FR2971470A1 - HEATING AND TRANSPORTING CONDUCT OF ICE-LIQUID WASHING MACHINE FOR AUTOMOTIVE MOTOR VEHICLE WIPER BLADE - Google Patents

Abstract

The present invention relates to a motor vehicle windscreen wiper fluid heating and transporting pipe comprising: - a sleeve (4; 64) extruded from at least one circulation channel (6; 6b) and having at least two heating conductors (7a, 7b) embedded in the mass of the sleeve (4; 64), and - a male liquid connector (8; 68) having at least one cannula (10; 10a, 10b) having an inlet tubular end inserted in the circulation channel and a tubular outlet end for insertion into a corresponding female liquid connector of a female wiper blade connector (16), characterized in that the heating conductors (7a, 7b) are electrically connected to form a heating conductive loop extending at least partially adjacent the cannulas (10; 10a, 10b) of the male liquid connector (8; 68) to the outlets ( 12; 12a, 12b) cannulas.

Description

Heating and fluid transport pipe-windshield washer for motor vehicle windscreen wiper blade

The present invention relates to a windshield washer fluid heating and transporting pipe for a motor vehicle windscreen wiper blade, in which the washer fluid is heated / defrosted before being sprayed onto the glass surface of the vehicle. motor vehicle. The invention is more particularly applicable to a pipe for heating and transporting washer fluid for a wiper blade with two spray bars.

The nozzles are supplied with washer fluid contained in a tank via a pump. When the temperature of the washer fluid is too low, for example below 5 ° C, the windshield washer fluid is heated / thawed. For this, a transport pipe warms the washer fluid taken from the reservoir by the pump to the nozzle (s) for example when the windshield washer control is actuated, generally by the lever of control placed beside the steering wheel and controlling inter alia the actuation of the wipers. In order to carry out the actual heating of the windshield washer fluid, a network of heating and transport pipes extruded from circulation channels is used and in which electrical heating conductors are embedded in the mass. Thus the windshield washer fluid is heated and conveyed in the pipe to the nozzle (s) without obstacle in the windshield washer fluid circulation channel while limiting the size and cost of the pipe. The reheat and liquid-washer transport pipes are connected to the wiper blades by a fluidic and possibly electrical connection. Specifically at the connection, the liquid connection of the heating pipe and transport is partially inserted into a corresponding female liquid connector. This connection zone, which is difficult to access, can constitute a cold zone which can disturb the circulation of the windshield washer fluid in the event of freezing, or even completely block it.

One of the aims of the present invention is to overcome these drawbacks by proposing an improved motor vehicle windscreen wiper fluid heating and transport pipe, without a cold zone at the fluid connection between the pipe. reheat and transport and the connector of the wiper blade, which is low cost and small footprint.

For this purpose, the subject of the present invention is a heating and transport pipe for windshield wiper fluid for a motor vehicle wiper blade 10 comprising: an extruded sleeve of at least one circulation channel and comprising at least one two heating conductors embedded in the body of the sleeve, and a male liquid connector having at least one cannula having an inlet tubular end inserted into the circulation channel and a tubular outlet end for insertion into a female connector. corresponding liquid of a female wiper blade connector, characterized in that the heating conductors are electrically connected to form a conductive heating loop extending at least partially adjacent the cannulas of the male liquid connector to at the outlets of the cannulae.

According to one or more characteristics of the heating and transport pipe, taken alone or in combination: the heating conductors extend out of the sleeve on the male liquid connector and join together forming a heating conductive loop and the heating pipe and carrier comprises: - an electrical male connector attached to the male liquid connector, intended to be connected to a corresponding electrical base of the wiper blade female connector, and a guide support of the loop heating conductor interposed between the liquid male connector and the electrical male connector, the guide support being intended to guide the insertion of the heating conductive loop into a corresponding central hole of the female wiper blade connector, the heating pipe and transport comprises a conductive element carried by the cannula and whose end disposed on the side of the input is connected the conductive element has a conducting ink, the conductive element has metal tracks, the heating and transport pipe has a metal track overmolded in the cannula, the end of which is arranged on the side of the inlet of said cannula and is connected to the heating conductors, the male liquid connector comprises a leaktight passage means for the passage of the two heating conductors and said heating conductors extend out of the sleeve through the leaktight passage means, in the cannula until at the outlet by a heating conductive loop, the cannula has a bent portion between the tubular inlet end and the tubular outlet end and the leaktight means is provided at the bent portion, in an extension of the tubular outlet end, the heating and transport pipe comprises an extruded sleeve of two channels circulation and the male fluid connector comprises two cannulas held together by two reinforcing crosspieces, the tubular ends of the cannulae being inserted into the circulation channels and the tubular outlet ends of the cannulas being intended to be inserted into the corresponding female liquid connector of the wiper blade female connector, the heating conductors extend out of the sleeve and are connected together by a heated conductive loop extending between the cannulas, on the first cross member of reinforcement and on the guide support to the outlets, the heating conductors extend out of the sleeve and are connected together on the male-to-liquid connector side by a conductive heating loop disposed on the reinforcing cross-members, the second reinforcing cross-member being disposed near the outlets, the holding notches are formed in the first crosspiece of reinforcement for positioning and holding the heating conductors, the heating and transport pipe comprises an H-shaped conductive element extending along the cannulas and along the second reinforcing beam of the male coupling to liquid and whose ends arranged on the inlet side of the cannulas are connected to the heating conductors, the overmolded metal track has an H-shape extending along the cannulas and along the second reinforcing beam of the male-to-liquid connection and the ends of which are arranged the inlet side of the cannulas protrude from the male to liquid connector and are connected to the heating conductors, the heating conductive loop has a C-shape extending through the first sealing means in the first cannula to the outlet and through the second sealing means in the second cannula to the outlet. We take advantage of the presence of the heating conductors embedded in the sleeve to also heat the male to liquid connection without the need for intermediate electrical connectors or additional electrical cables, ie without additional cost using existing means.

In addition, when the heating and transport pipe has a guide support, the heating conductive loop can be inserted into the existing central hole of the female wiper blade connector. The electrical male connector is then reheated to the outlets by also heating the tubular outlet ends inserted into the liquid female connector in continuity and without modification of the male liquid connector or the female wiper blade connector which may remain standards. This ensures a continuity of heating of the windshield washer fluid in the heating pipe and transport to the outputs of the male to liquid connector.

The subject of the invention is also a heating and transport pipe for windshield wiper fluid for a motor vehicle wiper blade comprising: a sleeve extruded from at least one circulation channel and comprising at least two embedded heating conductors in the mass of the sleeve, and a male liquid connector having at least one cannula having an inlet tubular end inserted into the circulation channel and a tubular outlet end for insertion into a corresponding female liquid connector of a female wiper blade connector, and an electrical male connector attached to the male liquid connector and for connection to a corresponding electrical socket of the female wiper blade connector, characterized in that it comprises at least one minus a heating strip electrically connected to the electrical tracks of the electrical male connector, said heating strip being interposed between the liquid male connector and the electrical male connector and being adapted to be inserted into a central hole of the female wiper blade connector.

Other features and advantages of the invention will emerge from the following description, given by way of example, without limitation, with reference to the accompanying drawings, in which: FIG. 1 represents a schematic view of a first embodiment of FIG. a heating and transporting pipe for windscreen wiper fluid for a motor vehicle wiper blade connected to a wiper blade with two spray bars, FIG. 2 is a sectional view of a FIG. 3 is a perspective view of a windshield washer fluid heating and transport pipe according to a first embodiment, connected to a connector. FIG. female wiper blade with two spray bars, FIG. 4 represents the heating and transport pipe of FIG. 3 and a front view of the female wiper blade connector of FIG. 3, said With the pipe and connector disconnected, FIG. 5 is a perspective and side view of the heating and conveying pipe of FIG. 4, FIG. 6 is a similar view of the heating and conveying pipe of FIG. 4. 7 shows a perspective view of a heating and transport pipe according to a second embodiment, FIG. 8 represents a perspective view of a heating and transport pipe according to a third embodiment. FIG. 9 represents a perspective view of a heating and transport pipe according to a fourth embodiment, FIG. 10 is a perspective view of a heating and transport pipe according to a fifth embodiment of FIG. FIG. 11 shows an alternative embodiment of the heating and transport pipe of FIG. 10, FIG. 12 represents a sectional view. of elements of a windshield washer fluid heating and transport pipe according to a sixth embodiment, FIG. 13 is a perspective view of the liquid heating and transport pipe of FIG. 12, and FIG. 14 is a perspective view of a heating and transport pipe. In these figures, the identical elements bear the same reference numbers.

FIG. 1 represents a general schematic view of a reheat and liquid-washer transport pipe 1 connected via a connection 3 to a wiper blade 2 of a motor vehicle with two spray bars. The wiper blade 2 has two ramps has a spray boom on each side of the arm of the wiper blade (not visible). Each ramp is provided with one or a plurality of nozzles or pressurized watering orifices, for dispensing the washer fluid on the glass surface. The windshield wiper fluid is sent only to the front part of the wiper, ie the windshield wiper fluid is sent to the spray boom located on the side of which the arm of the wiper blade is moving. during a rising phase of the scan and on the other side during the downward phase of the scan. This arrangement makes it possible to wipe the washer fluid instantly after it has been deposited on the glass surface, thus eliminating any interval during which the vision could have been reduced. Better visible in the cross-sectional view of FIG. 2, the heating and transport pipe 1 comprises a sleeve 4 extruded from two circulation channels 6a, 6b and comprises two heating conductors 7a, 7b embedded in the mass of the sleeve 4. sleeve 4 is of flexible material, for example rubber. The circulation channels 6a, 6b of the washer fluid and the heating conductors 7a, 7b are obtained by extrusion: the heating conductors 7a, 7b are introduced with the extruded sleeve material. The section of the sleeve 5 has for example a general shape in eight and the heating conductors 7a, 7b are aligned centrally between the circulation channels 6a, 6b. The heating conductors 7a, 7b and the circulation channels 6a, 6b are longitudinally substantially parallel to each other. The heating conductors 7a, 7b are sheathed and comprise, for example, a heating resistive wire or wires connected to heating elements, so that the windshield washer fluid taken from the reservoir by the pump (s) towards the heating rail. respective watering is heated when the heating conductors 7a, 7b are fed. In use in a first direction of the wiper blade, the washer fluid is heated in the first circulation channel 6a of the heating and transport pipe 1 and feeds the first spray boom of the broom 2. In the opposite direction, the second circulation channel 6b feeds the second spray bar of the wiper blade 2. The heated windscreen washer fluid participates in the defrosting of the glass surfaces. At the connection 3 and as can be seen in Figures 3 and 4, the heating and transport pipe 1 comprises a male liquid connector 8 and in this embodiment, an electrical male connector 9 attached to the male connector to 8. The electrical male connector 9 comprises two electrical plugs 15a, 15b for the power supply of the heating elements of the wiper blade 2. It can also be envisaged that the heating and transport pipe has no connection. electric wiper blade, that is to say that the heating pipe and transport 1 is heated but not the wiper blade 2 (not shown). The male liquid connector 8 comprises two cannulas 10a, 10b. Each cannula 10a, 10b has a tubular shape having an inlet 11a, 11b and an outlet 12a, 12b between which the washer fluid can flow. The cannulae 10a, 10b have a bent portion between an inlet straight tubular end and a straight outlet tubular end. The cannulae 10a, 10b are independent circulation channels, held together by two reinforcing crosspieces 13, 14 (the second reinforcing crosspiece 14 is distinguished by that which is arranged between the first reinforcing beam 13 and the outlets 12a, 12b ). The tubular inlet ends of the cannulae 11a, 11b are inserted into the circulation channels 6a, 6b of the sleeve 4 so as to ensure the fluid connection between the circulation channels 6a, 6b and the cannulas 10a, 10b. The wiper blade 2 comprises a complementary female connector 16 comprising a female liquid connector that can cooperate with the male liquid connector 8 to ensure the fluid connection of the washer fluid. The female liquid connector thus has two inlet ports 17a, 17b in which the tubular outlet ends of the cannulas can be inserted (up to the height of the second reinforcing beam 14 in standard manner). Also, in the case where the wiper blade 2 is heated, the female connector 16 of the wiper blade 2 comprises an electrical base having two electric ports 19a, 19b that can cooperate with the electrical plugs 15a, 15b of the wiper blade 2. electrical male connector 9 to provide the electrical connection for the power supply of heating elements of the wiper blade. Maintaining the electrical and fluidic connection 3 is achieved by removable and complementary mechanical holding means 15 of the heating and transport pipe 1 and the female connector of the wiper blade 16. The female broom connector FIG. 16 may also include O-rings (not shown) disposed in seal surfaces provided around inlet ports 17a, 17b and electrical ports 19a, 19b and seal retainers 21, 22. 1 is connected to the wiper blade female connector 16, the seal blocker 21 is disposed on the insertable tubular ends of the outlet of the male liquid connector 8, that is between the outlets 12a. , 12b and the second reinforcing beam 14. The seal blocker 21 cooperates with the bearing surfaces 20 to hold and compress the seals of the inlet ports 17a, 17b. The seal blocker 22 is arranged around the electrical plugs 15a, 15b of the electrical plug connector 9 and cooperates with the electrical base of the wiper blade female connector 16. The heating conductors 7a, 7b are electrically connected to each other for forming a conductive heating loop extending at least partially adjacent to the cannulas 10a, 10b of the male liquid connector 8 and to the outlets 12a, 12b of the cannulas. The heating conductors 7a, 7b are intended to be connected to a supply on the other side of the sleeve 3. This takes advantage of the presence of the heating conductors 7a, 7b embedded in the sleeve 4 to also heat the male to liquid connector 8 without require intermediate electrical connectors and additional electrical cables, ie without additional cost using existing means. In the first embodiment of FIGS. 3 to 5, the heating and transport pipe 1 comprises a guide support 23. The heating conductors 7a, 7b extend out of the sleeve 4 and are connected together on the male-to-liquid connection side. 8 by a heating conductive loop extending between the cannulae 10a, 10b on the first reinforcing crossbar 13 and on the guide support 23 to the outlets 12a, 12b. The guide support 23 is interposed between the male liquid connector 8 and the electric male connector 9. It has an elongate shape, adapted to guide the insertion of the heating conductive loop into a corresponding central hole 24 of the female broom connector. The guide support 23 may be carried by the electrical male connector 9 or by the male liquid connector 8. In a particular embodiment, the seal blocker 21 of the male liquid connector 9 is arranged to serve as a guide support. The seal blocker 21 then passes the heating conductors and has a shape adapted to guide them in the central hole 24 (not shown). The central hole 24 is an existing hole in the standard female wiper blade connector 16. Indeed, the female wiper blade connector 16 being generally obtained by molding, the hole 24 disposed at the center of the inlet orifices 17a, 17b and the electric orifices 19a, 19b makes it possible to maintain an almost constant thickness of material. . The insertion of the heating conductive loop into the existing central hole 24 of the wiper blade female connector 16 allows the electrical male connector 8 to be heated up to the outlets 12a, 12b, by heating also the inserted tubular outlet ends. in the liquid female connection in continuity and without modification of the male liquid connector 8 or the wiper blade female connector 16, which can remain standard. This ensures a continuity of heating of the windshield washer fluid in the heating pipe and transport to the outputs of the male to liquid connector. According to a second embodiment shown in FIG. 7, the heating conductors 7a, 7b extend out of the sleeve 4 and are connected together on the side of the liquid male connector 8 by a conductive heating loop disposed on the reinforcing cross-members 13 14. In addition, the second reinforcing beam 14 of the male liquid connector 8 is disposed near the outlets 12a, 12b. It is thus possible to heat the male liquid connector 8 along the length of the cannulas 10a, 10b. However, in this second embodiment, it is necessary to modify the standard male connector 8 to the liquid and the female connector wiper 16 complementary wiper. In these first two embodiments, holding notches may be provided in the first cross member 13 to better position and maintain the heating conductors 7a, 7b (not shown).

According to a third embodiment shown in FIG. 8, the heating and transport pipe 300 comprises an H-shaped conducting element 25 carried by the cannulas 10a, 10b. The conductive element 25 extends along the cannulae 10a, 10b and along the second reinforcing beam 14 of the male liquid connector 8. The ends of the conductive element 25 arranged on the inlet side of the cannulas 10a, 10b are electrically connected to the heating conductors 7a, 7b. Thus, the heating conductors 7a, 7b are electrically connected to each other via the conductive member 25 to form a conductive heating loop extending against the cannulas 10a, 10b of the male liquid connector 8 to the outlets 12a, 12b. The conductive element 25 comprises for example a conductive ink.

In another example, the conductive element 25 comprises metal tracks. The metal tracks can be fixed to the cannulas 10a, 10b by elastic fitting or by gluing. They can also be overmolded. According to a fourth embodiment shown in FIG. 9, the heating and transport pipe 400 comprises an H-shaped overmolded metal track 26 extending along the cannulas 10a, 10b and along the second reinforcing cross-member 14 of the male to liquid connection 8 and whose ends disposed on the side of the cannula inlets 10a, 10b out of the male liquid connector 8 and are connected to the heating conductors 7a, 7b. Thus, the heating conductors 7a, 7b are electrically connected to one another via the overmolded metal track 26, to form a heating conductive loop extending in the cannulas 10a, 10b of the male liquid connector 8 to the outlets 12a, 12b. According to a fifth embodiment shown in FIG. 10, the male-to-liquid connector 8 comprises two leaktight passage means 27a, 27b for the passage of the two heating conductors 7a, 7b. The sealed passage means 27a, 27b are formed near the sleeve 4, at the end of the insertable tubular ends of entries. The heating conductors 7a, 7b extend out of the sleeve 4 and are electrically connected together to form a heating conductive loop extending through the leak-proof means 27a, 27b, in the cannulas 10a, 10b to the outlets 12a, 12b. Thus, a first heating conductor 7a passes through the first sealing means 27a, extends into the first cannula 10a to the outlet 12a, and then returns to the inlet of the first cannula 10a to exit by the first means watertight passage 27a. The second heating conductor 7b passes through the second leaktight passage means 27b, extends into the second cannula 10b to the outlet 12b and returns to the inlet to exit through the second passage means 27b. The heating conductive loop thus has a C-shape extending through the first sealing means 27a in the first cannula 10a to the outlet 12a and through the second passage means 27b in the second cannula 10b to at the exit 12b.

In the variant embodiment of FIG. 11, the leaktight passage means 28a, 28b are formed at the level of the bent portions, in an extension of the straight tubular ends of the outlets of the cannulas 10a, 10b and opposite the outlets 12a, 12b. . According to a sixth embodiment shown in FIGS. 12 and 13, the reheat and liquid-ice transport pipe 600 is intended to be connected to a windscreen wiper blade 2 having a single watering boom.

As can be seen in the sectional view of FIG. 12, the heating and transport pipe 600 comprises a sleeve 64 extruded from a single circulation channel 6 and two heating conductors 7a, 7b embedded in the mass of the sleeve 64. The male liquid connector 68 comprises a single cannula 10.

The heating conductors 7a, 7b are electrically connected together to form a conductive heating loop extending at least partially in the vicinity of the cannula 10 to the outlet 12, for example at least partially against the cannula, in any case sufficiently close to warm the windshield washer fluid circulating inside.

For example, the heating and conveying conduit 600 includes a guide support for guiding the insertion of the heating conductive loop into a corresponding female wiper blade connector (not shown). Alternatively, the heating and transport pipe 600 may comprise a conductive element carried by the cannula 10, extending along the cannula 10 and whose end disposed on the input side is electrically connected to the heating conductors 7a, 7b. Or, the heating and transport pipe 600 may comprise an overmolded metal track extending along the cannula 10 and whose end disposed on the inlet side leaves the cannula 10 and is connected to the heating conductors 7a, 7b. Also, the male liquid connector 68 may comprise a leaktight passage means for the passage of the two heating conductors 7a, 7b in the cannula to the outlet 12. FIG. 14 illustrates a pipe for heating and transporting liquid-lava motor vehicle windshield wiper blade 700 comprising: a sleeve 4 extruded from one (or two) circulation channel and having at least two heating conductors embedded in the mass of the sleeve, a male-to-liquid connector 8 comprising one (or two) cannula having an inlet inserted into the circulation channel and an outlet for insertion into a corresponding female liquid connector of a female wiper blade connector, and an attached male electrical connector 9 to the male liquid connector 8 and intended to be connected to a corresponding electrical base of the wiper blade female connector 16. In this embodiment, the wiper blade compo However, the heating conductors 7a, 7b do not extend to the outlets 12a, 12b of the cannulas. In this embodiment, the heating and transport pipe 700 comprises a heating strip 28 electrically connected to the electrical tracks of the electric male connector 9. The heating strip 28 is interposed between the male liquid connector and the electrical male connector and is intended to to be inserted into the central hole 24 of the wiper blade female connector 16.

Claims (16)

REVENDICATIONS1. A motor vehicle windscreen wiper fluid heating and transporting pipe comprising: a sleeve (4; 64) extruded from at least one circulation channel (6; 6a, 6b) and having at least one two heating conductors (7a, 7b) embedded in the mass of the sleeve (4; 64), and a male liquid connector (8; 68) having at least one cannula (10; 10a, 10b) having a tubular inlet end inserted into the circulation channel and a tubular outlet end for insertion into a corresponding female liquid connector of a female wiper blade connector (16), characterized in that the heating conductors (7a, 7b ) are electrically connected to form a heating conductive loop extending at least partially adjacent the cannulas (10; 10a, 10b) of the male liquid connector (8; 68) to the outlets (12; 12a, 12b) of the cannulas. Heating and transport line according to Claim 1, characterized in that the heating conductors (7a, 7b) extend out of the sleeve (4; 64) on the male liquid connector (8; 68) and join together. forming a heating conductive loop and that the heating and conveying line comprises: an electrical male connector (9) attached to the liquid male connector (8; 68) for connection to a corresponding electrical socket of the female connector of a wiper blade (16), and a guide support (23) of the heating conductive loop interposed between the liquid male connector (8; 68) and the electrical male connector (9), the guide support (23) being for guiding the insertion of the heating conductive loop into a corresponding central hole (24) of the female wiper blade connector (16). 3. Reheating and transport line according to claim 1, characterized in that it comprises a conductive element (25) carried by the cannula (10; 10a, 10b) and whose end disposed on the side of the inlet ( 11a, 11b) is connected to the heating conductors (7a, 7b). 4. Reheating and transport line according to claim 3, characterized in that the conductive element (25) comprises a conductive ink. Heating and transport line according to claim 3, characterized in that the conductive element (25) comprises metal tracks. 6. Reheating and transport pipe according to claim 1, characterized in that it comprises an overmolded metal track (26) in the cannula (10; 10a, 10b) whose end disposed on the side of the inlet (lla , 11b) out of said cannula (10; 10a, 10b) and is connected to the heating conductors (7a, 7b). 7. Reheating and transport line according to claim 1, characterized in that the male liquid connector (8; 68) comprises a leaktight passage means (27a, 27b, 28a, 28b) for the passage of the two heating conductors ( 7a, 7b) Heating and transport line according to claim 7, characterized in that the cannula (10; 10a, 10b) has a bent portion between a tubular inlet end and a tubular outlet end and that the watertight passage (28a, 28b) is formed at the bent portion in an extension of the tubular outlet end. Heating and transport line according to one of claims 1 to 8, characterized in that it comprises a sleeve (4) extruded from two circulation channels (6a, 6b) and in that the male to liquid connection (8) comprises two cannulas (10a, 10b) held together by two reinforcing crosspieces (13, 14), the tubular inlet ends of the cannulas being inserted into the circulation channels (6a, 6b) and the tubular ends of outlet of the cannulas being adapted to be inserted into the corresponding female liquid connector of the female wiper blade connector (16). and in that said heating conductors (7a, 7b) extend out of the sleeve (4; 64) through the sealing means (27a, 27b; 28a, 28b) into the cannula (10; 10a, 10b). to the outlet (12a, 12b) by a heating conductive loop. Heating and transport line according to claim 9, taken together with claim 2, characterized in that the heating conductors (7a, 7b) extend out of the sleeve (4) and are connected together by a heating conductive loop. extending between the cannulas (10a, 10b), on the first reinforcing beam (13) and on the guide support (23) to the outlets (12a, 12b). Heating and transport line according to claim 9, characterized in that the heating conductors (7a, 7b) extend out of the sleeve (4) and are connected together on the side of the liquid male connection (8) by a heating conductive loop disposed on the reinforcing crosspieces (13, 14), the second reinforcing crossbar being disposed near the outlets. Heating and transport line according to one of claims 10 or 11, characterized in that holding notches are provided in the first reinforcing beam (13) for positioning and holding the heating conductors (7a, 7b). ). Heating and transport line according to Claim 9, taken together with one of Claims 3 to 5, characterized in that it comprises an H-shaped conductive element (25) extending along the cannulas ( 10a, 10b) and along the second reinforcing beam (14) of the male liquid connector (8) and whose ends arranged on the side of the inlets (11a, 11b) of the cannulas are connected to the heating conductors (7a, 7b). . 14. Heating and transport pipe according to claim 9, taken together with claim 6, characterized in that the overmolded metal track (26) has an H-shape extending along the cannulas (10a, 10b) and the along the second reinforcing beam (14) of the male liquid connector (8) and whose ends disposed on the inlet side (11a, 11b) of the cannulas (10a, 10b) exit the male liquid connector (8) and are connected to the heating conductors (7a, 7b). 15. Heating and transport pipe according to claim 9, taken together with one of claims 7 or 8, characterized in that the heating conductive loop has a C shape extending through the first watertight passage means ( 27a, 28a) in the first cannula (10a) to the outlet (12a) and through the second passageway (2711, 28b) in the second cannula (10b) to the outlet (12b). 16. A motor vehicle windscreen wiper fluid heating and transporting pipe comprising: a sleeve (4; 64) extruded from at least one circulation channel (6; 6a, 6b) and comprising at least two heating conductors (7a, 711) embedded in the mass of the sleeve (4; 64), and a male liquid connector (8; 68) having at least one cannula (10; 10a, 10b) having a tubular end of inlet inserted into the circulation channel (6; 6a, 6b) and a tubular outlet end for insertion into a corresponding female liquid connector of a female wiper blade connector (16), and a electrical male connector (9) fixed to the male liquid connector (8; 68) and intended to be connected to a corresponding electrical base of the female wiper blade connector (16), characterized in that it comprises at least a heating strip (28) electrically connected to the electrical tracks of the electrical male connector (9), said heating strip (28) being interposed between the male liquid connector (8; 68) and the electrical plug connector (9) and being adapted to be inserted into a central hole (24) of the female wiper blade connector (16).