KR20170016685A - Drinking water supplying device and method for controlling the same - Google Patents

Abstract

The present invention provides a drinking water supplying apparatus, including: a first passage which comprises a first valve opening and closing a passage, and guides drinking water; an outflow water passage connected to a rear of the first passage in order to discharge the drinking water; a connection pipe connecting the first passage and the outflow water passage; a second passage which supplies minerals toward the connection pipe, and comprises a second valve opening and closing the passage; a mineral container which is connected to the connection pipe through the second passage, and accommodates condensed minerals, while being arranged in front of the second valve; a pump providing compressed air pressurizing the inside of the mineral container, in order to discharge the concentrated mineral out of the mineral container; a third passage guiding the compressed air generated in the pump to the mineral container, by connecting the pump and the mineral container; a third valve releasing pressure in the third passage selectively, while being comprised in the third passage; and a control part controlling the third valve so that the third valve releases the pressure of the third passage. The drinking water supplying apparatus can prevent leakage of the minerals to the outside of the mineral container when the mineral container is replaced.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a drinking water supply device,

The present invention relates to a drinking water supply device capable of providing mineral water and a control method thereof, and more particularly, to a drinking water supply device capable of preventing minerals from splashing when a mineral container is inserted and removed into drinking water, and a control method thereof will be.

Generally, a drinking water supply device is a device for supplying drinking water to a user. Such a drinking water supply device may be a stand-alone device, and it may be a part of a household appliance such as a refrigerator.

The drinking water supply device can not only supply the drinking water at normal temperature but also cool the drinking water flowing in the drinking water supply device using a cold water supply device including a refrigeration cycle or heat the drinking water with a heater, .

The drinking water may be raw water supplied from ground water or water, and raw water fed with water can be filtered by another filtering means. However, the drinking water described below is not limited to the kind of water mentioned in the meaning of drinking water.

Recently, the drinking water supply device is intended not only to provide the user with filtered purified water, cold water, or hot water, but also to provide a function number that meets various needs of the user. For example, a drinking water supply device with a mineral water supply module may be provided to provide the user with mineral water containing a predetermined amount of mineral.

Minerals are one of the five essential nutrients along with protein, fat, carbohydrates and vitamins. They are known to play an important role in biochemical (catalytic) action, bone and tooth composition in the human body.

In particular, trace elements such as calcium (Ca), potassium (K), magnesium (Mg), and sodium (Na) are sufficient, but they can be considered essential minerals for metabolism.

Mineral water containing these minerals can play a supporting role in promoting health such as discharging waste accumulated in the body and promoting digestion.

And when a certain amount of mineral is contained in the drinking water, the user can feel an improved water taste in drinking.

In order to generate such a mineral water, an electrolytic apparatus, a mineral filter, or a mineral water container in which concentrated mineral is accommodated, and a mineral water supply module that directly supplies liquid mineral to the water through a mineral water pipe may be applied to the drinking water supply apparatus.

Mineral water supply module can be implemented in a compact size as compared with other devices and has an advantage of controlling the amount of mineral outflow for generating mineral water.

The mineral container may be formed in a size and shape that is easy to mount on the drinking water supply device. The mineral container may contain a predetermined amount of minerals corresponding to the number of times of the set mineral discharge or the reference mineral water production amount for generating mineral water.

In order to supply such mineral water, a pump for applying compressed air to the mineral vessel is used. Due to the increased pressure by the pump, problems such as splashing of minerals occur when the mineral vessel is replaced.

The present invention provides a drinking water supply device and a control method thereof, which can prevent minerals from flowing out to the outside when replacing mineral containers.

In order to accomplish the above object, the present invention provides a water treatment system comprising a first valve for opening and closing a flow path, a first flow path for guiding drinking water, An outflow channel connected to a rear end of the first flow path for discharging the drinking water; A second flow path provided with a second valve for supplying minerals toward the connection pipe and opening and closing the flow path; A mineral container connected to the connection pipe through the second flow path and disposed at a front end of the second valve to receive concentrated mineral; A pump for supplying compressed air to pressurize the inside of the mineral container to discharge the concentrated mineral to the outside of the mineral container; A third flow path connecting the pump and the mineral vessel to guide the compressed air generated in the pump to the mineral vessel; A third valve provided in the third flow path for selectively releasing the pressure in the third flow path; And a controller for controlling the third valve to release the pressure of the third flow path in the third valve.

Wherein the control unit controls the third valve to communicate the third flow path to the outside so that the pressure of the third flow path is reduced to a predetermined value when the mineral vessel is detached from the input unit, Can be released.

The control unit can operate the third valve after stopping the driving of the pump.

When receiving the input of the mineral container from the input unit, the control unit can seal the third flow path from the third valve.

The control unit can drive the pump after the third valve seals the third flow path.

When the minerals container is detached from the input unit, the control unit can seal the second flow path from the second valve.

The present invention also provides a method for mixing minerals and minerals, the method comprising: inputting a long desorption signal of a mineral container for supplying concentrated minerals to be mixed with drinking water; And a third flow path connecting the pump and the mineral container to the outside when the signal indicating that the mineral container is desorbed is connected to the mineral container to turn off the pump for applying pressure by the compressed air, And opening a flow path of the third valve for releasing the pressure of the third flow path.

Closing the flow path of the third valve and sealing the third flow path from the outside when a signal indicating that the mineral container is installed is further included.

It is possible to turn on the pump after the flow path of the third valve is closed.

And sealing the flow passage in the second valve disposed on the flow passage discharged from the mineral vessel when the signal indicating that the mineral vessel is inserted and removed is further included.

According to the present invention, since the pressure applied to the mineral vessel is released when the mineral vessel is exchanged, the minerals contained in the mineral vessel can be prevented from being splashed by the high pressure.

1 is an external perspective view of a drinking water supply apparatus according to an embodiment of the present invention;
2 is a conceptual view showing a structure and piping of a drinking water supply device according to an embodiment of the present invention;
Figure 3 schematically illustrates a configuration of a mineral supply module according to one embodiment of the present invention.
Figures 4 and 5 are control flow diagrams in accordance with an embodiment of the present invention.

Hereinafter, a drinking water supply apparatus according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

The same or corresponding components are denoted by the same reference numerals regardless of the reference numerals, and redundant description thereof will be omitted. For convenience of explanation, the size and the shape of each constituent member shown may be exaggerated or reduced.

Hereinafter, in defining the term, water before passing through the filter section is referred to as raw water, raw water filtered through the filter is referred to as a constant, and raw water or an integer containing minerals is defined as mineral water. In addition, both the raw water and the water constant can be defined as "drinking water" which indicates water that the user can drink.

Further, the front end and the rear end may refer to the upstream side and the downstream side with respect to the forward flow direction of the fluid. In this case, the forward flow direction refers to a direction in which the drinking water flows in the drinking water supply apparatus during the discharge of the drinking water out of the drinking water supply apparatus.

1 is an external perspective view of a drinking water supply apparatus according to an embodiment of the present invention.

1, the drinking water supply apparatus 1 includes a cabinet 2 and a dispenser 3 forming an external shape, and the dispenser 3 means a space in which a user is supplied with drinking water. Accordingly, the dispenser 3 is generally formed in front of the cabinet 2. [

The dispenser 3 is provided with a cock 73 through which drinking water is discharged, and a lever 4 for manipulating discharge of drinking water may be provided. The lever 4 may be provided in a form in which it is pushed or pulled by a user.

The user can push or pull the lever 4. For example, the user may push or push the lever in a state where the cup C is disposed below the cock 73, so that the drinking water discharged from the cock 73 can be contained in the cup C.

At this time, the drinking water supply device 1 can be driven in a real-time control mode. In the real time control mode, the drinking water supply device 1 can be controlled so that the drinking water is discharged through the cock 73 based on a time when the user pushes or pulls the lever.

That is, when the user operates the lever, the drinking water supply device 1 can be driven in the real time control mode.

On the other hand, the drinking water supply device 1 may further include a mineral supply module (see FIGS. 2 and 3) for supplying minerals to the drinking water discharged from the drinking water supply device 1.

That is, through the mineral supply module, the user can receive the mineral water containing the minerals from the drinking water supply device 1 in the drinking water.

At this time, the drinking water supply device 1 may further include a display type input unit 6 that informs the replacement time of the mineral container provided in the mineral water supply module and the like and allows the user to input various commands. The input unit 6 may provide information related to the drinking water supply device to the user.

Further, the user can control the drinking water supply device through the input unit 6.

In the embodiment shown in FIG. 1, the drinking water supply device is provided independently, but the drinking water supply device may be combined with a part of another device such as a refrigerator.

Hereinafter, a configuration and piping of a drinking water supply apparatus provided with a mineral water supply module according to an embodiment of the present invention will be described with reference to FIG.

2 is a conceptual view showing a structure and piping of a drinking water supply device according to an embodiment of the present invention.

2, the drinking water supply device 1 according to the embodiment of the present invention converts raw water introduced into the drinking water supply device 1 through the external water supply source 10 into purified water via the filter part 20 .

The configuration of the filter unit 20 can be variously modified, and the filter unit 20 can be configured through a plurality of single filters 21, 22, and 23.

For example, the filter unit 20 may include a pre-carbon filter 21, a UF filter 22, and a post-carbon filter 23.

The purified water is discharged through the purified water pipe 30, the purified water supply valve 32, and the cock 73 to the outside of the drinking water supply apparatus 1 when the raw water is filtered through the filter unit 20 to generate purified water .

At this time, the drinking water supply device 1 may be configured to supply cold water or hot water according to a user's request.

The heated water supplied by heating the purified water is supplied to the first branched purified water pipe 301, the heating device 51, the hot water pipe 50, and the second branched water pipe 30 branched from the point A of the purified water pipe 30 located at the rear end of the filter unit 20, The hot water supply valve 52, and the cock 73. [0053]

The cold water to be supplied by cooling the purified water is supplied to the second branch purified water pipe 302, the cooling device 41, the cold water pipe 40, the cold water supply valve 42, (73).

For convenience of explanation, FIG. 2 shows an embodiment in which purified water, cold water and hot water are discharged through a single cock 73. However, it is also possible that each coke for water, cold water and hot water is provided, or one coke for pure water and cold water and another coke for hot water.

A cock valve 74 (hereinafter, also referred to as a "first valve") is provided on the rear end (that is, the downstream side) of the purified water supply valve 32, the cold water supply valve 42 and the hot water supply valve 52 .

The cock valve 74 may be connected to the distribution pipe 60. The distribution pipe 60 may be connected to the purified water pipe 30, the cold water pipe 40, and the hot water pipe 50, respectively.

An outflow pipe 70 to which purified water, cold water or hot water can be supplied may be provided at the rear end of the cock valve 74.

Water, cold water or hot water can be supplied to the distribution pipe 60 and purified water, cold water or hot water can be selectively supplied to the outflow pipe 70 when the cock 73 is opened through the single cock valve 74 Lt; / RTI >

Meanwhile, a mineralsupply module 100 for supplying minerals to the drinking water flowing into the outflow pipe 70 may be connected to the outflow pipe 70.

The mineral supply module 100 may be connected to one side of the outflow pipe 70 through a connection pipe 120 connected to the outflow pipe 70. At this time, the connection pipe 120 may be formed as a mineral water generating part in which drinking water and minerals are mixed.

The outflow pipe 70 has a first flow path 71 connected to the connection pipe 120 at a front end of the connection pipe 120 and a second flow path 71 connected to the connection pipe 120 at a rear end of the connection pipe 120. [ And a flow path 72.

When the coke valve 74 is opened, purified water, cold water or hot water flows into the first flow path 71 toward the coke 73 and flows into the connecting pipe 120 before being discharged through the coke 73 have.

That is, the first flow path 71 is disposed on the upstream side of the connection pipe 120 to supply drinking water such as purified water, cold water or hot water toward the connection pipe 120.

The outflow channel 72 is provided between the connection pipe 120 and the cock 73 so that the mineral water generated in the connection pipe 120 can be selectively discharged to the cock 73.

The mineral supply module 100 includes a mineral vessel 140, a second channel 110 connecting the connection pipe 120 and the mineral vessel 140, a mineral valve (not shown) provided on the second channel 110, 130, hereinafter also referred to as "second valve").

The mineral supply module 100 further includes a pump 160 for supplying compressed air to press the mineral container 140, a third flow path 500 for connecting the mineral container 140 and the pump 160, And a third valve (510) installed in the third flow path (500).

The third valve 510 does not open or close the third flow path 500 but controls the flow path of the third flow path 500 to the outside of the third flow path 500. That is, when the third valve 510 opens the flow path, the third flow path 500 can communicate with the outside, and when the third flow path 510 seals the flow path, And is sealed from the outside.

The mineral supplied from the mineral supply module 100 to the connection pipe 120 may be a concentrated mineral having a high concentration.

The amount of minerals supplied from the mineral supply module 100 to the connection pipe 120 may be an important factor for determining the taste of the mineral water discharged through the coke 73.

At this time, the amount of minerals supplied from the mineral supply module 100 to the connection pipe 120 may be extremely small compared to the flow rate of the drinking water flowing through the connection pipe 120 (i.e., purified water, hot water or cold water) have.

Therefore, the connection pipe 120 may be provided with the fine flow path portion 121. That is, the concentrated minerals can be supplied to the drinking water flowing into the connection pipe 120 through the micro channel part 121.

For example, the connector tube 120 may be formed in a "T" shape.

The connection pipe 120 includes a mixing pipe 122 provided between the first flow path 71 and the outflow path 72 in parallel with the first flow path 71 and the outflow path 72, And a fine channel portion 121 formed to supply concentrated minerals toward the mixing pipe 122 in a direction perpendicular to the pipe 122.

Hereinafter, the specific structure of the mineral supply module 100 and the structure in which the mineral is supplied from the mineral supply module 100 to the outflow pipe 70 will be described in detail with reference to FIG.

3 is a view schematically showing a configuration of a mineral supply module according to an embodiment of the present invention.

Hereinafter, for convenience of explanation, reference numeral 74 denoted by a cock valve in the upper part is denoted by a first valve.

2 and 3 together, the drinking water supply device 1 according to the embodiment of the present invention includes an outflow pipe 70 formed to allow the drinking water to flow, a flow rate sensor 75 configured to sense the flow rate of the drinking water, A second channel 110 formed to supply minerals toward the connection pipe 120, a mineral container 140 containing concentrated minerals, a second channel 110 formed to supply minerals toward the connection pipe 120, A pump 160 configured to press the mineral vessel 140 and a third flow channel 510 connecting the mineral vessel 140 and the pump 160.

The outflow pipe (70) may include a first flow path (71) and an outflow path (72). At this time, the first flow path 71 may be provided on the upstream side of the outflow channel 72.

Specifically, the first flow path 71 may be formed to allow drinking water to flow, and the first flow path 71 may include a first valve 74 formed to selectively open and close the first flow path 71 .

The flow sensor 75 may be configured to sense the flow rate of the drinking water flowing through the outflow pipe 70. More specifically, the flow rate sensor 75 may be configured to detect the flow rate of the drinking water flowing through the first flow path 71 in real time.

The flow sensor 75 may be provided in the purified water pipe 30 at the rear end of the filter unit 20 or may be provided in the first flow path 71. That is, the flow rate sensor 75 may be provided in a pipe or a flow path provided upstream of the connection pipe 120 to detect the flow rate of the drinking water.

The outflow channel 72 may be connected to the rear end of the first channel 71 to discharge drinking water. That is, the drinking water flows sequentially through the first flow path 71 and the outflow path 72, and can be discharged through the cock 73.

The connection pipe 120 may be formed to connect the first flow path 71 and the outlet flow path 72.

The connection pipe 120 may be formed in a T shape and includes a mixing pipe 122 for guiding drinking water having passed through the first flow path 71 to the outflow channel 72, And a fine channel portion 121 for forming a channel for concentrated minerals flowing toward the mixing pipe 122 in a direction perpendicular to the mixing pipe 122.

When the concentrated minerals are guided to the mixing pipe 122, the pressure of the concentrated minerals can be lowered while passing through the fine channel portion 121.

The cross-sectional diameter of the micro channel portion 121 may be smaller than the length of the micro channel portion 121. In addition, the cross-sectional area of the micro channel portion 121 may be smaller than the cross-sectional area of the mixing tube 122.

Therefore, the capacity of the concentrated mineral guided toward the mixing pipe 122 can be precisely controlled.

The second flow path 110 may be formed to supply minerals (for example, concentrated minerals) toward the connection pipe 120. That is, the second flow path 110 may be formed as a mineral supply pipe (or a mineral supply pipe).

One end of the second flow path 110 in the longitudinal direction may be connected to the connection pipe 120. More specifically, one end of the second flow path 110 in the longitudinal direction may be connected to the micro flow path portion 121 of the connection pipe 120.

Accordingly, the supply pressure of the concentrated minerals supplied through the second flow path 110 can be lowered by the fine flow path portion 121. That is, the micro channel section 121 functions to lower the supply pressure of the concentrated minerals supplied through the second channel 110.

Also, the second valve 110 may be provided with the second valve 130. The second valve (130) is formed to selectively open and close the second flow path (110).

The mineral vessel 140 may be configured to receive concentrated minerals. Also, the mineral container 140 may be connected to the connection pipe 120 through the second flow path 110.

That is, one end of the second flow path 110 in the longitudinal direction is connected to the connection pipe 120, and the other end in the longitudinal direction of the second flow path 110 may be connected to the mineral container 140.

The pump 160 may be configured to press the inside of the mineral container 140 to discharge the concentrated mineral contained in the mineral container 140 to the outside of the mineral container 140.

For example, the pump 160 may be an air pump. That is, the pump 160 may be an air pump configured to suck outside air and inject the outside air into the mineral vessel 140.

Accordingly, the pump 160 may suck external air and inject it into the mineral container 140 to raise the pressure in the mineral container 140.

That is, when external air is injected into the mineral container 140 by the driving of the pump 160, the concentrated mineral contained in the mineral container 140 due to the pressure rise in the mineral container 140 flows into the mineral container 140 140).

At this time, the concentrated mineral discharged out of the mineral vessel 140 flows into the second flow path 110, so that the pressure in the second flow path 110 can be increased. Since the inside of the mineral container 140 and the second flow path 110 are in communication with each other, the pressure in the mineral container 140 and the pressure in the second flow path 110 may be the same.

The pump 160 is connected to the mineral vessel 140 by a third flow path 510 so that the compressed air generated by the pump 160 flows through the third flow path 510 to the mineral vessel 140 .

The third flow path 510 is provided with the third valve 500 for communicating the third flow path 510 to the outside. The third valve 500 does not open or close the third flow path 510 but opens and closes a flow path through which the third flow path 510 communicates with the outside. Accordingly, the compressed air generated by the pump 160 is guided to the mineral container 140 even if the third valve 500 closes the flow path.

An injection hole 141 for injecting outside air into the mineral container 140 and a discharge hole 142 through which the concentrated mineral is discharged from the mineral container 140 are formed in the lower portion of the mineral container 140 .

Concretely, the concentrated mineral contained in the mineral container 140 is directed to the lower side of the mineral container 140 by gravity. At this time, since the injection hole 141 and the discharge hole 142 are formed on the lower side of the mineral vessel 140, the airtightness of the mineral vessel 140 can be improved.

More specifically, the drinking water supply apparatus 1 according to an embodiment of the present invention may further include a container fastening part 150 fastened to the mineral container 150 at a lower side of the mineral container 140.

At this time, the injection hole 141 and the discharge hole 142 may be formed at the lower end of the container coupling part 150.

The container coupling part 150 may include an air injection path 143 communicating with the injection hole 141 and a mineral discharge path 144 communicating with the discharge hole 142.

At this time, the injection hole 141 can communicate with the inside of the mineral vessel 140 through the air injection channel 143, and the discharge hole 142 can communicate with the mineral vessel 140 through the mineral discharge channel 144 140, respectively.

Since the pump 160, that is, the air pump, is formed to inject air into the mineral container 140, it is necessary to maintain the airtightness of the mineral container 140 in order to discharge the required amount of concentrated mineral from the mineral container 140 .

Since the mineral container 140 is disposed on the upper side of the container coupling part 150 and the injection hole 141 and the discharge hole 142 are provided on the lower end of the container coupling part 150 , The airtightness of the mineral container 140 can be improved.

In addition, an air filter 161 may be provided at the air inlet side of the pump 160. The air filter 161 controls the impurities contained in the air injected into the mineral vessel 140 through the pump 160. At this time, the air filter 161 may be formed of a hydrophobic member.

The connection line 162 connecting the pump 160 and the mineral container 140 (i.e., the container coupling unit 150) may be provided with a check fitting or a check valve 163.

The check fitting or check valve 163 prevents minerals from flowing back toward the pump 160 from the mineral container 140. This is because when the mineral flows back to the pump 160, the pump 160 may be damaged.

The drinking water supply device 1 according to the embodiment of the present invention controls the first valve 74, the flow sensor 75, the second valve 130, the pump 160, the third valve 500, And a control unit 180 for controlling the operation of the apparatus.

The control unit 180 may be electrically connected to the first valve 74, the flow sensor 75, the second valve 130, the pump 160, and the third valve 500.

Referring to FIG. 4, the process of detaching the mineral container will be described.

First, the user can input a signal to detach the already installed mineral container 140 through the input unit 4 (S10). The input unit 4 may include a button for inputting a touch screen or a button for inputting a predetermined signal.

When a signal for desorbing the mineral container 140 is inputted, the controller 180 turns off the pump 160 (S12). The pump 160 is driven when the pressure drops below a predetermined pressure, and can be maintained in a stopped state when a predetermined pressure is maintained. That is, the pump 160 maintains a predetermined pressure in the mineral container 140. Since the inside of the mineral container 140 and the third flow path 510 are connected to each other, The pressure of the third flow path 510 may be the same.

The compressed air is not supplied to the inside of the third flow path 510 and the mineral vessel 140 because the pump 160 stops driving and the pressure is increased during the removal of the mineral vessel 140 It does not.

After the driving of the pump 160 is stopped, the control unit 180 opens the flow path of the third valve 500 (S14).

Since the third valve 500 selectively communicates the third flow path 510 with the outside, when the flow path of the third valve 500 is opened, the third flow path 510 communicates with the outside . Accordingly, the pressure that has been raised by the pump 160 is lowered. That is, the internal pressure of the third flow path 510 and the mineral vessel 140 becomes equal to the atmospheric pressure by the third valve 500.

Therefore, even if the user removes the mineral container 140, since the pressure inside the mineral container 140 is equal to the atmospheric pressure, the mineral container 140 can be prevented from splashing.

Meanwhile, when the signal for mounting the mineral container is input in step S10, the second valve (130) closes the second flow path (110), thereby blocking minerals from moving in the second flow path (110). In this case, it is possible to prevent the minerals from being arbitrarily moved and contaminated.

Referring to Fig. 5, the process of mounting the mineral container will be described.

The user can input a signal for mounting the mineral container 140 through the input unit 4 (S20).

When the related signal is input in the input unit 4, the controller 180 closes the flow path in the third valve 500 (S22). The third valve 500 does not close the third flow path 510 but opens and closes the flow path communicating with the outside air at the portion where the third valve 510 is installed, The pump 160 and the mineral container 140 are connected to each other through the third flow path 510 even if the third flow path 510 seals the flow path.

The control unit 180 may turn on the pump 160 (S24). The pump 160 may be controlled to maintain a constant pressure within the third flow path 510 and the mineral vessel 140. Therefore, it is possible that the pump 160 is driven immediately when the control unit 180 turns on the pump 160 so that the compressed air can not be moved to the mineral container 140.

For example, if the pressure of the mineral vessel 140 is maintained at a predetermined level even when the mineral vessel 140 is newly installed, the pump 160 may not generate compressed air at that time. On the other hand, when the user manipulates the lever 4 to discharge the mineral water, minerals are discharged from the mineral container 140 to the outside, so that the inner pressure of the mineral container 140 is lowered. In this situation, the pump 160 may be driven to move the compressed air to the mineral container 140 through the third flow path 510.

It is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

1 Drinking water supply unit 10 Water supply
20 filter section 30 purified water pipe
40 Cold water piping 50 Hot water piping
60 Distribution pipe 70 Outflow pipe
71 first flow path 72 outflow channel
74 1st valve 75 Flow sensor
100 mineral supply module 110 second flow path
120 connector 121 micro flow path
122 Mixing tube 130 Second valve
140 mineral container 150 container connection part
160 pump 180 control unit
500 Third valve 510 Third flow path

Claims (10)

A first valve having a first valve for opening and closing a flow path, the first flow path for guiding drinking water;
An outflow channel connected to a rear end of the first flow path for discharging the drinking water;
A connection pipe connecting the first flow path and the outflow path;
A second flow path provided with a second valve for supplying minerals toward the connection pipe and opening and closing the flow path;
A mineral container connected to the connection pipe through the second flow path and disposed at a front end of the second valve to receive concentrated mineral;
A pump for supplying compressed air to pressurize the inside of the mineral container to discharge the concentrated mineral to the outside of the mineral container;
A third flow path connecting the pump and the mineral vessel to guide the compressed air generated in the pump to the mineral vessel;
A third valve provided in the third flow path for selectively releasing the pressure in the third flow path; And
And a controller for controlling the third valve to release the pressure of the third flow path from the third valve. The method according to claim 1,
Further comprising an input unit for inputting whether or not the mineral container is detached,
Wherein the control unit releases the pressure of the third flow path by communicating the third flow path from the third valve to the outside when the minerals container is detached from the input unit. 3. The method of claim 2,
Wherein the control unit operates the third valve after stopping the driving of the pump. 3. The method of claim 2,
Wherein the control unit closes the third flow path from the outside when receiving the input of the mineral container from the input unit. 5. The method of claim 4,
And the control unit drives the pump after closing the third flow path by the third valve. 3. The method of claim 2,
Wherein the control unit closes the second flow path from the second valve when receiving the input of the minerals container from the input unit. Receiving a long desorption signal of a mineral container for supplying concentrated minerals to mix with drinking water; And
When a signal indicating that the mineral vessel is desorbed is inputted, the pump connected to the mineral vessel and applying pressure by the compressed air is turned off,
And opening a third valve for releasing the pressure of the third flow path by communicating a third flow path connecting the pump and the mineral container to the outside. 8. The method of claim 7,
When a signal indicating that the mineral container is mounted,
Closing the flow path of the third valve to seal the third flow path from the outside. 9. The method of claim 8,
And the pump is turned on after the flow path of the third valve is closed. 10. The method of claim 9,
Further comprising the step of sealing the flow path in a second valve disposed on a flow path that is discharged from the mineral vessel when a signal indicating that the mineral vessel is inserted and removed is sealed.

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