What is an explosion-proof space

Is the poster referring to the explosion-proof space of the inerting device in the urea process using the full-circulation aqueous solution method? Explosion-proof spaces primarily serve to relieve pressure, thereby protecting the entire equipment from damage.

In the poster’s question, it refers to the explosion-proof space inside a high-pressure washer; this explosion-proof space functions similar to a safety valve, except that pressure is released within the equipment itself. I wonder if the original poster has ever seen an actual explosion-proof plate used in high-pressure washers; seeing it in person would make it much easier to understand. He made several thin grooves evenly distributed across the sheet; the thickness at these grooves is very small. Once subjected to a pressure exceeding what these grooves can withstand, the sheet will break (there are two types of failure: fracturing and bursting). After breaking, the pressure is released into the explosion-proof space outside the sheet, which is what you’re asking about (in the case of fracturing, the pressure enters that space, and the breakdown of the explosion-proof plate can be observed from the operational signs).