A venturi is provided herein that includes a tubular passageway, a pod, a first entry point, and a second entry point. The pod may be positioned and contained within the tubular passageway. The first entry point may introduce a first media into the venturi, and a second entry point may introduce a second media into the venturi. The first media and second media may be any media, including fluid or gas. The first media may mix with the second media to develop a mixed media, and the mixed media may flow around the pod. The pod may translate axially within the tubular passageway via a translation rod and a spring. The spring may cause the pod to translate axially based on a pressure of the fluid entering the venturi.

A liquid delivery system and a gas-liquid mixing device are provided. The gas-liquid mixing device includes a ROS (reactive oxygen species) generation module, a RNS (reactive nitrogen species) generation module, a venturi, and a control module. The ROS generation module and the RNS generation module can react with air through electrical breakdown effect to respectively generate a plurality of ROS gas particles and a plurality of RNS gas particles. The venturi can generate a negative pressure to draw in the ROS gas particles and the RNS gas particles, so as to be mixed into a liquid. The control module can control one of the ROS generation module and the RNS generation module to perform electrical breakdown effect to obtain a surge duration, and another one of the ROS generation module and the RNS generation module to perform electrical breakdown effect after the surge duration.

A flammable gas diluter includes: a dilution vessel comprising an outer envelope defining a longitudinal flow passage from an inlet to an outlet; at least one air inlet for directing a flow of air into the inlet of the diluter; and a flammable gas inlet arrangement. The dilution vessel has a plurality of gas flow directing formations arranged between the flammable gas inlet arrangement and the outlet, each being at a different position along a length of the dilution vessel. At least one of the plurality of gas flow formations is an inwardly directing gas flow formation for directing gas flow away from the outer envelope and at least one of the gas flow formations is an outwardly directing gas flow formation for directing gas flow towards the outer envelope.

A dust collecting device is provided. The dust collecting device includes a particle separation component, an airflow output component and a particle collection component. One side of the particle separation component extends outward to form a first gas input portion, one end of the particle separation component extends outward to form a first gas output portion, and another end of the particle separation component extends outward to form a foreign matter outlet portion. One side of the airflow output component extends outward to form an airflow inlet portion, one end of the airflow output component extends outward to form a second gas output portion, and another end of the airflow output component extends outward to form a second gas input portion. The second gas output portion is connected to the first gas input portion. The particle collection component is connected to the foreign matter outlet portion.