Gas inlet structure for reagent kit

A gas inlet structure for a reagent kit, comprising:

• a gas inlet connecting pipe;
• and
• a plugging pipe arranged at one end of the gas inlet connecting pipe;
• and
• wherein the plugging pipe is provided with a gas nozzle plug, and the plugging pipe is in interference fit with the gas nozzle plug;
• and
• the gas nozzle plug is provided with a gas inlet blind hole that is arranged along an axis direction of the gas nozzle plug, and an opening end of the gas inlet blind hole faces the gas inlet connecting pipe;
• wherein the gas inlet connecting pipe and the plugging pipe are both annular pipes, and the gas nozzle plug is a cylindrical body;
• wherein an outer side wall of the gas nozzle plug is provided with a sealing boss along a circumference direction of the outer side wall;
• wherein a number of the sealing boss is two;
• and wherein the gas inlet blind hole comprises a frustum-shaped gas inlet hole and a cylindrical gas inlet hole that are interconnected with each other along the axis direction of the gas nozzle plug, and the frustum-shaped gas inlet hole is closer to the gas inlet connecting pipe than the cylindrical gas inlet hole, such that a gas needle, when being inserted in the gas inlet structure, passes through the cylindrical gas inlet hole, the frustum-shaped gas inlet hole and the gas inlet connecting pipe in sequence;
• the gas inlet blind hole ends within the gas nozzle plug with a closed end;
• a first bottom end of the frustum-shaped gas inlet hole is connected with the cylindrical gas inlet hole, and a second bottom end of the frustum-shaped gas inlet hole is the opening end of the gas inlet blind hole, a diameter of the second bottom end being greater than a diameter of the first bottom end, and the diameter of the second bottom end being greater than a diameter of the cylindrical gas inlet hole.