Respiratory assistance apparatus with two-stage turbine

• US 20030084900A1
• Filed: 10/10/2002
• Published: 05/08/2003
• Est. Priority Date: 10/10/2001
• Status: Abandoned Application

• Current Assignee: L'Air Liquide SA
• Original Assignee: L'Air Liquide SA
• Inventors: Leclerc, Daniel, Kissi, Nourreddine, Brunner, Delphine, Aubatier, Francois, Preveyraud, Laurent
• Application Number:
  US10/269,026
• Publication Number:
  US 20030084900A1
• Time in Patent Office: Days
• US Class Current: 128/204.18
• CPC Class Codes: A61M 16/0057 Pumps therefor
• CPC Class Codes: A61M 16/0063 Compressors
• CPC Class Codes: A61M 16/0066 Blowers or centrifugal pumps
• CPC Class Codes: F04D 17/164 Multi-stage fans, e.g. for vacuum cleaners

Abstract

The invention relates to a respiratory assistance apparatus equipped with a turbine or compressor making it possible to deliver pressurized gas comprising a casing (1) having a gas inlet orifice (2), a motor (6) having a motor shaft (5) of axis (AA), the said motor shaft (5) being able to move about the axis (AA) when it is driven by the said motor (6), a first propeller (3) and a second propeller (4) mounted securely to the said motor shaft (5), an internal partition (7), arranged in the said casing (1), inserted between the two propellers (3, 4) so as to form a first stage (13) internal to the said casing (1) containing the first propeller (3) and a second stage (14) internal to the said casing (1) containing the second propeller (4), the said first stage (13) and second stage (14) being arranged in series, the said internal partition (7) comprising an opening (8) traversed by part of the motor shaft (5) and through which the first internal stage (13) is in fluid communication with the second internal stage (14), and a gas outlet orifice (15) for delivering pressurized gas.

Claims

1. Respiratory assistance or artificial ventilation apparatus comprising a turbine making it possible to deliver pressurized gas, comprising:

a casing (1) having a gas inlet orifice (2),

a motor (6) having a motor shaft (5) of axis (AA), the said motor shaft (5) being able to move about the axis (AA) when it is driven by the said motor (6),

a first propeller (3) and a second propeller (4) mounted securely to the said motor shaft (5),

an internal partition (7), arranged in the said casing (1), inserted between the two propellers (3, 4) so as to form a first stage (13) internal to the said casing (1) containing the first propeller (3) and a second stage (14) internal to the said casing (1) containing the second propeller (4), the said first stage (13) and second stage (14) being arranged in series, the said internal partition (7) comprising an opening (8) traversed by part of the motor shaft (5) and through which the first internal stage (13) is in fluid communication with the second internal stage (14), and

a gas outlet orifice (15) for delivering pressurized gas.

2. Apparatus according to claim 1, characterized in that the gas inlet orifice (2) of the turbine communicates with the first internal stage (13) of the casing (1), preferably the inlet orifice (2) is of axis (AA):

3. Apparatus according to either of claims 1 and 2, characterized in that the gas outlet orifice (15) of the turbine for delivering pressurized gas communicates with the second internal stage (14) of the casing (1).

4. Apparatus according to one of claims 1 to 3, characterized in that the motor (6) of the turbine is an electric motor, preferably a motor (6) powered with low-voltage current.

5. Apparatus according to one of claims 1 to 4, characterized in that the internal partition (7) of the turbine is secured to the internal wall of the casing (1), preferably the internal partition (7) and the casing (1) are made of injection-moulded plastic.

6. Apparatus according to one of claims 1 to 5, characterized in that the two propellers (3, 4) of the turbine are identical or different.

7. Apparatus according to one of claims 1 to 6, characterized in that the motor (6) of the turbine is arranged outside the casing (1).

8. Apparatus according to one of claims 1 to 7, characterized in that the wall of the second stage (14) of the casing (1) of the turbine, located facing the motor (6), comprises a passage (16) traversed by the motor shaft (5) of the said motor (6), preferably sealing means (17) arranged around the said passage (16) make it possible to prevent or to minimize any outlet of gas through the said passage (16).

9. Apparatus according to one of claims 1 to 8, characterized in that the two propellers (3, 4) of the turbine are fitted with blades and without a flange.

10. Respiratory assistance apparatus according to one of claims 1 to 9, comprising a mixing compartment (20) making it possible to mix a first gas with oxygen, the said turbine (30) being arranged downstream of the said gas mixing compartment (20).

11. Apparatus according to claim 10, characterized in that it further comprises:

a first gas line (21) capable of conveying air, the said first gas, into the mixing compartment (20) so as to supply the compartment (20) with air, the said first gas,

a second gas line (22) capable of conveying oxygen into the mixing compartment (20) so as to supply the said mixing compartment (20) with oxygen, the second gas line (22) comprising;

a valve (23) with proportional opening making it possible to control the flow rate of oxygen flowing in the said second gas line (22), and

an oxygen flow rate sensor (24) making it possible to measure the flow rate of oxygen flowing in the said second gas line (22), and

a flow rate sensor (27) measuring the total flow rate of the gas mixture.

12. Apparatus according to claim 11, characterized in that the valve (23) with proportional opening is a solenoid valve and/or the valve (23) with proportional opening is controlled by control means (25) connected (23′

) to the said valve (23) and/or the oxygen flow rate sensor (24) is connected (24′

) to the control means (25).