A dual-flow controlled mechanical ventilation unit comprising a partition wall with a curved shape

Abstract

A controlled mechanical ventilation unit (1) with dual flow comprising at least one air inlet (2) connected to an inlet volume (21) and at least one air outlet (3) connected to an outlet volume (31), the inlet volume (21) and the outlet volume (31) being separated by a partition wall (5), the unit (1) comprising a heat exchanger (4), the inlet (2) being positioned opposite an air inlet face (41) into the heat exchanger (4), characterized in that said partition wall (5) comprises a first portion (51) which is curved partly around the inlet (2) and partly around the outlet (3). Figure 3

Description

Title of the invention: Controlled mechanical ventilation unit with double flow comprising a partition wall with a curved shape. Technical field

[0001] The invention relates to the field of controlled double flow mechanical ventilation installations and more particularly to a controlled double flow mechanical ventilation unit for a building, and a controlled mechanical ventilation system equipped with this unit. Prior art

[0002] A controlled, dual-flow mechanical ventilation system for a building is designed to renew the air in the building while ensuring heat exchange between a supply airflow and an exhaust airflow. Hereafter, the air supplied to the building may also be referred to as fresh air, and the air extracted from the building may be referred to as stale air.

[0003] The controlled mechanical ventilation system with dual flow typically comprises:

[0004] - a network of supply ducts intended for supplying fresh air into the building and more specifically in rooms used primarily for;

[0005] - a network of extraction ducts intended for extracting stale air from the building and more specifically technical rooms or damp rooms; and

[0006] - a ventilation unit comprising on the one hand a heat exchanger allowing to the extracted air to transfer thermal calories to the supplied air, and on the other hand at least two fans to circulate the extracted air and the supplied air in the ductwork.

[0007] A ventilation unit known in the prior art is substantially parallelepiped in shape and comprises at least one fresh air inlet in the ventilation unit, one fresh air supply outlet in the building, one stale air inlet in the ventilation unit, and one stale air discharge outlet in the ventilation unit. A fresh air circuit connects, in a sealed manner, the fresh air inlet to the fresh air supply outlet, and a stale air circuit connects, in a sealed manner, the stale air inlet to the stale air discharge outlet, so that the fresh air and stale air do not mix. Both the fresh air circuit and the stale air circuit pass through the heat exchanger.

[0008] The maximum supply air flow rate and the maximum exhaust air flow rate of the building are generally close to each other, and are determined in particular according to the size of the building.

[0009] The maximum flow rate that can be generated by the ventilation unit is generally directly proportional to its total volume. Indeed, the larger the volume of the unit, the lower the pressure losses within the unit, and therefore the greater the flow rate that can be generated, and vice versa. A large volume of the unit allows sufficient space for the fans to operate at their full potential.

[0010] Moreover, for a given maximum flow rate, an improvement in the energy efficiency of the box leads to an increase in pressure losses and therefore an increase in volume.

[0011] By "energy efficiency" is meant the quantity of thermal calories exchanged between the stale air and the fresh air in relation to the flow rate of stale air and fresh air circulating in the box.

[0012] The building sector seeks to optimize building space while improving energy performance. Therefore, the building sector seeks ventilation units that, for a given maximum flow rate, offer both a small volume and high energy efficiency. Description of the invention

[0013] One embodiment relates to a controlled mechanical ventilation unit with double flow comprising at least one air inlet connected to an inlet volume and at least one air outlet connected to an outlet volume, the inlet volume and the outlet volume are separated by a partition wall, the unit comprising a heat exchanger, the inlet being positioned opposite an air inlet face in the heat exchanger, characterized in that said partition wall comprises a first part which has a curved shape partly around the inlet and partly around the outlet.

[0014] The dual-flow controlled ventilation unit is configured to be connected to a controlled mechanical ventilation system of a building. The ventilation unit is therefore configured to be attached to a fresh air circuit and a stale air circuit of the building by means of at least one air intake vent and at least one air exhaust vent.

[0015] The inlet or outlet is an opening made in a wall of the ventilation box.

[0016] An air intake vent is defined as a vent that is configured to be connected to the fresh air circuit or the exhaust air circuit and through which air is intended to enter the ventilation unit, hereinafter referred to as the incoming airflow. In other words, through the intake vent, air passes from the air circuit into the ventilation unit.

[0017] The box includes at least one fresh air intake and at least one stale air intake.

[0018] An air discharge vent is defined as an vent configured to be connected to the fresh air supply or exhaust air supply and through which air is intended to exit the ventilation unit, hereinafter referred to as the exhaust air flow rate. In other words, through the discharge vent, air passes from the ventilation unit into the air supply.

[0019] The box includes at least one fresh air outlet, also called fresh air supply, and at least one stale air outlet.

[0020] The casing also includes a heat exchanger configured to allow the stale air to transfer its thermal calories to the fresh air.

[0021] The heat exchanger includes in particular an inlet face, that is to say a face configured to allow air to enter the heat exchanger.

[0022] The heat exchanger also includes an outlet face, i.e. a face configured to allow air to exit the heat exchanger.

[0023] According to one feature of the invention, the inlet face is substantially flat.

[0024] According to one feature of the invention, the outlet face is substantially flat.

[0025] The heat exchanger includes a fresh air inlet face and a stale air inlet face, a fresh air outlet face and a stale air outlet face.

[0026] The inlet opening is positioned opposite, that is, facing, the inlet face of the heat exchanger so as to direct the incoming airflow onto this inlet face. The inlet opening extends a distance from the inlet face.

[0027] The intake volume is defined as the volume of air between the intake opening and the inlet face of the heat exchanger. Thus, one wall of the intake volume is the wall over which the intake opening extends, and another wall of the intake volume is the inlet face of the heat exchanger.

[0028] The rejection volume is defined as the volume of air between the outlet face of the heat exchanger and the rejection outlet. Thus, one wall of the rejection volume is the wall over which the rejection outlet extends, and another wall of the rejection volume is the outlet face of the heat exchanger.

[0029] The discharge and intake volumes are separated by the separating wall. In other words, the separating wall is a wall of both the discharge and intake volumes. More specifically, one face of the separating wall is in contact with the intake volume, and a face opposite the face of the separating wall in contact with the intake volume is in contact with the discharge volume.

[0030] The separating wall comprises a first part which has a curved shape, i.e., the surface of the separating wall is not flat. The first part of the separating wall comprises curved lines.

[0031] More specifically, the first part is curved partly around the inlet and partly around the outlet. In other words, the first part partially bypasses the inlet and outlet.

[0032] Thus, the partition wall is configured to direct the incoming and outgoing airflows, respectively, towards the inlet and outlet. Its specific shape allows the partition wall to reduce pressure losses in the chamber and thereby increase the incoming and outgoing airflows.

[0033] The invention makes it possible to obtain a ventilation box with a high air flow rate while minimizing the total volume of the box compared to the state of the art.

[0034] The object of this presentation may also have one or more of the following characteristics taken alone or in combination.

[0035] In some embodiments, a first end of the first part is oriented towards the discharge mouth and a second end of the first part is oriented towards the intake mouth.

[0036] In other words, the first end of the first part is closer to the discharge mouth than to the intake mouth, while the second end of the first part is closer to the intake mouth than to the discharge mouth.

[0037] Thus, through the same wall, the intake volume and the exhaust volume are optimized. The total volume of the chamber is therefore optimized.

[0038] In some embodiments, the first part has an S shape.

[0039] The first part undulates, that is to say forms a sinuous line, between the inlet and outlet.

[0040] In some embodiments, the air discharge outlet has a circular shape, the first part surrounding the air discharge outlet at a distance from the center of the discharge outlet of at least 1.2 times, preferably at least 1.5 times, for example 1.52 times a diameter of the air discharge outlet.

[0041] In some embodiments, the air inlet has a circular shape, the first part surrounding the air inlet at a distance from the center of the inlet of at least 1.2 times, preferably 1.5 times, for example 1.52 times a diameter of the air inlet.

[0042] Thus, the separation wall allows the best compromise between pressure losses during the rejection of air and the intake of air into the heat exchanger.

[0043] In some embodiments, the separating wall includes a second part extending opposite the inlet face of the heat exchanger.

[0044] The second part of the partition wall is configured to force the incoming air to diffuse over the entire inlet face of the heat exchanger. This homogenizes heat exchange within the heat exchanger, thus optimizing its energy efficiency. In other words, the second part maximizes the heat exchanger's capacity to transfer heat from the stale air to the fresh air.

[0045] In some embodiments, an edge of the second part of the separating wall is in contact with the inlet face of the heat exchanger.

[0046] In some embodiments, the second part of the separating wall is substantially flat.

[0047] In some embodiments, the second part of the separating wall forms an angle of at least 10°, preferably of at least 14°, for example of at least 14.15° with the inlet face of the heat exchanger.

[0048] Thus, the second part of the partition wall allows a uniform or almost uniform diffusion of the air entering the heat exchanger while freeing up enough space for the air outlet of the ventilation box.

[0049] In some embodiments, the intake volume includes an intake wall having a first side in contact with a separating wall and a second side in contact with the inlet face of the heat exchanger.

[0050] The inlet wall allows a reduction in the size of the inlet volume so that the incoming flow is more easily directed towards the inlet face of the heat exchanger.

[0051] In some embodiments, the inlet wall is substantially flat.

[0052] In some embodiments, the inlet wall comprises a third side in contact with the wall on which the intake opening extends.

[0053] In some embodiments, the intake volume is delimited by walls forming an outer wall of the ventilation box.

[0054] In some embodiments, the discharge volume includes a fan.

[0055] The fan is therefore positioned in the discharge volume.

[0056] In certain embodiments, at least one wall of the rejection volume surrounds the fan at a distance from the center of the fan of between 1 and 1.5 times, preferably between 1.1 and 1.2 times, for example 1.13 times a diameter of the fan.

[0057] It is common practice to leave a space around the fan of 1.6 times the fan diameter to optimize its operation. However, with the partition wall according to the invention, a distance of 1.13 times the fan diameter is sufficient. This makes it possible to reduce the overall volume of the enclosure.

[0058] Another aspect of the invention relates to a controlled mechanical ventilation system comprising a ventilation box according to the invention. Brief description of the drawings

[0059] The invention will be better understood from the following description, which relates to an embodiment according to the present invention, given by way of non-limiting example and explained with reference to the accompanying schematic drawings, in which:

[0060] [Fig-1] is a three-dimensional representation of a ventilation box according to the invention,

[0061] [Fig.2] is a three-dimensional representation of an internal part of the box of ventilation according to the invention,

[0062] [Fig.3] is a view of the ventilation box according to the invention,

[0063] [Fig.4] is a diagram of [Fig.3],

[0064] [Fig.5] is a view of a discharge volume of the ventilation box according to the invention,

[0065] [Fig.6] is a view of a ventilation chamber intake volume according to the invention,

[0066] [Fig.7] is a diagram of [Fig.6], Description of the implementation methods

[0067] Only the elements necessary for understanding the invention have been shown. To facilitate reading the drawings, the same elements bear the same reference numerals from one figure to another.

[0068] The invention relates to a controlled mechanical ventilation unit 1 with dual flow, as illustrated in [Fig. 1], configured to be connected to a controlled mechanical ventilation system of a building. The ventilation unit 1 is therefore configured to be attached to a fresh air circuit and a stale air circuit of the building by means of at least one air inlet vent 2 and at least one air outlet vent 3.

[0069] The inlet 2 or outlet 3 is an opening made in a wall of the ventilation box.

[0070] An air inlet vent 2 is defined as a vent configured to be connected to the fresh air supply or exhaust air supply and through which air is intended to enter the ventilation unit 1, hereinafter referred to as the incoming airflow. In other words, through the inlet vent 2, air passes from the supply air supply into the ventilation unit 1.

[0071] The casing 1 includes at least one fresh air intake and at least one stale air intake.

[0072] Preferably, the inlet mouth 2 has a circular shape.

[0073] The air intake 2 connected to an intake volume 21.

[0074] An air discharge vent 3 is understood to be a vent that is configured to be connected to the fresh air circuit or the stale air circuit and through which the air is intended to exit the ventilation unit 1, hereinafter referred to as the exhaust air flow rate. In other words, through the exhaust vent 3, the air passes from the ventilation unit 1 into the air circuit.

[0075] The box 1 includes at least one fresh air discharge outlet and at least one stale air discharge outlet.

[0076] Preferably, the rejection mouth 3 has a circular shape.

[0077] The air discharge outlet 3 connected to a discharge volume 31.

[0078] The casing 1 also includes a heat exchanger 4 configured to allow the stale air to transfer its thermal calories to the fresh air.

[0079] The heat exchanger 4 includes in particular an inlet face 41, that is to say a face configured to allow air to enter the heat exchanger.

[0080] The heat exchanger 4 also includes an outlet face 42, that is to say a face configured to allow air to exit the heat exchanger 4.

[0081] According to a feature of the invention, the inlet face 41 is substantially flat.

[0082] According to a feature of the invention, the exit face 42 is substantially flat.

[0083] The heat exchanger 4 comprises a fresh air inlet face and a face one side for the intake of stale air, one side for the outlet of fresh air and one side for the outlet of stale air.

[0084] According to one feature, the heat exchanger 4 has the shape of a hexagonal prism.

[0085] In [Fig. 1], the heat exchanger 4 is not shown.

[0086] Preferably, the heat exchanger 4 is a counter-current plate heat exchanger.

[0087] The inlet 2 is positioned opposite, that is, facing, the inlet face 41 of the heat exchanger 4 so as to direct the incoming airflow onto this inlet face 41, as illustrated in [Fig. 6]. The inlet 2 extends at a distance from the inlet face 4L. The inlet volume 21 is defined as the volume of air between the inlet 2 and the inlet face 41 of the heat exchanger 4. Thus, one wall of the inlet volume 21 is the wall over which the inlet 2 extends, and another wall of the inlet volume 21 is the inlet face 41 of the heat exchanger 4.

[0088] The intake volume 21 is also delimited by a separation wall 5, an intake wall 22 having a first side in contact with the separation wall 5 and a second side in contact with the inlet face 41 of the heat exchanger 4. The first side and the second side of the intake wall 22 are substantially perpendicular to each other.

[0089] In some embodiments, the inlet wall 22 is substantially flat.

[0090] In certain embodiments, the inlet wall 22 comprises a third The side in contact with the wall on which the intake opening extends. The third side extends substantially parallel to the second side, and substantially perpendicular to the first side.

[0091] In some embodiments, the intake volume 21 is delimited by walls forming an outer wall of the ventilation box 1.

[0092] The inlet wall 22 allows a reduction in the size of the inlet volume 21 so that the incoming flow is more easily directed towards the inlet face 41 of the heat exchanger 4.

[0093] The discharge volume 31 is defined by the volume of air between the outlet face 42 of the heat exchanger 4 and the discharge outlet 3. Thus, one wall of the discharge volume 31 is the wall over which the discharge outlet 3 extends, another wall of the discharge volume 31 is the outlet face 42 of the heat exchanger 4. The discharge volume 31 is also delimited by the separation wall 5, a reducing wall 32, and walls forming an outer wall of the ventilation box 1.

[0094] The reduction wall 32 limits a size of the discharge volume 31. The reduction wall 32 extends between an outer wall of the ventilation box, the separation wall 5, and the outlet face 42 of the heat exchanger 4. The reduction wall 32 is substantially flat.

[0095] In some embodiments, the discharge volume 31 includes a fan 6, for example illustrated in [Fig.5].

[0096] In certain embodiments, at least one wall of the discharge volume 31 surrounds the fan 6 at a distance D5 from the center of the fan 6 of between 1 and 1.5 times, preferably between 1.1 and 1.2 times, for example 1.13 times a diameter D4 of the fan 6. In other words, for example with a diameter of the fan 6 of 7.70”, a wall of the discharge volume 31 that surrounds the fan 6 is at least at a distance D5 from the center of the fan of 8.77”.

[0097] It is common practice to leave a space around the fan of 1.6 times the fan diameter to optimize its operation. However, with the partition wall 5 according to the invention, a distance of 1.13 times the diameter of the fan 6 is sufficient. This makes it possible to reduce the overall volume of the enclosure 1.

[0098] The discharge volume 31 and the inlet volume 21 are separated by the separation wall 5. In other words, the separation wall 5 is a wall of the discharge volume 31 and the inlet volume 21.

[0099] For example, the box includes at least two separating walls, each separating a discharge volume 31 from an intake volume 21.

[0100] For example, a first separating wall separates the discharge volume 31 connected to the fresh air discharge vent and the intake volume connected to the stale air intake vent, a second separating wall separates the discharge volume connected to the stale air discharge vent and the intake volume connected to the fresh air intake vent.

[0101] More particularly, a face 5a of the separation wall 5 is in contact with the inlet volume 21, and a face 5b, opposite to the face 5a of the separation wall 5 in contact with the inlet volume 21, is in contact with the discharge volume 31.

[0102] The partition wall 5, illustrated in [Fig. 2], includes a first portion 51 which has a curved shape, i.e., the surface of the partition wall 5 is not flat. The first portion 51 of the partition wall 5 comprises curved lines.

[0103] More particularly, the first part 51 has a curved shape partly around the inlet mouth 2 and partly around the outlet mouth 3. In other words, the first part 51 partially bypasses the inlet mouth 2 and the outlet mouth 3.

[0104] In some embodiments, a first end 511 of the first part 51 is oriented towards the discharge mouth 3 and a second end 512 of the first part 51 is oriented towards the intake mouth 2.

[0105] In other words, the first end 511 of the first part 51 is closer to the discharge mouth 3 than to the intake mouth 2, while the second end 512 of the first part 51 is closer to the intake mouth 2 than to the discharge mouth 3 as illustrated in figures 3 and 4.

[0106] In some embodiments, the first part 51 has an S-shape.

[0107] The first part 51 undulates, that is to say forms a sinuous line, between the inlet mouth 2 and the outlet mouth 3.

[0108] In certain embodiments, for example illustrated in [Fig. 4], the first part 51 bypasses the air discharge outlet 3 at a distance D2 from the center of the discharge outlet 3 of at least 1.2 times, preferably at least 1.5 times, for example 1.52 times a diameter of the air discharge outlet 3. In other words, for example with a diameter DI of the discharge outlet of 4.9”, the first part 51 is at least at a distance D2 from the center of the discharge outlet 3 of 7.46”.

[0109] In certain embodiments, for example illustrated in [Fig. 4], the first part 51 bypasses the air inlet 2 at a distance from the center of the inlet 2 of at least 1.2 times, preferably 1.5 times, for example 1.52 times a diameter of the air inlet 2. In other words, for example with a diameter of the inlet 2 of 4.9”, the first part 51 is at least at a distance D3 from the center of the inlet 2 of 7.59”.

[0110] Thus, the separation wall 5 allows the best compromise between pressure losses during the rejection of air and the intake of air into the heat exchanger 4.

[0111] In some embodiments, the separating wall 5 includes a second part 52 extending opposite the inlet face 41 of the heat exchanger 4.

[0112] The second part 52 of the partition wall 5 is configured to force the incoming air to diffuse over the entire inlet face 41 of the heat exchanger 4, as illustrated in [Fig. 6]. Thus, heat exchange within the exchanger Thermal conductivity 4 is homogenized. The energy efficiency of heat exchanger 4 is therefore optimized. In other words, the second part 52 maximizes the capacity of heat exchanger 4 to transfer thermal energy from the stale air to the fresh air.

[0113] In some embodiments, an edge of the second part 52 of the separating wall 5 is in contact with the inlet face 41 of the heat exchanger 4.

[0114] In some embodiments, the second part 52 of the separating wall 5 is substantially flat.

[0115] In certain embodiments, for example illustrated in [Fig.7], the second part 52 of the separating wall 5 forms an angle Al of at least 10°, preferably of at least 14°, for example of at least 14.15° with the inlet face 41 of the heat exchanger 4.

[0116] Thus, the second part 52 of the partition wall 5 allows a uniform or almost uniform diffusion of the air entering the heat exchanger 4 while freeing up enough space for the air outlet of the ventilation box 1.

[0117] The partition wall 5 according to the invention is configured to direct the incoming and outgoing airflows, respectively, towards the inlet vent 2 and the outlet vent 3. By its specific shape, the partition wall 5 reduces pressure losses in the enclosure and thus increases the incoming and outgoing airflows. Therefore, the intake and exhaust volumes are optimized through a single wall. The total volume of the enclosure 1 is thus optimized.

[0118] The invention makes it possible to obtain a ventilation box 1 with a high air flow rate while minimizing the total volume of the box 1 compared to the state of the art.

[0119] Although the present invention has been described with reference to specific embodiments, it is evident that modifications and changes can be made to these examples without departing from the general scope of the invention as defined by the claims. In particular, individual features of the various embodiments illustrated / mentioned can be combined in additional embodiments. Therefore, the description and drawings should be considered in an illustrative rather than a restrictive sense.

[0120] It is also evident that all the characteristics described with reference to a process are transposable, alone or in combination, to a device, and conversely, all the characteristics described with reference to a device are transposable, alone or in combination, to a process.

Claims

Demands

1. A controlled mechanical double-flow ventilation unit (1) comprising at least one air inlet (2) connected to an inlet volume (21) and at least one air outlet (3) connected to an outlet volume (31), the inlet volume (21) and the outlet volume (31) being separated by a partition wall (5), the unit (1) comprising a heat exchanger (4), the inlet (2) being positioned opposite an air inlet face (41) in the heat exchanger (4), characterized in that said partition wall (5) comprises a first part (51) which includes curved lines arranged partly around the inlet (2) and partly around the outlet (3).

2. Ventilation box (1) according to claim 1, wherein a first end (511) of the first part (51) is oriented towards the discharge mouth (3) and a second end (512) of the first part (51) is oriented towards the intake mouth (2).

3. Ventilation box (1) according to any one of the preceding claims, wherein the first part (51) has an S shape.

4. Ventilation box (1) according to any one of the preceding claims, wherein the air discharge outlet (3) has a circular shape, the first part (51) circumventing the air discharge outlet (3) at a distance (D2) from the center of the discharge outlet (3) of at least 1.2 times, preferably at least 1.5 times, for example 1.52 times a diameter (Dl) of the air discharge outlet (3).

5. Ventilation box (1) according to any one of the preceding claims, wherein the air inlet (2) has a circular shape, the first part (51) bypassing the air inlet (2) at a distance (D3) from the center of the inlet (2) of at least 1.2 times, preferably 1.5 times, for example 1.52 times a diameter of the air inlet (2).

6. Ventilation box (1) according to any one of the preceding claims, wherein the separating wall (5) comprises a second part (52) extending opposite the inlet face (41) of the heat exchanger (4).

7. Ventilation box (1) according to claim 6, wherein the second part (52) of the partition wall (5) forms an angle of at least 10°, preferably of at least 14°, for example of at least 14.15° with the inlet face (41) of the heat exchanger (4).

8. Ventilation box (1) according to any one of the preceding claims, wherein the inlet volume (21) comprises an inlet wall (22) having a first side in contact with a separating wall (5) and a second side in contact with the inlet face (41) of the heat exchanger (4).

9. Ventilation box (1) according to any one of the preceding claims, wherein the discharge volume (31) includes a fan (6).

10. Controlled mechanical ventilation system comprising a ventilation unit (1) according to any one of the preceding claims.

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