阅读说明：本技术 用于加热机动车辆的传热流体的电装置 (Electrical device for heating a heat transfer fluid of a motor vehicle ) 是由 F.皮埃隆 L.泰利尔 于 2018-11-26 设计创作，主要内容包括：本发明涉及一种用于机动车辆的传热流体的电加热装置,至少包括：加热模块；壳体；以及至少部分地界定用于引导传热流体的至少两个回路；其特征在于,加热模块至少部分地在所述两个引导回路中延伸。(The invention relates to an electric heating device for a heat transfer fluid of a motor vehicle, comprising at least: a heating module; a housing; and at least partially defining at least two circuits for conducting a heat transfer fluid; characterized in that the heating module extends at least partially in the two guide circuits.)

1. An electric heating device (2) of a heat transfer fluid for a motor vehicle, comprising at least:

-a heating module (3);

-a housing (4); and

-at least partially defining at least two circuits (5 a; 5b) for conducting a heat transfer fluid;

it is characterized in that the preparation method is characterized in that,

-the heating module (3) extends at least partially in the two guide circuits (5 a; 5 b).

2. The device as claimed in claim 1, characterized in that the heating module (3) further extends between two guide circuits (5 a; 5 b).

3. The device according to claim 1 or 2, characterized in that said two guiding circuits (5 a; 5b) are further defined by a core (9 a; 9b) able to guide the flow of heat transfer fluid in the vicinity of the heating module (3).

4. A device according to claim 3, characterised in that the heating module (3) is wound on the core (9 a; 9 b).

5. A device according to claim 3 or 4, characterized in that the core (9 a; 9b) comprises spacers (11) arranged on at least a part of the surface of the core (9 a; 9 b).

6. Device according to any one of the preceding claims, characterized in that the heating module (3) is made in the form of a tubular heating body.

7. Device according to any of the preceding claims, characterized in that the heating module (3) is made in the form of a shielded resistor.

8. The device according to any one of the preceding claims, wherein the housing (4) comprises:

-a distribution chamber (8) in which a heat transfer fluid inlet (6) for a heat transfer fluid is formed, said distribution chamber (8) being able to distribute the heat transfer fluid in two guiding circuits (5 a; 5 b); and

-a body (13) in which the two guide circuits (5 a; 5b) are at least partially defined.

9. The device according to claim 8, characterized in that the distribution chamber (8) comprises a distributor (17) able to selectively distribute the heat transfer fluid to the two guide circuits (5 a; 5 b).

10. Device according to any one of claims 8 and 9, characterized in that a partition (16) extends from the wall of the distribution chamber (8) towards the opposite end of the body (13), said body (13) comprising a shape capable of at least partially housing said partition (16) of the distribution chamber (8).

Technical Field

The invention relates to an electric device for heating at least one heat transfer fluid of a motor vehicle.

Background

In general, the heating of the air for heating the passenger compartment of the motor vehicle and/or even allowing demisting or defrosting is ensured by passing an air flow through a heat exchanger, more particularly by heat exchange between the air flow and a heat transfer fluid circulating in the heat exchanger. It is usually the coolant in the circuit of the heat engine of the motor vehicle.

In the case of an electric vehicle, the heating function is no longer performed by circulation of the engine coolant in the heat exchanger of the ventilation, heating and/or air conditioning device, since the vehicle does not have a thermally driven engine. In this case, an autonomous hot water circuit may be provided to heat the passenger compartment.

However, such heating by means of an autonomous hot water circuit may prove to be unsuitable or insufficient to guarantee a quick and effective heating of the vehicle passenger compartment, in particular to ensure heating of the passenger compartment or defrosting or demisting when starting the vehicle in a very cold environment, or when the temperature of the heat transfer fluid or of the air blown into the vehicle passenger compartment needs to be raised very quickly.

Furthermore, in order to reduce the size and costs due to the additional water circuit, it is also known for electric vehicles to use an air-conditioning circuit operating in heat pump mode. Thus, in such a case, an air conditioning circuit that cools the air stream using a refrigerant fluid may be conventionally used to heat the air stream. For this purpose, the evaporator in the air-conditioning circuit can be used as a condenser.

However, such heating modes may still prove unsuitable or inadequate. In fact, in the heat pump mode, the performance of the air conditioning circuit depends on the external climatic conditions, for example when the temperature of the external air is too low, for example lower than 5 ℃.

In order to overcome these drawbacks of the prior art, known solutions comprise adding to the heat exchanger or to the heat transfer fluid circuit or even to the air conditioning circuit an electric device for the thermal conditioning of the fluid, such as an electric device for heating the heat transfer fluid.

Disclosure of Invention

The object of the present invention is to propose an electric heating device for a heat transfer fluid in a motor vehicle which is simple and compact to manufacture and assemble.

To this end, the invention relates to an electric heating device for a heat transfer fluid of a motor vehicle, comprising at least:

-a heating module;

-a housing; and

-at least partially defining at least two circuits for guiding a heat transfer fluid;

it is characterized in that the preparation method is characterized in that,

-a heating module extends at least partially in the two guide circuits.

Thus, the single heating module allows efficient heat transfer to the heat transfer fluid circulating in the two guiding circuits independently and in the same direction. This simplifies the construction and assembly of the device. In particular, the number of electrical connections may be limited to the number strictly required to supply and control a single heating module. Generally, the device according to the invention is more compact, while limiting the pressure drop in the device.

The electrical heating device may also include one or more of the following features, used alone or in combination:

the two guiding circuits are parallel. This configuration makes it possible to minimize the volume of the device and the pressure drop over the fluid;

two guiding circuits delimit a cylindrical inner volume. This configuration makes it possible to minimize the pressure drop over the fluid and the volume of the device;

the heating module further extends between the two guide circuits;

the heating module comprises a first main portion extending in the guide circuit, a second main portion extending in the other guide circuit and an intermediate portion connecting the first and second portions;

the heating module extends in two guide circuits, forming a coil;

the heating module comprises two power plugs;

the two guiding circuits are further defined by a core able to guide the flow of heat transfer fluid in proximity to the heating module;

-the core is cylindrical;

-a heating module wrapped on the core;

the housing comprises two electrical connectors capable of guiding two power plugs out of the housing; the two power plugs are arranged on the same side of the shell;

the core comprises a spacer arranged on at least a part of the surface of the core;

the heating module is made in the form of a tubular heating body, such as a shielded resistor;

-the housing comprises at least one heat transfer fluid inlet and at least one heat transfer fluid outlet;

-the heat transfer fluid inlet and the heat transfer fluid outlet are made in the form of tubes;

the tubes forming the heat-transfer fluid inlet and the heat-transfer fluid outlet extend in parallel on the same plane;

-the housing comprises: a distribution chamber having a heat transfer fluid inlet formed therein, the distribution chamber being capable of distributing heat transfer fluid in two guide circuits; and a body at least partially defining two guide circuits;

-two power plugs are arranged on the distribution chamber; a heat transfer fluid outlet capable of discharging heat transfer fluid from the device is provided in the main body;

the main body comprises lateral stiffening ribs;

an annular member, such as a seal, provides a sealing engagement between the dispensing chamber and the body;

-the heat transfer fluid outlet is arranged near one end of the body;

the partition extends from the wall of the distribution chamber towards the opposite end of the body;

-the body comprises a shape capable of at least partially housing said partition of the dispensing chamber;

the distribution chamber comprises a distributor able to selectively distribute the heat transfer fluid to the two guide circuits.

Drawings

Other characteristics and advantages of the invention will emerge from the following description of non-limiting embodiments, read with reference to the attached drawings:

figure 1 shows an exploded view of an electric heating device according to the invention according to an embodiment;

figure 2 shows an assembled view of the electric heating device;

figure 3 shows a cross-section of a heating device assembled according to the same embodiment.

Detailed Description

The electric heating device 2 according to the invention comprises a heating module 3, a housing 4 in which a heat transfer fluid that has to be heated by the heating module 3 can circulate. The housing 4 can accommodate the heating module 3. The device 2 defines a guide circuit 5a of the heat transfer fluid; 5b, heating module 3 in guide loop 5 a; 5b, respectively. Therefore, the housing 4 is obviously comprised in the guide circuit 5 a; 5b and at least partially define a guide circuit 5 a; 5 b.

According to the described embodiment, the heating module 3 passes through each guiding circuit 5 a; 5 b. In other words, when the heat transfer fluid circulates in the electric heating device 2, the heating module 3 is wetted over its entire circumference by the heat transfer fluid. The arrows in fig. 3 schematically represent the trajectory of the heat transfer fluid in the electric heating device 2 according to the embodiment.

According to the same embodiment, the guiding circuit 5 a; 5b are parallel and define a cylindrical internal volume. This configuration makes it possible to minimize the pressure drop over the fluid and the volume of the device 2.

The heat transfer fluid to be heated can for example come from a glycol water circuit, if relevant from a cooling circuit of the motor vehicle.

According to a preferred feature of the invention, the casing comprises a heat transfer fluid inlet 6, a heat transfer fluid outlet 7 and a distribution chamber 8 designed to distribute the heat transfer fluid in the pilot circuit 5 a; 5 b. The heat transfer fluid enters through the heat transfer fluid inlet 6 and passes through the distribution chamber 8. The heat transfer fluid is then divided into two flows, each flow being directed to one of the directing circuits 5 a; 5b so as to be heated. The heated heat transfer fluid is then removed through the heat transfer fluid outlet 7.

The arrows in and out of the figure schematically represent the heat transfer fluid entering and leaving the device 3, respectively, according to the described embodiment.

In a particular embodiment, in addition to the distribution chamber 8, the casing 4 comprises a main body 13 in which the first and second guide circuits 5a, 5b are at least partially defined. According to this embodiment, the dispensing chamber 8 covers the upper part of the body 13, forming a lid.

According to the embodiment described, the annular member 14 provides a sealing joint between the distribution chamber 8 and the body 13; and the body 13 includes transverse reinforcing ribs 113. In this embodiment, the annular member 14 is a seal.

According to a particular embodiment, an inlet for the heat transfer fluid 6 is provided in the distribution chamber 8 in the form of an inlet pipe 6a, while an outlet for the heat transfer fluid 7 is provided in the body 13 in the form of an outlet pipe 7a, in the vicinity of one end of said body 13. Thus, the inlet pipe 6a is fluidly connected to the dispensing chamber 8, while the outlet pipe 7a is fluidly connected to the guiding circuit 5 a; 5b, and (5 b). According to the described embodiment, the inlet pipe 6a and the outlet pipe 7a extend in parallel on the same plane.

According to the embodiment described, the distribution chamber 8 comprises a first enlarged portion substantially aligned with the first guide circuit 5 a. The inlet duct 6a opens into a first enlarged portion of the distribution chamber 8. The distribution chamber 8 further comprises a second thinned portion extending between the first guide circuit 5a and the second guide circuit 5 b. Therefore, the flow cross section of the heat transfer fluid is reduced between the first and second guide circuits 5a and 5 b. The distribution chamber 8 finally comprises a third cylindrical portion aligned on the second guide circuit 5 b.

In an embodiment not shown, the means for controlling the heating module 3 may be arranged below the dispensing chamber 8. The control means may for example take the form of printed circuits of the PCB (printed circuit board) type, thus controlling the electrical supply of the heating module 3. By arranging the control means below the distribution chamber 8 in this way, the electronic components of the control means, which are thermally coupled to the distribution chamber 8, can be cooled by the heat transfer fluid to be heated, which enters the device 2 through the distribution chamber 8.

According to a preferred feature of the invention, the housing 4 includes an electrical connector 15 a; 15b capable of guiding the power plug 103 a; 103b out of the housing 4.

According to the described embodiment, the power plug 103 a; 103b are arranged on the same side of the housing 4 on the dispensing chamber 8.

According to a preferred feature of the invention, the heating module 3 is mounted on the guide circuit 5 a; 5b, forming a coil. The term coil includes any tube wound in a spiral, helix, winding, twist, volute, or any other shape that combines translation along an axis and rotation about the same axis. The heating module 3 therefore extends in the form of an open loop (otherwise referred to as a turn). This spatial configuration makes it possible to increase the length of the heating module 3 accommodated in the housing. Thus, the heating module 3 takes up more space in the device, so that the heating power transferred to the heat transfer fluid can be increased.

According to the described embodiment, the heating module 3 is made in the form of a tubular heating body, such as a shielded resistor.

According to a preferred feature, the tubular heating body is in one piece.

According to a preferred feature of the invention, the guide circuit 5 a; 5b are defined, in addition to the device 2, by at least one core 9 a; 9b are defined. The core according to the invention is able to direct the flow of heat transfer fluid in the vicinity of the heating module 3, the core 9 a; 9b for example form a cylinder.

According to the described embodiment, two guiding circuits 5 a; 5b are formed by a core 9 a; 9b are defined. According to the described embodiment, the cylindrical core 9 a; 9b are arranged substantially in the loop defined by the guide circuit 5 a; 5b, the wall of which delimits the center of the cylindrical inner space. Thus, the core 9 a; 9b form a rotating cylinder delimited by a first circular base opposite the dispensing chamber 8, a second circular base at the other end of the cylinder and by lateral surfaces. Thus, the core 9 a; 9b and the guide circuit 5 a; 5b together ensure the circulation of a 1 to 2mm sheet of water around the periphery of the heating module 3.

It is of course conceivable for the guide circuit 5 a; 5b are not defined by the core 9 a; 9b, but only by the guiding circuit 5 a; 5 b. According to the invention, the core 9 a; 9b may comprise at least one flow director 10, for example arranged at said core 9 a; 9b on the first circular base.

The flow director 10 is preferably arranged to direct flow from the core 9 a; 9b in the form of a first circular base-extending fin or vane.

According to the described embodiment, the flow director 10 is mounted on the cylindrical core 9 a; 9b, face-to-face about the periphery and about the cylindrical core 9 a; 9b are arranged symmetrically with respect to the center of rotation. In this embodiment, the main function of the flow director 10 is to ensure that the core 9 a; 9b in the guide circuit 5 a; 5b, in the manner of spacers, with the walls of the distribution chamber 8. They also make it possible, due to their fin or blade shape, to guide the flow in the circuit 5 a; 5b and rotates the fluid.

According to a preferred feature of the invention, the core 9 a; 9b comprise spacers 11 extending from the core 9 a; 9b, the spacers 11 being able to be positioned between the heating module 3 and the core 9 a; 9b are kept at a distance from each other.

In the embodiment depicted, the spacer 11 surrounds the core 9 a; 9b, the periphery of the lateral surface of which extends radially, parallel to the cylindrical core 9 a; 9b and extends axially from the first circular base to, for example, a distance smaller than the cylindrical core 9a from the first circular base; 9b, height of the sensor. Here, the spacers 11 are made in the form of ribs.

In this embodiment, the heating module 3 comprises portions supported by said spacers 11, said supported portions being separated from each other by unsupported portions.

According to a preferred feature of the invention, the core 9 a; 9b forms a relief.

In the embodiment shown in fig. 1, 2 and 3, the cone 12 extends from the core 9 a; 9b extends centrally of the first circular base. The cone 12 has a concave parabolic guiding curve in the continuity of said first circular base. The axis of rotation of the cone 12 and the cylindrical core 9 a; the axes of rotation of 9b coincide.

Further, in the described embodiment, the core 9 a; 9b are hollow and the second circular base is perforated.

According to a preferred feature of the invention, the heating module 3 extends from a first end of the module constituted by the first power plug 103a, through the distribution chamber 8 and, at the guide circuit 5 a; 5b, respectively. The heating module 3 therefore comprises a first main portion, on which the heating module 3 extends from the first power plug 103a through the distribution chamber 8 and through the guide circuit 5 a; 5b, and (5 b).

According to this same embodiment, the heating module 3 comprises an intermediate portion on which the heating module 3 is mounted on the guide circuit 5 a; 5b extend transversely.

According to this same embodiment, the heating module 3 is in another guide circuit 5 a; 5b, respectively. Thus, the heating module 3 comprises a second main portion, on which the heating module 3 extends from the intermediate portion through said further guide circuit 5 a; 5b and through the distribution chamber 8 to the second end of the module constituted by the second power plug 103 b.

According to the described embodiment, the heating module 3 extends in the housing 4 in the form of a U comprising: two main portions parallel to each other, which respectively surround the core 9 a; 9b are wound around the guide loop 5 a; 5 b; and a middle portion forming a base of the U, extending between the two parallel main portions of the U.

Advantageously, as shown in fig. 1, the heating module 3 extends between the parallel main portions in a rectilinear manner on its intermediate portion in the extension of the turns extending between said intermediate portions. Therefore, the heating module 3 does not form any bend on the intermediate portion, which makes it possible to limit the pressure drop over the fluid.

According to a preferred feature, the partition 16 extends from the wall of the distribution chamber 8 towards the opposite end of the body 13 of the casing 4.

According to the embodiment described, the partition 16 takes the form of a tongue extending from the wall of the dispensing chamber 8 towards the opposite end of the body 13. The body 13 of the casing 4 comprises a shape capable of at least partially housing the partition 16 of the dispensing chamber 8. Thus, the partition 16, by complementarity of shape, at least partially delimits the two guide circuits 5 a; 5b to engage with the body 13.

This feature makes it possible to facilitate the assembly of the various elements included in the device 2 and, in particular, to adapt the method of mounting the device 2 to the constraints imposed by the spatial configuration of the heating module 3 according to the invention.

According to the invention, the distribution chamber 8 comprises a distributor 17 able to direct the heat transfer fluid towards the guide circuit 5 a; 5b are selectively assigned. The distributor 17 allows the heat transfer fluid to be uniformly directed towards the guiding circuit 5 a; 5b to ensure that, at each guide circuit 5 a; 5b, equal heat transfer fluid flow. This makes it possible to avoid excessive temperature differences between different points on the surface of the module 3.

According to the described embodiment, the distributor 17 is aligned on the first guide circuit 5 a. Thus, the distributor 17 is arranged in an enlarged portion of the distribution chamber 8.

The distributor 17 takes the form in particular of a plate arranged in a horizontal plane parallel to the cross section of the first guide circuit 5 a. The plate is perforated with the holes aligned with the first guide loops 5 a. The inclined wall extends vertically from the distributor plate 17 along a part of the periphery of the aperture. The inclined wall is bounded on the periphery by first and second vertical edges. The first edge is arranged at a point around the periphery of the hole closest to the heat transfer fluid inlet 6. In addition, an additional wall extends from said cylindrical wall in a direction substantially opposite to the direction of the inlet pipe 6a, at a point substantially diametrically opposite to the first edge.

It should be understood that the exemplary embodiments are given by way of illustration of the subject matter of the present invention. The invention is not limited to the above-described embodiments, which are provided by way of example only. It covers various modifications, alternatives, and other variations that may be contemplated by those skilled in the art within the scope of the invention.