Aerosol generator

Abstract

The utility model discloses an aerosol generator. Solution forming aerosol is contained in a container; the output ends of the plurality of first gas pipelines enter the container and extend into the solution; the gas inlet pipe is connected with the input ends of the first gas pipelines and is used for conveying compressed gas to the specified first gas pipelines; the output end of the multi-way valve is connected with a plurality of first gas pipelines, the input end of the multi-way valve is connected with the gas inlet pipe, the gas inlet pipe is connected with the specified first gas pipeline in a gating manner, the nozzle is arranged at the output end of the first gas pipeline, and compressed gas input into the first gas pipeline from the gas inlet pipe passes through and then enables a solution in the container to form aerosol; the air outlet pipe is arranged on the upper portion of the container, aerosol formed by the nozzle is output to the outside of the container, in the working process, when the same particle generator is used, previous calibration particles are deposited in a pipeline to affect other subsequent pipelines, and the phenomenon that calibration results are inaccurate in the subsequent calibration process is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of particle counting, in particular to an aerosol generator. Background Art

[0002] A particle counter is a special instrument for testing the particle size and distribution of air dust particles. It has evolved from a microscope and has gone through a process such as microscope, sedimentation tube, sedimentation instrument, centrifugal sedimentation instrument, particle counter, laser air particle counter, condensation nucleus particle counter, multi-channel multi-function particle counter, etc. It is widely used in authoritative institutions such as provincial and municipal drug testing institutes, blood centers, epidemic prevention stations, disease control centers, quality supervision institutes, electronics industry, pharmaceutical workshops, semiconductors, optical or precision machining, plastics, spray painting, hospitals, environmental protection, testing institutes and other production enterprises and scientific research departments.

[0003] A particle counter is an instrument that uses the principle of light scattering to count dust particles. Particle counters typically require calibration to verify their accuracy for standard particle sizes. Calibration involves inputting calibration particles of known sizes into the particle counter. The actual and theoretical count results are used to determine the accuracy of the particle counter. Calibration particles are often artificial particles of varying sizes.

[0004] Artificial particles of different particle size standards are generally obtained through an aerosol generator. The aerosol generator uses compressed air to pass through a nozzle to form aerosol particles from a solution containing particles. However, a particle counter usually has counting channels for multiple particle size standards, such as 2, 4, 6, 8, etc., and at least two particle size standard counting channels are often calibrated.

[0005] Therefore, multiple artificial particles with standard particle sizes are required. When the same particle generator is used, the deposition of the previously calibrated particles in the pipeline will cause inaccurate calibration results during subsequent calibrations. Using multiple particle generators will seriously increase costs. Utility Model Content

[0006] The utility model aims to provide an aerosol generator, improve the accuracy of calibration results of calibration particles during subsequent calibration, and reduce the use cost of the particle generator.

[0007] In order to solve the above technical problems, the present invention provides an aerosol generator, comprising:

[0008] a container for holding the aerosol-forming solution;

[0009] a plurality of first gas pipelines, the output ends of which enter the container and extend into the solution;

[0010] an air inlet pipe connected to the input ends of the plurality of first gas pipelines and configured to deliver compressed gas to designated first gas pipelines;

[0011] a multi-way valve, the output end of which is connected to the plurality of first gas pipelines, the input end of which is connected to the air inlet pipe, and used for strobing and connecting the air inlet pipe to a designated first gas pipeline;

[0012] a nozzle, disposed at an output end of the first gas pipeline, for converting the compressed gas input from the air inlet pipe into an aerosol after passing through the solution in the container;

[0013] An air outlet pipe is provided at the upper portion of the container and is used for outputting the aerosol formed by the nozzle to the outside of the container.

[0014] Among them, it also includes a second gas pipeline with an input end connected to the multi-way valve and an output end connected to the outlet pipe, which is used to purify the aerosol particles deposited on the outlet pipe after the compressed gas input through the inlet pipe reaches the outlet pipe after passing through the second gas pipeline after the multi-way valve selects and connects the second gas pipeline to the inlet pipe.

[0015] It also includes a valve arranged between the second gas pipeline and the outlet pipe, which is used to close during the aerosol generation process to block the connection between the second gas pipeline and the outlet pipe, and to open the connection between the second gas pipeline and the outlet pipe during the purification of aerosol particles deposited in the outlet pipe.

[0016] Wherein, a porous filter is also included, which is arranged between the first gas pipeline and the gas outlet pipe, or at the inlet of the gas outlet pipe, and is used to filter aerosol particles larger than a predetermined size.

[0017] The container includes a cover and a bottle body, and the cover and the bottle body are threadedly connected for placing solution into the bottle body and cleaning the bottle body. The first gas pipeline, the second gas pipeline, and the gas outlet pipe are all connected to the cover.

[0018] In which, when the porous filter is arranged between the upper part of the first gas pipeline and the lower part of the outlet pipe, the cover part includes an upper cover and a lower cover that are threadedly connected, and the porous filter is clamped between the upper cover and the lower cover. The upper cover is provided with a clamping block for fixing the porous filter in an annular shape to the lower cover.

[0019] Among them, it also includes a sealing position set on the cover part, which is used to hang and hide the first gas pipeline corresponding to the nozzle in a non-working state.

[0020] The first gas pipeline includes a connector passing through the container and sealed with the container, and a hose connected to the multi-way valve and the nozzle at both ends of the connector respectively.

[0021] Wherein, the nozzle is a Laskin nozzle.

[0022] The aerosol generator provided by the embodiment of the utility model has the following advantages compared with the prior art:

[0023] The aerosol generator provided by the embodiment of the present invention generates an aerosol of a target particle size by using multiple first gas pipelines. During operation, when the same particle generator is used, the previous calibration particles deposited in the pipeline affect the subsequent other pipelines, thereby avoiding inaccurate calibration results during subsequent calibration. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 A schematic structural diagram of an embodiment of an aerosol generator provided by an embodiment of the present utility model;

[0026] Figure 2 A schematic structural diagram of another embodiment of the aerosol generator provided in an embodiment of the present utility model.

[0027] Among them, there are container-1, air inlet pipe-2, multi-way valve-3, first gas pipeline-4, nozzle-5, air outlet pipe-6, second gas pipeline-7, valve-8, cover-11, bottle body-12, porous filter-9, upper cover-111, lower cover-112, and block-113. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] Please refer to Figure 1-Figure 2 , Figure 1A schematic structural diagram of an embodiment of an aerosol generator provided by an embodiment of the present utility model; Figure 2 A schematic structural diagram of another embodiment of the aerosol generator provided in an embodiment of the present utility model.

[0030] In a specific embodiment, the aerosol generator comprises:

[0031] Container 1, for containing a solution to form an aerosol;

[0032] a plurality of first gas pipelines 4, the output ends of which enter the container 1 and extend into the solution;

[0033] an air inlet pipe 2 connected to the input ends of the plurality of first gas pipelines 4 and configured to deliver compressed gas to designated first gas pipelines 4;

[0034] a multi-way valve 3, whose output end is connected to a plurality of the first gas pipelines 4 and whose input end is connected to the air inlet pipe 2, for strobing and connecting the air inlet pipe 2 with a designated first gas pipeline 4;

[0035] The nozzle 5 is provided at the output end of the first gas pipeline 4 and is used to convert the compressed gas input from the air inlet pipe 2 into the first gas pipeline 4 to form an aerosol after the solution in the container 1 passes through the nozzle;

[0036] An air outlet pipe 6 is provided at the upper portion of the container 1 and is used to output the aerosol formed by the nozzle 5 to the outside of the container 1 .

[0037] The aerosol generator is used to generate aerosols of target particle size. For example, when the aerosol particles it generates are used to calibrate a particle counter, microparticles of the corresponding particle size used to generate aerosol particles of the target particle size can be dissolved in a solution, and compressed air is used to excite the solution containing the microparticles through a nozzle to form aerosol particles of the target particle size. During operation, when the same aerosol generator is used, such as using the same first gas pipeline, the aerosol particles of the target particle size formed previously are used as calibration particles and are deposited on the outlet pipe, nozzle, etc., which affect the subsequent generation of aerosol particles of other target particle sizes. Therefore, the present application uses multiple first gas pipelines 4, and one first gas pipeline 4 is used to produce an aerosol corresponding to the target particle size to avoid inaccurate calibration results during subsequent calibration.

[0038] In the present application, multiple first gas pipelines 4 are set up, and the input ends of each first gas pipeline 4 are respectively connected to the output ends of the multi-way valve. After using one first gas pipeline 4 to generate an aerosol corresponding to the target particle size, the first gas pipelines 4 will not affect each other, thereby reducing the impact of pipeline deposited particles and improving subsequent calibration efficiency.

[0039] It is understandable that the aerosol generator also includes a device for producing compressed gas, such as an air compressor, for providing compressed air to the air inlet pipe, and may also include pressure detection, pressure regulation devices, etc. With reference to the prior art, no specific limitation is made here.

[0040] The present application does not limit the number of the first gas pipelines 4 and the connection method with the air inlet pipe 2 .

[0041] It can be one-to-one, that is, one air inlet pipe 2 corresponds to one first gas pipeline 4. In use, only the required pipeline needs to be used. Since it is a one-to-one correspondence, only the corresponding recent pipeline needs to be selected. However, in actual use, there are too many external pipeline entrances, which is inconvenient to manage.

[0042] Therefore, a one-to-many approach is generally adopted. For example, if the number of the first gas pipelines 4 is 3 to 5, multiple first gas pipelines 4 are connected to the air inlet pipe 2 through a multi-way valve 3. After the multi-way valve 3 selects the air inlet pipe 2 and the designated first gas pipeline 4, the compressed gas is input into the corresponding first gas pipeline 4 to form an aerosol. By connecting the air inlet pipe 2 and the first gas pipeline 4 through the multi-way valve 3, the first gas pipelines 4 can be numbered and other operations can be performed. In actual use, the corresponding first gas pipeline 4 can be selected through the multi-way valve 3, which is simple to operate. In the selection process of the multi-way valve 3, manual selection or automatic selection can be adopted. This application does not limit its structure and control method.

[0043] Since some previously generated aerosol particles are inevitably deposited on the air outlet pipe 6 in actual use, a new air outlet pipe 6 can be used by disassembling and replacing it, but the cost of use is high and frequent replacement operations are required, which is cumbersome.

[0044] In order to solve this technical problem, in one embodiment, the aerosol generator also includes a second gas pipeline 7 whose input end is connected to the multi-way valve 3 and whose output end is connected to the outlet pipe 6, which is used to purify the aerosol particles deposited on the outlet pipe 6 after the compressed gas input through the inlet pipe 2 reaches the outlet pipe 6 after passing through the second gas pipeline 7 after the multi-way valve 3 selects and connects the second gas pipeline 7 to the inlet pipe 6.

[0045] By connecting the second gas pipeline 7 between the multi-way valve 3 and the outlet pipe 6, before it is necessary to replace the first gas pipeline 4 to produce aerosol particles of other target particle sizes, the inlet pipe selects the second gas pipeline 7 through the multi-way valve to connect to the outlet pipe 6, and the compressed air input through the inlet pipe 2 is used to purify the aerosol particles deposited on the outlet pipe 6. The entire process only requires selecting the second gas pipeline 7 to input compressed air after the instruction is issued, which is simple to operate and has high processing efficiency.

[0046] In order to prevent aerosol particles generated during the formation of aerosol particles from entering the second gas pipeline 7 and contaminating it, in one embodiment, the aerosol generator further includes a valve 8 arranged between the second gas pipeline 7 and the outlet pipe 6, which is used to close during the aerosol generation process to block the connection between the second gas pipeline 7 and the outlet pipe 6, and to open the connection between the second gas pipeline 7 and the outlet pipe during the purification of aerosol particles deposited in the outlet pipe 6.

[0047] By setting a valve 8 between the second gas pipeline 7 and the outlet pipe 6, it will be opened only during the purification process, and will be closed during the aerosol generation process to prevent the second air inlet pipe 2 from being contaminated by aerosol, thereby improving the reliability of use, and at the same time preventing aerosol particles from entering therein, thereby improving the ability to output aerosol to the outside.

[0048] The present application does not limit the type and control method of the valve 8 , and it can be, for example, a check valve, a ball valve, etc.

[0049] In order to improve the accuracy of aerosol particle size by ensuring that the diameter of aerosol particles is within a certain range after generation, in one embodiment, the aerosol generator further includes a porous filter 9, which is arranged between the first gas pipe 4 and the outlet pipe 2, or at the inlet of the outlet pipe 6, for filtering aerosol particles larger than a predetermined size.

[0050] By providing the porous filter 9 to filter aerosol particles larger than a predetermined size, the accuracy of the size of the output aerosol particles is ensured, thereby improving the quality of the aerosol generated by the device.

[0051] This application does not limit the structure and installation method of the porous filter.

[0052] The structure of the container 1 is not limited in this application. In order to facilitate the installation of components, in one embodiment, the container 1 includes a cover 11 and a bottle body 12. The cover 11 and the bottle body 12 are threadedly connected for placing solution into the bottle body 12 and cleaning the bottle body 12. The first gas pipeline 4, the second gas pipeline 7, and the air outlet pipe 6 are all connected to the cover 11. It can be understood that the first gas pipeline 4, the second gas pipeline 7, and the air outlet pipe 6 all pass through the container.

[0053] The present application includes but is not limited to the above-mentioned structures and connection methods. In addition to being threadedly connected, the cover 11 and the bottle body 12 can also adopt other connection structures such as snap-on connection, which is not limited in the present application.

[0054] The present application does not limit the position of the porous filter. In order to ensure the stability of its installation, in one embodiment, when the porous filter is arranged between the upper part of the first gas pipeline 4 and the lower part of the outlet pipe 6, the cover part 11 includes an upper cover 111 and a lower cover 112 that are threaded together, and the porous filter card 9 is fixed between the upper cover 111 and the lower cover 112. The upper cover is provided with a card block 113 for fixing the porous filter 9 in an annular manner on the lower cover 112.

[0055] By setting the cover as an upper cover 111 and a lower cover 112 connected by threads, the porous filter screen 9 is clamped between the two, and a clamping block 113 is set on the upper cover 111 to clamp the porous filter screen 9 in an annular manner, thereby improving installation efficiency and installation reliability.

[0056] This application does not limit the installation method of the porous filter 9 and the structure of the cover.

[0057] During use, there may be a situation where aerosol particles produced by a first gas pipeline enter or are deposited on other first gas pipelines and nozzles. In one embodiment, the aerosol generator also includes a sealing position arranged on the cover, which is used to hang and hide the nozzle corresponding to the first gas pipeline 4 in a non-working state.

[0058] The first gas pipeline 4 in a non-working state is hung on and hidden corresponding to the nozzle by sealing and locking, thereby improving the reliability of use.

[0059] The present application does not limit the structure and installation method of the sealing clamping position, for example, a box body with a door structure that can be clamped and hung on the cover.

[0060] The present application does not limit the structure of the first gas pipeline 4 and the structure of the nozzle 5. In one embodiment, the first gas pipeline 4 includes a connector that passes through the container 1 and is sealed to the container 1, and a hose that is respectively connected to the multi-way valve 3 and the nozzle 5 at both ends of the connector. The nozzle 5 is a Laskin nozzle.

[0061] The first gas pipeline 4 is provided by adopting a structure of connecting a connector to a hose, which has a simple structure and is convenient for connection.

[0062] The present application includes but is not limited to the use of hose connections, and does not limit the structure of the nozzle.

[0063] In one embodiment, the aerosol generator comprises

[0064] Container 1, used to hold the solution and provide space for forming aerosol;

[0065] a plurality of first gas pipelines 4, each of the first gas pipelines 4 penetrating the container and extending into the solution;

[0066] Inlet pipe 2, for delivering compressed gas;

[0067] a multi-way valve 3, connected to the air inlet ends of the plurality of first gas pipelines 4 and to the air outlet ends of the air inlet pipe 6, respectively, for inputting the compressed gas in the air inlet pipe 6 into the target first gas pipeline 4;

[0068] Multiple nozzles 5, each output end of the first gas pipeline 4 is connected to a nozzle, and the compressed gas forms an aerosol from the solution through the nozzle;

[0069] The air outlet pipe 6 is used to output aerosol.

[0070] When compressed gas is used to form an aerosol from the solution in the container through the nozzle, some particles will be sucked into the nozzle or even the pipe connected to the nozzle and deposited. When the nozzle is used to form aerosols of particles of other particle sizes, the aerosol formed by the deposited particles causes contamination of the calibration particles. Therefore, multiple independent first gas pipes 4 are used as gas supply pipes and nozzles to avoid contamination of the aerosol of target particles.

[0071] A second gas pipeline 7 is connected to the multi-way valve 3 and the gas outlet pipe 6 respectively; compressed gas is used to purify the aerosol particles deposited on the gas outlet pipe. The multi-way valve 3 opens the corresponding channel, and valve 8 also needs to be opened (the purpose of setting valve 8 is to prevent aerosol from contaminating the pipeline between the multi-way valve 3 and valve 8).

[0072] The container 1 includes a cover 11 and a bottle body 12. The cover and the bottle body are threadedly connected to facilitate cleaning and adding liquid. Usually, the first gas pipeline 4, the second gas pipeline 7, and the gas outlet pipe 6 are all connected to the cover.

[0073] The porous filter 9 is arranged between the upper part of the first gas pipeline 4 and the lower part of the gas outlet nozzle or connected to the gas outlet nozzle, and is detachable and used to filter aerosol particles with large particle size; when the porous filter 6 is arranged between the upper part of the first gas pipeline 4 and the lower part of the gas outlet nozzle, the cover includes a threaded upper cover 111 and a lower cover 112, and the porous filter 9 is fixed between the upper cover and the lower cover. The upper cover has a ring-shaped block 113 for pressing the porous filter. The cover can also be provided with a sealing position for hanging and hiding the corresponding nozzle of the first gas pipeline 4 in a non-working state, so as to further avoid the contamination of aerosols during operation.

[0074] The first gas pipeline 4 includes a connector that passes through the container 1 and is sealed with the container 1, and a hose that is respectively connected to a multi-way valve and a nozzle at both ends of the connector. The nozzle is a Laskin nozzle.

[0075] Each first gas pipeline 4 corresponds to producing an aerosol with a target particle size. During operation, the multi-way valve opens the valve of the corresponding first gas pipeline and keeps the other first gas pipelines 4 closed, so that the compressed gas is input into the corresponding first gas pipeline and generates an aerosol through the corresponding nozzle, and then the aerosol is output from the outlet pipe.

[0076] To sum up, the aerosol generator provided in the embodiment of the present invention generates an aerosol of a target particle size by using multiple first gas pipelines. During operation, when the same particle generator is used, the previous calibration particles deposited in the pipeline affect other subsequent pipelines, thereby avoiding inaccurate calibration results during subsequent calibration.

[0077] The above is a detailed introduction to the aerosol generator provided by the present invention. This article uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above examples is only intended to help understand the method and core concept of the present invention. It should be noted that for ordinary technicians in this technical field, various improvements and modifications can be made to the present invention without departing from the principles of the present invention, and such improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. An aerosol generator, characterized in that: include: a container for holding the aerosol-forming solution; a plurality of first gas pipelines, the output ends of which enter the container and extend into the solution; an air inlet pipe connected to the input ends of the plurality of first gas pipelines and configured to deliver compressed gas to designated first gas pipelines; a multi-way valve, the output end of which is connected to the plurality of first gas pipelines, the input end of which is connected to the air inlet pipe, and used for strobing and connecting the air inlet pipe to a designated first gas pipeline; a nozzle, disposed at an output end of the first gas pipeline, for converting the compressed gas input from the air inlet pipe into an aerosol after passing through the solution in the container; An air outlet pipe is provided at the upper portion of the container and is used for outputting the aerosol formed by the nozzle to the outside of the container.

2. The aerosol generator according to claim 1, characterized in that: It also includes a second gas pipeline with an input end connected to the multi-way valve and an output end connected to the outlet pipe, which is used to purify the aerosol particles deposited on the outlet pipe after the compressed gas input through the inlet pipe reaches the outlet pipe after passing through the second gas pipeline after the multi-way valve selects and connects the second gas pipeline to the inlet pipe.

3. The aerosol generator according to claim 2, characterized in that: It also includes a valve arranged between the second gas pipeline and the outlet pipe, which is used to close during the aerosol generation process to block the connection between the second gas pipeline and the outlet pipe, and to open the connection between the second gas pipeline and the outlet pipe during the purification of aerosol particles deposited in the outlet pipe.

4. The aerosol generator according to any one of claims 1 to 3, characterized in that: It also includes a porous filter, which is arranged between the first gas pipeline and the gas outlet pipe, or at the inlet of the gas outlet pipe, and is used to filter aerosol particles larger than a predetermined size.

5. The aerosol generator according to claim 4, characterized in that: The container includes a cover and a bottle body, wherein the cover and the bottle body are threadedly connected and are used for placing solution into the bottle body and cleaning the bottle body. The first gas pipeline, the second gas pipeline, and the gas outlet pipe are all connected to the cover.

6. The aerosol generator according to claim 5, characterized in that: When the porous filter is arranged between the upper part of the first gas pipeline and the lower part of the outlet pipe, the cover part includes an upper cover and a lower cover that are threadedly connected, and the porous filter is fixed between the upper cover and the lower cover. The upper cover is provided with a clamping block for fixing the porous filter in an annular shape on the lower cover.

7. The aerosol generator according to claim 6, characterized in that: It also includes a sealing position provided on the cover portion, which is used to hang and hide the first gas pipeline corresponding to the nozzle in a non-working state.

8. The aerosol generator according to claim 7, characterized in that: The first gas pipeline includes a connector that passes through the container and is sealed with the container, and a hose that is respectively connected to the multi-way valve and the nozzle at both ends of the connector.

9. The aerosol generator according to claim 1, wherein: The nozzle is a Laskin nozzle.

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