Electronic flow regulating valve and water supply and regulating device including it

Abstract

The present invention relates to an electronic flow control and shut-off valve (10, 20, 30, 40) by means of a piston (13, 23, 33) coupling against a seat (14), with linear actuation of the plunger that displaces the piston (13, 23, 33) by means of a motorized system (12) for regulating the flow of liquid passing through said valve (10, 20, 30, 40), wherein the piston (13, 23, 33) comprises a guide appendage (133, 333) coaxial with the displacement shaft (121) and passes through a guide housing (17, 47) located at its downstream end of the valve body (11, 41), formed by a passage to be traversed by the guide appendage (133, 333), and wherein the valve body (11, 41) comprises a liquid outlet from the area of regulation (15) which is carried out, at least, radially by one or more openings (16) arranged substantially parallel to the axis (121).The present invention also relates to a liquid regulating and supply device (100) that includes the above electronic valve (10, 20, 30, 40).

Description

ELECTRONIC FLOW REGULATING VALVE AND DEVICE REGULATION AND SUPPLY OF WATER THAT INCLUDES IT The present invention relates to an electronic flow regulating and closing valve by coupling a piston against a seat, with linear drive of the plunger that moves the piston by means of a motorized system for regulating the flow of liquid passing through said valve. The present invention also relates to a liquid regulating and supply device that includes the aforementioned electronic valve. Background of the invention The use of electronic valves for regulating the flow of liquid passing through them is known in the state of the art, which uses a flow regulation system by means of the coupling and the corresponding passage section that exists between the valve piston and its seat. These electronic valves typically have a configuration in which the piston's position relative to its seat is regulated by the motorized movement of a shaft to which the piston is attached. This shaft moves the piston between a fully closed position and a fully open position, where the free flow area between the piston and the seat is at its maximum. Between these two positions, the piston reduces the fluid flow area as it moves towards full engagement (close) with the seat. When determining the position of the piston and, therefore, the free section of liquid passage between the piston and the seat, which entails the flow of liquid passing through the valve, different piston and seat geometries are known that allow for different properties in the progressiveness of the passage section and, consequently, of the flow of liquid, when the motorized shaft displaces the piston with respect to the seat. In this regard, and typically, the pistons of this type of valve have a truncated conical shape, while the seat located in the valve body is configured to have at least a section or geometry that receives a portion of the piston, thus defining the end-of-stroke position of the shaft with the piston attached. The leak-tight seal preventing fluid flow through the opening between the piston and seat is conventionally achieved using an O-ring between the two parts, either at some point in the piston's forward stroke before or at the end-of-stroke position. This seal can be located upstream or downstream of the regulating area. This type of valve, due to its piston displacement configuration using a shaft driven from one end by a motorized system, has the disadvantage of being susceptible to mechanical vibrations, as well as noise produced by turbulent flow as it passes through the flow restriction zone between the piston and the seat, at certain opening position ranges in known examples. In the state of the art, there are systems for introducing the end of the shaft closest to the piston into the walls of the valve, for its support and guidance, formed by a blind housing where the fluid with which this support and guidance zone is in contact is not renewed and impurities accumulate in this zone. Description of the invention The objective of the present invention is to provide an electronic valve with a linear drive motor, as well as a liquid regulation and supply device that includes it, which manage to solve the aforementioned drawbacks, presenting other advantages that will be described below. Thus, and in accordance with these objectives, with respect to a first aspect, the present invention is based on an electronic flow control valve using a seat and motorized piston. The electronic valve of the present invention comprises a valve body to which a motor system is coupled, wherein the valve body comprises a control zone with at least one connection to a liquid inlet to an internal control zone of the valve and a connection to a liquid outlet of the internal control zone of the valve. The regulating zone comprises a flow control system consisting of at least one movable piston that restricts flow by closing against a seat. The piston is actuated by the electronic valve's motor system between two extreme positions: from a closed position, where the piston closes completely by engaging with the seat, to a fully open position, where the fluid flow area between the piston and the seat is at its maximum. This closure by engagement is achieved through a seal attached to the piston and / or the geometric shape of the coupling between the piston and the seat. Advantageously for the present invention, the piston comprises a body with a variable geometry profile and a front guiding appendage attached to said body with a variable geometry profile, as a projection that protrudes frontally at the downstream end of the piston, where the guiding appendage is positioned coaxially with the piston's displacement axis and passes through a guiding housing. Also advantageously for the invention, the valve body comprises this guide housing in its downstream end portion, wherein the guide housing is formed by at least one passage through a guide body, wherein the geometry of the passage is complementary to that of the guide appendage, both configured so that the guide housing maintains the coaxiality of the guide appendage throughout its displacement between the extreme regulating positions by the support and sliding of the guide appendage in the guide housing. Additionally, and also advantageously, the valve body comprises a liquid outlet from the downstream regulation zone, beyond the regulation of its flow by the interaction between the piston and the seat, so that the outlet is at least radially through one or more openings arranged substantially parallel to the piston's displacement axis. This configuration of the invention allows for an electronic valve comprising a flow regulation system consisting of at least one movable piston that restricts a flow rate by closing on a seat, wherein the piston is driven by the electronic valve's motor system according to the mixture conditions requirements regulated by a control system, conventional and not described in this application, and wherein the piston displacement is carried out without producing vibrations and noise from the turbulent liquid flow as it passes through the flow restriction zone at certain opening position ranges.This is achieved by having a piston shaft that, on the one hand, conventionally, has a first guide and support of the shaft in the area proximal to the motor system and, on the other hand, advantageously incorporates a shaft guide housing in its distal part with respect to the motor system that provides supports at the ends of the shaft without a cantilevered section, improving the coaxiality of the piston. With this configuration, the guide housing, arranged to support and guide the piston shaft at its distal end with respect to the motor system, is in a position where it is immersed in the valve fluid flow, so the fluid with which the guide housing is in contact is renewed and impurities do not accumulate in it. According to a possible embodiment of the invention, although preferably, the regulation zone comprises one or more openings arranged substantially parallel to the piston displacement axis, producing a radial fluid outlet from said regulation zone, as well as one or more openings arranged substantially transverse to the piston displacement axis, producing a fluid outlet with flow substantially parallel to the piston displacement axis. This configuration adds an axial component to the fluid flow at the outlet of the regulating zone, which reduces pressure losses in the valve because part of the flow maintains its momentum unchanged. With regard to this, and according to a possible implementation of the above configuration, the liquid outlet from the regulating zone is primarily radial. This configuration, for a valve with a reduced diameter in the regulating zone, allows for a larger liquid outlet surface area on the side walls of the housing, corresponding to the larger outlet surface area on the front or transverse wall where the guide housing is located. This eliminates the need to increase the outlet diameter of the regulating zone to provide a larger axial water outlet area, as this area is largely occupied by the guide housing. According to a possible embodiment of the invention, preferably, the guide housing is formed by a guide body forming a single piece with the seat of the regulating zone and the liquid outlet openings of the regulating zone, wherein this joint piece is independent and coupled to the rest of the valve body at its end downstream of the regulating zone, configured so that the passage opening through which the piston guide appendage passes maintains the coaxiality of the displacement of said appendage and, consequently, of the assembly it forms with the piston and its shaft, between all its displacement positions. This design allows for a simple and economical configuration due to the ease of production and forming of the overall valve body. This configuration is based on two parts: a first, independent part comprising the guide body, the regulating area seat, and the part containing the outlet openings; and a second part to which the first part and the actuator system are attached. According to another possible embodiment of the invention, the guide housing is formed by a guide body forming a single piece with the seat of the regulating zone and the liquid outlet openings of the regulating zone and in turn a single piece with the rest of the valve body, configured so that the passage opening through the piston guide appendage maintains the coaxiality of the displacement of said appendage and, consequently, of the assembly it forms with the piston and its shaft, between all its displacement positions. This alternative configuration allows for a compact, one-piece valve body solution, requiring only mounting to the engine system. According to an alternative embodiment of the invention, with respect to the two previous configurations of how the valve body and its different main parts are constituted, the guide housing is formed by a guide body forming an independent piece with respect to the piece that defines the seat assembly of the regulating zone and the liquid outlet openings of the regulating zone, wherein this independent piece is coupled to the piece that defines the seat of the regulating zone, wherein this assembly piece is the same piece as the rest of the valve body or is another independent piece that is rigidly joined to the rest of the valve body at its end downstream of the regulating zone, configured in such a way that the passage opening through which the piston guide appendage passes maintains the coaxiality of the displacement of said appendage and, consequently, of the assembly it forms with the piston and its shaft,between all its displacement positions. This configuration, which is based on the possibility that the seat of the regulating zone and the liquid outlet openings of the regulating zone can be in a separate piece from the rest of the valve body and coupled to it, or that said seat and liquid outlet openings are integrated into a single piece with the valve body, introduces the configuration of a housing body formed by an independent piece, which allows for better tribology of materials, making it possible to choose a specific material with better properties for said body without having to associate it with a whole larger piece and different design needs. Preferably, although other configurations are possible, the guide body consists of a ring configured with an opening whose geometry complements the piston's guide appendage, allowing the guide appendage to slide through it under supported conditions. The ring's geometry allows it to be integrated or coupled to the component containing the fluid outlet openings and the seat of the regulating zone. As mentioned, other configurations are possible, and cylindrical guide bodies compatible with the guided movement of the piston's guide appendage should be considered equivalent to this ring configuration. Regarding the position of the guide body, it is located flush with the downstream end of the openings, thus preventing the accumulation of liquid in the liquid outlet area downstream of the outlets. This avoids the accumulation of particles at the bottom, which can occur in prior art configurations that use blind holes. These previous designs of the valve body allow for multi-piece assembly configurations based on their final function and make their manufacture feasible using various technologies such as machining and thermoplastic injection molding, among others, thus reducing production and assembly costs. They also allow for the selection of materials for each component, ensuring good tribological behavior between the frictional pairs under the valve's operating conditions, minimizing friction and wear throughout the valve's lifespan. Also optionally, although preferred, according to the previous embodiments, the piston guide appendage is formed by a piece independent of the variable geometry profile body of the piston, to which it is coupled in a rigid manner, maintaining the coaxiality of the piston and guide appendage assembly with the displacement axis. This possibility of having a piston independent of the guiding appendage, although rigidly coupled to it, allows the most efficient choice of materials possible with respect to cost and properties for its function, as indicated above for other claims. Thus, according to another possible embodiment of the invention, the guide appendage is composed primarily of stainless steel, while the piston to which it is coupled is composed primarily of a plastic material. This allows for a reduced-cost configuration with properties in the guide appendage that ensure the reliability of its support and sliding function within the guide housing. The "predominant composition" in these cases refers to a majority proportion by weight of the element itself. Alternatively to the previous embodiment, the guide appendage is formed from the same part as the variable-geometry profile body of the piston, where the single-piece assembly of piston and guide appendage is coaxial with the axis of displacement of the assembly. This configuration allows for simpler assembly and less variability in assembly tolerances. According to a possible embodiment of the invention, applicable to any of the above main configurations, the variable geometry profile body of the piston is of truncated conical geometry. As an alternative to the above embodiment, the variable geometry profile body of the piston is of elliptical geometry. Also as an alternative to the two previous realizations, the variable geometry profile body of the piston is composed of straight and / or curved sections without defining a specific geometry profile. These realizations, based on the geometric configuration of the variable geometry profile, allow the selection of the flow curve pattern with respect to the piston stroke for the same seat geometry. According to another possible embodiment of the invention, complementary to any of the previous embodiments, the variable geometry profile body of the piston is configured so that the outer surface has a helical groove for the passage of liquid through it at the moment that the position of the piston with respect to the seat and its coupling surfaces on the seat allow the passage of liquid towards the liquid outlet of the valve body. This configuration of the piston body's outer surface with helical grooves generates an additional pressure drop in the fluid flow through the grooves, beyond that produced in the piston's variable flow section. For a given piston size, this additional pressure drop, compared to a piston body with a smooth outer surface (without grooves), allows for improved flow regulation at minimum flow rates, lower than those achievable without this feature. In accordance with the objectives indicated above, with respect to a second aspect, the present invention is based on a liquid regulation and supply device, wherein this device includes at least one electronic valve with a linear drive motor with a control system that controls the drive of the regulation system of the at least one electronic valve. Advantageously, at least one electronic valve is configured as indicated in any of the embodiments indicated in the first aspect of the invention. This configuration of a liquid regulation and supply device allows for the advantages of simplicity, compactness, configuration, efficiency, operation and costs of the electronic valve indicated in the first aspect of the embodiments of the present description of the invention. According to a preferred embodiment of the invention, the liquid regulation and supply device is configured as a mixing box with an electronic valve as described in the embodiments of the first aspect of the invention, for each of the liquid inlets to said liquid mixing box. According to another possible embodiment of the invention, the liquid regulation and supply device is configured as an electronic tap with an electronic valve as described in the embodiments of the first aspect of the invention, for each of the liquid inlets to said electronic liquid regulation and supply tap. Brief description of the figures For a better understanding of what has been explained, some drawings are included which, schematically and only as a non-limiting example, represent different practical cases of implementation. Figure 1 shows two perspective views of a valve in a first preferred embodiment, wherein Figure 1a is a view of the assembled valve and Figure 1b is an exploded view of the same valve. Figure 2 is a cross-sectional view of the valve in Figure 1 mounted. Figure 3 is an exploded view of a valve of an alternative embodiment with respect to the piston configuration. Figure 4 is a cross-sectional view of the valve in Figure 2 mounted. Figure 5 is an exploded view of a valve of another alternative embodiment with respect to the configuration of the guide appendage and the piston body. Figure 6 is a cross-sectional view of the valve in Figure 5 mounted. Figure 7 is an exploded view of a valve of an alternative embodiment with respect to the guide housing configuration. Figure 8 is a cross-sectional view of the valve in Figure 7 mounted. Figure 9 shows two views of a mixing box type flow regulating device that installs two valves as shown in Figures 1 and 2, where Figure 9a is a schematic view of the open mixing box with the valves mounted on each of the liquid supply lines to the box and Figure 9b is a partial cross-sectional view of the valve arrangement. Description of a preferred embodiment To facilitate the understanding of the present description, possible embodiments of technical solutions of the present invention are described below to facilitate a sufficient understanding of it. However, it should be noted that the present invention can be implemented in different ways than those described in this application, and the scope of protection for these embodiments should not be limited, knowing that a person skilled in the art could make similar variations without departing from the scope of this description. In a first preferred embodiment of the invention, and as shown in Figure 1 and Figure 2, the electronic valve (10) consists of a valve body (11) to which a motor system (12) is coupled, which moves a shaft (121) to which a piston (13) is attached. This motor system (12), in the present preferred embodiment, is a stepper motor which allows precise regulation of the displacement of the shaft (121) and, therefore, the position of the piston (13). The valve body (11) is formed by two main parts, a first part (111) comprising: - the seat (14) of the liquid flow regulation zone (15), where the piston (13) and its corresponding sealing gasket (131) engage and close; - the liquid outlet openings (16) of the regulating zone (15); and - the guide housing (17) for the displacement of the piston (13). The valve body (11) comprises a second part (112) that includes the means and coupling area of ​​the motor system (12) as well as the shaft housing (121) to which the piston (13) is attached. Both parts (111, 112) are coupled to obtain a two-piece valve body assembly (111, 112). Alternatively to this valve body configuration, as can be seen in Figure 7 and Figure 8, there is a valve (40) in which the valve body (41) has a first piece (411) that does not include in the same piece the guide housing (47) for the displacement of the piston (43), this guide housing (47) being an independent piece that is specially chosen from a different material and with the appropriate and specific tribological properties for its function, unlike the other parts of the first piece (411) of the valve body (41). Alternatively to this valve body configuration, not shown in the figures, the parts and components of the first and second valve body pieces can be combined into a single piece. Continuing with the first preferred embodiment, the piston (13) is moved by the motor system (12) along an axial displacement path from a flow regulation position with maximum flow, where the liquid passage area between the outer surface (132) of the piston and the seat (14) of the valve body (11) is at its maximum, to a closing position where the piston's sealing gasket (131) closes against the seat area (14). Flow regulation occurs in the regulation zone (15) where the piston body (13), depending on its position relative to the seat (14), restricts the liquid flow through the free section between the piston (13) and the seat (14) to a greater or lesser extent.The operation of the motor system (12) is controlled by a control system external to the motor system (12) itself, which modifies the displacement of the shaft (121) according to the flow of liquid passing through the valve (10) necessary to supply according to the determined needs. In this regulating principle, the piston geometry (13), together with the seat geometry (14), defines a characteristic pattern for each geometry, indicating a variation in the liquid flow cross-section and, therefore, the flow rate. In the present embodiment, the piston geometry (13) is frustoconical, with varying slopes along the generatrix of the piston body (13). Other variable piston geometry profiles are possible, such as elliptical profiles or profiles formed by straight and / or curved sections without defining a specific geometry, provided there is a variation in the piston profile geometry or at least a variation in the free flow cross-section between the piston body (13) and the seat (14) as the piston (13) moves relative to the seat (14). The piston (13) comprises a front guiding appendage (133) integral with the piston body (13) and coaxial with the piston (13) displacement axis (12). This guiding appendage (133), which in the present embodiment is a single piece with the piston body (13), is inserted for support and guidance in the guiding housing (17) to maintain the coaxiality of the piston (13) movement with its axis (12) at any point of its displacement, avoiding the vibrations and noise present in the prior art.The guide housing (17) is formed by a body, in this embodiment ring-shaped, although other complementary geometries with the guide appendage are possible, with a passage (171) through it, where the geometry of the passage is complementary to that of the guide appendage (133), both (133 and 171) configured so that, as previously stated, the guide housing maintains the coaxiality of the guide appendage throughout its displacement between the extreme positions of regulation by the support and sliding of the guide appendage (133) in the guide housing (17). As shown in Figures 5 and 6, as an alternative to the configuration of the guide appendage (333), the guide appendage (333) is a separate part from the piston (33) of the valve (30). This guide appendage (333) is made of a different material than the piston body (33) to ensure more effective operation, taking into account friction with the guide housing (37). In this embodiment, the guide appendage (333) is primarily made of stainless steel, while the piston (33) to which it is attached is primarily made of plastic. This allows for cost savings for the part, which does not need to have enhanced tribological properties. The valve (10) has a liquid inlet (18) to the regulating zone (15) where the liquid flow is restricted in the regulating zone (15) by the position of the piston (13) with respect to the seat (14), the valve (10) having a liquid outlet (19) with the regulated flow. The liquid outlet (19) from the regulating zone (15) is radial, that is, through openings arranged radially in the side walls (151), substantially parallel to the piston displacement axis (13). This configuration prevents the accumulation of particles in this area of ​​the guide housing (17, 37) of the appendage (133, 333), since this guide housing (17, 37) is not arranged as a blind hole, but as a through opening adjacent to the liquid outlet area (19) of the regulating zone, minimizing the possibility of the accumulation of such particles that the liquid may contain. According to an alternative embodiment of the liquid outlet opening arrangement (19) of the regulating zone, some of the openings are arranged in an axial configuration, perpendicular to the piston displacement axis (12) and partially maintaining the coaxial direction of the liquid flow through the regulating zone (15). This distribution of the liquid outlet openings (19) of the regulating zone (15) is configured so that the outlet surfaces are mostly located on the side walls, creating a radial outlet. As an alternative to the piston configuration (23, 33), as shown in Figures 3 to 6, the outer surface (232, 332) of the piston (23, 33) has a helical groove for the passage of liquid through it, increasing the pressure drop of the liquid flow and allowing more effective regulation in the low flow range. As can be seen in Figure 9, the valves (10, 20, 30, 40) are integrated into a liquid regulating and supply device (100) of the mixing box type, which comprises an electronic valve as described in the previous embodiments for each of the liquid inlets (F, C) to said liquid mixing box, supplying the regulated flow rate in each of them for mixing in the area (M) of the box intended for this purpose. Alternatively to the above embodiment, the liquid regulation and supply device is configured as an electronic tap-type device, which includes within it a valve (10, 20, 30, 40) for each of the liquid inlets to said tap, not shown in the figures. Although reference has been made to various specific embodiments of the invention, it is evident to a person skilled in the art that the electronic valve with linear drive motor, as well as the water supply device that includes it, are susceptible to numerous variations and modifications, and that all the details mentioned can be substituted by other technically equivalent ones, without departing from the scope of protection defined by the attached claims.

Claims

1. An electronic flow control valve with a seat and motorized piston, wherein the valve (10, 20, 30, 40) comprises a valve body (11, 41) to which a motor system (12) is coupled, wherein the valve body (11, 41) comprises a control zone (15) with at least one connection to a liquid inlet (18) to an internal control zone (15) of the valve and a connection to a liquid outlet (19) of the internal control zone (15) of the valve, wherein the control zone (15) comprises a flow control system formed by at least one movable piston (13, 23, 33) that restricts the flow rate when closed against a seat (14), wherein the piston (13, 23, 33) is actuated by the motor system (12) of the electronic valve (10, 20, 30, 40). two extreme positions, from a closed position where the piston (13, 23, 33) closes completely by coupling onto the seat (14),up to a fully open position where the liquid passage section between the piston (13, 23, 33) and the seat (14) is at its maximum, characterized in that the piston (13, 23, 33) comprises a body with a variable geometry profile and a front guiding appendage (133, 333) integral with said body with a variable geometry profile, as a projection that protrudes frontally from the downstream end of the piston (13, 23, 33), wherein the guiding appendage (133, 333) is coaxially positioned with the displacement axis (121) of the piston (13, 23, 33) and passes through a guiding housing (17, 47), wherein the valve body (11, 41) comprises this guiding housing (17, 47) at its downstream end, wherein the guiding housing (17, 47) is formed by at least one passage (171) through a guide body, wherein the geometry of the passage is complementary to that of the guide appendage (133, 333),both configured so that the guide housing (17, 47) maintains the coaxiality of the guide appendage throughout its displacement between the extreme regulating positions by the support and sliding of the guide appendage (133, 333) in the guide housing (17, 47); and wherein the valve body (11, 41) comprises a liquid outlet (19) from the regulating zone (15) downstream of the regulation of its flow by the interaction between piston (13, 23, 33) and seat (14), so that the outlet is carried out, at least, radially by one or more openings (16) arranged substantially parallel to the axis (121) of displacement of the piston (13, 23, 33). 2.- Electronic valve, according to claim 1, wherein the regulating zone (15) comprises one or more openings arranged substantially parallel to the axis (121) of displacement of the piston (13, 23,33) performing a radial liquid outlet from said regulating zone (15), as well as one or more openings (16) arranged substantially transversely to the axis (121) of displacement of the piston (13, 23, 33) performing a liquid outlet with flow substantially parallel to the axis (121) of displacement of the piston (13, 23, 33). 3.- Electronic valve, according to claim 2, wherein the liquid outlet (19) from the regulating zone (15) is mostly radial. 4.- Electronic valve, according to any of the preceding claims, wherein the guide housing (17) is formed by a guide body forming a single piece with the seat (14) of the regulating zone (15) and the liquid outlet openings (16) of the regulating zone (15), wherein this joint piece is independent and coupled to the rest of the valve body (11) at its end downstream of the regulating zone (15),configured so that the passage opening (171) that passes through the guiding appendage (133, 333) of the piston (13, 33) maintains the coaxiality of the displacement of said appendage (133, 333) and, consequently, of the assembly it forms with the piston (13, 23, 33) and its shaft (121), between all its displacement positions. 5.- Electronic valve, according to any of claims 1 to 3, wherein the guide housing (17) is formed by a guide body forming a single piece with the seat (14) of the regulating zone (15) and the liquid outlet openings (16) of the regulating zone (15) and in turn a single piece with the rest of the valve body (10), configured such that the passage opening (171) through which the guide appendage (133, 333) of the piston (13, 23, 33) passes maintains the coaxiality of the displacement of said appendage (133, 333) and, consequently, of the assembly it forms with the piston (13, 23, 33) and its shaft (121),between all its displacement positions.

6. An electronic valve according to any of claims 1 to 3, wherein the guide housing (47) is formed by a guide body forming a separate piece with respect to the piece that defines the seat assembly (14) of the regulating zone (15) and the liquid outlet openings (16) of the regulating zone (15), wherein this separate piece is coupled to the piece that defines the seat (14) of the regulating zone (15), wherein this assembly piece is the same piece as the rest of the valve body (40) or is another separate piece that is rigidly joined to the rest of the valve body (40) at its end downstream of the regulating zone (15), configured such that the passage opening (171) through which the guide appendage (133, 333) of the piston (13, 33) passes maintains the coaxiality of the displacement of said appendage and, consequently,of the assembly formed with the piston (13, 23, 33) and its shaft (121), between all its displacement positions.

7. Electronic valve, according to any of the preceding claims, wherein the guide body is formed by a ring configured to have an opening with a geometry complementary to the guide appendage (133, 333) of the piston (13, 23, 33) and to allow the sliding passage of said guide appendage (133, 333) through it, while its ring geometry allows its integration or coupling into the piece containing the liquid outlet openings (16) and the seat (14) of the regulating zone (15).

8. Electronic valve, according to any of claims 4 to 7,wherein the guide body is positioned flush with the downstream end of said openings (16) so that no liquid accumulation deposit is generated in the liquid outlet area (19) downstream of the liquid outlet openings.

9. Electronic valve, according to any of the preceding claims, wherein the guide appendage (333) on the piston is formed by a piece independent of the variable geometry profile body of the piston (33), to which it is rigidly coupled, maintaining the coaxiality of the piston (33) and guide appendage (333) assembly with the displacement shaft (121).

10. Electronic valve, according to claim 9, wherein the guide appendage (333) is composed primarily of stainless steel, while the piston body (33) to which it is coupled is composed primarily of a plastic material.

11. Electronic valve,11. Electronic valve according to any of the preceding claims, wherein the guiding appendage (133) is formed from the same part as the variable geometry profile body of the piston (13, 23), wherein the single-piece assembly, piston body, and guiding appendage (133) is coaxial with the displacement axis (121) of the assembly.

12. Electronic valve according to any of the preceding claims, wherein the variable geometry profile body of the piston (13, 23, 33) is of frustoconical geometry.

13. Electronic valve according to any of claims 1 to 11, wherein the variable geometry profile body of the piston (13, 23, 33) is of elliptical geometry.

14. Electronic valve according to any of claims 1 to 11, wherein the variable geometry profile body of the piston (13, 23,33) is of a geometry composed of straight and / or curved sections without defining a specific geometric profile.

15. Electronic valve, according to any of the preceding claims, wherein the variable geometry profile body of the piston (23, 33) is configured such that the outer surface (232, 332) has a helical groove for the passage of liquid through it when the position of the piston (23, 33) with respect to the seat (14) and its mating surfaces on the seat (14) allow the passage of liquid towards the liquid outlet (19) of the valve body (11, 41).

16. Liquid regulating and supply device, wherein this device (100) includes at least one electronic valve (10, 20, 30, 40) with a linear drive motor and a control system that controls the actuation of the regulating system of the at least one electronic valve (10, 20, 30, 40).40) characterized in that the electronic valve (10, 20, 30, 40) is configured as indicated in any of claims 1 to 15.

17. Water regulating and supply device, according to claim 16, wherein this liquid regulating and supply device (100) is configured as a mixing box with an electronic valve (10, 20, 30, 40) as described in claims 1 to 15 for each of the liquid inlets (F, C) to said liquid mixing box.

18. Water regulating and supplying device, according to claim 16, wherein this liquid regulating and supplying device (100) is configured as an electronic tap with an electronic valve (10, 20, 30, 40) as described in claims 1 to 15 for each of the liquid inlets (F, C) to the electronic liquid regulating and supplying tap.

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