Patent ID: 8272395
Filing Date: 2012-09-25
Classification: F16K,Y10T

Abstract:
1. A water dispensing device capable of recycling cold water comprising: a mixing valve connected with a first pipe for supplying cold water and a second pipe for supplying hot water and being turned on/off so that the cold water and the hot water mix at a proper proportion to be outputted; at least one watering member connected with an output end of the mixing valve; a bucket connected with the output end of the mixing valve and the first pipe to receive lower-pressure cold water when a diverter diverts flow to the bucket as a water temperature is too low, and as the mixing valve is opened and the lower-pressure cold water in the bucket reaches a predetermined condition, the lower-pressure cold water in the bucket is supplied to the first pipe so as to completely or partially replace high-pressure cold water; as the lower-pressure cold water in the bucket does not satisfy the predetermined condition, a supply of the low-pressure cold water is stopped, thereby restarting a supply of the high-pressure cold water; a control unit to sense a temperature of the water flow which passes through the mixing valve, as a sensed temperature is less than a water flowing set value, cooled water stored in the second pipe is recycled toward the bucket and then is supplied to the first pipe, thereby obtaining recycling and reusing purpose, while the sensed temperature is more than the water flowing set value, the cold water stored in the first pipe flows toward the at least one watering member; a pressure on-off valve connected with the first pipe and an output end of the bucket and allowing to be in an open state as the mixing valve is actuated, and as the water in the bucket is over a predetermined pressure, the output end of the bucket communicates with the first pipe, and the first pipe between the high-pressure cold water and the mixing valve is closed so that the low-pressure cold water from the bucket is guided to the first pipe; and as the pressure of the bucket is lower than the predetermined pressure, the output end of the bucket and the first pipe are closed, and the first pipe between the high-pressure cold water and the mixing valve is communicated to restart the supply of high-pressure cold water; wherein the pressure on-off valve is a sole valve and further comprises: a valve base including a high-pressure cold water inlet for inputting the high-pressure cold water, a cold water outlet, a low-pressure cold water intake for inputting the low-pressure cold water from the bucket and an inner chamber, all of which are in communication with each other; a first valve core defined in the inner chamber of the valve base and allowing to communicate the high-pressure cold water inlet and the cold water outlet with each other; as a pressure of the low-pressure cold water intake is over a predetermined pressure, the valve first core is pushed forward to close a high-pressure cold water passage; the first valve core including a low-pressure cold water passage to communicate with the low-pressure cold water intake and the cold water outlet; a first resilient element to keep the first valve core away from the high-pressure cold water passage so that the high-pressure cold water passage keeps in a communicating state and the first valve core owns elasticity to return its initial positions; a second valve core defined on a predetermined portion of the low-pressure cold water passage of the first valve core allowing to close the low-pressure cold water passage; while a pressure of the low-pressure cold water is over a predetermined pressure, the second valve core is pushed forward to open so that the input end of the bucket communicates with the first pipe via the low-pressure cold water intake, the low-pressure cold water intake, and the cold water outlet; a second resilient element to push the second valve core rearward so as to close the low-pressure cold water passage, such that the second valve core owns elasticity to return its original position.