Non-Return Valve for a Solenoid Valve and Associated Solenoid Valve

Abstract

A non-return valve for a solenoid valve includes a movable closure element and a valve structural element with a valve seat that is arranged on a through-opening to perform a direction-orientated throughflow and sealing function. The valve seat has a first region and a second region. The first region of the valve seat forms a support region for a sealing element in order to absorb a supporting force with respect to the closure element. The second region of the valve seat forms a sealing region in order to enable sealing with respect to the closure element. A solenoid valve in one embodiment includes the non-return valve.

Claims

1. A non-return valve for a solenoid valve, comprising: a movable closure element; and a valve structural element having a valve seat arranged on a through-opening in order to perform a direction-orientated throughflow and sealing function, wherein the valve seat has (i) a first region that forms a support region for the closure element in order to absorb a supporting force with respect to the closure element and (ii) a second region that forms a sealing region in order to enable sealing with respect to the closure element.

2. The non-return valve according to claim 1, wherein the first region and the second region of the valve seat interact with the closure element in a closed state of the non-return valve.

3. The non-return valve according to claim 1, wherein the valve seat is configured as a hollow cone, and wherein the first region and the second region of the valve seat are formed inside the hollow cone.

4. The non-return valve according to claim 3, wherein the first region is formed with respect to the second region spatially further in the direction of the tapering of the hollow-cone-shaped valve seat.

5. The non-return valve according to claim 1, wherein the first region of the valve seat is configured integrally with the valve structural element.

6. The non-return valve according to claim 1, wherein the second region of the valve seat is configured integrally with the valve structural element.

7. The non-return valve according to claim 1, wherein the first region and the second region of the valve seat are configured as part of the valve structural element via an injection-molding method.

8. The non-return valve according to claim 1, wherein the second region of the valve seat is configured as a sealing lip against which the closure element abuts in a sealing manner to perform a sealing function.

9. The non-return valve according to claim 8, wherein, in order to form the sealing lip, an undercut is introduced into the second region of the valve seat and predetermines a wall thickness which acts as a sealing lip with respect to the through-opening.

10. The non-return valve according to claim 1, wherein the closure element does not comprise any resilient sealing element.

11. The non-return valve according to claim 1, wherein the closure element, in order to perform the sealing function, is supported with a third region on the first region of the valve seat and seals with a fourth region on the second region of the valve seat.

12. A solenoid valve, comprising: a magnet sub-assembly; a valve cartridge that includes: a capsule, an armature that is movably guided inside the capsule, a valve insert, a tappet which is movably guided inside the valve insert and which has a closure element having a main sealing element, and a valve member having a main valve seat, wherein between a fluid inlet and a fluid outlet there is arranged a main valve which comprises the main sealing element which is connected to the closure element and the main valve seat which is arranged in the valve member, wherein a magnetic force which is produced by the magnet sub-assembly moves the armature and the tappet, and wherein the main sealing element, in order to perform a sealing function, is introduced in a sealing manner into the main valve seat; and a non-return valve arranged in a bypass with respect to the main valve and configured to perform a direction-orientated throughflow and sealing function, the non-return valve including: a movable closure element, and a valve structural element having a valve seat arranged on a through-opening in order to perform the direction-orientated throughflow and sealing function, the valve seat having (i) a first region that forms a support region for the closure element in order to absorb a supporting force with respect to the closure element and (ii) a second region that forms a sealing region in order to enable sealing with respect to the closure element.

13. The non-return valve according to claim 8, wherein the sealing lip is a resilient peripheral sealing lip against which the closure element abuts in the sealing manner to perform the sealing function.

14. The non-return valve according to claim 10, wherein the closure element is configured as a sealing ball.

15. The non-return valve according to claim 11, wherein the closure element, in order to perform the throughflow function, abuts an abutment and releases the valve seat, the abutment arranged opposite the valve seat.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0035] It should be noted that the features set out individually in the description can be combined with each other in any technically advantageous manner, and set out other embodiments of the disclosure. Other features and advantages of the disclosure will be appreciated from the description of embodiments with reference to the appended drawings.

[0036] In the drawings:

[0037] FIG. 1 is a schematic sectioned view of a solenoid valve having a non-return valve, and

[0038] FIG. 2 is a detailed illustration of the non-return valve according to the prior art (left half of the image) and an embodiment of the disclosure (right half of the image).

DETAILED DESCRIPTION

[0039] In FIG. 2, in the right half of the image a detailed illustration of the non-return valve according to an embodiment of the disclosure is shown. The valve seat 14.4 is configured substantially in the form of a hollow cone. This hollow-cone-shaped region comprises a first region 14.1 and a second region 14.2.

[0040] The first region 14.1 of the valve seat 14.4 forms a support region, on which the closure member 15 is supported with a first region 15.1. The second region 14.2 of the valve seat 14.4 forms a sealing region, on which the closure member 15 is sealed with a second region 15.2.

[0041] The first region 14.1 is located spatially further in the direction of the tapering of the hollow-cone-shaped valve seat 14.4in comparison with the second region 14.2. The first region 14.1 forms a peripheral support face. At this location, supporting forces with respect to the closure member 15 can be absorbed by the valve seat 14.4 and introduced into the valve component 14. A plastic deformation of the valve seat in particular at high differential pressures is thereby prevented.

[0042] The second region 14.1 is located spatially further in the direction of the opening region of the hollow-cone-shaped valve seat 14.4in comparison with the first region 14.1. The second region 14.2 forms in this instance a sealing face. This sealing face is configured as a peripheral sealing lip. In order to form the sealing lip, an undercut 14.5 is introduced into the valve seat 14.4. This undercut 14.5 predetermines the wall thickness which acts as a sealing lip. The undercut 14.5 is in this instance constructed, for example, as a peripheral annular groove. The sealing lip may have been produced directly using the injection-molding method. Alternatively, the undercut 14.5 may have been produced subsequently by means of, for example, machining methods. The resilience of the sealing lip can be defined by the depth of the undercut 14.5 and/or by means of the positioning of the undercut 14.5 on the valve seat 14.4. Accordingly, the sealing lip is capable of constituting the sealing by means of resilient deformation. Furthermore, for example, a non-circular portion of the valve seat 14.4 can also be compensated for as a result of the dimension-related increased flexibility of the sealing lip.