| 摘要 |
A battery operated self-contained submersible liquid dispenser for dispensing discrete quantities of a liquid from a remote liquid reservoir is provided. The dispenser comprises a hermetically sealed walled housing (1) containing a peristaltic pump (5) driven either directly or via a speed reduction gear train (3) by an electric motor (2) in response to motor activation signals received from an electric control circuit (7) within the housing. The pump includes a flexible liquid dispensing tube (9) connected to respective liquid inlet and liquid outlet ports (10, 11) extending through the wall of the housing, a pump actuator (12) for forcing liquid received via the liquid inlet port through the tube to the outlet port, and a sensor (8) on or in the wall of the housing connected to the circuit. The sensor is adapted to sense a changed condition from a required parameter external to the housing, e.g. such as the presence or absence of water, the circuit thereafter activating the motor and hence the pump' to dispense a discrete quantity of the liquid.
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