EP3766303A1 - Heating device, particularly for air conditioning housing of a motor vehicle - Google Patents

Heating device, particularly for air conditioning housing of a motor vehicle

Info

Publication number
EP3766303A1
EP3766303A1 EP18808432.1A EP18808432A EP3766303A1 EP 3766303 A1 EP3766303 A1 EP 3766303A1 EP 18808432 A EP18808432 A EP 18808432A EP 3766303 A1 EP3766303 A1 EP 3766303A1
Authority
EP
European Patent Office
Prior art keywords
heating
zone
elements
bar
heating elements
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Withdrawn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
EP18808432.1A
Other languages
German (de)
French (fr)
Inventor
Frédéric PIERRON
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 EP3766303A1 publication Critical patent/EP3766303A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/22—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant
    • B60H1/2215—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant the heat being derived from electric heaters
    • B60H1/2225—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant the heat being derived from electric heaters arrangements of electric heaters for heating air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H3/00—Air heaters
    • F24H3/02—Air heaters with forced circulation
    • F24H3/04—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element
    • F24H3/0405—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element using electric energy supply, e.g. the heating medium being a resistive element; Heating by direct contact, i.e. with resistive elements, electrodes and fins being bonded together without additional element in-between
    • F24H3/0429—For vehicles
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/20—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater
    • H05B3/22—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater non-flexible
    • H05B3/24—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater non-flexible heating conductor being self-supporting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/22—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant
    • B60H1/2215—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant the heat being derived from electric heaters
    • B60H1/2218—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant the heat being derived from electric heaters controlling the operation of electric heaters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/00007—Combined heating, ventilating, or cooling devices
    • B60H1/00021—Air flow details of HVAC devices
    • B60H2001/00185—Distribution of conditionned air
    • B60H2001/00192—Distribution of conditionned air to left and right part of passenger compartment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/22—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant
    • B60H2001/2268—Constructional features
    • B60H2001/2278—Connectors, water supply, housing, mounting brackets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/22—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant
    • B60H2001/2268—Constructional features
    • B60H2001/2287—Integration into a vehicle HVAC system or vehicle dashboard
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H2250/00—Electrical heat generating means
    • F24H2250/04—Positive or negative temperature coefficients, e.g. PTC, NTC
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/022—Heaters specially adapted for heating gaseous material
    • H05B2203/023—Heaters of the type used for electrically heating the air blown in a vehicle compartment by the vehicle heating system

Definitions

  • the present invention relates to a heating device, especially for air conditioning housing of a vehicle.
  • Electric heating devices are known to be integrated in vehicle air conditioning units. These are either additional radiators, combined with heating radiators covered by a heat transfer fluid, in vehicles with a combustion engine or main radiators, in electric or hybrid vehicles.
  • Such heating devices may comprise a support frame accommodating, on the one hand, a heating body comprising heating elements arranged parallel to each other and, on the other hand, electrical tracks supplying the heating elements from connection terminals. . More advanced heating devices also include current control means supplying the heating elements.
  • Heating devices are energy intensive and therefore represent a major energy expenditure item. Automakers are therefore seeking to reduce the consumption of heaters in order to reduce the fuel consumption of vehicles equipped with an internal combustion engine or to increase the autonomy of vehicles equipped with electric or hybrid engines.
  • the Applicant has noticed that passengers of the same motor vehicle do not have the same needs for heated air. At a given temperature in the passenger compartment, the driver does not feel the cold in the same way as other passengers who are more sensitive.
  • the known heating devices continuously consume the same energy as the heated air is intended for a person or several persons sitting in the passenger compartment of the motor vehicle for a given air temperature synonymous with energy loss as air is unnecessarily heated.
  • the invention aims to overcome at least partly the disadvantages mentioned above and proposes for this purpose a heating device, in particular for air conditioning housing of a motor vehicle in which the device comprises a heating module, configured to heat an air flow from an electric current flowing in said module, said heating module defining a plurality of zones, each zone being able to heat the flow of air towards a part of a passenger compartment of said vehicle; automobile, each of said zones having a plurality of heating elements and wherein at least one of said zones has a number of heating elements different from a number of heating elements of another of said zones.
  • Such a heating device has the advantage of saving energy by reducing power consumption in favor of greater autonomy, especially when the vehicle comprises a propulsion engine of the electric or hybrid vehicle.
  • the device in which it comprises at least two zones, a first zone for heating the air flow towards the driver and a second zone for heating the air flow towards a front passenger of the motor vehicle; device in which the first zone comprises a number N1 of heating elements and the second zone comprises a number N2 of heating elements, the number N1 being lower than the number N2; device in which the heating elements have a temperature-dependent electrical resistance of said heating elements; device in which the heating elements have a positive temperature coefficient; device in which, the heating elements are arranged in bars, each zone comprising a plurality of bars; - Device in which each bar is controlled independently of one another; device in which the bars of the same zone are controlled so that a voltage and an identical current are sent in each bar of the same zone; device in which each bar of the first zone comprises heating elements and at least one non-heating element; device in which a non-heating element of a bar is arranged to be adjacent to a heating element of another bar; device in which each bar of the second takes five heating elements; device in which the first zone
  • the invention relates to a heating device 1, in particular for an air conditioning unit of a motor vehicle.
  • Said device 1 comprises a heating module 2, configured to heat a flow of air from an electric current flowing through said heating module 2.
  • Said heating module 2 presents here a substantially parallelepipedic configuration, extending on the surface. It is intended to be positioned transversely to the flow of air to be heated.
  • said heating module 2 comprises, for example, a support frame, in particular of plastic material, accommodating one or more heating elements.
  • Said heating elements comprise, for example, resistors with a CTP effect (for a positive temperature coefficient).
  • Each heating element advantageously forms a bar 4 accommodating the PTC resistors 3 or normal resistors 3, the latter being located one after the other and electrically connected in parallel.
  • the resistors 3 have a CTP effect.
  • the heating element 3 may further comprise dissipators, for example fins in thermal contact relation with the resistors 3 with PTC effect. The dissipators are positioned, in particular, on either side of said resistors 3.
  • Said device 1 further comprises a unit 5 for distributing and controlling the current in said heating module 2 and a power connector 6 of said current for connecting to the electrical source of the motor vehicle.
  • Said distribution unit 5 advantageously forms a connection and distribution interface for electrically connecting the heating module 2, in particular the various heating elements 3, to a power supply network of the vehicle, for example a 12 V DC network ( direct current) or 48 V DC or other, including a network incorporating a battery of the vehicle.
  • a power supply network of the vehicle for example a 12 V DC network ( direct current) or 48 V DC or other, including a network incorporating a battery of the vehicle.
  • connection and distribution interface is meant that the distribution unit 5 is sufficient to allow the flow of current in the heating module 2, without having to provide at said heating module 2 one or more terminals of specific connection to the vehicle power supply network.
  • Said distribution unit 5 is configured to modulate the current supplying the heating module 2, in particular the various elements heating, for example using controlled switches, for controlling a flow of current in said heating module 2.
  • controlled switches for controlling a flow of current in said heating module 2.
  • These include, in particular, transistors, for example of the Mosfet or IGBT type, operating in particular by pulse width modulation PWM (Pulse Width Modulation).
  • the heating module 2 and the dispensing unit 5 are configured to be assembled to each other flexibly or not.
  • the heating module 2 defines a plurality of zones 7, 8.
  • the heating module 2 comprises two zones 7, 8: a first zone 7 heating the flow of air for the driver and a second zone 8 heating the air flow for the (s) front passenger (s).
  • the heating module 2 comprises heating elements 3.
  • the heating elements 3 comprise resistors which can be made from various materials.
  • a preferred material is the PTC effect ceramic because it is a positive temperature coefficient material and has particularly advantageous properties in the invention. In particular its resistance varies according to its temperature, so the resistance increases when its temperature increases and vice versa. This advantageously makes it possible to reduce the consumption of said ceramics.
  • the first zone 7 comprises a number N1 of heating elements 3.
  • the second zone 8 comprises a number N2 of heating elements 3.
  • the number N1 is smaller than the number N2.
  • the air intended for the driver is heated by less heating elements 3 than the air that reaches the passenger.
  • the heating elements 3 are arranged in the bars 4.
  • Each zone 7, 8 comprises several bars 4.
  • the heating elements 3 of the same bar 4 are fed by electrodes common to all the heating elements 3 of the bar 4.
  • a bar 4 is present in the form of a profile comprising heating elements 3 spaced apart from each other.
  • a bar 4 also comprises electrodes common to the heating elements 3.
  • each bar 4 is controlled independently.
  • the electric current and the applied voltage are different from one bar 4 to the other. This advantageously makes it possible to control the heating of the air more precisely.
  • non-heating element means elements that do not heat, such as for example false ceramics or plastic separating elements.
  • a non-heating element 9 can also be a void space.
  • An empty space is particularly advantageous in that it reduces costs and facilitates the manufacture of the device 1.
  • a non-heating element 9 such as a false ceramic has the advantage for the support frame to have a better structural rigidity.
  • a non-heating element 9 of a bar 4 is arranged to be close to a heating element 3 of another bar 4. This advantageously makes it possible not to have a non-heating surface too important. Indeed, a too large non-heating surface could deteriorate the quality of air heating so that the driver or the passenger would feel temperature differences in the air flow.
  • the first zone 7 and the second zone 8 each comprise three bars 4.
  • Each bar 4 of the second zone 8 comprises five heating elements 3.
  • the device 1 comprises a first bar 4 located in the first zone 7 and having four heating elements 3 followed by a non-heating element 9.
  • the device 1 comprises a second bar 4 located in the first zone 7 and adjacent to the first bar 4 and having a heating element 3 followed by two non-heating elements 9 followed by two heating elements 3.
  • the device 1 comprises a third bar 4 located in the first zone 7, adjacent to the second bar 4 and identical to the first bar 4. In each bar 4 the elements 3, 9 heating and non-heating are arranged in line.
  • a lower number of heating elements in the first zone 7 with respect to the second zone 8 implies that the air towards the driver will be less heated. This seems a priori to reduce the comfort of the driver. However, the Applicant has noticed that the driver does not feel the temperature in the same way as the front passenger. Therefore, the lower number of heating elements 3 in the first zone 7 does not reduce the perceived thermal comfort per driver.
  • the heating device 1 which has just been described has the advantage of saving energy by reducing power consumption in favor of greater autonomy especially when the vehicle comprises an electric or hybrid vehicle propulsion engine.

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

Abstract

Heating device (1), particularly for air conditioning housing of a motor vehicle, wherein the device (1) comprises a heating module (2) configured to heat a flow of air using an electrical current circulating in the module (2), said heating module (2) defining a plurality of zones (7, 8), each zone (7, 8) being capable of heating the flow of air in the direction of one portion of a passenger compartment of said motor vehicle, each of said zones (7, 8) comprising a plurality of heating elements (3) and wherein at least one of said zones (7, 8) comprises a number of heating elements (3) that is different from a number of heating elements (3) heating another of said zones (7, 8).

Description

DISPOSITIF DE CHAUFFAGE, NOTAMMENT POUR BOITIER DE CLIMATISATION D'UN VEHICULE AUTOMOBILE  HEATING DEVICE, IN PARTICULAR FOR THE AIR CONDITIONING UNIT OF A MOTOR VEHICLE
La présente invention a pour objet un dispositif de chauffage, notamment pour boîtier de climatisation d'un véhicule. The present invention relates to a heating device, especially for air conditioning housing of a vehicle.
Il est connu des dispositifs de chauffage électrique destinés à être intégrés dans des boîtiers de climatisation de véhicule. Il s'agit soit de radiateurs additionnels, combinés avec des radiateurs de chauffage parcourus par un fluide caloporteur, dans les véhicules à moteur thermique, soit de radiateurs principaux, dans les véhicules électriques ou hybrides. Electric heating devices are known to be integrated in vehicle air conditioning units. These are either additional radiators, combined with heating radiators covered by a heat transfer fluid, in vehicles with a combustion engine or main radiators, in electric or hybrid vehicles.
De tels dispositifs de chauffage peuvent comprendre un cadre support accueillant, d'une part, un corps de chauffe comprenant des éléments chauffants disposés parallèlement les uns aux autres et, d'autre part, des pistes électriques alimentant les éléments chauffants depuis des bornes de connexion. Les dispositifs de chauffage plus perfectionnés comprennent également des moyens de contrôle du courant alimentant les éléments chauffants.  Such heating devices may comprise a support frame accommodating, on the one hand, a heating body comprising heating elements arranged parallel to each other and, on the other hand, electrical tracks supplying the heating elements from connection terminals. . More advanced heating devices also include current control means supplying the heating elements.
Les dispositifs de chauffage sont énergivores et représentent par conséquent un poste de dépense énergétique important. Les constructeurs automobiles cherchent donc à réduire la consommation des dispositifs de chauffage afin de réduire la consommation en carburant des véhicules équipés d'un moteur à combustion interne ou d'augmenter l'autonomies des véhicules équipés de moteurs électriques ou hybrides.  Heating devices are energy intensive and therefore represent a major energy expenditure item. Automakers are therefore seeking to reduce the consumption of heaters in order to reduce the fuel consumption of vehicles equipped with an internal combustion engine or to increase the autonomy of vehicles equipped with electric or hybrid engines.
La demanderesse s'est aperçue que les passagers d'un même véhicule automobile n'ont pas les mêmes besoins en air chauffé. A une température donnée dans l'habitacle, le conducteur ne ressent pas le froid de la même manière que les autres passagers lesquels sont plus sensibles.  The Applicant has noticed that passengers of the same motor vehicle do not have the same needs for heated air. At a given temperature in the passenger compartment, the driver does not feel the cold in the same way as other passengers who are more sensitive.
Les dispositifs de chauffage connus consomment continuellement la même énergie que l'air chauffé soit destiné à une personne ou plusieurs personnes assises dans l'habitacle du véhicule automobile pour une température d'air donnée synonyme de perte d'énergie dans la mesure où de l'air est chauffé inutilement. The known heating devices continuously consume the same energy as the heated air is intended for a person or several persons sitting in the passenger compartment of the motor vehicle for a given air temperature synonymous with energy loss as air is unnecessarily heated.
L'invention a pour objectif de pallier au moins en partie les inconvénients mentionnés plus haut et propose à cette fin un dispositif de chauffage, notamment pour boîtier de climatisation d'un véhicule automobile dans lequel le dispositif comporte un module de chauffe, configuré pour chauffer un flux d'air à partir d'un courant électrique circulant dans ledit module, ledit module de chauffe définissant une pluralité de zones, chaque zone étant apte à chauffer le flux d'air en direction d'une partie d'un habitacle dudit véhicule automobile, chacune desdites zones comportant une pluralité d'éléments chauffants et dans lequel au moins une desdites zones comporte un nombre d'éléments chauffants différent d'un nombre d'éléments chauffants d'une autre desdites zones. The invention aims to overcome at least partly the disadvantages mentioned above and proposes for this purpose a heating device, in particular for air conditioning housing of a motor vehicle in which the device comprises a heating module, configured to heat an air flow from an electric current flowing in said module, said heating module defining a plurality of zones, each zone being able to heat the flow of air towards a part of a passenger compartment of said vehicle; automobile, each of said zones having a plurality of heating elements and wherein at least one of said zones has a number of heating elements different from a number of heating elements of another of said zones.
Un tel dispositif de chauffage présente l'avantage d'économiser de l'énergie en réduisant la consommation électrique au profit d'une plus grande autonomie notamment lorsque le véhicule comprend un moteur de propulsion du véhicule électrique ou hybride. Such a heating device has the advantage of saving energy by reducing power consumption in favor of greater autonomy, especially when the vehicle comprises a propulsion engine of the electric or hybrid vehicle.
Selon d'autres caractéristiques de l'invention qui pourront être prise ensemble ou séparément : According to other features of the invention which may be taken together or separately:
dispositif dans lequel celui-ci comprend au moins deux zones, une première zone destinée à chauffer le flux d'air en direction du conducteur et une seconde zone destinée à chauffer le flux d'air en direction d'un passager avant du véhicule automobile ; dispositif dans lequel la première zone comprend un nombre N1 d'éléments chauffant et la seconde zone comprend un nombre N2 d'éléments chauffants, le nombre N1 étant inférieur au nombre N2 ; dispositif dans lequel les éléments chauffants présentent une résistance électrique dépendant de la température desdits éléments chauffants ; dispositif dans lequel les éléments chauffants sont à coefficient de température positif ; dispositif dans lequel, les éléments chauffants sont agencés dans des barreaux, chaque zone comportant une pluralité de barreaux ; - dispositif dans lequel chaque barreau est piloté indépendamment l'un de l'autre ; dispositif dans lequel les barreaux d'une même zone sont pilotés de sorte qu'une tension et un courant identique sont envoyés dans chaque barreau d'une même zone ; dispositif dans lequel chaque barreau de la première zone comprend des éléments chauffants et au moins un élément non chauffant ; dispositif dans lequel un élément non chauffant d'un barreau est agencé de sorte à être voisin d'un élément chauffant d'un autre barreau ; dispositif dans lequel chaque barreau de la seconde prend cinq éléments chauffants ; dispositif dans lequel la première zone comporte trois barreaux ; dispositif dans lequel : o un premier barreau de la première zone comporte quatre éléments chauffants suivis d'un élément non chauffant, o un deuxième barreau de la première zone et voisin du barreau et comportant un élément chauffant suivi de deux éléments non chauffants suivis de deux éléments chauffants, o un troisième barreau de la première zone et voisin du deuxième barreau et identique au premier barreau. device in which it comprises at least two zones, a first zone for heating the air flow towards the driver and a second zone for heating the air flow towards a front passenger of the motor vehicle; device in which the first zone comprises a number N1 of heating elements and the second zone comprises a number N2 of heating elements, the number N1 being lower than the number N2; device in which the heating elements have a temperature-dependent electrical resistance of said heating elements; device in which the heating elements have a positive temperature coefficient; device in which, the heating elements are arranged in bars, each zone comprising a plurality of bars; - Device in which each bar is controlled independently of one another; device in which the bars of the same zone are controlled so that a voltage and an identical current are sent in each bar of the same zone; device in which each bar of the first zone comprises heating elements and at least one non-heating element; device in which a non-heating element of a bar is arranged to be adjacent to a heating element of another bar; device in which each bar of the second takes five heating elements; device in which the first zone has three bars; device in which: a first bar of the first zone comprises four heating elements followed by a non-heating element, a second bar of the first zone and adjacent to the bar and comprising a heating element followed by two non-heating elements followed by two heating elements, o a third bar of the first zone and adjacent to the second bar and identical to the first bar.
L'invention sera mieux comprise et d'autres détails, caractéristiques et avantages de l'invention apparaîtront à la lecture de la description suivante faite à titre d'exemple non limitatif et en référence à la figure qui illustre de façon schématique en vue de face, un dispositif de chauffage selon l'invention, The invention will be better understood and other details, features and advantages of the invention will appear on reading the following description given by way of non-limiting example and with reference to the figure which schematically illustrates in front view. , a heating device according to the invention,
Comme illustré sur la figure, l'invention concerne un dispositif 1 de chauffage, notamment pour boîtier de climatisation d'un véhicule automobile. As illustrated in the figure, the invention relates to a heating device 1, in particular for an air conditioning unit of a motor vehicle.
Ledit dispositif 1 comporte un module 2 de chauffe, configuré pour chauffer un flux d'air à partir d'un courant électrique circulant à travers ledit module 2 de chauffe. Ledit module 2 de chauffe présente ici une configuration sensiblement parallélépipédique, s'étendant en surface. Il est destiné à être positionné de façon transversale au flux d'air à réchauffer. Said device 1 comprises a heating module 2, configured to heat a flow of air from an electric current flowing through said heating module 2. Said heating module 2 presents here a substantially parallelepipedic configuration, extending on the surface. It is intended to be positioned transversely to the flow of air to be heated.
Bien que cela ne soit pas détaillé sur la figure, ledit module 2 de chauffe comprend, par exemple, un cadre support, notamment en matériau plastique, accueillant un ou plusieurs éléments chauffants. Lesdits éléments chauffants comprennent par exemple, des résistances à effet CTP (pour coefficient de température positif). Chaque élément chauffant forme avantageusement un barreau 4 accueillant les résistances 3 à effet CTP ou des résistances 3 normales, ces dernières étant situées les unes à la suite des autres et connectées électriquement en parallèle. Dans un mode de réalisation préféré, les résistances 3 sont à effet CTP. L'élément 3 chauffant peut en outre comprendre des dissipateurs, par exemple des ailettes en relation de contact thermique avec les résistances 3 à effet CTP. Les dissipateurs sont positionnés, notamment, de part et d'autre desdites résistances 3.  Although this is not detailed in the figure, said heating module 2 comprises, for example, a support frame, in particular of plastic material, accommodating one or more heating elements. Said heating elements comprise, for example, resistors with a CTP effect (for a positive temperature coefficient). Each heating element advantageously forms a bar 4 accommodating the PTC resistors 3 or normal resistors 3, the latter being located one after the other and electrically connected in parallel. In a preferred embodiment, the resistors 3 have a CTP effect. The heating element 3 may further comprise dissipators, for example fins in thermal contact relation with the resistors 3 with PTC effect. The dissipators are positioned, in particular, on either side of said resistors 3.
Ledit dispositif 1 comprend en outre, une unité 5 de distribution et de commande du courant dans ledit module 2 de chauffe et un connecteur 6 de puissance dudit courant permettant de connecter à la source électrique du véhicule automobile.  Said device 1 further comprises a unit 5 for distributing and controlling the current in said heating module 2 and a power connector 6 of said current for connecting to the electrical source of the motor vehicle.
Ladite unité 5 de distribution forme avantageusement une interface de connexion et de distribution pour relier électriquement le module 2 de chauffe, en particulier les différents éléments 3 chauffants, à un réseau d'alimentation en courant du véhicule, par exemple un réseau 12 V DC (courant continu) ou 48 V DC ou autre, notamment un réseau intégrant une batterie du véhicule. Par « interface de connexion et de distribution», on entend que l'unité 5 de distribution est suffisante pour permettre la circulation du courant dans le module 2 de chauffe, sans avoir à prévoir au niveau dudit module 2 de chauffe une ou plusieurs bornes de connexion spécifiques au réseau d'alimentation en courant du véhicule.  Said distribution unit 5 advantageously forms a connection and distribution interface for electrically connecting the heating module 2, in particular the various heating elements 3, to a power supply network of the vehicle, for example a 12 V DC network ( direct current) or 48 V DC or other, including a network incorporating a battery of the vehicle. By "connection and distribution interface" is meant that the distribution unit 5 is sufficient to allow the flow of current in the heating module 2, without having to provide at said heating module 2 one or more terminals of specific connection to the vehicle power supply network.
Ladite unité 5 de distribution est configurée pour moduler le courant alimentant le module 2 de chauffe, en particulier les différents éléments chauffants, par exemple à l'aide de commutateurs pilotés, permettant de contrôler une circulation de courant dans ledit module 2 de chauffe. Il s'agit, notamment, de transistors, par exemple du type Mosfet ou IGBT, fonctionnant en particulier par modulation de largeur d'impulsions PWM (Puise Width Modulation). Said distribution unit 5 is configured to modulate the current supplying the heating module 2, in particular the various elements heating, for example using controlled switches, for controlling a flow of current in said heating module 2. These include, in particular, transistors, for example of the Mosfet or IGBT type, operating in particular by pulse width modulation PWM (Pulse Width Modulation).
Le module 2 de chauffe et l'unité 5 de distribution sont configurés pour être assemblés l'un à l'autre de façon modulable ou pas.  The heating module 2 and the dispensing unit 5 are configured to be assembled to each other flexibly or not.
Selon l'invention, le module 2 de chauffe définit une pluralité de zones 7, 8. Dans le mode de réalisation représenté sur les figures, le module 2 de chauffe comporte deux zones 7, 8 : une première zone 7 chauffant le flux d'air destinée au conducteur et une seconde zone 8 chauffant le flux d'air destiné au(x) passager(s) avant.  According to the invention, the heating module 2 defines a plurality of zones 7, 8. In the embodiment shown in the figures, the heating module 2 comprises two zones 7, 8: a first zone 7 heating the flow of air for the driver and a second zone 8 heating the air flow for the (s) front passenger (s).
Ainsi que précédemment évoqué, le module 2 de chauffe comprend des éléments 3 chauffants. Les éléments 3 chauffants comprennent des résistances qui peuvent être fabriquées à partir de divers matériaux. As previously mentioned, the heating module 2 comprises heating elements 3. The heating elements 3 comprise resistors which can be made from various materials.
Toutefois, un matériau préféré est la céramique à effet PTC car celle-ci est un matériau à coefficient de température positif et présente des propriétés particulièrement avantageuses dans l'invention. En particulier sa résistance varie en fonction de sa température, ainsi la résistance augmente lorsque sa température augmente et inversement. Ceci permet avantageusement de diminuer la consommation desdites céramiques. However, a preferred material is the PTC effect ceramic because it is a positive temperature coefficient material and has particularly advantageous properties in the invention. In particular its resistance varies according to its temperature, so the resistance increases when its temperature increases and vice versa. This advantageously makes it possible to reduce the consumption of said ceramics.
Ainsi qu'illustré sur la figure, la première zone 7 comprend un nombre N1 d'éléments 3 chauffants. La seconde zone 8 comprend un nombre N2 d'éléments 3 chauffants.  As illustrated in the figure, the first zone 7 comprises a number N1 of heating elements 3. The second zone 8 comprises a number N2 of heating elements 3.
Le nombre N1 est inférieur au nombre N2. Ainsi l'air destiné au conducteur est chauffé par moins d'éléments 3 chauffants que l'air qui arrive au passager.  The number N1 is smaller than the number N2. Thus the air intended for the driver is heated by less heating elements 3 than the air that reaches the passenger.
Les éléments 3 chauffants sont agencés dans les barreaux 4. The heating elements 3 are arranged in the bars 4.
Chaque zone 7, 8 comprend plusieurs barreaux 4. Les éléments 3 chauffants d'un même barreau 4 sont alimentés par des électrodes communes à tous les éléments 3 chauffants du barreau 4. Un barreau 4 se présente sous la forme d'un profilé comportant des éléments 3 chauffants espacés les uns des autres. Un barreau 4 comprend également des électrodes communes aux éléments 3 chauffants. Each zone 7, 8 comprises several bars 4. The heating elements 3 of the same bar 4 are fed by electrodes common to all the heating elements 3 of the bar 4. A bar 4 is present in the form of a profile comprising heating elements 3 spaced apart from each other. A bar 4 also comprises electrodes common to the heating elements 3.
Le courant électrique envoyé et la tension appliquée à chaque barreau 4 d'une même zone 7, 8 est identique.  The electric current sent and the voltage applied to each bar 4 of the same area 7, 8 is identical.
Dans une variante de réalisation chaque barreau 4 est piloté indépendamment. Ainsi le courant électrique et la tension appliqués sont différents d'un barreau 4 à l'autre. Ceci permet avantageusement de contrôler de manière plus précise la chauffe de l'air.  In an alternative embodiment each bar 4 is controlled independently. Thus the electric current and the applied voltage are different from one bar 4 to the other. This advantageously makes it possible to control the heating of the air more precisely.
Dans le mode de réalisation représenté sur la figure, chaque barreau In the embodiment shown in the figure, each bar
4 de la première zone 7 comporte des éléments 3 chauffants et au moins un élément 9 non chauffant. 4 of the first zone 7 comprises heating elements 3 and at least one non-heating element 9.
On entend par « élément non chauffant », des éléments qui ne chauffent pas comme par exemple des fausses céramiques ou des éléments de séparation en matière plastique. Toutefois, un élément 9 non chauffant peut aussi être un espace vide.  The term "non-heating element" means elements that do not heat, such as for example false ceramics or plastic separating elements. However, a non-heating element 9 can also be a void space.
Un espace vide est particulièrement avantageux en ce qu'il permet de réduire les coûts et facilite la fabrication du dispositif 1 . Toutefois, un élément 9 non chauffant telle qu'une fausse céramique présente l'avantage pour le cadre support d'avoir une meilleure rigidité structurelle.  An empty space is particularly advantageous in that it reduces costs and facilitates the manufacture of the device 1. However, a non-heating element 9 such as a false ceramic has the advantage for the support frame to have a better structural rigidity.
Ainsi qu'illustré sur la figure, un élément 9 non chauffant d'un barreau 4 est agencé de sorte à être voisin d'un élément 3 chauffant d'un autre barreau 4. Ceci permet avantageusement de ne pas avoir une surface non chauffante trop importante. En effet, une surface non chauffante trop importante pourrait détériorer la qualité de chauffe de l'air si bien que le conducteur ou le passager ressentirait des différences de température dans le flux d'air.  As illustrated in the figure, a non-heating element 9 of a bar 4 is arranged to be close to a heating element 3 of another bar 4. This advantageously makes it possible not to have a non-heating surface too important. Indeed, a too large non-heating surface could deteriorate the quality of air heating so that the driver or the passenger would feel temperature differences in the air flow.
Dans l'exemple de réalisation non limitatif représenté sur la figure, la première zone 7 et la seconde zone 8 comprennent chacune trois barreaux 4. Chaque barreau 4 de la seconde zone 8 comprend cinq éléments 3 chauffants. Dans le mode de réalisation représenté sur la figure, le dispositif 1 comprend un premier barreau 4 situé dans la première zone 7 et comportant quatre éléments 3 chauffants suivis d'un élément 9 non chauffant. Le dispositif 1 comprend un deuxième barreau 4 situé dans la première zone 7 et voisin du premier barreau 4 et comportant un élément 3 chauffant suivi de deux éléments 9 non chauffants suivis de deux éléments 3 chauffants. Le dispositif 1 comprend un troisième barreau 4 situé dans la première zone 7, voisin du deuxième barreau 4 et identique au premier barreau 4. Dans chaque barreau 4 les éléments 3, 9 chauffants et non chauffants sont agencés en ligne. In the non-limiting embodiment shown in the figure, the first zone 7 and the second zone 8 each comprise three bars 4. Each bar 4 of the second zone 8 comprises five heating elements 3. In the embodiment shown in the figure, the device 1 comprises a first bar 4 located in the first zone 7 and having four heating elements 3 followed by a non-heating element 9. The device 1 comprises a second bar 4 located in the first zone 7 and adjacent to the first bar 4 and having a heating element 3 followed by two non-heating elements 9 followed by two heating elements 3. The device 1 comprises a third bar 4 located in the first zone 7, adjacent to the second bar 4 and identical to the first bar 4. In each bar 4 the elements 3, 9 heating and non-heating are arranged in line.
Un nombre inférieur d'éléments chauffants dans la première zone 7 par rapport à la seconde zone 8 implique que l'air en direction du conducteur sera moins chauffé. Ceci semble a priori réduire le confort du conducteur. Toutefois la demanderesse s'est aperçue que le conducteur ne ressent pas la température de la même façon que le passager avant. Par conséquent, le nombre inférieur d'éléments 3 chauffants dans la première zone 7 ne réduit pas le confort thermique perçu par conducteur.  A lower number of heating elements in the first zone 7 with respect to the second zone 8 implies that the air towards the driver will be less heated. This seems a priori to reduce the comfort of the driver. However, the Applicant has noticed that the driver does not feel the temperature in the same way as the front passenger. Therefore, the lower number of heating elements 3 in the first zone 7 does not reduce the perceived thermal comfort per driver.
Le dispositif 1 de chauffage qui vient d'être décrit présente l'avantage d'économiser de l'énergie en réduisant la consommation électrique au profit d'une plus grande autonomie notamment lorsque le véhicule comprend un moteur de propulsion du véhicule électrique ou hybride. The heating device 1 which has just been described has the advantage of saving energy by reducing power consumption in favor of greater autonomy especially when the vehicle comprises an electric or hybrid vehicle propulsion engine.

Claims

REVENDICATIONS
1 . Dispositif (1 ) de chauffage, notamment pour boîtier de climatisation d'un véhicule automobile caractérisé en ce que le dispositif (1 ) comporte un module (2) de chauffe, configuré pour chauffer un flux d'air à partir d'un courant électrique circulant dans ledit module (2), ledit module (2) de chauffe définissant une pluralité de zones (7, 8), chaque zone (7, 8) étant apte à chauffer le flux d'air en direction d'une partie d'un habitacle dudit véhicule automobile, chacune desdites zones (7, 8) comportant une pluralité d'éléments (3) chauffants et en ce qu'au moins une desdites zones (7, 8) comporte un nombre d'éléments (3) chauffants différent d'un nombre d'éléments (3) chauffants d'une autre desdites zones (7, 8). 1. Device (1) for heating, especially for an air-conditioning unit of a motor vehicle, characterized in that the device (1) comprises a heating module (2), configured to heat an air flow from an electric current circulating in said module (2), said heating module (2) defining a plurality of zones (7, 8), each zone (7, 8) being able to heat the flow of air towards a part of a passenger compartment of said motor vehicle, each of said zones (7, 8) comprising a plurality of heating elements (3) and in that at least one of said zones (7, 8) comprises a number of different heating elements (3) a number of heating elements (3) of another of said zones (7, 8).
2. Dispositif (1 ) selon la revendication 1 dans lequel celui-ci comprend au moins deux zones (7, 8), une première zone (7) destinée à chauffer le flux d'air en direction du conducteur et une seconde zone (8) destinée à chauffer le flux d'air en direction d'un passager avant du véhicule automobile. 3. Dispositif (1 ) selon la revendication 2 dans lequel la première zone2. Device (1) according to claim 1 wherein it comprises at least two zones (7, 8), a first zone (7) for heating the air flow towards the driver and a second zone (8). ) for heating the air flow towards a front passenger of the motor vehicle. 3. Device (1) according to claim 2 wherein the first zone
(7) comprend un nombre N1 d'éléments (3) chauffants et la seconde zone(7) comprises a number N1 of heating elements (3) and the second zone
(8) comprend un nombre N2 d'éléments (3) chauffants, le nombre N1 étant inférieur au nombre N2. 4. Dispositif (1 ) selon la revendication 3 dans lequel les éléments (3) chauffants présentent une résistance électrique dépendant de la température desdits éléments (3) chauffants. (8) comprises a number N2 of heating elements (3), the number N1 being smaller than the number N2. 4. Device (1) according to claim 3 wherein the elements (3) heating have a temperature-dependent electrical resistance of said elements (3) heating.
5. Dispositif (1 ) selon la revendication 4 dans lequel les éléments (3) chauffants sont à coefficient de température positif. 5. Device (1) according to claim 4 wherein the elements (3) heating are positive temperature coefficient.
6. Dispositif (1 ) selon la revendication 5 dans lequel, les éléments (3) chauffants sont agencés dans des barreaux (4), chaque zone (7, 8) comportant une pluralité de barreaux (4). 7. Dispositif (1 ) selon la revendication 6 dans lequel chaque barreau (4) est piloté indépendamment l'un de l'autre. 6. Device (1) according to claim 5 wherein, the elements (3) heating are arranged in bars (4), each zone (7, 8) having a plurality of bars (4). 7. Device (1) according to claim 6 wherein each bar (4) is controlled independently of one another.
8. Dispositif (1 ) selon la revendication 6 dans lequel les barreaux (4) d'une même zone (7, 8) sont pilotés de sorte qu'une tension et un courant identique sont envoyés dans chaque barreau (4) d'une même zone (7, 8). 8. Device (1) according to claim 6 wherein the bars (4) of the same area (7, 8) are controlled so that a voltage and an identical current are sent in each bar (4) of a same area (7, 8).
9. Dispositif (1 ) selon l'une quelconque des revendications 6 à 8 dans lequel chaque barreau (4) de la première zone (7) comprend des éléments (3) chauffants et au moins un élément (9) non chauffant. 9. Device (1) according to any one of claims 6 to 8 wherein each bar (4) of the first zone (7) comprises heating elements (3) and at least one element (9) non-heating.
10. Dispositif (1 ) selon la revendication 9 dans lequel un élément (9) non chauffant d'un barreau (4) est agencé de sorte à être voisin d'un élément (3) chauffant d'un autre barreau (4). 10. Device (1) according to claim 9 wherein a member (9) of a non-heating bar (4) is arranged to be adjacent to a member (3) heating of another bar (4).
EP18808432.1A 2017-10-24 2018-10-24 Heating device, particularly for air conditioning housing of a motor vehicle Withdrawn EP3766303A1 (en)

Applications Claiming Priority (2)

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FR1760050A FR3072616B1 (en) 2017-10-24 2017-10-24 HEATING DEVICE, PARTICULARLY FOR AIR CONDITIONING HOUSING OF A MOTOR VEHICLE
PCT/FR2018/052648 WO2019081856A1 (en) 2017-10-24 2018-10-24 Heating device, particularly for air conditioning housing of a motor vehicle

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US20200348046A1 (en) 2020-11-05
FR3072616A1 (en) 2019-04-26
FR3072616B1 (en) 2020-02-07
WO2019081856A1 (en) 2019-05-02

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