside air thermometer 16a is compared with the temperature obtained by subtracting the lower limit temperature control width ΔT1 ° C. from the control temperature Tc determined based on the control date Md (step S110). .. Then, if the outside air temperature To is low (Y branch in step S110), the heat exchanger 14 is started (step S112). That is, when the outside air temperature To drops below the control temperature Tc to the lower limit temperature control width ΔT1 ° C. or higher, sufficiently cold air is taken in from the inside of the building, so the heat exchanger 14 is started to try to maintain the amount of heat. When starting the heat exchanger 14, the operation of the ventilation fan 12 with a door is stopped (step S112). If the heat exchanger 14 is already in operation, the process proceeds to step S118 without doing anything.

On the other hand, when the outside air temperature To is higher than the control temperature Tc minus the lower limit temperature control width ΔT1 ° C. (N branch in step S110), the value obtained by adding the upper limit temperature control width ΔT2 ° C to the control temperature Tc and the outside air temperature To Are compared (step S114). When the outside air temperature To is higher than the temperature obtained by adding the upper limit temperature control width ΔT2 ° C. to the control temperature Tc (Y branch in step S114), the heat exchanger 14 is stopped and the ventilation fan 12 with a door is started (step S116). ).

In this case, since cold air is not taken in from the outside of the building, the heat exchanger 14 is stopped. If the heat exchanger 14 has already stopped, the process moves to the next flow without doing anything. If the determination in step S114 is No, the process is moved to step S118 without doing anything. In step S110 and step S114, the inequality sign symbol does not include the case where the values are equal to each other, but it may be included. That is, the inequality sign in both steps may be either "<" or "≦".

Next, it is determined whether or not the management parameter Mp needs to be changed (step S118). This judgment is made based on whether or not the age has advanced. This is because the ventilation system operates according to the age. Specifically, if the management day age Md and the current day age Rd calculated by the day age determination unit 30E are different (N branch in step S118), it is determined that the management parameter Mp needs to be changed.

When it is determined that the change is necessary, the management date Md is incremented (step S120), and the process is moved to step S108. When it is not necessary to change the management parameter Mp (Y branch in step S118), the end determination (step S122) is performed. The end determination may be made based on whether or not the current date Rd is the scheduled shipping date RE.

When terminating (Y branch in step S122), the terminating process is performed (step S124) and stopped (step S126). If it does not end (N branch in step S122), the process moves to step S110.

FIG. 5 shows an operation image of the heat exchanger 14 controlled by the above flow. First, refer to FIG. 5 (a). FIG. 5A shows the operation of the heat exchanger 14 within a day. The horizontal axis is time and the vertical axis is temperature. The outside air temperature To drops from midnight to dawn even during the day. Further, as the sun rises, the outside air temperature To rises, and the outside air temperature To decreases again from early afternoon to early evening. The curve of the outside air temperature To shows this situation.

It is assumed that the control temperature Tc determined by the age Md at this time is determined as shown in FIG. 5A with respect to such a change in the outside air temperature To. Basically, the heat exchanger 14 is operated when the outside air temperature To is lower than the control temperature Tc, and is stopped when the outside air temperature To is higher than the control temperature Tc. Then, the control device 30 of the present invention starts operation when the outside air temperature To becomes lower than the control temperature Tc by the lower limit temperature control width ΔT1 ° C. or more. In FIG. 5A, the point “START 14” is the operation start point of the heat exchanger 14.

Further, when the outside air temperature To becomes higher than the control temperature Tc by the upper limit temperature control width ΔT2 ° C. or more, the operation is stopped. In FIG. 5A, the point “STOP 14” is the operation stop point of the heat exchanger 14. By performing such management, it is possible to give a sufficient amount of heat to the broiler even in a cold time of the day and to suppress unnecessary operation / stop hunting of the heat exchanger 14.

FIG. 5B is an explanatory diagram when the time axis is made longer. The horizontal axis is the number of breeding days, and the vertical axis is the temperature. The control temperature Tc is determined based on the age Md of the broiler, and the control temperature Tc decreases as the age Md advances. For example, the control temperature Tc of chicks up to 7 days of age is required to be about 30 ° C., but the control temperature Tc of adult birds that have passed 35 days of age and molted may be 16 to 18 ° C.

In FIG. 5 (b), it can be seen that the control temperature Tc decreases with the number of breeding days (day age). On the other hand, it is assumed that the outside air temperature To is moving from a low temperature to a high temperature as shown in FIG. 5 (b). Of course, the outside air temperature To changes depending on the season of the place where the poultry house 1 is erected.

Here, too, the heat exchanger 14 is operated when the outside air temperature To is lower than the control temperature Tc by the lower limit temperature control width ΔT1 ° C. or more, and is stopped when the outside air temperature To is higher than the control temperature Tc by the upper limit temperature control width ΔT2 ° C. or more. FIG. 5B shows that after the breeding days W, the heat exchanger 14 has entered a period when it is not necessary to use it. Of course, as shown in FIG. 5A, the operation is repeatedly started and stopped according to the temperature within the day. Therefore, even in the season when the outside air temperature To in the daytime is sufficiently higher than the temperature inside the building, the heat exchanger 14 operates if the temperature before dawn is lower than the control temperature Tc by the lower limit temperature control width ΔT1 ° C. or more.

Further, as shown in FIG. 5B, the lower limit temperature control width ΔT1 is set to a large value according to the age of the broiler, and the upper limit temperature control width ΔT2 is set to a small value according to the age of the broiler. There is. Broilers gain weight with age, and the amount of heat generated by the broilers themselves increases accordingly. The lower limit temperature control width ΔT1 is set as the amount corresponding to the rise in the temperature inside the building due to the amount of heat generated by the broiler itself. The upper limit temperature control width ΔT2 is a value provided to suppress hunting of operation / stop of the heat exchanger 14, and the width (ΔT1 + ΔT2) that becomes a dead zone is an upper limit to be a constant value regardless of the age. The temperature control width ΔT2 is set to a small value according to the age of the broiler. As a result, wasteful operation of the heat exchanger 14 can be suppressed, and fuel cost reduction and energy saving can be efficiently performed.

FIG. 6 is a flow in which the step (S112) in which the heat exchanger 14 of the flow of FIG. 4 operates is further detailed. When operating the heat exchanger 14, the minimum ventilation volume Ae is first determined (step S202). The minimum ventilation volume Ae is determined by the management ventilation volume determination unit 30B based on the management day age Md. This is because the amount of oxygen required for broilers is almost known according to the age of the day.

In addition, the environmental index Ev and the breeding zone Bz may be considered in determining the minimum ventilation volume Ae. This is because, depending on the season and the condition of the bedding at that time, dust may easily stand up, or the amount of ammonia in the air may increase due to improper cleaning.

When the environmental index Ev becomes high in this way, it is necessary to perform ventilation at or above the minimum ventilation volume Ae calculated from the age of the day. In FIG. 6, it is described as "Ae = F (Md, Ad)" that the minimum ventilation volume Ae is determined based on the correction value Ad determined by the management day age Md and the environmental index Ev.

Allowable amounts are set for each of carbon dioxide, carbon monoxide, ammonia, and dust in the environmental index Ev. Then, if any one of the items exceeds the permissible amount, the environmental index Ev is determined to be sufficiently large. In the ventilation system targeted by the present invention, the minimum ventilation volume Ae is determined based on the environmental index Ev. Since the ventilation system operates to provide ventilation equivalent to the minimum ventilation volume Ae, the environmental index Ev is a factor that determines the minimum ventilation volume Ae.

Therefore, determining to increase the environmental index Ev corresponds to giving an instruction to increase the ventilation volume. That is, when any one item of the environmental index Ev exceeds the permissible value, the value of the correction value Ad is set so that the minimum ventilation volume Ae becomes larger than the maximum ventilation volume 14Max of the heat exchanger 14 described later. As a result, the environmental index Ev is determined.

How the correction value Ad is determined by the environmental index Ev is determined by the type of broiler and other factors. It is desirable that the relationship between the environmental index Ev and the correction value Ad is input at the time of the initial setting (step S102 in FIG. 4).

Next, it is confirmed whether or not the breeding zone Bz is specified (step S204). When the breeding zone Bz is specified (Y branch in step S204), the process is moved to step S250.

If the breeding zone Bz is not specified (N branch in step S204), the heat exchanger 14 (used device) used in the heat exchanger 14 and the operation pattern P14 for selecting continuous operation or intermittent operation are required. (Step S206). It is assumed that this is also given to the control device 30 in advance by a table or the like. Alternatively, it may be calculated by a mathematical formula. When the minimum ventilation volume Ae is smaller than the minimum ventilation volume capacity of the heat exchanger 14 to be used, the operation pattern P14 is intermittent operation, and in other cases, continuous operation is performed. This process may be performed by the controlled ventilation volume determination unit 30B.

When the heat exchanger 14 to be used and the operation pattern P14 are determined, an instruction is given to the corresponding heat exchanger 14. This instruction may be given by the heat exchanger control unit 30D. Upon receiving the instruction, the heat exchanger 14 (corresponding device) is started (step S208).

The process when the breeding zone Bz is specified (Y branch in step S204) will be described. The designation of the breeding zone Bz means that the floor surface 2 of the poultry house 1 is divided into a plurality of sections, and only a part of the breeding zone Bz is used. The designation of the breeding zone Bz is notified to the control device 30 by inputting to the input device 31 to that effect when the chick entry date and the breeding zone Bz are changed. In the flow of FIG. 4, it can be performed at the initial setting of step S102 or the timer start part of step S106.

The control device 30 operates the heat exchanger 14 associated with the designated breeding zone Bz. When the camera 22 is set in the poultry house 1, if there is an instruction to use the breeding zone Bz, the control device 30 detects the currently used breeding zone Bz by looking at the image of the camera 22. To do. FIG. 6 shows a flow when the camera 22 is used. If the specific location of the breeding zone Bz is specified, it is sufficient to skip to step S254.

Specifically, by copying the images of the breeding zone Bz at different times (step S250) and comparing them, it is possible to determine which breeding zone Bz is used (step S252). Of course, the breeding zone Bz is discriminated by image analysis other than this, and the detection is completed. Such processing can be performed by the breeding zone determination unit 30C.

After the breeding zone Bz is determined, the heat exchanger 14 to be used and the operation pattern P14 are determined (step S254). After that, the corresponding heat exchanger 14 is instructed (step S256).

When the operation of the heat exchanger 14 is started, the maximum ventilation volume 14Max of the heat exchanger 14 and the minimum ventilation volume Ae are compared (step S210). When the maximum ventilation volume 14Max is equal to or higher than the minimum ventilation volume Ae (Y branch in step S210), the process is transferred to step S118 in FIG. This is because it can be determined that the minimum ventilation is achieved only by the ventilation by the heat exchanger 14.

When the maximum ventilation volume 14Max is smaller than the minimum ventilation volume Ae (N branch in step S210), one of the factors in the environmental index Ev is equal to or higher than the permissible value, and the heat exchanger 14 cannot completely ventilate. Is shown. Therefore, ventilation is performed using the ventilation fan 12 with a door and the shutter 13, the side wall inlet 40, and the ceiling inlet 42 so that the temperature inside the poultry house 1 does not fall below a predetermined value.

That is, when the ventilation volume by the heat exchanger 14 does not reach the predetermined amount (minimum ventilation volume Ae) determined based on the value from the environmental meter 20 (environmental index Ev), the ventilation by the heat exchanger 14 is performed. Ventilation is performed by the ventilation fan 12 with a door. Further, it can be said that this predetermined amount is determined based on the age of the chicken. This is because the minimum ventilation volume Ae is determined based on the age of the chicken.

Therefore, first, it is measured whether or not the temperature Ti in the building is higher than Tc−ΔTe (step S212). When the temperature inside the building Ti is higher than Tc−ΔTe (Y branch in step S212), the shutter 13 is opened and the ventilation fan 12 with a door is operated to ventilate (step S214).

When the temperature inside the building Ti is lower than Tc−ΔTe (N branch in step S212), the shutter 13 and the ventilation fan 12 with a door are closed (step S216). At this time, it is preferable to operate the heater 10 or increase the heating capacity to raise the temperature in the poultry house 1. Here, ΔTe is a value smaller than ΔT1. During the operation of the heat exchanger 14, the outside air temperature To is lower than the house temperature Ti in the poultry house 1. Therefore, when cold air is introduced into the poultry house 1, the temperature Ti inside the poultry house 1 is prevented from becoming lower than Tc−ΔT1.

Since the ventilation fan 12 with a door and the shutter 13 are arranged at corresponding positions, the ventilation by the ventilation fan 12 with a door is a tunnel exhaust when viewed from the poultry house 1. Therefore, the air flow is close to the laminar flow from the end wall 4b to the end wall 4a. This tunnel ventilation is suitable for chickens aged 6 to 7 weeks or older after molting, which require a decrease in body temperature during heat. The ventilation fan 12 with a door and the shutter 13 are arranged at a position higher than the floor surface 2 by a height of 3 hours (see FIG. 2). If the height of 3h is set higher than that of younger chicks, younger chicks will not be directly exposed to cold air.

Further, in the case of young chicks, ventilation up to about 3 to 5 weeks of age (before molting) should be performed only from the ceiling inlet 42 or the side wall inlet 40 above the side walls 3a and 3b. This is because the chicks are not exposed to cold air directly. In addition, the environmental index Ev rarely deteriorates when the age is young. In order not to use the ventilation fan 12 with a door while the age is young, it can be realized by making it possible to set the minimum ventilation amount Ae determined based on the age to a small value.

Further, as shown in FIG. 1, if the ventilation fan 12 with a door and the shutter 13 are arranged in two or more stages, the ventilation fan 12 with a door and the shutter 13 are not opened at once to ventilate. Ventilation may be performed by opening only the part. For example, if the amount of ammonia exceeds the permissible amount, the ventilation fan 12 and the shutter 13 with a door at the upper part, or the side wall inlet 40 and the ceiling inlet 42 may be opened for ventilation.

In the flow shown above, by changing the minimum ventilation volume Ae from the environmental index Ev via the correction value Ad, the ventilation operation by the ventilation fan 12 with the door and the shutter 13, or the side wall inlet 40 or the ceiling inlet 42 is performed. Although it is controlled, when each item becomes higher than the permissible value, ventilation may be performed by the ventilation fan 12 with a door and the shutter 13, or the side wall inlet 40 or the ceiling inlet 42. This is because the control device 30 is connected to the carbon dioxide meter 20a, the carbon monoxide meter 20b, the ammonia meter 20c, and the dust meter 20d, and the respective values can be directly known. Further, here, as the environmental index Ev, carbon dioxide, carbon monoxide, ammonia, and the amount of dust are taken as examples, but the environmental index Ev may include other items.

Further, with reference to FIG. 4 again, in FIG. 6, the process (step S112) when the heat exchanger 14 is operated has been described. In particular, when the environmental index Ev becomes high during the operation of the heat exchanger 14 and the minimum ventilation volume Ae becomes larger than the maximum ventilation volume 14Max of the heat exchanger 14, the ventilation fan 12 with a door and the shutter 13 or the side wall inlet 40 And the process of operating the ceiling inlet 42 to perform ventilation has been described.

On the other hand, when the outside air temperature To is high and ventilation is performed by the ventilation fan 12 with a door and the shutter 13 (step S116), and the environmental index Ev is high, the ventilation volume is increased by increasing the rotation speed of the ventilation fan 12 with a door. To increase. When the environmental index Ev becomes high in step S112 and step S116, a warning may be displayed on the display device 32.

FIG. 7 shows the floor surface 2 of the poultry house 1 divided into the breeding zone Bz. It is assumed that there are four breeding zones Bz now, and the third zone from the left is used. The control device 30 (omitted in FIG. 7) is instructed in advance in this zone, or knows through image analysis of the camera 22 that breeding is being performed in this zone.

Then, an operation instruction is given to 4 sets of 8 heat exchangers 14 that can cover the third zone. In this way, only the breeding zone Bz is ventilated and the entire poultry house 1 is not ventilated, so that unnecessary power consumption can be suppressed. When the minimum ventilation volume Ae is lower than the minimum ventilation volume of the four sets of eight heat exchangers 14, the uniformity of ventilation in the breeding zone Bz is ensured by operating each heat exchanger 14 in order.

For example, in FIG. 7, eight heat exchangers 14 are designated by reference numerals 1 to 8. Then, the heat exchangers 14 are operated in the order of the reference numerals, and when one unit is operating, the other heat exchangers 14 are stopped. Of course, intermittent operation may be performed on all the applicable heat exchangers 14.

By operating the heat exchanger 14 intermittently in this way, ventilation in the breeding zone Bz can be performed uniformly, and the filter of the inside air suction port 14oi of the heat exchanger 14 and the heat exchange element 14a (see FIG. 2). The degree of dirtiness can be made constant for each heat exchanger 14.

As described above, the control device for the ventilation system of the poultry house according to the present invention can perform temperature control and ventilation control according to the number of breeding days in the poultry house, suppress unnecessary power consumption, and perform energy-saving operation. ..

The control device for the ventilation system of the poultry house according to the present invention can be suitably used for the poultry house in which the broiler is bred.

1 Chicken house 2 Floor Bz Breeding zone 3a, 3b Side wall 3ai, 3bi Inner side wall 3ao, 3bo Outer side wall 3L Distance between side wall 3a and 3b 3h Predetermined height 4a, 4b Wife wall 5 Roof 2a Floor surface 2 Center line 10 Heater 10a Spacing between each heater 10 12 Ventilation fan with door 12a Air guide fan 13, 13a Shutter 14 Heat exchanger 14a Heat exchange element 14o Exhaust system air passage 14i Air supply system air passage 14oi Inside air suction port 14oo Inside air exhaust port 14of Fan 14ii Outside air suction port 14io Outside air outlet 14if Fan P14 Heat exchanger 14 operation pattern 14Max Maximum ventilation volume 16a Outside air thermometer 16b Outside air humidity meter 18a Building thermometer 18b Building humidity meter 20 Environmental meter (Carbon dioxide meter 20a, carbon monoxide meter 20b, ammonia meter 20c, dust meter 20d)
Ev Environmental index 22 Camera 30 Control device 30m Memory 30T Timer 30A Control temperature determination unit 30B Control ventilation volume determination unit 30C Breeding zone determination unit 30D Heat exchanger control unit 30E Age determination unit 30F Outside air temperature detection unit 31 Input device 32 Display device 40 Side wall inlet 42 Ceiling inlet Tc Control temperature Hc Control humidity ΔT1 Lower limit temperature control width ΔT2 Upper limit temperature control width Ae Minimum ventilation Ad Environmental index Ev correction value Mp Control parameter To Outside air temperature Ti Building temperature Md Control date Rd Current Age RE Expected shipping date

Claims (7)

With a rectangular floor
The side wall provided on the long side of the rectangle and
The gable wall provided on the short side of the rectangle and
A building composed of a roof covering the floor surface and
A plurality of heaters arranged in the longitudinal direction between the side walls, and
Of the wife walls, a ventilation fan with a door placed on one of the wife walls,
Of the wife walls, a shutter arranged on the other wife wall or the side wall near the wife wall,
The heat exchanger provided on the side wall and
With the environmental meter placed inside the building,
A control device for a ventilation system in a poultry house equipped with an outside air thermometer located outside the building.
At least connected to the environmental meter and the outside air thermometer,
Control the operation of the heat exchanger and the ventilation fan with a door,
A control device for a ventilation system in a poultry house that operates a ventilation fan with a door when the ventilation volume by the heat exchanger does not reach a predetermined amount determined based on a value from the environment measuring meter. The control device for the ventilation system of the poultry house according to claim 1, wherein the predetermined amount is determined based on the age of the chicken to be bred in addition to the value from the environmental measuring meter. The control device for a ventilation system of a poultry house according to claim 1 or 2, wherein a side wall inlet is provided on the upper part of the side wall and a ceiling inlet is provided on the roof. It has a control temperature determination unit that determines the control temperature based on the age of the broiler.
When the outside air temperature is ΔT1 ° C lower than the control temperature, the heat exchanger is operated.
The control device for a ventilation system in a poultry house according to any one of claims 1 to 3, wherein the heat exchanger is stopped when the outside air temperature becomes ΔT2 ° C. higher than the control temperature. The ΔT1 is set to a large value according to the age of the broiler.
The control device for the ventilation system of the poultry house according to any one of claims 1 to 4, wherein the ΔT2 is set to a small value according to the age of the broiler. The poultry house is divided into multiple breeding zones
The control device for a poultry house ventilation system according to any one of claims 1 to 5, which activates the heat exchanger associated with the breeding zone. The poultry house is further equipped with a camera to monitor the breeding zone.
It also has a breeding zone determination unit that determines the breeding zone currently in use from the image of the camera.
The control device for a poultry house ventilation system according to claim 6, wherein the heat exchanger associated with the currently used breeding zone detected by the breeding zone determination unit is operated.

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