FR3072158B1 - CONTROLLED MECHANICAL VENTILATION GROUP - Google Patents

Abstract

The invention relates to a controlled mechanical ventilation unit comprising a motor operating a turbine (1) disposed in a suction subassembly (2), downstream of this turbine an opening for rejecting the extracted air (3) and upstream a plurality of suction openings, said plurality of suction openings being disposed in a distribution sub-assembly (5) carrying a plurality of corresponding input channels (6A-6E) allowing the meeting, to inside said distribution subassembly, air flows sucked into the different rooms of a dwelling, ventilation unit equipped with at least two air quality sensors (7, 8). According to the invention, these two sensors (7, 8) are carried by a single printed circuit board (9, 9 ') fixed on the group, so that a said first sensor (7) is in fluid communication with the air flow sucked from a said first input channel (6A) and the other said second sensor (8) is in fluid communication with another air flow.

Description

CONTROLLED MECHANICAL VENTILATION GROUP The invention relates to a controlled mechanical ventilation unit.

A controlled mechanical ventilation unit comprises a ventilation turbine disposed in a volute suction subassembly, downstream of the ventilation turbine an exhaust air aperture extracted and upstream a plurality of ventilation openings. suction of air flow from different parts of the house. This plurality of suction openings is disposed in a distribution subassembly called return plenum, carrying a plurality of inlet channels allowing the meeting of the air flows sucked into the different rooms of the house, in its interior volume.

An example of such a ventilation group is described in patent document FR 2 986 581.

This type of ventilation unit can be equipped with hygrometry and / or temperature sensors. These sensors are generally placed in the air stream that it is desired to analyze, as described for example in patent document EP 2 363 656.

However, when multiple sensors need to be put on separate streams, costly wired connections are required, creating the risk of failure or electromagnetic sensitivity or placing a multitude of separate printed circuits connected together. The invention solves this problem by providing a controlled mechanical ventilation unit equipped with an arrangement of such sensors particularly simple and economical while being of good reliability and a specific detection method.

To do this, the invention proposes a controlled mechanical ventilation unit comprising a motor actuating a turbine disposed in a suction subassembly, downstream of this turbine an opening for rejecting the extracted air and upstream a plurality of suction openings, said plurality of suction openings being disposed in a distribution subassembly carrying a plurality of corresponding inlet channels allowing the meeting, within said distribution subassembly, of the flow streams; air sucked into the different rooms of a house, ventilation unit equipped with at least two air quality sensors, characterized in that these two sensors are carried by a single printed circuit board fixed on the group, so that a said first sensor is in fluid communication with the flow of air sucked from a said first input channel and the other said second sensor is in fluid communication with another airflow.

Thanks to the invention, is eliminated any need to offset the sensors by son. Reliability is increased, the connection is limited and errors or clutter editing removed.

Electromagnetic compatibility problems are also limited.

The printed circuit board being unique, the cost is of course advantageous. Access to maintenance is also facilitated.

According to a preferred embodiment, said two air quality sensors are hygrometry and / or temperature sensors.

Preferably, said printed circuit board is fixed on a wall of the group outside any flow of air flowing in the group and said sensors pass through said wall, so that the first sensor is arranged in flude communication with the flow of air sucked by said first inlet channel and said second sensor is disposed in fluid communication with the other air stream.

Said printed circuit board may be fixed on said wall of the group with the interposition of at least one sealing element.

The group advantageously comprises at least one deflector ensuring the passage of the air flow near a said sensor.

The group may comprise elements of protection against fouling of said sensors, for example a grid.

Preferably, said motor is driven according to the air qualities detected by said sensors.

When one said inlet channel is a maximum suction channel and another channel is a lower suction channel, preferably, said first sensor is in fluid communication with the air flow sucked by said inlet channel. lower suction and said second sensor is in fluid communication with the air flow of said suction subassembly. The invention also relates to a ventilation system comprising such a ventilation unit, characterized in that said lower suction channel is the suction channel of a bathroom.

Preferably, said maximum suction channel is the suction channel of a kitchen. The invention finally relates to a method for detecting hygrometry and / or temperature by means of such a group, characterized in that said first sensor directly detects a representation of a variation in humidity and / or the temperature of the room communicating with said lower suction channel, a representation of a variation of the hygrometry and / or temperature of the room communicating with said maximum suction channel being determined by hygrometry analysis and / or the temperature detected by said second sensor. The invention is described below in more detail with the aid of figures representing only preferred embodiments of the invention.

Figures 1 and 2 are perspective views respectively in top view and in vertical section along a plane A-A of a mechanical ventilation group controlled according to a first embodiment.

Figure 3 is a vertical sectional perspective view of a controlled mechanical ventilation unit according to a second embodiment.

FIG. 4 is a perspective view of a printed circuit board of a controlled mechanical ventilation unit according to this second embodiment.

According to a first embodiment shown in FIGS. 1 and 2, a controlled mechanical ventilation unit comprises a motor operating a turbine, here a motor turbine 1, disposed in a suction subassembly 2, downstream of this turbine. 1 a discharge opening of the extracted air 3 and upstream a plurality of suction openings. The suction subassembly 2 is here in the form of a volute.

This plurality of suction openings is disposed in a distribution subassembly 5 carrying a plurality of corresponding input channels 6A to 6E allowing the meeting, within this distribution sub-assembly 5, of the flow streams. air sucked into the different rooms of a dwelling.

Such a ventilation unit is equipped with at least two air quality sensors.

According to the invention, these two sensors 7 and 8 are carried by a single printed circuit board 9 fixed on the group, so that a first sensor 7 is in fluid communication with the air flow sucked from a first 6A input channel and the other second sensor 8 is in fluid communication with another air flow.

These two air quality sensors are preferably hygrometry and / or temperature sensors.

The printed circuit board 9 is fixed on a wall of the group outside any flow of air circulating in the group and may be polluted by more or less conductive and greasy particles, more precisely on the upper wall (seen according to the figures ) suction and distribution subassemblies 2 and 5.

The sensors 7, 8 pass through this wall, so that the first sensor 7 is arranged in fluid communication with the air flow sucked by the first inlet channel 6A and the second sensor 8 is disposed in fluid communication with the Another flow of air, namely here that of the subassembly of suction 2. By the term "cross", it is not necessarily understood that the sensor passes from one side to the other of the wall, it can be on one side or the other, however, it is well able to detect the characteristics of the flow behind the said wall.

According to the specific embodiment shown, an inlet channel 6B is a maximum suction channel, intended to be connected by a ductwork network to a kitchen, and another channel 6A is a lower suction duct, intended for be connected by a network of ducts to at least one bathroom.

The first sensor 7 is in fluid communication with the air flow sucked by the lower suction channel, namely that intended to be connected to a bathroom, and the second sensor 8 is in fluid communication with the air flow of the suction subassembly 2.

The first sensor 7 directly detects a representation of a variation of the hygrometry and / or the temperature of the room communicating with said lower suction channel 6A, namely corresponding to the bathroom, a representation of a variation of the hygrometry and / or temperature of the room communicating with the maximum suction channel 6B, ie corresponding to the kitchen, being determined by analysis of the hygrometry and / or the temperature detected by the second sensor 8.

The extraction rate of the kitchen being generally preponderant compared to that corresponding to other rooms, an activity in the kitchen is thus detected.

Preferably, the motor of the turbine 1 is controlled according to the air qualities detected by the sensors 7, 8.

It is thus possible to detect taking a shower in the bathroom or an activity in the kitchen and to activate a flow increase by increasing the speed of the turbine 1 or by opening registers on taps (no shown).

Detection is performed by analyzing the variation slopes and / or hygrometry and / or temperature thresholds in the flows in communication with the room to be analyzed.

The printed circuit board 9 can be fixed to the wall of the group with the interposition of at least one sealing element, preferably foam or elastomer. This sealing makes it possible to make reliable the fluid communication between the flow to be detected and the sensor. This in this case avoids polluting the measurement by the atmosphere of the map located outside the streams to be measured.

The group may comprise at least one deflector ensuring the passage of the air flow, from the stitching to be considered, near a corresponding sensor. Such a deflector may be a chimney or a partition. Its function is to ensure that the flow of air to be analyzed passes close to the corresponding sensor and to ensure that the detection zone of the sensor in question is not a dead cavity attenuating or slowing the target signal.

The group may comprise elements for protection against the fouling of said sensors, for example a grid or a filter media.

According to a second embodiment shown in FIGS. 3 and 4, a controlled mechanical ventilation unit comprises a motor operating a turbine, here a motor-turbine 1 'disposed in a suction subassembly 2', downstream of this turbine 1 'an opening for rejecting the extracted air and upstream a plurality of suction openings.

This plurality of suction openings is disposed in a distribution sub-assembly 5 'carrying a plurality of corresponding input channels 6A' to 6'D allowing the meeting, within this distribution subassembly 5 ', air flows sucked into different parts of a home.

Such a ventilation unit is equipped with at least two air quality sensors.

According to the invention, these two sensors 7 'and 8' are carried by a single printed circuit board 9 'fixed to the group, so that a first sensor 7' is in fluid communication with the air flow sucked from a first input channel 6Ά and the other second sensor 8 'is in fluid communication with another air flow.

These two air quality sensors are preferably hygrometry and / or temperature sensors.

The printed circuit board 9 'shown in FIG. 4 is fixed on a wall of the unit outside any air flow, more precisely on the side wall of the suction subassembly 2'.

The second sensor 8 'passes through this wall, so that it is arranged in fluid communication with the air flow of the suction subassembly 2'.

The first sensor 7 'is carried by a tab 9Ά of the printed circuit board 9' and is in fluid communication with the air flow sucked by the channel 6Ά intended here to be connected to a bathroom. To do this, the tongue 9Ά of the printed circuit board 9 'passes through the upper wall of the distribution subassembly 5' by a slot, a sealing member 10 'sealing between the two subassemblies.

As previously, the first sensor 7 'directly detects a representation of a variation of the hygrometry and / or the temperature of the room communicating with said lower suction channel 6Ά, namely corresponding to the bathroom, a representation of a variation of the hygrometry and / or the temperature of the room communicating with the maximum suction channel 6'D, namely corresponding to the kitchen, being determined by analysis of the hygrometry and / or the temperature detected by the second sensor 8 '.

The motor of the turbine 1 'is controlled according to the air qualities detected by the sensors 7', 8 '.

The printed circuit board 9 'can be fixed to the wall of the group with the interposition of other sealing elements.

The group comprises a deflector 11 'having a gate ensuring the passage of air flow near the corresponding sensor 7'. This element 11 'is a creator of aeraulic disturbances and also protects the sensor against particles or during maintenance.

The group may include protection elements against fouling of the sensors.

The two air quality sensors are here preferably hygrometry and / or temperature sensors. However, they can be carbon dioxide or volatile organic compounds. A volatile organic compound sensor could be particularly applicable if said first channel 6A, 6Ά was connected to a toilet.

Claims (11)

1. Controlled mechanical ventilation unit comprising a motor operating a turbine (1, 1 ') disposed in a suction subassembly (2, 2'), downstream of this turbine an opening for rejecting the extracted air ( 3) and upstream a plurality of suction openings, this plurality of suction openings being disposed in a distribution subassembly (5, 5 ') carrying a plurality of corresponding input channels (6A-6E). , 6Ά to 6'D) allowing the meeting, within said distribution subassembly, of the air flows sucked into the different rooms of a dwelling, ventilation unit equipped with at least two sensors of quality d. air (7, 8, 7 ', 7, 8'), characterized in that these two sensors (7, 8, 7 ', 8') are carried by a single printed circuit board (9, 9 ') fixed on the group, so that a said first sensor (7, 7 ') is in fluid communication with the airflow sucked from a said first input channel (6A, 6 Ά) and the other said second sensor (8, 8 ') is in fluid communication with another air flow. 2. A ventilation unit according to claim 1, characterized in that said two air quality sensors (7, 8, 7 ', 8') are hygrometry and / or temperature sensors. 3. Ventilation unit according to claim 1 or 2, characterized in that said printed circuit board (9, 9 ') is fixed on a wall of the group outside any flow of air circulating in the group and said sensors ( 7, 8, 7 ', 8') through said wall, so that the first sensor (7, 7 ') is disposed in fluid communication with the air flow sucked by said first inlet channel (6A, 6Ά ) and said second sensor (8, 8 ') is disposed in fluid communication with the other air stream. 4. Group according to the preceding claim, characterized in that said printed circuit board (9, 9 ') is fixed on said wall of the group with the interposition of at least one sealing element (10'). 5. Group according to one of the preceding claims, characterized in that it comprises at least one deflector (11 ') ensuring the passage of the air flow near a said sensor (7'). 6. Group according to one of the preceding claims, characterized in that it comprises protection elements against fouling of said sensors (7, 8, 7 ', 8'). 7. Group according to one of the preceding claims, characterized in that said motor is controlled according to the air qualities detected by said sensors (7, 8, 7 ', 8'). 8. Ventilation unit according to one of the preceding claims, one of which said inlet channel (6B, 6'B) is a maximum suction channel and another channel (6A, 6Ά) is a lower suction channel , characterized in that said first sensor (7, 7 ') is in fluid communication with the air flow sucked by said lower suction channel (6A, 6Ά) and said second sensor (8, 8') is is in fluid communication with the air flow of said suction subassembly (2, 2 '). 9. Ventilation installation comprising a ventilation unit according to the preceding claim, characterized in that said lower suction channel (6A, 6Ά) is the suction channel of a bathroom 10. Ventilation installation comprising a group according to claim 8 or installation according to claim 9, characterized in that said maximum suction channel (6B, 6'B) is the suction channel of a kitchen. 11. A method for detecting hygrometry and / or temperature, by means of a group according to claim 2 and one of claims 1 to 8, characterized in that said first sensor (7, 7 ') detects directly a representation of a variation of the hygrometry and / or temperature of the room communicating with said lower suction channel (6A, 6Ά), a representation of a variation of the hygrometry and / or the temperature of the local communicating with said maximum suction channel (6B, 6'B) being determined by analysis of hygrometry and / or temperature detected by said second sensor (8, 8 ').