KR101331842B1 - Sterilizing method for water tank of water purifier and sterilizing water purifier applied thereof - Google Patents

Abstract

The present invention relates to a method for sterilizing a water purifier storage tank capable of sterilizing a water storage tank of a water purifier while minimizing the structure change of a conventional water purifier, and a sterilizing water purifier using the same. A filter unit having a membrane filter having an inlet portion, an outlet portion through which the filtered water flows out, and a removal water drain portion through which removal water flows out; A sterilization module for selectively generating a sterilization liquid by using the filtered water flowing out to the outlet; And a water storage tank in which water passing through the sterilization module is stored, wherein the water in the sterilization liquid or the water storage tank generated by the sterilization module and supplied into the water storage tank is drained through the removal water drain portion. Can be.

Description

Sterilizing method for water tank of water purifier and sterilizing water purifier applied etc}

The present invention relates to a method for sterilizing a water purifier storage tank and a sterilizing water purifier using the same, and more particularly, to a method for sterilizing a water purifier storage tank capable of sterilizing a water storage tank of a water purifier while minimizing the structure change of an existing water purifier. Relates to a sterile water purifier.

In general, a water purifier refers to an apparatus for purifying water in a state suitable for drinking raw water supplied from a water supply or the like. On the other hand, in recent years, a water purifier of the type that filters the raw water by the filter unit and discharges the water stored in the reservoir tank as needed to drink the mainstream.

The water stored in the water storage tank provided in the water purifier is already filtered water through the filter unit, but even if a very small amount of bacteria and the like remaining in the filtered water, bacteria can multiply rapidly and contaminate the water inside the water storage tank.

Therefore, in the past, professional water purifiers had to frequently visit places where water purifiers were installed in order to clean and sterilize the inside of water purifier tanks, but there is a problem of excessive management costs for water purifier manufacturers and equipment companies.

In order to solve this problem, a sterilizing water purifier capable of automatically sterilizing the water storage tank of the water purifier through the process of injecting and draining chlorine oxide into the water storage tank has been developed. However, this sterilizing water purifier has a problem in that the manufacturing cost increases significantly because a separate drain pump must be installed in order to drain the water inside the reservoir tank.

Therefore, the two methods described above for sterilizing the water storage tank of the water purifier have a limitation in that a high cost is required.

The present invention has been conceived to solve the above problems, and an object of the present invention is to provide a sterilization method of a water purifier storage tank capable of sterilizing a water storage tank of a water purifier while minimizing the structure change of an existing water purifier and a sterilizing water purifier using the same. .

It is another object of the present invention to provide a sterilization method of a water purifier storage tank having a structure that sterilizes a water storage tank in a water purifier with a minimum cost increase, and a sterilizing water purifier using the same.

In order to achieve the above object, the sterilizing water purifier according to the preferred embodiment of the present invention is a membrane filter which is formed with an inlet through which water is introduced, an outlet through which filtered water flows out, and a removal water drain through which removal water flows out. It is provided with a filter unit for purifying water; A sterilization module for selectively generating a sterilization liquid by using the filtered water flowing out to the outlet; And a water storage tank in which water passing through the sterilization module is stored, wherein the water in the sterilization liquid or the water storage tank generated by the sterilization module and supplied into the water storage tank is drained through the removal water drain portion. Can be.

In addition, the sterilizing water purifier further includes a boosting pump on the inlet side to increase the pressure of the water flowing through the inlet.

Preferably, the sterilizing water purifier further includes an auto flushing valve installed in the removal water drain.

On the other hand, the liquid inside the reservoir tank may be drained through the removal water drain through the sterilization module.

The sterilizing water purifier may further include a drain pipe connecting an upstream side of the storage tank and the boosting pump and draining the liquid inside the storage tank in a direction from the storage tank toward the boosting pump.

The drain pipe also includes a check valve for flowing liquid only in the direction from the reservoir tank toward the boost pump.

The liquid in the storage tank may be discharged through the drain pipe, the boost pump, and the removal water drain in order.

On the other hand, the water storage tank is composed of a plurality, the sterilizing water purifier connects each of the water storage tank and the upstream side of the boosting pump and the liquid inside each water storage tank in the direction from the respective water storage tank to the boosting pump Further provided with a drain pipe for draining.

Preferably, the drain pipes each have a drain valve.

More preferably, the liquid in each of the reservoir tanks is sequentially discharged in the direction toward the boost pump by the respective drain valves.

Meanwhile, the liquid in the storage tank may be discharged through the drain pipes, the boosting pump, and the removal water drain in sequence.

In addition, in order to achieve the above object, the sterilization method of the water purifier reservoir tank according to a preferred embodiment of the present invention includes a first drainage step of draining the water inside the reservoir tank through the removal water drain formed on the filter portion; Selectively generating a sterilizing liquid using water filtered by the filter unit; Supplying the sterilization liquid into the reservoir tank to sterilize the reservoir tank; And a second drainage step of draining the sterilizing liquid inside the reservoir tank through the removal water drain formed on the filter part.

The first draining step or the second draining step may include: After the liquid in the storage tank passes the sterilization module for generating the sterilizing solution, the liquid may be drained through the removal water drain.

In addition, the first drainage step or the second drainage step: the liquid in the reservoir tank is located on the upstream side of the filter portion after passing through the booster pump located in the upstream side of the filter portion and the reservoir tank After passing through the boost pump, it may be drained through the removal water drain.

On the other hand, the reservoir tank is composed of a plurality of having a respective drain pipe, the liquid inside each reservoir tank may pass through the drain pipe provided for each reservoir tank sequentially.

The present invention has the following effects.

First, it is possible to provide a sterilization method of a water purifier storage tank capable of sterilizing a water storage tank of a water purifier while minimizing the structure change of the existing water purifier and a sterilizing water purifier using the same.

Second, it is possible to provide a sterilization method of a water purifier storage tank and a sterilizing water purifier applying the same while employing a structure for sterilizing the water storage tank in the water purifier while minimizing the cost increase.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate preferred embodiments of the invention and, together with the description of the invention given above, serve to further the understanding of the technical idea of the invention, And should not be construed as interpretation.
1 is a conceptual diagram showing the configuration of a sterile water purifier according to a first embodiment of the present invention.
2 is a conceptual diagram showing the configuration of the sterilizing water purifier according to the second embodiment of the present invention.
3 is a conceptual diagram showing the configuration of the sterilizing water purifier according to the third embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings will be described in detail the sterilization method of the water purifier reservoir tank and the sterilization water purifier applying the same according to a preferred embodiment of the present invention.

The terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms and the inventor may appropriately define the concept of the term in order to best describe its invention It should be construed as meaning and concept consistent with the technical idea of the present invention. Therefore, the embodiments described in the specification and the drawings shown in the drawings are only the most preferred embodiment of the present invention and do not represent all of the technical idea of the present invention, various modifications that can be replaced at the time of the present application It should be understood that there may be equivalents and variations.

In the drawings, the size of each component or a specific portion constituting the components is exaggerated, omitted, or schematically illustrated for convenience and clarity of description. Thus, the size of each component does not entirely reflect its actual size. If it is determined that detailed descriptions of related known functions or configurations may unnecessarily obscure the subject matter of the present invention, such descriptions will be omitted.

<First Example >

1 is a conceptual diagram showing the configuration of a sterile water purifier according to a first embodiment of the present invention.

Referring to FIG. 1, the sterilizing water purifier according to the first embodiment of the present invention includes a filter such as a membrane filter 16 and filters the sterilizing liquid by using a filter unit for purifying water and water filtered by the filter unit. It is essentially provided with a sterilization module 6 to be produced and a reservoir tank 8 in which water passing through the sterilization module 6 is stored.

In addition, the sterilizing water purifier according to the present invention may further include a discharge nozzle for discharging purified water, a heating member for heating the purified water for producing hot water, and a cooling member for heating the purified water for producing cold water. Meanwhile, in the case of the water purifier capable of discharging ice, the ice maker may further include an ice maker for manufacturing ice, and the ice maker may serve as a cooling member to manufacture both ice and cold water.

The filter unit is essentially provided with a membrane filter 16, and additionally, a precipitating filter 12 for filtering suspended matters contained in raw water applied from a water source such as tap water, and a conventional filter such as a carbon filter. It may consist of. Here, the carbon filter may be used alone, or a plurality of carbon filters may be used, such as the sun carbon filter 14 and the fucarbon filter 18.

The membrane filter 16 has an inlet 16a through which water is introduced and an outlet 16b through which filtered water flows out, like other filters such as the precipitation filter 12 and carbon filters. Otherwise, a removal water drain portion through which the contaminant-concentrated removal water is drawn out is formed. This removal water drain is shown in the figure as being formed at the lower end of the membrane filter.

The membrane filter 16 removes contaminants through the micropores of the membrane therein. The contaminant is filtered by pressing one side of the membrane at a predetermined pressure and pushing water to the opposite side of the membrane.

Therefore, in the water purifier using the membrane filter 16 in which filtration is performed on the principle as mentioned above, the apparatus which can adjust the water pressure of a membrane surface is needed. As a method of controlling the hydrostatic pressure on the membrane, an auto flushing valve 30 having a small inner diameter orifice may be installed in the removal water drain portion of the membrane filter 16.

In addition, since only the water pressure of the tap water itself may not generate sufficient pressure to filter the raw water in the membrane filter 16, the inflow is performed to increase the pressure of the water to be supplied to the inlet portion 16a of the membrane filter 16. It is preferable that the boosting pump 4 is provided in the part 16a side.

Hereinafter, to describe the configuration of the sterilizing water purifier according to the first embodiment of the present invention according to the flow of the purified water.

The sterilizing water purifier according to the first embodiment of the present invention is a sedimentation filter 12 which receives raw water from a water source 2 such as tap water, and a raw water solenoid valve that blocks or permits the progress of water passing through the sedimentation filter 12 ( 3) a boosting pump 4 located on the downstream side of the raw water solenoid valve 3 for raising the pressure of water, a sun carbon filter 14 for filtering water passing through the boosting pump 4, and The membrane filter 16 which filters the water from the sun carbon filter 14, the fucarbon filter 18 which filters the water from the said membrane filter 16, and the water from the fucarbon filter 18 It is provided with a sterilization module (6) for selectively generating a sterilization liquid as needed, and a reservoir tank (8) for storing water passing through the sterilization module (6).

In order to sterilize the inside of the reservoir tank 8, first, the water stored in the reservoir tank 8 must be drained (first drainage step), and a sterilization liquid can be selectively generated using the sterilization module 6 (sterilization). Liquid generation step), after supplying the sterilization liquid to the inside of the storage tank 8 to sterilize the storage tank 8 (storage tank sterilization step), draining the sterilization liquid in the storage tank 8 (second drainage Step).

In the first draining step, the water in the reservoir tank 8 is drained through the removal water drain of the membrane filter 16 among the filter parts. At this stage, the raw water solenoid valve 3 and the boosting pump 4 are in an OFF state, and the water inside the reservoir tank 8 passes through the sterilization module 6 which produces a sterilizing liquid, and then the removal water drain portion Drained through. That is, the water is drained in the reverse direction to the direction in which the water is purified. Here, it is preferable to turn ON the auto flushing valve 30 provided in the removal water drain so that water can be discharged quickly.

When the drainage of the water stored in the reservoir tank 8 is completed in the first drainage step, a step of generating a sterilizing solution using water filtered by the filter unit is performed. Typically, since the sterilization module 6 is in the OFF state when the purified water is performed, raw water simply passes through the flow path in the filter part and the sterilization module 6 and is stored in the purified water tank. In the ON state of the water passes through the sterilization module (6). When the raw water solenoid valve 3 operates the boosting pump 4 while the raw water solenoid valve 3 is turned on and passes through the sterilization module 6 in which the water is turned on, the sterilizing liquid is discharged by electrolysis or chloride. Is generated. In this case, in order to increase the efficiency of generating the sterilizing liquid, it is preferable to reduce the amount of water flowing out to the auto flushing valve 30, and for this purpose, the auto flushing valve 30 is left in an OFF state.

Thereafter, the sterilization liquid thus produced is supplied into the storage tank 8 to perform a storage tank sterilization step of sterilizing the storage tank 8.

Next, a second drainage step is performed, in which the raw water solenoid valve 3 and the boost pump 4 are in an OFF state, and the sterilizing liquid in the reservoir tank 8 is in a state where the sterilization module 6 is in the OFF state. At which is passed through the sterilization module (6) and then drained through the removal water drain of the membrane filter (16). Of course, it is preferable to turn on the auto flushing valve 30 provided in the removal water drain portion so that the water can be discharged quickly as in the first drainage step.

According to the sterilization method of the sterilizing water purifier and the water purifier storage tank 8 according to the first embodiment of the present invention described above, since it is not necessary to install a separate drain pump for draining the water inside the water storage tank 8, There is an advantage that the manufacturing cost does not rise. In addition, there is an advantage to sterilize the reservoir tank 8 of the water purifier while minimizing the structure change of the existing water purifier.

<2nd Example >

FIG. 2 is a conceptual diagram illustrating a configuration of a sterilizing water purifier according to a second embodiment of the present invention, and a second embodiment of the present invention will be described with reference to FIG. 2. In addition, in description of 2nd Example, the description which abbreviate | omits the part which is common to 1st Embodiment is abbreviate | omitted, and focuses only on the part which differs from 1st Embodiment.

The second embodiment shares most of the configuration with the first embodiment, except that a drain pipe for draining the water inside the water storage tank 8 in a direction from the water storage tank 8 toward the boost pump 4 is provided. The difference only differs in that it further includes (20). Here, the drain pipe 20 connects the water storage tank 8 and the upstream side of the boost pump 4.

In addition, since the drain pipe 20 only serves to discharge the water in the storage tank 8, the water passing through the precipitation filter 12 flows directly into the purified water tank through the drain pipe 20 without passing through the remaining filters. It needs to be prevented. Thus, the drain pipe 20 is provided with a drain valve 22 that permits only the flow of liquid from the reservoir tank 8 toward the boost pump 4.

In addition, the second embodiment is the first drainage step, sterilization liquid generation step, the storage tank sterilization step, the sterilization liquid generation step and the storage tank sterilization step of the second drainage step is the same as the first embodiment, The second drainage step differs from the first embodiment.

That is, in the first draining step, the water in the reservoir tank 8 is drained through the removal water drain part of the membrane filter 16 among the filter parts. At this stage, the water inside the reservoir tank (8) passes through the drainage pipe (20), and then through the boosting pump (4) located upstream of the membrane filter (16), and then through the removal water drain section to drain the water. do. The raw water solenoid valve 3 is turned OFF, and the boost pump 4 is operated to forcibly drain the water in the reservoir tank. Here, it is preferable to turn ON the auto flushing valve 30 provided in the removal water drain so that water can be discharged quickly.

When the drainage of the water stored in the reservoir tank 8 is completed in the first drainage step, a step of generating a sterilizing solution using water filtered by the filter unit is performed. When the raw water solenoid valve 3 operates the boosting pump 4 in the ON state and the water passes through the sterilization module 6 in the ON state, the sterilizing liquid is generated. In this case, in order to increase the efficiency of generating the sterilizing liquid, it is preferable to reduce the amount of water flowing out to the auto flushing valve 30, and for this purpose, the auto flushing valve 30 is left in an OFF state.

In addition, since a drain valve 22 that is a check valve that allows water to flow only in the drainage direction is formed in the drain pipe 20, a phenomenon in which water passing through the precipitation filter 12 directly flows into the water purification tank is prevented.

Thereafter, the sterilization liquid thus produced is supplied to the inside of the storage tank 8 to perform a storage tank sterilization step of sterilizing the storage tank 8.

Next, a second drainage step is performed, in which the water inside the reservoir tank 8 passes through the drainage pipe 20 and then through a boost pump 4 located upstream of the membrane filter 16. The water is then drained through the removal water drain. The raw water solenoid valve 3 is turned OFF, and the boost pump 4 is operated to forcibly drain the water in the reservoir tank. Of course, it is preferable to turn ON the auto flushing valve 30 provided in the removal water drain so that water can be discharged quickly.

According to the sterilization method of the sterilizing water purifier and the water purifier storage tank 8 according to the second embodiment of the present invention described above, since it is not necessary to install a separate drain pump for draining the water in the water storage tank 8, There is an advantage that the manufacturing cost does not rise. In addition, there is an advantage to sterilize the reservoir tank 8 of the water purifier while minimizing the structure change of the existing water purifier.

Although the second embodiment further includes a drain valve 22 and a drain pipe 20 more than the first embodiment, the configuration is further added, but the drainage speed of the water storage tank 8 is faster than that of the first embodiment. There is an advantage that the time required to sterilize the reservoir tank 8 is saved.

<Third Example >

3 is a conceptual diagram showing the configuration of a sterilizing water purifier according to a third embodiment of the present invention, and a third embodiment of the present invention will be described with reference to FIG. 3. In addition, in description of 3rd Embodiment, the description which abbreviate | omits the part which is common to 2nd Embodiment is abbreviate | omitted, and focuses only on the part which differs from 2nd Embodiment.

In the third embodiment, most of the configuration is shared with the second embodiment, except that the storage tanks 8 are plural instead of one, and each of the storage tanks 8 includes a drain pipe for draining the liquid therein. There is a difference in that it has 20). In other words, there are a plurality of reservoir tanks 8a and 8b, and each of the reservoir tanks 8 is provided with drainage pipes 20a and 20b, respectively, so that the drainage pipe 20 is connected to the respective reservoir tank 8 and the boost pump ( The upstream side of 4) is connected. In addition, each of the drain pipes 20a and 20b has drain valves 22a and 22b, respectively. And unlike the second embodiment, it is preferable that the drain valves 22a and 22b use solenoid valves instead of check valves, respectively.

In addition, the third embodiment is the first drainage step, the sterilization liquid generation step, the storage tank sterilization step, the sterilization liquid generation step and the storage tank sterilization step of the second drainage step is the same as the second embodiment, The second drainage step is different from the second embodiment.

That is, in the first draining step, the water in the reservoir tank 8 is drained through the removal water drain part of the membrane filter 16 among the filter parts. At this stage, the water inside the reservoir tank (8) passes through the drainage pipe (20), and then through the boosting pump (4) located upstream of the membrane filter (16), and then through the removal water drain section to drain the water. do. The raw water solenoid valve 3 is turned off, the drain valves 22a and 22b are turned on, and the boost pump 4 is operated to forcibly drain the water in the reservoir tank. Here, it is preferable to turn ON the auto flushing valve 30 provided in the removal water drain so that water can be discharged quickly.

If the drain valve 22a and the drain valve 22b are turned on at the same time to open the valve to simultaneously drain the water in the reservoir tank 8a and the reservoir tank 8b, the reservoir tank 8a and the reservoir tank are opened. The water in the reservoir tank of any one of (8b) will first be drained off. In this case, since air may be introduced into the drainage path from the drainage reservoir, the purified water in the reservoir tank is not easily drained. Therefore, it is preferable to discharge the water inside the plurality of reservoir tanks 8 separately, instead of simultaneously discharging the water inside the plurality of reservoir tanks 8. For this purpose, it is preferable to control the drain valves 22a and 22b individually and sequentially.

When the drainage of the water stored in the reservoir tank 8 is completed in the first drainage step, a step of generating a sterilizing solution using water filtered by the filter unit is performed. When the raw water solenoid valve 3 operates the boosting pump 4 in the ON state and the water passes through the sterilization module 6 in the ON state, the sterilizing liquid is generated. In this case, in order to increase the efficiency of generating the sterilizing liquid, it is preferable to reduce the amount of water flowing out to the auto flushing valve 30, and for this purpose, the auto flushing valve 30 is left in an OFF state.

In addition, by controlling the drain valves 22a and 22b installed in each of the drain pipes 20 to be in an OFF state, a phenomenon in which water passing through the precipitation filter 12 directly flows into the water purification tank is prevented.

In addition, in order to increase the efficiency of generating the sterilizing liquid in the step of generating the sterilizing liquid, it is preferable to reduce the amount of water exiting to the auto flushing valve 30, for this purpose, the auto flushing valve 30 is left in the OFF state. .

Thereafter, the sterilization liquid thus generated is supplied to the inside of the storage tank 8 to perform a storage tank sterilization step of sterilizing the storage tank 8.

Next, a second drainage step is performed, in which the sterilizing liquid inside the reservoir tank 8 passes through the drainage pipe 20 and then through the boosting pump 4 located upstream of the filter part. Drain through the removal water drain. The raw water solenoid valve 3 is turned off, the drain valves 22a and 22b are turned on, and the boost pump 4 is operated to forcibly drain the water in the reservoir tank. Like the above first draining step, the second draining step may also separately and sequentially release drain valves 22a and 22b to prevent the air from flowing into the drainage path from the drained reservoir tank side. It is desirable to control. Of course, it is preferable to turn ON the auto flushing valve 30 provided in the removal water drain so that water can be discharged quickly.

According to the sterilization method of the sterilizing water purifier and the water purifier water storage tank 8 according to the third embodiment of the present invention described above, since it is not necessary to install a separate drain pump for draining the water inside the water storage tank 8, There is an advantage that the manufacturing cost does not rise. In addition, there is an advantage to sterilize the reservoir tank 8 of the water purifier while minimizing the structure change of the existing water purifier.

Compared to the second embodiment, the present third embodiment still holds the storage tank 8 by controlling the drain valves 22a and 22b separately and sequentially, even when there are a plurality of the storage tanks 8. It can be seen that the water in the inside) can be smoothly discharged, and the time required for sterilizing the reservoir tank 8 is saved as compared with the first embodiment as in the second embodiment.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not to be limited to the details thereof and that various changes and modifications will be apparent to those skilled in the art. And various modifications and variations are possible within the scope of the appended claims.

2: source of water 3: source of water solenoid valve
4: boosting pump 6: sterilization module
8, 8a, 8b: reservoir tank 12: sedimentation filter
14: sun carbon filter 16: membrane filter
16a: inlet 16b: outlet
18: fucarbon filter 20, 20a, 20b: drain pipe
22, 22a, 22b: drain valve 30: auto flushing valve

Claims (15)

A filter unit including a membrane filter having an inlet part through which water is introduced, an outlet part through which filtered water flows out, and a removal water drain part through which removal water condensed with contaminants flows out;
A reservoir tank for storing water passing through the filter unit; And
It is installed between the filter unit and the water storage tank, and in the driving state to generate the sterilization liquid using the water passed through the filter unit, the sterilization liquid is transferred to the water storage tank, and in the stationary state water passing through the filter unit It is provided with a sterilization module for delivering to the reservoir as it is;
The sterilizing water purifier, characterized in that generated by the sterilization module and supplied to the inside of the reservoir tank or water in the reservoir tank can be drained through the removal water drain. The method of claim 1,
Sterilizing water purifier, characterized in that it further comprises a boosting pump provided on the inlet side to increase the pressure of the water flowing through the inlet. The method of claim 1,
A sterilizing water purifier, further comprising an auto flushing valve installed in the removal water drain. The method of claim 1,
Sterilizing water purifier, characterized in that the liquid in the reservoir tank can be drained through the removal water drain through the sterilization module. 3. The method of claim 2,
A sterilizing water purifier, further comprising: a drain pipe connecting the upstream side of the water storage tank and the boosting pump and draining the liquid inside the water storage tank in a direction from the water storage tank to the boosting pump. The method of claim 5,
The drain pipe has a check valve for flowing a liquid only in a direction from the reservoir tank toward the boost pump. The method of claim 5,
The liquid in the reservoir tank can be discharged through the drain pipe, the boosting pump and the removal water drain in sequence. 3. The method of claim 2,
The reservoir tank consists of a plurality,
A sterilizing water purifier, further comprising drain pipes connecting the respective upstream sides of each of the storage tanks and the boosting pump and draining the liquid inside each of the storage tanks in a direction from the respective storage tanks toward the boosting pump. 9. The method of claim 8,
And said drain pipes each have a drain valve. 10. The method of claim 9,
Sterilizing water purifier, characterized in that the liquid in each of the reservoir tank is sequentially discharged in the direction toward the boost pump by the respective drain valve. 9. The method of claim 8,
Sterilizing water purifier, characterized in that the liquid in the reservoir tank can be discharged through the drain pipes, the boosting pump and the removal water drain in sequence. It has a membrane filter is provided with a drain water drain portion for draining the removal water concentrated contaminants, the filter unit for filtering water, the reservoir tank for storing the water passing through the filter unit, and is installed between the filter unit and the reservoir tank In the sterilization method of the water purifier storage tank comprising a sterilization module,
In the state in which the sterilization module is stopped, the sterilization module is a water supply step of supplying to the reservoir tank by passing the water in the filter unit as it is;
A first drainage step of draining the water inside the reservoir tank through the removal water drainage portion formed in the filter portion;
Generating a sterilizing liquid by using the water filtered by the filter unit in the sterilizing module while the sterilizing module is driven;
Supplying the sterilization liquid into the reservoir tank to sterilize the reservoir tank; And
And a second drainage step of draining the sterilizing liquid in the storage tank through the removal water drain formed in the filter part. The method of claim 12,
The first drainage step or the second drainage step is:
The liquid in the water storage tank is passed through the sterilization module for generating the sterilization liquid, and then the water is passed through the drainage drain portion, the sterilization method of the water purifier storage tank, characterized in that the drainage. The method of claim 12,
The first drainage step or the second drainage step is:
After passing through the booster pump located at the upstream side of the filter unit and the drain pipe connecting the reservoir tank, the liquid inside the reservoir tank passes through the booster pump located upstream of the filter unit and then passes through the removal water drain unit. Sterilization method of water purifier reservoir tank, characterized in that the drainage. 15. The method of claim 14,
The reservoir tank is composed of a plurality of having a respective drain pipe,
The liquid in each water storage tank sequentially passes through a drain pipe provided for each water storage tank.

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