Vacuum-tight pressure relief valve for packaging containers
A pressure relief valve ( 1 ) comprises a main body ( 2 ), at least one through opening ( 51 ), which extends through the main body ( 2 ), a diaphragm ( 6 ), which is arranged over the at least one through opening ( 51 ), and a fluid ( 8 ), which is provided on the main body ( 2 ), the fluid ( 8 ) being arranged between the diaphragm ( 6 ) and the main body ( 2 ), the main body ( 2 ) having a first sealing region ( 21 ), a second sealing region ( 22 ) radially outside the first region, and a third sealing region ( 23 ) radially outside the second region, the regions being respectively formed as continuously closed, the at least one through opening ( 51 ) being arranged between the first sealing region ( 21 ) and the second sealing region ( 22 ), and the diaphragm ( 6 ) covering the first sealing region ( 21 ), the second sealing region ( 22 ) and the third sealing region ( 23 ).
1. A pressure relief valve embodied free of springs and configured to be fastened on a packaging container, the pressure relief valve comprising:
a main body ( 2 ),
at least one through opening ( 51 ), which extends through the main body ( 2 ),
a diaphragm ( 6 ), which is arranged over the at least one through opening ( 51 ), and
a fluid ( 8 ), which is provided on the main body ( 2 ), the fluid ( 8 ) being arranged between the diaphragm ( 6 ) and the main body ( 2 ), and the fluid ( 8 ) having the effect that the diaphragm ( 6 ) is held on the main body ( 2 ) by adhesion,
the main body ( 2 ) having a first sealing region ( 21 ), a second sealing region ( 22 ) and a third sealing region ( 23 ),
the first sealing region ( 21 ), the second sealing region ( 22 ) and the third sealing region ( 23 ) being respectively formed as continuously closed,
the second sealing region ( 22 ) being arranged radially inside the third sealing region ( 23 ), the first sealing region ( 21 ) being arranged radially inside the second sealing region ( 22 ),
the at least one through opening ( 51 ) being arranged between the first sealing region ( 21 ) and the second sealing region ( 22 ), and
the diaphragm ( 6 ) covering the first sealing region ( 21 ), the second sealing region ( 22 ) and the third sealing region ( 23 ),
wherein, starting from a central axis ( 25 ) of the main body ( 2 ) and viewed along a direction perpendicular to the central axis ( 25 ), the at least one through opening ( 51 ) is arranged between a radially outer edge of the first sealing region ( 21 ) and a radially inner edge of the second sealing region ( 22 ),
wherein the third sealing region ( 23 ) is formed in the form of a cone envelope ring, and
wherein the first sealing region ( 21 ) and the second sealing region ( 22 ) respectively lie in a common sealing plane (E) perpendicular to the central axis ( 25 ) of the main body ( 2 ).
2. The pressure relief valve according to claim 1 , the first sealing region ( 21 ), the second sealing region ( 22 ) and the third sealing region ( 23 ) being respectively formed in a ring-shaped manner and concentrically in relation to one another.
3. The pressure relief valve according to claim 1 , the first sealing region ( 21 ) being in the form of a circular ring area.
4. The pressure relief valve according to claim 1 , the second sealing region ( 22 ) being in the form of a circular line.
5. The pressure relief valve according to claim 1 , wherein a distance (A) between the third sealing region ( 23 ) and the diaphragm ( 6 ) in an inactive state increases radially inward, and wherein the third sealing region ( 23 ) intersects the sealing plane (E).
6. The pressure relief valve according to claim 5 , the cone envelope ring having a cone envelope base angle (α) of between 1° and 4° with respect to the sealing plane (E).
7. The pressure relief valve according to claim 1 , a first peripheral depression ( 41 ) being formed between the first sealing region ( 21 ) and the second sealing region ( 22 ), and a second peripheral depression ( 42 ) being formed between the second sealing region ( 22 ) and the third sealing region ( 23 ).
8. The pressure relief valve according to claim 7 , the first depression ( 41 ) and the second depression ( 42 ) respectively having a depth (T), starting from the sealing plane (E).
9. The pressure relief valve according to claim 8 , a radially inner edge ( 230 ) of the third sealing region ( 23 ) being arranged at a distance (A) from the sealing plane (E), and a ratio of the distance (A) to the depth (T) being between 0.1 and 0.2.
10. The pressure relief valve according to claim 7 , a third depression ( 43 ) being formed radially inside the first sealing region ( 21 ), and the third depression ( 43 ) having a rectangular cross section.
11. The pressure relief valve according to claim 1 , the main body ( 2 ) being an injection-molded part.
12. The pressure relief valve according to claim 1 , the main body ( 2 ) also having a peripheral border region ( 3 ), which defines a receiving space (R) on the main body ( 2 ).
13. The pressure relief valve according to claim 12 , the border region ( 3 ) having an annular projection ( 31 ) protruding radially inward from the border region ( 3 ).
14. The pressure relief valve according to claim 1 , wherein the at least one through opening ( 51 ) is completely arranged outside the first sealing region ( 21 ), and wherein the second sealing region ( 22 ) surrounds the at least one through opening ( 51 ).
15. The pressure relief valve according to claim 1 , wherein the first sealing region ( 21 ), the second sealing region ( 22 ) and the third sealing region ( 23 ) are circular and are centered on the central axis of the main body ( 2 ).
16. A packaging container comprising at least one pressure relief valve ( 1 ), the pressure relief valve ( 1 ) having:
a main body ( 2 ),
at least one through opening ( 51 ), which extends through the main body ( 2 ),
a diaphragm ( 6 ), which is arranged over the at least one through opening ( 51 ), and
a fluid ( 8 ), which is provided on the main body ( 2 ), the fluid ( 8 ) being arranged between the diaphragm ( 6 ) and the main body ( 2 ),
the main body ( 2 ) having a first sealing region ( 21 ), a second sealing region ( 22 ) and a third sealing region ( 23 ),
the first sealing region ( 21 ), the second sealing region ( 22 ) and the third sealing region ( 23 ) being respectively formed as continuously closed,
the second sealing region ( 22 ) being arranged radially inside the third sealing region ( 23 ),
the first sealing region ( 21 ) being arranged radially inside the second sealing region ( 22 ),
the at least one through opening ( 51 ) being arranged between the first sealing region ( 21 ) and the second sealing region ( 22 ), and
the diaphragm ( 6 ) covering the first sealing region ( 21 ), the second sealing region ( 22 ) and the third sealing region ( 23 ),
wherein, starting from a central axis ( 25 ) of the main body ( 2 ) and viewed along a direction perpendicular to the central axis ( 25 ), the at least one through opening ( 51 ) is arranged between a radially outer edge of the first sealing region ( 21 ) and a radially inner edge of the second sealing region ( 22 ),
wherein the third sealing region ( 23 ) is formed in the form of a cone envelope ring, and
wherein the first sealing region ( 21 ) and the second sealing region ( 22 ) respectively lie in a common sealing plane (E) perpendicular to the central axis ( 25 ) of the main body ( 2 ).
17. A pressure relief valve embodied free of springs and configured to be fastened on a packaging container, the pressure relief valve comprising:
a main body ( 2 ),
at least two through openings ( 51 , 52 ), which extend through the main body ( 2 ),
a diaphragm ( 6 ), which is arranged over the at least two through openings ( 51 , 52 ), and
a fluid ( 8 ), which is provided on the main body ( 2 ), the fluid ( 8 ) being arranged between the diaphragm ( 6 ) and the main body ( 2 ), and the fluid ( 8 ) having the effect that the diaphragm ( 6 ) is held on the main body ( 2 ) by adhesion,
the main body ( 2 ) having a first sealing region ( 21 ), a second sealing region ( 22 ) and a third sealing region ( 23 ),
the first sealing region ( 21 ), the second sealing region ( 22 ) and the third sealing region ( 23 ) being respectively formed as continuously closed,
the second sealing region ( 22 ) being arranged radially inside the third sealing region ( 23 ),
the first sealing region ( 21 ) being arranged radially inside the second sealing region ( 22 ),
the at least two through openings ( 51 , 52 ) being arranged between the first sealing region ( 21 ) and the second sealing region ( 22 ), and
the diaphragm ( 6 ) covering the first sealing region ( 21 ), the second sealing region ( 22 ) and the third sealing region ( 23 ),
wherein, starting from a central axis ( 25 ) of the main body ( 2 ) and viewed along a direction perpendicular to the central axis ( 25 ), the at least two through openings ( 51 , 52 ) each are arranged between a radially outer edge of the first sealing region ( 21 ) and a radially inner edge of the second sealing region ( 22 ), wherein each of the at least two through openings ( 51 , 52 ) are completely arranged outside the first sealing region ( 21 ), wherein the second sealing region ( 22 ) surrounds both of the at least two through openings ( 51 , 52 ),
wherein the third sealing region ( 23 ) is formed in the form of a cone envelope ring, and
wherein a first depression ( 41 ) is formed in the main body ( 2 ) between the first sealing region ( 21 ) and the second sealing region ( 22 ), and wherein the at least two through openings ( 51 , 52 ) are respectively arranged between the first sealing region ( 21 ) and the second sealing region ( 22 ) and respectively open out into the first depression ( 41 ).
18. The pressure relief valve according to claim 17 , wherein the at least two through openings ( 51 , 52 ) are formed eccentrically and symmetrically in relation to the central axis ( 25 ) of the main body ( 2 ).
19. A pressure relief valve configured to be fastened on a packaging container, the pressure relief valve comprising:
a main body ( 2 ),
at least one through opening ( 51 ), which extends through the main body ( 2 ),
a diaphragm ( 6 ), which is arranged over the at least one through opening ( 51 ), and
a fluid ( 8 ), which is a silicone oil and is provided on the main body ( 2 ), the fluid ( 8 ) being arranged between the diaphragm ( 6 ) and the main body ( 2 ), and the fluid ( 8 ) having the effect that the diaphragm ( 6 ) is held on the main body ( 2 ) by adhesion,
the main body ( 2 ) having a first sealing region ( 21 ), a second sealing region ( 22 ) and a third sealing region ( 23 ),
the first sealing region ( 21 ), the second sealing region ( 22 ) and the third sealing region ( 23 ) being respectively formed as continuously closed,
the second sealing region ( 22 ) being arranged radially inside the third sealing region ( 23 ), the first sealing region ( 21 ) being arranged radially inside the second sealing region ( 22 ), the at least one through opening ( 51 ) being arranged between the first sealing region ( 21 ) and the second sealing region ( 22 ), and
the diaphragm ( 6 ) covering the first sealing region ( 21 ), the second sealing region ( 22 ) and the third sealing region ( 23 ),
wherein, starting from a central axis ( 25 ) of the main body ( 2 ) and viewed along a direction perpendicular to the central axis ( 25 ), the at least one through opening ( 51 ) is arranged between a radially outer edge of the first sealing region ( 21 ) and a radially inner edge of the second sealing region ( 22 ), and
wherein the third sealing region ( 23 ) is formed in the form of a cone envelope ring, and
wherein the first sealing region ( 21 ) and the second sealing region ( 22 ) respectively lie in a common sealing plane (E) perpendicular to the central axis ( 25 ) of the main body ( 2 ).