CN105381527B - Automatic oxygen supply apparatus - Google Patents
Automatic oxygen supply apparatus Download PDFInfo
- Publication number
- CN105381527B CN105381527B CN201511017298.8A CN201511017298A CN105381527B CN 105381527 B CN105381527 B CN 105381527B CN 201511017298 A CN201511017298 A CN 201511017298A CN 105381527 B CN105381527 B CN 105381527B
- Authority
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- China
- Prior art keywords
- oxygen
- density value
- current environment
- cabinet body
- control system
- 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.)
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- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 154
- 239000001301 oxygen Substances 0.000 title claims abstract description 154
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 154
- 238000001514 detection method Methods 0.000 claims abstract description 27
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 21
- 239000000843 powder Substances 0.000 claims description 7
- 230000037237 body shape Effects 0.000 claims description 3
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims description 2
- 229910001882 dioxygen Inorganic materials 0.000 claims description 2
- 238000011897 real-time detection Methods 0.000 description 4
- 239000007787 solid Substances 0.000 description 3
- 230000009885 systemic effect Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 206010037660 Pyrexia Diseases 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 230000009189 diving Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006213 oxygenation reaction Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. ventilators; Tracheal tubes
- A61M16/0003—Accessories therefor, e.g. sensors, vibrators, negative pressure
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. ventilators; Tracheal tubes
- A61M16/10—Preparation of respiratory gases or vapours
- A61M16/1005—Preparation of respiratory gases or vapours with O2 features or with parameter measurement
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D11/00—Control of flow ratio
- G05D11/02—Controlling ratio of two or more flows of fluid or fluent material
- G05D11/13—Controlling ratio of two or more flows of fluid or fluent material characterised by the use of electric means
- G05D11/131—Controlling ratio of two or more flows of fluid or fluent material characterised by the use of electric means by measuring the values related to the quantity of the individual components
Landscapes
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Hematology (AREA)
- Emergency Medicine (AREA)
- Pulmonology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Accommodation For Nursing Or Treatment Tables (AREA)
Abstract
A kind of automatic oxygen supply apparatus, including detection system, for detecting current environment oxygen density value；Oxygen generating systems, for generating oxygen and being supplied to current environment；Control system, the current environment oxygen density value for detecting the detection system are compared with preset oxygen density value, control the oxygen generating systems according to the comparison result and open or close.Above-mentioned automatic oxygen supply apparatus, detection by detection system to current environment oxygen concentration, and the work or closing that judgement automatically controls the oxygen generating systems are carried out by control system, the degree of safety under particular surroundings is greatly improved, the generation of major accident is avoided.
Description
Technical field
Present invention invention is related to industrial equipment field, more particularly to automatic oxygen supply apparatus.
Background technique
Apparatus of oxygen supply is widely used in various industries, such as medical oxygenation, diving oxygen cylinder, mine underground engineering etc.,
Oxygen content should be between 18.5%~23.0% in requirements of the national standard urgent danger prevention facility internal environment.It is traditional in the industry at present
Apparatus of oxygen supply there is following some problems: the starting of portion support device needs operator manually opened；After machine is opened,
If not closing manually, oxygen can be exported continuously, cause to waste.
Invention summary of the invention
Based on this, it is necessary to provide the automatic detection current environment oxygen concentration of one kind, be opened automatically according to current oxygen concentration
Open or close the automatic oxygen supply apparatus of oxygen supply.
A kind of automatic oxygen supply apparatus, including
Detection system, for detecting current environment oxygen density value；
Oxygen generating systems, for generating oxygen and being supplied to current environment；
Control system, current environment oxygen density value and preset oxygen concentration for detecting the detection system
Value is compared, and controls the oxygen generating systems according to the comparison result and opens or closes.
Preferably, the oxygen concentration under the detection system real-time detection current environment and the oxygen concentration that will test biography
Give control system；The control system is compared according to the oxygen density value of the oxygen density value and systemic presupposition that receive
Right, when the oxygen density value detected is greater than the preset oxygen density value, the oxygen generating systems do not start；
When the oxygen density value detected is less than the preset oxygen density value, start the oxygen generating systems oxygen supply.
Preferably, the oxygen density value of the systemic presupposition is one, and the oxygen density value of the setting is in certain model
It encloses.
It preferably, further include shell of the shell in cabinet body shape, the shell includes cabinet body, is placed in the cabinet body upper end
Middle plate and the overturning lid for being rotatably installed on the cabinet body top, the cabinet body, middle plate and overturning lid enclose and are set as one
Free up Memory, the oxygen generating systems are installed on the lower section for being located at the middle plate in the cabinet body, the control system, detection
System is installed on outside the cabinet body.
Preferably, the display screen for connecting the control system is installed on the overturning lid and the connection release is empty
Between air-out component with current environment.
Preferably, the oxygen generating systems include:
Pedestal is fixed on the bottom of cabinet bulk；
Guide rail, described guide rail one end are fixed on the pedestal, and the other end is fixed on the middle plate；
Oxygen generator, the oxygen generator are inserted in the guide rail and are electrically connected with the control system.
Preferably, the oxygen generator includes；
Tubular receiving portion, for accommodating solid-state medicinal powder, the tubular receiving portion open at one end is simultaneously located at the release sky
In；
Pedestal, for holding the other end of the tubular receiving portion.
Preferably, the pedestal includes lateral wall, interior protuberance and the use between the lateral wall and the interior protuberance
In the affixed slot for accommodating tubular receiving portion one end.
Preferably, the interior protuberance of the pedestal is equipped with a pair of conductive terminal, and the control system is led by connecting a pair
Circuit on electric terminal makes the resistance wire in the tubular receiving portion generate heat and makes the tubular receiving portion when reaching certain temperature
Interior medicinal powder reacts and generates oxygen.
Preferably, the detection system is oxygen concentration sensor, and the control system is that central processing unit or PLC are controlled
Device.
Above-mentioned automatic oxygen supply apparatus, by the oxygen density value of detection system real-time detection current environment and with default oxygen
Concentration value is compared, and comparison result is controlled to the work or closing of the oxygen generating systems by control system 41, is avoided
The prior art needs to carry out the defect of manual control switch.Especially in underground job environment, oxygen concentration may change comparatively fast,
Manual operation may cause the generation of major accident not in time, and the automatic oxygen supply apparatus of the application can effectively prevent oxygen content prominent
Drop brings the strain time to operating personnel.
Detailed description of the invention
Fig. 1 is the three-dimensional combination figure of the application automatic oxygen supply apparatus；
Fig. 2 is the part disassembly diagram of the application automatic oxygen supply apparatus；
Fig. 3 is the cross section view of the application automatic oxygen supply apparatus；
Fig. 4 is the perspective view of the air outlet hinge of the application automatic oxygen supply apparatus；
Fig. 5 is the stereogram exploded view of the air outlet hinge of the application automatic oxygen supply apparatus；
Fig. 6 is the constitutional diagram of the solid-state oxygen generator of the application automatic oxygen supply apparatus；
Fig. 7 is the exploded view of the solid-state oxygen generator of the application automatic oxygen supply apparatus；
Fig. 8 is the pedestal exploded view of the solid-state oxygen generator of the application automatic oxygen supply apparatus.
Specific embodiment
To keep the above objects, features, and advantages of the invention invented more obvious and easy to understand, with reference to the accompanying drawing to this
The specific embodiment of invention invention is described in detail.Many details are explained in the following description in order to abundant
Understand present invention invention.But invention of the present invention can be implemented with being much different from other way described herein, this field
Technical staff can do similar improvement without prejudice to invention intension of the present invention, therefore invention of the present invention is not by following public affairs
The limitation for the specific embodiment opened.
It should be noted that it can be directly another when element is referred to as " being fixed on ", " being set to " another element
On a element or there may also be elements placed in the middle.When an element is considered as " connection " another element, it be can be
It is directly connected to another element or may be simultaneously present centering elements.Term as used herein " vertically ", " level
", "left", "right" and similar statement for illustrative purposes only, be not meant to be the only embodiment.
The automatic oxygen supply apparatus of the application mainly includes control system, detection system and oxygen generating systems.Specifically,
The detection system is oxygen concentration sensor, and the control system is central processing unit or PLC controller, and the oxygen occurs
System is solid-state oxygen generator.
The working principle of the automatic oxygen supply apparatus is as follows: the oxygen under the detection system real-time detection current environment is dense
It spends and the oxygen concentration that will test sends control system to；The control system is according to the oxygen density value and system received
Preset oxygen density value is compared, when the oxygen density value detected is greater than the preset oxygen density value,
The oxygen generating systems do not start；When the oxygen density value detected is less than the preset oxygen density value, open
Move the oxygen generating systems oxygen supply.
The oxygen density value of the default is one, and the oxygen density value of the setting is located at a particular range
It is interior.
In other embodiments, the oxygen density value of the systemic presupposition can be two, and a preset oxygen is dense
Spend lower limit value, a preset oxygen concentration upper limit value.Oxygen concentration under the current environment that the detection system detects
When value is less than the preset oxygen concentration lower limit value, start the oxygen generating systems oxygen supply；When the detection system detects
When oxygen density value under the current environment arrived is greater than the preset oxygen concentration upper limit value, the oxygen generating systems are closed
Oxygen feeding stop.
The hardware configuration of the automatic oxygen supply apparatus of the application is as shown in figures 1-8.It is described automatic please referring initially to shown in Fig. 1-3
Apparatus of oxygen supply includes shell 10, the control system 41 being installed in the shell 10, detection system 42 and oxygen generating systems
30。
The shell 10 is substantially in cabinet body shape, including cabinet body 12, is immobilizated in the middle plate 13 of 12 upper end of cabinet body and covers
Overturning lid 14 above the cabinet body 12.12 upper end of cabinet body, middle plate 13 and the overturning lid 14, which enclose, to be set as one and releases
11 between emptying.The oxygen generating systems 30 are installed in the cabinet body 12 of 13 lower part of middle plate.12 top of the cabinet body setting
At skewed, described 14 one end of overturning lid is movably hinged in the higher top side of the cabinet body 12 and passes through a damper rod 15
The overturning lid 14 is supported when the overturning lid 14 is opened.The connection control system is installed on the overturning lid 14
The display screen 70 of system 41 and the connection Free up Memory 11 and extraneous air-out component 50.The detection system 42 is installed on institute
It states outside cabinet body 12.
12 two sides of cabinet body are equipped with handle member 121, convenient for the mobile automatic oxygen supply apparatus of artificial both hands.
It please refers to shown in Fig. 3, Fig. 4, Fig. 5, the air-out component 50 includes fan 51 and air outlet hinge 52.The wind
Fan 51 is located at 11 side of Free up Memory, and the air outlet hinge 52 is located at the upside of the fan 51, and the air outlet closes
Page 52 includes outer framework 521, several leaf of hinge 522 and the connector 523 for being linked together several leaf of hinge 522.
The opposite two sidewalls of the outer framework 521 are equipped with several through-holes 524, and the both ends of the leaf of hinge 522 are respectively equipped with several wear
Pillar 525 in the through-hole 524 is so that the leaf of hinge 522 can be rotated around the through-hole 524.The connector 523
It is in long strip, it is equipped with clip slot 526 in the side of each leaf of hinge 522 of correspondence, the clip slot 526 is by several leaf of hinge 522
It is connected as one, drives all leaf of hinge to rotate together when the rotation of one of leaf of hinge 522.The air-out component 50 is used for
The oxygen generated in the Free up Memory 11 is sent via the air outlet hinge 52 to the external world by the effect of the fan 51,
To increase the oxygen content of free surrounding space.
It please refers to shown in Fig. 1-4, Fig. 6-8, the oxygen generating systems 30 include being set to bottom position in the cabinet body 12
Pedestal 33, the guide rail 31 that the pedestal 33 is fixed in one end and the other end is fixed on the middle plate 13 and be contained in described
The oxygen generator 32 being electrically connected in guide rail 31 and with the pedestal 33.The guide rail 31, oxygen generator 32 are cylindrical in shape
Structure.
The oxygen generator 32 includes tubular receiving portion 321 and the pedestal set on described 321 one end of tubular receiving portion
322.Another end opening of the tubular receiving portion 321 is located in the Free up Memory 11.The pedestal 322 includes lateral wall
3222, interior protuberance 3223 and holding between the lateral wall 3222 and the interior protuberance 3223 for accommodating the tubular
Receive the affixed slot 3221 of 321 one end of portion.Two mounting holes up and down are respectively equipped in the interior protuberance 3223 of the pedestal 322
3224,3225, the pedestal 322 further includes the conductive terminal 60 for wearing the mounting hole 3224,3225.The conductive terminal 60
Including contact component 61, it is sheathed on the pressure line terminal 62 of 61 lower end of contact component and is immobilizated in the pressure line terminal 62
The nut 63 of 61 lower end of contact component.The contact component 61 includes the biggish middle part 612 of outer diameter, from the middle part
612 upwardly extend and outer diameter is less than the contact end 611 of the middle part 612 and extends from 612 lower end of middle part and outer
Diameter is less than the threaded portion 613 of the middle part 612.The pressure line terminal 62 is sheathed on 613 periphery of threaded portion, the nut
63, which are screwed together in the threaded portion 613, is immobilizated in the pressure line terminal 62 on the threaded portion 613, and the pressure line terminal 62 is used for
Crimping is located at contact cable taking or connecting terminal (not shown) in pedestal 33.
The internal diameter of mounting hole 3224,3225 on the outer diameter of the middle part 61 of the contact component 61 and the pedestal 322
It is identical, it can prevent the solid oxygen medicinal powder in the tubular receiving portion 321 from leaking out.The periphery of the middle part 61 can coat one
Layer antiseep film (not shown) is to seal the mounting hole 3224,3225.
The oxygen generator 32 can from the guide rail 31 disassembled and assembled freely, carry out more dressing without dismounting entire machine
Powder.
The tubular receiving portion 321 constitutes the accommodating space of receiving solid oxygen with the pedestal 322, when the detection of the application
When system 42 detects that the oxygen density value of current environment is lower than default oxygen density value, the control system 41 controls the oxygen
Gas generating system 30 works, i.e., after the circuit in two conductive terminals 60 of the oxygen generator 32 is connected, makes the cylinder
When resistance wire fever inside shape receiving portion 321 reaches certain temperature, the solid oxygen medicinal powder caused in it reacts and generates oxygen
It discharges from the upper end of the tubular receiving portion 321 to Free up Memory 11, finally by the air-out component 50 by the oxygen
It is sent in free surrounding space.When the detection system 42 detects that the oxygen density value of current environment is higher than default oxygen density value
When, the control system 41 controls the oxygen generating systems 30 and stops working, that is, two for cancelling the oxygen generator 32
The voltage applied in conductive terminal 60.
The application automatic oxygen supply apparatus by the oxygen density value of 42 real-time detection current environment of detection system and with it is default
Oxygen density value is compared, and comparison result is controlled to work or the pass of the oxygen generating systems 30 by control system 41
It closes, avoids the defect that the prior art needs to carry out manual control switch.Especially in underground job environment, oxygen concentration may become
Change comparatively fast, manual operation may cause the generation of major accident not in time, and the automatic oxygen supply apparatus of the application can be effectively prevent
Oxygen content bust brings the strain time to operating personnel.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The several embodiments that the present invention invents above described embodiment only expresses, the description thereof is more specific and detailed,
But it cannot be understood as the limitations to invention patent of invention range.It should be pointed out that for the common skill of this field
For art personnel, under the premise of not departing from inventive concept of the present invention, various modifications and improvements can be made, these are belonged to
The protection scope that the present invention invents.Therefore, the scope of protection shall be subject to the appended claims for patent of invention of the present invention.
Claims (3)
1. a kind of automatic oxygen supply apparatus, which is characterized in that including
Detection system, for detecting current environment oxygen density value；
Oxygen generating systems, for generating oxygen and being supplied to current environment；
Control system, current environment oxygen density value for detecting the detection system and preset oxygen density value into
Row compares, and controls the oxygen generating systems according to the comparison result and opens or closes；
It further include the shell in cabinet body shape, the shell includes cabinet body, the middle plate being placed in the cabinet body upper end and rotationally
It is installed on the overturning lid on the cabinet body top, the cabinet body, middle plate and overturning lid enclose and be set as a Free up Memory, the oxygen
Gas generating system is installed on the lower section for being located at the middle plate in the cabinet body, and the control system, detection system are installed on described
The inside of the shell outside cabinet body；
The display screen for connecting the control system and the connection Free up Memory and current environment are installed on the overturning lid
Air-out component；
The oxygen generating systems include:
Pedestal is fixed on the bottom of cabinet bulk；
Guide rail, described guide rail one end are fixed on the pedestal, and the other end is fixed on the middle plate；
Oxygen generator, the oxygen generator are inserted in the guide rail and are electrically connected with the control system；
The oxygen generator includes:
Tubular receiving portion, for accommodating solid-state medicinal powder, the tubular receiving portion open at one end is simultaneously located in the Free up Memory；
Pedestal, for holding the other end of the tubular receiving portion；
The pedestal is equipped with a pair of conductive terminal, and the control system makes institute by the circuit connected on a pair of conductive terminal
The resistance wire in tubular receiving portion is stated to generate heat and the medicinal powder in the tubular receiving portion is made to react simultaneously when reaching certain temperature
Generate oxygen；
The preset oxygen density value is two, on a preset oxygen concentration lower limit value, a preset oxygen concentration
Limit value, when the oxygen density value under the current environment that the detection system detects is less than the preset oxygen concentration lower limit value
When, start the oxygen generating systems oxygen supply；When the oxygen density value under the current environment that the detection system detects is greater than
When the preset oxygen concentration upper limit value, the oxygen generating systems oxygen feeding stop is closed.
2. automatic oxygen supply apparatus according to claim 1, which is characterized in that the pedestal include lateral wall, interior protuberance and
The affixed slot for being used to accommodate described tubular receiving portion one end between the lateral wall and the interior protuberance.
3. -2 described in any item automatic oxygen supply apparatus according to claim 1, which is characterized in that the detection system is that oxygen is dense
Sensor is spent, the control system is central processing unit or PLC controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511017298.8A CN105381527B (en) | 2015-12-29 | 2015-12-29 | Automatic oxygen supply apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511017298.8A CN105381527B (en) | 2015-12-29 | 2015-12-29 | Automatic oxygen supply apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105381527A CN105381527A (en) | 2016-03-09 |
| CN105381527B true CN105381527B (en) | 2019-05-31 |
Family
ID=55414692
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201511017298.8A Active CN105381527B (en) | 2015-12-29 | 2015-12-29 | Automatic oxygen supply apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105381527B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN204446863U (en) * | 2015-01-30 | 2015-07-08 | 成都兴邦泰实业有限责任公司 | The oxygen diffuse outlet panel that a kind of human body sensing concentration is controlled |
| CN204848263U (en) * | 2015-06-26 | 2015-12-09 | 中物功能材料研究院有限公司 | Position oxygen suppliment machine |
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| CN2361302Y (en) * | 1998-12-27 | 2000-02-02 | 王晓灿 | Oxygen and drug steam generating therapeutic beautifying device |
| CN102287223B (en) * | 2011-07-14 | 2013-04-17 | 山东国泰科技有限公司 | Integrated life security device of refuge chamber or life-saving compartment based on PID (proportion-integration-differentiation)) integrated control |
| CN202280475U (en) * | 2011-11-03 | 2012-06-20 | 广东安邦救援装备股份有限公司西安分公司 | Automatic oxygen supply device of movable escape capsule |
| US8741221B2 (en) * | 2012-04-03 | 2014-06-03 | B/E Aerospace, Inc. | Chemical oxygen generator with chemical cores arranged in parallel |
| CN103206241A (en) * | 2012-12-24 | 2013-07-17 | 湖北航天化学技术研究所 | Durable mining lifesaving cabin automatic oxygen supplying system capable of supplying oxygen through safety oxygen source |
| CN103362544B (en) * | 2013-07-15 | 2015-11-04 | 北京科技大学 | The oxygen candle oxygen system of emergency refuge space |
| CN203812105U (en) * | 2013-09-05 | 2014-09-03 | 北京联合大学 | Automatic oxygen-supply system |
| CN204390059U (en) * | 2015-01-29 | 2015-06-10 | 中物功能材料研究院有限公司 | Oxygen detection system |
| CN204832815U (en) * | 2015-06-26 | 2015-12-02 | 中物功能材料研究院有限公司 | Position oxygen suppliment machine control system |
| CN205360173U (en) * | 2015-12-29 | 2016-07-06 | 中物功能材料研究院有限公司 | Automatic apparatus of oxygen supply |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204446863U (en) * | 2015-01-30 | 2015-07-08 | 成都兴邦泰实业有限责任公司 | The oxygen diffuse outlet panel that a kind of human body sensing concentration is controlled |
| CN204848263U (en) * | 2015-06-26 | 2015-12-09 | 中物功能材料研究院有限公司 | Position oxygen suppliment machine |
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| CN105381527A (en) | 2016-03-09 |
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