Abstract: An infuser includes a base having a cylindrical mounting base mounted on the base, a rotating ring surrounding the mounting base, a tubular structure with perforated top and bottom axially mounted on the top surface of the mounting base by liquid seal and a spring axially mounted between the base and rotating ring by precompression. The spring underprops the rotating ring permanently. A through flow channel is formed axially in the mounting base. The rotating ring is provided with a waterstop block. The waterstop block closes the flow channel by liquid seal. When the rotating ring rotates against the mounting base, it performs axially reciprocating motion against the mounting base at the same time. The waterstop block opens the flow channel optionally, the liquid in the tubular structure flows down through the flow channel.

Abstract: An infuser includes a base having a cylindrical mounting base mounted on the base, a rotating ring surrounding the mounting base, a tubular structure with perforated top and bottom axially mounted on the top surface of the mounting base by liquid seal and a spring axially mounted between the base and rotating ring by precompression. The spring underprops the rotating ring permanently. A through flow channel is formed axially in the mounting base. The rotating ring is provided with a waterstop block. The waterstop block closes the flow channel by liquid seal. When the rotating ring rotates against the mounting base, it performs axially reciprocating motion against the mounting base at the same time. The waterstop block opens the flow channel optionally, the liquid in the tubular structure flows down through the flow channel.

Abstract: A coffee percolator is provided having a funnel-shaped main body made of a thin stainless steel sheet and an inner layer component, wherein the sidewall of the main body is formed with a plurality of holes by means of etching technology; the inner layer component is fixed on the inner side of the sidewall of the main body. The inner layer component is provided with second holes with smaller diameter than that of the first holes provided on the sidewall of the main body. Through the double-layer wall structure made up of the inner layer component and main body side wall for the liquid to pass through and the fine second holes provided on the inner layer component, coffee grounds and foreign bodies can be completely prevented from passing through the sidewall when preparing and filtering coffee, so that the coffee prepared by the user has better purity and taste.