WO2020058585A1 - Front-end module for a motor vehicle - Google Patents

Front-end module for a motor vehicle Download PDF

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Publication number
WO2020058585A1
WO2020058585A1 PCT/FR2019/051922 FR2019051922W WO2020058585A1 WO 2020058585 A1 WO2020058585 A1 WO 2020058585A1 FR 2019051922 W FR2019051922 W FR 2019051922W WO 2020058585 A1 WO2020058585 A1 WO 2020058585A1
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WO
WIPO (PCT)
Prior art keywords
module
housing
drainage
heat exchanger
orifice
Prior art date
Application number
PCT/FR2019/051922
Other languages
French (fr)
Inventor
Emmanuel Henon
Jerome RIPA
Stephan ANDRE
Original Assignee
Valeo Systemes Thermiques
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 filed Critical Valeo Systemes Thermiques
Publication of WO2020058585A1 publication Critical patent/WO2020058585A1/en

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Classifications

    • 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
    • B60K11/02Arrangement in connection with cooling of propulsion units with liquid cooling
    • B60K11/04Arrangement or mounting of radiators, radiator shutters, or radiator blinds

Definitions

  • the subject of the invention is a front panel module for a motor vehicle and a motor vehicle comprising such a module.
  • a front panel module of a vehicle comprises at least one outside air opening, an air channel which connects the outside air opening to the engine compartment of the vehicle, at least one heat exchanger arranged in the channel air and adapted to be traversed by the outside air flow.
  • the heat exchanger is adapted to be used selectively to cool the air or to heat the air flow according to the needs of the vehicle.
  • the front panel module comprises a motor-fan unit arranged in the air channel.
  • the front panel modules for conventional motor vehicles are designed to exploit the outside air as a low-temperature reservoir, in particular with a view to cooling the internal combustion engine, the passenger compartment of the vehicle, a vehicle battery and / or the charge air supplied to the internal combustion engine as well as exploiting the outside air as a heat reservoir in the case of heat pumps.
  • the external air flow circulating through the corresponding heat exchangers of the front panel module is possible thanks to the dynamic pressure at the front of the vehicle.
  • the front panel module also has a fan which ensures a sufficient flow of fresh air through the heat exchangers, especially when the vehicle is advancing slowly or is stopped.
  • an air conditioning system To cool the interior of the vehicle, or the passenger compartment, an air conditioning system is usually provided, whereas, to heat the interior of the vehicle, in the case of vehicles driven exclusively by an internal combustion engine, the waste engine heat.
  • the waste engine heat In the case of hybrid or electric vehicles, there is much less heat lost by the drive motor, and by Consequently, this waste heat is insufficient for satisfactory heating of the passenger compartment.
  • the air conditioning circuit For heating the passenger compartment of hybrid or electric vehicles, it has therefore already been proposed to use the air conditioning circuit in a reversible manner so that the air conditioning system can also be used as a heat pump to heat the interior of the vehicle.
  • the heat exchanger in the front panel module of the vehicle is therefore used as a condenser for cooling the passenger compartment by yielding enthalpy to the ambient air, and as an evaporator in heat pump mode and during this process, extracts thermal energy to heat the passenger compartment from the outside air by taking enthalpy from the ambient air. During this process, the cooled air condenses, generating condensate.
  • the heat pump mode of the air conditioning system quickly causes undesirable icing of the heat exchanger acting as a refrigerant evaporator, in other words acting as an air flow cooler by taking enthalpy from the ambient air. Indeed, in this mode the air condensates frost due to the low temperatures, as a result of which the heating performance of the heat pump mode drops.
  • the condensates which are normally evacuated by a drain due to their icing, no longer flow and thus close the drain.
  • the object of the invention is therefore to provide a front panel module for a vehicle allowing condensate to flow outside the module whatever the weather conditions.
  • the subject of the invention is a front panel module for a motor vehicle comprising a box with a plurality of walls thus defining a flow duct for an air flow, a drainage orifice being arranged within one of said walls, and at least one heat exchanger being arranged within the housing.
  • the front panel module comprises a defrosting element capable of transmitting the heat generated by the heat exchanger to the drainage orifice.
  • the object according to the invention allows the melting of condensates, the heat exchanger being at a temperature higher than that of the condensates, this makes it possible to avoid any bad odor and to improve the efficiency of the pump mode. heat of the air conditioning system, the water can no longer stagnate in the front panel module.
  • the defrosting element is arranged in thermal contact with the heat exchanger and extends up to the drainage orifice; the defrosting element is arranged in physical contact, direct or indirect, with the heat exchanger and extends to the drainage orifice;
  • the defrosting element is compressed at least partially between a wall of the housing and a wall of the heat exchanger;
  • At least one drainage orifice is disposed at the lowest point of the so-called bottom wall of the housing so that the condensates, generated at the level of a heat exchanger, can be removed from the housing by gravity;
  • the defrosting element comprises a leaf spring intended to be compressed between the so-called bottom wall of the housing where the drainage orifice is located and a wall of the heat exchanger;
  • the defrosting element further comprises a bent end extending at least partially within the drainage orifice
  • the defrosting element comprises a flat part arranged between the spring blade and the bent end, the flat part comprising a fixing means for fixing the defrosting element to said bottom wall of the case in a reversible or irreversible manner;
  • the defrosting element is made of a heat-conductive metallic material
  • the defrosting element being a single piece comprising at least one leaf spring and two bent ends each being associated with a drainage opening;
  • At least one drainage orifice is disposed in an end portion of the bottom wall
  • the drainage opening is arranged at the lowest point of the bottom wall in a service position of the front panel module when the module is installed in the motor vehicle;
  • the bottom wall comprises at least one inclined plane between a so-called top region of the bottom wall and a so-called bottom region of the bottom part, said bottom region comprising said at least one drainage orifice, the top region being at- above the lower region in the service position;
  • the bottom wall comprises a condensate drain pan, the bowl comprising said at least one drainage orifice, and a curved wall up to said at least one drainage orifice, the curved wall comprising said at least one plane tilted;
  • the module includes a condensate drain pipe in said at least one drainage orifice;
  • the housing comprises at least one housing for a device for regulating an incoming air flow for the front panel module, thus the front panel module comprises a device for regulating an air flow comprising a plurality of movable shutters.
  • the invention also relates to a motor vehicle comprising such a front panel module, the vehicle further comprising a conduit for discharging the condensate outside the vehicle.
  • FIG. 1 illustrates a perspective view of a front panel module for a motor vehicle according to the present invention
  • FIG. 2 illustrates a cross-sectional view of the module of Figure 1;
  • FIG. 3 illustrates a partial perspective view of the module of Figure 1;
  • FIG. 6 illustrates a perspective view of the defrosting element.
  • the front panel module for a motor vehicle, and in particular the housing, according to the present invention is configured to sealingly encapsulate at least one heat exchanger, and comprises a housing provided with a bottom wall.
  • encapsulate means that the housing corresponds to a sealed structure adapted to enclose, or coat, the heat exchangers so as to avoid any air leakage between said inlet and said outlet of the housing.
  • the housing is adapted to be fixed on a support for the front face module, for example a support frame also commonly called bolster or carrier, said support being able to form, in the assembled position of the front face module, part of the waterproof structure , the air inlet can also further comprise a set of movable flaps.
  • the front panel module and all of its components extend in a longitudinal (X), transverse (Y) and vertical (Z) direction, for example relative to the axes of the vehicle when the front panel module is installed in the vehicle, as shown by the axes in Figures 1 and 3.
  • upstream or downstream are defined relative to the flow of an air flow circulating through the front panel module.
  • the invention relates to a module 1 of the front panel for a motor vehicle.
  • the module 1 comprises a housing 2 for encapsulating one or more heat exchangers in a sealed manner.
  • the housing 2 comprises an upper part 3, a bottom wall 4 and two lateral uprights 6.
  • the housing 2 may further comprise an air intake wall 5, or a housing for accommodating a bumper beam.
  • the housing 2 by virtue of its sealed structure, encapsulates the heat exchangers and thus ensures that all of the air entering the motor vehicle flows through the heat exchangers arranged in the housing 2.
  • the upper part 3 comprises a removable cover 7 and integral with a cross member 8 to allow the introduction of heat exchangers.
  • the air inlet wall 5 comprises at least one housing 9 for a device 10 for regulating the entry of air into the motor vehicle.
  • the air inlet regulation device 10 corresponds here to a set of movable flaps configured to pivot between a closed position where the air can no longer flow through the module 1, and an open position where air can flow through module 1, such a device is commonly called AGS from the English "Active Grille Shutters".
  • the housing comprises two housings 9.
  • the control device 10 comprises a plurality of flaps 11 movable between a closed position of the air inlet and at least one position of opening the inlet of air.
  • the heat exchangers advantageously rest on the bottom wall 4 of the housing.
  • the bottom wall 4 may include a cross member 12.
  • the housing 2 can also have four peripheral walls: a front peripheral wall, a rear peripheral wall, these front and rear peripheral walls being arranged across the air flow FA, that is to say perpendicular to a first direction longitudinal X of the incoming air flow or of the vehicle, and two lateral peripheral walls which connect the front peripheral wall to the rear peripheral wall by extending parallel to this first longitudinal direction X.
  • the housing 2 further comprises a cover and a bottom wall connecting, respectively, the four peripheral walls to each other.
  • the cover extends between the upper end edges of the peripheral walls and the bottom wall extends between the lower end edges of these peripheral walls, this cover and this bottom wall can thus be inscribed in two planes distinct parallel or substantially parallel.
  • upper and lower refer to an orientation of the cooling unit in a given application example, for example when the front panel module is installed in a motor vehicle, however these terms are not limiting as to the orientation that said cooling unit can take.
  • the housing 2 is a housing for encapsulating the heat exchangers of the module 1 on the front panel which makes it possible to direct the entire flow of air entering this module 1 from the front panel to the front panel towards these heat exchangers. heat and thus limit air loss.
  • At least one of the walls of the housing 2 has at least one orifice 13 for drainage.
  • the term “bottom wall 4” corresponds to a wall of the housing 2 comprising at least one orifice 13 for drainage.
  • the liquid discharged through the drainage opening (s) 13 comes from rainwater, melted snow, washing water, or else condensates flowing from the heat exchanger (s) (by condensation of air on the fins of the heat exchanger).
  • the drainage orifice 13 is disposed at the lowest point of the bottom in a service position of the module, when the front panel module 1 is installed in the motor vehicle.
  • the drainage orifice 13 is disposed at the lowest point of the bottom wall 4 of the housing 2 so that the condensates generated at the heat exchanger can be removed outside the housing 2 by gravitation. This position allows an efficient and certain evacuation of the water contained in the housing 2.
  • the bottom wall 4 comprises at least one inclined plane 14 between a so-called high region, and referenced 15 and a so-called low region, and referenced 16, the low region 16 comprising the drainage orifice 13.
  • the upper region 15 is located above the lower region 16.
  • the inclined plane 14 makes it possible to force the liquid to be evacuated through the orifice
  • the bottom wall 4 of the housing 2 can comprise three orifices 13. Obviously, the bottom wall 4 can comprise a single drainage orifice 13, or two or more.
  • the drainage orifice 13 is arranged at the level of a heat exchanger 20 which will be described later, namely that it is arranged downstream of the air inlet regulating device 10 and that it can be arranged either upstream of, either up to, or downstream of said heat exchanger 20.
  • the terms upstream or downstream being defined with respect to the flow of the air flow.
  • the bottom wall 4 comprises a bowl 17 for discharging liquid associated with each orifice 13 for drainage.
  • the bowl 17 includes the inclined wall 14 around the associated drainage hole 13. In other words, each bowl 17 forms a funnel around the drainage orifice 13, which makes it possible to optimize the evacuation of the liquid from the housing 2.
  • the module comprises a pipe 18 for discharging liquid to guide the condensates out of the module 1 from the front face.
  • the front panel module 1 also includes baffles in the drainage orifice 13 in order to prevent air from entering through the drainage orifice 13.
  • FIG. 3 partially illustrates a front panel module 1 according to the present invention.
  • a heat exchanger 20 in which circulates a heat transfer fluid comprising a bundle of tubes, or plates, and two manifolds arranged on either side of the bundle, is arranged within the module 1 of the front face.
  • the bundle corresponds to a set of elongated tubes (or plates) extending in one direction with a manifold at each end of the tubes (or plates).
  • the heat exchanger 20 comprises fixing means allowing its attachment to the housing 2 of the module 1 of the front face.
  • the heat exchanger 20 is further mounted on pads 21 made of elastomer making it possible to make up for the play tolerances and to absorb the vibrations induced by the movements of the heat exchanger 20, in particular when the vehicle is running. .
  • the front panel module 1 comprises a defrosting element 22.
  • the defrosting element 22 is capable of transmitting the heat generated by the heat exchanger 20 to the drainage orifice 13, as illustrated in FIG. 4
  • the defrosting element 22 is capable of recovering calories from the heat exchanger 20 and of transporting them to the drainage orifice 13.
  • the deicing element 22 can be made of one or more heat conducting materials.
  • metallic materials such as steel, iron or even copper.
  • treated steels for example mild steel which has undergone a zinc galvanization treatment.
  • materials such as ceramics (Alumina), Kapton or Graphite can also correspond to such use.
  • the thermal conductivity of the material used is greater than 10 Wm 1 .K 1 .
  • the deicing element 22 generally corresponds to a metal strip.
  • the deicing element 22 comprises three parts, namely a spring leaf 24 arranged at one end of the deicing element 22, a bent end 26 arranged at the opposite end of the blade spring 24 and a flat part 28 arranged between the spring leaf 24 and the bent end 26.
  • the spring leaf 24 comprises first and second flat parts 24a, 24b substantially parallel to each other, in other words, the blade spring 24 comprises two surfaces which are in two separate planes parallel to each other.
  • a third inclined part 24c connects the two flat parts 24a, 24b to each other.
  • the leaf spring 24 has a Z shape, with the heat exchanger 20 coming to bear on a first planar part 24a, this transmits the heat generated by the heat exchanger 20 towards the other end of the element defrost 22.
  • the third part 24c is inscribed in a plane intersecting the two flat parts 24a, 24b and the third part 24c can be connected to each part 24a, 24b by means of an elbow corresponding here to an acute angle.
  • the defrosting element 22, therefore the leaf spring 24, is made in a single piece forming a continuity of material.
  • a thermal paste can be arranged on the leaf spring 24 at the level of the first flat part 24a in order to improve the contact surface between the defrosting element 22 and the heat exchanger 20.
  • the leaf spring 24 can deform by folding, or by compressing or contracting, and thus reduce in height (Z), in particular the third part 24c, under the weight of the heat exchanger 20 and thus catch up with the play tolerances.
  • the defrosting element 22 comprises a leaf spring 24 intended to be compressed between the bottom wall 4 of the housing 2 where the drainage orifice 13 is located and a wall of the heat exchanger 20.
  • the leaf spring 24 can be replaced by any alternative means capable of deforming while allowing contact with the heat exchanger 20, we can cite by way of example a toric spring.
  • the heat generated by the heat exchanger 20 is transmitted to the defrosting element 22, in particular at the level of the spring leaf 24 and more particularly at the level of the first planar part 24a. Heat then flows through the flat part 28 to the other bent end 26 thanks to the high thermal conductivity of the material of the defrosting element 22. The bent end 26 then heated makes it possible to defrost the frozen condensate at drainage hole 3 and thus ensure good drainage of condensate.
  • the bent end 26 corresponds to a rod or a leg extending, that is to say penetrating, at least partially within the orifice 13 of drainage as illustrated in FIG. 5.
  • the leaf spring 24 and the part plane 28 have an equal width.
  • the bent end 26 may be of greater or equal width. However, in order to minimize the flow of condensate, it is preferable that the width of the bent end 26 is less than the width of the leaf spring 24 and the flat part 28.
  • the drainage orifice 13 has a flared funnel shape.
  • the bent end 26 here has a bend of rounded shape so as to match the shape of the walls of the drainage orifice 13.
  • the invention is not limited to the shape of the bent end 26, it can take any shape, for example to a flat angle tab, or a tab with a bend of an acute, right angle or obtuse.
  • the bent end 26 is configured to follow the shape of the drainage orifice 13.
  • the drainage orifice 13 can have a housing, or a groove, in which the bent end 26 can be introduced so that the deicing element 22 is correctly positioned and fixed to the module 1 from the front face. from either side.
  • the drainage orifice 13 may further comprise another groove 30, or gutter, for the drainage of the condensates.
  • the flat part 28 as illustrated in FIG. 6 allows the defrosting element 22 to be fixed on the bottom wall 4 of the housing 2.
  • the flat part 28 can comprise at least one, here two, recesses 32 to allow with a screw to pass through the flat part and thus fix the defrosting element 22 against the bottom wall 4 of the housing 2.
  • the invention is not limited to the means for fixing the defrosting element 22.
  • the front panel module 1, and more particularly the flat part 28 of the defrosting element 22 comprises a fixing means 34 for fixing the defrosting element 22 at the bottom wall 4 of the housing 2.
  • the defrosting element 22 can be riveted (rivets passing through recesses 32), snap-fit (snaps passing through recesses 32), screwed ( threaded rods passing through recesses 32), nailed (nails passing through recesses 32).
  • the defrosting element can also be glued onto the bottom wall 4, the recesses 32 being in this case not necessary.
  • the bottom wall 4 of the housing 2 may comprise two ribs 36, or bars, projecting from the plane of the bottom wall 4, substantially parallel to each other, the deicing element 22, more particularly the flat part 28, being arranged between the two ribs 36.
  • the deicing element 22 is better positioned and maintained within the front panel module, thus limiting undesirable movements caused by vehicle vibrations.
  • the ribs 36 are preferably of a thickness greater than the thickness of the deicing element 22.
  • the deicing element 22 extends in length in the same direction as the bundle of the heat exchanger 20, namely both in the transverse direction (Y) of the vehicle.
  • the defrosting element 22 extends in length in a direction orthogonal (X) to the direction in which the bundle of the heat exchanger 20 (Y) extends. This can be advantageous if the drainage orifice 13 is arranged upstream or downstream of the heat exchanger 20 with respect to the flow of the air flow.
  • the bottom wall 4 may comprise two drainage orifices 13, the deicing element 22 being a single piece, it can include two connected spring blades, two flat parts and two bent ends each being associated with a drainage orifice. It is also possible to design an Omega-shaped defrost element (W), the heat exchanger pressing against the looped part.
  • W Omega-shaped defrost element
  • the heat exchanger 20 bearing against the defrost element 22 is preferably the radiator 1 of the front panel module.
  • Such a heat exchanger conveys a heat transfer fluid with a temperature oscillating between 50 and 90 ° in operation which makes it possible to defrost the condensates more easily.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Air-Conditioning For Vehicles (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)

Abstract

The invention relates to a front-end module (1) for a motor vehicle, comprising a casing (2) with a plurality of walls (4), thereby defining a duct for an air flow, a drainage hole (13) being arranged inside one of said walls (4), and at least one heat exchanger (20) being arranged inside the casing (2), characterised in that the front-end module (1) comprises a defrosting element (22) which is capable of transmitting the heat generated by the heat exchanger (20) to the drainage hole (13). The invention also relates to a motor vehicle comprising such a module.

Description

MODULE DE FACE AVANT POUR VEHICULE AUTOMOBILE  FRONT PANEL MODULE FOR MOTOR VEHICLE
L’invention a pour objet un module de face avant pour véhicule automobile ainsi qu’un véhicule automobile comprenant un tel module. The subject of the invention is a front panel module for a motor vehicle and a motor vehicle comprising such a module.
Un module de face avant d’un véhicule comprend au moins une ouverture d'air extérieur, un canal d'air qui relie l'ouverture d'air extérieur au compartiment moteur du véhicule, au moins un échangeur de chaleur agencé dans le canal d'air et adapté pour être traversé par le flux d'air extérieur. L’échangeur de chaleur est adapté pour être utilisé sélectivement pour refroidir l’air ou réchauffer le flux d’air selon les besoins du véhicule. De plus, le module de face avant comprend un groupe moto-ventilateur disposé dans le canal d'air. Les modules de face avant pour véhicule automobiles conventionnels sont conçus pour exploiter l'air extérieur comme un réservoir à basse température notamment dans l’optique de refroidir le moteur à combustion interne, l’habitacle du véhicule, une batterie de véhicule et/ou l'air de suralimentation fourni au moteur à combustion interne ainsi que d’exploiter l’air extérieur comme un réservoir de chaleur dans le cas des pompes à chaleur. Le flux d'air extérieur circulant à travers les échangeurs de chaleur correspondants du module de face avant est possible grâce à la pression dynamique à l'avant du véhicule. Cependant, le module de face avant dispose en outre un ventilateur qui assure un débit d'air frais suffisant à travers les échangeurs de chaleur, notamment lorsque que le véhicule avance peu ou est à l’arrêt. A front panel module of a vehicle comprises at least one outside air opening, an air channel which connects the outside air opening to the engine compartment of the vehicle, at least one heat exchanger arranged in the channel air and adapted to be traversed by the outside air flow. The heat exchanger is adapted to be used selectively to cool the air or to heat the air flow according to the needs of the vehicle. In addition, the front panel module comprises a motor-fan unit arranged in the air channel. The front panel modules for conventional motor vehicles are designed to exploit the outside air as a low-temperature reservoir, in particular with a view to cooling the internal combustion engine, the passenger compartment of the vehicle, a vehicle battery and / or the charge air supplied to the internal combustion engine as well as exploiting the outside air as a heat reservoir in the case of heat pumps. The external air flow circulating through the corresponding heat exchangers of the front panel module is possible thanks to the dynamic pressure at the front of the vehicle. However, the front panel module also has a fan which ensures a sufficient flow of fresh air through the heat exchangers, especially when the vehicle is advancing slowly or is stopped.
Pour refroidir l'intérieur du véhicule, ou l’habitacle, un système de climatisation est habituellement prévu, alors que, pour réchauffer l'intérieur du véhicule, dans le cas de véhicules entraînés exclusivement par un moteur à combustion interne, on utilise habituellement la chaleur perdue du moteur. Cependant, dans le cas de véhicules hybrides ou électriques, il y a beaucoup moins de chaleur perdue par le moteur d'entraînement, et par conséquent cette chaleur perdue est insuffisante pour un chauffage satisfaisant de l'habitacle. To cool the interior of the vehicle, or the passenger compartment, an air conditioning system is usually provided, whereas, to heat the interior of the vehicle, in the case of vehicles driven exclusively by an internal combustion engine, the waste engine heat. However, in the case of hybrid or electric vehicles, there is much less heat lost by the drive motor, and by Consequently, this waste heat is insufficient for satisfactory heating of the passenger compartment.
Un chauffage électrique alternatif de l'intérieur du véhicule s'est avéré très énergivore et a un effet indésirable grave sur les besoins énergétiques globaux du véhicule automobile. Alternative electric heating of the interior of the vehicle has been shown to consume a great deal of energy and has a serious adverse effect on the overall energy requirements of the motor vehicle.
Pour le chauffage de l'habitacle de véhicules hybrides ou électriques, il a donc déjà été proposé d’utiliser le circuit de climatisation de manière réversible de sorte que le système de climatisation puisse également être utilisé comme pompe à chaleur pour chauffer l'intérieur du véhicule. For heating the passenger compartment of hybrid or electric vehicles, it has therefore already been proposed to use the air conditioning circuit in a reversible manner so that the air conditioning system can also be used as a heat pump to heat the interior of the vehicle.
L'échangeur de chaleur dans le module de face avant du véhicule est donc utilisé comme condenseur pour le refroidissement de l'habitacle en cédant de l’enthalpie à l’air ambiant, et comme évaporateur en mode pompe à chaleur et au cours de ce processus, extrait l'énergie thermique pour réchauffer l’habitacle à partir de l'air extérieur en prélevant de l’enthalpie sur l’air ambiant. Au cours de ce processus, l’air refroidit se condense générant ainsi des condensats. The heat exchanger in the front panel module of the vehicle is therefore used as a condenser for cooling the passenger compartment by yielding enthalpy to the ambient air, and as an evaporator in heat pump mode and during this process, extracts thermal energy to heat the passenger compartment from the outside air by taking enthalpy from the ambient air. During this process, the cooled air condenses, generating condensate.
Cependant, en particulier par temps humide et froid (températures inférieures à -10°C), le mode pompe à chaleur du système de climatisation entraîne rapidement un givrage indésirable de l'échangeur de chaleur agissant comme un évaporateur de réfrigérant, autrement dit agissant comme un refroidisseur du flux d’air en prélevant de l’enthalpie sur l’air ambiant. En effet, dans ce mode les condensats de l’air givrent à cause des faibles températures, à la suite de quoi les performances de réchauffage du mode pompe à chaleur chutent. De plus, les condensats qui sont normalement évacués par un drain, de par leur givrage ne s’écoulent plus et obturent ainsi le drain. Le but de l'invention est donc de fournir un module de face avant pour véhicule permettant aux condensats de s’écouler en dehors du module quelque soit les conditions météorologiques. However, especially in wet and cold weather (temperatures below -10 ° C), the heat pump mode of the air conditioning system quickly causes undesirable icing of the heat exchanger acting as a refrigerant evaporator, in other words acting as an air flow cooler by taking enthalpy from the ambient air. Indeed, in this mode the air condensates frost due to the low temperatures, as a result of which the heating performance of the heat pump mode drops. In addition, the condensates which are normally evacuated by a drain, due to their icing, no longer flow and thus close the drain. The object of the invention is therefore to provide a front panel module for a vehicle allowing condensate to flow outside the module whatever the weather conditions.
A cet effet, l’invention a pour objet un module de face avant pour véhicule automobile comprenant un boiter avec une pluralité de parois définissant ainsi un conduit d’écoulement pour un flux d’air, un orifice de drainage étant agencé au sein d’une desdites parois, et au moins un échangeur de chaleur étant agencé au sein du boîtier. Selon l’invention, le module de face avant comprend un élément de dégivrage apte à transmettre la chaleur générée par l’échangeur de chaleur vers l’orifice de drainage. To this end, the subject of the invention is a front panel module for a motor vehicle comprising a box with a plurality of walls thus defining a flow duct for an air flow, a drainage orifice being arranged within one of said walls, and at least one heat exchanger being arranged within the housing. According to the invention, the front panel module comprises a defrosting element capable of transmitting the heat generated by the heat exchanger to the drainage orifice.
Ainsi l’objet selon l’invention permet la fonte de des condensats, l’échangeur de chaleur étant à une température supérieure à celle des condensats, cela permet d’éviter toute mauvaise odeur et d’améliorer l’efficacité du mode de pompe à chaleur du système de climatisation, l’eau ne pouvant plus stagner au sein du module de face avant. Thus the object according to the invention allows the melting of condensates, the heat exchanger being at a temperature higher than that of the condensates, this makes it possible to avoid any bad odor and to improve the efficiency of the pump mode. heat of the air conditioning system, the water can no longer stagnate in the front panel module.
D’autres mode de réalisation proposent que : Other embodiments propose that:
l’élément de dégivrage est agencé au contact thermique de l’échangeur de chaleur et s’étend jusqu’à l’orifice de drainage ; l’élément de dégivrage est agencé au contact physique, direct ou indirect, de l’échangeur de chaleur et s’étend jusqu’à l’orifice de drainage ;  the defrosting element is arranged in thermal contact with the heat exchanger and extends up to the drainage orifice; the defrosting element is arranged in physical contact, direct or indirect, with the heat exchanger and extends to the drainage orifice;
l’élément de dégivrage est compressé au moins partiellement entre une paroi du boîtier et une paroi de l’échangeur de chaleur ; the defrosting element is compressed at least partially between a wall of the housing and a wall of the heat exchanger;
- ledit au moins un orifice de drainage est disposé au point le plus bas de la paroi dite de fond du boîtier de sorte que les condensats, générés au niveau d’un échangeur de chaleur, puissent s’évacuer en dehors du boîtier par gravitation ; - l’élément de dégivrage comprend une lame ressort destinée à être compressée entre la paroi dite de fond du boitier où est situé l’orifice de drainage et une paroi de l’échangeur de chaleur ; - Said at least one drainage orifice is disposed at the lowest point of the so-called bottom wall of the housing so that the condensates, generated at the level of a heat exchanger, can be removed from the housing by gravity; - The defrosting element comprises a leaf spring intended to be compressed between the so-called bottom wall of the housing where the drainage orifice is located and a wall of the heat exchanger;
- l’élément de dégivrage comprend en outre une extrémité coudée s’étendant au moins partiellement au sein de l’orifice de drainage ; - the defrosting element further comprises a bent end extending at least partially within the drainage orifice;
- l’élément de dégivrage comprend une partie plane agencée entre la lame ressort et l’extrémité coudée, la partie plane comprenant un moyen de fixation pour fixer l’élément de dégivrage à ladite paroi de fond du boitier de manière réversible ou irréversible ; the defrosting element comprises a flat part arranged between the spring blade and the bent end, the flat part comprising a fixing means for fixing the defrosting element to said bottom wall of the case in a reversible or irreversible manner;
- l’élément de dégivrage est réalisé dans un matériau métallique conducteur de chaleur  - the defrosting element is made of a heat-conductive metallic material
- ladite paroi de fond comprend au moins deux orifices de drainage, l’élément de dégivrage étant une pièce monobloc comprenant au moins une lame ressort et deux extrémités coudées chacune étant associée à un orifice de drainage ;  - Said bottom wall comprises at least two drainage openings, the defrosting element being a single piece comprising at least one leaf spring and two bent ends each being associated with a drainage opening;
- deux nervures sont agencées sur ladite paroi de fond du boitier, l’élément de dégivrage étant agencé au moins partiellement entre les deux nervures ;  - two ribs are arranged on said bottom wall of the housing, the deicing element being arranged at least partially between the two ribs;
- ledit au moins un orifice de drainage est disposé dans une portion d’extrémité de la paroi de fond ;  - Said at least one drainage orifice is disposed in an end portion of the bottom wall;
- l’orifice de drainage est disposé au point le plus bas de la paroi de fond dans une position de service du module de face avant lorsque le module est installé dans le véhicule automobile ;  - The drainage opening is arranged at the lowest point of the bottom wall in a service position of the front panel module when the module is installed in the motor vehicle;
- la paroi de fond comprend au moins un plan incliné entre une région dite haute de la paroi de fond et une région dite basse de la partie de fond, ladite région basse comprenant ledit au moins un orifice de drainage, la région haute étant au-dessus de la région basse en position de service ;  the bottom wall comprises at least one inclined plane between a so-called top region of the bottom wall and a so-called bottom region of the bottom part, said bottom region comprising said at least one drainage orifice, the top region being at- above the lower region in the service position;
- la paroi de fond comprend une cuvette d’évacuation des condensats, la cuvette comportant ledit au moins un orifice de drainage, et une paroi incurvée jusqu’audit au moins un orifice de drainage, la paroi incurvée comprenant ledit au moins un plan incliné ; - The bottom wall comprises a condensate drain pan, the bowl comprising said at least one drainage orifice, and a curved wall up to said at least one drainage orifice, the curved wall comprising said at least one plane tilted;
- le module comprend un conduit d’évacuation des condensats dans ledit au moins un orifice de drainage ;  - The module includes a condensate drain pipe in said at least one drainage orifice;
- le boîtier comprend au moins un logement pour un dispositif de régulation d’un flux d’air entrant pour le module de face avant, ainsi le module de face avant comprend un dispositif de régulation d’un flux d’air comprenant une pluralité de volets mobiles.  the housing comprises at least one housing for a device for regulating an incoming air flow for the front panel module, thus the front panel module comprises a device for regulating an air flow comprising a plurality of movable shutters.
L’invention a également pour objet un véhicule automobile comprenant un tel module de face avant, le véhicule comprenant en outre un conduit pour évacuer les condensats à l’extérieur du véhicule. The invention also relates to a motor vehicle comprising such a front panel module, the vehicle further comprising a conduit for discharging the condensate outside the vehicle.
D’autres caractéristiques et avantages de l’invention apparaîtront encore à la lecture de la description qui va suivre. Other characteristics and advantages of the invention will become apparent on reading the description which follows.
Celle-ci est purement illustrative et doit être lue en regard des dessins annexés sur lesquels : This is purely illustrative and should be read in conjunction with the accompanying drawings in which:
- la figure 1 illustre une vue en perspective d’un module de face avant pour véhicule automobile selon la présente invention ;  - Figure 1 illustrates a perspective view of a front panel module for a motor vehicle according to the present invention;
- la figure 2 illustre une vue en coupe transversale du module de la figure 1 ;  - Figure 2 illustrates a cross-sectional view of the module of Figure 1;
- la figure 3 illustre une vue partielle en perspective du module de la figure 1 ;  - Figure 3 illustrates a partial perspective view of the module of Figure 1;
- la figure 4 illustre une vue détaillée de la figure 3 ;  - Figure 4 illustrates a detailed view of Figure 3;
- la figure 5 illustre une vue détaillée de la figure 4 ;  - Figure 5 illustrates a detailed view of Figure 4;
- la figure 6 illustre une vue en perspective de l’élément de dégivrage.  - Figure 6 illustrates a perspective view of the defrosting element.
Le module de face avant pour véhicule automobile, et en particulier le boîtier, selon la présente invention est configuré pour encapsuler de manière étanche au moins un échangeur de chaleur, et comprend un boîtier muni d’une paroi de fond. Par « encapsuler » on entend que le boitier correspond à une structure étanche adaptée pour enfermer, ou enrober, les échangeurs de chaleur de manière à éviter toute fuite d’air entre ladite entrée et ladite sortie du boitier. Le boitier est adapté pour être fixé sur un support pour le module de face avant, par exemple un cadre support aussi communément appelé bolster ou carrier, ledit support pouvant former, dans la position assemblée du module de face avant, une partie de la structure étanche, l’entrée d’air peut aussi comprendre en outre un ensemble de volets mobiles. The front panel module for a motor vehicle, and in particular the housing, according to the present invention is configured to sealingly encapsulate at least one heat exchanger, and comprises a housing provided with a bottom wall. By "encapsulate" means that the housing corresponds to a sealed structure adapted to enclose, or coat, the heat exchangers so as to avoid any air leakage between said inlet and said outlet of the housing. The housing is adapted to be fixed on a support for the front face module, for example a support frame also commonly called bolster or carrier, said support being able to form, in the assembled position of the front face module, part of the waterproof structure , the air inlet can also further comprise a set of movable flaps.
Le module de face avant et tous ses composants s’étendent selon une direction longitudinale (X), transversale (Y) et verticale (Z), par exemple par rapport aux axes du véhicule lorsque le module de face avant est installé dans le véhicule, comme représenté par les axes sur les figure 1 et 3. The front panel module and all of its components extend in a longitudinal (X), transverse (Y) and vertical (Z) direction, for example relative to the axes of the vehicle when the front panel module is installed in the vehicle, as shown by the axes in Figures 1 and 3.
Les termes amont ou aval sont définis par rapport à l’écoulement d’un flux d’air circulant à travers le module de face avant. The terms upstream or downstream are defined relative to the flow of an air flow circulating through the front panel module.
L’invention a pour objet un module 1 de face avant pour véhicule automobile. The invention relates to a module 1 of the front panel for a motor vehicle.
Comme visible sur la figure 1 , le module 1 comprend un boîtier 2 pour encapsuler un ou plusieurs échangeurs de chaleur de manière étanche. As shown in Figure 1, the module 1 comprises a housing 2 for encapsulating one or more heat exchangers in a sealed manner.
Le boîtier 2 comprend une partie supérieure 3 une paroi 4 de fond et deux montant latéraux 6. Le boitier 2 peut comprendre en outre une paroi d’entrée d’air 5, ou un logement pour accueillir une poutre pare-choc. The housing 2 comprises an upper part 3, a bottom wall 4 and two lateral uprights 6. The housing 2 may further comprise an air intake wall 5, or a housing for accommodating a bumper beam.
Le boîtier 2, de par sa structure étanche, encapsule les échangeurs de chaleur et assure ainsi que l’intégralité de l’air entrant dans le véhicule automobile s’écoule à travers les échangeurs de chaleur agencés dans le boîtier 2. Comme visible sur la figure 1 , la partie supérieure 3 comprend un couvercle 7 amovible et solidaire d’une traverse 8 pour permettre l’introduction des échangeurs de chaleur. La paroi d’entrée d’air 5 comprend au moins un logement 9 pour un dispositif de régulation 10 d’entrée d’air dans le véhicule automobile. Le dispositif de régulation 10 d’entrée d’air correspond ici à un ensemble de volets mobiles configurés pour pivoter entre une position de fermeture où l’air ne peut plus s’écouler à travers le module 1 , et une position d’ouverture où l’air peut s’écouler à travers le module 1 , un tel dispositif est communément appelé AGS de l’anglais « Active Grille Shutters ». The housing 2, by virtue of its sealed structure, encapsulates the heat exchangers and thus ensures that all of the air entering the motor vehicle flows through the heat exchangers arranged in the housing 2. As shown in Figure 1, the upper part 3 comprises a removable cover 7 and integral with a cross member 8 to allow the introduction of heat exchangers. The air inlet wall 5 comprises at least one housing 9 for a device 10 for regulating the entry of air into the motor vehicle. The air inlet regulation device 10 corresponds here to a set of movable flaps configured to pivot between a closed position where the air can no longer flow through the module 1, and an open position where air can flow through module 1, such a device is commonly called AGS from the English "Active Grille Shutters".
Sur la figure 1 , le boîtier comprend deux logements 9. Le dispositif de régulation 10 comporte une pluralité de volets 1 1 mobiles entre une position d’obturation de l’entrée d’air et au moins une position d’ouverture de l’entrée d’air. In Figure 1, the housing comprises two housings 9. The control device 10 comprises a plurality of flaps 11 movable between a closed position of the air inlet and at least one position of opening the inlet of air.
Les échangeurs de chaleur reposent avantageusement sur la paroi 4 de fond du boîtier. The heat exchangers advantageously rest on the bottom wall 4 of the housing.
La paroi 4 de fond peut comprendre une traverse 12. The bottom wall 4 may include a cross member 12.
Le boîtier 2 peut présenter en outre quatre parois périphériques : une paroi périphérique avant, une paroi périphérique arrière, ces parois périphériques avant et arrière étant agencées en travers du flux d’air FA, c’est-à-dire perpendiculairement à une première direction longitudinale X du flux d’air entrant ou du véhicule, et deux parois périphériques latérales qui relient la paroi périphérique avant à la paroi périphérique arrière en s’étendant parallèlement à cette première direction longitudinale X. Le boîtier 2 comprend en outre un couvercle et une paroi de fond reliant, respectivement, les quatre parois périphériques entre elles. Autrement dit, le couvercle s’étend entre des bords d’extrémité supérieure des parois périphériques et la paroi de fond s’étend entre des bords d’extrémité inférieure de ces parois périphériques, ce couvercle et cette paroi de fond pouvant ainsi s’inscrire dans deux plans distincts parallèles ou sensiblement parallèles. The housing 2 can also have four peripheral walls: a front peripheral wall, a rear peripheral wall, these front and rear peripheral walls being arranged across the air flow FA, that is to say perpendicular to a first direction longitudinal X of the incoming air flow or of the vehicle, and two lateral peripheral walls which connect the front peripheral wall to the rear peripheral wall by extending parallel to this first longitudinal direction X. The housing 2 further comprises a cover and a bottom wall connecting, respectively, the four peripheral walls to each other. In other words, the cover extends between the upper end edges of the peripheral walls and the bottom wall extends between the lower end edges of these peripheral walls, this cover and this bottom wall can thus be inscribed in two planes distinct parallel or substantially parallel.
Il est entendu que les termes « supérieur » et « inférieur » se rapporte à une orientation de l’unité de refroidissement dans un exemple d’application donné, par exemple lorsque le module de face avant est installé dans un véhicule automobile, toutefois ces termes ne sont pas limitatifs quant à l’orientation que peut prendre ladite unité de refroidissement. It is understood that the terms “upper” and “lower” refer to an orientation of the cooling unit in a given application example, for example when the front panel module is installed in a motor vehicle, however these terms are not limiting as to the orientation that said cooling unit can take.
On comprend donc que le boîtier 2 est un boîtier d’encapsulage des échangeurs de chaleur du module 1 de face avant qui permet de diriger l’intégralité du flux d’air entrant dans ce module 1 de face avant pour face avant vers ces échangeurs de chaleur et ainsi de limiter les déperditions d’air. Au moins une des parois du boîtier 2 comporte au moins un orifice 13 de drainage. Dans la suite de la description, le terme « paroi 4 de fond » correspond à une paroi du boîtier 2 comportant au moins un orifice 13 de drainage. Le liquide évacué par le ou les orifices 13 de drainage est issu d’eau de pluie, de neige fondue, d’eau de lavage, ou encore de condensats s’écoulant depuis le ou les échangeurs de chaleur (par condensation de l’air sur les ailettes de l’échangeur de chaleur). De préférence, l’orifice 13 de drainage est disposé au point le plus bas du fond dans une position de service du module, lorsque le module 1 de face avant est installé dans le véhicule automobile. En d’autres termes, l’orifice 13 de drainage est disposé au point le plus bas de la paroi 4 de fond du boîtier 2 de sorte que les condensats générés au niveau de l’échangeur de chaleur puissent s’évacuer en dehors du boîtier 2 par gravitation. Cette position permet une évacuation efficace et certaine de l’eau contenue dans le boîtier 2. It is therefore understood that the housing 2 is a housing for encapsulating the heat exchangers of the module 1 on the front panel which makes it possible to direct the entire flow of air entering this module 1 from the front panel to the front panel towards these heat exchangers. heat and thus limit air loss. At least one of the walls of the housing 2 has at least one orifice 13 for drainage. In the following description, the term “bottom wall 4” corresponds to a wall of the housing 2 comprising at least one orifice 13 for drainage. The liquid discharged through the drainage opening (s) 13 comes from rainwater, melted snow, washing water, or else condensates flowing from the heat exchanger (s) (by condensation of air on the fins of the heat exchanger). Preferably, the drainage orifice 13 is disposed at the lowest point of the bottom in a service position of the module, when the front panel module 1 is installed in the motor vehicle. In other words, the drainage orifice 13 is disposed at the lowest point of the bottom wall 4 of the housing 2 so that the condensates generated at the heat exchanger can be removed outside the housing 2 by gravitation. This position allows an efficient and certain evacuation of the water contained in the housing 2.
La paroi 4 de fond comprend au moins un plan incliné 14 entre une région dite haute, et référencée 15 et une région dite basse, et référencée 16, la région basse 16 comprenant l’orifice 13 de drainage. The bottom wall 4 comprises at least one inclined plane 14 between a so-called high region, and referenced 15 and a so-called low region, and referenced 16, the low region 16 comprising the drainage orifice 13.
En position de service, la région haute 15 est située au-dessus de la région basse 16. Le plan incliné 14 permet de forcer l’évacuation du liquide par l’orificeIn the service position, the upper region 15 is located above the lower region 16. The inclined plane 14 makes it possible to force the liquid to be evacuated through the orifice
13 de drainage. 13 drainage.
Comme il ressort de la figure 2 la paroi 4 de fond du boîtier 2 peut comprendre trois orifices 13. Bien évidemment, la paroi 4 de fond peut comprendre un unique orifice 13 de drainage, ou deux ou plus. As can be seen from FIG. 2, the bottom wall 4 of the housing 2 can comprise three orifices 13. Obviously, the bottom wall 4 can comprise a single drainage orifice 13, or two or more.
L’orifice 13 de drainage est agencé au niveau d’un échangeur de chaleur 20 qui sera décrit ultérieurement, à savoir qu’il est agencé en aval du dispositif de régulation 10 d’entrée d’air et qu’il peut être agencé soit en amont de, soit à hauteur de, soit en aval dudit échangeur de chaleur 20. Les termes amont ou aval étant définis par rapport à l’écoulement du flux d’air. The drainage orifice 13 is arranged at the level of a heat exchanger 20 which will be described later, namely that it is arranged downstream of the air inlet regulating device 10 and that it can be arranged either upstream of, either up to, or downstream of said heat exchanger 20. The terms upstream or downstream being defined with respect to the flow of the air flow.
Comme également visible sur la figure 2, la paroi 4 de fond comprend une cuvette 17 d’évacuation de liquide associée à chaque orifice 13 de drainage.  As also visible in FIG. 2, the bottom wall 4 comprises a bowl 17 for discharging liquid associated with each orifice 13 for drainage.
La cuvette 17 comprend la paroi inclinée 14 autour de l’orifice 13 de drainage associé. En d’autres termes, chaque cuvette 17 forme un entonnoir autour de l'orifice 13 de drainage, ce qui permet d’optimiser l’évacuation du liquide hors du boîtier 2. The bowl 17 includes the inclined wall 14 around the associated drainage hole 13. In other words, each bowl 17 forms a funnel around the drainage orifice 13, which makes it possible to optimize the evacuation of the liquid from the housing 2.
Comme visible sur la figure 2, le module comprend un tuyau 18 d’évacuation de liquide pour guider les condensats hors du module 1 de face avant. Eventuellement, le module 1 de face avant comprend également des chicanes dans l'orifice 13 de drainage afin d’empêcher l’air de pénétrer par l'orifice 13 de drainage. As visible in FIG. 2, the module comprises a pipe 18 for discharging liquid to guide the condensates out of the module 1 from the front face. Optionally, the front panel module 1 also includes baffles in the drainage orifice 13 in order to prevent air from entering through the drainage orifice 13.
Il est également possible de prévoir une membrane ou un clapet anti retour, afin de fermer l'orifice 13 de drainage quand le liquide ne s’écoule pas. It is also possible to provide a membrane or a non-return valve, in order to close the drainage orifice 13 when the liquid does not flow.
La figure 3 illustre en partie un module 1 de face avant selon la présente invention. Un échangeur de chaleur 20 dans lequel circule un fluide caloporteur comprenant un faisceau de tubes, ou de plaques, et deux boîtes collectrices agencées de part et d’autre du faisceau, est agencé au sein du module 1 de face avant. Le faisceau correspond à un ensemble de tubes (ou plaques) allongés s’étendant dans une direction avec une boite collectrice à chaque extrémité des tubes (ou plaques). L’échangeur de chaleur 20 comprend des moyens de fixation permettant sa solidarisation au boîtier 2 du module 1 de face avant. L’échangeur de chaleur 20 est monté en outre sur des plots 21 en élastomère permettant de rattraper les tolérances de jeu et d’absorber les vibrations induites par les mouvements de l’échangeur de chaleur 20, notamment lorsque le véhicule est en train de rouler. Le module 1 de face avant selon l’invention comprend un élément de dégivrage 22. L’élément de dégivrage 22 est apte à transmettre la chaleur générée par l’échangeur de chaleur 20 vers l’orifice 13 de drainage, comme illustré en figure 4. Autrement dit, l’élément de dégivrage 22 est capable de récupérer des calories au niveau de l’échangeur de chaleur 20 et de les véhiculer jusqu’à l’orifice 13 de drainage. FIG. 3 partially illustrates a front panel module 1 according to the present invention. A heat exchanger 20 in which circulates a heat transfer fluid comprising a bundle of tubes, or plates, and two manifolds arranged on either side of the bundle, is arranged within the module 1 of the front face. The bundle corresponds to a set of elongated tubes (or plates) extending in one direction with a manifold at each end of the tubes (or plates). The heat exchanger 20 comprises fixing means allowing its attachment to the housing 2 of the module 1 of the front face. The heat exchanger 20 is further mounted on pads 21 made of elastomer making it possible to make up for the play tolerances and to absorb the vibrations induced by the movements of the heat exchanger 20, in particular when the vehicle is running. . The front panel module 1 according to the invention comprises a defrosting element 22. The defrosting element 22 is capable of transmitting the heat generated by the heat exchanger 20 to the drainage orifice 13, as illustrated in FIG. 4 In other words, the defrosting element 22 is capable of recovering calories from the heat exchanger 20 and of transporting them to the drainage orifice 13.
Pour cela, l’élément de dégivrage 22 peut être réalisé en un ou plusieurs matériaux conducteurs de chaleur. Nous pouvons citer à titre non exhaustif, les matériaux métalliques tels que de l’acier, du fer ou encore du cuivre. Nous pouvons aussi citer des aciers traités, par exemple un acier doux ayant subi un traitement de galvanisation au zinc. Toujours à titre non limitatif, des matériaux tels que les céramiques (Alumine), le Kapton ou encore le Graphite peuvent aussi correspondre à un tel usage. A titre d’exemple, il est préférable que la conductivité thermique du matériau utilisé soit supérieur à 10 W.m 1.K 1. L’élément de dégivrage 22 correspond généralement à une bande métallique. For this, the deicing element 22 can be made of one or more heat conducting materials. We can cite, without being exhaustive, metallic materials such as steel, iron or even copper. We can also cite treated steels, for example mild steel which has undergone a zinc galvanization treatment. Still without limitation, materials such as ceramics (Alumina), Kapton or Graphite can also correspond to such use. For example, it is preferable that the thermal conductivity of the material used is greater than 10 Wm 1 .K 1 . The deicing element 22 generally corresponds to a metal strip.
Dans l’exemple illustré en figure 6, l’élément de dégivrage 22 comprend trois parties, à savoir une lame ressort 24 agencée à une extrémité de l’élément de dégivrage 22, une extrémité coudée 26 agencée à l’extrémité opposée de la lame ressort 24 et une partie plane 28 agencée entre la lame ressort 24 et l’extrémité coudée 26. La lame ressort 24 comprend une première et une deuxième parties planes 24a, 24b sensiblement parallèles l’une à l’autre, autrement dit, la lame ressort 24 comprend deux surfaces qui s’inscrivent dans deux plans distincts parallèles l’un à l’autre. Une troisième partie 24c inclinée relie les deux parties planes 24a, 24b l’une à l’autre. En d’autres termes, la lame ressort 24 présente une forme en Z, avec l’échangeur de chaleur 20 venant en appui sur une première partie plane 24a, celle-ci transmet la chaleur générée par l’échangeur de chaleur 20 vers l’autre extrémité de l’élément de dégivrage 22. La troisième partie 24c est inscrite dans un plan sécant aux deux parties planes 24a, 24b et la troisième partie 24c peut être relié à chaque partie 24a, 24b par l’intermédiaire d’un coude correspondant ici à un angle aigu. In the example illustrated in FIG. 6, the deicing element 22 comprises three parts, namely a spring leaf 24 arranged at one end of the deicing element 22, a bent end 26 arranged at the opposite end of the blade spring 24 and a flat part 28 arranged between the spring leaf 24 and the bent end 26. The spring leaf 24 comprises first and second flat parts 24a, 24b substantially parallel to each other, in other words, the blade spring 24 comprises two surfaces which are in two separate planes parallel to each other. A third inclined part 24c connects the two flat parts 24a, 24b to each other. In other words, the leaf spring 24 has a Z shape, with the heat exchanger 20 coming to bear on a first planar part 24a, this transmits the heat generated by the heat exchanger 20 towards the other end of the element defrost 22. The third part 24c is inscribed in a plane intersecting the two flat parts 24a, 24b and the third part 24c can be connected to each part 24a, 24b by means of an elbow corresponding here to an acute angle.
L’élément de dégivrage 22, donc la lame ressort 24, est réalisé en une seule pièce monobloc formant continuité de matière. The defrosting element 22, therefore the leaf spring 24, is made in a single piece forming a continuity of material.
A titre d’alternative une pâte thermique peut être agencée sur la lame ressort 24 au niveau de la première partie plane 24a afin d’améliorer la surface de contact entre l’élément de dégivrage 22 et l’échangeur de chaleur 20. Alternatively, a thermal paste can be arranged on the leaf spring 24 at the level of the first flat part 24a in order to improve the contact surface between the defrosting element 22 and the heat exchanger 20.
La lame ressort 24 peut se déformer en se repliant, ou en se comprimant ou contractant, et réduire ainsi en hauteur (Z), notamment la troisième partie 24c, sous le poids de l’échangeur de chaleur 20 et rattraper ainsi les tolérances de jeu. Autrement dit, l’élément de dégivrage 22 comprend une lame ressort 24 destinée à être compressée entre la paroi 4 de fond du boitier 2 où est situé l’orifice 13 de drainage et une paroi de l’échangeur de chaleur 20. The leaf spring 24 can deform by folding, or by compressing or contracting, and thus reduce in height (Z), in particular the third part 24c, under the weight of the heat exchanger 20 and thus catch up with the play tolerances. In other words, the defrosting element 22 comprises a leaf spring 24 intended to be compressed between the bottom wall 4 of the housing 2 where the drainage orifice 13 is located and a wall of the heat exchanger 20.
La lame ressort 24 peut être remplacée par tout moyen alternatif apte à se déformer tout en permettant un contact avec l’échangeur de chaleur 20, nous pouvons citer à titre d’exemple un ressort torique. The leaf spring 24 can be replaced by any alternative means capable of deforming while allowing contact with the heat exchanger 20, we can cite by way of example a toric spring.
La chaleur générée par l’échangeur de chaleur 20 est transmise à l’élément de dégivrage 22, notamment au niveau de la lame ressort 24 et plus particulièrement au niveau de la première partie plane 24a. La chaleur circule alors à travers la partie plane 28 jusqu’à l’autre extrémité coudée 26 grâce à la conductivité thermique élevée du matériau de l’élément de dégivrage 22. L’extrémité coudée 26 alors chauffée permet de dégivrer les condensats gelés au niveau de l’orificel 3 de drainage et d’assurer ainsi un bon écoulement des condensats. The heat generated by the heat exchanger 20 is transmitted to the defrosting element 22, in particular at the level of the spring leaf 24 and more particularly at the level of the first planar part 24a. Heat then flows through the flat part 28 to the other bent end 26 thanks to the high thermal conductivity of the material of the defrosting element 22. The bent end 26 then heated makes it possible to defrost the frozen condensate at drainage hole 3 and thus ensure good drainage of condensate.
L’extrémité coudée 26 correspond à une tige ou une patte s’étendant, c'est-à-dire pénétrant, au moins partiellement au sein de l’orifice 13 de drainage comme illustré en figure 5. La lame ressort 24 et la partie plane 28 ont une largueur égale. L’extrémité coudée 26 peut être de largueur supérieure ou égale. Toutefois, afin de faire le moins obstacle à l’écoulement des condensats, il est préférable que la largueur de l’extrémité coudée 26 soit inférieure à la largueur de la lame ressort 24 et de la partie plane 28. The bent end 26 corresponds to a rod or a leg extending, that is to say penetrating, at least partially within the orifice 13 of drainage as illustrated in FIG. 5. The leaf spring 24 and the part plane 28 have an equal width. The bent end 26 may be of greater or equal width. However, in order to minimize the flow of condensate, it is preferable that the width of the bent end 26 is less than the width of the leaf spring 24 and the flat part 28.
Tel qu’illustré en figure 5, l’orifice 13 de drainage a une forme en entonnoir évasé. L’extrémité coudée 26 présente ici un coude de forme arrondie de manière à épouser la forme des parois de l’orifice 13 de drainage. Bien évidemment l’invention ne se limite pas à la forme de l’extrémité coudée 26, celle-ci peut adopter toute forme, par exemple à une patte d’angle plat, ou une patte avec un coude d’un angle aigu, droit ou obtus. Autrement dit, l’extrémité coudée 26 est configurée pour épouser la forme de l’orifice 13 de drainage. Selon un mode de réalisation, l’orifice 13 de drainage peut présenter un logement, ou une rainure, dans lequel l’extrémité coudée 26 peut être introduite afin que l’élément de dégivrage 22 soit correctement positionné et fixé au module 1 de face avant de part et d’autre. L’orifice 13 de drainage peut comprendre en outre une autre rainure 30, ou gouttière, pour l’écoulement des condensats. As illustrated in FIG. 5, the drainage orifice 13 has a flared funnel shape. The bent end 26 here has a bend of rounded shape so as to match the shape of the walls of the drainage orifice 13. Obviously the invention is not limited to the shape of the bent end 26, it can take any shape, for example to a flat angle tab, or a tab with a bend of an acute, right angle or obtuse. In other words, the bent end 26 is configured to follow the shape of the drainage orifice 13. According to one embodiment, the drainage orifice 13 can have a housing, or a groove, in which the bent end 26 can be introduced so that the deicing element 22 is correctly positioned and fixed to the module 1 from the front face. from either side. The drainage orifice 13 may further comprise another groove 30, or gutter, for the drainage of the condensates.
La partie plane 28 comme illustrée sur la figure 6 permet la fixation de l’élément de dégivrage 22 sur la paroi 4 de fond du boîtier 2. Pour cela, la partie plane 28 peut comprendre au moins un, ici deux, évidements 32 pour permettre à une vis de passer au travers de la partie plane et fixer ainsi l’élément de dégivrage 22 contre la paroi 4 de fond du boîtier 2. L’invention ne se limite pas au moyen de fixation de l’élément de dégivrage 22. Ainsi le module 1 de face avant, et plus particulièrement la partie plane 28 de l’élément de dégivrage 22, comprend un moyen de fixation 34 pour fixer l’élément de dégivrage 22 à la paroi 4 de fond du boitier 2. Ainsi, l’élément de dégivrage 22 peut être riveté (rivets passant au travers des évidements 32), bouterollé (bouterolles passant au travers des évidements 32), vissé (tiges filetées passant au travers des évidements 32), cloué (clous passant au travers des évidements 32). L’élément de dégivrage peut également être glué sur la paroi 4 de fond, les évidements 32 étant dans ce cas pas nécessaires. The flat part 28 as illustrated in FIG. 6 allows the defrosting element 22 to be fixed on the bottom wall 4 of the housing 2. For this, the flat part 28 can comprise at least one, here two, recesses 32 to allow with a screw to pass through the flat part and thus fix the defrosting element 22 against the bottom wall 4 of the housing 2. The invention is not limited to the means for fixing the defrosting element 22. Thus the front panel module 1, and more particularly the flat part 28 of the defrosting element 22, comprises a fixing means 34 for fixing the defrosting element 22 at the bottom wall 4 of the housing 2. Thus, the defrosting element 22 can be riveted (rivets passing through recesses 32), snap-fit (snaps passing through recesses 32), screwed ( threaded rods passing through recesses 32), nailed (nails passing through recesses 32). The defrosting element can also be glued onto the bottom wall 4, the recesses 32 being in this case not necessary.
En outre, la paroi 4 de fond du boitier 2 peut comprendre deux nervures 36, ou barrettes, faisant saillie du plan de la paroi 4 de fond, sensiblement parallèles l’une à l’autre, l’élément de dégivrage 22, plus particulièrement la partie plane 28, étant agencée entre les deux nervures 36. Ainsi, l’élément de dégivrage 22 est mieux positionné et maintenu au sein du module de face avant limitant ainsi les déplacements indésirables causées par les vibrations du véhicules. Les nervures 36 sont de préférence d’une épaisseur supérieure à l’épaisseur de l’élément de dégivrage 22. In addition, the bottom wall 4 of the housing 2 may comprise two ribs 36, or bars, projecting from the plane of the bottom wall 4, substantially parallel to each other, the deicing element 22, more particularly the flat part 28, being arranged between the two ribs 36. Thus, the deicing element 22 is better positioned and maintained within the front panel module, thus limiting undesirable movements caused by vehicle vibrations. The ribs 36 are preferably of a thickness greater than the thickness of the deicing element 22.
Comme illustré en figure 4, l’élément de dégivrage 22 s’étend en longueur dans la même direction que le faisceau de l’échangeur de chaleur 20, à savoir tout les deux dans la direction transversale (Y) du véhicule. As illustrated in FIG. 4, the deicing element 22 extends in length in the same direction as the bundle of the heat exchanger 20, namely both in the transverse direction (Y) of the vehicle.
Selon un mode de réalisation non illustré, l’élément de dégivrage 22 s’étend en longueur dans une direction orthogonale (X) à la direction dans laquelle s’étend le faisceau de l’échangeur de chaleur 20 (Y). Ceci peut être avantageux si l’orifice 13 de drainage est agencé en amont ou en aval de l’échangeur de chaleur 20 par rapport à l’écoulement du flux d’air. According to an embodiment not illustrated, the defrosting element 22 extends in length in a direction orthogonal (X) to the direction in which the bundle of the heat exchanger 20 (Y) extends. This can be advantageous if the drainage orifice 13 is arranged upstream or downstream of the heat exchanger 20 with respect to the flow of the air flow.
Selon un mode de réalisation non illustré, la paroi 4 de fond peut comprendre deux orifices 13 de drainage, l’élément de dégivrage 22 étant une pièce monobloc, il peut comprendre deux lames ressort reliées, deux parties planes et deux extrémités coudées chacune étant associée à un orifice de drainage. Il est aussi possible de concevoir un élément de dégivrage en forme d’Oméga (W), l’échangeur de chaleur venant en appui contre la partie en boucle. According to an embodiment not illustrated, the bottom wall 4 may comprise two drainage orifices 13, the deicing element 22 being a single piece, it can include two connected spring blades, two flat parts and two bent ends each being associated with a drainage orifice. It is also possible to design an Omega-shaped defrost element (W), the heat exchanger pressing against the looped part.
L’échangeur de chaleur 20 venant en appui contre l’élément de dégivrage 22 est préférentiellement le radiateur 1 du module de face avant. Un tel échangeur de chaleur véhicule un fluide caloporteur d’une température oscillant entre 50 et 90° en fonctionnement ce qui permet de dégivrer les condensats plus aisément. The heat exchanger 20 bearing against the defrost element 22 is preferably the radiator 1 of the front panel module. Such a heat exchanger conveys a heat transfer fluid with a temperature oscillating between 50 and 90 ° in operation which makes it possible to defrost the condensates more easily.

Claims

REVENDICATIONS
1. Module (1 ) de face avant pour véhicule automobile comprenant un boitier (2) avec une pluralité de parois (4) définissant ainsi un conduit d’écoulement pour un flux d’air, un orifice (13) de drainage étant agencé au sein d’une desdites parois (4), et au moins un échangeur de chaleur (20) étant agencé au sein du boitier (2), caractérisé en ce que le module (1 ) de face avant comprend un élément de dégivrage (22) apte à transmettre la chaleur générée par l’échangeur de chaleur (20) vers l’orifice (13) de drainage. 1. Front panel module (1) for a motor vehicle comprising a housing (2) with a plurality of walls (4) thus defining a flow duct for an air flow, a drainage orifice (13) being arranged at within one of said walls (4), and at least one heat exchanger (20) being arranged within the housing (2), characterized in that the module (1) on the front face comprises a defrosting element (22) able to transmit the heat generated by the heat exchanger (20) to the drainage orifice (13).
2. Module (1 ) selon la revendication 1 , dans lequel l’élément de dégivrage (22) est agencé au contact de l’échangeur de chaleur (20) et s’étend jusqu’à l’orifice (13) de drainage. 2. Module (1) according to claim 1, wherein the defrosting element (22) is arranged in contact with the heat exchanger (20) and extends to the orifice (13) for drainage.
3. Module (1 ) selon l’une des revendications précédentes, dans lequel ledit au moins un orifice (13) de drainage est disposé au point le plus bas de ladite paroi (4) du boitier (2) de sorte que les condensats puissent s’évacuer en dehors du boitier (2) par gravitation. 3. Module (1) according to one of the preceding claims, wherein said at least one drainage orifice (13) is disposed at the lowest point of said wall (4) of the housing (2) so that the condensates can evacuate outside the housing (2) by gravitation.
4. Module (1 ) selon l’une des revendications précédentes, dans lequel l’élément de dégivrage (22) comprend une lame ressort (24) destinée à être compressée entre la paroi (4) du boitier (2) où est agencé l’orifice (13) de drainage et une paroi de l’échangeur de chaleur (20). 4. Module (1) according to one of the preceding claims, wherein the defrosting element (22) comprises a leaf spring (24) intended to be compressed between the wall (4) of the housing (2) where is arranged l 'orifice (13) for drainage and a wall of the heat exchanger (20).
5. Module (1 ) selon l’une des revendications précédentes, dans lequel l’élément de dégivrage (22) comprend en outre une extrémité coudée (26) s’étendant au moins partiellement au sein de l’orifice (13) de drainage. 5. Module (1) according to one of the preceding claims, wherein the deicing element (22) further comprises a bent end (26) extending at least partially within the orifice (13) for drainage .
6. Module (1 ) selon la revendication 5 dépendante de la revendication 4, dans lequel l’élément de dégivrage (22) comprend une partie plane (28) agencée entre la lame ressort (24) et l’extrémité coudée (26), la partie plane (28) comprenant un moyen de fixation (32,34) pour fixer l’élément de dégivrage (22) à ladite paroi (4) du boîtier (2). 6. Module (1) according to claim 5 dependent on claim 4, wherein the defrosting element (22) comprises a flat part (28) arranged between the leaf spring (24) and the bent end (26), the flat part (28) comprising a fixing means (32, 34) for fixing the defrosting element (22) to said wall (4) of the housing (2).
7. Module (1 ) selon l’une des revendications précédentes, dans lequel l’élément de dégivrage (22) est réalisé dans un matériau métallique conducteur de chaleur. 7. Module (1) according to one of the preceding claims, wherein the defrosting element (22) is made of a heat-conductive metallic material.
8. Module (1 ) selon l’une des revendications précédentes, dans lequel ladite paroi (4) comprend au moins deux orifices (13) de drainage, l’élément de dégivrage (22) étant une pièce monobloc comprenant au moins une lame ressort (24) et deux extrémités coudées (26) chacune étant associée à un orifice (13) de drainage. 8. Module (1) according to one of the preceding claims, wherein said wall (4) comprises at least two orifices (13) for drainage, the defrosting element (22) being a single piece comprising at least one leaf spring (24) and two bent ends (26) each being associated with a drainage orifice (13).
9. Module (1 ) selon l’une des revendications précédentes, dans lequel deux nervures (36) sont agencées sur ladite paroi (4) du boîtier (2), l’élément de dégivrage (22) étant agencé au moins partiellement entre les deux nervures (36). 9. Module (1) according to one of the preceding claims, in which two ribs (36) are arranged on said wall (4) of the housing (2), the defrosting element (22) being arranged at least partially between the two ribs (36).
10. Véhicule automobile comprenant un module (1 ) de face avant selon l’une des revendications 1 à 9, caractérisé en ce que le véhicule comprend un conduit pour évacuer les condensats à l’extérieur du véhicule. 10. Motor vehicle comprising a front panel module (1) according to one of claims 1 to 9, characterized in that the vehicle comprises a conduit for discharging the condensates outside the vehicle.
PCT/FR2019/051922 2018-09-20 2019-08-14 Front-end module for a motor vehicle WO2020058585A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1858496 2018-09-20
FR1858496A FR3086218B1 (en) 2018-09-20 2018-09-20 FRONT PANEL MODULE FOR MOTOR VEHICLES

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WO2020058585A1 true WO2020058585A1 (en) 2020-03-26

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FR (1) FR3086218B1 (en)
WO (1) WO2020058585A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3128901A1 (en) * 2021-11-09 2023-05-12 Valeo Systemes Thermiques MOTOR VEHICLE COOLING MODULE WITH A DRAINAGE SYSTEM

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Publication number Priority date Publication date Assignee Title
JP2010149708A (en) * 2008-12-25 2010-07-08 Ud Trucks Corp Front underrun protector
JP2014198507A (en) * 2013-03-29 2014-10-23 マツダ株式会社 Vehicle grill shutter structure
JP2015206575A (en) * 2014-04-23 2015-11-19 三菱電機株式会社 Outdoor unit of air conditioner

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010149708A (en) * 2008-12-25 2010-07-08 Ud Trucks Corp Front underrun protector
JP2014198507A (en) * 2013-03-29 2014-10-23 マツダ株式会社 Vehicle grill shutter structure
JP2015206575A (en) * 2014-04-23 2015-11-19 三菱電機株式会社 Outdoor unit of air conditioner

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3128901A1 (en) * 2021-11-09 2023-05-12 Valeo Systemes Thermiques MOTOR VEHICLE COOLING MODULE WITH A DRAINAGE SYSTEM
WO2023083639A1 (en) * 2021-11-09 2023-05-19 Valeo Systemes Thermiques Cooling module for a motor vehicle, with a drainage system

Also Published As

Publication number Publication date
FR3086218A1 (en) 2020-03-27
FR3086218B1 (en) 2021-01-08

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