CN102366647A - CPAP (Continuous Positive Airway Pressure) oxygen supplying instrument with double oxygen sources - Google Patents
CPAP (Continuous Positive Airway Pressure) oxygen supplying instrument with double oxygen sources Download PDFInfo
- Publication number
- CN102366647A CN102366647A CN2011103335963A CN201110333596A CN102366647A CN 102366647 A CN102366647 A CN 102366647A CN 2011103335963 A CN2011103335963 A CN 2011103335963A CN 201110333596 A CN201110333596 A CN 201110333596A CN 102366647 A CN102366647 A CN 102366647A
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- oxygen
- valve
- air
- cpap
- supply
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- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 98
- 239000001301 oxygen Substances 0.000 title claims abstract description 98
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 98
- 230000029058 respiratory gaseous exchange Effects 0.000 claims abstract description 13
- 239000007789 gas Substances 0.000 claims description 47
- 230000009977 dual effect Effects 0.000 claims description 18
- 238000012544 monitoring process Methods 0.000 claims description 14
- 239000002808 molecular sieve Substances 0.000 claims description 8
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 238000012423 maintenance Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 239000003595 mist Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000036772 blood pressure Effects 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000013022 venting Methods 0.000 description 2
- 206010020852 Hypertonia Diseases 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 208000007502 anemia Diseases 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 206010025482 malaise Diseases 0.000 description 1
- 210000004877 mucosa Anatomy 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Respiratory Apparatuses And Protective Means (AREA)
- Separation Of Gases By Adsorption (AREA)
Abstract
The invention discloses a CPAP (Continuous Positive Airway Pressure) oxygen supplying instrument with double oxygen sources. An oil-free air compressor (3), an air/oxygen separated parallel flow path, a reducing valve (14), a throttle valve (15), a one-way valve (18) and a breathing mask (22) are connected in series and in a proper sequence through an air pipeline. A pressure sensor (21) is connected in parallel between the one-way valve (18) and the breathing mask (22). The oxygen supplying instrument is unnecessary to be provided with an extra air compressor and an oxygen bottle or supply the oxygen collectively. The CPAP oxygen supplying instrument with the double air sources, disclosed by the invention, has the advantages of small volume, low cost, convenience for use and maintenance, low noise, little heat emission, reduced failure rate and long service life.
Description
Technical field
The present invention relates to a kind of oxygen supply equipment, particularly relate to a kind of CPAP oxygen supply appearance with two kinds of sources of the gas.
Background technology
On clinical medicine, give the I that autonomous respiration is arranged at present; The II type is exhaled the patient that declines, and especially anemia of pregnant woman, premature infant, neonate, infant do not carry any source of the gas until the CPAP oxygen supply appearance (respirator) that the child below 14 years old uses; During use; CPAP oxygen supply appearance is through after mixing oxygen and air by a certain percentage, through decompression, current limliting, filtration, humidification, by patient's needs positive pressure gas is provided.
Yet; Independent oxygen supply appearance can't be worked, and air source and source of oxygen all are optional equipments, concentrates air etc. to provide such as air source by air compressor or center; Source of oxygen is provided by oxygen cylinder or center concentrated oxygen supply etc., moves, uses, safeguards all comparatively inconvenience.Brought very big obstruction for patient's treatment.
The more important thing is, in developing country, some remote and underdeveloped county and township hospitals, equipment and condition are limited, can't use the central gas supply at center at all.Unique selection just is to use air compressor and oxygen cylinder.
Yet the source of the gas output pressure of the optional equipment that uses at present is all very high, generally about 400kPa.Therefore, above-mentioned air compressor causes caloric value big because of continuous operation under the situation of high load capacity, and simultaneously noise is also relatively large during continuous firing.Because machine sound insulation noise reduction heavily measures, affect heat radiation to a great extent, so the compressor pump core works under hot environment, overtemperature protection occurs easily and shut down, service life of a machine is short simultaneously, has a strong impact on medical institutions and cures the sickness to save the patient.
Correspondingly, because a lot of remote county and township hospital does not have the condition of concentrated oxygen supply, source of oxygen just can only be used the oxygen cylinder supply.But this needs often to change, and oxygen cylinder itself is heavy, moves and use all very inconvenience.And the gas station of changing oxygen also needs a series of strictnesses and expensive auxiliary facility.
Simultaneously, even adopt the method for air compressor and oxygen cylinder to solve, also will face bulky and waste ward space and the high relatively cost of cost.Therefore make using and develop and having received very big obstruction of this type oxygen supply appearance.
Summary of the invention
The objective of the invention is to overcome defective of the prior art, as long as a kind of CPAP oxygen supply appearance that the electric band dual gas supply that just can work is arranged is provided.
The CPAP oxygen supply appearance of band dual gas supply of the present invention; Comprise: oil-free air compressor, air/oxygen through gas piping is connected in series are successively separated parallelly connected stream, air relief valve, choke valve, check valve and breathing mask, between said check valve and said breathing mask and be connected to a pressure transducer; Wherein air/oxygen is separated parallelly connected stream and is comprised pressure regulator valve branch road parallel with one another and product oxygen branch road; Wherein produce the oxygen branch road and comprise one or two position and four-way reversing valve and two molecular sieve adsorbers that link to each other respectively with two of the offsides of this two position and four-way reversing valve; Said two molecular sieve adsorbers are parallel with one another and be connected in series successively with oxygen catcher and oxygen pressure regulator valve jointly; Said pressure regulator valve branch road has converged at oxygen mixed proportion adjustable valve with product oxygen branch road, and this sky oxygen mixed proportion adjustable valve is connected in series with said air relief valve.
The CPAP oxygen supply appearance of band dual gas supply of the present invention wherein is serially connected with effusion meter on the gas piping between said choke valve and the said check valve, between said effusion meter and said check valve and be connected to oxygen concentration monitoring meter.
The CPAP oxygen supply appearance of band dual gas supply of the present invention, wherein said said effusion meter, oxygen concentration monitoring meter and pressure transducer all show with a monitoring and control device links to each other.
The CPAP oxygen supply appearance of band dual gas supply of the present invention; Wherein be serially connected with air filter and air drier successively on the gas piping before said oil-free air compressor; On the gas piping behind the said oil-free air compressor, be serially connected with air cooler and water trap successively, on the gas piping between said check valve and the said breathing mask, be serially connected with air filter and air humidifier.
The CPAP oxygen supply appearance of band dual gas supply of the present invention, the idle port of giving vent to anger of wherein said two position and four-way reversing valves links to each other with a deafener.
The CPAP oxygen supply appearance of band dual gas supply of the present invention need not optional equipment air compressor and oxygen cylinder or central gas supply again, and volume is little, and cost is low, use, easy to maintenance; Noise is little, heating is few, and fault rate reduces, long service life.
Description of drawings
Below will combine accompanying drawing that the embodiment of the CPAP oxygen supply appearance of band dual gas supply of the present invention is described in further detail, wherein:
Fig. 1 is the sketch map of CPAP oxygen supply appearance one embodiment of band dual gas supply of the present invention.
The specific embodiment
With reference to figure 1, Fig. 1 is the sketch map of CPAP oxygen supply appearance one embodiment of band dual gas supply of the present invention.
As shown in Figure 1; The CPAP oxygen supply appearance of band dual gas supply of the present invention comprises: oil-free air compressor 3, air/oxygen through gas piping is connected in series are successively separated parallelly connected stream, air relief valve 14, choke valve 15, check valve 18 and breathing mask 22, between said check valve 18 and said breathing mask 22 and be connected to a pressure transducer 21.
Air/oxygen is separated parallelly connected stream and is comprised pressure regulator valve parallel with one another 6 branch roads and produce the oxygen branch road; Wherein said product oxygen branch road comprises one or two position and four-way reversing valve 8 and two molecular sieve adsorbers 9 that link to each other respectively with two of the offsides of this two position and four-way reversing valve 8; 10, the idle port of giving vent to anger of this two position and four-way reversing valve 8 links to each other with a deafener 7.This two molecular sieve adsorber 9; 10 is parallel with one another and common be connected in series successively with oxygen catcher 11 and oxygen pressure regulator valve 12; Said pressure regulator valve 6 branch roads have converged at oxygen mixed proportion adjustable valve 13 with product oxygen branch road, and this sky oxygen mixed proportion adjustable valve 13 is connected in series with said air relief valve 14.
On the gas piping between said choke valve 15 and the said check valve 18, be serially connected with effusion meter 16, between said effusion meter 16 and said check valve 18 and be connected to oxygen concentration monitoring meter 17.Said effusion meter 16, oxygen concentration monitoring meter 17 and pressure transducer 21 all show with a monitoring and control device 23 links to each other.
Be serially connected with air filter 2 and air drier 1 on the gas piping before oil-free air compressor 3 successively; On the gas piping behind the oil-free air compressor 3, be serially connected with air cooler 4 and water trap 5 successively, on the gas piping between check valve 18 and the breathing mask 22, be serially connected with air filter 19 and air humidifier 20.
The work process of the CPAP oxygen supply appearance of band dual gas supply of the present invention is following:
At first oil-free air compressor pump 3 energising work, extraneous air filters impurity such as dust through air drier 1 drying and air filter 2, is sucked by oil-free air compressor pump 3.Oil-free air compressor pump 3 is worked and can be produced heats, thereby the air themperature that is extracted is raise, and cools off through connecting 4 pairs of institutes of air cooler exhaust, and the water trap 5 after the water process that after air cooling, produces is got rid of.
The air of being exported is divided into two-way: the one tunnel directly carries out air to be connected with empty oxygen mixed proportion adjustable valve 13 after the adjust blood pressure through pressure regulator valve 6; Another road alternately gets into molecular sieve adsorber 9 and molecular sieve adsorber 10 selective absorption nitrogen through one or two position and four-way reversing valve 8, isolates oxygen.Oxygen is collected through oxygen catcher 11 after throttling is handled.The oxygen of collecting links to each other with empty oxygen mixed proportion adjustable valve 13 through after pressure regulator valve 12 adjust blood pressure.Regulate the pressure of pressure regulator valve 6 and pressure regulator valve 12 reduction air source and source of oxygen; And the pressure of the pressure of the oxygen of assurance output and delivery air is identical; Regulate oxygen and Air mixing ratio through empty oxygen mixed proportion valve 13 again; Mixed gas reduces pressure through series connection air relief valve 14; Series throttle 15 is carried out throttling, checks the flow velocity of output source of the gas and the needs whether concentration meets patient through effusion meter 16 and oxygen concentration monitoring meter 17 by monitoring display control unit 23, and this source of the gas is filtered out the dust impurity that possibly be mingled with in the pilot process through series connection check valve 18, air filter 19; Give the gas humidification of output through air humidifier 20; Prevent that too exsiccant gas from bringing injury to the patient's breath mucosa, check through pressure transducer 21 whether the pressure of output satisfies user's requirement again, link to each other with breathing mask 22 at last.
In this section gas circuit, access flow meter 16, oxygen concentration monitoring meter 17, monitoring stream is through patient's mixed gas flow and concentration respectively.The check valve 18 that inserts can prevent the refluence of humidifying water.The concentration of the mist of output can be regulated through empty oxygen mixed proportion adjustable valve 13, and flow velocity is regulated through choke valve 15, thereby regulates the venting pressure of patient end.Through air humidifier 20 moistening mists; Can monitor in real time the concentration of mist and the venting pressure of patient end respectively through oxygen concentration monitoring meter 17, pressure transducer 21; Deposit data in microprocessor; If hypertonia or low excessively, the oxygen concentration of mist can be reported to the police through this microprocessor.
Adopt and should invent, effectively solved the problem in the necessary outer distribution source of use CPAP oxygen supply appearance (respirator), noise is little; Volume is little, and heating is few, saves the space; Reduce use cost, fault rate is low, long service life; There is electricity to get final product work, greatly widened the scope of application of CPAP oxygen supply appearance (respirator).Patient uses the safety coefficient of oxygen supply appearance (respirator) also to increase, and has brought very big space for the application prospect of CPAP oxygen supply appearance (respirator) and development.
Claims (5)
1. CPAP oxygen supply appearance with dual gas supply is characterized in that comprising:
Oil-free air compressor (3), air/oxygen through gas piping is connected in series are successively separated parallelly connected stream, air relief valve (14), choke valve (15), check valve (18) and breathing mask (22), between said check valve (18) and said breathing mask (22) and be connected to a pressure transducer (21);
Wherein said air/oxygen is separated parallelly connected stream and is comprised pressure regulator valve parallel with one another (6) branch road and produce the oxygen branch road; Wherein said product oxygen branch road comprises one or two position and four-way reversing valve (8) and two molecular sieve adsorbers (9 that link to each other respectively with two of the offsides of this two position and four-way reversing valve (8); 10); Said two molecular sieve adsorbers (9; 10) parallel with one another and be connected in series successively with oxygen catcher (11) and oxygen pressure regulator valve (12) jointly, said pressure regulator valve (6) branch road with produce the oxygen branch road and converged at oxygen mixed proportion adjustable valve (13), this sky oxygen mixed proportion adjustable valve (13) is connected in series with said air relief valve (14).
2. the CPAP oxygen supply appearance of band dual gas supply as claimed in claim 1; It is characterized in that: on the gas piping between said choke valve (15) and the said check valve (18), be serially connected with effusion meter (16), between said effusion meter (16) and said check valve (18) and be connected to oxygen concentration monitoring meter (17).
3. the CPAP oxygen supply appearance of band dual gas supply as claimed in claim 2 is characterized in that: said effusion meter (16), oxygen concentration monitoring meter (17) and said pressure transducer (21) all show with a monitoring and control device (23) links to each other.
4. like the CPAP oxygen supply appearance of any one described band dual gas supply among the claim 1-3; It is characterized in that: on the preceding gas piping of said oil-free air compressor (3), be serially connected with air filter (2) and air drier (1) successively; On the gas piping behind the said oil-free air compressor (3), be serially connected with air cooler (4) and water trap (5) successively, on the gas piping between said check valve (18) and the said breathing mask (22), be serially connected with air filter (19) and air humidifier (20).
5. like the CPAP oxygen supply appearance of any one described band dual gas supply among the claim 1-3, it is characterized in that: the idle port of giving vent to anger of said two position and four-way reversing valves (8) links to each other with a deafener (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110333596.3A CN102366647B (en) | 2011-10-28 | 2011-10-28 | CPAP (Continuous Positive Airway Pressure) oxygen supplying instrument with double oxygen sources |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110333596.3A CN102366647B (en) | 2011-10-28 | 2011-10-28 | CPAP (Continuous Positive Airway Pressure) oxygen supplying instrument with double oxygen sources |
Publications (2)
| Publication Number | Publication Date |
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| CN102366647A true CN102366647A (en) | 2012-03-07 |
| CN102366647B CN102366647B (en) | 2014-02-26 |
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| CN201110333596.3A Expired - Fee Related CN102366647B (en) | 2011-10-28 | 2011-10-28 | CPAP (Continuous Positive Airway Pressure) oxygen supplying instrument with double oxygen sources |
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Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102705204A (en) * | 2012-07-05 | 2012-10-03 | 昆山宝宏机械有限公司 | Oxygen-making and nitrogen-making air compressor |
| CN103055396A (en) * | 2013-01-31 | 2013-04-24 | 北京北辰亚奥科技有限公司 | Air supply device |
| CN104645469A (en) * | 2015-02-04 | 2015-05-27 | 丁本增 | Noninvasive breathing apparatus |
| CN105363105A (en) * | 2014-08-15 | 2016-03-02 | 深圳市安保科技有限公司 | Pneumatic electrically-controlled ventilation system and ventilation method thereof |
| CN105664319A (en) * | 2016-03-18 | 2016-06-15 | 沈阳迈思医疗科技有限公司 | Control method and control device of oxygen production and assisted respiration integration |
| CN105920787A (en) * | 2016-06-08 | 2016-09-07 | 深圳市好家庭体育用品连锁经营有限公司 | Fitness equipment and oxygen generating system thereof |
| CN105963910A (en) * | 2016-06-08 | 2016-09-28 | 深圳市好家庭体育用品连锁经营有限公司 | Running machine with oxygen generating function |
| CN106063984A (en) * | 2016-07-21 | 2016-11-02 | 深圳市好家庭体育用品连锁经营有限公司 | Body-building apparatus and oxygen atomization system processed thereof |
| CN106075809A (en) * | 2016-06-08 | 2016-11-09 | 深圳市好家庭体育用品连锁经营有限公司 | A kind of body-building apparatus and oxygen generation system thereof |
| CN106139518A (en) * | 2016-07-21 | 2016-11-23 | 深圳市好家庭体育用品连锁经营有限公司 | A kind of treadmill with oxygen atomizing functions processed |
| CN106178398A (en) * | 2016-07-21 | 2016-12-07 | 深圳市好家庭体育用品连锁经营有限公司 | A kind of body-building apparatus and oxygen atomization system processed thereof |
| CN106267481A (en) * | 2016-07-21 | 2017-01-04 | 深圳市好家庭体育用品连锁经营有限公司 | Body-building apparatus and oxygen atomization system processed thereof |
| CN106267507A (en) * | 2016-07-18 | 2017-01-04 | 合肥美菱净化设备有限公司 | A kind of medical oxygen generator of remote wireless monitoring |
| CN107376089A (en) * | 2017-07-31 | 2017-11-24 | 河南亚都实业有限公司 | A kind of oxygen concentration adjustable oxygen mask |
| WO2018014296A1 (en) * | 2016-07-21 | 2018-01-25 | 深圳市好家庭体育用品连锁经营有限公司 | Fitness machine, and oxygen generating and vaporizing system thereof |
| WO2018014288A1 (en) * | 2016-07-21 | 2018-01-25 | 深圳市好家庭体育用品连锁经营有限公司 | Fitness machine, and oxygen generating and vaporizing system thereof |
| WO2018014287A1 (en) * | 2016-07-21 | 2018-01-25 | 深圳市好家庭体育用品连锁经营有限公司 | Exercise treadmill with oxygen generating and vaporizing functions |
| WO2018014292A1 (en) * | 2016-07-21 | 2018-01-25 | 深圳市好家庭体育用品连锁经营有限公司 | Fitness machine, and oxygen generating and vaporizing system thereof |
| CN113521457A (en) * | 2016-01-21 | 2021-10-22 | 呼吸科技公司 | Modular ventilation system |
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Cited By (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102705204A (en) * | 2012-07-05 | 2012-10-03 | 昆山宝宏机械有限公司 | Oxygen-making and nitrogen-making air compressor |
| CN103055396A (en) * | 2013-01-31 | 2013-04-24 | 北京北辰亚奥科技有限公司 | Air supply device |
| CN103055396B (en) * | 2013-01-31 | 2015-09-23 | 北京北辰亚奥科技有限公司 | A kind of feeder |
| CN105363105A (en) * | 2014-08-15 | 2016-03-02 | 深圳市安保科技有限公司 | Pneumatic electrically-controlled ventilation system and ventilation method thereof |
| CN105363105B (en) * | 2014-08-15 | 2017-09-05 | 深圳市安保科技有限公司 | A kind of Pneumatic electrical control aerating system and its vent method |
| CN104645469A (en) * | 2015-02-04 | 2015-05-27 | 丁本增 | Noninvasive breathing apparatus |
| CN113521457A (en) * | 2016-01-21 | 2021-10-22 | 呼吸科技公司 | Modular ventilation system |
| CN105664319A (en) * | 2016-03-18 | 2016-06-15 | 沈阳迈思医疗科技有限公司 | Control method and control device of oxygen production and assisted respiration integration |
| CN105920787A (en) * | 2016-06-08 | 2016-09-07 | 深圳市好家庭体育用品连锁经营有限公司 | Fitness equipment and oxygen generating system thereof |
| CN105963910A (en) * | 2016-06-08 | 2016-09-28 | 深圳市好家庭体育用品连锁经营有限公司 | Running machine with oxygen generating function |
| CN106075809A (en) * | 2016-06-08 | 2016-11-09 | 深圳市好家庭体育用品连锁经营有限公司 | A kind of body-building apparatus and oxygen generation system thereof |
| CN106267507A (en) * | 2016-07-18 | 2017-01-04 | 合肥美菱净化设备有限公司 | A kind of medical oxygen generator of remote wireless monitoring |
| CN106139518A (en) * | 2016-07-21 | 2016-11-23 | 深圳市好家庭体育用品连锁经营有限公司 | A kind of treadmill with oxygen atomizing functions processed |
| CN106267481A (en) * | 2016-07-21 | 2017-01-04 | 深圳市好家庭体育用品连锁经营有限公司 | Body-building apparatus and oxygen atomization system processed thereof |
| CN106178398A (en) * | 2016-07-21 | 2016-12-07 | 深圳市好家庭体育用品连锁经营有限公司 | A kind of body-building apparatus and oxygen atomization system processed thereof |
| WO2018014296A1 (en) * | 2016-07-21 | 2018-01-25 | 深圳市好家庭体育用品连锁经营有限公司 | Fitness machine, and oxygen generating and vaporizing system thereof |
| WO2018014288A1 (en) * | 2016-07-21 | 2018-01-25 | 深圳市好家庭体育用品连锁经营有限公司 | Fitness machine, and oxygen generating and vaporizing system thereof |
| WO2018014287A1 (en) * | 2016-07-21 | 2018-01-25 | 深圳市好家庭体育用品连锁经营有限公司 | Exercise treadmill with oxygen generating and vaporizing functions |
| WO2018014292A1 (en) * | 2016-07-21 | 2018-01-25 | 深圳市好家庭体育用品连锁经营有限公司 | Fitness machine, and oxygen generating and vaporizing system thereof |
| CN106063984A (en) * | 2016-07-21 | 2016-11-02 | 深圳市好家庭体育用品连锁经营有限公司 | Body-building apparatus and oxygen atomization system processed thereof |
| CN107376089A (en) * | 2017-07-31 | 2017-11-24 | 河南亚都实业有限公司 | A kind of oxygen concentration adjustable oxygen mask |
| CN107376089B (en) * | 2017-07-31 | 2018-06-26 | 河南亚都实业有限公司 | A kind of oxygen concentration adjustable oxygen mask |
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| CN102366647B (en) | 2014-02-26 |
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