Novel aerosol fogging device

Abstract

The novel aerosol fogging device comprises a lower bin body and an upper cover, a conical guide convex part is arranged at the bottom in the lower bin body, an air channel penetrating through the two ends is formed in the middle of the conical guide convex part, and a conical cover is further arranged in the lower bin body. The conical cover covers the surface of the conical guide convex part, a flow channel is formed among the conical cover, the surface of the conical guide convex part and the inner wall of the lower bin body, a spraying hole is formed in the middle of the conical cover, a fogging baffle is arranged above the spraying hole, the upper cover is in threaded sealing connection with the lower bin body, and a fogging opening is further formed in the upper cover. The fogging device is simple in structure, easy to operate and assemble, good in fogging effect and convenient for subsequent detection, and accessories such as a liquid guide pipe are omitted.

Description

Technical Field

[0001] This utility model relates to the field of purification performance measurement technology, specifically to a novel aerosol mist generator. Background Technology

[0002] The purpose of an aerosol generator is to provide polydisperse solid aerosols for testing the efficiency of air filters, air purifiers, and air purifiers, as well as for standards for dust particle counters. The aerosol generating structure can use sodium chloride solution, latex ball solution, PAO, DOP, etc., to generate aerosols, thereby meeting the aerosol requirements for filter media efficiency testing, such as for air filters.

[0003] The core principle of existing aerosol generators is to disperse substances into micron or nano-sized particles through physical or chemical methods. Specifically, the two conventional atomization methods are: either placing a nozzle in a liquid and bubbling it to generate an aerosol, or using a conduit inserted into a liquid collection chamber to draw the liquid into the nozzle through a siphon effect before spraying it out. The first method has low atomization efficiency and is difficult to control the amount of atomized liquid, while the second method has a relatively complex structure, and the conduit is prone to bending and failing to draw in liquid, resulting in problems such as interrupted atomization. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to provide a novel aerosol generator with a simple structure, easy operation and assembly, eliminating the need for accessories such as liquid guide tubes, and providing good misting effect, which facilitates subsequent testing.

[0005] To solve the above-mentioned technical problems, this utility model provides a novel aerosol mist generator, including a lower chamber and an upper cover. A conical guide protrusion is provided at the bottom of the lower chamber, and an air passage is provided in the middle of the conical guide protrusion, penetrating both ends. A conical shroud is also provided in the lower chamber, which covers the surface of the conical guide protrusion and forms a flow channel between the shroud, the surface of the conical guide protrusion, and the inner wall of the lower chamber. A spray hole is provided in the middle of the conical shroud, and a misting baffle is provided above the spray hole. The upper cover is threadedly sealed to the lower chamber, and a misting port is also provided on the upper cover.

[0006] Furthermore, the two sides of the fogging baffle are connected to the conical cover as a whole through the first connector. The top inner side of the upper cover corresponding to the fogging baffle is provided with a downward positioning tube. Both ends of the top of the fogging baffle corresponding to the downward positioning tube are provided with stepped portions. The bottom of the downward positioning tube cooperates with the two stepped portions to limit the conical cover.

[0007] Furthermore, a downward positioning tube is provided on the top inner side of the upper cover, and the fogging baffle is fixedly connected to the bottom of the downward positioning tube.

[0008] Furthermore, a liquid filling hole is provided on the upper cover corresponding to the pressure positioning tube.

[0009] Furthermore, a plug is provided inside the liquid filling hole.

[0010] Furthermore, a plurality of first limiting protrusions are provided on the bottom of the lower compartment around the conical guide protrusion, and a plurality of second limiting protrusions are provided on the top surface of the conical guide protrusion. The bottom of the conical cover abuts against the first limiting protrusions, and the top of the inner side of the conical cover abuts against the second limiting protrusions.

[0011] Furthermore, a second connecting member is provided between the surface of the fogging baffle and the surface of the conical cover.

[0012] Furthermore, the diameter of the air passage at one end of the nozzle is smaller than the diameter of the nozzle, and the air passage is coaxially arranged with the nozzle.

[0013] Furthermore, a liquid level detection interface is provided on the outer wall of the lower compartment, and a transparent tube is provided on the liquid level detection interface.

[0014] Furthermore, the end of the transparent tube is arranged towards the upper cover.

[0015] The beneficial effects of this utility model are:

[0016] 1. The overall structure has only three parts, which is simple and easy to assemble. The liquid is supplied by introducing pressurized gas through the air passage and using the siphon principle. The liquid moves in the gap between the conical cover and the conical guide protrusion, eliminating the need for hoses and thus eliminating the problem of residual liquid. It is highly efficient and stable.

[0017] 2. The pressurized gas is always delivered in a directional manner. With the help of the misting baffle, it can maintain good consistency of aerosols of different particle sizes, and the misting stability is strong. It will not have an adverse effect on the overall detection system and also prevents backflow of liquid. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is an exploded structural diagram of the present invention;

[0020] Figure 3 This is a utility model Figure 1 A schematic diagram of the cross-sectional structure;

[0021] Figure 4 This is a schematic diagram of the gas flow channel structure of this utility model;

[0022] Figure 5 This is a schematic diagram of the internal structure of the lower compartment of this utility model;

[0023] Figure 6This is a schematic diagram of the structure in which the fogging baffle and the upper cover are fixedly connected in one embodiment of the present utility model;

[0024] Figure 7 This is a schematic diagram of the reinforced connection of the fogging baffle in one embodiment of the present invention;

[0025] Figure 8 This is a schematic diagram of the overall structure with detection function in one embodiment of the present invention. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments are not intended to limit the present invention.

[0027] Reference Figures 1 to 5 As shown, an embodiment of the novel aerosol generator of this utility model includes a lower chamber 1 and an upper cover 2. A conical guide protrusion 3 is provided at the bottom of the lower chamber, and an air passage 4 penetrating both ends is provided in the middle of the conical guide protrusion. A conical shroud 5 is also provided in the lower chamber. The conical shroud covers the surface of the conical guide protrusion and forms a flow channel between the surface of the conical guide protrusion and the inner wall of the lower chamber. A spray hole 6 is provided in the middle of the conical shroud, and a misting baffle 7 is provided above the spray hole. The upper cover is threadedly sealed to the lower chamber, and a misting port 8 is also provided on the upper cover.

[0028] In use, the required liquid is placed into the inner cavity of the lower chamber. Compressed clean and dry air enters through the air passage, which extends out of the lower chamber to form a pipe connected to the compressed air pipeline. The compressed air is sprayed towards the nozzle through the top of the air passage. The diameter of the top of the air passage is smaller than the diameter of the nozzle. The air passage and the nozzle are coaxially set. The compressed air is compressed and accelerated after being blocked by the small-diameter end. At the same time, a local negative pressure is generated between the end and the nozzle. The liquid in the inner cavity is drawn upward to the nozzle through the flow channel between the conical cover and the conical guide protrusion. The liquid drawn up is blown out of the nozzle along with the high-speed compressed air. At this time, the blown droplets hit the misting baffle at high speed, forming a water mist aerosol and continuing to move, and finally being sprayed out from the misting port.

[0029] Regarding the formation of the aforementioned flow channel, specifically, several first limiting protrusions 12 are provided on the bottom of the lower chamber around the conical guide protrusion, and several second limiting protrusions 13 are provided on the top surface of the conical guide protrusion. The bottom of the conical cover abuts against the first limiting protrusions, and the top of the inner side of the conical cover abuts against the second limiting protrusions. When the conical cover is placed, the first limiting protrusions support the conical cover and the bottom of the lower chamber at a certain distance, forming a gap. The second limiting protrusions also support the conical cover and the top of the conical guide protrusion at a certain distance, thereby forming a space where the whole does not contact each other and allows for liquid flow.

[0030] Since the above structure can only limit the downward direction of the conical cover, and other directions need to be limited during use, the two sides of the fogging baffle are connected to the conical cover as a whole through the first connector 111. The top inner side of the upper cover corresponding to the fogging baffle is provided with a downward positioning tube 112. Both ends of the top of the fogging baffle corresponding to the downward positioning tube are provided with step portions 10. After the upper cover is installed in place, the two radial parts of the bottom of the downward positioning tube abut against the two step portions, so that the conical cover is limited at both ends in the axial direction, and the step portions are also restricted in the radial direction, that is, a comprehensive limiting effect is formed, and the conical cover cannot move.

[0031] To improve automation, a liquid filling hole 11 is provided on the upper cover corresponding to the pressure positioning tube. A plug is installed inside the liquid filling hole, and a replenishment pipe can be fixed on the plug. The replenishment pipe is connected to a peristaltic pump. When automatic replenishment is required, the peristaltic pump supplies liquid from the replenishment pipe into the nebulizer. Of course, the replenishment speed can be adjusted by setting the peristaltic pump speed, thus eliminating the need for manual liquid addition.

[0032] Of course, it can also be done manually, but manual addition requires rotating the top cover to open, which requires both hands, and it is difficult to operate after the top cover is tightened. With a plug, you only need to remove the plug, add the liquid, and then push the plug back into the filling hole, which can also improve the convenience of operation.

[0033] In one embodiment, reference is made to Figure 6 As shown, since the fogging baffle is a sheet-like structure, it is easily bumped and deformed by the operator when disassembling the clear conical cover. Therefore, a downward positioning tube is provided on the top inner side of the upper cover to fix the fogging baffle to the bottom of the downward positioning tube, and integrate it with the downward positioning tube into one piece, without protruding outwards, thus reducing the risk of deformation.

[0034] When the misting baffle and the downward positioning tube are connected as one unit, the misting baffle is not fixedly connected to the surface of the conical hood. The position of the conical hood can be limited by abutting. Alternatively, the conical hood can be threaded to the bottom side of the lower chamber, and a through hole can be opened at the bottom of the lower chamber to allow the liquid to flow through the flow channel.

[0035] In one embodiment, reference is made to Figure 7 As shown, since the fogging baffle is a sheet structure, it is easily bumped and deformed by the operator when disassembling the clear conical cover. Therefore, a second connecting piece 14 is also provided between the surface of the fogging baffle and the surface of the conical cover to form a three-point positioning, which strengthens the strength of the fogging baffle and reduces the deformation.

[0036] In one embodiment, based on the design of the liquid filling hole, the operator can add liquid without opening the top cover. However, during this liquid filling process, the amount of liquid added cannot be observed. Therefore, this design was implemented, referring to... Figure 8As shown, a liquid level detection interface 15 is provided on the outer wall of the lower compartment, and a transparent tube 16 is provided on the liquid level detection interface. The liquid level detection interface is located below the highest liquid level. When the liquid level rises, the liquid will enter the transparent tube through the liquid level detection interface. The operator can intuitively understand the liquid level and avoid adding too much or too little liquid.

[0037] Specifically, the end of the transparent tube faces the top cover, and a stopper is installed at the end of the transparent tube. When adding liquid, the stopper is pulled out to prevent negative air pressure from affecting the liquid entering the transparent tube. After adding liquid, the stopper is put back in. The operation is convenient and reliable.

[0038] The above embodiments are merely preferred embodiments provided to fully illustrate the present utility model, and the protection scope of the present utility model is not limited thereto. Equivalent substitutions or modifications made by those skilled in the art based on the present utility model are all within the protection scope of the present utility model.

Claims

1. A novel aerosol generator, characterized in that, The device includes a lower chamber and a top cover. The bottom of the lower chamber has a conical guide protrusion, and the middle of the conical guide protrusion has an air passage that runs through both ends. The lower chamber also has a conical shroud, which covers the surface of the conical guide protrusion and forms a flow channel between the shroud, the surface of the conical guide protrusion, and the inner wall of the lower chamber. The middle of the conical shroud has a spray hole, and a misting baffle is provided above the spray hole. The top cover is threadedly sealed to the lower chamber and has a misting port.

2. The novel aerosol generator as described in claim 1, characterized in that, The two sides of the fogging baffle are connected to the conical cover as a whole through the first connector. The top inner side of the upper cover corresponding to the fogging baffle is provided with a downward positioning tube. Both ends of the top of the fogging baffle corresponding to the downward positioning tube are provided with stepped parts. The bottom of the downward positioning tube cooperates with the two stepped parts to limit the conical cover.

3. The novel aerosol generator as described in claim 1, characterized in that, A downward positioning tube is provided on the top inner side of the upper cover, and the fogging baffle is fixedly connected to the bottom of the downward positioning tube.

4. The novel aerosol generator as described in claim 2 or 3, characterized in that, The upper cover corresponding to the pressure positioning tube is provided with a liquid filling hole.

5. The novel aerosol generator as described in claim 4, characterized in that, A plug is installed inside the liquid filling hole.

6. The novel aerosol generator as described in claim 2, characterized in that, The bottom of the lower compartment around the conical guide protrusion is provided with a plurality of first limiting protrusions, and the top surface of the conical guide protrusion is provided with a plurality of second limiting protrusions. The bottom of the conical cover abuts against the first limiting protrusions, and the top of the inner side of the conical cover abuts against the second limiting protrusions.

7. The novel aerosol generator as described in claim 2, characterized in that, A second connecting member is also provided between the surface of the fogging baffle and the surface of the conical cover.

8. The novel aerosol generator as described in claim 1, characterized in that, The diameter of the air passage at one end of the nozzle is smaller than the diameter of the nozzle, and the air passage is coaxial with the nozzle.

9. The novel aerosol generator as described in claim 1, characterized in that, A liquid level detection interface is provided on the outer wall of the lower compartment, and a transparent tube is provided on the liquid level detection interface.

10. The novel aerosol generator as described in claim 9, characterized in that, The end of the transparent tube is arranged towards the top cover.

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