IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
UP-0569463
(2004-08-26)
|
등록번호 |
US-7682428
(2010-04-21)
|
우선권정보 |
JP-2003-301021(2003-08-26); JP-2003-309861(2003-09-02) |
국제출원번호 |
PCT/JP2004/012694
(2004-08-26)
|
§371/§102 date |
20060224
(20060224)
|
국제공개번호 |
WO05/018789
(2005-03-03)
|
발명자
/ 주소 |
- Nawata, Hideo
- Fujimoto, Naotoshi
- Kurome, Kanji
- Matsubara, Sadakazu
|
출원인 / 주소 |
|
대리인 / 주소 |
Rader, Fishman & Grauer, PLLC
|
인용정보 |
피인용 횟수 :
8 인용 특허 :
3 |
초록
▼
An oxygen concentration apparatus (300) according to the present invention has: pressure swing adsorption type oxygen concentration means (310); and a control means (350) that controls switching means (316) that switches between intake of pressurized air into an adsorption column (312) and exhaust f
An oxygen concentration apparatus (300) according to the present invention has: pressure swing adsorption type oxygen concentration means (310); and a control means (350) that controls switching means (316) that switches between intake of pressurized air into an adsorption column (312) and exhaust from the adsorption column. The switching means is controlled based on pressure in oxygen concentrated gas in the conduit measured by pressure measuring means to adjust a cycle of adsorption and regeneration processes of the oxygen concentration means so that pressure at the upstream of flow rate adjusting means (340) can be controlled and, as a result, the need for a mechanical pressure regulating valve, that has been needed conventionally, can be eliminated. Further, there is also shown a gas supply apparatus that comprises ultrasonic type gas concentration and flow rate measuring means that comprises, in turn, two ultrasonic transducers that is disposed in an opposed manner in the conduit through which product gas flows so that a concentration value measured when the product gas output is stopped is determined to be a product gas concentration.
대표청구항
▼
What is claimed is: 1. An oxygen concentration apparatus comprising: pressure swing adsorption type oxygen concentration means including: at least one adsorption column formed of a cylinder hollow having first and second ports, an inside of said cylinder hollow is filled with an adsorbent selective
What is claimed is: 1. An oxygen concentration apparatus comprising: pressure swing adsorption type oxygen concentration means including: at least one adsorption column formed of a cylinder hollow having first and second ports, an inside of said cylinder hollow is filled with an adsorbent selectively adsorbing nitrogen rather than oxygen; pressurized air supply means connected with the first port of said adsorption column and supplying pressurized air to said adsorption column; exhaust means connected with the first port of said adsorption column and allowing exhaust from said adsorption column; and switching means allowing said pressurized air supply means and said exhaust means to communicate with said first port selectively, said pressure swing adsorption type oxygen concentration means generates oxygen concentrated gas by repeating an adsorption process in which said pressurized air supply means supplies pressurized air to said adsorption column to adsorb the nitrogen from said air, and a regeneration process in which said exhaust means depressurizes said adsorption column to separate the nitrogen adsorbed by said adsorption column to regenerate said adsorbent; a conduit communicating at its one end with the second port of said oxygen concentration means and introducing the oxygen concentrated gas generated by said oxygen concentration means from said second port into a user; and flow rate adjusting means provided in said conduit and adjusting a flow rate of the oxygen concentrated gas generated by said oxygen concentration means, said oxygen concentration apparatus further comprises: pressure measuring means disposed between said oxygen concentration means and said flow rate adjusting means in said conduit; and control means controlling at least the switching means of said oxygen concentration means and said flow rate adjusting means, wherein said control means adjusts a cycle of the adsorption and regeneration processes of said oxygen concentration means and controls pressure at the upstream of said flow rate adjusting means by controlling said switching means based on pressure of said oxygen concentrated gas in said conduit measured by said pressure measuring means. 2. An oxygen concentration apparatus according to claim 1, wherein said oxygen concentration means has a multi adsorption columns, and said switching means having a rotary valve allowing each of said multi adsorption columns to communicate with said pressurized air supply means and said exhaust means selectively, said control means controlling the number of revolutions of said rotary valve. 3. An oxygen concentration apparatus according to claim 1, further comprising flow rate setting means for setting a flow rate of the oxygen concentrated gas to be supplied to the user, wherein said control means controls said switching means to adjust a cycle of the adsorption and regeneration processes so that the flow rate of the oxygen concentrated gas set by said flow rate setting means can be obtained. 4. An oxygen concentration apparatus according to claim 3, wherein said control means executes a moving average process of pressure in said conduit measured by said pressure measuring means in terms of time and controls said switching means to adjust the cycle of the adsorption and regeneration processes of the oxygen concentration means so that the pressure after the moving average process is a target pressure value. 5. An oxygen concentration apparatus according to claim 3, wherein said flow rate adjusting means having an on-off valve disposed in said conduit; and respiratory phase detection means disposed downstream of said on-off valve in said conduit and detecting a respiratory phase of the user, wherein said control means calculates a valve opening time of said on-off valve based on the flow rate of the oxygen concentrated gas set by said flow rate setting means and information about a respiratory phase detected by said respiratory phase detection means to open said on-off valve during said valve opening time from a start of an inspiratory phase detected by said respiratory phase detection means. 6. An oxygen concentration apparatus according to claim 3, wherein said flow rate adjusting means further includes a variable orifice having a plurality of orifices of different diameters and disposed in said conduit, wherein said control means selects one orifice of said plurality of orifices so that said oxygen concentrated gas can pass through said variable orifice at a flow rate set by said flow rate setting means. 7. An oxygen concentration apparatus according to claim 3, wherein said flow rate adjusting means includes a proportional valve disposed in said conduit; and flow rate measuring means disposed at the upstream or downstream of said on-off valve in said conduit, wherein said control means controls a degree of opening of said proportional valve so that a measured value by said flow rate measuring means can coincide with a flow rate of the oxygen concentrated gas set by said flow rate setting means. 8. An oxygen concentration apparatus according to claim 5, further comprising oxygen supply method selection means for selecting between a continuous mode to supply the oxygen concentrated gas to the user continuously and a synchronous mode to supply in synchronization with the user's respiration, wherein said flow rate adjusting means further including: a three-way valve disposed upstream of said on-off valve in said conduit; a branched line branched from said conduit via said three-way valve and joining with said conduit at the downstream of said on-off valve; and a variable orifice disposed in said branched line and having a plurality of orifices of different diameters, wherein, when said synchronous mode is selected, said control means shuts off said branched line from said conduit and calculates the valve opening time of said on-off valve based on the flow rate of the oxygen concentrated gas set by said flow rate setting means and the information about the respiratory phase detected by said respiratory phase detection means to open said on-off valve during said valve opening time from the start of the inspiratory phase detected by said respiratory phase detection means, and, when said continuous mode is selected, said control means connects said branched line with said conduit and selects one orifice of said plurality of orifices so that said oxygen concentrated gas can pass through said variable orifice at a flow rate set by said flow rate setting means. 9. An oxygen concentration apparatus according to claim 5, further comprising oxygen supply method selection means for selecting between a continuous mode to supply the oxygen concentrated gas to the user continuously and a synchronous mode to supply the oxygen-concentrated gas in synchronization with the user's respiration, wherein said flow rate measuring means is disposed downstream of said on-off valve in the conduit, and said flow rate adjusting means further including: a three-way valve disposed upstream of said on-off valve in said conduit; a branched line branched from said conduit via said three-way valve and flowing into said conduit at the downstream of said valve and at the upstream of said flow rate measuring means; and a proportional valve disposed in said branched line wherein when said synchronous mode is selected, said control means shuts off said branched line from said conduit and calculates the valve opening time of said on-off valve based on the flow rate of the oxygen concentrated gas set by said flow rate setting means and the information about the respiratory phase detected by said respiratory phase detection means to open said on-off valve during said valve opening time from the start of the inspiratory phase detected by said respiratory phase detection means, when said continuous mode is selected, said control means connects said branched line with said conduit and controls a degree of opening of said proportional valve so that a measured value by said flow rate measuring means can coincide with a flow rate of the oxygen concentrated gas set by said flow rate setting means. 10. An oxygen concentration apparatus according to claim 5, further comprising oxygen supply method selection means for selecting between a continuous mode to supply the oxygen concentrated gas to the user continuously and a synchronous mode to supply the oxygen-concentrated gas in synchronization with the user's respiration, and wherein said flow rate adjusting means further including: a proportional valve disposed in said conduit; and respiratory phase detection means disposed downstream of said proportional valve in said conduit and detecting a respiratory phase of the user, wherein when said synchronous mode is selected, said control means calculates the valve opening time of said on-off valve based on the flow rate of the oxygen concentrated gas set by said flow rate setting means and the information about the respiratory phase detected by said respiratory phase detection means to open said on-off valve during said valve opening time from the start of the inspiratory phase detected by said respiratory phase detection means, and, when said continuous mode is selected, said control means controls a degree of opening of said proportional valve so that a value measured by said flow rate measuring means can coincide with a flow rate of the oxygen concentrated gas set by said flow rate setting means. 11. An oxygen concentration apparatus according to claim 1, further comprising oxygen concentration measuring means disposed at the upstream or downstream of said flow rate adjusting means in said conduit, wherein said control means controls said pressurized air supply means so that an oxygen concentration measured by said oxygen concentration measuring means can be a desired oxygen concentration. 12. An oxygen concentration apparatus according to claim 11, wherein said oxygen concentration measuring means includes an ultrasonic type gas concentration and flow rate measuring apparatus having: a test line that extending linearly; and two ultrasonic transducers disposed in an opposed manner in said test line, said ultrasonic type gas concentration and flow rate measuring apparatus measuring an oxygen concentration and a flow rate of the oxygen concentrated gas by ultrasonic waves, wherein an oxygen concentration is measured while the oxygen concentrated gas is immobile in said test line. 13. An oxygen concentration apparatus according to claim 12, wherein it is determined that the oxygen concentrated gas is immobile based on a flow rate measured by said ultrasonic type gas concentration and flow rate measuring apparatus. 14. An oxygen concentration apparatus according to claim 5, further comprising ultrasonic type gas concentration and flow rate measuring means having two ultrasonic transducers disposed in an opposed manner in the line through which the product gas flows, wherein a concentration value measured when said product gas output is stopped is determined to be a product gas concentration. 15. An oxygen concentrating apparatus according to claim 14, wherein it is determined that the product gas output is stopped based on a flow rate output value measured by the ultrasonic-type gas-concentration and flow rate measuring apparatus itself. 16. An oxygen concentrating apparatus according to claim 14, wherein it is determined that the product gas output is stopped based on information from the means for controlling the start and stop of the output of the product gas. 17. An oxygen concentration apparatus according to claim 14, wherein said ultrasonic type gas concentration and flow rate measuring means is disposed upstream of said product gas flow path on-off valve.
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