CN108190841A - A kind of Domestic oxygen erator - Google Patents

A kind of Domestic oxygen erator Download PDF

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Publication number
CN108190841A
CN108190841A CN201810150408.5A CN201810150408A CN108190841A CN 108190841 A CN108190841 A CN 108190841A CN 201810150408 A CN201810150408 A CN 201810150408A CN 108190841 A CN108190841 A CN 108190841A
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CN
China
Prior art keywords
filter
adsorption tower
oxygen
solenoid valve
air inlet
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201810150408.5A
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Chinese (zh)
Inventor
雷体桥
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GUANGZHOU HUILIN AIR SEPARATION EQUIPMENT Co Ltd
Original Assignee
GUANGZHOU HUILIN AIR SEPARATION EQUIPMENT Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by GUANGZHOU HUILIN AIR SEPARATION EQUIPMENT Co Ltd filed Critical GUANGZHOU HUILIN AIR SEPARATION EQUIPMENT Co Ltd
Priority to CN201810150408.5A priority Critical patent/CN108190841A/en
Publication of CN108190841A publication Critical patent/CN108190841A/en
Pending legal-status Critical Current

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    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B13/00Oxygen; Ozone; Oxides or hydroxides in general
    • C01B13/02Preparation of oxygen
    • C01B13/0229Purification or separation processes
    • C01B13/0248Physical processing only
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/02Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/26Drying gases or vapours
    • B01D53/265Drying gases or vapours by refrigeration (condensation)
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B13/00Oxygen; Ozone; Oxides or hydroxides in general
    • C01B13/02Preparation of oxygen
    • C01B13/0229Purification or separation processes
    • C01B13/0248Physical processing only
    • C01B13/0259Physical processing only by adsorption on solids
    • C01B13/0262Physical processing only by adsorption on solids characterised by the adsorbent
    • C01B13/0266Carbon based materials
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B2210/00Purification or separation of specific gases
    • C01B2210/0001Separation or purification processing
    • C01B2210/0009Physical processing
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B2210/00Purification or separation of specific gases
    • C01B2210/0001Separation or purification processing
    • C01B2210/0009Physical processing
    • C01B2210/0014Physical processing by adsorption in solids
    • C01B2210/0015Physical processing by adsorption in solids characterised by the adsorbent
    • C01B2210/0017Carbon-based materials

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  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Inorganic Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Materials Engineering (AREA)
  • Drying Of Gases (AREA)

Abstract

The present invention relates to oxygenerator fields, and in particular to a kind of Domestic oxygen erator, including:Air compressor machine, moisture trap, grade one filter, electronic cold lyophilizer, secondary filter, tertiary filter, charcoal filter, the first solenoid valve, the first adsorption tower, the second adsorption tower, second solenoid valve, oxygen surge tank and oxygen storage tank;The present invention is when to compressed air purifying by the way that traditional refrigerant type drying machine is replaced with electronic cold lyophilizer, reduce the volume of drying machine, multistage filter is integrally molded to injection simultaneously, the required space of filter attachment portion is saved, then also reduce the volume of Domestic oxygen erator;With the characteristics of small, drying removes water, dedusting is thorough.

Description

A kind of Domestic oxygen erator
Technical field
The present invention relates to oxygenerator fields, and in particular to a kind of Domestic oxygen erator.
Background technology
If Domestic oxygen erator will be used for a long time, it is necessary to have freezing type drier and filter water removal, dedusting, just can guarantee Air cleaning does not cause oxygen molecular sieve processed to be polluted and failed by impurity such as water and dusts.But since Domestic oxygen erator is small, And general refrigerant type freeze drier volume is bigger, it is impossible to mating to Domestic oxygen erator;What filter (2-5 grades) volume Also it is bigger, thus cause the air source of present Domestic oxygen erator can not thoroughly remove water, dedusting, compressed air is not clean enough Only, and then cause Domestic oxygen erator service life short.
Invention content
In view of this, in order to solve the problems in the prior art, the present invention proposes a kind of Domestic oxygen erator.
The present invention is solved the above problems by following technological means:
A kind of Domestic oxygen erator, including:Air compressor machine, moisture trap, multistage filter, electronic cold lyophilizer, work Property carbon filter, the first solenoid valve, the first adsorption tower, the second adsorption tower, second solenoid valve, oxygen surge tank and oxygen storage tank; Compressed air is passed sequentially through the moisture trap, the grade one filter, the electronic type by wherein described air compressor machine Adsorption treatment is dried in freeze drier, the secondary filter, the tertiary filter and the charcoal filter;Institute First station of the air inlet respectively with first solenoid valve of air inlet and second adsorption tower for stating the first adsorption tower goes out Gas port, second station gas outlet are connected, the gas outlet of the gas outlet of first adsorption tower and second adsorption tower respectively with The first station air inlet, the second station air inlet of the second solenoid valve are connected;
By the compressed air after dry decontamination by the air inlet of first solenoid valve and then by the described first absorption After the absorption of tower or second adsorption tower, the oxygen of generation passes through the oxygen by the gas outlet of the second solenoid valve again Gas surge tank carries out buffered, enters finally into and is stored in the oxygen storage tank.
In detail, the electronic cold lyophilizer specifically uses conductor refrigeration mode.
In detail, the moisture trap, the multistage filter and the charcoal filter are molded for whole die sinking It forms.
The present invention is freeze-dried when to compressed air purifying by the way that traditional refrigerant type drying machine is replaced with electronic type Machine reduces the volume of drying machine, while multistage filter is integrally molded to injection, required for having saved filter attachment portion Space, then also reduce the volume of Domestic oxygen erator;With the characteristics of small, drying removes water, dedusting is thorough.Significantly Extend the service life of Domestic oxygen erator.
Description of the drawings
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment Attached drawing is briefly described, it should be apparent that, the accompanying drawings in the following description is only some embodiments of the present invention, for For those of ordinary skill in the art, without creative efforts, other are can also be obtained according to these attached drawings Attached drawing.
Fig. 1 is the process flow diagram of the present invention;
Fig. 2 is the structure diagram of multistage filter integral molded plastic in the present invention.
Reference sign:
1st, air compressor machine;2nd, moisture trap;3rd, grade one filter;4th, electronic cold lyophilizer;5th, secondary filter;6、 Tertiary filter;7th, charcoal filter;8th, the first adsorption tower;9th, the second adsorption tower;10th, second solenoid valve;11st, the first electromagnetism Valve;12nd, oxygen surge tank;13rd, oxygen storage tank.
Specific embodiment
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, below in conjunction with attached drawing and specifically Embodiment technical scheme of the present invention is described in detail.It should be pointed out that described embodiment is only this hair Bright part of the embodiment, instead of all the embodiments, based on the embodiments of the present invention, those of ordinary skill in the art are not having All other embodiments obtained under the premise of creative work are made, shall fall within the protection scope of the present invention.
It is to be appreciated that the orientation or position relationship of the instructions such as term " top ", " bottom " are based on shown in the drawings Orientation or position relationship, be for only for ease of the description present invention and simplify description rather than instruction or imply signified device or Element must have specific orientation, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.
Term " first ", " second ", " third " are only used for description purpose, and it is not intended that indicating or implying relatively important Property or the implicit quantity for indicating indicated technical characteristic.Define as a result, " first ", " second ", " third " feature can To express or implicitly include one or more this feature.In the description of the present invention, unless otherwise indicated, " one group " It is meant that two or more.
Embodiment one
As shown in Figure 1 and Figure 2, a kind of Domestic oxygen erator, including:Air compressor machine 1, moisture trap 2, grade one filter 3, electricity Minor freeze drier 4, secondary filter 5, tertiary filter 6, charcoal filter 7, the first electronic valve 11, the first adsorption tower 8th, the second adsorption tower 9, second solenoid valve 10, oxygen surge tank 12 and oxygen storage tank 13;Wherein described air compressor machine 1 will be compressed Air passes sequentially through the moisture trap 2, the grade one filter 3, the electronic cold lyophilizer 4, the two level mistake Adsorption treatment is dried in filter 5, the tertiary filter 6 and the charcoal filter 7;First adsorption tower 8 into The air inlet of gas port and second adsorption tower 9 respectively with the first station gas outlet of first electronic valve 11, second station Gas outlet is connected, the gas outlet of the gas outlet of first adsorption tower 8 and second adsorption tower 9 respectively with second electromagnetism The first station air inlet, the second station air inlet of valve 10 are connected;
It is inhaled by the compressed air after dry decontamination by the air inlet of first electronic valve 11 and then by described first After the absorption of attached tower 8 or second adsorption tower 9, the oxygen of generation is passed through again by the gas outlet of the second solenoid valve 10 The oxygen surge tank 12 carries out buffered, enters finally into and is stored in the oxygen storage tank.
In detail, the electronic cold lyophilizer 4 specifically uses conductor refrigeration mode;In the prior art, generally That water removal drying is carried out to compressed air using refrigerant type freeze drier, it is well known that refrigerant type freeze drier mainly by The components such as refrigeration compressor, condenser, evaporator form, and refrigeration compressor, condenser, evaporator need to occupy a large amount of work Make space, there is volume it is excessive the shortcomings that;And electronic cold lyophilizer 4 of the present invention uses semiconductor cooler Refrigeration, does not need to compressor or other power plants, does not need to any refrigerant, can continuous work, no pollution sources do not have Rotary part, will not generate gyroscopic action, and no slide unit is a kind of solid sheet, and when work does not have vibrations, noise, service life Long, installation is easy;The present invention reduces the volume of Domestic oxygen erator, facilitates family by using electronic cold lyophilizer It uses.
In detail, the moisture trap 2, the grade one filter 3, the secondary filter 5, the tertiary filter 6 and the charcoal filter 7 be molded for whole die sinking;In the prior art, frequently with connector between multistage filter It is attached, and the use of connector increases the spacing between filter, so as to increase the volume of equipment, occupies preciousness Space;The present invention eliminates the connector between filter, so as to reduce filtering by the way that multiple filters are integrally molded injection Spacing between device reduces the volume of equipment, saves valuable space, has further facilitated user and used at home.
The present invention is freeze-dried when to compressed air purifying by the way that traditional refrigerant type drying machine is replaced with electronic type Machine reduces the volume of drying machine, while multistage filter is integrally molded to injection, required for having saved filter attachment portion Space, then also reduce the volume of Domestic oxygen erator;With the characteristics of small, drying removes water, dedusting is thorough.
Embodiment two
As shown in Figure 1 and Figure 2, a kind of Domestic oxygen erator, including:Air compressor machine 1, moisture trap 2, grade one filter 3, electricity Minor freeze drier 4, secondary filter 5, charcoal filter 7, the first electronic valve 11, the first adsorption tower 8, the second adsorption tower 9th, second solenoid valve 10, oxygen surge tank 12 and oxygen storage tank 13;Wherein described air compressor machine 1 passes sequentially through compressed air The moisture trap 2, the grade one filter 3, the electronic cold lyophilizer 4, the secondary filter 5, described three Adsorption treatment is dried in grade filter 6 and the charcoal filter 7;The air inlet of first adsorption tower 8 and described The air inlet of two adsorption towers 9 is connected respectively with the first station gas outlet, the second station gas outlet of first electronic valve 11, institute State the gas outlet of the first adsorption tower 8 and gas outlet the first work with the second solenoid valve 10 respectively of second adsorption tower 9 Position air inlet, second station air inlet are connected;
First adsorption tower 8 by the air inlet of first electronic valve 11 and then is passed through by the air after dry decontamination Or after the absorption of second adsorption tower 9, the oxygen of generation is passed through described by the gas outlet of the second solenoid valve 10 again Oxygen surge tank 12 carries out buffered, enters finally into and is stored in the oxygen storage tank.
In detail, the electronic cold lyophilizer 4 specifically uses conductor refrigeration mode;In the prior art, generally That water removal drying is carried out to compressed air using refrigerant type freeze drier, it is well known that refrigerant type freeze drier mainly by The components such as refrigeration compressor, condenser, evaporator form, and refrigeration compressor, condenser, evaporator need to occupy a large amount of work Make space, there is volume it is excessive the shortcomings that;And electronic cold lyophilizer 4 of the present invention uses semiconductor cooler Refrigeration, does not need to compressor or other power plants, does not need to any refrigerant, can continuous work, no pollution sources do not have Rotary part, will not generate gyroscopic action, and no slide unit is a kind of solid sheet, and when work does not have vibrations, noise, service life Long, installation is easy;The present invention reduces the volume of Domestic oxygen erator, facilitates family by using electronic cold lyophilizer It uses.
In detail, the moisture trap 2, the grade one filter 3, the secondary filter 5 and the activated carbon mistake Filter 7 is molded for whole die sinking;In the prior art, it is attached between multistage filter frequently with connector, and connector Use increase spacing between filter, so as to increase the volume of equipment, occupy valuable space;The present invention passes through Multiple filters are integrally molded into injection, eliminate the connector between filter, so as to reduce the spacing between filter, are subtracted The small volume of equipment saves valuable space, has further facilitated user and used at home.
The present invention is freeze-dried when to compressed air purifying by the way that traditional refrigerant type drying machine is replaced with electronic type Machine reduces the volume of drying machine, while multistage filter is integrally molded to injection, required for having saved filter attachment portion Space, then also reduce the volume of Domestic oxygen erator;With the characteristics of small, drying removes water, dedusting is thorough.
Embodiment three
As shown in Figure 1 and Figure 2, a kind of Domestic oxygen erator, including:Air compressor machine 1, moisture trap 2, grade one filter 3, electricity Minor freeze drier 4, charcoal filter 7, the first electronic valve 11, the first adsorption tower 8, the second adsorption tower 9, second solenoid valve 10th, oxygen surge tank 12 and oxygen storage tank 13;Compressed air is passed sequentially through the gas-water separation by wherein described air compressor machine 1 Device 2, the grade one filter 3, the electronic cold lyophilizer 4, the secondary filter 5, the tertiary filter 6 and institute It states charcoal filter 7 and adsorption treatment is dried;The air inlet of first adsorption tower 8 and second adsorption tower 9 into Gas port is connected respectively with the first station gas outlet, the second station gas outlet of first electronic valve 11, first adsorption tower 8 Gas outlet and second adsorption tower 9 gas outlet respectively with the first station air inlet of the second solenoid valve 10, second Station air inlet is connected;
First adsorption tower 8 by the air inlet of first electronic valve 11 and then is passed through by the air after dry decontamination Or after the absorption of second adsorption tower 9, the oxygen of generation is passed through described by the gas outlet of the second solenoid valve 10 again Oxygen surge tank 12 carries out buffered, enters finally into and is stored in the oxygen storage tank.
In detail, the electronic cold lyophilizer 4 specifically uses conductor refrigeration mode;In the prior art, generally That water removal drying is carried out to compressed air using refrigerant type freeze drier, it is well known that refrigerant type freeze drier mainly by The components such as refrigeration compressor, condenser, evaporator form, and refrigeration compressor, condenser, evaporator need to occupy a large amount of work Make space, there is volume it is excessive the shortcomings that;And electronic cold lyophilizer 4 of the present invention uses semiconductor cooler Refrigeration, does not need to compressor or other power plants, does not need to any refrigerant, can continuous work, no pollution sources do not have Rotary part, will not generate gyroscopic action, and no slide unit is a kind of solid sheet, and when work does not have vibrations, noise, service life Long, installation is easy;The present invention reduces the volume of Domestic oxygen erator, facilitates family by using electronic cold lyophilizer It uses.
In detail, the moisture trap 2, the grade one filter 3 and the charcoal filter 7 are noted for whole die sinking It moulds;In the prior art, it is attached between multistage filter frequently with connector, and the use of connector increases filter Between spacing, so as to increase the volume of equipment, occupy valuable space;The present invention is by the way that multiple filters are integrally opened It is molded into moulding, eliminates the connector between filter, so as to reduce the spacing between filter, reduce the volume of equipment, save Valuable space has been saved, user has been further facilitated and has used at home.
The present invention is freeze-dried when to compressed air purifying by the way that traditional refrigerant type drying machine is replaced with electronic type Machine reduces the volume of drying machine, while multistage filter is integrally molded to injection, required for having saved filter attachment portion Space, then also reduce the volume of Domestic oxygen erator;With the characteristics of small, drying removes water, dedusting is thorough.
Embodiment described above only expresses the several embodiments of the present invention, and description is more specific and detailed, but simultaneously Cannot the limitation to the scope of the claims of the present invention therefore be interpreted as.It should be pointed out that for those of ordinary skill in the art For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the guarantor of the present invention Protect range.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.

Claims (3)

1. a kind of Domestic oxygen erator, which is characterized in that including:Air compressor machine, moisture trap, multistage filter, electronic type freezing Drying machine, charcoal filter, the first solenoid valve, the first adsorption tower, the second adsorption tower, second solenoid valve, oxygen surge tank and Oxygen storage tank;Compressed air is passed sequentially through the moisture trap, the grade one filter, institute by wherein described air compressor machine It states electronic cold lyophilizer, the secondary filter, the tertiary filter and the charcoal filter and suction is dried Attached processing;The air inlet of the air inlet of first adsorption tower and second adsorption tower respectively with first solenoid valve One station gas outlet, second station gas outlet are connected, the outlet of the gas outlet of first adsorption tower and second adsorption tower Mouth is connected respectively with the first station air inlet, the second station air inlet of the second solenoid valve;
First adsorption tower or institute by the air inlet of first solenoid valve and then are passed through by the air after dry decontamination After the absorption for stating the second adsorption tower, the oxygen of generation passes through the oxygen surge tank by the gas outlet of the second solenoid valve again Buffered is carried out, enters finally into and is stored in the oxygen storage tank.
2. Domestic oxygen erator according to claim 1, which is characterized in that the electronic cold lyophilizer is specifically using half Conductor cooling mode.
3. according to the Domestic oxygen erator described in claim 1-2 any of which items, which is characterized in that the moisture trap, more The grade filter and the charcoal filter are molded for whole die sinking.
CN201810150408.5A 2018-02-13 2018-02-13 A kind of Domestic oxygen erator Pending CN108190841A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201810150408.5A CN108190841A (en) 2018-02-13 2018-02-13 A kind of Domestic oxygen erator

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Application Number Priority Date Filing Date Title
CN201810150408.5A CN108190841A (en) 2018-02-13 2018-02-13 A kind of Domestic oxygen erator

Publications (1)

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CN108190841A true CN108190841A (en) 2018-06-22

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109224498A (en) * 2018-11-08 2019-01-18 哈尔滨工业大学 The martian atmosphere pressurization collection device and its method of comprehensive freezing and mechanical compression
CN111994877A (en) * 2020-09-18 2020-11-27 闫瑞福 Medical integrated oxygen generation equipment
CN112047304A (en) * 2020-08-17 2020-12-08 黄秉润 Oxygen generating equipment for hospital

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200444480Y1 (en) * 2007-11-08 2009-05-14 이군호 Water purifying device for filter configured structure
CN203658329U (en) * 2013-11-25 2014-06-18 深圳市纽泰克电子有限公司 Human body carbon dioxide value measurement device
CN203829892U (en) * 2014-05-22 2014-09-17 浙江山海机械有限公司 Electronic freezing type compressed air dryer
CN204800934U (en) * 2015-02-16 2015-11-25 南京瑞安电气有限公司 Cylindrical filter production facility
CN106006564A (en) * 2016-06-30 2016-10-12 广州惠临空气分离设备有限公司 Energy-saving type domestic oxygen generator with multi-stage air purification system
CN106593587A (en) * 2016-12-07 2017-04-26 深圳华夏恒泰电子有限公司 Integrated injection molding type urea liquid level sensor
CN208648753U (en) * 2018-02-13 2019-03-26 广州惠临空气分离设备有限公司 A kind of Domestic oxygen erator

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200444480Y1 (en) * 2007-11-08 2009-05-14 이군호 Water purifying device for filter configured structure
CN203658329U (en) * 2013-11-25 2014-06-18 深圳市纽泰克电子有限公司 Human body carbon dioxide value measurement device
CN203829892U (en) * 2014-05-22 2014-09-17 浙江山海机械有限公司 Electronic freezing type compressed air dryer
CN204800934U (en) * 2015-02-16 2015-11-25 南京瑞安电气有限公司 Cylindrical filter production facility
CN106006564A (en) * 2016-06-30 2016-10-12 广州惠临空气分离设备有限公司 Energy-saving type domestic oxygen generator with multi-stage air purification system
CN106593587A (en) * 2016-12-07 2017-04-26 深圳华夏恒泰电子有限公司 Integrated injection molding type urea liquid level sensor
CN208648753U (en) * 2018-02-13 2019-03-26 广州惠临空气分离设备有限公司 A kind of Domestic oxygen erator

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109224498A (en) * 2018-11-08 2019-01-18 哈尔滨工业大学 The martian atmosphere pressurization collection device and its method of comprehensive freezing and mechanical compression
CN112047304A (en) * 2020-08-17 2020-12-08 黄秉润 Oxygen generating equipment for hospital
CN111994877A (en) * 2020-09-18 2020-11-27 闫瑞福 Medical integrated oxygen generation equipment

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