FR3075264A1 - Ventilation device for motor vehicle - Google Patents

Ventilation device for motor vehicle Download PDF

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Publication number
FR3075264A1
FR3075264A1 FR1762621A FR1762621A FR3075264A1 FR 3075264 A1 FR3075264 A1 FR 3075264A1 FR 1762621 A FR1762621 A FR 1762621A FR 1762621 A FR1762621 A FR 1762621A FR 3075264 A1 FR3075264 A1 FR 3075264A1
Authority
FR
France
Prior art keywords
ventilation device
device according
tubes
preceding
heat exchanger
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
FR1762621A
Other languages
French (fr)
Inventor
Michael Lissner
Amrid Mammeri
Kamel Azzouz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Valeo Systemes Thermiques SAS
Original Assignee
Valeo Systemes Thermiques SAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Valeo Systemes Thermiques SAS filed Critical Valeo Systemes Thermiques SAS
Priority to FR1762621A priority Critical patent/FR3075264A1/en
Publication of FR3075264A1 publication Critical patent/FR3075264A1/en
Application status is Pending legal-status Critical

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01PCOOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P5/00Pumping cooling-air or liquid coolants
    • F01P5/02Pumping cooling-air; Arrangements of cooling-air pumps, e.g. fans or blowers
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01PCOOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P11/00Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
    • F01P11/10Guiding or ducting cooling-air, to, or from, liquid-to-air heat exchangers
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04FPUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
    • F04F5/00Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
    • F04F5/14Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid
    • F04F5/16Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid displacing elastic fluids
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04FPUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
    • F04F5/00Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
    • F04F5/44Component parts, details, or accessories not provided for in, or of interest apart from, groups F04F5/02 - F04F5/42
    • F04F5/46Arrangements of nozzles
    • F04F5/461Adjustable nozzles
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04FPUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
    • F04F5/00Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
    • F04F5/44Component parts, details, or accessories not provided for in, or of interest apart from, groups F04F5/02 - F04F5/42
    • F04F5/48Control
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60KARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K11/00Arrangement in connection with cooling of propulsion units
    • B60K11/08Air inlets for cooling; Shutters or blinds therefor
    • B60K11/085Air inlets for cooling; Shutters or blinds therefor with adjustable shutters or blinds
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01PCOOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P2070/00Details
    • F01P2070/02Details using shape memory alloys
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01PCOOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P2070/00Details
    • F01P2070/04Details using electrical heating elements
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01PCOOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P7/00Controlling of coolant flow
    • F01P7/02Controlling of coolant flow the coolant being cooling-air
    • F01P7/10Controlling of coolant flow the coolant being cooling-air by throttling amount of air flowing through liquid-to-air heat exchangers

Description

The invention relates to a ventilation device for a motor vehicle. The invention relates to the field of the automobile, and more particularly to the field of air circulation for cooling the engine and its equipment.

Motor vehicles, whether combustion or electric, need to evacuate the calories generated by their operation and are therefore equipped with heat exchangers. A motor vehicle heat exchanger generally comprises tubes, in which a heat transfer fluid is intended to circulate, in particular a liquid such as water, and heat exchange elements connected to these tubes, often referred to as " fins "or" spacers ". The fins increase the exchange surface between the tubes and the ambient air.

However, in order to further increase the heat exchange between the coolant and the ambient air, it is frequent that a ventilation device is used in addition, to generate or increase a flow of air directed to the tubes and the fins.

Such a ventilation device most often comprises a propeller fan, which has several disadvantages.

First, the assembly formed by the propeller fan and its motorization system occupies a large volume.

In addition, the distribution of the air vented by the propeller, often placed in the center of the row of tubes, is not homogeneous over the entire surface of the heat exchanger. In particular, some regions of the heat exchanger, such as the ends of the heat pipes and the corners of the heat exchanger, are not or only slightly reached by the air flow ejected by the propeller.

Furthermore, when the start of the ventilation device is not necessary, especially when the heat exchange with the ambient air is sufficient to cool the heat transfer fluid, the blades of the propeller obstruct or "hide" >> in part the flow of ambient air to the tubes and fins. This limits the exchange of heat between the ambient air, on the one hand, and the tubes and fins, on the other hand.

Another disadvantage is that, when the outside temperature is low or negative, the fan propeller blows cold air on the heat exchanger, which has the effect of slowing the temperature rise of the vehicle engine.

Moreover, in this case, the friction of the engine is reduced less rapidly, which increases the consumption of the vehicle and therefore the emission of carbon dioxide.

An object of the invention is to provide a ventilation device for heat exchanger not having at least some of the disadvantages of known heat exchanger ventilation devices. For this purpose, the subject of the invention is a ventilation device intended to generate an air flow towards a motor vehicle heat exchanger, comprising tubes, each tube being provided with at least one opening of ejecting an air flow distinct from its ends, and an element for varying a passage section of at least one of the tubes, said passage section variation element.

Thus, advantageously, the plurality of tubes from which air is ejected makes it possible to replace the conventional propeller disposed in front of the circulation tubes of a heat transfer fluid of the heat exchanger, without presenting the disadvantages mentioned above.

Indeed, with equal heat exchange capacity, the volume occupied by such a ventilation device is much less than a propeller ventilation device. In addition, the distribution of air vented by the tubes is easier to control and can be made more homogeneous.

In addition, thanks to the device according to the invention, it limits the obstruction of the flow of air to the heat exchanger. In fact, the tubes of the ventilation device can advantageously be arranged facing areas of low heat exchange of the heat exchanger, called "dead zones", such as the end faces of the tubes through which the heat transfer fluid, which does not are not in contact with cooling fins. This is not possible with a conventional propeller.

Furthermore, the invention makes it possible to deport the air ejection means supplying air flow to the tubes of the ventilation device, at a distance from the row of heat transfer fluid circulation tubes, which offers greater freedom in the design of the heat exchanger.

In addition, thanks to the passage section variation element, the air flow from the device according to the invention adapts to the engine cooling demand.

According to another characteristic of the invention, the device comprises means for controlling the passage section variation element.

According to another characteristic of the invention, the control means is of the electrical and / or thermal and / or dynamic and / or chemical type.

According to another characteristic of the invention, the passage section variation element is a wall of one of the tubes made of shape memory material, called shape memory wall.

According to another characteristic of the invention, the control means is a power supply source electrically connected to said shape memory wall.

According to another characteristic of the invention, the shape memory material is an alloy based on nickel and titanium.

According to another characteristic of the invention, the device comprises an atomic percentage of 50.2 of nickel and an atomic percentage of 49.8 of titanium.

According to another characteristic of the invention, each tube has a section comprising a leading edge, a trailing edge, opposite to the leading edge, a first and a second profile, each extending between the leading edge. and the trailing edge, said at least one aperture of the tube being on one of the first and second profiles, said at least one aperture being configured such that an airflow exiting the aperture flows along at least a portion of said one of the first and second profiles.

According to another characteristic of the invention, the leading edge is provided with the shape memory wall.

According to another characteristic of the invention, at least one of the tubes is pivotally mounted.

Therefore, the ventilation device according to the present invention proposes an air intake shutter function and a ventilation function of the exchangers in a compact space allowing better thermal management of a motor vehicle, since the grate is blowing.

Depending on the orientation of the tubes, the device makes it possible to adjust the flow of air that arrives at the heat exchanger, making it possible to optimize thermal management.

According to another characteristic of the invention, said at least one pivoting tube is pivotally mounted between a closed position and an open position, the closed position leaving a space between said tube and an adjacent tube which is less than a space between said tube and said adjacent tube in the open position.

Preferably, the tubes are positioned relative to each other so as to block an air flow in the closed position, and so as to circulate a flow of air in the open position. The invention also relates to a heat exchange module for a motor vehicle, comprising a ventilation device as described above, and a heat exchanger, the ventilation device and the heat exchanger being positioned relative to one another. to the other so that a flow of air set in motion by the ventilation device supplies air to the heat exchanger. Other characteristics and advantages of the invention will appear on reading the description which follows. This is purely illustrative and should be read in conjunction with the accompanying drawings in which: - Figure 1 illustrates a perspective view of a heat exchange module equipped with a ventilation device according to the present invention; - Figure 2 illustrates a cross-sectional view of two tubes of Figure 1; FIG. 3 illustrates a cross-sectional view of a ventilation device according to the present invention in a first position; - Figure 4 illustrates a cross sectional view of the ventilation device of Figure 3, in a second position; and FIG. 5 illustrates a perspective view of a detail of a ventilation device according to one embodiment of the invention.

The invention relates to a ventilation device 1 for a motor vehicle. The invention also relates to a heat exchange module 100, comprising the ventilation device 1 and a heat exchanger 101.

As can be seen in FIG. 1, the ventilation device 1 and the heat exchanger 101 are positioned relatively to one another so that a flow of air set in motion by the ventilation device 1 supplies air. the heat exchanger, preferably for cooling the engine of the motor vehicle.

The ventilation device 1 is disposed upstream of the heat exchanger 101 in Figure 1 (relative to a flow of air from outside the moving vehicle). Nevertheless, the ventilation device may also be disposed downstream of the heat exchanger 101.

Ventilation device

As shown in the figures, the ventilation device 1 comprises a plurality of tubes 3.

The tubes are advantageously made of plastic material, or doped plastic, or metal material.

Preferably, the tubes 3 are substantially rectilinear, parallel to each other and aligned so as to form one or more rows of tubes. The set of tubes 3 constitutes a blowing grid 30.

The ventilation device 1 also comprises an air supply device for an air flow F.

This device supplies the ventilation tubes 3 via an air supply circuit 4.

The air supply circuit 4 comprises in particular two air intake manifolds 5 to which the ventilation tubes 3 are connected via air supply inlets at each of their ends 6, 7.

As can be seen in the figures, the two collectors 5 extend parallel to each other, orthogonally to the tubes 3.

One or more turbomachines (not shown) allow the movement of air to the collectors 5.

For example, a turbomachine is positioned at the bottom of each manifold 5.

As can be seen in FIG. 2, each tube 3 comprises a longitudinal wall 19 whose cross-section comprises a free leading edge 11, a trailing edge 15 and first and second profiles 12, 14, each extending between the leading edge 11 and the trailing edge 15.

The trailing edge 15 is preferably arranged opposite the heat exchanger.

The longitudinal wall 19 is delimited by an inner surface 16 and an outer surface 18.

Each opening 10 is made in the longitudinal wall 19 of the tube 3, preferably in one or other of the profiles 12, 14.

In FIG. 2, each opening 10 is positioned near the leading edge 11.

As also visible in Figure 2, the openings 10 of the pair of tubes 3 shown are formed in the profiles 12 facing each other.

Thus, the ventilation tubes 3 and their openings 10 are configured so that the flow of air F flowing in the ventilation tubes 3 is ejected through the opening 10 by flowing along each profile 12, substantially until at their trailing edges 52, by Coanda effect.

The flow of air F ejected from the tubes 3 accelerates another flow F 'in a direction of flow to the heat exchanger.

It should be noted that the cross-sections of the tubes 3 are such that the profiles 12 extend in a direction away from the tubes 3 from the leading edges 11 to the trailing edges 15.

It is noted that in FIG. 5, the illustrated tube 3 comprises two openings 10.

Swivel mounted tubes

At least one of the ventilation tubes 3 is mounted swiveling, preferably pivotable.

In the illustrated embodiment, all the tubes 3 are pivotally mounted.

As can be seen from the figures, the tubes 3 are pivotally mounted between a closed position (FIG. 3) and an open position (FIG. 4), the closed position leaving a space between two adjacent tubes 3 less than a space between two adjacent tubes 3 in the open position.

In other words, the amount of air flowing through the blower gate 30 is greater in the open position than in the closed position.

In the illustrated embodiment, the tubes 3 are positioned relative to each other so as to block an air flow in the closed position, and so as to circulate a flow of air in the open position.

Of course, the invention is not limited to this configuration, and it is quite possible to provide a multitude of positions according to which more or less air passes through the tubes.

Thus, the ventilation device 1 has an air intake shutter function and a ventilation function of the exchangers in a compact space for better thermal management of a motor vehicle, since the gate is blowing.

Depending on the orientation of the tubes, the device 1 makes it possible to adjust the flow rate of air that arrives at the heat exchanger, which also makes it possible to optimize the efficiency of the heat exchanger.

The closed position is advantageous for example when the vehicle is traveling, especially at high speed, since in this position, the drag coefficient of the vehicle is reduced, and its aerodynamics improved.

The open position is advantageous for example when the vehicle is stopped, since in this position, the ventilation of the engine compartment is improved.

Cross section variation element

The ventilation device 1 also comprises a passage section variation element of at least one of the tubes, called section variation element, referenced 20.

In the embodiment illustrated in FIG. 5, the passage section variation element 20 is a wall of one of the tubes 3 made of shape memory material, called the shape memory wall 21.

Preferably, each tube 3 or at least several tubes 3 are provided with a wall 21.

In FIG. 5, it is the leading edge 11 which is provided with the shape-memory wall 21.

Preferably, the leading edge is constituted by the shape memory wall 21.

The shape memory material is an alloy based on nickel and titanium.

Preferably, the alloy comprises an atomic percentage of 50.2 of nickel and an atomic percentage of 49.8 of titanium.

The device 1 comprises a means 22 for controlling the passage section variation element 20.

In FIG. 5, the control means 22 is a power supply source electrically connected to said shape memory wall 21 of the leading edge 21.

Thus, the leading edge 11 reacts to an electric current supplied by the source 22 by expanding or retracting, which varies the passage section of the air ejected by the tube 3.

In fact, the forced air flow (motor) adapts to the cooling demand.

The device 1 makes it possible to scan several operating points without modifying the turbine engine or turbomachines.

Of course, the invention is not limited to the illustrated control means and the control means 22 may also be thermal and / or dynamic and / or chemical.

It is added that the embodiments are combinable to the extent that they are not incompatible.

Claims (11)

1. Ventilation device for generating an air flow towards a motor vehicle heat exchanger, comprising: - tubes (3), each tube (3) being provided with at least one ejection opening (10) an air flow (F) distinct from its ends (6, 7), and - an element (20) for varying a passage section of at least one of the tubes (3), said passage section variation element (20).
2. Ventilation device according to claim 1, comprising means (22) for controlling the passage section variation element (20).
3. Ventilation device according to the preceding claim, wherein the control means (22) is of electrical type and / or thermal and / or dynamic and / or chemical.
4. Ventilation device according to one of the preceding claims, wherein the passage section variation element (20) is a wall of one of the tubes (3) made of shape memory material, called shape memory wall (21).
5. Ventilation device according to the preceding claim, wherein the control means is a power source (22) electrically connected to said shape memory wall (21).
6. Ventilation device according to one of claims 4 or 5, wherein the shape memory material is an alloy based on nickel and titanium.
7. Ventilation device according to the preceding claim, comprising an atomic percentage of 50.2 of nickel and an atomic percentage of 49.8 titanium.
8. Ventilation device according to one of the preceding claims, wherein each tube (3) has a section comprising: - a leading edge (11), - a trailing edge (15), opposite the leading edge. (11), - a first and a second profile (12, 14), each extending between the leading edge (11) and the trailing edge (15), said at least one opening (10) of the tube ( 3) being on one of the first and second profiles (12, 14), said at least one aperture (10) being configured such that an air flow exiting the aperture (10) flows along at least a portion of said one of the first and second profiles (12, 14).
9. Device according to the preceding claim, wherein the leading edge (11) is provided with the shape memory wall (21).
10. Ventilation device according to one of the preceding claims, wherein at least one of the tubes (3) is pivotally mounted.
11. Heat exchange module for a motor vehicle, comprising a ventilation device according to one of the preceding claims, and a heat exchanger, the ventilation device and the heat exchanger being positioned relative to one another. another so that a flow of air set in motion by the ventilation device supplies air to the heat exchanger.
FR1762621A 2017-12-20 2017-12-20 Ventilation device for motor vehicle Pending FR3075264A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR1762621A FR3075264A1 (en) 2017-12-20 2017-12-20 Ventilation device for motor vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1762621A FR3075264A1 (en) 2017-12-20 2017-12-20 Ventilation device for motor vehicle

Publications (1)

Publication Number Publication Date
FR3075264A1 true FR3075264A1 (en) 2019-06-21

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Family Applications (1)

Application Number Title Priority Date Filing Date
FR1762621A Pending FR3075264A1 (en) 2017-12-20 2017-12-20 Ventilation device for motor vehicle

Country Status (1)

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FR (1) FR3075264A1 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1362732A1 (en) * 2002-05-18 2003-11-19 Bayerische Motoren Werke Aktiengesellschaft Actuator for an air regulating flap
WO2010100450A1 (en) * 2009-03-04 2010-09-10 Dyson Technology Limited A fan assembly
US20120168145A1 (en) * 2010-12-31 2012-07-05 Microsoft Corporation Deicing louvers for datacenter applications
JP2014015862A (en) * 2012-07-06 2014-01-30 Calsonic Kansei Corp Cooling fan device
GB2534656A (en) * 2014-11-20 2016-08-03 Ove Arup Partnership Ltd Air mass induction device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1362732A1 (en) * 2002-05-18 2003-11-19 Bayerische Motoren Werke Aktiengesellschaft Actuator for an air regulating flap
WO2010100450A1 (en) * 2009-03-04 2010-09-10 Dyson Technology Limited A fan assembly
US20120168145A1 (en) * 2010-12-31 2012-07-05 Microsoft Corporation Deicing louvers for datacenter applications
JP2014015862A (en) * 2012-07-06 2014-01-30 Calsonic Kansei Corp Cooling fan device
GB2534656A (en) * 2014-11-20 2016-08-03 Ove Arup Partnership Ltd Air mass induction device

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