FR3079108A1 - VENTILATION DEVICE FOR FARM BUILDING, ESPECIALLY FOR ANIMAL HUSBANDRY, COMPRISING A HEAT EXCHANGER AND MEANS FOR HEATING THE AIR - Google Patents

Abstract

The invention relates to a ventilation device (10) intended to equip a livestock building (90, 91), comprising a housing (1) and at least one heat exchanger block (4), the housing (1) being provided with an outside air intake (2), a heated air outlet (2a), an indoor air intake (3) and a cooled air outlet (3a), said at least one heat exchanger block (4) being able to thermally contact a first flow (A) of air coming from the outside air intake (2) with a second flow (B) of air coming from said indoor air intake (3). According to the invention, the ventilation device (10) further comprises an auxiliary air outlet (5) disposed on said casing (1), air heating means (8) and deflection means adapted to directing said second incoming airflow (B) to the location of said inner air intake (3): - through said at least said heat exchanger block (4) to said cooled air outlet (3a) according to a first air circuit (C1), - through the heating means (8) to said heated air outlet (2a) according to a second air circuit (C2), or - directly to said auxiliary air outlet (5) according to a third air circuit (C3).

Description

Ventilation device for a livestock building, in particular for poultry farming, comprising a heat exchanger and air heating means

1. Field of the invention

The invention relates to the field of design and production of equipment intended to equip livestock buildings, in particular poultry livestock buildings, that is to say poultry buildings.

More specifically, the invention relates to a ventilation device fitted to such buildings of the type comprising an air-air type heat exchanger.

The invention also relates to a livestock building, poultry in particular, comprising such a device, or more, and a method of using such a device, or more within a livestock building, poultry in particular .

2. Prior art

The breeding buildings, especially poultry, accommodate, for each breeding campaign, a large number of animals.

These should be raised in a healthy atmosphere and at a relatively high temperature.

For example, in the case of poultry, this temperature is generally between 25 ° C and 35 ° C depending on the type and age of the poultry.

In addition, in poultry farms, the environment must always be adapted to the physiological stage of the animals.

Thus, the heating needs are very important in the start-up phase of growth (or endothermic phase) because the chicks are unable to ensure their thermoregulation in the first days of their life. During this phase, a renewal of the indoor air is also necessary.

Heating is no longer necessary from a certain age (except when the outside air temperature is low) but the ventilation needs are high due to the heat produced by the animals (exothermic phase).

Maintaining the temperature is therefore one of the constant concerns of breeders. Indeed, any excessive drop or rise in temperature in a livestock building can lead to excess mortality of animals. This problem is particularly noticeable with poultry.

In addition, poor ventilation of buildings can also lead to an increase in the humidity level in them, which is conducive to the propagation of microorganisms as well as an increase in the ammonia rate resulting from the decomposition of droppings. Such phenomena can lead to the need to renew the litters on which animals are bred more often but also to an excess mortality.

Thus, to obtain a poultry farm in a healthy atmosphere and at relatively stable temperatures, the livestock buildings generally include ventilation installations whose objective is to bring in enough fresh outside air inside the building , in order to maintain a certain temperature, renew the air and supply the necessary oxygen to the poultry, and obtain acceptable levels of humidity, gas, dust and odors.

The ventilation of poultry rearing buildings is carried out by air extractors located on one side of the building and / or in gables, which take the form of exhaust fans (ensuring dynamic ventilation by depression) of stale air from the inside to the outside of the building, and by exterior air intake or inlet hatches distributed on the opposite side (s) of the building and / or in gables. For large buildings, it is known to use extraction chimneys whose maintenance (cleaning and disinfection) is tedious.

This type of system requires creating a sufficient vacuum to generate air speed at the hatches in order to obtain an air stream going up towards the ridge of the building so as to capture the calories located at the ceiling. The objective is to heat the incoming air which is colder than that of the building so that it does not fall directly on the animals, without creating air speed on them.

However, this ventilation mode requires precise adjustment of the hatches according to atmospheric conditions and regular adjustments of the openings over time.

Furthermore, in frequent cases where the interior of livestock buildings must be heated, the supply of cold outside air through such hatches contributes to lowering the temperature prevailing in the building and implies an additional energy cost to maintain it. ci high enough.

To achieve these objectives of optimal management of the atmosphere, technical means are implemented: heating (such as gas radiators distributed in the building), hot air guns, ventilation and, for a few years, devices for recovering air-to-air heat.

These air-air type heat recovery devices make it possible to heat outside air blown into the building by recovering part of the calories from the hot exhaust air extracted from the building.

However, it is very difficult to obtain good ambient results and temperature uniformity in the building when ventilation and heating are designed independently.

Indeed, to guarantee a homogeneous atmosphere, there must be consistency between ventilation and heating, and be able to anticipate the renewal of air and heating.

3. Objectives of the invention

An objective of the present invention is to at least partially overcome the drawbacks of the prior art.

In particular, an objective of at least one embodiment is to provide a device making it possible to simplify the management of the atmosphere within a poultry breeding building and to obtain temperature uniformity in the building by limiting the additional energy cost.

Another objective of at least one embodiment of the invention is to provide a device making it possible to heat the volume of the poultry breeding building and to renew the air by supplying the oxygen necessary to the poultry to ensure comfort and well-being of the latter.

Another objective of at least one embodiment of the invention is to provide such a device which can be adapted to all phases of poultry breeding in order to limit production costs, and which improves the transition phase between the endothermic and exothermic phases.

Another objective of at least one embodiment of the invention is to provide such a device which is of simple structure, that is to say with a limited number of parts.

Yet another objective of at least one embodiment of the invention is to provide such a device which can be implemented in different types of above-ground breeding facilities (for cattle, goats, pigs, poultry and rabbits in particular, but not exclusively).

Yet another objective of at least one embodiment is to provide a device which is simple to use and inexpensive to implement.

4. Statement of the invention

These objectives, as well as others which will appear in the following of this description, are achieved by means of a ventilation device, intended to equip a livestock building, comprising a casing and at least one heat exchanger block. heat, the casing being provided with an outside air intake, a heated air outlet, an indoor air outlet and a cooled air outlet, said at least one heat exchanger block being able to put in thermal contact a first air flow coming from the outside air intake with a second air flow coming from said inside air intake.

According to the invention, the device further comprises an annex air outlet disposed on said casing, air heating means and deflection means capable of directing said second flow of incoming air at the location of said indoor air intake:

- through said at least said exchanger block to said outlet for air cooled in a first air circuit,

- through the heating means to said outlet for air heated according to a second air circuit, or

- Directly to said annex air outlet according to a third air circuit.

The ventilation device according to the present invention implements a heat exchanger and heating means, and comprises a heat exchange circuit between the air entering and the air leaving a poultry farm building integrating the 'exchanger, a circuit for extracting the air inside the building which does not pass through the exchanger block and which can be used as required and a recycling circuit which integrates the heating means.

The implementation of movable flaps ensures the modularity of the device in the sense that the latter can perform the functions of heat exchange alone, heat exchanger and heating or extraction, extraction only (if the building humidity is too low), or heating only.

The operating mode is chosen according to the animals' air renewal needs and the temperature of the building.

Heating is preferably a priority and can be implemented gradually or in all or nothing.

In other words, the stale interior air from the building extracted by the device can be used to heat the fresh air entering the device (and therefore in the building) and / or be directed directly to the outside of the building. It can also be recycled.

The extraction circuit of the device can be used independently of the heat exchange circuit or in addition to the latter (to dehumidify the indoor air in the latter case).

Therefore, this simplifies the management of the atmosphere within a livestock building, in particular poultry breeding, and to obtain a temperature uniformity in the building because it suffices to select, depending on predetermined parameters, such as the temperature inside the building and the needs for indoor air renewal, the appropriate air circuit.

In addition, by this modularity, a device is provided which can be used during the different phases of poultry farming.

During the endothermic and exothermic phases of breeding, the comfort and well-being of poultry are ensured.

In a particular embodiment of the invention, the deflection means comprise:

a first movable flap between a closed position and an open position of said cooled air outlet,

a second movable flap between a closed position and an open position of said annex air outlet, and

- A third movable flap between a closed position and an open position of the passage between said interior air intake and said heated air outlet.

According to a particular aspect of the invention, the device comprises means for moving each of said movable flaps between an open position and a closed position allowing:

to open the second movable flap and to close the first and third movable flaps in a mode of operation known as the extraction of air from said device,

to open the third movable flap and to close the first and second movable flaps in a so-called recirculation and air heating operating mode of said device,

to close the third movable flap and to open the first and second movable flaps in a so-called heat exchange and air extraction operating mode of said device,

- to close the second and third movable flaps and to open the first movable flap in operating modes known as heat exchange with or without air heating of said device.

According to one aspect of at least one embodiment, the device comprises means for activating / deactivating the heating means able to activate the latter in the operating mode known as heat exchange with heating of the device and in the mode operating mode of recycling and heating the device's air.

According to another aspect of at least one embodiment, the device comprises means for circulating air through each of said circuits.

According to a particular aspect of the invention, the device comprises at least one filter placed at the location of the indoor air intake.

Thus, by implementing at least one filter at the location of the indoor air intake, which makes it possible to purify the air which comes from the building, it is avoided that the ventilation device is damaged.

Indeed, the air extracted from such a poultry breeding building is loaded with dust coming partly from the litter boxes and partly from the animals themselves.

In order to prevent this dust from being deposited in excessive quantity within the ventilation device and clogging it, it may therefore be important to filter the second air flow.

According to a particular embodiment of the invention, the device further comprises indirect combustion heating means.

Therefore, this overcomes the calorific deficiencies if it is necessary to heat the first air flow even more than what the second air flow provides in heat energy.

The indirect combustion heating means are relatively simple to implement within such a device and at the same time space-saving.

In addition, the use of indirect combustion heating means makes it possible to limit, or even eliminate, the contributions of carbon dioxide inside the building.

Finally, indirect combustion also makes it possible, thanks to the rejection of the burnt gases, to partially recover calories.

According to a particular aspect of the aforementioned embodiment, the indirect combustion heating means can be gas heating means.

The invention also relates to a poultry farm building comprising a plurality of ventilation devices as described above, said devices being arranged on at least one longitudinal side of said building, the building further comprising at least one turbine or one fan. extraction of indoor air located on at least one of the gables of said building or on at least one longitudinal side of said building.

According to a particular embodiment, the devices are distributed on the two longitudinal sides of the building, opposite or staggered.

According to another embodiment, said devices and several turbines or exhaust fans are distributed alternately on a longitudinal side of said building.

The fact of distributing the various devices on the sides of the building in a uniform manner makes it possible not to have a heating or a renewal of concentrated air at one point of the building.

This therefore promotes uniformity of the interior atmosphere of the building.

In addition, this avoids creating an area in which the speed of incoming or outgoing air flow is excessive.

This also promotes a lowering of the ammonia content and the humidity of the indoor air in a uniform manner.

According to a particular aspect of the invention, the building also comprises a regulation system comprising:

- at least one memory for storing the air renewal needs of animals according to their age,

- at least one sensor for measuring the interior temperature of said building, and

- a control interface for each heat exchange device which selects, according to the measured temperature and the stored air renewal needs, the operating mode of the device from the operating mode known as air extraction , the operating mode called recirculation and air heating, the operating mode called heat exchange and air extraction, and the operating modes called heat exchange with or without space heating air. In this way, it is easier for a user of such a poultry farm building to control the ambient conditions of farming and thus control the welfare of the animals.

The extraction alone can be used during the endothermic or exothermic phase in the event that the humidity is too low.

The invention also relates to a method of using at least one ventilation device as described above within a poultry farming building as described above, the method comprising the following steps:

- During a first phase of animal rearing, said endothermic phase, ventilation and heating of said building using said at least one ventilation device; and

- During a second phase of animal rearing, known as the exothermic phase, ventilation of said poultry building using said at least one turbine or said at least one extraction fan, and heating of said building using said at least a ventilation device.

The invention also relates to a computer program, comprising program code instructions for implementing the above method, when said program is executed on a computer.

Finally, the invention relates to a computer-readable and non-transient storage medium, storing a computer program comprising a set of instructions executable by a computer or a processor for implementing the aforementioned method.

5. List of Figures

The invention, as well as the various advantages which it presents, will be more easily understood, in the light of the description which follows of an illustrative and non-limiting embodiment thereof, and of the appended drawings among which:

Figures 1 and 2 are schematic perspective views of a poultry farm building using several heat exchange devices according to the invention, according to two embodiments;

Figures 3 to 8 are perspective views of a ventilation device according to an embodiment of the invention;

Figure 9 is a block diagram of an operating mode of a ventilation device according to the embodiment illustrated in Figures 3 to 8, and Figure 10 is a block diagram of an operating mode of another ventilation device.

6. Detailed description of an embodiment of the invention

Figures 1 and 2 schematically illustrate a poultry farm building comprising a plurality of ventilation devices 10 according to the invention distributed along one or two opposite longitudinal facades of the building.

The ventilation devices 10 make it possible to heat outside air blown into the building with hot, more humid air extracted from the building.

Such exchangers make it possible to greatly limit the additional energy cost generated by the ventilation of the livestock building.

An embodiment of such a ventilation device 10 is detailed below.

Each ventilation device 10 of the livestock building comprises a casing 1 which has an outside air intake 2 oriented towards the exterior of the building, a heated air outlet 2a oriented towards the interior of the building, an intake indoor air 3 oriented towards the interior of the building, a cooled air outlet 3a oriented towards the outside of the building, and also an annex air outlet 5 oriented towards the outside of the building.

The casing 1 comprises an exchanger module and a heating module juxtaposed.

It also includes air circulation means 7 taking the form of two fans, one for extraction and one for blowing.

The exchanger module comprising one or two exchanger blocks 4, in this case two in the example illustrated.

The heating module comprises the heating means 8.

These exchange blocks, or exchanger blocks, 4 are able to put in thermal contact a first air flow A coming from the outside air intake 2 with a second air flow B coming from the inside air intake 3, so as to heat the first air flow A by heat exchange with the second air flow B.

The outside air intake 2 and the heated air outlet 2a form a circulation circuit for the first air flow A, corresponding to the air flow coming from outside the building which arrives in the ventilation device 10 .

The second air flow B, corresponding to the air flow coming from inside the building which arrives in the ventilation device 10, can be directed in different circulation circuits.

Indeed, the second air flow B entering at the location of said interior air intake 3 can circulate within the ventilation device 10:

- through said at least said exchanger block 4 to said cooled air outlet 3a according to a first air circuit C1,

- through the heating means 8 to said heated air outlet 2a according to a second air circuit C2, or

- Directly to said annex air outlet 5 according to a third air circuit C3.

In other words, the second air flow B can either use the first air circuit Cl to heat the first incoming air flow A and then exit the ventilation device 10 without returning to the building, or use the second air circuit C2 to be heated and return to the building, or use the third air circuit C2 to be directly evacuated from the ventilation device 10 without returning to the building and without heating the first air flow A.

Thus, the second air flow B coming from the interior air intake 3 is directed either towards the outlet of cooled air 3a, or towards the outlet of annex air 5, or towards the outlet of heated air 2a.

It should be noted that, when the second air flow B is directed entirely towards the annex air outlet 5, it does not pass through the exchange blocks 4, but goes directly towards the outside of the device ventilation 10 10. In this case, it therefore does not heat the first air flow A coming from the outside.

This redirection is effected by means of deflection, here taking the form of flaps or hatches 6a, 6b, 6c movable driven by motors and which are capable of directing the second air flow B coming from the intake d indoor air 3 to the cooled air outlet 3a, the annex air outlet 5 or the heated air outlet 2a.

In other words, the flaps 6a, 6b, 6c make it possible to circulate the second air flow B coming from inside the building, towards the cooled air outlet 3a or the annex air outlet 5 or towards the heated air outlet, depending on the desired configuration.

In this embodiment, the ventilation device 10 comprises means for moving each of said movable flaps 6a, 6b, 6c between an open position and a closed position allowing:

to open the second movable flap 6b and to close the first 6a and third 6c movable flaps in a mode of operation known as the extraction of air from said ventilation device 10,

to open the third movable flap 6c and to close the first 6a and second 6b movable flaps in a so-called operating mode of recycling and heating of air of said ventilation device 10,

to close the third movable flap 6c and to open the first 6a and second 6b movable flaps in a so-called heat exchange and air extraction operating mode of said ventilation device 10,

to close the second 6b and third 6c movable flaps and to open the first 6a movable flap in operating modes known as heat exchange with or without air heating of said ventilation device 10.

In other words, as illustrated in particular in FIG. 9:

- In an air extraction mode, the second air flow B borrows the third air circuit C3 formed in the ventilation device in which the second movable flap 6b is open and the first 6a and third 6c movable flaps are closed ;

- In an air recycling and heating mode, the second air flow B borrows the second air circuit C2 formed in the ventilation device in which the third movable flap 6c is open and the first 6a and second 6b movable shutters are closed;

- In a heat exchange and air extraction mode, the second air flow B borrows the first air circuit C1 formed by the ventilation device in which the third movable flap 6c is closed and the first 6a and second 6b movable flaps are open, while the first air flow A circulates in the ventilation device according to the planned path;

- In a heat exchange mode with or without air heating, the second air flow B borrows the first air circuit C1 formed by the ventilation device in which the second movable flap 6b is open and the first 6a and third 6c movable flaps are closed, while the first air flow A circulates in the ventilation device according to the planned path.

According to an alternative embodiment, the deflection means can for example take the form of valves configured to distribute the second air flow B in desired proportions between the cooled air outlet 3a, the heated air outlet 2a, and Annex 5 output.

For example, such a distribution can be defined to heat the first air flow A to a given temperature before it enters the building, the amount of second air flow B which is not necessary to obtain said the defined temperature is then redirected to the annex 5 air outlet.

It should be noted that, in this embodiment, the ventilation device 10 comprises a filter 14 placed at the location of the indoor air intake 3.

In fact, the air extracted from the poultry breeding building by the indoor air intake 3 being loaded with dust, originating in particular from the litter on which the animals evolve, but also from the animals themselves (feathers or down for example), it may be desirable for the proper functioning of the ventilation device 10 and to limit the maintenance costs that this dust does not deposit in too large a quantity on the exchanger blocks 4.

It is also desirable that this dust does not accumulate and, for example, obstruct air passages.

The filter 14 placed at the location of the interior air intake 3 therefore makes it possible to purify the air coming from the building shortly after entering the ventilation device 10 and therefore to limit the risks of accumulation of dust in the ventilation device 10 and fouling of the exchanger blocks 4.

This filter 14 can, for example, be removable so that it can be regularly disassembled and cleaned, or changed.

There could also be embodiments in which several filters are placed one after the other so as to further limit the risk of dust intrusion into the ventilation device 10.

One could also provide one or more filters placed at the location of the outside air intake 2 so as to also purify the air coming from the outside and which could, for example, be loaded with dust, or other unwanted particles.

Such filters could make it possible to avoid fouling of the exchanger blocks 4 but also to limit the risk of propagation of undesirable elements, such as bacteria, inside the building when this first flow of air A enters, after its passage in the ventilation device 10, in the poultry farm building.

In this embodiment, the means 8 for heating the ventilation device 10 are indirect combustion heating means.

These indirect combustion heating means have the advantage, compared to direct combustion heating means, of not causing an addition of CO2 inside the poultry farm building, which would obviously be harmful. for indoor poultry.

In addition, such heating means have the advantage, compared to hot water batteries for example, to have relatively small dimensions.

In this embodiment, the indirect combustion heating means operate on gas.

Gas technology offers an interesting reactivity at a reasonable cost and requires simple means of implementation.

The indirect combustion heating means comprise, in this embodiment, a chimney 81 making it possible to reject the burnt gases.

Details are given hereinafter in relation to FIGS. 3 to 8, the geometric characteristics of a ventilation device 10 according to the invention.

In this ventilation device 10, the heating means 8, of rectangular shape, are placed substantially in the center of the device. On the top of this heating unit, a chimney 81 for extracting the burnt gases is provided.

This extraction chimney 81 passes “through” the interior air intake 3 which is therefore formed in the casing 1 and placed above the means 8 of indirect combustion heating.

At the front face of the heating means 8, the heated air outlet 2a is formed in the casing 1. The outside air intake 2 is itself formed on the casing 1 at one face of the blocks exchanger 4.

These exchanger blocks 4 are placed in the device on the right and left faces of the heating means 8 with indirect combustion.

The first air flow A thus arrives in the ventilation device 10 through the outside air intake 2 and passes through the exchanger blocks 4 and then comes out through the heated air outlet 2a towards the interior of the building. Before leaving through the heated air outlet 2a, the first air flow passes through the heating means 8 with indirect combustion which, when they are lit, make it possible to provide additional calories and therefore to heat the first flow d air brought into the building.

For its part, the second air flow B comes from the interior air intake 3 and, depending on the configuration of these deflection means, goes to one of the three circuits provided.

Such a ventilation device 10 can, in practice, treat air flow rates of between 1 and 4000 m ³ per hour.

In this embodiment, the ventilation device 10 has a length of the order of 1.75 meters for a height of the order of 1.40 meters and a thickness of the order of 0.7 meters.

However, devices with different dimensions could be used which are suitable for heat exchange within a poultry farm building.

As described above, in support with FIGS. 1 and 2, the livestock building can adopt several configurations according to the needs of the users, in particular in terms of air conditioning or according to the type of animals present.

FIG. 1 illustrates an embodiment of a livestock building in which the ventilation devices 10 are distributed on a longitudinal side of the building 90 alternately with exhaust fans 20.

In this embodiment, the air inlet hatches are placed on the opposite longitudinal side of the building, that is to say in front of the ventilation devices so as to implement a so-called lateral ventilation.

FIG. 2 illustrates an embodiment of a livestock building in which the ventilation devices 10 and the air inlet hatches are distributed on two longitudinal sides of the building 91. In this case, turbines d 'extraction 20 are placed on at least one of the gables of the building so as to implement a ventilation called bi-lateral and longitudinal ventilation.

Here, the ventilation devices 10 are staggered. One could however imagine an embodiment in which the devices are placed opposite.

This distribution of the ventilation devices makes it possible to heat the entire volume of the building in a homogeneous manner and thus to obtain a uniformity of temperature and atmosphere within the building.

In addition, the fact that the ventilation and heating powers are distributed over the entire length of the building makes it possible not to have a large flow of concentrated air at one point but on the contrary a homogeneous distribution of the air flows in the building. , without causing discomfort to poultry.

Consequently, with an adequate number of ventilation devices in the building in relation to the number of animals present, the entire endothermic ventilation phase can be done with the exchange devices located on the side or sides of the building (phase during which it is necessary to heat the building - that is, when the animals do not produce enough heat).

Then, it is simpler to manage the ventilation necessary to manage the temperature with the extraction turbines located at the gables of the building (Figure 2) to create air speed on the animals (exothermic phase)

Switching from bi-lateral to longitudinal ventilation (Figure 2) is less risky when the animals are feathered and there is no longer any need for heating.

However, if the longitudinal ventilation has started and the temperature drops at night, the ventilation devices can be used without disturbing the ventilation.

In each of the two embodiments, the hatches are shown in dotted lines.

The poultry farming building also has at least one regulation system 11 comprising:

- a microprocessor and a storage memory storing in particular the air renewal needs of poultry according to their age in particular,

a plurality of sensors C for measuring the interior temperature of the building, and

a control interface for a control unit associated with each ventilation device which selects the operating mode of the corresponding ventilation device from among the five possible, by playing on the shutters, the air circulation means and the means of heater.

With this regulation system 11, it is possible to continuously monitor the temperature inside the building thanks to the temperature measurement sensors C, and to provide the appropriate response in terms of heating and air flow. , as a function of the temperature measured by the sensors C (FIG. 1) and the needs for renewal of air (and therefore oxygen) of the animals respectively.

Indeed, in the case where the interior temperature measured is lower than the desired temperature, the control interface can control the flaps 6a, 6b, 6c of each ventilation device to reduce the amount of second air flow A which emerges by the annex 5 air outlet and increase the quantity of second air flow A which comes out through the cooled air outlet after passing through the exchanger block 4.

The control interface can also be adapted to start the indirect combustion heating means so as to provide additional heat energy.

In the case where the interior temperature measured is higher than the desired temperature, the control interface can, unlike previously, control the flaps 6a, 6b, 6c to reduce the amount of second air flow A which comes out through the cooled air outlet and therefore increase the amount of second air flow A which comes out through the annex 5 air outlet.

The regulation system 11 centralizes all the data collected by the sensors for measuring the interior temperature of the building and can control all or part of the ventilation devices fitted to the building to increase or decrease the interior temperature (if the conditions are satisfactory, the system can maintain the existing settings) by adjusting the heating and ventilation.

Such a regulation system makes it possible to guarantee a homogeneity of the atmosphere within the building by ensuring consistency between the ventilation of the building and the heating of the building, and guarantees a desired temperature value within the building at a given time.

It makes it possible to provide a quick response if the interior temperature is not satisfactory, or even to anticipate air renewal and heating.

In a variant, provision could be made for the regulation system 11 to include an independent control interface for each of the ventilation devices 10.

We could also provide embodiments in which the regulation system 11 measures and regulates other parameters of the building, such as humidity, CO2 content, pressure, or any other parameter useful for maintaining a optimal environment for poultry farming.

One could also provide other embodiments in which the regulation system would include a single sensor C for measuring the interior temperature of the building.

We will now describe the method of using at least one heat exchange device as described above within the poultry farm building of FIG. 2, for example, the method comprising the following steps:

during a first phase of animal rearing, known as the endothermic phase, ventilation and heating of said building using said at least one ventilation device 10, and

- during a second phase of animal rearing, known as the exothermic phase, ventilation of said poultry building using said at least one extraction turbine 20 and heating of said building using said at least one ventilation device 10.

Thus, during the first phase of starting the growth of poultry, also called endothermic phase, the heating needs are very important because the chicks are unable to ensure their thermoregulation in the first days of their life. The method according to the invention therefore makes it possible, during this phase, to ensure a renewal of the indoor air and the maintenance of an adequate indoor temperature. The ventilation devices 10 provide minimum ventilation without excessive air speed on the animals.

During the second phase of animal husbandry, heating is no longer necessary (except when the outside air temperature is low, which can be the case at night) but the ventilation needs are important due to the heat produced by poultry. The extraction turbine (s) located at the gables of the building are then used, and the indoor air is heated if necessary (when the outside air temperature is low, at night for example).

So as to precisely regulate the interior temperature, in particular during the first phase of breeding which is the most delicate, the process comprises the following successive stages:

- Reception by said regulation system 11 of at least one piece of interior temperature information of the building measured by said at least one temperature sensor C (dotted arrow in FIG. 1);

- as a function of said at least one piece of temperature information received and of the needs for air renewal stored in storage means, sending by said regulation system 11 of a command for adjusting the deflection means of said at least one device for ventilation 10, so as to direct said second air flow B entering at the location of said interior air intake 3 towards said cooled air outlet 3a or said annex air outlet 5 or the heated air outlet 2a

So as to implement the method as described above, the invention also relates to a computer program product, comprising program code instructions for implementing the method when said program is executed on a computer.

The invention also relates to the computer-readable and non-transient storage medium, storing a computer program comprising a set of instructions executable by a computer or a processor for implementing the aforementioned method.

It should be noted that the device of the invention can be used for preheating the building before the arrival of the chicks so as to bring the interior temperature to a value of the order of 34 ° C. for example.

FIG. 10 is a block diagram of an operating mode of another ventilation device 10.

The latter differs from that previously described in that it does not implement a second movable flap 6b, nor an annex air outlet 5 (there is therefore no provision for a third air circuit C3).

An exhaust fan independent of the ventilation device 10 can be provided in the building.

This ventilation device 10, intended to equip a livestock building, comprises a casing 1 and at least one heat exchanger block 4, the casing 1 being provided with an outside air intake 2, an outlet for heated air 2a, an interior air intake 3 and a cooled air outlet 3a, said at least one heat exchanger block 4 being able to put in thermal contact a first flow A of air coming from the outside air intake 2 with a second flow B of air coming from said interior air intake 3.

The ventilation device 10 further comprises air heating means 8 and deflection means capable of directing said second air flow B entering at the location of said interior air intake 3:

- through said at least said exchanger block 4 to said cooled air outlet 3a according to a first air circuit C1, or

- Through the heating means 8 to said heated air outlet 2a according to a second air circuit C2.

The means of diversion include:

a flap 6a movable between a closed position and an open position of said cooled air outlet 3a,

- Another flap 6c movable between a closed position and an open position of the passage between said interior air intake 3 and said heated air outlet 2a.

The ventilation device 10 comprises means for moving each of said movable flaps 6a, 6c between an open position and a closed position allowing:

to open the movable flap 6c and to close the movable flap 6a in an operating mode known as recycling and heating the air of said ventilation device 10,

to close the movable flap 6c and to open the movable flap 6a in operating modes known as heat exchange with or without air heating of said ventilation device 10.

The ventilation device 10 comprises means for activating / deactivating the heating means 8 able to activate the latter in the operating mode known as heat exchange with heating of said ventilation device 10 and in the operating mode known as recycling and heating the air of said ventilation device 10.

Such a ventilation device 10 can comprise at least one filter 14 placed 5 at the location of the interior air intake 3.

Claims (13)

1. Ventilation device (10), intended to equip a livestock building (90, 91), comprising a casing (1) and at least one heat exchanger block (4), the casing (1) being provided with an outside air intake (2), a heated air outlet (2a), an indoor air outlet (3) and a cooled air outlet (3a), said at least one heat exchanger block (4) being able to put in thermal contact a first flow (A) of air coming from the outside air intake (2) with a second flow (B) of air coming from said intake indoor air (3), the ventilation device (10) being characterized in that it further comprises an annex air outlet (5) disposed on said casing (1), heating means (8) of the air and deflection means able to direct said second air flow (B) entering at the location of said interior air intake (3): - through said at least said exchanger block (4) to said cooled air outlet (3a) according to a first air circuit (Cl), - through the heating means (8) to said heated air outlet (2a) according to a second air circuit (C2), or - Directly to said annex air outlet (5) according to a third air circuit (C3). 2. Ventilation device (10) according to claim 1, characterized in that the deflection means comprise: a first flap (6a) movable between a closed position and an open position of said cooled air outlet (3a), a second flap (6b) movable between a closed position and an open position of said annex air outlet (5), and - A third flap (6c) movable between a closed position and an open position of the passage between said interior air intake (3) and said heated air outlet (2a). 3. Ventilation device (10) according to claim 2, characterized in that it comprises means for moving each of said movable flaps (6a, 6b, 6c) between an open position and a closed position allowing: to open the second movable flap (6b) and to close the first (6a) and third (6c) movable flaps in a mode of operation known as the extraction of air from said ventilation device (10), - to open the third movable flap (6c) and to close the first (6a) and second (6b) movable flaps in a so-called operating mode of recycling and heating of air of said ventilation device (10), - to close the third movable flap (6c) and to open the first (6a) and second (6b) movable flaps in a so-called heat exchange and air extraction operating mode of said ventilation device (10) , - to close the second (6b) and third (6c) movable flaps and to open the first (6a) movable flap in operating modes known as heat exchange with or without air heating of said ventilation device (10 ). 4. Ventilation device (10) according to claim 3, characterized in that it comprises means for activating / deactivating the heating means (8) capable of activating the latter in the operating mode known as heat exchange. with heating of said ventilation device (10) and in the operating mode called recycling and heating of air of said ventilation device (10). 5. Ventilation device (10) according to one of claims 1 to 4, characterized in that it comprises means (7) for circulating air through each of said circuits. 6. Ventilation device (10) according to one of claims 1 to 5, characterized in that it comprises at least one filter (14) disposed at the location of the indoor air intake (3). 7. Ventilation device (10) according to any one of claims 1 to 6, characterized in that the heating means (8) comprise indirect combustion heating means. 8. Ventilation device (10) according to claim 7, characterized in that the heating means (8) with indirect combustion comprise means (13) of gas heating. 9. Building (90, 91) for poultry farming comprising a plurality of ventilation devices (10) for ventilation according to one of claims 1 to 8, said devices being arranged on at least one longitudinal side of said building (90, 91 ), the building further comprising at least one turbine or exhaust fan (20) for the indoor air located on at least one of the gables of said building or on at least one longitudinal side of said building. 10. Building (91) poultry farm according to claim 9, characterized in that said ventilation devices (10) are distributed on the two longitudinal sides of the building, vis-à-vis or staggered. 11. Poultry breeding building according to claim 9, characterized in that said ventilation devices (10) and several turbines or exhaust fans (20) are alternately distributed on a longitudinal side of said building. 12. Poultry breeding building according to claim 8 or 9, further having a regulation system comprising: - at least one memory for storing the air renewal needs of animals according to their age, - at least one sensor for measuring the interior temperature of said building, and a control interface for each ventilation device (10) which selects, according to the measured temperature and the air renewal needs, the operating mode of the device from the operating mode known as air extraction, the operating mode called recirculation and air heating, the operating mode called heat exchange and air extraction, and the operating modes called heat exchange with or without air heating . 13. Method of using at least one ventilation device (10) according to one of claims 1 to 8 within a building (90, 91) for poultry farming according to one of claims 9 to 12 , the method comprising the following steps: - during a first phase of animal breeding, called phase 5 endothermic, ventilation and heating of said building using said at least one ventilation device (10); and - during a second phase of animal rearing, known as the exothermic phase, ventilation of said poultry building using said at least one turbine and said at least one extraction fan (20), and heating of said building using 10 of said at least one ventilation device (10).