Dental handpiece oiling machine

A dental handpiece oiling machine, comprising:

• a lubricating oil delivery circuit;
• a gas delivery circuit;
• and
• an atomizer respectively connected to the lubricating oil delivery circuit and the gas delivery circuit;
• wherein the atomizer comprises a gas acceleration structure configured for sharply accelerating gas coming from the gas delivery circuit to form an accelerated gas flow and an atomization structure configured for atomizing lubricating oil from the lubricating oil delivery circuit under an action of the accelerated gas flow to form oil mist;
• a cavity is formed in the atomizer and an oil nozzle is arranged in the cavity;
• the cavity comprises a throat formed between an outer wall of the oil nozzle and an inner wall of the cavity, a contracted section located at an upstream position of the throat, and an expanded section located at a downstream position of the throat;
• the contracted section is connected to the gas delivery circuit, and the oil nozzle is connected to the lubricating oil delivery circuit;
• the contracted section and the throat form the gas acceleration structure, and the expanded section forms the atomization structure;
• and
• the contracted section, the throat and the expanded section are connected in sequence such that the gas is sharply accelerated when flowing from the contracted section into the expanded section through the throat, and the lubricating oil is sucked out under the action of a negative pressure generated in an area in the vicinity of a tail end of the oil nozzle and is mixed with the accelerated gas flow to form oil mist which is output to a plurality of dental handpieces.