CN212327128U - Control device of oxygen supply system - Google Patents
Control device of oxygen supply system Download PDFInfo
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- CN212327128U CN212327128U CN202021279912.4U CN202021279912U CN212327128U CN 212327128 U CN212327128 U CN 212327128U CN 202021279912 U CN202021279912 U CN 202021279912U CN 212327128 U CN212327128 U CN 212327128U
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Abstract
The utility model relates to a control device of oxygen system, this control device includes: the oxygen inlet pipe is used for communicating the liquid oxygen storage tank and providing oxygen; the oxygen output joint is used for connecting the nasal suction tube and supplying oxygen to a human body; the electromagnetic valve is used for controlling the on-off of a pipeline between the oxygen inlet pipe and the oxygen output connector; the pressure difference sensor is communicated with the oxygen output connector and is used for sensing the expiration and inspiration of the human body; the adjusting knob is used for setting an oxygen therapy mode and transmitting mode information to the control mainboard; the control main board is used for receiving the expiration and inspiration signals of the differential pressure sensor, receiving the mode information set by the adjusting knob, and outputting oxygen according to the mode set by the adjusting knob and the expiration and inspiration signals of the differential pressure sensor; the oxygen therapy method of the utility model is as follows: when a human body inhales, the electromagnetic valve is opened to output oxygen, and when the human body exhales, the electromagnetic valve is closed to stop outputting oxygen. The utility model provides high oxygen's utilization ratio, it is long when increasing the oxygen output of apparatus of oxygen suppliment.
Description
Technical Field
The utility model relates to a low temperature stores up oxygen suppliment technical field, in particular to oxygen system.
Background
At present, medical, plateau or other oxygen needs are mainly needed, continuous oxygen output is obtained through products such as ward equipment belts, oxygen generators, high-pressure oxygen bottles, portable oxygen tanks and the like, and great waste is caused because oxygen is continuously output when a human body exhales. When considering outdoor oxygen consumption, equipment such as a high-pressure oxygen cylinder, an oxygen generator and the like is not suitable due to factors such as large volume, heaviness and the like, at present, a portable oxygen tank is mostly adopted, oxygen is stored in a high-pressure gaseous state, and the oxygen can be only absorbed for about 1 hour due to small capacity, so that the outdoor construction or travel requirement for a long time cannot be met. When liquid oxygen is converted into gaseous oxygen, the volume of the liquid oxygen can reach 860 times of the original volume, and compared with a gaseous storage mode, the same container can realize oxygen storage with larger capacity.
In order to increase the oxygen inhalation time, the conventional oxygen supply device disclosed in CN101626809B has a housing defining a breathable air zone for a user wearing the respirator; an air flow control system for a respirator has an air delivery conduit within a shell of the respirator, a valve member movable relative to the air delivery conduit and within the shell for varying the amount of air flow through the air delivery conduit, and a valve actuator external to the shell of the respirator that is manipulable by a user of the respirator while wearing the respirator to control the movement of the valve member by adjusting the flow of oxygen to increase the utilization of oxygen and increase the length of oxygen provided by the oxygen supply device according to the needs of the person.
The oxygen supply device disclosed in the above patent can adjust the flow rate of oxygen according to the needs of different people, but does play a role in increasing the oxygen output time for people with small oxygen demand, but the effect is not obvious, and hardly plays a role in increasing the oxygen supply time for people with large oxygen demand. The reason why the oxygen supply device according to the above patent is insufficient in increasing the oxygen supply time period is that: the oxygen supply device continuously outputs oxygen, but when a person breathes, the person only needs to inhale the oxygen, so when the person breathes, the oxygen storage tank or the liquid oxygen storage tank continuously outputs the oxygen, which is useless and still causes waste.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a controlling means of oxygen system is proposed to the oxygen utilization rate that oxygen feeding device exists among the prior art is low, length scheduling problem during the oxygen suppliment.
In order to achieve the purpose, the utility model provides a technical scheme does:
the utility model relates to a control device of oxygen system, include:
the oxygen inlet pipe is used for communicating the liquid oxygen storage tank and providing oxygen;
the oxygen output joint is used for connecting the nasal suction tube and supplying oxygen to a human body;
the electromagnetic valve is used for controlling the on-off of a pipeline between the oxygen inlet pipe and the oxygen output connector;
the pressure difference sensor is communicated with the oxygen output connector and is used for sensing the breathing condition of the human body;
and the control circuit is used for receiving the breathing signal of the pressure difference sensor, opening the electromagnetic valve to output oxygen when the human body inhales according to the breathing signal, and closing the electromagnetic valve to stop outputting oxygen when the human body exhales.
Preferably, the solenoid valve includes solenoid valve A mouth, solenoid valve B mouth and solenoid valve C mouth, and oxygen intake pipe is connected with solenoid valve A mouth, and oxygen output connects and is connected with solenoid valve B mouth, and differential pressure sensor is connected with solenoid valve C mouth.
Preferably, it further comprises: and the band switch is used for setting an oxygen therapy mode and transmitting the mode information to the control circuit, and is provided with a knob for adjusting the band switch.
Preferably, the oxygen supply device further comprises a continuous output control valve block, wherein the continuous output control valve block is matched with the wave band switch and used for skipping over the electromagnetic valve to directly communicate the oxygen inlet pipe and the oxygen output connector.
Preferably, the continuous output control valve block is internally provided with a valve block pipeline and a valve rod, two ends of the valve block pipeline are respectively communicated with the oxygen inlet pipe and the oxygen output connector, the valve rod is arranged in the valve block pipeline, a sealing ring used for plugging the valve block pipeline is arranged on the outer ring of the valve rod, one end of the valve rod is provided with a spring, and the other end of the valve rod is matched with the wave band switch.
Preferably, the valve block pipeline is provided with a reducing section, and the sealing ring is arranged at the reducing section and matched with the reducing section.
Preferably, the wave band switch is provided with a cam, and the cam is matched with the valve rod.
Preferably, the cam is provided with a cam protrusion, and the cam protrusion is matched with the valve rod.
Adopt the technical scheme provided by the utility model, compare with prior art, have following beneficial effect:
1. the utility model relates to an oxygen system has set up pressure differential sensor, utilizes pressure differential sensor response human breathing, switches on oxygen intake pipe and oxygen output joint and provide oxygen to the human body when the human body breathes in, blocks oxygen intake pipe and oxygen output joint and stops output oxygen when the human body exhales, and continuous output oxygen compares with traditional method, the utility model provides high oxygen's utilization ratio increases when apparatus oxygen output of oxygen supply.
2. The oxygen supply system can set the oxygen supply mode through the wave band switch, and the oxygen supply mode comprises an automatic flow adjusting mode and a fixed flow mode; when the automatic flow adjusting mode is adopted, the pressure difference sensor senses the expiration and inspiration of a human body, the oxygen inlet pipe and the oxygen output connector are conducted when the pressure difference sensor senses the inspiration of the human body, the average time length of one breath is calculated at the same time, the inspiration time length of the human body is calculated according to the inspiration and expiration time ratio in one breath and the average breath time length under the normal condition of the human body, and the conducted time length is the calculated inspiration time length; when the human body is in the fixed flow mode, the fixed time of air suction is set, the oxygen inlet pipe and the oxygen output connector are conducted when the differential pressure sensor senses that the human body sucks air, and the conduction duration is the set fixed time of air suction. The utility model discloses the mode of selecting for choice is many, and the time of output oxygen at every turn of control that can be accurate avoids extravagant.
3. The utility model relates to an oxygen system's controlling means has still set up continuous oxygen therapy mode, when being in emergency, for example human oxygen demand is very big or wave band switch and control circuit's communication connection inefficacy, and the valve rod is opened through mechanical means to the rotatory wave band switch of accessible, makes oxygen system continuously output oxygen.
Drawings
FIG. 1 is a front view of a control device of the oxygen supply system of the present invention;
FIG. 2 is a plan view of the control device of the oxygen supply system of the present invention;
FIG. 3 is a horizontal sectional view of the control device of the oxygen supply system of the present invention;
FIG. 4 is a graphical illustration of the position of the waveband switch and valve stem;
FIG. 5 is a time-pressure plot of inspiration and expiration during breathing;
fig. 6 is a functional block diagram of the control circuit.
Illustration of the drawings: 1-oxygen inlet pipe, 2-oxygen output joint, 3-electromagnetic valve, 4-differential pressure sensor, 5-wave switch, 6-control circuit, 7-continuous output control valve block, 8-cam, 9-valve block pipeline, 10-valve rod, 11-sealing ring, 12-spring and 13-cam projection.
Detailed Description
For further understanding of the present invention, the present invention will be described in detail with reference to the following examples, which are provided for illustration of the present invention but are not intended to limit the scope of the present invention.
Example one
Referring to fig. 1 and 2, the present invention relates to a control device for an oxygen supply system, comprising:
the oxygen inlet pipe 1 is used for communicating the liquid oxygen storage tank and providing oxygen;
the oxygen output connector 2 is used for connecting the nasal suction tube and supplying oxygen to the human body;
the electromagnetic valve 3 is used for controlling the on-off of a pipeline between the oxygen inlet pipe 1 and the oxygen output connector 2, the electromagnetic valve comprises an electromagnetic valve port A, an electromagnetic valve port B and an electromagnetic valve port C, the oxygen inlet pipe 1 is connected with the electromagnetic valve port A, the oxygen output connector 2 is connected with the electromagnetic valve port B, and the differential pressure sensor 4 is connected with the electromagnetic valve port C;
the differential pressure sensor 4 is communicated with the oxygen output connector 2 and is used for sensing the expiration and inspiration of the human body;
the wave band switch 5 is used for setting an oxygen therapy mode and transmitting mode information to the control circuit 6, and the wave band switch 5 is provided with a knob and used for adjusting the wave band switch;
the control circuit 6 is used for receiving the expiration and inspiration signals of the pressure difference sensor 4 and the mode information set by the waveband switch 5, opening the electromagnetic valve 3 to output oxygen when a human body inhales according to the mode set by the waveband switch 5 and the expiration and inspiration signals of the pressure difference sensor 4, and closing the electromagnetic valve 3 to stop outputting oxygen when the human body exhales;
the wave band switch 5 is provided with an oxygen therapy mode comprising a fixed flow mode and an automatic flow adjustment mode, wherein the automatic flow adjustment mode is that the pressure difference sensor 4 is used for sensing the inspiration of a human body, the control circuit 6 is used for calculating the inspiration time according to the received inspiration signal and the inspiration and expiration time proportion in one breath of the human body, and the on-off state of the electromagnetic valve is changed alternately according to the inspiration time; the fixed flow mode is that the pressure difference sensor 4 senses the air suction of a human body, the control circuit 6 receives an air suction signal, and the on-off state of the electromagnetic valve is changed alternately according to the set fixed time of each air suction.
Referring to fig. 3 and 4, the control device of the oxygen supply system further includes a continuous output control valve block 7, the wave band switch is further provided with a cam 8, and the cam 8 is provided with a cam protrusion 13; be equipped with valve block pipeline 9 and valve rod 10 in the continuous output control valve block 7, the both ends of valve block pipeline 9 communicate with oxygen intake pipe 1 and oxygen output connector 2 respectively, be equipped with the reducing section in the valve block pipeline 9, valve rod 10 sets up in valve block pipeline 9, the outer lane of valve rod 10 is equipped with the sealing washer 11 that is used for shutoff valve block pipeline 9, sealing washer 11 and reducing section cooperation, the one end of valve rod 10 is equipped with spring 12, the other end and the cooperation of wave band switch 5.
The control device of the oxygen supply system is also provided with a continuous oxygen supply mode, when the oxygen supply system is in an emergency state, for example, the oxygen demand of a human body is large or the communication connection between the wave band switch and the control circuit is failed, the wave band switch 5 can be rotated by the knob, so that the end part of the valve rod 10 is propped against the cam bulge 13 of the cam, and the valve rod 10 is further opened in a mechanical mode, so that the oxygen supply system continuously outputs oxygen.
The band switch can switch oxygen delivery state, can close the air supply, oxygen suppliment under the automatic adjustment flow mode, oxygen suppliment under the fixed flow mode or oxygen suppliment under the continuous oxygen suppliment mode, wherein the oxygen suppliment can divide into again under the fixed flow mode five gears in 0.3 seconds, 0.5 seconds, 0.8 seconds, 1.2 seconds, 1.5 seconds and 2.0 seconds, under closing air supply and continuous oxygen suppliment mode, the complete machine is not controlled by the controlling device, switches through mechanical system.
Referring to fig. 6, the control circuit 6 includes an MCU, a power module and a driving module, the band switch and the differential pressure sensor are both connected to the MCU, an amplifier is further disposed between the differential pressure sensor and the MCU for amplifying a differential pressure signal generated by inspiration, and the signal is transmitted to the MCU after being amplified; the power module comprises a battery box, a booster circuit and a low-dropout linear regulator (LDO) which are sequentially connected, the battery box is arranged in a battery socket and is a four-section LR14 battery, the battery box can be used for the complete machine to work for 10-16 hours in a fixed flow mode, the LDO is connected with the MCU, the battery box is used for providing 3V electric energy, the booster circuit boosts the voltage to 6V, the LDO stabilizes the voltage at 5V and provides stable voltage for the MCU and the driving module, when the wave switch is in a closed state or in the continuous output module, the booster circuit is closed, the MCU does not need to control the driving module, the MCU, the amplifier and the voltage difference sensor all need stable voltage, and the battery power supply voltage is obtained by the boosting and then reducing the voltage of the booster circuit due to instability of the battery power supply voltage; the driving module comprises an electromagnetic valve driving and protecting circuit, a booster circuit and an electromagnetic valve socket, the electromagnetic valve is installed on the electromagnetic valve socket, when the wave band switch is in an automatic flow adjusting mode and a fixed flow mode, the power supply module provides electric energy for the MCU, the MCU starts the battery valve driving and protecting circuit, and meanwhile, the booster circuit further boosts the voltage to 12V required by the electromagnetic valve so as to open the electromagnetic valve; the MCU is also connected with a red, green and blue direct-inserted indicator lamp which is used for synchronous display of the action of the electromagnetic valve, display of the action of the switch and display of the state of a product and fault maintenance indication.
The model of the electromagnetic valve 3 is VSONC-6S11-VE1F0, the electromagnetic valve is a two-position three-way electromagnetic valve, the power supply voltage is 12V, the power consumption is 1W, the pressure resistance is 200kPa, a hose can be directly connected, the inner diameter of the hose is 4mm, and the maximum size is about 50mm 24mm 16 mm; the type of the differential pressure sensor 4 is MP3V5010DP, the measuring range is 10kPa, the power supply voltage is 2.7-3.3V, two pipes are led out and can be directly connected to a hose, and a patch is welded on a PCB and used for converting the air pressure change in an air pipe during breathing into a voltage signal to be read by an MCU; the type of the band switch is MRA112(NKK), which has 8 gears; the boosting circuit adopts a silk-screen B6282A boosting chip with the model of SX1308, the voltage can be boosted to 12V from 2.5V, and the efficiency is more than 90%; the LDO adopts an LS883 type low-dropout linear regulator, the solenoid valve driving and protecting circuit adopts an IRF540 driving solenoid valve circuit, the amplifier adopts a German Volfa amplifier signal module with the model of VOL-RS232, the MCU adopts the model of MKE02Z64LVD4, the working pressure is 4.5-5.5V, and a Cotex-M series kernel is used for reading the shift of a waveband switch, sampling the change of a voltage signal of a differential pressure sensor, judging whether the suction action is carried out or not, and then controlling the solenoid valve to switch a passage to supply oxygen.
Example two
Based on the control device of the oxygen supply system in the first embodiment, the present embodiment adopts the automatic flow rate adjustment mode to provide oxygen to the human body, and the specific steps include:
1) setting an oxygen delivery mode through a band switch, and setting the oxygen delivery mode to an automatic flow regulation mode;
2) the electromagnetic valve 4 is communicated with the oxygen output connector 2 and the differential pressure sensor 4 to block the oxygen inlet pipe 1 and the oxygen output connector 2, and at the moment, the differential pressure sensor 4 senses the inspiration of a human body;
3) when the differential pressure sensor 4 senses that a human body inhales air and transmits the signal to the control circuit 6, the control circuit 6 changes the state of the electromagnetic valve 3, so that the electromagnetic valve 3 blocks the oxygen output connector 2 and the differential pressure sensor 4, and the oxygen inlet pipe 1 and the oxygen output connector 2 are communicated to provide oxygen for the human body;
4) when the inspiration time of the human body reaches the set time, the control circuit closes the electromagnetic valve, stops outputting oxygen, and the control device returns to the state of the step 2),
the embodiment adopts an automatic flow rate adjusting mode, when an oxygen supply system is delivered from a factory, the time proportion of inspiration time and expiration time in one breath of a human body is set in a control circuit 6, the time proportion is generally 1: 1.5-1: 2, as shown in figure 5, the inspiration starting signal and the breathing frequency signal of the human body are obtained through a pressure difference sensor, the control circuit receives the signal obtained by the pressure difference sensor and records the data obtained by the pressure difference sensor in a plurality of inspirations and exhalations, the variation trend of the breathing period, the inspiration time and the pressure difference size is statistically analyzed, the inspiration time required by the next inspiration is calculated, the calculated inspiration time required by the next inspiration is taken as the set time, the control circuit controls the on-off state of an electromagnetic valve according to the inspiration starting signal and the set time obtained by the pressure difference sensor,
for example, the set time ratio is 1:2, the differential pressure sensor 4 senses 10 inhalations, the interval time of the starting points of the inhalations in the 10 breaths is taken as the time length of each breath, and the average time length of one breath is calculated as T according to the total time length of the 10 breathsGeneral assemblyLet T beGeneral assemblyWhen the time is 3 seconds, the human body can be calculated onceIn the breath, the inspiration time T 11 second, expiration time T2When the pressure difference sensor 4 senses that a human body inhales, the time for the electromagnetic valve 3 to communicate the oxygen inlet pipe 1 with the oxygen output connector 2 is 1 second, and after 1 second, the electromagnetic valve 3 is closed;
5) and repeating the steps 2) to 4), outputting oxygen when the human body inhales, and stopping outputting the oxygen when the human body exhales.
EXAMPLE III
On the basis of the first embodiment, the control device of the oxygen supply system is further provided with an expiratory tube, the expiratory tube is used for being connected with the back of the mouth of a human body and connected with the differential pressure sensor 4, and is not directly connected with the differential pressure sensor 4 through the electromagnetic valve 3, and the differential pressure sensor 4 not only induces inspiration, but also induces expiration.
Based on the above-mentioned controlling means of oxygen system, this embodiment adopts the automatic flow regulation mode of adjusting to provide oxygen for the human body, and its concrete step includes:
1) setting an oxygen delivery mode through a band switch, and setting the oxygen delivery mode to an automatic flow regulation mode;
2) the electromagnetic valve 4 is communicated with the oxygen output connector 2 and the differential pressure sensor 4 to block the oxygen inlet pipe 1 and the oxygen output connector 2, and at the moment, the differential pressure sensor 4 senses the inspiration of a human body;
3) when the differential pressure sensor 4 senses that a human body inhales air and transmits the signal to the control circuit 6, the control circuit 6 changes the state of the electromagnetic valve 3, so that the electromagnetic valve 3 blocks the oxygen output connector 2 and the differential pressure sensor 4, and the oxygen inlet pipe 1 and the oxygen output connector 2 are communicated to provide oxygen for the human body;
4) when the inspiration process of the human body is finished, namely when the pressure difference sensor 4 senses expiration of the human body through the expiration pipe, the electromagnetic valve is closed, and oxygen supply to the human body is stopped;
5) and repeating the steps 2) to 4), outputting oxygen when the human body inhales, and stopping outputting the oxygen when the human body exhales.
Example four
Based on the control device of the oxygen supply system in the first embodiment, the present embodiment adopts a fixed flow rate mode to provide oxygen for a human body, and the specific steps include:
1) the oxygen therapy mode is set through the band switch, the oxygen therapy mode is set to be the fixed flow mode, meanwhile, the fixed time of each oxygen therapy is set through the band switch under the fixed flow mode, in the embodiment, the fixed time of each oxygen therapy can be set to be 0.3 second, 0.5 second, 0.8 second, 1.2 second, 1.5 second or 2.0 seconds;
2) the electromagnetic valve 4 is communicated with the oxygen output connector 2 and the differential pressure sensor 4 to block the oxygen inlet pipe 1 and the oxygen output connector 2, and at the moment, the differential pressure sensor 4 senses the inspiration of a human body;
3) when the differential pressure sensor 4 senses that a human body inhales air and transmits the signal to the control circuit 6, the control circuit 6 changes the state of the electromagnetic valve 3, so that the electromagnetic valve 3 blocks the oxygen output connector 2 and the differential pressure sensor 4, and the oxygen inlet pipe 1 and the oxygen output connector 2 are communicated to provide oxygen for the human body;
4) when the inspiration time of the human body reaches the set time length, the control circuit 6 closes the electromagnetic valve, stops outputting oxygen, and the control device recovers to the state of the step 2);
5) and repeating the steps 2) to 4), outputting oxygen when the human body inhales, and stopping outputting the oxygen when the human body exhales.
EXAMPLE five
When the oxygen supply device is in an emergency state, for example, the oxygen demand of a human body is large or the communication connection between the wave band switch and the control circuit is failed, the oxygen supply mode can be modified into a continuous oxygen supply mode through the wave band switch 5, namely, the wave band switch 5 is rotated through the knob, the cam 8 is rotated to the end part of the valve rod 10, the end part of the valve rod 10 is propped against the cam bulge 13, the spring 12 is compressed, at the moment, the sealing ring 11 which is originally in close contact with the reducing section of the valve block pipeline 9 is separated from the reducing section, a gap appears, the oxygen inlet pipe 1 and the oxygen output connector 2 are always in a conducting state, oxygen enters from the oxygen inlet pipe 1 and is continuously output from the nasal suction pipe on the oxygen output connector 2 after passing through the valve block pipeline, and.
The present invention has been described in detail with reference to the embodiments, but the description is only for the preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. All the equivalent changes and improvements made according to the application scope of the present invention should still fall within the patent coverage of the present invention.
Claims (8)
1. A control device of an oxygen supply system is characterized in that: it includes:
the oxygen inlet pipe is used for communicating the liquid oxygen storage tank and providing oxygen;
the oxygen output joint is used for connecting the nasal suction tube and supplying oxygen to a human body;
the electromagnetic valve is used for controlling the on-off of a pipeline between the oxygen inlet pipe and the oxygen output connector;
the pressure difference sensor is communicated with the oxygen output connector and is used for sensing the breathing condition of the human body;
and the control circuit is used for receiving the breathing signal of the pressure difference sensor, opening the electromagnetic valve to output oxygen when the human body inhales according to the breathing signal, and closing the electromagnetic valve to stop outputting oxygen when the human body exhales.
2. The control device for an oxygen supply system according to claim 1, wherein: the electromagnetic valve comprises an electromagnetic valve port A, an electromagnetic valve port B and an electromagnetic valve port C, the oxygen inlet pipe is connected with the electromagnetic valve port A, the oxygen output connector is connected with the electromagnetic valve port B, and the differential pressure sensor is connected with the electromagnetic valve port C.
3. The control device for an oxygen supply system according to claim 1, wherein: it still includes: and the band switch is used for setting an oxygen therapy mode and transmitting the mode information to the control circuit, and is provided with a knob for adjusting the band switch.
4. The control device for an oxygen supply system according to claim 3, wherein: the continuous output control valve block is matched with the wave band switch and used for skipping over the electromagnetic valve to directly communicate the oxygen inlet pipe and the oxygen output connector.
5. The control device for an oxygen supply system according to claim 4, wherein: the continuous output control valve block is internally provided with a valve block pipeline and a valve rod, two ends of the valve block pipeline are respectively communicated with an oxygen inlet pipe and an oxygen output connector, the valve rod is arranged in the valve block pipeline, a sealing ring used for plugging the valve block pipeline is arranged on the outer ring of the valve rod, one end of the valve rod is provided with a spring, and the other end of the valve rod is matched with a wave band switch.
6. The control device for an oxygen supply system according to claim 5, wherein: the valve block pipeline is provided with a reducing section, and the sealing ring is arranged at the reducing section and matched with the reducing section.
7. The control device for an oxygen supply system according to claim 5, wherein: the wave band switch is provided with a cam, and the cam is matched with the valve rod.
8. The control device of an oxygen supply system according to claim 7, characterized in that: the cam is provided with a cam bulge, and the cam bulge is matched with the valve rod.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111729165A (en) * | 2020-07-02 | 2020-10-02 | 杭州富士达特种材料股份有限公司 | Control device for oxygen supply system and oxygen supply method |
| CN113350638A (en) * | 2021-04-19 | 2021-09-07 | 苏州氧巢科技有限公司 | Respiration induction oxygen saver and electromagnetic valve control method thereof |
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2020
- 2020-07-02 CN CN202021279912.4U patent/CN212327128U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111729165A (en) * | 2020-07-02 | 2020-10-02 | 杭州富士达特种材料股份有限公司 | Control device for oxygen supply system and oxygen supply method |
| CN113350638A (en) * | 2021-04-19 | 2021-09-07 | 苏州氧巢科技有限公司 | Respiration induction oxygen saver and electromagnetic valve control method thereof |
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