A filter structure having a function of selectively collecting water through opposite ends thereof, which includes a housing of which at least one side end is open and a separation membrane module which is disposed in the housing with at least one filtering sheet wound around an outer surface of a water passage pipe having at least one inlet hole formed therein to filter a raw water passing through the inside of the separation membrane module into a clean water and a concentrate, the filter structure comprising:
- a first sealing portion which has a first entry/exit selectively opened or closed by a first opening/closing valve and a second entry/exit selectively opened or closed by a second opening/closing valve and is configured to seal one end of the housing;
- a second sealing portion which has an outlet connected to communicate with an open end on one side of the water passage pipe, has a third entry/exit selectively opened or closed by a third opening/closing valve and a fourth entry/exit selectively opened or closed by a fourth opening/closing valve, and is configured to seal the other end of the housing;
- and
- a controller which is configured to control opening/closing operations of the first and second opening/closing valves, control opening/closing operations of the third and fourth opening/closing valves, and, in order to form a forward fluid flow from the first sealing portion to the second sealing portion or form a reverse fluid flow from the second sealing portion to the first sealing portion, control the supply of the raw water through any one of the first entry/exit and the second entry/exit or control the supply of the raw water through any one of the third entry/exit and the fourth entry/exit;
- wherein
- the outlet is connected in communication with an open end of a water passage pipe whose end corresponding to the first sealing portion is sealed,
- wherein the controller is electrically connected to a flowmeter configured to measure a discharge amount of the clean water discharged to the outside through the outlet in real time and, using an operation signal based on a change value of the discharge amount of the clean water that is measured by the flowmeter, controls the opening/closing operations of the first and second opening/closing valves to selectively open one of the first entry/exit and the second entry/exit and controls the opening/closing operations of the third and fourth opening/closing valves to selectively open one of the third entry/exit and the fourth entry/exit,
- further comprising a sealing portion configured to separate the raw water supplied to pass through the separation membrane module and the concentrate discharged from the separation membrane module to prevent the raw water and the concentrate from being mixed with each other,
- wherein the sealing portion includes a first blocking seal which is disposed at an outer surface of one side end of the separation membrane module, which corresponds to the first sealing portion, and has an outer side end coming in contact with an inner surface of the housing and a second blocking seal which is disposed at an outer surface of the other side end of the separation membrane module, which corresponds to the second sealing portion, and has an outer side end coming in contact with the inner surface of the housing.