挥发性粒子去除装置
By directly measuring the flow rates of the sample gas and dilution gas, and combining a Venturi gas flow meter and an ejector mixer, the problems of low accuracy in dilution ratio calculation and system complexity in existing technologies are solved, thereby simplifying the system and improving its reliability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI XINQIAN TECHNOLOGY CO LTD
- Filing Date
- 2025-09-29
- Publication Date
- 2026-07-17
AI Technical Summary
In existing technologies, the dilution ratio is calculated by measuring the dilution gas flow rate and the total flow rate after mixing, which suffers from low accuracy and system complexity.
By directly measuring the flow rates of the sample gas and dilution gas, combined with a Venturi gas flow meter and an ejector mixer, thermal dilution and vacuum generation are achieved, bringing the Venturi gas flow meter to its critical state and simplifying the system structure.
It improves the accuracy of dilution ratio calculation, simplifies the system, and enhances the system's reliability and accuracy.
Smart Images
Figure CN224515257U_ABST
Abstract
Claims
1. A volatile particle removal apparatus, characterized by, include: A sampling head, a Venturi gas flow meter connected to the sampling head, a first ejector mixer connected to the Venturi gas flow meter, the first ejector mixer connected to a sample gas delivery channel of an evaporation tube, a second ejector mixer connected to the sample gas delivery channel, and a mixing tube connected to the second ejector mixer. The first ejector mixer is connected to the first flow meter, and a first flow control valve, a first electric heater and a first temperature sensor are sequentially arranged between the first flow meter and the first ejector mixer. The evaporation tube also includes a temperature control device disposed around the sample gas delivery channel; The second ejector mixer is connected to the second flow meter, and a second flow control valve is provided between the second flow meter and the second ejector mixer; The mixing tube has an outlet, and a particle counter sampling tube is also provided on the mixing tube and is connected to the mixing tube.
2. The volatile particle removal apparatus of claim 1, wherein, The sampling head collects sample gas through a circular tube and classifies particles through a cyclone separator.
3. The volatile particle removal apparatus of claim 1, wherein, The sampling head classifies the particles in the sample gas through a conical cap, which is supported on the sample gas delivery pipeline by a bracket, and the Venturi gas flow meter collects the sample gas.
4. The volatile particle removal apparatus of claim 1, wherein, The temperature control device includes an aluminum block that encloses the sample gas delivery channel. A second electric heater is installed inside the aluminum block. An insulation layer and a protective box are arranged in sequence around the aluminum block. The insulation layer and the protective box completely enclose the aluminum block. The second electric heater is connected to a heating controller.
5. The volatile particle removal apparatus of claim 1, wherein, The temperature control device includes an insulating layer, an electric heating wire, a heat insulation layer, and a protective box arranged sequentially around the sample gas delivery channel. The electric heating wire is connected to a heating controller.
6. A volatile particle removal device as claimed in claim 4 or 5, wherein, The heating controller is connected to the second temperature sensor.
7. The volatile particle removal device as described in claim 1, characterized in that, The first ejector mixer has a first conduit connecting a Venturi gas flow meter and a sample gas delivery channel, and further includes a first nozzle, a first annular cavity, and a first interface connected to the sample gas delivery channel; the first interface is connected to the first flow meter, and a first flow control valve, a first electric heater, and a first temperature sensor are sequentially arranged between the first flow meter and the first interface.
8. The volatile particle removal device as described in claim 1, characterized in that, The second ejector mixer has a second pipe that connects the sample gas delivery channel and the mixing pipe, and also includes a second nozzle, a second annular cavity and a second interface connected to the mixing pipe; the second interface is connected to the second flow meter, and a second flow control valve is provided between the second flow meter and the second interface.