Changeover valve

Abstract

A changeover valve () including a valve housing (), which has at least one inlet opening () and at least three outlet openings (), of which outlet openings (), by a changeover shaft () displaceably guided in the valve housing (), one outlet opening can optionally respectively be assigned to the at least one inlet opening (), two sealing elements (), which () are displaceably guided on the changeover shaft () between two drivers () and are kept at a distance from each other with the aid of at least one pressure element (), a switching tube (), which is displaceably guided in the valve housing () via two circumferential annular guide surfaces () provided on the tube circumference thereof, and at least one switching tube opening () provided between the annular guide surfaces (). An axial actuating movement of the changeover shaft () can be transferred at least to one of the two sealing elements () in such a way that either both sealing elements () bear with outer circumferential sealing surfaces () on the sealing surfaces () of the valve housing () that surround a fluid passage () and one of the sealing elements () closes the adjacent circumferential front edge of the switching tube () with an inner circumferential sealing surface () while the other sealing element () remains at a distance from the other circumferential front edge of the switching tube (), serving as a fluid passage, or both inner circumferential sealing surfaces () of the sealing elements () bear on the adjacent circumferential front edges of the switching tube () while the one sealing element () uses the outer circumferential sealing surface () thereof to load the adjacent mating sealing surface () surrounding the fluid passage, and the other sealing element () is spaced apart from the mating sealing surface () assigned thereto and surrounding a fluid passage ().