FR2634709A1 - DEVICE FOR HEATING THE WASHING LIQUID OF A MOTOR VEHICLE WASHER INSTALLATION - Google Patents

Abstract

The invention relates to windshield washer installations for motor vehicles. The receptacle 10 containing the washing liquid is made of plastic and there is provided a heat exchanger 11 connected to the cooling fluid circuit of the internal combustion engine by an inlet 12 and an outlet 13. The exchanger is integrated in a wall of the receptacle composed of two parts 14, 15. Main application: heating of the liquid of windshield washers and headlight washers of motor vehicles.

Description

Device for heating the washing liquid of an

  window washer installation of a motor vehicle.

  The invention relates to a device for

  to heat the washing liquid of an installation of

  ve-ice of a motor vehicle, which includes a

  plastic container for receiving the washing liquid, which is associated with a heat exchanger which is connected to the cooling fluid circuit of the internal combustion engine of the motor vehicle

by arrival and departure.

  The device of the kind mentioned at the beginning is described

  in the earlier, unpublished patent application

  subsequently, P 37 02 754.9. The heat exchanger

  feels a classic construction and is incorporated into

the recipient.

  The aim of the invention is to simplify and improve the manufacture of a device of the kind

  cited at the beginning as well as its operation.

  This problem is solved by the fact that

  pient consists of two pieces that complement each other to form the container and a built-in heat exchanger

in a wall of the container.

  The invention is based on the recognition that the conventional heat exchanger is, on the one hand, relatively complicated to manufacture and, on the other hand, exposed to increased corrosion in the liquid

  washing. Because the heat exchanger is inte-

  in a wall of the container, on the one hand, a simplified production is obtained, while on the other hand, the

risk of corrosion is excluded.

  In an advantageous embodiment of the invention, it is provided that, on a wall of one

  parts, came from molding a room that is di-

  sighted by guide elements in a sinuously shaped guiding channel. This creates a heat exchanger with a relatively large surface area and

  thanks to which it is possible to ensure a good trans-

mission of the heat.

  In an advantageous embodiment of

  the invention, it is expected that the chamber came from

  ge is divided by spacers and that in the chamber

  interlocked elements in the form of

  belonging to the other party, which protrude from an extension which serves as a cover for the chamber and which is formed on the other part. In this way, both parts of the container, including the elements forming the integrated heat exchanger, require only simple formations which can be made in a simple manner in molds for molding the plastics material.

  According to another embodiment of the invention,

  it is expected that the spacers that divide the chamber form tie rods. In this way, account is taken of the fact that a pressure is established in the cooling fluid circuit at which the heat exchanger

of heat must resist.

  Other characteristics and advantages

  the following description of forms of reali-

  indicated in the drawing, as well as claims

secondary conditions.

  In the drawings, FIG. 1 represents a section taken according to the

  line I of Figure 2, that is, through an exchange of

  heat sink integrated into a side wall of a

container for washing liquid;

  FIG. 2 is a view of a portion of the sample.

two parts;

  FIG. 3 is a cross-section of the recipe

see Figure 1;

  Figure 4 is a cross-section of another

  embodiment, with the heat exchanger in-

  tégré in the bottom of a container; Figure 5 is a sectional view of another embodiment, with gutters integrally molded in a wall of the container and which are covered by a closure plate; and FIG. 6 is a section of a container

Three parties.

  The container 10 shown in FIGS.

  3 is arranged in the engine compartment of a vehicle

  the automobile and serves to contain the washing liquid

  a windshield washer system. It is equipped with an

  fill filling 27 and means not shown, for taking the washing liquid, which is sent

  to the windshield and / or vehicle headlamps.

  In the container 10 is associated a heat exchanger

  their 11 which is connected to the cooling fluid circuit

  of an internal combustion engine of the motor vehicle

  by means of an inlet 12 and a start 13. By means of this heat exchanger 11, it is possible to unfreeze the

  washing liquid and / or to prevent it from freezing.

  The routing of the cooling fluid of the internal combustion engine of the motor vehicle is controlled

  by a valve 28 whose probe is engaged in the re-

  container 12 and which, depending on the temperature, releases

  or interrupts the delivery of coolant

  internal combustion engine.

  The heat exchanger 11 is integrated in the

  container 10. The container 10 is manufactured in two parts.

  these of plastic material 14 and 15 which are separated

  from each other by a horizontal joint and which are

  bricks separately. These two pieces 14, 15 are

  rigidly to each other, in particular by

dage.

  In the embodiment according to the figures

  1 to 3, it is provided, coming from material on a side wall

  17 of the lower part 15, visible in the top view of Figure 2, a chamber 19 which opens upwards and which is divided by spacers 20 in com-

  individual compartments that open upward.

  The part 14 which serves as the upper part, is provided with an extension 22 which serves as a cover for the chamber 19. The extension 22, leave the elements 21 in the form of comb teeth which are engaged in the

  individual compartments of the room 19. As well as

  in particular in Figure 1, the elements

  21 in the form of comb teeth do not extend

  than the bottom of chamber 19, while the spacers

  20 do not reach extension 22 serving as a hatch.

  key. This creates a sinuous guide channel. The extension 22 is provided with pipes 24, 25 which serve to connect the device to the inlet 12 and to the outlet 13. Since an overpressure develops in the cooling fluid circuit of an internal combustion engine, the spacers 20 of the chamber

  19 are tie rods that provide stiffening.

  In addition, the walls of the room are stiff.

  In the region of these stiffenings, there are

  guiding lines 23 in which the ele-

  comb-tooth 21 of item 14.

  In the exemplary embodiment according to FIGS. 1 to 3, there is provided a chamber 19 opening upwards in the region of a side wall 17.

  parts of the container 10 are separated by a horizontal joint

  zontal. In the embodiment according to Figure 4, the heat exchanger 11 is integrated in the bottom 18 of a part or part 16 of the container 10. In this case, the container 10 has a vertical dividing joint so that the chamber 19 molded on the bottom 18 extends substantially horizontally, and opens to a

  10. As can be seen from the side of the container,

  4, the bottom 18 does not extend horizontally in a straight line but, on the contrary, it is adapted to the outline of a wheel arch of the motor vehicle. Also

  in this embodiment, the chamber 19 is subdivided

  targeted by spacers 20 which have the form of tie rods. The container 10 comprises, apart from the part 16, a second part, not shown, which has, according to the principle described in FIGS. 1 to 3, a lid-shaped extension by which it

  closes room 19. This extension in the form of

  cle is provided with connecting pipes and comb-tooth elements represented in broken lines, which are engaged in the chamber 19 and which contribute

  in the same way to form a sinuous guide channel.

  It goes without saying that it is still possible to

  variants that differ from the examples of

  shown, and which realize the basic principle of the two-piece construction and the integration of a heat exchanger 11 in the container 10. By

  For example, the separation seal could be placed

  be a wall of the container 10 and the heat exchanger

  manufactured in the form of a separate element. In addition

  their, it is also possible to foresee, replacing

  a two-piece construction, a construction

in addition to two pieces.

  In the embodiment according to FIG. 5,

  gutters 32 which open outwards are

  in the bottom of the container 10, which is formed in one piece by blowing or in two pieces

  constituting injection molded parts. These drops

  32 are closed by a closure plate 31

  which is attached to the seal 30

  preferably by welding. The closing plate

  31 is provided with ribs 33 which engage in the

  32 and achieve a stiffening.

  The channels formed using gutters 32 and closure plate 31 preferably have a sinuous pattern. The connections for the heating fluid are advantageously provided in the closure plate 31. In a preferred embodiment, the gutters 32

  not extended to the front ends cor-

  corresponding to the housing, so that the liquid in the container 10 can flow without obstacles and

  completely to the deepest point where he is

  pumped by means of a pump. It goes without saying that gutters

  32 and the closure plate 31 may also be provided in the region of a side wall of the container 10. These gutters can also extend in part on

  the bottom and partly on one of the side walls.

  In the embodiment according to Figure 6,

  there is provided a heat exchanger 37 in the form of

  that contains channels that are sinuously

  se, and which can be connected to a heating fluid. This heat exchanger 37, which is also composed of

  two molded plastic parts, is initially

  made in the form of a separate element. This heat exchanger 37 is integrated in a container 10

  in that two parts 35, 36 of the container, form

  separately, are welded on this exchanger. These parts

  35, 36 of the container are also manufactured in the form of plastic moldings and welded to the heat exchanger 37. The heat exchanger 37 thus forms a kind of separation, but it must not completely isolate the one of the other the compartments of the container. At least in the area of the seabed there must be a communication between the two compartments of the

  container so that the liquid contained in the two com-

  parcels can flow to the lowest point of the

  container, from where the liquid is sucked.

Claims (10)

CLAIMS V E N D I C A T IO N S   1. Device for heating the washing liquid   of a windshield washer system of a motor vehicle   bile comprising a plastic container intended   to contain the washing liquid, which is associated a heat exchanger which is connected to the circuit of   cooling fluid of an internal combustion engine   motor vehicle by an arrival and departure, characterized in that the container (10) is composed of at least two parts (14, 15; 16; 30, 31; 35, 36, 37) which complement each other for form a heat exchanger   of heat (11) integrated in the container (10).   2. Device according to claim 1, characterized   in that, on a wall (17, 18) of one of the parts   (15, 16) of the container (10) has molded a chamber   (19) which is subdivided into a guide channel   by guide elements (20, 21).   3. Device according to claim L or 2,   characterized in that the molded-in chamber (19) is subdivided by spacers (20) and in the chamber (19) are fitted with comb-shaped elements (21) belonging to the other part. (14)   from an extension (22) serving as a cover   key for the chamber (19) and which came from casting on the other part (14).   4. Device according to claim 3, characterized   in that the spacers (20) which subdivide the chamber (19) form tie rods.   5. Device according to one of claims 1 to   4, characterized in that the walls of the chamber are provided with guide grooves (23) for the elements (21) arranged in comb teeth.   6. Device according to one of claims 1 to   , characterized in that the extension (22) in form   lid and / or the chamber (19) are provided with tubular   res (24, 25) molded for the arrival (12) and the departure (13).   7. Device according to claim 1, characterized   in that a wall of the container (10) is formed by molding the gutters (32) which open outwards and which are supplemented by a plate   closure (31) to form closed channels.   8. Device according to claim 7, characterized   in that the closing plate (31) is provided with ribs (33) which are engaged in the gutters (32).   9. Device according to claim 1, characterized   in that a plate-shaped heat exchanger (37) is provided which is arranged between two parts (35, 36) of the container (10).   10. Device according to one of claims 1 to   9, characterized in that the container (10) is composed of injection molded parts (14, 15; 16; 30, 31; 35, 36, 37).