Ultrasonic oxygen humidifier

• US 4,993,411 A
• Filed: 04/06/1990
• Issued: 02/19/1991
• Est. Priority Date: 04/06/1990
• Status: Expired due to Fees

• Current Assignee: Medway
• Original Assignee: Medway
• Inventors: Callaway, James J.
• Primary Examiner(s): Burr, Edgar S.
• Assistant Examiner(s): RACITI, ERIC
• Application Number:
  US07/505,510
• Time in Patent Office: 319 Days
• Field of Search: 128/200.16, 128/204.14, 128/200.14, 128/203.12, 261/DIG. 65
• US Class Current: 128/204.14
• CPC Class Codes: A61M 15/0085 using ultrasonics spraying or atomising liquids using ultrasonic vibrations in general B05B17/06
• CPC Class Codes: A61M 16/16 Devices to humidify the respiration air A61M16/1045 takes precedence
• CPC Class Codes: A61M 16/161 with means for measuring the humidity
• CPC Class Codes: A61M 16/167 acting vertically on the valve
• CPC Class Codes: Y10S 261/65 Vaporizers

Abstract

A closed vertical mixing chamber is defined above a predetermined plan area of a body of water and an upright tubular member including open upper and lower ends is supported over a central zone of the area spaced slightly above the water level. Structure is provided defining a closed inlet chamber above lower end of the tubular member and about the latter into which gas to be humidified is admitted. The gas is discharged downwardly from the inlet chamber about the lower end of the tubular member toward the water level and at locations spaced outwardly from and about the tubular and electro-acoustical transducer structure is operatively associated with the water in the zone for generating a column of water projecting upwardly above the level and having finely divided particles of water emanating therefrom. The gas moves inwardly over the surface of the water toward the water column and thereafter upwardly into the tubular member about the water column. The upper end of the tubular member opens into the upper end portion of the mixing chamber for discharging humidified gas thereinto and a gas outlet is provided opening outwardly of a lower portion of the mixing chamber adjacent the lower end of the tubular member.

Claims

1. A gas humidifying apparatus defining a reservoir containing a liquid therein to a predetermined level, closure means defining a closed vertical chamber above said level, closed at its lower end by said liquid, an electro-acoustical transducer operatively associated with said reservoir below said level and in conjunction with said liquid in said reservoir to said level and by vibration of said liquid at ultrasonic frequency and with sufficient amplitude to develop a localized column of said liquid above said level as well as finely divided water particles emanating from said column, an upright tube within said chamber including open upper and lower ends, said lower end being vertically registered with said column, spaced outwardly therefrom and closely spaced above said level, partition means in said chamber adjacent and spaced above said level and about the lower end portion of said tube and dividing said chamber, outwardly of said tube, into upper and lower chamber sections into which the upper and lower ends, respectively, of said tube open, gas inlet means opening into said lower chamber section for discharging gas under controlled pressure into said lower chamber section, and humidified gas outlet means opening outwardly of said upper chamber section, a foraminated gas distribution partition in said chamber spaced below said partition means above said level and about the lower end portion of said tube defining a gas inlet chamber below and above said upper and lower chamber sections into which said gas inlet means opens.

2. The apparatus of claim 1 wherein said humidified gas outlet opens outwardly of the lower half of said upper chamber section and said upper end of said tube opens outwardly into the upper half of said upper chamber section.

3. The apparatus of claim 1 wherein said liquid comprises water and said gas inlet means comprises inlet means for oxygen.

4. The assembly of claim 1 wherein said electro-acoustical transducer includes a variable control therefore for varying the amplitude of the output thereof.

5. A gas humidifying apparatus defining a reservoir containing liquid therein to a predetermined level, closure means defining a closed vertical chamber above said level, closed at its lower end by said liquid, an electro-acoustical transducer operatively associated with said reservoir below said level and in conjunction with said liquid in said reservoir to said level and by vibration of said liquid at ultrasonic frequency and with sufficient amplitude to develop a localized column of said liquid above said level as well as finely divided water particles emanating from said column, an upright tube within said chamber including open upper and lower ends, said lower end being vertically registered with said column, spaced outwardly therefrom and closely spaced above said level, partition means in said chamber adjacent and spaced above said level and about the lower end portion of said tube and dividing said chamber, outwardly of said tube, into upper and lower chamber sections into which the upper and lower ends, respectively, of said tube open, gas inlet means opening into said lower chamber section for discharging gas under controlled pressure into said lower chamber section, and humidified gas outlet means opening outwardly of said upper chamber section, said closure means incorporating a top wall including a transparent bulbous portion thereof spaced closely above the upper end of said tube for viewing the amount of vapor being discharged from said tube upper end from the exterior of said closure means.

6. The apparatus of claim 5 wherein the open upper end of said tube opening into said transparent bulbous portion comprises a reduced cross sectional area outlet for the upper end of said tube.

7. The apparatus of claim 6 wherein said electro-acoustical transducer includes a variable control therefore for varying the amplitude of the output thereof.

8. The apparatus of claim 7 including a foraminated gas distribution partition in said chamber spaced below said partition means above said level and about the lower end portion of said tube defining a gas inlet chamber below and above said upper and lower chamber sections into which said gas inlet means opens.

9. The apparatus of claim 8 wherein said liquid comprises water and said gas inlet means comprises inlet means for oxygen.

10. In a humidifier including a reservoir containing water to a predetermined level, means defining a closed mixing chamber above said level, an upright tubular member having open upper and lower ends supported within said mixing chamber with said lower end spaced slightly above said level, chamber defining means defining a closed gas inlet chamber above said lower end and about the latter into which gas to be humidified is admitted into said closed inlet chamber, said chamber defining means including gas discharge means operative to downwardly discharge gas from said inlet chamber about said lower end of said tubular member toward said level and at a plurality of locations spaced evenly about and outwardly from said lower end, electro-acoustical transducer means operatively associated with said reservoir and the water therein in said zone for generating a column of water projecting upwardly above said level, in said zone and having finely divided particles of water emanating therefrom, said upper end opening outwardly into an upper portion of said mixing chamber, and humidified gas outlet means opening outwardly of a lower portion of said inlet chamber.

11. The humidifier of claim 10 wherein said mixing chamber is closed at its upper end by a transparent wall portion upwardly toward which said upper end of said tubular member opens.

12. The humidifier of claim 11 wherein said open upper end of said tubular member is reduced in cross sectional area relative to the cross sectional area of the lower end of said tubular member.

13. The method of obtaining at least substantial full evaporation of water by oxygen during an oxygen humidification process wherein medicinal dry oxygen is being humidified to between 60% and 90% relative humidity, said method including, in combination with a body of water and a closed chamber sealed relative to and disposed over the surface of said body of water and including a transparent upper wall portion forming at least a portion of an upper end closure for said chamber, providing an upstanding chimney within said chamber having an open lower end spaced slightly above a predetermined area of the surface of said body of water and an open upper end spaced slightly below said transparent wall portion, providing a partition in said chamber above said lower end to divide said chamber into closed upper and lower chamber sections, acting upon said body of water by a variable amplitude electro-acoustical transducer to generate a column of water projecting upwardly from a central zone of said predetermined area of said surface as well as finely divided water particles emanating from said column, causing dry oxygen to pass over said surface toward said column from all sides thereof, upwardly into and through said chimney and outwardly of the latter and into an upper portion of said upper chamber section and thereafter downwardly through said upper chamber section about said chimney and outwardly from a lower portion of said upper chamber section for conveyance to a patient, and varying the amplitude of said transducer such that only a slight amount of water vapor may be observed through said transparent wall portion in the oxygen being discharged from the upper end of said chimney into said upper chamber section.