FR3077775A1 - PULSE CONTROL MODULE AND HEATING PLANT AND / OR VENTILATION AND / OR AIR CONDITIONING THEREFOR - Google Patents

Abstract

The invention relates to a control module (15) for a blower for installation (1) for heating and / or ventilation and / or air conditioning, in particular for a motor vehicle, the blower being configured to generate an airflow able to circulate in a vehicle. a channel (2) for circulating said installation (1). The control module (15) is configured to drive the blower and comprises at least one active power electronic component (153) and a heat sink (157) arranged in thermal contact with the at least one active power electronic component (153). . According to the invention, the heat sink (157) delimits a housing (156) to at least partially receive said at least one electronic active power component (153), and is configured to be arranged on said installation (1) so the housing (156) receiving said at least one electronic active power component (153) extends at least partly in the circulation channel (2). The invention also relates to a heating installation (1) and / or ventilation and / or corresponding air conditioning.

Description

The invention is in the field of ventilation, heating and / or air conditioning systems, in particular for a motor vehicle. The invention relates in particular to a module for controlling a blower for such an installation.

Heating and / or ventilation and / or air conditioning systems for motor vehicles, also known by the English name HVAC (for Heating, Ventilation and Air-Conditioning) allow air to be distributed in a passenger compartment of the vehicle and generally include a duct air in which are arranged various means of thermal air treatment. The air heat treatment means are in particular heat exchangers, for heating and / or cooling, for example an air heating radiator and an evaporator intended to cool the air.

The air flow circulating in the heating and / or ventilation and / or air conditioning installation is generated by a motor-fan unit, also called a blower or air blower, which is mounted at a volute of the installation ensuring the channeling of the air flow. The air flow is directed, via the blower, to one or more exits of the installation opening into the passenger compartment, after being heat treated.

The blower includes in particular a fan wheel or turbine housed in the volute to generate a flow of air therein, and an electric drive motor capable of rotating the fan wheel. Conventionally, the blower, and more specifically the drive motor, is controlled by a control module. The control module makes it possible in particular to vary the speed of the motor as required and for this purpose comprises components, more particularly electrical and electronic components, including electronic power components, in particular active electronic power components. One can cite for example semiconductors such as diodes, transistors, in particular insulated gate field effect transistors known by the acronym MOSEET for "Metal Oxide Semiconductor Eield Effect Transistor". In contrast to passive components which cannot introduce energy into the circuit to which they belong and which cannot be modified, active components can change their state and lead or block energy.

One problem is the cooling of the control module. Indeed, in

-2 operation the temperature of the control module may rise and if it exceeds a predefined maximum temperature it may damage certain elements of the control module such as the electronic power components or a printed circuit board electrically connected to these.

To dissipate the heat generated by the control module, it is known to associate it with a heat sink or heat dissipation radiator. The heat sink generally has fins which are arranged to be exposed to the air flow generated in the volute. For this purpose, the heat sink is generally placed at the outlet of the volute.

However, with such a solution, the heat generated by the components of the control module may not be dissipated well enough. In addition, the fins of the heat sink generate a material cost.

The object of the invention is to ensure effective cooling of the components of the control module, in particular of the active power electronic components, while reducing the electrical connections, the space requirement.

To this end, the subject of the invention is a control module for a blower for heating and / or ventilation and / or air conditioning installation, in particular for a motor vehicle, the blower being configured to generate a flow of air capable of circulating in a circulation channel of said installation, and the control module being configured to control the blower and comprises:

at least one active power electronic component, and a heat sink arranged in thermal contact with said at least one active power electronic component,

According to the invention, the heat sink delimits a housing for at least partially receiving said at least one active electronic power component, and is configured to be arranged on said installation so that the housing receiving said at least one electronic power component active extends at least in part in the circulation channel.

When the control module is mounted on the heating and / or ventilation and / or air conditioning installation, the active power component (s) of the control module, i.e. the component (s) of the control module which heat it

-3plus, which are received in the housing formed by the heat sink, are intended to be exposed at least in part to the air flow generated by the blower. In operation, the air flow generated by the blower licks the part of the heat sink projecting into the air flow circulation channel. This improves the cooling of the control module.

The term “thermal contact” means that said active component is arranged in direct contact with the heat sink, without any intermediary, or is arranged indirectly on the heat sink with the interposition of one or more thermal conductors, so as to allow in either case the conduction of the heat generated by said active component to the heat sink.

Such an arrangement also makes it possible to dispense with the fins intended to be exposed to the air flow as in the solutions of the prior art.

Said module may also include one or more of the following characteristics, taken separately or in combination:

said at least one active power component comprises a semiconductor component;

the semiconductor component is an insulated gate field effect transistor;

the heat sink has a bottom wall on which said at least one active power electronic component is arranged;

the bottom wall is configured to extend at least in part in the circulation channel;

the heat sink has a general shape of a bowl;

the heat sink is metallic;

the bottom wall is configured to be arranged in the circulation channel with a non-zero angle of incidence relative to the general direction of flow of the air flow;

the active power electronic component is arranged in the part of the heat sink configured to be the most introduced inside the channel;

the heat sink has a side wall extending from the bottom wall so as to delimit said housing;

the side wall is configured to protrude inside the channel

-4 according to a direction inclined or perpendicular to the general direction of the air flow; the control module comprises a printed circuit board having a power supply circuit for the blower on which said at least one active power electronic component is mounted;

said card is arranged in the housing of the heat sink;

the control module comprising a printed circuit card having a power supply circuit for the blower to which said at least one active power electronic component is connected by at least one electrical connection member;

said card is offset from the heat sink housing;

the control module comprises at least one member for fixing said at least one electronic power component active in the heat sink;

said at least one fixing member is a screwing member;

said at least one active power electronic component is mounted by force fitting in the housing of the heat sink;

the perimeter of the internal contour of the heat sink is decreasing in a direction of insertion of said at least one active electronic power component in the heat sink;

the heat sink has an internal partition inclined relative to a direction of insertion of said at least one active electronic power component in the heat sink;

the inclined partition has a function of guiding said at least one electronic power component active when it is inserted into the heat sink;

at least the elements of the control module received in the heat sink are coated in a thermal conductive material;

the thermal conductive material is chosen from a thermal gel, polyurethane, silicone, especially epoxy resin.

The invention also relates to a heating and / or ventilation and / or air conditioning installation comprising a blower configured to generate an air flow and delimiting at least one circulation channel for the air flow generated by the blower. Said installation includes less a pulser control module as defined

-5précédemment.

Said installation has a cavity at which the control module is arranged.

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:

FIG. 1 is a schematic view partially in section showing in part a heating and / or ventilation and / or air conditioning installation, in particular for a motor vehicle,

FIG. 2 is a view of a scroll of the installation of FIG. 1 housing an air blower,

FIG. 3 is a diagrammatic representation in section of a control module of the air blower according to a first alternative embodiment arranged in the installation of FIG. 1,

FIG. 4 is a diagrammatic representation in section of a control module of the air blower according to a second alternative embodiment arranged in the installation of FIG. 1,

FIG. 5a is a diagrammatic representation in section of a control module of the air blower according to a third alternative embodiment arranged in the installation of FIG. 1,

- Figure 5b is an exploded view of an active power electronic component before assembly in a heat sink of the control module of Figure 5a, and

- Figure 6 is a schematic sectional representation of a control module of the air blower according to a fourth embodiment arranged in the installation of Figure 1.

In these figures, 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 to a single embodiment. Simple features of different

-6 embodiments can also be combined or interchanged to provide other embodiments.

FIG. 1 schematically shows part of an installation 1 for heating and / or ventilation and / or air conditioning, hereinafter referred to as installation 1, in particular for a motor vehicle.

The installation 1 delimits at least one channel 2 inside which at least one air flow is able to circulate.

Such an installation 1 comprises a motor-fan unit also called a blower or air blower 3 (see FIGS. 1 and 2), capable of generating an air flow.

The installation 1 comprises a volute 5, in which the blower 3 is intended to be mounted, and which ensures the channeling of the air flow generated by the blower 3.

The scroll 5 can have a substantially spiral shape. The volute 5 then has a contour starting with an area called "volute nose" and which evolves to an exit 51.

In operation, the blower 3 makes it possible to direct the air flow to a duct 7 for re-installation 1 which distributes the air flow to the outlet openings opening into the passenger compartment of the vehicle. To do this, the volute outlet 51 is connected to the duct 7.

In the example described, the volute 5 and the duct 7 delimit the circulation channel 2 for the air flow generated by the blower 3.

Furthermore, before opening into the passenger compartment, the air flow can undergo at least one heat treatment, for example it can be heated or cooled. To this end, the installation 1 further comprises one or more heat exchangers 9 arranged in the duct 7 and intended to be traversed by the air flow. These heat exchangers 9 known to those skilled in the art of heating and / or ventilation and / or air conditioning systems are not described in more detail below.

The blower 3 comprises a motor 31 and a wheel 33 also called a fan wheel or a blower wheel, intended to be driven by the motor 31, so as to set the air flow in motion. The motor 31 is configured to drive the fan wheel 33 in rotation about an axis of rotation A.

The fan wheel 33 is housed inside the volute 5. On one of its

-7 sides, the volute 5 has an opening closed by a cover 11 forming a support for the motor 31 to drive the fan wheel 33. The motor 31 and the fan wheel 33 are coaxial.

In the example illustrated, the fan wheel 33 has a generally substantially cylindrical shape, with an open face. The open face is on the side opposite to the cover 11 forming the engine support. This open face is, in the assembled state of the blower 3 in the installation 1, in aeraulic communication with one or more air inlets 11 (see FIG. 1), for example outside air coming from outside the passenger compartment and / or recirculated air from the passenger compartment, installation 1.

The fan wheel 33 is configured to suck in through this open face an air flow as shown diagrammatically by the arrow F1 in FIG. 2, then to evacuate this air flow from the side, that is to say here radially with respect to the axis of rotation A, as shown schematically by the arrows F2 in FIG. 2, when it is driven in rotation. The air sucked in and circulated by the fan wheel 33 is extracted from the volute 5 by the outlet 51.

According to the embodiment shown in FIG. 2, the fan wheel 33 has a part 331 forming a bottom, for example substantially in the shape of a bowl, which is arranged opposite the open face of the fan wheel 33. The fan wheel 33 further comprises a hub 333, for example substantially in the center of the bowl-shaped part 331, for receiving a free end of a drive shaft of the motor 31. The fan wheel 33 may comprise a plurality 335 blades or fins. The blades 335 in this example extend axially from the periphery of the bowl-shaped part 331.

Such a blower 3 is controlled by a control module 15 shown very schematically in FIGS. 2 to 6. More specifically, the control module 15 makes it possible to control the motor 31, for example the speed of rotation of the motor 31.

This control module 15 is arranged in the installation 1, for example at the level of the output 51 of volute 5, as illustrated in FIG. 2. This location is by way of illustration and is not limiting. The control module 15 can be arranged elsewhere in the installation 1, for example on a wall of the duct 7. The location of the control module 15 can be chosen to limit the length of conductive cables

Between the control module 15 and the blower 3. A cavity 14 can be provided on a wall of the outlet 51 of volute 5 or of the duct 7, to receive the control module 15 as shown diagrammatically in FIG. 2 or 3.

Referring to Figures 3 and 4, the control module 15 includes a printed circuit board 151 having a power supply circuit for the blower 3 (not visible in these figures). The printed circuit board 151 is in the form of a plate. The power supply circuit is printed on a large side of the printed circuit board 151.

The control module 15 further comprises one or more electronic components, including at least one electronic power component electrically connected to the electrical supply circuit. In particular, the control module 15 comprises at least one active power electronic component 153, designated hereafter by "active component". In contrast to a so-called passive component, such as a resistor, which does not allow energy to be introduced into the circuit to which it belongs or to increase the power of a signal and which cannot be modified, a component active 153 is an electronic component that increases the power of a signal, can change state and lead or block energy. We can also speak of a controllable component. Most of these include semiconductor components, such as diodes, transistors, in particular insulated gate field effect transistors known by the acronym MOSFET for "Metal Oxide Semiconductor Field Effect Transistor".

The printed circuit board 151 can support the active component 153. By this is meant that the printed circuit board 151 forms a mechanical support for the active component 153. In particular, the active component 153 can rest largely or even entirely on the printed circuit board 151 (as shown schematically in Figure 3). In particular, the active component 153 can rest on a large face of the printed circuit board 151, in particular that having the electrical supply circuit. The active component 153 can be fixed, for example soldered to the printed circuit board 151.

As a variant or in addition, the printed circuit board 151 can support any other electronic power component and / or electrical component of the control module 15.

Alternatively, the active component 153 can be connected by at least one electrical connection member, such as lugs or electrical connection pins 154, to the printed circuit board 151, in particular to the circuit (as shown schematically in FIG. 4). ). Such an electrical connection can also apply to any other electronic power component and / or electrical component of the control module 15. This configuration with the active component 153 remote from the printed circuit board 151, makes it possible to limit the risks of damage to the printed circuit board 151 due to too high a temperature of the active component 153. In fact, the printed circuit board 151 is more limited in temperature than the active component 153. The printed circuit board 151 can reach a maximum temperature of the order of 150 ° C while the active component 153 can reach a maximum temperature greater than 150 ° C, in particular of the order of 175 ° C.

In addition, the printed circuit board 151 is electrically connected to one or more connectors 155 to receive a supply voltage and / or speed control signals from the motor 31 and to supply the necessary power to the motor 31 ( not visible in Figure 4). For the sake of simplicity of the drawings, the electrical connections between the control module 15 and the motor 31 are not shown.

The control module 15 also comprises at least one heat sink 157 (see FIGS. 3 to 6), for dissipating the heat generated in particular by the electronic power components of the control module 15, such as the active component 153.

The heat sink 157 is made of a thermally conductive material. For example, it is a metal part. The heat sink 157 is connected to ground.

The heat sink 157 is arranged in thermal contact with the active component 153. More specifically, the heat sink 157 defines a space or a housing 156 for receiving at least the active component 153. The heat sink 157 forms a support for the active component.

We understand by two elements in "thermal contact", the fact that they are arranged in direct contact with each other, we speak in particular of mechanical contact,

-10without intermediate, or that they are assembled to one another in an indirect way with interposition between these two elements of one or more thermal conductors, so as to allow in one or the other case the conduction of heat between these elements.

In addition, the heat sink 157 is configured to be arranged so as to be licked by the air flow generated by the blower 3, the flow of which is shown diagrammatically by the arrows F2 in FIGS. 3, 4, 5a and 6, in the assembled state of the control module 15 in the installation 1 and in operation of the blower 3.

In other words, the heat sink 157 is configured to be arranged so that the housing 156 receiving the active component 153 extends at least in part in the channel 2 for circulation of the air flow generated by the blower 3. To do this, the heat sink 157 can be mounted at a wall of the duct 7 or of the outlet 51 of volute 5 (also referring to Figures 1 and 2).

The heat sink 157 may have a general shape of a bowl intended to protrude inside the channel 2. The interior of the bowl forms the housing 156 receiving the active component 153.

More specifically, the heat sink 157 has a bottom wall 157a on which the active component 153 is arranged and which extends at least partly in the channel 2 for circulation of the air flow generated by the blower 3. In d ' in other words, in the assembled state of the control module 15 in the installation 1, the bottom wall 157a of the heat sink 17 is intended to be exposed at least in part to the air flow generated by the blower 3.

The heat sink 157 also has a side wall 157b extending from the bottom wall 157a, more precisely from the periphery of the bottom wall 157a. The side wall 157b makes it possible, with the bottom wall 157a, to delimit the housing 156 to receive at least the active component 153.

The side wall 157b also allows the fixing of the heat sink 157 on the installation 1, for example on a wall of the duct 7 or of the outlet 51 of the volute 5. The side wall 157b can be of generally cylindrical shape. In the example of FIG. 4, the side wall 157b may have at its free end a flange bearing against a wall of the installation 1.

The arrangement of the active component 153 on the bottom wall 157a of the heat sink 157 can be done with or without interposition of the printed circuit board 151.

In the example of FIGS. 3 and 6, the printed circuit board 151 is received in the heat sink 157, that is to say that it is arranged in the housing 156. It is more precisely arranged and fixed on the bottom wall 157a of the heat sink 157 by any suitable means, for example by gluing or welding, or even by screwing. In the illustrated configuration, the printed circuit board 151 carries the active component 153. It is possible to envisage a variant (not shown) according to which the printed circuit board 151 and the active component 153 are respectively fixed to the bottom wall 157a of the dissipator thermal 157, the electrical connection being made by at least one electrical connection member (not shown in FIGS. 3 and 6).

As an alternative, as illustrated in FIGS. 4 and 5a, the printed circuit board 151 is not arranged in the housing 156 formed by the heat sink 157. It is therefore offset from this housing 156. In this case, the active component 153 is connected to the circuit card by at least one electrical connection member 154.

In the example of Figure 4, the printed circuit board 151 is arranged to at least partially cover the housing 156 or even close it. The printed circuit board 151 is fixed to one end of the side wall 157b, in particular on the flange formed at the free end of the side wall 157b. This fixing can be done by any suitable means, for example by gluing or welding.

According to another alternative shown diagrammatically in FIG. 5a, the printed circuit board 151 is arranged and fixed on a wall of the installation 1 by covering at least partially the housing 156 for receiving the active component 153 formed by the heat sink 157.

In the examples of Figures 4 and 5a, the printed circuit board 151 is arranged horizontally with reference to the particular arrangement shown in these figures. In other words, the printed circuit board 151 is arranged parallel or almost parallel to the wall of the installation 1. According to an alternative not shown, the printed circuit board 151 can be arranged vertically with reference to the particular arrangement. shown in these figures. In other words, the printed circuit board 151 can be arranged perpendicular or almost perpendicular to the wall of the installation 1. The orientation of the printed circuit board 151 can be adapted according to the space available.

In addition, according to these variants of FIGS. 4 and 5a, the active component 153 is

12 arranged and fixed, by any appropriate means, to the bottom wall 157a of the heat sink 157 without interposition of the printed circuit board 151. By removing the printed circuit board 151 from the housing 156 intended to be exposed to the air flow , the heat dissipation generated by the active component 153 is improved through the heat sink 157 intended to be cooled by the air flow.

By way of nonlimiting example, as shown diagrammatically in FIG. 4, one can provide at least one fixing member 21, such as at least one screwing member, of the active component 153 in the heat sink 157. In this example, the fixing member 21 passes through the bottom wall 157a.

According to another example shown diagrammatically in FIGS. 5a and 5b, the active component 153 is mounted by force fitting in the housing 156 of the heat sink 157. We also speak of force clamping or "press fit" in English.

To do this, the internal contour of the side wall 157b delimiting the housing 156 may have a perimeter which is decreasing in a direction of insertion D of the active component 153 in the heat sink 157. The evolution of the perimeter can be done so progressive to facilitate guiding of the active component 153 when it is inserted into the heat sink 157.

In the example of FIG. 5b, the direction of insertion D is vertical with reference to the arrangement of the elements in this figure. This representation is not limiting, the direction of insertion D can for example be horizontal or be any other direction. In the particular example of FIG. 5b, the perimeter of the internal contour of the side wall 157b decreases from its free end to its end connected to the bottom wall 157a of the heat sink 157.

To do this, the heat sink 157 comprises at least one internal partition 157c inclined relative to the direction of insertion D. This internal partition 157c performs a function of guiding the active component 153 when it is inserted into the heat sink 157. internal partition 157c is in the example of FIGS. 5a, 5b formed on the internal contour of a portion of the side wall 157b.

Furthermore, according to one or other of the variants previously described with reference to FIGS. 3 to 6, a conductive insert thermally arranged in thermal contact with the active component 153 and passing through the heat sink 157. may be provided in addition. example of Figure 4, the fixing member 21 forms

-13 such an insert. In other words, the fastener 21 and the thermally conductive insert are made in one piece.

The thermally conductive insert can pass through the bottom wall 157a or alternatively the side wall 157b. The thermally conductive insert has at least one free part intended to be exposed to the air flow when the control module 15 is arranged on the installation 1 and the air flow generated by the blower 3 circulates in the channel 2 This is in particular a metal insert.

Furthermore, the distance d (see FIGS. 3 to 5a and 6) or depth over which the heat sink 157 extends inside the channel 2 can be adapted so that the active component 153 is more or less in the passage of the air flow.

In the examples shown diagrammatically in FIGS. 3 and 6, the heat sink 157 projects slightly, that is to say engages over a small distance d or depth, in the channel 2 for circulation of the air flow generated by the blower 3.

As a variant, the heat sink 157 can engage over a greater distance d or depth, in the circulation channel 2. For example, as shown diagrammatically in FIGS. 4 and 5a, the active component 153 received in the housing 156 can be entirely inside the channel 2. To do this, it can be provided that the distance d is at least equal to the height of the active component 153 added to the thickness of the bottom wall 157a of the heatsink 157. The term "height" is understood here to mean the dimension of the active component 153 in a direction perpendicular to the general plane defined by the bottom wall 157a of the heatsink thermal 157. With reference to the particular arrangement of the elements in FIG. 4 or 5a, the height of the active component 153 is the vertical dimension.

In addition, the bottom wall 157a of the heat sink 157 can extend in channel 2 with a zero angle of incidence (Figures 3, 4, 5a) or alternatively with a non-zero angle of incidence (Figure 6 ) relative to the general direction of flow of the air flow. As before, the general direction of flow of the air flow generated by the blower 3 is shown diagrammatically by the arrows F2.

When the angle of incidence a is not zero (FIG. 6), the active component 153 can preferably be arranged in the part of the heat sink 157 configured to be the most introduced inside the channel 2, in order to maximize the heat exchange between the active component 153 and the air flow.

-14II follows that the side wall 157b, for example cylindrical, of the heat sink 157 extends at least partially projecting inside the channel 2 in a direction inclined to the general direction of flow of the air flow , when the angle of incidence a is not zero (Figure 6) or perpendicular to the general direction of flow of the air flow when the angle of incidence is zero (Figures 3, 4, 5a). This maximizes the air contact area on the heatsink 157.

In addition, one can provide, as shown schematically in Figures 3 to 6, a heat dissipation sole 158 on which is mounted the active component 153. Such a sole 158 is for example metallic.

According to a variant illustrated in Figure 3 or 6, the heat dissipation sole 158 can be arranged on the printed circuit board 151 and fixed by any suitable means.

According to another variant illustrated in FIGS. 4 and 5a, the heat dissipation sole 158 can be arranged and fixed by any suitable means to the heat sink 157, for example on the bottom wall 157a (FIGS. 4a and 5a) and / or on the side wall 157b (FIG. 5a).

The heat dissipation sole 158 is separate from the heat sink 157. It is therefore another part and / or another material.

In addition, according to the variant with a thermally conductive insert, for example formed by the fixing member 21 in the example of FIG. 4, passing through the heat sink 157, this insert can be in contact with the heat dissipation sole 158.

Furthermore, the control module 15 can be provided with a cover 159 which covers the elements of the control module 15, so as to form a housing, as illustrated in the examples of FIGS. 4 and 5a. The cover 159 can be made of plastic. The cover 159 is for example attached to the wall of the installation 1, in particular of the duct 7 or of the outlet 51 of volute 5, so as to cover all of the elements of the control module 15. Advantageously, the cover 159 has a passage for an outlet from the connector 155. In these examples, the cover 159 is fixed to the wall of the installation 1 by fixing members 23 such as screwing members.

-15Any other assembly variant can be considered. For example, the cover 159 can be clipped or clipped, or even glued to the installation wall 1.

Finally, the control module 15 may include a coating material (not shown in the figures). Such a coating or encapsulation material is known by the name "potting" in English. This coating material covers or envelops the element or elements of the control module 15 which are received in the housing 156 of the heat sink 157, in particular the active component 153.

This coating material can also cover or envelop the element or elements of the control module 15 which are arranged between the heat sink 157 and the cover 159, for example the printed circuit board 151 in the examples of FIGS. 4 and 5a.

Advantageously, the coating material fills the interior volume of the control module 15. Filling with the coating material or "potting" can be facilitated due to the bowl shape of the heat sink 157.

The coating material chosen must be suitable for electronics. In particular, it must be electrically insulating. It is advantageously heat resistant. Furthermore, it is a thermal conductive material. This makes it possible to promote the cooling of the control module 15 by participating in the dissipation of the heat generated by the elements of the control module 15, in particular the electronic power components.

Such a material allows in particular to ensure a seal. In fact, the coating material protects the elements inside the control module 15 from any ingress of water or dust.

The coating material can be chosen from the following materials: thermal gel, thermal paste (for example based on silicone or not comprising metallic particles such as copper or silver), silicone, resin, in particular epoxy , polyurethane, for example two-component polyurethane or else a fluid material when hot and solid when cold. The coating material can therefore be a material capable of changing state. For example, it may be a polyurethane resin which is liquid when filling the interior of the control module 15 and which then hardens.

Thus, at least part of the electronics, in particular the element or elements of the control module 15 which heat the most, such as the active component 153, is arranged in the housing 156 of the heat sink 157 which is intended for 5 be directly arranged in the passage of the air flow in the circulation channel 2 of the installation 1. Thus, the active component 153 dissipates its heat through the heat sink 157 and the air flow, when it circulates, cools this heatsink 157.

Efficient cooling of the control module 15 is obtained due to the arrangement of the heat sink 157 receiving at least the active component 153 10 in the passage of the air flow in the circulation channel 2 of the installation 1.

This solution also makes it possible to use less material compared to the solutions of the prior art of heat sink 157 with cooling fins arranged in the passage of the air flow.

Claims (10)

1. Control module (15) of a blower (3) for installation (1) of heating and / or ventilation and / or air conditioning in particular for a motor vehicle, the blower (3) being configured to generate a suitable air flow to circulate in a circulation channel (2) of said installation (1), and the control module (15) being configured to control the blower (3) and comprises: at least one active power electronic component (153), and a heat sink (157) arranged in thermal contact with said at least one active power electronic component (153), characterized in that the heat sink (157): delimits a housing (156) for at least partially receiving said at least one active power electronic component (153), and is configured to be arranged on said installation (1) so that the housing (156) receiving said at least one active power electronic component (153) extends at least in part in the circulation channel (2). 2. Control module (15) according to the preceding claim, wherein said at least one active power component (153) comprises a semiconductor component, such as an insulated gate field effect transistor. 3. control module (15) according to any one of the preceding claims, in which the heat sink (157) has a bottom wall (157a) on which said at least one active power electronic component (153) is arranged, the bottom wall (157a) being configured to extend at least in part in the circulation channel (2). 4. Control module (15) according to the preceding claim, in which the bottom wall (157a) is configured to be arranged in the circulation channel (2) with a non-zero angle of incidence (a) relative to the general direction of air flow. 5. Control module (15) according to the preceding claim, wherein the heat sink (157) has a side wall (157b) extending from the bottom wall (157a) so as to delimit said housing (156) . 6. Control module (15) according to any one of claims 1 to 5, comprising a printed circuit board (151) having an electric supply circuit of the blower on which said at least one active power electronic component is mounted. (153), said card (151) being arranged in the housing (156) of the heat sink. 7. Control module (15) according to any one of claims 1 to 5, comprising a printed circuit board (151) having an electrical supply circuit for the blower to which said at least one active power electronic component is connected ( 153) by at least one electrical connection member (154), said card (151) being offset from the housing (156) of the heat sink (157). 8. Control module (15) according to any one of the preceding claims, wherein said at least one active power electronic component (153) is force-fitted into the housing (156) of the heat sink (157). 9. Control module (15) according to any one of the preceding claims, in which the heat sink (157) comprises an internal partition (157c) inclined relative to an insertion direction (D) of said at least one electronic component. active power (153) in the heat sink (157). 10. Installation (1) for heating and / or ventilation and / or air conditioning, in particular for a motor vehicle, comprising a blower (3) configured to generate an air flow and delimiting at least one circulation channel (2) for the flow of air generated by the blower (3), characterized in that it comprises at least one control module (15) of the blower (3) according to any one of the preceding claims.