Novel aerosol dilution system

Abstract

The utility model relates to the technical field of high-concentration dust particle or high-concentration oil mist detection, and particularly discloses a novel aerosol dilution system which comprises a front-end filter, a uniform mixing cylinder, a guide cylinder, a rear-end filter and a fan which are sequentially connected and arranged in the gas flowing direction, a first silencer is installed on an air inlet of the front-end filter, and a second silencer is installed on an air outlet of the rear-end filter. An aerosol inlet is formed in the position, close to the front-end filter, of the uniform mixing cylinder, a sampling opening is formed in the position, close to the guide cylinder, of the uniform mixing cylinder, a detachable diffusion plate is installed in the uniform mixing cylinder and is closer to the front-end filter than the aerosol inlet, and a second silencer is installed on an exhaust port of the fan; according to the aerosol dilution system, the silencers are arranged at the gas inlet end and the gas outlet end respectively, noise can be reduced, gas entering the uniform mixing cylinder and aerosol left after detection can be filtered by arranging two filters, the cleanliness of the whole dilution process is guaranteed, and the dilution efficiency is improved. The detection requirements of detection instruments such as a photometer and a counter on the aerosol are met.

Description

Technical Field

[0001] This application relates to the technical field of detecting high concentrations of dust particles or high concentrations of oil mist, and in particular to a novel aerosol dilution system. Background Technology

[0002] Aerosol dilution equipment is an auxiliary testing device used for HEPA filters and leak testing after their installation. Currently, as pharmaceutical and medical institutions increasingly demand higher cleanliness standards for production areas and equipment, there is a widespread requirement to conduct leak tests on HEPA filters and the filter terminals of purification products to verify whether the relevant areas and equipment meet the cleanliness requirements.

[0003] However, existing aerosol dilution equipment still has the following shortcomings in use:

[0004] First, only a filter is installed at the air inlet to filter the air entering the mixing cylinder, but it cannot filter the remaining aerosol to be discharged, and cannot guarantee the cleanliness of the entire dilution process.

[0005] Secondly, the equipment generates a lot of noise during operation, increasing the auditory stress on staff.

[0006] To address the aforementioned problems, this application discloses a novel aerosol dilution system. Utility Model Content

[0007] To overcome the shortcomings of the prior art, this application discloses a novel aerosol dilution system.

[0008] To achieve the above objectives, the technical solution adopted in this application is: a novel aerosol dilution system, comprising a front-end filter, a mixing cylinder, a guide cylinder, a rear-end filter, and a fan arranged sequentially along the gas flow direction. A first silencer is installed on the air inlet of the front-end filter. The mixing cylinder has an aerosol mist inlet near the front-end filter and a sampling port near the guide cylinder. A detachable diffuser is installed inside the mixing cylinder closer to the front-end filter than the aerosol mist inlet. A second silencer is installed on the exhaust port of the fan.

[0009] In one specific embodiment of this application, the mixing cylinder and the guide cylinder are connected by a bend joint arranged at 90°.

[0010] As one specific embodiment of this application, a wind speed sensor for detecting wind speed is installed on the exhaust port of the front-end filter.

[0011] As a specific embodiment of this application, the front-end filter includes a filter box and a filter block. The filter block is installed inside the filter box and has several small filter holes inside. The filter box has an opening. The filter box is hinged to a cover for closing or opening the opening. Air ducts are installed on the cover and on one side wall of the filter box opposite to the cover. The filter box has at least two rotating pressure blocks on the side opposite to the hinge for fixing the cover from the side.

[0012] More preferably, the back-end filter and the front-end filter have the same structure.

[0013] As one specific embodiment of this application, the first muffler includes a straight cylinder and a spiral column, the spiral column being interference-fitted inside the straight cylinder, and the two axial ends of the straight cylinder being interference-fitted with cross-shaped joints respectively.

[0014] More preferably, the second muffler has the same structure as the first muffler.

[0015] As a specific embodiment of this application, the interior of the mixing cylinder is provided with a step closer to the front-end filter than the aerosol inlet, and the diffuser plate has several diffuser holes arranged in a honeycomb pattern inside, and the diffuser plate can be detachably installed on the step.

[0016] More preferably, the inner circumference of the step is provided with a plurality of L-shaped grooves, and the bottom of the diffuser is provided with a plurality of L-shaped protrusions corresponding to the L-shaped grooves. When the diffuser is installed on the step, the plurality of L-shaped protrusions at the bottom of the diffuser are twisted into the interior of the plurality of L-shaped grooves.

[0017] More preferably, at least one knob is provided above the diffuser to drive the diffuser to rotate.

[0018] This application achieves the following beneficial effects:

[0019] 1. The aerosol dilution system designed in this application can generate lower noise during the operation of the entire equipment by setting a first silencer and a second silencer at the air inlet end of the front-end filter and the air outlet end of the fan, respectively, thereby reducing the auditory stress on the staff.

[0020] 2. This application, by setting up front-end and back-end filters, can filter the gas entering the mixing cylinder and the remaining aerosols, ensuring the cleanliness of the entire dilution process and meeting the aerosol detection requirements of photometers, counters and other detection instruments.

[0021] 3. By detachably fixing the diffuser plate inside the mixing cylinder, this application not only ensures stable diversion of the gas entering the mixing cylinder, but also facilitates subsequent cleaning and maintenance, thus having high practicality.

[0022] Other features and advantages of this application will be set forth in the following description and will be apparent in part from the description, or may be learned by practicing the application. The objectives and other advantages of this application can be realized and obtained through the structures shown in the description and drawings. Attached Figure Description

[0023] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the disclosure of this application and, together with the specification, serve to explain the principles of this disclosure.

[0024] Figure 1 This is a schematic diagram of the overall structure disclosed in this application;

[0025] Figure 2 This is a schematic diagram of the cross-sectional structure of the front-end filter or back-end filter disclosed in this application;

[0026] Figure 3 This is a schematic diagram of the cross-sectional structure of the first or second muffler disclosed in this application;

[0027] Figure 4 This is a schematic diagram of the diffuser installation cross-section structure disclosed in this application. Detailed Implementation

[0028] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0029] In the description of this application, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "around", etc., which indicate orientation or positional relationship, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the component or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0030] Example

[0031] To address the issues of existing aerosol dilution equipment failing to guarantee cleanliness and generating significant noise during operation, this paper refers to... Figure 1 and Figure 4As shown, this application discloses a novel aerosol dilution system, which includes a front-end filter 10, a mixing cylinder 20, a guide cylinder 30, a rear-end filter 40 and a fan 50 arranged sequentially along the gas flow direction.

[0032] In one design, the mixing cylinder 20 and the guide cylinder 30 are connected by a bend joint 80 arranged at 90°. When the blower 50 generates negative pressure during operation, the external gas passes sequentially through the front filter 10, mixing cylinder 20, bend joint 80, guide cylinder 30, and rear filter 40 before being discharged by the blower 50. In addition, a wind speed sensor 90 is installed on the exhaust port of the front filter 10 to detect the wind speed after filtration by the front filter 10.

[0033] A first silencer 60 is installed on the air inlet of the front-end filter 10 for intake noise reduction. An aerosol mist inlet 21 is provided near the front-end filter 10, and a sampling port 22 is provided near the guide tube 30. The aerosol mist inlet 21 is used to input the aerosol into the interior of the mixing cylinder 20 after atomization, and the sampling port 22 is used to output and detect the diluted aerosol. A detachable diffuser 23 is installed inside the mixing cylinder 20 closer to the front-end filter 10 than the aerosol mist inlet 21 to prevent the airflow from generating eddies when passing through the bend joint 80. A second silencer 70 is installed on the exhaust port of the fan 50 for exhaust noise reduction.

[0034] In the specific design: the position from the aerosol misting port to the diffuser plate 23 is set as d1, the inner diameter of the mixing cylinder 20 is D, the position from the aerosol misting port 21 to the sampling port 22 is d2, the flow velocity inside the mixing cylinder 20 is V, the cross-sectional area of ​​the mixing cylinder 20 is S, and the air volume inside the mixing cylinder 20 is Q, resulting in the following relationship:

[0035] d1 = 0.5D, d2 = 5D;

[0036] Q = S * V, S = πD² / 4;

[0037] Where V is obtained from the wind speed sensor 90, and S is calculated.

[0038] The novel aerosol dilution system of this application will be described in detail below with reference to the above structure and related descriptions: In specific implementation, the blower 50 is first controlled to run. At this time, the external gas first enters the front-end filter 10 through the first silencer 60 for filtration, and then enters the mixing cylinder 20 after being steadily diverted by the diffuser 23. At the same time, the aerosol is atomized through the aerosol atomization port and enters the mixing cylinder 20 to mix and dilute with the gas entering the mixing cylinder 20. When the diluted aerosol reaches the sampling port 22, the staff can sample the mixed and diluted aerosol and detect the aerosol through a photometer, counter and other detection instruments. The remaining aerosol will be guided through the bend joint 80 to the guide tube 30 and then enter the rear-end filter 40 for filtration. Finally, the remaining hot melt adhesive after filtration goes to the exhaust port of the blower 50 and is discharged through the second silencer 70.

[0039] refer to Figure 1 and 2 As shown, the front-end filter 10 of this application includes filter boxes 11 and 41 and filter blocks 12 and 42. Filter blocks 12 and 42 are installed inside the filter boxes 11 and 41. The filter blocks 12 and 42 have a plurality of filter holes 121 and 421 inside. The filter box 11 has an opening (not shown). The filter box 11 and 41 are hinged to a cover 14 and 44 for closing or opening the opening via hinges 13 and 43. The cover 14 and 44 and the filter box 11 and 41 are directly opposite to the cover 14 and 44. Air ducts 16 and 46 are respectively installed on one side wall of the filter box 11 and 41. The filter box 11 and 41 have at least two rotating pressure blocks 15 and 45 on the side opposite to the hinges 13 and 43 for fixing the cover 14 and 44 from the side.

[0040] When the front-end filter 10 is installed, the air ducts 16 and 46 on the cover 14 and 44 are connected to the first silencer 60, and the air ducts 16 and 46 on one side wall of the filter box 11 and 41 are connected to the mixing cylinder 20.

[0041] After the external gas passes through the first silencer 60 and the air ducts 16 and 46 on the box cover 14 and 44 into the filter box 11 and 41, the filter blocks 12 and 42 will filter the gas, and the filtered gas will enter the air ducts 16 and 76 on one side wall of the filter box 11 and 41 through the filter holes 121 and 421 to the mixing cylinder 20.

[0042] During subsequent maintenance and cleaning, the operator can rotate the rotating pressure block 15, 45 to open the box cover 14, 44. At this time, the filter block 12, 42 can be taken out for cleaning (the maintenance and cleaning principle of the back-end filter 40 is the same, and will not be described in detail later).

[0043] refer to Figure 1 and 2As shown, the back-end filter 40 and the front-end filter 10 of this application have the same structure;

[0044] When the back-end filter 40 is installed, the air ducts 16 and 46 on the cover 14, 44 are connected to the air inlet of the fan 50, and the air ducts 16 and 46 on one side wall of the filter box 11 are connected to the guide tube 30.

[0045] After the remaining aerosol enters the filter box 11, 41 through the air duct 16, 46 on one side wall of the filter box 11, the filter blocks 12, 42 will filter the gas, and the filtered aerosol will enter the air duct 16, 46 on the box cover 14, 44 through the filter holes 121, 421 to the air inlet of the fan 50.

[0046] refer to Figure 4 As shown, the first silencer 60 of this application includes straight cylinders 61 and 71 and spiral columns 62 and 72. The spiral columns 62 and 72 are interference-fitted inside the straight cylinders 61 and 71. Cross-shaped connectors 63 and 73 are respectively interference-fitted at both ends of the straight cylinders 61 and 71. The purpose of setting the cross-shaped connectors 63 and 73 is to prevent the spiral columns 62 and 72 from detaching from the straight cylinders 61 and 71. One of the cross-shaped connectors 63 and 73 of the first silencer 60 is connected to the air inlet of the front-end filter 10. In actual use, the gas will enter along the spiral grooves of the spiral columns 62 and 72, thus achieving air intake silencer.

[0047] refer to Figure 1 and Figure 3 As shown, the second silencer 70 of this application has the same structure as the first silencer 60. The purpose of setting the cross-shaped connectors 63 and 73 is also to prevent the spiral columns 62 and 72 from detaching from the straight cylinders 61 and 71. One of the cross-shaped connectors 63 and 73 of the second silencer 70 is connected to the exhaust port of the fan 50. In actual use, the aerosol will be discharged along the spiral grooves (not shown) of the spiral columns 62 and 72, thus achieving exhaust noise reduction.

[0048] Continue to refer to Figure 1 and Figure 3 As shown, the interior of the mixing cylinder 20 of this application is closer to the front filter 10 than the aerosol inlet 21 and is integrally provided with a step 24. The diffuser plate 23 has several diffuser holes 232 arranged in a honeycomb pattern inside, and the diffuser plate 23 can be detachably installed on the step 24.

[0049] In a detachable installation method, this application provides several L-shaped grooves 241 on the inner circumference of the step 24, and several L-shaped protrusions 231 corresponding to the L-shaped grooves 241 are provided at the bottom of the diffuser 23. When the diffuser 23 is installed on the step 24, several L-shaped protrusions 231 at the bottom of the diffuser 23 are twisted into the interior of several L-shaped grooves 241. In order to facilitate the operator to easily rotate the diffuser 23, this application provides at least one knob 233 above the diffuser 23 for driving the diffuser 23 to rotate. In specific operation, the operator can push the knob to make the diffuser 23 rotate.

[0050] In the description of this specification, the references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0051] The above embodiments are only for illustrating the technical concept and features of this application, and are intended to enable those skilled in the art to understand the content of this application and implement it accordingly. They should not be used to limit the scope of protection of this application. All equivalent changes or modifications made in accordance with the spirit and essence of this application should be included within the scope of protection of this application.

Claims

1. A novel aerosol dilution system, characterized in that, The device includes a front-end filter, a mixing cylinder, a guide cylinder, a rear-end filter, and a fan arranged sequentially along the gas flow direction. A first silencer is installed on the air inlet of the front-end filter. The mixing cylinder has an aerosol mist inlet near the front-end filter and a sampling port near the guide cylinder. A detachable diffuser is installed inside the mixing cylinder closer to the front-end filter than the aerosol mist inlet. A second silencer is installed on the exhaust port of the fan.

2. The novel aerosol dilution system according to claim 1, characterized in that, The mixing cylinder and the guide cylinder are connected by a bend joint arranged at 90°.

3. The novel aerosol dilution system according to claim 1, characterized in that, A wind speed sensor for detecting wind speed is installed on the exhaust port of the front-end filter.

4. The novel aerosol dilution system according to claim 1, characterized in that, The front-end filter includes a filter box and a filter block. The filter block is installed inside the filter box and has several small filter holes inside. The filter box has an opening. The filter box is hinged to a cover for closing or opening the opening. Air ducts are installed on the cover and on one side wall of the filter box opposite to the cover. The filter box has at least two rotating pressure blocks on the side opposite to the hinge for fixing the cover from the side.

5. A novel aerosol dilution system according to claim 4, characterized in that, The back-end filter and the front-end filter have the same structure.

6. The novel aerosol dilution system according to claim 1, characterized in that, The first muffler includes a straight cylinder and a spiral column. The spiral column is interference-fitted inside the straight cylinder, and the two axial ends of the straight cylinder are respectively interference-fitted with cross-shaped joints.

7. A novel aerosol dilution system according to claim 6, characterized in that, The second muffler has the same structure as the first muffler.

8. The novel aerosol dilution system according to claim 1, characterized in that, The mixing cylinder has a step closer to the front filter than the aerosol inlet. The diffuser plate has several diffuser holes arranged in a honeycomb pattern inside, and the diffuser plate can be detachably installed on the step.

9. A novel aerosol dilution system according to claim 8, characterized in that, The inner circumference of the step is provided with several L-shaped grooves, and the bottom of the diffuser is provided with several L-shaped protrusions corresponding to the L-shaped grooves. When the diffuser is installed on the step, the several L-shaped protrusions at the bottom of the diffuser are twisted into the interior of the several L-shaped grooves.

10. A novel aerosol dilution system according to claim 9, characterized in that, At least one knob is provided above the diffuser to drive the diffuser to rotate.

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