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EP-4741691-A1 - VALVE

EP4741691A1EP 4741691 A1EP4741691 A1EP 4741691A1EP-4741691-A1

Abstract

Valve (1) comprising a valve housing (2) with a valve chamber (3), wherein the valve chamber (3) has a chamber wall (4) into which at least one fluid channel (5) opens, wherein a valve core (6) is mounted in the valve chamber (3), wherein the valve core (6) is provided with a channel structure (7) which interacts with the fluid channel (5), wherein a seal (8) is associated with the fluid channel (5), wherein the seal (8) is arranged on the chamber wall (4), wherein the seal (8) is planar and comprises at least two layers (9, 10).

Inventors

  • Tuzin, Artem

Assignees

  • TI Automotive Technology Center GmbH

Dates

Publication Date
20260513
Application Date
20251001

Claims (15)

  1. Valve (1) comprising a valve housing (2) with a valve chamber (3), wherein the valve chamber (3) has a chamber wall (4) into which at least one fluid channel (5) opens, wherein a valve core (6) is mounted in the valve chamber (3), wherein the valve core (6) is provided with a channel structure (7) which interacts with the fluid channel (5), wherein a seal (8) is associated with the fluid channel (5), wherein the seal (8) is arranged on the chamber wall (4), wherein the seal (8) is planar and comprises at least two layers (9, 10).
  2. Valve according to claim 1, characterized in that the seal (8) is rectangular and has an opening (11) which corresponds to the fluid channel (5).
  3. Valve according to claim 2, characterized in that the seal (8) has a sealing bead (12) at least on one side at the edge limiting the opening (11).
  4. Valve according to claim 2 or 3, characterized in that the seal (8) has a sealing bead (12) on both sides at the edge limiting the opening (11).
  5. Valve according to claim 3 or 4, characterized in that the sealing bead (12) has an arc-shaped contour.
  6. Valve according to claim 3 or 4, characterized in that the sealing bead (12) forms a planar contact area (19).
  7. Valve according to one of claims 1 to 6, characterized in that the seal (8) has support ridges (13) on the circumferentially facing edges.
  8. Valve according to claim 7, characterized in that the support ridges (13) have an arc-shaped contour.
  9. Valve according to claim 7, characterized in that the support ridges (13) form a planar contact area (19').
  10. Valve according to one of claims 1 to 9, characterized in that support ribs (14) are assigned to the fluid channels (5) which extend in the axial direction and project radially inwards, wherein the seal (8) is arranged between two support ribs (14).
  11. Valve according to claim 10, characterized in that the support ridges (13) come into contact with the support ribs (14).
  12. Valve according to one of claims 1 to 11, characterized in that the valve (1) is designed as a rotary valve with a cylindrical valve chamber (3).
  13. Valve according to one of claims 1 to 12, characterized in that a first layer (9) is made of an elastomeric material and a second layer (10) is made of a material with a low coefficient of friction, wherein the second layer (10) faces the valve core (6).
  14. Valve according to claim 13, characterized in that the second layer (10) is made of PTFE.
  15. Valve according to one of claims 4 to 14, characterized in that the contours of the sealing bead (12) in the sections facing the valve core (6) and the chamber wall (4) have a plateau and are flattened.

Description

valve The invention relates to a valve comprising a valve housing with a valve chamber, wherein the valve chamber has a chamber wall into which at least one fluid channel opens, wherein a valve core is mounted in the valve chamber, wherein the valve core is provided with a channel structure which interacts with the fluid channel, and wherein a seal is associated with the fluid channel. Such a valve is made from the WO 2017/095994 A1 The valve described there is a rotary valve used in cooling circuits to control the coolant flow. Coolant can flow in and out of the valve through the fluid ports opening into the valve housing. The channel structure integrated into the valve core controls the coolant flow, and depending on the design and number of fluid channels, different cooling circuits can be controlled, the coolant flow rate regulated, and/or the flow direction of the coolant adjusted. In a rotary valve, the coolant flow is adjusted by rotating the valve core, and the corresponding actuator for rotating the valve core is simple in design and easy to control. Consequently, rotary valves and their associated actuators are inexpensive to manufacture and require little installation space. Rotary valves are therefore particularly advantageous for use in temperature control circuits in the field of electromobility. Components of electric vehicles requiring temperature control include, in particular, electrical energy storage devices, power electronics, and also connectors for fast charging equipment. The fluid flowing through the temperature control circuit... Depending on the requirements, the temperature control medium can be heated in a heating unit or cooled in a cooling unit. The temperature control medium is achieved via one or more rotary valves. To prevent internal leakage, a sealing element is arranged in the transition area between the fluid channel and the valve core. The problem here is that, depending on its design, the sealing element can generate high frictional forces, which negatively impacts wear and the required actuating force of the actuator. On the other hand, internal leakage between the valve housing and the valve core should be avoided as much as possible. The invention is based on the objective of providing a valve that is inexpensive to manufacture and has a long service life. This problem is solved by the features of claim 1. Advantageous embodiments are described in the dependent claims. The valve according to the invention comprises a valve housing with a valve chamber, wherein the valve chamber has a chamber wall into which at least one fluid channel opens, wherein a valve core is mounted in the valve chamber, wherein the valve core is provided with a channel structure which interacts with the fluid channel, wherein a seal is associated with the fluid channel, wherein the seal is arranged on the chamber wall, wherein the seal is planar and comprises at least two layers. The seal according to the invention is particularly easy and cost-effective to manufacture due to its flat design, and positioning the seal during assembly is also particularly simple. The two-layer design of the seal makes it possible to provide a first layer that is optimized for friction and a second layer that exhibits particularly advantageous resilient properties. This design enables a high sealing effect at low Frictional force. This reduces the torque required to move the valve core and makes the use of more cost-effective actuators possible. The seal can be rectangular and have an opening that corresponds to the fluid channel. In this design, the seal is a flat gasket and is particularly easy to position on the chamber wall of the valve chamber. The seal can have a sealing bead on at least one side of the edge defining the opening. The sealing bead is preferably formed on the side facing the valve core. According to a further embodiment, the sealing bead is formed on both sides and extends towards the valve housing and the valve core. The sealing bead provides material reinforcement, which has a beneficial effect on the mechanical stability of the seal. Furthermore, the sealing bead enables defined contact with the valve core and thus a particularly precise sealing effect at low frictional forces. In a further advantageous embodiment, sealing beads are arranged on both sides of the edge defining the opening. One sealing bead extends towards the chamber wall and the other towards the valve core. This improves the sealing effect of the arrangement. The sealing bead can have an arc-shaped contour. This arc shape results in a gradual increase in the thickness of the sealing bead and, consequently, a wider contact area between the seal and the body being sealed, such as the valve core. In contrast, a seal designed as a sealing lip or rib often has a linear contact surface, which, however, is associated with very high contact pressure that promotes wear. With an arc-shaped sealing bead, on the other hand, a wid