Flow meter, valve assembly and household appliance with variable inlet valve having a flow meter
By designing flow meters and valve assemblies that can be attached in multiple orientations, the problem of flow rate measurement in household appliance inlet valves under limited space and vibration environments has been solved, improving measurement reliability and reducing production costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- ZHEJIANG SANHUA INTELLIGENT CONTROLS CO LTD
- Filing Date
- 2021-06-10
- Publication Date
- 2026-05-29
Smart Images
Figure CN114981623B_ABST
Abstract
Description
Technical Field
[0001] The present invention generally relates to an improved inlet valve for a household appliance. The inlet valve includes a valve assembly and a flow meter capable of being attached to the valve assembly in an orientation selectable from a group including at least a first orientation and a second orientation. Background Technology
[0002] Household appliances that operate using water (such as washing machines or dishwashers) typically include an inlet valve for regulating and adjusting the amount of water supplied to the appliance from an external water source (such as a faucet). For this purpose, inlet valves known in the art typically include an inlet pipe, an outlet pipe, a controllable valve, and means for determining the flow rate of water through the inlet valve.
[0003] Designing inlet valves for household appliances presents various challenging technical requirements. In particular, a common limitation is the limited amount of available space inside the appliance. During operation, appliances, especially washing machines, can cause significant vibrations, increasing the demands on the assembly of individual components. Furthermore, components of household appliances must be able to operate in environments that potentially contain large amounts of water.
[0004] German utility model DE 20 201 8 100 215 U1 discloses an inlet valve in the form of a solenoid valve device, which includes a hollow valve body having an inlet for fluid (particularly water) flow and two outlets. Between the inlet and the two outlets, a chamber is defined within the valve body, in which a valve seat is disposed. The valve body is disposed within the valve seat for controlling communication between the inlet and outlets. In the inlet region of the valve body, an integral flow line for fluid flow is provided, wherein the flow line is configured to accommodate a turbine flow meter. The solenoid valve device also includes a receiving space for accommodating a control circuit board. The receiving space is located in the region of the flow line, and a plate seat is formed therein. The plate seat is located outside the flow line and is configured to accommodate the control circuit board. The control circuit board itself is equipped with a sensor for receiving signals provided by the turbine flow meter. The valve body and the receiving space are integrally formed from molded plastic. A double wall is formed by a portion of the peripheral wall defining the plate seat and the wall of the flow line. A portion of the peripheral wall portion is separated from the wall of the flow line by an air passage.
[0005] While inlet valves known in the art, such as the solenoid valve device of DE20 201 8 100 215 U1, are generally considered satisfactory given the aforementioned technical requirements, improvements to inlet valves are still needed. Furthermore, there is still a need to improve the economics of manufacturing inlet valves for household appliances. Summary of the Invention
[0006] In a first aspect, the present invention addresses the aforementioned need by providing a flow meter according to the invention for determining the fluid flow rate through an associated valve assembly. The flow meter includes a housing, a sensor device disposed within the housing, and a coupling portion disposed at the housing. The sensor device includes at least one sensor configured to detect an amount indicating the fluid flow rate through the valve assembly. The coupling portion is configured to engage with an associated reverse coupling portion of the valve assembly for coupling the flow meter to the valve assembly in an orientation relative to the valve assembly, the orientation being selectable from a group including at least a first orientation and a second orientation.
[0007] In a second aspect, the present invention addresses the aforementioned needs by providing a valve assembly as defined according to the invention, the valve assembly comprising a valve body, at least one valve, a flow indicator, and a reverse coupling portion. The valve body includes at least one inlet pipe, at least one outlet pipe, and a flow path connecting the at least one inlet pipe and the at least one outlet pipe. The at least one valve is configured to control the fluid flow rate through the flow path. The flow indicator is configured to provide an amount indicating the fluid flow rate through the flow path, the amount being detectable by a sensor of an associated flow meter. The reverse coupling portion is configured to connect to an associated coupling portion of the flow meter of the first aspect for connecting the flow meter to the valve assembly in an orientation relative to the valve assembly, the orientation being selectable from a group including at least a first orientation and a second orientation.
[0008] In a third aspect, the present invention addresses the aforementioned needs by providing an inlet valve for a household appliance (such as a washing machine), wherein the inlet valve, in a preferred embodiment, defines and includes the valve assembly of the second aspect and the flow meter of the first aspect.
[0009] In a fourth aspect, the present invention addresses the above-mentioned needs by providing a household appliance (such as a washing machine), which, in a preferred embodiment, defines and includes the valve assembly of the second aspect.
[0010] This invention enables the flow meter to be attached to the valve assembly in different orientations, such as orientations freely selectable from a group including at least a first orientation and a second orientation. Therefore, this invention can meet the space constraints of different household appliances (such as washing machines) by connecting the flow meter of the first aspect to the valve assembly of the second aspect in a suitable orientation from the available options. Thus, the flow meter of the first aspect, the valve assembly of the second aspect, and the inlet valve of the third aspect can be easily used in different types of washing machines without substantial modifications (if any).
[0011] It must be understood that the present invention is not limited to a set of orientations including a first orientation and a second orientation, wherein the flow meter is selectively attached to the valve assembly. As will be clear from the following description, the flow meter according to the first aspect, the valve assembly according to the second aspect, the inlet valve according to the third aspect, and the household appliance according to the fourth aspect may optionally allow the flow meter to be selectively attached to the valve assembly in more than two orientations, such as at least three orientations, at least four orientations, at least five orientations, or at least six or more orientations.
[0012] In a preferred embodiment, and in all aspects of the invention, the coupling portion is configured to be removably coupled to a reverse coupling portion associated with the valve assembly. Therefore, the orientation selection is reversible, meaning the flow meter can be removed from the valve assembly and reconnected to it in a different orientation.
[0013] Alternatively or additionally, in all aspects of the invention, at least one sensor device is housed within the enclosure of the housing. Therefore, the sensor can be advantageously protected from contact with moisture and / or water.
[0014] Alternatively or additionally, in all aspects of the invention, the housing includes a mating surface, and the coupling portion is configured such that when the flow meter is coupled to the valve assembly in an orientation selectable from at least a first orientation and a second orientation, the mating surface engages an abutment surface of the valve assembly. Preferably, the valve assembly includes at least one abutment surface. The engagement between the mating surface and the abutment surface can help maintain a predetermined distance under different load conditions. Preferably, the sensor of the sensor device is disposed in the housing below the mating surface. Alternatively or additionally, the valve assembly includes a plurality of abutment surfaces, and the mating surface engages a selected abutment surface from the plurality of abutment surfaces according to a selected orientation in the set of orientations. In other embodiments, the valve assembly includes a single abutment surface, and the mating surface engages the single abutment surface in each orientation in the set of orientations.
[0015] Alternatively or additionally, in all aspects of the invention, the coupling portion is configured such that when the flow meter is coupled to the valve assembly in an orientation selectable from at least a first orientation and a second orientation, the coupling portion biases the mating surface against a corresponding abutment surface of at least one of the abutment surfaces. This biasing reduces the risk of the mating surface separating from the abutment surface due to external loads, such as vibrational acceleration. This increases the reliability of flow rate measurement by maintaining a predetermined distance with increased probability. In particular, it prevents the formation of gaps between the mating surface and the abutment surface.
[0016] Alternatively or additionally, in all aspects of the invention, the coupling portion includes a receiving portion configured such that when the flow meter is coupled to the valve assembly in an orientation optionally including at least a first orientation and a second orientation, the reverse coupling portion of the valve assembly is at least partially recessed into the receiving portion. Therefore, the overall size of the inlet valve can be advantageously reduced.
[0017] Alternatively or additionally, in all aspects of the invention, the connecting portion includes a plurality of connecting elements, wherein each connecting element is configured to engage a corresponding reverse connecting element among a plurality of reverse connecting elements of the reverse connecting portion. Preferably, each connecting element is configured to selectively engage each reverse connecting element. More preferably, each connecting element is configured to engage a selected reverse connecting element among a set of orientations. Preferably, the connecting portion includes at least a first connecting element and a second connecting element, wherein each of the at least first connecting element and the second connecting element is configured to engage a selected one of the at least first reverse connecting elements and the second reverse connecting element of the reverse connecting portion of the valve assembly to selectively secure the flow meter to an orientation selected from a group including at least a first orientation and a second orientation. Preferably, the first connecting element is configured to engage the first reverse connecting element in the first orientation and engage the second reverse connecting element in the second orientation. Alternatively and / or additionally, the second connecting element is configured to engage the second reverse connecting element in the first orientation and engage the first reverse connecting element in the second orientation.
[0018] Alternatively or additionally, in all aspects of the invention, the connecting portion includes a third leg and a fourth leg spaced apart to define the receiving portion therebetween.
[0019] Alternatively or additionally, in all aspects of the invention, the reverse connection portion includes a plurality of reverse connection elements, wherein each reverse connection element is configured to engage a corresponding connection element among the plurality of connection elements of the connection portion. Preferably, each reverse connection element is configured to selectively engage each of the connection elements. More preferably, each reverse connection element is configured to engage a selected connection element among the connection elements according to an orientation selected from a set of orientations. Preferably, the reverse connection portion includes at least a first reverse connection element and a second reverse connection element, wherein each of the at least first reverse connection element and the second reverse connection element is configured to engage a selected one of the at least first connection element and the second connection element of the reverse connection portion of the valve assembly to selectively secure the flow meter to an orientation selectable from a set of at least a first orientation and a second orientation. Preferably, the first reverse connection element is configured to engage the first connection element in the first orientation and engage the second connection element in the second orientation. Alternatively and / or additionally, the second reverse connection element is configured to engage the second connection element in the first orientation and engage the first connection element in the second orientation.
[0020] Alternatively or additionally, in all aspects of the invention, the first connecting portion is disposed at the first arm, and the second connecting portion is disposed at the second arm.
[0021] Alternatively or additionally, in all aspects of the invention, the reverse coupling portion is disposed at the annular outer surface of the wall of the valve body surrounding the flow path. Preferably, the annular outer surface is arranged concentrically with the flow axis defined by the flow path. Alternatively or additionally, the reverse coupling element is disposed at the annular outer surface of the wall of the valve body. Preferably, the reverse coupling elements are spaced apart around the annular outer surface at regular intervals. More preferably, the angle formed between two adjacent reverse coupling elements is equal to 360° divided by the total number of reverse coupling elements. For example, when the reverse coupling portion includes two reverse coupling elements, preferably, the two reverse coupling elements are spaced apart by 180° around the annular outer surface.
[0022] Alternatively or additionally, in all aspects of the invention, the connecting portion and / or the reverse connecting portion is configured such that when the flow meter is connected to the valve assembly in an orientation optionally including at least a first orientation and a second orientation, at least one sensor is in a detection position. The detection position is a position suitable for the sensor to detect an amount indicating the fluid flow rate.
[0023] Alternatively or additionally, in all aspects of the invention, the connecting portion and / or the reverse connecting portion is configured such that when the flow meter is connected to the valve assembly in an orientation optionally including at least a first orientation and a second orientation, at least one sensor is positioned at a predetermined distance from the flow indicator. In a particularly preferred embodiment, the predetermined distance is substantially equal in each orientation included in the group of orientations. This ensures that the prerequisite of reliable flow rate detection can be maintained in each orientation included in the group of orientations.
[0024] Alternatively or additionally, in all aspects of the invention, the connecting portion and / or the sensor device is integrally formed with the housing. Preferably, the connecting portion is molded together with the housing during a molding step. Preferably, the sensor is molded onto the sensor device. More preferably, the encapsulation portion of the housing is formed by molding the housing onto the sensor device. This greatly simplifies the production of the flow meter.
[0025] Alternatively or additionally, in all aspects of the invention, the reverse connection portion is integrally formed with the valve body. Preferably, the reverse connection portion is molded together with the valve body during the molding step.
[0026] Alternatively or additionally, in all aspects of the invention, the flow indicator includes an impeller disposed within a portion of the flow path. Preferably, the impeller is arranged such that its plane of rotation is perpendicular to the flow axis defined by the portion of the flow path. The impeller is configured to rotate by fluid flow in the flow path. Therefore, the rotational rate of the impeller indicates the fluid velocity flowing in the flow path. More preferably, the axis of rotation of the impeller coincides with the flow axis.
[0027] Alternatively or additionally, in all aspects of the invention, the detectable quantity is a magnetic field. Preferably, the magnetic field is provided by at least one magnetic portion of the flow indicator of the valve assembly. In another preferred embodiment, the magnetic portion comprises a material selected from the group consisting of ferrites and rare earth metals (e.g., neodymium). Rare earth metals (e.g., neodymium) may be preferred due to their magnetic properties. Ferrites may be preferred due to their price.
[0028] Alternatively or additionally, in all aspects of the invention, the predetermined distance is adapted to the magnetic portion. In a preferred embodiment, the predetermined distance is adapted to the material included in the magnetic portion. In a particularly preferred embodiment, the predetermined distance is adapted to a magnetic portion including ferrite. Alternatively or additionally, the predetermined distance is adapted to a magnetic portion including rare earth metals (such as neodymium). In a particularly preferred embodiment, the predetermined distance is the average between a predetermined distance adapted to a magnetic portion including ferrite and a predetermined distance adapted to a magnetic portion including rare earth metals (such as neodymium). Therefore, the invention can be used with both rare earth metal magnets (e.g., neodymium magnets) and ferrite magnets without having to change the dimensions of the flow meter or the valve assembly.
[0029] Alternatively or additionally, in all aspects of the invention, the impeller includes a magnetic portion. The magnetic portion is spaced at a distance from the axis of rotation of the impeller. Thus, changes in the magnetic field provided by the magnetic portion when rotating with the impeller indicate the fluid velocity in the flow path. Alternatively or additionally, the flow indicator includes a plurality of magnetic portions arranged with alternating polarities on a circle surrounding the flow axis defined by the flow path. Preferably, the plurality of magnetic portions are arranged on the impeller and radially aligned with the axis of rotation with alternating polarities. In other words, adjacent magnetic portions have opposite magnetic poles oriented radially outward. The alternating polarity provides a detectable change in polarity as another indication of flow velocity and / or as a measure to perform a consistency check on the detected magnetic field.
[0030] Alternatively or additionally, in all aspects of the invention, the sensor of the flow meter's sensor device is a Hall sensor. The Hall sensor allows the flow meter to detect an amount indicating the flow velocity in the flow path while physically separated from it. In particular, the Hall sensor allows the detection of a magnetic field provided by the flow indicator. However, it must be understood that any other combination of sensors and indicators known in the art and capable of measuring the impeller's rotational speed can be used alternatively, such as a capacitive sensor, where the detectable quantity is an electric field.
[0031] Alternatively or additionally, in all aspects of the invention, each orientation included in the orientation group is located in a common plane. In another preferred embodiment, the common plane is arranged perpendicular to the flow axis defined by the flow path. In a further or additional preferred embodiment, the common plane corresponds to the plane of rotation of the impeller of the flow indicator. In a further or additional preferred embodiment, the detection position is located in the common plane. Alternatively or additionally, the predetermined distance is a distance in the common plane.
[0032] Alternatively or additionally, in all aspects of the invention, the orientations included in the orientation group are arranged on a circle concentric with the flow axis defined by the flow path. Preferably, the orientations included in the orientation group are defined by the orientation of the major axis of the flow meter (such as the axis of symmetry of the flow meter) in a plane perpendicular to the flow axis. More preferably, the circles on which the orientations are arranged are arranged in a plane perpendicular to the flow axis. Alternatively or additionally preferably, the orientations included in the set of orientations are defined by a vector extending radially outward from the flow axis. Preferably, the orientations are arranged at regular intervals along the circumference of the circle. Alternatively or additionally, the angle formed between two adjacent orientations (i.e., two orientations adjacent to each other in the circumferential direction of the circle) is equal to 360° divided by the number of orientations included in the orientation group. Alternatively or additionally, the angle formed between adjacent orientations is 180°, 120°, 90°, 72°, 60°, or 45°.
[0033] Alternatively or additionally, in all aspects of the invention, each orientation included in the orientation group is aligned with a radial direction extending from the flow axis formed by the flow path.
[0034] It must be understood that this invention is not limited to use in household appliances. As will be clearly seen from the following description, this invention is readily applicable to any application requiring the determination and / or control of fluid flow rates. In some embodiments of the first, second, third, or fourth aspects of the invention, the flow meter is configured to determine and / or control the flow rate of a liquid. In a preferred embodiment, the liquid is water. In other preferred embodiments, the liquid is a substance other than water, such as oil. Alternatively or additionally, the first, second, third, or fourth aspects of the invention are configured to determine and / or control the fluid flow rate of a gas.
[0035] Alternatively or additionally, in all aspects of the invention, the valve assembly has at least one inlet conduit (e.g., one, two, three, or four inlet conduits) and more than two outlet conduits, such as three or more outlet conduits, four or more outlet conduits, or five or more outlet conduits. Alternatively or additionally, the valve assembly has at least one outlet conduit (e.g., one, two, three, or four outlet conduits) and more than one inlet conduit, such as two or more outlet conduits, three or more outlet conduits, or four or more outlet conduits.
[0036] Other advantages and preferred embodiments of the invention will now be described in conjunction with the accompanying drawings. Attached Figure Description
[0037] Figure 1 An embodiment of the inlet valve according to the present invention is shown;
[0038] Figure 2 yes Figure 1 A top view of the inlet valve, in which the flow meter is arranged in a second orientation;
[0039] Figure 3 yes Figure 1 A top view of the inlet valve, wherein the flow meter is arranged in a first orientation;
[0040] Figure 4 An embodiment of the flow meter according to the present invention is shown;
[0041] Figure 5 Depicting Figure 1 or Figure 4 The sensor device of the flow meter relative to Figure 1 The position of the flow indicator of the valve assembly of the inlet valve;
[0042] Figure 6 yes Figure 1 A front view of the inlet valve, with parts of the flow meter and valve assembly removed;
[0043] Figure 7 An inlet valve is provided in the... Figure 2 The dashed lines shown indicate a cross-sectional view in a plane;
[0044] Figure 8 An embodiment of the inlet valve is provided by Figure 7 The dashed lines shown indicate a detailed cross-sectional view in the plane. Detailed Implementation
[0045] exist Figures 1 to 8 A preferred embodiment of an inlet valve V is depicted, and the inlet valve V includes a valve assembly 10 and a flow meter 100 removably attached to the valve assembly 10. As described above, the present invention enables the flow meter 100 to be attached to the valve assembly 10 in an orientation selectable from a set of different orientations, for example, in a first orientation (e.g., as shown in the image). Figure 1 and Figure 3 (as shown) and second orientation (e.g., as shown) Figure 2 One of the available orientations (as shown in the figure).
[0046] In a preferred embodiment of the invention, the inlet valve V is configured for a household appliance. Figures 1 to 8 In a particularly preferred embodiment, the inlet valve V is configured for use in a washing machine. In other preferred embodiments, the inlet valve V may be configured for use in a dishwasher. When used in a washing machine or dishwasher, the inlet valve V is configured to release detergent from one or more detergent reservoirs of the washing machine or dishwasher. For this purpose, the inlet valve V is configured to control the flow of water from an external water source to one or more detergent containers from which detergent is rinsed onto the application site.
[0047] exist Figures 1 to 8 In the particularly preferred embodiment shown, valve assembly 10 includes a valve body 12 forming an inlet pipe 16, a first outlet pipe 18, and a second outlet pipe 20. The inlet pipe 16 is configured to connect to an external water supply line, such as a faucet. The inflow IF is provided by an external water source and enters valve assembly 10 through inlet pipe 16. The first outlet pipe 18 and the second outlet pipe 20 are configured to connect to an internal water distribution line (not shown) of the washing machine. The first outlet pipe 18 can be connected to a first detergent reservoir via a first internal water distribution line. Similarly, the second outlet pipe can be connected to a second detergent reservoir via a second internal water distribution line. Figure 2 As shown by the solid black line, flow path 14 is formed in valve body 12. Flow path 14 extends from inlet pipe 16 to first outlet pipe 18 and second outlet pipe 20, allowing the inflow IF entering at inlet pipe 16 to pass through valve assembly 10 and exit as first outflow OF1 via first outlet pipe 18 and as second outflow OF2 via second outlet pipe 20. At junction 15, flow path 14 branches into a first branch 14a leading to first outlet pipe 18 and a second branch 14b leading to second outlet pipe 20.
[0048] In the illustrated embodiment, the inlet pipe 16, the first outlet pipe 18, and the second outlet pipe 20 are each formed by a cylindrical protrusion 17 forming the inlet pipe 16, a cylindrical protrusion 19 forming the first outlet pipe 18, and a cylindrical protrusion 21 forming the second outlet pipe 20, respectively, from the valve body 12. The cylindrical protrusion 17 forming the inlet pipe 16 has a threaded outer surface that can be connected to a corresponding threaded portion of an external water supply line. Similarly, the cylindrical protrusion 19 forming the first outlet pipe 18 and the cylindrical protrusion 21 forming the second outlet pipe 20 each have a threaded outer surface that can be connected to a corresponding threaded portion of a corresponding internal water distribution line. It must be understood that any other flow bearing coupling known in the art can be used instead of a threaded connection, such as an interference fit coupling or a press fit coupling.
[0049] To control the first outflow OF1 and the second outflow OF2, valve assembly 10 includes a first valve (not shown) and a second valve (not shown). A first valve seat 38 is formed in valve body 12 and configured to receive the first valve. The first valve seat 38 is positioned downstream of junction 15 and above a first branch 14a of flow path 14. The first valve seat 38 is configured such that a control element of the first valve can extend into the first branch 14a to regulate the available flow cross-section of the first branch 14a. Similarly, a second valve seat 39 is positioned downstream of junction 15 and above a second branch 14b of flow path 14. The second valve seat 39 is configured such that a control element of the second valve can extend into the second branch 14b to regulate the available flow cross-section of the second branch 14b. By controlling the available flow cross-sections of the first branch 14a and the second branch 14b, valve assembly 10 controls the flow rate of the first outflow OF1 and the second outflow OF2 according to the flow rate of the inflow IF. The first and second valves are configured to receive input signals from the electronic control unit of the washing machine and adjust their respective flow cross-sections accordingly. Any type of valve known in the art that can be controlled by an electronic control unit and has an adjustable flow path cross-section is suitable for all aspects of the invention. In a preferred embodiment, the first and second valves are electromechanically operated valves, particularly solenoid valves. Figures 1 to 8 In a particularly preferred embodiment, the washing machine is configured to adjust the flow rate of the first outflow OF1 according to the amount and / or type of detergent present in the first detergent reservoir. Similarly, the washing machine is configured to adjust the flow rate of the second outflow OF2 according to the amount and / or type of detergent present in the second detergent reservoir. In a particularly preferred embodiment, the washing machine is configured such that the first outflow OF1 and the second outflow OF2 are simultaneously supplied to flush the third detergent reservoir.
[0050] It must be understood that the present invention is not limited to Figures 1 to 8 The preferred embodiment specifies the number of inlet and outlet pipes. It is generally sufficient for valve assembly 10 to have at least one inlet pipe and at least one outlet pipe, and the specific number of inlet and outlet pipes can be adjusted as needed.
[0051] As will be explained in more detail below, valve assembly 10 also includes a reverse coupling portion 28 configured to engage with coupling portion 104 of flow meter 100 to selectively and removably attach flow meter 100 in either a first or second orientation. Valve assembly 10 further includes at least one flow indicator 22 configured to provide an indication of the amount of fluid flow through flow path 14, the amount of which can be detected by sensor 108 of flow meter 100.
[0052] like Figure 4As shown, the flow meter 100 is configured to be separate from and removably attached to the valve assembly 10. The flow meter 100 is configured to determine the fluid velocity of the inflow flow IF at the inlet pipe 16, thereby enabling the washing machine's electronic control unit to control the first and second valves of the valve assembly 10 as needed. The flow meter 100 includes a housing 102 that houses a sensor device 106 including at least one sensor 108. As will be explained in more detail below, the flow meter 100 includes a coupling portion 104 configured to selectively and removably attach the flow meter 100 to the valve assembly 10 in either a first or second orientation.
[0053] Figure 5 , Figure 7 and Figure 8 A cross-sectional view reveals the sensor device 106, which is in Figure 4 It is obscured and not visible by the casing 102. Figures 1 to 8 In a preferred embodiment, the sensor device 106 further includes a circuit board 130 carrying circuitry 131 for processing signals received from the sensor 108. The circuit board 130 also includes a plurality of contact terminals 128 disposed on a portion of the circuit board 130 forming a contact portion 136. The sensor 108 and circuitry 131 are disposed on a portion of the circuit board 130 forming a circuit portion 135, wherein the sensor 108 is located at an end of the circuit portion 135 opposite to the end of the circuit portion 135 and the contact portion 136 adjacent to it. The housing 102 includes an encapsulation portion 132 that partially covers the circuit board 130 (made of…). Figure 5 (Indicated by dashed lines), such that circuitry 131 and sensor 108 are located within package 132, and contact terminals 128 are located outside package 132. In other words, contact portion 136 corresponds to a portion of circuit board 130 located outside package 132. As will be described in the following sections, package 132 forms a waterproof barrier around circuit board 130. Housing 102 also includes planar mating surfaces 112 on its outer surface. For example, in Figure 6 and Figure 7 As can be seen, sensor 108 is positioned below mating surface 112 inside housing 102.
[0054] Contact terminal 128 is configured to be contacted via a corresponding contact terminal of a data cable (not shown) connected to the electronic control unit of the washing machine. In other words, the flow meter 100 includes a data link configured to provide signals received from sensor 108 to the control unit of the washing machine. Figures 1 to 8In one embodiment, the housing 102 of the flow meter 100 includes a connection portion 110 forming a socket 134, with contact terminals 128 positioned within the socket 134. The socket 134 is configured to receive a corresponding plug of a data cable. It must be understood that the flow meter 100 may include an alternative data link. In some preferred embodiments, the data link is provided by a wireless connection, thereby eliminating the need for the connection portion 110, socket 134, and contact terminals 128. In other preferred embodiments, the wireless data link is combined with a connection portion configured to connect to a power cord. Figures 1 to 8 In one embodiment, power is supplied to the flow meter 100 at the contact terminal 128.
[0055] exist Figure 5 In this configuration, the sensor device 106 of the flow meter 100 is removed from the housing 102 and exposed for observation. The sensor device 106 includes a circuit board 130 and a support structure 138. The circuit board 130 is disposed on the top surface of the main portion of the support structure 138, thereby leaving the top surface of the circuit board 130 (on which the circuit 131, sensor 108, and contact terminal 128 are placed) uncovered. The main portion of the support structure 138 includes a circuit portion 138a and a terminal portion 138b. The circuit portion 135 of the circuit board 130 is disposed on the circuit portion 138a, and the contact portion 136 of the circuit board 130 is disposed on the terminal portion 138b. Figure 5As shown, the support structure 138 is substantially symmetrical in shape, with its corresponding axis of symmetry extending from the circuit portion 138a to the terminal portion 138b. A first leg 142 and a second leg 144 extend from opposite sides of the main portion of the support structure 138. The first leg 142 includes a first base portion 142a and a first extension portion 142b, and the second leg 144 includes a second base portion 144a and a second extension portion 144b. The first base portion 142a and the second base portion 144a are angled to the axis of symmetry of the support structure 138, and the first extension portion 142b and the second extension portion 144b are substantially parallel to the axis of symmetry of the support structure 138. The first base portion 142a and the second base portion 144a connect the corresponding first leg 142 and second leg 144 to the main portion of the support structure 138 at the boundary region between the circuit portion 138a and the terminal portion 138b. The first base portion 142a and the second base portion 144a then extend outward from the main portion and in a direction away from the terminal portion 138b. The first extension portion 142b and the second extension portion 144b extend at an angle from their respective ends in a direction away from the terminal portion 138b. The first extension portion 142b and the second extension portion 144b are substantially parallel to each other. The support structure 138 is substantially flat, i.e., its thickness is substantially smaller than its width and length. In some embodiments, the top surface of the support structure 138 is flat. In some embodiments, the top surface of the support structure 138 is structured. In a particularly preferred embodiment, a portion of the top surface of the support structure 138 forming part of the socket 134 is recessed compared to the rest of the top surface.
[0056] In a preferred embodiment, manufacturing the flow meter 100 includes a multi-step molding process. The molding process is particularly preferred due to its potential to save production costs for the flow meter 100. In a first molding step, a support structure 138 is molded. The circuit board 130 can be attached to the support structure 138 in a separate step after the first molding step. In a preferred embodiment, the support structure 138 is molded onto the circuit board 130, thereby eliminating the need for a separate attachment step. In a second molding step, the housing 102 is molded onto the sensor device 106. The encapsulation portion 132 of the housing 102 is formed from a portion of molding material covering the remaining exposed portions of the circuit board 130, excluding the contact portion 136. Figures 1 to 8 In this embodiment, the remaining exposed portion of the circuit board 130 is its top surface, which faces... Figure 5 The observer's orientation in the image. Forming the package 132 in this way is particularly preferred because it may reduce the effort required to seal the circuit 131 to prevent water ingress compared to conventional methods.
[0057] exist Figures 1 to 8 In a particularly preferred embodiment, during the second molding step, the connecting portion 104 is integrally formed with the housing 102. When integrally formed, the housing 102 and the connecting portion 104 form an integral flowmeter housing 140. In an alternative embodiment, the housing 102 and the connecting portion 104 are formed separately and joined in a subsequent step to form the flowmeter 100.
[0058] When formed in the multi-step molding process described above, the housing 102, the connecting portion 104, and the support structure 138 each comprise a molding material, preferably a thermoplastic, thermosetting, or elastomeric polymer or any suitable combination thereof. In some embodiments, the same molding material is used for the housing 102, the connecting portion 104, and the support structure 138. In other embodiments, the housing 102, the connecting portion 104, and the support structure 138 are formed from different molding materials.
[0059] like Figure 4 As best shown, the connecting portion 104 includes a third leg 120 and a fourth leg 122 extending in a direction away from the housing 102. Each of the third leg 120 and the fourth leg 122 includes a corresponding third base portion 120a, a fourth base portion 122a, and a corresponding third extension portion 120b and a fourth extension portion 122b. The third base portion 120a connects the third leg 120 to the connecting portion 110 of the housing 102. Similarly, the fourth base portion 122a connects the fourth leg 122 to the connecting portion 110 of the housing 102. Each of the third base portions 120a and the fourth base portions 122a extends at an angle from opposite sides of the housing 102 in a direction away from the connecting portion 110. The third extension portions 120b and the fourth extension portions 122b extend parallel to each other at an angle from their respective third base portions 120a and fourth base portions 122a and extend in a direction away from the connecting portion 110. Therefore, the third leg 120 and the fourth leg 122 of the connecting portion 104 are similar in shape to the first leg 142 and the second leg 144 of the support structure 138. When formed in the above two-step molding process, the third leg 120 and the fourth leg 122 are formed from the molding material surrounding the first leg 142 and the second leg 144. The space separating the third leg 120 and the fourth leg 122 defines a receiving portion 124 for receiving at least a portion of the reverse connecting portion 28 of the valve assembly 10 therein. For example, as... Figure 7As shown, the third extension 120b and the fourth extension 122b of the connecting portion 104 are longer than the first extension 142b and the second extension 144b of the support structure 138, meaning they extend further away from the housing 102. The receiving portion 124 is located in the space provided by the additional length of the third extension 120b and the fourth extension 122b. When the flow meter 100 is attached to the reverse connecting portion 28 of the valve assembly 10, a portion of the valve assembly 10 forming the reverse connecting portion 28 is partially recessed into the receiving portion 124, thereby reducing the overall size of the inlet valve V.
[0060] Figure 7 Is Figure 2 A view of the inlet valve V, taken from the plane indicated by the dashed line 7-7. Figure 8 In the middle, the section of inlet valve V along Figure 7 The dotted line in the middle indicates a cut (8-8). For example... Figure 4 , Figure 7 and Figure 8 As shown, the connecting portion 104 also includes a first connecting element 114 and a second connecting element 116. Figures 1 to 8 In one embodiment, the first connecting element 114 is integrally formed with the third leg 120 and extends from the housing 102 in a direction away from the connecting portion 110. Similarly, the second connecting element 116 is integrally formed with the fourth leg 122 and extends from the housing 102 in a direction away from the connecting portion 110. The first connecting element 114 and the second connecting element 116 each include a corresponding first connecting portion 114a and a second connecting portion 116a connecting the first connecting element 114 and the second connecting element 116 to the housing 102. Figures 1 to 8In the embodiments described, the first connecting portion 114a and the second connecting portion 116a are formed of a molding material that fills the space between the housing 102 and the corresponding third leg 120 and fourth leg 122, the space being created by the corresponding third base portion 120a and fourth base portion 122a extending away from the housing 102. The first connecting element 114 and the second connecting element 116 each also include a corresponding first retaining portion 114b and a second retaining portion 116b. In the depicted embodiment, the first retaining portion 114b and the second retaining portion 116b branch into a pair of parallel first pins 150a, second pins 150b, third pins 154a, and fourth pins 154b. The first pins 150a, second pins 150b, third pins 154a, and fourth pins 154b terminate in corresponding first locking lugs 152a, second locking lugs 152b, third locking lugs 156a, and fourth locking lugs 156b. The first locking lug 152a, the second locking lug 152b, the third locking lug 156a, and the fourth locking lug 156b are substantially arrow-shaped, with their pointed ends defining the increased width portions of the first retaining portion 114b and the second retaining portion 116b.
[0061] exist Figure 7 and Figure 8 The reverse connection portion 28 of the valve assembly 10, best shown in the diagram, is disposed at the wall 36 of the valve body 12, which surrounds the flow path 14 in the section downstream of the inlet pipe 16 and upstream of the junction 15. Figure 8 (The dashed lines in the diagram). Wall 36 includes an annular outer surface 37, with upstream wall segment 50 and downstream wall segment 52 extending radially outward from the annular outer surface 37. A reverse connection portion 28 is defined between the upstream wall segment 50 and the downstream wall segment 52. A first support 54 and a second support 56 extend radially outward from the outer surface 37. The first support 54 and the second support 56 form reverse connection elements of the reverse connection portion 28 and are in a plane perpendicular to the flow path 14 (i.e., in...). Figure 7 (In a plane) arranged at 180° intervals from each other. For example... Figure 7 As shown by the dashed line in 8-8, Figure 8 The view cuts through the first support 54 and visualizes how each of the first support 54 and the second support 56 connects the upstream wall segment 50 and the downstream wall segment 52. The first support 54 and the second support 56 each include an eyelet 58 formed by corresponding openings in the first support 54 and the second support 56 extending in a direction substantially tangential to the annular outer surface 37 at corresponding locations in the first support 54 and the second support 56. Figure 8As shown, corresponding first notches 59 and second notches 60 are formed in the upstream wall section 50 and downstream wall section 52 adjacent to the first support 54. Corresponding notches (not shown) are formed adjacent to the second support 56. The first notches 59 and second notches 60 are optional and can provide further safety to prevent the flow meter 100 from accidentally detaching from the valve assembly 10. The wall portion 36 also includes a pair of abutment surfaces 30 arranged on opposite sides of the valve body 12. The abutment surfaces 30 extend parallel to the flow path 14 and perpendicular to the direction defined by the axis of the orifice 58 extending through the first support 54 and the second support 56.
[0062] To attach the flow meter 100 to the valve assembly 10, the flow meter 100 is positioned such that the receiving portion 124 is oriented toward the reverse connection portion 28. The connection portion 104 is positioned between the upstream wall 50 and the downstream wall 52. The first connecting element 114 is aligned with the eyelet 58 of the first bracket 54, and the second connecting element 116 is aligned with the eyelet of the second bracket 56. The flow meter 100 is then advanced such that the first connecting element 114 and the second connecting element 116 are simultaneously screwed into the corresponding eyelets of the first bracket 54 and the second bracket 56. The first pin 150a, the second pin 150b, the third pin 154a, and the fourth pin 154b are generally shaped to follow the contour of the annular outer surface 37 of the reverse connection portion 28. This facilitates the advancement of the receiving portion 124 on the reverse connection portion 28. Referring now to Figure 8 The connections between the first connecting element 114, the second connecting element 116, the first support 54, and the second support 56 are explained in connection with the depicted connection between the first connecting element 114 and the first support 54. It must be understood that the connection between the second connecting element 116 and the second support 56 is established accordingly. The eyelet 58 provides an opening narrower than the width of the second retaining portion 116b defined by the opposing first locking lugs 152a and second locking lugs 152b. As... Figure 4As shown, the first locking lug 152a and the second locking lug 152b are connected only to the corresponding first pin 150a and second pin 150b, and are separated from the fourth extension portion 122b by a slit 151a between the first pin 150a and the second pin 150b. Therefore, the first locking lug 150a and the second locking lug 150b of the first retaining portion 114b are configured to resiliently push towards each other. As described above, each of the locking lugs 152a and 152b is generally arrow-shaped. To screw the first connecting element 114 into the eyelet 58 of the first bracket 54, the chamfered front ends 153a of the arrow-shaped first locking lug 152a and 153b of the second locking lug 152b are configured to resiliently push the pair of first locking lugs 152a and 152b toward each other, allowing the tips of the first locking lugs 152a and 152b to pass through the eyelet 58. The first locking lugs 152a and 152b are configured to spring back to their undeformed form once the tip portion has passed through the eyelet 58. The arrow-shaped first locking lugs 152a and 152b are configured to engage corresponding first recesses 59 and second recesses 60. As described above, the first recesses 59 and 60 are optional and can provide further security against accidental separation of the flow meter 100 and valve assembly 10. Figure 8 As shown, the rear end 155a of the first locking lug 152a and the rear end 155b of the second locking lug 152b are configured to... Figure 8 The first bracket 54 engages to prevent the first connecting element 114 from being accidentally removed from the eyelet 58. The rear ends 155a of the first locking lug 152a and 155b of the second locking lug 152b are preferably chamfered at an angle configured to allow tool-less removal of the first connecting element 114 from the first bracket 54, and thus tool-less removal of the flow meter 100 from the valve assembly 10. Because the rear ends 155a of the first locking lug 152a and 155b of the second locking lug 152b engage with the first bracket 54, the risk of accidental separation of the flow meter 100 from the valve assembly 10 is potentially reduced, even if the inlet valve V is subjected to strong vibrations.
[0063] The symmetrical arrangement of the first bracket 54 and the second bracket 56 on the annular outer surface 37 allows the first connecting element 114 and the second connecting element 116 to be inserted into the corresponding orifice 58 from either side of the first bracket 54 or the second bracket 56. Therefore, in a preferred embodiment, the flow meter 100 can be selectively attached to the valve assembly 10 in either the first or second orientation. The first orientation is... Figure 1 , Figure 3 and Figure 6 The description in the text indicates that the second orientation is... Figure 2 , Figure 5 , Figure 7 and Figure 8 Depicted in [the text]. Figures 1 to 7 In this configuration, the orientation of the flow meter 100 relative to the valve assembly 10 is defined by the orientation of the axis of symmetry of the flow meter 100 in a plane perpendicular to the flow axis of the flow path 14, which extends coaxially through and is surrounded by the wall 36. This plane coincides with the plane of rotation of the impeller 40, which will be described later. Figure 1 , Figure 3 and Figure 6 and Figure 2 , Figure 5 , Figure 7 and Figure 8 A comparison reveals that the first and second orientations are spaced 180° apart in the plane. In other preferred embodiments, the inlet valve V is configured such that the flow meter 100 can be selectively attached to the valve assembly 10 in more than two orientations. In a particularly preferred embodiment, the valve assembly 10 includes two pairs of supports, i.e., four supports, evenly spaced around the annular outer surface 37. In such an embodiment, the flow meter 100 is configured such that the first coupling element 114 and the second coupling element 116 can be selectively coupled to either pair of supports. In other words, in such an embodiment, the flow meter 100 can be selectively attached to the valve assembly 10 in any of the first, second, third, and fourth orientations. The number and spacing of the supports spaced around the annular outer surface 37 can be adjusted to select the number of available orientations as needed. The potential advantage of being able to select from different orientations when attaching the flow meter 100 stems from… Figure 2 and Figure 3 The advantages are obvious. By arranging the flow meter 100 in a suitable orientation, and particularly by selecting the orientation of the connection 110, the inlet valve V can be adapted to the packaging limitations of different washing machines. Therefore, the inlet valve V is not limited to use in a specific type of washing machine, but can be used in different types and series with only minor modifications (if any).
[0064] Now go to Figure 5 , Figure 6 and Figure 7 The valve assembly 10 includes a flow indicator 22, which is configured to provide an indication of the amount of fluid flowing through the flow path 14. Figures 1 to 8In this embodiment, the flow indicator 22 includes an impeller 40 placed in the flow path 14 perpendicular to the direction of fluid flow. A first magnet 24 and a second magnet 26 are arranged on opposite blades of the impeller 40. Since the connecting portion 104 is attached to the reverse connecting portion 28, the flow meter 100 is positioned such that the sensor 108 is located in the plane of rotation of the impeller 40, and therefore in the plane of rotation of the magnets 24, 26. The sensor 108 in the depicted embodiment is a Hall sensor that detects the magnetic field of the magnets 24, 26 passing below the sensor 108 to determine the rotational rate of the impeller 40, and thus allows the circuit 131 and / or the control unit of the washing machine to determine the fluid velocity in the flow path 14. In other words, the detectable quantity in the depicted embodiment is a magnetic field.
[0065] To reliably detect magnetic fields, the Hall sensor needs to be placed at a specific distance relative to the magnetic field source (i.e., the magnets 24 and 26 of the impeller 40). For example... Figure 6 , Figure 7 and Figure 8 As shown, the mating surface 112 of the housing 102 contacts the abutment surface 30 25. The wall thickness of the housing 102 at the mating surface 112 and the wall thickness of the wall portion 36 at the abutment surface 30 space the sensor 108 and the impeller 40 apart by a predetermined distance. In a preferred embodiment, the connecting portion 104 is configured such that the mating surface 112 is biased against the abutment surface 30. Figures 1 to 8 In a particularly preferred embodiment, the dimensions of the first connecting element 114 and the second connecting element 116 are selected such that when the flow meter 100 is attached to the valve assembly 10, a tensile force is applied through the first locking lug 152a, the second locking lug 152b, the third pin 154a, and the fourth pin 154b to press the mating surface 112 against the abutment surface 30. In this particularly preferred embodiment, the tensile force is a result of the elastic stretching of the first connecting element 114 and the second connecting element 116. Therefore, even under increased vibration loads, the risk of separation of the mating surface 112 from the abutment surface 30 is reduced, thereby increasing the distance between the sensor 108 and the impeller 40 and the magnets 24, 26. In other words, the present invention can increase the reliability of flow rate measurement by maintaining a predetermined distance with an increased probability. The predetermined distance is selected according to the type of magnet used. In some embodiments, the predetermined distance is configured for ferrite magnets. In other embodiments, the predetermined distance is configured for rare earth metal magnets, such as neodymium magnets. In a particularly preferred embodiment, the predetermined distance is the average of the predetermined distance between the ferrite magnet and the predetermined distance between the rare earth metal magnet (e.g., neodymium magnet). Therefore, in this invention, rare earth metal magnets (such as neodymium magnets) and ferrite magnets can be used together without changing the dimensions of the flow meter 100 or valve assembly 10.
[0066] In other embodiments, the flow indicator 22 includes one, three, four, five, six, or more magnets. Increasing the number of magnets can increase the temporal resolution of the flow rate measurement. In a preferred embodiment, the magnets of the impeller 40 are radially aligned, i.e., the first pole of the respective magnet is radially inwardly oriented, and the second pole of the respective magnet is radially outwardly oriented. In a particularly preferred embodiment, the magnets of the impeller 40 are arranged with alternating polarities along the circumferential direction of the impeller 40, for example... Figure 5 As shown. The first magnet 24 is arranged such that the south pole S is radially outward and the north pole N is radially inward, and the second magnet 26 is arranged such that the north pole N is radially outward and the south pole S is radially inward. Alternating polarity is particularly preferred because the change in magnet polarity generated when subsequent magnets pass under the sensor 108 can be used to increase the sensitivity and / or reliability of the flow velocity measurement. In other embodiments, the magnets of the impeller 40 are arranged along the circumferential direction of the impeller 40, wherein each magnet has the same orientation, i.e., the magnets are aligned such that the radially outward magnetic poles have the same polarity.
[0067] Figure Labels
[0068] 10 Valve Assembly
[0069] 12 Valve body
[0070] 14 Flow Path
[0071] 14a First Branch
[0072] 14b Second Branch
[0073] 15 Joint
[0074] 16 Inlet Pipe
[0075] 17. A cylindrical protrusion forming the inlet pipe 16
[0076] 18 First Export Pipeline
[0077] 19. A cylindrical protrusion forming the first outlet pipe 18.
[0078] 20 Second Outlet Pipeline
[0079] 21. A cylindrical protrusion forming the second outlet pipe 20.
[0080] 22 Flow Indicator
[0081] 24 First Magnet
[0082] 26 Second Magnet
[0083] 28 Reverse connection section
[0084] 30 contact surface
[0085] 36. Wall section
[0086] 37. Annular outer surface
[0087] 38 First valve seat
[0088] 39 Second valve seat
[0089] 40 Impeller
[0090] 50 Upstream wall section
[0091] 52 Downstream wall section
[0092] 54 First support
[0093] 56 Second support
[0094] 58 eyelets
[0095] 59 First notch
[0096] 60 Second notch
[0097] 100 Flow Meter
[0098] 102 Casing
[0099] 104 Connection Part
[0100] 106 Sensor Device
[0101] 108 sensors
[0102] 110 Connecting part
[0103] 112 mating surfaces
[0104] 114 First connecting element
[0105] 114a First connecting part
[0106] 114b First Holding Part
[0107] 116 Second connecting element
[0108] 116a Second connecting part
[0109] 116b Second Retention Section
[0110] 120 Third leg
[0111] 120a Third base section
[0112] 120b Third Extension
[0113] 122 The fourth leg
[0114] 122a Fourth base part
[0115] 122b Fourth Extension
[0116] 124 Acceptance Section
[0117] 128 contact terminals
[0118] 130 circuit board
[0119] 131 circuit
[0120] 132 Package Section
[0121] 134 socket
[0122] 135 Circuit Section
[0123] 136 Contact Department
[0124] 138 Supporting Structure
[0125] 138a Circuit Section
[0126] 138b terminal section
[0127] 140 Flowmeter Housing
[0128] 142 First leg
[0129] 142a First base portion
[0130] 142b First Extension
[0131] 144 Second leg
[0132] 144a Second base portion
[0133] 144b Second Extension
[0134] 150a First Pin
[0135] 150b Second Pin
[0136] 151a The slit between the first pin 150a and the second pin 150b
[0137] 152a First locking lug
[0138] 152b Second locking lug
[0139] 153a First locking lug 152a Chamfered front end
[0140] 153b Second locking lug, chamfered front end of 152b
[0141] 154a Third pin
[0142] 154b Fourth pin
[0143] 155a The rear end of the first locking lug 152a
[0144] 155b Second locking lug 152b rear end
[0145] 156a Third locking lug
[0146] 156b Fourth locking lug
[0147] IF Inflow
[0148] The north poles of magnets N at points 24 and 26
[0149] OF1 First-tier outflow
[0150] OF2 Second Stream Outflow
[0151] S, the south poles of magnets 24 and 26.
[0152] V Inlet Valve
Claims
1. A flow meter (100) for determining the fluid flow rate through an associated valve assembly (10), the flow meter (100) being an entity independent of the valve assembly (10) and removably attachable to the valve assembly (10), the flow meter (100) comprising: Casing (102); A sensor device (106) is disposed in the housing (102) and includes at least one sensor (108) configured to detect an amount provided by a flow indicator (22) of the valve assembly (10), the amount representing the fluid velocity through the flow path (14) of the valve assembly (10); as well as A coupling portion (104) is disposed at the housing (102) and configured to be coupled to an associated reverse coupling portion (28) of the valve assembly (10) for attaching the flow meter (100) to the valve assembly (10) in an orientation relative to the valve assembly (10), the orientation being selectable from the group including at least a first orientation and a second orientation.
2. The flow meter (100) according to claim 1, wherein, The connection portion (104) is configured to be removably connected to the associated reverse connection portion (28) of the valve assembly (10).
3. The flow meter (100) according to claim 1, wherein, The at least one sensor (108) is arranged in the encapsulation portion (132) of the housing (102).
4. The flow meter (100) according to any one of claims 1 to 3, wherein, The housing (102) includes a mating surface (112), and the connection portion (104) is configured such that when the flow meter (100) is connected to the valve assembly (10) in an orientation selected from the group including at least the first orientation and the second orientation, the mating surface (112) engages the corresponding abutment surface (30) of the valve assembly (10).
5. The flow meter (100) according to claim 4, wherein, The connection portion (104) is configured such that when the flow meter (100) is connected to the valve assembly (10) in an orientation selected from the group including at least the first orientation and the second orientation, the connection portion (104) biases the mating surface (112) against the corresponding abutting surface (30) of the valve assembly (10).
6. The flow meter (100) according to any one of claims 1 to 3, wherein, The connection portion (104) includes at least a first connection element (114) and a second connection element (116), wherein each of at least the first connection element (114) and the second connection element (116) is configured to engage the reverse connection elements of at least the first reverse connection element (32) and the second reverse connection element (34) of the reverse connection portion (28) of the valve assembly (10) in order to secure the flow meter (100) in an orientation selectable from the orientation group.
7. The flow meter (100) according to any one of claims 1 to 3, wherein, The connecting portion (104) and / or the sensor device (106) are integrally formed with the housing (102).
8. The flow meter (100) according to any one of claims 1 to 3, wherein, The amount indicating the fluid flow rate through the valve assembly (10) is provided by a magnetic field provided by the magnetic portion (24, 26) of a flow indicator (22) rotating in the valve assembly (10), the magnetic field being detectable by at least one sensor (108) of the sensor device (106); and When the flow meter (100) is coupled to the valve assembly (10) in an orientation selectable from the orientation group, the at least one sensor (108) is disposed at a predetermined distance from the valve assembly (10), the at least one sensor (108) being adapted to detect magnetic fields provided by magnetic portions (24, 26) including ferrite and magnetic portions (24, 26) including rare earth metals.
9. The flow meter (100) according to any one of claims 1 to 3, wherein, At least each of the first and second orientations is located in a common plane perpendicular to the flow axis defined by the flow path (14).
10. The flow meter (100) according to claim 9, wherein, The first orientation and the second orientation form a 180° angle in the common plane.
11. A valve assembly (10), comprising: The valve body (12) includes at least one inlet pipe (16), at least one outlet pipe (18, 20) and a flow path (14) connecting the at least one inlet pipe (16) and the at least one outlet pipe (18, 20). At least one valve, the at least one valve being configured to control the fluid flow rate through the flow path (14); A flow indicator (22), configured to provide an amount indicating the fluid velocity through the flow path (14), the amount being detectable by a sensor (108) of an associated flow meter (100), wherein the flow meter (100) is an entity independent of and removably attachable to the valve assembly (10); and A reverse connection portion (28) is configured to connect with an associated connection portion (104) of the flow meter (100) for connecting the flow meter (100) to the valve assembly (10) in an orientation relative to the valve assembly (10), the orientation being selectable from a group including at least a first orientation and a second orientation.
12. The valve assembly (10) according to claim 11, wherein, The reverse connection portion (28) is configured to be removably connected to the associated connection portion (104) of the flow meter (100).
13. The valve assembly (10) according to claim 11, wherein, The reverse connection portion (28) is disposed on the annular outer surface (37) of the wall (36) of the valve body (12) surrounding the flow path (14).
14. The valve assembly (10) according to any one of claims 11 to 13, wherein, The reverse connection portion (28) includes at least a first reverse connection element (32) and a second reverse connection element (34), each of the first reverse connection element (32) and the second reverse connection element (34) being configured to engage a connection element of at least a first connection element (114) and a second connection element (116) of the connection portion (104) of the flow meter (100) to secure the flow meter (100) to the valve assembly (10) in an orientation selectable from the orientation group.
15. The valve assembly (10) according to any one of claims 11 to 13, wherein, At least each of the first and second orientations is located in a common plane perpendicular to the flow axis defined by the flow path (14).
16. The valve assembly (10) according to claim 15, wherein, The first orientation and the second orientation form a 180° angle in the common plane.
17. An inlet valve (V) for a household appliance, said inlet valve (V) comprising a valve assembly (10) according to any one of claims 11 to 16 and a flow meter (100) according to any one of claims 1 to 10, wherein, The flow meter (100) is attached to the valve assembly (10) in an orientation selectable from at least a first orientation and a second orientation.
18. A household appliance comprising a valve assembly (10) according to any one of claims 11 to 16, wherein, The flow meter (100) according to any one of claims 1 to 10 is attached to the valve assembly (10) in an orientation selectable from at least a first orientation and a second orientation.