Gas source treatment valve group HO-C01 for medical oxygen generators.
Medical oxygen concentrator gas source treatment valve group HO-C01
Introduction to working principle
1.Structure Introduction.
2. Intake: High-pressure area
When the intake valve group is connected to high-pressure gas, the position of the red line is the high-pressure area. The arrows indicate the direction.
3. Initial pressure state of control area
When the valve group is in the startup state, two solenoid valves are opened and both gas paths have gas input. This process is a stamping process. Both molecular sieves are pressurized to ensure efficiency.
There are key components in the control chamber: preloading spring and diaphragm. The preloading spring plays a role in returning when the solenoid valve is not started. That is, when the solenoid valve is not turned on, the intake air directly reaches the molecular sieve. The diaphragm will adjust the position of the valve stem according to the change of air pressure at both ends, thereby realizing the process of converting electrical signals into pneumatic signals. In the figure, the red area is the high-pressure area. The pressure in the yellow area is less than that in the red area. The green arrow is the direction of air flow, and air enters the molecular sieve.
When two solenoid valves are closed at the same time, both molecular sieves are inflated simultaneously.
4. Signal is given to control valve 1 alone.
When the air pressure reaches a certain value, solenoid valve 1 is opened and gas is supplied by gas path 2 alone.
When solenoid valve 1 is opened, the control chamber is connected to the gas source, and control chamber 1 forms a high-pressure chamber. The pressure will push the valve stem to move towards the high-pressure chamber and block the channel for high-pressure gas to enter molecular sieve 1. Molecular sieve 1 exhausts. In the figure, the red arrow is the direction of high-pressure gas, and the green arrow is the direction of air flow. Due to the reduction of green air flow, the pressure in the yellow area is less than that in the red area. The other two molecular sieves are connected by purge holes. The compressed gas from molecular sieve 2 will perform purge and regeneration on molecular sieve 1.
When solenoid valve 1 is opened and solenoid valve 2 is closed, molecular sieve 2 is pressurized for oxygen production, and molecular sieve 1 is exhausted and regenerated.
5. Pressure equalization, preparing for switching.
When molecular sieve 2 is close to saturation, two solenoid valves are closed. Both gas paths have gas input and the pressure of molecular sieve 2 is quickly transferred to molecular sieve 1 until the pressures of the two molecular sieves are equal. This process is a stamping process. Molecular sieve 1 is quickly pressurized to ensure efficiency.
In the figure, the green arrow is the direction of air flow. Since the solenoid valve is closed, the yellow area is connected to the atmosphere. The valve stem moves to the side of the control chamber. The diaphragm blocks the air inlet of the exhaust chamber. Air enters the molecular sieve. During the opening process, the two molecular sieves are connected by the valve group. The pressure of molecular sieve 2 is rapidly transferred to molecular sieve 1 until the pressures of the two molecular sieves are balanced.
When two solenoid valves are closed at the same time, both molecular sieves are inflated simultaneously.
6. Signal is given to control valve 2 alone.
When the air pressure reaches a certain value, solenoid valve 2 is opened and gas is supplied by gas path 1 alone.
When solenoid valve 2 is opened, the control chamber is connected to the gas source, and control chamber 2 forms a high-pressure chamber. The pressure will push the valve stem to move towards the high-pressure chamber and block the channel for high-pressure gas to enter molecular sieve 2. Molecular sieve 2 exhausts. In the figure, the red arrow is the direction of high-pressure gas, and the green arrow is the direction of air flow. Due to the reduction of green air flow, the pressure in the yellow area is less than that in the red area. The other two molecular sieves are connected by purge holes. The compressed gas from molecular sieve 1 will perform purge and regeneration on molecular sieve 2.
When solenoid valve 2 is opened and solenoid valve 1 is closed, molecular sieve 1 is pressurized for oxygen production, and molecular sieve 2 is exhausted and regenerated.
7. Pressure equalization, preparing for switching.
When molecular sieve 1 is close to saturation, two solenoid valves are closed. Both gas paths have gas input and the pressure of molecular sieve 1 is quickly transferred to molecular sieve 2 until the pressures of the two molecular sieves are equal. This process is a stamping process. Molecular sieve 2 is quickly pressurized to ensure efficiency.
In the figure, the green arrow is the direction of air flow. Since the solenoid valve is closed, the yellow area is connected to the atmosphere. The valve stem moves to the side of the control chamber. The diaphragm blocks the air inlet of the exhaust chamber. Air enters the molecular sieve. During the opening process, the two molecular sieves are connected by the valve group. The pressure of molecular sieve 1 is rapidly transferred to molecular sieve 2 until the pressures of the two molecular sieves are balanced.
When two solenoid valves are closed at the same time, both molecular sieves are inflated simultaneously.
8. The two molecular sieves are regenerated in a cycle, and the oxygen generator works normally.
Taking the above regeneration process as a unit and continuously repeating the oxygen production and regeneration cycle forms a benign closed-loop operation, which can supply oxygen continuously for a long time.
In the figure, the blue arrow indicates the direction of exhaust air flow. After being discharged from the molecular sieve, it is uniformly discharged from the valve group through the exhaust interface. Both the air inlet and the exhaust port have two directions to choose from, which is convenient for customers to install the machine.
