Variable set point oxygen concentration mixer
First Claim
1. Apparatus for mixing two gasses, at least one of which contains oxygen, to a desired concentration of oxygen, comprising:
- a) a mixing plenum;
b) an inlet valve for admitting said two gasses into said mixing plenum;
c) an oxygen sensor for detecting oxygen concentration of mixed gasses in said mixing plenum and in response generating an output signal representative thereof; and
d) a controller for receiving said output signal and a user input representing said desired concentration of oxygen, comparing said oxygen concentration of said mixed gasses represented by said output signal to said desired concentration of oxygen represented by said user input, and in response controlling said inlet valve to regulate flow of respective ones of said two gasses into said mixing plenum and thereby maintain said desired concentration of oxygen.
2 Assignments
0 Petitions
Accused Products
Abstract
Apparatus for mixing two gasses, at least one of which contains oxygen, to a desired concentration of oxygen, comprising a mixing plenum, an inlet valve, for admitting one of the two gasses into the mixing plenum, an oxygen sensor for detecting oxygen concentration of mixed gasses in the mixing plenum and in response generating an output signal representative thereof, and a controller for receiving the output signal and a user input representing the desired concentration of oxygen, comparing the oxygen concentration of the mixed gasses represented by the output signal to the desired concentration of oxygen, and in response controlling the inlet valve to regulate flow of respective ones of the two gasses into the mixing plenum and thereby maintain the desired concentration of oxygen.
64 Citations
29 Claims
-
1. Apparatus for mixing two gasses, at least one of which contains oxygen, to a desired concentration of oxygen, comprising:
-
a) a mixing plenum; b) an inlet valve for admitting said two gasses into said mixing plenum; c) an oxygen sensor for detecting oxygen concentration of mixed gasses in said mixing plenum and in response generating an output signal representative thereof; and d) a controller for receiving said output signal and a user input representing said desired concentration of oxygen, comparing said oxygen concentration of said mixed gasses represented by said output signal to said desired concentration of oxygen represented by said user input, and in response controlling said inlet valve to regulate flow of respective ones of said two gasses into said mixing plenum and thereby maintain said desired concentration of oxygen. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. Apparatus for mixing two gases, at least one of which contains oxygen, to a desired concentration of oxygen, comprising:
-
a mixing plenum including a primary mixing plenum having an inlet connected to said inlet valve, a secondary mixing plenum having an inlet and an outlet, and an orifice intermediate an outlet of said first mixing plenum and the inlet of said second mixing plenum; an inlet valve for admitting said two gases into said mixing plenum; an oxygen sensor for detecting oxygen concentration of mixed gases in said mixing plenum and in response generating an output signal representative thereof; a controller for receiving said output signal and a user input representing said desired concentration of oxygen, comparing said oxygen concentration of said mixed gases represented by said output signal to said desired concentration of oxygen represented by said user input, and in response to controlling said inlet valve to regulate flow of respective ones of said two gases into said mixing plenum and thereby maintain said desired concentration of oxygen; an outlet valve connected to said controller for receiving said mixed gases from said mixing plenum and, under control of said controller, venting said mixed gases in the event said oxygen concentration of said mixed gases is outside of a predetermined range of tolerance from said desired oxygen concentration and outputting said mixed gases in the event said oxygen concentration of said mixed gases is within said predetermined range of tolerance from said desired oxygen concentration; and a back pressure regulator, a product plenum and an additional orifice are connected in series intermediate said secondary mixing plenum and said outlet valve. - View Dependent Claims (12, 13, 14, 15)
-
-
16. A gas mixer for mixing two gases to a desired oxygen concentration level, at least one of the two gases including oxygen, comprising:
-
a first gas supply; a second gas supply; a mixing valve connected to said first gas supply and said second gas supply; a mixing plenum connected to said mixing valve; an oxygen sensor for detecting an oxygen concentration of the two gases mixed in said mixing plenum and in response generating an output signal representative thereof; and a controller for receiving said output signal and a user input representing said desired concentration of oxygen, comparing said oxygen concentration of said mixed gases represented by said output signal to said desired concentration of oxygen represented by said user input, and in response to controlling said mixing valve to regulate flow of respective ones of said two gases into said mixing plenum and thereby maintain said desired concentration of oxygen. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23)
-
-
24. A method of mixing two gases to a desired oxygen concentration level, comprising:
-
supplying a first gas to a mixing valve; supplying a second gas to the mixing valve; flowing the first gas and the second gas through the mixing valve and mixing the first and second gases in a mixing plenum; detecting an oxygen concentration level of the two gases mixed in the mixing plenum and in response generating an output signal representative thereof; controlling the flow of the first gas and the second gas into the mixing plenum based on the output signal and a user input representing a desired concentration of oxygen by comparing the output signal against the desired concentration to maintain the desired concentration of oxygen. - View Dependent Claims (25, 26, 27, 28, 29)
-
Specification