FR3045741A1 - SUCTION PULSER FOR A DEVICE FOR HEATING, VENTILATION AND / OR AIR CONDITIONING OF A MOTOR VEHICLE AND DEVICE FOR HEATING, VENTILATION AND / OR AIR CONDITIONING - Google Patents

Abstract

The invention relates to a suction blower (1) for a heating, ventilation and / or air-conditioning device of a motor vehicle, the blower (1) comprising a turbine (2) capable of being driven in rotation around a axis, separating means (14) able to delimit a first air flow channel allowing the flow of a first air flow (FE, FR) intended to pass through a first axial portion (5) of the turbine (2) and a second air flow channel allowing the flow of a second air flow (FE, FR) for passing through a second axial portion (6) of the turbine (2), said separating means (14) having a tubular member (14) mounted at a first end (8) of said turbine and defining an internal space forming at least a portion of the first air circulation channel, the second circulation channel of air extending outside the tubular member (14), said pulser further comprises an input recirculating air (24), an external air inlet (26) and air guiding means (28, 30, 31, 32, 33) adapted to direct a first air flow (FE, FR) in the first airflow channel, and directing a second airflow (FE, FR) into the second airflow channel, a filter (35) to be traversed by the first and the second air flow (FE, FR). According to the invention, said air guiding means (28, 30, 31, 32, 33) are capable of directing the incoming air flow (FR) through the recirculating air inlet (24) on the the entire surface of the filter (35).

Description

Technical Field of the Invention

The present invention relates to a suction blower for a device for heating, ventilation and / or air conditioning of a motor vehicle and the heating, ventilation and / or air conditioning device comprising such a blower.

State of the prior art

A motor vehicle has a passenger compartment into which the air typically comes from a heating, ventilation and / or air conditioning device.

The heating, ventilation and / or air conditioning system, also known by its English name HVAC (for Heating, Ventilation and Air-Conditioning) can be supplied with either air outside the vehicle (also called fresh air), or with recirculation air, that is to say from the passenger compartment of the vehicle. It is important to be able to dissociate the air flows (outside air - recirculating air), in particular during the passage of said air flows through the heating, ventilation and / or air conditioning device, according to the needs of the occupants of the room. vehicle, or in other words during the thermal conditioning of the air flows. Indeed, the recycling air is already at a temperature close to the target temperature to reach, it is thus possible to quickly reach the temperature desired by the user. However, the recirculation air is more loaded with moisture than the air coming from outside the vehicle, so that if the recirculation air is directed near the windshield via air vents , located in front of the driver or front passenger, for example, or directly on the windshield. Moisture in the recirculated air condenses on the windshield and creates steam. A known solution consists in thermally conditioning the outside air flow and sending it into the passenger compartment near or directly to the windshield, and thermally conditioning the flow of recirculating air and to the In the cockpit, they must be sent away from the windshield at the other air vents, such as the air vents at the driver's or front passenger's feet.

Known heating, ventilation and / or air conditioning devices comprise a cylindrical turbine capable of being rotated about its axis, separation means able to delimit a first air circulation channel allowing the flow of a first flow. air passage for passing through a first axial portion of the turbine and a second air flow channel allowing the flow of a second air flow for passing through a second axial portion of the turbine. The separation means comprise a tubular member mounted at a first end of said turbine and defining an internal space forming a portion of the first air flow channel, the second air circulation channel extending to the outside the tubular organ.

The suction blower further comprises air intake means comprising a housing covering the first end of the turbine and the tubular member, and comprising air guiding means being adapted to direct a first flow of air. air in the first airflow channel, and to direct a second airflow into the second airflow channel.

Such a blower is called "mono-aspiration" because the air enters the blower on one side of the turbine, namely on the side where is located the housing and the tubular separation member.

The aforementioned blower can separate two streams of air, namely the recirculated air flow and the outside air flow. In order to improve the quality of the air sent to the cabin, it is necessary to filter the particles present in the air. A known solution consists in placing a filter upstream of the suction blower with a set of butterfly flaps and fixed partitions for dissociating the two incoming air flows. However, such an installation is not well suited for the needs of air filtration. Indeed, for a 100% recycling mode where only the recirculated air flow is sucked into the two air circulation channels, the combination of the butterfly flaps and fixed partitions reduce the flow section of the air flow and This prevents the flow of air from passing through the entire filter surface, thus degrading the quality of the air.

The present invention aims to improve the quality of the air by ensuring that the flow of recirculating air is able to pass through the entire filter.

For this purpose, the invention proposes a suction blower for a heating, ventilation and / or air-conditioning device for a motor vehicle, the blower comprising a turbine that can be rotated about an axis, suitable separation means delimiting a first air circulation channel allowing the flow of a first air flow intended to pass through a first axial portion of the turbine and a second air circulation channel allowing the flow of a second flow of air for passing through a second axial portion of the turbine, said separating means comprising a tubular member mounted at one end of said turbine and defining an internal space forming at least a part of the first circulation channel of said turbine. air, the second air flow channel extending outside the tubular member, said blower further comprises a recirculating air inlet, an external air inlet and a t air guiding means adapted to direct a first air flow in the first air circulation channel, and to direct a second air flow in the second air circulation channel, and a filter for to be crossed by the first and second air flow. According to the invention, said air guiding means are capable of directing the flow of air entering through the recirculating air inlet over the entire surface of the filter.

Thus, the air guiding means can direct the flow of recirculation air over the entire surface of the filter. As a result, the recirculation air is better filtered improving the quality of the air. In addition, for a mode of operation where only the flow of recirculating air is sucked into the two circulation channels, the air guiding means are such that they can increase the passage section of the air flow. This allows first of all that the entire filter is traversed by the recirculating air flow and, since the passage section of the recirculating air stream is increased there is therefore less of the pressure losses. thus allowing a gain of up to 100 Pa.

Particular embodiments of the invention provide that: - said blower further comprises an additional housing covering the first end of the turbine and the tubular member; - The air guiding means are included in the additional housing; the air guiding means comprise at least a first and a second drum flap; said drum flaps are arranged to completely close in one position the flow of air entering through the outside air inlet; - The air guiding means further comprises a butterfly flap; - The second drum flap is arranged centrally in the additional housing, the butterfly flap and the first drum flap being arranged on either side of said second drum flap; - The additional housing comprises a fixed partition between the butterfly flap and the second drum flap, the butterfly flap being adapted to close the passage of the air flow between the walls of the additional housing and the fixed partition. The invention also relates to a heating, ventilation and / or air conditioning device comprising a suction blower as described above.

BRIEF DESCRIPTION OF THE DRAWINGS Other characteristics and advantages of the invention will emerge on reading the description which follows, with reference to the appended figures, which illustrate: FIG. 1 is a diagrammatic view in axial section of a blower according to the invention and illustrates a first mode of operation; - Figure 2 is a schematic view in axial section of a blower of a blower according to the invention and illustrates another mode of operation; - Figure 3 is a schematic view in axial section of a blower of a blower according to the invention and illustrates another mode of operation.

Detailed Description of the Embodiments

A suction blower 1, illustrated in Figure 1, comprises a turbine 2 of generally cylindrical shape, axis A. The turbine has blades 3 at its radially outer periphery and internally defines a cylindrical space. The turbine 2 comprises a first axial portion 5 extending from a first end 7 of the turbine 2 to an axially median zone, and a second axial portion 6 extending from said median zone to a second end 8, opposed to the first end 7 of the turbine 2. A hub 9 is attached to the turbine 2 serving as a deflector for circulating air flows. The hub 9 is in the form of a part of revolution of axis A, whose generator comprises a radially outer zone rounded, concavely or convexly, and which is turned upwards, that is to say in the direction of the end 8 of the turbine 2, the hub 9 further comprising a central zone 11 in the form of a disc, or dome, perpendicular to the axis A, at which is fixed a rotary drive shaft 12 of an electric motor 13. The radially outer periphery of the hub 9 has a tangent extending in a radial plane and is fixed to the lower end 7 of the turbine 2. In operation, the motor 13 drives in rotation the deflector 9 and the turbine 2.

The terms up and down are defined here with reference to the figures and are not limiting in nature.

A tubular member 14 for separating the air flows is mounted within the blower and extends in part in the internal space of the turbine 2, from the central zone of the turbine 2 to a point beyond from the end 8.

This tubular member 14 has a cylindrical upper part 15 and a lower part 16 flaring downwards. The cylindrical upper part extends between the end 8 and at least one inlet of an air flow, which will be described later, while the lower part 16 extends between the end 8 and the central zone of the turbine 2. The lower portion 16 has a form of revolution of axis A, whose generator is rounded and has its concavity facing upwards. As for the hub 9, the radially outer periphery of the lower part 16 of the tubular member 14 has a tangent extending in a radial plane. However, the outer radial periphery of the hub 9 may be greater than or equal to the radial periphery of the blades 3 of the turbine 2, while the radial periphery of the lower part 16 is smaller than the radial periphery of the blades 3 of the turbine 2, so as not to hinder the rotation of the blades 3.

A housing, commonly called volute 17, surrounds the turbine 2 and the motor 13, said volute 17 has two channels 18, 19 respectively extending opposite the parts 5, 6 of the turbine 2. The housing 17 further comprises a wall annular separation 20 for defining the two channels 18, 19. The tubular member 14 is fixed relative to the volute 17. The volute 17 comprises an upper opening 22 for the passage of at least one air flow within of the blower 1 and the passage of the tubular member 14. Thus, the air flow can flow within the tubular member 14 and in the side passages between the outer surface of the tubular member 14 and the edge of the upper opening 22 of the volute 17.

The blower 1 further comprises an additional air inlet box 21, fixed above the upper opening 22 of the volute 17. The additional box 21 delimits an internal space 23 so as to allow the entry of air. air in the tubular member 14 and / or in the turbine 2 via the upper opening 22. The additional housing 21 comprises two air inlets 24, 26 for the flow of a recirculating air flow FR and d. an outside airflow FE within the blower. As illustrated in FIG. 1, the recirculating air inlet 24 corresponds to an orifice for the recirculating air flow FR whereas the external air inlet 26 corresponds to an orifice for the recirculation flow. outside air FE.

In order to manage the inlet of the different air flows, the additional box 21 further comprises air guiding means 28, 30, 31, 32, 33. The air guiding means comprise here, a first flap drum 28, a second drum flap 30, a butterfly flap, or flag, 31, a fixed partition 32 and a fixed stop 33. The first drum flap 28 is arranged at the outside air inlet 26 and more particularly at immediate proximity of the wall of the additional housing 21. The second drum flap 30 is arranged between the recirculation air inlet 24 and the outside air inlet 26. The butterfly flap 31 and the fixed partition 32 are arranged at the of the recycling air inlet 24 and more particularly in the immediate vicinity of the wall of the additional housing 21. In other words, the second drum flap 30 is arranged centrally within the additional housing 21, with said flap butterfly 31 and the first pane tambo ur 28 being located on either side of said second drum flap 30, located in the center of the additional housing 21.

According to this arrangement, the first drum flap 28 is able to partially close off the outside air inlet 26, and the combination of the first and second drum flaps 28, 30 allows the external air inlet 26 to be completely sealed as illustrated in FIG. FIG. 1. It is also possible to provide a fixed stop 33 arranged between the two drum flaps 28, 30 so that said drum flaps end their stroke against the fixed stop 33. The same applies to the butterfly flap 31 and the fixed partition 32 which partially block the recirculation air inlet 24, and the combination of the butterfly flap 31, the fixed partition 32 and the second drum flap 30 completely closes the recirculation air inlet 24 as shown in Figure 2. The fixed partition 32 is located between the butterfly flap 31 and the second central drum flap 30 so that said two flaps 30, 31 terminate their stroke abutting against the fixed partition 32. The butterfly flap 31 is able to close the passage of the recirculation air flow FR between the additional box 21 and the fixed partition 32.

The first drum flap 28 therefore has a stroke between two extreme positions, a first extreme position called "closed" position, illustrated in FIG. 1, where the drum flap 28 abuts against the wall of the additional casing 21, and a second extreme position. said "open" position, illustrated in Figures 2 and 3, wherein the first drum flap 28 abuts against the wall of the fixed stop 33. In other words, the first drum flap 28 comprises a wall 36 allowing the flow or drying of the external air flow FE, this wall 36 has two ends 38 and 39. When the first drum flap 28 is in the "closed" position as shown in Figure 1, the first end 38 abuts against the wall of the additional housing 21 and the second end 39 abuts against the fixed stop 33. When the first drum flap 28 is in the "open" position, the first end 38 abuts against the fixed stop 33 the second end 39 can possibly abut against the filter 35. However, the fixed stubborn 33 allows alone to maintain the first drum part 28 in each extreme position. For this, the fixed stop 33 has a rounded edge, or curved, adapted to block the rotation of the first drum flap 28 for each end position without preventing the rotation of the drum flap 28 to move from one extreme position to the other .

The second drum flap 30 also has a stroke between two extreme positions, a first extreme position, illustrated in FIGS. 1 and 3, wherein said shutter partially closes the outside air inlet 26, the drum flap 30 abuts against the stop fixed 33, and a second extreme position, illustrated in Figure 2, wherein said shutter partially closes the recirculation air inlet 24, the drum flap 30 abuts against the fixed partition 32.

In order to improve the quality of the air, the additional box 21 further comprises a filter 35. The filter 35 is mounted in the additional box 21 and occupies the entire surface of the air passage opening in view of the its position in the suction blower 1. Such a filter 35 can be easily removed, by opening or removing the additional housing 21 accessible for example from the glove box of the vehicle. The filter 35 is mounted axially between the air inlets 24, 26 and the upper end of the tubular member 14 located in the lower part of the additional housing 21.

FIG. 1 illustrates a first mode of operation, in this mode of operation, called 100% recycling, only the recirculation air is sucked into the blower, so as to supply the heating, ventilation and / or air conditioning device with recirculation air. Such a mode of operation can for example be used in case of air conditioning (for example in summer). Indeed, in such a case, the humidity in the air of the passenger compartment tends to condense during its passage through the evaporator for cooling the air. This recycling air is therefore not or little loaded with moisture and can be sent into the passenger compartment near the windshield.

In this operating mode, the two drum flaps 28, 30 are in the so-called "closed" position for the outside air inlet 26, the latter being closed so that the outside air flow FE can not flow. in the blower 1. Said drum flaps 28, 30 terminate their respective stroke so as to abut against the fixed stop 33 to allow sealing of the outside air inlet 26. The butterfly flaps 31 and drum 30 are in the so-called "open" position for the recirculation air inlet 24, the latter being open so that the recirculation air flow FR can flow within the pulser 1.

The recycling air flow FR, corresponding to the air taken from the passenger compartment, thus enters through the recirculating air inlet 24, passes through the filter 35 and the tubular member 14, the lower part 5 of the turbine 2, and enters the channel 18. At the same time, the recirculation air flow FR enters via the lateral passages located between the external surface of the tubular member 14 and the edge of the upper opening 22 of the volute 17 , the upper part 6 of the turbine 2 and enters the channel 19.

In other words, the recirculating air flow FR is directed by the corresponding surfaces of the deflector 9 and the tubular member 14 opposite the low axial portion 5 of the turbine 2. After passing through the blades 3 of the turbine 2 this air flow enters the channel 18, the latter opening into the passenger compartment of the vehicle away from the windshield. At the same time, the recirculating air flow FR is also sent outside the tubular member 14. This air flow is directed by the corresponding surface of the tubular member 14 opposite the high axial portion 6 of the tubular member 14. the turbine 2. After passing through the blades 3 of the turbine 2, this air flow enters the channel 19, the latter opening into the passenger compartment of the vehicle nearby or directly facing the windshield.

It is therefore possible with such an arrangement, and in particular because of the two drum flaps 28, 30 which allow the passage of the recirculation air flow FR, to direct the recirculation air flow FR over the entire surface. filter 35 thus ensuring better filtration and a reduction in pressure losses.

FIG. 2 illustrates a second mode of operation, in this mode of operation, called 100% fresh, only outside air is sucked into the blower, so as to supply the heating, ventilation and / or air conditioning device with air outside. Such a mode of operation can for example be used in case of heating the outside air (for example in winter or mid-season) while avoiding that too much fog is formed on the windshield.

In this operating mode, the two drum flaps 28, 30 are in the so-called "open" position for the outside air inlet 26, the latter being open so that the outside air flow FE can flow within of the blower 1. The butterfly flaps 31 and drum 30 are in the "closed" position for the recirculation air inlet 24, the latter being closed so that the recirculation air flow FR can not pass through the Pulseur 1. Said drum and butterfly flaps 30, 31 end their respective stroke abutting against the fixed partition 32 to allow sealing of the recirculation air inlet 24.

In this case, the outside air flow FE entering through the filter 35 and the tubular member 14, the lower part 5 of the turbine 2, and enters the channel 18 the latter opening into the passenger compartment of the vehicle, for example away from the windshield. Meanwhile, the external air flow FE also flows, via the outside of the tubular member 14, in the upper part 6 of the turbine 2 and enters the channel 19 the latter opening into the passenger compartment of the vehicle, for example near or directly next to the windshield.

Figure 3 illustrates a third mode of operation, in this mode of operation, called 50/50, outside air and recirculation air are sucked into the blower, so as to supply the heating device, ventilation and / or external air conditioning and recycling, the blower 1 to generate two separate air flows. Such a mode of operation can for example be used in case of air heating (for example in winter or mid-season) and reduces the time required to reach a set temperature, the air temperature taken in the passenger compartment being higher than the temperature of the external air, without too much fog being formed on the windshield.

In this operating mode, the first drum flap 28 is in the so-called "open" position, while the second drum flap 30 is "closed" position, for the outside air inlet 26 so that the external air flow FE can flow within the blower 1. The second drum flap 30 is in the so-called "open" position, while the butterfly flap 31 is in the "closed" position, for the entry of recycling air 24 so that the recirculation air flow FR can also flow into the blower 1. The butterfly flap 31 and the fixed partition 32 directs the recirculating air flow FR to the inside of the blower. the tubular member 14 while the drum flap 28 orients the outside air flow FE towards the outside of the tubular member 14 as illustrated in FIG.

In this case, the recycling air flow FR passes through the filter 35 and the tubular member 14, the lower part 5 of the turbine 2, and enters the channel 18, the latter opening into the passenger compartment of the vehicle at a distance from the windshield. At the same time, the external air flow FE flows via the outside of the tubular member 14 into the upper part 6 of the turbine 2 and enters the channel 19, the latter opening into the passenger compartment of the vehicle in the vicinity or directly facing the windshield.

Claims (9)

claims 1. Pulseur (1) suction for a heater, ventilation and / or air conditioning of a motor vehicle, the blower (1) comprising a turbine (2) adapted to be rotated about an axis, separation means (14) capable of delimiting a first air circulation channel allowing the flow of a first air flow (FE, FR) intended to pass through a first axial part (5) of the turbine (2) and a second air flow channel for the flow of a second air flow (FE, FR) for passing through a second axial portion (6) of the turbine (2), said separating means (14) having a tubular member (14) mounted at a first end (8) of said turbine and defining an internal space forming at least a portion of the first air flow channel, the second air flow channel extending outside the tubular member (14), said blower further comprises an inlet of r recycling (24), an outside air inlet (26), and air guiding means (28, 30, 31, 32, 33) adapted to direct a first air flow (FE, FR) in the first airflow channel, and directing a second airflow (FE, FR) into the second airflow channel, a filter (35) to be traversed by the first and second flows of air (FE, FR), characterized in that said air guiding means (28, 30, 31, 32, 33) are adapted to direct the flow of air (FR) entering through the inlet of recirculation air (24) over the entire filter surface (35). 2. Pulseur (1) suction according to claim 1, characterized in that said blower further comprises an additional housing (21) covering the first end (8) of the turbine (2) and the tubular member (14) . 3. Pulseur (1) suction according to claim 2, characterized in that the air guiding means (28, 30, 31, 32, 33) are included in the additional housing (21). 4. Pulseur (1) suction according to any one of claims 1 to 3, characterized in that the air guiding means (28, 30, 31, 32, 33) comprise at least a first and a second drum flap (28, 30). 5. Pulseur (1) suction according to claim 4, characterized in that said drum flaps (28, 30) are arranged to completely close in one position the air flow (FE) entering through the inlet d outside air (26). 6. Pulseur (1) suction according to one of claims 4 or 5, characterized in that the air guiding means (28, 30, 31, 32, 33) further comprises a butterfly flap (31) . 7. suction blower (1) according to claim 6, characterized in that the second drum flap (30) is arranged centrally in the additional housing (21), the butterfly flap (31) and the first drum flap ( 28) being arranged on either side of said second drum flap (30). 8. Pulseur (1) suction according to any one of claims 6 or 7, characterized in that the additional housing (21) comprises a fixed partition (32) located between the butterfly flap (31) and the second drum flap (30), the butterfly flap (31) being adapted to close the passage of the air flow (FR) between the walls of the additional housing (21) and the fixed partition (32). 9. Heating, ventilation and / or air conditioning device characterized in that it comprises a suction blower (1) according to one of claims 1 to 8.