• 专利附录
  • 专利说明
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    • 专利摘要:
    The invention relates to an electric fluid heater (1) comprising: - at least one fluid inlet (7), at least one fluid outlet (11), at least one heating element (13), - at least one first temperature sensor (21) for measuring the temperature of said at least one heating element (13), and - a control module (15) of said at least one heating element (13). According to the invention, - said device (1) comprises at least a second temperature sensor (23) for measuring the temperature of the fluid at said at least one outlet (11), and - the control module (15) comprises at least one processing means (17, 19, 35) for: • operating the temperature information (T21, T23) of the temperature sensors (21, 23), and for generating a command of said at least one heating element (13); ) according to the temperature information (T21, T23). The invention also relates to a heating circuit and an associated temperature management method.
    公开号:FR3062601A1
    申请号:FR1750960
    申请日:2017-02-06
    公开日:2018-08-10
    发明作者:Frederic Pierron；Laurent Tellier
    申请人:Valeo Systemes Thermiques SAS；
    IPC主号:
    专利说明:

    ® FRENCH REPUBLIC
    NATIONAL INSTITUTE OF INDUSTRIAL PROPERTY © Publication number: 3,062,601 (to be used only for reproduction orders)
    ©) National registration number: 17 50960
    COURBEVOIE © IntCI 8
    B 60 H 1/22 (2017.01), G 05 D 23/24
    A1 PATENT APPLICATION
    ®) Date of filing: 06.02.17. © Applicant (s): VALEO THERMAL SYSTEMS (30) Priority: Simplified joint stock company - FR. @ Inventor (s): PIERRON FREDERIC and TELLIER LAURENT. (43) Date of public availability of the request: 10.08.18 Bulletin 18/32. ©) List of documents cited in the report preliminary research: Refer to end of present booklet (© References to other national documents ® Holder (s): VALEO THERMAL SYSTEMS related: Joint stock company. ©) Extension request (s): © Agent (s): VALEO THERMAL SYSTEMS.
    ELECTRIC HEATING DEVICE, CORRESPONDING HEATING CIRCUIT AND METHOD FOR MANAGING THE TEMPERATURE.
    FR 3,062,601 - A1 _ The invention relates to an electric heating device (1) for fluid comprising:
    - at least one fluid inlet (7), at least one fluid outlet (11), at least one heating element (13),
    - at least a first temperature sensor (21) for measuring the temperature of said at least one heating element (13), and
    - a control module (15) of said at least one heating element (13).
    According to the invention,
    said device (1) comprises at least a second temperature sensor (23) for measuring the temperature of the fluid at said at least one outlet (11), and
    - the control module (15) comprises at least one processing means (17, 19, 35) for:
    exploit the temperature information (T 2 i, T 23 ) of the temperature sensors (21,23), and to generate a command of said at least one heating element (13) as a function of the temperature information ( T 21 * T 23) ·
    The invention also relates to a heating circuit and a method for managing the associated temperature.
    F1

    The invention relates to an electric fluid heating device for a motor vehicle. The invention also relates to a heating circuit comprising such a heating device. The invention also applies to the heating and / or air conditioning devices of motor vehicles comprising such a heating device. The invention also relates to a method for managing the temperature of a fluid within such an electric heating device.
    In particular in the case of an electric or hybrid vehicle, provision may be made for a circuit for heating a fluid such as heat transfer liquid, for heating the passenger compartment. Such a heating circuit generally comprises an electric heating device also called a heater or electric heater, which makes it possible to heat the passenger compartment of the vehicle, by providing, by the Joule effect, heat to the heat transfer liquid of the heating circuit. This heating circuit also incorporates at least one radiator to dissipate this heat to the passenger compartment.
    The electric heater comprises one or more heating elements intended to be in contact with the fluid to be heated, such as heat transfer liquid.
    To manage the thermal heating power, such a heater generally incorporates power and control electronics components, for injecting into the heating elements, an electric power corresponding to a set value sent by a central unit of the motor vehicle equipped with 'such a heater. For current heaters available on the market, the temperature is managed by the car manufacturer and is generally out of the heater's control.
    According to a known solution, a temperature sensor is implemented directly on the heating element of the heater for the temperature control of the heating element. Typically, such a sensor is used to prevent overheating or an abnormal temperature of the heating element. In other words, the temperature sensor is used as a detection element for a particular event, such as excessive temperature. The vehicle network can interpret this event to deactivate the heating element or overheated heating elements. However,
    -2this temperature information is not used within the heater to regulate the temperature of the liquid circulating in the heater.
    The present invention relates to a variant making it possible to manage the temperature of the fluid, such as coolant, at the outlet of the heater in order to reach the correct temperature level according to the setpoint addressed, while reducing the risk of fluid overheating.
    To this end, the invention relates to an electric fluid heating device for a motor vehicle, comprising:
    at least one fluid inlet, at least one fluid outlet, at least one heating element for electrically heating the fluid, at least one first temperature sensor arranged so as to measure the temperature of said at least one heating element, and a module for control of said at least one heating element.
    According to the invention, said device further comprises at least a second temperature sensor arranged so as to measure the temperature of the fluid at said at least one outlet of said device, and the control module comprises at least one processing means for :
    • exploit the temperature information of the first and second temperature sensors, and to • generate a command of said at least one heating element as a function of the temperature information of the first and second temperature sensors, so as to regulate the temperature of the fluid within of the heater.
    Thus, by correlating the temperature information of the heating elements and the temperature at the outlet of said device, the control module integrated in said device can interpret this information to modify the control of the heating elements in order to regulate the temperature of the fluid while leaving minimizing the risk of overheating of the heating elements.
    Said device may also include one or more of the following characteristics, taken separately or in combination:
    Said at least one second temperature sensor is molded on said device; said at least one outlet is produced in the form of an outlet pipe; said at least one second temperature sensor is arranged on the outlet pipe;
    said at least one second temperature sensor is arranged near the outlet pipe:
    said at least one first temperature sensor is fixed to said at least one heating element;
    said at least one heating element comprises at least one heating resistor; at least one temperature sensor includes a temperature sensitive element; the temperature sensitive element of said at least one second temperature sensor is arranged so as to be immersed in the fluid in operation of said device;
    the temperature-sensitive element is a thermistor with a negative temperature coefficient;
    the temperature sensitive element of said at least one temperature sensor is electrically connected to the control module;
    the control module comprises at least one comparator configured for:
    • receiving at a first input a heating instruction and for • receiving at a second input electrical information representative of the temperature of the fluid at said at least one output measured by said at least one second temperature sensor;
    the comparator is configured to compare the electrical information representative of the temperature of the fluid with the heating setpoint;
    at least one processing means of the control module is configured to determine a control and / or supply signal of said at least one heating element as a function of the result of the comparison between the electrical information representative of the temperature of the fluid at the heating setpoint;
    the control and / or supply signal comprises at least one piece of electrical power information to be injected into each heating element;
    the control and / or supply signal includes at least one piece of information
    -4 PWM pulse width modulation;
    said device comprises at least one microcontroller and at least one power switch configured to be controlled by the microcontroller; said device comprises:
    • a first fluid outlet, • a second fluid outlet, • a first heating element connected to the first fluid outlet, configured to electrically heat, to a first temperature, part of the heat transfer liquid intended to flow through the first outlet, • a second heating element connected to the second fluid outlet, configured to electrically heat, to a second temperature different from the first temperature, another part of the heat transfer liquid intended to flow through the second outlet, • for each heating element, a first associated temperature sensor arranged so as to measure the temperature of the associated heating element, and • for each fluid outlet, a second associated temperature sensor arranged so as to measure the temperature of the fluid at the associated output.
    The invention also relates to a heating circuit for a motor vehicle comprising at least one electric heating device as defined above.
    According to one aspect of the invention, said circuit further comprises at least first and second heat exchangers configured to diffuse heat to two distinct regions of the passenger compartment of the vehicle. The first fluid outlet of said device is connected to the first heat exchanger, and the second fluid outlet of said device is connected to the second heat exchanger.
    According to another aspect of the invention, the two heat exchangers are integrated in the same heat diffusion member.
    The invention also relates to a method for managing the temperature of a fluid within an electric heating device as defined above.
    According to the invention, said method comprises the following steps: the temperature of each heating element is measured, at least one electrical information representative of the temperature of the associated heating element is emitted, the temperature of the fluid is measured at each outlet from said device, at least one electrical information representative of the temperature of the fluid is emitted at each outlet from said device, a control and / or power supply signal for the heating element is determined for each heating element as a function of the temperature information of the heating elements and said at least one outlet, so as to regulate the temperature of the fluid within the heating device.
    More precisely :
    each first temperature sensor measures the temperature of an associated heating element, each first temperature sensor emits at least one electrical information representative of the temperature of the heating element associated with the control module, each second temperature sensor measures the temperature of the fluid at at least one associated output of said device, each second temperature sensor emits at least one electrical information, representative of the temperature of the fluid at said at least one output of said device, at the control module, the control module determines for each element heater, a signal for controlling and / or supplying the heater element as a function of the temperature information of the first and second temperature sensors, so as to regulate the temperature of the fluid within the heater.
    The temperature management is therefore done directly within the heating device and not at the level of the vehicle network.
    Said method can also include one or more of the following characteristics, taken separately or in combination:
    said method comprises a step of comparing the temperature measured by a first temperature sensor with a threshold temperature;
    Said method comprises a step of comparing the temperature measured by a second temperature sensor with a heating instruction; said method comprises a step in which the control module determines which heating element should be activated based on the temperature information of the first and second temperature sensors;
    the control module comprises at least one microcontroller and at least one power switch for each heating element, and the microcontroller controls each power switch so as to activate or deactivate the associated heating element.
    Other characteristics and advantages of the invention will appear more clearly on reading the following description, given by way of illustrative and nonlimiting example, and of the appended drawings among which:
    - Figure 1 is a perspective view of an electric heating device according to a first embodiment,
    - Figure 2 is a block diagram of a method of heating a heat transfer liquid received in the electric heating device according to the first embodiment,
    FIG. 3a is a perspective view of a first example of a temperature sensor for the electric heating device,
    FIG. 3b is a perspective view of a second example of a temperature sensor for the electric heating device,
    FIG. 3c is a perspective view of a third example of a temperature sensor for the electric heating device,
    FIG. 4 is a first example of a temperature sensor configured to be molded on the electric heating device,
    FIG. 5 is a second example of a temperature sensor configured to be molded on the electric heating device,
    - Figure 6 is a schematic representation of a heating circuit comprising an electric heating device according to a second embodiment shown in perspective, and comprising two radiators joined together in a single
    -7organ, and
    - Figure 7 is a block diagram of a method of heating a heat transfer liquid received in the electric heating device according to the second embodiment.
    In these figures, the substantially identical elements have the same references.
    The following embodiments are examples. Although the description refers to one or more embodiments, this does not necessarily mean that each reference relates to the same embodiment, or that the characteristics apply only to a single embodiment. Simple features of different embodiments can also be combined or interchanged to provide other embodiments.
    In the description, it is possible to index certain elements, such as for example first element or second element. In this case, it is a simple indexing to differentiate and name similar but not identical elements. This indexing does not imply a priority of one element over another and one can easily interchange such names without departing from the scope of this description. This indexing does not imply an order in time either.
    With reference to FIG. 1, the invention relates to an electrical fluid heating device 1 for a motor vehicle of a heating circuit, in particular for a heating and / or air conditioning device.
    Heating device and circuit
    First embodiment
    FIG. 1 shows a first embodiment of an electric heating device 1 for fluid for a motor vehicle for a heating and / or air conditioning device.
    The electric heating device 1 is for example an additional heating device making it possible to heat a heat-transfer liquid such as water circulating in a water heating circuit for heating the passenger compartment of a
    -8electric vehicle.
    In the present, the electric heating device 1 is also called heater 1. We also speak of electric radiator. In the following description, reference is made to a heat transfer liquid. Of course, the invention can be applied to any other fluid.
    The heater 1 shown comprises an inlet housing 3 and an outlet housing 4. In particular, the heater 1 comprises a casing 2 comprising the inlet housing 3 and the outlet housing 4 covering the inlet housing 3.
    The input box 3 delimits an internal space in which electrical and / or electronic components can be mounted, for example assembled on a power electronic card (not shown).
    This inlet box 3 also has an inlet for power and control cables 6 as well as at least one inlet or inlet 7 for heat transfer liquid. The inlet 7 can be made in the form of an intake manifold 7, for example arranged projecting from the inlet box 3.
    The inlet housing 3 of the casing 2 may be formed by a body or a base 8 open on one side, and by a cover or cover 9 closing the body or base 8, so as to jointly delimit with this body 8 the internal space containing the electrical and / or electronic components. The cover 9 may have a generally substantially flat shape.
    The heat transfer liquid received via the inlet 7 is intended to be directed by channels (not visible in the figures) towards the outlet box 4 of the casing 2, in order to be heated there.
    Of course, the internal space in which the electrical and / or electronic components are mounted is completely separate and isolated from the channels (not visible) through which is intended to transit the heat transfer liquid.
    The outlet box 4 of the casing 2 covers the inlet box 3 while being integral with it in a sealed manner, so that the heat transfer liquid received via the inlet 7 is directed towards the outlet box 4. The heat transfer liquid admitted by the inlet 7 of the inlet box 3 of the casing 2 is thus transferred to the outlet box 4 to be heated there
    -9before evacuation.
    In order to allow the evacuation of the heat transfer liquid, the outlet housing 4 has at least one outlet 11 for the heat transfer liquid. According to the example illustrated, the outlet 11 for heat transfer liquid is produced in the form of an outlet pipe 11, for example arranged projecting on the outlet box 4. The outlet pipe 11 is intended to be connected to a circuit of the liquid coolant such as the water heating circuit.
    This outlet box 4 contains one or more heating elements 13 (see FIG. 2), for example by Joule effect. In particular, the heating element or elements 13 comprise at least one electrical means for heating the fluid, such as a heating resistor.
    In this case, the heater 1 comprises a control module 15 or electronic control module 15, of the heating element or elements 13. With reference to FIGS. 1 and 2, the heater 1 is controlled and supplied electrically via the cables 6 connected to a source of electrical power for the vehicle and to the control module 15.
    The control module 15 is connected to a central unit (not shown) of a motor vehicle equipped with the heater 1, via one or more electrical communication wires. This central unit (not shown) can in particular transmit information for limiting electrical consumption to the control module 15, as shown diagrammatically by the arrow Fl. The central unit (not shown) can also transmit a heating instruction C to the module 15.
    In addition, the control module 15 is configured to send control signals to the heating element 13. By way of nonlimiting example, they may be periodic control signals, with pulse width modulation, known by the acronym PWM for the English "Puise Width Modulation". The operating power can be communicated thanks to the duty cycle of the PWM signal, this duty cycle being defined by the ratio between the duration of maintenance in the high state and the period of the PWM signal.
    The control module 15 comprises the electrical and / or electronic components mounted in the internal space of the input box 3. By way of example, the control module 15 can comprise at least one power switch 17,
    -10 such as a power transistor, capable of authorizing or prohibiting the supply of the heating element 13. The supply switch 17, in particular its opening and / or closing, can be controlled by a control circuit 19 comprising including a microcontroller.
    The electrical and / or electronic components of the control module 15 can be mounted on an electrical circuit support (not shown), such as a printed circuit board (or PCB in English for “Printed circuit board”).
    The control module 15 also comprises at least one means of exploiting a measurement signal as detailed below.
    In addition, the heater 1 comprises at least a first temperature sensor 21, arranged so as to measure the temperature of the heating element or elements 13. The first temperature sensor 21 can comprise a temperature-sensitive element such as a thermistor. It is in particular a thermistor with negative temperature coefficient whose abbreviation is “CTN” or “NTC” in English for “Negative Temperature Coefficient”, that is to say whose resistance decreases in a uniform manner with the temperature. The or each first temperature sensor 21 is arranged directly on the associated heating element 13, for example by being fixed, for example by bonding or soldering, on the external surface of the associated heating element 13.
    At least one second temperature sensor 23 is further provided, configured to measure the temperature of the heat transfer liquid at the outlet 11. Similarly to the first temperature sensor 21, the second temperature sensor 23, for example made of brass, can include a temperature sensitive element such as a thermistor. This is in particular a thermistor with a negative temperature coefficient.
    Referring again to FIG. 1, the second temperature sensor 23 can be fixed to the external surface of the outlet pipe 11, as shown schematically by a solid outline of a block diagramming the second temperature sensor 23. As a variant, the second temperature sensor 23 can be fixed near the outlet pipe 11, on the outlet box 4, as
    -11this is represented schematically by a dotted outline of a block diagramming the second temperature sensor 23.
    Advantageously, the second temperature sensor 23 is arranged so that in operation of the heater 1, the thermistor is immersed in the liquid leaving the heater 1.
    Examples of temperature sensors, more particularly of second temperature sensors 23, are shown in FIGS. 3a to 3c and 4 and 5.
    In the examples of FIGS. 3a to 3c, the second temperature sensor 23 includes a protective box 25 housing the thermistor. The protective housing 25 is advantageously made at least in part from a metallic material resistant to high temperatures and of very good thermal conduction. Mention may be made, by way of nonlimiting example and in a non-exhaustive manner, of metallic materials with thermal conductivity greater than 50W.ni 1 .K 1 , preferably of the order of lOOW.m ^ K ' 1 to 300W.ni' 1 .K ' 1 or even more than 300W.ni' 1 .K ' 1 . These are, for example, metallic materials of the copper or brass type.
    Furthermore, by way of nonlimiting example, each box 25 may also include a fixing system 27 on an external wall of the outlet 11, delimiting the medium whose temperature it is sought to know. Without limitation, it may for example be a clamping system, such as a screwing system, as shown in FIGS. 3a to 3c, or even using a flange fixed on the outlet box 4.
    It is also possible to provide a connection terminal 29 for the connection between the electrical wires connected to the thermistor and electrical wires 31, 33 (see FIG. 2) allowing the electrical information to be conveyed to the control module 15.
    As a variant, the second temperature sensor 23 can be molded directly on the heater 1, more precisely on the outlet box 4 nearby or directly on the outlet pipe IL In this case, the thermistor 231 and the wires 232 of the second sensor 23 shown in Figures 4 and 5, can be molded directly on the outlet box 4, for example directly on or near the outlet pipe 11, without requiring a protective box 25 as described above with reference to the figures 3a to 3c.
    -12In addition, one can provide both a single layer of insulation 233 (Figure 4) as a double layer of insulation 234 (Figure 5).
    Referring again to FIG. 2, the control module 15 can receive information representative of the temperatures T21 and T23 measured respectively by the first temperature sensor 21 and by the second temperature sensor 23. The control module 15 can besides controlling the supply and modifying the control of the heating element (s) 13 as a function of the heating setpoint C and of the temperatures T21 and T23 measured respectively by the first temperature sensor 21 and by the second temperature sensor 23.
    More specifically, the control module 15 can adapt the control of the heating element 13 as a function of the temperature information T21 and T23 measured by the first and second temperature sensors 21, 23, so as to regulate the temperature of the liquid. This temperature regulation is then carried out within the heating device 1, and no longer at the level of the central unit (not shown) of the motor vehicle having transmitted the heating instruction C.
    To do this, each first temperature sensor 21 and each second sensor 23 may comprise at least one means of transmission to the control module 15 of information representative of the resistance of the thermistor and therefore of the temperature T21, T23 measured. In the example described, each temperature sensor 21, 23, in particular their thermistor, is connected to at least one processing means of the control module 15, via the electrical wires shown diagrammatically by the arrows 31 and 33. These electrical wires allow to send electrical information representative of the resistance of the thermistor and therefore of the temperature T21, T23 measured by the thermistors of the temperature sensors 21, 23.
    The control module 15 therefore comprises at least one processing means configured to use information from the temperature sensors 21 and 23, and to generate a command for the heating element as a function of the temperature information, so as to regulate the temperature of the fluid within the heater 1.
    More specifically, the control module 15 comprises at least one means of
    Processing to receive and use a measurement signal from the first temperature sensor 21. It may be a means of processing the control circuit 19 of the control module 15. The first temperature sensor 21, in particular its thermistor is connected via the electrical wires shown diagrammatically by the arrow 31 to the processing means of the control circuit 19. The processing means can detect an event or more particularly a fault, such as overheating of the heating element 13, from this information. For example, in the event of excessive temperature or overheating detected, the control circuit 19 comprises at least one processing means for sending a signal for deactivation of the heating element 13 in fault, that is to say here in overheating, to the corresponding power switch 17.
    In addition, the control module 15 comprises at least one processing means for receiving and exploiting a measurement signal coming from the second temperature sensor 23. The second temperature sensor 23, in particular its thermistor, is connected via the electrical wires shown schematically by arrow 33 to this processing means. It may especially be a means for processing a comparator 35 of the control module 15. In this case, the heating instruction C can be received on a first input of the comparator 35 and the electrical information representative of the resistance of the thermistor of the second temperature sensor 23 and therefore of the temperature T23 measured, can be received on a second input of comparator 35 and compared with the heating setpoint C. The first input of comparator 35 can be a positive input, and the second input of comparator 35 can be a negative input.
    The comparator 35 may include at least one means for transmitting the results of this comparison.
    The result of the comparison can be transmitted to at least one means for receiving the control circuit 19. Depending on this comparison result, at least one means for processing the control circuit 19 can determine and generate a control signal and / or supplying the heating element 13.
    In particular, this signal can include at least one piece of electrical power information to be injected into the heating element (s) 13, taking into account the possible difference between the value of the heating setpoint C and the value
    -14 effective temperature of the heat transfer liquid measured at outlet 11 of the heater 1.
    Thus, in the case of PWM control signals, taking into account the temperature information T21 and T23 measured by the first and second temperature sensors 21, 23, the control circuit 19 can, by way of nonlimiting example, play in particular on the modulation rate, on the duty cycle or on the number of heating elements 13 to be activated, so as to be able to reach the heating setpoint at output 11 of the heater 1. In this case, the control signal and / or power supply emitted by the control circuit 19 includes at least PWM pulse width modulation information.
    This modification of the control signals takes place directly within the heater 1 and not at the level of the central unit (not shown) of the motor vehicle.
    Advantageously, in order to optimize the management of the temperature of the heat-transfer liquid, the control circuit 19 can also take account of the thermal inertia, of the thermal capacity and of other characteristics of the heating element or elements 13 or of thermal characteristics of the fluid.
    Second embodiment
    A second embodiment is illustrated in FIGS. 6 and 7. This second embodiment differs from the first embodiment in that the electric heater 1 which has a single inlet or inlet 7 for the heat transfer liquid, has a first outlet 12a and a second separate fluid outlet 12b.
    According to this second embodiment, there is provided for a heating circuit 100, which is shown schematically in FIG. 6, a single and unique member 102, such as a heat diffusion member 102, jointly ensuring the heating and the distribution of the heat of the heat-transfer liquid directed towards a first and a second heat exchangers 103, 104, such as radiators, separate, from the heating circuit 100.
    This makes it possible to regulate, according to two set temperatures Ca and Cb (FIG. 7), two distinct regions of the passenger compartment, for example the left part and the right part of the passenger compartment of the motor vehicle, or the front and rear parts of the vehicle.
    More specifically, the two separate radiators 103 and 104 make it possible to diffuse
    The heat respectively towards the left part and the right part of the passenger compartment of the motor vehicle equipped with this heating circuit 100 (FIG. 6).
    As a variant or in addition, two separate heating loops can be provided, a heating loop allowing heating of the passenger compartment and another loop allowing, for example without limitation, the heating of a heated floor or even the conditioning of a vehicle battery. In this case, the first heat exchanger 103 can be in the first loop and provide heating of the passenger compartment according to a first setpoint Ca, while the second heat exchanger 104 can be in the second loop for example for heating the floor heating. or the conditioning of a battery according to a second setpoint Cb.
    According to this alternative, the two radiators 103 and 104 are not necessarily both dedicated to heating the passenger compartment.
    Each radiator 103, 104 has an input of its own, these inputs being respectively identified by 106 and 107. The outputs of these two radiators 103, 104 can be combined into one and the same output identified by 108.
    The outputs 12a and 12b of the heater 1 are connected respectively to the input 106 and to the input 107 of the radiators 103 and 104.
    The output 108 of the member 102 which joins the outputs of radiators 103 and 104 can in turn be connected to the input 7 of the heater 1. Other components of the circuit not shown, can if necessary be interposed between the output 108 from the radiators and input 7 from the heater 1.
    The heater 1 is configured to heat the coolant it receives at the inlet 7 and to distribute the thermal heating power in a controlled manner, between a part of the liquid which is directed to its first outlet 12a and the other part of the liquid directed to its second outlet 12b. In other words, this heater 1 is capable of delivering heat transfer liquid on the first outlet 12a at a first temperature different from the second temperature of the heat transfer liquid which it delivers at its second outlet 12b.
    In the example of FIG. 7, the heater 1 can comprise, inside the outlet box 4, at least a first and a second heating element 13a and 13b,
    For example by Joule effect, respectively associated with the first and second radiators 103, 104 represented in FIG. 6.
    The first heating element 13a is connected to the first outlet 12a, and is configured to electrically heat, at the first temperature, the part of the heat transfer liquid intended to flow through the first outlet 12a.
    The second heating element 13b is connected to the second outlet 12b, and is configured to electrically heat, at the second temperature, the part of the heat transfer liquid intended to flow through the second outlet 12b.
    According to the second embodiment, in operation of the heater 1, the heat transfer liquid admitted into the inlet box 3 through the inlet 7, engages in two channels (not visible in the figures), so as to form two flows separate liquids. These two liquid flows pass respectively through a heating element 13a or 13b, so as to be reheated differently to the first temperature and to the second temperature different from the first temperature. With reference to FIGS. 6 and 7, the liquid heated by the first heating element 13a is evacuated towards the first outlet 12a to supply the first radiator 103, while the liquid heated by the second heating element 13b is evacuated towards the second outlet 12b to supply the second radiator 104.
    As previously according to the first embodiment, the heater 1 comprises a control module 15.
    This control module 15 supplies the two heating elements 13a, 13b, from the electrical power and the command instructions received on the cables 6 (see FIG. 6).
    In particular, with reference again to FIG. 7, the control module 15 can comprise a control circuit 19 configured to control two supply switches 17a and 17b respectively dedicated to a heating element 13a, 13b associated, so as to supply the two heating elements 13a and 13b with different powers, in accordance with control instructions that the control circuit 19 receives.
    To do this, as many power switches 17a, 17b are provided as there are heating elements 13a, 13b. In this example, two power switches 17a, 17b are provided.
    In addition, a first temperature sensor 21a, 21b is also provided for each heating element 13a, 13b and a second temperature sensor 23a, 23b for each outlet 12a, 12b of fluid.
    The control module 15 can control the supply of the two heating elements 13a, 13b as a function of two heating setpoints Ca, Cb and of the temperatures T2i a , T2ib measured by the first temperature sensors 21a and 21b, and of the temperatures T23 a , T23b, by the second temperature sensors 23a and 23b.
    Similarly to the first embodiment, each first temperature sensor 21a, 21b associated with a heating element 13a, 13b, is connected to at least one processing means, for example of the control circuit 19, configured to receive and operate a measurement signal, via electrical wires shown diagrammatically by arrows 31a, 31b which make it possible to convey electrical information representative of the temperature T2i a , T2ib measured by the first temperature sensors 21a, 21b.
    Likewise, each second temperature sensor 23a, 23b associated with an output 12a, 12b, is connected to at least one processing means for receiving and exploiting a measurement signal. It is for example a means of processing a comparator 35a, 35b associated, via electrical wires shown diagrammatically by the arrows 33a, 33b which make it possible to convey electrical information representative of the temperature T23 a , T23b measured by the second temperature sensors 23a, 23b to the respective comparators 35a, 35b.
    In this case, a first heating instruction Ca can be received on a first input from a first comparator 35a and the electrical information representative of the resistance of the thermistor of the second temperature sensor 23a associated with the first output 12a of the heater 1 and therefore the temperature T23 was measured, may be received at a second input of the first comparator 35a and compared with the first heating temperature Ca.
    As a function of this comparison result, at least one means for processing the control circuit 19 can determine, or adapt a control and / or power supply signal for the first heating element 13a. In particular, this signal may include at least one piece of electrical power information to be injected into the first heating element 13a, taking into account the possible difference between the value of the
    -18 first heating setpoint Ca and the actual value of the temperature of the heat transfer liquid measured at the first outlet 12a of the heater 1.
    Similarly, a second heating instruction Cb can be received on a first input from a second comparator 35b and the electrical information representative of the resistance of the thermistor of the second temperature sensor 23b associated with a second output 12b of the heater 1 and therefore from the measured temperature T23b, can be received on a second input of the second comparator 35b and compared with the second heating setpoint Cb.
    As a function of this comparison result, at least one means for processing the control circuit 19 can determine, or adapt a control and / or supply signal for the second heating element 13b. In particular, this signal can include at least one piece of electrical power information to be injected into the second heating element 13b, taking into account any difference between the value of the second heating setpoint Cb and the actual value of the temperature of the heat transfer liquid measured at the second outlet 12b of the heater 1.
    Thus, the control module 15 can control the supply and modify the control of each heating element 13a, 13b as a function of each heating setpoint Ca, Cb and of the temperatures T2i a , T2ib and T23 a , T23b measured respectively by each first temperature sensor 21a, 21b and by each second temperature sensor 23a, 23b.
    Process
    We will now describe, with reference to FIGS. 2 and 7, a process for managing the temperature of a fluid, such as a heat-transfer liquid, within a heater 1 as described above.
    The method comprises a step of measuring the temperature T21 or T2U, T2ib of each heating element 13 or 13 a, 13b. This step is carried out by each first temperature sensor 21 or 21a, 21b associated with a heating element 13 or 13a, 13b.
    Once the measurement has been made, the method comprises a step of transmitting or transmitting at least one electrical information representative of the temperature of
    -19Γ associated heating element 13 or 13a, 13b to the control module 15.
    The method also includes a step of measuring the temperature of the liquid T23 at the outlet 11 of the heater 1 according to the first embodiment (Figure 2) or T23 a , T23b at each outlet 12a, 12b according to the second mode of realization (figure 7). This measurement can be performed by the second temperature sensor 23 or each second temperature sensor 23 a, 23b.
    This measurement step is followed by a step of transmitting or transmitting at least one electrical item of information representative of the temperature of the fluid T23 at output 11 or T23a, T23b at each output 12a, 12b.
    Upon receipt of this information, the control module 15 determines for each heating element 13 or 13a, 13b, a control and / or power supply signal for the heating element 13 or for each heating element 13a, 13b. Such a signal is determined according to the temperature information of the first and second temperature sensors 21 and 23, according to the first embodiment. Or, according to the second embodiment, such a signal is determined on the one hand for the first heating element 13a as a function of the temperature information of the first and second temperature sensors 21a and 23a, and on the other hand for the second element heating 13b according to the temperature information of the first and second temperature sensors 21b and 23b. This regulates the temperature of the liquid within the heater 1.
    Advantageously, the method comprises a step of comparing the temperature T21 or T2i a , T2ib measured by a first sensor 21 or 21a, 21b at a threshold temperature. The selected threshold temperature is representative of an excessive temperature corresponding to overheating or liable to lead to overheating of the associated heating element 13, 13a, 13b.
    Preferably, the method comprises a step of comparing the temperature T23 measured by a second sensor 23 with the heating setpoint C according to the first embodiment. In a heater 1 according to the second embodiment, the method comprises a step of comparing the temperature T23 a , respectively T23b, measured by a second sensor 23a, respectively 23b, with the associated heating setpoint Ca, respectively Cb.
    Furthermore, the method may include a step in which the module
    -20 control 15, of the heater 1 according to one or the other of the embodiments, determines which heating element 13; 13 a, 13b to be activated according to the temperature information of the first and second temperature sensors 21, 23 or 21a, 23 a and 21b, 23b. Finally, the microcontroller of the control module 15 can control each power switch 17; 17a, 17b so as to activate or deactivate the heating element 13; 13a, 13b associated.
    Of course, the order of at least certain steps of this process can be reversed.
    Thus, with one or more second temperature sensors 23; 23a, 23b at the outlet 11 or at each outlet 12a, 12b of the heater 1, the setpoint C; Ca, Cb will be the objective to be reached and as a function of the temperature of the liquid measured at the or each outlet 11; 12a, 12b of the heater 1, the control of each heating element 13; 13a, 13b will be adapted and controlled directly by the control module 15 of the heater 1.
    This simplifies the management of the heating of the heat transfer liquid for the automobile manufacturer.
    In addition, this information is correlated with temperature information measured by one or more first temperature sensors 21; 21a, 21b so as to limit the risks of overheating
    In the present, embodiments of electric heating devices 1 have been described which are intended to be connected to a heating circuit for heat transfer liquid such as water for heating the passenger compartment of an electric or hybrid vehicle. Of course, the electric heating device 1 according to the invention can be connected to any other loop or any other heating and / or air conditioning device of a motor vehicle.
    权利要求:
    Claims (15)
    [1" id="c-fr-0001]
    1. Electric fluid heating device (1) for a motor vehicle, comprising:
    at least one fluid inlet (7), at least one fluid outlet (11; 12a, 12b), at least one heating element (13; 13a, 13b) for electrically heating the fluid, at least a first temperature sensor (21; 21a, 21b) arranged to measure the temperature of said at least one heating element (13; 13 a, 13b), and a control module (15) of said at least one heating element (13; 13a, 13b) , characterized in that:
    said device (1) further comprises at least a second temperature sensor (23; 23a, 23b) arranged so as to measure the temperature of the fluid at said at least one outlet (11; 12a, 12b) of said device ( 1), and in that the control module (15) comprises at least one processing means (17; 17a, 17b, 19, 35; 35a, 35b) for:
    • use the temperature information (T21; T2U, T2H ,, T23; T23 a , T23b) of the first (21; 21a, 21b) and second (23; 23a, 23b) temperature sensors, and to • generate a command from said at least one heating element (13; 13 a, 13b) according to the temperature information (T21; T2U, T2H ,, T23; T23 a , T23b) of the first (21; 21a, 21b) and second (23; 23a, 23b) temperature sensors, so as to regulate the temperature of the fluid within the heating device (1).
    [2" id="c-fr-0002]
    2. Device (1) according to claim 1, wherein said at least one second temperature sensor (23; 23a, 23b) is molded on said device (1).
    [3" id="c-fr-0003]
    3. Device (1) according to any one of the preceding claims, in which at least one temperature sensor (21; 21a, 21b; 23; 23a, 23b) comprises a temperature-sensitive element (231).
    -224. Device (1) according to claim 3, in which the temperature-sensitive element (231) of said at least one second temperature sensor (23; 23 a, 23b) is arranged so as to be immersed in the operating fluid of said device (1).
    [4" id="c-fr-0004]
    5. Device (1) according to one of claims 3 or 4, wherein the temperature-sensitive element (231) is a thermistor with negative temperature coefficient.
    [5" id="c-fr-0005]
    6. Device (1) according to one of claims 3 to 5, in which the temperature sensitive element of said at least one temperature sensor (21; 21a, 21b; 23; 23a, 23b) is electrically connected to the module control (15).
    [6" id="c-fr-0006]
    7. Device (1) according to claim 6, in which the control module (15) comprises at least one comparator (35; 35a, 35b) configured for:
    receiving at a first input a heating setpoint (C; Ca, Cb) and for receiving at a second input electrical information representative of the temperature (T23; T23a, T23b) of the fluid at said at least one output (11; 12a, 12b) measured by said at least one second temperature sensor (23; 23a, 23b).
    [7" id="c-fr-0007]
    8. Device (1) according to claim 7, in which the comparator (35; 35a, 35b) is configured to compare the electrical information representative of the temperature (T23; T23a, T23b) of the fluid with the heating setpoint (C ; Ca, Cb).
    [8" id="c-fr-0008]
    9. Device (1) according to claim 8, in which at least one processing means (19) of the control module (15) is configured to determine a control and / or supply signal of said at least one heating element ( 13; 13a, 13b) as a function of the result of the comparison between the electrical information representative of the temperature (T23; T23 a , T23D of the fluid at the heating setpoint (C; Ca, Cb).
    [9" id="c-fr-0009]
    10. Device (1) according to any one of the preceding claims, comprising:
    a first fluid outlet (12a), a second fluid outlet (12b), a first heating element (13a) connected to the first fluid outlet (12a), configured to electrically heat, at a first temperature, part of the
    -23 heat transfer liquid intended to flow through the first outlet (12a), a second heating element (13b) connected to the second outlet (12b) of fluid, configured to heat electrically, to a second temperature different from the first temperature, another part of the heat transfer liquid intended to flow through the second outlet (12b), for each heating element, a first associated temperature sensor arranged so as to measure the temperature of the associated heating element, and for each outlet fluid (12a, 12b), a second associated temperature sensor (23a, 23b) arranged so as to measure the temperature of the fluid at the associated outlet 12a, 12b).
    [10" id="c-fr-0010]
    11. Heating circuit (100) of a vehicle interior, characterized in that it comprises at least one electric heating device (1) according to any one of the preceding claims.
    [11" id="c-fr-0011]
    12. A heating circuit (100) according to claim 11, wherein the heating device (1) conforms to claim 11, said circuit (100) further comprising at least first and second heat exchangers (103, 104 ) configured to diffuse heat to two distinct regions of the passenger compartment of the vehicle, and in which the first fluid outlet (12a) of said device (1) is connected to the first heat exchanger (103), and the second outlet (12b ) of fluid from said device (1) is connected to the second heat exchanger (104).
    [12" id="c-fr-0012]
    13. A method for managing the temperature of a fluid within an electric heating device (1) according to any one of claims 1 to 10, characterized in that said method comprises the following steps:
    each first temperature sensor (21; 21a, 21b) measures the temperature (T21; T2ia, T21D of an associated heating element (13; 13a, 13b), each first temperature sensor (21; 21a, 21b) emits at least electrical information representative of the temperature (T21; T2U, T21D of the associated heating element (13; 13a, 13b) at the control module (15), each second temperature sensor (23; 23 a, 23b) measures the temperature fluid (T23; T23a, T23b) at at least one outlet (11; 12a, 12b) associated with said device (1),
    Each second temperature sensor (23; 23 a, 23b) emits at least one electrical information item, representative of the temperature of the fluid (T23; T23a, T23b) at said at least one output (11; 12a, 12b) of said device ( 1), to the control module (15),
    5 - the control module (15) determines for each heating element (13; 13a,
    13b), a signal for controlling and / or supplying the heating element (13; 13a, 13b) as a function of the temperature information (T21; T2U, T2ib, T23; T23 a , T23b) of the first (21; 21a, 21b) and second (23; 23a, 23b) temperature sensors, so as to regulate the temperature of the fluid within the device
    10 heating (1).
    [13" id="c-fr-0013]
    14. The temperature management method according to claim 13, comprising a step in which the control module (15) determines which heating element (13; 13a, 13b) must be activated according to the temperature information (T21; T2U, T2ib, T23; T23a, T23b) of the first (21; 21a, 21b) and second (23; 23a, 23b)
    [14" id="c-fr-0014]
    15 temperature sensors.
    15. The method of temperature management according to claim 14, in which the control module (15) comprises at least one microcontroller and at least one power switch for each heating element (13; 13a, 13b), and in which the microcontroller controls each power switch (17; 17a,
    [15" id="c-fr-0015]
    20 17b) so as to activate or deactivate the associated heating element (13; 13a, 13b).
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    同族专利:
    公开号 | 公开日
    FR3062601B1|2019-06-07|
    JP2020507190A|2020-03-05|
    JP6862566B2|2021-04-21|
    EP3577395A1|2019-12-11|
    US20200025411A1|2020-01-23|
    EP3577395B1|2021-02-17|
    CN110268206A|2019-09-20|
    WO2018142064A1|2018-08-09|
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    法律状态:
    2018-02-26| PLFP| Fee payment|Year of fee payment: 2 |
    2018-08-10| PLSC| Search report ready|Effective date: 20180810 |
    2019-02-28| PLFP| Fee payment|Year of fee payment: 3 |
    2020-02-28| PLFP| Fee payment|Year of fee payment: 4 |
    2021-02-26| PLFP| Fee payment|Year of fee payment: 5 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1750960A|FR3062601B1|2017-02-06|2017-02-06|ELECTRICAL HEATING DEVICE, HEATING CIRCUIT, AND CORRESPONDING TEMPERATURE MANAGEMENT METHOD|
    FR1750960|2017-02-06|FR1750960A| FR3062601B1|2017-02-06|2017-02-06|ELECTRICAL HEATING DEVICE, HEATING CIRCUIT, AND CORRESPONDING TEMPERATURE MANAGEMENT METHOD|
    US16/483,537| US20200025411A1|2017-02-06|2018-01-31|Electric heating device, corresponding heating circuit and method for managing the temperature|
    JP2019542411A| JP6862566B2|2017-02-06|2018-01-31|Electric heating device, corresponding heating circuit, and temperature control method|
    EP18705697.3A| EP3577395B1|2017-02-06|2018-01-31|Electric heating arrangement, heating circuit and method of control of the corresponding temperatures|
    PCT/FR2018/050221| WO2018142064A1|2017-02-06|2018-01-31|Electric heating device, corresponding heating circuit and method for managing the temperature|
    CN201880010511.8A| CN110268206A|2017-02-06|2018-01-31|Electric heater unit, corresponding heating circuit and the method for managing temperature|
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