Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
  • F16K27/00—Construction of housing; Use of materials therefor
  • F16K27/02—Construction of housing; Use of materials therefor of lift valves
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
  • F16K39/00—Devices for relieving the pressure on the sealing faces
  • F16K39/02—Devices for relieving the pressure on the sealing faces for lift valves
  • F16K39/022—Devices for relieving the pressure on the sealing faces for lift valves using balancing surfaces
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
  • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
  • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
  • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
  • B60S1/00—Cleaning of vehicles
  • B60S1/02—Cleaning windscreens, windows or optical devices
  • B60S1/46—Cleaning windscreens, windows or optical devices using liquid; Windscreen washers
  • B60S1/48—Liquid supply therefor
  • B60S1/481—Liquid supply therefor the operation of at least part of the liquid supply being controlled by electric means
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
  • F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
  • F16K11/10—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit
  • F16K11/20—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit operated by separate actuating members
  • F16K11/24—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit operated by separate actuating members with an electromagnetically-operated valve, e.g. for washing machines
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
  • F16K25/00—Details relating to contact between valve members and seats
  • F16K25/005—Particular materials for seats or closure elements
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
  • F16K27/00—Construction of housing; Use of materials therefor
  • F16K27/003—Housing formed from a plurality of the same valve elements
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
  • F16K27/00—Construction of housing; Use of materials therefor
  • F16K27/02—Construction of housing; Use of materials therefor of lift valves
  • F16K27/029—Electromagnetically actuated valves
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
  • F16K49/00—Means in or on valves for heating or cooling
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
  • F16K51/00—Other details not peculiar to particular types of valves or cut-off apparatus
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
  • B29L2031/00—Other particular articles
  • B29L2031/748—Machines or parts thereof not otherwise provided for
  • B29L2031/7506—Valves

Definitions

• the present invention relates to the field of systems for spraying cleaning liquid for motor vehicles and in particular the valves used in these systems.
• Motor vehicles all have a cleaning liquid projection system to keep the vehicle's windshield clean and allow the driver's optimum view of the exterior.
• This system can also be used for optical devices such as sensors.
• These systems generally include a reservoir for cleaning liquid, a pump and at least one valve configured to allow or block the passage of the cleaning liquid to the various spray nozzles or nozzles.
• valve for a washing liquid projection system, said valve comprising:
• valve body containing a hydraulic cavity configured to be fluidly connected to a hydraulic channel of the spraying system and intended to receive the washing liquid
• a movable element configured to be moved in the hydraulic cavity between an open position in which it allows the washing liquid to pass through the hydraulic channel and a closed position in which it blocks the passage of the washing liquid in the hydraulic channel
• the movable element is a plunger
• the elastic membrane comprises a rigid peripheral portion intended to be fixed to the wall of the valve and an elastic central portion configured to deform in the event of freezing of the cleaning liquid.
• the elastic membrane is made at least in part from an elastomeric material.
• the elastic membrane is a metal cap.
• the elastic membrane is produced by bi-material injection.
• the elastic membrane is molded onto the wall.
• the elastic membrane is glued or welded to the wall.
• the thickness of the elastic membrane is selected as a function of the pressure of the cleaning liquid in the hydraulic channel so that the elastic membrane remains undeformed over the entire pressure range. use of the valve.
• the surface of the elastic membrane is selected so as to allow, by its deformation, an increase in the volume of the hydraulic cavity corresponding to an additional volume of the hydraulic cavity obtained by the deformation of the elastic membrane or gel washing liquid, this additional volume corresponding to at least 10% of the volume of the hydraulic cavity in the absence of deformation of the membrane.
• FIG. 16 is a schematic representation of a cleaning liquid projection system.
• FIG. 18 shows a schematic sectional view of a solenoid valve according to an embodiment of the present invention
• FIG. 1 is a schematic side view of a solenoid valve according to an embodiment of the present invention.
• FIG.4 shows a schematic sectional view of the solenoid valve of Figure 2 in another configuration
• Embodiments and embodiments of the invention relate to a valve for a liquid projection system.
• Figure 1 shows an exemplary embodiment of a spraying system 20 comprising a liquid reservoir 22, a pump 24, three spray nozzles 26 of cleaning liquid configured for example to spray the cleaning liquid on the screen -brise or on optical elements of a motor vehicle.
• the projection system 20 also comprises three valves 1 to control the distribution of the cleaning liquid to the projection nozzles 26.
• the valves 1 are connected to the reservoir 22 by supply hoses 28 and the projection fittings 26 are connected to the valves. 1 by distribution hoses 30.
• the valves 1 are, for example, electromagnetic valves comprising a coil whose power supply makes it possible to control the movement of a plunger such as that described in the remainder of the description.
• the invention is not limited to solenoid valves and can also be applied to other types of valves.
• FIG. 2 represents a sectional view of a solenoid valve 1 showing the internal elements of the solenoid valve 1 and FIG. 3 represents a side view of such a solenoid valve 1.
• the electromagnetic valve 1 comprises a valve body 3 enclosing a hydraulic cavity 5 in which is positioned a movable element in the form of the plunger 7.
• the valve body 3 comprises a first part 3a comprising a coil 13 arranged around it. a first portion 5a of the hydraulic cavity 5 and a second part 3b in which are formed a first orifice 9 corresponding to an inlet of the fluid and a second orifice 11 (visible in FIG. 3) corresponding to an outlet of the fluid and containing a second portion 5b of the hydraulic cavity 5.
• the first port 9 is configured to be connected to a supply hose 28 of the fluid, for example a cleaning or washing liquid.
• the supply hose 28 is for example connected to a tank 22 of cleaning liquid via a feed pump 24 allowing the supply of cleaning liquid as in Figure 1.
• the second port 11 is configured to be connected to a projection nozzle 26 via a distribution hose 30.
• the electromagnetic valve 1 also comprises a hydraulic channel 15 connecting the first orifice 9 and the second orifice 11, said hydraulic channel 15 being in fluid connection with the hydraulic cavity 5 in which the plunger 7 is placed (the hydraulic channel 15 is therefore locally coincident with the second portion 5b of the hydraulic cavity 5).
• the hydraulic channel 15 is configured to be extended on either side of the electromagnetic valve 1, in particular via the hoses 28, 30, so as to transmit the cleaning liquid from the reservoir 22 to a projection nozzle 26.
• the plunger 7 is configured to move between an open position (not shown) in which it allows the cleaning liquid to pass between the supply hose 28 and the distribution hose 30 and a closed position (shown in FIG. 2) in which it blocks the passage of the cleaning liquid between the supply hose 28 and the distribution hose 30.
• the plunger 7 comprises for example a first portion 7a, corresponding to a flexible end in the present case, in particular an elastomer or rubber end to allow a good seal in the closed position, the first portion 7a coming into contact with a wall of the valve body 3 in the closed position to block the passage of the liquid from cleaning through the hydraulic channel 15, that is to say between the first orifice 9 and the second orifice 11.
• the displacement of the plunger 7 from the closed position to the open position is carried out via the supply of the coil 13 (for example above a predetermined voltage threshold).
• An elastic stress element 17, for example a coil spring can be disposed between the valve body 3 (or an element fixed relative to the valve body 3) and the plunger 7.
• the elastic stress element 17 is configured to force the plunger 7 in the closed position in the absence of power supply to the coil 13 (or in the event of a power supply below the predetermined voltage threshold).
• the electromagnetic valve 1 also comprises at least one opening 32 made in a wall of the valve body 3.
• a single opening 32 is arranged so as to simplify the manufacture of the valve 1, but it is also possible to provide several openings 32.
• the opening 32 is preferably formed in the second portion 5b of the hydraulic cavity 5.
• the opening 32 is closed by an elastic membrane 21 configured to deform in the event of freezing of the washing liquid in the hydraulic cavity 5.
• Figure 4 shows the valve 1 when the cleaning liquid is frozen with the elastic membrane. 21 which is deformed (with respect to its initial shape shown in FIG. 2) by the expansion due to the gel.
• the opening 32 has for example a rectangular shape as shown in Figure 3 but other shapes are also possible such as for example a circular shape.
• the size of the opening 32 can be chosen according to the volume of the hydraulic cavity 5 so that the elastic diaphragm 21 is large enough to be able to contain the excess volume in the event of freezing of the cleaning liquid in the hydraulic cavity 5.
• the additional volume created by the deformation of the elastic membrane 21 corresponds for example to at least 10% of the volume of the hydraulic cavity 5.
• the elastic membrane 21 is for example made of plastic material, such as in particular a thermoplastic elastomer, but other elastic materials can also be used such as thermosetting elastomers; thermoplastic or thermosetting polymers other than elastomers; or else metals or alloys, in particular in the form of a metal cover.
• plastic material such as in particular a thermoplastic elastomer
• other elastic materials can also be used such as thermosetting elastomers; thermoplastic or thermosetting polymers other than elastomers; or else metals or alloys, in particular in the form of a metal cover.
• thermosetting elastomers thermoplastic or thermosetting polymers other than elastomers
• metals or alloys in particular in the form of a metal cover.
• different techniques can be used for fixing the elastic membrane 21 on the valve body 3.
• the elastic membrane 21 can for example be glued, welded or overmolded. A two-material injection can also be carried out so as to obtain a peripheral part forming a rigid outline configured to come to
• the thickness of the elastic diaphragm 21 can be chosen as a function on the one hand of the material chosen for the diaphragm and on the other hand of the operating pressure range of the valve 1 so that the elastic diaphragm 21 is not deformed during normal use of valve 1, i.e. in the absence of freezing of the cleaning liquid and use within the intended pressure range (in general a valve is provided in the event of overpressure in the hydraulic circuit of the spraying system 20).
• the elastic membrane 21 thus makes it possible to prevent any damage to the valve body 3 or to the elements present in the hydraulic cavity such as the plunger 7 in the event of freezing of the cleaning liquid.
• the valve is operational again when the temperature rises without the need for manual action to make it operational.

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Water Supply & Treatment (AREA)
• Physics & Mathematics (AREA)
• Electromagnetism (AREA)
• Manufacturing & Machinery (AREA)
• Nozzles (AREA)
• Fluid-Driven Valves (AREA)
• Valve Housings (AREA)
• Details Or Accessories Of Spraying Plant Or Apparatus (AREA)
• Mechanically-Actuated Valves (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=71575441

Family Applications (1)

Country Status (7)

Families Citing this family (2)

Family Cites Families (9)

• 2020
  • 2020-02-28 FR FR2002040A patent/FR3107683B1/fr active Active
• 2021
  • 2021-01-19 WO PCT/EP2021/050999 patent/WO2021170312A1/fr unknown
  • 2021-01-19 CN CN202180025451.9A patent/CN115335623A/zh active Pending
  • 2021-01-19 JP JP2022551817A patent/JP2023516626A/ja active Pending
  • 2021-01-19 EP EP21700596.6A patent/EP4111080A1/fr active Pending
  • 2021-01-19 KR KR1020227033247A patent/KR20220148231A/ko unknown
  • 2021-01-19 US US17/801,863 patent/US20230167920A1/en not_active Abandoned

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