CCN counter airflow control system with high-precision flow regulation function

Abstract

The utility model relates to the technical field of atmospheric science detection equipment, in particular to a CCN counter airflow control system with a high-precision flow regulation function, which comprises a high-precision flow regulation valve, a cloud condensation nucleus counter, an optical particle counter, an air storage bottle and an exhaust bottle. Compared with the prior art, the device has the advantages that the condensation nucleus counter, the optical particle counter and the high-precision flow regulating valve are arranged, so that the air inlet flow can be quickly changed, different supersaturation degrees can be generated, the measurement period is shortened, meanwhile, the advanced flow regulating technology and the flow stabilizing device are adopted, the stability and the uniformity of airflow are ensured, and the measurement accuracy is improved. The control device is electrically connected with the flow sensor and the temperature and pressure compensation module, so that the control system can quickly change the air inlet flow, the response time is shortened to the second level, and compared with a traditional method, the measurement speed is greatly increased, and the cloud condensation nucleus number concentration measurement is more accurate; and more reliable data support is provided for atmospheric scientific research.

Description

Technical Field

[0001] This utility model relates to the field of atmospheric science detection equipment technology, and in particular to a CCN counter airflow control system with high-precision flow regulation function. Background Technology

[0002] The cloud condensation nucleus counter (CCN) is a key instrument for measuring the ability of aerosol particles to activate into cloud condensation nuclei and is widely used in atmospheric science research. Traditional CCN counters typically generate supersaturation by altering the temperature difference between the top and bottom of the cloud chamber; however, this method has a long response time, making rapid measurement difficult. Furthermore, existing equipment suffers from insufficient accuracy in flow control and poor airflow stability, affecting the accuracy and efficiency of measurements. Therefore, developing a CCN counter airflow control system capable of rapid response and high-precision flow regulation is of great significance. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a CCN counter airflow control system with high-precision flow regulation function, which effectively solves the deficiencies of the prior art.

[0004] To achieve the above objectives, one embodiment of the present invention provides a CCN counter airflow control system with high-precision flow regulation function, including a high-precision flow regulation valve, a cloud condensation nucleus counter, an optical particle counter, a gas storage cylinder, and an exhaust cylinder.

[0005] An intake manifold, a metering valve, a filter, and a humidifier are sequentially installed between the high-precision flow regulating valve and the cloud condensation nucleus counter. A flow stabilizing device, a control device, a flow sensor, and a temperature and pressure compensation module are sequentially installed between the intake manifold and the cloud condensation nucleus counter.

[0006] The intake manifold is connected to the gas storage cylinder and the exhaust cylinder via a pipeline, and electromagnetic pumps are installed between the gas storage cylinder and the exhaust cylinder and the cloud condensation nucleus counter and the optical particle counter.

[0007] Preferably, in any of the above schemes, the high-precision flow regulating valve is installed on the air inlet pipe of the cloud condensation nucleus counter, and the flow rate is precisely regulated by electric or pneumatic means.

[0008] Preferably, in any of the above schemes, the flow stabilizing device includes a pressure stabilizing tank and a flow damper to ensure the stability and uniformity of the airflow, and the control device is controlled by a microprocessor to automatically adjust the opening of the flow regulating valve according to preset parameters.

[0009] Preferably, one side of the optical particle counter is equipped with a hydrophobic valve, and an electromagnetic pump and a filter dryer are sequentially installed on one side of the hydrophobic valve. One side of the filter dryer is connected to the optical particle counter.

[0010] Preferably, in any of the above solutions, the flow sensor is used to monitor the flow rate in real time and provide feedback signals to the control device, and the temperature and pressure compensation module is electrically connected to the control device to compensate for changes in ambient temperature and pressure.

[0011] Preferably, in any of the above schemes, a cooler, a proportional valve, and an air pump are sequentially installed on the side of the optical particle counter away from the cloud condensation nucleus counter, and an electromagnetic pump is installed between the cooler and the exhaust bottle.

[0012] This utility model has the following advantages:

[0013] This high-precision CCN counter airflow control system incorporates a condensation nucleus counter and an optical particle counter, with an intake manifold, flow stabilization device, control device, flow sensor, and temperature and pressure compensation module sequentially installed between them. By employing a high-precision flow control valve, the system can rapidly alter the intake flow rate to generate varying supersaturation levels, thereby shortening the measurement cycle. Advanced flow control technology and the flow stabilization device ensure airflow stability and uniformity, improving measurement accuracy. The control device is electrically connected to the flow sensor and temperature and pressure compensation module, enabling the system to quickly change the intake flow rate with a response time reduced to the second level. Compared to traditional methods, this significantly improves measurement speed, making cloud condensation nucleus number concentration measurements more accurate and providing more reliable data support for atmospheric science research. Attached Figure Description

[0014] Figure 1 This is a system schematic diagram of the present invention. Detailed Implementation

[0015] The present invention will be further described below with reference to the accompanying drawings, but the scope of protection of the present invention is not limited to the following description.

[0016] like Figure 1As shown, a CCN counter airflow control system with high-precision flow regulation function includes a high-precision flow regulating valve, a cloud condensation nucleus counter, an optical particle counter, a gas storage cylinder, and an exhaust cylinder. An intake manifold, a metering valve, a filter, and a humidifier are sequentially installed between the high-precision flow regulating valve and the cloud condensation nucleus counter. A flow stabilizing device, a control device, a flow sensor, and a temperature and pressure compensation module are sequentially installed between the intake manifold and the cloud condensation nucleus counter. The intake manifold is connected to the gas storage cylinder and the exhaust cylinder via pipelines. Electromagnetic pumps are installed between the gas storage cylinder and the cloud condensation nucleus counter and the optical particle counter. After the system starts, the sensors monitor the airflow and pressure in real time and feed the data back to the controller. The controller automatically adjusts the opening of the flow regulating valve according to preset values ​​to ensure precise control of the airflow. The flow stabilizing device stabilizes the airflow before it enters the cloud chamber to ensure airflow uniformity. The cloud condensation nucleus counter rapidly generates supersaturation based on the adjusted airflow rate and measures the cloud condensation nucleus number concentration. The system design of this invention is compact, with each component working collaboratively to achieve a highly integrated airflow control solution. It is easy to install and maintain. The system design takes into account the ease of user operation, reducing the difficulty of operation and the workload of maintenance through an intuitive control interface and an automated compensation mechanism.

[0017] A high-precision flow regulating valve is installed on the inlet pipe of the cloud condensation nucleus counter. It precisely regulates the flow rate via electric or pneumatic means. As an optional technical solution of this invention, the high-precision flow regulating valve is electrically connected to a control device. The control device employs a microprocessor. The cloud condensation nucleus counter (CNN) uses continuous flow thermal gradient cloud chamber technology to establish a temperature gradient within a sealed cavity, creating a supersaturated water vapor environment (supersaturation range 0.05%–2.0%). This promotes the hygroscopic activation and condensation of aerosol particles into droplets. After entering the cloud chamber, the aerosol particles undergo a phase change under supersaturated conditions. Hygroscopic particles (such as sulfates and nitric acid)... Salt preferentially activates droplets to form them. The optical particle counter (OPC) uses laser scattering technology to detect the droplet size distribution (0.75-10μm) in real time. Combined with counting logic, it calculates the concentration of activated particles. The built-in timer / counter module (such as CC2530 chip) realizes sampling frequency control (1Hz) and pulse signal frequency division processing to ensure data synchronization. At the same time, it uses a programmable counter chip to realize multi-channel counting, frequency division and mode switching (such as free run / mode). It is equipped with an external RS485 or CAN bus interface to support real-time data transmission to the host computer, which is suitable for laboratory and field observation needs.

[0018] The flow stabilization device includes a pressure stabilizing tank and a flow damper to ensure the stability and uniformity of the airflow. The control device is microprocessor-controlled and automatically adjusts the opening of the flow regulating valve according to preset parameters. As an optional technical solution of this utility model, this facilitates ensuring that aerosol samples pass through the cloud chamber of the cloud condensation nucleus counter at a constant flow rate, reducing particle loss and flow disturbance. This control system is not only suitable for atmospheric science research, but also has broad application potential and is of great significance for promoting scientific and technological progress in related fields.

[0019] A condensate drain valve is installed on one side of the optical particle counter. An electromagnetic pump and a filter dryer are sequentially installed on the other side of the condensate drain valve. The filter dryer is connected to the optical particle counter. A flow sensor monitors the flow rate in real time and provides feedback signals to the control device. A temperature and pressure compensation module is electrically connected to the control device and compensates for changes in ambient temperature and pressure. As an optional technical solution of this invention, the temperature and pressure compensation module monitors the parameters of the working environment in real time. Simultaneously, the control device processes the signals uploaded by the temperature and pressure compensation module and sends control signals to the high-precision flow regulating valve to automatically adjust the relevant parameters of the high-precision flow regulating valve, ensuring the accuracy and stability of the flow rate. It can also quickly change the intake flow rate to generate different supersaturations. The temperature and pressure compensation module ensures the uniformity of the airflow and reduces measurement errors.

[0020] A cooler, a proportional valve, and an air pump are sequentially installed on the side of the optical particle counter away from the cloud condensation nucleus counter. An electromagnetic pump is installed between the cooler and the exhaust bottle. As an optional technology of this utility model, the air pump facilitates the extraction of gas, while the cooler facilitates the cooling of the flowing gas. At the same time, the proportional valve controls the pressure and flow rate of the exhaust gas, and the gas is discharged after the measurement is completed.

[0021] This CCN counter airflow control system with high-precision flow regulation function requires the following steps to use:

[0022] 1) Flow regulation: The control device automatically adjusts the opening of the flow regulating valve according to the preset flow value and the signal fed back by the flow sensor to achieve precise flow control.

[0023] 2) Flow stabilization control: The flow stabilization device buffers the airflow, reduces flow fluctuations, and ensures the stability and uniformity of the airflow.

[0024] 3) Supersaturation control: By changing the air intake flow rate, the control device can quickly generate different supersaturations to achieve rapid measurement of cloud condensation nucleus concentration.

[0025] 4) Compensation mechanism: The temperature and pressure compensation module monitors environmental parameters in real time and automatically adjusts the parameters of the flow regulating valve to ensure the accuracy and stability of the flow.

[0026] In summary, when using this system, users can set up a condensation nucleus counter and an optical particle counter, with an intake manifold, flow stabilization device, control device, flow sensor, and temperature and pressure compensation module installed sequentially between them. A high-precision flow regulating valve allows for rapid changes in the intake flow rate, generating different supersaturations and shortening the measurement cycle. Advanced flow regulation technology and the flow stabilization device ensure airflow stability and uniformity, improving measurement accuracy. The control device is electrically connected to the flow sensor and temperature and pressure compensation module, enabling the control system to rapidly change the intake flow rate with a response time reduced to the second level. Compared to traditional methods, this significantly improves measurement speed, making cloud condensation nucleus number concentration measurements more accurate and providing more reliable data support for atmospheric science research.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A CCN counter airflow control system with high-precision flow regulation function, characterized in that: This includes high-precision flow control valves, cloud condensation nucleus counters, optical particle counters, gas storage cylinders, and exhaust cylinders; An intake manifold, a metering valve, a filter, and a humidifier are sequentially installed between the high-precision flow regulating valve and the cloud condensation nucleus counter. A flow stabilizing device, a control device, a flow sensor, and a temperature and pressure compensation module are sequentially installed between the intake manifold and the cloud condensation nucleus counter. The intake manifold is connected to the gas storage cylinder and the exhaust cylinder via a pipeline, and electromagnetic pumps are installed between the gas storage cylinder and the exhaust cylinder and the cloud condensation nucleus counter and the optical particle counter.

2. The CCN counter airflow control system with high-precision flow regulation function according to claim 1, characterized in that: The high-precision flow regulating valve is installed on the air inlet pipe of the cloud condensation nucleus counter and precisely regulates the flow rate by electric or pneumatic means.

3. The CCN counter airflow control system with high-precision flow regulation function according to claim 2, characterized in that: The flow stabilizing device includes a pressure stabilizing tank and a flow damper to ensure the stability and uniformity of the airflow. The control device is microprocessor controlled and automatically adjusts the opening of the flow regulating valve according to preset parameters.

4. The CCN counter airflow control system with high-precision flow regulation function according to claim 3, characterized in that: A condensate drain valve is installed on one side of the optical particle counter. An electromagnetic pump and a filter dryer are sequentially installed on one side of the condensate drain valve. One side of the filter dryer is connected to the optical particle counter.

5. A CCN counter airflow control system with high-precision flow regulation function according to claim 4, characterized in that: The flow sensor is used to monitor the flow rate in real time and provide feedback signals to the control device. The temperature and pressure compensation module is electrically connected to the control device and is used to compensate for changes in ambient temperature and pressure.

6. A CCN counter airflow control system with high-precision flow regulation function according to claim 5, characterized in that: A cooler, a proportional valve, and an air pump are sequentially installed on the side of the optical particle counter away from the cloud condensation nucleus counter, and an electromagnetic pump is installed between the cooler and the exhaust bottle.

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