Gas detection device

Abstract

The utility model discloses a gas detection device which is characterized in that a box body is internally divided into a control area, a reaction area and a gas inlet channel, the gas inlet channel is arranged at the lower part in the box body, and the control area and the reaction area are arranged above the gas inlet channel side by side; one end of the air inlet channel is provided with an air inlet, the other end is communicated with a reaction port arranged on the bottom wall of the reaction zone, and one side of the air inlet channel close to the air inlet is fixedly provided with a plurality of fans; a sensor plate is fixedly arranged on the top wall of the reaction area, and a plurality of reaction cabins are tightly attached and fixed below the sensor plate; a main control board is fixedly arranged in the control area, an MCU module and an analog quantity acquisition module connected with the MCU module are arranged on the main control board in an integrated mode, and the analog quantity acquisition module is connected with the sensor board. According to the utility model, the to-be-detected gas is actively accelerated to enter the reaction cabin for reaction, and the gas can be detected even if the concentration of the to-be-detected gas does not reach a detection threshold value, so that the detection sensitivity is improved, and the delay of gas detection is avoided.

Description

Technical Field

[0001] This utility model belongs to the field of gas detection, and specifically relates to a gas detection device. Background Technology

[0002] The statements in this section are merely background information relating to this disclosure and do not necessarily constitute prior art.

[0003] A gas detection device is a device that can sense a certain gas in the environment and detect its concentration. It can convert information about the type and concentration of a gas into an electrical signal. Based on the changes in the strength of the electrical signal, the relevant information about the gas being measured in the environment can be obtained.

[0004] In existing energy storage device testing, gas sensors experience a delay in taking action during the initial stage of gas accumulation due to the accumulation of the target gas. Most current gas sensors are passive contact gas sensors, triggering a reaction only when the target gas diffuses freely to a specific concentration threshold, resulting in a delay. Furthermore, for the same volume, this natural diffusion method is not sensitive enough for detecting lower gas concentrations. Utility Model Content

[0005] In order to solve the technical problems existing in the prior art, this utility model provides a gas detection device that can speed up the contact speed of the gas to be tested and avoid delays in gas detection.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] This utility model provides a gas detection device, including a housing, which is divided into a control area, a reaction area, and an air inlet. The air inlet is located in the lower part of the housing, and the control area and the reaction area are arranged side by side above the air inlet. One end of the air inlet has an air inlet, and the other end is connected to a reaction port on the bottom wall of the reaction area. Multiple fans are fixedly installed on the side of the air inlet near the air inlet. A sensor board is fixedly installed on the top wall of the reaction area, and multiple reaction chambers are fixedly attached to the bottom of the sensor board. A main control board is fixedly installed in the control area. The main control board integrates an MCU module and an analog signal acquisition module connected to it. The analog signal acquisition module is connected to the sensor board.

[0008] In a further technical solution, the fan is connected to the output end of the motor, and the motor is connected to the MCU module for control.

[0009] In a further technical solution, the MCU module is connected to the motor control via a drive circuit.

[0010] A further technical solution is that the reaction chamber has openings at both ends, with one end opening tightly attached to the sensor plate and the other end opening facing the bottom wall of the reaction zone.

[0011] In a further technical solution, the sensor board is connected to the analog signal acquisition module via a cable.

[0012] In a further technical solution, a cross-shaped partition frame is fixedly installed at certain intervals below the reaction chamber.

[0013] In a further technical solution, the bottom wall of the reaction zone is a gas equalization network.

[0014] A further technical solution is that an air inlet is provided on one side wall of the housing, and an air outlet is provided on the other adjacent side wall.

[0015] A further technical solution is that a display panel is fixedly installed on one side wall of the control area, and a main control board is fixedly installed on the other side wall. A display connection cable is fixedly installed on the upper part of one side of the main control board, and the display connection cable is connected to the display panel.

[0016] In a further technical solution, the main control board also integrates a communication module, a display module, a storage module, and a power module, which are connected to the MCU module respectively.

[0017] The beneficial effects of this utility model are:

[0018] This invention features multiple fans at the inlet of the gas detection device, which increases the flow rate of the gas to be tested within the inlet, allowing the gas to actively accelerate into the reaction chamber for reaction. Even if the concentration of the gas to be tested does not reach the detection threshold, the presence of the gas can still be detected, thus improving the sensitivity of the detection and avoiding delays in gas detection.

[0019] This invention features multiple fans at the inlet of the gas detection device, which increases the flow rate of the gas to be tested within the inlet. Compared to the natural flow rate, the gas to be tested flows through the reaction chamber at an accelerated speed, increasing the number of gas molecules that come into contact with the reaction materials within the chamber per unit time. At the same concentration of the gas to be tested, more molecules react with the materials within the chamber, generating a more obvious electrochemical reaction signal and improving the sensitivity of the detection. Attached Figure Description

[0020] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0021] Figure 1 This is an external structural diagram of the gas detection device according to an embodiment of the present invention;

[0022] Figure 2This is a right-side internal structural diagram of the gas detection device according to an embodiment of the present invention;

[0023] Figure 3 This is a left-side internal structural diagram of the gas detection device according to an embodiment of the present invention.

[0024] Among them, 1-shell, 2-air inlet, 3-air outlet, 4-fan, 5-button, 6-display board, 7-air inlet, 8-air distribution network, 9-reaction chamber, 10-sensor board, 11-main control board, 12-battery compartment, 13-display board connection cable. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0026] like Figure 1 , Figure 2 As shown, this utility model embodiment provides a gas detection device, including a housing, which is divided into a control area, a reaction area, and an air inlet 7. The air inlet 7 is located in the lower part of the housing, and the control area and the reaction area are arranged side by side above the air inlet 7. One end of the air inlet 7 has an air inlet 2, and the other end is connected to a reaction port opened on the bottom wall of the reaction area. Multiple fans 4 are fixedly installed on the side of the air inlet 7 near the air inlet 2. A sensor board 10 is fixedly installed on the top wall of the reaction area, and multiple reaction chambers 9 are fixedly attached to the bottom of the sensor board 10. A main control board 11 is fixedly installed in the control area. The main control board 11 integrates an MCU module and an analog quantity acquisition module connected to it. The analog quantity acquisition module is connected to the sensor board 10.

[0027] In this embodiment, as Figure 2 , 3 As shown, the gas detection device is rectangular in shape, with a rectangular housing. One side wall of the housing 1 has a display panel 6, a button 5, and an air inlet 2 arranged sequentially from top to bottom. An air outlet 3 is located on the upper part of the other adjacent side wall. The housing 1 is made of engineering plastic, providing the main structural support and gas passage. The button 5 is connected to the display panel and is used to start / stop the device and set some parameters.

[0028] The chamber's interior comprises a control zone, a reaction zone, and an air inlet duct 7. The air inlet duct 7 is located in the lower part of the chamber, with the control zone and reaction zone positioned side-by-side above it. In other words, the chamber's internal space is divided into three areas: the control zone, the reaction zone, and the air inlet duct. The control zone and reaction zone are positioned above the air inlet duct to facilitate the flow of gas from the inlet duct into the reaction zone. A reaction port is located on the bottom wall of the reaction zone. One end of the air inlet duct connects to the air inlet, and the other end connects to the reaction port on the upper wall. This means the external environment and the reaction zone are connected through the air inlet duct, providing a flow path for the gas to be measured.

[0029] Multiple fans 4 are fixedly installed on the side of the air intake duct 7 near the air intake port 2. The fans 4 are connected to the output end of the motor. The motor drives the fans to rotate, thereby accelerating the gas flow rate and providing a certain pressure to enter the reaction zone.

[0030] Furthermore, the motor is powered by a battery through a power module, with its input connected to the output of the power module in the control area via wires passing through the bottom wall. The motor has a built-in motor drive circuit, and the MCU module connects to the motor's input through this drive circuit. Specifically, the MCU module's I / O ports are connected to the input of the drive circuit via wires, and the output of the drive circuit is connected to the motor's input to transmit control signals. Since the MCU module's output signal cannot directly drive the motor, a drive circuit is needed to amplify the MCU module's output signal, converting the weak electrical control signal from the MCU module into a strong electrical control signal capable of driving the motor. The MCU module controls the motor's start and stop through the drive circuit. When starting or stopping the motor, the MCU sends the corresponding control signal to the drive circuit, which then starts or stops the motor based on the received control signal.

[0031] In some implementations, the MCU module can be an STM32F403, and the motor can be a brushless DC motor. The selection of the corresponding equipment model can be flexibly chosen according to the actual needs of the gas detection device and the space involved; this embodiment does not impose specific limitations.

[0032] In some implementations, the number of fans is set to two, and the number of fans is the same as the number of motors, with each fan connected accordingly.

[0033] In some implementations, the drive circuit can achieve the corresponding functions using existing motor drive circuits, mainly by amplifying the power of the control signal and driving the motor.

[0034] In this embodiment, a reaction port is provided on the bottom wall of the reaction zone, and a sensor plate 10 is fixedly installed on the top wall. Multiple reaction chambers 9 are fixedly attached to the bottom of the sensor plate 10. Each reaction chamber 9 has openings at both ends; one opening is flush with the sensor plate 10, and the other opening faces the bottom wall of the reaction zone. The bottom wall of the reaction zone is a gas equalization network. The gas to be tested enters each reaction chamber 9 through the gas equalization network. When the gas to be tested comes into contact with the reaction materials in the reaction chamber 9, an electrochemical reaction occurs, generating a weak electrical signal. The sensor plate 10 is connected to an analog signal acquisition module integrated on the main control board 11 via a cable. The sensor plate 10 collects the weak signal and transmits it to the analog signal acquisition module on the main control board 11 via the cable. The analog signal acquisition module receives the analog data, i.e., the weak electrical signal generated by the electrochemical reaction in the reaction chamber.

[0035] Each reaction chamber contains built-in reactive materials that can undergo an electrochemical reaction with the target gas to generate a weakness signal. This device allows for the direct replacement of reactive materials by changing the reaction chamber, enabling the measurement of carbon dioxide, oxygen, carbon monoxide, nitrogen oxides, hydrogen, and other gases. Different reaction chambers can be used to achieve the target gas, making it unrestricted and allowing for flexible configuration based on actual needs.

[0036] The bottom wall of the reaction zone is a gas equalization mesh 8 (permeable mesh plate), which consists of multiple evenly distributed holes. On the one hand, it ensures the uniform distribution of the gas to be tested in the airflow in this area; on the other hand, the design of the gas equalization mesh not only allows for air permeability, but also effectively blocks larger particles or objects from entering the reaction chamber, thereby protecting the reaction materials inside the chamber from contamination.

[0037] A cross-shaped partition frame is fixedly installed at certain intervals below the reaction chamber 9, dividing the space below the reaction chamber 9 into multiple areas, each corresponding to a specific area of ​​the reaction chamber 9. The cross-shaped partition frame increases the mixing of the target gas in the airflow within that area, causing the airflow to enter a turbulent mode and improving detection efficiency.

[0038] In some implementations, the reaction chamber is fixed to the sensor plate using fasteners such as bolts, nuts, and washers, or by welding, adhesives, etc. The choice can be flexible and not specifically limited, depending on the actual situation. Similarly, the cross-shaped partition frame is fixed to the side wall of the reaction zone using fasteners such as bolts and nuts, or by welding, snap-fitting, etc. The choice can be flexible and not specifically limited, depending on the actual situation.

[0039] In this embodiment, a display panel 6 is fixedly installed on one side wall of the control area, and a main control board 11 is fixedly installed on the other side wall. A display connection cable (3SZ cable) is fixedly installed on the upper part of one side of the main control board 11, and the display connection cable is connected to the display panel 6. A battery compartment 12 is fixedly installed between the display panel 6 and the main control board 11, and a battery power supply is installed in the battery compartment 12.

[0040] Since the battery voltage itself does not meet the voltage requirements of other modules in the device, the battery power supply is connected to the power module integrated on the main control board, and supplies power to each module after adjustment by the power module.

[0041] The display panel shows the specific concentration value of the gas being tested and the alarm. The alarm is triggered by changing the red color of the LED screen and using a buzzer. The buzzer is located on the main control board and connected to the MCU module. When the detected gas concentration parameter reaches a set threshold, the MCU module sends an alarm signal to the buzzer, triggering the alarm.

[0042] In some implementations, the display panel is implemented using an LED display screen.

[0043] The main control board 11 is responsible for acquiring signals from each reaction chamber 9, processing them, and then sending them to the display board 6. The main control board 11 integrates an MCU module, an analog signal acquisition module, a communication module, a display module, a storage module, and a power supply module. The MCU module is connected to each of these modules. Specifically, the MCU module connects to the analog signal acquisition module via an SPI bus, to the communication module via a serial bus, and to the display module via an I2C bus. The power supply module's output is connected to the MCU module, and its input is connected to the output of the battery power supply in the battery compartment, used to adjust the battery power supply output and output the operating voltage of the chips on the main control board.

[0044] The output of the power module is also connected to the analog acquisition module, communication module, display module, and storage module, while the input of the power module is connected to the battery power supply to power each module.

[0045] The analog signal acquisition module includes a multi-stage power amplifier circuit. The weak electrical signal generated by the chemical reaction has very low power and needs to be amplified before analog acquisition. Using existing multi-stage power amplifier circuits is sufficient to achieve signal power amplification.

[0046] In some implementations, each module integrated on the main control board corresponds to its own main IC. The main IC of the MCU module is STM32F403, the IC of the analog signal acquisition module is ADC0808, the communication module is ESP32, the storage module is W25Q64FWB, the display module is SG1621, and the power management module is TPS54315P.

[0047] Working principle:

[0048] The analog acquisition module reads the current analog data in the reaction chamber and transmits it to the MCU module. The MCU module determines the initial state of the gas to be tested based on the current analog data, displays the concentration on the display panel, and enters the normal monitoring and detection state. In this state, the MCU module sends a command to the drive circuit to start the motor. The motor drives the fan to a certain speed, increasing the flow rate in the air intake and continuously passing through the reaction chamber. Compared with the state under natural flow rate, the accelerated flow of gas through the reaction chamber increases the number of gas molecules to be tested that come into contact with the reaction materials in the chamber per unit time. At the same concentration of the gas to be tested, more molecules react with the materials in the chamber, generating a more obvious weak electrical signal. The analog acquisition module receives this weak signal and transmits it to the MCU module. The MCU module receives the analog data and determines the gas concentration based on the correspondence between the signal and the concentration. When the gas concentration reaches different set thresholds, different alarms will be triggered, and the corresponding concentration will be displayed on the display panel.

[0049] Although the specific embodiments of the present utility model have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present utility model. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solution of the present utility model are still within the scope of protection of the present utility model.

Claims

1. A gas detection device, characterized in that: The device includes a housing, which is divided into a control area, a reaction area, and an air intake duct. The air intake duct is located in the lower part of the housing, and the control area and the reaction area are arranged side by side above the air intake duct. One end of the air intake duct has an air inlet, and the other end is connected to a reaction port on the bottom wall of the reaction area. Multiple fans are fixedly installed on the side of the air intake duct near the air inlet. A sensor board is fixedly installed on the top wall of the reaction area, and multiple reaction chambers are fixedly attached to the bottom of the sensor board. A main control board is fixedly installed in the control area. The main control board integrates an MCU module and an analog signal acquisition module connected to it. The analog signal acquisition module is connected to the sensor board.

2. The gas detection device as described in claim 1, characterized in that: The fan is connected to the output of the motor, and the motor is connected to the MCU module for control.

3. The gas detection device as described in claim 2, characterized in that: The MCU module is connected to the motor control via a drive circuit.

4. The gas detection device as described in claim 1, characterized in that: The reaction chamber has openings at both ends, with one end tightly attached to the sensor plate and the other end facing the bottom wall of the reaction zone.

5. A gas detection device as described in claim 1, characterized in that: The sensor board is connected to the analog signal acquisition module via a cable.

6. A gas detection device as described in claim 1, characterized in that: A cross-shaped partition frame is also fixed at certain intervals below the reaction chamber.

7. A gas detection device as described in claim 1, characterized in that: The bottom wall of the reaction zone is a gas equalization network.

8. A gas detection device as described in claim 1, characterized in that: An air inlet is provided on one side wall of the outer casing, and an air outlet is provided on the other adjacent side wall.

9. A gas detection device as described in claim 1, characterized in that: A display panel is fixedly installed on one side wall of the control area, and a main control board is fixedly installed on the other side wall. A display connection cable is fixedly installed on the upper part of one side of the main control board, and the display connection cable is connected to the display panel.

10. A gas detection device as described in claim 9, characterized in that: The main control board also integrates a communication module, a display module, a storage module, and a power module, which are connected to the MCU module respectively.

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