Suction type aerosol generating device

Abstract

The utility model discloses a suction type aerosol generating device which comprises a rectangular feeding plate, an aerosol generator is arranged above the feeding plate, and a support used for driving the feeding plate to move horizontally is arranged below the feeding plate. According to the utility model, the sample holes which are distributed in an array mode are replaced by the continuous snake-shaped grooves, and during sample injection, the sample injection port of the aerosol generator moves along the snake-shaped grooves, so that continuous sample injection can be realized, and the sample injection concentration is stable. At the last stage of sample introduction, tailings at the tail end of the snake-shaped groove can be completely sucked in, so that material waste is avoided.

Description

Technical Field

[0001] The utility model relates to an aerosol experimental device, in particular to an inhalation type aerosol generating device. Background Art

[0002] In the prior art, the sample chamber of the dry powder aerosol generating device disclosed in the utility model patent with publication number CN 203459061 U is relatively large and is not suitable for trace samples. The utility model patent with publication number CN 218250141 U discloses a trace dry powder aerosol generating device, which replaces the commonly used larger sample chamber with a dry powder sample orifice plate. The sample holes on the plate are used to accommodate dry powder. The number of sample slots to be filled is selected according to the sample volume required for the test to achieve sample quantification. At the same time, the sample orifice plate is driven horizontally through the controller setting to accurately control the dosage per unit time. This solution performs sample injection through the sample hole. When the orifice plate moves, the injection port abuts against the side wall of the hole, resulting in problems of sample injection interruption and concentration fluctuation. Utility Model Content

[0003] Purpose of the utility model: The purpose of the utility model is to provide an inhalation aerosol generating device capable of continuous sampling.

[0004] Technical solution: The inhalation aerosol generating device described in the utility model includes a rectangular feeding plate, an aerosol generator is provided above the feeding plate, and a support for driving the feeding plate to move horizontally is provided below the feeding plate.

[0005] In the utility model, the array-distributed sample holes are replaced with continuous serpentine grooves. When injecting samples, the injection port of the aerosol generator moves along the serpentine grooves, so that continuous injection can be achieved and the injection concentration can be kept stable. At the end of the injection, the tail material at the end of the serpentine groove can also be completely sucked in to avoid material waste.

[0006] Preferably, in order to facilitate the replacement of feeding plates of different specifications, the feeding plate and the support are detachably connected. More preferably, the feeding plate and the support are detachably connected via a pin, a pin hole or a thread or a bolt.

[0007] Preferably, the aerosol generator is provided with a mixing channel inside, an air inlet, a nozzle and a sample inlet outside, the two ends of the mixing channel are connected to the air inlet and the nozzle respectively, and the inner diameter of the middle part is reduced and connected to the sample inlet. The mixing channel is arranged horizontally, and the purging gas is parallel to the feeding plate. Through the Venturi structure with a reduced inner diameter in the middle part, the Bernoulli principle is used to form a negative pressure in the mixing channel, and the powder is sucked from the feeding port, which can avoid the positive pressure back-blowing of the feeding plate to blow the powder away.

[0008] Preferably, in order to achieve quantitative control of the injection process, the bottom of the support is connected to the guide device, and the guide device includes two groups of linear guide mechanisms arranged crosswise up and down, each group of linear guide mechanisms includes a slider, a screw rod that drives the slider to move, and a light rod that guides the sliding direction of the slider, and the light rods are symmetrically arranged on both sides of the screw rod.

[0009] Preferably, a base is provided at the bottom of the guide device, and the aerosol generator is fixed to one side of the base through a bracket, and the bracket is a height-adjustable bracket.

[0010] Preferably, in order to realize fully automatic sample loading, the lead screw is connected to an end drive motor.

[0011] Preferably, in order to facilitate loading, a scraper for loading is further included, and the front end scraper blade of the scraper is V-shaped.

[0012] Beneficial effects: Compared with the prior art, the utility model has the following advantages: 1. Continuous sampling, constant concentration, and reduced error; 2. Venturi structure channel to avoid positive pressure backblowing and improve operational tolerance; 3. Simplified feeding plate loading steps to improve efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 This is a schematic diagram of the internal structure of the generator of the utility model;

[0015] Figure 3 This is a schematic diagram of the scraper structure of the utility model. DETAILED DESCRIPTION

[0016] The technical solution of the utility model is further described below in conjunction with the accompanying drawings.

[0017] like Figure 1 As shown, it is a schematic diagram of the overall structure of the utility model. The inhalation type micro dry powder aerosol generating device is mainly composed of an aerosol generator 6, a feeding mechanism and a guiding device.

[0018] like Figure 1 As shown, the feeding mechanism includes a feeding plate 42, and a continuous serpentine groove 43 is formed on the upper surface of the feeding plate 42. The serpentine groove 43 is used to accommodate the drug to be tested to achieve continuous sampling. The drug can be in the form of dry powder or liquid with low fluidity. The feeding plate 42 is a rectangular plate made of stainless steel. The external dimensions of the feeding plate are fixed to facilitate connection and fixation with the guide mechanism. The length, spacing and depth of the internal serpentine groove 43 can be adjusted so that the feeding plate 42 has different capacities.

[0019] An aerosol generator 6 is arranged above the feeding mechanism. Figure 2 As shown, a horizontal mixing channel is provided inside the aerosol generator 6, a sample inlet 61 is provided at the bottom, an air inlet 62 and a nozzle 63 are provided at both ends, and the two ends of the mixing channel are connected to the air inlet 62 and the nozzle 63 respectively, and the inner diameter of the middle part of the mixing channel is reduced and connected to the sample inlet 61 to form a Venturi structure. The air inlet 62 is connected to an air pump (not shown); when the gas passes through the Venturi structure of the mixing channel, a negative pressure is formed due to the Bernoulli principle, so that the dry powder sample is sucked into the mixing channel, and the gas and the dry powder are mixed. The mixing channel is arranged horizontally, and the purged gas is parallel to the feeding plate, which can avoid the situation where the positive pressure blows back the feeding plate and blows the powder away, thereby improving the experimental fault tolerance rate.

[0020] A guide device is provided below the feeding mechanism. The guide device is mainly composed of two sets of linear guide devices stacked up and down and perpendicular to each other. Each set of linear guide devices includes a slider, a screw rod driving the slider to slide, and a light rod guiding the slider to slide linearly. The light rods are symmetrically arranged on both sides of the screw rod to ensure the stability of the linear drive device. The upper linear drive device 3 is fixedly mounted on the slider of the lower linear drive device 2, and the end of the screw rod is connected to the drive motor to realize automatic loading. The feeding plate 42 is connected to the slider of the upper linear drive device 3 through the support 41. The feeding plate 42 and the support 41 are detachably connected and can be plugged in through a pin shaft and a pin hole, or can be connected through a thread or a screw hole.

[0021] A base 1 is provided below the guide mechanism, and the aerosol generator 6 is fixed on the base 1 through a bracket 5. The bracket 5 is a liftable bracket to adjust the relative height of the aerosol generator 6 and the feeding plate 42 so that the injection port 61 abuts against the serpentine groove 43.

[0022] like Figure 3 As shown, the inhalation aerosol generating device also includes a scraper 7, and a V-shaped scraper blade 71 is provided at the end of the scraper 7. When loading the sample, the bottom side of the scraper blade is pressed against the surface of the feeding plate 42, and the dry powder is added to the inner side of the scraper blade. The scraper blade 71 is moved so that its opening slides along the extension direction of the serpentine groove 43, and the dry powder sample can be continuously scraped into the serpentine groove, thereby realizing rapid sample loading.

Claims

1. An inhalation aerosol generating device, characterized in that: It comprises a rectangular feeding plate (42), the surface of which is provided with continuous serpentine grooves (43), an aerosol generator (6) is provided above the feeding plate, and a support (41) for driving the feeding plate to move horizontally is provided below the feeding plate.

2. The inhalation aerosol generating device according to claim 1, characterized in that: The feeding plate (42) and the support (41) are detachably connected.

3. The inhalation aerosol generating device according to claim 2, characterized in that: The feeding plate (42) and the support (41) are detachably connected via a pin shaft, a pin hole or a bolt, a screw hole.

4. The inhalation aerosol generating device according to claim 1, characterized in that: The aerosol generator (6) is provided with a mixing channel inside and an air inlet (62), a nozzle (63) and a sample inlet (61) outside. The two ends of the mixing channel are respectively connected to the air inlet (62) and the nozzle (63), and the middle part has a reduced inner diameter and is connected to the sample inlet (61).

5. The inhalation aerosol generating device according to claim 1, characterized in that: The bottom of the support (41) is connected to a guide device, which includes two groups of linear guide mechanisms arranged crosswise up and down, each group of linear guide mechanisms includes a slider, a screw rod driving the slider to move, and a light rod guiding the sliding direction of the slider, and the light rods are symmetrically arranged on both sides of the screw rod.

6. The inhalation aerosol generating device according to claim 5, characterized in that: It also comprises a base (1) arranged below the guide device, the aerosol generator (6) is fixed to one side of the base (1) via a bracket (5), and the bracket (5) is a height-adjustable bracket.

7. The inhalation aerosol generating device according to claim 5, characterized in that: The lead screw is connected to an end driving motor.

8. The inhalation aerosol generating device according to claim 1, characterized in that: It also comprises a scraper (7) for feeding, wherein the front end scraper (71) of the scraper is V-shaped.

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