CHECK VALVE

Abstract

A check valve, comprising a first housing part, a second housing part and an insert, wherein a spring element and a valve body are formed from the insert, wherein a valve seat is formed from the first housing part, wherein the first housing part and the second housing part have a connecting element for connection to a fluid line, wherein the insert is formed from injection-moldable plastic, and a coolant circuit comprising a coolant guide and at least one check valve, and an electric vehicle comprising a coolant circuit.

Claims

1. A check valve, comprising: a first housing part; a second housing part; and an insert formed from injection-moldable plastic, wherein a spring element and a valve body are formed from the insert, wherein a valve seat is formed from the first housing part, and wherein the first housing part and the second housing part have a connecting element for connection to a fluid line.

2. The check valve according to claim 1, wherein a retaining body is formed from the insert, which is supported on the second housing part.

3. The check valve according to claim 2, wherein the insert with spring element, valve body and retaining body is formed in one piece and in a materially integral manner.

4. The check valve according to claim 1, wherein the first housing part and/or the second housing part are formed from injection-moldable plastic.

5. The check valve according to claim 1, wherein the housing parts are connected to one another in a form-fitting or force-fitting manner and/or with a substance-to-substance bond.

6. The check valve according to claim 1, wherein a guide element is formed from the insert.

7. The check valve according to claim 6, wherein the guide element is supported in sections on the inner housing wall of the first housing part.

8. The check valve according to claim 6, wherein the guide element is formed in one piece and in a materially integral manner from the insert.

9. The check valve according to claim 1, wherein the spring element comprises at least one spiral spring.

10. The check valve according to claim 1, wherein the connecting elements are formed as pipe sockets.

11. The check valve according to claim 1, wherein the connecting elements are formed as quick connectors.

12. The check valve according to claim 1, wherein pipes are connected to the connecting elements in a substance-to-substance bond.

13. A coolant circuit comprising a coolant guide and at least one check valve according to claim 1.

14. An electric vehicle comprising a coolant circuit according to claim 13.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0018] An exemplary embodiment of the check valve according to the disclosure is explained in more detail below with reference to the Figure. It shows schematically:

[0019] FIG. 1 a check valve in partial section.

DETAILED DESCRIPTION

[0020] FIG. 1 shows a check valve 1 comprising a first housing part 2, a second housing part 3 and an insert 4. A spring element 5 and a valve body 6 are formed from the insert 4, and a valve seat 7 is formed from the first housing part 2. The first housing part 2 and the second housing part 3 have connecting elements 8 in the form of pipe sockets for connection to fluid lines, for example pipes or hoses.

[0021] A retaining body 9 is formed from the insert 4, which is supported on the second housing part 3. Furthermore, a guide element 10 is formed from the insert 4, wherein the guide element 10 is supported in sections on the inner housing wall of the first housing part 2.

[0022] The valve body 6 is disc-shaped and has a conically shaped peripheral edge, wherein the peripheral edge rests in a sealing manner on the valve seat 7, which is shaped congruently with the valve body 6. The spring element 5 is designed as a spiral spring and is attached centrally to the valve body 6. In the present embodiment, the spiral spring is formed as a single spiral spring. In alternative embodiments, the spiral spring can also be a multiple spiral spring, for example a double or triple spiral spring. The guide element 10 is in turn arranged on the side of the valve body 6 facing away from the spring element 5.

[0023] The guide element 10 is supported in sections on the inner housing wall of the first housing part 2. The guide element 10 has bridges 11 that are arranged in a cross-shaped manner relative to one another, which are attached at the end face to the side of the valve body 6 facing away from the spring element 5. The bridges 11 can thereby come into contact with the radial outer edges on the inner housing wall of the first housing part 2 and thereby support the valve body 6.

[0024] The insert 4 with spring element 5, valve body 6, retaining body 9 and guide element 10 is made in one piece in a materially integral manner from injection-moldable plastic. In the present embodiment, the insert 4 is made of POM. Furthermore, the first housing part 2 and the second housing part 3 are made of injection-moldable plastic and are also made of POM.

[0025] The check valve 1 shown in the Figure is part of a coolant circuit of a cooling system of an electric vehicle. The cooling system is used to control the temperature of key components of the electric vehicle such as batteries, electric motors, power electronics, charging adapters and plug connections.

[0026] In an alternative embodiment, the check valve 1 shown in the FIGURE is part of an air conditioning circuit of an air conditioning system. In this context, the air conditioning system is preferably used to provide air conditioning for a vehicle.

[0027] If the same pressure prevails on both sides of the valve body 6, the valve body 6 is in sealing contact with the valve seat 7. In doing so, the valve body 6 is pressed against the valve seat 7 by the force of the spring element 5. Fluid flowing over the spring element 5 in the direction of the valve body 6 is blocked by the valve body 6. A fluid flowing from the direction of the guide element 10 toward the valve body 6, on the other hand, can lift the valve body 6 from the valve seat 7 if the force exerted on the valve body 6 by the pressure of the fluid is greater than the force of the spring element 5. In this case, the valve body 6 lifts off the valve seat 7, wherein the valve body 6 is evenly spaced apart from the valve seat 7 due to the guide element 10 and exposes an annular gap. The annular gap allows the fluid to pass through the valve body 6 and flow through the check valve 1. The fact that the guide element 10 is bridge-shaped means that the fluid flow in this area is only slightly impaired.