Patent ID: 8685251

Claim:
A water purification and supply system for a medical device, the system comprising: a reverse-osmosis filter with a water inlet, a filtered water outlet, and a filter waste water outlet; a pump in fluid communication with and downstream from the filtered water outlet; a first heat exchanger having a filtered water inlet, a filtered water outlet, a waste water inlet and a waste water outlet, the filtered water inlet in fluid communication with and downstream from the pump, the waste water outlet in fluid communication with a drain; a heater in fluid communication with and downstream from the filtered water outlet of the first heat exchanger; a second heat exchanger having a filtered water inlet, a filtered water outlet, a waste water inlet, and a waste water outlet, the filtered water inlet in fluid communication with and downstream from the heater, the waste water inlet of the first heat exchanger in fluid communication with and downstream from the waste water outlet of the second heat exchanger; a throttle valve in fluid communication with and downstream from the filtered water outlet of the second heat exchanger; and a proportioning valve having a valve inlet, a first valve outlet and a second valve outlet, the valve inlet in communication with and downstream from the filter waste water outlet, the second valve outlet in communication with the drain, the first valve outlet in fluid communication with the waste water inlet of the second heat exchanger.