KR102788525B1 - Water treatment apparatus - Google Patents

Abstract

Start the water treatment plant.
A water treatment device according to one embodiment of the present invention may include a filtration unit that filters water supplied from a water supply source and includes a reverse osmosis filter; a flushing unit that includes a flushing tank in which water filtered by the reverse osmosis filter is stored and discharged as flushing water; and a control unit that causes water to be filtered in the filtration unit and supplied to a user, or causes water filtered by the reverse osmosis filter to be stored as flushing water in the flushing tank, or causes flushing water to be discharged from the flushing tank to flush the reverse osmosis filter.

Description

WATER TREATMENT APPARATUS

The present invention relates to a water treatment device for treating water, such as by filtering it.

A water treatment device is a device that treats water and supplies it to users.

In a water treatment facility, water is filtered and supplied to users, water is electrolyzed to create alkaline water and supplied to users, or carbon dioxide is dissolved in water to create carbonated water and supplied to users.

When filtering water and supplying it to the user, the water treatment device includes a water purification filter to filter the water.

Among these water filters, there is a reverse osmosis filter equipped with a reverse osmosis membrane. Water that flows into the reverse osmosis filter at a certain pressure is filtered as it passes through the reverse osmosis membrane of the reverse osmosis filter. And water that does not pass through the reverse osmosis membrane is discharged from the reverse osmosis filter as living water.

Therefore, in a reverse osmosis filter, water with a high TDS (Total Dissolved Solids) concentration, i.e. unfiltered water, exists on one side of the reverse osmosis membrane, and water with a low TDS concentration, i.e. filtered water, exists on the other side.

For example, a reverse osmosis filter is divided into a non-filtration side and a filtration side by a reverse osmosis membrane.

Meanwhile, while water is not filtered through the reverse osmosis filter, the water on the filtered side of the reverse osmosis filter moves to the non-filtered side due to osmotic pressure. Accordingly, the TDS concentration of the water on the filtered side of the reverse osmosis filter increases and becomes similar to the TDS concentration of the water on the non-filtered side.

In this state, when the filtration of water through the reverse osmosis filter is resumed, water with a high TDS concentration on the filtration side of the reverse osmosis filter is initially supplied to the user, and this phenomenon is called the creep phenomenon.

The present invention has been made in recognition of at least one of the above-mentioned conventional needs or problems.

One aspect of the purpose of the present invention is to prevent water with a high TDS concentration from being discharged and supplied to users at the initial stage of filtration when filtering water using a reverse osmosis filter.

Another aspect of the present invention is to flush a reverse osmosis filter with water filtered from the reverse osmosis filter.

Another aspect of the present invention is to increase the removal rate and recovery rate of a reverse osmosis filter and to enable control of the removal rate and recovery rate.

A water treatment device related to an embodiment for realizing at least one of the above tasks may include the following features.

A water treatment device according to one embodiment of the present invention may include a filtration unit that filters water supplied from a water supply source and includes a reverse osmosis filter; a flushing unit that includes a flushing tank in which water filtered by the reverse osmosis filter is stored and discharged as flushing water; and a control unit that causes water to be filtered in the filtration unit and supplied to a user, or causes water filtered by the reverse osmosis filter to be stored as flushing water in the flushing tank, or causes flushing water to be discharged from the flushing tank to flush the reverse osmosis filter.

In this case, the reverse osmosis filter can be divided into a non-filtration side and a filtration side by a reverse osmosis membrane.

Additionally, the non-filtering side of the reverse osmosis filter can be flushed with flushing water.

And, an inlet line for allowing water to flow into the reverse osmosis filter and a drain line for discharging flushing water that flushes the non-filtered side may be connected to the non-filtered side, and an outlet line for discharging filtered water that passes through the reverse osmosis membrane may be connected to the filtered side.

Additionally, the flushing tank may be connected to a tank inlet line connected to the outlet line and a tank outlet line connected to the inlet line.

And, a first opening/closing valve may be provided in the inlet line before the point where the tank outlet line is connected, a second opening/closing valve may be provided in the drain line, and a third opening/closing valve may be provided in the outlet line after the point where the tank inlet line is connected.

In addition, the control unit can open the first and third opening/closing valves and close the second opening/closing valve to allow water to be filtered in the filter unit and discharged to the outside.

And, the control unit can open the first opening/closing valve and close the second opening/closing valve and the third opening/closing valve so that the water filtered in the reverse osmosis filter is stored in the flushing tank as flushing water.

In addition, the control unit can open the second opening/closing valve and close the first opening/closing valve and the third opening/closing valve to discharge flushing water from the flushing tank and flush the reverse osmosis filter.

In addition, a check valve may be provided in the portion of the outlet line between the filter side and the tank inlet line to allow water to flow only in the direction of the outlet line from the filter side.

Additionally, the tank outlet line may be provided with a flushing check valve that allows water to flow only in the direction of the inlet line from the flushing tank.

In addition, an electrolysis unit that electrolyzes water to create sterilized water may be provided in the tank inlet line or the tank outlet line.

Additionally, the control unit can operate the electrolysis unit when water flows in the tank inlet line or the tank outlet line.

Additionally, an air layer may always exist in the flushing tank.

Additionally, the flushing tank may be equipped with a tank check valve to prevent air from being discharged to the outside when storing filtered water.

In addition, the flushing tank is equipped with a sterilizing unit containing a sterilizing agent, and the sterilizing unit can cause the sterilizing agent to be dissolved in the flushing water stored in the flushing tank by the pressure of the air layer that increases as filtered water flows into the flushing tank as flushing water.

In addition, the sterilizing unit may include a container provided in the flushing tank to contain the sterilizing substance, one side of which is open and the other side of which has an outlet formed to discharge the sterilizing substance, and a pressurizing member movably provided on the open side of the container to pressurize the sterilizing substance according to the pressure of the air layer so that the sterilizing substance is discharged through the outlet.

Additionally, the flushing tank may include an elastic storage member that expands when water is introduced and contracts when water is discharged.

In addition, the method may further include a storage tank connected to the discharge line and storing water filtered in the filter unit.

Figure 1 is a drawing showing a first embodiment of a water treatment device according to the present invention.
Figures 2 to 4 are drawings showing the operation of a first embodiment of a water treatment device according to the present invention.
Figure 5 is a drawing showing a second embodiment of a water treatment device according to the present invention.
Figure 6 is a drawing showing a third embodiment of a water treatment device according to the present invention.
Figure 7 is a drawing showing a fourth embodiment of a water treatment device according to the present invention.
Figure 8 is a drawing showing a fifth embodiment of a water treatment device according to the present invention.

In order to help understand the features of the present invention as described above, a water treatment device related to an embodiment of the present invention will be described in more detail below.

The embodiments described below will be described based on the embodiments most suitable for understanding the technical features of the present invention, and the technical features of the present invention are not limited by the embodiments described, but rather are exemplified that the present invention can be implemented as in the embodiments described below. Accordingly, the present invention can be implemented in various modified embodiments within the technical scope of the present invention through the embodiments described below, and such modified embodiments fall within the technical scope of the present invention. In addition, in order to help understanding the embodiments described below, among the components that perform the same function in each embodiment, related components are indicated with the same or extended numbers in the symbols described in the attached drawings.

Water treatment device First embodiment

Hereinafter, a first embodiment of a water treatment device according to the present invention will be described with reference to FIGS. 1 to 4.

Figure 1 is a drawing showing a first embodiment of a water treatment device according to the present invention, and Figures 2 to 4 are drawings showing the operation of the first embodiment of the water treatment device according to the present invention.

A first embodiment of a water treatment device (100) according to the present invention may include a filtering unit (200), a flushing unit (300), and a control unit (400) as shown in FIG. 1.

The filter unit (200) can filter water supplied from a water supply source (not shown). For this purpose, the filter unit (200) can include a reverse osmosis filter (210).

The reverse osmosis filter (210) can be partitioned into a non-filtration side (211) and a filtration side (212) by a reverse osmosis membrane (M) as illustrated in Fig. 1. For example, by providing the reverse osmosis membrane (M) in a rounded state inside the reverse osmosis filter (210), the reverse osmosis filter (210) can be partitioned into a non-filtration side (211) and a filtration side (212).

However, the configuration in which the reverse osmosis filter (210) is divided into a non-filtration side (211) and a filtration side (212) by the reverse osmosis membrane (M) is not particularly limited, and any known configuration is possible.

An inlet line (LWI) and a drain line (LWD) can be connected to the non-filtering side (211) of the reverse osmosis filter (210).

Through the inlet line (LWI), water to be filtered, as shown in FIGS. 2 and 3, can be introduced into the reverse osmosis filter (210), i.e., the non-filtering side (211) of the reverse osmosis filter (210). In addition, through a part of the inlet line (LWI), flushing water stored in a flushing tank (310) included in the flushing unit (300), which will be described later, can be introduced into the reverse osmosis filter (210), i.e., the non-filtering side (211) of the reverse osmosis filter (210), as shown in FIG. 4.

And, through the drain line (LWD), as shown in Fig. 4, flushing water that flushes the reverse osmosis filter (210), for example, flushing the non-filtered side (211) of the reverse osmosis filter (210), can be discharged to the outside.

The inlet line (LWI) may be equipped with a first shut-off valve (V1). For example, as illustrated in Fig. 1, the first shut-off valve (V1) may be equipped in the inlet line (LWI) before the location where the tank outlet line (LTO), which will be described later, is connected.

The first opening/closing valve (V1) can be electrically connected to the control unit (400). Then, when the first opening/closing valve (V1) is opened by the control unit (400), water to be filtered can flow into the reverse osmosis filter (210) through the inlet line (LWI) as shown in FIGS. 2 and 3.

The drain line (LWD) may be equipped with a second shut-off valve (V2). The second shut-off valve (V2) may be electrically connected to the control unit (400). Then, when the second shut-off valve (V2) is opened by the control unit (400), as shown in Fig. 4, the flushing water that flushes the reverse osmosis filter (210), for example, the non-filtering side (211) of the reverse osmosis filter (210), may be discharged to the outside.

A water discharge line (LWO) may be connected to the filtering side (212) of the reverse osmosis filter (210). Through the water discharge line (LWO), filtered water may be discharged by passing through the reverse osmosis membrane (M) of the reverse osmosis filter (210) as shown in FIGS. 2 and 3.

The outlet line (LWO) may be equipped with a third shut-off valve (V3). For example, as shown in Fig. 1, the third shut-off valve (V3) may be equipped in the outlet line (LWO) after the place where the tank inlet line (LTI) described later is connected.

The third opening/closing valve (V3) can be electrically connected to the control unit (400). Then, when the third opening/closing valve (V3) is opened by the control unit (400), as shown in Fig. 2, the water filtered in the filter unit (200) can be discharged to the outside and supplied to the user.

A check valve (CV) may be provided in the portion of the outlet line (LWO) between the filtration side (212) of the reverse osmosis filter (210) and the tank inlet line (LTI) where it is connected. By the check valve (CV), water can only flow in the direction of the outlet line (LWO) from the filtration side (212) of the reverse osmosis filter (210).

Meanwhile, the filtration unit (200) may further include a pretreatment filter (220) and a posttreatment filter (230) as shown in Fig. 1 in addition to the aforementioned reverse osmosis filter (210) for filtering water supplied from a water supply source.

However, the water purification filter additionally included in addition to the reverse osmosis filter (210) for filtering water supplied from a water source to the filter unit (200) is not particularly limited, and any known water purification filter may be included.

The pretreatment filter (220) may be connected to the intake line (LWI) as illustrated in FIG. 1. For example, the pretreatment filter (220) may be connected to a portion of the intake line (LWI) before the first on-off valve (V1). However, the pretreatment filter (220) may also be connected to a portion of the intake line (LWI) between where the first on-off valve (V1) and the tank outlet line (LTO) are connected.

The water inlet line (LWI) can be connected to a water supply source, such as a tap water supply source. Then, when the first opening/closing valve (V1) of the water inlet line (LWI) is opened by the control unit (400), water from the water supply source, such as raw water, can first flow into the pretreatment filter (220) through the water inlet line (LWI) and be filtered, as shown in FIGS. 2 and 3. In addition, water filtered by the pretreatment filter (220), i.e. purified water, can flow into the reverse osmosis filter (210) through the water inlet line (LWI).

The post-treatment filter (230) may be connected to the outlet line (LWO) as illustrated in Fig. 1. For example, the post-treatment filter (230) may be connected to a portion of the outlet line (LWO) between where the tank inlet line (LTI) is connected and the third on-off valve (V3). However, the post-treatment filter (230) may also be connected to a portion of the outlet line (LWO) after the third on-off valve (V3).

The water outlet line (LWO) can be connected to a discharge member (not shown) such as a cock or a faucet. Then, when the third opening/closing valve (V3) of the water outlet line (LWO) is opened by the control unit (400), as shown in FIG. 2, the water filtered in the reverse osmosis filter (210), i.e., purified water, can flow into the post-treatment filter (230) through the water outlet line (LWO) and be filtered. In addition, the water filtered in the post-treatment filter (230), i.e., purified water, can flow through the water outlet line (LWO) and be discharged to the outside through a discharge member such as a cock or a faucet and supplied to the user.

The flushing unit (300) may include a flushing tank (310). The flushing tank (310) may store water filtered by the reverse osmosis filter (210) as flushing water. In this way, the flushing water stored in the flushing tank (310) may be discharged from the flushing tank (310) as shown in FIG. 4 to flush the reverse osmosis filter (210) of the filtration unit (200), for example, the non-filtering side (211) of the reverse osmosis filter (210).

A tank inlet line (LTI) and a tank outlet line (LTO) can be connected to the flushing tank (310).

The tank inlet line (LTI) may be connected to the outlet line (LWO). For example, the tank inlet line (LTI) may be connected to a portion of the outlet line (LWO) between the filtering side (212) of the reverse osmosis filter (210) of the filtration unit (200) and the post-treatment filter (230), as illustrated in FIG. 1.

As shown in Fig. 3, water filtered in the reverse osmosis filter (210) of the filtration unit (200) can be introduced into the flushing tank (310) through the tank inlet line (LTI) and stored as flushing water.

The tank outlet line (LTO) may be connected to the inlet line (LWI). For example, the tank outlet line (LTO) may be connected to a portion of the inlet line (LWI) between the first valve (V1) and the non-filtering side (211) of the reverse osmosis filter (210) of the filtration unit (200), as shown in FIG. 1.

As shown in Fig. 4, flushing water stored in the flushing tank (310) can be introduced into the non-filtering side (211) of the reverse osmosis filter (210) of the filtration unit (200) through the tank discharge line (LTO) to flush the non-filtering side (211).

A flushing check valve (CVF) may be provided in the tank outlet line (LTO). The flushing check valve (CVF) allows water to flow only from the flushing tank (310) toward the inlet line (LWI). Accordingly, when water is filtered in the filtering unit (200) and discharged to the outside as shown in Fig. 2, the water filtered in the pretreatment filter (220) may not flow into the flushing tank (310) through the tank outlet line (LTO).

An air layer (A) may always exist in the flushing tank (310) as shown in FIGS. 2 and 3. To this end, the flushing tank (310) may be provided with a tank check valve (CVT) as shown in FIG. 1. By means of this tank check valve (CVT), when the water filtered in the reverse osmosis filter (210) as shown in FIG. 3 flows into the flushing tank (310) as flushing water and is stored, the air inside the flushing tank (310) may not be discharged to the outside.

As shown in Fig. 2, when filtered water flows into the flushing tank (310) and is not stored as flushing water, the flushing tank (310) is empty. Accordingly, an air layer (A) exists in the flushing tank (310). That is, in this case, the entire flushing tank (310) is filled with air.

In addition, as shown in Fig. 3, when water filtered in the reverse osmosis filter (210) of the filtration unit (200) is stored as flushing water in the flushing tank (310), the air in the flushing tank (310) is not discharged to the outside by the tank check valve (CVT) and is compressed inside the flushing tank (310). Accordingly, even in this case, an air layer (A) exists in the flushing tank (310).

When the second opening/closing valve (V2) is opened by the control unit (400) as described later while the air layer (A) of the flushing tank (310) is compressed to a predetermined pressure, the flushing water stored in the flushing tank (310) can be discharged from the flushing tank (310) as illustrated in FIG. 4 due to the pressure of the air layer (A).

And, the flushing water stored in the flushing tank (310) can be introduced into the reverse osmosis filter (210), for example, the non-filtering side (211) of the reverse osmosis filter (210), through the tank outlet line (LTO) and the inlet line (LWI) to flush the non-filtering side (211).

The control unit (400) can cause water to be filtered in the filter unit (200) and supplied to the user as shown in FIG. 2.

The control unit (400) can be electrically connected to the first on-off valve (V1), the second on-off valve (V2), and the third on-off valve (V3). In addition, the control unit (400) can open the first on-off valve (V1) and the third on-off valve (V3) and close the second on-off valve (V2). Accordingly, as shown in Fig. 2, water from a water supply source, for example, raw water, can be first filtered in the pretreatment filter (220) of the filtration unit (200) through the inlet line (LWI) and then introduced into the non-filtering side (211) of the reverse osmosis filter (210) of the filtration unit (200). Water flowing into the non-filtered side (211) of the reverse osmosis filter (210) can be filtered while passing through the reverse osmosis membrane (M) of the reverse osmosis filter (210) and flow to the filtered side (212). In this way, water filtered in the reverse osmosis filter (210), i.e. purified water, can be filtered in the post-treatment filter (230) of the filtration unit (200) through the discharge line (LWO) and then discharged to the outside through a discharge member such as a cock or faucet and supplied to the user.

The control unit (400) can cause the water filtered in the reverse osmosis filter (210) of the filtration unit (200) to be stored as flushing water in the flushing tank (310) of the flushing unit (300), as shown in FIG. 3.

The control unit (400) can open the first opening/closing valve (V1) and close the second opening/closing valve (V2) and the third opening/closing valve (V3). Accordingly, as shown in FIG. 3, water from a water supply source, for example, raw water, can be first filtered in the pretreatment filter (220) of the filtration unit (200) through the intake line (LWI) and then flow into the non-filtering side (211) of the reverse osmosis filter (210) of the filtration unit (200). The water flowing into the non-filtering side (211) of the reverse osmosis filter (210) can be filtered while passing through the reverse osmosis membrane (M) of the reverse osmosis filter (210) and flow into the filtration side (212). In this way, water filtered in the reverse osmosis filter (210), i.e. purified water, can be fed into the flushing tank (310) through a portion of the water outlet line (LWO) and the tank inlet line (LTI) connected thereto and stored as flushing water.

The control unit (400) can cause flushing water to be discharged from the flushing tank (310) of the flushing unit (300) to flush the reverse osmosis filter (210), as shown in FIG. 4.

The control unit (400) can open the second opening/closing valve (V2) and close the first opening/closing valve (V1) and the third opening/closing valve (V3). In this case, the pressure of the flushing tank (310) of the flushing unit (300) becomes higher than the pressure of the drain line (LWD). Accordingly, the flushing water stored in the flushing tank (310) can flow into the reverse osmosis filter (210) through the tank outlet line (LTO) and the inlet line (LWI) connected thereto to flush the reverse osmosis filter (210). In addition, the flushing water that flushed the reverse osmosis filter (210) can be discharged to the outside through the drain line (LWD).

In this case, the non-filtering side (211) of the reverse osmosis filter (210) can be flushed with the flushing water. As a result, water with a low TDS concentration, for example, a TDS concentration similar to that of the filtration side (212), exists on the non-filtering side (211) of the reverse osmosis filter (210). In addition, even when water is not filtered in the filtration unit (200) including the reverse osmosis filter (210), the water on the filtration side (212) of the reverse osmosis filter (210) may not move to the non-filtering side (211) due to osmotic pressure.

Accordingly, the TDS concentration of water present in the filtration side (212) of the reverse osmosis filter (210) may not increase. Therefore, when the filtration of water is resumed in the filtration unit (200) including the reverse osmosis filter (210), water with a low TDS concentration may be discharged and supplied to the user even at the beginning of the filtration. Accordingly, when filtering water using the reverse osmosis filter (210), water with a high TDS concentration may not be discharged and supplied to the user at the beginning of the filtration.

Meanwhile, the domestic water that is not filtered by the reverse osmosis filter (210) of the filtration unit (200) and remains on the non-filtered side (211) of the reverse osmosis filter (210) can be discharged to the outside through the drain line (LWD) together with the flushing water when the non-filtered side (211) of the reverse osmosis filter (210) is flushed as shown in FIG. 4. That is, when filtration is performed in the reverse osmosis filter (210) as shown in FIGS. 2 and 3, the domestic water is not discharged to the outside but remains on the non-filtered side (211) of the reverse osmosis filter (210).

Accordingly, in this case, the amount of water discharged to the outside is simply equal to the amount of flushing water stored in the flushing tank (310) of the flushing unit (300). Therefore, the removal rate and recovery rate of the reverse osmosis filter (210) can be increased, and the removal rate and recovery rate of the reverse osmosis filter (210) can be controlled by adjusting the capacity of the flushing tank (310).

Second embodiment of water treatment device

Hereinafter, a second embodiment of a water treatment device according to the present invention will be described with reference to FIG. 5.

Figure 5 is a drawing showing a second embodiment of a water treatment device according to the present invention.

Here, the second embodiment of the water treatment device according to the present invention is different from the first embodiment of the water treatment device according to the present invention described with reference to FIGS. 1 to 4 in that the flushing tank (310) of the flushing unit (300) includes an elastic storage member (311) that expands when water is introduced and contracts when water is discharged.

Therefore, the following description focuses on the differentiating configurations, and the remaining configurations can be replaced with the description given with reference to FIGS. 1 to 4 above.

In the second embodiment of the water treatment device (100) according to the present invention, the flushing tank (310) of the flushing unit (300) may include a flexible storage member (311). The flexible storage member (311) may expand when water is introduced and contract when water is discharged. For example, the flexible storage member (311) may be made of a relatively elastic material such as rubber.

In this case, when the first on-off valve (V1) is opened and the second on-off valve (V2) and the third on-off valve (V3) are closed by the control unit (400), the water filtered in the reverse osmosis filter (210) of the filtration unit (200) can be introduced into the expansion storage member (311) of the flushing tank (310) of the flushing unit (300) through the tank inlet line (LTI) and stored as flushing water. Then, as the water filtered in the reverse osmosis filter (210) is stored as flushing water in the expansion storage member (311), the expansion storage member (311) can expand due to the inflow pressure of the water. Therefore, the flushing water can be stored in the expansion storage member (311) at a predetermined pressure.

In addition, when the second shut-off valve (V2) is opened and the first shut-off valve (V1) and the third shut-off valve (V3) are closed by the control unit (400), the flushing water stored in the expandable storage unit (311) can be discharged from the expandable storage unit (311) by the pressure of the flushing water stored in the expandable storage unit (311). In addition, the flushing water can be introduced into the non-filtering side (211) of the reverse osmosis filter (210) of the filtration unit (200) through the tank outlet line (LTO) and the inlet line (LWI) connected thereto, flush the non-filtering side (211), and then be discharged to the outside through the drain line (LWD).

Meanwhile, the flushing tank (310) may further include a tank housing (not shown) in which a flexible storage member (311) is provided inside in addition to the aforementioned flexible storage member (311).

In this case, the water filtered by the reverse osmosis filter (210) is stored as flushing water in the expansion storage member (311), and the water stored in the tank housing, such as raw water, is discharged to the outside, and the flushing water stored in the expansion storage member (311) is discharged as raw water, etc., is introduced into the tank housing.

Water treatment device Third embodiment

Hereinafter, a third embodiment of a water treatment device according to the present invention will be described with reference to FIG. 6.

Figure 6 is a drawing showing a third embodiment of a water treatment device according to the present invention.

Here, the third embodiment of the water treatment device according to the present invention is different from the first embodiment of the water treatment device according to the present invention described with reference to FIGS. 1 to 4 in that it further includes a storage tank (500).

Therefore, the following description focuses on the differentiating configurations, and the remaining configurations can be replaced with the description given with reference to FIGS. 1 to 4 above.

A third embodiment of a water treatment device (100) according to the present invention may further include a storage tank (500).

The storage tank (500) can be connected to the outlet line (LWO). For example, the storage tank (500) can be connected to a portion of the outlet line (LWO) after the third opening/closing valve (V3). In addition, water filtered by the filter unit (200), i.e. purified water, can be stored in the storage tank (500).

The storage tank (500) can be connected to a discharge member such as a cock or faucet by a connecting line (not shown). In addition, the discharge member can be equipped with a discharge valve (not shown). Then, when the discharge valve is opened by a control unit (400) electrically connected to the discharge valve or by a user, the filtered water, i.e., purified water, stored in the storage tank (500) can flow through the connecting line and be discharged to the outside through a discharge member such as a cock or faucet to be supplied to the user.

Water treatment device Example 4

Hereinafter, a fourth embodiment of a water treatment device according to the present invention will be described with reference to FIG. 7.

Figure 7 is a drawing showing a fourth embodiment of a water treatment device according to the present invention.

Here, the fourth embodiment of the water treatment device according to the present invention is different from the first embodiment of the water treatment device according to the present invention described with reference to FIGS. 1 to 4 in that an electrolysis unit (EL) is provided in the tank inlet line (LTI) or the tank outlet line (LTO).

Therefore, the following description focuses on the differentiating configurations, and the remaining configurations can be replaced with the description given with reference to FIGS. 1 to 4 above.

In the fourth embodiment of the water treatment device (100) according to the present invention, an electrolysis unit (EL) may be provided in the tank inlet line (LTI) or the tank outlet line (LTO). The electrolysis unit (EL) can electrolyze water to produce sterilized water. The configuration of the electrolysis unit (EL) is not particularly limited, and any known configuration can be used as long as it can electrolyze water to produce sterilized water.

When an electrolysis unit (EL) is provided in the tank inlet line (LTI), when water filtered in the reverse osmosis filter (210) of the filtration unit (200) flows into the flushing tank (310) of the flushing unit (300) through the tank inlet line (LTI) and is stored as flushing water, sterilized water can be produced by the electrolysis unit (EL).

Accordingly, the flushing water stored in the flushing tank (310) may contain at least some sterilizing water. Accordingly, the flushing tank (310) may be sterilized by the sterilizing water. In addition, when flushing the reverse osmosis filter (210), for example, the non-filtering side (211) of the reverse osmosis filter (210), by the flushing water stored in the flushing tank (310), the tank outlet line (LTO) and a part of the inlet line (LWI) connected thereto and the non-filtering side (211) of the reverse osmosis filter (210) may be sterilized by the sterilizing water contained in the flushing water.

In the case where an electrolysis unit (EL) is provided in the tank outlet line (LTO), when the flushing water stored in the flushing tank (310) of the flushing unit (300) is discharged through the tank outlet line (LTO) for flushing the reverse osmosis filter (210) of the filtration unit (200), sterilizing water can be produced by the electrolysis unit (EL).

Accordingly, the flushing water discharged through the tank outlet line (LTO) may contain at least some sterilizing water. In addition, the tank outlet line (LTO), a portion of the inlet line (LWI) connected thereto, and the non-filtering side (211) of the reverse osmosis filter (210) may be sterilized by the sterilizing water contained in the flushing water.

Meanwhile, the control unit (400) can be electrically connected to the electrolysis unit (EL). And, when the electrolysis unit (EL) is provided in the tank inlet line (LTI), the control unit (400) can operate the electrolysis unit (EL) when water flows in the tank inlet line (LTI). In addition, when the electrolysis unit (EL) is provided in the tank outlet line (LTO), the control unit (400) can operate the electrolysis unit (EL) when water flows in the tank outlet line (LTO).

Water treatment device Example 5

Hereinafter, a fifth embodiment of a water treatment device according to the present invention will be described with reference to FIG. 8.

Figure 8 is a drawing showing a fifth embodiment of a water treatment device according to the present invention.

Here, the fifth embodiment of the water treatment device according to the present invention is different from the first embodiment of the water treatment device according to the present invention described with reference to FIGS. 1 to 4 in that a sterilizing unit (312) containing a sterilizing substance (MS) is provided in the flushing tank (310) of the flushing unit (300).

Therefore, the following description focuses on the differentiating configurations, and the remaining configurations can be replaced with the description given with reference to FIGS. 1 to 4 above.

In the fifth embodiment of the water treatment device (100) according to the present invention, a sterilizing unit (312) may be provided in the flushing tank (310) of the flushing unit (300).

The sterilizing unit (312) can contain a sterilizing agent (MS). In addition, the sterilizing unit (312) can cause the sterilizing agent (MS) to dissolve in the flushing water stored in the flushing tank (310) due to the pressure of the air layer (A) of the flushing tank (310) that increases as the water filtered by the reverse osmosis filter (210) of the filtration unit (200) flows into the flushing tank (310) of the flushing unit (300) as flushing water.

Accordingly, the flushing water stored in the flushing tank (310) may contain a sterilizing substance (MS). Accordingly, the flushing tank (310) may be sterilized by the sterilizing substance (MS) contained in the flushing water. In addition, when flushing the reverse osmosis filter (210), for example, the non-filtering side (211) of the reverse osmosis filter (210), by the flushing water stored in the flushing tank (310), the tank outlet line (LTO) and a part of the inlet line (LWI) connected thereto and the non-filtering side (211) of the reverse osmosis filter (210) may be sterilized by the sterilizing substance (MS) contained in the flushing water.

The sterilizing agent (MS) may be, for example, citric acid. However, the sterilizing agent (MS) is not particularly limited, and any known sterilizing agent (MS) may be used.

The sterilization unit (312) may include a container (312a) and a pressurizing member (312b).

A container (312a) may be provided in a flushing tank (310) to contain a sterilizing substance (MS). In addition, one side of the container (312a) may be open, and an outlet (ET) through which the sterilizing substance (MS) is discharged may be formed on the other side.

The pressurizing member (312b) may be movably provided on one open side of the container (312a). In addition, the pressurizing member (312b) may pressurize the sterilizing substance (MS) contained in the container (312a) according to the pressure of the air layer (A) of the flushing tank (310) so that the sterilizing substance (MS) may be discharged through the discharge port (ET) of the container (312a). Accordingly, the sterilizing substance (MS) may be dissolved in the flushing water stored in the flushing tank (310).

As described above, by using the water treatment device according to the present invention, the reverse osmosis filter can be flushed with water filtered from the reverse osmosis filter, and when filtering water using the reverse osmosis filter, water with a high TDS concentration can be prevented from being discharged and supplied to the user at the initial stage of filtration, and the removal rate and recovery rate of the reverse osmosis filter can be increased and the removal rate and recovery rate can be controlled.

The water treatment device described above is not limited to the configuration of the embodiments described above, and the embodiments may be configured by selectively combining all or part of the embodiments so that various modifications can be made.

100 : Water treatment device 200 : Filtration unit
210: Reverse osmosis filter 211: Non-filtering side
212: Filter side 220: Pretreatment filter
230: Post-processing filter 300: Flushing unit
310: Flushing tank 311: Flexible storage member
312: Sterilization unit 312a: Container
312b: Pressurized member 400: Control unit
500 : Storage tank V1 : First opening valve
V2: Second opening valve V3: Third opening valve
CV: Check valve CVF: Flushing check valve
CVT: Tank check valve LWI: Inlet line
LWO: Outlet line LWD: Drainage line
LTI: Tank inlet line LTO: Tank outlet line
M: reverse osmosis membrane A: air layer
ET: exhaust outlet EL: electrolysis unit
MS: Sterilizing agent

Claims (19)

A filtration unit including a reverse osmosis filter that filters water supplied from a water supply source;
A flushing unit including a flushing tank in which water filtered from the reverse osmosis filter is stored and discharged as flushing water; and
A control unit for allowing water to be filtered in the filter unit and supplied to a user, allowing water filtered in the reverse osmosis filter to be stored in the flushing tank as flushing water, or allowing flushing water to be discharged from the flushing tank to flush the reverse osmosis filter;
Including,
The above reverse osmosis filter is divided into a non-filtration side and a filtration side by a reverse osmosis membrane.
The non-filtering side of the above reverse osmosis filter is flushed with flushing water,
There is always an air layer in the above flushing tank,
A water treatment device in which the above flushing tank is equipped with a tank check valve to prevent air from being discharged to the outside when storing filtered water. delete delete A water treatment device in which, in the first paragraph, an inlet line for allowing water to flow into the reverse osmosis filter and a drain line for discharging flushing water that flushes the non-filtered side are connected to the non-filtered side, and an outlet line for discharging water that has passed through the reverse osmosis membrane is connected to the filtered side. In the fourth paragraph, a water treatment device in which a tank inlet line connected to the outlet line and a tank outlet line connected to the inlet line are connected to the flushing tank. A water treatment device in accordance with claim 5, wherein a first opening/closing valve is provided in the inlet line before the point where the tank outlet line is connected, a second opening/closing valve is provided in the drain line, and a third opening/closing valve is provided in the outlet line after the point where the tank inlet line is connected. In the sixth paragraph, the control unit is a water treatment device that opens the first and third opening/closing valves and closes the second opening/closing valve so that water is filtered in the filter unit and discharged to the outside. In the sixth paragraph, the control unit is a water treatment device that opens the first opening/closing valve and closes the second opening/closing valve and the third opening/closing valve so that water filtered in the reverse osmosis filter is stored in the flushing tank as flushing water. In the sixth paragraph, the control unit is a water treatment device that opens the second opening/closing valve and closes the first opening/closing valve and the third opening/closing valve so that flushing water is discharged from the flushing tank to flush the reverse osmosis filter. A water treatment device in accordance with claim 5, wherein a check valve is provided in a portion of the outlet line between the filtration side and the tank inlet line to allow water to flow only in the direction of the outlet line from the filtration side. In the fifth paragraph, a water treatment device in which a flushing check valve is provided in the tank outlet line to allow water to flow only in the direction of the inlet line from the flushing tank. In the fifth paragraph, a water treatment device having an electrolysis unit for producing sterilized water by electrolyzing water in the tank inlet line or the tank outlet line. In the 12th paragraph, the control unit is a water treatment device that operates the electrolysis unit when water flows in the tank inlet line or the tank outlet line. delete delete In the first paragraph, the flushing tank is equipped with a sterilizing unit containing a sterilizing substance,
The above sterilizing unit is a water treatment device that causes the sterilizing agent to dissolve in the flushing water stored in the flushing tank due to the pressure of the air layer that increases as the filtered water flows into the flushing tank as flushing water. In the 16th paragraph, the sterilizing unit is a water treatment device including a container provided in the flushing tank to contain the sterilizing substance, one side of which is open and the other side of which has a discharge port through which the sterilizing substance is discharged, and a pressurizing member movably provided on the open side of the container to pressurize the sterilizing substance according to the pressure of the air layer so that the sterilizing substance is discharged through the discharge port. In the first paragraph, the flushing tank is a water treatment device including an elastic storage member that expands when water is introduced and contracts when water is discharged. A water treatment device further comprising: a storage tank connected to the outlet line and storing water filtered in the filter unit in the fourth paragraph.

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