Contamination prevention in the blower of a ventilator
AssigneeLoewenstein Medical Technology S.A.
InventorChristian-Georg Schregel
Life of this patent
Estimating the term…
Abstract
A ventilator having at least one motor-operated blower for generating an air flow. The blower is configured and designed such that during the generation of the air flow in the blower different pressure regions with different pressures are formed in such a way that an air flow in the direction of the motor is prevented.
Claims18
A ventilator, wherein the ventilator comprises at least one motor-operated blower for generating an air flow S in the blower, the blower comprising
- a blower head comprising a rotatably mounted blower wheel,
- a motor part comprising a motor and a drive shaft for driving the blower wheel,
- a motor atrium arranged between the motor part and the blower head, the drive shaft leading from the motor through the motor atrium to the blower wheel through a passage between the motor atrium and the blower head,
- at least one feed line arranged on the motor atrium and/or the motor part through which a fluid is routed into the motor atrium,
- the blower being configured such that when the air flow S is generated, a first pressure P1 is formed in at least one first pressure region PB1 in the blower head and a second pressure P2 is formed in at least one second pressure region PB2 in the motor atrium, the second pressure P2 being applied via the at least one feed line and being higher than the first pressure P1 to prevent an air flow in a direction of the motor.
A blower for generating an airflow S in the blower, wherein the blower is suitable for use with a ventilator, is motor-operated and comprises
- a blower head comprising a rotatably mounted blower wheel,
- a motor part comprising a motor and a drive shaft for driving the blower wheel,
- a motor atrium arranged between the motor part and the blower head, the drive shaft leading from the motor through the motor atrium to the blower wheel through a passage between the motor atrium and the blower head,
- at least one feed line arranged on the motor atrium and/or the motor part through which a fluid is routed into the motor atrium,
- the blower being configured such that when the air flow S is generated, a first pressure P1 is formed in at least one first pressure region PB1 in the blower head and a second pressure P2 is formed in at least one second pressure region PB2 in the motor atrium, the second pressure P2 being applied via the at least one feed line and being higher than the first pressure P1 to prevent an air flow in a direction of the motor.
A method of preventing contamination in a motor-operated blower of a ventilator, wherein the blower comprises
- a blower head comprising a rotatably mounted blower wheel,
- a motor part comprising a motor and a drive shaft for driving the blower wheel,
- a motor atrium arranged between the motor part and the blower head, the drive shaft leading from the motor through the motor atrium to the blower wheel through a passage between the motor atrium and the blower head,
- at least one feed line arranged on the motor atrium and/or the motor part through which a fluid is routed into the motor atrium,
- and wherein the method comprises generating an air flow S in the blower head, forming a first pressure P1 in at least one first pressure region PB1 in the blower head and forming a second pressure P2 in at least one second pressure region PB2 in the motor atrium, and applying the second pressure P2 via the at least one feed line and causing it to be higher than the first pressure P1 to prevent an air flow in a direction of the motor.
Dependencies are inferred from the claim text.