Solenoid valve unit, cleaning device and vehicle

Abstract

The invention relates to a solenoid valve unit (2), comprising: at least four solenoid valves (8, 10,...), each having an electromagnet EM1, EM2,..., EM9, EM10, which can be fluidically connected to one of the cleaning points via an associated output A1, A2,..., A9, A10; the invention relates to a solenoid valve (1) comprising a housing (4) having at least one central supply line (6), the housing having at least one fluid inlet (Z) for providing a pressurized fluid in the supply line (6), the solenoid valve rails (8, 10,...) being connected to the supply line (6) to the housing (4). According to the invention, each two solenoid valves (8, 10,...), which are arranged opposite one another and transversely to the feed line (6), form a modularly expandable solenoid valve pair, between which the feed line (6) is located, the common housing section 4g of the solenoid valve pair is expanded by a housing section 4g of the other solenoid valve pair either at one end of the supply line (6) or at both ends of the supply line (6) by a joined and / or integrally bonded connection. The invention further relates to a cleaning device having such a solenoid valve unit (2) and to a vehicle having such a cleaning device.

Description

Technical Field

[0001] The present invention relates to a solenoid valve unit for distributing a pressurized fluid to various cleaning parts of a device, in particular a vehicle, a cleaning device for a vehicle, in particular having such a solenoid valve unit, and a vehicle having such a cleaning device. Background Art

[0002] A liquid distribution device in the form of a solenoid valve module is known from CN 214823154 U. Summary of the Invention

[0003] One object of the present invention is to improve the water distribution for device cleaning, in particular vehicle cleaning, specifically in view of the increasing number of vehicle sensors.

[0004] This object is achieved by the solenoid valve unit according to claim 1 and claimed. In addition, the application of such a solenoid valve unit, a cleaning device having such a solenoid valve unit, and a vehicle having such a cleaning device are proposed and claimed (see claims 15, 16, and 17). The subject matter of the dependent claims is advantageous embodiments of the present invention.

[0005] The present invention provides a solenoid valve unit for distributing a pressurized fluid to various cleaning parts of a device, in particular a vehicle, specifically the parts to be cleaned. Here, the solenoid valve unit has: at least four solenoid valves each having an electromagnet, which can be fluidly connected to one of the cleaning parts via a respective output; and a housing having at least one central supply line, the housing having at least one fluid input for providing the pressurized fluid in the supply line. Here, the solenoid valves are connected to the housing transversely to the supply line.

[0006] It is proposed here that the solenoid valve unit be designed such that each two solenoid valves arranged opposite each other and transversely to the supply line form a solenoid valve pair that can be modularly expanded, the supply line being located between the two solenoid valves, and the common housing section of the solenoid valve pair is expanded with the housing section of another solenoid valve pair at one end of the supply line or at both ends of the supply line by a snap connection and / or a material-locking connection.

[0007] Here, such a solenoid valve pair represents a simple basic unit, which provides a basis for a so-called modular system in the sense of an as-small-as-possible solenoid valve unit. Advantageously, any number of such solenoid valve pairs can be expanded or combined into a correspondingly larger solenoid valve unit as needed.

[0008] Here, the snap connection between the two mutually engaged housing sections can be designed, for example, in the form of a so-called bayonet connection or the like.

[0009] Similarly, each solenoid valve can also be connected to a provided or common housing section by means of a positive connection - for example in the form of the above-described bayonet connection or the like - and / or by means of a material-locking connection.

[0010] Herein, the cleaning site can be understood as a cleaning site corresponding to a vehicle sensor. Herein, the cleaning site does not have to be part of the sensor itself, but can instead be arranged at a distance from the corresponding sensor, i.e., for example, the cleaning site is a site on the windshield or the like. However, the cleaning site can also be part of a vehicle sensor, for example, a cleaning site corresponding to a camera. However, the cleaning site can also be other vehicle parts that are not related to the vehicle sensor itself, such as other sites on the windshield, sites on the headlamps, etc.

[0011] Herein, the fluid should be understood as a liquid or a cleaning liquid. In the simplest case, herein, the fluid is water, but advantageously, the fluid is an aqueous cleaning agent solution, that is, water combined with a cleaning agent additive. Herein, the cleaning agent solution can advantageously also contain an antifreeze or anti-freezing agent that itself reduces the freezing point of the cleaning agent solution.

[0012] Herein, the fluid can also be understood as air or ambient air that is also suitable for cleaning the above-described cleaning surface in a pressurized manner.

[0013] However, the fluid can also be understood as a mixture of the above-described cleaning liquid (in the simplest case only water) and air or ambient air.

[0014] Herein, the ambient air can be understood as the air in the vehicle interior, which is suitably filtered and, if necessary, preheated air. In order to filter the air in the vehicle interior, herein, an air filter that is already provided in the HVAC system (Heating, Ventilation, and Air Conditioning → German: Heizung, Lüftung, Klimatechnik) or the air conditioning system can advantageously be used. The air filter helps to reduce costs.

[0015] The advantage of using this preheated air in the vehicle interior or warm air is that, in the case of a low external temperature in the vehicle environment, it prevents the cleaning liquid from freezing at the corresponding cleaning site (for example, a cleaning site that may be provided for the sensor optics).

[0016] The term "transverse" (→ transverse to the supply line) should be understood herein as meaning that each fluid connection between the outlet opening of the supply line and the permeable electromagnet encloses or forms an obtuse or acute angle relative to the supply line, that is, an angle greater than or less than 90°, or can also represent an orthogonal arrangement, that is, enclosing or forming an angle of 90°.

[0017] It is proposed here that an electromagnet assigned to one of the output parts can be flowed through transversely to the supply line via the output openings provided in the supply line.

[0018] Thereby, the pressurized fluid from the central supply line can be conveyed to the respective output part as directly as possible. Thus, advantageously, unnecessary and at the same time significant or substantial or large hydraulic losses or frictional losses (also referred to as flow losses or flow pressure losses) are eliminated, which losses are themselves related to the turning of the fluid on the path from the central supply line to the respective output part.

[0019] Therefore, with the proposed solenoid valve unit, by conveying the fluid as directly as possible transversely to the supply line to the respective output part, such hydraulic losses can be advantageously minimized.

[0020] Furthermore, advantageously thereby, a less powerful and commercially common fluid delivery unit can be used to provide the pressurized fluid in the supply line.

[0021] The proposed fluid distribution mechanism simplifies the vehicle cleaning device or the vehicle cleaning system and thus reduces the associated costs, because the fluid delivery pump and a separate valve unit can be dispensed with by means of this fluid distribution mechanism. Thus, the weight is also reduced further. And by dispensing with the fluid delivery pump, the corresponding fluid pump control is also simplified.

[0022] The proposed fluid distribution mechanism also reduces the fluid consumption. And this in turn results in an increase in the vehicle's range, which can itself be achieved by the filling level of the cleaning fluid container or the water tank. This applies in particular to future fully autonomous vehicles, which will have significantly more sensors - including safety-related sensors - compared to current vehicles, and especially for safety-related sensors, the functionality of which must be guaranteed.

[0023] Furthermore, the saving of the required equipment parts or system parts also promotes the corresponding compactness of this equipment or this system, so that less structural space is required overall.

[0024] In one embodiment, the respective output openings of the supply line are arranged coaxially with the fluid-permeable through line provided through the electromagnet. This further promotes the conveyance of the fluid transversely to the supply line directly or almost directly to the respective output part.

[0025] In another embodiment, the electromagnet can be flowed through via a valve piston located inside and serving as a closure body, the valve piston having a through-line. It is proposed here that a spring extends from the assigned electromagnet into the through-line, and in the state where the electromagnet is not energized, the valve piston is preloaded against the assigned output opening of the supply line by means of this spring and the output opening is fluid-tightly closed.

[0026] In another embodiment, the through-line of the valve piston branches or divides into at least two line sections surrounding the closure section towards the closure section of the valve piston, wherein the closure section together with the assigned housing section of the solenoid valve unit forms this line section.

[0027] Here, the closure section of the valve piston is designed to be at least partially rotationally symmetric, that is, convex, concave and / or conical, in order to fluid-tightly close the assigned output opening of the supply line. Here, the closure section can for example be implemented in the form of a spherical part.

[0028] It is proposed here that the surface of such a closure section designed to be at least partially rotationally symmetric, that is, convex, concave and / or conical, which can be pressurized from the supply line side, should be designed to be as small as possible. Because the minimization of the pressurized surface of the closure section enables a correspondingly cost-effective design of the electromagnet, since the minimum magnetic force required to drive each solenoid valve is sufficient to overcome the spring acting on the valve piston, which precisely serves as a return spring, and adjust the corresponding valve piston into the open position.

[0029] Here, the valve piston is made of a magnetic material, for example, made of plastic mixed with ferromagnetic particles or made of magnetized stainless steel, etc. In the case of plastic mixed with magnetic particles, the closure section can be injection-molded with this plastic or connected to it in a material-locking manner, or alternatively, it can also be pressed together with this plastic material.

[0030] In another embodiment, the solenoid valve unit has a central circuit board for contacting each electromagnet. Advantageously here, such a circuit board can be installed on one side or a section of the solenoid valve unit in a space-saving manner by means of a bonding connection and / or a material-locking connection, for example, at the housing forming the supply line. Here, a bus-controllable central electronic control unit can be implemented or arranged on the circuit board, so that each solenoid valve can be controlled without separate cables.

[0031] In another embodiment, the solenoid valve unit has at least one fluid delivery unit for providing pressurized fluid.

[0032] Here, the fluid conveyance unit can be a liquid conveyance pump having at least one pump stage, or can also be a fluid conveyance unit in the form of a so-called pump-compressor unit having at least one pump stage and at least one compressor stage, and the fluid conveyance unit conveys liquid and / or air in a rotation speed control and / or rotation speed regulation manner.

[0033] In another embodiment, the solenoid valve unit has at least a first fluid conveyance unit and a second fluid conveyance unit of the type described above for providing pressurized fluid. Here, the fluid conveyance units can be arranged in series and / or in parallel with each other in terms of flow / in fluid technology.

[0034] Furthermore, an application of a solenoid valve unit of the type described above is proposed, wherein at least one of the solenoid valves is not fluidly connected to any cleaning part of the vehicle, in order to reliably achieve or ensure pressure balance with the environment in the case of fluid icing in the central supply line.

[0035] Furthermore, a cleaning device for a vehicle having a solenoid valve unit of the type described above is proposed.

[0036] Furthermore, a vehicle having such a cleaning device is proposed.

[0037] Here, the vehicle should be understood as any type of vehicle operated by an internal combustion engine and / or an electric motor, but in particular should be understood as a passenger car and / or a commercial vehicle. Preferably, here, the vehicle is a partially autonomously operated vehicle, and in particular is a fully autonomously operated vehicle. Description of the Drawings

[0038] The present invention will be described in detail below with reference to the drawings. Other advantageous improvement solutions of the present invention are obtained from the dependent claims and the following description of the preferred embodiments. Among them:

[0039] Figure 1 The proposed solenoid valve unit is shown in a first perspective view,

[0040] Figure 2 Shown in a second perspective view Figure 1 the solenoid valve unit shown in

[0041] Figure 3 Shown in a third perspective view Figure 1 the solenoid valve unit shown in

[0042] Figure 4 Shown in a perspective view Figures 1 to 3 the solenoid valve pair of the solenoid valve unit shown in

[0043] Figure 5 Shown in a cross-sectional view Figures 1 to 3 the solenoid valve of the solenoid valve unit shown in Detailed implementation mode

[0044] The proposed solenoid valve unit 2 is arranged for a cleaning device of a vehicle and is used to supply pressurized liquid or cleaning liquid to various cleaning parts of the vehicle. Here, the solenoid valve unit 2 acts as a distributor, and the distributor distributes the liquid to various cleaning parts via each of the shown output parts A1, A2, ..., A9, A 10 Each of them distributes the liquid to the respective cleaning parts.

[0045] Here, the solenoid valve unit 2 has a housing 4, and the housing has an input part Z. Through this input part, the liquid provided by a liquid delivery pump or pump (not shown here) is delivered to the central supply pipeline 6 in the housing 4. Here, by Figure 1 -merely by way of example- a total of 10 solenoid valves 8, 10, ... are shown as components of the solenoid valve unit 2. On Figure 1 the upper side of the solenoid valve unit 2 shown, in addition, in a space-saving manner, a circuit board 12 is arranged on the housing 4 between the respective solenoid valves 8, 10, ..., and the circuit board extends over the entire solenoid valve unit 2 between the respective electromagnets EM1, EM2, ..., EM9, EM 10 and is in electrical contact with the electromagnets EM1, EM2, ..., EM9, EM 10 Each solenoid valve 8, 10, ... can be correspondingly and individually controlled without separate cables through the central electronic control unit arranged on the circuit board 12.

[0046] On the contrary, Figure 2 An exemplary way of fixedly fixing or fastening each solenoid valve 8, 10, ... relative to the housing 4 is shown, specifically by means of respective clamping members 14. The clamping members are respectively arranged between two solenoid valves 8, 10, ... (the housing 4 is located between these two solenoid valves) that are opposed to each other, and lock or fix the solenoid valves 8, 10, ... relative to the housing 4. Here, the clamping member 14 engages into the recesses or cavities of the respective housing sections, especially the plastic housing sections, of the corresponding solenoid valves 8, 10, ..., so as to reliably lock or fix each solenoid valve 8, 10, ... relative to the housing 4.

[0047] Instead of the respective clamping members 14, a single and correspondingly larger clamping member can also be provided for the purpose of fixing, and this clamping member engages into the said recesses or cavities in a similar way through the respective clamping sections.

[0048] As an addition or alternative to this form-fitting connection, the position fixation of the individual solenoid valves 8, 10, ... can also be reliably achieved by locally welding the solenoid valves 8, 10, ... to the housing 4 - specifically, at least by a local material-locking connection.

[0049] Here, Figure 3 it is very clearly shown that the electromagnets EM1, EM2, ..., EM9, EM 10 assigned to one of the output sections A1, A2, ..., A9, A 10 can be flowed through almost directly and transversely to the supply line 6 via the provided output openings 7 of the supply line 6. Thus, from the supply line 6 up to the respective output sections A1, A2, ..., A9, A 10 , almost no liquid deflection or only a negligible liquid deflection is required, thereby advantageously eliminating the hydraulic losses (also known as flow pressure losses) associated with such deflection or reducing them to an absolute minimum.

[0050] Therefore, the proposed solenoid valve unit 2 enables the individual electromagnets EM1, EM2, ..., EM9, EM 10 to be flowed through as directly as possible transversely to the supply line 6.

[0051] To achieve this - as direct as possible - flow through the individual electromagnets EM1, EM2, ..., EM9, EM 10 , it is furthermore proposed to arrange the individual solenoid valves 8, 10, ... orthogonally to the supply line 6 and connect them to the housing 4. This enables a very compact and space-saving solution for the liquid distribution mechanism.

[0052] Furthermore, this direct flow through the individual electromagnets EM1, EM2, ..., EM9, EM 10 is also promoted by arranging the individual output openings 7 coaxially with the provided through lines passing through the respective electromagnets EM1, EM2, ..., EM9, EM 10 .

[0053] In Figures 1 to 3 the solenoid valve unit 2 shown also represents a liquid distribution mechanism without any liquid leakage in the housing 4. Although the valve piston 18 with its spherical closing section 26 can move relative to the housing 4, 4g, the closing section 26 forms a gap through which the pressurized fluid can flow only in the open position of the assigned valve piston 18 with the assigned housing section 4g. Thus, one or more fluid delivery pumps that would have to reserve such liquid leakage themselves are not required. Therefore, the proposed solenoid valve unit 2 contributes to energy savings.

[0054] In Figures 1 to 3The solenoid valve unit 2 shown also represents a very compact and space-saving solution for the structure of the liquid distribution mechanism.

[0055] Another advantage of the proposed solenoid valve unit 2 results from its modular structure (see Figure 4 ), which itself offers a high degree of flexibility. Here, every two solenoid valves 8, 10,... arranged opposite each other and transverse to the supply line 6 (with the supply line 6 located therebetween) form a modularly expandable solenoid valve pair, and the common housing section 4g of this solenoid valve pair is expanded at one end of the supply line 6 or at both ends of the supply line 6 with the housing section 4g of another solenoid valve pair by means of a joint connection and / or a material-locking connection.

[0056] Here, the joint connection between two mutually joined housing sections 4g is exemplarily designed in the form of a bayonet connection.

[0057] Similarly, in another - not shown here - embodiment, the individual solenoid valves 8, 10,... can also be connected or joined to the assigned housing section 4g by means of such a bayonet connection and are thus fixed relative to the housing section 4g or the housing 4.

[0058] Not only the joint connection between the individual solenoid valves 8, 10,... and the correspondingly assigned housing section 4g, but also the joint connection between the individual housing sections 4g is implemented to be sufficiently fluid-tight by means of a corresponding seal, for example in the form of an O-ring.

[0059] The proposed modularity makes it possible to use the so-called modular system flexibly, from which - according to requirements or as needed - solenoid valve units 2 in the sense of a liquid distribution unit of any size can be combined in a demand-compliant and at the same time cost-optimal manner.

[0060] Here, the electromagnets EM1, EM2,..., EM9, EM 10 can each be flowed through via an internal valve piston 18 serving as a closure body (see Figure 5 ), and the valve piston 18 has a through-line 22. Here, the helical spring 20 extends into the through-line 22 within the respective electromagnets EM1, EM2,..., EM9, EM 10 In the non-energized state of the electromagnets EM1, EM2,..., EM9, EM 10 the valve piston 18 is preloaded against the assigned outlet opening 7 of the supply line 6 by means of this helical spring and fluid-tightly closes this outlet opening.

[0061] Here, a pipeline 22 branches or forks towards a closing section 26 of a valve piston 18 in the form of a spherical part into at least two pipeline sections 23, 25 surrounding the closing section 26. Here, the closing section or the spherical part 26 together with the allocated plastic housing section of the corresponding solenoid valves 8, 10,... and the allocated plastic housing section of the corresponding common housing section 4g form the pipeline sections 23, 25. Advantageously here, each valve piston 18 is made of a plastic with magnetic particles (such as ferromagnetic magnetic particles), and the plastic is connected or injection-molded together with the corresponding spherical part 26 in a material-locking manner.

[0062] Correspondingly, the spherical part 26 together with the corresponding pipeline sections 23, 25 forms a hydraulic section that causes a slight diversion of the liquid. In addition, it does not obstruct the direct flow-through of the above-mentioned corresponding solenoid valves 8, 10,... or the corresponding electromagnets EM1, EM2,..., EM9, EM 10 of.

[0063] As an alternative to this plastic design, the valve piston 18 can also be made of ferromagnetic metal or magnetized stainless steel, for example, and is connected and / or connected in a material-locking manner to the spherical part 26 or to an alternative closing section, and the alternative closing section has a rotating body section that is at least partially designed as convex, concave, and / or conical for closing the allocated output opening 7.

[0064] By using such a spherical part 26 or a closing section as a body alternative with a closing surface formed as convex, concave, and / or conical, the allocated output opening 7 of the supply pipeline 6 can be minimized. Therefore, in the closed position of the valve piston 18, the closing surface of the valve piston 18 loaded by the liquid from the supply pipeline 6 can also be minimized. This enables the return helical spring 20 and the corresponding electromagnets EM1, EM2,..., EM9, EM 10 to be designed in a force-optimized manner. This in turn enables the cost of maintaining this solenoid valve unit 2 to be kept as low as possible, because each electromagnet EM1, EM2,..., EM9, EM 10 significantly affects and increases the cost.

[0065] Therefore, the proposed valve piston 18 or its closing section or spherical part 26 makes it possible to design or dimension each solenoid valve 8, 10,... in a force-optimized and stroke-optimized manner, because the closing surface acted on by the pressurized fluid in the supply pipeline can be designed to be as small as possible.

[0066] Figure 5Shows a solenoid valve 8 having an electromagnet EM1, the electromagnet including a coil body 16 having a wire winding or coil winding made of, for example, copper, and a wire winding or coil carrier 17 made of plastic, through which the wire winding is accommodated. The wire winding carrier 17 is injection-molded with the wire winding here. At one of the two end sides of the wire winding carrier 17, a first wire end or coil end 24 and a second wire end or coil end 26 extend through the plastic of the wire winding carrier 17 and, for example, extend to a circuit board 12, and the wire ends 24, 26 are in contact with the circuit board. As an alternative, in Figures 1 to 3 each of the electromagnets EM1, EM2,..., EM9, EM 10 shown therein can be equipped with its own slot through which the wire ends with corresponding plugs can be contacted.

[0067] Furthermore, the electromagnet EM1 has a metal return pot-shaped part (Rückschlusstopf) 30 made of, for example, iron or steel, to which the coil body 16 is connected. Here, the return pot-shaped part 30 includes: a central sleeve-shaped first pot section 32, which simultaneously forms a through-pipe 38 up to the output A1 and thus forms the through-pipe passing through the electromagnet EM1; a second pot section 34 adjoining the first pot section 32; and a third pot section 36 adjoining the second pot section 34, which is connected to the coil body 16. In the through-pipe passing through the electromagnet EM1, the helical spring 20 is arranged to bear against a first spring seat in the through-pipe 38 and a second spring seat in the through-pipe 22 and is preloaded, so that in the state where the electromagnet EM1 is not energized, the valve piston 18 bears against the provided output opening 7 of the supply line 6 in a preloaded manner and fluid-tightly closes this output opening.

[0068] In Figure 5 the assembly consisting of the return pot-shaped part 30 and the coil body 16 shown therein is also partially injection-molded with plastic. On the one hand, the plastic forms a plastic section that can be connected to a common housing section 4g, through which the valve piston 18 is inserted into the solenoid valve 8 up to in front of the sleeve-shaped pot section 32, and the plastic forms a plastic section for the output A1 of the solenoid valve 8. The plastic coating not only connects the metal pot sections forming the return pot-shaped part 30 to the coil body 16, but also protects these metal sections or components from corrosion.

[0069] On the plastic section of the solenoid valve 8 that can be connected to the common housing section 4g, furthermore, a recess or notch 28 for interacting with the clamping part 14 described above and a recess or notch 29 for accommodating a sealing ring in the form of, for example, an O-ring can be seen.

[0070] The clearance S between the valve piston 18 and the basin section 32 limits the possible stroke of the valve piston 18. In the case of the liquid in the central supply line 6 freezing, this clearance S advantageously ensures or enables a so-called icing compensation or a so-called icing protection for the solenoid valve unit 2. At this time, it can be achieved that due to icing, the liquid moves through or over the valve piston 8 to avoid damage to the corresponding solenoid valve 8 and / or the supply line 6 due to icing.

[0071] In this regard, the proposed solenoid valve unit 2 provides a corresponding compensation or pressure equalization possibility for each of the solenoid valves 8, 10,... so that the individual solenoid valves 8, 10,... can eliminate the damage caused to the solenoid valve unit 2 due to icing.

[0072] In addition, a favorable application of the solenoid valve unit 2 described above in the following configuration is proposed, that is, in which at least one of the solenoid valves 8, 10,... is not fluidly connected to any cleaning part of the vehicle. Thereby, it is also possible to more reliably avoid or prevent damage to the solenoid valve unit 2 due to icing, because for the unconnected solenoid valves, there is no liquid on the output side and thus no icing will occur. Thereby, reliable pressure equalization with the environment can be achieved to prevent damage to the corresponding solenoid valve 8 and / or the supply line 6 due to icing.

[0073] Here, the respective plastic housing sections 4g of the corresponding solenoid valves 8, 10,... and the respective plastic sections are made of, for example, a thermosetting plastic or a thermoplastic plastic - such as a PPS-GF material.

[0074] Figure 4 The solenoid valve unit 2 shown in the sense of the smallest possible basic unit of the solenoid valve unit 2 shown in Figures 1 to 3 At this time shows a pair of solenoid valves, the solenoid valves 8, 10,... of which are arranged opposite each other at an angle of 180° and coaxial with each other. This arrangement enables the simple fixing of the two solenoid valves 8, 10,... relative to the common housing section 4g, for example by means of the clamping element 14 described above.

[0075] As an alternative to this arrangement, the solenoid valves 8, 10,... can also be arranged relative to each other and opposite each other and connected to the common housing section 4g such that the solenoid valves enclose an obtuse angle greater than 90° and less than 180° or an acute angle less than 90°, without losing the advantages of the modular system described above at this time. This makes the design of the proposed solenoid valve unit 2 - depending on the installation space situation - more flexible.

[0076] In another - not shown here - embodiment, in Figures 1 to 3At least one housing section 4g of one of the solenoid valves shown in the figure may have a so-called separating wall section that divides the central supply line 6 shown in the figure into at least two regions. Figure 3 In this embodiment, the housing 4 has at least one first supply line or first supply line section and a second supply line or second supply line section, each of which has a respective input section.

[0077] This even enables the operation of at least two different pressure regions using at least each respective liquid delivery pump, i.e., for example, operating the first supply line section at 3 bar and operating the second supply line section at, for example, 5 bar. This is another aspect that reflects the flexibility of the proposed solenoid valve unit 2.

[0078] The proposed solenoid valve unit 2 forms a liquid distribution mechanism or has a liquid distributor that minimizes flow pressure losses or hydraulic losses.

[0079] Therefore, the proposed solenoid valve unit 2 promotes the high performance of a vehicle cleaning device that itself has such a solenoid valve unit 2. Since the liquid pressure available at this time is relatively high, the liquid consumption of the vehicle cleaning device can be advantageously minimized. Thus, the liquid delivery pump used at this time basically only needs to compensate for the losses of the lowest solenoid valve unit 2.

[0080] Although exemplary embodiments have been described in the foregoing, it should be noted that various improvements can be implemented. In addition, it should be noted that the exemplary embodiments are merely examples and should not limit the scope of protection, application, and structure in any way. On the contrary, through the foregoing description, a guide for implementing at least one exemplary embodiment is given to those skilled in the art, wherein, in particular, various changes can be made in terms of the functions and arrangements of the described components without departing from the scope of protection given by the claims and the combination of equivalent features.

Claims

1. A solenoid valve unit (2) for distributing pressurized fluid to respective cleaning parts of a device, having At least four solenoid valves (8, 10,...) each having an electromagnet (EM1, EM2,..., EM9, EM 10 ), and the solenoid valves can be fluidly connected to one of the cleaning parts respectively via the provided output parts (A1, A2,..., A9, A 10 ). A housing (4) having at least one central supply line (6), the housing having at least one fluid inlet (Z) for providing pressurized fluid in the supply line (6), wherein, solenoid valves (8, 10,...) are connected to a housing (4) transversely to a supply line (6), characterized in that each two solenoid valves (8, 10,...) arranged opposite to each other and transversely to the supply line (6) form a modularly expandable solenoid valve pair, the supply line (6) being located between the two solenoid valves, and a common housing section (4g) of the solenoid valve pair is expanded at one end of the supply line (6) or at both ends of the supply line (6) with a housing section (4g) of another solenoid valve pair by a joining connection and / or a material-locking connection.

2. The solenoid valve unit (2) according to claim 1, characterized in that, The respective solenoid valves (8, 10,...) are joined / connected to the housing (4, 4g) by a joining connection and / or a material-locking connection.

3. The solenoid valve unit (2) according to claim 1 or 2, characterized in that, The joining connection is designed in the form of a bayonet connection.

4. The solenoid valve unit (2) according to any one of the above claims, characterized in that One of the electromagnets (EM1, EM2, ..., EM9, EM 10 ) assigned to the output units (A1, A2, ..., A9, A 10 ) can be flowed through transversely to the supply line (6) via the assigned output openings (7) of the supply line (6).

5. The solenoid valve unit (2) according to claim 4, characterized in that, The outlet opening (7) is arranged coaxially with a fluid-permeable through-line passing through the electromagnets (EM1, EM2, ..., EM9, EM 10 ).

6. The solenoid valve unit (2) according to any one of the above claims, characterized in that Electromagnets (EM1, EM2, ..., EM9, EM 10 ) can each be flowed through by a valve piston (18) serving as a closure body and located inside, the valve piston having a line (22).

7. The solenoid valve unit (2) according to claim 6, characterized in that, The spring (20) extends from the provided electromagnets (EM1, EM2, ..., EM9, EM 10 ) into the pipeline (22). In the state where the electromagnets (EM1, EM2, ..., EM9, EM 10 ) are not energized, the valve piston (18) is preloaded against the provided output opening of the supply pipeline (6) by the spring and fluid-tightly closes the output opening.

8. The solenoid valve unit (2) according to claim 6 or 7, characterized in that, A line (22) branches towards a closed section (26) of a valve piston (18) into at least two line sections (23, 25) surrounding the closed section (26), wherein the closed section (26) together with the assigned housing section of the solenoid valve unit forms the line sections (23, 25).

9. The solenoid valve unit (2) according to claim 8, characterized in that, The closed section (26) is designed to be at least partially rotationally symmetric for fluid-tightly closing an assigned output opening (7) of the supply line (6).

10. The solenoid valve unit (2) according to any one of claims 6 to 9, characterized in that, The valve piston (18) is made of a magnetic material.

11. The solenoid valve unit (2) according to claim 10, characterized in that, The valve pistons (10, 12) are made of a plastic with magnetic particles, and the plastic is connected to the closed section (26) in a material-locking manner.

12. The solenoid valve unit (2) according to any one of the above claims, characterized in that, The solenoid valve unit (2) has a central circuit board (12) for contacting the respective electromagnets (EM1, EM2, ..., EM9, EM 10 ).

13. The solenoid valve unit (2) according to any one of the above claims, characterized in that, The solenoid valve unit (2) has at least one fluid delivery unit for providing pressurized fluid.

14. The solenoid valve unit (2) according to claim 13, characterized in that, The solenoid valve assembly (2) has at least a first fluid delivery unit and a second fluid delivery unit for providing pressurized fluid.

15. The solenoid valve unit (2) according to claim 14, characterized in that, The fluid delivery units are arranged in series and / or in parallel with respect to flow.

16. Use of a solenoid valve unit (2) according to any one of claims 1 to 15, wherein, At least one of the solenoid valves (8, 10,...) is not fluid-connected to any cleaning part of the vehicle to achieve pressure equalization with the environment in case of fluid icing in the central supply line (6).

17. A cleaning device for a vehicle having a solenoid valve unit (2) according to any one of claims 1 to 15.

18. A vehicle having a cleaning device according to claim 17.

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