Treatment device for treating fluids, in particular liquid fluids, and treatment element of treatment device

1. A treatment element ( 14 ) of a treatment device for treating and/or filtering fluids, comprising:

a filter bellows ( 66 ) of a filter medium;

a housing ( 56 ) comprising;

a housing pot ( 58 ) having a peripheral outer wall surrounding a connecting axis of the treatment element, the housing pot ( 58 ) is open end at a first axial end of the housing pot;

wherein the filter bellows ( 66 ) is arranged in an interior of the housing pot ( 58 );

a housing cover ( 60 ) permanently fixed onto the housing pot ( 58 ) at the open end of the housing pot, the housing cover ( 60 ) retaining the filter bellows ( 66 ) within the interior of the housing pot ( 58 );

at least one inlet ( 88 ) for the fluid to be treated; and

at least one outlet ( 82 ) for the treated fluid;

wherein the treatment element ( 14 ) is configured to connect to a connecting head ( 12 ) of the treatment device ( 10 ) by means of a releasable bayonet-type connecting device ( 34 ) through the execution of a rotational/plug-in movement about the connecting axis ( 20 ) of the treatment device ( 10 );

the connecting device ( 34 ) having a housing connecting part ( 100 ) arranged at the open end of the housing pot ( 58 ), the connecting device configured to interact with at least one head connecting part ( 32 ) of the connecting head ( 12 ) for the purpose of connecting the connecting device ( 34 );

wherein the at least one inlet ( 88 ) can be connected to at least one feed ( 16 ) of the connecting head ( 12 ) for the fluid to be treated and/or the at least one outlet ( 82 ) can be connected to at least one discharge ( 18 ) of the connecting head ( 12 ) for the treated fluid;

wherein the housing connecting part ( 100 ) is arranged axially between an axial outer surface of the housing cover ( 60 ) and the first axial end of the housing pot ( 58 ), the housing connecting part having:

a radial outer portion of the housing connecting part ( 100 ) forming a housing mount section ( 102 ) that rests against the axial outer surface of the housing cover ( 60 ), the housing mounting section arranged in the interior of the peripheral outer wall of the housing pot ( 58 );

a radial inner portion of the housing connecting part ( 100 ) forming a plurality of housing-side bayonet sections ( 104 ) which project radially inwardly from the housing mount section ( 102 ), the housing-side bayonet sections ( 104 ) are spaced apart circumferentially about the connecting axis ( 20 );

wherein each of the plurality of housing-side bayonet sections ( 104 ), in a circumferential direction, rise axially outwardly away from the housing cover ( 60 ) towards a latching projection formed at a circumferential end of the plurality of housing- side bayonet sections ( 104 ); and

each of the plurality of housing-side bayonet sections ( 104 ) having, on axially opposite sides, an inner functional surface ( 106 ) and an outer functional surface ( 108 ), the functional surfaces extending helically about the connecting axis ( 20 ), the plurality of housing-side bayonet sections ( 104 ) spaced circumferentially apart from each other; and

a sealing ring ( 96 ) arranged on the housing cover ( 60 ) and spaced radially inwardly away from the housing connecting part ( 100 ), for sealing a fluid-carrying region of the treatment device to an outside environment.

2. The treatment element ( 14 ) according to claim 1 , wherein

the housing connecting part ( 100 ) is attached to the housing by means of a crimped connection between the housing cover and the housing pot.

3. The treatment element ( 14 ) according to claim 1 , wherein

the housing cover ( 60 ) comprises sheet metal.

4. The treatment element ( 14 ) according to claim 1 , wherein

a material thickness of the housing cover ( 60 ) is 0.4 to 1 mm.

5. The treatment element ( 14 ) according to claim 1 , wherein

the housing cover ( 60 ) includes a coaxial outer sealing connecting piece ( 92 ) surrounding the at least one inlet ( 88 ), and wherein the sealing ring ( 96 ) is arranged on the coaxial outer sealing connecting piece ( 92 );

the sealing ring ( 96 ) projects upward by up to 5 mm in the axial direction beyond an uppermost point of the housing connecting part ( 100 ) in the axial direction, and projects downward by up to 5 mm in the axial direction beyond a lowermost point of the housing connecting part ( 100 ) in the axial direction.

6. The treatment element according to claim 1 , wherein the at least one head connecting part ( 32 ) comprises sheet metal.

7. The treatment element ( 14 ) according to claim 1 , wherein the material thickness of the housing connecting part ( 100 ) is at most 3 mm.

8. A treatment device ( 10 ) for filtering fluids comprising:

a treatment element ( 14 ) comprising:

a filter bellows ( 66 ) of a filter medium;

a housing ( 56 ) comprising:

a housing pot ( 58 ) having a peripheral outer wall surrounding a connecting axis of the treatment element, the housing pot ( 58 ) is open end at a first axial end of the housing pot;

wherein the filter bellows ( 66 ) is arranged in an interior of the housing pot ( 58 );

a housing cover ( 60 ) permanently fixed onto the housing pot ( 58 ) at the open end of the housing pot, the housing cover ( 60 ) retaining the filter bellows ( 66 ) within the interior of the housing pot ( 58 );

at least one inlet ( 88 ) for the fluid to be treated; and

at least one outlet ( 82 ) for the treated fluid;

a releasable bayonet-type connecting device ( 34 ) having a housing connecting part ( 100 ) arranged at the open end of the housing pot ( 58 ), the connecting device configured to interact with at least one head connecting part ( 32 ) of a connecting head ( 12 ) for the purpose of connecting the connecting device ( 34 );

wherein the treatment element ( 14 ) is connected to the connecting head ( 12 ) of the treatment device ( 10 ) by means of the releasable bayonet-type connecting device ( 34 ) through the execution of a rotational/plug-in movement about the connecting axis ( 20 ) of the treatment device ( 10 );

the connecting head ( 12 ) comprising:

at least one feed ( 16 ) for the fluid to be treated, said feed being connectable to the at least one inlet ( 88 ), and/or at least one discharge ( 18 ) for the treated fluid, said discharge being connectable to the at least one outlet ( 82 );

wherein the connecting head ( 12 ) and the treatment element ( 14 ) are connected to each other by means of the releasable bayonet-type connecting device ( 34 ) through the execution of a rotational/plug-in movement about the connecting axis ( 20 ) of the treatment device ( 10 ); and

wherein at least one head second connecting part ( 32 ) has at least one counter functional surface ( 44 ) that engages one of the functional surfaces ( 106 ) of the connecting part ( 100 ) from behind;

wherein the material thickness of the housing connecting part ( 100 ) is constant at least in the region of the at least one functional surface ( 106 , 108 );

wherein the housing connecting part ( 100 ) is arranged axially between an axial outer surface of the housing cover ( 60 ) and the first axial end of the housing pot ( 58 ), the housing connecting part having:

a radial outer portion of the housing connecting part ( 100 ) forming a housing mount section ( 102 ) that rests against the axial outer surface of the housing cover ( 60 ), the housing mounting section arranged in the interior of the peripheral outer wall of the housing pot ( 58 );

a radial inner portion of the housing connecting part ( 100 ) forming a plurality of housing-side bayonet sections ( 104 ) which project radially inwardly from the housing mount section ( 102 ), the housing-side bayonet sections ( 104 ) are spaced apart circumferentially about the connecting axis ( 20 );

wherein each of the plurality of housing-side bayonet sections ( 104 ), in a circumferential direction, rise axially outwardly away from the housing cover ( 60 ) towards a circumferential end of the plurality of housing-side bayonet sections ( 104 ); and

each of the plurality of housing-side bayonet sections ( 104 ) having, on axially opposite sides, an inner functional surface ( 106 ) and an outer functional surface ( 108 ), the inner or outer functional surfaces extending helically about the connecting axis ( 20 ), the plurality of housing-side bayonet sections ( 104 ) spaced circumferentially apart from each other; and

a sealing ring ( 96 ) arranged on the housing cover ( 60 ) and spaced radially inwardly away from the housing connecting part ( 100 ), for sealing a fluid-carrying region of the treatment device to an outside environment.

9. The treatment device ( 10 ) according to claim 8 , wherein

the housing cover ( 60 ) includes a coaxial outer sealing connecting piece ( 92 ) surrounding the at least one inlet ( 88 ), and having the sealing ring ( 96 ) arranged on the coaxial outer sealing connecting piece ( 92 );

wherein the sealing ring ( 96 ) projects upward by up to 5 mm in the axial direction beyond an uppermost point of the housing connecting part ( 100 ) in the axial direction, and projects downward by up to 5 mm in the axial direction beyond a lowermost point of the housing connecting part ( 100 ) in the axial direction.

10. The treatment device ( 10 ) according to claim 9 , wherein

the sealing ring ( 96 ) is arranged radially within the housing connecting part ( 100 ).

11. The treatment device according to claim 8 , wherein the at least one counter functional surface ( 44 ) and the inner functional surface ( 106 ) of the plurality of housing-side bayonet sections ( 104 ) interacting therewith each comprise at least one latch element ( 46 , 110 ) as a latching projection.

12. The treatment device according to claim 8 , wherein

the connecting device ( 34 ) comprises at least one biasing element ( 54 ; 190 ) for realizing a mechanical biasing with which the at least one counter functional surface ( 44 ) is pressed against the inner functional surface ( 106 ).

13. The treatment device according to claim 8 , wherein

a material thickness of the at least one head connecting part ( 32 ) and/or the housing connecting part ( 100 ) is at most 3 mm.

14. The treatment device according to claim 8 , wherein an axial extension of the at least one insert gap ( 50 ) is at most 3 mm.

15. The treatment device according to claim 8 , wherein the at least one head connecting part ( 32 ) and/or the housing connecting part ( 100 ) comprise(s) sheet metal.