CN213964704U - Oxygen supply tank control circuit for respiratory medicine nursing - Google Patents
Oxygen supply tank control circuit for respiratory medicine nursing Download PDFInfo
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- CN213964704U CN213964704U CN202020442714.9U CN202020442714U CN213964704U CN 213964704 U CN213964704 U CN 213964704U CN 202020442714 U CN202020442714 U CN 202020442714U CN 213964704 U CN213964704 U CN 213964704U
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Abstract
The utility model relates to the field of medical equipment, especially, relate to a breathe oxygen supply jar control circuit for internal medicine nursing. The utility model provides a can heat the oxygen in the oxygen supply jar, avoid patient to feel uncomfortable oxygen supply jar control circuit for the nursing of breathing internal medicine. The technical scheme is as follows: a control circuit of an oxygen supply tank for nursing in respiratory medicine comprises a power supply module, a first switch, a water inlet valve and the like; the first switch is connected with the water inlet valve. The utility model can lead hot water to flow into the oxygen supply tank by opening the water inlet valve, and heat the oxygen in the oxygen supply tank, thereby avoiding the cold oxygen from causing the discomfort of patients; can remind medical personnel not enough in temperature through the pilot lamp, need in time trade water, bee calling organ can remind medical personnel that the temperature is enough, can stop adding water.
Description
Technical Field
The utility model relates to the field of medical equipment, especially, relate to a breathe oxygen supply jar control circuit for internal medicine nursing.
Background
Respiratory system diseases such as respiratory tract infection, emphysema, pulmonary heart disease, pleural lesion and the like and various toxic diseases are mainly treated in the department of respiratory medicine, in particular, deep research and abundant clinical experience are provided in the aspects of treatment of respiratory failure and critical medical rescue, in the department of respiratory medicine nursing, an oxygen supply tank is required to supply oxygen to a patient, but the oxygen in the oxygen supply tank is relatively cool and can cause the patient to feel uncomfortable, so that a control circuit of the oxygen supply tank for respiratory medicine nursing is designed, the oxygen in the oxygen supply tank can be heated, and the patient is prevented from feeling uncomfortable.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defect that the oxygen in the oxygen supply tank is cool and can cause a patient to feel uncomfortable, the utility model discloses a technical problem: provides a control circuit of an oxygen supply tank for respiratory medical nursing, which can heat the oxygen in the oxygen supply tank and avoid the patient from feeling uncomfortable.
The technical scheme is as follows: a control circuit of an oxygen supply tank for nursing in a respiratory medicine comprises a power module, a first switch, a water inlet valve, a second switch and a water outlet valve, wherein the first switch is connected with the water inlet valve, the second switch is connected with the water outlet valve, and the power module supplies power to the first switch, the water inlet valve, the second switch and the water outlet valve.
Optionally, the temperature measuring device further comprises a thermistor, a temperature measuring bridge circuit, a temperature detecting circuit, an alarm circuit, a buzzer and an indicator light, wherein the thermistor is connected with the input end of the temperature measuring bridge circuit, the output end of the temperature measuring bridge circuit is connected with the input end of the temperature detecting circuit, the output end of the temperature detecting circuit is connected with the alarm circuit and the indicator light, the output end of the alarm circuit is connected with the buzzer, and the power supply module supplies power for the thermistor, the temperature measuring bridge circuit, the temperature detecting circuit, the alarm circuit, the buzzer and the indicator light.
Optionally, the first switch comprises a soft touch switch SW1, resistors R1-R8, a transistor Q1-Q3, diodes D1-D2, an electrolytic capacitor EC1, a relay RL1 and a capacitor C1, the emitter of the transistor Q1 is grounded, the base of the transistor Q1 is respectively connected with a resistor R2 and a resistor R3 in series, the other end of the resistor R3 is grounded, the electrolytic capacitor EC1 is connected with a resistor R1 and a soft touch switch SW1 in series, the other end of the soft touch switch SW1 is connected with +12V, the other end of the electrolytic capacitor EC1 is grounded, the other end of the resistor R2 is connected with a node between an electrolytic capacitor EC1 and a resistor R1, the collector of the transistor Q1 is connected with a resistor R4 and a diode D1 in series, the anode of the diode D1 is connected with a node between the resistor R1 and the soft touch switch SW1, the emitter of the transistor Q2 is grounded, the base of the transistor Q2 is connected with a collector of the transistor Q1, the base of the triode Q2 is connected with a resistor R5 and a diode D2 in series, the anode of the diode D2 is grounded, two ends of the diode D2 are connected with a relay RL1 in parallel, the collector of the triode Q2 is connected with a resistor R6 and a resistor R7 in series respectively, the other end of the resistor R6 is connected with +12V, the emitter of the triode Q3 is connected with a resistor R8, the resistor R8 is connected with a relay RL1, the base of the triode Q3 is connected with a capacitor C1 in series, the other end of the capacitor C1 is connected with +12V, the collector of the triode Q3 is connected with +12V, the base of the triode Q3 is connected with a resistor R7, and the COM end of the relay RL1 is connected with + 12V.
Optionally, the second switch comprises a soft touch switch SW2, resistors R9-R16, a transistor Q4-Q6, diodes D3-D4, an electrolytic capacitor EC2, a relay RL2 and a capacitor C2, the emitter of the transistor Q6 is grounded, the base of the transistor Q6 is respectively connected with a resistor R10 and a resistor R11 in series, the other end of the resistor R11 is grounded, the electrolytic capacitor EC2 is connected with a resistor R9 and a soft touch switch SW2 in series, the other end of the soft touch switch SW2 is connected with +12V, the other end of the electrolytic capacitor EC2 is grounded, the other end of the resistor R10 is connected with a node between an electrolytic capacitor EC2 and a resistor R9, the collector of the transistor Q6 is connected with a resistor R12 and a diode D3 in series, the anode of the diode D3 is connected with a node between the resistor R9 and the soft touch switch SW2, the emitter of the transistor Q4 is grounded, the base of the transistor Q4 is connected with a collector of the transistor Q6, the base of the triode Q4 is connected with a resistor R15 and a diode D4 in series, the anode of the diode D4 is grounded, two ends of the diode D4 are connected with a relay RL2 in parallel, the collector of the triode Q4 is connected with a resistor R13 and a resistor R14 in series respectively, the other end of the resistor R13 is connected with +12V, the emitter of the triode Q5 is connected with a resistor R16, the resistor R16 is connected with a relay RL2, the base of the triode Q5 is connected with a capacitor C2 in series, the other end of the capacitor C2 is connected with +12V, the collector of the triode Q5 is connected with +12V, the base of the triode Q5 is connected with a resistor R14, and the COM end of the relay RL2 is connected with + 12V.
Optionally, the temperature detection circuit comprises an operational amplifier UA741, resistors R17-R21, resistors R24, RT, a light emitting diode VD1 and a potentiometer VR1, the pin 4 of the operational amplifier UA741 is grounded, the pin 7 of the operational amplifier UA741 is connected with +5V, the resistor R17 is connected in series with a resistor R18, the other end of the resistor R17 is connected with +5V, the other end of the resistor R18 is grounded, the 3-pin of the operational amplifier UA741 is connected with a node between the resistor R17 and the resistor R18, the RT is connected with the resistor R24 and the potentiometer VR1 in series, the other end of the RT is grounded, the other end of the potentiometer VR1 and the input end of the potentiometer are connected with +5V, the 2-pin of the operational amplifier UA741 is connected with a node between RT and a resistor R24, the resistor R19 is connected with a light emitting diode VD1, a resistor R20 and a resistor R21 in series, the other end of the resistor R19 is connected with +5V, the other end of the resistor R21 is grounded, and a pin 6 of the operational amplifier UA741 is connected with a node between the light-emitting diode VD1 and the resistor R20.
Optionally, the alarm circuit includes NE555, resistors R22-R23, capacitors C3-C4 and BZ1, where a pin 1 of the NE555 is grounded, a pin 8 of the NE555 is grounded to +5V, a pin 3 of the NE555 is grounded to BZ1, the other end of the BZ1 is grounded, a pin 5 of the NE555 is grounded to C4, the other end of the capacitor C4 is grounded, the resistor R22 is connected in series with the resistor R23 and the capacitor C3, the other end of the resistor R22 is grounded to +5V, the other end of the capacitor C3 is grounded, a pin 2 of the NE555 is connected in parallel with a pin 6 thereof and then connected to a node between the resistor R23 and the capacitor C3, and a pin 7 of the NE555 is connected to a node between the resistor R22 and the resistor R23.
The utility model has the advantages that: the utility model can lead hot water to flow into the oxygen supply tank by opening the water inlet valve, and heat the oxygen in the oxygen supply tank, thereby avoiding the cold oxygen from causing the discomfort of patients; can remind medical personnel not enough in temperature through the pilot lamp, need in time trade water, bee calling organ can remind medical personnel that the temperature is enough, can stop adding water.
Drawings
Fig. 1 is a circuit block diagram of the present invention.
Fig. 2 is a schematic circuit diagram of the present invention.
The meaning of the reference symbols in the figures: 1: power module, 2: first switch, 3: inlet valve, 4: second switch, 5: outlet valve, 6: thermistor, 7: temperature measuring bridge circuit, 8: temperature detection circuit, 9: alarm circuit, 10: buzzer, 11: and an indicator light.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the following detailed description.
Example 1
A control circuit of an oxygen supply tank for nursing in a respiratory medicine is shown in figure 1 and comprises a power module 1, a first switch 2, a water inlet valve 3, a second switch 4 and a water outlet valve 5, wherein the first switch 2 is connected with the water inlet valve 3, the second switch 4 is connected with the water outlet valve 5, and the power module 1 supplies power to the first switch 2, the water inlet valve 3, the second switch 4 and the water outlet valve 5.
After the oxygen supply tank control circuit for respiratory medicine nursing is powered on, medical staff press the first switch 2 for a short time to open the water inlet valve 3, hot water flows into the oxygen supply tank to heat oxygen in the oxygen supply tank, so that the patient is prevented from feeling uncomfortable due to ice-cold oxygen, and when sufficient hot water is filled in the oxygen supply tank, the medical staff press the first switch 2 for a long time to close the water inlet valve 3. When the temperature of the hot water in the oxygen supply tank is insufficient, the medical staff presses the second switch 4 for a short time to open the water outlet valve 5 to discharge the water in the oxygen supply tank, and after all the water is discharged, the medical staff presses the second switch 4 for a long time to close the water outlet valve 5.
Example 2
The utility model provides a breathe oxygen supply tank control circuit for internal medicine nursing, as shown in figure 1, still includes thermistor 6, temperature measurement bridge circuit 7, temperature detection circuit 8, alarm circuit 9, bee calling organ 10 and pilot lamp 11, thermistor 6 is connected with temperature measurement bridge circuit 7's input, temperature measurement bridge circuit 7's output and temperature detection circuit 8's input are connected, temperature detection circuit 8's output and alarm circuit 9 and pilot lamp 11 are connected, alarm circuit 9's output and bee calling organ 10 are connected, power module 1 is that thermistor 6, temperature measurement bridge circuit 7, temperature detection circuit 8, alarm circuit 9, bee calling organ 10 and pilot lamp 11 supply power.
Breathe internal medicine nursing after oxygen supply jar control circuit is gone up electricity, temperature detect circuit 8 begins work, temperature detect circuit 8 can detect the temperature in the oxygen supply jar, if the temperature that temperature detect circuit 8 detected is less than the temperature lower limit of setting for, pilot lamp 11 glimmers, remind medical personnel's temperature not enough, need in time trade water, the temperature that detects when temperature detect circuit 8 is higher than the temperature upper limit of setting for, pilot lamp 11 extinguishes, alarm circuit 9 control buzzer 10 makes the sound, it is enough to explain the temperature, can stop adding water.
Example 3
A control circuit of an oxygen supply tank for nursing in respiratory medicine is disclosed, as shown in figure 2, the first switch 2 comprises a light touch switch SW1, resistors R1-R8, transistors Q1-Q3, diodes D1-D2, an electrolytic capacitor EC1, a relay RL1 and a capacitor C1, the emitter of the transistor Q1 is grounded, the base of the transistor Q1 is respectively connected with a resistor R2 and a resistor R3 in series, the other end of the resistor R3 is grounded, the electrolytic capacitor EC1 is connected with a resistor R1 and a light touch switch SW1 in series, the other end of the light touch switch SW1 is connected with +12V, the other end of the electrolytic capacitor EC1 is grounded, the other end of the resistor R2 is connected with a node between the electrolytic capacitor EC1 and a resistor R1, the collector of the transistor Q1 is connected with a resistor R4 and a diode D1 in series, the anode of the diode D1 is connected with a node between the resistor R1 and the light touch switch SW1, the emitter of the transistor 2 is grounded, the base of the triode Q2 is connected with the collector of the triode Q1, the base of the triode Q2 is connected with a resistor R5 and a diode D2 in series, the anode of the diode D2 is grounded, two ends of the diode D2 are connected with a relay RL1 in parallel, the collector of the triode Q2 is connected with a resistor R6 and a resistor R7 in series respectively, the other end of the resistor R6 is connected with +12V, the emitter of the triode Q3 is connected with a resistor R8, the resistor R8 is connected with a relay RL1, the base of the triode Q3 is connected with a capacitor C1 in series, the other end of the capacitor C1 is connected with +12V, the collector of the triode Q3 is connected with +12V, the base of the triode Q3 is connected with the resistor R7, and the COM +12V of the relay RL 1.
The second switch 4 comprises a soft touch switch SW2, resistors R9-R16, a triode Q4-Q6, a diode D3-D4, an electrolytic capacitor EC2, a relay RL2 and a capacitor C2, the emitter of the triode Q6 is grounded, the base of the triode Q6 is respectively connected with a resistor R10 and a resistor R11 in series, the other end of the resistor R11 is grounded, the electrolytic capacitor EC2 is connected with a resistor R9 and a soft touch switch SW2 in series, the other end of the soft touch switch SW2 is connected with +12V, the other end of the electrolytic capacitor EC2 is grounded, the other end of the resistor R10 is connected with a node between an electrolytic capacitor EC2 and a resistor R9, the collector of the triode Q6 is connected with a resistor R12 and a diode D3 in series, the anode of the diode D3 is connected with a node between a resistor R9 and a soft touch switch 2, the emitter of the triode Q4 is grounded, the base of the transistor Q4 is connected with the base of the triode Q4 and the diode 4 in series, the anode of the diode D4 is grounded, two ends of the diode D4 are connected with a relay RL2 in parallel, the collector of the triode Q4 is respectively connected with a resistor R13 and a resistor R14 in series, the other end of the resistor R13 is connected with +12V, the emitter of the triode Q5 is connected with the resistor R16, the resistor R16 is connected with a relay RL2, the base of the triode Q5 is connected with a capacitor C2 in series, the other end of the capacitor C2 is connected with +12V, the collector of the triode Q5 is connected with +12V, the base of the triode Q5 is connected with the resistor R14, and the COM end of the relay RL2 is connected with + 12V.
The temperature detection circuit 8 comprises an operational amplifier UA741, resistors R17-R21, resistors R24, RT, a light-emitting diode VD1 and a potentiometer VR1, the pin 4 of the operational amplifier UA741 is grounded, the pin 7 of the operational amplifier UA741 is connected with +5V, the resistor R17 is connected in series with a resistor R18, the other end of the resistor R17 is connected with +5V, the other end of the resistor R18 is grounded, the 3-pin of the operational amplifier UA741 is connected with a node between the resistor R17 and the resistor R18, the RT is connected with the resistor R24 and the potentiometer VR1 in series, the other end of the RT is grounded, the other end of the potentiometer VR1 and the input end of the potentiometer are connected with +5V, the 2-pin of the operational amplifier UA741 is connected with a node between RT and a resistor R24, the resistor R19 is connected with a light emitting diode VD1, a resistor R20 and a resistor R21 in series, the other end of the resistor R19 is connected with +5V, the other end of the resistor R21 is grounded, and a pin 6 of the operational amplifier UA741 is connected with a node between the light-emitting diode VD1 and the resistor R20.
The alarm circuit 9 comprises NE555, resistors R22-R23, capacitors C3-C4 and BZ1, wherein a pin 1 of the NE555 is grounded, a pin 8 of the NE555 is grounded with +5V, a pin 3 of the NE555 is grounded with BZ1, the other end of the BZ1 is grounded, a pin 5 of the NE555 is grounded with a capacitor C4, the other end of the capacitor C4 is grounded, the resistor R22 is connected with the resistor R23 and the capacitor C3 in series, the other end of the resistor R22 is grounded with +5V, the other end of the capacitor C3 is grounded, a pin 2 of the NE555 is connected with a pin 6 in parallel and then connected with a node between the resistor R23 and the capacitor C3, and a pin 7 of the NE555 is connected with a node between the resistor R22 and the resistor R23.
After a control circuit of an oxygen supply tank for nursing in the respiratory medicine is powered on, a medical worker sets a proper water temperature range through a potentiometer VR1, then a touch switch SW1 is pressed for a short time, a water inlet valve 3 is opened, hot water flows into the oxygen supply tank, oxygen in the oxygen supply tank is heated, the patient is prevented from being uncomfortable by the ice-cold oxygen, when enough hot water is filled in the oxygen supply tank, the medical worker presses the touch switch SW1 for a long time to close the water inlet valve 3, RT can detect the water temperature in the oxygen supply tank, if the water temperature detected by RT is lower than a set water temperature lower limit, 6 feet of an operational amplifier UA741 output a low level, a light-emitting diode VD1 flickers to remind the medical worker that the water temperature is insufficient and needs to be changed in time, when the water temperature detected by RT is higher than the set water temperature upper limit, the 6 feet of the operational amplifier UA741 output a high level, the light-emitting diode VD1, BZ1 begins to alarm, which shows that the water temperature is enough and the water adding can be stopped.
It should be understood by those skilled in the art that the above embodiments do not limit the present invention in any way, and all technical solutions obtained by adopting equivalent replacement or equivalent transformation fall within the protection scope of the present invention.
Claims (5)
1. A control circuit of an oxygen supply tank for nursing in a respiratory medicine is characterized by comprising a power module, a first switch, a water inlet valve, a second switch and a water outlet valve, wherein the first switch is connected with the water inlet valve, the second switch is connected with the water outlet valve, and the power module supplies power to the first switch, the water inlet valve, the second switch and the water outlet valve; the temperature measuring device is characterized by further comprising a thermistor, a temperature measuring bridge circuit, a temperature detecting circuit, an alarm circuit, a buzzer and an indicator lamp, wherein the thermistor is connected with the input end of the temperature measuring bridge circuit, the output end of the temperature measuring bridge circuit is connected with the input end of the temperature detecting circuit, the output end of the temperature detecting circuit is connected with the alarm circuit and the indicator lamp, the output end of the alarm circuit is connected with the buzzer, and the power supply module supplies power for the thermistor, the temperature measuring bridge circuit, the temperature detecting circuit, the alarm circuit, the buzzer and the indicator lamp.
2. The control circuit of an oxygen supply tank for nursing in department of respiratory medicine as claimed in claim 1, wherein said first switch comprises a light touch switch SW1, resistors R1-R8, transistors Q1-Q3, diodes D1-D2, an electrolytic capacitor EC1, a relay RL1 and a capacitor C1, the emitter of said transistor Q1 is grounded, the base of said transistor Q1 is respectively connected in series with a resistor R2 and a resistor R3, the other end of said resistor R3 is grounded, said electrolytic capacitor EC1 is connected in series with a resistor R1 and a light touch switch SW1, the other end of said light touch switch SW1 is connected with +12V, the other end of said electrolytic capacitor EC1 is grounded, the other end of said resistor R2 is connected to a node between an electrolytic capacitor EC1 and a resistor R1, the collector of said transistor Q1 is connected in series with a resistor R4 and a diode D1, the anode of said diode D1 is connected to a node between a resistor R1 and a light touch switch SW1, the emitter of the triode Q2 is grounded, the base of the triode Q2 is connected with the collector of the triode Q1, the base of the triode Q2 is connected with a resistor R5 and a diode D2 in series, the anode of the diode D2 is grounded, two ends of the diode D2 are connected with a relay RL1 in parallel, the collector of the triode Q2 is connected with a resistor R6 and a resistor R7 in series respectively, the other end of the resistor R6 is connected with +12V, the emitter of the triode Q3 is connected with the resistor R8, the resistor R8 is connected with a relay RL1, the base of the triode Q3 is connected with a capacitor C1 in series, the other end of the capacitor C1 is connected with +12V, the collector of the triode Q3 is connected with +12V, the base of the triode Q3 is connected with the resistor R7, and the COM end of the relay RL1 is connected with + 12V.
3. The control circuit of an oxygen supply tank for nursing in department of respiratory medicine as claimed in claim 2, wherein said second switch comprises a light touch switch SW2, resistors R9-R16, transistors Q4-Q6, diodes D3-D4, an electrolytic capacitor EC2, a relay RL2 and a capacitor C2, the emitter of said transistor Q6 is grounded, the base of said transistor Q6 is respectively connected in series with a resistor R10 and a resistor R11, the other end of said resistor R11 is grounded, said electrolytic capacitor EC2 is connected in series with a resistor R9 and a light touch switch SW2, the other end of said light touch switch SW2 is connected with +12V, the other end of said electrolytic capacitor EC2 is grounded, the other end of said resistor R10 is connected to a node between an electrolytic capacitor EC2 and a resistor R9, the collector of said transistor Q6 is connected in series with a resistor R12 and a diode D3, the anode of said diode D3 is connected to a node between a resistor R9 and a light touch switch SW2, the emitter of the triode Q4 is grounded, the base of the triode Q4 is connected with the collector of the triode Q6, the base of the triode Q4 is connected with a resistor R15 and a diode D4 in series, the anode of the diode D4 is grounded, two ends of the diode D4 are connected with a relay RL2 in parallel, the collector of the triode Q4 is connected with a resistor R13 and a resistor R14 in series respectively, the other end of the resistor R13 is connected with +12V, the emitter of the triode Q5 is connected with the resistor R16, the resistor R16 is connected with a relay RL2, the base of the triode Q5 is connected with a capacitor C2 in series, the other end of the capacitor C2 is connected with +12V, the collector of the triode Q5 is connected with +12V, the base of the triode Q5 is connected with the resistor R14, and the COM end of the relay RL2 is connected with + 12V.
4. The control circuit of oxygen supply tank for respiratory medical care as claimed in claim 3, wherein said temperature detection circuit comprises an operational amplifier UA741, resistors R17-R21, resistors R24, RT, light emitting diode VD1 and a potentiometer VR1, wherein said operational amplifier UA741 has a pin 4 connected to ground, said operational amplifier UA741 has a pin 7 connected to +5V, said resistor R17 is serially connected to a resistor R18, said resistor R17 has another pin +5V, said resistor R18 has another pin connected to ground, said operational amplifier UA741 has a pin 3 connected to a node between a resistor R17 and a resistor R18, said RT is serially connected to a resistor R24 and a potentiometer VR1, said RT has another pin connected to ground, said potentiometer VR1 has another pin connected to +5V, said operational amplifier UA741 has a pin 2 connected to a node between the RT and a resistor R24, said resistor R19 is serially connected to a light emitting diode VD1, a resistor R20 and a resistor R21, the other end of the resistor R19 is connected with +5V, the other end of the resistor R21 is grounded, and a pin 6 of the operational amplifier UA741 is connected with a node between the light-emitting diode VD1 and the resistor R20.
5. The control circuit of oxygen supply tank for medical respiratory nursing as claimed in claim 4, wherein said alarm circuit comprises NE555, resistors R22-R23, capacitors C3-C4 and BZ1, wherein 1 pin of NE555 is grounded, 8 pins of NE555 are connected with +5V, 3 pins of NE555 are connected with BZ1, the other end of BZ1 is grounded, 5 pins of NE555 are connected with capacitor C4, the other end of capacitor C4 is grounded, resistor R22 is connected with resistor R23 and capacitor C3 in series, the other end of resistor R22 is connected with +5V, the other end of capacitor C3 is grounded, 2 pins of NE555 are connected with 6 pins in parallel and then connected with a node between resistor R23 and capacitor C3, and 7 pins of NE555 are connected with a node between resistor R22 and resistor R23.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020442714.9U CN213964704U (en) | 2020-03-31 | 2020-03-31 | Oxygen supply tank control circuit for respiratory medicine nursing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020442714.9U CN213964704U (en) | 2020-03-31 | 2020-03-31 | Oxygen supply tank control circuit for respiratory medicine nursing |
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| Publication Number | Publication Date |
|---|---|
| CN213964704U true CN213964704U (en) | 2021-08-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020442714.9U Expired - Fee Related CN213964704U (en) | 2020-03-31 | 2020-03-31 | Oxygen supply tank control circuit for respiratory medicine nursing |
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| Country | Link |
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| CN (1) | CN213964704U (en) |
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2020
- 2020-03-31 CN CN202020442714.9U patent/CN213964704U/en not_active Expired - Fee Related
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Granted publication date: 20210817 |