Centrifugal fan
By installing a sintered plate with mesh and scraper on the inner wall of the centrifugal fan casing, combined with airflow and scraping design, the problem of vegetables sticking to the wall during the crushing process of unheated vegetables is solved, the full utilization of raw materials and normal operation of the impeller are achieved, and the processing cost is reduced.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGSU HENGZERUI INTELLIGENT TECHNOLOGY CO LTD
- Filing Date
- 2025-05-14
- Publication Date
- 2026-04-14
AI Technical Summary
In traditional vegetable powder processing, unheated vegetables often stick to the walls of the centrifugal fan, leading to raw material waste and abnormal operation of the impeller.
A sintered plate with a mesh is installed on the inner wall of the volute, and compressed air is used to provide airflow to blow off the sticky material. At the same time, the scraper on the back of the impeller scrapes off the hard-to-reach areas. Combined with the multi-layer mesh plate design and the outlet drainage system, the material is discharged smoothly.
This effectively solved the problem of material sticking to the inner wall of the volute, improved the utilization rate of raw materials and the normal operation of the impeller, and reduced processing costs.
Smart Images
Figure CN224120426U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of grinding technology, specifically to a centrifugal fan. Background Technology
[0002] The advantages of processing fresh vegetables into vegetable powder are: low moisture content, which extends shelf life and reduces storage, transportation, and packaging costs. Vegetable powder can be applied to almost all areas of food processing, improving the nutritional content, color, and flavor of food, and can replace the use of artificial colorings, thus protecting the health of consumers.
[0003] Traditional vegetable powder processing methods involve first drying the vegetables with heat before pulverizing them. This process is energy-intensive and results in high costs. To reduce costs, some companies have developed systems that directly pulverize vegetables without prior drying. These systems feed vegetables into a centrifugal fan, where internal impellers chop them. After multiple pulverizations and circulation, the desired powder is obtained. However, because there is no pre-drying process, the moisture-containing vegetables easily stick to the inner wall of the fan, leading to material waste. Furthermore, excessive sticking can interfere with the normal operation of the impeller. Summary of the Invention
[0004] To address the aforementioned technical problems, this utility model provides a centrifugal fan that can effectively solve the problem of material sticking to the inner wall of the volute and improve the utilization rate of raw materials.
[0005] The technical solution is as follows: a centrifugal fan includes a volute and an impeller disposed within the volute. The feed inlet of the volute is located on the front sidewall of the volute. The volute is characterized by having arc-shaped strip-shaped notches on its front and back sidewalls. A sintered plate with mesh is installed within the arc-shaped strip-shaped notches. An arc-shaped cavity is disposed on the outer side of the sintered plate. The arc-shaped cavity is connected to a compressed air source. A scraper is disposed on the back of the impeller.
[0006] A further feature is that a water outlet is provided at the lowest point of the arc-shaped cavity, and the water outlet is connected to a water outlet pipe;
[0007] The compressed air source is an air bag, and the outer wall of the arc-shaped cavity is provided with an air bag support;
[0008] The sintered plate is formed by sintering multiple layers of perforated plates, and the inner mesh diameter of the sintered plate is smaller than the outer mesh diameter.
[0009] By adopting this utility model, the sintered plate installed on the volute is used to blow off the material adhering to the inner wall of the opposite side using compressed air and airflow. At the same time, the scraper on the back of the impeller can scrape the material in areas that cannot be reached by the air blowing hole when the impeller rotates, ensuring that there is no material adhering to the inner wall and allowing the raw materials to be fully utilized. Attached Figure Description
[0010] Figure 1 This is the front view of the present utility model;
[0011] Figure 2 This is a side view of the present invention;
[0012] Figure 3 This is a schematic diagram of the air intake structure. Detailed Implementation
[0013] See Figures 1-3 As shown, a centrifugal fan includes a volute 1 and an impeller 2 disposed within the volute 1. The feed inlet 12 of the volute 1 is located on the front side wall of the volute 1, and the discharge outlet 3 is located on the upper side of the volute 1. A motor 4 connected to the impeller 2 is disposed on the back of the volute 1. Arc-shaped strip-shaped notches are provided on the front and back side walls of the volute 1. A sintered plate 5 with mesh is installed in the arc-shaped strip-shaped notches. An arc-shaped cavity 6 is disposed on the outside of the sintered plate 5. The arc-shaped cavity 6 is connected to a compressed air source 7, which is an air manifold. An air manifold support 8 is disposed on the outer wall of the arc-shaped cavity 6. A water outlet is disposed at the lowest point of the arc-shaped cavity 6, and the water outlet is connected to a water outlet pipe 10.
[0014] For areas on the inner wall of the volute 1 that are covered by the impeller 2 and cannot be swept, the scraper 9 on the back of the impeller 2 is used to scrape off the material adhering to the wall, so that it can be smoothly discharged into the subsequent process.
[0015] Since the material was not dried before entering, water will be generated during crushing. This water will settle at the bottom of the volute 1. In order to prevent excess water from affecting normal powder making, a sintering plate 5 is designed. The sintering plate 5 is made of multiple layers of perforated plate. The inner mesh of the sintering plate 5 is smaller than the outer mesh, ensuring that the water generated during crushing can be discharged from the inside to the outside, and the slag will not pass through the sintering plate 5. The water outlet is located at the lowest point, and a control valve 11 is installed on the water outlet pipe 10. When too much water accumulates in the arc-shaped cavity 6, the control valve 11 is opened to allow the water to drain.
[0016] Vegetables enter the volute 1 through the feed inlet 12, are chopped by the high-speed rotating impeller 2, and are discharged from the outlet 3 under the action of centrifugal force driven by the airflow, thus improving the drying effect 6.
Claims
1. A centrifugal fan, comprising a volute and an impeller disposed within the volute, wherein the feed inlet of the volute is located on the front side wall of the volute, characterized in that, The front and back sidewalls of the volute are provided with arc-shaped strip-shaped notches, and a sintered plate with mesh is installed in the arc-shaped strip-shaped notches. An arc-shaped cavity is provided on the outside of the sintered plate, and the arc-shaped cavity is connected to a compressed air source. A scraper is provided on the back of the impeller.
2. A centrifugal fan according to claim 1, characterized in that, A water outlet is provided at the lowest point of the arc-shaped cavity, and the water outlet is connected to a water outlet pipe.
3. A centrifugal fan according to claim 1, characterized in that, The compressed air source is an air bag, and the outer wall of the arc-shaped cavity is provided with an air bag support.
4. A centrifugal fan according to claim 1, characterized in that, The sintered plate is formed by sintering multiple layers of perforated plates, and the inner mesh diameter of the sintered plate is smaller than the outer mesh diameter.