Double-flow controlled mechanical ventilation box comprising a dividing wall which has a curved shape

Abstract

Double-flow controlled mechanical ventilation box (1) comprising at least one air intake vent (2) connected to an intake volume (21) and at least one air discharge vent (3) connected to a discharge volume (31), the intake volume (21) and the discharge volume (31) are separated by a separation wall (5), the box (1) comprising a heat exchanger (4), the intake vent (2) being positioned opposite an inlet face (41) of the air in the heat exchanger (4), characterized in that said separation wall (5) comprises a first part (51) which has a curved shape partly around the intake vent (2) and partly around the discharge vent (3). Figure 3

Description

Title of the invention: Controlled double-flow mechanical ventilation box comprising a separating wall which has a curved shape Technical field

[0001] The invention relates to the field of dual-flow controlled mechanical ventilation installations and more particularly to a dual-flow controlled mechanical ventilation box for a building, and a controlled mechanical ventilation system equipped with this box. State of the prior art

[0002] A dual-flow controlled mechanical ventilation system for a building is intended to allow air renewal in the building while ensuring heat exchange between a flow of supplied air and a flow of extracted air. Subsequently, the air supplied into 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 dual-flow controlled mechanical ventilation system conventionally comprises

[0004] - a network of insufflation ducts intended for insufflation of fresh air into the building and more particularly in rooms for main use;

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

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

[0007] A ventilation box known from the state of the art is of substantially parallelepipedal shape and comprises at least one fresh air intake vent in the ventilation box, one fresh air blowing vent in the building, one stale air intake vent in the ventilation box and one stale air discharge vent from the ventilation box. A fresh air circuit connects, in a sealed manner, the fresh air intake vent to the fresh air blowing vent, and a stale air circuit connects, in a sealed manner, the stale air intake vent and the stale air discharge vent, so that the fresh air and the stale air do not mix. The fresh air circuit and the stale air circuit each pass through the heat exchanger.

[0008] The maximum flow rate of blown air and the maximum flow rate of air extracted from the building are generally close to each other, and are determined in particular as a function of a building size.

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

[0010] Furthermore, 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 construction industry seeks to optimize building space while improving energy performance. The construction industry is therefore looking for ventilation boxes which, for a given maximum flow rate, have both a low volume and high energy efficiency. Statement of the invention

[0013] One embodiment relates to a dual-flow controlled mechanical ventilation box comprising at least one air intake vent connected to an intake volume and at least one air discharge vent connected to a discharge volume, the intake volume and the discharge volume are separated by a separation wall, the box comprising a heat exchanger, the intake vent being positioned opposite an air inlet face into the heat exchanger, characterized in that said separation wall comprises a first part which has a curved shape partly around the intake vent and partly around the discharge vent.

[0014] The dual-flow controlled ventilation box is configured to be connected to a controlled mechanical ventilation system of a building. The ventilation box is therefore configured to be fixed 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 discharge vent.

[0015] The intake or exhaust vent is an opening made in a wall of the ventilation box.

[0016] An air intake vent is understood to mean an vent that is configured to be connected to the fresh air circuit or to the stale air circuit and through which the air is intended to enter the ventilation box, hereinafter called the incoming air flow. In other words, through the intake vent, the air passes from the air circuit into the ventilation box. ventilation.

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

[0018] An air discharge vent is understood to mean a vent which is configured to be connected to the fresh air circuit or to the stale air circuit and through which the air is intended to exit the ventilation box, hereinafter called the discharged air flow. In other words, through the discharge vent, the air passes from the ventilation box into the air circuit.

[0019] The box comprises at least one fresh air discharge outlet, also called fresh air insufflation, and at least one stale air discharge outlet.

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

[0021] The heat exchanger notably comprises 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 a characteristic of the invention, the inlet face is substantially planar.

[0024] According to a characteristic of the invention, the outlet face is substantially planar.

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

[0026] The intake mouth is positioned opposite, i.e. opposite, the inlet face of the heat exchanger so as to direct the incoming air flow onto this inlet face. The intake mouth extends away from the inlet face.

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

[0028] The discharge volume is defined by the volume of air between the outlet face of the heat exchanger and the discharge mouth. Thus, one wall of the discharge volume is the wall on which the discharge mouth extends, another wall of the discharge volume is the outlet face of the heat exchanger.

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

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

[0031] More particularly, the first part is curved on the one hand partly around the intake mouth and on the other hand partly around the discharge mouth. In other words, the first part partly goes around the intake mouth and the discharge mouth.

[0032] Thus, the separating wall is configured to direct the flow of incoming air, respectively discharged, respectively towards the intake vent, respectively the discharge vent. By its specific shape, the separating wall makes it possible to reduce pressure losses of the box and thus increase the flow rates of incoming and discharged air.

[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 subject matter of the present disclosure 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 portion is oriented toward the discharge mouth and a second end of the first portion is oriented toward the intake mouth.

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

[0037] Thus, by the same wall, the intake volume and the discharge volume are optimized. The total volume of the box is therefore optimized.

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

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

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

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

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

[0043] In some embodiments, the partition wall comprises a second portion 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. Thus, a heat exchange within the heat exchanger is homogenized. An energy efficiency of the heat exchanger is therefore optimized. In other words, the second This part allows to maximize the capacity of the heat exchanger to transfer thermal calories from the stale air to the fresh air.

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

[0046] In some embodiments, the second portion of the partition wall is substantially planar.

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

[0048] Thus, the second part of the separating wall allows uniform or almost uniform diffusion of the air entering the heat exchanger while providing sufficient space for the air outlet from the ventilation box.

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

[0050] The inlet wall makes it possible to reduce 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 intake wall is substantially planar.

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

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

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

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

[0056] In some embodiments, at least one wall of the discharge 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 customary to leave a space around the fan of 1.6 times the diameter of the fan in order to optimize its operation. However, with the partition wall according to the invention, a distance of 1.13 times the diameter of the fan is sufficient. This makes it possible to reduce the total volume of the box.

[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, thanks to the description below, which relates to an embodiment according to the present invention, given by way of non-limiting example and explained with reference to the attached schematic drawings, in which:

[0060] [Fig.l] 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 box intake volume according to the invention,

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

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

[0068] The invention relates to a double-flow controlled mechanical ventilation box 1, as illustrated in [Fig.l], configured to be connected to a controlled mechanical ventilation system of a building. The ventilation box 1 is therefore configured to be fixed to a fresh air circuit and a stale air circuit of the building by means of at least one air intake vent 2 and at least one air discharge vent 3.

[0069] The intake 2 or discharge 3 mouth is an opening made in a wall of the ventilation box.

[0070] Air intake vent 2 is understood to mean an vent which is configured to be connected to the fresh air circuit or to the stale air circuit and through which the air is intended to enter the ventilation box 1, hereinafter called the incoming air flow. In other words, through the intake vent 2, the air passes from the air circuit into the ventilation box 1.

[0071] The box 1 comprises at least one fresh air intake vent and at least one stale air intake vent.

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

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

[0074] Air discharge outlet 3 is understood to mean an outlet which is configured to be connected to the fresh air circuit or to the stale air circuit and through which the air is intended to exit the ventilation box 1, hereinafter called the discharge air flow. In other words, through the discharge outlet 3, the air passes from the ventilation box 1 into the air circuit.

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

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

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

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

[0079] The heat exchanger 4 notably comprises 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 comprises an outlet face 42, that is to say a face configured to allow air to exit the heat exchanger 4.

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

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

[0083] The heat exchanger 4 comprises a fresh air inlet face and a face stale air inlet, a fresh air outlet face and a stale air outlet face.

[0084] According to one characteristic, 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 exchanger.

[0087] The intake mouth 2 is positioned opposite, that is to say opposite, the inlet face 41 of the heat exchanger 4 so as to direct the incoming air flow onto this inlet face 41, as illustrated in [Fig.6]. The intake mouth 2 extends at a distance from the inlet face 4L. The intake volume 21 is defined by the volume of air between the intake mouth 2 and the inlet face 41 of the heat exchanger 4. Thus, one wall of the intake volume 21 is the wall on which the intake mouth 2 extends, another wall of the intake 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 provided with 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 intake wall 22 is substantially planar.

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

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

[0092] The intake wall 22 makes it possible to reduce the size of the intake volume 21 by so that the incoming flow is directed more easily 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 mouth 3. Thus, one wall of the discharge volume 31 is the wall on which the discharge mouth 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 reduction 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 planar.

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

[0096] In some 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 which surrounds the fan 6 is at least at a distance D5 from the center of the fan of 8.77”.

[0097] It is customary to leave a space around the fan of 1.6 times the diameter of the fan in order 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 total volume of the box 1.

[0098] The discharge volume 31 and the intake 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 intake volume 21.

[0099] For example, the box comprises 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 outlet and the intake volume connected to the stale air intake outlet, a second separating wall separates the discharge volume connected to the stale air discharge outlet and the intake volume connected to the fresh air intake outlet.

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

[0102] The partition wall 5, illustrated in [Fig.2], comprises a first part 51 which has a curved shape, that is to say that the surface of the partition wall 5 is not plane. The first portion 51 of the partition wall 5 comprises curved lines.

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

[0104] In certain embodiments, a first end 511 of the first portion 51 is oriented towards the outlet mouth 3 and a second end 512 of the first portion 51 is oriented towards the inlet 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 portion 51a has an S shape.

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

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

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

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

[0111] In certain embodiments, the separation wall 5 comprises 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, a heat exchange within the heat exchanger 4 is homogenized. An energy efficiency of the heat exchanger 4 is therefore optimized. In other words, the second part 52 makes it possible to maximize a capacity of the heat exchanger 4 to transfer the thermal calories from the stale air to the fresh air.

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

[0114] In certain embodiments, the second part 52 of the separation wall 5 is substantially planar.

[0115] In certain embodiments, for example illustrated in [Fig.7], the second part 52 of the separation wall 5 forms an angle A1 of at least 10°, preferably at least 14°, for example at least 14.15° with the inlet face 41 of the heat exchanger 4.

[0116] Thus, the second part 52 of the separating wall 5 allows uniform or almost uniform diffusion of the air entering the heat exchanger 4 while providing sufficient space for the air outlet from the ventilation box 1.

[0117] The separating wall 5 according to the invention is configured to direct the flow of incoming air, respectively discharged, respectively towards the intake vent 2, respectively the discharge vent 3. By its specific shape, the separating wall 5 makes it possible to reduce the pressure losses of the box and thus increase the flow rates of incoming and discharged air. Thus, by the same wall, the intake volume and the discharge volume are optimized. The total volume of the box 1 is therefore optimized.

[0118] The invention makes it possible to obtain a ventilation box 1 with a high air flow rate while minimizing a 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 obvious that modifications and changes may 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 illustrated / mentioned embodiments may be combined in additional embodiments. Therefore, the description and drawings should be considered in an illustrative rather than restrictive sense.

[0120] It is also obvious that all the characteristics described with reference to a method 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 method.

Claims

Claims

1. Double-flow controlled mechanical ventilation box (1) comprising at least one air intake vent (2) connected to an intake volume (21) and at least one air discharge vent (3) connected to a discharge volume (31), the intake volume (21) and the discharge volume (31) are separated by a separation wall (5), the box (1) comprising a heat exchanger (4), the intake vent (2) being positioned opposite an inlet face (41) of the air in the heat exchanger (4), characterized in that said separation wall (5) comprises a first part (51) which has a curved shape partly around the intake vent (2) and partly around the discharge vent (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. A ventilation box (1) according to any preceding claim, wherein the first portion (51) has an S shape.

4. Ventilation box (1) according to any one of the preceding claims, wherein the air discharge mouth (3) has a circular shape, the first part (51) bypassing the air discharge mouth (3) at a distance (D2) from the center of the discharge mouth (3) of at least 1.2 times, preferably at least 1.5 times, for example 1.52 times a diameter (D1) of the air discharge mouth (3).

5. A ventilation box (1) according to any preceding claim, wherein the air intake vent (2) has a circular shape, the first portion (51) bypassing the air intake vent (2) at a distance (D3) from the center of the intake vent (2) of at least 1.2 times, preferably 1.5 times, for example 1.52 times a diameter of the air intake vent (2).

6. Ventilation box (1) according to any one of the preceding claims, in which 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 at least 14°, for example 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 intake volume (21) comprises an intake wall (22) provided with a first side in contact with the partition wall (5) and a second side in contact with the inlet face (41) of the heat exchanger (4).

9. A ventilation box (1) according to any preceding claim, wherein the discharge volume (31) comprises a fan (6).

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

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