DK177106B1 - Logistically arranged housing arrangement with a ventilation duct system and method that ensures improved air quality in the housing arrangement - Google Patents

Abstract

This provides a logistically arranged barn arrangement with ventilation duct system 23 which ensures improved air quality when using a method of replacing the air in at least a part of a building, the method comprising directing a first quantity of air into the interior space of the building via at least one below the building. floor extending first conduit 23a formed with a longitudinally spaced number of first holes 30, and via at least one second conduit 23b extending below the floor of the building formed with a longitudinally spaced number of second holes 31 to direct a different amount of air out of the interior space of the building. Thus, a stable arrangement is obtained which offers increased production capacity in relation to traditional stable construction, as the animal welfare as well as the logistical arrangement and working environment in said stable arrangement are greatly improved.

Description

DK 177106 B1

'I

Method and ventilation duct system for replacing the air in at least part of a building, as well as using the same in a housing section and a housing arrangement.

The present invention relates to a method of replacing at least a portion of the air in at least a portion of a building defining, with at least one circumferential wall, roof and floor, an interior space by a first station outside the building. conducting a first amount of air into the interior space of the building via at least one first conduit extending longitudinally spaced apart from the number of first holes and at least one second conduit extending beneath the floor of the building; a longitudinally spaced number of second holes is designed to conduct a second amount of air from the interior space of the building to another station outside the building.

The present invention further relates to a housing section in the form of a building defining, with at least one circumferential wall, a roof 20 and a floor, an interior space, as well as a housing arrangement comprising at least two spaced apart housing sections, and a logistic arrangement of the housing section and the housing arrangement respectively.

The present invention also relates to a ventilation duct system for replacing at least a portion of the air in at least a portion of a building, such as a housing section.

Traditional livestock farming takes place in buildings that are dimensionally limited by conditions such as e.g. the dimensions of ventilation systems and roof structures. A stable building with a width of e.g. ca. 38 m and a length of 2 DK 177106 B1 up to several times this width. If a desired production capacity cannot be reached in a single such barn building, several barn buildings shall be placed parallel to one another, with a mutual spacing determined by 5 national and regional building regulations. In Denmark, there must be at least 10 m between two neighboring barn buildings. The parallel housing buildings are connected logistically by means of transverse passage buildings to secure and enable e.g. handling and transport of animals and raw materials 10 between the barn buildings.

Industrial pig breeding requires e.g. that the pigs move frequently. An ordinary breeding sow is moved e.g. ca. 7 times a year in connection with shifts from danger booths, insemination, pregnancy, 15 etc. Each shift exposes the pigs to stress, which propagates to the surroundings due to noise and general turmoil. When the animals are moved far and often, the level of stress increases and the turmoil increases in the barn, as is the case in the above-described building arrangements with many long, parallel 20 barn buildings. Huge resources are thus spent on moving the animals, which means that the farmer spends a considerable part of his time alone moving the animals and that the animals become extremely stressed due to the long and many migrations. Each move costs efficient revenue, with 25 stressed animal growth stalled for up to several days. Quite badly, it is for piglets up to 30 kg, whose growth can stall for up to a week. If the housing construction structures and logistics can be changed without deviating from the building regulations, in such a way that time and resources can be saved, it will simultaneously mean a significant increase in animal welfare and greatly improved work teams for the farmer.

3 DK 177106 B1

Traditionally, ventilation takes place in a building, such as a barn building, by sucking fresh air under the eaves and distributing it in a space above the ceiling, after which it is sucked down through a porous barrier to the underlying plants. This type of ventilation is often called diffuse ventilation, and is traditionally used in Denmark when operating the above-mentioned long stables with between 6 and 10 housing sections in order to obtain adequate ventilation.

10 This type of ventilation itself has many weaknesses. For example, the porous barrier is gradually clogged over the years, and ideally this barrier should be replaced every 8 years to maintain satisfactory air circulation. However, this is expensive and tedious, since the housing section and possibly the entire housing must be taken out of service for a long time.

The use of diffuse ventilation in a pig barn also means that there is often a lot of dust and many ammonia vapors in the barn air, and therefore have a limited effective ventilation capacity.

20

Examples of other existing ventilation types are described in GB 1 470 793 and DE 27 09 510. In these systems, traditional straight air ducts located below or near the floor of the stable building are used.

25

Therefore, there is a great and unprecedented need for new housing facilities, with which an optimal animal production, increased animal welfare and an improved working environment for the farmer can best be achieved. In addition, there is a need for housing facilities that can easily be expanded without problems with logistics, animal welfare and the working environment.

4 DK 177106 B1

Inflexible ventilation systems that impose unnecessary, impractical and costly restrictions on the buildings and any subsequent extensions of housing units in particular hinder the development of new housing structures, which requires new thinking within 5 choices and use of ventilation systems.

Therefore, there is a need for a new type of ventilation system that can ventilate very large rooms, especially stables, without any problems with, among other things. bumpy 10 air replacement, clogging, and deterioration of venting installations for longer periods of use will benefit both animals and humans.

According to a first aspect of the present invention, there is provided a method and ventilation system of the kind mentioned above to exchange the air in very large buildings such as large housing sections and housing arrangements consisting of several small or large housing sections.

20

According to another aspect of the present invention, there is provided a method and ventilation system of the kind mentioned above with which the air quality can be increased and which reduces the concentration of airborne dust and ammonia in the air in the building. In a third aspect of the present invention there is provided a method and ventilation system of the kind mentioned above, which permits constant and uniform exchange of air in a building.

In a fourth aspect of the present invention there is provided a method and ventilation system of the kind mentioned above, with which the air which is conducted to one or more buildings can be cooled in summer and heated in winter.

In a fifth aspect of the present invention.

For example, there is provided a method and ventilation system of the kind mentioned above with which 10 alternative and logistically advantageous housing structures and housing structures can be erected.

In a sixth aspect of the present invention, there is provided a method and ventilation system of the kind initially mentioned which reduces odor nuisance to the environment.

In a seventh aspect of the present invention there is provided a method and ventilation system of the kind mentioned above with which a housing construction can be altered and expanded.

In one aspect of the present invention, there is provided a method and ventilation system of the species mentioned above in a barn or a housing arrangement of the species mentioned above, which supplies and maintains a level of fresh air to the animals. In a ninth aspect of the present invention, there is provided a method and ventilation system of the kind mentioned above which minimizes problems with the humidity of the building.

In a tenth aspect of the present invention there is provided a method and ventilation system of the kind mentioned above which minimizes problems with mold.

In an eleventh aspect of the present invention there is provided a method and ventilation system of the kind mentioned above which are easy to clean and maintain.

In a twelfth aspect of the present invention there is provided a method and ventilation system of the kind mentioned above with which can be constructed stables with lower roof height than previously known and with lower requirements for the roof structure statics.

The new and distinctive effect of this is that the method of exchanging air in at least part of a building is carried out by the first conduit · and the second conduit having a common wall arranged between the first conduit and the second conduit so that the cross-section of the first conduit is reduced in the direction from the first end of the first conduit towards the second end of the first conduit, the cross-section of the second conduit is reduced in the direction from the first end of the second conduit to the second end of the second conduit, and 30 - the first end of the first conduit faces the other end of the second conduit and / or vice versa.

7 DK 177106 B1

A converging / diverging arrangement of the common wall between the first conduit and the second conduit ensures that the desired air velocity and air pressure are maintained throughout the length of both the first conduit 5 and the second conduit.

This in combination with overhead ducts located under the floor of the building, in which the wall is formed with holes or openings for air passage along the longitudinal direction of the 10 overhead ducts, makes it particularly easy to make smooth replacement of air throughout the building, including its possible space or other division. . The first and second conduits can, within the scope of the present invention, be positioned almost anywhere below the floor, allowing for unprecedented great freedom when planning the layout and construction of the building. The location of the overhead ducts is thus hidden and not conditioned by e.g. the dimensions and strength of the roof structure.

When the supply of fresh air and the extraction of contaminated air 20 occur through each duct with a series of first holes and a series of second holes respectively, the venting, i.e. the replacement of air is done evenly or concentrated in the zones where it is most advantageous. The replacement can also be done with combinations of these ways.

When the method comprises the step of directing the second amount of air from the interior space of the building to the second station outside the building via one or more intermediate stations, it will be possible in an example central room or duct to purify the contaminated air to an extent so that the purified air can be brought into compliance with applicable national and regional environmental requirements.

From here, the purified air can then be directed to another station, which may, for example, be one or more exits on the roof of the building, whereby the final discharge of air to the environment from the building can be done wherever desired. The other stations located on the outside of the building can be easily hidden or designed so as not to be detrimental to the overall building. An intermediate station can e.g. be another room where the requirements for air purity are lower and where the exchange of air can be done according to a different regime than in the first room.

The above-described method can advantageously be used when the building is adapted for animal breeding, preferably a pig production barn. In this case, an indoor climate for animals and humans is achieved that is far better than previously known. When air extraction occurs at floor level, as much dust as possible and, for example, ammonia-contaminated air, can easily be sucked out rather than dispersed around the room. When the supply of clean air is also carried out at floor level, the entrained air is maximally utilized since it is here on the floor the animals move. Thus, fresh air is directed directly to the animals as well as contaminated air is immediately removed from the animals direct environment. Thus, the quality of the air around the animals can be significantly improved over that of known stables.

The exchange of air can be done continuously, at fixed intervals or for a fixed period of time, optionally for a custom time interval. This means that you can vent when needed. For example, the vent can be turned off during periods when an area is emptied of animals, as well as the vent can be intensified during periods of greater need, e.g. if it is very hot or contaminated in the building or when increased ventilation for any other reason is deemed necessary. When the ventilation can be adapted to the need, 9 DK 177106 B1 can save resources which otherwise entails an economic as well as an environmental impact.

The air to be replaced may have a content of at least one gaseous or particulate contaminant, which means that the vent system must be capable of treating many different air compositions. For example, it is important that the conduits do not stop due to dust, and it is also important that the conduits are sized and positioned properly relative to being able to remove gaseous contaminants from the building before mixing too much into the existing ones. air in the building. The method presented here meets both of these requirements better than known techniques for e.g. venting of pig stables.

15

The air, which is passed through the first conduit to the interior space, may contain an additive so that it is possible to further regulate the indoor climate of the building. Such additives may be selected from the group comprising means for bonding dust to the air in the interior space, ozone, airborne or air-soluble drugs, air cleaners and fragrances.

That is, for example, the additives may be agents which e.g. can help improve the air quality of the building, or e.g. may help reduce the risk of infection among animals.

The first and / or second amount of air can be directed to and from the interior of the building, respectively, by means of pumping means, suction means or blowing means. When both pump and suction means 30 can be used, it is possible to design the arrangement of the system so that it works optimally in many different configurations.

Several pumps or fans can be inserted into different locations in the system to optimize operation, as the suction and / or pumping effect can be amplified in specially selected locations if considered necessary. Switching on and off of pumps or fans can be centrally controlled if the building's internal space 5 and the air therein are monitored, and representative data is collected and processed on computers with software designed for this purpose. The exchange of air can advantageously be regulated by opening and closing motor controlled dampers.

10 The first and / or second amount of air may constitute a subset of the total airspace of the interior space, which allows one to choose to allow a portion of the air to be discharged or introduced elsewhere into the interior space of the building. It can be, for example, under the roof or in areas with particularly heavy pollution of the air.

Advantageously, the air which is conducted to the interior room can be temperature controlled. This allows the air to be cooled on hot summer days and warmed up if needed during 20 cold periods. For example, heating and cooling can be done by means of an earth heating system that can provide the necessary heating and cooling with minimal use of resources. Such temperature control provides an improved working environment as well as increases animal welfare.

25

For new Danish pig stables that have been used after 1 July 2000, there must be installed in pigs for pigs over 20 kg, a shower system or similar, so that the pigs can regulate their body temperature. The requirement applies to all Danish 30 pig stables established after July 1, 2015. In Danish pig stables for detached pregnant sows and gilts established after January 1, 1999, there is a requirement for a sprinkler system or an equivalent 11 DK 177106 B1 temperature control solution with which the pigs body temperature can be regulated. This requirement applies to all Danish pig stables from January 1, 2014. Since January 1, 2005, there has also been a requirement that in all Danish pig stables there must be a sufficient number of 5 nursing homes, so there is always at least one nursing home ready. There are special requirements for interior design and area.

Controlling body temperature by air is an attractive alternative to sprinkler systems using 10 water. The sprinkling water moistens the litter and thus promotes the occurrence and possibility of occurrence of mildew, as well as the diversion capacity for the sprinkling water.

A housing section in the form of a building defining an interior space with at least one circumferential wall, roof and floor comprises a first station arranged outside the housing section to direct a first amount of air into the housing space's interior space via at least one below the housing section of the housing section. floor extending 20 first conduit formed with a longitudinally spaced apart number of first holes, and - at least one second duct extending second conduit formed with a longitudinally spaced apart number of second holes. conducting a second amount of air from the interior space of the housing section to a second station arranged outside the housing section and - in that a first conduit and a second conduit have a common wall arranged between the first conduit and the second conduit thus 12 - 177106 B1 - that the cross-section of the first conduit is reduced in the direction from the first end of the first conduit e towards the other end of the first conduit, - the cross-section of the second conduit is reduced in the direction 5 from the first end of the second conduit to the second end of the second conduit, and the first end of the first conduit faces the other end and / or vice versa.

As previously mentioned, such a converging / diverging arrangement of the common wall between the first conduit and the second conduit ensures that the desired air velocity and air pressure are maintained throughout the length of both the first conduit and the second conduit.

Thus, a housing section thus designed provides a very wide framework and great freedom to design the housing section, since the ventilation system described can ventilate very large spaces. The area under the roof is kept free when both the first and second conduit ducts are located under the floor of the stables section, as it includes. it is not necessary to install ceilings in the stables section as required when using traditional diffuse venting.

25

Danish pigs must, for example. not constantly kept in the dark. There must be natural or artificial lighting corresponding to a light intensity of 40 lux for a period of at least 8 hours. Normally, pig stables are furnished with both artificial lighting and 30 windows. In the housing section of the present invention, windows can be designed in the ceiling of the housing section, and therefore the need for artificial lighting is substantially reduced, and thus the operating costs for electricity.

In addition, the ceiling height can be significantly increased compared to 5 conventional housing construction. A housing section with increased ceiling height can accommodate more air than housing sections with a ceiling and porous barrier, with consequently markedly improved indoor climate, working environment and animal welfare. Likewise, it means that the supply of fresh air and the extraction of polluted air can be carried out where it is needed, namely in the area near animals and humans.

The second amount of air can be discharged from the interior of the housing section to the second station outside the housing section via one or more intermediate stations. When the second amount of air is discharged through an intermediate station, it allows the polluted air to be purified in a central location before being discharged to the environment outside the building. This can simplify the maintenance of any air purification systems, as well as facilitate the conversion between several types of air purification, or the conversion to, for example, increased cleaning capacity. In addition, the discharge via one or more intermediate stations to another station, which may be, for example, one or more exits on the roof of the building, as described for the method according to the present invention, may mean that the discharge of air from the building can take place where desires, as well as the other stations located on the exterior of the building can be concealed or designed so as not to be detrimental to the overall building 30 while maintaining maximum suction and cleaning capacity.

14 DK 177106 B1

Advantageously, one embodiment of the housing section comprises a plurality of deflection ducts extending beneath the floor of the housing section substantially parallel to at least one of the first and / or second conduit channels, and the other 5 holes of the second conduit channels being arranged in fluid communication with the housing section through the floor. above the deflection channel, and the first holes are in fluid communication with the housing section via the floor, e.g. near a wall or partition. In particular, this allows the extraction or discharge of polluted air to occur very close to the largest source of air pollution, ie. eg. near the animal producing ammonia and swirling dust, or near other forms of dust sources. It is shown by the inventor of the present invention that if only 25% of the exhaust air 15 occurs through many holes near the floor, and in particular near the exhaust ducts, 60% of the ammonia pollution in the air in the housing section is removed. In addition, this means that the first and second holes are kept clean and free of deposits each time the floor of the housing section and the housing section is generally cleaned, which typically happens every time the livestock animals are moved to a new area of the housing section or to a new housing section.

In a preferred embodiment of the invention, the deflection channels and the first and / or second conduit channels may have a common wall so that fluid communication with the deflection channels can be achieved and secured in a simple manner. In an alternative embodiment, the deflection channels and the first and / or second conduit channels may be spaced apart and brought into fluid communication with each other via tubes extending between the first and / or second holes and the deflection channels. so that the fluid communication between the deflection channels and the conduit channels does not depend on the distance between them.

This alternative embodiment involves a great deal of variability for designing ductwork ducts, conduit ducts, first and / or second holes and thus a flexibility to create the ideal housing section for a given need and task.

A deflection duct and an associated first or second conduit can be sized and arranged relative to each other to prevent solid waste from the housing section from entering the first and / or second conduit respectively. This prevents clogging of first and / or 15 second holes and thus unnecessary cleaning. Generally, this should not be a problem, but in special circumstances it may be necessary.

The housing section may be designed for pig breeding and have an interior space in which the air to be replaced has a content of at least one gaseous contaminant such as ammonia and / or at least one particulate contaminant such as dust. Both the housing section and also the method described above for replacing at least a portion of the air in at least a part of a building which, with at least one circumferential wall, roof and floor, delimits an interior space suitable for use in pig breeding and the consequent inevitable production of contaminants and dust.

The air which is conducted through the first conduit to the interior space of the housing section may contain an additive optionally selected from the group comprising means for bonding dust in the air in the interior space, ozone, airborne or air-soluble. medicines, air purifiers and fragrances. The advantages of this are described above, and a housing section thus using the method described above can thus be ensured a particularly ideal indoor climate and good air quality.

If the first and / or second amount of air can be directed into and from the housing section's interior, respectively, by means of pumping means or suction means, there is a wide possibility to design and design the housing section and ventilation system in the housing section for use with the method described above according to the present invention. . The preferred pump or suction means is capable of creating such a large vacuum that the air in a number of housing sections is replaced by vacuum.

In one embodiment, the first and / or second amount of air constitutes a subset of the total air volume of the interior space. If a subset of the air in a housing section is replaced as described above in connection with the description of the method of the present invention, fresh air may be allowed elsewhere in the housing section as needed, and air containing undesirable substances may be drawn out wherever it is. appropriate.

25 Even only partial suction of polluted air via holes near the floor can ensure a relatively high removal of, for example, ammonia.

Advantageously, the air supplied to the interior space may be 30 temperature controlled so that the temperature in the housing section can be adjusted as required. This has obvious advantages as also described above in connection with the description of the method of the present invention which can advantageously be practiced in the housing section. Since several first stations with air intakes outside the building are possible, it is also possible to temperature control 5 different parts of the housing section differently as needed, and it is possible to switch off the temperature control if it is not needed. The suction air that is blown or sucked into the housing section can e.g. is conducted over or through an air conditioner, or just 10 over or through a cooling or heating station.

Those of skill in the art will appreciate that room temperature, air circulation and dust content are essential factors for the well-being of pigs and other animals. Therefore, the air exchange and ventilation system 15 in a stable or housing section must be adapted so that the ventilation air can remove contaminants, excess heat and dust particles as best as possible.

In a suitable embodiment, the housing section may be arranged to be expandable at least in the longitudinal direction of the first and second conduit channels. This means that the farmer, when constructing the housing section, can take into account a later expansion of the production capacity, arrangement of the housing section and / or changes in logistics in connection with the movement of animals between areas in the housing section. In practice, this can be done by the end wall of the building being non-load bearing and the roof height and slope being chosen so that the depth of the housing section can be increased to the desired target. Likewise, at least the first conduit and second conduit are dimensioned to provide ventilation capacity to vent and ensure air quality in the later expanded housing section.

18 DK 177106 B1 When at least one of the holes in the first and / or the second conduit extends obliquely through the wall of the respective conduit in the flow direction of the flowing air 5 and / or obliquely towards the floor, the air can be controlled to and from the housing section by at least possible air resistance. Furthermore, the risk of clogging the holes through the floor or the ducting duct is significantly reduced.

Conveniently, a housing arrangement comprising at least two spaced apart housing sections can be established such that at least two other housing sections of stations are arranged in or terminate in the same discharge building, preferably a discharge tower having an upwardly extending discharge end. Thus, even large productions can be accommodated in a total housing arrangement according to the invention. In addition, this means that a farmer, who has started a livestock herd that can be housed in a single housing section, but who wants to increase his production capacity, has the opportunity to build a new and 20 similar housing section in connection with the existing housing section without disproportionate costs of diversion systems. This also means that it is possible to maintain optimum logistics in the total housing facility and thus ensure a very high flexibility in the 25 animal husbandry. In addition, the discharged air can be purified in a central location and no separate cleaning measures are needed in each housing section.

Although this is rarely the case in current agriculture 30, the housing arrangement of the present invention provides a whole new opportunity to keep different animal species or the same animal species at different stages of development in the individual housing sections of the housing arrangement, a significant portion of the ventilation system being common to all housing sections. In addition, assembling the housing sections for a housing arrangement with a common discharge building also allows 5 to retain the other advantages which, as mentioned earlier, are by using intermediate stations for the purification of polluted air before it is completely discharged into nature, and by maintaining air purification installations etc. One possible form of the total housing arrangement is a 10 square structure, or an approximate square structure, in which the various subsections in the form of functional areas such as danger boxes, pregnancy paths etc. are distributed such that an animal's total migration paths in a production cycle is reduced, thereby optimizing the logistics in 15 housing arrangements compared to conventional housing arrangements with parallel connected housing sections with a large distance between them. Thus, if the housing arrangement of the present invention comprises at least four housing sections arranged substantially symmetrically about the discharge building, it is possible to achieve a very large production capacity with the least possible cost, or a very large increase in an existing capacity.

A housing arrangement with four housing sections may also consist of two approximately square housing arrangements as described above, which may be used. can be built together via a central unit that contains loading / unloading facilities, feed handling and storage, crew areas such as kitchens, toilets etc. Such a central unit can of course also exist in connection with all previously described housing arrangements and housing sections.

20 DK 177106 B1

The housing arrangement according to the invention may advantageously comprise a number of housing sections adapted to various stages of animal breeding, including one or more housing sections adapted to pregnant animals, a housing section for small animals, a danger section, a housing section for growing up, and a housing section for random isolation of animals. . This provides an opportunity to ensure the optimum interior design for both animals and humans.

In addition, each housing section may be subdivided into sub-sections, such as areas with different functions and separate devices. Thus, preferably, each housing section may contain a single function, but alternatively, a housing section may also be subdivided into several subsections with different functions, such as danger boxes, gestational areas, areas for piglets, etc., where each of these subsections 15 is best positioned relative to each other. in the individual housing section. That is, housing sections and / or sub-sections are positioned relative to each other in such a way that the migration paths are optimized, so that all movements are in total aimed at following the shortest possible total migration path in an animal's production cycle, e.g. . a pig's production cycle. In addition, the transport of piglets may be completely avoided before the piglets have reached a certain size, which may have taken into account that animals in certain sub-sections or housing section areas require more rest than 25 others and may have taken into account: that some animals may benefit from periods of warmer housing conditions than others. Within the scope of the present invention, this list of logistical benefits is not exhaustive, and many others will be apparent to those skilled in the art upon reading the present disclosure.

21 DK 177106 B1

The invention also relates to a ventilation duct system of the kind mentioned above.

The ventilation duct system of the invention comprises a first conduit formed with a longitudinally spaced apart number of first holes, a second conduit formed with a longitudinally spaced apart number of second holes, means for via a first end. sucking, pumping or blowing a first amount of air into the interior space of the building through the first holes, and - means for sucking, pumping or blowing a second amount of air out of the building through a first end of the second conduit. inner space through the other holes.

15 The first conduit and the second conduit in the ventilation duct system have a common wall.

The ventilation duct system will then be particularly easy to install, as only a single unit must be transported and laid down below floor level. The common wall can also serve as the heat exchange surface between fresh air entrained and polluted air. In the ventilation duct system of the present invention 25, the common wall is arranged between the first conduit and the second conduit in the ventilation duct system so that the cross-section of the first conduit is reduced in the direction from the first end of the first conduit to the second end of the first conduit 30, that the second conduit cross section is reduced in the direction from the first end of the second conduit towards the second end of the second conduit, and the first end of the first conduit faces toward the second end and / or vice versa of the second conduit.

Such a converging / diverging arrangement of the common wall between the first conduit and the second conduit in the ventilation duct system ensures that the desired air velocity and air pressure are maintained throughout the length of both the first conduit and the second conduit. The air in, for example, housing long 10 conduits according to the invention, where conduits e.g. transverse to the housing sections, can be replaced and supplied homogeneously, as the reduced cross section maintains the same pressure difference over the entire longitudinal extent of the conduit and thus permits substantially the same amount of fresh air through all the holes in the first conduit and pretty much the same amount of polluted air is extracted from the barn through all the holes in the second conduit.

Such a ventilation duct system is particularly suitable for ensuring an air exchange that is optimal in all areas of a large room or of a building with a large interior space with subdivision. The first conduit duct and the second conduit duct with several holes ensure that fresh air can be supplied where necessary and that contaminated air can be removed in several places along each of said duct duct. This new ventilation system also means that a very high roof ridge on the building is no longer needed, as it is for example. is known from traditional housing construction with traditional 30 venting.

23 DK 177106 B1

This is particularly advantageous as obtaining a building permit can be difficult in view of various local plans for the area in which the housing construction is desired to be established, since buildings designed in accordance with the principles of the present invention do not damage the surroundings in the same way as traditional stables. In addition, the new housing structure, with housing sections and housing arrangements, in which the new ventilation structure is implemented, means that it is possible to design windows in the roof, which provides a comfortable natural 10 daylight in the housing. This results in a markedly improved working environment for the farmer and a markedly improved animal welfare, as well as great savings in electric lighting.

Means for sucking, pumping or blowing air from the first and second stations may be the same or different.

The ventilation duct system may be arranged such that the first holes or the second holes are formed in the side or area of the first conduit duct or the second duct facing the inner space, respectively. This means that there is no need for additional equipment to conduct air to and from said conduit ducts. If the ducts are under the floor of a building, the replacement of air can easily and advantageously take place through the floor or through holes near the floor level. In the case of animal husbandry and housing sections, this has special advantages, as described above.

If the angle between the common wall and a longitudinal flow axis of a conduit is constant throughout the length of the conduit, a uniform air flow in the conduit is ensured.

Thus, when there are no cracks and / or incremental changes in the inner cross-section of the conduit, a significant advantage is obtained in maintaining a continuous, quietly unobstructed, appropriate flow through the conduit.

Thus, an appropriate common wall has a substantially smooth surface with no major notches, ledges or the like on which impurities can be deposited.

The cross-section of the first and / or second conduit duct of the ventilation duct system may have a circumferential outline which may be at least partially circular, oval, elliptical, square, rectangular, or polygonal. The choice depends on the ventilation requirements of the individual building, and provides additional flexibility in installing the ventilation duct system and its possibility for installation in different building structures. In a particularly flexible embodiment of the ventilation duct system of the present invention 20, at least one of the first conduit duct and the second duct duct may be constructed of a plurality of serially connected duct duct sections, and preferably both duct ducts may be constructed of serially duct duct sections, e.g. 25 conduit sections provided in sufficient numbers to ensure economically viable construction of the ventilation duct system, as well as facilitating the actual installation of said ventilation duct system, each conduit not being molded as a separate unit, but 30 being assembled by prefabricated elements.

The duct section sections can advantageously be made of concrete, as concrete is easy to work with, is strong and durable and can withstand the aggressive environment that exists when fertilizers, and especially slurry, are present. A conduit can, within the scope of the present invention, be formed of materials other than concrete, such as a plastic material which, in the same way as concrete, is resistant to influences, both chemical and physical, from the environment.

A ventilation duct system with conduit ducts of reduced cross section is described here in the context of a stable, but may also be used in other contexts where the challenges for ventilation are the same. Therefore, within the scope of the present invention, use may be made in, e.g. rooms, areas and buildings of different types where air replacement is needed in several sub-areas.

15

A logistics for planning and furnishing a housing section may be used, where housing section and or housing arrangement is divided into sub-sections separated by corridors and / or walls, and said subsections are positioned relative to each other in a manner which ensures that a breeding animal total transport distance measured over a cycle from insemination to insemination is the shortest possible.

The ventilation system is thus very flexible since it can be dimensioned to ensure that even very large areas in e.g. very deep buildings have an optimal air exchange without having areas of unnecessary drag, as is known from traditional systems where inputs and outlets are carried out through few and much larger inputs and outputs towards areas, 30 including sub-areas, which usually means, that there are features and that in parts of the area and / or sub-areas it is too hot or too cold. Such problems are particularly well known from 26 DK 177106 B1. a. large space offices, and thus can be remedied with the ventilation duct system of the present invention.

In floor construction, the ventilation duct system can be located in the floor separations, which allows for 5 air exchange from both ceiling and floor. Under such other conditions in other types of buildings, the method of air exchange initially described may also be used to the extent appropriate. For example, another amount of air discharged via the other duct (s) may go to a central air treatment station before being discharged from the building or recirculated as clean air.

The above-described inventions will be described in more detail with reference to the drawings.

FIG. 1 shows a diagram of a first embodiment of a housing arrangement according to the invention, 20 fig. 2 shows, in perspective, a fragment of an example of an embodiment of a sub-section in a housing section designed according to the invention for use with the method according to the invention, FIG. 3 is a perspective view of one embodiment of a conduit duct section according to the invention; FIG. 4 is a perspective view of another embodiment of a conduit duct section according to the invention, FIG. 5 shows a section along the line V-V in FIG. 3 with two conduit duct systems arranged on opposite sides of once and two duct ducts; Fig. 6 shows an overview view of a housing section arranged logistically according to the invention; 7 shows an alternative logistically arranged housing section; FIG. 8 shows another alternative logistically arranged housing section; FIG. 9 schematically shows two housing sections connected to the same common exhaust duct, and FIG. 10 is a schematic perspective perspective view of a housing arrangement with two housing sections discharging polluted air into a common intermediate station building.

FIG. 1 shows an example of a housing arrangement 1 according to the invention, consisting of a first housing section 2 and a second housing section 3 connected via an intermediate station 4, in the form of a building 4. The first housing section 2 is divided into three subsections, respectively, two climate stables. 5.6 for piglets, 25 and one in between the climate stables 5.6 inserted stables 7. The second stables section 3 is divided into four subsections, respectively a stables 8, two gestation stables 9,10, and a running stables 11 inserted between the two gestation stables 9, 10th In addition, the housing arrangement 1 contains a staff section 12, a feed section 13, a pharmacy / veterinary room 14 and a technical room 15.

The housing sections 2,3, are separated by several times 16, including once in the intermediate station. The housing arrangement 1 has a total depth D, which in the example shown is approx. 77.5 meters, and a total width C, which in the example shown in FIG. 1 is approx. 93 meters and extends over the first housing section 2 and the second housing section 3.

5

FIG. 2 is a perspective view of a fragment of the embodiment shown in FIG. 1 indicated two climate stables 5, 6 arranged for piglets G with a total of nine booths 17, five booths 17 and four booths 17 on each side of a hall 16. The number of booths is given by way of example only and should not be construed as limiting the invention. The stalls 17 in the climate stables 5,6 have a floor 18, which consists partly of bed sheets 19 and slurry 20 for the piglets G. The bed sheets 19 cover about half of a stall 17, and the slats 20 cover the remaining part of each stall. The floor 15 18 additionally comprises a corridor area 21. Under the slats 20 is an exhaust duct 22, and beneath the lying plates 19 is arranged a ventilation duct system 23 for e.g. by means of underpressure provided by means outside the boundary of the housing section, by passage under the floor 18 to replace the air in the housing section. The ventilation duct system 23 has a first conduit 23a and a second conduit 23b.

One end of the second conduit 23b opens into a vent channel 24, which in turn opens into a common vent duct 26 in an intermediate station 25 common to both the 25 housing sections shown and all other housing sections, as shown in FIG. 1. The common exhaust duct 26 has a ventilation outlet 27 to create a vacuum with a blower 28 therein, with which it is possible to discharge the exhaust air, ie. the contaminated air, from the housing section 30, 5.6 and optionally purifying the polluted exhaust air by means not shown in e.g. extraction ducts, means located elsewhere in the intermediate station 25 or outside the intermediate station 29 DK 177106 B1 25. The intermediate station 25 extends longitudinally perpendicular to the latitudinal direction of the housing sections 5,6. Under the common exhaust duct 26 is arranged a through-going area 29 / which contributes to the housing arrangement being such logistics 5 that a pig during a production cycle is moved as short as possible, as well as the pig farmer and his staff must also move less than previously known, and thus Save time. The intermediate station 25 and the walking area 29 can advantageously be at least part of the central central building 4 shown in FIG. First

10

The first conduit 23a of the ventilation duct system 23a has along its length a series of first through holes 30 formed in its wall, and the second conduit 23b has along its length a series of second through holes 31 formed in its wall. The holes 30, 31 are shown in FIG. 2 is shown schematically and will be described in more detail with reference to the following figures. The holes are also indicated with different cross sections, but can have all kinds of cross sections imaginable within the scope of the invention. The holes 31 in the second 20 conduit 23b are arranged facing the deflection conduit 22 and extend toward this deflection conduit at an angle of typically approx. 45 °, i.e. the holes point in the direction from the outlet duct and down, as well as in the flow direction. The first conduit 23a series of first holes 30 distributes, 25 as shown by arrows A, a first air flow, e.g. fresh air, to the climate barn 5.6 directly under the piglets G, and through the second line 31 of the second conduit 23b, another air stream, as shown by arrow B, is drawn from the climate barn 5.6 through the slurry 22 where the pollution from the piglets G is 30 largest, and into the second conduit 23b. The polluted air B is sucked up through the exhaust duct 24 and further up into the common exhaust duct 26 in the intermediate station 25, after which it is discharged from the housing arrangement 1 via the ventilation outlet 27.

Particular embodiments of the first and second conduit 5 will be described below and all of the conduit channels and conduit arrangements shown can be used in the ones shown in FIG. 1 and 2, housing sections and housing arrangement, as well as in any building where air is to be replaced. The choice depends on the 10 air replacement needs and the spatial restrictions required by the building's other interior design, as well as the building regulations.

FIG. 3 shows a preferred embodiment of a conduit section 23 'to a ventilation duct system 23, e.g. may be that in the housing sections 5,6 of FIG. 2 used. Conduit section 23 'has a substantially rectangular cross section, a first end 32 and an opposite second end 33, and a longitudinally extending partition 20 34 dividing longitudinally and diagonally the ventilation duct system 23 into a first conduit 23a having a cross section. which is reduced toward the second end 33 of the conduit section 23 ', and a second conduit 23b having a cross-section reduced to the first end 32.

25

A ventilation duct system 23, which may consist of a single continuous conduit section 23 'or more adjacent conduit sections 23', is installed under the floor of a housing section such that the first end 32 of the first conduit 23 is in communication with a first station (not shown), e.g. outside of the one shown in FIG. 1, so that fresh air or air 31 with a desired additive can be delivered inside the housing section room from the first station outside and up through the floor. The wall of the first conduit 23a has a series of first holes 30 shown here which extend obliquely through the wall, e.g. in an angle of approx. 45 ° towards the floor and at an angle of 45 ° longitudinally through the wall parallel to the flow direction of the air. If the ventilation duct system 23 is composed of multiple conduit sections 23 ', the conduit sections 23' are mutually shaped such that the transition between two conduit sections 23 'is continuous and stepless.

The ventilation duct system is installed with the first holes 30 of the first conduit 30 located all the way below a floor in a housing section, e.g. near the wall at the piglets' berths. The inner conduit or duct of the first conduit 23a incrementally tapers against the opposite second end 32 and the air, as shown by arrow A, is fed through the first holes 30, is sucked up through the floor and distributed as a result of the applied underpressure in the housing section. room. In the embodiment shown in FIG. 3 of a ventilation duct system 23 'according to the invention, the first holes 30 are provided with different types of distribution pipes 30a, 30b for directing the supply air in the desired direction towards the floor of the housing section, e.g. in the stalls so that the air can be supplied locally and close to the animals. The type of manifold can be the same or different, as well as manifold can be completely avoided. Since the cross-section of the first conduit 23a is reduced towards the other end 33 of the ventilation duct system 30 23 ', an approximately constant differential pressure (i.e.

the pressure difference between the pressure on the inside of a 32 duct duct and the pressure in the stable) over the entire length of the first duct.

The design of the second conduit 23b is based on the same principle as the design of the first conduit 23a. A series of second holes 31 extend obliquely through the wall of the second conduit 23b, e.g. at an angle of approx. 45 ° with respect to the overlying floor and at an angle of 45 ° longitudinally through the wall in the flow direction B of the air 10, so that polluted air is drawn from the housing section room, via the slats 20 through the second holes 31, as shown by arrow B, and into the second conduit 23b, whereupon this contaminated air is directed away from the housing section, e.g. as described in FIG. 2. As the cross-section of the second conduit 23b 15 increases toward the other end 33 of the ventilation duct system 23, a substantially constant differential pressure is maintained over the entire length of the second conduit 23b.

The wide end of the first conduit 23a is called the first end of the first conduit 20 and the pointed end of the first conduit is called the second end of the first conduit. The wide end of the second conduit 23b calls the first end of the second conduit and the pointed end of the second conduit is called the second end of the second conduit.

25

As it is possible to maintain a constant differential pressure over the length of both conduit channels, all animals will be subjected to the same gentle and efficient air exchange, and therefore will not be subject to unnecessary drag or stay in heavily polluted air for longer than is necessary. By removing the polluted air, e.g. air with a high content of dust and ammonia from the animal's immediate surroundings, the air extraction path is made shorter than in many known housing structures. Supply air can be easily cooled or heated before passing through a ventilation duct system of the present invention through the floor and into the barn.

5 Tempered air can replace water as a means of adjusting the animals' body temperature, so that expensive water irrigation systems can at least partially be avoided.

This further helps to reduce the odor nuisance from a barn.

10

FIG. 4 shows an alternative embodiment of a conduit section 35 for a ventilation duct system according to the present invention, in which the wall of the conduit section for reasons of clarity is shown to be transparent.

The conduit section 35 has a circular cross section and is divided by a partition 36 into a first conduit 35a and a second conduit 35b. Conduit section 35 has a first end 37 and a second end 38, and the cross-section of the first conduit 35a is reduced towards the second end and the cross-section of the second conduit 35b is reduced in the direction toward the first end in a similar manner as described. for the one shown in FIG. 3. The first conduit has a number of evenly distributed along that length a series of first holes 39a, and the second conduit 35b similarly has a number of second holes 39b. Both the first and second holes are provided with pipe extensions 40 which are not always necessary, however.

As will be understood by the embodiment of FIG. 5 is a schematic diagram of a housing section where the section through the conduit system is laid along line V-V in FIG. 3, a second hole 31 in a particularly convenient embodiment may extend at an angle 34 through the wall of the conduit section 23 in such a way that the opening facing the inner passage through the duct is located closest to the air. current longitudinal flow direction through the respective conduit. That is, the inlet and outlet apertures in the hole are longitudinal offset relative to each other, allowing the air to pass with the least possible friction out of the conduit. Since the section V-V is placed under the upper wall of the conduit from which the holes extend offset into the first conduit, these cannot be seen in FIG. 5, but is shown in the transverse section of the conduits, as shown in FIG. 2nd

Within the scope of the present invention, this offset provides an arbitrary hole through the wall of the conduit channels where the hole may extend longitudinally at an angle from within and out of the conduit but also take an angle with respect to the overlying floor. Both of these angles can be freely chosen between e.g. 0-90 °, more preferably between 20-89 °.

20

FIG. 6 shows a section of a housing section 5, in the form of a climate stable, where the piglets G can go. The section of the climate shed shows four sub-sections, each having an aisle 16 positioned between two rows with each twenty-two cubicles 25 17. In the area of each cubicle closest to the corridor 16, the floor consists of a slab 20 and in an area furthest away from The passage 16 and adjacent to a path in the next section consists of a fixed bed plate 19. At each end of the passage 16 there is an exit towards the passage 16 and out respectively. Below the lying plates 19 30 in a direction parallel to the aisle 16, they are shown in FIG. 3 ventilation duct system 23 installed. The first conduit 23a has its width end extending towards the outer wall of the housing arrangement, and through this width end fresh air is drawn in. A portion of this fresh air passes through the full length of the first conduit 23a and out through a series of first holes 30 and beyond into the housing section. The air coming in from the first station is shown by arrows I. The second conduit 23b has its narrow end extending towards the outer wall of the housing arrangement and its width end opposite, ie. towards the central central building 4, where its width end communicates with a vent channel 24, 10 which in turn communicates with a common vent channel 26, as shown in FIG. 2. In the climate shed 5, the piglets G roam freely in the paths, but in the gestation shed where the sows are stuck, it is a clear advantage if you let the fresh air out of the first duct immediately outside the sow's head.

15

FIG. 7 shows a section 9 'of a pregnancy barn 9. The basic principles of the pregnancy barn are known from the one in FIG.

6, and the same reference numerals are used for the same parts. In the example shown, each booth 17 is elongated and narrow 20 such that it only accommodates a single animal (not shown). The animal stands with its nose against the rear wall 17 'of the stall 17 and directly next to its head there is a supply of fresh air 30.

The rear of the sow faces the corridor 16, which consists here of slate 20 as well as the half of the floor of the stall 17 which 25 faces the corridor 16 consists of a slate 20. For the sake of overview, said slate 20 is only shown in three areas but extends to be real throughout the length of the walk, ie. that the slats 20 form part of the floor of all the stalls shown, although not seen here. As in FIG. 6 shows the air coming from the first 30 station with arrows I.

36 DK 177106 B1

FIG. 8 shows another embodiment of a housing arrangement 1 according to the invention, wherein the first 42 and second conduit 43 lie below the floor at a distance from one another without a common inclined partition. The housing section itself is the one shown in FIG. 6 described 5 climate sheds for piglets. The ventilation duct system differs from the previously described in that three duct ducts are provided, respectively, two first duct ducts 42 which direct fresh air into the housing section and a second duct duct 43 which conducts contaminated air out of the stables. The first two ducting ducts 42 lie below each of a series of reclining plates 19 and the second ducting duct 43 lies beneath the floor in the intermediate 16. Neither the first two ducting ducts 42 nor the second ducting duct 43 are tapered but have the same cross-section of the duct duct 42,43. length. Due to the lack of taper, it is not possible to suck out as large quantities of polluted air from the housing section as described when ventilation duct systems with tapered internal passage are used, as there is an air loss and pressure loss during passage out through the first and 20 second holes 30.31. This means that only approx. 25% of the air in a housing arrangement can be replaced through the floor if this ventilation constellation is selected. However, measurements have shown that due to the appropriate placement of the holes 31 which suck out contaminated air, ie. the location directly out to the deflection duct 22 through holes extending through the second conduit at an angle in the longitudinal direction, so that the loss of pressure is as small as possible, a full 65% of the ammonia in the housing arrangement is nevertheless removed, which gives a significantly improved indoor climate in the housing using 30 traditional diffusion ventilation. As in FIG. 6 shows the air coming in from the first station with arrows I.

37 DK 177106 B1

FIG. 9 schematically shows a section through two housing sections connected to the same common exhaust duct 26. The embodiment of FIG.

9 arrangement 44 consists of a first housing section 45 and a second housing section 46, assembled around a central 5 intermediate station building 4. Under the floor of the first housing section 45 and the second housing section 46, there is a second conduit 47 which conducts polluted air out of the housing section 45 , 46 through a series of holes. The air flows from the second conduit 47 into an exhaust duct 24 to finally run into a common exhaust duct 26 to which all the exhaust air from the housing arrangement is conducted. Both the exhaust duct 24 and the common exhaust duct 26 may be provided with various means 28 for sucking or blowing contaminated air out of the housing sections, but may also be provided with various means for, for example, completely closing the flow and the like. Typically, the extraction is controlled by means of motor controlled dampers. In addition, both the common exhaust duct 26 and the exhaust duct 24 may be provided with means to purify the polluted air before it must be led out of the housing arrangement through a valve 27 in the intermediate station roof. Below the common exhaust duct 26 is a service passage 29 which, like the common exhaust duct 26, extends in the full width of the housing arrangement 44. The service cycle 29 can be used for all relevant aspects of the 25 daily work incl. moving of animals, general review, transport of smaller machines etc. Taken on the first 45 and second housing section 46 is oblique, but with a lower travel than traditional since the ventilation duct systems are under the floor instead of in the space between the ceiling in the housing sections 30 and theirs. roof.

38 DK 177106 B1

The exhaust ducts 24, the common exhaust duct 26, the central intermediate building 4.25, and the valve 27 can be designated as the second section of the ventilation duct system. The second station may also be located completely outside the housing arrangement 1.

5 As mentioned earlier, the first sections of the ventilation duct system are located along the outside of the outer wall of the housing arrangement 1 and are not included in any of the figures. The first section (s) are designed to prevent the ingestion of unwanted objects such as birds, insects, etc., as well as they are screened to avoid rainfall penetration and placed at an altitude so that pest problems such as rats are avoided. Further cleaning of the intake air is also an option if deemed necessary.

15

FIG. 10 schematically shows, in perspective, a housing arrangement 1 with two housing sections 2,3, which discharges polluted air into a common interstate building 4. Each housing section 2,3 contains up to several subsections, for example, the second housing section contains three subsections 5, 6.7 as described in, for example, FIG. 1. In addition, the feed section 13 containing a port 4 8 which provides easy access for a truck and the like is seen here. Both exterior walls and roofs contain a number of windows 49 which ensure daylight inside the housing arrangement 1. Along one of the end walls of the other housing section, a series of doors 50 with associated windows provide additional access to and from the housing, which is the additional advantage thus provided. extra escape routes.

39 DK 177106 B1

Example

Table 1

Stable arrangement concept ~ Moving animals% in terms measured in m to traditional

C

J moving distance.

Traditional stable:

Pregnancy stable for the stable: 74.45 m

Hazard for piglet barn: 89.04 m

Danger stable for running stables: 49.27 m Running stables for pregnant stables: 46.33 m 10 MTH Concept 2: 46 ~ m

Stable divided by piglet barn

Pregnancy house for domestic use: 46 m 38%

Hazard for piglet barn: 63.1 m 29%

Dangerous for the stable: 65.53 m -33% Running stable for the pregnancy stable: 73.75 m -59% MTH Concept 3:

Stable Divided with piglet and gestation barn

Pregnancy house for domestic use: 52.07 m 30%

Hazard for piglet barn: 63.2 m 29%

Dangerous for the stable: 51.2 m -4% 2Q Running stable for the pregnant stable: 34.63 m 25% MTH Concept 4:

Stable divided by piglet and gestation stable, aisle in petting stable and piglet stable + displacement of 11 m:

Pregnancy house for petting stable: 51.7 m 31% 2 5 Petting house for piglet stable: 43.1 m 52%

Running stables for running stables: 55.9 m -13% Running stables for pregnant stables: 34.6 m 25%

Table 1 30 40 DK 177106 B1 The above table 1 shows data from four different pig stables with different devices, and consequently different logistics requirements.

5 The first column indicates the housing concept. The second column indicates how long a pig's average migration path is between. two housing sections, and column three indicates the percentage savings of choosing a given housing arrangement over a traditional housing arrangement (as described in the second row in Table 1).

The largest shortening of the average total moving distance is seen in concept 4. Here is a savings of 31% when moving between gestation and petting stables, a 15% saving of moving between petting stables and piglets and a saving of 25% when moving from running stables to gestation pens. On the other hand, there is an increase in the moving distance of 13% when moving from a petting stable to a stable. Although one of the migration routes has become 20 longer, there is a total saving of 24% compared to a traditional barn with traditional decor. The savings are found by positioning the housing sections favorably relative to one another and by introducing aisles that go across the necessary corridors that exist to ensure the 25 basic opportunity to get around the barn. Furthermore, such crossings have the advantage that it increases the fire safety of the housing arrangement, as the average escape route becomes shorter and that there are several possible ways out of the building. A large part of the shortening of the 30 migration routes is also due to the fact that the piglet housing section and the pregnancy housing section are split into two so that there can be a piglet housing section on each side of the hazardous housing section and that a pregnancy housing section may lie on each side of the breeding stable section. .

The fact that it is possible to reduce so much in the pig's migration path 5 is in itself an advantage, since the production loss due to the migration of especially the piglets is particularly large.

Optionally, various equipment may be placed in the duct ducts to purify air to comply with 10 applicable requirements for both entrained and discharged air.

The ducting duct is traditionally kept clean e.g. via automatic mechanical scraping agents and optionally softeners, conventionally a drag and drop system. Each time a sow is moved, 15 and the area is emptied, it is cleaned which is usually done manually. Ie flushing and disinfection and in this connection the air holes are also cleaned. Ie there is a continuous maintenance of the ventilation system, which prevents the system's capacity to decrease over time due to 20 dirt deposits etc.

Air holes may be screened to prevent clogging, but in an ideal embodiment, it is not necessary.

25

Claims (30)

42 DK 177106 B1 Requirements. A method of replacing at least a portion of the air in at least a portion of a building defining an interior space with at least a circumferential wall, roof and floor, the method comprising the steps of a first station outside the building; conducting a first amount of air into the interior space of the building via at least one first conduit 10 extending (23a) extending longitudinally spaced apart from the number of first holes (30) extending through at least one extending beneath the floor of the building say a second conduit (23b) formed with a longitudinally spaced apart number of second holes 15 (31) conducting a second amount of air from the interior space of the building to a second station outside the building, characterized in that - the first conduit (23a) and the second conduit (23b) have a common wall arranged between the first conduit (23a) and the second conduit (23b) so that the first conduit the cross section of the conduit (23a) is reduced in the direction from the first end of the first conduit (23a) towards the second end of the first conduit (23a), 25. the cross section of the second conduit (23b) is reduced in the direction from the first end of the second conduit channel (23b) towards the second end of the second conduit (23b), and - the first end of the first conduit (23a) faces the second end and / or vice versa of the second conduit (23b). 43 DK 177106 B1 A method according to claim 1, characterized in that the method comprises the step of directing the second amount of air from the interior space of the building to the second station outside the building via one or more intermediate stations. 5 Process according to any one of claims 1 or 2, characterized in that the exchange of air takes place continuously, at fixed intervals or for a fixed period of time, optionally for a defined time interval. 10 Process according to any one of the preceding claims 1-3, characterized in that the air to be exchanged has a content of at least one gaseous or particulate contaminant. Method according to any one of the preceding claims 1-4, characterized in that the air which is supplied to the inner space via the first conduit (23a) has an additive content. Process according to claim 5, characterized in that the additive is selected from the group comprising means for bonding dust in the air in the interior space, ozone, airborne or air-soluble drugs, air cleaners and fragrances. Method according to any one of the preceding claims 1-6, characterized in that the first and / or second amount of air is respectively conveyed to and from the interior space of the building by means of pumping means or suction means (28). Method according to any one of the preceding claims 1-7, characterized in that the first and / or second amount of air constitutes a subset of the total air volume of the interior space. 44 DK 177106 B1 Method according to any one of the preceding claims 1-8, characterized in that the air which is conducted to the interior space is temperature controlled. 5 A housing section (2,3,45,46) in the form of a building defining, with at least one circumferential wall, a roof and a floor, an interior space, the housing section (2,3,45,46) comprises an outside housing section ( 2,3,45,46) arranged first station to conduct a first amount of air into the interior space of the housing section via at least one first conduit (23a) extending longitudinally below the floor of the housing section, number of first holes (30), and 15 - at least one second duct (23b) extending beneath the floor of the housing section (2,3,45,46), which is formed with a longitudinally spaced apart number of second holes (31) to conducting a second amount of air from the interior space of the housing section to a second station arranged outside the housing section 20, characterized in that a first conduit (23a) and a second conduit (23b) have a common wall arranged between the first conduit (23a) and the second conduit (23b) thus 25. reducing the cross-section of the first conduit (23a) in the direction from the first end of the first conduit (23a) toward the second end of the first conduit (23a), reducing the cross-section of the second conduit (23b) in the direction of the first end of the second conduit (23b) 30 toward the other end of the second conduit (23b), and The first end of the first conduit (23a) faces the second end and / or vice versa of the second conduit (23b). Stable section (2,3,45,46) according to claim 10, characterized; in that one or more intermediate stations can direct the second amount of air from the interior space of the housing section to the other station outside the housing section. The housing section (2,3,45,46) according to claim 10 or 11, characterized in that the housing section (2,3,45,46) comprises a plurality of deflection channels (22) extending below the housing section (2,3,45). , 46) a floor substantially parallel to at least one of the first and / or second conduit 15 (23a, 23b) and the first and second holes (30, 31) of the at least one first and second conduit (23a, 23b, respectively). ) is arranged in fluid communication with the vent channel (22). The housing section (2,3,45,46) according to claim 12, characterized in that the deflection ducts (22) and the first and / or second conduit ducts (23a, 23b) have a common wall (34,36). Stable section (2,3,45,46) according to claim 12 or 13, 25, characterized in that the outlet ducts (22) and the first and / or second conduit ducts (23a, 23b) are spaced apart and arranged in fluid communication via pipes extending between the first and / or second holes (30, 31) and the ducting channels (22). 30 Stable section (2,3,45,46) according to claim 12, 13 or 14, characterized in that a deflection channel (22) and an associated The first or second conduit (23a, 23b) is dimensioned and arranged relative to each other to prevent solid waste from the housing section from entering the first and / or second conduit (23a, 23b), respectively. 5 A housing section (2,3,45,46) according to any one of claims 10 to 15, characterized in that the housing section (2,3,45,46) is designed for pig breeding and has an interior space in which the air to be replaced is provided. has a content of at least one gaseous contaminant such as ammonia, and / or at least one particulate contaminant such as dust. Stable section (2,3,45,46) according to any one of claims 10 - 16, characterized in that the first conduit (23a) can conduct 15 air containing an additive to the interior space, wherein the additive is optionally selected from the group includes means for bonding dust in the air in the interior space, ozone, airborne or air-soluble drugs, air cleaners and fragrances. 20 Stable section (2,3,45,46) according to any one of claims 10 - 17, characterized in that pump means, suction means or blowing means (28), optionally controlled by motor controlled dampers, can conduct the first and / or second amount of air 25 respectively. to and from the interior section of the stables section. Stable section (2,3,45,46) according to any one of claims 10 - 18, characterized in that the first and / or second amount of air constitutes a subset of the total air volume of the interior space. 30 47 DK 177106 B1 Stable section (2,3,45,46) according to any one of claims 10 - 19, characterized in that the air which can be led into the interior space is temperature controlled. A housing section (2,3,45,46) according to any one of claims 10 to 20, characterized in that the housing section (2,3) is arranged to be expandable at least in the first and second conduit channels (23a, 23b). ) longitudinal direction. Housing section (2,3,45,46) according to any one of claims 10 - 21, characterized in that at least one of the holes (30, 31) in the first and / or the second conduit passage extends obliquely through the respective conduit channel wall in the flow direction of the flowing air and / or 15 obliquely in the direction towards that floor (18). A housing arrangement (1.44) comprising at least two spaced apart housing sections (2,3,45,46) according to any one of the preceding claims 11-23, wherein the method 20 according to any one of the preceding claims 1-10 is used. characterized in that the second stations of the at least two housing sections (2,3,45,46) are arranged in or open in the same discharge building (4.25), preferably a discharge tower with an upwardly extending discharge end. 25 Housing arrangement (1.44) according to claim 23, characterized in that the housing arrangement (1) comprises at least four housing sections arranged substantially symmetrically around the discharge building (4.25). 30 A housing arrangement (1.44) according to claim 23 or 24, characterized in that the housing arrangement (1) comprises a plurality of 48 DK 177106 B1 housing sections (2,3,45,46) arranged for various stages of animal breeding, including one or more housing sections (2,3,45,46) adapted for pregnant animals, a housing section (2,3, 45,46) for small animals, a housing section 5 2,3,45,46) for growing up, a danger section, a housing section for insemination and a housing section (2,3,45,46) for random isolation of animals. A ventilation duct system (23) for replacing at least 10 a portion of the air in at least a part of a building which defines, with at least one circumferential wall, a roof and a floor, an interior space the ventilation duct system (23) comprises a first conduit duct ( 23a) formed with a longitudinally spaced apart number of first 15 holes (30), a second conduit (23b) formed with a longitudinally spaced apart number of second holes (31), first means for sucking, pumping or blowing a first amount of air into a building through the first holes (30) through a first end of the first 20 conduit, second means for sucking, pumping or blowing through a first end of the second conduit a second quantity of 25 air out of the building's internal space through the second holes (31), wherein the first means and the second means are the same or different, characterized in that a first conduit (23a) and a second conduit (23b) have a common wall arranged between the first conduit 30 (23a) and the second conduit (23b) thus 49 DK 177106 B1 reduces the cross-section of the first conduit (23a) in the direction from the first end of the first conduit (23a) towards the second end of the first conduit (23a), that the cross-section of the second conduit (23b) is reduced in the direction from the second conduit (23b) first end toward the second end of the second conduit (23b) and the first end of the first conduit (23a) facing the second end and / or vice versa of the second conduit (23b). 10 Ventilation duct system (23) according to claim 26, characterized in that the first holes (30) or the second holes (31) are formed in the side or the region of the first conduit duct (23a) or the second duct duct 15 (23b, respectively). facing the inner space. Ventilation duct system according to claim 26 or 27, characterized in that the angle between the common wall (34,36) and a longitudinal flow axis of a conduit is constant for the entire length of the conduit. Ventilation duct system (23) according to any one of claims 26 - 28, characterized in that the cross-section of the first and / or second conduit ducts (23a, 23b) has a circumferential outline, which is at least partially circular, oval, elliptical. square, rectangular, or polygon. Ventilation duct system (23) according to any one of claims 26 29, characterized in that at least one of the first duct duct (23a) and the second duct duct (23b) is constructed of a plurality of serially connected duct duct DK 177106 B1 sections (23 '). ), and preferably both are constructed of serially connected conduit sections (23 ').