CN104145826B - A kind of automatic control system of poultry house Wet-curtain temperature reducing in summer and control method thereof - Google Patents
A kind of automatic control system of poultry house Wet-curtain temperature reducing in summer and control method thereof Download PDFInfo
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Abstract
The present invention relates to cooling system technical field, particularly a kind of automatic control system of poultry house Wet-curtain temperature reducing in summer and control method thereof.The object of the present invention is to provide and a kind ofly can realize automatic control system and the control method thereof that pad and fan cooling system controls the poultry house Wet-curtain temperature reducing in summer of temperature in poultry house automatically.When utilizing the cooling system of the present invention to existing poultry house to transform, only need the position and the adjustment control system that increase or change sensor, and do not need to transform poultry house main-body structure, improvement cost is low, and replicability is large.
Description
Technical field
The present invention relates to cooling system technical field, particularly a kind of automatic control system of poultry house Wet-curtain temperature reducing in summer and control method thereof.
Background technology
China's summer general high temperature, especially the Changjiang river areas to the south continue hot and humid, very large impact is caused on China's confined farming industry.In house, high temperature can make animal produce heat stress, heat stress can change various physiology, the biochemical reaction of animal, and then cause that livestock and poultry feed intake declines, productivity reduces, degradation serious problems under premunition, because having report when heat stress causes livestock and poultry event dead in batch also.House humidity is excessive, can increase the weight of the heat stress of animal.How overcoming the puzzlement that high temperature brings, unfavorable factor is reduced to bottom line, is the major issue that Production of Livestock and Poultry person needs to solve.
Pad and fan cooling system is current most popular a kind of environment controlling technique for extenuating drylot feeding in summer fowl and animal thermal stress.When outside air is by wetting wet curtain paper, moisture evaporates in atmosphere, from air, absorb evaporation latent heat, and air themperature is reduced.This technology is made up of negative-pressure air fan, wet curtain paper, Water Pump Circulation System and control device etc.
Traditional " on-off " pattern is the control mode that China uses the most general wet curtain evaporative cooling at present, namely when in giving up, temperature acquires a certain degree, when manager thinks that temperature is too high in poultry house, manual unlocking water pump, water is transported to the top of wet curtain paper by water pump, and then wetting wet curtain paper, system starts to lower the temperature in house.To house in afternoon outer temperature dropped to a certain extent time, manager think the unnecessary heat discharge that only just chicken group in house need can be produced by ventilating and do not need Wet-curtain temperature reducing time, just manually turn off water pump.Some animal or fowls farm are installing timer for the water pump place of water on wet curtain paper, timer can automatically be opened according to presetting the time or switch off the pump, such as timer is preset as every morning 10 unlatching water pumps, at 6 in afternoon is when turning off water pump, no matter how how outside air temperature changes, and water pump all opens and closes according to this Preset Time.There is following problem in the control mode of this simple " on-off ": when 1. adopting this control mode, and water pump just no longer stops once startup, and wet curtain paper is no longer entirely wetted soon, and in house, temperature reduces rapidly.Research shows, in xeothermic area, in wet curtain cooling system initial start stage, in house, temperature exists rapid drawdown, even 15 DEG C up to more than 10 DEG C, some areas.Research shows, this temperature decrease causes adverse effect to livestock birds health, and the livestock and poultry especially near wet curtain are easy to occur the respiratory diseases such as flu.2. manually opened or close wet curtain, general be all manager is basis for estimation according to the sensation of self or experience, people feels the sensation being different from animal, also very big-difference is there is between the sensation of different people, therefore, this control mode has very large aesthetic and random, is difficult to the environment that animal provides relatively stable and comfortable.3. the drencher system of timer switch is adopted, the relatively artificial drencher system opened or close, there is certain automaticity, but the temperature Change of every day is all different, when unhappy heat on the same day, still be in higher temperature in house before cascade may be caused to open or after closing, make animal be in more serious heat stress state.4. adopt the wet curtain cooling system that this " on-off " controls, in running, water pump one direct-open, continues ceaselessly to supply water to wet curtain paper, and this can cause house humidity very large.When weather is sultryyer, larger house humidity is unfavorable, if animal is by the water evaporation heat radiation in skin or respiratory tract, and then can increase the weight of the heat stress of animal, produce harmful effect to animal.5. the wet curtain cooling system that this " on-off " controls is adopted, cooling system is once start, cooling degree will not be subject to manual control, and by the same day air wet-bulb temperature and wet curtain cooling system cooling efficiency determine, therefore, can not adjust according to the temperature required of growth of animal, therefore, be difficult to the Precise control realizing environment.6. adopt in this way, be difficult to the automation and the control in real time that realize environment.
In recent years, China introduced also independent research poultry house automated environment control system from external successively.The mode generally adopted arranges Temperature Humidity Sensor (house is interior, house is outer) in systems in which, temperature in production needed for reality can be set as target temperature by feeding and management person, when in giving up, temperature exceedes target temperature, system starts the wetting wet curtain of water pump automatically, and in house, temperature starts to decline.When giving up temperature lower than target temperature, water pump stops upper water, gives up warm bottom out, and when giving up temperature and reaching target temperature, water pump starts again, and in house, temperature starts again to decline.So repeatedly, temperature surrounding target temperature in house is fluctuated up and down.Compared with " on-off " control model, this mode has lot of advantages, be mainly manifested in: 1. house in Temperature Humidity Sensor can Real-time Collection house in temperature, humidity, and feed back to control computer, computer is according to temperature, humidity conditions current in house, and then control the duty of water pump and blower fan, thus the temperature surrounding target temperature in house is fluctuated up and down.Therefore, the producer can according to oneself need set target temperature, thus the temperature in house is controlled near this target temperature.2. the temperature decrease problem that the wet curtain initial operating stage that this control mode well solves " on-off " control mode produces, has ensured livestock birds health effectively.3. the unlatching quantity of blower fan can be adjusted in real time according to temperature in house.4. energy-saving and water-saving.5. automaticity is high, can realize the Precise control giving up environment.But this control mode also exists a lot of drawback, is mainly manifested in: 1. system runs program is very complicated, if do not make the relation between each parameter clear, be difficult to the good operation of the system that realizes.2. much important parameter needs manager oneself input system, and these parameters input is whether reasonable, directly affects the operational effect of system.To be set as example the circulation timei that water pump opens and closes, if the setting of water pump opening time is too short, wet curtain wetting areas is little, is difficult to reach target temperature in house.On the contrary, the water pump opening time is long, may cause wet curtain initial operating stage temperature decrease or the excessive equitemperature of house humidity, all can produce harmful effect to animal.Even if the opening time setting of water pump better, the time that water pump cuts out also can cause certain influence to the operational effect of system.Such as water pump time of closing can cause water pump frequent starting time shorter, and may cause giving up interior temperature when closing long and can not drop to temperature required.And different water pump opens and closes the actual cooling-down effect that can reach aborning of circulating and is given up outer temp. and humidity and house inner blower unlatching quantity etc. and affect.The number needs of 3. opening in different temperatures section and time period blower fan wants production manager oneself to set, fan operating numbers is few, can cause giving up the high or large equitemperature of the head and the tail temperature difference of interior temperature, and fan operating numbers is too much, not only waste of energy can be caused, the wind speed that also can result through wet curtain paper is excessive, and the upper water of air and wet curtain paper can not carry out sufficient exchange heat, and then affects the cooling-down effect of wet curtain cooling system.4. this control system is that this temperature adjusting mode will inevitably cause a part of animal to be in heat stress state by the target temperature of the mean temperature in house as cooling.When 5. adopting this control mode, sensor the operational effect of setting position on system should have significant impact, such as suppose that sensing station arranges the mean temperature that the unreasonable temp. and humidity causing it to gather can not represent She Nei reality, this will have influence on the operational effect of whole system.And the length of different poultry house, width, highly all different, the position of sensor settings is also inevitable different, how to find out rational installation site, is a very difficult thing.
Be engraved in change during external environment, also may not just house environment can be controlled in good scope even if Production of Livestock and Poultry manager possesses good environmental Kuznets Curves quality.In addition, China's north-south climate difference is large, and personnel environment's control technology and the knowledge thereof of being engaged in related work lack relatively, and feeding environment control technology has become a large bottleneck of restriction China scale its feeding.
Summary of the invention
For above problem, the object of the present invention is to provide and a kind ofly can realize automatic control system and the control method thereof that pad and fan cooling system controls the poultry house Wet-curtain temperature reducing in summer of temperature in poultry house automatically.
In order to achieve the above object, the invention provides following technical scheme:
An automatic control system for poultry house Wet-curtain temperature reducing in summer, wherein,
Described poultry house transversely the side body of wall in direction and coupled a part of body of wall along the longitudinal direction arranges multiple wet curtain paper 1; Opposite side body of wall on the other side is provided with multiple stage negative-pressure air fan 4; Described wet curtain paper 1 is connected with wet curtain water-feeding system, and described wet curtain water-feeding system comprises water pump 2, circulating water pool 3 and upper hose;
Multiple row cage tool is longitudinally set in poultry house, between adjacent two row cage tools, passage is set; In every row cage tool, arrange many group cage tools, wherein frame 5 headed by first group of cage tool of air inlet one end, last group cage tool is tailstock 6; In poultry house house, wetting arranges deflector 7 between curtain 1 and first frame 5, and controller 8 is arranged in the workplace outside poultry house;
First Temperature Humidity Sensor 9 is set outside poultry house, multiple second Temperature Humidity Sensor 10 is set in multiple first frame 5 position, multiple 3rd Temperature Humidity Sensor 11 is set in multiple tailstock 6 position;
Described first Temperature Humidity Sensor 9, second Temperature Humidity Sensor 10 is connected with controller 8 respectively with the 3rd Temperature Humidity Sensor 11.
Be outside equipped with baroceptor 12 at described poultry house, baroceptor 12 is connected with controller 8.
The opening angle of described deflector 7 can adjust.
A control method for the automatic control system of poultry house Wet-curtain temperature reducing in summer, it comprises the following steps:
1) feeding environment temperature T in suitable house is selected according to the kind and age in days of giving up interior domesticated animal
a;
2) according to determined temperature T
a, determine the control model of pad and fan cooling system;
As t > T
aduring+Δ t, wet curtain control model that system enters " on-off "; As t≤T
aduring+Δ t, system enters batch (-type) and to wet curtain control model;
Wherein, t is the temperature that the air calculated enters poultry house after Wet-curtain temperature reducing, and unit is DEG C; Δ t is the difference that after air enters poultry house after Wet-curtain temperature reducing, accessible actual temperature and air enter the temperature of poultry house after Wet-curtain temperature reducing, and unit is DEG C;
3) when system is in " on-off " wet curtain control model:
The water pump 2 started ceaselessly operates, and wets under curtain control model until be switched to batch (-type);
4) when system be in batch (-type) wet curtain control model time:
1. by the temperature T of the first frame 5 of the second Temperature Humidity Sensor 10 Real-time Collection
1and relative moisture
when multiple second Temperature Humidity Sensor 10 installed by first frame 5, get minimum of a value as regulation and control parameter; By the temperature T of the 3rd Temperature Humidity Sensor 11 Real-time Collection tailstock 6
endand relative moisture
when multiple 3rd Temperature Humidity Sensor 11 installed by tailstock 6, get maximum as regulation and control parameter, Δ T is the temperature T at tailstock 6 place
endwith the temperature T at first frame 5 place
1difference, i.e. the temperature difference of first frame 5 and tailstock 6:
Δ T=T
end-T
1;
2. T is worked as
1≤ T
aduring-Δ T, maintain water pump 2 opening time; Work as T
1> T
aduring-Δ T, increase water pump 2 opening time, shorten water pump 2 shut-in time; When water pump 2 shut-in time shortens to 1 minute, if when water pump 2 each circulating close-open time starts, wet curtain control model that system enters automatically " on-off ";
3. T is worked as
end> T
atime, increase blower fan 4 and open quantity; Work as T
end≤ T
atime, it is constant that quantity opened by maintenance blower fan 4.
In described step 2) in,
Wherein, n is 0.65 ~ 0.75; T
dfor giving up outer temperature, by the first Temperature Humidity Sensor 9 Real-time Collection, unit is DEG C;
for the wet-bulb temperature outside the poultry house of real atmosphere pressure, unit is DEG C;
Wherein,
In formula, T
wfor the wet-bulb temperature outside normal atmosphere pressure poultry house, unit is DEG C;
for relative moisture, by the first Temperature Humidity Sensor 9 Real-time Collection, put expression decimally; Δ P is the difference of standard atmospheric pressure and real atmosphere pressure; Standard atmospheric pressure selects 101325Pa, Δ P=101325-real atmosphere pressure, and real atmosphere pressure is by baroceptor 12 Real-time Collection, and unit is Pa;
Wherein,
Compared with prior art, beneficial effect of the present invention is:
The present invention's curtain control model that wet to traditional " on-off " curtain control model and batch (-type) wet combines effectively, and the temperature environment needed for external environment and livestock and poultry realizes the conversion of two kinds of patterns automatically, and then realize pad and fan cooling system automatic control temperature; According to livestock and poultry Different growth phases in poultry house, the production preference temperature T of respective stage can be determined
a, and maximum temperature in house is no more than T
aas goal of regulation and control temperature, change traditional to give up the way of interior mean temperature as goal of regulation and control temperature, thus ensure that in poultry house, all animals are all in the temperature range of relative comfort; Achieve the Automated condtrol of fan operation quantity, efficiently avoid current batch (-type) and to wet the setting of rank of ventilating in curtain regulation and control; When utilizing the cooling system of the present invention to existing poultry house to transform, only need the position and the adjustment control system that increase or change sensor, and do not need to transform poultry house main-body structure, improvement cost is low, and replicability is large.
Accompanying drawing explanation
Fig. 1 is that the system component of the automatic control system of poultry house Wet-curtain temperature reducing in summer of the present invention arranges schematic diagram;
Fig. 2 is that in poultry house, ventilation is that notch cuttype increases schematic diagram with common fan operating numbers;
Fig. 3 is that frequency conversion fan linearly increases schematic diagram in conjunction with rear venting amount with fan operating numbers with common blower fan;
Fig. 4 is control model schematic diagram of the present invention.
[primary clustering symbol description]
1 wet curtain paper
2 water pumps
3 circulating water pools
4 negative-pressure air fans
5 first framves
6 tailstocks
7 deflectors
8 controllers
9 first Temperature Humidity Sensors
10 second Temperature Humidity Sensors
11 the 3rd Temperature Humidity Sensors
12 baroceptors
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in detail.
As shown in Figure 1, be the module position schematic diagram of automatic control system of poultry house Wet-curtain temperature reducing in summer of the present invention.
The automatic control system of a kind of poultry house Wet-curtain temperature reducing in summer of the present invention, wherein, poultry house transversely the side body of wall in direction and coupled a part of body of wall along the longitudinal direction arranges multiple wet curtain paper 1, as the air inlet of closed poultry house.Wet curtain paper 1 is connected with wet curtain water-feeding system, and described wet curtain water-feeding system comprises water pump 2, circulating water pool 3 and upper hose (not marking in figure); The opposite side body of wall in poultry house transversely direction is provided with multiple stage negative-pressure air fan 4, as closed poultry house exhaust outlet; The cage tool of multiple row for letting animals feed is longitudinally set in poultry house, the passage for poultry raiser's management and work is set between adjacent two row cage tools.In every row cage tool, arrange many group cage tools, be called first frame 5 at first group of cage tool near air inlet one end, last group cage tool is called tailstock 6; In poultry house house, wetting arranges deflector 7 between curtain 1 and first frame 5, and the opening angle of deflector 7 can adjust, and by adjusting the angular dimension of the unlatching of deflector 7, and then can adjust the wind speed entered in poultry house; Controller 8 is arranged in the workplace outside poultry house.
First Temperature Humidity Sensor 9 is set outside poultry house, multiple second Temperature Humidity Sensor 10 is set in multiple first frame 5 position, multiple 3rd Temperature Humidity Sensor 11 is set in multiple tailstock 6 position; First Temperature Humidity Sensor 9, second Temperature Humidity Sensor 10 is connected with controller 8 respectively with the 3rd Temperature Humidity Sensor 11.Alternatively, also can be provided with baroceptor 12, baroceptor 12 is connected with controller 8.
Wherein, the first Temperature Humidity Sensor 9 is by the temperature T outside Real-time Collection poultry house
d(dry-bulb temperature) and relative moisture
baroceptor 12 is by the air pressure P outside Real-time Collection poultry house, and the second Temperature Humidity Sensor 10 is by the temperature T at frame 5 place first in Real-time Collection poultry house
1and relative moisture
3rd Temperature Humidity Sensor 11 is by the temperature T at tailstock 6 place in Real-time Collection poultry house
endand relative moisture
the data obtained sends controller 8 to.
The control method of the automatic control system of a kind of poultry house Wet-curtain temperature reducing in summer of the present invention, it comprises the following steps:
1) feeding environment temperature T in suitable house is selected according to the kind and age in days of giving up interior domesticated animal
a.
The livestock and poultry of large-scale breeding are all homeothermal animals, and in certain ambient temperature range, livestock and poultry can maintain thermostasis, and this temperature range is referred to as thermostasis district.Once environmental temperature is higher than this temperature, the body temperature of animal just starts to rise, and shows as that appetite declines, respiratory rate increases, digestive function goes down, and then can cause that physique weakens, productivity declines, even can heat dead.Such as, when temperature is more than 23 DEG C, the egg production of chicken starts to decline, and egg diminishes, and eggshell is also thinning.Chicken increases weight and slows down to some extent 27 DEG C time, and 38 DEG C time, weightening finish stops substantially.When temperature is increased to 20 DEG C, namely the milk yield of milk cow declines to some extent, and when being raised to 30 DEG C, the milk yield of milk cow significantly declines; During more than 35 DEG C, the milk yield of milk cow sharply declines.When temperature is more than 20 DEG C, the daily gain in pigs of various body weight all obviously declines, and during more than 30 DEG C, is all down to very low level.
Same kind animal is also different to the requirement of temperature at Different growth phases.Nascent animal thermal conditioning function is not also fully formed, and body temperature is large with the change of environmental temperature, compared with adults, requires that environmental temperature is higher.
At present, the comparatively adapt circumstance temperature of various animal Different growth phases is clearer and more definite, in native system, only need manager according to actual management requirement, relevant position in the environmental temperature input control program corresponding to each vegetative stage animal, the vegetative stage according to animal is adjusted T by system automatically
a.
2) according to determined temperature T
a, determine the control model of pad and fan cooling system
1. outdoor temperature T is gathered
d, relative moisture
and atmospheric pressure P.
At outdoor mounted first temperature sensor 9 and baroceptor 12.By the temperature T outside the first Temperature Humidity Sensor 9 Real-time Collection poultry house
d, relative moisture
by baroceptor 12 Real-time Collection air pressure P, and transfer data to controller 8, system is by calculating real-time wet bulb temperature value.
2. by outdoor temperature T
d, relative moisture
and atmospheric pressure P calculates wet-bulb temperature T
w.
The method of wet-bulb temperature is not still directly calculated at present by temperature and relative moisture.The application adopts and calculates temperature outside poultry house at 5 ~ 45 DEG C, the wet-bulb temperature T of relative moisture 5% ~ 100% time by Direct Iterative Method at normal atmospheric pressure
w, and the empirical formula of wet-bulb temperature is at normal atmospheric pressure drawn by linear return two times mode, see shown in formula (1):
Wherein, T
wunit be DEG C; T
dfor the temperature outside house, unit is DEG C;
for the relative moisture outside poultry house, decimal point in formula, is selected to represent, e.g., when relative moisture is 50%,
at normal atmospheric pressure, by wet-bulb temperature T
wthe poultry house that calculates of computing formula outside wet-bulb temperature T
werror band be-0.515 ~ 0.289 DEG C, can meet practical application produce.
In the area that height above sea level is higher, atmospheric pressure is comparatively large on the impact of wet-bulb temperature, therefore needs the wet-bulb temperature T to normal atmosphere pressure
wverify, to obtain the wet-bulb temperature of real atmosphere pressure
Wherein,
unit be DEG C; Δ T
wfor thermodynamic wet-bult temperature correction value, unit is DEG C;
for relative moisture, put expression decimally; Δ P is the difference of standard atmospheric pressure and real atmosphere pressure, and standard atmospheric pressure selects 101325Pa, Δ P=101325-real atmosphere pressure, and real atmosphere pressure is by baroceptor 12 Real-time Collection and be transferred to controller 8, and unit is Pa.
3. the air themperature t by poultry house air inlet after pad and fan cooling system is determined.
Ideally, air themperature can be dropped to the wet-bulb temperature of air by house outer air after pad and fan cooling system, that is the cooling limit of wet curtain blower fan is the wet-bulb temperature of air, therefore, air themperature after wet curtain, the closer to wet-bulb temperature, illustrates that its temperature-fall period carries out more abundant.Usual employing cooling efficiency eta is as the index of the temperature reduction performance quality of evaluation evaporative cooling technology and equipment.
Wherein, 0 < η < 1, t is air poultry house air inlet air themperature after Wet-curtain temperature reducing, and unit is DEG C.
And then the air themperature and the intake air temperature t that enter poultry house after Wet-curtain temperature reducing are:
4. the cutting temperature of " on-off " control model and batch (-type) control model is determined.
As t > T
aduring+Δ t, wet curtain control model that system enters " on-off ".As t≤T
aduring+Δ t, system enters batch (-type) and to wet curtain control model.
Test proves, in the xeothermic area of China, when the mistake curtain wind speed in pad and fan cooling system is at 1.0 ~ 1.5m/s, the cooling efficiency of pad and fan cooling system is about 0.8, and bringing formula (5) into can obtain:
When the cooling efficiency of wet curtain reaches n (wherein, n is 0.65 ~ 0.75), can calculate according to formula (5) the accessible actual temperature t that now air enters poultry house after Wet-curtain temperature reducing
*, be expressed as:
3) when system is in traditional " on-off " wet curtain control model:
Water pump 2, once start and will ceaselessly operate, wets under curtain control model until be switched to batch (-type).
When adopting traditional " on-off " wet curtain control model, water pump 2 is once start, and wet curtain paper will be no longer entirely wetted, and in house, temperature declines rapidly, and system will reach the cooling-down effect of the best.When adopting this pattern, except wet curtain cooling system impact itself, the temperature that in house, reality can reach, by giving up outer dry-bulb temperature and relative moisture decision, is no longer subject to manual control.
4) when system be in described batch (-type) wet curtain control model time:
As shown in Figure 4, wet time, blower fan 4 that curtain control model mainly opened and closed by adjustment water pump 2 of batch (-type) is opened quantity to carry out and is controlled.When adopting longitudinal ventilation in poultry house, before and after General Requirements house, the temperature difference is not more than 2 DEG C.In " wet curtain-blower fan " longitudinal exhausting system, in house, temperature is generally raised to tailstock 6 gradually by first frame 5, and therefore, be generally minimum temperature in house and appear at first frame 5 place, the maximum temperature in house then appears at tailstock 6 place.And the temperature of same position also there are differences between different lines, general wind speed in the aisle of body of wall is minimum, and temperature is higher than other aisle.Therefore, in order to realize more finely controlling, the present embodiment suggestion only should not arrange a Temperature Humidity Sensor at first frame 5 or tailstock 6 place.
In order to ensure that animals all in poultry house is all in comparatively suitable temperature range, adopting in the present embodiment and requiring that in house, maximum temperature is no more than T
a.
1. by the dry-bulb temperature T of the first frame 5 of the second Temperature Humidity Sensor 10 Real-time Collection
1and relative moisture
when multiple second Temperature Humidity Sensor 10 installed by first frame 5, get minimum of a value as regulation and control parameter.By the dry-bulb temperature T of the 3rd Temperature Humidity Sensor 11 Real-time Collection tailstock 6
endand relative moisture
when multiple 3rd Temperature Humidity Sensor 11 installed by tailstock 6, get maximum as regulation and control parameter.Δ T is the temperature T at tailstock 6 place
endwith the temperature T at first frame 5 place
1difference, i.e. the temperature difference of first frame 5 and tailstock 6:
Δ T=T
end-T
1(8)
Δ T is as a variable parameter, and in actual applications, manager according to the needs of oneself, can input Δ T, and system will carry out corresponding environment conditioning mode according to this input value.Δ T=2 DEG C is given tacit consent in system.
2. T is worked as
1≤ T
aduring-Δ T, maintain water pump 2 opening time; Work as T
1> T
aduring-Δ T, increase water pump 2 opening time, shorten water pump 2 shut-in time.When water pump 2 shut-in time shortens to 1 minute, if when water pump 2 each circulating close-open time starts, wet curtain control model that system enters automatically " on-off ".
3. T is worked as
end> T
atime, increase blower fan 4 and open quantity, to increase the wind speed in house, increase ventilation, thus reduce the temperature T at tailstock 6 place
end.Work as T
end≤ T
atime, maintain the ventilation of blower fan 4.
At present, poultry house is when longitudinal ventilation, and the common blower fan of multiple stage that adopts as exhaust outlet more.The number of units of opening by increasing blower fan increases the ventilation in house, and ventilation opens the stepped increase mode of increase of number of units with blower fan, as shown in Figure 2.In the application, by frequency conversion fan and different blower fan efficient combination, total ventilation is made in house linearly to change along with the increase of the unlatching quantity of blower fan, as shown in Figure 3.The introduction of frequency conversion fan, effectively can realize the regulation and control that become more meticulous of ventilating.
Claims (2)
1. the control method of the automatic control system of a poultry house Wet-curtain temperature reducing in summer, wherein, in described automatic control system, poultry house transversely the side body of wall in direction and coupled a part of body of wall along the longitudinal direction arranges multiple wet curtain paper (1); Opposite side body of wall on the other side is provided with multiple stage negative-pressure air fan (4); Described wet curtain paper (1) is connected with wet curtain water-feeding system, and described wet curtain water-feeding system comprises water pump (2), circulating water pool (3) and upper hose;
Multiple row cage tool is longitudinally set in poultry house, between adjacent two row cage tools, passage is set; In every row cage tool, arrange many group cage tools, wherein frame (5) headed by first group of cage tool of air inlet one end, last group cage tool is tailstock (6); In poultry house house, wetting arranges deflector (7) between curtain paper (1) and first frame (5), and controller (8) is arranged in the workplace outside poultry house;
First Temperature Humidity Sensor (9) is set outside poultry house, multiple second Temperature Humidity Sensor (10) is set in multiple first frame (5) position, multiple 3rd Temperature Humidity Sensor (11) is set in multiple tailstock (6) position;
Described first Temperature Humidity Sensor (9), the second Temperature Humidity Sensor (10) are connected with controller (8) respectively with the 3rd Temperature Humidity Sensor (11);
It is characterized in that:
The control method of described automatic control system, comprises the following steps:
1) feeding environment temperature T in suitable house is selected according to the kind and age in days of giving up interior domesticated animal
a;
2) according to determined temperature T
a, determine the control model of pad and fan cooling system;
As t > T
aduring+△ t, wet curtain control model that system enters " on-off "; As t≤T
aduring+△ t, system enters batch (-type) and to wet curtain control model;
Wherein, t is the temperature that the air calculated enters poultry house after Wet-curtain temperature reducing, and unit is DEG C; △ t is the difference that after air enters poultry house after Wet-curtain temperature reducing, accessible actual temperature and air enter the temperature of poultry house after Wet-curtain temperature reducing, and unit is DEG C;
3) when system is in " on-off " wet curtain control model:
The water pump (2) started ceaselessly operates, and wets under curtain control model until be switched to batch (-type);
4) when system be in batch (-type) wet curtain control model time:
1. by the temperature T of the first frame of the second Temperature Humidity Sensor (10) Real-time Collection (5)
1and relative moisture
when first frame (5) installs multiple second Temperature Humidity Sensor (10), get minimum of a value as regulation and control parameter; By the temperature T of the 3rd Temperature Humidity Sensor (11) Real-time Collection tailstock (6)
endand relative moisture
when tailstock (6) installs multiple 3rd Temperature Humidity Sensor (11), get maximum as regulation and control parameter, △ T is the temperature T at tailstock (6) place
endwith the temperature T at first frame (5) place
1difference, i.e. the temperature difference of first frame (5) and tailstock (6):
△ T=T
end-T
1;
2. T is worked as
1≤ T
aduring-△ T, maintain water pump (2) opening time; Work as T
1> T
aduring-△ T, increase water pump (2) opening time, shorten water pump (2) shut-in time; When water pump (2) shut-in time shortens to 1 minute, if when water pump (2) each circulating close-open time starts, wet curtain control model that system enters automatically " on-off ";
3. T is worked as
end> T
atime, increase blower fan (4) and open quantity; Work as T
end≤ T
atime, maintain blower fan (4) unlatching quantity constant.
2. the control method of the automatic control system of a kind of poultry house Wet-curtain temperature reducing in summer as claimed in claim 1, is characterized in that:
In described step 2) in,
Wherein, n is 0.65 ~ 0.75; T
dfor giving up outer temperature, by the first Temperature Humidity Sensor (9) Real-time Collection, unit is DEG C;
for the wet-bulb temperature outside the poultry house of real atmosphere pressure, unit is DEG C;
Wherein,
In formula, T
wfor the wet-bulb temperature outside normal atmosphere pressure poultry house, unit is DEG C;
for relative moisture, by the first Temperature Humidity Sensor (9) Real-time Collection, put expression decimally; Δ P is the difference of standard atmospheric pressure and real atmosphere pressure; Standard atmospheric pressure selects 101325Pa, Δ P=101325-real atmosphere pressure, and real atmosphere pressure is by baroceptor (12) Real-time Collection, and unit is Pa;
Wherein,
Priority Applications (1)
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| CN104604750B (en) * | 2015-01-28 | 2018-05-08 | 北京市华都峪口禽业有限责任公司 | Henhouse and its ensure the uniform method of henhouse summer temp |
| CN104920286A (en) * | 2015-06-02 | 2015-09-23 | 杨帆 | Dairy cow feeding method |
| CN105240975A (en) * | 2015-11-11 | 2016-01-13 | 吴江南玻玻璃有限公司 | Intelligent fan and water curtain temperature control system |
| CN112484185A (en) * | 2020-11-20 | 2021-03-12 | 珠海格力电器股份有限公司 | Photovoltaic air conditioner control method and device applied to farm and photovoltaic air conditioner |
| CN113703494B (en) * | 2021-08-25 | 2022-08-05 | 北京市华都峪口禽业有限责任公司 | Intelligent and accurate temperature control method for wet curtain |
| CN113575465B (en) * | 2021-08-27 | 2023-01-17 | 江苏深农智能科技有限公司 | Intelligent wet curtain cooling system and regulation and control method thereof |
| CN114047793B (en) * | 2021-09-26 | 2022-07-15 | 南京农业大学 | Water curtain cooling system based on swinery body surface temperature and temperature adjusting method thereof |
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