CN207424721U - A kind of CO mixed gas flows control device - Google Patents

Abstract

The utility model discloses a CO mixed gas flow control device, comprising a gas channel and a control circuit; the gas channel includes a first electromagnetic valve, a second electromagnetic valve, a first flow valve, a second flow valve, a mixing device, a CO sensor and Gas pump; the control circuit includes a power supply unit, MCU, display unit, key unit and alarm unit; when working, the CO sensor is used to detect the concentration of CO in the CO mixed gas, and the detection result is sent to the MCU, and the MCU measures the CO mixed gas in real time The concentration of CO in the medium, the display unit displays the concentration setting range and current concentration value of CO, through the displayed current concentration value, manually adjust the first flow valve or the second flow valve, or manually adjust the first flow valve and the second flow valve The flow valve realizes the concentration control of CO in the CO mixed gas and the flow control of the CO mixed gas, so as to meet the needs of medical use.

Description

A CO mixed gas flow control device

technical field

The utility model relates to the field of gas flow control, in particular to a CO mixed gas flow control device.

Background technique

CO (carbon monoxide) is an important endogenous medium, which can be mixed with air or oxygen in a certain proportion to treat severe diseases such as neonatal persistent pulmonary hypertension and acute lung injury, but the current patent on the CO mixed gas flow control device less. Through the retrieval of relevant patents, there are currently some flow control system solutions for other gases.

In CN 200994398 Y, a _CO2 flow control system for a beverage mixer is described, which is mainly used to control the _CO2 flow in the beverage mixer. By setting flow meters and flow regulating valves on the primary carbonation pipeline and the secondary carbonation pipeline, the flow of _CO2 can be adjusted manually, or the flow of _CO2 can be controlled online through the flow regulating valve according to the flow detection signal of sugar water. To maintain the CO ₂ content within the beverage. This device does not use a gas sensor to measure the concentration of the mixed gas, so an accurate mixed concentration cannot be obtained.

In CN 203857272 U, an automatic switching control device for a _CO2 gas supply flowmeter is described. Including PLC controller, air supply control valve, air supply flow meter, air flow meter, several air supply branch pipes, several air supply branch pipes, and each air supply branch pipe is sequentially installed with a supply pipe corresponding to the air supply branch pipe. Air control valve and air supply flow meter. Each air branch pipe is equipped with an air flow meter corresponding to the air branch pipe. The air flow meter is connected to the PLC controller, and the PLC controller is connected to the air supply control valve. connected. The control device greatly improves the beer production efficiency, reduces labor intensity and improves measurement accuracy. But this patent is to control the flow of a single _CO2 gas, which is measured and controlled by a gas flow meter, and does not involve the mixing of multiple gases, nor does it involve the online measurement of the concentration.

Utility model content

The purpose of the utility model is to provide a CO mixed gas flow control device, which can realize the concentration control of CO and the flow control of the CO mixed gas, so as to meet the needs of medical use.

In order to solve the above technical problems, the utility model adopts the following technical solutions:

A CO mixed gas flow control device, including a gas channel and a control circuit;

The gas channel includes a first solenoid valve, a second solenoid valve, a first flow valve, a second flow valve, a mixing device, a CO sensor and an air pump. The first solenoid valve and the first flow valve are connected to the mixing device through pipelines in turn, and the second The second solenoid valve and the second flow valve are sequentially connected to the mixing device through pipelines. The input end of the first electromagnetic valve inputs CO standard gas, the input end of the second electromagnetic valve inputs air or oxygen, and the output end of the mixing device outputs CO mixed gas. , the detection output end of the mixing device is connected to the CO sensor through the pipeline, the output end of the CO sensor is connected to the input end of the air pump through the pipeline, and the output end of the air pump is the exhaust port;

The control circuit includes a power supply unit, an MCU, a display unit, a key unit and an alarm unit. The power supply unit provides working power for the entire device, and the output terminals of the MCU are electrically connected to the control terminals of the first solenoid valve, the second solenoid valve and the air pump, and The input terminals of the display unit and the alarm unit, the signal output terminal of the CO sensor are electrically connected to the CO concentration collection input terminal of the MCU, and the button unit is electrically connected to the input terminal of the MCU.

After adopting the above scheme, the CO mixed gas flow control device of the present invention detects the concentration of CO in the CO mixed gas by using the CO sensor, and transmits the detection result to the MCU, and the MCU measures the CO concentration in the CO mixed gas in real time. The display unit displays the concentration setting range of CO and the current concentration value. Through the displayed current concentration value, manually adjust the first flow valve or the second flow valve, or manually adjust the first flow valve and the second flow valve to realize the control of CO The concentration control and the flow control of CO mixed gas can meet the needs of medical use.

Description of drawings

Fig. 1 is a schematic diagram of the working principle of the utility model.

Detailed ways

In order to describe the technical content of the utility model more clearly, the following will be further described in conjunction with specific embodiments.

A CO mixed gas flow control device of the utility model includes a casing, a gas channel and a control circuit installed in the casing;

As shown in Figure 1, the gas passage includes a first solenoid valve 11, a second solenoid valve 12, a first flow valve 13, a second flow valve 14, a mixing device 15, a CO sensor 16 and an air pump 17, the first solenoid valve 11 and The first flow valve 13 is connected to the mixing device 15 through pipelines in turn, the second solenoid valve 12 and the second flow valve 14 are connected to the mixing device 15 through pipelines in turn, the input end of the first solenoid valve 11 is input with CO standard gas, the second The input end of the solenoid valve 12 inputs air or oxygen, the output end of the mixing device 15 outputs CO mixed gas, the detection output end of the mixing device 15 is connected to the CO sensor 16 through the pipeline, and the output end of the CO sensor 16 is connected to the air pump through the pipeline The input end of 17, the output end of air pump 17 is exhaust port.

The control circuit includes a power supply unit 21, an MCU 22, an OLED display 23, a key unit 24, and an audible and visual alarm unit 25, and the output ends of the MCU 22 are electrically connected to the control ends of the first electromagnetic valve 11, the second electromagnetic valve 12, and the air pump 17, respectively. , and the OLED display 23 and the input end of the sound and light alarm unit 25, the signal output end of the CO sensor 16 is electrically connected to the CO concentration collection input end of the MCU 22, and the button unit 24 is electrically connected to the input end of the MCU 22.

The first solenoid valve 11 is used for the intake control of CO standard gas, and the second solenoid valve 12 is used for the intake control of air or oxygen;

The first flow valve 13 is used to indicate the flow rate of the CO standard gas and manually control the flow rate of the CO standard gas;

The second flow valve 14 is used to indicate the flow of air or oxygen and manually control the flow of air or oxygen;

The mixing device 15 is used to realize the sufficient mixing of CO standard gas and air or oxygen;

The air pump 17 is used to extract a part of the gas from the mixing device 15 into the CO sensor 16 to measure the CO concentration;

The power supply unit 21 uses AC 220V mains to provide working power for the entire device after rectification and step-down;

MCU 22 is used to control the CO concentration data acquisition, display control, key unit control, solenoid valve and air pump control, sound and light alarm and other functions of the entire equipment;

The CO sensor 16 is used to measure the concentration of CO in the CO mixed gas;

The sound and light alarm indication of the sound and light alarm unit 25 is used to prompt the concentration of CO to exceed the set range;

The OLED display screen 23 is used to display the concentration of CO, and display the concentration setting range of CO;

The key unit 24 includes a start switch, an increment key, a decrement key and a confirmation key, which are respectively used for controlling the equipment and setting the CO concentration setting range.

The working principle of the utility model is as follows:

When working, CO standard gas and air or oxygen are stored in gas cylinders respectively. When the start switch of the key unit 24 is pressed, the MCU 22 controls the first electromagnetic valve 11, the second electromagnetic valve 12 and the air pump 17 respectively. The first electromagnetic valve The valve 11 and the second solenoid valve 12 are connected, the air pump 17 starts to work, the CO standard gas and air or oxygen enter the first solenoid valve 11 and the second solenoid valve 12 respectively through the pipeline, and flow into the first flow valve 13 and the second solenoid valve respectively. The two flow valves 14 flow together into the mixing device 15 for mixing to form a CO mixed gas, and a part of the CO mixed gas is extracted by the air pump 17 and enters the CO sensor 16, and the CO mixed gas is detected by the CO sensor 16 to detect the concentration of CO therein , and the detection result is sent to the MCU 22, and the current CO concentration value is displayed in real time through the OLED display 23, and the CO concentration range is also displayed on the OLED display 23. According to the displayed CO current concentration value, manually adjust the opening amount of the first flow valve 13 or the second flow valve 14, or manually adjust the opening amount of the first flow valve 13 and the second flow valve 14, to realize the control of CO in the CO mixed gas. The concentration control and the flow control of CO mixed gas can meet the needs of medical use.

When the MCU22 detects that the current concentration of CO is too high or too low, the current concentration value and the cause of the alarm (whether the concentration is too high or too low) can be visually seen from the OLED display 23, and the MCU22 outputs an alarm signal to the audible The light alarm unit 25 sends an audible and visual alarm signal to remind the staff by the sound and light alarm unit 25.

Claims (1)

1. A CO mixed gas flow control device, characterized in that: it includes a gas channel and a control circuit; The gas channel includes a first solenoid valve, a second solenoid valve, a first flow valve, a second flow valve, a mixing device, a CO sensor and an air pump. The first solenoid valve and the first flow valve are connected to the mixing device through pipelines in turn, and the second The second solenoid valve and the second flow valve are sequentially connected to the mixing device through pipelines. The input end of the first electromagnetic valve inputs CO standard gas, the input end of the second electromagnetic valve inputs air or oxygen, and the output end of the mixing device outputs CO mixed gas. , the detection output end of the mixing device is connected to the CO sensor through the pipeline, the output end of the CO sensor is connected to the input end of the air pump through the pipeline, and the output end of the air pump is the exhaust port; The control circuit includes a power supply unit, an MCU, a display unit, a key unit and an alarm unit. The power supply unit provides working power for the entire device, and the output terminals of the MCU are electrically connected to the control terminals of the first solenoid valve, the second solenoid valve and the air pump, and The input terminals of the display unit and the alarm unit, the signal output terminal of the CO sensor are electrically connected to the CO concentration collection input terminal of the MCU, and the button unit is electrically connected to the input terminal of the MCU.