CN113813887A - Salt aerosol generator for filtering efficiency test of filter material - Google Patents
Salt aerosol generator for filtering efficiency test of filter material Download PDFInfo
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- CN113813887A CN113813887A CN202111006522.9A CN202111006522A CN113813887A CN 113813887 A CN113813887 A CN 113813887A CN 202111006522 A CN202111006522 A CN 202111006522A CN 113813887 A CN113813887 A CN 113813887A
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- 239000000443 aerosol Substances 0.000 title claims abstract description 41
- 238000012360 testing method Methods 0.000 title claims abstract description 28
- 150000003839 salts Chemical class 0.000 title claims abstract description 17
- 239000000463 material Substances 0.000 title claims abstract description 13
- 238000001914 filtration Methods 0.000 title claims description 15
- 239000007788 liquid Substances 0.000 claims abstract description 139
- 238000001514 detection method Methods 0.000 claims abstract description 15
- 238000002347 injection Methods 0.000 claims abstract description 14
- 239000007924 injection Substances 0.000 claims abstract description 14
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims abstract description 12
- 239000011780 sodium chloride Substances 0.000 claims abstract description 12
- 238000007789 sealing Methods 0.000 claims abstract description 5
- 238000005192 partition Methods 0.000 claims description 23
- 238000002955 isolation Methods 0.000 claims description 9
- 238000012423 maintenance Methods 0.000 claims description 2
- 239000003814 drug Substances 0.000 abstract description 33
- 239000002245 particle Substances 0.000 description 23
- 230000000694 effects Effects 0.000 description 7
- 239000003595 mist Substances 0.000 description 7
- 239000007789 gas Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000001133 acceleration Effects 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 239000006096 absorbing agent Substances 0.000 description 1
- 239000005427 atmospheric aerosol Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J13/00—Colloid chemistry, e.g. the production of colloidal materials or their solutions, not otherwise provided for; Making microcapsules or microballoons
- B01J13/0095—Preparation of aerosols
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/0806—Details, e.g. sample holders, mounting samples for testing
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N2015/084—Testing filters
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- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Nozzles (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention discloses a saline aerosol generator for filter efficiency test of filter materials, which comprises a shell, wherein four corners of the lower end of the shell are fixedly provided with pad feet, the middle part of the right end of the shell is fixedly provided with a connecting pipe, the right end of the connecting pipe is provided with a nozzle, the right part of the upper end of the shell is fixedly provided with a liquid injection port, the upper end of the liquid injection port is in threaded connection with a sealing cover, the upper part of the right end of the shell is fixedly provided with a pressure detection meter, the input end of the pressure detection meter extends into the shell, and the middle part of the upper end of the shell is fixedly provided with two bilaterally symmetrical mounting seats. According to the salt aerosol generator for the filter efficiency test, the liquid storage tank, the generating mechanism, the connecting pipe and the nozzle are arranged to form aerosol, the forming efficiency and quality of the aerosol are improved, the funnel-shaped groove and the spiral air passage are arranged to cooperate with each other to realize the pre-accelerating function of high-speed air flow, and the forming efficiency of aerosol-state liquid medicine is further improved by arranging the liquid return plate and the through hole.
Description
Technical Field
The invention relates to the technical field of aerosol generators, in particular to a saline aerosol generator for testing filtering efficiency of filter materials.
Background
Aerosol generators are suspensions of liquid or solid particles in air. They can act as condensation nuclei for water droplets and ice crystals (see atmospheric condensation nuclei, atmospheric ice nuclei), absorbers and scatterers of solar radiation, and participate in various chemical cycles, and are an important component of the atmosphere. Fog, smoke, haze, light fog (mist), dust, smoke, etc., are all atmospheric aerosols, whether natural or man-made.
The working principle of the salt aerosol generator is as follows: compressed air or oxygen (driving force) passes through the fine nozzle by high-speed airflow, negative pressure is generated around the nozzle according to the Venturi effect to carry liquid medicine in the liquid storage tank to be entrained into the high-speed airflow and crush the high-speed airflow into fog drops with different sizes, wherein more than 99% of the fog drops are formed by large-particle fog drops, fine fog particles which fall back into the liquid storage tank by the interception and collision of the nozzle are ejected at high speed, and the collided particles are re-atomized. The fine mist particles form aerosol liquid medicine particles in the air, the particle spectrum diameter is from 5 mu m to 100 mu m (determined by different nozzles), the particle size is stable, and the aerosol liquid medicine particles can float in the air for a long time.
In the existing salt aerosol generator for filtering efficiency test of filter materials, because the volume of a liquid storage tank is a certain value, along with the consumption of liquid medicine in the liquid storage tank, the volume of compressed air in the liquid storage tank is increasingly large, the pressure of high-speed airflow sprayed out from a nozzle is reduced, the output efficiency and the quality of fog particles are reduced, along with the consumption of the liquid medicine in the liquid storage tank, the depth of the liquid medicine is gradually reduced, the contact area of the central part of the high-speed airflow and the liquid medicine is reduced, the amount of the liquid medicine carried by the high-speed airflow is reduced, finally, the fog particles formed through the nozzle are reduced, and the use requirement of the filter efficiency test of the filter materials cannot be met.
Disclosure of Invention
The invention mainly aims to provide a saline aerosol generator for testing filtering efficiency of filter materials, which can effectively solve the problems in the background technology.
In order to achieve the purpose, the invention adopts the technical scheme that:
a saline aerosol generator for testing filtering efficiency of filter materials comprises a shell, wherein four corners of the lower end of the shell are fixedly provided with foot pads, the middle part of the right end of the shell is fixedly provided with a connecting pipe, the right end of the connecting pipe is provided with a nozzle, the right part of the upper end of the shell is fixedly provided with a liquid injection port, the upper end of the liquid injection port is in threaded connection with a sealing cover, the upper part of the right end of the shell is fixedly provided with a pressure detection meter, the input end of the pressure detection meter extends into the shell, the middle part of the upper end of the shell is fixedly provided with two bilaterally symmetrical mounting seats, the upper ends of the two mounting seats are jointly and movably connected with a handle, the upper part of the left end of the shell is provided with a generating mechanism which extends into the shell, the left lower part of the front end of the shell is fixedly provided with an operating panel, the shell left end lower part has the access panel through bolted connection, the embedding of shell rear end right part has the observation piece.
Preferably, the left end of the shell is provided with a mounting groove, the mounting groove is positioned right of the maintenance plate, a controller is fixedly mounted on the lower wall of the mounting groove, a liquid storage tank is arranged inside the shell and is of a cylindrical structure, the right wall of the liquid storage tank is provided with a funnel-shaped groove, the inner wall of the funnel-shaped groove is provided with a spiral air passage, the right end of the funnel-shaped groove is communicated with a connecting pipe, the right part of the inner wall of the funnel-shaped groove is fixedly provided with a liquid return plate, the left end of the liquid return plate is provided with a plurality of through holes which are communicated left and right, and the plurality of through holes are distributed in an annular array.
Preferably, the controller is electrically connected with the generating mechanism, the pressure detecting meter and the operation panel.
Preferably, the inner wall of the liquid storage tank is provided with four sliding chutes which are distributed in an annular array, the length of each sliding chute is equal to that of the liquid storage tank, the rear part of the inner wall of the liquid storage tank is provided with an observation window groove, the upper part of the left wall of the liquid storage tank is provided with an opening, the left end face of the opening extends to the left end face of the shell, the upper part of the inner wall of the liquid storage tank is provided with a liquid inlet hole, and the liquid inlet hole is communicated with the liquid injection port.
Preferably, the generating mechanism comprises an electric push rod, the upper end of the electric push rod is fixedly connected with the upper wall of the mounting groove, the output end of the electric push rod penetrates through the right wall of the mounting groove and is fixedly provided with a partition board, the partition board is positioned in the liquid storage groove, four sliding blocks are fixedly arranged on the outer surface of the partition board and are respectively in sliding connection with four sliding grooves, the partition board is of a left thick structure and a right thin structure and is matched with a funnel-shaped groove, a sleeve is fixedly arranged on the upper portion of the left end of the partition board and is movably connected with an opening, an air pipe is arranged in the sleeve, the right end of the air pipe penetrates through the partition board and is fixedly provided with an air outlet head, the left end of the air pipe is fixedly provided with a connector, and the length of the sleeve is equal to that of the liquid storage groove.
Preferably, the upper part of the inclined plane at the right end of the isolation plate is provided with a placing hole, the gas outlet head is positioned in the placing hole, and the outer surface of the gas outlet head is fixedly connected with the inner wall of the placing hole.
Preferably, the inner wall of the connecting pipe is carved with an internal thread, an external thread pipe is fixedly installed at the left end of the nozzle, and the external thread pipe is matched with the internal thread.
Preferably, the observation block is embedded in the observation window groove.
Compared with the prior art, the invention has the following beneficial effects:
1. in the invention, the formation of aerosol is realized by arranging a liquid storage tank, a generating mechanism, a connecting pipe and a nozzle, and the formation efficiency and the quality of the aerosol are improved, when in use, firstly, saline liquid medicine is added into the liquid storage tank through a liquid injection port, then, a connector is connected with the output end of a compressed air device, the compressed air device generates compressed air, the compressed air enters the liquid storage tank through an air pipe and an air outlet, when the compressed air passes through the nozzle from the liquid storage tank, the compressed air forms high-speed airflow, negative pressure is formed around the nozzle to suck the liquid medicine according to Venturi effect, the liquid medicine collides with the nozzle to form fine fog particles, the fine fog particles and the air form aerosol liquid medicine particles, the pressure in the liquid storage tank is detected by arranging a pressure detection table, the volume of the compressed air in the liquid storage tank is gradually increased along with the consumption of the liquid medicine, so that the pressure in the liquid storage tank is reduced, the pressure detection meter transmits the detection value to the controller, the controller automatically starts the electric push rod, the output end of the electric push rod extends and drives the isolation plate to move, the movement of the isolation plate reduces the volume of compressed air in the liquid storage tank, the pressure in the liquid storage tank is maintained, the pressure in the liquid storage tank achieves the effect of dynamic balance, high-speed airflow sprayed by the nozzle is kept consistent, the output efficiency and quality of fog particles are effectively guaranteed, the depth of liquid medicine in the liquid storage tank is increased along with the movement of the isolation plate, the depth reduction caused by liquid medicine consumption is counteracted, the contact area between the central part of the high-speed airflow and the liquid medicine is kept relatively unchanged, the quantity of fine fog particles is guaranteed, and the use requirement of a material filtering efficiency test is met.
2. The invention realizes the pre-acceleration function of high-speed airflow by arranging the funnel-shaped groove and the spiral air passage together, the funnel-shaped groove with the left thick and the right thin is arranged, when compressed air in the liquid storage tank passes through the funnel-shaped groove, the high-speed airflow flows into a narrow space from a wide space, the cross-sectional area of the airflow column is reduced, in order to ensure that the total volume of the airflow passing through the unit time is consistent, the air pressure at the narrow space is reduced, the airflow velocity is increased, the flow velocity of the airflow is further improved by arranging the spiral air passage, pre-acceleration is provided for the airflow passing through the nozzle, the collision force of the liquid medicine and the nozzle is improved, the formation quantity of fine fog particles is improved, and the quality of the aerosol liquid medicine is improved.
3. In the invention, the forming efficiency of the aerosol liquid medicine is improved by arranging the liquid return plate and the through hole, when compressed air passes through the nozzle, high-speed airflow formed by the compressed air firstly contacts the liquid return plate and collides with the liquid return plate to form fog drops with different sizes, only smaller fog drops can pass through the through hole and collide with the nozzle again to form fine fog drops, larger fog drops cannot pass through the through hole and directly fall back into the liquid storage tank, the nozzle is prevented from colliding with the larger fog drops, and the efficiency of forming the fine fog drops at the nozzle in unit time is improved.
Drawings
FIG. 1 is a schematic diagram of the overall structure of a salt aerosol generator for filtering efficiency test according to the present invention;
FIG. 2 is a rear view of the overall structure of a salt aerosol generator for a filter efficiency test according to the present invention;
FIG. 3 is a schematic diagram of the internal structure of a salt aerosol generator for testing filtering efficiency according to the present invention;
FIG. 4 is a diagram showing the effect of the generating mechanism of the salt aerosol generator for testing filtering efficiency according to the present invention;
FIG. 5 is a schematic diagram of the overall structure of a generating mechanism of a salt aerosol generator for testing filtering efficiency according to the present invention;
FIG. 6 is a schematic diagram of the overall structure of a partition board of a salt aerosol generator for testing filtering efficiency according to the present invention;
FIG. 7 is a sectional view showing the overall structure of a housing of a salt aerosol generator for a filter efficiency test according to the present invention;
FIG. 8 is a partial schematic structural view of a salt aerosol generator for testing filtering efficiency according to the present invention.
In the figure: 1. a housing; 2. a foot pad; 3. a connecting pipe; 4. a nozzle; 5. a liquid injection port; 6. a sealing cover; 7. a pressure detection meter; 8. a mounting seat; 9. a grip; 10. a generating mechanism; 11. an operation panel; 12. an access panel; 13. an observation block; 21. mounting grooves; 22. a controller; 23. a liquid storage tank; 24. a funnel-shaped groove; 25. a helical air passage; 26. a liquid return plate; 27. a through hole; 31. an electric push rod; 32. a separator plate; 33. a slider; 34. a sleeve; 35. an air tube; 36. an air outlet head; 37. a connector; 41. a liquid inlet hole; 42. an observation window slot; 43. a chute; 44. opening a hole; 51. placing holes; 61. an internal thread; 62. an externally threaded tube.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred 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" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in figures 1-8, a salt aerosol generator for filtering efficiency test of filter materials comprises a shell 1, four corners of the lower end of the shell 1 are fixedly provided with pad feet 2, the middle part of the right end of the shell 1 is fixedly provided with a connecting pipe 3, the right end of the connecting pipe 3 is provided with a nozzle 4, the right part of the upper end of the shell 1 is fixedly provided with a liquid injection port 5, the upper end of the liquid injection port 5 is in threaded connection with a sealing cover 6, the upper part of the right end of the shell 1 is fixedly provided with a pressure detection meter 7, the input end of the pressure detection meter 7 extends into the shell 1, the middle part of the upper end of the shell 1 is fixedly provided with two bilaterally symmetrical installation seats 8, the upper ends of the two installation seats 8 are jointly and movably connected with a handle 9, the upper part of the left end of the shell 1 is provided with a generating mechanism 10, the generating mechanism 10 extends into the shell 1, the left lower part of the front end of the shell 1 is fixedly provided with an operation panel 11, the lower part of the left end of the shell 1 is connected with an overhaul board 12 through bolts, an observation block 13 is embedded in the right part of the rear end of the shell 1.
The left end of the shell 1 is provided with a mounting groove 21, the mounting groove 21 is positioned right and right of the access panel 12, a controller 22 is fixedly mounted on the lower wall of the mounting groove 21, a liquid storage tank 23 is arranged inside the shell 1, the liquid storage tank 23 is of a cylindrical structure, a funnel-shaped groove 24 is formed in the right wall of the liquid storage tank 23, a spiral air channel 25 is formed in the inner wall of the funnel-shaped groove 24, the right end of the funnel-shaped groove 24 is communicated with the connecting pipe 3, a liquid return plate 26 is fixedly mounted on the right portion of the inner wall of the funnel-shaped groove 24, a plurality of through holes 27 which are communicated left and right are formed in the left end of the liquid return plate 26, the plurality of through holes 27 are distributed in an annular array, and the partition plate 32 is convenient to move due to the design of the liquid storage tank 23 of the cylindrical structure.
The controller 22 is electrically connected with the generating mechanism 10, the pressure detecting meter 7 and the operation panel 11, the pressure detecting meter 7 and the controller 22 are both in the prior art, the pressure detecting meter 7 is used for detecting the pressure in the liquid storage tank 23, and the controller 22 is used for controlling the start, stop and expansion speed of the electric push rod 31.
Four sliding grooves 43 are formed in the inner wall of the liquid storage tank 23, the four sliding grooves 43 are distributed in an annular array, the length of each sliding groove 43 is equal to that of the liquid storage tank 23, an observation window groove 42 is formed in the rear portion of the inner wall of the liquid storage tank 23, an opening 44 is formed in the upper portion of the left wall of the liquid storage tank 23, the left end face of the opening 44 extends to the left end face of the shell 1, a liquid inlet hole 41 is formed in the upper portion of the inner wall of the liquid storage tank 23, the liquid inlet hole 41 is communicated with the liquid injection port 5, the sliding grooves 43 and the sliding blocks 33 are designed so that the partition plate 32 can only move horizontally, and liquid medicines can be placed in the liquid inlet holes 41.
The generating mechanism 10 comprises an electric push rod 31, the upper end of the electric push rod 31 is fixedly connected with the upper wall of the mounting groove 21, the output end of the electric push rod 31 penetrates through the right wall of the mounting groove 21 and is fixedly provided with a partition plate 32, the partition plate 32 is positioned in the liquid storage groove 23, four sliding blocks 33 are fixedly arranged on the outer surface of the partition plate 32, the four sliding blocks 33 are respectively connected with four sliding grooves 43 in a sliding manner, the partition plate 32 is in a left-thick-right-thin structure, the isolation plate 32 is matched with the funnel-shaped groove 24, a sleeve 34 is fixedly mounted at the upper portion of the left end of the isolation plate 32, the sleeve 34 is movably connected with the opening 44, an air pipe 35 is arranged in the sleeve 34, the right end of the air pipe 35 penetrates through the isolation plate 32 and is fixedly provided with an air outlet head 36, a connector 37 is fixedly mounted at the left end of the air pipe 35, the length of the sleeve 34 is equal to that of the liquid storage tank 23, the air pipe 35 is convenient to place due to the design of the sleeve 34, and the air pipe 35 is convenient to connect with the output end of compressed air equipment due to the arrangement of the connector 37.
A placing hole 51 is formed in the upper portion of the inclined plane of the right end of the isolation plate 32, the gas outlet head 36 is located in the placing hole 51, the outer surface of the gas outlet head 36 is fixedly connected with the inner wall of the placing hole 51, the placing hole 51 is used for placing the gas outlet head 36, and collision between the gas outlet head 36 and the funnel-shaped groove 24 is avoided.
The inner wall of the connecting pipe 3 is carved with an internal thread 61, the left end of the nozzle 4 is fixedly provided with an external thread pipe 62, the external thread pipe 62 is matched with the internal thread 61, and the nozzle 4 can be replaced.
The observation block 13 is embedded in the observation window groove 42, and the observation block 13 is made of glass material for observing the amount of the liquid medicine in the liquid storage tank 23.
When the salt aerosol generator is used, firstly, salt liquid medicine is added into the liquid storage tank 23 through the liquid injection port 5, then the connector 37 is connected with the output end of a compressed air device, the compressed air device generates compressed air, the compressed air enters the liquid storage tank 23 through the air pipe 35 and the air outlet head 36, when the compressed air passes through the nozzle 4 from the liquid storage tank 23, the compressed air forms high-speed airflow, negative pressure is formed around the nozzle 4 according to the Venturi effect to suck the liquid medicine, the liquid medicine collides with the nozzle 4 to form fine mist particles, the fine mist particles and the air form aerosol liquid medicine particles, the pressure in the liquid storage tank 23 is detected through the pressure detection table 7, along with the consumption of the liquid medicine, the volume of the compressed air in the liquid storage tank 23 is gradually increased, so that the pressure in the liquid storage tank 23 is reduced, the pressure detection table 7 transmits a detection value to the controller 22, the controller 22 automatically starts the electric push rod 31, the output end of the electric push rod 31 extends and drives the partition plate 32 to move, the movement of the partition plate 32 reduces the volume of the compressed air in the liquid storage tank 23, the pressure in the liquid storage tank 23 is maintained, the pressure in the liquid storage tank 23 achieves the effect of dynamic balance, the high-speed airflow sprayed by the nozzle 4 is kept consistent, the output efficiency and the quality of the mist particles are effectively ensured, along with the movement of the partition plate 32, the depth of the liquid medicine in the liquid storage tank 23 is increased, the depth reduction caused by the consumption of the liquid medicine is counteracted, the contact area between the central part of the high-speed airflow and the liquid medicine is kept relatively unchanged, and the quantity of fine mist particles is ensured, the using requirement of a filter efficiency test of filter materials is met, the pre-acceleration function of high-speed airflow is realized by arranging the funnel-shaped groove 24 and the spiral air passage 25 to be matched together, when compressed air in the liquid storage tank 23 passes through the funnel-shaped groove 24, the high-speed airflow flows into a narrow space from a wide space, the cross-sectional area of the airflow column is reduced, in order to ensure that the total volume of the airflow passing through the unit time is consistent, the air pressure at the narrow space is reduced, the airflow flow rate is increased, the flow rate of the airflow is further increased by arranging the spiral air passage 25, the pre-acceleration is provided for the airflow passing through the nozzle 4, the collision force between the liquid medicine and the nozzle 4 is improved, the forming quantity of fine mist particles is increased, the quality of the liquid medicine in an aerosol state is improved, the forming efficiency of the liquid medicine in the aerosol state is improved by arranging the liquid returning plate 26 and the through hole 27, when the compressed air passes through the nozzle 4, the high-speed airflow formed by the compressed air firstly contacts with the liquid return plate 26 and collides with the liquid return plate 26 to form fog drops with different sizes, only smaller fog drops can pass through the through hole 27 and collide with the nozzle 4 again to form fine fog drops, and larger fog drops cannot pass through the through hole 27 and directly fall back into the liquid storage tank 23, so that the nozzle 4 is prevented from colliding with the larger fog drops, and the efficiency of forming fine fog drops at the nozzle 4 in unit time is improved.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (8)
1. The utility model provides a consider material filtration efficiency test and use salt aerosol generator, includes shell (1), its characterized in that: the device is characterized in that pad feet (2) are fixedly mounted at four corners of the lower end of the shell (1), a connecting pipe (3) is fixedly mounted in the middle of the right end of the shell (1), a nozzle (4) is arranged at the right end of the connecting pipe (3), a liquid injection port (5) is fixedly mounted at the right end of the shell (1), a sealing cover (6) is in threaded connection with the upper end of the liquid injection port (5), a pressure detection meter (7) is fixedly mounted at the upper part of the right end of the shell (1), the input end of the pressure detection meter (7) extends into the shell (1), two bilaterally symmetrical mounting seats (8) are fixedly mounted in the middle of the upper end of the shell (1), a handle (9) is movably connected to the upper ends of the mounting seats (8) together, a generating mechanism (10) is arranged at the upper part of the left end of the shell (1), the generating mechanism (10) extends into the shell (1), and an operation panel (11) is fixedly mounted at the lower left part of the front end of the shell (1), the utility model discloses a portable electronic device, including shell (1), access panel (12) have through bolted connection shell (1) left end lower part, shell (1) rear end right part embedding has observation piece (13).
2. The saline aerosol generator for filter efficiency test according to claim 1, wherein: the utility model discloses a liquid storage device, including shell (1), mounting groove (21), liquid storage tank (23), liquid return plate (26), through-hole (27) that link up about a plurality of are opened to shell (1) left end, mounting groove (21) are located maintenance board (12) right-hand side, mounting groove (21) lower wall fixed mounting has controller (22), inside division of shell (1) has liquid storage tank (23), liquid storage tank (23) are cylindrical structure, liquid storage tank (23) right side wall is opened there is funnel shape groove (24), open funnel shape groove (24) inner wall has spiral air flue (25), funnel shape groove (24) right-hand member communicates with each other with connecting pipe (3), funnel shape groove (24) inner wall right part fixed mounting has liquid return plate (26), liquid return plate (26) left end is opened has through-hole (27) that link up about a plurality of through-hole (27) are the annular array and distribute.
3. The saline aerosol generator for filter efficiency test according to claim 2, wherein: the controller (22) is electrically connected with the generating mechanism (10), the pressure detecting meter (7) and the operation panel (11).
4. The saline aerosol generator for filter efficiency test according to claim 2, wherein: the liquid storage tank is characterized in that four sliding grooves (43) are formed in the inner wall of the liquid storage tank (23), the four sliding grooves (43) are distributed in an annular array mode, the length of each sliding groove (43) is equal to that of the liquid storage tank (23), an observation window groove (42) is formed in the rear portion of the inner wall of the liquid storage tank (23), an opening hole (44) is formed in the upper portion of the left wall of the liquid storage tank (23), the left end face of the opening hole (44) extends to the left end face of the shell (1), a liquid inlet hole (41) is formed in the upper portion of the inner wall of the liquid storage tank (23), and the liquid inlet hole (41) is communicated with the liquid injection port (5).
5. The saline aerosol generator for filter efficiency test according to claim 1, wherein: the generating mechanism (10) comprises an electric push rod (31), the upper end of the electric push rod (31) is fixedly connected with the upper wall of the mounting groove (21), the output end of the electric push rod (31) penetrates through the right wall of the mounting groove (21) and is fixedly provided with a partition plate (32), the partition plate (32) is positioned in the liquid storage groove (23), four sliding blocks (33) are fixedly arranged on the outer surface of the partition plate (32), the four sliding blocks (33) are respectively in sliding connection with four sliding grooves (43), the partition plate (32) is of a left thick-right thin structure, the partition plate (32) is matched with the funnel-shaped groove (24), a sleeve (34) is fixedly arranged on the upper portion of the left end of the partition plate (32), the sleeve (34) is movably connected with the opening (44), an air pipe (35) is arranged in the sleeve (34), the right end of the air pipe (35) penetrates through the partition plate (32) and is fixedly provided with an air outlet head (36), the left end of the air pipe (35) is fixedly provided with a connector (37), and the length of the sleeve (34) is equal to that of the liquid storage tank (23).
6. The saline aerosol generator for filter efficiency test according to claim 5, wherein: the upper part of the inclined plane at the right end of the isolation plate (32) is provided with a placing hole (51), the gas outlet head (36) is positioned in the placing hole (51), and the outer surface of the gas outlet head (36) is fixedly connected with the inner wall of the placing hole (51).
7. The saline aerosol generator for filter efficiency test according to claim 1, wherein: internal thread (61) are carved with to connecting pipe (3) inner wall, nozzle (4) left end fixed mounting has external screw thread pipe (62), external screw thread pipe (62) and internal thread (61) phase-match.
8. The saline aerosol generator for filter efficiency test according to claim 1, wherein: the observation block (13) is embedded in the observation window groove (42).
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