Valve housing and method of manufacturing a valve housing

Abstract

The invention relates to a valve housing for a fluid valve (1), comprising at least one fluid passage (11) for the passage of fluid, the valve housing (10) having a receiving space (12) for a valve closure body (2) which is movable in the valve housing (10), the receiving space (12) having an opening (12.1) through which the valve closure body (2) is introduced into the receiving space (12) of the valve housing (10), at least one first valve seat (13) being formed in the receiving space (12) and projecting into the receiving space (12) such that at least one undercut (13.1) is formed in the receiving space (12) by the first valve seat (13), the valve housing (10) being an injection-molded part which is formed in one piece, at least one valve seat (13) being integrally produced with the valve housing (10) by the injection-molding process.

Description

Technical Field

[0001] The present invention relates to a valve housing, a fluid valve comprising the valve housing, and a method for manufacturing the valve housing. Background Technology

[0002] Fluid valves used to control fluid flow are generally well-known. The fluids used are, in particular, liquids. These fluid valves are especially used in the food industry, for example, in water dispensers and coffee machines.

[0003] These fluid valves have a valve body with at least one fluid passage constructed within it. A valve shut-off body is located within the valve body, which is driven by a unit, specifically pivoting about a pivot axis. This pivoting presses a sealing diaphragm against a valve seat, thereby controlling the fluid flow through the valve.

[0004] A major drawback of known fluid valves is that the valve seat is composed of a component independent of the valve body, which is either inserted into or screwed into the valve body. The seat's mounting position can vary depending on whether it is inserted or screwed in, therefore, post-manufacturing calibration of the seat position is required to achieve the desired shut-off characteristics of the fluid valve. This process is time-consuming and expensive; furthermore, the functional quality of the fluid valve largely depends on the calibration accuracy provided by the corresponding operator, and thus, the functional quality of the fluid valve may experience undesirable fluctuations. Summary of the Invention

[0005] Based on this, the purpose of this invention is to provide a valve housing that is inexpensive to manufacture, has high-precision closing characteristics, and exhibits minimal fluctuations in production technology.

[0006] The solution of the present invention to achieve the above-mentioned objectives is a valve housing according to this application. This application also provides a fluid valve comprising a valve housing, and a method for manufacturing the fluid valve.

[0007] According to one aspect, a valve housing for a fluid valve is disclosed. The valve housing includes at least one fluid passage for fluid flow and a receiving space for a valve closing body capable of movement, particularly pivoting, within the valve housing. The receiving space has an opening through which the valve closing body is fed into the receiving space of the valve housing. At least one first valve seat is constructed within the receiving space, extending into the receiving space. Due to the extension of the first valve seat, at least one undercut is formed within the receiving space. The valve housing is a one-piece injection-molded part, wherein the at least one valve seat is integrally manufactured with the valve housing by an injection molding process. In other words, the valve seat is not embedded or screwed into the valve housing as a separate component, but is a direct component of the valve housing, thus integrally manufactured with the valve housing and connected to the valve housing in an inseparable manner.

[0008] The technical advantage of the valve body lies in the fact that by manufacturing the at least one valve seat using an injection molding process, structural tolerances are avoided or reduced, thus eliminating the need for fluid valve calibration. This reduces variations in the fluid valve's closing characteristics. Furthermore, it reduces installation costs, enabling the fluid valve to be manufactured more easily and at a lower cost.

[0009] According to one embodiment, in the accommodating space, the first valve seat is either directly opposite the second valve seat or directly opposite the stop portion for the valve closing body. This restricts the pivoting movement of the valve closing body by means of the opposing valve seat pairs, or by the valve seat and its opposing stop portion. By restricting the pivoting movement in this way, the pivotable or displaceable armature of the magnetic drive unit is also restricted, thus eliminating the need to calibrate the armature for the pivot angle or displacement path.

[0010] According to one embodiment, a second valve seat or a stop portion for the valve closing body extends into the receiving space, thereby forming at least one undercut portion in the receiving space. The advantage of the valve seat extending in this way is that the valve closing body or a sealing diaphragm located on the valve closing body abuts against the valve seat, thereby improving the closing characteristics of the fluid valve. Furthermore, the undercut portion ensures a sufficiently large fluid passage cross-section between the corresponding connections of the fluid valve.

[0011] According to one embodiment, the undercut is disposed on a lower region of the accommodating space opposite to the opening of the accommodating space. This significantly improves the circulation around the free end of the valve closing body because the cross-sectional area of ​​the fluid passage is increased due to the undercut.

[0012] According to one embodiment, the first and / or second valve seats have an annular protrusion that forms a flat abutment surface against a sealing diaphragm that partially surrounds the valve closing body. An annular sealing edge is provided on the protrusion, extending axially into the receiving space. In other words, the sealing edge extends toward the valve closing body or the sealing diaphragm located on the valve closing body from the flat abutment surface. The annular protrusion constitutes a surface support for the sealing diaphragm and further constitutes a stop that restricts the pivotability of the valve closing body. When the sealing diaphragm abuts against the annular protrusion, the sealing edge extending from the annular protrusion presses into the sealing diaphragm, thereby providing a high sealing performance for the fluid valve.

[0013] According to one embodiment, the sealing edge is disposed on the radial inner edge of the annular protrusion. This places the sealing edge directly at the valve opening. This is advantageous because it minimizes the area over which the fluid exerts pressure on the valve closing body, thereby maximizing the fluid pressure conditions that allow control of the valve's on / off state via the actuation unit.

[0014] According to one embodiment, the edge of the opening of the accommodating space forms a radial sealing surface adapted for the foot region of a sealing diaphragm to abut against, the sealing diaphragm serving to isolate the opening from the outside. Preferably, the sealing diaphragm is an integral sealing diaphragm that also surrounds the valve closing body on its free end side. Preferably, the edge of the opening of the accommodating space forms an external radial sealing surface, and the foot region of the sealing diaphragm abuts against this radial sealing surface on its outer peripheral side. On the inner peripheral side, a protrusion of the actuation unit of the fluid valve allows the sealing diaphragm to be pressed against this external radial sealing surface. The protrusion of the actuation unit may in particular be a protrusion located on a valve housing carrier for coupling the valve housing and the actuation unit. This achieves reliable isolation between the valve housing and the actuation unit.

[0015] According to one embodiment, the opening has a non-rotationally symmetrical peripheral shape. Due to this non-rotational symmetry, the drive unit needs to be installed in a predetermined orientation relative to the valve housing, and the sealing diaphragm can only be embedded into the valve housing in a limited rotational position, thus limiting its orientation relative to the at least one valve seat. This reduces installation errors that could degrade the sealing quality of the fluid valve.

[0016] According to one embodiment, the valve housing has a coupling portion for detachably securing the valve housing to a drive unit, the drive unit for moving the valve closing body. This simplifies the installation of the fluid valve. The coupling portion is preferably configured such that the valve housing can only be positioned on the drive unit in a predetermined location or orientation.

[0017] According to one embodiment, the coupling portion is adapted to be snap-fitted onto the drive unit. This allows the valve housing to be easily installed onto the drive unit without tools.

[0018] According to one embodiment, the valve housing has at least one receiving portion for a quick-connect hose device. This receiving portion allows the quick-connect hose device to be screwed in or pressed in, for example. The quick-connect hose device is particularly adapted to receive the free end of a fluid hose therein and to lock the hose in place by a securing device (e.g., barbs that engage with the hose wall) to prevent accidental disengagement. This enables rapid coupling of the hose to the fluid valve.

[0019] According to another aspect, a fluid valve is disclosed. The fluid valve includes a valve housing and a magnetic drive unit for a valve closing body movable within the valve housing. The valve housing is constructed according to any of the above embodiments.

[0020] According to one aspect, a method for manufacturing a valve housing for a fluid valve is disclosed. The fluid valve has at least one fluid passage for fluid flow and a accommodating space for a valve closing body movable within the valve housing. The manufacturing method includes the following steps: - Provide injection molding molds; - Provides at least first and second core portions adapted to form at least one fluid passage in the valve housing; - Provides a retractable core for forming the accommodating space, wherein the retractable core has at least one recess for fabricating at least one valve seat in the accommodating space; - The first and second cores and the shrinkable core are fed into the injection molding die, wherein at least the first core and the shrinkable core work together such that the free end of the first core is aligned with the recess of the shrinkable core; - Feeding the flowable injection molding material into the injection molding die; and - Separate the first and second cores and the shrink-fit core from the injection molding die; The valve housing produced by the injection molding operation has at least one valve seat that extends into the receiving space, thereby forming at least one undercut portion in the receiving space through the valve seat.

[0021] The technical advantage of the manufacturing method lies in the fact that the valve housing, constructed as an injection-molded part, achieves extremely precise functioning of the fluid valve because the valve housing, including the at least one valve seat, can be manufactured in a very precise manner, thereby achieving high repeatability of the fluid valve without the need for subsequent calibration or adjustment. By using a shrink-fit core, the at least one valve seat can be integrally manufactured with the valve housing, despite the presence of an undercut.

[0022] According to one embodiment of the method, at least one valve seat comprising an annular protrusion is formed by the contractile core, the protrusion forming a flat abutment surface against a sealing diaphragm that partially surrounds the valve closing body. An annular sealing edge is formed on the protrusion by the contractile core, extending axially into the accommodating space. The annular protrusion constitutes a surface support for the sealing diaphragm and further constitutes a stop that restricts the pivotability of the valve closing body. When the sealing diaphragm abuts against the annular protrusion, the sealing edge extending from the annular protrusion can press into the sealing diaphragm, thereby providing high sealing performance of the fluid valve.

[0023] According to one embodiment, the accommodating space is formed by the retractable core, creating an opening on the valve housing with a non-rotationally symmetrical peripheral shape on the outer side. Due to this non-rotational symmetry, the drive unit needs to be installed in a predetermined orientation relative to the valve housing, and the sealing diaphragm can only be embedded in the valve housing at a limited rotational position, thus limiting its orientation relative to the at least one valve seat. This reduces installation errors that could degrade the sealing quality of the fluid valve.

[0024] Within the scope of this invention, the terms "nearly", "generally" or "about" indicate a deviation of + / - 10%, preferably + / - 5%, from a relatively precise value, or a deviation in the form of a change that is insignificant to the function.

[0025] Further embodiments, advantages, and uses of the present invention are also described below in conjunction with the accompanying drawings. All features described and / or illustrated, whether individually or in any combination thereof, are, in principle, the subject matter of the invention, regardless of their combination in the claims or their retrospective reference. The content of the claims is also an integral part of this description. Attached Figure Description

[0026] The present invention will now be described in detail with reference to several accompanying drawings and embodiments. Wherein: Figure 1 This is an illustrative longitudinal sectional view of a fluid valve; Figure 2 This is an illustrative perspective view of the valve housing; Figure 3 To pass through the center Figure 2 An illustrative longitudinal sectional view of the valve housing shown; Figure 4 In order to be in Figure 3 An illustrative detail of the area marked with Z in the diagram, used to show the valve seat; and Figure 5 The flowchart illustrates the steps involved in manufacturing a valve body using an injection molding process. Detailed Implementation

[0027] Figure 1 This is an illustrative and schematic longitudinal sectional view of a fluid valve 1, which includes a valve housing 10, centered throughout.

[0028] The fluid valve 1 includes an actuation unit 3 for a valve closing body 2 and a valve housing 10 having at least one fluid passage 11. The valve closing body 2 extends into the valve housing 10 and is coupled to the actuation unit 3, thereby enabling the valve closing body 2 to move, particularly pivot, via the actuation unit 3. The valve closing body 2 is particularly capable of entering first and second pivot positions, thereby releasing or closing the valve opening 10.1 depending on the pivot position. In the illustrated embodiment, the valve housing 10 has three connectors 10a, 10b, and 10c, wherein a pair of connectors 10a, 10b, and 10c are fluidly connected to each other depending on the pivot position of the valve closing body 2. However, the fluid valve 1 may also have only two connectors 10a, 10b, and 10c, wherein the fluid connection between these two connectors is released or not released depending on the pivot position of the valve closing body 2. The valve housing 10 may have a receiving portion 17 for a quick-connect hose on each of the connectors 10a, 10b, and 10c. The quick-connect hose device can be configured such that the free end of the hose can be inserted into the device, thereby forming a fluid-tight connection between the hose cavity and the fluid passage 11 constructed in the valve housing 10. Furthermore, the quick-connect hose device may have a locking member to prevent the hose from accidentally detaching from the device.

[0029] The fluid valve 1 has the following function: the drive unit 3 is adapted to influence the pivoting position of the armature 5. The drive unit 3 is, for example, an electromagnetic drive unit, that is, it generates magnetic force when the coil 4 of the drive unit 3 is energized, thereby causing the armature 5 to move from a second pivoting position to a first pivoting position. Figure 1 The first pivot position is shown in the diagram. This first pivot position is maintained as long as coil 4 is energized. Armature 5 is preferably spring-loaded so that after the energization of coil 4 is stopped, the armature moves back to the second pivot position.

[0030] like Figure 1 As shown, the valve closing body 2 is coupled to the armature 5, such that the valve closing body 2 moves, in particular, pivots, via the armature 5. The valve closing body 2, in particular, enters a first or second position in the valve housing 10 according to the pivoting position of the armature 5, thereby defining the valve position or opening or closing at least one fluid passage 11.

[0031] The drive unit 2 includes, for example, a base 6. The base 6 constitutes the basic load-bearing structure of the drive unit 3. The base is preferably constructed as an injection-molded part, particularly as a plastic injection-molded part. The base 6 has a tubular or generally tubular receiving portion for the coil 4. A first insertion port is constructed within the receiving portion, which allows a branch of the U-shaped core 7 to be inserted.

[0032] The base 6 also includes an armature housing 6.1. This armature housing 6.1 is directly adjacent to the housing of the coil 4 and is adapted to support the armature 5 in a pivotable manner. The armature housing 6.1 is shell-shaped, particularly rectangular, and has a bottom region and multiple wall regions. The wall regions are connected to the bottom region, surrounding it circumferentially, and extend from the bottom region on the side opposite to the coil 4.

[0033] A second socket is provided in the bottom region for the insertion of a second branch of the U-shaped core 7. Thus, the U-shaped core 7 is yoke-shaped, wherein one branch of the core 7 is surrounded by a coil 4, such that when the coil 4 is energized, a closed magnetic circuit is formed through the core 7 and the armature 5 spanning the pole faces 7.1, 7.1' of the core 7.

[0034] On the armature housing 6.1, a valve housing carrier 8 is provided on the side opposite to the core 7 or coil 4. The valve housing carrier 8 is adapted to establish a connection between the drive unit 3 and the valve housing 10. The valve housing carrier 8 is connected to the wall of the armature housing 6.1, for example, and in particular, closes the shell-shaped armature housing 6.1 (except for the through hole for the valve closing body 2).

[0035] The valve housing carrier 8 has a fixing member for detachably securing the valve housing 10 to the drive unit 3. Specifically, as... Figure 2 As shown, the valve housing 10 has, for example, a plurality of tongue-shaped coupling portions 16, which work together with the snap-fit ​​flange on the valve housing carrier 8 and are used to establish a snap-fit ​​connection with the valve housing carrier 8. In principle, it can also be fixed in the opposite way, that is, the coupling portions 16 are provided on the valve housing carrier 8, and these coupling portions work together with the snap-fit ​​flange of the valve housing 10.

[0036] Figure 3 To pass through the center Figure 2 The diagram shows a cross-sectional view of the valve housing 10, and is a longitudinal cross-sectional view through the fluid passage 11 constructed in the valve housing 10.

[0037] A pair of connectors 10a and 10b are provided facing each other in the valve housing 10, and another connector 10c is provided below, opposite to the opening 12.1 of the accommodating space 12. In this embodiment, depending on the position of the valve closing body, a fluid connection may be established between connectors 10a and 10c, or between connectors 10b and 10c. The fluid valve 1 constitutes a fluid adapter, wherein connector 10c, acting as an inlet, is coupled either to connector 10a, acting as an outlet, or to connector 10b, acting as an outlet, or to connector 10a, acting as an inlet, or to connector 10b, acting as an inlet.

[0038] In an alternative embodiment, connector 10b may be omitted, allowing the fluid passage between connectors 10a and 10c to be opened or closed via fluid valve 1 (depending on its on / off state).

[0039] In the illustrated embodiment, the valve closing body 2 has two branches 2.1 and 2.2. The first branch 2.1 extends into the receiving space 12. The second branch 2.2 is preferably inclined at an angle relative to the first branch, particularly perpendicular or substantially perpendicular, and connects the valve closing body 2 to the armature 5.

[0040] The first branch 2.1 is partially, and particularly in the region of its free end, surrounded by a sealing diaphragm 15. The sealing diaphragm 15 serves, on the one hand, as a sealing element for sealing the valve opening 10.1, and on the other hand, as an isolation element for the opening 12.1 of the accommodating space 12 from the drive unit 3. Figure 1 As shown, the sealing diaphragm 15 is cap-shaped. The sealing diaphragm can, in particular, circumferentially close the lower region of the accommodating space 12 and match the shape of the free end of the first branch 2.1 of the valve closing body 2, such that the free end of the first branch 2.1 is precisely accommodated in the sealing diaphragm 15.

[0041] At least one valve seat 13, 14 is provided in the accommodating space 12. The valve seats 13, 14 are preferably provided on the sidewalls of the accommodating space 12 that extend parallel to or substantially parallel to the longitudinal axis LA of the accommodating space 12. In the illustrated embodiment, a pair of valve seats 13, 14 are provided on the opposite sidewalls of the accommodating space 12, such that the first valve seat 13 and the second valve seat 14 are directly opposite each other at the same height.

[0042] The valve housing 10 is integrally constructed as an injection-molded part, particularly as a plastic injection-molded part. At least one valve seat 13, 14 extends into the receiving space 12, such that the valve seats 13, 14 form undercut portions 13.1, 14.1. The undercut portions 13.1, 14.1 are located within the lower region 12.2 of the receiving space 12, and are positioned below the valve seats 13, 14 opposite to the opening 12.1.

[0043] Figure 4 The structure of the second valve seat 14 is shown in more detail. It should be noted that the first valve seat 13 preferably adopts the same construction scheme as the second valve seat 14. The valve seat 14 has an annular, particularly circular, protrusion 14.2 that extends from the side wall into the accommodating space 12. A valve opening 10.1 is provided inside the circular protrusion 14.2, which is fluid-tightly closed when a valve closing body 2 with a sealing diaphragm 15 is fitted thereto.

[0044] The protrusion 14.2 forms a planar abutment against the sealing diaphragm 15 or the valve closing body 2, such that the valve closing body 2 is restricted by the protrusion 14.2 in its pivoting path.

[0045] Preferably, the armature 5 is held in the armature housing 6.1 without a stop, meaning that the pivoting movement of the armature 5 is not restricted by the armature portion abutting against the component surrounding the armature 5, whether in the first pivoting position or the second pivoting position. Instead, the pivoting movement of the armature 5 is restricted by the valve closing body 2, which abuts against the valve seats 13, 14 depending on the pivoting position of the armature 5, or against a stop portion in the valve housing 10 opposite to the valve seat if only one valve seat is provided. It should be noted that even in the second pivoting position entered when the coil 4 is energized, the armature 5 is spaced a certain distance from the pole faces 7.1, 7.1'. This distance is preferably less than 1 mm, particularly less than 0.5 mm, in order to introduce the highest possible force into the armature 5.

[0046] A sealing edge is preferably provided on the protrusion 14.2, which is adapted to press the sealing diaphragm 15 into place when it abuts against the protrusion 14.2. This achieves a high degree of sealing of the valve opening 10.1 closed by the valve closing body 2.

[0047] Especially as Figure 2 As shown, the opening 12.1 for the valve closing body 2 to extend into the accommodating space 12 has an inner abutment surface for the sealing diaphragm 15. The sealing diaphragm 15 has a foot region 15.1, which corresponds to the peripheral shape of the opening 12.1 on its outer periphery. Furthermore, the valve housing carrier 8 has a protrusion 8.1 that abuts against the inner wall of the foot region 15.1 of the sealing diaphragm 15 with its outer side. The protrusion 8.1 matches the shape of the foot region 15.1 and the opening 12.1, such that the sealing diaphragm 15 is radially pressed against the edge 12.1.1 of the opening in the foot region 15.1, thereby sealing the accommodating space 12 at the transition between the valve housing 10 and the valve housing carrier 8.

[0048] Preferably, the opening 12.1 has a non-rotationally symmetrical peripheral shape on the inside. This ensures that the sealing diaphragm 15 can only be inserted into the receiving space 12 in a defined insertion position or with a defined rotational orientation, thereby ensuring that the sealing diaphragm 15 is planarly pressed onto at least one valve seat 13, 14 by means of the valve closing body 2.

[0049] The following details how to manufacture the valve body 10 using injection molding.

[0050] As previously described, at least one valve seat 13, 14 or the stop (in the case where there is only one valve seat and the pivoting movement of the valve closing body 2 is restricted by the stop on the side opposite to the valve seat) extends into the receiving space 12, thereby creating undercut portions 13.1, 14.1. The at least one valve seat 13, 14 or the stop is integrally provided on the injection-molded part, i.e., manufactured simultaneously with the rest of the valve housing 10. Therefore, the undercut portions 13.1, 14.1 are also formed by injection molding.

[0051] A core is used to manufacture connectors 10a, 10b, 10c and receiving space 12. The core is fed into an injection molding die to form a corresponding portion of the at least one fluid channel 11 and the receiving space 12. The core used to form the receiving space 12 is constructed as a shrinkable core. Herein, "shrinkable" means that after the injection molding operation is performed and the molding material has solidified, the shape of the core initially changes and shrinks on the outer periphery, so that the core can be pulled out of the receiving space 12 despite the presence of undercut portions 13.1, 14.1.

[0052] The shrinkable core has a recess on each of its opposite sides for forming the at least one valve seat 13, 14 or the stop portion. The recess for forming the at least one valve seat 13, 14 has, for example, a shape opposite to the aforementioned shape of the valve seats 13, 14. The recess is particularly adapted to form a protrusion 14.2 and a sealing edge 14.3 extending from the protrusion.

[0053] Furthermore, the retractable core is also adapted to form a non-rotationally symmetrical peripheral shape of the opening 12.1 of the accommodating space 12.

[0054] The steps of manufacturing the valve body 10 are described in detail below: First, an injection molding die (S10) is provided, and first and second cores (S11) are provided, which are adapted to form at least one fluid channel in the valve housing.

[0055] In addition, a retractable core (S12) is provided for forming a receiving space. The retractable core has at least one recess for fabricating at least one valve seat in the receiving space.

[0056] The first and second cores and the shrinkable core are then fed into an injection molding die. The first and / or second cores work together with the shrinkable core to align the free end of the first core with the recess of the shrinkable core (S13).

[0057] The flowable injection molding material is then fed into the injection molding mold (S14).

[0058] After the injection molding material has cured, the first and second cores and the shrinkage core are removed from the injection molding mold as their size decreases (S15).

[0059] The present invention has been described above with reference to embodiments. Of course, various changes and modifications can be made without departing from the scope of protection defined by the claims.

[0060] Appendix Label Table 1. Fluid valve 2 Valve closing body 2.1 First Branch 2.2 Second Branch 3 drive units 4 coils 5 Armature 6. Matrix 6.1 Armature housing 7 Core 7.1, 7.1' Polar surfaces 8 Valve housing carrier 8.1 Protrusion 10 Valve housing 10a, 10b, 10c connectors 10.1 Valve opening 11 Fluid Channels 12 Storage space 12.1 Opening 12.1.1 Edge 12.2 Lower Region 13 First valve seat 13.1 Undercut 14 Second valve seat 14.1 Undercut 14.2 Annular protrusion 14.3 Sealing edge 15. Sealing diaphragm 15.1 Foot Area 16. Coupling Part 17. Reception Section The vertical axis of the LA accommodating space

Claims

1. A valve housing for a fluid valve (1), comprising at least one fluid passage (11) for fluid flow, wherein, The valve housing (10) has a receiving space (12) for a valve closing body (2) movable within the valve housing (10), the receiving space (12) having an opening (12.1) through which the valve closing body (2) is fed into the receiving space (12) of the valve housing (10), and at least one first valve seat (13) is constructed in the receiving space (12) and extends into the receiving space (12), thereby forming at least one bottom in the receiving space (12) through the first valve seat (13). The valve body (10) is an integrally constructed injection molded part (13.1), and the valve seat (10) is integrally manufactured with the valve body (10) by injection molding process; the first valve seat (13) has an annular protrusion that forms a flat abutment surface against the sealing diaphragm (15) that partially surrounds the valve closing body (2), the annular protrusion also serves to restrict the pivoting of the valve closing body, and an annular sealing edge is provided on the protrusion that extends axially into the receiving space (12).

2. The valve housing according to claim 1, characterized in that, The accommodating space (12) includes a second valve seat (14) or a stop, wherein the first valve seat (13) is either directly opposite the second valve seat (14) or directly opposite the stop for limiting the pivoting of the valve closing body (2), wherein the second valve seat (14) has an annular protrusion that forms a flat abutment surface against a sealing diaphragm (15) that partially surrounds the valve closing body (2), the annular protrusion also serves to limit the pivoting of the valve closing body, and an annular sealing edge is provided on the protrusion that extends axially into the accommodating space (12).

3. The valve housing according to claim 2, characterized in that, The second valve seat (14) or the stop portion for the valve closing body extends into the receiving space (12), thereby forming at least one undercut portion (14.1) in the receiving space (12) by means of the second valve seat (14) or the stop portion.

4. The valve housing according to claim 3, characterized in that, The undercut portion is located in the lower region (12.2) of the accommodating space (12) opposite to the opening (12.1).

5. The valve housing according to claim 1, characterized in that, The sealing edge is located on the radial inner edge of the annular protrusion.

6. The valve housing according to claim 1, characterized in that, The edge (12.1.1) of the opening (12.1) of the accommodating space (12) forms a radial sealing surface, which is adapted to be abutted by the foot region (15.1) of the sealing diaphragm (15), which is used to isolate the opening (12.1) from the outside.

7. The valve housing according to claim 1, characterized in that, The opening (12.1) has a non-rotationally symmetric peripheral shape.

8. The valve housing according to claim 1, characterized in that, The valve housing (10) has a coupling portion (16) for detachably fixing the valve housing (10) to the drive unit (3), which is used to move the valve closing body (2).

9. The valve housing according to claim 8, characterized in that, The coupling portion (16) is adapted to be snapped onto the drive unit (3).

10. The valve housing according to claim 1, characterized in that, The valve housing (10) has at least one receiving portion (17) for a quick-connect hose device.

11. A fluid valve, comprising a valve housing (10) and a drive unit (3) for a valve closing body (2) movable within the valve housing (10), characterized in that, The valve housing (10) is constructed according to any one of the preceding claims.

12. A method of manufacturing a valve housing (10) for a fluid valve (1), said valve housing having at least one fluid passage (11) for fluid flow and a accommodating space (12) for a valve closing body (2) movable within the valve housing (10), wherein, The method includes the following steps: - Provide injection molding mold (S10); - Provide at least first and second core portions adapted to form at least one fluid passage (11) in the valve housing (10) (S11). - Provide a shrinkable core for forming the accommodating space (12), wherein the shrinkable core has at least one recess for creating at least one valve seat (13, 14) in the accommodating space (12) (S12). - The first and second cores and the shrinkable core are fed into the injection molding die, wherein at least the first core and the shrinkable core work together such that the free end of the first core is aligned with the recess of the shrinkable core (S13). - Flowable injection molding material is fed into the injection molding die (S14); and - Separate the first and second cores and the shrinkable core from the injection molding die (S15). The valve housing (10) produced by the injection molding process has at least one valve seat (13, 14) that extends into the receiving space (12), thereby forming at least one undercut portion (13.1, 14.1) in the receiving space (12) through the valve seat (13, 14).

13. The method according to claim 12, characterized in that, At least one valve seat (13, 14) comprising an annular protrusion is formed by the shrinkable core, the protrusion forming a flat abutment surface against a sealing diaphragm (15) that partially surrounds the valve closing body (2), and an annular sealing edge is formed on the protrusion by the shrinkable core, which extends axially into the receiving space (12).

14. The method according to claim 12 or 13, characterized in that, The opening (12.1) of the accommodating space (12) formed by the contractile core on the outer side of the valve housing (10) has a non-rotationally symmetrical peripheral shape.

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