EJECTOR, DISPENSE DEVICE AND LAUNDRY TREATMENT APPARATUS

An ejector for a laundry treatment appliance, a dispensing device and a laundry treatment appliance are provided. The ejector comprises, a flow channel, allowing water flow to flow through and formed by a front chamber portion, a connection portion and a rear chamber portion which are connected in sequence. The connection portion is provided with a gap for communicating the flow channel with the outside atmosphere, a water outlet end of the front chamber portion is provided with an ejection hole for allowing water to flow into the rear chamber portion through the connection portion, a water inlet end of the rear chamber portion is provided with an injection hole for receiving the water flow from the ejection hole. The rear chamber portion is provided with a variable-diameter flow channel with a cross-sectional dimension gradually increasing in a direction of water flow. By the arrangement of the gap for communicating the flow channel with the outside atmosphere, the backflow water is discharged from the gap of the ejector, to preventing water in the waterway in which the ejector is arranged from flowing back. The variable-diameter flow channel widening in the direction of the inlet water flow is arranged downstream of the gap of the ejector, to hinder water to flow back, thereby the backflow water is effectively prevented from flowing back into the upstream tap water pipe.