Beverage dispenser
First Claim
Patent Images
1. A beverage dispenser comprising:
- a) a controller, comprising;
i) at least one control signal output ii) at least one sensor input;
iii) a user input interface;
iv) control logic coupled to the at least one control signal output, the at least one sensor input and the user input interface, such that the control logic controls at least one control signal output in response to user input at the user input interface;
b) a source of circulating hot liquid;
c) a water input coupled to a water supply;
d) a liquid-to-liquid heat exchanger having an input coupled to the water input, an output for heated water, and a heat-exchange circuit through which the circulating hot liquid from the heat source circulates, such that water from the input is heated by exchange with the hot liquid, and the water exits from the output of the heat exchanger at an elevated temperature;
e) a hot valve having an input coupled to the output of the heat exchanger, a control input for controlling flow through the valve in response to a signal from a control output of the controller, and an output for dispensing hot water under control of the control input; and
f) a beverage dispensing output coupled to the output of the hot valve.
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Abstract
A beverage dispenser and method of operation, in which incoming water for beverage preparation is heated by a liquid-to-liquid heat exchanger. The heated water may be mixed with cold water using controlled valves, to generate a selected temperature stream. This controlled-temperature stream may be mixed with beverage concentrate or sprayed over coffee grounds to brew fresh coffee.
90 Citations
28 Claims
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1. A beverage dispenser comprising:
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a) a controller, comprising;
i) at least one control signal output ii) at least one sensor input;
iii) a user input interface;
iv) control logic coupled to the at least one control signal output, the at least one sensor input and the user input interface, such that the control logic controls at least one control signal output in response to user input at the user input interface;
b) a source of circulating hot liquid;
c) a water input coupled to a water supply;
d) a liquid-to-liquid heat exchanger having an input coupled to the water input, an output for heated water, and a heat-exchange circuit through which the circulating hot liquid from the heat source circulates, such that water from the input is heated by exchange with the hot liquid, and the water exits from the output of the heat exchanger at an elevated temperature;
e) a hot valve having an input coupled to the output of the heat exchanger, a control input for controlling flow through the valve in response to a signal from a control output of the controller, and an output for dispensing hot water under control of the control input; and
f) a beverage dispensing output coupled to the output of the hot valve. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A method of dispensing beverage at a selected temperatures from a liquid concentrate in a beverage dispenser comprising a controller, comprising at least one control signal output, at least one sensor input, a user input interface, control logic coupled to the at least one control signal output, the at least one sensor input and the user input interface, such that the control logic controls at least one control signal output in response to user input at the user input interface, a source of circulating hot liquid;
- a water input coupled to a water supply, a liquid-to-liquid heat exchanger having an input coupled to the water input, an output for heated water, and a heat-exchange circuit through which the circulating hot liquid from the heat source circulates, such that water from the input is heated by exchange with the hot liquid, and the water exits from the output of the heat exchanger at an elevated temperature, a hot valve having an input coupled to the output of the heat exchanger, a control input for controlling flow through the valve in response to a signal from a control output of the controller, and an output for dispensing hot water under control of the control input;
a cold valve having an input coupled to the water input, a control input for controlling flow through the valve in response to a signal from a control output of the controller and an output for dispensing cold water under control of the control input, a temperature mixing junction coupled to the output of the hot valve and the output of the cold valve, for mixing the hot water and cold water into a mixed water stream coupled to a beverage dispensing output; and
a temperature sensor sensing the temperature of the mixed water stream, having an output coupled to a sensor input of the controller, comprising the steps of;
reading the temperature of the mixed water stream from the sensor input coupled to the temperature sensor, and maintaining the stream of mixed water at a selected temperature by varying a duty cycle of pulse-width modulated signals on the control input of the hot valve and on the control input of the cold valve. - View Dependent Claims (26, 27, 28)
- a water input coupled to a water supply, a liquid-to-liquid heat exchanger having an input coupled to the water input, an output for heated water, and a heat-exchange circuit through which the circulating hot liquid from the heat source circulates, such that water from the input is heated by exchange with the hot liquid, and the water exits from the output of the heat exchanger at an elevated temperature, a hot valve having an input coupled to the output of the heat exchanger, a control input for controlling flow through the valve in response to a signal from a control output of the controller, and an output for dispensing hot water under control of the control input;
Specification