FR3143505A1 - Cleaning device for glass surface - Google Patents

Abstract

The invention proposes a cleaning device for a glass surface of a detection device fitted to a vehicle, comprising a nozzle (1) supplied with liquid cleaning product, and having a spray head (2) diffusing the liquid in the form of jet. The spray head (2) comprises at least one spray wall (3) provided with holes (5) through which jets emerge, these holes (5) being distributed in groups (G1, G2, G3, G4) , each group comprising one or more holes (5) whose jets reach a predefined zone (Z1, Z2, Z3, Z4) of the vehicle, the nozzle (1) having as many circulation channels (C1, C2, C3, C4) of liquid than of groups, each channel opening into a group of hole(s) (5), said channels being connected to valves (V1, V2, V3, V4) allowing the passage of liquid selectively in a single channel or in several canals. Figure for abstract: Figure 6

Description

Glass surface cleaning device Technical field of the invention

The present invention relates to the field of driving assistance devices and, more particularly, to the field of optical detection systems used for this purpose.

The invention relates more particularly to cleaning devices configured for cleaning an optical sensor of such an optical detection system.

Technical background

An optical detection system is any system comprising optical sensors such as cameras, laser sensors or other sensors based on the emission and/or detection of light in the spectrum visible or invisible to humans, in particular infrared.

Such optical detection systems are being fitted to an increasing number of motor vehicles either to assist the driver of the vehicle in certain driving situations, one of which is well-known, parking assistance, or to make the driving of the vehicle autonomous or partly autonomous.

The driving assistance devices may comprise detection devices that may take the form, for example, of sensors intended to evaluate an environment outside the motor vehicle, or the form of a camera intended to offer the driver visibility of an environment outside the motor vehicle, visually inaccessible from the driver's seat. Such detection devices then comprise at least one glazed surface positioned within the vehicle such that it is capable of capturing the environment outside the motor vehicle, in a desired area.

For autonomy and/or driving assistance to be as effective as possible, the data provided by the sensor must be of the best possible quality, and it is therefore essential to have a clean glass surface to carry out these data acquisitions.

To do this, a cleaning device is arranged in the vicinity of an optical detection device (for example the lens of a camera) in order to be able to project, on demand, a fluid so as to remove any dirt deposited on the glass surface of the detection device. This may be dust or insects for example.

This cleaning is essential to provide optimal visibility to the sensor or the user of the motor vehicle.

As is known, such a cleaning device comprises a nozzle hydraulically connected to a fluid storage tank. The fluid is ejected from the nozzle via a distribution orifice, towards the glass surface to be cleaned. The nozzle diffuses the cleaning liquid in the form of a jet.

During operation, the free end of the nozzle protrudes from the bodywork and is therefore visible from outside the vehicle.

It is known to use nozzles with a relatively wide jet profile, such as a flat jet or conical jet, which provide a large radius of action, sweep the entire width of the glass, and therefore clean a large surface, in this case the entire glass surface of the sensor to be cleaned, with a single distribution orifice.

The flat jet consists of a jet that strikes orthogonally or obliquely on a deflection surface that allows the jet to be reflected flat and with a large width, like a fan.

The cone jet escapes from the cleaning device with a solid or hollow cone shape.

It is therefore possible to clean the entire surface in question using a single jet, coming from a single nozzle which has a single liquid inlet and a single liquid outlet. Using a single nozzle allows you to remain discreet, and avoid having too many visible parts protruding from the vehicle bodywork.

The disadvantage of this type of nozzle with flat or conical jet is the use of too large a volume of cleaning liquid. In addition, the width of the jet required to sweep the entire glass surface to be cleaned leads to a reduction in the impact pressure, which results in a reduction in cleaning efficiency. In particular, if certain areas of the glass surface have stubborn stains, the flat or conical jet will not have enough impact to clean these areas properly.

In addition, when the outside temperature drops, or when the detection device is located at the front of the vehicle and is subject to an aerodynamic flow when the vehicle is moving, or in the presence of strong winds, the performance of the nozzle decreases because the point of impact of the jet is shifted.

In fact, when it is cold, the viscosity of the cleaning fluid drops, becoming much more viscous and therefore with a different flow, which modifies the point of impact on the surface to be cleaned.

In fact, the aerodynamic flow or the wind deflects the jet which then waters an area next to the target area or straddling the target area.

In the current context, where we want to reduce the amount of cleaning fluid used, so as to carry less volume of liquid in the vehicle, and so as not to waste the liquid on board by watering the target area precisely whatever the weather conditions, a problem arises.

The aim of the present invention is therefore to propose a cleaning device which can remain discreet and compact and which uses a smaller quantity of cleaning liquid, whilst offering high cleaning performance, both in terms of the quality of the impact with the surface to be cleaned and the precision of the impact on the surface to be cleaned, whatever the external conditions, both when driving and when the vehicle is stationary.

The invention therefore relates to a cleaning device for a glass surface of a detection device equipping a vehicle, comprising a nozzle supplied with liquid cleaning product, and having a spray head diffusing the liquid in the form of a jet, said spray head having a closed end.

The invention is mainly characterized in that said spray head comprises at least one spray wall provided with holes through which jets emerge, these holes being distributed in groups, each group comprising one or more holes whose jets reach a predefined zone of the vehicle, the nozzle having as many liquid circulation channels as there are groups, each channel opening into a group of hole(s), said channels being connected to valves authorizing the passage of liquid selectively in a single channel or in several channels.

The detection device and the cleaning device may be those of a driving assistance device housed within a motor vehicle. For example, the detection device may be a camera or a sensor for increasing the visibility of a user of the motor vehicle on the external environment of said vehicle. Each camera or each sensor has at least one glazed surface exposed to the external environment. Thanks to its glazed surface, the detection device captures data from the external environment of the motor vehicle. The cleaning device allows the cleaning of the glazed surface of the detection device such that said glazed surface is freed from external pollutants and thus its optical performance is not degraded.

The cleaning device according to the invention cleans the glass surface using several holes distributed in several groups.

Thus, there is no longer a single distribution orifice as in the prior art, but there is a plurality of distribution orifices, that is to say holes, and thus a plurality of jets.

The holes are distributed in groups, in order to concentrate the jets of the same group on a predefined area of the vehicle. There are therefore several groups that clean several areas.

This means that several areas of the vehicle can be cleaned at the same time, with just one spray wall.

Thanks to the valves and the different channels within the nozzle, it is possible to send liquid only through a single group of hole(s) in order to clean a single predefined area of the vehicle, and thus avoid wasting liquid by sending jets into the other groups.

For example, if only one area of the glass surface of the detection device is to be cleaned, while the other areas are clean, liquid will only be sent into the channel associated with the group of holes whose jet is directed to that specific area to be cleaned. The other areas will not be cleaned.

You can choose to send liquid into one or more channels, depending on the areas to be cleaned.

The use of multiple groups of holes and multiple channels is also advantageous in order to adapt to the climatic conditions outside the vehicle. For example, a first group of holes may have one or more jets directed towards the glass surface to be cleaned, and a second group of holes may have one or more jets directed towards an area of the vehicle located next to the glass surface to be cleaned. If the vehicle is not moving quickly, then the first group may be activated via a first channel and its associated valve to send a jet directly towards the glass surface. If the vehicle is moving quickly or there is wind, then the second group may be activated via a second channel and its associated valve to send a jet towards the area located next to it, but which will be deflected by the wind or by the aerodynamic flow towards the glass surface to be cleaned.

• les trous sont cylindriques.
• les trous présentent un diamètre inférieur à 300µm.
• les trous présentent un diamètre compris entre 50µm et 250µm.
• les vannes sont raccordées à une pompe, le dispositif comportant une unité centrale commandant la pompe et/ou les vannes en fonction de données d’entrée, du type vitesse du véhicule ou température extérieure.
• pour chaque groupe, chaque trou présente une orientation angulaire spécifique par rapport à la paroi d’aspersion, de sorte que le jet en sortant atteigne la zone prédéfinie sur le véhicule.
• chaque groupe de trou(s) forme un ou plusieurs jet(s) apte(nt) à impacter une zone de la surface vitrée, la paroi d’aspersion comprenant autant de groupe de trou(s) que de zones à impacter sur la surface vitrée.
• chaque jet est droit.

According to the different embodiments of the invention, which may be taken together or separately:

• the holes are cylindrical.
• the holes have a diameter of less than 300µm.
• the holes have a diameter between 50µm and 250µm.
• the valves are connected to a pump, the device comprising a central unit controlling the pump and/or the valves according to input data, such as vehicle speed or outside temperature.
• for each group, each hole has a specific angular orientation relative to the spray wall, so that the jet coming out reaches the predefined area on the vehicle.
• each group of hole(s) forms one or more jet(s) capable of impacting an area of the glazed surface, the spray wall comprising as many groups of hole(s) as there are areas to be impacted on the glazed surface.
• each throw is straight.

It is understood that the holes are very small compared to the distribution orifices of the prior art. The section of the hole being smaller, the speed of the liquid coming out in a jet is all the more important, for the same flow rate. Thus the jets are projected with much more impact on the different areas to be cleaned of the vehicle. The cleaning is thus much more efficient in terms of the quality of the impact.

By using these small holes, we drastically reduce the amount of liquid cleaning product to be used.

Advantageously, the sprinkler head is more compact because the holes are very small compared to the prior art. The part of the head protruding from the vehicle body is thus minimal.

Using a straight jet also improves cleaning performance. A straight jet means that the jet that impacts a surface forms a point on the surface. This point has a very small section, unlike flat and conical jets which have very wide sections. The idea is to use this form of straight jet, also called a "straight point", to have a more precise and stronger impact point on the area to be cleaned, so as to be able to remove stubborn dirt even better in a localized manner. Cleaning is therefore much more efficient in terms of impact precision.

The invention also relates to an assembly composed of a detection device equipping a vehicle and an associated cleaning device as described above, the detection device having a glazed surface divided into a plurality of areas to be cleaned, the cleaning device having as many groups of hole(s) as there are areas to be cleaned, each group of hole(s) forming one or more jet(s) capable of impacting the corresponding area to be cleaned.

Finally, the invention relates to a method for cleaning a glass surface of a detection device equipping a vehicle, by means of a cleaning device as described above, characterized in that a pump sends liquid to a first group when the speed of the vehicle is less than a threshold value, this first group comprising holes oriented so that the jets project liquid directly onto the glass surface to be cleaned located opposite, and the pump sends liquid to a second group when the speed of the vehicle is equal to or greater than the threshold value, this second group comprising holes oriented so that the jets project liquid indirectly onto the glass surface to be cleaned located opposite, the jets being deflected by the speed of the vehicle.

Brief description of the figures

Other features and advantages of the invention will become apparent upon reading the detailed description which follows, for the understanding of which reference will be made to the appended drawings in which:

There represents the projection of several different jet shapes;

There is a perspective view of a nozzle according to the prior art diffusing a flat jet;

There represents the projection of a straight jet from a nozzle according to the invention;

There is a perspective view of a nozzle according to the invention;

There a perspective and transparent view of the channels inside the nozzle of the ;

There is a schematic view of a hydraulic cleaning circuit according to a first configuration of the invention;

There is a schematic view of a hydraulic cleaning circuit according to a second configuration of the invention.

Detailed description of the invention

In the remainder of the description, elements having an identical structure or similar functions will be designated by the same references.

There represents the projection of several different jet shapes.

In this case, Figures 1a and 1b show the projection of a flat jet. In Figure 1a, the flat jet has a convex distribution, while in Figure 1b, the flat jet has a uniform distribution.

Figures 1c, 1d, 1e show the projection of a conical jet. This conical jet has a convex distribution in Figure 1c, a uniform distribution in Figure 1d, and a concave distribution in Figure 1e.

These types of flat and conical jets are used in prior art cleaning devices, to clean the glass surface of various optical sensors belonging to detection systems installed on motor vehicles.

Such a prior art cleaning device is illustrated in . In this case, it is a nozzle 1 hydraulically connected to a cleaning product supply source.

The cleaning product is a fluid preferably in liquid form, such as windshield washer fluid. In general, a pump takes the liquid product from the supply source (in this case a tank) and returns it, via one or more valves, to the nozzle 1 which then diffuses the liquid product in the form of a jet towards the optical sensor located nearby.

The nozzle 1 has a first end 6 corresponding to a hydraulic connection, and a second free end corresponding to a spray head 2 through which the liquid product is expelled. Here, the liquid product is sprayed in the form of a flat jet with a uniform distribution.

The nozzle 1 extends along a central axis X, from the first end 6 to the spray head 2. The nozzle 1 has an internal channel inside which the liquid product circulates from the first end 6 to the spray head 2.

The spray head 2 is closed and has an orifice for distributing the liquid product to diffuse it in the form of a jet, after it has been reflected on a deflection surface located inside the head 2, so as to obtain a flat jet.

For flat and cone jets, the single distribution orifice must be large enough to provide a wide projection at the outlet, of the order of 0.3mm to 1mm in diameter.

For conical jets, the distribution orifice must have a particular shape, for example with a first cylindrical section followed by a second conical section flared outwards. It is also possible to provide a swirl chamber inside the spray head opening onto the distribution orifice. It is also possible to provide a nozzle in the spray head, with an anvil arranged inside, so as to form a jet with a certain shape at the outlet. There are many technical solutions.

These flat and conical jets have the advantage of being able to diffuse the product with a relatively wide spectrum, and therefore of covering at least the entire width of the glass surfaces of the sensors.

However, the pressure of the liquid product on the glass surface at the time of impact is sometimes not sufficient to remove the most stubborn stains, and the entire glass surface is cleaned each time the nozzle is activated, even though there is only a small dirty area to clean on the glass surface, which requires the use of a large quantity of cleaning liquid.

In addition, when the outside temperature drops, or there is a lot of wind, or the vehicle is moving at high speed, the jet tends to be deflected and spray an area next to the glass surface. The cleaning fluid is thus wasted.

Hence the use of a nozzle 1 according to the invention as illustrated in figures 4 and 5.

In these figures, the nozzle 1 used has several inlets E1, E2 for cleaning liquid, each inlet E1, E2 being connected to a cleaning liquid circulation channel which flows through the spray head 2 of the nozzle 1.

In the example shown, there are two channels C1 and C2. There could be more within the scope of the present invention.

So the first channel C1 starts at the first input E1, and the channel C2 starts at the second input E2.

These liquid inlets E1, E2 correspond to hydraulic connections, suitable for connection to valves.

The channels C1, C2 have a first section extending in a first direction X1, X2, then a second section extending in a second direction Y1, Y2 perpendicular to the first direction X1, X2.

Other channel paths and orientations are within the scope of the present invention.

Holes 5 are made in the spray head 2, more precisely at the level of a spray wall 3, and open into the channels C1, C2, at the end of the channels, in their second sections.

In the example shown, four holes 5 open into the first channel C1, and four holes 5 open into the second channel C2.

These holes are aligned along axes Y1 and Y2, but they could have another spatial distribution, as long as they open into the corresponding channel.

The nozzle 1 presented thus comprises a first group G1 of four holes 5 exiting the first channel C1, and a second group G2 of four holes 5 exiting the second channel C2.

There are as many groups of holes as there are channels.

When cleaning fluid is injected into the inlet E1 of the nozzle 1, four jets will come out through the four holes 5 of the group G1.

When cleaning fluid is injected into the inlet E2 of the nozzle 1, four jets will come out through the four holes 5 of the group G2.

Holes 5 have a uniform section.

Preferably, the holes 5 are cylindrical, therefore with a circular section.

But they could have a square or rectangular section.

There is no deflection surface in the spray head, no nozzle, no anvil, as in the prior art. The holes 5 are simple.

These 5 simple holes allow to obtain a straight jet at the exit, which means that its projection corresponds only to a point, as illustrated in .

Such a straight jet cannot sweep the entire width of a glass surface of a detection device, unless the glass surface is very small. However, with such a straight jet, the pressure is greater at the point of impact, compared to a cone or flat jet. Thus, this type of straight jet allows to better clean the dirty surfaces at the precise location where it impacts them.

So, instead of having a single jet that must cover the entire glass surface, there are several jets that reach several areas of the glass surface, so that in the end the cleaning fluid spreads over the entire surface.

According to the invention, the holes 5 have a diameter of less than 300 µm. These are therefore small holes compared to the prior art.

Preferably, the holes have a diameter between 50µm and 250µm.

The smaller the passage section of the hole 5, the more the fluid speed increases for the same volume flow rate. Thanks to this higher fluid speed (i.e. the speed of interaction with the surface), the point of impact on the glass surface will be more significant in terms of impact pressure, compared to the prior art.

This also allows you to be precise at the point of impact on the surface to be cleaned.

The holes 5 are so small that the total of their sections remains less than the section of a distribution orifice according to the prior art.

With these small holes, it follows that the consumption of liquid product necessary for cleaning is lower compared to the prior art. Indeed, consumption drops by at least 40%, and up to 60% with a nozzle according to the invention compared to a nozzle according to the prior art, and this while maintaining the same percentage of coverage of the cleaned surface.

Each hole 5 has a specific angular orientation relative to the spray wall 3, so that the jet coming out points towards a specific area of the vehicle.

For example, a hole may be perpendicular to the spray wall 3 and thus send a jet perpendicular to the spray wall 3, or it may be oblique to the spray wall 3 and thus send a jet oriented to the right, or to the left, and/or to the front or to the rear of the spray head 2.

The angles are chosen depending on the area to be hit with the jet on the vehicle.

The vehicle has a hydraulic circuit for cleaning the glass surface of a detection device fitted to the vehicle.

The cleaning liquid is stored in a tank 7. A pump 8 sucks up this liquid and injects it into a network of valves V arranged upstream of the nozzle 1 and connected to the inlets E of the nozzle 1.

In the first configuration shown on the , nozzle 1 has four inlets E1, E2, E3, E4 connected to four valves V1, V2, V3, V4.

These inlets E1, E2, E3, E4 open onto four internal channels C1, C2, C3, C4 running inside the nozzle 1 and leading to groups G1, G2, G3, G4 of holes 5 through which jets emerge when liquid is sent there. In other words, there are four channels.

The holes 5 are made in the spray wall 3 which is arranged opposite a glass surface of a detection device.

This glass surface is divided into several zones Z1, Z2, Z3, Z4 to be cleaned.

There are as many channels as there are areas to clean, and vice versa.

The areas are thus separated hydraulically thanks to the plurality of tracks.

Thus, holes 5 of group G1 are oriented so that their jets reach zone Z1, and are distributed over this zone Z1.

Likewise for holes 5 of groups G2, G3, G4 opposite zone Z2, Z3, Z4.

If the entire glass surface is dirty, then all areas should be cleaned, and all valves should be opened to allow the cleaning fluid to flow through all channels to spray the entire glass surface.

If only one area is dirty, then only the valve corresponding to the group of holes facing the area in question will be opened, the other valves will be closed. This avoids wasting liquid unnecessarily on areas that do not need to be cleaned.

If several zones are dirty, then the corresponding valves are opened, the other valves are closed.

In addition to cleaning only the dirty areas, these are cleaned with several small high-impact jets, therefore with high cleaning performance.

In the second configuration shown in , nozzle 1 has two inlets E1, E2 connected to two valves V1, V2.

These inlets E1, E2 open onto two internal channels C1, C2 running inside the nozzle 1 and leading to groups G1, G2 of holes 5 through which jets emerge when liquid is sent there.

The holes 5 are made in the spray wall 3 which is arranged opposite a glass surface of a detection device.

In this example, this glazed surface is not divided, it corresponds to a zone Z1 of the vehicle. It would be quite possible to divide it as in the previous example.

A second zone Z2 of the vehicle is located next to zone Z1. This can be a body zone for example, or any other part of the vehicle.

Holes 5 of group G1 are oriented so that their jets reach zone Z1, and are distributed over this zone Z1.

Holes 5 of group G2 are oriented so that their jets reach zone Z2, and are distributed over this zone Z2 (as illustrated by the dotted lines).

When the vehicle is stationary or traveling below a threshold speed, of the order of 70 km/h for example, and in the absence of wind, then only valve V1 will be open and cleaning liquid will impact zone Z1 of the glass surface to clean it if necessary.

When the vehicle is travelling above the threshold speed, or when there is a lot of wind, then the jets coming out of the group of holes G1 are deflected by the aerodynamic flow or by the wind (illustrated by the arrow) and spray an area next to the glass surface. Thus, the cleaning function is inoperative under these conditions, and the cleaning fluid is wasted if the valve V1 is open.

To overcome this problem, the holes 5 of group G2 are oriented relative to the spray wall 3 so that their jets, which normally reach zone Z2 in the absence of wind or when the vehicle is traveling at a speed below the threshold value, reach zone Z1 by being deflected by the aerodynamic flow or by the wind (as illustrated by the solid lines).

So, when the vehicle is traveling above the threshold speed, or when there is a lot of wind, valve V1 is closed while valve V2 is open and cleaning liquid will impact zone Z1 of the glass surface to clean it if necessary.

It is understood that depending on the position of the detection device on the vehicle, the aerodynamic impact will be different, and the orientation of the holes 5 will be adjusted accordingly beforehand.

The cleaning device comprises a central unit that receives input data from sensors, including a vehicle speed sensor, or an anemometer, or a temperature sensor, which provides information on weather conditions or the vehicle's driving speed. Depending on these external parameters, and whether or not the glass surface of the detection device needs to be cleaned, the central unit controls the pump and/or valves, in order to activate the correct jets on the correct area to be cleaned.

The valves can correspond to solenoid valves controlled by the central unit. These are active valves, controlled via an electrical system.

The valves can also correspond to passive valves, which open or close depending on the pressure of the cleaning liquid sent by the pump. For example, if the central unit commands the pump to send liquid to the valves at a pressure between 2 and 3 bars, then only valve V1 opens, while if the pressure is between 3 and 4 bars, then only valve V2 opens.

Such a choice of valve, active or passive, is also valid for the first configuration presented previously.

Whatever the configuration, the holes 5 are preferably arranged in the vicinity of the closed end 4 of the spray head 2. Indeed, only the spray head 2 protrudes from the body of the vehicle. The closer the holes 5 are to the closed end 4, the more it will be possible to hide part of the spray head 2 in the body. This is valid for the nozzles fixed in the body. The nozzles of the present invention can also be removable, in particular movable by translation, or even telescopic in order to disappear under the hood.

The spray head 2 comprises at least one spray wall 3. The spray wall 3 is oriented towards the detection device to be cleaned located near the nozzle 1.

The spray head 2 could have several spray walls 3 if there are several glass surfaces to be cleaned. It is possible to multiply the channels accordingly.

Whether the spray wall 3 is flat (as in the examples shown here) or curved, the angular orientation of the holes is chosen as explained previously, obliquely or perpendicularly, depending on the position and extent of the target surface to be cleaned, the objective being to have a high coverage rate of the area of the surface to be cleaned.

Other shapes and other sections of spray heads may fall within the scope of the present invention, provided that the holes 5 are small and project jets which reach the area of the surface to be cleaned of the detection device.

The sprinkler heads can be advantageously obtained by additive manufacturing in order to obtain holes of very small section, rather than by drilling them.

That said, any other manufacturing technique can be envisaged within the framework of the present invention.

The configurations shown in the cited figures are only possible examples, in no way limiting, of the invention which on the contrary encompasses the variants of shapes and designs within the reach of those skilled in the art.

Claims (10)

Cleaning device for a glass surface of a detection device equipping a vehicle, comprising a nozzle (1) supplied with liquid cleaning product, and having a spray head (2) diffusing the liquid in the form of a jet, said spray head (2) having a closed end (4),
wherein said spray head (2) comprises at least one spray wall (3) provided with holes (5) through which jets emerge, these holes (5) being distributed in groups (G1, G2, G3, G4), each group (G1, G2, G3, G4) comprising one or more holes (5) whose jets reach a predefined zone (Z1, Z2, Z3, Z4) of the vehicle, the nozzle (1) having as many channels (C1, C2, C3, C4) for circulation of liquid as there are groups (G1, G2, G3, G4), each channel (C1, C2, C3, C4) opening into a group (G1, G2, G3, G4) of hole(s) (5), said channels (C1, C2, C3, C4) being connected to valves (V1, V2, V3, V4) allowing the passage of liquid selectively in a single channel or in multiple channels. Device according to the preceding claim, in which the holes (5) are cylindrical. Device according to the preceding claim, in which the holes (5) have a diameter of less than 300 µm. Device according to the preceding claim, in which the holes (5) have a diameter between 50µm and 250µm. Device according to one of the preceding claims, in which the valves (V1, V2, V3, V4) are connected to a pump (7), the device comprising a central unit controlling the pump (7) and/or the valves (V1, V2, V3, V4) as a function of input data, such as vehicle speed or outside temperature. Device according to one of the preceding claims, in which, for each group (G1, G2, G3, G4), each hole (5) has a specific angular orientation relative to the spray wall (3), so that the jet leaving it reaches the predefined zone (Z1, Z2, Z3, Z4) on the vehicle. Device according to one of the preceding claims, in which each group (G1, G2, G3, G4) of hole(s) (5) forms one or more jet(s) capable of impacting a zone (Z1, Z2, Z3, Z4) of the glazed surface, the spray wall (3) comprising as many groups (G1, G2, G3, G4) of hole(s) (5) as there are zones (Z1, Z2, Z3, Z4) to be impacted on the glazed surface. Device according to one of the preceding claims, in which each jet is straight. Assembly comprising a detection device equipping a vehicle and an associated cleaning device according to one of the preceding claims, the detection device having a glazed surface divided into a plurality of zones (Z1, Z2, Z3, Z4) to be cleaned, the cleaning device having as many groups (G1, G2, G3, G4) of hole(s) (5) as there are zones (Z1, Z2, Z3, Z4) to be cleaned, each group (G1, G2, G3, G4) of hole(s) (5) forming one or more jet(s) capable of impacting the corresponding zone (Z1, Z2, Z3, Z4) to be cleaned. Method for cleaning a glass surface of a detection device fitted to a vehicle, by means of a cleaning device according to one of claims 1 to 8, in which a pump (7) sends liquid to a first group (G1) when the speed of the vehicle is less than a threshold value, this first group (G1) comprising holes (5) oriented so that the jets project liquid directly onto the glass surface to be cleaned located opposite, and the pump (7) sends liquid to a second group (G2) when the speed of the vehicle is equal to or greater than the threshold value, this second group (G2) comprising holes (5) oriented so that the jets project liquid indirectly onto the glass surface to be cleaned located opposite, the jets being deflected by the speed of the vehicle.