Double flow ventilation system

The present invention relates to a system ventilation turbofan, for example for the ventilation of a house.

Such a system allows a house to ensure simultaneously blowing air in rooms main (living room, dining room, bedroom ...) and Air extraction in technical rooms (kitchens, health, ...). The extracted air is released outside the house while the blown air is taken outside the House. There is then a dual airflow.

It is known to incorporate elements thermodynamic ventilation systems double flux. Indeed, starting from the observation that especially in winter, the air extracted and discharged to the outside is hot and that the supply air is cold, systems heat exchangers have been developed. The exhaust air used to heat the air blown from the outside. So the air discharged to the outside is cooler and the air blown into less cold.

It is also known to preheat the air breathed, using for example heating elements.

To heat or cool the air significantly a house, the air flows are to instil relatively large. They are much larger than the airflow required for proper air renewal. For example, for a room, if a 25m Speed³/ H ensures the air exchange, a rate of around 150m³/ H necessary to increase or decrease significantly temperature of this room.

WO-97 document / 06390 discloses a device allowing air exchange and packaging. A heat pump team this device and the supply air can be heated or cooled. two fans one hand ensure the air insufflation and secondly the air is released to the outside. The device comprises Further four bedrooms - one exhaust air chamber, a recirculation chamber, a feed chamber air and fresh air room - and a check for regulate air transfer between rooms.

Such a device does not guarantee extraction air. The valve may, in one position, isolate the discharge chamber air and the fresh air chamber air recycling rooms and air supply. The air inside the house is then only recycled.

In other positions of the valve, there is a extraction of air in the house, but it is not all regulated. In all cases, the blowing air is provided to allow to heat or cool the rooms ventilated.

The present invention therefore aims to provide a double flow ventilation system which allows to ensure both ventilation regulated to allow a good exchange of air (essential for the Safe home) but also authorizes significant airflow without disturbing the ventilation regulated. These higher flow rates suitable for the use of a thermodynamic machine such as by example a heat pump, but also when it is desired modulate ventilation in certain parts of the house.

Advantageously, the system according to the invention will be self-regulated to allow perfect control of flows air and could receive a thermodynamic machine for heating or air freshening breathed.

The system according to the invention is a system Double flow ventilation intended to equip a local comprising several parts, having a central, at least one extraction mouth for extracting air of a room and at least one mouth for blowing to blow air in a room, the central having an outer envelope with two inputs and two outputs, one input and one output being connected to outside the space and an inlet and an outlet being connected within the premises, two fans or similar for sucking air through an inlet to send it to an exit, walls delimiting rooms each of which is either a input, an output, and a valve for change the air transfer between rooms.

According to the invention, an additional input opening into the chamber associated with the exit to the outside is provided in the central, this input further being connected to at least one mouth extraction; each fan is provided with means him permitting operation with at least two flow rates distinct, and at least one blowing mouth is provided for the passage of the flow rates of air flow different.

Thus the air drawn by the additional entry can be discharged regardless of the positioning of the valve and the system works. In addition, thanks to the multi-rate fans and vents the associated rates, it is possible to have multiple ventilation systems.

For proper balance between flows air entering and leaving the premises, the system includes advantageously a bypass between the air inlet connected outside or the corresponding chamber and the chamber associated with the outlet of the plant to inside the room. In this case, the gas flowing through each suction mouth connected to the input Extra is preferably regulated and the flow through the bypass is preferably controlled such so that the flow through the bypass is substantially equal to the air flow entering the central through inlet additional.

In a first embodiment, the valve for changing the air transfers between B is a movable wall placed in the heart of Central and delimiting rooms in it. This movable wall is for example mounted pivotably between a first position in which are placed in communication with a hand the chamber associated with the outlet connected to outside the room and the room associated with the entry connected to the interior of the premises, and on the other hand the chamber associated with the inlet connected towards the outside of the local and chamber associated with the outlet connected to the interior of local, and a second position which exposes communication on the one hand the chamber associated with the outlet connected to outside the space and the chamber associated with input connected to the outside of the room, and on the other hand the chamber associated with the inlet connected towards the interior of local and the chamber associated with the outlet connected to inside the room.

In a second embodiment, using work such derivation as described above, valve to change the air transfers rooms ascended to the level input connected to outside the room, the bypass being placed upstream the valve. Compared to the first embodiment, it is advantageous because it allows more easily achieve a good seal at the valve.

To purify the air blown into the room, the filtering means may be provided, upstream of the mouths blowing. These filtration means may find their place in the outlet inwardly local but also at other locations, e.g. upstream of the plant.

The system according to the invention, thanks to its possibility of increasing the flow of air ventilated is particularly suitable in case a system thermodynamics for heating or cooling is integrated in the plant. Advantageously, the system thermodynamics has him driving means permitting operation to at least two powers distinct. To do this, it preferably has two compressors distinct powers. The system thermodynamics used includes for example a condenser and an evaporator, each thereof being associated with a fan or the like.

In a preferred embodiment, every mouth is variable flow insufflation fed by two air channels, each channel being controlled rate and one of the channels having a flap or similar, whose opening and closing are controlled by a user and which allows or denies let air into the mouth insufflation.

For improved ergonomics of the system of control means are advantageously provided to select the desired air flow in each mouth insufflation variable rate.

The invention also relates to a central processing unit for a double flow ventilation system such that described above, comprising an outer casing with two inputs and two outputs, or two fans Similar to extract air through an inlet to send it to an exit, walls delimiting rooms each of which is either a input, an output, and a valve for change air transfers between rooms, characterized in that an additional inlet opening in a chamber associated with an outlet is provided, and that each fan is provided with means him permitting operation with at least two flow rates distinct.

This unit preferably comprises a bypass between an input or the corresponding chamber and chamber associated with the outlet not receiving the input additional. In this case, means are advantageously provided for controlling the air flow to through the bypass.

In a first embodiment, the valve for changing the air transfers between B is a movable wall placed in the heart of Central and delimiting rooms in it. In this case, the movable wall is pivotally mounted e.g. between a first position where are communicated on the one hand the chamber associated with a first output and the chamber associated with a first input, and the other the room associated with a second entrance and bedroom associated with a second output, and a second position where are placed in communication on the one hand the chamber associated the first outlet and the chamber associated with the second input, and on the other hand the chamber associated with the first inlet and the chamber associated with the second output.

In a second embodiment, which is the preferred embodiment, the valve for change the air transfer between rooms is mounted at the entry associated with the bypass, the bypass being placed upstream of the valve.

Filtering means may also be provided at an output.

A thermodynamic system for heating or cooling can be advantageously integrated into this CPU. This system is preferably equipped with motor means allowing it to operate at at least two different powers. he then comprises for instance two compressors powers distinct. It may also have one or two condensers and one or two evaporators, each thereof being associated with a fan or the like.

Anyway, the invention will be well understood using the following description, with reference to the drawing attached schematic, representing for example not limiting a ventilation system and a central unit according to the invention.<sl><li>Figure 1 is a schematic view of a system according to the invention operating in a mode small ventilation speed, or refreshed, or preheated or normal;</li><li>Figure 2 is a view similar to that of the FIG 1 with an operation mode of ventilation great pace, or refreshed, or preheated, or normal;</li><li>Figure 3 is the operating mode great pace ventilation, chilled or preheated recycled;</li><li>Figures 4 to 6 are schematic views of a variant operating in respectively the embodiments of Figures 1 to 3;</li><li>7 schematically shows a sectional control module for a mouth of insufflation variable rate; and</li><li>Figure 8 shows a blowing mouth to variable speed inserted into a ceiling.</li></sl>

Figures 1 to 3 show schematically a housing and a double flow ventilation system designed to ensure air change this dwelling.

This house has a kitchen 2 of local technical 4a, 4b, 4c and 4d, a lobby and 6 life parts 8, 10, 12, 14, 16, 18 and 20.

The ventilation system must ensure in continuously extracting air in the kitchen and 2 local technical 4a-d and nine of air or preheated in parts 8 to 20. In the kitchen extraction can be done with two different rates, while in other technical rooms, the flow extraction is substantially constant. Purely indicative and give a numerical example, we in February 1 kitchen 45m Speed³/ H or 135m³/ H and the Other local technical 30m extraction³/ H of air. As to the air flow blown into the parts 8 to 20, it is of the order of 25m³/ H. As well as all values digital indicated below, these values ​​illustrate the example described and should not be limiting the scope of the present patent application.

The ventilation system comprises a central taking place in a box 22, the inputs and air vents, ducts, vents and extraction and vents.

The box 22 has four compartments, separated by partitions 24:<ul><li>a first compartment 26 receives fresh air taken out of the house. It is connected by a pipe 28 to an air inlet 30 new;</li><li>a second compartment 32 is equipped with a fan 34 for the air supply of parts 8 to 20;</li><li>a third compartment 36 receives air drawn in hall 6 by extraction of mouth 106;</li><li>a fourth compartment 38 is equipped with a fan 40 allowing air evacuation to outside the home. A duct 42 connects this compartment 38 to an air outlet 44.</li></ul>

Each of the fans 34, 40 is provided with a speed controller or similar.

The kitchen 2 is provided with an extraction mouth 102 for sucking air in two speeds distinct. Each technical piece 4a to d is itself provided with a suction mouth 104a-d self-regulated to a single flow. The extract units 102 and 104a-d are connected to a conduit 46 which opens into the fourth compartment 38 of the plant. This compartment 38 therefore comprises an inlet and an air outlet, in addition to existing connections within the box 22 with the other compartments.

Parts 8 to 20 are each equipped a ventilation mouth 108-120 self-regulated flow variable. These mouths are fed by a pipe 48 starting from the second compartment 32 of the housing. A filter is advantageously provided in the conduit 48 so that air blown into pieces 8-20 are free of dust and pollen. It is of course possible dispose the filter at another location, for example in the room 32.

8 shows a mouth 108 fitted to a This mouth piece 8. 108 is mounted in the ceiling 50 Exhibit 8. A grid 52 is placed at ceiling level. It forms the visible part of the system in the room 8.

Above the grid, there is a module control 54 such as that shown in Figure 7. This module 54 may be a rectangular housing which two opposite sides are open to allow a flow air through the housing. A partition 56 shares housing into two channels of different sections. The canal the lower section is constant air flow to ensure the room air renewal correspondingly. This rate is for example 25m³/ H. The other channel provides such a rate 125m³/ H. However, a component 58 can close this channel, as shown in Figure 7. The mouth 108 may therefore with a 25m run rate³/ H or 150m³/ H. The Flow control is provided by a flexible blade 60 placed in the corresponding channel. operation of this blade is known to those skilled in the art. She is attached to an inner wall of the long side of the channel located downstream of the air flow and it is free of side upstream. When air passes through the channel, the slide 60 is especially flexible curves that more pressure is strong. In a curve, it decreases the flow section and maintains a constant flow rate, and vice versa. There is and self-regulation is done automatically.

Each mouth 108-120, the module 54 corresponding regulation is connected via an adapter 62 section to the conduit 48. The adapter 62 allows for the connection between a conduit rectangular cross section and another of circular section.

Inside the housing 22 is placed a valve 64 to put in different ways compartments 26, 32, 36 and 38 in communication. In first position of the valve 64 (Figures 1 and 2), the first 26 and second 32 and third 36 compartments 38 and fourth compartments communicate. In second position of the valve 64 (Figure 3), the first 26 and fourth and second compartments 38 and 32 third 36 compartments communicate. These two positions of the valve 64 are obtained by a pivot partitions 24 to the valve.

A bypass 66 is provided between the conduit 28 bringing air from outside the home to the first compartment 26 and second compartment 32. A regulation module 68 is provided in this bypass 66. The air flow can pass in this branch 66 is substantially equal to the flow passing through the conduit 46. Indeed, the flow in the conduit 46 is substantially constant. A small flow is the sum of outflows by extraction vents 102 to 104a-d. Only the flow mouth 102 of the kitchen can vary. It was therefore in line 46 a relatively constant rate.

The central system is also provided with a thermodynamic system that includes an evaporator 70 and a condenser 72. In the exemplary embodiment, the evaporator 70 is placed just upstream of the fan 34 of the second compartment 32 which feeds the air Parts 8 to 20 while the condenser is located just 72 upstream fan 40 rejecting the extract air Housing outward. A filter is advantageously provided just upstream of the condenser evaporator to protect them from dust located in circulating air. This thermodynamic system allows cool the air blown into the house, since the air entering parts 8 to 20 passes through the evaporator 70. It is of course also possible heat that breathed air. Just then, for example, share instead of the evaporator 70 and condenser 72, or by a reversible thermodynamic system enabling switch roles; thus can be freshen the air or the heat, according to the wish of the user.

The thermodynamic system is driven by a compressor. In the illustrated ventilation system, two compressors are provided. A first compressor 74 is a lower power, eg 1 kw, while the second compressor is a higher power, eg 3kW. These two compressors are housed in the first compartment 26 of the box 22.

In an alternative embodiment, it is possible to have only one compressor but that works two or more different schemes.

According to the invention, the fans 34 and 40 which are located in the box 22 can operate at least two distinct speeds. At each of these speeds corresponds to a different air flow. A gear may by example, correspond to a rate of 150m³/ H while the other corresponds to 550m³/ H.

The operation of the system described above is then as indicated below.

In Figure 1, the system according to the invention works as a mechanical ventilation double flow of the prior art. Air is extracted with a speed given in each technical area 4a-d and the 2 kitchen and is discharged to the outside while the air nine is taken outside and blown into 8 pieces 20.

If the flow rate at the mouth 102 of the Cooking is about 45m³/ H in the technical parts 4a-d 30m³/ H, and if the flow in each blown Exhibit 8 to 20 by the mouths 108-120 is 25m³/ H was then an overall throughput of 165m³/ H out of the house and 175m³/ H entering therein. The difference is very low and we can consider that the system is balanced.

In this configuration, the valve 64 is disposed such that the first 26 and second 32 compartments are in communication, as well as third 36 and fourth 38.

To resume the numerical example given above, a flow of 175m³/ H is sucked through the air inlet 30, through the conduit 28, passes through the first 26 and second compartments 32 and headed for the vents 108-120 through the conduit 48. The fan 34 works with its low speed and thermodynamic system is not running.

The suction side in the house, air sucked into the kitchen and service rooms into the fourth compartment 38 and passes through conduit 42 to exit through the external air outlet 44. The fan 40 works with its low speed.

The exhaust outlet 106 is closed and there no exchange between the third 36 and fourth 38 compartments. A shutter 107 closes the mouth 106.

In Figure 2, the system according to the invention operates in the forced ventilation mode. In this case, the air flow blown into the parts 8, 10, and 12 is not more than 25m³/ H but 150m³/ H. This increased Speed ​​may be desired so many people are in these parts and if some of them, by eg smoke. The low air flow rates in this figure are represented by an arrow while the higher flow rates are greater by arrow. The shutters 58 corresponding to the mouths 108, 110 and 112 are open, while those of the mouths 114-120 are closed.

The air flow blown into the housing is 550m³/ H. The fan 34 then works with its great speed.

The air extraction in local technical 4a d and the kitchen is always at the same rate, or in our numerical example, 165m³/ H.

Much air is breathed an extract. To balance these flows and not create a removal in the house, air is extracted through the mouth Extraction 106 in the open position of the flap 107 located in Hall 6.

The valve 64 in the chamber 22 is in the same position as in Figure 1 and the ventilation mode normal. Here there voluntarily from the air that passes the third 36 to the fourth compartment 38. this rate substantially corresponds to the difference of flow rates blown (550m³/ H) and extracts technical premises (165m³/ H), about 385m³/ H in our example. The fan 40 therefore operates also at high speed, since it cut the air with a flow of 550m³/ H.

In both modes of operation, the system Thermodynamics is at rest, or glow, or Refreshing new.

3 shows a third embodiment operation. Therein the thermodynamic system and operates the user wants such as a Refreshing pieces 8, 10 and 12. To obtain a such refreshment, it is better to have a flow rate high air in these parts to bring more negative calories (1 kilocalorie = -4.185 J) to these parts. Furthermore, rather than instill in these parts from the air exclusively from the outside (by the air inlet 30), there is preferable to blow air that has already been cooled and which is for example drawn into the hall by 6 the mouth 106. In this mode of operation, it is imperative to always have an air extraction in local technical 4a-d and 2 kitchen with the same rates than normal ventilation. In this case, the valve 64 is rotated about 90 ° relative to the position of Figures 1 and 2. The first compartment 26 is then in communication with the fourth 38 and the second 32 with the third 36.

As noted, there is always an air flow extract housing, while the supply air is recycled. To compensate for the exhaust air in the technical premises and cooking and discharged to the outside of the housing, the air must be taken outside and ventilated in Housing. This air passes through the bypass 66, and thus passes not through the first compartment 26.

Using the previous numerical example, input flow through the inlet mouth 30 is about 550m³/ H. approximately 150m³/ H while passing through the bypass 66, the remainder enters the first compartment 26, through the fourth compartment 38 and is rejected by the air outlet 44. This air flow is relatively large and serves to cool the condenser 72 and to evacuate the calories (1 calorie = 4.185 J) open at the condenser 72 when the thermodynamic system works.

approximately 550m³/ H are blown into the room 8, 10 and 12. Approximately 150m³/ H from derivation of the 66, while 400m³/ H remaining derived from a recycling conducted by extracting the air already refreshed by extraction of mouth 106 located in Hall 6 and in making board that air on the evaporator 70 for cool before blowing by the fan 34 in the conduit 48.

The configuration of Figure 3 described as enabling a refresh of the local permits also preheating thereof.

Figures 4 to 6 show a second form embodiment of a system according to the invention. In these figures, the same reference numerals are given to designate similar elements.

In the embodiment of Figures 1 to 3, the valve 64 flow transfer is located within Central in the heart thereof. In the second form embodiment, the inner valve 64 is replaced by a fixed wall 78 and the valve for changing air transfer between rooms of the plant is placed at the entrance to level connected to the outside of the local and thus associated with the chamber 26. We thus find a outer flap 80 at the entrance. this valve outside 80 serves to isolate the chamber 26 air intake Further when the system works ventilation or clean-up (Figures 4 and 5 respectively). It is then in the closed position. When a refresh is desired, the valve outside 80 opens to allow the passage of air on the condenser 72.

The fixed wall 78 separates the chambers of Central as does the valve 64 when the latter is in the position shown in Figure 3. Chambers 26 and 38 are brought into communication and isolated rooms 32 and 36 which are also put their side communication.

System shown in Figure 4 corresponds to the configuration shown in Figure 1 for the first embodiment and corresponds to a operating in normal ventilation. The outer valve 80 is closed. The air flow feeding the parts 8 to 20 passes through the bypass 66 to terminate in the chamber 32 while in the first embodiment, the air through the chamber 26. The numerical example given more above in connection with Figure 1 is valid here.

System shown in Figure 5 corresponds to a variant of the configuration shown in the Figure 2 for the first embodiment and corresponds to forced ventilation operation or pollution. Unlike the configuration of Figure 2, the flap 107 remains closed here because the flow air blown into the housing is substantially equal to airflow extract thereof. The outer valve 80 remains closed.

Here, the air flow blown into the room 8 is 150m³/ H while it is 25m³/ H in the other items 10 to 20. The shutter 58 corresponding to the mouth 108 is open while those mouths are 110 to 120 closed. The blown air flow rate is 270 m³/ H.

The air extraction in local technical 4a d is done with the same speed 30m³/ H by local and it is 135m³/ H in the kitchen 2. The air extraction is done therefore with a flow rate of 255m³/ H.

The small difference between the flow rate incoming and outgoing flows of the dwelling does not justify opening of the flap 107.

If as in the case of Figure 2, the flaps 110 and 112 of Figure 5 is opened, then, as described with reference to Figure 2, the flap 107 is opened to balance the inflow and outflow.

System shown in Figure 6 corresponds to the configuration shown in Figure 3 for the first embodiment and corresponds to a operation in cooling, preheating or recycling. The thermodynamic system operates and the user wishes to refresh or preheating of the pieces 8, 10 and 12. The outer valve 80 is in the open position while the fixed wall 78 occupies the same position as the flap 64 in Figure 3. The passage of air is quite similar to that described with reference to FIG 3.

The system according to the invention allows good balancing an air exchange perspective for Housing in all operating modes. The extraction of air in the technical rooms and the kitchen is always assured and is not affected by the various operating modes. this extraction air is self-regulated permanently.

The thermodynamic system can refresh, or to heat the home. several powers Separate are available to enjoy a cooling (or heating) ok whatever the operating speed of the fans.

This system can easily be fitted with a Central management to select remote areas dwelling to refresh or heating.

The system also allows air extraction Forced (in the example, in the kitchen) on request of a user. This mode of operation is not shown in the figures or described in detail, but it easily from the explanations given above in making the lead extraction in the mouth 106 2 kitchen.

The system of the invention allows control permanent renewal of air, regardless of the configuration of the system operation. Mouths to variable speed to select the pieces we want to refresh, warm or simply ventilate more efficiently. In other areas of the home, Basic insufflation is always assured.

For the first time, a ventilation system controlled is associated with a pre-heating system or Refresh by recycling. The thermodynamic system Associate allows you to refresh or preheating and is suitable in all configurations, thanks to the variable powers delivered by compressors.

The system according to the invention allows for other configurations as those described above with reference to FIGS. We can thus think of a configuration the following characteristics:<ul><li>the valve 107 is open,</li><li>thermodynamic system works in fashion heating,</li><li>the fan for blowing air is great speed,</li><li>the valve 80 is closed, and</li><li>the extraction fan is small speed.</li></ul>

This then allows a mixing of the preheated air.

Another configuration is also possible:<ul><li>the valve 80 is open,</li><li>the exhaust fan is largely speed, and</li><li>the valve 107 remains closed.</li></ul>

This latter configuration allows to increase the performance of the thermodynamic system.

Other combinations still between gears ventilators and openings and closures shutters 107 and 64 of the first embodiment and 107 and 80 of the second embodiment.

It goes without saying that the invention is not limited to the embodiment described above by way of example non-limiting; it embraces on the contrary all variants.

As indicated above, all values Digital data are indicative. flow significantly higher or lower are possible.

The system is described for a home. It is of course adaptable to any other local. Similarly, the number of technical parts or local can be strong different from the example.

The system according to the invention may also exist without thermodynamic system. It would then forced ventilation with recycling in the rooms. A filtering device would then have a effective filtration of the room.

The bypass between the inlet duct and the second compartment is best to have a good balancing air flows in and out. However, in some cases, when the valve allowing change the air transfer between rooms is to within the plant, this derivation may be deleted.

It is also possible in some parts where air is blown, to have a simple flow mouth. he will then not be possible to have a refreshment, preheat or forced ventilation effective in these rooms.