Radial blower, in particular, for a breathing apparatus
AssigneePapst-Motoren GmbH & Co. KG
InventorsGeorg Eimer, Wolfgang Fehrenbacher, Fritz Schmider
Life of this patent
Estimating the term…
Abstract
A radial blower, in particular, for a breathing apparatus, has a blower housing with a central, axial intake opening and a radial or approximately tangential outlet opening as well as a motor-driven radial blower wheel arranged axially between the intake opening and the outlet opening. The radial blower wheel has a cover disk at the axial side facing the outlet opening with such a large diameter that between the outer circumference of the cover disk and an inner circumferential surface of the housing a constricted annular flow gap for the medium flowing through the radial blower wheel in the direction toward the outlet opening is formed.
Claims26
A radial blower (1) comprising:
- a blower housing (2) having a central, axial intake opening (4) and at least one of a radial outlet opening and a substantially tangential outlet opening (6);
- a motor-driven radial blower wheel (8) arranged in the blower housing (2) axially between the intake opening (4) and the at least one of a radial outlet opening and a substantially tangential outlet opening (6), wherein the radial blower wheel (8) comprises a first cover disk (10) arranged at an axial side of the radial blower wheel (8) facing the at least one of a radial outlet opening and a substantially tangential outlet opening (6);
- wherein the first cover disk (10) has such a diameter (D1) that a constricted annular flow gap (30) for a medium, flowing through the radial blower wheel (8) from the intake opening (4) in the direction toward the at least one of a radial outlet opening and a substantially tangential outlet opening (6), is formed between an outer circumference (26) of the first cover disk (10) and an inner circumferential surface (28) of the blower housing (2);
- wherein the flow gap (30) has an annular flow cross-section (AR) which has a range of smaller than up to maximally 60% greater than the flow cross-section (AA) of the at least one of a radial outlet opening and a substantially tangential outlet opening (6).
A radial blower (1) comprising:
- a blower housing (2) having a central, axial intake opening (4) and at least one of a radial outlet opening and a substantially tangential outlet opening (6);
- a radial blower wheel (8) having a central intake area (16) and being arranged within the blower housing (2) such that the central intake area (16) is arranged adjacent to the intake opening (4);
- an intake spiral (18) having a spiral channel (20) connected to the blower housing (2) on an exterior housing side having arranged therein the intake opening (4) so that the intake spiral (18) is positioned upstream of the intake opening (4) and a medium flows radially or approximately tangentially (22) into the spiral channel (20) of the intake spiral (18) and from the spiral channel (20) axially into the intake opening (4);
- wherein the spiral channel (20) is delimited by a spirally shaped channel wall (38) which ends in the vicinity of the intake opening (4) such that any imaginary tangent (40) placed on the channel wall (38) is positioned outside of the intake opening (4) and the intake area (16) of the blower wheel(S) or is at most positioned tangentially thereto.
Dependencies are inferred from the claim text.