Soft-water system

A water softening system connected to a main line configured to supply raw water to a consumption site, wherein the water softening system removes at least part of an ionic material contained in the raw water supplied through the main line and supplies soft water containing a smaller amount of ionic material than the raw water to the consumption site, the water softening system comprising:

• a filter device configured to receive water derived from the raw water, remove at least part of an ionic material contained in the received water based on an electric force, and release first soft water containing a smaller amount of ionic material than the received water;
• a reservoir configured to store the first soft water supplied from the filter device and release second soft water derived from the stored first soft water, wherein at least one of the first soft water or the second soft water is supplied to the consumption site;
• a first supply line configured to supply the raw water from the main line to a front end of the filter device;
• a first discharge line configured to guide water released from the filter device to the consumption site;
• a second supply line configured to branch off from the first supply line and supply the raw water to the reservoir;
• a second discharge line connected from the reservoir to the first discharge line;
• and
• a controller configured to control the water softening system based on at least one of a supply amount of water supplied to the consumption site or an amount of the ionic material contained in the raw water, to selectively operate the water softening system in one of:
• a first mode, in which only the first soft water is supplied to the consumption site through the first discharge line;
• a second mode, in which only the second soft water is supplied to the consumption site through the second discharge line;
• and a third mode, in which the first soft water and the second soft water are together supplied to the consumption site through the first discharge line and the second discharge line,
• wherein when the supply amount exceeds a reference amount, the controller is configured to operate the water softening system in the second mode or the third mode, and is further configured to supply part of the raw water supplied from the main line to the filter device and to supply the rest of the raw water to the reservoir, and
• wherein the second supply line is connected to one side of the reservoir while being separated from the first discharge line and the second discharge line is connected to the other side of the reservoir such that the second soft water is supplied from the reservoir to the consumption site through the second discharge line, and the rest of the raw water is supplied from the main line to the reservoir through the second supply line without being mixed with the first soft water.