Large-particle-size aerosol atomizer

Abstract

The invention provides a large-particle-size aerosol atomizer which comprises a solution bottle, an aerosol generating chamber is installed on the solution bottle, an aerosol nozzle and an impact ball located in front of the aerosol nozzle are installed in the aerosol generating chamber, a gas inlet nozzle is arranged at one end of the aerosol generating chamber, and an annular gas generating device is arranged at the other end of the aerosol generating chamber. The annular gas generating device comprises a gas inlet end, a contraction cavity and a gas outlet nozzle. The gas inlet end is provided with an annular groove and an annular gas inlet communicated with the annular groove. The aerosol atomizer is small in size, convenient to carry and install, stable in mist spraying, fine and uniform in mist drop and high in atomization efficiency. The aerosol atomizer can be used for generating various aerosols including microorganisms and standard particles with different particle sizes, and standard particle aerosols with the maximum size of 10 microns can be generated.

Description

Technical Field

[0001] The invention belongs to the field of gas detection equipment, and in particular relates to a large-particle aerosol atomizer. Background Art

[0002] Aerosol generators are instruments that physically convert solid or liquid substances into suspended particles. They are widely used in filter efficiency testing, measurement equipment calibration, toxicology research, and other fields. Existing portable aerosol generators often use aerosol nozzles to mix gas and liquid to produce aerosols, which can meet the requirements of small-particle aerosol production. However, when using these generators to produce large-size standard particles (around 10 μm), technical challenges such as particle sedimentation or clustering, unstable concentration, and poor monodispersity arise. The resulting aerosol particle size and concentration are difficult to meet the requirements of laboratory instrument use and calibration. Summary of the Invention

[0003] The present invention addresses the technical problems of particle sedimentation or clustering and unstable concentration when existing portable aerosol generators produce large-size standard particles. An aerosol atomizer is proposed that can generate stable, high-concentration aerosols and can also generate large-size standard particles according to actual needs.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is:

[0005] A large-particle aerosol atomizer comprises a solution bottle, an aerosol generating chamber is installed on the solution bottle, an aerosol nozzle and an impact ball located in front of the aerosol nozzle are installed in the aerosol generating chamber, the aerosol nozzle is connected to a liquid inlet pipe extending into the solution bottle; an air inlet nozzle is provided at one end of the aerosol generating chamber, and an annular gas generating device is provided at the other end, the annular gas generating device comprises an air inlet end, a contraction cavity and an air outlet nozzle, and the air inlet end is provided with an annular groove and an annular gas inlet connected to the annular groove.

[0006] Preferably, the contraction cavity includes a cylindrical portion and a contraction portion.

[0007] Preferably, the aerosol nozzle is installed at the outlet end of the air inlet nozzle.

[0008] Preferably, the impact ball is connected to the aerosol nozzle via a stainless steel ring.

[0009] Preferably, the impact ball is made of metal.

[0010] Preferably, the lower end of the aerosol generating chamber is inserted into the solution bottle, and a sealing plug is installed between the lower end of the aerosol generating chamber and the solution bottle.

[0011] Preferably, a bottle mouth pressure cap is installed on the solution bottle.

[0012] Preferably, it further comprises an air inlet nozzle pressure cap, wherein the outer wall of the air inlet nozzle is provided with a retaining ring, the air inlet nozzle pressure cap is screwed onto the aerosol generating chamber through threads and presses the retaining ring onto the aerosol generating chamber.

[0013] Preferably, the annular gas generating device is screwed onto the aerosol generating chamber via threads.

[0014] Compared with the prior art, the advantages and positive effects of the present invention are:

[0015] 1. The aerosol atomizer of the present invention combines jet atomization with impact atomization. The gas and reagent are ejected through the aerosol nozzle together for preliminary atomization, and then impact on the steel balls for further atomization, thereby improving the atomization efficiency and making the droplets fine.

[0016] 2. An annular air generator is installed. The annular airflow can isolate the aerosol from contact with the pipe wall, reduce the loss of aerosol to the inner wall of the pipe, and reduce unnecessary particle loss. The annular airflow helps maintain the flow rate of the aerosol, reduces the flow rate reduction and pressure loss caused by resistance, avoids the aerosol from gathering or stagnating in certain areas, and greatly improves the transportation capacity and quantity of large-particle aerosol.

[0017] 3. The aerosol atomizer adopts a coaxial structure, the aerosol nozzle and the aerosol outlet are coaxial, and the aerosol flows out along a straight path, avoiding turning and interception, thereby improving atomization efficiency and uniformity.

[0018] 4. The aerosol nebulizer is small in size, easy to carry and install, has low air source requirements, stable spray, small and uniform droplets, and high atomization efficiency. The aerosol nebulizer can be used to generate a variety of aerosols, including microorganisms and standard particles of different particle sizes, with a maximum capacity of 10μm standard particle aerosol. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Schematic diagram of the overall structure of the large-particle aerosol nebulizer of the present invention;

[0020] Figure 2 1. It is an internal cross-sectional view of the large-particle aerosol nebulizer of the present invention;

[0021] Figure 3 Schematic diagram of the structure of the atomizing device of the large-particle aerosol atomizer of the present invention;

[0022] In the above figures: 1. Solution bottle; 2. Aerosol generating chamber; 3. Sealing plug; 4. Bottle mouth pressure cap; 5. Air inlet nozzle; 51. Retaining ring; 6. Air inlet nozzle pressure cap; 7. Annular gas generating device; 71. Air inlet end; 72. Contraction cavity; 721. Cylindrical part; 722. Contraction part; 73. Air outlet nozzle; 74. Annular groove; 75. Annular gas inlet; 8. Aerosol nozzle; 9. Impact ball; 10. Liquid inlet pipe; 11. Stainless steel ring. DETAILED DESCRIPTION

[0023] In order to better understand the present invention, the following is a detailed description with reference to the accompanying drawings and embodiments.

[0024] Example: Figure 1 、 Figure 2 As shown, a large-particle aerosol nebulizer includes a solution bottle 1, mounted on an aerosol generating chamber 2. The aerosol generating chamber 2 is T-shaped and hollow. A sealing plug 3 is mounted on the mouth of the solution bottle 1. The lower end of the aerosol generating chamber 2 is inserted into the central hole of the sealing plug 3 to seal and secure the aerosol generating chamber. Furthermore, a bottle cap 4 is screwed onto the mouth of the solution bottle 1, which compresses the sealing plug 3.

[0025] An air inlet nozzle 5 and an air inlet nozzle pressure cap 6 are installed at one end of the aerosol generating chamber 2, and an annular gas generating device 7 is installed at the other end. An aerosol nozzle 8 and an impact ball 9 located in front of the aerosol nozzle 8 are installed in the aerosol generating chamber 2. A retaining ring 51 is provided on the outer wall of the air inlet nozzle 5, and the air inlet nozzle pressure cap 6 is screwed onto the aerosol generating chamber 2 by threads and presses the retaining ring 51 onto the aerosol generating chamber 2 to fix the air inlet nozzle 5. The aerosol nozzle 8 is installed at the outlet end of the air inlet nozzle 5, and the air flow enters the aerosol nozzle 8 through the air inlet nozzle 5; the aerosol nozzle 8 is connected to a liquid inlet pipe 10 extending into the solution bottle 1, and the reagent in the solution bottle 1 enters the nozzle through the liquid inlet pipe 10. As Figure 3 As shown, the impact ball 9 is connected to the aerosol nozzle 8 via an arc-shaped stainless steel ring 11. The aerosol ejected from the nozzle impacts the impact ball 9, further breaking it into finer droplets. The impact ball 9 can be made of metal, ceramic, polytetrafluoroethylene, etc. In this embodiment, a stainless steel ball is used for ease of processing and durability.

[0026] The annular gas generating device 7 sequentially comprises an air inlet 71, a contraction chamber 72, and an air outlet nozzle 73. The air inlet 71 is provided with an annular groove 74, an annular groove 74, and an annular gas inlet 75 connected to the annular groove 74. The open end of the annular groove 74 is connected to the contraction chamber 72. The contraction chamber 72 comprises a cylindrical portion 721 and a contraction portion 722. The cylindrical portion 721 connects to the annular groove 74, allowing the annular gas to flow out smoothly. Thereafter, the annular gas gradually contracts through the contraction portion 722 to the aerosol outlet, allowing the airflow to flow out smoothly. Sheath gas enters the annular groove 74 through the annular gas inlet 75, forming an annular airflow that is ejected into the contraction chamber 72, and the carrier aerosol flows out through the aerosol outlet.

[0027] The aerosol atomizer combines jet atomization with impact atomization. Clean gas enters the aerosol nozzle 8 through the air inlet nozzle 5. The air inlet nozzle 5 and the aerosol nozzle 8 form a variable diameter channel. Due to the Venturi effect, the negative pressure generated when the clean gas passes through the small nozzle draws the reagent in the solution bottle 1 into the aerosol nozzle 8. The gas and reagent are then ejected through the aerosol nozzle 8 for initial atomization. They then impact with the steel balls for further atomization, thereby improving atomization efficiency and producing fine droplets. Another stream of clean gas enters the annular groove 74 of the annular gas generator through the annular gas inlet 75, forming an annular airflow. The aerosol is then ejected through the aerosol outlet and enters the drying stage. The annular airflow isolates the aerosol from contact with the pipe wall, reducing aerosol loss due to the pipe inner wall and unnecessary particle loss. It also helps maintain the aerosol flow rate, reduces flow rate reduction and pressure loss caused by resistance, prevents aerosol aggregation or stagnation in certain areas, and greatly improves the transport capacity and quantity of large-particle aerosol.

[0028] The aerosol atomizer adopts a coaxial structure, the aerosol nozzle 8 is coaxial with the aerosol outlet, and the aerosol flows out along a straight path, avoiding turning and interception, thereby improving atomization efficiency and uniformity.

[0029] This aerosol nebulizer is compact, easy to carry and install, has low air source requirements, produces stable spray, produces fine, uniform droplets, and achieves high atomization efficiency. It can be used to generate a variety of aerosols, including microorganisms and standard particles of varying sizes, up to 10μm in size.

[0030] The above description is merely a preferred embodiment of the present invention and does not constitute any other form of limitation to the present invention. Any person skilled in the art may utilize the technical contents disclosed above to change or modify them into equivalent embodiments with equivalent changes for application in other fields. However, any simple modification, equivalent change, and modification of the above embodiments made in accordance with the technical essence of the present invention without departing from the technical solution of the present invention shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A large-particle aerosol nebulizer, characterized by: The device comprises a solution bottle, an aerosol generating chamber is installed on the solution bottle, an aerosol nozzle and an impact ball located in front of the aerosol nozzle are installed in the aerosol generating chamber, and the aerosol nozzle is connected to a liquid inlet pipe extending into the solution bottle; An air inlet nozzle is provided at one end of the aerosol generating chamber, and an annular air generating device is provided at the other end. The annular air generating device includes an air inlet end, a contraction cavity and an air outlet nozzle. The air inlet end is provided with an annular groove and an annular air inlet connected to the annular groove.

2. The large-particle aerosol nebulizer according to claim 1, characterized in that: The contraction cavity includes a cylindrical portion and a contraction portion.

3. The large-particle aerosol nebulizer according to claim 1, characterized in that: The aerosol nozzle is installed at the outlet end of the air inlet nozzle.

4. The large-particle aerosol nebulizer according to claim 1, characterized in that: The impact ball is connected to the aerosol nozzle via a stainless steel ring.

5. The large-particle aerosol nebulizer according to claim 1, characterized in that: The impact ball is made of metal.

6. The large-particle aerosol nebulizer according to claim 1, characterized in that: The lower end of the aerosol generating chamber is inserted into the solution bottle, and a sealing plug is installed between the lower end of the aerosol generating chamber and the solution bottle.

7. The large-particle aerosol nebulizer according to claim 1, characterized in that: The solution bottle is provided with a bottle mouth pressing cap.

8. The large-particle aerosol nebulizer according to claim 1, characterized in that: It also includes an air inlet nozzle pressure cap, the outer wall of the air inlet nozzle is provided with a retaining ring, the air inlet nozzle pressure cap is screwed on the aerosol generating chamber through threads and presses the retaining ring on the aerosol generating chamber.

9. The large-particle aerosol nebulizer according to claim 1, characterized in that: The annular gas generating device is screwed onto the aerosol generating chamber via threads.

Images