Detailed introduction and principle of oxygen concentrator
The use and supply of medical oxygen in hospitals has long been a cumbersome process. The difficulty of transporting heavy duty oxygen cylinders, the small capacity of oxygen cylinders, and the need to replace cylinders for long periods of time make it difficult to provide a stable pressure and output over time. . All these have brought a lot of inconvenience to hospitals and patients. Nowadays, many medical places use centralized oxygen supply system, which concentrates the gas source in one place, which is not only convenient to use, but also stable for a long time, greatly reducing the risk of oxygen use, safe and reliable. It can be used in wards, operating rooms, hyperbaric oxygen chambers, etc. Now let YIYI oxygen machine sales consultant Xiaobian introduce you the working principle and details of oxygen machine.
1 System principle
The oxygen supply system of medical center generally adopts liquid oxygen tank as the gas source. Liquid oxygen is converted into oxygen through vaporization device and input into gas terminal through special pipeline. It is usually equipped with a belt. The treatment belt is equipped with a sealed socket for quick insertion. The gas is supplied by inserting gas equipment (oxygen humidifier, ventilator, etc.).
2 System composition
Medical center oxygen supply system consists of gas source, vaporizer, control device, oxygen supply pipeline, oxygen terminal and alarm device.
The gas source is generally a liquid oxygen tank, consisting of several oxygen cylinders as a backup gas source, and the quality of oxygen must meet the national standard.
Vaporizer: Generally use room temperature vaporizer. The gas temperature vaporizer uses the natural convection of air to absorb the heat energy in the air, heats the liquid oxygen in the heat pipe and makes the liquid oxygen evaporate completely into gaseous oxygen. This kind of evaporator is widely used for its high efficiency and energy saving.
The control device includes switching device, valve, pressure reduction, pressure stabilization device and pressure gauge, pressure alarm, etc.
Pressure reducing device: Since the oxygen pressure in the pipeline directly from the gasifier (usually 0.6 to 1.0mpa) is higher than the actual oxygen pressure required in most sectors (usually 0.35 to 0.6mpa), oxygen reaches various locations through the oxygen supply pipeline. After the section, a pressure reduction device is required to reduce the pressure to meet the actual use.
The oxygen supply pipeline is transported from the outlet of the control device to each use end through pipes, usually made of copper, aluminum or stainless steel pipes.
The terminals are generally connected to the equipment belt. The equipment belt is equipped with oxygen insertion type self-sealing quick connectors. The connector can be connected to oxygen humidifier, respirator, etc. It is convenient, fast and diversified.
Mobile terminals are used by connecting pipes with hoses. It can be moved freely in the room and is suitable for operating room, icu, nicu, etc.
There are two types of hanging tower terminals, lift type and fixed type. They are generally suspended on the roof and equipped with various gas sources such as oxygen and anesthesia gas, as well as various power connections. It is suitable for operating room, icu, nicu, etc.
The regulating gas dispenser can digitally adjust the pressure and flow of medical gases, and is also suitable for operating rooms, icu, nicu, etc.
It can also be used for hyperbaric oxygen chamber through pipeline connection.
4 Alarm device
The alarm device is installed in the place where there is a duty officer on duty for 24 hours. When the oxygen pressure value of the central oxygen supply system is lower than the set value or too high, an alarm signal will be issued for timely adjustment.
In modern society, the level of medical services is improving, and many medical departments are equipped with negative pressure suction devices. Negative pressure suction device is divided into traditional electric suction device and centralized control suction device. Compared with the disadvantages of traditional electric suction device which is noisy and takes up a lot of space around the patient, the centralized control of the suction device makes use of the equipment belt and the central suction station. With its advantages of compactness, convenience, low noise, and centralized intelligence, it has become the inevitable future development. Trend. The device is simple, safe and reliable in operation, and can be used continuously for 24 hours in each ward. It overcomes the shortcomings of electric suction machine which needs to be moved randomly, cannot be shared by many people and is inconvenient to disinfection. Does not occupy ward space, no noise. It is the modern ideal amusement facility system equipment.
4.1 System principle medical negative pressure suction system adopts vacuum pump set as the negative pressure source, and the whole negative pressure pipeline reaches the required negative pressure through mechanical rotation suction. Negative suction force is generated at the end of use, and the continuous negative atmospheric pressure will suck the head to the external material to squeeze inward and absorb various pollutants and medical waste gas in the patient's body, so as to achieve the medical effect.
4.2 System composition The negative pressure suction system is generally composed of four parts: central suction station, air transmission pipeline, monitoring and alarm device and end suction equipment. The central suction station is generally located in an independent machine room and consists of a set of water ring vacuum pump, vacuum tank, negative pressure instrument, medical vacuum container, water tank, sterilization filter, sewage tank and electric control cabinet. Air pipeline consists of suction trunk line, instrument valve box, floor supervisor, branch pipe, service valve, branch pipe, flow control valve, suction terminal, etc.; attraction equipment is negative pressure attraction bottle; monitoring and alarm device consists of electric contact vacuum meter, alarm device, information panel and other components.
Through the manual or automatic control of the electric control cabinet, the vacuum pump is coordinated to work, so as to control its production of the required negative pressure value, which acts on the patient through the pipeline and terminal device.
4.3 Terminals Terminals are generally connected by equipment belts. The device belt is equipped with a negative pressure insertion type self-sealing quick connector. The connector can be connected to catheters, electric suction devices and other suction devices, which are convenient and diverse to use.
4.4 Safe negative pressure interval and control The actual negative pressure value is too small to achieve the medical effect; too large, it is easy to cause injury to patients or even endanger their lives. The general vacuum of the negative pressure system fluctuates within the range of 0.04mpa to 0.67mpa, which is most suitable for the use of our medical system.
The central suction station is equipped with an automatic device. When the electric control cabinet is in automatic mode, the work of the vacuum pump set is determined according to the relationship between the negative pressure meter value and the set value at that time, and the actual negative pressure value is adjusted automatically.
When the actual negative pressure value is lower than the lower limit of the set negative pressure value, the vacuum pumping unit is started to generate negative pressure, so that the actual negative pressure value of the whole system increases.
When the actual negative pressure value is higher than the upper limit of the set negative pressure value, the vacuum pump unit is powered off. Due to the normal trace leakage of the system and hospital use, the actual negative pressure value decreases slowly, so that the actual negative pressure value is controlled within the safe and effective range to ensure the normal use of the system.
And there is an alarm device. When the negative pressure in the station is lower than -400mmhg or higher than -670mmhg, the alarm box can automatically issue an acoustic and optical alarm to remind the duty personnel to take corresponding measures in time.