CN111482294A

CN111482294A - Atomizer and aerosol particle filter detection device

Info

Publication number: CN111482294A
Application number: CN202010344410.3A
Authority: CN
Inventors: 吴兆良; 王飞; 王川经; 易雅谊; 朱帅
Original assignee: Qingdao Junray Intelligent Instrument Co Ltd
Current assignee: Qingdao Junray Intelligent Instrument Co Ltd
Priority date: 2020-04-27
Filing date: 2020-04-27
Publication date: 2020-08-04
Anticipated expiration: 2040-04-27
Also published as: CN111482294B

Abstract

The invention discloses a sprayer and an aerosol particle filtering and detecting device, wherein the sprayer comprises a shell spraying assembly and a locking part, a cavity is formed in the shell, an aerosol particle outlet is formed in one end of the shell, the spraying assembly comprises a spraying head, a gas supply pipeline and a liquid supply pipeline, the spraying head is detachably connected with the shell, and the locking part locks the spraying head and the shell. An aerosol particle generating chamber is formed within the sprayhead opposite the aerosol particle outlet. The gas jet flow and the liquid jet flow in the aerosol particle generating cavity interact to form aerosol particles, the aerosol particles within the set particle size range are sprayed out through the aerosol particle outlet, and the aerosol particles outside the set particle size range fall into the cavity. The aerosol particles output by the sprayer are stable and have small particle size deviation, and the detection result of the aerosol particle filtering detection device is improved. The shell and the spraying assembly are of detachable structures, and are convenient to process, disassemble and assemble.

Description

Atomizer and aerosol particle filter detection device

Technical Field

The invention relates to the technical field of particle filtration detection, in particular to a sprayer and an aerosol particle filtration detection device.

Background

The airflow type sprayer disperses liquid into small fog drops by utilizing high-speed airflow, and has various structural forms. Most of the existing airflow type sprayers can only achieve the function of dispersing liquid into small fog drops, all aerosol particles with all generated particle sizes are output, the average particle size is difficult to adjust, the geometric standard deviation of the particle sizes is large, and the aerosol particles with stable average particle size and small particle size deviation are difficult to output. When the airflow type sprayer is applied to the detection of the mask bacteria filtering efficiency, the detection result has larger error.

During the flu season or virus outbreaks, such as new coronaviruses, people need to wear masks to prevent bacterial/viral infections. Mask manufacturers need to constantly improve mask quality and improve the filtration efficiency of masks against bacteria/viruses to ensure the safety of the public. Therefore, there is an urgent need for a device for filtering and detecting aerosol particles with more accurate detection result to improve the quality of the mask.

The above information disclosed in this background section is only for enhancement of understanding of the background of the application and therefore it may comprise prior art that does not constitute known to a person of ordinary skill in the art.

Disclosure of Invention

The invention provides a sprayer and an aerosol particle filtering and detecting device, aiming at the problems pointed out in the background art, the sprayer is stable in output aerosol particles and small in particle size deviation, the detection result of the aerosol particle filtering and detecting device is improved, and a shell and a spraying assembly in the sprayer are of detachable structures and are convenient to process, disassemble and assemble.

In order to realize the purpose of the invention, the invention is realized by adopting the following technical scheme:

the present invention provides a sprayer comprising: the aerosol particle filter comprises a shell, a filter body and a filter cover, wherein a cavity is formed in the shell, and an aerosol particle outlet communicated with the cavity is formed in one end of the shell; a spray assembly, comprising: the atomizing head is detachably connected with the shell, an aerosol particle generating cavity communicated with the cavity is formed in the atomizing head, and the aerosol particle generating cavity is opposite to the aerosol particle outlet; a gas supply line connected to the sprayhead and communicating with the aerosol particle generating chamber for providing a gas jet to the aerosol particle generating chamber; a liquid supply line connected to the sprayhead and communicating with the aerosol particle generating chamber for providing a liquid jet to the aerosol particle generating chamber; the aerosol particles are sprayed out from the aerosol particle outlet in a set particle size range, and the aerosol particles outside the set particle size range fall into the cavity; the sprayer also includes a locking portion for locking the spray head and the housing in place.

In some embodiments of the present application, the housing is provided with an extension portion, the extension portion is a hollow structure and extends toward the outer side of the housing, and the spray head penetrates through the extension portion and has a portion exposed out of the extension portion; the locking part is a hollow sleeve, and the locking part is sleeved on the peripheries of the extension part and the spray head and locks and fixes the extension part and the spray head.

In some embodiments of the present application, an outer peripheral wall of the extension portion is provided with an external thread; the outer peripheral wall of the spray head is provided with a first stopping part along the circumferential direction; the inner circumferential wall of the locking part is provided with internal threads, one end of the locking part is provided with a second stopping part along the circumferential direction of the locking part, and the second stopping part extends towards the spray head; the spray head penetrates through the extension part, the first stopping part is abutted to the end part of the extension part, the external thread is matched with the internal thread, the locking part is screwed on the periphery of the extension part, and the second stopping part is positioned on the outer side of the first stopping part and abutted to the first stopping part.

In some embodiments of the present application, the aerosol particle generating chamber includes a generating chamber i and a generating chamber ii which are communicated, the diameter of the generating chamber i is smaller than that of the generating chamber ii, and the generating chamber ii is communicated with the cavity; the gas supply pipeline inputs gas jet flow into the generating cavity I, the liquid supply pipeline inputs liquid jet flow into the generating cavity I, the gas jet flow and the liquid are mixed in the generating cavity I to form a gas-liquid mixture, and the gas-liquid mixture passes through the generating cavity II to form aerosol particles.

In some embodiments of the present application, the generating cavity ii is a tapered cavity, and a diameter of the generating cavity ii gradually increases toward a direction close to the aerosol particle outlet.

In some embodiments of the present application, a first mounting cavity, a second mounting cavity and a liquid conveying section are further formed in the spray head, and the liquid conveying section communicates the generation cavity i and the second mounting cavity; the gas supply pipeline is arranged in the first mounting cavity, and a gas outlet of the gas supply pipeline is opposite to the generation cavity I; the liquid supply pipeline is arranged in the second mounting cavity, and a liquid outlet of the liquid supply pipeline is opposite to the liquid conveying section.

In some embodiments of the present application, an orifice plate is detachably disposed at an end of the first installation cavity close to the generation cavity i.

In some embodiments of the present application, a tapered section is formed in the first installation cavity at an end thereof adjacent to the generation cavity i.

In some embodiments of the present application, the liquid jet supplied by the liquid supply line is emitted downstream of the gas jet supplied by the gas supply line.

The invention also provides an aerosol particle filtering and detecting device which comprises the sprayer.

Compared with the prior art, the invention has the advantages and positive effects that:

in the atomizer disclosed in this application, provide the gas efflux in the aerosol particle produces the chamber by gas supply pipeline, provide the liquid efflux in the aerosol particle produces the chamber by liquid supply pipeline, gas efflux and liquid efflux take place the friction, and the liquid efflux is drawn into a strip of slender silk by the gas efflux, and these slender silk break off very fast at thinner department and form spherical droplet, and the droplet is carried by the gas efflux, forms aerosol particle at last. In the process that aerosol particles are sprayed towards the direction close to the aerosol particle outlet, the movement tracks of the aerosol particles with different particle sizes are different under the action of gravity. Because aerosol particle export and aerosol particle produce and have the certain distance between the chamber, aerosol particle export has the screening effect to the aerosol particle about to spout, and only set for the aerosol particle within the particle size range can spout through aerosol particle export, and the aerosol particle outside the particle size range of setting then falls into the cavity after and discharges. The aerosol particles output by the sprayer are stable and have small particle size deviation, and the detection result of the aerosol particle filtering detection device is improved.

Through adjusting the distance between aerosol particle export and the aerosol particle production chamber, can screen the aerosol particle of different particle diameter scopes to make this atomizer can output the aerosol particle of different particle diameters and distribution range, improve the suitability of atomizer, satisfy the different detection demands of aerosol particle filtration detection device.

The spraying assembly and the shell are of a detachable structure, so that the shell and the spraying assembly can be assembled after being independently processed and produced, and the locking part is used for realizing the connection reliability between the spraying assembly and the shell, so that the spraying assembly and the shell are convenient to process and disassemble.

The dismantlement structure between spraying subassembly and the casing is convenient for change the spraying subassembly of different grade type, and the spraying subassembly of different grade type can produce the aerosol particle of different particle size, further improves the particle size range of the aerosol particle that this atomizer can spun, improves the suitability of atomizer, satisfies the different detection demands of aerosol particle filtration detection device.

Other features and advantages of the present invention will become more apparent from the following detailed description of the invention when taken in conjunction with the accompanying drawings.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic structural view of a first embodiment of the sprayer according to the present invention;

FIG. 2 is a schematic diagram of the movement trajectory of aerosol particles in the aerosol dispenser of FIG. 1;

FIG. 3 is a schematic structural view of a second embodiment of the sprayer according to the invention;

FIG. 4 is a schematic view of the spray assembly of an embodiment of the sprayer of the present invention shown in FIG. 1;

FIG. 5 is a schematic diagram of the spray assembly of an embodiment of the sprayer of the present invention shown in FIG. 2;

FIG. 6 is a schematic diagram of the spray assembly of an embodiment of the sprayer of the present invention shown in FIG. 3;

FIG. 7 is a schematic diagram of the spray assembly of an embodiment of the sprayer of the invention shown in FIG. 4;

FIG. 8 is a schematic view of the housing of the sprayer embodiment of the invention shown in FIG. 1;

FIG. 9 is a schematic view of the housing of the sprayer embodiment of the invention shown in FIG. 2;

FIG. 10 is a schematic view of the housing of an embodiment of the sprayer of the invention shown in FIG. 3;

FIG. 11 is a schematic view of the housing of an embodiment of the sprayer of the invention shown in FIG. 4;

FIG. 12 is a graph of the average particle size of aerosol particles produced by different orifice plates used in embodiments of nebulizers of the present invention;

FIG. 13 shows particle size screening ranges for aerosol particles under different sized housings in accordance with an embodiment of the invention.

Reference numerals:

100-housing, 110-cavity, 120-extension, 121-external thread, 130-aerosol particle outlet, 140-liquid discharge port;

200-a spray assembly, 210-a spray head, 211-a first stop, 220-a gas supply line, 230-a liquid supply line, 240-an aerosol particle generation chamber, 241-a generation chamber i, 242-a generation chamber ii, 243-a generation chamber iii, 244-a small conical section, 250-a liquid delivery section, 260-a first installation chamber, 270-a second installation chamber, 280-an orifice plate, 290-a conical section;

300-locking part, 310-internal thread, 320-second stop;

410-a first seal ring, 420-a second seal ring, 430-a third seal ring, 440-a fourth seal ring, 450-a fifth seal ring, 460-a seal screw.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "inside", "outside", etc. are based on the directions or positional relationships shown in the drawings, which are for convenience of description only, and do not indicate or imply that the device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," "fourth," and "fifth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Referring to fig. 1, the nebulizer in the present embodiment mainly includes a housing 100 and a nebulizer assembly 200, and the nebulizer is an air flow type nebulizer and can be applied to an aerosol particle filtering detection device, such as a mask filtering detection device, to provide aerosol particles required for a detection process.

A cavity 110 is formed in the housing 100, and an aerosol particle outlet 130 is formed at one end of the housing 100, and the aerosol particle outlet 130 is communicated with the cavity 110.

The spray assembly 200 is disposed at the other end of the housing 100 opposite the aerosol particle outlet 130. The spray assembly 200 mainly includes an aerosol particle generating chamber 240, a gas supply line 220, and a liquid supply line 230.

The aerosol particle generating chamber 240 is in communication with the cavity 110, and the gas supply line 220 and the liquid supply line 230 are each in communication with the aerosol particle generating chamber 240, respectively. The gas supply line 220 provides a gas jet to the aerosol particle generating chamber 240 and the liquid supply line 230 provides a liquid jet to the aerosol particle generating chamber 240.

The gas jet and the liquid jet are rubbed, the liquid jet is pulled into a strip of slender filaments by the gas jet, the slender filaments are quickly broken at thinner parts to form spherical droplets, and the droplets are entrained by the gas jet to finally form aerosol particles. Referring to fig. 2 again, in the process of spraying aerosol particles toward the direction close to the aerosol particle outlet 130, the aerosol particles with different particle sizes have different movement trajectories under the action of gravity. Because there is a certain distance between the aerosol particle outlet 130 and the aerosol particle generating chamber 240, the aerosol particle outlet 130 has a screening function on the aerosol particles sprayed out from the aerosol particle generating chamber 240, only the aerosol particles within a set particle size range can be sprayed out through the aerosol particle outlet 130, and the aerosol particles outside the set particle size range fall into the cavity 110 and are discharged.

Taking fig. 2 as an example, aerosol particles with a particle size range b-d can be ejected through the aerosol particle outlet 130, and aerosol particles (a, e, f, g) with particle sizes outside the range b-d fall into the cavity 110 after touching the inner wall of the housing 100.

The aerosol particles output by the sprayer are stable and have small particle size deviation, and the detection result of the aerosol particle filtering detection device is improved.

Through adjusting the distance between aerosol particle outlet 130 and aerosol particle generation cavity 240, can screen the aerosol particle of different particle diameter scopes to make this atomizer can output the aerosol particle of different particle diameters and distribution range, improve the suitability of atomizer, satisfy the different detection demands of aerosol particle filtration detection device.

In some embodiments of the present application, referring to fig. 1, the aerosol particle generating chamber 240 includes a generating chamber i 241 and a generating chamber ii 242 which are communicated, the diameter of the generating chamber i 241 is smaller than that of the generating chamber ii 242, and the generating chamber ii 242 is communicated with the cavity 110, that is, the generating chamber ii 242 is closer to the side of the cavity 110 than the generating chamber i 241.

The gas supply pipeline 220 inputs gas jet flow into the generating cavity I241, the liquid supply pipeline 230 inputs liquid jet flow into the generating cavity I241, the gas jet flow and the liquid jet flow are firstly mixed in the generating cavity I241 to form gas-liquid mixture, the gas-liquid mixture flows through the generating cavity II 242, aerosol particles are formed under the action of diffusion flow and turbulent flow, and then the aerosol particles are sprayed into the cavity 110.

The two-stage structure of the aerosol particle generating chamber 240 helps to improve the uniformity and quality of aerosol particle generation.

In some embodiments, the generating chamber ii 242 is a tapered chamber, and the diameter of the generating chamber ii 242 gradually increases toward the aerosol particle outlet 130. The conical generation cavity II 242 contributes to forming diffusion flow and turbulent flow, so that the gas-liquid mixture flowing through the generation cavity II 242 can form aerosol particles with stable particle size and small deviation.

The aerosol particle generating cavity 240 has other structural forms, in other embodiments, for example as shown in fig. 4, the aerosol particle generating cavity 240 is a three-section structure, which includes a generating cavity i 241, a generating cavity ii 242 and a generating cavity iii 243, which are connected in sequence, wherein the generating cavity ii 242 and the generating cavity iii 243 are both cone-shaped structures, the diameters of which are gradually increased towards the direction close to the cavity 110, and the taper of the generating cavity ii 242 is greater than that of the generating cavity iii 243. The three-section structure can further improve the particle size stability of aerosol particles and reduce particle size deviation. As shown in fig. 5, a small tapered section 244 is formed at one end of the generating chamber i 241 close to the generating chamber ii 242 to guide the flow of the gas-liquid mixture to the generating chamber ii 242 side.

In some embodiments of the present application, referring to fig. 1, the spray assembly 200 further comprises a spray head 210, the spray head 210 having an aerosol particle generating chamber 240 formed therein. The spray head 210 is also internally provided with a first mounting cavity 260, a second mounting cavity 270 and a liquid conveying section 250, wherein the liquid conveying section 250 is communicated with the generation cavity I241 and the second mounting cavity 270. The gas supply line 220 is provided in the first installation chamber 260, and a gas outlet of the gas supply line 220 faces the generation chamber i 241 to supply a gas jet to the generation chamber i 241. The liquid supply line 230 is disposed in the second installation cavity 270, and a liquid outlet of the liquid supply line 230 faces the liquid conveying section 250 so as to supply liquid to the liquid conveying section 250. The gas emitted from the gas outlet of the gas supply line 220 directly enters the generation chamber i 241, and the liquid emitted from the liquid outlet of the liquid supply line 230 enters the generation chamber i 241 through the liquid conveying section 250.

The flow rate of the liquid jet is determined by the supply flow rate and the aperture of the liquid delivery section 250. Referring to fig. 1, a sealing screw 460 is provided at the fabrication hole formed for fabricating the liquid delivery segment 250, for sealing the fabrication hole to prevent the liquid from leaking.

A third packing 430 is disposed between the liquid supply line 230 and the second installation cavity 270 to prevent the liquid from leaking.

In other embodiments, referring to FIG. 7, the liquid delivery section 250 may also be in communication with the generation chamber II 242, where the generation chamber I241 functions as a gas delivery, and where the diameter of the generation chamber I241 is not oversized to facilitate providing a gas jet to the generation chamber II 242. The liquid jet flow and the gas jet flow are mixed in the generating cavity II 242 to form aerosol particles.

In some embodiments, referring to fig. 1, an orifice plate 280 is detachably disposed at an end of the first installation chamber 260 adjacent to the generation chamber i 241, and the gas output from the gas supply line 220 flows into the generation chamber i 241 through the orifice plate 280. The flow rate of the gas jet is determined by the supply gas flow and the aperture of the orifice plate 280.

By replacing the orifice plate 280 with a different pore size, the average particle size of the aerosol particles produced can be varied. Fig. 12 shows the average diameters of aerosol particles generated by using three different pore size pore plates, d1, d2 and d 3.

With continued reference to fig. 1, a first sealing ring 410 is disposed in the first mounting chamber 260, and the first sealing ring 410 is disposed between the orifice plate 280 and the gas supply line 220 to prevent gas leakage. Meanwhile, due to the existence of the first sealing ring 410, a gas buffer cavity is formed between the orifice plate 280 and the gas outlet of the gas supply line 220, which helps to improve the fluidity of the gas.

In other embodiments, referring to FIG. 3, a tapered section 290 is formed in the first mounting chamber 260 adjacent to the end of the generating chamber I241, and the tapered section 290 functions in the same manner as the orifice plate 280 described above. Aerosol particles of different sizes can also be produced by varying the aperture at the junction of the conical section 290 and the generation chamber i 241.

With the tapered section 290 in use, and with continued reference to FIG. 3, a second gasket 420 is disposed between the gas supply line 220 and the first mounting chamber 260 to prevent gas leakage.

In some embodiments of the present application, referring to fig. 1, the liquid jet supplied from the liquid supply line 230 is ejected downstream of the gas jet supplied from the gas supply line 220, thereby facilitating the drawing of the liquid jet into an elongated filament by the gas jet, thereby forming aerosol particles.

In some embodiments of the present application, referring to fig. 6, an acute angle is formed between the incident direction of the liquid jet and the incident direction of the gas jet, and the incident direction of the liquid jet is inclined toward the direction close to the cavity 110, that is, the liquid conveying section 250 is inclined toward the direction close to the cavity 110, so that the acting area between the gas jet and the liquid jet is larger, and the effect of the gas jet on the liquid jet is more obvious.

Many variations and combinations of aerosol particle generation chamber 240 and liquid transport section 250 can form a variety of spray assemblies of different configurations. Fig. 4-7 illustrate a spray assembly 200 in four variations. The spray assembly 200 shown in fig. 4-7 is illustrated by using the orifice plate 280, and in other embodiments, in the case of using the tapered section 290, various modifications and combinations are performed on the aerosol particle generating chamber 240 and the liquid conveying section 250, so that spray assemblies 200 with various structures can be obtained, and further description and illustration are omitted.

The aerosol particle outlet 130 can also have a variety of configurations. In some embodiments of the present application, referring to fig. 1, a portion of the aerosol particle outlet 130 extends outward from the housing 100, and another portion extends inward from the housing 100. In other embodiments, such as in fig. 8, the aerosol particle outlet 130 extends completely outside the housing 100; as another example, in fig. 9, the aerosol particle outlet 130 extends completely inward of the housing 100.

The shell 100 also has various structural forms, and in some embodiments of the present application, referring to fig. 1, the shell 100 has a round-belly structure with two narrow ends and a wide middle. In other embodiments, such as in FIG. 11, the housing 100 is rectangular in configuration.

In some embodiments of the present disclosure, the bottom of the housing 100 is provided with a liquid outlet 140 communicating with the cavity 110, and aerosol particles not ejected from the aerosol particle outlet 130 fall down after contacting with the inner wall of the housing 100, and are finally discharged through the liquid outlet 140.

In other embodiments, the housing 100 may not have a liquid outlet, and with reference to fig. 10 and 11, the liquid deposited in the housing 100 may be poured out of the aerosol particle outlet 130 by pouring after the sprayer is used for a period of time.

In some embodiments of the present application, referring to fig. 1, a spray head 210 is removably attached to the housing 100. The sprayer further comprises a locking portion 300, and the locking portion 300 is used for locking and fixing the spray head 210 and the housing 100.

The casing 100 in this application is glass work piece, and spraying assembly 200 is the machined part, and in actual production, casing 100 and spraying assembly 200 can be assembled after processing production alone, realizes the reliability of being connected between spraying assembly 200 and casing 100 through locking portion 300, and be convenient for processing and dismouting.

The disassembly structure between the spraying assembly 200 and the shell 100 is convenient for replace the spraying assembly 200 of different types, the spraying assembly 200 of different types can generate aerosol particles with different particle sizes, the particle size range of the aerosol particles which can be sprayed by the sprayer is further improved, the applicability of the sprayer is improved, and different detection requirements of the aerosol particle filtering and detecting device are met.

In some embodiments of the present application, with reference to fig. 1, the housing 100 is provided with an extension portion 120, and the extension portion 120 is a hollow structure and extends toward the outside of the housing 100. The spray head 210 is disposed through the extension 120 and partially exposed from the extension 120. The locking part 300 is a hollow sleeve, and the locking part 300 is sleeved on the outer peripheries of the extension part 120 and the spray head 210 to lock and fix the extension part 120 and the spray head 210. Simple structure, the dismouting of the atomising head 210 of being convenient for.

As a specific example, the outer circumferential wall of the extension 120 is provided with an external thread 121; the outer peripheral wall of the spray head 210 is provided with a first stopper 211 along the circumferential direction thereof; the inner circumferential wall of the locking part 300 is provided with an internal thread 310, one end of the locking part 300 is provided with a second stopping portion 320 along the circumferential direction thereof, and the second stopping portion 320 extends toward the spray head 210. When the spray assembly 200 is installed, the spray head 210 is inserted into the extension part 120, and the first stopper part 211 abuts against the end of the extension part 120; then, the locking part 300 is sleeved on the periphery of the extension part 120, and the external thread 121 is matched with the internal thread 310, so that the locking part 300 is fixed with the extension part 120; at this time, the second stopping portion 270 is located outside the first stopping portion 211 and abuts against the first stopping portion 211, and the first stopping portion 211 is limited between the end of the extending portion 120 and the second stopping portion 320, so as to fix the spray head 210.

A fourth sealing ring 440 is disposed between the outer circumferential wall of the spray head 210 and the inner circumferential wall of the extension 120 to prevent the aerosol particles in the cavity 110 from leaking out.

The outer peripheral wall of the spray head 210 is further provided with a fifth sealing ring 450, and the fifth sealing ring 450 is located outside the second stopping portion 320, so that the sealing performance of the whole spray assembly 200 is further improved.

In summary, the nebulizer described above can adjust the amount of aerosol particles produced by the nebulizer by changing the flow rate of gas provided by the gas supply line 220 and the flow rate of liquid provided by the liquid supply line 230. By replacing the orifice plate 250 with a different orifice size, the average particle size of the aerosol produced by the nebulizer can be adjusted. By adjusting the geometry of the housing 100, the distance between the aerosol particle outlet 130 and the aerosol particle generating chamber 240, aerosol particles of different particle size ranges can be screened to enable the nebulizer to output aerosol particles of different particle sizes and distribution ranges.

Referring to fig. 13, the corresponding geometry of the housing 100 is adjusted to allow aerosol particles having a size between d1 and d2 to pass through; another geometric dimension of the housing 100 is adjusted to allow aerosol particles having a particle size between d3 and d4 to pass through, but the distribution width of the particle sizes is significantly narrower than the widths of d1 and d 2.

The application also discloses an aerosol particle filtering and detecting device which comprises the sprayer disclosed by the embodiment.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. A nebulizer, comprising:

the aerosol particle filter comprises a shell, a filter body and a filter cover, wherein a cavity is formed in the shell, and an aerosol particle outlet communicated with the cavity is formed in one end of the shell;

a spray assembly, comprising:

the atomizing head is detachably connected with the shell, an aerosol particle generating cavity communicated with the cavity is formed in the atomizing head, and the aerosol particle generating cavity is opposite to the aerosol particle outlet;

a gas supply line connected to the sprayhead and communicating with the aerosol particle generating chamber for providing a gas jet to the aerosol particle generating chamber;

a liquid supply line connected to the sprayhead and communicating with the aerosol particle generating chamber for providing a liquid jet to the aerosol particle generating chamber;

the aerosol particles are sprayed out from the aerosol particle outlet in a set particle size range, and the aerosol particles outside the set particle size range fall into the cavity;

the sprayer also includes a locking portion for locking the spray head and the housing in place.

2. The nebulizer of claim 1,

the shell is provided with an extension part which is of a hollow structure and extends towards the outer side of the shell, and the spray head penetrates through the extension part and is partially exposed out of the extension part;

the locking part is a hollow sleeve, and the locking part is sleeved on the peripheries of the extension part and the spray head and locks and fixes the extension part and the spray head.

3. The nebulizer of claim 2,

the outer peripheral wall of the extension part is provided with an external thread;

the outer peripheral wall of the spray head is provided with a first stopping part along the circumferential direction;

the inner circumferential wall of the locking part is provided with internal threads, one end of the locking part is provided with a second stopping part along the circumferential direction of the locking part, and the second stopping part extends towards the spray head;

the spray head penetrates through the extension part, the first stopping part is abutted to the end part of the extension part, the external thread is matched with the internal thread, the locking part is screwed on the periphery of the extension part, and the second stopping part is positioned on the outer side of the first stopping part and abutted to the first stopping part.

4. The nebulizer of claim 1,

the aerosol particle generating cavity comprises a generating cavity I and a generating cavity II which are communicated, the diameter of the generating cavity I is smaller than that of the generating cavity II, and the generating cavity II is communicated with the cavity;

the gas supply pipeline inputs gas jet flow into the generating cavity I, the liquid supply pipeline inputs liquid jet flow into the generating cavity I, the gas jet flow and the liquid are mixed in the generating cavity I to form a gas-liquid mixture, and the gas-liquid mixture passes through the generating cavity II to form aerosol particles.

5. The nebulizer of claim 4,

the generating cavity II is a conical cavity, and the diameter of the generating cavity II is gradually increased towards the direction close to the aerosol particle outlet.

6. The nebulizer of claim 4,

a first mounting cavity, a second mounting cavity and a liquid conveying section are formed in the spray head, and the liquid conveying section is communicated with the generation cavity I and the second mounting cavity;

the gas supply pipeline is arranged in the first mounting cavity, and a gas outlet of the gas supply pipeline is opposite to the generation cavity I;

the liquid supply pipeline is arranged in the second mounting cavity, and a liquid outlet of the liquid supply pipeline is opposite to the liquid conveying section.

7. The nebulizer of claim 6,

one end that is close to in the first installation cavity produces chamber I detachably is equipped with the orifice plate.

8. The nebulizer of claim 6,

a conical section is formed in one end, close to the generation cavity I, of the first installation cavity.

9. The nebulizer of any one of claims 1 to 8,

the liquid jet input by the liquid supply pipeline is sprayed out at a position which is positioned at the downstream of the gas jet input by the gas supply pipeline.

10. An aerosol particle filtration test device comprising a nebulizer as claimed in any one of claims 1 to 9.