Material output volume detecting device for automated beverage preparation apparatus

A material output volume detecting device (402) of an automated beverage preparation apparatus (100), the material output volume detecting device (402) comprising:

• a damper device (120), arranged to operably buffer liquid material flowing through the damper device (120);
• and
• a flowmeter (130), coupled with the damper device (120), arranged to operably measure a flow of the liquid material outputted from the damper device (120);
• and
• wherein the damper device (120) comprises:
• a damper base (420), comprising a material entrance hole (421), a material exit hole (423), and a material buffer chamber (425) located between the material entrance hole (421) and the material exit hole (423), wherein the material entrance hole (421) is arranged to operably transmit received liquid material to the material buffer chamber (425), the material buffer chamber (425) is arranged to temporarily store the liquid material flowing into the material buffer chamber (425), and the material exit hole (423) is arranged to operably transmit the liquid material passed through the material buffer chamber (425) toward the flowmeter (130);
• a block element (429), positioned in the material buffer chamber (425) and located in a straight path between the material entrance hole (421) and the material exit hole (423), arranged to operably prevent the liquid material from directly flowing from the material entrance hole (421) to the material exit hole (423) in a straight line path;
• a diaphragm (430), covered on the material buffer chamber (425);
• and
• a fastening element (440), positioned on the diaphragm (430) and having a hollow portion (442);
• wherein when a volume of the liquid material within the material buffer chamber (425) exceeds a predetermined amount, the diaphragm (430) deforms to protrude outward, so that a part of the diaphragm (430) enters the hollow portion (442) of the fastening element (440).