EP3247957A1 - Heat exchanger and thermal conditioning device for a motor vehicle comprising such an exchanger - Google Patents

Heat exchanger and thermal conditioning device for a motor vehicle comprising such an exchanger

Info

Publication number
EP3247957A1
EP3247957A1 EP16701019.8A EP16701019A EP3247957A1 EP 3247957 A1 EP3247957 A1 EP 3247957A1 EP 16701019 A EP16701019 A EP 16701019A EP 3247957 A1 EP3247957 A1 EP 3247957A1
Authority
EP
European Patent Office
Prior art keywords
exchanger
heating element
conditioning device
heat
tubes
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.)
Withdrawn
Application number
EP16701019.8A
Other languages
German (de)
French (fr)
Inventor
Josselin GOUR
Bernard Aoun
Laurent Tellier
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
Publication of EP3247957A1 publication Critical patent/EP3247957A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25DREFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D21/00Defrosting; Preventing frosting; Removing condensed or defrost water
    • F25D21/06Removing frost
    • F25D21/08Removing frost by electric heating
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B39/00Evaporators; Condensers
    • F25B39/02Evaporators
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28FDETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F19/00Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
    • F28F19/006Preventing deposits of ice
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00Ohmic-resistance heating
    • H05B3/20Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater
    • H05B3/22Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater non-flexible
    • H05B3/24Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater non-flexible heating conductor being self-supporting
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00Ohmic-resistance heating
    • H05B3/40Heating elements having the shape of rods or tubes
    • H05B3/42Heating elements having the shape of rods or tubes non-flexible
    • H05B3/44Heating elements having the shape of rods or tubes non-flexible heating conductor arranged within rods or tubes of insulating material
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28DHEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D1/00Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/04Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
    • F28D1/053Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being straight
    • F28D1/0535Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being straight the conduits having a non-circular cross-section
    • F28D1/05366Assemblies of conduits connected to common headers, e.g. core type radiators
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28FDETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F27/00Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2203/00Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/02Heaters using heating elements having a positive temperature coefficient
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2203/00Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/022Heaters specially adapted for heating gaseous material
    • H05B2203/023Heaters of the type used for electrically heating the air blown in a vehicle compartment by the vehicle heating system

Definitions

  • Heat exchanger and thermal conditioning device for a motor vehicle comprising such an exchanger
  • the present invention relates to a heat exchanger for a thermal conditioning device, in particular for the passenger compartment of a motor vehicle.
  • the invention finds its application more particularly in the context of electric or hybrid motor vehicles.
  • a conventional air conditioning loop which is capable of operating as a heat pump to heat the air of the passenger compartment from the calories extracted from the vehicle. outside air.
  • a loop comprises a heat exchanger at the front of the vehicle, a heat exchanger located in the passenger compartment, the circulation of the fluid in the loop being activated by a compressor.
  • the front heat exchanger operates as an evaporator and the passenger compartment heat exchanger as a condenser; in the cooling mode, the functions of the exchangers are reversed.
  • the object of the invention is to overcome these disadvantages by providing a solution avoiding any stoppage of operation of the heat pump and making it possible to minimize the modifications made to the air conditioning device as to the front heat exchanger, thus also minimizing the cost system design.
  • the subject of the invention is a heat exchanger adapted to operate as an evaporator in a thermal conditioning device traversed by a refrigerant fluid, the exchanger comprising at least one bundle in which the cooling fluid circulates, the exchanger comprising at least one heating element disposed in the vicinity of the beam and capable of heating the beam.
  • the beam provides a heat exchange between the fluid and an incident air flow
  • the heating element is used to heat the tubes of the evaporator and so defrost them.
  • the heating element comprises at least one electrical resistance
  • the electrical resistance is a thermistor with a positive temperature coefficient
  • the heating element comprises at least a plurality of resistors connected in parallel between two electrical connections, forming a bar,
  • the beam comprises tubes in which the coolant circulates
  • the beam comprises fins arranged between the tubes, in thermal contact with the latter,
  • At least one of the bars is carried by at least one of the fins, said exchanger comprises a plurality of bars carried by the fins,
  • the strips are arranged in the bundle so as to ensure a substantially uniform heating of the bundle
  • the strips extend substantially along a width of the bundle along said tubes, the strips are distributed between two front halves of said bundle, in alignment with each other and / or in staggered rows,
  • said strips occupy a front surface of less than 5%, or even 1%, of a frontal surface of the beam.
  • the invention also relates to a thermal conditioning device comprising a heat exchanger as described above, capable of operating as an evaporator.
  • said device comprises means for controlling the heating element, ensuring the commissioning of the heating element.
  • FIG. 6 an exemplary embodiment of PTC resistors mounted in strips
  • FIG. 1 represents a schematic diagram of a thermal conditioning device, in particular intended for a passenger compartment of a motor vehicle, using the exchanger according to the invention.
  • this device will be described in the context of its application to a motor vehicle.
  • the conditioning device mainly comprises a first heat exchanger 1, a second heat exchanger 7, a compressor 10 and a pressure reducer 4. These various elements are connected in a loop by pipes 5 to be traversed by a refrigerant fluid circulating in the pipes 5 .
  • the first exchanger 1 is disposed at the front of the vehicle, generally under the hood on the front of the vehicle, and is traversed by the refrigerant fluid.
  • the exchanger 1 is intended to maximize a heat exchange between the refrigerant and a flow of outside air 3 from the front of the vehicle, through its calender.
  • the device may comprise a fan 2, for example disengageable, operated when the air flow 3 becomes insufficient.
  • the second exchanger 7 is disposed in the passenger compartment of the vehicle, generally in a housing 6 called HVAC (for "Heating, Ventilation and Air Conditioning” or heating, ventilation and air conditioning in English), and is also traversed by the refrigerant. It is intended to maximize the heat exchange between the refrigerant and the air of the passenger compartment, which is shown entering the HVAC 6 by an arrow 8 and emerging by an arrow 9.
  • HVAC Heating, Ventilation and Air Conditioning
  • the preceding elements form a loop adapted to operate in conventional air conditioning loop: in this case, the fluid refrigerant travels the loop in the direction of the arrows 12; the passenger compartment exchanger 7 then operates as an evaporator, causing the evaporation of the refrigerant which subtracts calories from the air in the passenger compartment, thus cooling the latter.
  • the refrigerant fluid in the gaseous state is then compressed in a compressor 10 and then transmitted to the exchanger before 1.
  • the latter then operates as a condenser, causing the condensation of the fluid which gives calories to the outside air, before returning to the evaporator 7 via a pressure reducer 4.
  • the loop described above is also adapted for operation in a heat pump, operation in which the functions of the exchangers 1 and 7 are reversed, and the direction of travel of the loop (arrows 1 1): the exchanger before 1 operates in an evaporator to take calories from the outside air, calories that the fluid returns to the air of the passenger compartment through the exchanger 7 which then operates as a condenser. More specifically, the refrigerant fluid brought to the gaseous state by the front exchanger 1 is compressed by the compressor 10 before being condensed in the exchanger 7, then again expanded to return to the exchanger 1.
  • FIG. 1 is a schematic diagram: in general, in this kind of loop capable of having two distinct modes of operation, two different circuits are provided, the switching between the two modes being carried out by passing through one tubing circuit to the other by means of controlled valves (not shown).
  • FIG. 2 represents a partial front view of an embodiment of the exchanger according to the invention.
  • the exchanger 1 comprises a set of tubes 20, substantially parallel to each other and in which circulates the coolant.
  • the tubes 20 are for example substantially parallel to each other and mounted in parallel between two fluid collectors to which they are connected, only the right collector, referenced 21, being visible in FIG. 2.
  • the visible face in FIG. 2 is the front face, disposed on the side of the air inlet 3 (FIG. 1) and situated in a plane marked xO.sub.z of an orthonormal reference Oxyz.
  • the tubes 20 are, for example, flattened tubes along the xOy plane and extend in the Ox direction.
  • the collectors extend along the Oz axis.
  • the tubes 20 are each formed by two plates shaped to be joined together sealingly, to define an interior space where the coolant can circulate.
  • fins 22 also called spacers, each consisting for example of a thin strip, made of a good thermal conductive material and formed accordion.
  • the fins 22 are in thermal contact with the adjacent tubes 20 and their function is to increase the heat exchange between the outside air, propagating along the axis Oy, and the fluid flowing in the tubes 20.
  • the exchanger 1 further comprises at least one heating element 23 disposed in the vicinity of the beam and intended to heat the beam to melt the frost that can cover this beam.
  • the heating element 23 is formed by a set of electrical resistors, preferably thermistors with a positive temperature coefficient, or CTP, ie thermistors whose resistance increases with temperature.
  • Figure 6 shows, seen in partial section in the plane xOz, an embodiment of the heating element 23 by a PTC strip.
  • FIG. 6 is therefore a set of PTCs 60, for example in the form of blocks, arranged side by side and electrically connected, for example in parallel, by conducting strips 61 and 62 arranged on either side of the terminals. 60.
  • the assembly forms a bar, preferably covered with a material 63 electrically insulating.
  • the PTC strip 23 is disposed on the beam 26 itself. More specifically, it is carried by the fins 22 as illustrated in FIGS. 3, 4 and 5.
  • FIG. 3 represents a schematic view, in the xOz plane, of a fin 22 in which cuts have been made such that they can receive the CTP bar 23.
  • Figure 4 is the same diagram as that of Figure 3, but with the PTC bar 23 disposed in the fins.
  • FIG. 5 is a partial sectional view in the yOz plane of the beam 26 of FIG. 2, on which there are shown two tubes 20 enclosing a portion of a fin 22.
  • the fin 22 has the cutout 30 on that of its sides which is situated on the side of the incident external air 3.
  • the bar 23 is disposed in the cutout 30.
  • the fin 22 has a second cutout 31 on the opposite side to the preceding one, the cutout 31 receiving a second CTP bar 27.
  • This insertion mode of the PTC strip 23 in the fins 22 has the advantage of being easily adaptable to existing exchanger models, without requiring a review of the design of the exchanger.
  • FIG. 2 also shows control means 25 of the PTC strip 23, electrically connected to connections 24 of the strip 23, connections to which are connected for example the conductive strips 61 and 62 of FIG.
  • the control means 25 ensure the commissioning of the CTP 23 when it is necessary to defrost the beam 26. For this purpose, they receive on an input 28 or the parameters indicating that icing occurs.
  • the preceding parameters may be those (or derived from those) that trigger the operation of the fan 2 ( Figure 1) when it is controlled. It is possible, for example, to consider as parameters the propulsion engine temperature, the air conditioning requirements displayed, etc. It may also be the operating parameters of the loop of FIG. 1, in particular those which allow the passage of the mode. air conditioning in heat pump mode. They can also be reduced to means for measuring the air temperature in the vicinity of the exchanger 1.
  • FIGS 7, 8 and 9 are diagrams illustrating different possible locations of PTC strips in the beam of the exchanger.
  • the lines can be distributed in the following way: the first line (bars 71 and 72) at L / 6 of the upper edge, the second line (bars 73 and 74) to L / 3 of the previous line, and the third line (bars 75 and 76) to L / 3 of the previous line, and thus to L / 6 of the lower edge.
  • each line is formed by a single strip, respectively marked in the previous order, 81, 82 and 83.
  • FIG. 9 A third variant, allowing an even greater uniformization of the heating, is illustrated in FIG. 9: 6 CTP strips 91 - 96 are arranged no more in facing relation to form three lines as in FIG. 7, but in staggered rows. , or staircase.
  • the section in the plane xOz of the PTC array (s) 23 will advantageously be limited to about 5% of the total area of the beam 26, and preferably less than 1% of this area. total surface.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Air-Conditioning For Vehicles (AREA)

Abstract

A heat exchanger suitable for operating as an evaporator in a heat pump type thermal conditioning device, the exchanger (1) comprising a bundle (26) in which a coolant flows. The exchanger further comprises at least one heating element (23), disposed adjacent to the bundle (26) and suitable for heating same for de-icing purposes.

Description

Echangeur de chaleur et dispositif de conditionnement thermique pour véhicule automobile comportant un tel échangeur  Heat exchanger and thermal conditioning device for a motor vehicle comprising such an exchanger
DOMAINE TECHNIQUE DE L'INVENTION TECHNICAL FIELD OF THE INVENTION
La présente invention concerne un échangeur de chaleur pour un dispositif de conditionnement thermique, notamment destiné à l'habitacle d'un véhicule automobile. The present invention relates to a heat exchanger for a thermal conditioning device, in particular for the passenger compartment of a motor vehicle.
L'invention trouve son application plus particulièrement dans le cadre des véhicules automobiles électriques ou hybrides.  The invention finds its application more particularly in the context of electric or hybrid motor vehicles.
ARRIERE PLAN TECHNIQUE DE L'INVENTION BACKGROUND ART OF THE INVENTION
Actuellement, les constructeurs automobiles développent des véhicules qui fonctionnent à partir de nouvelles sources d'énergie, en complément ou en remplacement des moteurs thermiques. En particulier, il est proposé des véhicules dont la propulsion est réalisée à partir de l'énergie électrique en tout (véhicules électriques) ou en partie (véhicules dits hybrides). Currently, car manufacturers develop vehicles that operate from new sources of energy, in addition to or replacement of engines. In particular, it is proposed vehicles whose propulsion is carried out from the electrical energy in all (electric vehicles) or in part (so-called hybrid vehicles).
La capacité de stockage des batteries actuelles étant limitée, les équipements de tels véhicules doivent être adaptés pour limiter leur consommation électrique, qui s'effectue au détriment de l'autonomie du véhicule.  The storage capacity of current batteries being limited, the equipment of such vehicles must be adapted to limit their power consumption, which is done at the expense of the autonomy of the vehicle.
C'est ainsi qu'il est nécessaire d'assurer le confort thermique des passagers de l'habitacle du véhicule, et notamment d'assurer le chauffage de l'habitacle en l'absence d'un moteur thermique générateur de chaleur, sans que ce conditionnement thermique ne nuise à l'autonomie du véhicule de manière trop importante. Cela restreint notamment le recours à un radiateur électrique pour chauffer l'habitacle. It is thus necessary to ensure the thermal comfort of the passengers of the passenger compartment of the vehicle, and in particular to ensure the heating of the passenger compartment in the absence of a heat engine generating heat, without this thermal conditioning does not harm the autonomy of the vehicle too much. This restricts the use of an electric heater to heat the cabin.
Dans cet environnement, il est connu d'utiliser comme dispositif de conditionnement thermique de l'habitacle, une boucle de climatisation classique qui est capable de fonctionner en pompe à chaleur pour chauffer l'air de l'habitacle à partir des calories extraites de l'air extérieur. Une telle boucle comporte un échangeur de chaleur à l'avant du véhicule, un échangeur de chaleur situé dans l'habitacle, la circulation du fluide dans la boucle étant activée par un compresseur. Dans le mode pompe à chaleur, l'échangeur avant fonctionne en évaporateur et l'échangeur habitacle, en condenseur ; dans le mode climatisation, les fonctions des échangeurs sont inversées.  In this environment, it is known to use as a thermal conditioning device of the passenger compartment, a conventional air conditioning loop which is capable of operating as a heat pump to heat the air of the passenger compartment from the calories extracted from the vehicle. outside air. Such a loop comprises a heat exchanger at the front of the vehicle, a heat exchanger located in the passenger compartment, the circulation of the fluid in the loop being activated by a compressor. In the heat pump mode, the front heat exchanger operates as an evaporator and the passenger compartment heat exchanger as a condenser; in the cooling mode, the functions of the exchangers are reversed.
Toutefois, lorsque la température extérieure est basse (à partir de 3Ό) et quand l'hygrométrie de l'air est élevée, l'eau contenue dans l'air se condense sur l'échangeur de chaleur situé à l'avant du véhicule, qui fonctionne alors en évaporateur dans le mode pompe à chaleur, et se transforme en givre. L'accumulation de givre sur l'évaporateur obstrue le passage de l'air, dégrade l'échange thermique et s'accompagne d'une perte de puissance du dispositif de conditionnement. De plus, il existe un risque d'endommagement de ce dispositif, lié à une possible infiltration d'air dans le circuit, qui nécessite alors d'arrêter la pompe à chaleur et procéder au dégivrage de l'évaporateur.  However, when the outside temperature is low (from 3Ό) and when the hygrometry of the air is high, the water contained in the air condenses on the heat exchanger located at the front of the vehicle, which then operates as an evaporator in the heat pump mode, and turns into frost. Frost build-up on the evaporator obstructs the passage of air, degrades the heat exchange and is accompanied by a loss of power of the conditioning device. In addition, there is a risk of damage to this device, related to possible air infiltration into the circuit, which then requires to stop the heat pump and proceed to defrost the evaporator.
BREF RESUME DE L'INVENTION BRIEF SUMMARY OF THE INVENTION
L'invention a pour but de pallier ces inconvénients en procurant une solution évitant tout arrêt de fonctionnement de la pompe à chaleur et permettant de minimiser les modifications apportées au dispositif de conditionnement d'air comme à l'échangeur avant, minimisant ainsi également le coût de conception du système. A cet effet, l'invention a pour objet un échangeur de chaleur adapté pour fonctionner en évaporateur dans un dispositif de conditionnement thermique parcouru par un fluide réfrigérant, l'échangeur comportant au moins un faisceau dans lequel circule le fluide réfrigérant, l'échangeur comportant au moins un élément chauffant, disposé au voisinage du faisceau et apte à chauffer le faisceau. The object of the invention is to overcome these disadvantages by providing a solution avoiding any stoppage of operation of the heat pump and making it possible to minimize the modifications made to the air conditioning device as to the front heat exchanger, thus also minimizing the cost system design. For this purpose, the subject of the invention is a heat exchanger adapted to operate as an evaporator in a thermal conditioning device traversed by a refrigerant fluid, the exchanger comprising at least one bundle in which the cooling fluid circulates, the exchanger comprising at least one heating element disposed in the vicinity of the beam and capable of heating the beam.
Dans un mode de réalisation de l'invention, le faisceau assure un échange thermique entre le fluide et un flux d'air incident,  In one embodiment of the invention, the beam provides a heat exchange between the fluid and an incident air flow,
De la sorte, lorsque le dispositif de conditionnement d'air fonctionne en pompe à chaleur, et l'échangeur avant en évaporateur, et lorsque l'évaporateur se givre, l'élément chauffant permet de chauffer les tubes de l'évaporateur et ainsi de les dégivrer.  In this way, when the air conditioning device operates in a heat pump, and the front exchanger evaporator, and when the evaporator frost, the heating element is used to heat the tubes of the evaporator and so defrost them.
Selon différents modes de réalisation de l'invention, qui pourront être pris ensemble ou séparément :  According to various embodiments of the invention, which may be taken together or separately:
-l'élément chauffant comporte au moins une résistance électrique, the heating element comprises at least one electrical resistance,
- la résistance électrique est une thermistance à coefficient de température positif,  the electrical resistance is a thermistor with a positive temperature coefficient,
- l'élément chauffant comporte au moins une pluralité de résistances montées en parallèle entre deux connexions électriques, formant une barrette,  the heating element comprises at least a plurality of resistors connected in parallel between two electrical connections, forming a bar,
- le faisceau comporte des tubes dans lesquels circule le fluide réfrigérant, the beam comprises tubes in which the coolant circulates,
- le faisceau comporte des ailettes disposées entre les tubes, en contact thermique avec ces derniers, the beam comprises fins arranged between the tubes, in thermal contact with the latter,
- au moins l'une des barrettes est portée par au moins l'une des ailettes, - ledit échangeur comporte une pluralité de barrettes portées par les ailettes,  at least one of the bars is carried by at least one of the fins, said exchanger comprises a plurality of bars carried by the fins,
- les barrettes sont disposées dans le faisceau de sorte à assurer un chauffage sensiblement uniforme du faisceau,  the strips are arranged in the bundle so as to ensure a substantially uniform heating of the bundle,
- les barrettes s'étendent parallèlement aux tubes,  the bars extend parallel to the tubes,
- les barrettes s'étendent sensiblement selon une largeur du faisceau le long desdits tubes, - les barrettes sont réparties entre deux moitiés frontales dudit faisceau, dans l'alignement les unes des autres et/ou en quinconce, the strips extend substantially along a width of the bundle along said tubes, the strips are distributed between two front halves of said bundle, in alignment with each other and / or in staggered rows,
- lesdites barrettes occupent une surface frontale inférieure à 5%, voire 1 % d'une surface frontale du faisceau.  said strips occupy a front surface of less than 5%, or even 1%, of a frontal surface of the beam.
L'invention concerne également un dispositif de conditionnement thermique comportant un échangeur de chaleur tel que décrit plus haut, apte à fonctionner en évaporateur. Selon un aspect de l'invention, ledit dispositif comporte des moyens de commande de l'élément chauffant, assurant la mise en service de l'élément chauffant. The invention also relates to a thermal conditioning device comprising a heat exchanger as described above, capable of operating as an evaporator. According to one aspect of the invention, said device comprises means for controlling the heating element, ensuring the commissioning of the heating element.
BREVE DESCRIPTION DES FIGURES BRIEF DESCRIPTION OF THE FIGURES
D'autres caractéristiques et avantages de l'invention ressortiront de la description détaillée qui suit, donnée à titre indicatif et illustrée par les dessins annexés, qui représentent : Other features and advantages of the invention will emerge from the detailed description which follows, given for information only and illustrated by the appended drawings, which represent:
- la figure 1 , un schéma de principe d'un dispositif de conditionnement thermique utilisant l'échangeur selon l'invention ;  - Figure 1, a block diagram of a thermal conditioning device using the exchanger according to the invention;
- la figure 2, une vue de face partielle d'un mode de réalisation de l'échangeur selon l'invention ;  - Figure 2, a partial front view of an embodiment of the exchanger according to the invention;
- les figures 3, 4 et 5, des schémas explicatifs d'un mode de réalisation du montage d'éléments chauffants dans les ailettes de l'échangeur selon l'invention ;  - Figures 3, 4 and 5, explanatory diagrams of an embodiment of the mounting of heating elements in the fins of the exchanger according to the invention;
- la figure 6, un exemple de réalisation de résistances de type CTP montées en barrettes ;  FIG. 6, an exemplary embodiment of PTC resistors mounted in strips;
- les figures 7, 8 et 9, différentes variantes de montage d'éléments chauffants dans l'échangeur selon l'invention. DESCRIPTION DETAILLEE DES FIGURES - Figures 7, 8 and 9, different mounting variants of heating elements in the exchanger according to the invention. DETAILED DESCRIPTION OF THE FIGURES
Dans la suite de la description, des éléments présentant une structure identique ou des fonctions analogues sont désignés par les mêmes références. In the remainder of the description, elements having an identical structure or similar functions are designated by the same references.
La figure 1 représente un schéma de principe d'un dispositif de conditionnement thermique, notamment destiné à un habitacle de véhicule automobile, utilisant l'échangeur selon l'invention.  FIG. 1 represents a schematic diagram of a thermal conditioning device, in particular intended for a passenger compartment of a motor vehicle, using the exchanger according to the invention.
Pour simplifier, ce dispositif sera décrit dans le cadre de son application à un véhicule automobile.  For simplicity, this device will be described in the context of its application to a motor vehicle.
Le dispositif de conditionnement comporte principalement un premier échangeur thermique 1 , un deuxième échangeur thermique 7, un compresseur 10 et un détendeur 4. Ces différents éléments sont connectés en boucle par des tubulures 5 pour être parcourus par un fluide réfrigérant, circulant dans les tubulures 5.  The conditioning device mainly comprises a first heat exchanger 1, a second heat exchanger 7, a compressor 10 and a pressure reducer 4. These various elements are connected in a loop by pipes 5 to be traversed by a refrigerant fluid circulating in the pipes 5 .
Le premier échangeur 1 est disposé à l'avant du véhicule, en général sous le capot en face avant du véhicule, et il est traversé par le fluide réfrigérant. L'échangeur 1 est destiné à maximiser un échange thermique entre le fluide réfrigérant et un flux d'air extérieur 3 provenant de l'avant du véhicule, à travers sa calendre. Pour augmenter le flux d'air, le dispositif peut comporter un ventilateur 2, par exemple débrayable, mis en fonctionnement lorsque le débit d'air 3 devient insuffisant.  The first exchanger 1 is disposed at the front of the vehicle, generally under the hood on the front of the vehicle, and is traversed by the refrigerant fluid. The exchanger 1 is intended to maximize a heat exchange between the refrigerant and a flow of outside air 3 from the front of the vehicle, through its calender. To increase the flow of air, the device may comprise a fan 2, for example disengageable, operated when the air flow 3 becomes insufficient.
Le deuxième échangeur 7 est disposé dans l'habitacle du véhicule, en général dans un boîtier 6 appelé HVAC (pour « Heating, Ventilation and Air Conditioning » ou chauffage, ventilation et climatisation en anglais), et est également traversé par le fluide réfrigérant. Il est destiné à maximiser l'échange thermique entre le fluide réfrigérant et l'air de l'habitacle, qu'on a représenté entrant dans l'HVAC 6 par une flèche 8 et en ressortant par une flèche 9.  The second exchanger 7 is disposed in the passenger compartment of the vehicle, generally in a housing 6 called HVAC (for "Heating, Ventilation and Air Conditioning" or heating, ventilation and air conditioning in English), and is also traversed by the refrigerant. It is intended to maximize the heat exchange between the refrigerant and the air of the passenger compartment, which is shown entering the HVAC 6 by an arrow 8 and emerging by an arrow 9.
Les éléments précédents forment une boucle adaptée pour fonctionner en boucle de climatisation classique : dans ce cas, le fluide réfrigérant parcourt la boucle dans le sens des flèches 12 ; l'échangeur habitacle 7 fonctionne alors en évaporateur, entraînant l'évaporation du fluide réfrigérant qui soustrait des calories à l'air de l'habitacle, refroidissant ainsi ce dernier. Le fluide réfrigérant à l'état gazeux est ensuite comprimé dans un compresseur 10 puis transmis à l'échangeur avant 1 . Ce dernier fonctionne alors en condenseur, entraînant la condensation du fluide qui donne des calories à l'air extérieur, avant retour à l'évaporateur 7 via un détendeur 4. The preceding elements form a loop adapted to operate in conventional air conditioning loop: in this case, the fluid refrigerant travels the loop in the direction of the arrows 12; the passenger compartment exchanger 7 then operates as an evaporator, causing the evaporation of the refrigerant which subtracts calories from the air in the passenger compartment, thus cooling the latter. The refrigerant fluid in the gaseous state is then compressed in a compressor 10 and then transmitted to the exchanger before 1. The latter then operates as a condenser, causing the condensation of the fluid which gives calories to the outside air, before returning to the evaporator 7 via a pressure reducer 4.
La boucle décrite ci-dessus est également adaptée pour un fonctionnement en pompe à chaleur, fonctionnement dans lequel les fonctions des échangeurs 1 et 7 sont inversées, ainsi que le sens de parcours de la boucle (flèches 1 1 ) : l'échangeur avant 1 fonctionne en évaporateur pour prélever des calories à l'air extérieur, calories que le fluide restitue à l'air de l'habitacle par l'intermédiaire de l'échangeur 7 qui fonctionne alors en condenseur. Plus précisément, le fluide réfrigérant porté à l'état gazeux par l'échangeur avant 1 est comprimé par le compresseur 10 avant d'être condensé dans l'échangeur 7, puis à nouveau détendu pour retourner dans l'échangeur 1 .  The loop described above is also adapted for operation in a heat pump, operation in which the functions of the exchangers 1 and 7 are reversed, and the direction of travel of the loop (arrows 1 1): the exchanger before 1 operates in an evaporator to take calories from the outside air, calories that the fluid returns to the air of the passenger compartment through the exchanger 7 which then operates as a condenser. More specifically, the refrigerant fluid brought to the gaseous state by the front exchanger 1 is compressed by the compressor 10 before being condensed in the exchanger 7, then again expanded to return to the exchanger 1.
Le schéma de la figure 1 est un schéma de principe : en général, dans ce genre de boucle susceptible d'avoir deux modes de fonctionnement distincts, il est prévu deux circuits différents, la commutation entre les deux modes s'effectuant par passage d'un circuit de tubulures à l'autre au moyen de vannes commandées (non représentées).  The diagram of FIG. 1 is a schematic diagram: in general, in this kind of loop capable of having two distinct modes of operation, two different circuits are provided, the switching between the two modes being carried out by passing through one tubing circuit to the other by means of controlled valves (not shown).
Comme indiqué plus haut, lorsque la boucle fonctionne en pompe à chaleur et l'échangeur avant 1 en évaporateur, ce dernier se recouvre de givre lorsque la température de l'air extérieur 3 est basse et son hygrométrie est élevée, dégradant l'échange thermique air-fluide réfrigérant et par suite l'efficacité du dispositif de conditionnement thermique. La figure 2 représente une vue de face partielle d'un mode de réalisation de l'échangeur selon l'invention. As indicated above, when the loop operates in heat pump and the front exchanger 1 evaporator, the latter is covered with frost when the outside air temperature 3 is low and its hygrometry is high, degrading the heat exchange air-refrigerant fluid and consequently the effectiveness of the thermal conditioning device. FIG. 2 represents a partial front view of an embodiment of the exchanger according to the invention.
Dans ce mode de réalisation, l'échangeur 1 comporte un ensemble de tubes 20, sensiblement parallèles entre eux et dans lesquels circule le fluide réfrigérant. Les tubes 20 sont par exemple sensiblement parallèles entre eux et montés en parallèle entre deux collecteurs de fluide auxquels ils sont reliés, seul le collecteur de droite, référencé 21 , étant visible sur la figure 2.  In this embodiment, the exchanger 1 comprises a set of tubes 20, substantially parallel to each other and in which circulates the coolant. The tubes 20 are for example substantially parallel to each other and mounted in parallel between two fluid collectors to which they are connected, only the right collector, referenced 21, being visible in FIG. 2.
La face visible sur la figure 2 est la face avant, disposée du côté de l'arrivée d'air 3 (figure 1 ) et située dans un plan repéré xOz d'un repère orthonormé Oxyz. Les tubes 20 sont par exemple des tubes aplatis selon le plan xOy et s'étendent dans la direction Ox. Les collecteurs s'étendent selon l'axe Oz.  The visible face in FIG. 2 is the front face, disposed on the side of the air inlet 3 (FIG. 1) and situated in a plane marked xO.sub.z of an orthonormal reference Oxyz. The tubes 20 are, for example, flattened tubes along the xOy plane and extend in the Ox direction. The collectors extend along the Oz axis.
Dans une variante de réalisation, les tubes 20 sont formés chacun par deux plaques conformées pour être réunies entre elles de façon étanche, pour définir un espace intérieur où le fluide réfrigérant peut circuler.  In an alternative embodiment, the tubes 20 are each formed by two plates shaped to be joined together sealingly, to define an interior space where the coolant can circulate.
Entre les tubes 20 sont placées des ailettes 22, aussi appelées intercalaires, constituées chacune par exemple d'une bande mince, réalisée en un matériau bon conducteur thermique et formée en accordéon. Les ailettes 22 sont en contact thermique avec les tubes 20 adjacents et ont pour fonction d'augmenter l'échange thermique entre l'air extérieur, se propageant selon l'axe Oy, et le fluide circulant dans les tubes 20.  Between the tubes 20 are placed fins 22, also called spacers, each consisting for example of a thin strip, made of a good thermal conductive material and formed accordion. The fins 22 are in thermal contact with the adjacent tubes 20 and their function is to increase the heat exchange between the outside air, propagating along the axis Oy, and the fluid flowing in the tubes 20.
L'ensemble tubes 20 et ailettes 22 forment ce qu'on appelle le faisceau de l'échangeur, repéré 26, responsable de l'échange thermique entre l'air et le fluide réfrigérant.  The tubes 20 and fins 22 together form what is called the exchanger beam, marked 26, responsible for the heat exchange between the air and the refrigerant.
Selon l'invention, l'échangeur 1 comporte en outre au moins un élément chauffant 23, disposé au voisinage du faisceau et destiné à chauffer le faisceau pour faire fondre le givre qui peut recouvrir ce faisceau. Avantageusement, l'élément chauffant 23 est formé par un ensemble de résistances électriques, de préférence des thermistances à coefficient de température positif, ou CTP, c'est à dire des thermistances dont la résistance augmente avec la température. According to the invention, the exchanger 1 further comprises at least one heating element 23 disposed in the vicinity of the beam and intended to heat the beam to melt the frost that can cover this beam. Advantageously, the heating element 23 is formed by a set of electrical resistors, preferably thermistors with a positive temperature coefficient, or CTP, ie thermistors whose resistance increases with temperature.
La figure 6 représente, vu en coupe partielle dans le plan xOz, un mode de réalisation de l'élément chauffant 23 par une barrette de CTP.  Figure 6 shows, seen in partial section in the plane xOz, an embodiment of the heating element 23 by a PTC strip.
Sur la figure 6 est donc représenté un ensemble de CTP 60, se présentant par exemple sous la forme de pavés, disposés côte à côte et reliés électriquement par exemple en parallèle par des bandes conductrices 61 et 62, disposées de part et d'autre des pavés 60. L'ensemble forme une barrette, de préférence recouverte d'un matériau 63 isolant électriquement.  FIG. 6 is therefore a set of PTCs 60, for example in the form of blocks, arranged side by side and electrically connected, for example in parallel, by conducting strips 61 and 62 arranged on either side of the terminals. 60. The assembly forms a bar, preferably covered with a material 63 electrically insulating.
Dans le mode de réalisation de la figure 2, la barrette de CTP 23 est disposée sur le faisceau 26 lui-même. Plus précisément, elle est portée par les ailettes 22 comme illustré sur les figures 3, 4 et 5.  In the embodiment of Figure 2, the PTC strip 23 is disposed on the beam 26 itself. More specifically, it is carried by the fins 22 as illustrated in FIGS. 3, 4 and 5.
La figure 3 représente une vue schématique, dans le plan xOz, d'une ailette 22 dans laquelle on a réalisé des découpes 30 telles qu'elles puissent recevoir la barrette de CTP 23.  FIG. 3 represents a schematic view, in the xOz plane, of a fin 22 in which cuts have been made such that they can receive the CTP bar 23.
La figure 4 est le même schéma que celui de la figure 3, mais avec la barrette de CTP 23 disposée dans les ailettes.  Figure 4 is the same diagram as that of Figure 3, but with the PTC bar 23 disposed in the fins.
La figure 5 est une vue en coupe partielle dans le plan yOz du faisceau 26 de la figure 2, sur laquelle on a représenté deux tubes 20 enserrant une partie d'une ailette 22.  FIG. 5 is a partial sectional view in the yOz plane of the beam 26 of FIG. 2, on which there are shown two tubes 20 enclosing a portion of a fin 22.
L'ailette 22 présente la découpe 30 sur celui de ses côtés qui est située du côté de l'air extérieur incident 3. La barrette 23 est disposée dans la découpe 30.  The fin 22 has the cutout 30 on that of its sides which is situated on the side of the incident external air 3. The bar 23 is disposed in the cutout 30.
Dans une variante de réalisation qui est représentée sur la figure 5, l'ailette 22 présente une seconde découpe 31 sur le côté opposé au précédent, la découpe 31 recevant une seconde barrette de CTP 27. Ce mode d'insertion de la barrette de CTP 23 dans les ailettes 22 présente l'avantage d'être aisément adaptable à des modèles d'échangeurs existants, sans obliger à revoir la conception de l'échangeur. In an alternative embodiment which is shown in FIG. 5, the fin 22 has a second cutout 31 on the opposite side to the preceding one, the cutout 31 receiving a second CTP bar 27. This insertion mode of the PTC strip 23 in the fins 22 has the advantage of being easily adaptable to existing exchanger models, without requiring a review of the design of the exchanger.
Sur la figure 2, on a représenté également des moyens de commande 25 de la barrette de CTP 23, connectés électriquement à des connexions 24 de la barrette 23, connexions auxquelles sont reliées par exemple les bandes conductrices 61 et 62 de la figure 6.  FIG. 2 also shows control means 25 of the PTC strip 23, electrically connected to connections 24 of the strip 23, connections to which are connected for example the conductive strips 61 and 62 of FIG.
Les moyens de commande 25 assurent la mise en service des CTP 23 lorsqu'il est nécessaire de procéder au dégivrage du faisceau 26. A cet effet, ils reçoivent sur une entrée 28 le ou les paramètres indiquant qu'un givrage se produit. Les paramètres précédents peuvent être ceux (ou dérivés de ceux) qui déclenchent le fonctionnement du ventilateur 2 (figure 1 ) lorsque celui-ci est piloté. On peut, par exemple, considérer comme paramètres la température du moteur de propulsion, les besoins de climatisation affichés, .... Ce peut être également les paramètres de fonctionnement de la boucle de la figure 1 , notamment ceux qui permettent le passage du mode climatisation au mode pompe à chaleur. Ils peuvent encore se réduire à des moyens de mesure de la température de l'air au voisinage de l'échangeur 1 .  The control means 25 ensure the commissioning of the CTP 23 when it is necessary to defrost the beam 26. For this purpose, they receive on an input 28 or the parameters indicating that icing occurs. The preceding parameters may be those (or derived from those) that trigger the operation of the fan 2 (Figure 1) when it is controlled. It is possible, for example, to consider as parameters the propulsion engine temperature, the air conditioning requirements displayed, etc. It may also be the operating parameters of the loop of FIG. 1, in particular those which allow the passage of the mode. air conditioning in heat pump mode. They can also be reduced to means for measuring the air temperature in the vicinity of the exchanger 1.
Les figures 7, 8 et 9 sont des schémas illustrant différentes implantations possibles de barrettes de CTP dans le faisceau de l'échangeur.  Figures 7, 8 and 9 are diagrams illustrating different possible locations of PTC strips in the beam of the exchanger.
Afin de dégivrer au mieux l'ensemble de l'échangeur de chaleur, il est avantageux de le chauffer de la façon la plus uniforme possible et, pour cela, d'utiliser une pluralité de barrettes de CTP telles que 23.  In order to best defrost the entire heat exchanger, it is advantageous to heat it as uniformly as possible and, for this purpose, to use a plurality of PTC strips such as 23.
Dans une première variante représentée sur la figure 7, 6 barrettes 23 sont disposées dans le faisceau 26, vu dans le plan xOz, formant 3 lignes parallèles à l'axe Ox, chaque ligne étant formée par deux barrettes. De plus, si L est la dimension du faisceau selon l'axe Oz, les lignes peuvent être distribuées de la façon suivante : la première ligne (barrettes 71 et 72) à L/6 du bord supérieur, la deuxième ligne (barrettes 73 et 74) à L/3 de la ligne précédente, et la troisième ligne (barrettes 75 et 76) à L/3 de la ligne précédente, et donc à L/6 du bord inférieur. In a first variant shown in FIG. 7, six bars 23 are arranged in the beam 26, seen in the plane xOz, forming 3 lines parallel to the axis Ox, each line being formed by two bars. Moreover, if L is the size of the beam along the axis Oz, the lines can be distributed in the following way: the first line (bars 71 and 72) at L / 6 of the upper edge, the second line (bars 73 and 74) to L / 3 of the previous line, and the third line (bars 75 and 76) to L / 3 of the previous line, and thus to L / 6 of the lower edge.
Dans une deuxième variante représentée sur la figure 8, on retrouve une disposition en trois lignes comme sur la figure 7, mais ici chaque ligne est formée par une barrette unique, repérées respectivement dans l'ordre précédent, 81 , 82 et 83.  In a second variant shown in FIG. 8, there is a layout in three lines as in FIG. 7, but here each line is formed by a single strip, respectively marked in the previous order, 81, 82 and 83.
Une troisième variante, permettant une uniformisation du chauffage encore plus grande, est illustrée sur la figure 9 : 6 barrettes de CTP 91 - 96 sont disposées non plus en vis-à-vis pour former trois lignes comme dans la figure 7, mais en quinconce, ou escalier.  A third variant, allowing an even greater uniformization of the heating, is illustrated in FIG. 9: 6 CTP strips 91 - 96 are arranged no more in facing relation to form three lines as in FIG. 7, but in staggered rows. , or staircase.
Dans l'un ou l'autre des modes de réalisation, la section dans le plan xOz de la ou des barrettes CTP 23 sera avantageusement limitée à environ 5% de la surface totale du faisceau 26, et de préférence inférieure à 1 % de cette surface totale.  In either embodiment, the section in the plane xOz of the PTC array (s) 23 will advantageously be limited to about 5% of the total area of the beam 26, and preferably less than 1% of this area. total surface.

Claims

REVENDICATIONS
1 . Echangeur de chaleur (1 ) adapté pour fonctionner en évaporateur dans un dispositif de conditionnement thermique parcouru par un fluide réfrigérant, l'échangeur comportant au moins un faisceau (26) dans lequel circule le fluide réfrigérant, 1. Heat exchanger (1) adapted to operate as an evaporator in a thermal conditioning device traversed by a refrigerant, the exchanger comprising at least one bundle (26) in which the refrigerant circulates,
l'échangeur étant caractérisé par le fait qu'il comporte au moins un élément chauffant (23), disposé au voisinage du faisceau (26) et apte à chauffer le faisceau. the exchanger being characterized in that it comprises at least one heating element (23) disposed in the vicinity of the beam (26) and adapted to heat the beam.
2. Echangeur selon la revendication 1 , caractérisé par le fait que l'élément chauffant (23) comporte au moins une résistance électrique (60). 2. Exchanger according to claim 1, characterized in that the heating element (23) comprises at least one electrical resistance (60).
3. Echangeur selon la revendication 2, caractérisé par le fait que la résistance électrique (60) est une thermistance à coefficient de température positif. 3. Exchanger according to claim 2, characterized in that the electrical resistance (60) is a thermistor with a positive temperature coefficient.
4. Echangeur selon l'une des revendications 2 ou 3, caractérisé par le fait que l'élément chauffant (23) comporte au moins une pluralité des résistances (60) montées en parallèle entre deux connexions électriques (61 , 62), formant une barrette. 4. Exchanger according to one of claims 2 or 3, characterized in that the heating element (23) comprises at least a plurality of resistors (60) connected in parallel between two electrical connections (61, 62), forming a bar.
5. Echangeur selon l'une des revendications précédentes, caractérisé par le fait que le faisceau (26) comporte des tubes (20) dans lesquels circule le fluide réfrigérant, et des ailettes (22) disposées entre les tubes (20), en contact thermique avec lesdits tubes (20). 5. Exchanger according to one of the preceding claims, characterized in that the beam (26) comprises tubes (20) in which the coolant circulates, and fins (22) arranged between the tubes (20), in contact with said tubes (20).
6. Echangeur selon la revendication 5, caractérisé par le fait qu'au moins l'une des barrettes (23) est portée par au moins l'une des ailettes (22). 6. Exchanger according to claim 5, characterized in that at least one of the webs (23) is carried by at least one of the fins (22).
7. Echangeur selon la revendication 6, caractérisé par le fait qu'il comporte une pluralité de barrettes portées par les ailettes (22). 7. Exchanger according to claim 6, characterized in that it comprises a plurality of bars carried by the fins (22).
8. Echangeur selon la revendication 7, caractérisé par le fait que les barrettes sont disposées dans le faisceau (23) de sorte à assurer un chauffage sensiblement uniforme du faisceau. 8. Exchanger according to claim 7, characterized in that the bars are arranged in the beam (23) so as to provide a substantially uniform heating of the beam.
9. Dispositif de conditionnement thermique, caractérisé par le fait qu'il comporte un échangeur de chaleur (1 ) selon l'une des revendications précédentes, apte à fonctionner en évaporateur. 9. Thermal conditioning device, characterized in that it comprises a heat exchanger (1) according to one of the preceding claims, operable as an evaporator.
10. Dispositif selon la revendication 9, caractérisé par le fait qu'il comporte des moyens de commande (25) de l'élément chauffant (23), assurant la mise en service de l'élément chauffant. 10. Device according to claim 9, characterized in that it comprises control means (25) of the heating element (23), ensuring the commissioning of the heating element.
EP16701019.8A 2015-01-21 2016-01-19 Heat exchanger and thermal conditioning device for a motor vehicle comprising such an exchanger Withdrawn EP3247957A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1550464A FR3031803B1 (en) 2015-01-21 2015-01-21 HEAT EXCHANGER AND THERMAL CONDITIONING DEVICE FOR A MOTOR VEHICLE COMPRISING SUCH AN EXCHANGER
PCT/EP2016/051039 WO2016116462A1 (en) 2015-01-21 2016-01-19 Heat exchanger and thermal conditioning device for a motor vehicle comprising such an exchanger

Publications (1)

Publication Number Publication Date
EP3247957A1 true EP3247957A1 (en) 2017-11-29

Family

ID=53269633

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16701019.8A Withdrawn EP3247957A1 (en) 2015-01-21 2016-01-19 Heat exchanger and thermal conditioning device for a motor vehicle comprising such an exchanger

Country Status (4)

Country Link
EP (1) EP3247957A1 (en)
JP (1) JP2018503794A (en)
FR (1) FR3031803B1 (en)
WO (1) WO2016116462A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112944594B (en) * 2021-01-29 2023-04-14 青岛海尔空调器有限总公司 Method and device for defrosting control of air conditioner and air conditioner

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4432211A (en) * 1980-11-17 1984-02-21 Hitachi, Ltd. Defrosting apparatus
JPS5918365A (en) * 1982-07-21 1984-01-30 株式会社日立製作所 Defrosting controller
JPH0253628A (en) * 1988-08-17 1990-02-22 Texas Instr Japan Ltd Air heating device
JPH06281201A (en) * 1993-03-26 1994-10-07 Sharp Corp Air conditioner
JPH07205646A (en) * 1994-01-26 1995-08-08 Mitsubishi Heavy Ind Ltd Heat pump type air conditioner for vehicle
WO2005052474A2 (en) * 2003-11-28 2005-06-09 Lg Electronics Inc. Defroster for evaporator in refrigerator
ITVE20050033U1 (en) * 2005-10-20 2007-04-21 I R C A S P A Ind Resistenze SHEET EVAPORATOR FOR REFRIGERANT SYSTEMS PROVIDED WITH A DEVICE FOR DEFROSTING.
KR101225977B1 (en) * 2007-06-14 2013-01-24 엘지전자 주식회사 Air conditioner and Control method of the same
JP5447842B2 (en) * 2009-03-23 2014-03-19 日本軽金属株式会社 Corrugated fin heat exchanger drainage structure
US20100249498A1 (en) * 2009-03-24 2010-09-30 Tyco Healthcare Group Lp Endoscopic Apparatus for Manipulating Tissue
DE102011087029A1 (en) * 2011-11-24 2013-05-29 BSH Bosch und Siemens Hausgeräte GmbH Evaporator for a refrigeration device and refrigeration device
JP2013208938A (en) * 2012-03-30 2013-10-10 Mitsubishi Heavy Ind Ltd Frost formation prevention device of vehicle exterior heat exchanger, and vehicular air conditioner

Also Published As

Publication number Publication date
JP2018503794A (en) 2018-02-08
WO2016116462A1 (en) 2016-07-28
FR3031803A1 (en) 2016-07-22
FR3031803B1 (en) 2018-08-10

Similar Documents

Publication Publication Date Title
EP2791596B1 (en) Device for air conditioning a drive train and a passenger compartment of a vehicle
EP3080523B1 (en) Electrical device for the thermal conditioning of fluid for a motor vehicle, and associated heating and/or air-conditioning appliance
EP2831514B1 (en) Electrical heating device for a motor vehicle, and associated heating, ventilation and/or air conditioning apparatus
EP2516937B1 (en) Electric heating device and corresponding heating appliance
EP2819863B1 (en) Electric fluid heating device for a vehicle and corresponding heating and/or cooling device
FR2943775A1 (en) STORAGE EXCHANGER WITH STORER MATERIAL AND AIR CONDITIONING LOOP OR COOLING CIRCUIT COMPRISING SUCH AN EXCHANGER.
EP2901088B1 (en) Device for thermally conditioning fluid for a motor vehicle and corresponding heating and/or air conditioning apparatus
WO2012019952A1 (en) Heat exchanger comprising a screen-printed heating element
FR2963408A1 (en) AIR CONDITIONING SYSTEM, IN PARTICULAR A MOTOR VEHICLE, COMPRISING A CLIMATE LOOP AND A SECONDARY LOOP COOPERATING WITH THE AIR CONDITIONING LOOP
EP3017653A1 (en) Fluid heating device for a motor vehicle and corresponding heating and/or air-conditioning apparatus
WO2015086969A1 (en) Heating, ventilation and air-conditioning system for a hybrid vehicle
WO2016116462A1 (en) Heat exchanger and thermal conditioning device for a motor vehicle comprising such an exchanger
FR3073609B1 (en) CHANNEL FOR THERMAL EXCHANGER OF A MOTOR VEHICLE
FR3027849A1 (en) ARCHITECTURE OF A HEAT PUMP
EP0876080A1 (en) Heating device having resistive elements with a positive temperature coefficient (PTC)
FR2878316A1 (en) Electrical heating device for use in e.g. private vehicle, has case with zone traversed by air flow produced by propeller and comprising cells for receiving multiple heating units, multiple electronic interrupters and control circuit
WO2015000735A1 (en) Thermal fluid conditioning device for a motor vehicle and corresponding heating, ventilation and/or air-conditioning facility
WO2022268581A1 (en) Device for thermal regulation of at least one electrical and/or electronic component
FR2995670A3 (en) Heat exchanger for exchanging heat between functional fluid of e.g. electrically driven car and air, has distribution elements directing cooling liquid and refrigerant fluid towards collecting elements and crossed by air flows, respectively
EP4412846A1 (en) Electric heating device and corresponding heating, ventilation and/or air-conditioning installation
FR3075334A1 (en) HEAT EXCHANGER FOR A VEHICLE HAVING AN ELECTRICALLY HEATING DISSIPATION DEVICE
FR2993507A1 (en) Electric heating device for heating coolant in ventilation, heating and/or air-conditioning apparatus of car, has compensating element made flexible under effect of pressure of coolant such that fluid circulation space is increased
FR3077334A1 (en) VENTILATION DEVICE FOR MOTOR VEHICLE
EP3732379A1 (en) Ventilation device for a motor vehicle
FR2993966A1 (en) ASSEMBLY OF A HEAT EXCHANGE MODULE AND AT LEAST ONE ELECTRICAL MEMBER.

Legal Events

Date Code Title Description
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE

PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20170706

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

DAV Request for validation of the european patent (deleted)
DAX Request for extension of the european patent (deleted)
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

17Q First examination report despatched

Effective date: 20201215

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20220104