Multi-channel rapid switching standard particle generator

Abstract

This invention provides a multi-channel rapid switching standard particle generator, comprising: a misting module for generating standard particle aerosols in multiple independent channels; a high-pressure gas source module for generating compressed gas to be delivered to the multiple independent channels; a channel switching module for constraining the flow path of the compressed gas to facilitate switching between the multiple independent channels; a drying and dilution module for drying and diluting the standard particle aerosol generated by the misting module in any independent channel to form a standard particle aerosol suitable for the final output; and a control module for controlling at least one of the above modules. This effectively avoids cross-contamination of particles caused by traditional standard particle generators sharing the same generation channel, and improves the counting accuracy and effectiveness of the downstream detection instruments.

Description

Technical Field

[0001] This invention relates to the field of aerosol generation and detection, and more particularly to a multi-channel, rapidly switching standard particle generator. Background Technology

[0002] In industries such as cleanrooms, microbial testing, and pharmaceuticals, accurately and quickly verifying the accuracy of particle detection devices has always been a crucial quality control indicator. The standard particle aerosol used is the sole traceable reference material for calibrating these instruments, and the stability, efficiency, and accuracy of its generation device directly impact the calibration of the particle detection device. Relevant standards such as JJF1190-2008 "Calibration Specification for Online Dust Particle Counters" and GB / T 13554-2020 "High-Efficiency Air Filters" specify the required parameters for the standard aerosols used in calibration and testing.

[0003] However, traditional standard particle aerosol generators have some drawbacks, which directly affect the accuracy and stability of the generating device.

[0004] One of the main drawbacks is that traditional generators use external compressed air as the gas source, and different standard particle aerosols use the same solution bottle and gas delivery channel. This design inevitably leads to cross-contamination of aerosols during the generation process. Cross-contamination may cause interference and changes in the composition and concentration of standard particle aerosols, thereby affecting the accuracy and reliability of particle detection devices.

[0005] This cross-contamination issue is particularly important in the field of particle detection because standard particle aerosols are widely used to calibrate and verify the performance of particle detection devices. If cross-contamination occurs within the device itself, it will affect the counting accuracy and effectiveness of downstream detection instruments.

[0006] Therefore, in order to overcome the shortcomings of traditional standard particle aerosol generators, it is necessary to introduce improved technical means to avoid cross-contamination of aerosols and improve the accuracy and reliability of the generating device. Summary of the Invention

[0007] To avoid cross-contamination of particles caused by traditional standard particle generators sharing the same generation channel, and to improve the counting accuracy and effectiveness of downstream detection instruments, this invention provides a multi-channel rapid switching standard particle generator, comprising: a fogging module for generating standard particle aerosols in multiple independent channels; a high-pressure gas source module for generating compressed gas to be delivered to the multiple independent channels; a channel switching module for constraining the flow path of the compressed gas to facilitate switching delivery of the compressed gas between the multiple independent channels; a drying and dilution module for drying and diluting the standard particle aerosol generated by the fogging module in any independent channel to form a standard particle aerosol suitable for final output; and a control module for controlling at least one of the fogging module, high-pressure gas source module, channel switching module, and drying and dilution module.

[0008] In one exemplary embodiment, the atomizing module includes generators corresponding to the generation of standard particle aerosols in the plurality of independent channels; wherein, the generator includes: a standard particle sample solution bottle containing a standard particle solution; an atomizing nozzle immersed in the standard particle solution for atomizing the standard particle solution to form the standard particle aerosol; an air inlet pipe connected to the channel switching module for receiving compressed gas switched and delivered by the channel switching module; and an aerosol outlet pipe connected to the drying and dilution module for delivering the standard particle aerosol to the drying and dilution module for drying and dilution.

[0009] In one exemplary embodiment, the standard particle solutions contained in different standard particle sample solution bottles have different particle sizes.

[0010] In one exemplary embodiment, the channel switching module includes: a plurality of high-pressure gas outlets, each connected to an inlet pipe corresponding to a different generator, for delivering compressed gas; and a channel switching valve for switching the connection between the high-pressure gas source module and the plurality of high-pressure gas outlets.

[0011] In one exemplary embodiment, the channel switching module further includes a high-efficiency filter located on the path between the high-pressure gas source module and the plurality of generators for filtering compressed gas.

[0012] In one exemplary embodiment, the drying and dilution module includes: a drying chamber; a gas delivery device for generating and delivering drying and dilution gas into the drying chamber; multiple aerosol inlets connected to aerosol outlets corresponding to different generators for receiving standard particle aerosols output from the aerosol outlets; and an aerosol outlet; wherein the drying and dilution gas and the standard particle aerosols are simultaneously delivered into the drying chamber, the standard particle aerosols are dried and diluted in the drying chamber to form standard particle aerosols suitable for final output, and delivered through the aerosol outlet.

[0013] In one exemplary embodiment, the drying and dilution module further includes a heating device for heating the drying and dilution gas.

[0014] In one exemplary embodiment, the gas delivery device is a fan or an air pump.

[0015] In one exemplary embodiment, the control module is a whole machine electrical control and algorithm operation logic control unit.

[0016] In one exemplary embodiment, it further includes: a housing for accommodating one or more of the fogging module, high-pressure gas source module, channel switching module, drying and dilution module, and control module.

[0017] The aerosol generator provided by this invention, by setting up different particle size generation channels and a built-in high-pressure gas source generation module, avoids uncertainties in the aerosol generation process and effectively prevents cross-contamination of standard particle aerosols. Simultaneously, by using different particle size switching channels, the standard particle aerosol generation channels can be switched in real time, increasing the accuracy, timeliness, and convenience of the generator. Through drying and dilution treatment of the aerosol, the quality and stability of the final output standard particle aerosol are ensured. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the architecture of a generating apparatus shown according to one or more embodiments of the present invention;

[0020] Figure 2 This is a further schematic diagram of the architecture of the generating apparatus shown according to one or more embodiments of the present invention;

[0021] Figure 3This is a schematic diagram of the structure of a generating apparatus according to one or more embodiments of the present invention;

[0022] Figure 4 , 5 The present invention provides one or more embodiments illustrating the structure of the hidden housing in the generating device from different directional perspectives.

[0023] Figure 6 This is a schematic diagram of the internal structure of a standard particle sample solution bottle according to one or more embodiments of the present invention;

[0024] Figure 7 This is a schematic diagram of the structure of a device for generating a door in an open state, as shown in one or more embodiments of the present invention;

[0025] Figure 8-11 This is a schematic diagram of the internal gas path connection of the device corresponding to 0.3μm, 0.4μm, 0.5μm, and 0.6μm aerosols, respectively, according to one or more embodiments of the present invention;

[0026] Figure 12 This is a schematic diagram of the operation of a generating apparatus according to one or more embodiments of the present invention. Detailed Implementation

[0027] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0028] This invention provides a multi-channel rapid switching standard particle generator for generating standard particle aerosols.

[0029] Reference Figure 1 The diagram illustrates the architecture of the generating device 10. In some embodiments, the generating device 10 consists of a misting module 300, a high-pressure gas source module 200, a channel switching module 400, a drying and dilution module 500, and a control module 600.

[0030] The system includes a fogging module 300 that generates standard particle aerosols in multiple independent channels, a high-pressure gas source module 300 that generates compressed gas and delivers it to each independent channel, a channel switching module 400 located between the high-pressure gas source module 300 and the fogging module 300, connecting the gas source module 200 and the fogging module 300 respectively, and constraining the flow path of the compressed gas generated and delivered by the high-pressure gas source module 300. By changing its flow path, the compressed gas can be switched between multiple independent channels. Specifically, the channel switching module 400 can guide the compressed gas to different independent channels to achieve rapid switching between multiple channels. The drying and dilution module 500 can dry and dilute the standard particle aerosol generated by the fogging module 300 in any independent channel to form a standard particle aerosol suitable for the final output for use by downstream detection instruments.

[0031] In some embodiments, the control module 600 is connected to the misting module 300, the high-pressure gas source module 200, the channel switching module 400, and the drying and dilution module 500, respectively, and is used to control the above modules. For example, the control module may include one or more control units for setting and adjusting the parameters and operating modes of each module.

[0032] The generating device 10 provided in this embodiment of the invention, through the combination of a fogging module 300, a high-pressure gas source module 200, a channel switching module 400, a drying and dilution module 500, and a control module 600, achieves the technical effects of avoiding aerosol cross-contamination, rapid switching of multiple channels, and precise dilution, providing an effective solution for the accuracy and reliability of particle detection devices.

[0033] For example, the high-pressure gas source module 200 includes, but is not limited to, devices that can generate high-pressure gas, such as compressors, diaphragm pumps, or plunger pumps.

[0034] Reference Figure 2 The diagram illustrates a further architecture of the generating device 10. In some embodiments, the high-pressure gas source module 200 employs a diaphragm pump 201 as its core component. The diaphragm pump 201 is a device capable of generating compressed gas and delivering it to various independent channels. Its working principle is based on the reciprocating motion of the diaphragm. When the diaphragm moves upward, the compressed gas in the pump chamber is drawn into the air inlet chamber of the diaphragm pump 201. Subsequently, the diaphragm moves downward, and the compressed gas is discharged and delivered to various independent channels. In this way, the diaphragm pump 201 can stably generate the required compressed gas and deliver it to multiple independent channels of the misting module 300.

[0035] exist Figure 2In the example described, the fogging module 300 is configured as generators 300a, 300b, 300c, and 300d that generate standard particle aerosols in four independent channels, respectively. It should be noted that the number of independent channels can be set according to actual needs, that is, the corresponding number of generators can be set. For example, in other examples, the number of generators can be expanded to 10 to match the corresponding 10 independent channels.

[0036] The channel switching module 400 includes a channel switching valve 401, whose main function is to control the flow path of compressed gas and achieve switching between multiple independent channels. The channel switching valve 401 can have different settings, for example, in... Figure 2 In the described example, the channel switching module 400 is configured with four channel switching valves 401, each corresponding to generators 300a, 300b, 300c, and 300d respectively. This configuration allows for individual control of the gas flow in each channel, enabling rapid switching between independent channels. In other examples, the channel switching valves 401 can also be configured as a master valve that controls the gas flow in all independent channels. By controlling the opening and closing of the master valve, the delivery path of the compressed gas can be switched, guiding it to the desired independent channel. This configuration may be simpler and more integrated in some cases, but it may require a longer switching time.

[0037] The drying and dilution module 500 includes a gas delivery device 501 for generating drying and dilution gas and a drying chamber 508. The gas delivery device 501 delivers the generated drying and dilution gas into the drying chamber 508 to dry and dilute the standard particle aerosol that enters the drying chamber 508 at the same time as the drying and dilution gas, so as to form a standard particle aerosol suitable for the final output.

[0038] Specifically, the gas delivery device 501 is responsible for generating a drying and diluting gas and delivering it to the drying chamber 508. The drying and diluting gas can be a dehumidified gas or a gas provided from a drying gas source to ensure its relative humidity is low. The drying chamber 508 is a closed cavity used to contain the drying and diluting gas and the incoming standard particle aerosol. Inside the drying chamber 508, the drying and diluting gas comes into contact with the incoming standard particle aerosol. By controlling the conditions inside the drying chamber 508, such as temperature, humidity, and residence time, the drying chamber 508 can effectively dry and dilute the standard particle aerosol. The low humidity of the drying and diluting gas helps to eliminate moisture in the standard particle aerosol and achieve the required degree of dryness. At the same time, the dilution effect of the drying and diluting gas can be adjusted to adjust the concentration of the standard particle aerosol as needed.

[0039] For example, the gas delivery device 501 is a fan 501. The fan 501 generates airflow by rotating blades and pushes the dry dilution gas into the drying chamber 508.

[0040] For example, the gas delivery device 501 is an air pump. The air pump can generate an airflow by compressing air or other gas pressure and deliver the drying and diluting gas into the drying chamber 508.

[0041] In some embodiments, the drying and dilution module 500 further includes a heating device 502 for heating the drying and dilution gas to provide suitable temperature conditions to facilitate the drying process. Exemplarily, the heating device 502 is installed inside the drying and dilution module 500 or in the drying chamber 508. By providing the heating device 502, the drying and dilution module 500 can provide appropriate temperature conditions to facilitate the drying process. Appropriate heating helps improve the drying speed and efficiency to remove moisture from the standard particle aerosol. The temperature control function of the heating device 502 can be adjusted as needed to ensure that the temperature of the drying and dilution gas is within an appropriate range. Through the application of the heating device 502, the drying and dilution module 500 can provide suitable temperature and humidity conditions in the drying chamber 508 to achieve the drying and dilution of the standard particle aerosol. This heating function further improves the quality and stability of the standard particle aerosol and ensures that the final output sample meets the requirements for subsequent particle detection and analysis.

[0042] In some embodiments, the channel switching module 400 includes a high-efficiency filter 402 located in the path between the high-pressure gas source module 200 and the generators 300a, 300b, 300c, and 300d, for filtering the compressed gas. The main function of the high-efficiency filter 402 is to remove solid particles, droplets, and other impurities from the compressed gas. These impurities may be present in the compressed gas and could damage the components and channels inside the generators 300a, 300b, 300c, and 300d, while also affecting the quality of the standard particulate aerosol. By placing the high-efficiency filter 402 in the path of the compressed gas, the compressed gas must pass through the filter 402 before entering the generators 300a, 300b, 300c, and 300d. The high-efficiency filter 402 typically uses high-efficiency filter materials, for example, a HEPA (High-Efficiency Particulate Air) filter or an ULPA (Ultra-High-Efficiency Particulate Air) filter to ensure efficient filtration. The application of the high-efficiency filter 402 in the channel switching module 400 can improve the performance and stability of the generator, ensure the quality of the compressed gas, and thus provide high-quality samples for the final output standard particle aerosol.

[0043] Reference Figure 3The structure of the generating device 10 is shown. The generating device 10 forms the outer outline of the entire device through the housing 100, which is composed of a base 101, a front panel 102, a top cover 103, and a side panel 104.

[0044] For example, the misting module 300, the high-pressure gas source module 200, the channel switching module 400, the drying and dilution module 500, and the control module 600 are disposed inside the housing 100, thereby forming the generating device 10 together with the housing.

[0045] For example, a portion of the misting module 300, high-pressure gas source module 200, channel switching module 400, drying and dilution module 500, and control module 600 are disposed inside the housing 100. A portion is disposed outside the housing 100, thus together with the housing, constituting the generating device 10.

[0046] Reference Figure 4-6 , Figure 4 , 5 The structure of the hidden housing in the generating device 10 is shown from different directional perspectives. Figure 6 The internal structure of the standard particle sample solution bottle is shown.

[0047] In some embodiments, the misting module 300 is disposed within the housing 100 and fixed to the base 101. The misting module 300 comprises the following components: standard particle sample solution bottles 301a, 301b, 301c, and 301d; misting nozzles 302a, 302b, 302c, and 302d; air inlet pipes 303a, 303b, 303c, and 303d; and aerosol outlet pipes 304a, 304b, 304c, and 304d.

[0048] Standard particle sample solution bottles 301a, 301b, 301c, and 301d contain standard particle solutions. These solution bottles are used to store standard particle solutions and provide the particle samples required by the fogging module 300. Each standard particle sample solution bottle corresponds to an independent channel.

[0049] The atomizing nozzles 302a, 302b, 302c, and 302d are placed inside the standard particle sample solution bottles 301a, 301b, 301c, and 301d and immersed in the standard particle solution. Their function is to atomize the standard particle solution to form standard particle aerosols. Each atomizing nozzle corresponds to an independent channel to ensure that the aerosols in each channel are generated independently.

[0050] Inlet pipes 303a, 303b, 303c, and 303d are connected to channel switching module 400 via pipelines to receive compressed gas switched and delivered by channel switching module 400. Inlet pipes 303a, 303b, 303c, and 303d guide the compressed gas into the corresponding channels to drive the standard particle solution through atomizing nozzles 302a, 302b, 302c, and 302d for atomization.

[0051] Aerosol outlet pipes 304a, 304b, 304c, and 304d are connected to the drying and dilution module 500 via pipelines to deliver standard particle aerosols to the drying and dilution module 500 for drying and dilution. Aerosol outlet pipes 304a, 304b, 304c, and 304d guide the generated standard particle aerosols from the fogging module 300 to the drying and dilution module 500, ensuring that the standard particle aerosols are dried and diluted in the drying and dilution module 500.

[0052] With the above component configuration, the fogging module 300 can realize the generation of standard particle aerosols in multiple channels. Each channel consists of a corresponding standard particle sample solution bottle, fogging nozzle, air inlet pipe and aerosol outlet pipe. This configuration can ensure the independence between different channels and enable each channel to generate standard particle aerosols with appropriate concentrations for subsequent drying and dilution.

[0053] In some embodiments, the channel switching module 400 includes high-pressure gas outlets 403a, 403b, 403c, 403d and a channel switching valve 401.

[0054] High-pressure gas outlets 403a, 403b, 403c, and 403d are connected to the corresponding air inlet pipes 303a, 303b, 303c, and 303d of generators 300a, 300b, 300c, and 300d via pipelines to deliver compressed gas. Each high-pressure gas outlet corresponds to one channel, ensuring the independence of each channel.

[0055] The channel switching valve 401 is located between the high-pressure gas source module 200 and the high-pressure gas outlets 403a, 403b, 403c, and 403d. It is used to switch the connection between the high-pressure gas source module 200 and each of the high-pressure gas outlets 403a, 403b, 403c, and 403d to control the flow path of the compressed gas. By changing the state of the channel switching valve 401, the compressed gas can be guided to the desired channel, realizing the switching and delivery of compressed gas between channels. For example, the high-pressure gas source module 200 is fixed to the base 101.

[0056] During channel switching, each channel maintains its independence and specialization to avoid process interference and contamination. The operation of the channel switching valve 401 allows compressed gas to be delivered to a specific channel as needed, ensuring that each channel operates independently without interference from other channels. The channel switching module 400, equipped with high-pressure gas outlets 403a, 403b, 403c, and 403d and the channel switching valve 401, enables rapid switching between multiple channels. Each channel has a dedicated high-pressure gas outlet 403a, 403b, 403c, and 403d to maintain channel independence. Simultaneously, the presence of the channel switching valve 401 makes the switching process more flexible and controllable, ensuring the stability and accuracy of the generating device 10 during multi-channel operation and avoiding interference and contamination between channels.

[0057] In some embodiments, a high-efficiency filter 402 is positioned in the path between the high-pressure gas source module 200 and the high-pressure gas outlets 403a, 403b, 403c, and 403d for filtering compressed gas. By positioning the high-efficiency filter 402 in the path between the high-pressure gas source module 200 and the high-pressure gas outlets 403a, 403b, 403c, and 403d, the compressed gas is filtered by the filter 402 before being delivered to the respective channels through the high-pressure gas outlets 403a, 403b, 403c, and 403d.

[0058] In some embodiments, the drying and dilution module 500 comprises the following components: a drying chamber 505, a fan 501, aerosol inlets 503a, 503b, 503c, 503d, and an aerosol outlet 504.

[0059] Aerosol inlets 503a, 503b, 503c, and 503d are connected to the corresponding aerosol outlet pipes 304a, 304b, 304c, and 304d of generators 300a, 300b, 300c, and 300d, respectively. These inlets receive the standard particle aerosols output from the outlet pipes 304a, 304b, 304c, and 304d. The aerosol inlets 503a, 503b, 503c, and 503d guide the standard particle aerosols into the drying chamber 505 for subsequent drying and dilution. The final output of the drying and dilution module 500 is a suitable standard particle aerosol. After undergoing the drying and dilution process within the drying chamber 505, these aerosols achieve a suitable degree of dryness and concentration and can be delivered through the aerosol outlet 504. Through the operation of the drying and dilution module 500, the standard particle aerosol is properly dried and diluted to meet the requirements of the final output. This process ensures the quality and accuracy of the standard particle aerosol, making it suitable for subsequent detection and analysis needs.

[0060] Reference Figure 1-3In some embodiments, the control module 600 is the electrical control and algorithm operation logic control unit for the entire generating device. The control module 600 includes the following components: MCU 601 (microcontroller unit), diaphragm pump controller 602, fan controller 603, channel controller 604, power supply 605, display screen 606, status indicator light 607, and switch 608.

[0061] The MCU (Microcontroller Unit) 601 is the core control unit of the entire device, responsible for handling communication and data interaction between various modules, as well as the operating logic and algorithms of the control device. It can precisely control and coordinate various modules such as the misting module 300, high-pressure gas source module 200, channel switching module 400, and drying / dilution module 500 according to preset parameters and algorithm rules. The diaphragm pump controller 602 controls the operation of the diaphragm pump 201, including controlling the supply and regulation of compressed gas to ensure stable pressure output. The fan controller 603 controls the operation of the fan 501, including controlling the start / stop of the fan and regulating the airflow to ensure proper delivery of drying / dilution gas. The channel controller 604 controls the on / off state of the channel switching valve 401 in the channel switching module 400, enabling rapid switching between channels. The power supply 605 provides power to the entire device, ensuring the normal operation of each module. The display screen 606 displays key parameter information such as the high-pressure gas pressure of the diaphragm pump 201 and the dryer flow rate of the fan 501, facilitating monitoring and adjustment by operators. The status indicator light 607 is used to display the current operating status of the generator, including three states: running, alarm, and fault. By observing the status indicator light, operators can quickly understand the working status of the device and perform timely handling and maintenance.

[0062] The control module 600 enables centralized control and management of all modules of the generating device, ensuring stable operation and reliability. Operators can monitor the status of the device through the display screen 606 and status indicator lights 607, and adjust and maintain it to meet experimental or testing needs.

[0063] Reference Figure 3 , 7 , Figure 7 The structure of the generating device with the door open is shown. In some embodiments, the housing 100 is also equipped with a door 105 corresponding to the standard particle sample solution bottle. The door 105 allows the user to easily inspect or replace the standard particle sample solution bottle. Through the door 105, the user can easily open and enter the housing 100 to directly access the standard particle sample solution bottle covered by the door 105.

[0064] For example, the standard particle solutions contained in the different standard particle sample solution bottles have different particle sizes. In this embodiment, the quasi-particle sample solution bottles 301a, 301b, 301c, and 301d contain standard particle solutions of different particle sizes.

[0065] For example, this embodiment uses the online dust particle counter calibration process as an example. The generating device is used to generate standard particle aerosols. This process requires the use of standard particle aerosols with particle sizes of 0.3μm, 0.4μm, 0.5μm, and 0.6μm for verification and testing.

[0066] The following section uses the online dust particle counter calibration process as an example to briefly describe the specific functions of this device.

[0067] Solution bottles 301, 302, 303, and 304 contain standard particle solutions of 0.3, 0.4, 0.5, and 0.6 μm, respectively. Diaphragm pump 201 operates and generates high-pressure gas, while fan 501 and heating device 502 operate to generate drying and dilution gas.

[0068] Reference Figure 8 The diagram illustrates the internal gas path connections for a 0.3 μm aerosol. When a 0.3 μm standard particle aerosol occurs, the channel controller 604 is set to the 0.3 μm channel. The internal gas path connections are as follows:

[0069] One-way connection: Diaphragm pump 201 → High efficiency filter 402 → Channel switching valve 401 → High pressure gas outlet 403a → Sample solution bottle 301a → Inlet pipe 303a → Fogging nozzle 302a → Aerosol outlet pipe 304a → Aerosol inlet 503a → Drying chamber 505.

[0070] Two-way connection: Fan 501 → Heating device 502 → Drying chamber 505.

[0071] In the above two connections, the drying chamber 505 leads to the aerosol outlet 504.

[0072] Reference Figure 9 The diagram illustrates the internal gas path connections for a 0.4 μm aerosol. When a 0.4 μm standard particle aerosol occurs, the channel controller 604 is set to the 0.4 μm channel. The internal gas path connections are as follows:

[0073] One-way connection: Diaphragm pump 201 → High-efficiency filter 402 → Channel switching valve 401 → High-pressure gas outlet 403b → Sample solution bottle 301b → Inlet pipe 303b → Fogging nozzle 302b → Aerosol outlet pipe 304b → Aerosol inlet 503b → Drying chamber 505.

[0074] Two-way connection: Fan 501 → Heating device 502 → Drying chamber 505.

[0075] In the above two connections, the drying chamber 505 leads to the aerosol outlet 504.

[0076] Reference Figure 10 The diagram illustrates the internal gas path connections for a 0.5 μm aerosol. When a 0.5 μm standard particle aerosol occurs, the channel controller 604 is set to the 0.5 μm channel. The internal gas path connections are as follows:

[0077] One-way connection: Diaphragm pump 201 → High efficiency filter 402 → Channel switching valve 401 → High pressure gas outlet 403c → Sample solution bottle 301c → Inlet pipe 303c → Fogging nozzle 302c → Aerosol outlet pipe 304c → Aerosol inlet 503c → Drying chamber 505.

[0078] Two-way connection: Fan 501 → Heating device 502 → Drying chamber 505.

[0079] In the above two connections, the drying chamber 505 leads to the aerosol outlet 504.

[0080] Reference Figure 11 The diagram illustrates the internal gas path connections for a 0.6 μm aerosol. When a 0.6 μm standard particle aerosol occurs, the channel controller 604 is set to the 0.6 μm channel. The internal gas path connections are as follows:

[0081] One-way connection: Diaphragm pump 201 → High efficiency filter 402 → Channel switching valve 401 → High pressure gas outlet 403d → Sample solution bottle 301d → Inlet pipe 303d → Fogging nozzle 302d → Aerosol outlet pipe 304d → Aerosol inlet 503d → Drying chamber 505.

[0082] Two-way connection: Fan 501 → Heating device 502 → Drying chamber 505.

[0083] In the above two connections, the drying chamber 505 leads to the aerosol outlet 504.

[0084] By adjusting the channel controller 604, different aerosol generation channels can be switched in real time. At the same time, dedicated channels and solution bottles are used for various particle sizes to avoid cross-contamination during the generation process.

[0085] Reference Figure 12 The working process of the generating device is shown below:

[0086] a. Prepare the standard particle solution and place it in a dedicated solution bottle;

[0087] b. Set relevant parameter information for pumps, fans, and generation channels;

[0088] c. Observe the parameter information through the display screen;

[0089] d. Adjust the generation parameters using the parameter information displayed on the screen;

[0090] e. Complete the parameter settings and start generating standard particle aerosols.

[0091] In step a, a standard particle solution is prepared and placed in a special solution bottle. The standard particle solution is the raw material used to generate standard particle aerosols, and its concentration and composition need to be adjusted and prepared according to actual needs.

[0092] In step b, relevant parameter information such as pump, fan, and generation channel is set. Through the control module 600, parameters such as pressure, flow rate, and channel switching module 400 can be set for the diaphragm pump 201, fan, and channel switching module 400.

[0093] In step c, the parameter information is observed through the display screen 606. The display screen will show the high pressure of the diaphragm pump, the dryer flow rate of the blower and other key parameters in real time, providing the operator with information for monitoring and adjustment.

[0094] In step d, the generating parameters are adjusted according to the parameter information displayed on the screen. That is, according to actual needs, the operator can adjust the pump, fan, etc. according to the information displayed on the screen to ensure that the set parameters meet the requirements.

[0095] In step e, after the parameter settings are completed, the generation of standard particle aerosol begins. The generator is activated, and the diaphragm pump 201 delivers compressed gas to each independent channel, atomizing the standard particle solution into standard particle aerosol through atomizing nozzles 302a, 302b, 302c, and 302d. Simultaneously, the drying and dilution module 500 dries and dilutes the aerosol to form a standard particle aerosol suitable for the final output.

[0096] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0097] In this invention, unless otherwise explicitly specified and limited, the following refers to the following: "above" or "below" the second feature can mean that the first and second features are in direct contact, or that they are in indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0098] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

[0099] Explanation of reference numerals in the attached figures

[0100] 100-Shell

[0101] 101-Base

[0102] 102-Front Panel

[0103] 103-Top Cover

[0104] 104 side panels

[0105] 105 gates.

[0106] 200-High Pressure Air Source Module

[0107] 201-Diaphragm Pump

[0108] 300-Fogging Module

[0109] 300a, 300b, 300c, 300d - Generator

[0110] 301a, 301b, 301c, 301d - Quasi-particle sample solution vials

[0111] 302a, 302b, 302c, 302d - Mist Nozzles

[0112] 303a, 303b, 303c, 303d - Intake pipe

[0113] 304a, 304b, 304c, 304d - Aerosol Outlet Pipes

[0114] 400-Channel Switching Module

[0115] 401-Channel Switching Valve

[0116] 402-High-efficiency filter

[0117] 403a, 403b, 403c, 403d - High-pressure air outlet nozzle

[0118] 500-Drying and Dilution Module

[0119] 501 - Gas Conveying Device (Fan)

[0120] 502 - Heating Device

[0121] 503a, 503b, 503c, 503d - Aerosol Inlet

[0122] 504 - Aerosol Outlet

[0123] 505-Drying Chamber

[0124] 600-Control Module

[0125] 601-MCU

[0126] 602-Diaphragm Pump Controller

[0127] 603-Fan Controller

[0128] 604-Channel Controller

[0129] 605-Power Supply

[0130] 606-Display Screen

[0131] 607 - Status Indicator

[0132] 608 - Switch.

Claims

1. A multi-channel, rapidly switching standard particle generator, characterized in that, include: A fogging module is used to generate standard particulate aerosols in multiple independent channels; A high-pressure gas source module is used to generate compressed gas for delivery into the multiple independent channels; The channel switching module is used to constrain the flow path of the compressed gas so as to facilitate the switching and delivery of the compressed gas between the multiple independent channels; A drying and dilution module is used to dry and dilute the standard particle aerosol generated by the fogging module in any independent channel to form a standard particle aerosol suitable for the final output. as well as The control module is used to control at least one of the misting module, high-pressure gas source module, channel switching module and drying and dilution module; The fogging module includes generators corresponding to the generation of standard particle aerosols in the plurality of independent channels, and the generators include: A standard particle sample solution bottle containing a standard particle solution; A misting nozzle is immersed in a standard particle solution and is used to atomize the standard particle solution to form the standard particle aerosol. An air inlet pipe is connected to the channel switching module and is used to receive compressed gas switched and delivered by the channel switching module. An aerosol outlet pipe is connected to the drying and dilution module and is used to transport the standard particle aerosol to the drying and dilution module for drying and dilution. The channel switching module includes: Multiple high-pressure gas outlets are connected to the air inlet pipes corresponding to different generators for delivering compressed gas; A channel switching valve is used to switch the connection between the high-pressure gas source module and multiple high-pressure gas outlets; A high-efficiency filter, located in the path between the high-pressure gas source module and the multiple generators, is used for filtering compressed gas; The drying and dilution module includes: Drying chamber; A gas delivery device is used to generate drying and diluting gas and deliver it into the drying chamber; Multiple aerosol inlets are connected to aerosol outlets corresponding to different generators to receive standard particle aerosols output from the aerosol outlets. Aerosol outlet; The drying and diluting gas and the standard particle aerosol are simultaneously introduced into the drying chamber. The standard particle aerosol is dried and diluted in the drying chamber to a standard particle aerosol suitable for the final output, and then conveyed through the aerosol outlet.

2. The generating apparatus according to claim 1, characterized in that, The standard particle solutions contained in the different standard particle sample solution bottles have different particle sizes.

3. The generating apparatus according to claim 1, characterized in that, The drying and dilution module also includes: A heating device for heating the dried dilution gas.

4. The generating apparatus according to claim 1, characterized in that, The gas delivery device is a fan or an air pump.

5. The generating apparatus according to claim 1, characterized in that, The control module is a logic control unit for the electrical control and algorithm operation of the whole machine.

6. The generating apparatus according to claim 1, characterized in that, Also includes: The housing is used to accommodate one or more of the misting module, high-pressure gas source module, channel switching module, drying and dilution module, and control module.

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