Methods, systems and devices using LOX to provide ventilatory support
First Claim
Patent Images
1. A portable liquid oxygen system providing an average flow rate of oxygen gas at approximately 6 lpm to approximately 20 lpm using a rapid gas conversion mode, the portable liquid oxygen system comprising:
- a liquid oxygen store;
a heat exchanger for evaporating liquid oxygen from the liquid oxygen store into oxygen gas;
a Stirling engine having a heat source and a heat sink, wherein the heat source is an opening to ambient air and wherein the heat sink is proximal to the liquid oxygen store; and
a fan, wherein during the rapid gas conversion mode, the Stirling engine drives the fan to blow ambient air from the heat source across the heat exchanger to more rapidly evaporate liquid oxygen from the liquid oxygen store into oxygen gas.
10 Assignments
0 Petitions
Accused Products
Abstract
A portable liquid oxygen system may provide an average flow rate of oxygen gas at approximately 6-approximately 20 lpm using a rapid gas conversion mode. The rapid gas conversion mode utilizes a Stirling engine that harnesses the heat differential between the ambient temperature and the liquid oxygen store to drive a fan. The fan operates to blow ambient air across a heat exchanger, which allows the heat exchanger to more rapidly evaporate liquid oxygen into oxygen gas.
997 Citations
19 Claims
-
1. A portable liquid oxygen system providing an average flow rate of oxygen gas at approximately 6 lpm to approximately 20 lpm using a rapid gas conversion mode, the portable liquid oxygen system comprising:
-
a liquid oxygen store; a heat exchanger for evaporating liquid oxygen from the liquid oxygen store into oxygen gas; a Stirling engine having a heat source and a heat sink, wherein the heat source is an opening to ambient air and wherein the heat sink is proximal to the liquid oxygen store; and a fan, wherein during the rapid gas conversion mode, the Stirling engine drives the fan to blow ambient air from the heat source across the heat exchanger to more rapidly evaporate liquid oxygen from the liquid oxygen store into oxygen gas. - View Dependent Claims (2, 3, 4, 5)
-
-
6. A ventilation system comprising:
-
a portable ventilator; and a portable liquid oxygen (LOX) system providing a flow rate of oxygen gas evaporated from a liquid oxygen store to the portable ventilator at approximately 6 lpm to approximately 20 lpm using a rapid gas conversion mode, the portable LOX system comprising; a heat exchanger for evaporating the liquid oxygen from the liquid oxygen store into oxygen gas; a Stirling engine having a heat source and a heat sink, wherein the heat source is an opening to ambient air and wherein the heat sink is proximal to the liquid oxygen store; and a fan, wherein during the rapid gas conversion mode, the Stirling engine drives the fan to blow ambient air from the heat source across the heat exchanger to more rapidly evaporate liquid oxygen from the liquid oxygen store into oxygen gas. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14)
-
-
15. A liquid oxygen system having a rapid gas conversion mode, the liquid oxygen system comprising:
-
a liquid oxygen store; a heat exchanger for evaporating liquid oxygen from the liquid oxygen store into oxygen gas; a Stirling engine having a heat source and a heat sink, wherein the heat source is an opening to ambient air and wherein the heat sink is proximal to the liquid oxygen store; and a fan, wherein during the rapid gas conversion mode, the Stirling engine drives the fan to blow ambient air from the heat source across the heat exchanger to more rapidly evaporate liquid oxygen from the liquid oxygen store into oxygen gas. - View Dependent Claims (16, 17, 18, 19)
-
Specification