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CN-224221311-U - Dry powder aerosol generator

CN224221311UCN 224221311 UCN224221311 UCN 224221311UCN-224221311-U

Abstract

The utility model provides a dry powder aerosol generator, wherein a sample tray is arranged at the top of a driving part shell, a driving component is arranged in the driving part shell and can drive the sample tray to rotate, a sample tray dust cover is arranged at the top of the driving part shell, the aerosol generating component is in contact with the sample tray and can absorb dry powder on the sample tray, the aerosol generating component comprises a venturi tube and a powder suction pipeline which are connected, an air inlet compression area, a venturi negative pressure area and an aerosol outlet which are sequentially communicated are formed in the venturi tube, a powder suction channel is formed in the powder suction pipeline, one end of the powder suction channel is communicated with a sample groove on the sample tray through the powder suction opening, and the other end of the powder suction channel is communicated with the venturi negative pressure area. The utility model adopts venturi effect, when fluid passes through the gradually contracted pipeline, the speed of the fluid increases and the pressure of the fluid decreases, and dry powder particles can be effectively sucked and converted into aerosol form to be sprayed out through the pressure difference formed in the pipeline.

Inventors

  • ZHU KAI

Assignees

  • 上海塔望智能科技有限公司

Dates

Publication Date
20260512
Application Date
20250530

Claims (10)

  1. 1. A dry powder aerosol generator, characterized by comprising the following steps: A drive section housing (1); A sample tray (2) provided on top of the drive section housing (1); a driving assembly (3) which is arranged in the driving part shell (1) and can drive the sample tray (2) to rotate; The sample disc dust cover (4) is arranged at the top of the driving part shell (1) and covers the upper part of the sample disc (2); An aerosol generating assembly in contact with the sample tray (2) capable of absorbing dry powder on the sample tray (2) to form an aerosol; Wherein the aerosol generating assembly comprises a venturi tube (5) and a powder suction pipeline (6) which are connected; An air inlet (7), an air inlet compression area (8), a venturi negative pressure area (9) and an aerosol outlet (10) which are sequentially communicated are formed in the venturi tube (5), and a powder suction channel (11) is formed in the powder suction pipeline (6); one end of the powder suction channel (11) is communicated with a sample groove (12) on the sample tray (2) through a powder suction port, and the other end of the powder suction channel (11) is communicated with the Venturi negative pressure area (9).
  2. 2. Dry powder aerosol generator according to claim 1, characterized in that the dust cap is detachably mounted on the drive part housing (1) by means of a first fixing bolt (13).
  3. 3. Dry powder aerosol generator according to claim 1, characterized in that the drive assembly (3) is connected to the sample tray (2) by a sample tray drive shaft (14).
  4. 4. Dry powder aerosol generator according to claim 1, characterized in that the sample tray (2) is a circular tray and the sample groove (12) is an annular groove provided along an edge of the circular tray.
  5. 5. Dry powder aerosol generator according to claim 1, characterized in that the sample tray dust cover (4) is of transparent construction.
  6. 6. Dry powder aerosol generator according to claim 1, characterized in that the venturi tube (5) and the suction line (6) are detachably connected by means of a second fixing bolt (15).
  7. 7. A dry powder aerosol generator according to claim 1, characterized in that the drive assembly (3) is a drive motor.
  8. 8. Dry powder aerosol generator according to claim 1, characterized in that the drive part housing (1) and the sample tray dust cap (4) are both cuboid.
  9. 9. Dry powder aerosol generator according to claim 1, characterized in that the aerosol outlet (10) is connected to an exposure cabin for discharging the formed aerosol into the exposure cabin.
  10. 10. The dry powder aerosol generator of claim 1, further comprising a powder compactor mounted over the sample well (12) for distributing the sample evenly within the sample well (12) during powder addition.

Description

Dry powder aerosol generator Technical Field The utility model relates to the technical field of experimental animal instruments, in particular to a dry powder aerosol generator, especially a trace dry powder aerosol generator, and especially a device capable of uniformly generating milligram-grade dry powder substances. Background Conventional aerosol generators are typically designed for larger amounts of powder samples and are not suitable for researchers who use rare, expensive or sensitive materials in very small amounts (e.g., milligram scale). Thus, there is a clear need for techniques that can efficiently utilize small amounts of sample without waste. It is not easy to generate a stable and uniformly distributed aerosol from very little dry powder, since small amounts of sample are susceptible to environmental factors such as static electricity, humidity changes, etc., resulting in uneven dispersion or loss. In addition, it is also important to ensure that these microsamples retain their original properties during the conversion process. The existing aerosol generating methods are either unsuitable for handling such trace amounts of samples or do not guarantee the integrity and stability of the samples throughout the process. The patent document with the publication number of CN218654390U discloses a simple dry powder aerosol generator which comprises a tank body, a tank body cover, an air inlet pipe and a sheet metal net-shaped turbulence piece, wherein the bottom of the tank body is used for placing dry powder particles, the tank body and the tank body cover are connected in a sealing manner to enclose a reaction chamber, an outlet for outputting the dry powder aerosol is arranged on the tank body cover, the air inlet pipe penetrates through the tank body cover and extends downwards to the reaction chamber, a plurality of gas nozzles are arranged at the tail end of the air inlet pipe at equal height, the gas nozzles are used for vertically spraying gas downwards, and the metal net-shaped turbulence piece is fixed on the air inlet pipe and is positioned above the gas nozzles. However, the patent document still has the disadvantage that the integrity and stability of the sample throughout the process cannot be ensured. Disclosure of utility model In view of the shortcomings in the prior art, it is an object of the present utility model to provide a dry powder aerosol generator. According to the present utility model there is provided a dry powder aerosol generator comprising: a driving part housing; A sample tray provided on the top of the driving part housing; the driving assembly is arranged in the driving part shell and can drive the sample disc to rotate; The sample disc dust cover is arranged at the top of the driving part shell and covers the upper part of the sample disc; The aerosol generating assembly is contacted with the sample tray and can absorb dry powder on the sample tray to form aerosol; wherein, the aerosol generating component comprises a venturi tube and a powder suction pipeline which are connected; An air inlet, an air inlet compression area, a venturi negative pressure area and an aerosol outlet which are sequentially communicated are formed in the venturi tube; One end of the powder suction channel is communicated with a sample groove on the sample disc through a powder suction port, and the other end of the powder suction channel is communicated with the Venturi negative pressure area. Preferably, the dust cover is detachably mounted on the driving part housing by a first fixing bolt. Preferably, the drive assembly is coupled to the sample tray via a sample tray drive shaft. Preferably, the sample tray is a circular tray, and the sample groove is an annular groove arranged along the edge of the circular tray. Preferably, the sample tray dust cover is of a transparent structure. Preferably, the venturi tube and the powder suction pipeline are detachably connected through a second fixing bolt. Preferably, the driving assembly is a driving motor. Preferably, the drive part housing and the sample tray dust cover are both rectangular. Preferably, the aerosol outlet is connected to an exposure chamber for discharging the aerosol formed into the exposure chamber. Preferably, the device further comprises a powder pressing device, wherein the powder pressing device is arranged above the sample groove and is used for uniformly distributing samples in the sample groove when powder is added. Compared with the prior art, the utility model has the following beneficial effects: 1. The utility model adopts the Venturi effect, a Venturi negative pressure area is formed in the Venturi tube, when fluid passes through the gradually contracted pipeline, the speed of the fluid is increased, the pressure is reduced, and dry powder particles can be effectively sucked and converted into aerosol form to be sprayed through the pressure difference of the travel in the pipeline. 2. The utility model com