KR-20260065220-A - Filter washing system and method of control the same

KR20260065220AKR 20260065220 AKR20260065220 AKR 20260065220AKR-20260065220-A

Abstract

A filter cleaning system is disclosed. A filter cleaning system according to one aspect of the present invention comprises: a filter unit that receives raw water from the outside and filters it to generate purified water; a purified water extraction unit connected to the filter unit and receiving the generated purified water; a cleaning water tank separately provided from the purified water extraction unit and connected to the filter unit to receive the generated purified water and store it as cleaning water; a valve unit configured to adjust the flow path of the purified water or the cleaning water, each disposed in a flow path connecting the filter unit, the purified water extraction unit, and the cleaning water tank; and a controller electrically connected to the valve unit and controlling the valve unit, wherein the controller may be configured to control the valve unit such that a first state in which the generated purified water is provided to the cleaning water tank as cleaning water and a second state in which the cleaning water stored in the cleaning water tank is provided to the filter unit are alternately formed.

Inventors

김승연

Assignees

코웨이 주식회사

Dates

Publication Date: 20260508
Application Date: 20241101

Claims (12)

A filter unit that receives raw water from the outside and filters it to produce purified water; A water purification unit connected to the above filter unit and receiving the generated water purification unit; A washing water tank separately provided from the above-mentioned purified water extraction unit and connected to the above-mentioned filter unit to receive the generated purified water and store it as washing water; A valve unit configured to adjust the flow path of the purified water or the washing water, each disposed in a respective flow path connecting the filter unit, the purified water extraction unit, and the washing water tank; and It includes a controller that is electrically connected to the valve unit and controls the valve unit, and The above controller is, A valve unit configured to control the valve unit so that a first state in which the generated purified water is provided to the washing water tank as the washing water and a second state in which the washing water stored in the washing water tank is provided to the filter unit are alternately formed. Filter cleaning system.
In paragraph 1, The above filter unit is, A first filter connected to the outside; and It includes a second filter connected to the first filter on the downstream side of the first filter, and The above controller controls the valve unit so that the washing water is supplied to the first filter in the second state. Filter cleaning system.
In paragraph 2, A pump connected to the downstream side of the first filter and the upstream side of the second filter, respectively, and for moving the purified water and the washing water, is included. The above controller controls the valve section so that in the second state, the washing water passes through the pump and the second filter in sequence and is then supplied to the first filter. Filter cleaning system.
In paragraph 3, The above valve part is, A first valve located between the outside and the first filter; A second valve located between the first filter and the pump; A third valve located between the pump and the second filter; and It includes a fourth valve located between the second filter, the purified water discharge unit, and the washing water tank, and The first to fourth valves are equipped as 3-way valves, Filter cleaning system.
In paragraph 4, The above controller, in the first state, Controlling the first to fourth valves so that the external, the first filter, the pump, the second filter, and the wash water tank are connected to each other, Filter cleaning system.
In paragraph 4, A washing water outflow path connecting the washing water tank and the second valve; and It further includes a circulation path connecting the third valve and the first filter, The above controller, in the second state, The connection between the first filter and the pump is blocked, and the second valve is controlled so that the wash water outflow path and the pump are connected, and Controlling the third valve so that the connection between the pump and the second filter is blocked and the pump and the first filter are connected, Filter cleaning system.
In paragraph 1, The above controller is, After the above valve unit is controlled to the second state and a preset reference time has elapsed, the above valve unit is controlled to the first state. Filter cleaning system.
(a) A step in which a controller controls a valve unit to a zero state so that the purified water generated by filtering raw water can be extracted as purified water; (b) a step in which the controller controls the valve unit to a first state so that a portion of the generated integer is stored as washing water; (c) a step in which the controller controls the valve part to a second state so that the stored washing water washes the filter part; and (d) a step comprising controlling the valve unit such that the controller repeats the first state and the second state, Control method of a filter cleaning system.
In paragraph 8, The above step (a) is, (a1) A step in which the first valve control module controls the first valve so that the inlet path and the first filter are connected; (a2) A step in which the second valve control module controls the second valve so that the first filter and the pump are connected; (a3) A step in which the third valve control module controls the third valve so that the pump and the second filter are connected; (a4) A step of controlling the fourth valve so that the fourth valve control module is connected to the second filter and the water purification unit; and (a5) A step in which a pump control module operates a pump, Control method of a filter cleaning system.
In paragraph 8, The above step (b) is, (b1) A step in which the first valve control module controls the first valve so that the inlet path and the first filter are connected; (b2) A step in which the second valve control module controls the second valve so that the first filter and the pump are connected; (b3) A step in which the third valve control module controls the third valve so that the pump and the second filter are connected; (b4) A step in which the fourth valve control module controls the fourth valve so that the second filter and the wash water tank are connected; and (b5) A step in which a pump control module operates a pump, Control method of a filter cleaning system.
In paragraph 8, The above step (c) is, (c1) A step in which the first valve control module controls the first valve so that the outflow path and the first filter are connected; (c2) A step in which the second valve control module controls the second valve so that the connection between the first filter and the pump through the first filter outflow path (522) is blocked and the cleaning water tank and the pump are connected; (c3) A step in which the third valve control module controls the third valve such that the connection between the pump and the second filter is cut off and the pump and the first filter are connected through a circulation path; and (c4) A step in which a pump control module operates a pump, Control method of a filter cleaning system.
In paragraph 8, The above step (d) is, (d1) A time sensor generates detection information for the time elapsed after the valve part is controlled to the second state; (d2) A step in which the valve control module compares the detection information with preset reference time information; (d3) When the above detection information is greater than or equal to the above reference time information, the valve control module controls the valve part to the first state; (d4) The time sensor generates detection information for the time elapsed after the valve unit is controlled to the first state; (d5) A step in which the valve control module compares the detection information and the reference time information; and (d6) If the above detection information is greater than or equal to the above reference time information, the valve control module controls the valve part to the second state, the step of controlling the valve part to the second state. Control method of a filter cleaning system.

Description

Filter washing system and method of control the same The present invention relates to a filter cleaning system and a control method thereof, and more specifically, to a filter cleaning system and a control method thereof capable of backwashing a filter by repeatedly controlling the direction of a fluid flowing into a filter section. A water purifier is a general term for a device that receives raw water, filters it, and supplies it to users. With the improvement of living standards, the number of cases in which water purifiers are installed for drinking is increasing not only in commercial facilities but also in ordinary households. Methods for filtering raw water can be classified into physical or chemical methods. A typical water purifier includes a filtration component referred to as a filter. This component can remove impurities contained in the raw water by physically filtering the raw water passing through it. At this time, as the raw water filtration process is repeated, separated impurities may accumulate in the above components. In this case, there is a risk that the components may become clogged by the impurities, as well as a risk that the contamination level of the filtered purified water may increase. Furthermore, if this condition is left unchecked, not only the components but also their surroundings may become contaminated, potentially causing problems with the entire water purifier. To prevent this, various measures are being proposed to maintain the cleanliness of the above configuration. For example, a professional manager may periodically visit to disassemble and clean the configuration. However, this management method requires a skilled outsider to visit the location where the water purifier is installed. In other words, the very fact that an outsider visits raises concerns that it may cause discomfort among the residents of the place. Therefore, a method is required for the user to directly clean the above configuration or for the water purifier to clean the above configuration itself without external intervention. Korean Published Patent Document No. 10-2024-0053458 discloses a semi-permanent water purifier. Specifically, it discloses a semi-permanent water purifier that allows for semi-permanent use by directly washing the filter, as the filter can be easily disassembled and reassembled. However, the semi-permanent water purifier disclosed in the aforementioned prior art requires a process of separating the filter for cleaning. That is, while the prior art provides a method for a user to directly apply external force to clean the filter, it does not provide a method for the semi-permanent water purifier to clean the filter itself. Korean Published Patent Document No. 10-2023-0111372 discloses a cleaning method for a water purifier. Specifically, the method discloses a cleaning method for a water purifier comprising the steps of storing filtered water in a tank, supplying the stored water in the reverse direction to a filter element to backwash the filter element, and discharging the water used for backwashing. However, the cleaning method of a water purifier disclosed in the aforementioned prior art is limited to backwashing the filter element only once. In other words, the prior art fails to provide a method to improve cleaning efficiency when the filter element is not completely cleaned by the backwashing performed only once. FIG. 1 is a conceptual diagram illustrating the configuration of a filter cleaning system according to an embodiment of the present invention. Figure 2 is a block diagram illustrating the configuration of the filter cleaning system of Figure 1. Figure 3 is a conceptual diagram illustrating the flow path when the filter cleaning system of Figure 1 is operated in the zero state. FIG. 4 is a conceptual diagram illustrating the flow path when the filter cleaning system of FIG. 1 is operated in the first state. Figure 5 is a conceptual diagram illustrating the flow path when the filter cleaning system of Figure 1 is operated in a second state. FIG. 6 is a flowchart illustrating the flow of a control method for a filter cleaning system according to an embodiment of the present invention. Figure 7 is a flowchart illustrating the detailed flow of step S100 of the control method of the filter washing system of Figure 6. Figure 8 is a flowchart illustrating the detailed flow of step S200 of the control method of the filter washing system of Figure 6. Figure 9 is a flowchart illustrating the detailed flow of step S300 of the control method of the filter washing system of Figure 6. Figure 10 is a flowchart illustrating the detailed flow of step S400 of the control method of the filter washing system of Figure 6. Hereinafter, embodiments of the present invention are described in detail with reference to the attached drawings so that those skilled in the art can easily implement the present invention. The present invention may be embodied in various different forms and is no