CN-121978159-A - Hydrogen analyzer and control method

Abstract

The invention discloses a hydrogen analyzer and a control method thereof, and the hydrogen analyzer comprises an analyzer main body, a sensor probe and a wire harness, wherein one end of the sensor probe is connected with the analyzer main body through the wire harness, an air inlet hole and an air outlet hole are formed in a port of the other end of the sensor probe, the sensor probe comprises an electromagnetic micro switch, the electromagnetic micro switch is fixedly arranged at the port of the sensor probe, an air inlet channel and an air outlet channel are formed in the electromagnetic micro switch, elastic diaphragms are arranged on the ports, close to the air inlet hole and the air outlet hole, of the air inlet channel and the air outlet channel, opening and closing of the elastic diaphragms are controlled by a control circuit, and a gas detection cavity is communicated with the air inlet channel and the air outlet channel and fixedly provided with a gas flow sensor and a thermal conductivity hydrogen sensor. The gas of the hydrogen analyzer passes through the electromagnetic micro switch and the gas flow sensor, so that the electromagnetic micro switch can be accurately controlled, and the purpose of controlling the gas flow rate is achieved.

Inventors

• CHEN LINGFEI
• FU GUOQIANG

Assignees

• 北京华荣达科技有限公司

Dates

Publication Date

20260505

Application Date

20260402

Claims (10)

1. 1. The utility model provides a hydrogen analyzer, includes analyzer main part, sensor probe and pencil, sensor probe one end pass through the pencil with the analyzer main part is connected, and the other end port is equipped with inlet port and venthole, its characterized in that, sensor probe includes: the electromagnetic micro switch is fixedly arranged at the port of the sensor probe, an air inlet channel and an air outlet channel are arranged in the electromagnetic micro switch, the air inlet channel is communicated with the air inlet hole, the air outlet channel is communicated with the air outlet hole, an elastic membrane is arranged at the port of one end, close to the air inlet hole, of the air inlet channel, and an elastic membrane is arranged at the port of one end, close to the air outlet hole, of the air outlet channel; The gas detection cavity is communicated with the gas inlet channel and the gas outlet channel, a gas flow sensor and a thermal conductivity hydrogen sensor are fixedly arranged in the gas detection cavity, and the gas flow sensor and the thermal conductivity hydrogen sensor are electrically connected with the control circuit.
2. 2. The hydrogen analyzer of claim 1, further comprising a sensor probe housing enclosing the electromagnetic micro-switch, control circuitry, and gas detection cavity within the housing.
3. 3. The hydrogen analyzer as claimed in claim 2, wherein the inlet and outlet channels are cylindrical and have a diameter Rt, and the elastic membrane is circular and has a diameter Rm, and Rm < Rt.
4. 4. A hydrogen analyzer according to claim 3, wherein two spiral electromagnetic coils are provided in the inlet and outlet channels, respectively.
5. 5. A hydrogen analyzer according to claim 3, wherein the elastic membrane is provided with a ring magnet on a side thereof remote from the inlet and outlet channels.
6. 6. A hydrogen analyzer in accordance with claim 4, wherein the two helical electromagnetic coils are wound in a uniform direction.
7. 7. A hydrogen analyzer according to claim 4, wherein a space is provided between one end of the spiral electromagnetic coil adjacent to the elastic membrane and the elastic membrane, and the space is in the range of 1mm to 3mm.
8. 8. A hydrogen analyzer according to claim 3, wherein the diameter of the inlet channel and the diameter Rt of the outlet channel are the same, and Rt is 0.5mm to 5.0mm.
9. 9. A control method of a hydrogen analyzer, characterized by comprising the steps of: the gas to be analyzed enters into a sensor probe air inlet hole of the hydrogen analyzer, and an air inlet channel of the electromagnetic micro switch is opened and communicated with the air inlet; after the gas to be analyzed enters, the gas flow sensor detects the flow velocity V of the gas to be analyzed, the flow velocity V is compared with a set standard flow velocity Vs, and when V is more than Vs, the control circuit controls the opening and closing of the elastic membrane at one end of the electromagnetic micro-switch air inlet channel to control the flow velocity V of the gas flow to be analyzed until V=Vs; When v=vs, the thermal conductivity hydrogen sensor starts to work, samples the gas to be analyzed, and the control circuit analyzes the sampled data to finally output the parameters of the hydrogen.
10. 10. The method according to claim 9, wherein when the control circuit controls the opening and closing of the elastic membrane at one end of the electromagnetic micro-switch air inlet channel, the control circuit simultaneously controls the opening and closing of the elastic membrane at one end of the electromagnetic micro-switch air outlet channel, wherein the opening and closing of the elastic membrane at one end of the electromagnetic micro-switch air outlet channel is equal to the opening and closing of the elastic membrane at one end of the electromagnetic micro-switch air inlet channel, so that the amount of the gas to be analyzed is identical to the amount of the gas to be analyzed.

Description

Hydrogen analyzer and control method Technical Field The invention relates to the technical field of gas detection and analysis, in particular to a hydrogen analyzer and a control method. Background The current industrial hydrogen analyzer is widely applied to the industries of semiconductors, chemical industry, environmental protection, petroleum refining and the like, covers the detection of hydrogen in a hydrogen-nitrogen conveying pipeline, an oxyhydrogen conveying pipeline and a hydrogen-argon conveying pipeline, and can ensure the normal production activity of factories and the life safety of operators. The online hydrogen analyzer is usually composed of a heat conduction pool, a signal transmission system and a shell, and utilizes the difference of the heat conductivity coefficients of hydrogen and mixed gas to detect the concentration of the hydrogen, the hydrogen analyzer is usually affected by temperature, humidity and gas flow rate, the temperature and the humidity can be compensated by a temperature and humidity sensor, but the gas flow rate compensation is complex, the electromagnetic valve controlled by the gas flow rate has a larger volume, the field portable detection and analysis are not facilitated, and due to the irregular change of the gas flow rate, the online hydrogen analyzer needs to be calibrated in real time according to the new gas flow rate when the external gas flow rate changes, and a plurality of inconveniences and difficulties exist in practical operation. In summary, it is necessary to provide an online hydrogen analyzer which is convenient to carry and does not require manual real-time calibration to solve the above technical problems. Disclosure of Invention Accordingly, the present invention is directed to a hydrogen analyzer and a control method thereof to solve the above-mentioned problems. The technical scheme of the invention is as follows: The utility model provides a hydrogen analyzer, includes analyzer main part, sensor probe and pencil, sensor probe one end pass through the pencil with the analyzer main part is connected, and the other end port is equipped with inlet port and venthole, its characterized in that, sensor probe includes: the electromagnetic micro switch is fixedly arranged at the port of the sensor probe, an air inlet channel and an air outlet channel are arranged in the electromagnetic micro switch, the air inlet channel is communicated with the air inlet hole, the air outlet channel is communicated with the air outlet hole, an elastic membrane is arranged at the port of one end, close to the air inlet hole, of the air inlet channel, and an elastic membrane is arranged at the port of one end, close to the air outlet hole, of the air outlet channel; The gas detection cavity is communicated with the gas inlet channel and the gas outlet channel, a gas flow sensor and a thermal conductivity hydrogen sensor are fixedly arranged in the gas detection cavity, and the gas flow sensor and the thermal conductivity hydrogen sensor are electrically connected with the control circuit. As one specific embodiment, the sensor probe further comprises a sensor probe shell, wherein the sensor probe shell surrounds the electromagnetic micro switch, the control circuit and the gas detection cavity inside the shell. In one specific embodiment, the air inlet channel and the air outlet channel are cylindrical, the diameter of the air inlet channel and the diameter of the air outlet channel are Rt, the elastic membrane is circular, the diameter of the elastic membrane is Rm, and Rm is smaller than Rt. As one specific embodiment, two spiral electromagnetic coils are respectively arranged in the air inlet channel and the air outlet channel. As one specific embodiment, a ring magnet is arranged on one side of the elastic membrane, which is far away from the air inlet channel and the air outlet channel. As one specific embodiment, the winding directions of the two spiral electromagnetic coils are consistent. As one specific implementation mode, a space is formed between one end, close to the elastic membrane, of the spiral electromagnetic coil and the elastic membrane, and the space is 1 mm-3 mm. As one specific embodiment, the diameter of the air inlet channel is the same as the diameter Rt of the air outlet channel, and Rt is 0.5 mm-5.0 mm. A control method of a hydrogen analyzer, characterized by comprising the steps of: the gas to be analyzed enters into a sensor probe air inlet hole of the hydrogen analyzer, and an air inlet channel of the electromagnetic micro switch is opened and communicated with the air inlet; after the gas to be analyzed enters, the gas flow sensor detects the flow velocity V of the gas to be analyzed, the flow velocity V is compared with a set standard flow velocity Vs, and when V is more than Vs, the control circuit controls the opening and closing of the elastic membrane at one end of the electromagnetic micro-switch air inlet channel to control the