FR2731268A1 - Livestock building ventilation system - Google Patents

Abstract

The system consists of a high-output fan (13) with fixing brackets at the top, and an air diffusor (15) with a raised centre (16) beneath it. The fan draws in air from above and blows it out sideways, creating a horizontal air flow at an optimum height, creating a movement of air at the level of the livestock, esp. poultry, by induction alone and with no direct contact between the air flow and the livestock. The system can also be equipped with mist nozzles to humidify the air flow and lower the air temperature experienced by the livestock.

Description

DEVICE FOR IMPROVING THE VENTILATION AIR CIRCUIT
IN LIVESTOCK BUILDINGS.

The present invention relates to a device for improving the circulation of air in livestock buildings, particularly of the poultry type.

These buildings are designed to optimize the growth of animals.

The parameters of the building are managed very precisely, in order to give the best compromise of comfort to the animals which thus express their growth potential as well as possible.

Controlling the renewal of indoor air is very important because this parameter must constantly change based on multiple data, namely: indoor and outdoor air temperature, humidity, number of animals, speed of the air. , etc ...

In all circumstances the air renewal must be high enough to avoid suffocation of the animals, while remaining low enough to avoid cold drafts.

There are three types of livestock buildings, depending on the type of air renewal - dynamic buildings use a system of
ventilation to force the entry or extraction of air.

- natural buildings use the force of the wind as
air renewal element.

- static buildings use the chimney effect
to provide ventilation.

The invention which is the subject of this document relates primarily to static buildings, but it can be used in other types of building.

For the reasons explained below, the air renewal of these buildings becomes insufficient when it is hot outside.

The device according to the invention overcomes this drawback, insofar as it makes it possible to force the movement of air inside when normal operation becomes insufficient.

Optionally, the device can be equipped with a misting system to lower the temperature felt by the animals.

The accompanying drawings illustrate the invention.

Figure 1 shows a cross section of a static building in good operating conditions, that is, when the indoor temperature is sufficiently higher than the outdoor temperature.

Figure 2 shows a cross section of a static building in the case where the indoor and outdoor temperatures are very close, highlighting the problem of poor ventilation.

FIG. 3 represents a cross section of a static building under the unfavorable conditions described for FIG. 2, but equipped with the invention.

Figure 4 shows the detail of the invention.

FIG. 5 represents a horizontal view of the invention, with the air circuits caused.

Figure 6 shows the building in Figure 3, equipped with the misting option.

Referring to Figure 1, static buildings consist of one or more ceiling openings (1), through which the warm indoor air escapes depending on the temperature difference between the interior (2) and the exterior (3), causing an air vacuum inside, compensated by the air intake by the side doors (4).

The ascending air column (5) between the side hatches (4) and the ceiling opening (1), creates an induction (6) with the interior air, causing an air movement (7) at the level animals.

With reference to FIG. 2, the proximity of temperature between the interior (2) and the exterior (3) causes an ascending column of air (5) with a speed too low to cause induction (6) of the Figure 1. The movement of air at the level of the animals (7) is then insufficient or zero, with the risk of illness or suffocation.

Referring to Figure 3, the building is now equipped with the invention (8) coupled to a temperature control (9) to start operation when the interior temperature (2) becomes too high. The device in operation causes an air current (10) which induces (11) the movement of air at the level of the animals (7). The height (12) between the device (8) and the ground (13) must be carefully chosen, site by site, so that the air flow (10) does not reach the animals (7).

Referring to Figure 4, the device consists of a ventilation system (13) of high flow (more than 20,000 m3 / h), below which is fixed, using fixing lugs (14 ), an air diffuser (15) whose center (16) is raised. The device is also equipped with fixing hooks (19) in its upper part, so that it can be suspended with cables.

Referring to Figure 5 the device in use pushes the air (17) from top to bottom to project it to the sides (18) by the diffuser (15).

Referring to Figure 6, the device described in Figure 3 is equipped with the misting option consisting of a circular pipe (20) around the device connected by a connector (22) to the inlet pipe d 'water. On the circular pipe (20) are mounted misting nozzles (21) in variable number. The position of the misting nozzles (21) must be chosen so that they are in the air flow (18) of Figure 5.

Claims (8)

1) Device for improving the movement of air in livestock buildings, characterized in that it comprises a fan (13) of high flow rate, with fixing hooks (19) in its upper part and below which is fixed with the aid of fixing lugs (14) an air diffuser (15) whose center (16) is raised. 2) Device according to claim 1 characterized in that the fan system (13) blows from top to bottom, projecting air against the diffuser (15). 3) Device according to claim 1 or claim 2 characterized in that the diffuser (15) has its raised center (16), to improve the projection of air (18) to the sides. 4) Device according to any one of the preceding claims, characterized in that it is equipped with fixing hooks (19) in its upper part in order to facilitate its installation. 5) Device according to any one of the preceding claims, characterized in that it is intended to cause a horizontal air current (10) at an ideal height (12) in order to cause the movement of air (7) at the level of the animals. exclusively by induction (11), without any direct contact between the animals and the air flow (10). 6) Device according to any one of the preceding claims, characterized in that it can optionally be equipped with a misting ring consisting of a pipe (20) to which misting nozzles (21) are connected. 7) Device according to any one of the preceding claims, characterized in that the position of the optional misting nozzles (21) must be such that they are at the heart of the air flow (18). 8) Device according to any one of the preceding claims, characterized in that the optional misting nozzles (21) project the mist towards the outside of the system, horizontally.