Drinking water supply device and method of controlling a drinking water supply device

Patent metadata

Field	Value
Publication number	US-10399874-B2
Application number	US-201514963418-A
Country	US
Kind code	B2
Filing date	Dec 9, 2015
Priority date	Dec 11, 2014
Publication date	Sep 3, 2019
Grant date	Sep 3, 2019

Abstract

A drinking water supply device may include a filtered water pipe, a flow rate sensor, a water supply pipe, a mineral supply pipe provided with a mineral supply valve, a mineral cartridge configured to connect to the mineral supply pipe, a mineral mixer configured to connect to the water supply pipe and the mineral supply pipe and configured to allow mixing of the minerals from the mineral supply pipe with the filtered water in the water supply pipe, a pump, a discharge pipe configured to connect to the mineral mixer and the water supply pipe, and a controller configured to control an output voltage of the pump in order to adjust an amount of minerals that are supplied to the water supply pipe based on a flow rate sensed by the flow rate sensor.

First claim

What is claimed is:

1. A drinking water supply device comprising:
a filtered water pipe configured to channel filtered water that has been filtered through a filter;
a flow rate sensor configured to sense a flow rate of the filtered water;
a mineral sensor provided in the filtered water pipe and configured to detect a mineral content of the filtered water;
a water supply pipe provided downstream of the filtered water pipe;
a mineral supply pipe configured to supply minerals to the water supply pipe and provided with a mineral supply valve configured to selectively open and close depending on whether or not mineral water is to be generated;
a mineral cartridge configured to connect to the mineral supply pipe and configured to store condensed minerals;
a mineral mixer configured to connect to the water supply pipe and the mineral supply pipe and configured to allow mixing of the minerals from the mineral supply pipe with the filtered water in the water supply pipe;
a pump configured to pressurize at least one of the mineral cartridge or the mineral supply pipe such that the minerals stored in the mineral cartridge are supplied to the mineral mixer;
a water discharge pipe configured to connect to the mineral mixer and the water supply pipe to discharge filtered water or mineral water; and
a controller configured to control an output voltage of the pump in order to adjust an amount of minerals that are supplied to the water supply pipe based on a flow rate sensed by the flow rate sensor,
wherein the flow rate sensor and the mineral sensor are provided downstream of the filter and upstream of the water discharge pipe,
wherein the controller selects one of a plurality of data tables according to the mineral content detected by the mineral sensor, and controls the output voltage of the pump based on the selected data table, each of the data tables identifying output voltages per flow rates based on a corresponding mineral content range,
wherein the filtered water pipe includes a cold water pipe that diverges from the filtered water pipe to channel cold water that has passed through a cooling unit, and a distribution pipe configured to connect the filtered water pipe with the cold water pipe, and
wherein the water discharge pipe is configured to connect to the mineral mixer and configured to selectively discharge filtered water or cold water from the distribution pipe.

2. The drinking water supply device according to claim 1 , wherein the pump includes a motor configured to vary a number of rotations based on the output voltage of the pump.

3. The drinking water supply device according to claim 1 , wherein the controller compares the flow rate sensed by the flow rate sensor with a predetermined reference flow rate and increases the output voltage of the pump in order to increase the amount of minerals that are supplied when the sensed flow rate is greater than the reference flow rate.

4. The drinking water supply device according to claim 1 , wherein the controller compares the flow rate sensed by the flow rate sensor with a predetermined reference flow rate and decreases the output voltage of the pump in order to decrease the amount of minerals that are supplied when the sensed flow rate is less than the reference flow rate.

5. The drinking water supply device according to claim 1 , wherein the controller adjusts the output voltage of the pump to equal a predetermined output voltage value based on the sensed flow rate using the selected data table.

6. The drinking water supply device according to claim 1 , wherein the flow rate sensor is provided downstream of the mineral sensor.

7. The drinking water supply device according to claim 1 , wherein the controller selects the output voltage based on an entry in the selected data table associated with the flow rate sensed by the flow rate sensor to adjust the output voltage of the pump.

8. A drinking water supply device comprising:
a filtered water pipe configured to channel filtered water that has been filtered through a filter;
a mineral sensor provided in the filtered water pipe and configured to detect a mineral content of the filtered water;
a water supply pipe provided downstream of the filtered water pipe;
a mineral supply pipe configured to supply minerals to the water supply pipe and provided with a mineral supply valve configured to selectively open and close depending on whether or not mineral water is to be generated;
a mineral cartridge configured to connect to the mineral supply pipe and configured to store condensed minerals;
a mineral mixer configured to connect to the water supply pipe and the mineral supply pipe and configured to allow mixing of the minerals from the mineral supply pipe with the filtered water in the water supply pipe;
a constant speed pump configured to pressurize at least one of the mineral cartridge or the mineral supply pipe such that the minerals stored in the mineral cartridge are supplied to the mineral mixer;
a water discharge pipe configured to connect to the mineral mixer and the water supply pipe to discharge filtered water or mineral water; and
a controller configured to control an opening time of the mineral supply valve in order to adjust an amount of minerals that are supplied to the water supply pipe based on the mineral content sensed by the mineral sensor, wherein the mineral sensor is provided downstream of the filter and upstream of the water discharge pipe,
wherein the filtered water pipe includes a cold water pipe that diverges from the filtered water pipe to channel cold water that has passed through a cooling unit, and a distribution pipe configured to connect the filtered water pipe with the cold water pipe, and
wherein the water discharge pipe is configured to connect to the mineral mixer and configured to selectively discharge filtered water or cold water from the distribution pipe.

9. The drinking water supply device according to claim 8 , wherein the controller is further configured to control the opening time of the mineral supply valve based on a region or a season associated with the drinking water supply device.

10. A method of controlling a drinking water supply device comprising a mineral water supply module that includes a filtered water pipe that channels filtered water that has been filtered by a filter, a water discharge pipe that discharges filtered water or mineral water, a mineral supply pipe, a mineral mixer that connects to a water supply pipe and that allows mixing of the minerals from the mineral supply pipe with the filtered water in the water supply pipe, the filtered water pipe, and the mineral supply pipe, a mineral cartridge that connects to the mineral supply pipe and that stores condensed minerals, and a pump that pressurizes the mineral supply pipe or the mineral cartridge to allow discharge of the minerals from the mineral cartridge, the method comprising:
detecting a mineral content and a flow rate of filtered water using a mineral sensor and a flow rate sensor provided in the filtered water pipe;
supplying filtered water to the mineral mixer through the water supply pipe;
adjusting an output voltage of the pump in order to control an amount of minerals that are supplied from the mineral supply pipe to the mineral mixer based on the mineral content and flow rate of the filtered water detected;
operating the pump based on the adjusted output voltage of the pump to discharge a predetermined amount of minerals to the mineral mixer;
mixing the minerals discharged with the filtered water supplied in the mineral mixer to generate mineral water; and
discharging the mineral water generated from mixing the minerals discharged with the filtered water supplied in the miner

Assignees

• Lg Electronics Inc

Inventors

• Lee Sangduck
• Yu Kiwon

Classifications

• C02F2307/10

  as part of a potable water dispenser, e.g. for use in homes or offices · CPC title

• C02F1/686 Primary

  Devices for dosing liquid additives · CPC title

• C02F1/008

  Control or steering systems not provided for elsewhere in subclass C02F · CPC title

• C02F2209/005

  Processes using a programmable logic controller [PLC] · CPC title

• C02F2209/40

  Liquid flow rate · CPC title