Housing for a fluid machine, in particular for a radial fan

1. A housing ( 1 ) for a radial fan ( 2 ), having;

at least one housing part ( 3 ), wherein the housing part ( 3 ) has at least one inlet opening ( 7 ), wherein a fluid chamber ( 8 ) for accommodating at least one fan wheel ( 9 ) can be at least partially delimited the housing part ( 3 ), wherein the inlet opening ( 7 ) has, at least in certain portions, a curved inlet face ( 11 ),

more than one guide element ( 21 ) extends from the inlet face ( 11 ) in the direction of a central axis of the inlet opening ( 7 ), and

wherein at least a proportion of the guide elements ( 21 ) are spaced apart over the circumference of the inlet face ( 11 ) with spacings (A 1 , A 2 , A 3 , A 4 , A 5 ) which relate to one another in accordance with the Fibonacci sequence.

2. The housing ( 1 ) as claimed in claim 1 ,

further having an inlet ring ( 20 ) which at least partially covers the inlet opening ( 7 ) is held by the guide element ( 21 ) on the housing part ( 3 ).

3. The housing ( 1 ) as claimed in claim 2 ,

wherein the inlet ring ( 20 ) has a surface ( 23 ) which is oriented in the direction of the inlet face ( 11 ) and which has a cross section which at least partially has the form of a logarithmic spiral, and/or in that the inlet ring ( 20 ) has a surface ( 24 ) which is averted from the inlet face ( 11 ) and which has a cross section which at least partially has the form of a logarithmic spiral.

4. The housing ( 1 ) as claimed in claim 3 , wherein the logarithmic spiral is further defined as a Fibonacci spiral.

5. The housing ( 1 ) as claimed in claim 1 ,

wherein the guide element ( 21 ) has at least one guide face ( 22 a , 22 b ) with an at least two-dimensional extent.

6. The housing ( 1 ) as claimed in claim 5 , wherein the guide face ( 22 a , 22 b ) is curved.

7. The housing ( 1 ) as claimed in claim 6 , wherein the guide face ( 22 a , 22 b ) is inclined relative to a central axis (M) of the inlet opening ( 7 ).

8. The housing ( 1 ) as claimed in claim 5 , wherein from two and ten guide elements ( 21 ) are provided.

9. The housing ( 1 ) as claimed in claim 1 ,

wherein the housing part ( 3 ) is formed from a plastic.

10. The housing ( 1 ) as claimed in claim 9 , wherein the housing part ( 3 ) is formed as a single piece from one of injection molding or an additive production process or 3D printing.

11. A radial fan ( 2 ), having at least one fan wheel ( 9 ), wherein the fan wheel ( 9 ) can be driven by a drive means, and wherein the fan wheel ( 9 ) is arranged rotatably in a fluid chamber ( 9 ) of a housing ( 1 ), the housing having

at least one housing part ( 3 ), wherein the housing part ( 3 ) has at least one inlet opening ( 7 ), wherein a fluid chamber ( 8 ) for accommodating at least one fan wheel ( 9 ) can be at least partially delimited by the housing part ( 3 ), wherein the inlet opening ( 7 ) has, at least in certain portions, a curved inlet face ( 11 ), and between two and ten guide elements ( 21 ), are provided and extends from the inlet face ( 11 ) in the direction of a central axis of the inlet opening ( 7 ), and

wherein at least a proportion of the guide elements ( 21 ) are spaced apart over the circumference of the inlet face ( 11 ) with spacings (A 1 , A 2 , A 3 , A 4 , A 5 ) which relate to one another in accordance with the Fibonacci sequence.

12. A housing ( 1 ) for a radial fan ( 2 ), having;

at least one housing part ( 3 ), wherein the housing part ( 3 ) has at least one inlet opening ( 7 ), wherein a fluid chamber ( 8 ) for accommodating at least one fan wheel ( 9 ) can be at least partially delimited the housing part ( 3 ), wherein the inlet opening ( 7 ) has, at least in certain portions, a curved inlet face ( 11 ),

at least one guide element ( 21 ) extends from the inlet face ( 11 ) in the direction of a central axis of the inlet opening ( 7 ), and

wherein the curved inlet face ( 11 ), in cross section, at least partially has the form of a logarithmic spiral; and the logarithmic spiral is a Fibonacci spiral having at least two different radii.

13. The housing ( 1 ) as claimed in claim 12 , wherein the inlet opening ( 7 ) is surrounded by a domed elevation ( 15 ), and in that the inlet face ( 11 ) extends at least partially on the domed elevation ( 15 ) and wherein the domed elevation ( 15 ) is at least partially surrounded by a honeycomb-like supporting structure ( 5 ) having a height that corresponds to a height ( 14 ) of the domed elevation ( 15 ).

14. A housing ( 1 ) for a radial fan ( 2 ), having;

at least one housing part ( 3 ), wherein the housing part ( 3 ) has at least one inlet opening ( 7 ), wherein a fluid chamber ( 8 ) for accommodating at least one fan wheel ( 9 ) can be at least partially delimited the housing part ( 3 ), wherein the inlet opening ( 7 ) has, at least in certain portions, a curved inlet face ( 11 ),

at least one guide element ( 21 ) extends from the inlet face ( 11 ) in the direction of a central axis of the inlet opening ( 7 ), and

an encircling set-back structure ( 25 ) which at least partially circumferentially surrounds the inlet opening ( 7 ) and the encircling set-back structure ( 25 ) has a basic cross section ( 27 ) in at least one first arc segment ( 26 ) along the circumference, and has a varying fill cross section ( 29 ) in at least one second arc segment ( 28 ).

15. The housing ( 1 ) as claimed in claim 14 , wherein the encircling set-back structure ( 25 ) has a free basic area ( 30 ) in the basic cross section ( 27 ), and in that the free basic area ( 30 ) is reduced in the fill cross section ( 29 ).

16. The housing ( 1 ) as claimed in claim 14 , wherein the fill cross section ( 29 ) has a continuous or discontinuous profile ( 33 ) including a linear, arcuate and/or stepped profile ( 33 ).